/* $Id$
This file is part of the HandBrake source code.
Homepage: .
It may be used under the terms of the GNU General Public License. */
#include
#include
#include
#include "hb.h"
#include "hbffmpeg.h"
#include "lang.h"
#include "a52dec/a52.h"
#include "mp4v2/mp4v2.h"
#include "libbluray/bluray.h"
#define min(a, b) a < b ? a : b
#define HB_MAX_PROBE_SIZE (1*1024*1024)
/*
* This table defines how ISO MPEG stream type codes map to HandBrake
* codecs. It is indexed by the 8 bit stream type and contains the codec
* worker object id and a parameter for that worker proc (ignored except
* for the ffmpeg-based codecs in which case it is the ffmpeg codec id).
*
* Entries with a worker proc id of 0 or a kind of 'U' indicate that HB
* doesn't handle the stream type.
* N - Not used
* U - Unknown (to be determined by further processing)
* A - Audio
* V - Video
* P - PCR
*/
typedef enum { N, U, A, V, P } kind_t;
typedef struct {
kind_t kind; /* not handled / unknown / audio / video */
int codec; /* HB worker object id of codec */
int codec_param; /* param for codec (usually ffmpeg codec id) */
const char* name; /* description of type */
} stream2codec_t;
#define st(id, kind, codec, codec_param, name) \
[id] = { kind, codec, codec_param, name }
static const stream2codec_t st2codec[256] = {
st(0x00, U, 0, 0, NULL),
st(0x01, V, WORK_DECMPEG2, 0, "MPEG1"),
st(0x02, V, WORK_DECMPEG2, 0, "MPEG2"),
st(0x03, A, HB_ACODEC_FFMPEG, CODEC_ID_MP2, "MPEG1"),
st(0x04, A, HB_ACODEC_FFMPEG, CODEC_ID_MP2, "MPEG2"),
st(0x05, N, 0, 0, "ISO 13818-1 private section"),
st(0x06, U, 0, 0, "ISO 13818-1 PES private data"),
st(0x07, N, 0, 0, "ISO 13522 MHEG"),
st(0x08, N, 0, 0, "ISO 13818-1 DSM-CC"),
st(0x09, N, 0, 0, "ISO 13818-1 auxiliary"),
st(0x0a, N, 0, 0, "ISO 13818-6 encap"),
st(0x0b, N, 0, 0, "ISO 13818-6 DSM-CC U-N msgs"),
st(0x0c, N, 0, 0, "ISO 13818-6 Stream descriptors"),
st(0x0d, N, 0, 0, "ISO 13818-6 Sections"),
st(0x0e, N, 0, 0, "ISO 13818-1 auxiliary"),
st(0x0f, A, HB_ACODEC_FFAAC, CODEC_ID_AAC, "AAC"),
st(0x10, V, WORK_DECAVCODECV, CODEC_ID_MPEG4, "MPEG4"),
st(0x11, A, HB_ACODEC_FFMPEG, CODEC_ID_AAC_LATM, "LATM AAC"),
st(0x12, U, 0, 0, "MPEG4 generic"),
st(0x14, N, 0, 0, "ISO 13818-6 DSM-CC download"),
st(0x1b, V, WORK_DECAVCODECV, CODEC_ID_H264, "H.264"),
st(0x80, U, HB_ACODEC_FFMPEG, CODEC_ID_PCM_BLURAY, "Digicipher II Video"),
st(0x81, A, HB_ACODEC_AC3, 0, "AC3"),
st(0x82, A, HB_ACODEC_DCA, 0, "DTS"),
// 0x83 can be LPCM or BD TrueHD. Set to 'unknown' till we know more.
st(0x83, U, HB_ACODEC_LPCM, 0, "LPCM"),
// BD E-AC3 Primary audio
st(0x84, U, 0, 0, "SDDS"),
st(0x85, U, 0, 0, "ATSC Program ID"),
// 0x86 can be BD DTS-HD/DTS. Set to 'unknown' till we know more.
st(0x86, U, HB_ACODEC_DCA_HD, CODEC_ID_DTS, "DTS-HD MA"),
st(0x87, A, HB_ACODEC_FFMPEG, CODEC_ID_EAC3, "E-AC3"),
st(0x8a, A, HB_ACODEC_DCA, 0, "DTS"),
st(0x90, N, 0, 0, "PGS Subtitle"),
// 0x91 can be AC3 or BD Interactive Graphics Stream.
st(0x91, U, 0, 0, "AC3/IGS"),
st(0x92, N, 0, 0, "Subtitle"),
st(0x94, U, 0, 0, "SDDS"),
st(0xa0, V, 0, 0, "MSCODEC"),
// BD E-AC3 Secondary audio
st(0xa1, U, 0, 0, "E-AC3"),
// BD DTS-HD Secondary audio
st(0xa2, U, 0, 0, "DTS-HD MA"),
st(0xea, V, WORK_DECAVCODECV, CODEC_ID_VC1, "VC-1"),
};
#undef st
typedef enum {
hb_stream_type_unknown = 0,
transport,
program,
ffmpeg
} hb_stream_type_t;
#define MAX_PS_PROBE_SIZE (5*1024*1024)
#define kMaxNumberPMTStreams 32
typedef struct {
hb_buffer_t *buf;
hb_buffer_t *extra_buf;
int8_t skipbad;
int8_t continuity;
uint8_t pkt_summary[8];
int pid;
uint8_t is_pcr;
int pes_list;
} hb_ts_stream_t;
typedef struct {
int map_idx;
int stream_id;
uint8_t stream_id_ext;
uint8_t stream_type;
kind_t stream_kind;
int lang_code;
uint32_t format_id;
#define TS_FORMAT_ID_AC3 (('A' << 24) | ('C' << 16) | ('-' << 8) | '3')
int codec; // HB worker object id of codec
int codec_param; // param for codec (usually ffmpeg codec id)
char codec_name[80];
int next; // next pointer for list
// hb_ts_stream_t points to a list of
// hb_pes_stream_t
hb_buffer_t *probe_buf;
int probe_next_size;
} hb_pes_stream_t;
struct hb_stream_s
{
int scan;
int frames; /* video frames so far */
int errors; /* total errors so far */
int last_error_frame; /* frame # at last error message */
int last_error_count; /* # errors at last error message */
int packetsize; /* Transport Stream packet size */
int need_keyframe; // non-zero if want to start at a keyframe
hb_buffer_t *fwrite_buf; /* PS buffer (set by hb_ts_stream_decode) */
int chapter; /* Chapter that we are currently in */
int64_t chapter_end; /* HB time that the current chapter ends */
struct
{
uint8_t found_pcr; // non-zero if we've found at least one pcr
int pcr_out; // sequence number of most recent output pcr
int pcr_in; // sequence number of most recent input pcr
int64_t pcr; // most recent input pcr
int64_t pcr_current; // circular buffer of output pcrs
uint8_t *packet; // buffer for one TS packet
hb_ts_stream_t *list;
int count;
int alloc;
} ts;
struct
{
uint8_t found_scr; // non-zero if we've found at least one scr
int64_t scr; // most recent input scr
hb_pes_stream_t *list;
int count;
int alloc;
} pes;
/*
* Stuff before this point is dynamic state updated as we read the
* stream. Stuff after this point is stream description state that
* we learn during the initial scan but cache so it can be
* reused during the conversion read.
*/
uint8_t has_IDRs; // # IDRs found during duration scan
uint8_t ts_flags; // stream characteristics:
#define TS_HAS_PCR (1 << 0) // at least one PCR seen
#define TS_HAS_RAP (1 << 1) // Random Access Point bit seen
#define TS_HAS_RSEI (1 << 2) // "Restart point" SEI seen
int recovery_frames;
char *path;
FILE *file_handle;
hb_stream_type_t hb_stream_type;
hb_title_t *title;
AVFormatContext *ffmpeg_info_ic;
AVFormatContext *ffmpeg_reader_ic;
AVPacket *ffmpeg_pkt;
uint8_t ffmpeg_video_id;
uint32_t reg_desc; // 4 byte registration code that identifies
// stream semantics
struct
{
unsigned short program_number;
unsigned short program_map_PID;
} pat_info[kMaxNumberPMTStreams];
int ts_number_pat_entries;
struct
{
int reading;
unsigned char *tablebuf;
unsigned int tablepos;
unsigned char current_continuity_counter;
unsigned int PCR_PID;
} pmt_info;
};
typedef struct {
uint8_t *buf;
uint32_t val;
int pos;
int size;
} bitbuf_t;
typedef struct
{
uint8_t has_stream_id_ext;
uint8_t stream_id;
uint8_t stream_id_ext;
uint8_t bd_substream_id;
int64_t pts;
int64_t dts;
int64_t scr;
int header_len;
int packet_len;
} hb_pes_info_t;
/***********************************************************************
* Local prototypes
**********************************************************************/
static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle);
static off_t align_to_next_packet(hb_stream_t *stream);
static int64_t pes_timestamp( const uint8_t *pes );
static void hb_ts_stream_init(hb_stream_t *stream);
static hb_buffer_t * hb_ts_stream_decode(hb_stream_t *stream);
static void hb_init_audio_list(hb_stream_t *stream, hb_title_t *title);
static void hb_ts_stream_find_pids(hb_stream_t *stream);
static void hb_ps_stream_init(hb_stream_t *stream);
static hb_buffer_t * hb_ps_stream_decode(hb_stream_t *stream);
static void hb_ps_stream_find_streams(hb_stream_t *stream);
static int hb_ps_read_packet( hb_stream_t * stream, hb_buffer_t *b );
static int update_ps_streams( hb_stream_t * stream, int stream_id, int stream_id_ext, int stream_type, int in_kind );
static int update_ts_streams( hb_stream_t * stream, int pid, int stream_id_ext, int stream_type, int in_kind, int *pes_idx );
static void update_pes_kind( hb_stream_t * stream, int idx );
static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title, int scan );
static void ffmpeg_close( hb_stream_t *d );
static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream, hb_title_t *title );
hb_buffer_t *hb_ffmpeg_read( hb_stream_t *stream );
static int ffmpeg_seek( hb_stream_t *stream, float frac );
static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts );
static inline unsigned int bits_get(bitbuf_t *bb, int bits);
static inline void bits_init(bitbuf_t *bb, uint8_t* buf, int bufsize, int clear);
static inline int bits_eob(bitbuf_t *bb);
static inline int bits_read_ue(bitbuf_t *bb );
static void pes_add_audio_to_title(hb_stream_t *s, int i, hb_title_t *t, int sort);
static int hb_parse_ps( hb_stream_t *stream, uint8_t *buf, int len, hb_pes_info_t *pes_info );
static void hb_ts_resolve_pid_types(hb_stream_t *stream);
static void hb_ps_resolve_stream_types(hb_stream_t *stream);
void hb_ts_stream_reset(hb_stream_t *stream);
void hb_ps_stream_reset(hb_stream_t *stream);
/*
* streams have a bunch of state that's learned during the scan. We don't
* want to throw away the state when scan does a close then relearn
* everything when reader does an open. So we save the stream state on
* the close following a scan and reuse it when 'reader' does an open.
*/
static hb_list_t *stream_state_list;
static hb_stream_t *hb_stream_lookup( const char *path )
{
if ( stream_state_list == NULL )
return NULL;
hb_stream_t *ss;
int i = 0;
while ( ( ss = hb_list_item( stream_state_list, i++ ) ) != NULL )
{
if ( strcmp( path, ss->path ) == 0 )
{
break;
}
}
return ss;
}
static void hb_stream_state_delete( hb_stream_t *ss )
{
hb_list_rem( stream_state_list, ss );
free( ss->path );
free( ss );
}
/*
* logging routines.
* these frontend hb_log because transport streams can have a lot of errors
* so we want to rate limit messages. this routine limits the number of
* messages to at most one per minute of video. other errors that occur
* during the minute are counted & the count is output with the next
* error msg we print.
*/
static void ts_warn_helper( hb_stream_t *stream, char *log, va_list args )
{
// limit error printing to at most one per minute of video (at 30fps)
++stream->errors;
if ( stream->frames - stream->last_error_frame >= 30*60 )
{
char msg[256];
vsnprintf( msg, sizeof(msg), log, args );
if ( stream->errors - stream->last_error_count < 10 )
{
hb_log( "stream: error near frame %d: %s", stream->frames, msg );
}
else
{
int Edelta = stream->errors - stream->last_error_count;
double Epcnt = (double)Edelta * 100. /
(stream->frames - stream->last_error_frame);
hb_log( "stream: %d new errors (%.0f%%) up to frame %d: %s",
Edelta, Epcnt, stream->frames, msg );
}
stream->last_error_frame = stream->frames;
stream->last_error_count = stream->errors;
}
}
static void ts_warn( hb_stream_t*, char*, ... ) HB_WPRINTF(2,3);
static void ts_err( hb_stream_t*, int, char*, ... ) HB_WPRINTF(3,4);
static void ts_warn( hb_stream_t *stream, char *log, ... )
{
va_list args;
va_start( args, log );
ts_warn_helper( stream, log, args );
va_end( args );
}
static int get_id(hb_pes_stream_t *pes)
{
return ( pes->stream_id_ext << 16 ) + pes->stream_id;
}
static int index_of_id(hb_stream_t *stream, int id)
{
int i;
for ( i = 0; i < stream->pes.count; ++i )
{
if ( id == get_id( &stream->pes.list[i] ) )
return i;
}
return -1;
}
static int index_of_pid(hb_stream_t *stream, int pid)
{
int i;
for ( i = 0; i < stream->ts.count; ++i )
{
if ( pid == stream->ts.list[i].pid )
{
return i;
}
}
return -1;
}
static int index_of_ps_stream(hb_stream_t *stream, int id, int sid)
{
int i;
for ( i = 0; i < stream->pes.count; ++i )
{
if ( id == stream->pes.list[i].stream_id &&
sid == stream->pes.list[i].stream_id_ext )
{
return i;
}
}
// If there is no match on the stream_id_ext, try matching
// on only the stream_id.
for ( i = 0; i < stream->pes.count; ++i )
{
if ( id == stream->pes.list[i].stream_id &&
0 == stream->pes.list[i].stream_id_ext )
{
return i;
}
}
return -1;
}
static kind_t ts_stream_kind( hb_stream_t * stream, int idx )
{
if ( stream->ts.list[idx].pes_list != -1 )
{
// Retuns kind for the first pes substream in the pes list
// All substreams in a TS stream are the same kind.
return stream->pes.list[stream->ts.list[idx].pes_list].stream_kind;
}
else
{
return U;
}
}
static kind_t ts_stream_type( hb_stream_t * stream, int idx )
{
if ( stream->ts.list[idx].pes_list != -1 )
{
// Retuns stream type for the first pes substream in the pes list
// All substreams in a TS stream are the same stream type.
return stream->pes.list[stream->ts.list[idx].pes_list].stream_type;
}
else
{
return 0x00;
}
}
static int pes_index_of_video(hb_stream_t *stream)
{
int i;
for ( i = 0; i < stream->pes.count; ++i )
if ( V == stream->pes.list[i].stream_kind )
return i;
return -1;
}
static int ts_index_of_video(hb_stream_t *stream)
{
int i;
for ( i = 0; i < stream->ts.count; ++i )
if ( V == ts_stream_kind( stream, i ) )
return i;
return -1;
}
static void ts_err( hb_stream_t *stream, int curstream, char *log, ... )
{
va_list args;
va_start( args, log );
ts_warn_helper( stream, log, args );
va_end( args );
stream->ts.list[curstream].skipbad = 1;
stream->ts.list[curstream].continuity = -1;
}
static int check_ps_sync(const uint8_t *buf)
{
// a legal MPEG program stream must start with a Pack header in the
// first four bytes.
return (buf[0] == 0x00) && (buf[1] == 0x00) &&
(buf[2] == 0x01) && (buf[3] == 0xba);
}
static int check_ps_sc(const uint8_t *buf)
{
// a legal MPEG program stream must start with a Pack followed by a
// some other start code. If we've already verified the pack, this skip
// it and checks for a start code prefix.
int pos;
int mark = buf[4] >> 4;
if ( mark == 0x02 )
{
// mpeg-1 pack header
pos = 12; // skip over the PACK
}
else
{
// mpeg-2 pack header
pos = 14 + ( buf[13] & 0x7 ); // skip over the PACK
}
return (buf[pos+0] == 0x00) && (buf[pos+1] == 0x00) && (buf[pos+2] == 0x01);
}
static int check_ts_sync(const uint8_t *buf)
{
// must have initial sync byte & a legal adaptation ctrl
return (buf[0] == 0x47) && (((buf[3] & 0x30) >> 4) > 0);
}
static int have_ts_sync(const uint8_t *buf, int psize, int count)
{
int ii;
for ( ii = 0; ii < count; ii++ )
{
if ( !check_ts_sync(&buf[ii*psize]) )
return 0;
}
return 1;
}
static int hb_stream_check_for_ts(const uint8_t *buf)
{
// transport streams should have a sync byte every 188 bytes.
// search the first 8KB of buf looking for at least 8 consecutive
// correctly located sync patterns.
int offset = 0;
int count = 16;
for ( offset = 0; offset < 8*1024-count*188; ++offset )
{
if ( have_ts_sync( &buf[offset], 188, count) )
return 188 | (offset << 8);
if ( have_ts_sync( &buf[offset], 192, count) )
return 192 | (offset << 8);
if ( have_ts_sync( &buf[offset], 204, count) )
return 204 | (offset << 8);
if ( have_ts_sync( &buf[offset], 208, count) )
return 208 | (offset << 8);
}
return 0;
}
static int hb_stream_check_for_ps(hb_stream_t *stream)
{
uint8_t buf[2048*4];
uint8_t sc_buf[4];
int pos = 0;
fseek(stream->file_handle, 0, SEEK_SET);
// program streams should start with a PACK then some other mpeg start
// code (usually a SYS but that might be missing if we only have a clip).
while (pos < 512 * 1024)
{
int offset;
if ( fread(buf, 1, sizeof(buf), stream->file_handle) != sizeof(buf) )
return 0;
for ( offset = 0; offset < 8*1024-27; ++offset )
{
if ( check_ps_sync( &buf[offset] ) && check_ps_sc( &buf[offset] ) )
{
int pes_offset, prev, data_len;
uint8_t sid;
uint8_t *b = buf+offset;
// Skip the pack header
int mark = buf[4] >> 4;
if ( mark == 0x02 )
{
// mpeg-1 pack header
pes_offset = 12;
}
else
{
// mpeg-2 pack header
pes_offset = 14 + ( buf[13] & 0x7 );
}
b += pes_offset;
// Get the next stream id
sid = b[3];
data_len = (b[4] << 8) + b[5];
if ( data_len && sid > 0xba && sid < 0xf9 )
{
prev = ftell( stream->file_handle );
pos = prev - ( sizeof(buf) - offset );
pos += pes_offset + 6 + data_len;
fseek( stream->file_handle, pos, SEEK_SET );
if ( fread(sc_buf, 1, 4, stream->file_handle) != 4 )
return 0;
if (sc_buf[0] == 0x00 && sc_buf[1] == 0x00 &&
sc_buf[2] == 0x01)
{
return 1;
}
fseek( stream->file_handle, prev, SEEK_SET );
}
}
}
fseek( stream->file_handle, -27, SEEK_CUR );
pos = ftell( stream->file_handle );
}
return 0;
}
static int hb_stream_get_type(hb_stream_t *stream)
{
uint8_t buf[2048*4];
if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
{
int psize;
if ( ( psize = hb_stream_check_for_ts(buf) ) != 0 )
{
int offset = psize >> 8;
psize &= 0xff;
hb_log("file is MPEG Transport Stream with %d byte packets"
" offset %d bytes", psize, offset);
stream->packetsize = psize;
stream->hb_stream_type = transport;
hb_ts_stream_init(stream);
return 1;
}
if ( hb_stream_check_for_ps(stream) != 0 )
{
hb_log("file is MPEG Program Stream");
stream->hb_stream_type = program;
hb_ps_stream_init(stream);
// We default to mpeg codec for ps streams if no
// video found in program stream map
return 1;
}
}
return 0;
}
static void hb_stream_delete_dynamic( hb_stream_t *d )
{
if( d->file_handle )
{
fclose( d->file_handle );
d->file_handle = NULL;
}
int i=0;
if ( d->ts.packet )
{
free( d->ts.packet );
d->ts.packet = NULL;
}
if ( d->ts.list )
{
for (i = 0; i < d->ts.count; i++)
{
if (d->ts.list[i].buf)
{
hb_buffer_close(&(d->ts.list[i].buf));
hb_buffer_close(&(d->ts.list[i].extra_buf));
d->ts.list[i].buf = NULL;
d->ts.list[i].extra_buf = NULL;
}
}
}
}
static void hb_stream_delete( hb_stream_t *d )
{
hb_stream_delete_dynamic( d );
free( d->ts.list );
free( d->pes.list );
free( d->path );
free( d );
}
static int audio_inactive( hb_stream_t *stream, int id, int stream_id_ext )
{
if ( id < 0 )
{
// PID declared inactive by hb_stream_title_scan
return 1;
}
if ( id == stream->pmt_info.PCR_PID )
{
// PCR PID is always active
return 0;
}
int i;
for ( i = 0; i < hb_list_count( stream->title->list_audio ); ++i )
{
hb_audio_t *audio = hb_list_item( stream->title->list_audio, i );
if ( audio->id == ((stream_id_ext << 16) | id) )
{
return 0;
}
}
return 1;
}
/* when the file was first opened we made entries for all the audio elementary
* streams we found in it. Streams that were later found during the preview scan
* now have an audio codec, type, rate, etc., associated with them. At the end
* of the scan we delete all the audio entries that weren't found by the scan
* or don't have a format we support. This routine deletes audio entry 'indx'
* by setting its PID to an invalid value so no packet will match it. (We can't
* move any of the entries since the index of the entry is used as the id
* of the media stream for HB. */
static void hb_stream_delete_ts_entry(hb_stream_t *stream, int indx)
{
if ( stream->ts.list[indx].pid > 0 )
{
stream->ts.list[indx].pid = -stream->ts.list[indx].pid;
}
}
static int hb_stream_try_delete_ts_entry(hb_stream_t *stream, int indx)
{
int ii;
if ( stream->ts.list[indx].pid < 0 )
return 1;
for ( ii = stream->ts.list[indx].pes_list; ii != -1;
ii = stream->pes.list[ii].next )
{
if ( stream->pes.list[ii].stream_id >= 0 )
return 0;
}
stream->ts.list[indx].pid = -stream->ts.list[indx].pid;
return 1;
}
static void hb_stream_delete_ps_entry(hb_stream_t *stream, int indx)
{
if ( stream->pes.list[indx].stream_id > 0 )
{
stream->pes.list[indx].stream_id = -stream->pes.list[indx].stream_id;
}
}
/***********************************************************************
* hb_stream_open
***********************************************************************
*
**********************************************************************/
hb_stream_t * hb_stream_open( char *path, hb_title_t *title, int scan )
{
FILE *f = fopen( path, "rb" );
if ( f == NULL )
{
hb_log( "hb_stream_open: open %s failed", path );
return NULL;
}
hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
if ( d == NULL )
{
fclose( f );
hb_log( "hb_stream_open: can't allocate space for %s stream state", path );
return NULL;
}
/*
* if we're opening the stream to read & convert, we need
* the state we saved when we scanned the stream. if we're
* opening the stream to scan it we want to rebuild the state
* (even if we have saved state, the stream may have changed).
*/
hb_stream_t *ss = hb_stream_lookup( path );
if ( !scan && ss && ss->hb_stream_type != ffmpeg )
{
/*
* copy the saved state since we might be encoding the same stream
* multiple times.
*/
memcpy( d, ss, sizeof(*d) );
d->file_handle = f;
d->title = title;
d->scan = scan;
d->path = strdup( path );
if ( d->hb_stream_type == transport )
{
d->ts.packet = malloc( d->packetsize );
int ii, jj;
for ( ii = 0; ii < d->ts.count; ii++)
{
// If probing didn't find audio or video, and the pid
// is not the PCR, remove the track
if ( ts_stream_kind ( d, ii ) == U &&
!d->ts.list[ii].is_pcr )
{
hb_stream_delete_ts_entry(d, ii);
continue;
}
if ( ts_stream_kind ( d, ii ) == A )
{
for ( jj = d->ts.list[ii].pes_list; jj != -1;
jj = d->pes.list[jj].next )
{
if ( audio_inactive( d, d->pes.list[jj].stream_id,
d->pes.list[jj].stream_id_ext ) )
{
hb_stream_delete_ps_entry(d, jj);
}
}
if ( !d->ts.list[ii].is_pcr &&
hb_stream_try_delete_ts_entry(d, ii) )
{
continue;
}
}
d->ts.list[ii].buf = hb_buffer_init(d->packetsize);
d->ts.list[ii].extra_buf = hb_buffer_init(d->packetsize);
d->ts.list[ii].buf->size = 0;
d->ts.list[ii].extra_buf->size = 0;
}
// reset to beginning of file and reset some stream
// state information
hb_stream_seek( d, 0. );
}
else if ( d->hb_stream_type == program )
{
int ii;
for ( ii = 0; ii < d->pes.count; ii++)
{
// If probing didn't find audio or video, remove the track
if ( d->pes.list[ii].stream_kind == U )
{
hb_stream_delete_ps_entry(d, ii);
}
if ( d->pes.list[ii].stream_kind == A &&
audio_inactive( d, d->pes.list[ii].stream_id,
d->pes.list[ii].stream_id_ext ) )
{
// this PID isn't wanted (we don't have a codec for it
// or scan didn't find audio parameters)
hb_stream_delete_ps_entry(d, ii);
continue;
}
}
// reset to beginning of file and reset some stream
// state information
hb_stream_seek( d, 0. );
}
return d;
}
/*
* opening for scan - delete any saved state then (re)scan the stream.
* If it's something we can deal with (MPEG2 PS or TS) return a stream
* reference structure & null otherwise.
*/
if ( ss != NULL )
{
hb_stream_state_delete( ss );
}
d->file_handle = f;
d->title = title;
d->scan = scan;
d->path = strdup( path );
if (d->path != NULL )
{
if ( hb_stream_get_type( d ) != 0 )
{
return d;
}
fclose( d->file_handle );
d->file_handle = NULL;
if ( ffmpeg_open( d, title, scan ) )
{
return d;
}
}
if ( d->file_handle )
{
fclose( d->file_handle );
}
if (d->path)
{
free( d->path );
}
hb_log( "hb_stream_open: open %s failed", path );
free( d );
return NULL;
}
static int new_pid( hb_stream_t * stream )
{
int num = stream->ts.alloc;
if ( stream->ts.count == stream->ts.alloc )
{
num = stream->ts.alloc ? stream->ts.alloc * 2 : 32;
stream->ts.list = realloc( stream->ts.list,
sizeof( hb_ts_stream_t ) * num );
}
int ii;
for ( ii = stream->ts.alloc; ii < num; ii++ )
{
memset(&stream->ts.list[ii], 0, sizeof( hb_ts_stream_t ));
stream->ts.list[ii].continuity = -1;
stream->ts.list[ii].pid = -1;
stream->ts.list[ii].pes_list = -1;
}
stream->ts.alloc = num;
num = stream->ts.count;
stream->ts.count++;
return num;
}
static int new_pes( hb_stream_t * stream )
{
int num = stream->pes.alloc;
if ( stream->pes.count == stream->pes.alloc )
{
num = stream->pes.alloc ? stream->pes.alloc * 2 : 32;
stream->pes.list = realloc( stream->pes.list,
sizeof( hb_pes_stream_t ) * num );
}
int ii;
for ( ii = stream->pes.alloc; ii < num; ii++ )
{
memset(&stream->pes.list[ii], 0, sizeof( hb_pes_stream_t ));
stream->pes.list[ii].stream_id = -1;
stream->pes.list[ii].next = -1;
}
stream->pes.alloc = num;
num = stream->pes.count;
stream->pes.count++;
return num;
}
hb_stream_t * hb_bd_stream_open( hb_title_t *title )
{
int ii;
hb_stream_t *d = calloc( sizeof( hb_stream_t ), 1 );
if ( d == NULL )
{
hb_error( "hb_bd_stream_open: can't allocate space for stream state" );
return NULL;
}
d->file_handle = NULL;
d->title = title;
d->path = NULL;
d->ts.packet = NULL;
int pid = title->video_id;
int stream_type = title->video_stream_type;
update_ts_streams( d, pid, 0, stream_type, V, NULL );
hb_audio_t * audio;
for ( ii = 0; ( audio = hb_list_item( title->list_audio, ii ) ); ++ii )
{
int stream_id_ext = audio->config.in.substream_type;
pid = audio->id & 0xFFFF;
stream_type = audio->config.in.stream_type;
update_ts_streams( d, pid, stream_id_ext, stream_type, A, NULL );
}
d->ts_flags = TS_HAS_RAP | TS_HAS_PCR;
// When scanning, title->job == NULL. We don't need to wait for
// a PCR when scanning. In fact, it trips us up on the first
// preview of every title since we would have to read quite a
// lot of data before finding the PCR.
if ( title->job )
{
// BD PCR PID is specified to always be 0x1001
update_ts_streams( d, 0x1001, 0, -1, P, NULL );
}
d->packetsize = 192;
d->hb_stream_type = transport;
for ( ii = 0; ii < d->ts.count; ii++ )
{
d->ts.list[ii].buf = hb_buffer_init(d->packetsize);
d->ts.list[ii].extra_buf = hb_buffer_init(d->packetsize);
d->ts.list[ii].buf->size = 0;
d->ts.list[ii].extra_buf->size = 0;
}
return d;
}
/***********************************************************************
* hb_stream_close
***********************************************************************
* Closes and frees everything
**********************************************************************/
void hb_stream_close( hb_stream_t ** _d )
{
hb_stream_t *stream = * _d;
if ( stream->hb_stream_type == ffmpeg )
{
ffmpeg_close( stream );
hb_stream_delete( stream );
*_d = NULL;
return;
}
if ( stream->frames )
{
hb_log( "stream: %d good frames, %d errors (%.0f%%)", stream->frames,
stream->errors, (double)stream->errors * 100. /
(double)stream->frames );
}
/*
* if the stream was opened for a scan, cache the result, otherwise delete
* the state.
*/
if ( stream->scan )
{
hb_stream_delete_dynamic( stream );
if ( stream_state_list == NULL )
{
stream_state_list = hb_list_init();
}
hb_list_add( stream_state_list, stream );
}
else
{
hb_stream_delete( stream );
}
*_d = NULL;
}
/***********************************************************************
* hb_ps_stream_title_scan
***********************************************************************
*
**********************************************************************/
hb_title_t * hb_stream_title_scan(hb_stream_t *stream, hb_title_t * title)
{
if ( stream->hb_stream_type == ffmpeg )
return ffmpeg_title_scan( stream, title );
// 'Barebones Title'
title->type = HB_STREAM_TYPE;
title->index = 1;
// Copy part of the stream path to the title name
char *sep = strrchr(stream->path, '/');
if (sep)
strcpy(title->name, sep+1);
char *dot_term = strrchr(title->name, '.');
if (dot_term)
*dot_term = '\0';
// Figure out how many audio streams we really have:
// - For transport streams, for each PID listed in the PMT (whether
// or not it was an audio stream type) read the bitstream until we
// find an packet from that PID containing a PES header and see if
// the elementary stream is an audio type.
// - For program streams read the first 4MB and take every unique
// audio stream we find.
hb_init_audio_list(stream, title);
// set the video id, codec & muxer
int idx = pes_index_of_video( stream );
if ( idx < 0 )
{
hb_title_close( &title );
return NULL;
}
title->video_id = get_id( &stream->pes.list[idx] );
title->video_codec = stream->pes.list[idx].codec;
title->video_codec_param = stream->pes.list[idx].codec_param;
title->demuxer = HB_MPEG_DEMUXER;
if (stream->hb_stream_type == transport)
{
// make sure we're grabbing the PCR PID
update_ts_streams( stream, stream->pmt_info.PCR_PID, 0, -1, P, NULL );
}
hb_stream_duration(stream, title);
// One Chapter
hb_chapter_t * chapter;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
chapter->index = 1;
chapter->duration = title->duration;
chapter->hours = title->hours;
chapter->minutes = title->minutes;
chapter->seconds = title->seconds;
hb_list_add( title->list_chapter, chapter );
if ( stream->has_IDRs < 1 )
{
hb_log( "stream doesn't seem to have video IDR frames" );
title->flags |= HBTF_NO_IDR;
}
if ( stream->hb_stream_type == transport &&
( stream->ts_flags & TS_HAS_PCR ) == 0 )
{
hb_log( "transport stream missing PCRs - using video DTS instead" );
}
// Height, width, rate and aspect ratio information is filled in
// when the previews are built
return title;
}
/*
* read the next transport stream packet from 'stream'. Return NULL if
* we hit eof & a pointer to the sync byte otherwise.
*/
static const uint8_t *next_packet( hb_stream_t *stream )
{
uint8_t *buf = stream->ts.packet + stream->packetsize - 188;
while ( 1 )
{
if ( fread(stream->ts.packet, 1, stream->packetsize, stream->file_handle) !=
stream->packetsize )
{
return NULL;
}
if (buf[0] == 0x47)
{
return buf;
}
// lost sync - back up to where we started then try to re-establish.
off_t pos = ftello(stream->file_handle) - stream->packetsize;
off_t pos2 = align_to_next_packet(stream);
if ( pos2 == 0 )
{
hb_log( "next_packet: eof while re-establishing sync @ %"PRId64, pos );
return NULL;
}
ts_warn( stream, "next_packet: sync lost @ %"PRId64", regained after %"PRId64" bytes",
pos, pos2 );
}
}
/*
* skip to the start of the next PACK header in program stream src_stream.
*/
static void skip_to_next_pack( hb_stream_t *src_stream )
{
// scan forward until we find the start of the next pack
uint32_t strt_code = -1;
int c;
flockfile( src_stream->file_handle );
while ( ( c = getc_unlocked( src_stream->file_handle ) ) != EOF )
{
strt_code = ( strt_code << 8 ) | c;
if ( strt_code == 0x000001ba )
// we found the start of the next pack
break;
}
funlockfile( src_stream->file_handle );
// if we didn't terminate on an eof back up so the next read
// starts on the pack boundary.
if ( c != EOF )
{
fseeko( src_stream->file_handle, -4, SEEK_CUR );
}
}
static void CreateDecodedNAL( uint8_t **dst, int *dst_len,
const uint8_t *src, int src_len )
{
const uint8_t *end = &src[src_len];
uint8_t *d = malloc( src_len );
*dst = d;
if( d )
{
while( src < end )
{
if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
src[2] == 0x01 )
{
// Next start code found
break;
}
if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
src[2] == 0x03 )
{
*d++ = 0x00;
*d++ = 0x00;
src += 3;
continue;
}
*d++ = *src++;
}
}
*dst_len = d - *dst;
}
static int isRecoveryPoint( const uint8_t *buf, int len )
{
uint8_t *nal;
int nal_len;
int ii, type, size, start;
int recovery_frames = 0;
CreateDecodedNAL( &nal, &nal_len, buf, len );
for ( ii = 0; ii+1 < nal_len; )
{
start = ii;
type = 0;
while ( ii+1 < nal_len )
{
type += nal[ii++];
if ( nal[ii-1] != 0xff )
break;
}
size = 0;
while ( ii+1 < nal_len )
{
size += nal[ii++];
if ( nal[ii-1] != 0xff )
break;
}
if ( ii + size + 1 > nal_len )
{
// Is it an SEI recovery point?
if ( type == 6 )
{
// Recovery point found, but can't parse the entire NAL.
// So return an arbitrary recovery_frames count.
recovery_frames = 3;
}
break;
}
// Is it an SEI recovery point?
if ( type == 6 )
{
bitbuf_t bb;
bits_init(&bb, nal+ii, size, 0);
int count = bits_read_ue( &bb );
recovery_frames = count + 3;
break;
}
ii += size;
}
free( nal );
return recovery_frames;
}
static int isIframe( hb_stream_t *stream, const uint8_t *buf, int len )
{
// For mpeg2: look for a gop start or i-frame picture start
// for h.264: look for idr nal type or a slice header for an i-frame
// for vc1: look for a Sequence header
int ii;
uint32_t strid = 0;
int vid = pes_index_of_video( stream );
hb_pes_stream_t *pes = &stream->pes.list[vid];
if ( pes->stream_type <= 2 ||
pes->codec_param == CODEC_ID_MPEG1VIDEO ||
pes->codec_param == CODEC_ID_MPEG2VIDEO )
{
// This section of the code handles MPEG-1 and MPEG-2 video streams
for (ii = 0; ii < len; ii++)
{
strid = (strid << 8) | buf[ii];
if ( ( strid >> 8 ) == 1 )
{
// we found a start code
uint8_t id = strid;
switch ( id )
{
case 0xB8: // group_start_code (GOP header)
case 0xB3: // sequence_header code
return 1;
case 0x00: // picture_start_code
// picture_header, let's see if it's an I-frame
if (ii < len - 3)
{
// check if picture_coding_type == 1
if ((buf[ii+2] & (0x7 << 3)) == (1 << 3))
{
// found an I-frame picture
return 1;
}
}
break;
}
}
}
// didn't find an I-frame
return 0;
}
if ( pes->stream_type == 0x1b || pes->codec_param == CODEC_ID_H264 )
{
// we have an h.264 stream
for (ii = 0; ii < len; ii++)
{
strid = (strid << 8) | buf[ii];
if ( ( strid >> 8 ) == 1 )
{
// we found a start code - remove the ref_idc from the nal type
uint8_t nal_type = strid & 0x1f;
if ( nal_type == 0x05 )
{
// h.264 IDR picture start
return 1;
}
else if ( nal_type == 0x06 )
{
int off = ii + 1;
int recovery_frames = isRecoveryPoint( buf+off, len-off );
if ( recovery_frames )
{
return recovery_frames;
}
}
}
}
// didn't find an I-frame
return 0;
}
if ( pes->stream_type == 0xea || pes->codec_param == CODEC_ID_VC1 )
{
// we have an vc1 stream
for (ii = 0; ii < len; ii++)
{
strid = (strid << 8) | buf[ii];
if ( strid == 0x10f )
{
// the ffmpeg vc1 decoder requires a seq hdr code in the first
// frame.
return 1;
}
}
// didn't find an I-frame
return 0;
}
// we don't understand the stream type so just say "yes" otherwise
// we'll discard all the video.
return 1;
}
static int ts_isIframe( hb_stream_t *stream, const uint8_t *buf, int adapt_len )
{
return isIframe( stream, buf + 13 + adapt_len, 188 - ( 13 + adapt_len ) );
}
/*
* scan the next MB of 'stream' to find the next start packet for
* the Packetized Elementary Stream associated with TS PID 'pid'.
*/
static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid, int *out_adapt_len)
{
int npack = 300000; // max packets to read
while (--npack >= 0)
{
const uint8_t *buf = next_packet( stream );
if ( buf == NULL )
{
hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
return 0;
}
// while we're reading the stream, check if it has valid PCRs
// and/or random access points.
uint32_t pack_pid = ( (buf[1] & 0x1f) << 8 ) | buf[2];
if ( pack_pid == stream->pmt_info.PCR_PID )
{
if ( ( buf[5] & 0x10 ) &&
( ( ( buf[3] & 0x30 ) == 0x20 ) ||
( ( buf[3] & 0x30 ) == 0x30 && buf[4] > 6 ) ) )
{
stream->ts_flags |= TS_HAS_PCR;
}
}
if ( buf[5] & 0x40 )
{
stream->ts_flags |= TS_HAS_RAP;
}
/*
* The PES header is only in TS packets with 'start' set so we check
* that first then check for the right PID.
*/
if ((buf[1] & 0x40) == 0 || pack_pid != pid )
{
// not a start packet or not the pid we want
continue;
}
int adapt_len = 0;
/* skip over the TS hdr to return a pointer to the PES hdr */
switch (buf[3] & 0x30)
{
case 0x00: // illegal
case 0x20: // fill packet
continue;
case 0x30: // adaptation
adapt_len = buf[4] + 1;
if (adapt_len > 184)
{
hb_log("hb_ts_stream_getPEStype: invalid adaptation field length %d for PID 0x%x", buf[4], pid);
continue;
}
break;
}
/* PES hdr has to begin with an mpeg start code */
if (buf[adapt_len+4] == 0x00 && buf[adapt_len+5] == 0x00 && buf[adapt_len+6] == 0x01)
{
*out_adapt_len = adapt_len;
return buf;
}
}
/* didn't find it */
return 0;
}
static hb_buffer_t * hb_ps_stream_getVideo(
hb_stream_t *stream,
hb_pes_info_t *pi)
{
hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
hb_pes_info_t pes_info;
// how many blocks we read while searching for a video PES header
int blksleft = 2048;
while (--blksleft >= 0)
{
buf->size = 0;
int len = hb_ps_read_packet( stream, buf );
if ( len == 0 )
{
// EOF
break;
}
if ( !hb_parse_ps( stream, buf->data, buf->size, &pes_info ) )
continue;
int idx;
if ( pes_info.stream_id == 0xbd )
{
idx = index_of_ps_stream( stream, pes_info.stream_id,
pes_info.bd_substream_id );
}
else
{
idx = index_of_ps_stream( stream, pes_info.stream_id,
pes_info.stream_id_ext );
}
if ( stream->pes.list[idx].stream_kind == V )
{
if ( pes_info.pts != -1 )
{
*pi = pes_info;
return buf;
}
}
}
hb_buffer_close( &buf );
return NULL;
}
/***********************************************************************
* hb_stream_duration
***********************************************************************
*
* Finding stream duration is difficult. One issue is that the video file
* may have chunks from several different program fragments (main feature,
* commercials, station id, trailers, etc.) all with their own base pts
* value. We can't find the piece boundaries without reading the entire
* file but if we compute a rate based on time stamps from two different
* pieces the result will be meaningless. The second issue is that the
* data rate of compressed video normally varies by 5-10x over the length
* of the video. This says that we want to compute the rate over relatively
* long segments to get a representative average but long segments increase
* the likelihood that we'll cross a piece boundary.
*
* What we do is take time stamp samples at several places in the file
* (currently 16) then compute the average rate (i.e., ticks of video per
* byte of the file) for all pairs of samples (N^2 rates computed for N
* samples). Some of those rates will be absurd because the samples came
* from different segments. Some will be way low or high because the
* samples came from a low or high motion part of the segment. But given
* that we're comparing *all* pairs the majority of the computed rates
* should be near the overall average. So we median filter the computed
* rates to pick the most representative value.
*
**********************************************************************/
struct pts_pos {
uint64_t pos; /* file position of this PTS sample */
uint64_t pts; /* PTS from video stream */
};
#define NDURSAMPLES 128
// get one (position, timestamp) sampple from a transport or program
// stream.
static struct pts_pos hb_sample_pts(hb_stream_t *stream, uint64_t fpos)
{
struct pts_pos pp = { 0, 0 };
if ( stream->hb_stream_type == transport )
{
const uint8_t *buf;
int adapt_len;
fseeko( stream->file_handle, fpos, SEEK_SET );
align_to_next_packet( stream );
int pid = stream->ts.list[ts_index_of_video(stream)].pid;
buf = hb_ts_stream_getPEStype( stream, pid, &adapt_len );
if ( buf == NULL )
{
hb_log("hb_sample_pts: couldn't find video packet near %"PRIu64, fpos);
return pp;
}
const uint8_t *pes = buf + 4 + adapt_len;
if ( ( pes[7] >> 7 ) != 1 )
{
hb_log("hb_sample_pts: no PTS in video packet near %"PRIu64, fpos);
return pp;
}
pp.pts = ( ( (uint64_t)pes[9] >> 1 ) & 7 << 30 ) |
( (uint64_t)pes[10] << 22 ) |
( ( (uint64_t)pes[11] >> 1 ) << 15 ) |
( (uint64_t)pes[12] << 7 ) |
( (uint64_t)pes[13] >> 1 );
if ( ts_isIframe( stream, buf, adapt_len ) )
{
if ( stream->has_IDRs < 255 )
{
++stream->has_IDRs;
}
}
pp.pos = ftello(stream->file_handle);
if ( !stream->has_IDRs )
{
// Scan a little more to see if we will stumble upon one
int ii;
for ( ii = 0; ii < 10; ii++ )
{
buf = hb_ts_stream_getPEStype( stream, pid, &adapt_len );
if ( buf == NULL )
break;
if ( ts_isIframe( stream, buf, adapt_len ) )
{
++stream->has_IDRs;
break;
}
}
}
}
else
{
hb_buffer_t *buf;
hb_pes_info_t pes_info;
// round address down to nearest dvd sector start
fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
fseeko( stream->file_handle, fpos, SEEK_SET );
if ( stream->hb_stream_type == program )
{
skip_to_next_pack( stream );
}
buf = hb_ps_stream_getVideo( stream, &pes_info );
if ( buf == NULL )
{
hb_log("hb_sample_pts: couldn't find video packet near %"PRIu64, fpos);
return pp;
}
if ( pes_info.pts < 0 )
{
hb_log("hb_sample_pts: no PTS in video packet near %"PRIu64, fpos);
hb_buffer_close( &buf );
return pp;
}
if ( isIframe( stream, buf->data, buf->size ) )
{
if ( stream->has_IDRs < 255 )
{
++stream->has_IDRs;
}
}
hb_buffer_close( &buf );
if ( !stream->has_IDRs )
{
// Scan a little more to see if we will stumble upon one
int ii;
for ( ii = 0; ii < 10; ii++ )
{
buf = hb_ps_stream_getVideo( stream, &pes_info );
if ( buf == NULL )
break;
if ( isIframe( stream, buf->data, buf->size ) )
{
++stream->has_IDRs;
hb_buffer_close( &buf );
break;
}
hb_buffer_close( &buf );
}
}
pp.pts = pes_info.pts;
pp.pos = ftello(stream->file_handle);
}
return pp;
}
static int dur_compare( const void *a, const void *b )
{
const double *aval = a, *bval = b;
return ( *aval < *bval ? -1 : ( *aval == *bval ? 0 : 1 ) );
}
// given an array of (position, time) samples, compute a max-likelihood
// estimate of the average rate by computing the rate between all pairs
// of samples then taking the median of those rates.
static double compute_stream_rate( struct pts_pos *pp, int n )
{
int i, j;
double rates[NDURSAMPLES * NDURSAMPLES / 8];
double *rp = rates;
// the following nested loops compute the rates between all pairs.
*rp = 0;
for ( i = 0; i < n-1; ++i )
{
// Bias the median filter by not including pairs that are "far"
// from one another. This is to handle cases where the file is
// made of roughly equal size pieces where a symmetric choice of
// pairs results in having the same number of intra-piece &
// inter-piece rate estimates. This would mean that the median
// could easily fall in the inter-piece part of the data which
// would give a bogus estimate. The 'ns' index creates an
// asymmetry that favors locality.
int ns = i + ( n >> 3 );
if ( ns > n )
ns = n;
for ( j = i+1; j < ns; ++j )
{
if ( (uint64_t)(pp[j].pts - pp[i].pts) > 90000LL*3600*6 )
break;
if ( pp[j].pts != pp[i].pts && pp[j].pos > pp[i].pos )
{
*rp = ((double)( pp[j].pts - pp[i].pts )) /
((double)( pp[j].pos - pp[i].pos ));
++rp;
}
}
}
// now compute and return the median of all the (n*n/2) rates we computed
// above.
int nrates = rp - rates;
qsort( rates, nrates, sizeof (rates[0] ), dur_compare );
return rates[nrates >> 1];
}
static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
{
struct pts_pos ptspos[NDURSAMPLES];
struct pts_pos *pp = ptspos;
int i;
fseeko(stream->file_handle, 0, SEEK_END);
uint64_t fsize = ftello(stream->file_handle);
uint64_t fincr = fsize / NDURSAMPLES;
uint64_t fpos = fincr / 2;
for ( i = NDURSAMPLES; --i >= 0; fpos += fincr )
{
*pp++ = hb_sample_pts(stream, fpos);
}
uint64_t dur = compute_stream_rate( ptspos, pp - ptspos ) * (double)fsize;
inTitle->duration = dur;
dur /= 90000;
inTitle->hours = dur / 3600;
inTitle->minutes = ( dur % 3600 ) / 60;
inTitle->seconds = dur % 60;
rewind(stream->file_handle);
}
/***********************************************************************
* hb_stream_read
***********************************************************************
*
**********************************************************************/
hb_buffer_t * hb_stream_read( hb_stream_t * src_stream )
{
if ( src_stream->hb_stream_type == ffmpeg )
{
return hb_ffmpeg_read( src_stream );
}
if ( src_stream->hb_stream_type == program )
{
return hb_ps_stream_decode( src_stream );
}
return hb_ts_stream_decode( src_stream );
}
int64_t ffmpeg_initial_timestamp( hb_stream_t * stream )
{
AVFormatContext *ic = stream->ffmpeg_info_ic;
if ( ic->start_time != AV_NOPTS_VALUE && ic->start_time > 0 )
return ic->start_time;
else
return 0;
}
int hb_stream_seek_chapter( hb_stream_t * stream, int chapter_num )
{
if ( stream->hb_stream_type != ffmpeg )
{
// currently meaningliess for transport and program streams
return 1;
}
if ( !stream || !stream->title ||
chapter_num > hb_list_count( stream->title->list_chapter ) )
{
return 0;
}
int64_t sum_dur = 0;
hb_chapter_t *chapter = NULL;
int i;
for ( i = 0; i < chapter_num; ++i)
{
chapter = hb_list_item( stream->title->list_chapter, i );
sum_dur += chapter->duration;
}
stream->chapter = chapter_num - 1;
stream->chapter_end = sum_dur;
int64_t pos = ( ( ( sum_dur - chapter->duration ) * AV_TIME_BASE ) / 90000 ) + ffmpeg_initial_timestamp( stream );
hb_deep_log( 2, "Seeking to chapter %d: starts %"PRId64", ends %"PRId64", AV pos %"PRId64,
chapter_num, sum_dur - chapter->duration, sum_dur, pos);
if ( chapter_num > 1 && pos > 0 )
{
AVStream *st = stream->ffmpeg_info_ic->streams[stream->ffmpeg_video_id];
// timebase must be adjusted to match timebase of stream we are
// using for seeking.
pos = av_rescale(pos, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
avformat_seek_file( stream->ffmpeg_reader_ic, stream->ffmpeg_video_id, 0, pos, pos, AVSEEK_FLAG_BACKWARD);
}
return 1;
}
/***********************************************************************
* hb_stream_chapter
***********************************************************************
* Return the number of the chapter that we are currently in. We store
* the chapter number starting from 0, so + 1 for the real chpater num.
**********************************************************************/
int hb_stream_chapter( hb_stream_t * src_stream )
{
return( src_stream->chapter + 1 );
}
/***********************************************************************
* hb_stream_seek
***********************************************************************
*
**********************************************************************/
int hb_stream_seek( hb_stream_t * stream, float f )
{
if ( stream->hb_stream_type == ffmpeg )
{
return ffmpeg_seek( stream, f );
}
off_t stream_size, cur_pos, new_pos;
double pos_ratio = f;
cur_pos = ftello( stream->file_handle );
fseeko( stream->file_handle, 0, SEEK_END );
stream_size = ftello( stream->file_handle );
new_pos = (off_t) ((double) (stream_size) * pos_ratio);
new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
int r = fseeko( stream->file_handle, new_pos, SEEK_SET );
if (r == -1)
{
fseeko( stream->file_handle, cur_pos, SEEK_SET );
return 0;
}
if ( stream->hb_stream_type == transport )
{
// We need to drop the current decoder output and move
// forwards to the next transport stream packet.
hb_ts_stream_reset(stream);
align_to_next_packet(stream);
if ( stream->has_IDRs )
{
// the stream has IDRs so look for one.
stream->need_keyframe = 1;
}
}
else if ( stream->hb_stream_type == program )
{
hb_ps_stream_reset(stream);
skip_to_next_pack( stream );
if ( stream->has_IDRs )
{
// the stream has IDRs so look for one.
stream->need_keyframe = 1;
}
}
return 1;
}
int hb_stream_seek_ts( hb_stream_t * stream, int64_t ts )
{
if ( stream->hb_stream_type == ffmpeg )
{
return ffmpeg_seek_ts( stream, ts );
}
return -1;
}
static char* strncpyupper( char *dst, const char *src, int len )
{
int ii;
for ( ii = 0; ii < len-1 && src[ii]; ii++ )
{
dst[ii] = islower(src[ii]) ? toupper(src[ii]) : src[ii];
}
dst[ii] = '\0';
return dst;
}
static const char *stream_type_name2(hb_stream_t *stream, hb_pes_stream_t *pes)
{
static char codec_name_caps[80];
if ( stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// Names for streams we know about.
switch ( pes->stream_type )
{
case 0x80:
return "BD LPCM";
case 0x83:
return "TrueHD";
case 0x84:
return "E-AC3";
case 0x85:
return "DTS-HD HRA";
case 0x86:
return "DTS-HD MA";
default:
break;
}
}
if ( st2codec[pes->stream_type].name )
{
return st2codec[pes->stream_type].name;
}
if ( pes->codec_name[0] != 0 )
{
return pes->codec_name;
}
if ( pes->codec & HB_ACODEC_FF_MASK )
{
AVCodec * codec = avcodec_find_decoder( pes->codec_param );
if ( codec && codec->name && codec->name[0] )
{
strncpyupper( codec_name_caps, codec->name, 80 );
return codec_name_caps;
}
}
return "Unknown";
}
static const char *stream_type_name (uint32_t reg_desc, uint8_t stream_type)
{
if ( reg_desc == STR4_TO_UINT32("HDMV") )
{
// Names for streams we know about.
switch ( stream_type )
{
case 0x80:
return "BD LPCM";
case 0x83:
return "TrueHD";
case 0x84:
return "E-AC3";
case 0x85:
return "DTS-HD HRA";
case 0x86:
return "DTS-HD MA";
default:
break;
}
}
return st2codec[stream_type].name ? st2codec[stream_type].name : "Unknown";
}
static void set_audio_description(
hb_stream_t * stream,
hb_audio_t *audio,
iso639_lang_t *lang)
{
int idx;
const char *codec_name;
char codec_name_caps[80];
AVCodecContext *cc = NULL;
if ( stream && stream->ffmpeg_info_ic )
{
cc = stream->ffmpeg_info_ic->streams[audio->id]->codec;
}
// Names for streams we know about.
if ( audio->config.in.stream_type == 0x80 &&
audio->config.in.reg_desc == STR4_TO_UINT32("HDMV") )
{
// LPCM audio in bluray have an stype of 0x80
codec_name = "BD LPCM";
}
else if ( audio->config.in.stream_type == 0x83 &&
audio->config.in.reg_desc == STR4_TO_UINT32("HDMV") )
{
// This is an interleaved TrueHD/AC-3 stream and the esid of
// the AC-3 is 0x76
if (audio->config.in.substream_type == HB_SUBSTREAM_BD_AC3)
codec_name = "AC3";
else
codec_name = "TrueHD";
}
else if ( audio->config.in.stream_type == 0x86 &&
audio->config.in.reg_desc == STR4_TO_UINT32("HDMV") )
{
// This is an interleaved DTS-HD MA/DTS stream and the
// esid of the DTS is 0x71
if (audio->config.in.substream_type == HB_SUBSTREAM_BD_DTS)
codec_name = "DTS";
else
codec_name = "DTS-HD MA";
}
else if ( audio->config.in.stream_type == 0x85 &&
audio->config.in.reg_desc == STR4_TO_UINT32("HDMV") )
{
// DTS-HD HRA audio in bluray has an stype of 0x85
// which conflicts with ATSC Program ID
// To distinguish, Bluray streams have a reg_desc of HDMV
// This is an interleaved DTS-HD HRA/DTS stream and the
// esid of the DTS is 0x71
if (audio->config.in.substream_type == HB_SUBSTREAM_BD_DTS)
codec_name = "DTS";
else
codec_name = "DTS-HD HRA";
}
else if ( audio->config.in.stream_type == 0x84 &&
audio->config.in.reg_desc == STR4_TO_UINT32("HDMV") )
{
// EAC3 audio in bluray has an stype of 0x84
// which conflicts with SDDS
// To distinguish, Bluray streams have a reg_desc of HDMV
codec_name = "E-AC3";
}
// For streams demuxed and decoded by ffmpeg, we have a cached context.
// Use it to get the name and profile information. Obtaining
// the profile requires that ffmpeg has already probed the stream.
else if ( ( audio->config.in.codec & HB_ACODEC_FF_MASK ) && cc &&
avcodec_find_decoder( cc->codec_id ) )
{
AVCodec *codec = avcodec_find_decoder( cc->codec_id );
codec_name = codec->name;
const char *profile_name;
profile_name = av_get_profile_name( codec, cc->profile );
if ( profile_name )
{
codec_name = profile_name;
}
}
else if ( stream->hb_stream_type != ffmpeg &&
(idx = index_of_id( stream, audio->id ) ) >= 0 )
{
codec_name = stream_type_name2( stream, &stream->pes.list[idx] );
}
else if ( st2codec[audio->config.in.stream_type].kind == A )
{
codec_name = stream_type_name(audio->config.in.reg_desc,
audio->config.in.stream_type);
}
// For streams demuxed by us and decoded by ffmpeg, we can lookup the
// decoder name.
else if ( ( audio->config.in.codec & HB_ACODEC_FF_MASK ) &&
avcodec_find_decoder( audio->config.in.codec_param ) )
{
codec_name = avcodec_find_decoder( audio->config.in.codec_param )->name;
strncpyupper( codec_name_caps, codec_name, 80 );
codec_name = codec_name_caps;
}
else
{
codec_name = audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" :
audio->config.in.codec == HB_ACODEC_DCA ? "DTS" :
audio->config.in.codec == HB_ACODEC_DCA_HD ? "DTS-HD" :
audio->config.in.codec == HB_ACODEC_LPCM ? "LPCM" :
(audio->config.in.codec & HB_ACODEC_FF_MASK) ? "FFmpeg" :
"Unknown";
}
snprintf( audio->config.lang.description,
sizeof( audio->config.lang.description ), "%s (%s)",
strlen(lang->native_name) ? lang->native_name : lang->eng_name,
codec_name );
if ( audio->config.in.channel_layout )
{
int layout = audio->config.in.channel_layout;
char *desc = audio->config.lang.description +
strlen( audio->config.lang.description );
sprintf( desc, " (%d.%d ch)",
HB_INPUT_CH_LAYOUT_GET_DISCRETE_FRONT_COUNT(layout) +
HB_INPUT_CH_LAYOUT_GET_DISCRETE_REAR_COUNT(layout),
HB_INPUT_CH_LAYOUT_GET_DISCRETE_LFE_COUNT(layout) );
}
snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
strlen(lang->native_name) ? lang->native_name : lang->eng_name );
snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ),
"%s", lang->iso639_2);
}
// Sort specifies the index in the audio list where you would
// like sorted items to begin.
static void pes_add_audio_to_title(
hb_stream_t *stream,
int idx,
hb_title_t *title,
int sort)
{
hb_pes_stream_t *pes = &stream->pes.list[idx];
// Sort by id when adding to the list
// This assures that they are always displayed in the same order
int id = get_id( pes );
int i;
hb_audio_t *tmp = NULL;
int count = hb_list_count( title->list_audio );
// Don't add the same audio twice. Search for audio.
for ( i = 0; i < count; i++ )
{
tmp = hb_list_item( title->list_audio, i );
if ( id == tmp->id )
return;
}
hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
audio->id = id;
audio->config.in.reg_desc = stream->reg_desc;
audio->config.in.stream_type = pes->stream_type;
audio->config.in.substream_type = pes->stream_id_ext;
audio->config.in.codec = pes->codec;
audio->config.in.codec_param = pes->codec_param;
set_audio_description( stream, audio, lang_for_code( pes->lang_code ) );
hb_log("stream id 0x%x (type 0x%x substream 0x%x) audio 0x%x",
pes->stream_id, pes->stream_type, pes->stream_id_ext, audio->id);
audio->config.in.track = idx;
// Search for the sort position
if ( sort >= 0 )
{
sort = sort < count ? sort : count;
for ( i = sort; i < count; i++ )
{
tmp = hb_list_item( title->list_audio, i );
int sid = tmp->id & 0xffff;
int ssid = tmp->id >> 16;
if ( pes->stream_id < sid )
break;
else if ( pes->stream_id <= sid &&
pes->stream_id_ext <= ssid )
{
break;
}
}
hb_list_insert( title->list_audio, i, audio );
}
else
{
hb_list_add( title->list_audio, audio );
}
}
static void hb_init_audio_list(hb_stream_t *stream, hb_title_t *title)
{
int ii;
int map_idx;
int largest = -1;
// First add all that were found in a map.
for ( map_idx = 0; 1; map_idx++ )
{
for ( ii = 0; ii < stream->pes.count; ii++ )
{
if ( stream->pes.list[ii].stream_kind == A )
{
if ( stream->pes.list[ii].map_idx == map_idx )
{
pes_add_audio_to_title( stream, ii, title, -1 );
}
if ( stream->pes.list[ii].map_idx > largest )
largest = stream->pes.list[ii].map_idx;
}
}
if ( map_idx > largest )
break;
}
int count = hb_list_count( title->list_audio );
// Now add the reset. Sort them by stream id.
for ( ii = 0; ii < stream->pes.count; ii++ )
{
if ( stream->pes.list[ii].stream_kind == A )
{
pes_add_audio_to_title( stream, ii, title, count );
}
}
}
/***********************************************************************
* hb_ts_stream_init
***********************************************************************
*
**********************************************************************/
static void hb_ts_stream_init(hb_stream_t *stream)
{
int i;
if ( stream->ts.list )
{
for (i=0; i < stream->ts.alloc; i++)
{
stream->ts.list[i].continuity = -1;
stream->ts.list[i].pid = -1;
stream->ts.list[i].pes_list = -1;
}
}
stream->ts.count = 0;
if ( stream->pes.list )
{
for (i=0; i < stream->pes.alloc; i++)
{
stream->pes.list[i].stream_id = -1;
stream->pes.list[i].next = -1;
}
}
stream->pes.count = 0;
stream->ts.packet = malloc( stream->packetsize );
// Find the audio and video pids in the stream
hb_ts_stream_find_pids(stream);
// hb_ts_resolve_pid_types reads some data, so the TS buffers
// are needed here.
for (i = 0; i < stream->ts.count; i++)
{
// demuxing buffer for TS to PS conversion
stream->ts.list[i].buf = hb_buffer_init(stream->packetsize);
stream->ts.list[i].extra_buf = hb_buffer_init(stream->packetsize);
stream->ts.list[i].buf->size = 0;
stream->ts.list[i].extra_buf->size = 0;
}
hb_ts_resolve_pid_types(stream);
hb_log("Found the following PIDS");
hb_log(" Video PIDS : ");
for (i=0; i < stream->ts.count; i++)
{
if ( ts_stream_kind( stream, i ) == V )
{
hb_log( " 0x%x type %s (0x%x)%s",
stream->ts.list[i].pid,
stream_type_name2(stream,
&stream->pes.list[stream->ts.list[i].pes_list]),
ts_stream_type( stream, i ),
stream->ts.list[i].is_pcr ? " (PCR)" : "");
}
}
hb_log(" Audio PIDS : ");
for (i = 0; i < stream->ts.count; i++)
{
if ( ts_stream_kind( stream, i ) == A )
{
hb_log( " 0x%x type %s (0x%x)%s",
stream->ts.list[i].pid,
stream_type_name2(stream,
&stream->pes.list[stream->ts.list[i].pes_list]),
ts_stream_type( stream, i ),
stream->ts.list[i].is_pcr ? " (PCR)" : "");
}
}
hb_log(" Other PIDS : ");
for (i = 0; i < stream->ts.count; i++)
{
if ( ts_stream_kind( stream, i ) == N ||
ts_stream_kind( stream, i ) == P )
{
hb_log( " 0x%x type %s (0x%x)%s",
stream->ts.list[i].pid,
stream_type_name2(stream,
&stream->pes.list[stream->ts.list[i].pes_list]),
ts_stream_type( stream, i ),
stream->ts.list[i].is_pcr ? " (PCR)" : "");
}
}
}
static void hb_ps_stream_init(hb_stream_t *stream)
{
int i;
if ( stream->pes.list )
{
for (i=0; i < stream->pes.alloc; i++)
{
stream->pes.list[i].stream_id = -1;
stream->pes.list[i].next = -1;
}
}
stream->pes.count = 0;
// Find the audio and video pids in the stream
hb_ps_stream_find_streams(stream);
hb_ps_resolve_stream_types(stream);
hb_log("Found the following streams");
hb_log(" Video Streams : ");
for (i=0; i < stream->pes.count; i++)
{
if ( stream->pes.list[i].stream_kind == V )
{
hb_log( " 0x%x-0x%x type %s (0x%x)",
stream->pes.list[i].stream_id,
stream->pes.list[i].stream_id_ext,
stream_type_name2(stream,
&stream->pes.list[i]),
stream->pes.list[i].stream_type);
}
}
hb_log(" Audio Streams : ");
for (i = 0; i < stream->pes.count; i++)
{
if ( stream->pes.list[i].stream_kind == A )
{
hb_log( " 0x%x-0x%x type %s (0x%x)",
stream->pes.list[i].stream_id,
stream->pes.list[i].stream_id_ext,
stream_type_name2(stream,
&stream->pes.list[i]),
stream->pes.list[i].stream_type );
}
}
hb_log(" Other Streams : ");
for (i = 0; i < stream->pes.count; i++)
{
if ( stream->pes.list[i].stream_kind == N )
{
hb_log( " 0x%x-0x%x type %s (0x%x)",
stream->pes.list[i].stream_id,
stream->pes.list[i].stream_id_ext,
stream_type_name2(stream,
&stream->pes.list[i]),
stream->pes.list[i].stream_type );
}
}
}
#define MAX_HOLE 208*80
static off_t align_to_next_packet(hb_stream_t *stream)
{
uint8_t buf[MAX_HOLE];
off_t pos = 0;
off_t start = ftello(stream->file_handle);
off_t orig;
if ( start >= stream->packetsize ) {
start -= stream->packetsize;
fseeko(stream->file_handle, start, SEEK_SET);
}
orig = start;
while (1)
{
if (fread(buf, sizeof(buf), 1, stream->file_handle) == 1)
{
const uint8_t *bp = buf;
int i;
for ( i = sizeof(buf) - 8 * stream->packetsize; --i >= 0; ++bp )
{
if ( have_ts_sync( bp, stream->packetsize, 8 ) )
{
break;
}
}
if ( i >= 0 )
{
pos = ( bp - buf ) - stream->packetsize + 188;
break;
}
fseeko(stream->file_handle, -8 * stream->packetsize, SEEK_CUR);
start = ftello(stream->file_handle);
}
else
{
return 0;
}
}
fseeko(stream->file_handle, start+pos, SEEK_SET);
return start - orig + pos;
}
static const unsigned int bitmask[] = {
0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0xff,
0x1ff,0x3ff,0x7ff,0xfff,0x1fff,0x3fff,0x7fff,0xffff,
0x1ffff,0x3ffff,0x7ffff,0xfffff,0x1fffff,0x3fffff,0x7fffff,0xffffff,
0x1ffffff,0x3ffffff,0x7ffffff,0xfffffff,0x1fffffff,0x3fffffff,0x7fffffff,0xffffffff};
static inline void bits_init(bitbuf_t *bb, uint8_t* buf, int bufsize, int clear)
{
bb->pos = 0;
bb->buf = buf;
bb->size = bufsize;
bb->val = (bb->buf[0] << 24) | (bb->buf[1] << 16) |
(bb->buf[2] << 8) | bb->buf[3];
if (clear)
memset(bb->buf, 0, bufsize);
bb->size = bufsize;
}
static inline void bits_clone( bitbuf_t *dst, bitbuf_t *src, int bufsize )
{
*dst = *src;
dst->size = (dst->pos >> 3) + bufsize;
}
static inline int bits_bytes_left(bitbuf_t *bb)
{
return bb->size - (bb->pos >> 3);
}
static inline int bits_eob(bitbuf_t *bb)
{
return bb->pos >> 3 == bb->size;
}
static inline unsigned int bits_peek(bitbuf_t *bb, int bits)
{
unsigned int val;
int left = 32 - (bb->pos & 31);
if (bits < left)
{
val = (bb->val >> (left - bits)) & bitmask[bits];
}
else
{
val = (bb->val & bitmask[left]) << (bits - left);
int bpos = bb->pos + left;
bits -= left;
if (bits > 0)
{
int pos = bpos >> 3;
int bval = (bb->buf[pos] << 24) |
(bb->buf[pos + 1] << 16) |
(bb->buf[pos + 2] << 8) |
bb->buf[pos + 3];
val |= (bval >> (32 - bits)) & bitmask[bits];
}
}
return val;
}
static inline unsigned int bits_get(bitbuf_t *bb, int bits)
{
unsigned int val;
int left = 32 - (bb->pos & 31);
if (bits < left)
{
val = (bb->val >> (left - bits)) & bitmask[bits];
bb->pos += bits;
}
else
{
val = (bb->val & bitmask[left]) << (bits - left);
bb->pos += left;
bits -= left;
int pos = bb->pos >> 3;
bb->val = (bb->buf[pos] << 24) | (bb->buf[pos + 1] << 16) | (bb->buf[pos + 2] << 8) | bb->buf[pos + 3];
if (bits > 0)
{
val |= (bb->val >> (32 - bits)) & bitmask[bits];
bb->pos += bits;
}
}
return val;
}
static inline int bits_read_ue(bitbuf_t *bb )
{
int ii = 0;
while( bits_get( bb, 1 ) == 0 && !bits_eob( bb ) && ii < 32 )
{
ii++;
}
return( ( 1 << ii) - 1 + bits_get( bb, ii ) );
}
static inline int bits_skip(bitbuf_t *bb, int bits)
{
if (bits <= 0)
return 0;
while (bits > 32)
{
bits_get(bb, 32);
bits -= 32;
}
bits_get(bb, bits);
return 0;
}
// extract what useful information we can from the elementary stream
// descriptor list at 'dp' and add it to the stream at 'esindx'.
// Descriptors with info we don't currently use are ignored.
// The descriptor list & descriptor item formats are defined in
// ISO 13818-1 (2000E) section 2.6 (pg. 62).
static void decode_element_descriptors(
hb_stream_t *stream,
int pes_idx,
bitbuf_t *bb)
{
int ii;
while( bits_bytes_left( bb ) > 2 )
{
uint8_t tag = bits_get(bb, 8);
uint8_t len = bits_get(bb, 8);
switch ( tag )
{
case 5: // Registration descriptor
stream->pes.list[pes_idx].format_id = bits_get(bb, 32);
bits_skip(bb, 8 * (len - 4));
break;
case 10: // ISO_639_language descriptor
{
char code[3];
for (ii = 0; ii < 3; ii++)
{
code[ii] = bits_get(bb, 8);
}
stream->pes.list[pes_idx].lang_code =
lang_to_code(lang_for_code2(code));
bits_skip(bb, 8 * (len - 3));
} break;
case 0x56: // DVB Teletext descriptor
{
// We don't currently process teletext from
// TS or PS streams. Set stream 'kind' to N
stream->pes.list[pes_idx].stream_type = 0x00;
stream->pes.list[pes_idx].stream_kind = N;
strncpy(stream->pes.list[pes_idx].codec_name,
"DVB Teletext", 80);
bits_skip(bb, 8 * len);
} break;
case 0x59: // DVB Subtitleing descriptor
{
// We don't currently process subtitles from
// TS or PS streams. Set stream 'kind' to N
stream->pes.list[pes_idx].stream_type = 0x00;
stream->pes.list[pes_idx].stream_kind = N;
strncpy(stream->pes.list[pes_idx].codec_name,
"DVB Subtitling", 80);
bits_skip(bb, 8 * len);
} break;
case 0x6a: // DVB AC-3 descriptor
{
stream->pes.list[pes_idx].stream_type = 0x81;
update_pes_kind( stream, pes_idx );
bits_skip(bb, 8 * len);
} break;
case 0x7a: // DVB EAC-3 descriptor
{
stream->pes.list[pes_idx].stream_type = 0x87;
update_pes_kind( stream, pes_idx );
bits_skip(bb, 8 * len);
} break;
default:
bits_skip(bb, 8 * len);
break;
}
}
}
int decode_program_map(hb_stream_t* stream)
{
bitbuf_t bb;
bits_init(&bb, stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
bits_get(&bb, 8); // table_id
bits_get(&bb, 4);
unsigned int section_length = bits_get(&bb, 12);
bits_get(&bb, 16); // program number
bits_get(&bb, 2);
bits_get(&bb, 5); // version_number
bits_get(&bb, 1);
bits_get(&bb, 8); // section_number
bits_get(&bb, 8); // last_section_number
bits_get(&bb, 3);
stream->pmt_info.PCR_PID = bits_get(&bb, 13);
bits_get(&bb, 4);
int program_info_length = bits_get(&bb, 12);
int i;
for (i = 0; i < program_info_length - 2; )
{
uint8_t tag, len;
tag = bits_get(&bb, 8);
len = bits_get(&bb, 8);
i += 2;
if ( i + len > program_info_length )
{
break;
}
if (tag == 0x05 && len >= 4)
{
// registration descriptor
stream->reg_desc = bits_get(&bb, 32);
i += 4;
len -= 4;
}
int j;
for ( j = 0; j < len; j++ )
{
bits_get(&bb, 8);
}
i += len;
}
for ( ; i < program_info_length; i++ )
{
bits_get(&bb, 8);
}
int cur_pos = 9 /* data after the section length field*/ + program_info_length;
int done_reading_stream_types = 0;
int ii = 0;
while (!done_reading_stream_types)
{
unsigned char stream_type = bits_get(&bb, 8);
bits_get(&bb, 3);
unsigned int elementary_PID = bits_get(&bb, 13);
bits_get(&bb, 4);
unsigned int info_len = bits_get(&bb, 12);
// Defined audio stream types are 0x81 for AC-3/A52 audio
// and 0x03 for mpeg audio. But content producers seem to
// use other values (0x04 and 0x06 have both been observed)
// so at this point we say everything that isn't a video
// pid is audio then at the end of hb_stream_title_scan
// we'll figure out which are really audio by looking at
// the PES headers.
int pes_idx;
update_ts_streams( stream, elementary_PID, 0,
stream_type, -1, &pes_idx );
if ( pes_idx >= 0 )
stream->pes.list[pes_idx].map_idx = ii;
if (info_len > 0)
{
bitbuf_t bb_desc;
bits_clone( &bb_desc, &bb, info_len );
if ( pes_idx >= 0 )
decode_element_descriptors( stream, pes_idx, &bb_desc );
bits_skip(&bb, 8 * info_len);
}
cur_pos += 5 /* stream header */ + info_len;
if (cur_pos >= section_length - 4 /* stop before the CRC */)
done_reading_stream_types = 1;
ii++;
}
return 1;
}
static int build_program_map(const uint8_t *buf, hb_stream_t *stream)
{
// Get adaption header info
int adapt_len = 0;
int adaption = (buf[3] & 0x30) >> 4;
if (adaption == 0)
return 0;
else if (adaption == 0x2)
adapt_len = 184;
else if (adaption == 0x3)
adapt_len = buf[4] + 1;
if (adapt_len > 184)
return 0;
// Get payload start indicator
int start;
start = (buf[1] & 0x40) != 0;
// Get pointer length - only valid in packets with a start flag
int pointer_len = 0;
if (start)
{
pointer_len = buf[4 + adapt_len] + 1;
stream->pmt_info.tablepos = 0;
}
// Get Continuity Counter
int continuity_counter = buf[3] & 0x0f;
if (!start && (stream->pmt_info.current_continuity_counter + 1 != continuity_counter))
{
hb_log("build_program_map - Continuity Counter %d out of sequence - expected %d", continuity_counter, stream->pmt_info.current_continuity_counter+1);
return 0;
}
stream->pmt_info.current_continuity_counter = continuity_counter;
stream->pmt_info.reading |= start;
// Add the payload for this packet to the current buffer
int amount_to_copy = 184 - adapt_len - pointer_len;
if (stream->pmt_info.reading && (amount_to_copy > 0))
{
stream->pmt_info.tablebuf = realloc(stream->pmt_info.tablebuf, stream->pmt_info.tablepos + amount_to_copy);
memcpy(stream->pmt_info.tablebuf + stream->pmt_info.tablepos, buf + 4 + adapt_len + pointer_len, amount_to_copy);
stream->pmt_info.tablepos += amount_to_copy;
}
if (stream->pmt_info.tablepos > 3)
{
// We have enough to check the section length
int length;
length = ((stream->pmt_info.tablebuf[1] << 8) +
stream->pmt_info.tablebuf[2]) & 0xFFF;
if (stream->pmt_info.tablepos > length + 1)
{
// We just finished a bunch of packets - parse the program map details
int decode_ok = 0;
if (stream->pmt_info.tablebuf[0] == 0x02)
decode_ok = decode_program_map(stream);
free(stream->pmt_info.tablebuf);
stream->pmt_info.tablebuf = NULL;
stream->pmt_info.tablepos = 0;
stream->pmt_info.reading = 0;
if (decode_ok)
return decode_ok;
}
}
return 0;
}
static int decode_PAT(const uint8_t *buf, hb_stream_t *stream)
{
unsigned char tablebuf[1024];
unsigned int tablepos = 0;
int reading = 0;
// Get adaption header info
int adapt_len = 0;
int adaption = (buf[3] & 0x30) >> 4;
if (adaption == 0)
return 0;
else if (adaption == 0x2)
adapt_len = 184;
else if (adaption == 0x3)
adapt_len = buf[4] + 1;
if (adapt_len > 184)
return 0;
// Get pointer length
int pointer_len = buf[4 + adapt_len] + 1;
// Get payload start indicator
int start;
start = (buf[1] & 0x40) != 0;
if (start)
reading = 1;
// Add the payload for this packet to the current buffer
if (reading && (184 - adapt_len) > 0)
{
if (tablepos + 184 - adapt_len - pointer_len > 1024)
{
hb_log("decode_PAT - Bad program section length (> 1024)");
return 0;
}
memcpy(tablebuf + tablepos, buf + 4 + adapt_len + pointer_len, 184 - adapt_len - pointer_len);
tablepos += 184 - adapt_len - pointer_len;
}
if (start && reading)
{
memcpy(tablebuf + tablepos, buf + 4 + adapt_len + 1, pointer_len - 1);
unsigned int pos = 0;
//while (pos < tablepos)
{
bitbuf_t bb;
bits_init(&bb, tablebuf + pos, tablepos - pos, 0);
unsigned char section_id = bits_get(&bb, 8);
bits_get(&bb, 4);
unsigned int section_len = bits_get(&bb, 12);
bits_get(&bb, 16); // transport_id
bits_get(&bb, 2);
bits_get(&bb, 5); // version_num
bits_get(&bb, 1); // current_next
bits_get(&bb, 8); // section_num
bits_get(&bb, 8); // last_section
switch (section_id)
{
case 0x00:
{
// Program Association Section
section_len -= 5; // Already read transport stream ID, version num, section num, and last section num
section_len -= 4; // Ignore the CRC
int curr_pos = 0;
stream->ts_number_pat_entries = 0;
while ((curr_pos < section_len) && (stream->ts_number_pat_entries < kMaxNumberPMTStreams))
{
unsigned int pkt_program_num = bits_get(&bb, 16);
stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
bits_get(&bb, 3); // Reserved
if (pkt_program_num == 0)
{
bits_get(&bb, 13); // pkt_network_id
}
else
{
unsigned int pkt_program_map_PID = bits_get(&bb, 13);
stream->pat_info[stream->ts_number_pat_entries].program_map_PID = pkt_program_map_PID;
}
curr_pos += 4;
stream->ts_number_pat_entries++;
}
}
break;
case 0xC7:
{
break;
}
case 0xC8:
{
break;
}
}
pos += 3 + section_len;
}
tablepos = 0;
}
return 1;
}
// convert a PES PTS or DTS to an int64
static int64_t parse_pes_timestamp( bitbuf_t *bb )
{
int64_t ts;
ts = ( (uint64_t) bits_get(bb, 3) << 30 ) +
bits_skip(bb, 1) +
( bits_get(bb, 15) << 15 ) +
bits_skip(bb, 1) +
bits_get(bb, 15);
bits_skip(bb, 1);
return ts;
}
static int parse_pes_header(
hb_stream_t *stream,
bitbuf_t *bb,
hb_pes_info_t *pes_info )
{
if ( bits_bytes_left(bb) < 6 )
{
return 0;
}
bits_skip(bb, 8 * 4);
pes_info->packet_len = bits_get(bb, 16);
/*
* This would normally be an error. But the decoders can generally
* recover well from missing data. So let the packet pass.
if ( bits_bytes_left(bb) < pes_info->packet_len )
{
return 0;
}
*/
int mark = bits_peek(bb, 2);
if ( mark == 0x02 )
{
// mpeg2 pes
if ( bits_bytes_left(bb) < 3 )
{
return 0;
}
/*
bits_skip(bb, 2);
bits_get(bb, 2); // scrambling
bits_get(bb, 1); // priority
bits_get(bb, 1); // alignment
bits_get(bb, 1); // copyright
bits_get(bb, 1); // original
*/
bits_get(bb, 8); // skip all of the above
int has_pts = bits_get(bb, 2);
int has_escr = bits_get(bb, 1);
int has_esrate = bits_get(bb, 1);
int has_dsm = bits_get(bb, 1);
int has_copy_info = bits_get(bb, 1);
int has_crc = bits_get(bb, 1);
int has_ext = bits_get(bb, 1);
int hdr_len = pes_info->header_len = bits_get(bb, 8);
pes_info->header_len += bb->pos >> 3;
bitbuf_t bb_hdr;
bits_clone(&bb_hdr, bb, hdr_len);
if ( bits_bytes_left(&bb_hdr) < hdr_len )
{
return 0;
}
int expect = (!!has_pts) * 5 + (has_pts & 0x01) * 5 + has_escr * 6 +
has_esrate * 3 + has_dsm + has_copy_info + has_crc * 2 +
has_ext;
if ( bits_bytes_left(&bb_hdr) < expect )
{
return 0;
}
if( has_pts )
{
if ( bits_bytes_left(&bb_hdr) < 5 )
{
return 0;
}
bits_skip(&bb_hdr, 4);
pes_info->pts = parse_pes_timestamp( &bb_hdr );
if ( has_pts & 1 )
{
if ( bits_bytes_left(&bb_hdr) < 5 )
{
return 0;
}
bits_skip(&bb_hdr, 4);
pes_info->dts = parse_pes_timestamp( &bb_hdr );
}
else
{
pes_info->dts = pes_info->pts;
}
}
if ( has_escr )
bits_skip(&bb_hdr, 8 * 6);
if ( has_esrate )
bits_skip(&bb_hdr, 8 * 3);
if ( has_dsm )
bits_skip(&bb_hdr, 8);
if ( has_copy_info )
bits_skip(&bb_hdr, 8);
if ( has_crc )
bits_skip(&bb_hdr, 8 * 2);
if ( has_ext )
{
int has_private = bits_get(&bb_hdr, 1);
int has_pack = bits_get(&bb_hdr, 1);
int has_counter = bits_get(&bb_hdr, 1);
int has_pstd = bits_get(&bb_hdr, 1);
bits_skip(&bb_hdr, 3); // reserved bits
int has_ext2 = bits_get(&bb_hdr, 1);
expect = (has_private) * 16 + has_pack + has_counter * 2 +
has_pstd * 2 + has_ext2 * 2;
if ( bits_bytes_left(&bb_hdr) < expect )
{
return 0;
}
if ( has_private )
{
bits_skip(&bb_hdr, 8 * 16);
expect -= 2;
}
if ( has_pack )
{
int len = bits_get(&bb_hdr, 8);
expect -= 1;
if ( bits_bytes_left(&bb_hdr) < len + expect )
{
return 0;
}
bits_skip(&bb_hdr, 8 * len);
}
if ( has_counter )
bits_skip(&bb_hdr, 8 * 2);
if ( has_pstd )
bits_skip(&bb_hdr, 8 * 2);
if ( has_ext2 )
{
bits_skip(&bb_hdr, 1); // marker
bits_get(&bb_hdr, 7); // extension length
pes_info->has_stream_id_ext = !bits_get(&bb_hdr, 1);
if ( pes_info->has_stream_id_ext )
pes_info->stream_id_ext = bits_get(&bb_hdr, 7);
}
}
// eat header stuffing
bits_skip(bb, 8 * hdr_len);
}
else
{
// mpeg1 pes
// Skip stuffing
while ( bits_peek(bb, 1) && bits_bytes_left(bb) )
bits_get(bb, 8);
if ( !bits_bytes_left(bb) )
return 0;
// Skip std buffer info
int mark = bits_get(bb, 2);
if ( mark == 0x01 )
{
if ( bits_bytes_left(bb) < 2 )
return 0;
bits_skip(bb, 8 * 2);
}
int has_pts = bits_get(bb, 2);
if( has_pts == 0x02 )
{
pes_info->pts = parse_pes_timestamp( bb );
pes_info->dts = pes_info->pts;
}
else if( has_pts == 0x03 )
{
pes_info->pts = parse_pes_timestamp( bb );
bits_skip(bb, 4);
pes_info->dts = parse_pes_timestamp( bb );
}
else
{
bits_skip(bb, 8); // 0x0f flag
}
if ( bits_bytes_left(bb) < 0 )
return 0;
pes_info->header_len = bb->pos >> 3;
}
if ( pes_info->stream_id == 0xbd && stream->hb_stream_type == program )
{
if ( bits_bytes_left(bb) < 4 )
{
return 0;
}
int ssid = bits_peek(bb, 8);
if( ( ssid >= 0xa0 && ssid <= 0xaf ) ||
( ssid >= 0x20 && ssid <= 0x2f ) )
{
// DVD LPCM or DVD SPU (subtitles)
pes_info->bd_substream_id = bits_get(bb, 8);
pes_info->header_len += 1;
}
else if ( ssid >= 0xb0 && ssid <= 0xbf )
{
// HD-DVD TrueHD has a 4 byte header
pes_info->bd_substream_id = bits_get(bb, 8);
bits_skip(bb, 8 * 4);
pes_info->header_len += 5;
}
else if( ( ssid >= 0x80 && ssid <= 0x9f ) ||
( ssid >= 0xc0 && ssid <= 0xcf ) )
{
// AC3, E-AC3, DTS, and DTS-HD has 3 byte header
pes_info->bd_substream_id = bits_get(bb, 8);
bits_skip(bb, 8 * 3);
pes_info->header_len += 4;
}
}
return 1;
}
static int parse_pack_header(
hb_stream_t *stream,
bitbuf_t *bb,
hb_pes_info_t *pes_info )
{
if ( bits_bytes_left(bb) < 12)
{
return 0;
}
bits_skip(bb, 8 * 4);
int mark = bits_get(bb, 2);
if ( mark == 0x00 )
{
// mpeg1 pack
bits_skip(bb, 2); // marker
}
pes_info->scr = parse_pes_timestamp( bb );
if ( mark == 0x00 )
{
bits_skip(bb, 24);
pes_info->header_len = (bb->pos >> 3);
}
else
{
bits_skip(bb, 39);
int stuffing = bits_get(bb, 3);
pes_info->header_len = stuffing;
pes_info->header_len += (bb->pos >> 3);
}
return 1;
}
// Returns the length of the header
static int hb_parse_ps(
hb_stream_t *stream,
uint8_t *buf,
int len,
hb_pes_info_t *pes_info )
{
memset( pes_info, 0, sizeof( hb_pes_info_t ) );
pes_info->pts = -1;
pes_info->dts = -1;
bitbuf_t bb, cc;
bits_init(&bb, buf, len, 0);
bits_clone(&cc, &bb, len);
if ( bits_bytes_left(&bb) < 4 )
return 0;
// Validate start code
if ( bits_get(&bb, 8 * 3) != 0x000001 )
{
return 0;
}
pes_info->stream_id = bits_get(&bb, 8);
if ( pes_info->stream_id == 0xb9 )
{
// Program stream end code
return 1;
}
else if ( pes_info->stream_id == 0xba )
{
return parse_pack_header( stream, &cc, pes_info );
}
else if ( pes_info->stream_id >= 0xbd &&
pes_info->stream_id != 0xbe &&
pes_info->stream_id != 0xbf &&
pes_info->stream_id != 0xf0 &&
pes_info->stream_id != 0xf1 &&
pes_info->stream_id != 0xf2 &&
pes_info->stream_id != 0xf8 &&
pes_info->stream_id != 0xff )
{
return parse_pes_header( stream, &cc, pes_info );
}
else
{
if ( bits_bytes_left(&bb) < 2 )
{
return 0;
}
pes_info->packet_len = bits_get(&bb, 16);
pes_info->header_len = bb.pos >> 3;
return 1;
}
}
static int hb_ps_read_packet( hb_stream_t * stream, hb_buffer_t *b )
{
// Appends to buffer if size != 0
int start_code = -1;
int pos = b->size;
int stream_id = -1;
int c;
#define cp (b->data)
flockfile( stream->file_handle );
while ( ( c = getc_unlocked( stream->file_handle ) ) != EOF )
{
start_code = ( start_code << 8 ) | c;
if ( ( start_code >> 8 )== 0x000001 )
// we found the start of the next start
break;
}
if ( c == EOF )
goto done;
if ( pos + 4 > b->alloc )
{
// need to expand the buffer
hb_buffer_realloc( b, b->alloc * 2 );
}
cp[pos++] = ( start_code >> 24 ) & 0xff;
cp[pos++] = ( start_code >> 16 ) & 0xff;
cp[pos++] = ( start_code >> 8 ) & 0xff;
cp[pos++] = ( start_code ) & 0xff;
stream_id = start_code & 0xff;
if ( stream_id == 0xba )
{
int start = pos - 4;
// Read pack header
if ( pos + 21 >= b->alloc )
{
// need to expand the buffer
hb_buffer_realloc( b, b->alloc * 2 );
}
// There are at least 8 bytes. More if this is mpeg2 pack.
fread( cp+pos, 1, 8, stream->file_handle );
int mark = cp[pos] >> 4;
pos += 8;
if ( mark != 0x02 )
{
// mpeg-2 pack,
fread( cp+pos, 1, 2, stream->file_handle );
pos += 2;
int len = cp[start+13] & 0x7;
fread( cp+pos, 1, len, stream->file_handle );
pos += len;
}
}
// Non-video streams can emulate start codes, so we need
// to inspect PES packets and skip over their data
// sections to avoid mis-detection of the next pack or pes start code
else if ( stream_id >= 0xbb )
{
int len = 0;
c = getc_unlocked( stream->file_handle );
if ( c == EOF )
goto done;
len = c << 8;
c = getc_unlocked( stream->file_handle );
if ( c == EOF )
goto done;
len |= c;
if ( pos + len + 2 > b->alloc )
{
if ( b->alloc * 2 > pos + len + 2 )
hb_buffer_realloc( b, b->alloc * 2 );
else
hb_buffer_realloc( b, b->alloc * 2 + len + 2 );
}
cp[pos++] = len >> 8;
cp[pos++] = len & 0xff;
if ( len )
{
// Length is non-zero, read the packet all at once
len = fread( cp+pos, 1, len, stream->file_handle );
pos += len;
}
else
{
// Length is zero, read bytes till we find a start code.
// Only video PES packets are allowed to have zero length.
start_code = -1;
while ( ( c = getc_unlocked( stream->file_handle ) ) != EOF )
{
start_code = ( start_code << 8 ) | c;
if ( pos >= b->alloc )
{
// need to expand the buffer
hb_buffer_realloc( b, b->alloc * 2 );
}
cp[pos++] = c;
if ( ( start_code >> 8 ) == 0x000001 &&
( start_code & 0xff ) >= 0xb9 )
{
// we found the start of the next start
break;
}
}
if ( c == EOF )
goto done;
pos -= 4;
fseeko( stream->file_handle, -4, SEEK_CUR );
}
}
else
{
// Unknown, find next start code
start_code = -1;
while ( ( c = getc_unlocked( stream->file_handle ) ) != EOF )
{
start_code = ( start_code << 8 ) | c;
if ( pos >= b->alloc )
{
// need to expand the buffer
hb_buffer_realloc( b, b->alloc * 2 );
}
cp[pos++] = c;
if ( ( start_code >> 8 ) == 0x000001 &&
( start_code & 0xff ) >= 0xb9 )
// we found the start of the next start
break;
}
if ( c == EOF )
goto done;
pos -= 4;
fseeko( stream->file_handle, -4, SEEK_CUR );
}
done:
// Parse packet for information we might need
funlockfile( stream->file_handle );
int len = pos - b->size;
b->size = pos;
#undef cp
return len;
}
static hb_buffer_t * hb_ps_stream_decode( hb_stream_t *stream )
{
hb_pes_info_t pes_info;
hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
while (1)
{
buf->size = 0;
int len = hb_ps_read_packet( stream, buf );
if ( len == 0 )
{
// End of file
hb_buffer_close( &buf );
return buf;
}
if ( !hb_parse_ps( stream, buf->data, buf->size, &pes_info ) )
{
++stream->errors;
continue;
}
// pack header
if ( pes_info.stream_id == 0xba )
{
stream->pes.found_scr = 1;
stream->ts_flags |= TS_HAS_PCR;
stream->pes.scr = pes_info.scr;
continue;
}
// If we don't have a SCR yet but the stream has SCRs just loop
// so we don't process anything until we have a clock reference.
if ( !stream->pes.found_scr && ( stream->ts_flags & TS_HAS_PCR ) )
{
continue;
}
// system header
if ( pes_info.stream_id == 0xbb )
continue;
int idx;
if ( pes_info.stream_id == 0xbd )
{
idx = index_of_ps_stream( stream, pes_info.stream_id,
pes_info.bd_substream_id );
}
else
{
idx = index_of_ps_stream( stream, pes_info.stream_id,
pes_info.stream_id_ext );
}
// Is this a stream carrying data that we care about?
if ( idx < 0 )
continue;
switch (stream->pes.list[idx].stream_kind)
{
case A:
buf->type = AUDIO_BUF;
break;
case V:
buf->type = VIDEO_BUF;
break;
default:
buf->type = OTHER_BUF;
break;
}
if ( stream->need_keyframe )
{
// we're looking for the first video frame because we're
// doing random access during 'scan'
if ( buf->type == VIDEO_BUF )
stream->recovery_frames = isIframe( stream, buf->data, buf->size );
if ( buf->type != VIDEO_BUF || !stream->recovery_frames )
{
// not the video stream or didn't find an I frame
// but we'll only wait 255 video frames for an I frame.
if ( buf->type != VIDEO_BUF || ++stream->need_keyframe < 512 )
{
continue;
}
}
stream->need_keyframe = 0;
}
if ( buf->type == VIDEO_BUF )
++stream->frames;
buf->id = get_id( &stream->pes.list[idx] );
buf->pcr = stream->pes.scr;
buf->start = pes_info.pts;
buf->renderOffset = pes_info.dts;
memmove( buf->data, buf->data + pes_info.header_len,
buf->size - pes_info.header_len );
buf->size -= pes_info.header_len;
if ( buf->size == 0 )
continue;
stream->pes.scr = -1;
return buf;
}
}
static int update_ps_streams( hb_stream_t * stream, int stream_id, int stream_id_ext, int stream_type, int in_kind )
{
int ii;
int same_stream = -1;
kind_t kind = in_kind == -1 ? st2codec[stream_type].kind : in_kind;
for ( ii = 0; ii < stream->pes.count; ii++ )
{
if ( stream->pes.list[ii].stream_id == stream_id )
same_stream = ii;
if ( stream->pes.list[ii].stream_id == stream_id &&
stream->pes.list[ii].stream_id_ext == 0 &&
stream->pes.list[ii].stream_kind == U )
{
// This is an unknown stream type that hasn't been
// given a stream_id_ext. So match only to stream_id
//
// is the stream_id_ext being updated?
if ( stream_id_ext != 0 )
break;
// If stream is already in the list and the new 'kind' is
// PCR, Unknown, or same as before, just return the index
// to the entry found.
if ( kind == P || kind == U || kind == stream->pes.list[ii].stream_kind )
return ii;
// Update stream_type and kind
break;
}
if ( stream_id == stream->pes.list[ii].stream_id &&
stream_id_ext == stream->pes.list[ii].stream_id_ext )
{
// If stream is already in the list and the new 'kind' is
// PCR and the old 'kind' is unknown, set the new 'kind'
if ( kind == P && stream->pes.list[ii].stream_kind == U )
break;
// If stream is already in the list and the new 'kind' is
// PCR, Unknown, or same as before, just return the index
// to the entry found.
if ( kind == P || kind == U || kind == stream->pes.list[ii].stream_kind )
return ii;
// Replace unknown 'kind' with known 'kind'
break;
}
// Resolve multiple videos
if ( kind == V && stream->pes.list[ii].stream_kind == V )
{
if ( stream_id <= stream->pes.list[ii].stream_id &&
stream_id_ext <= stream->pes.list[ii].stream_id_ext )
{
// Assume primary video stream has the smallest stream id
// and only use the primary. move the current item
// to the end of the list. we want to keep it for
// debug and informational purposes.
int jj = new_pes( stream );
memcpy( &stream->pes.list[jj], &stream->pes.list[ii],
sizeof( hb_pes_stream_t ) );
break;
}
}
}
if ( ii == stream->pes.count )
{
ii = new_pes( stream );
if ( same_stream >= 0 )
{
memcpy( &stream->pes.list[ii], &stream->pes.list[same_stream],
sizeof( hb_pes_stream_t ) );
}
else
{
stream->pes.list[ii].map_idx = -1;
}
}
stream->pes.list[ii].stream_id = stream_id;
stream->pes.list[ii].stream_id_ext = stream_id_ext;
stream->pes.list[ii].stream_type = stream_type;
stream->pes.list[ii].stream_kind = kind;
return ii;
}
static void update_pes_kind( hb_stream_t * stream, int idx )
{
kind_t kind = st2codec[stream->pes.list[idx].stream_type].kind;
if ( kind != U && kind != N )
{
stream->pes.list[idx].stream_kind = kind;
}
}
static void ts_pes_list_add( hb_stream_t *stream, int ts_idx, int pes_idx )
{
int ii = stream->ts.list[ts_idx].pes_list;
if ( ii == -1 )
{
stream->ts.list[ts_idx].pes_list = pes_idx;
return;
}
int idx;
while ( ii != -1 )
{
if ( ii == pes_idx ) // Already in list
return;
idx = ii;
ii = stream->pes.list[ii].next;
}
stream->pes.list[idx].next = pes_idx;
}
static int update_ts_streams( hb_stream_t * stream, int pid, int stream_id_ext, int stream_type, int in_kind, int *out_pes_idx )
{
int ii;
int pes_idx = update_ps_streams( stream, pid, stream_id_ext,
stream_type, in_kind );
if ( out_pes_idx )
*out_pes_idx = pes_idx;
if ( pes_idx < 0 )
return -1;
kind_t kind = stream->pes.list[pes_idx].stream_kind;
for ( ii = 0; ii < stream->ts.count; ii++ )
{
if ( pid == stream->ts.list[ii].pid )
{
break;
}
// Resolve multiple videos
if ( kind == V && ts_stream_kind( stream, ii ) == V &&
pes_idx < stream->ts.list[ii].pes_list )
{
// We have a new candidate for the primary video. Move
// the current video to the end of the list. And put the
// new video in this slot
int jj = new_pid( stream );
memcpy( &stream->ts.list[jj], &stream->ts.list[ii],
sizeof( hb_ts_stream_t ) );
break;
}
}
if ( ii == stream->ts.count )
ii = new_pid( stream );
stream->ts.list[ii].pid = pid;
ts_pes_list_add( stream, ii, pes_idx );
if ( in_kind == P )
stream->ts.list[ii].is_pcr = 1;
return ii;
}
static int decode_ps_map( hb_stream_t * stream, uint8_t *buf, int len )
{
int retval = 1;
bitbuf_t bb;
bits_init(&bb, buf, len, 0);
if ( bits_bytes_left(&bb) < 10 )
return 0;
// Skip stuff not needed
bits_skip(&bb, 8 * 8);
int info_len = bits_get(&bb, 16);
if ( bits_bytes_left(&bb) < info_len )
return 0;
if ( info_len )
{
bitbuf_t cc;
bits_clone( &cc, &bb, info_len );
while ( bits_bytes_left(&cc) >= 2 )
{
uint8_t tag, len;
tag = bits_get(&cc, 8);
len = bits_get(&cc, 8);
if ( bits_bytes_left(&cc) < len )
return 0;
if (tag == 0x05 && len >= 4)
{
// registration descriptor
stream->reg_desc = bits_get(&cc, 32);
bits_skip(&cc, 8 * (len - 4));
}
else
{
bits_skip(&cc, 8 * len);
}
}
bits_skip(&bb, 8 * info_len);
}
int map_len = bits_get(&bb, 16);
if ( bits_bytes_left(&bb) < map_len )
return 0;
// Process the map
int ii = 0;
while ( bits_bytes_left(&bb) >= 8 )
{
int pes_idx;
int stream_type = bits_get(&bb, 8);
int stream_id = bits_get(&bb, 8);
info_len = bits_get(&bb, 16);
if ( info_len > bits_bytes_left(&bb) )
return 0;
int substream_id = 0;
switch ( stream_type )
{
case 0x81: // ac3
case 0x82: // dts
case 0x83: // lpcm
case 0x87: // eac3
// If the stream_id isn't one of the standard mpeg
// stream ids, assume it is an private stream 1 substream id.
// This is how most PS streams specify this type of audio.
//
// TiVo sets the stream id to 0xbd and does not
// give a substream id. This limits them to one audio
// stream and differs from how everyone else specifies
// this type of audio.
if ( stream_id < 0xb9 )
{
substream_id = stream_id;
stream_id = 0xbd;
}
break;
default:
break;
}
pes_idx = update_ps_streams( stream, stream_id, substream_id,
stream_type, -1 );
if ( pes_idx >= 0 )
stream->pes.list[pes_idx].map_idx = ii;
if ( info_len > 0 )
{
bitbuf_t bb_desc;
bits_clone( &bb_desc, &bb, info_len );
if ( pes_idx >= 0 )
decode_element_descriptors( stream, pes_idx, &bb_desc );
bits_skip(&bb, 8 * info_len);
}
ii++;
}
// skip CRC 32
return retval;
}
static void hb_ps_stream_find_streams(hb_stream_t *stream)
{
int ii, jj;
hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
fseeko( stream->file_handle, 0, SEEK_SET );
// Scan beginning of file, then if no program stream map is found
// seek to 20% and scan again since there's occasionally no
// audio at the beginning (particularly for vobs).
for ( ii = 0; ii < 2; ii++ )
{
for ( jj = 0; jj < MAX_PS_PROBE_SIZE; jj += buf->size )
{
int stream_type;
int len;
hb_pes_info_t pes_info;
buf->size = 0;
len = hb_ps_read_packet( stream, buf );
if ( len == 0 )
{
// Must have reached EOF
break;
}
if ( !hb_parse_ps( stream, buf->data, buf->size, &pes_info ) )
{
hb_deep_log( 2, "hb_ps_stream_find_streams: Error parsing PS packet");
continue;
}
if ( pes_info.stream_id == 0xba )
{
stream->ts_flags |= TS_HAS_PCR;
}
else if ( pes_info.stream_id == 0xbc )
{
// program stream map
// Note that if there is a program map, any
// extrapolation that is made below based on
// stream id may be overridden by entry in the map.
if ( decode_ps_map( stream, buf->data, buf->size ) )
{
hb_log("Found program stream map");
goto done;
}
else
{
hb_error("Error parsing program stream map");
}
}
else if ( ( pes_info.stream_id & 0xe0 ) == 0xc0 )
{
// MPeg audio (c0 - df)
stream_type = 0x04;
update_ps_streams( stream, pes_info.stream_id,
pes_info.stream_id_ext, stream_type, -1 );
}
else if ( pes_info.stream_id == 0xbd )
{
int ssid = pes_info.bd_substream_id;
// Add a potentail audio stream
// Check dvd substream id
if ( ssid >= 0x20 && ssid <= 0x37 )
{
// Skip dvd subtitles
int idx = update_ps_streams( stream, pes_info.stream_id,
pes_info.bd_substream_id, 0, -1 );
stream->pes.list[idx].stream_kind = N;
strncpy(stream->pes.list[idx].codec_name,
"DVD Subtitle", 80);
continue;
}
if ( ssid >= 0x80 && ssid <= 0x87 )
{
stream_type = 0x81; // ac3
}
else if ( ( ssid >= 0x88 && ssid <= 0x8f ) ||
( ssid >= 0x98 && ssid <= 0x9f ) )
{
// Could be either dts or dts-hd
// will have to probe to resolve
int idx = update_ps_streams( stream, pes_info.stream_id,
pes_info.bd_substream_id, 0, U );
stream->pes.list[idx].codec = HB_ACODEC_DCA_HD;
stream->pes.list[idx].codec_param = CODEC_ID_DTS;
continue;
}
else if ( ssid >= 0xa0 && ssid <= 0xaf )
{
stream_type = 0x83; // lpcm
// This is flagged as an unknown stream type in
// st2codec because it can be either LPCM or
// BD TrueHD. In this case it is LPCM.
update_ps_streams( stream, pes_info.stream_id,
pes_info.bd_substream_id, stream_type, A );
continue;
}
else if ( ssid >= 0xb0 && ssid <= 0xbf )
{
// HD-DVD TrueHD
int idx = update_ps_streams( stream, pes_info.stream_id,
pes_info.bd_substream_id, 0, A );
stream->pes.list[idx].codec = HB_ACODEC_FFMPEG;
stream->pes.list[idx].codec_param = CODEC_ID_TRUEHD;
continue;
}
else if ( ssid >= 0xc0 && ssid <= 0xcf )
{
// HD-DVD uses this for both ac3 and eac3.
// Check ac3 bitstream_id to distinguish between them.
bitbuf_t bb;
bits_init(&bb, buf->data + pes_info.header_len,
buf->size - pes_info.header_len, 0);
int sync = bits_get(&bb, 16);
if ( sync == 0x0b77 )
{
bits_skip(&bb, 24);
int bsid = bits_get(&bb, 5);
if ( bsid <= 10 )
{
// ac3
stream_type = 0x81; // ac3
}
else
{
// eac3
stream_type = 0x87; // eac3
}
}
else
{
// Doesn't look like an ac3 stream. Probe it.
stream_type = 0x00;
}
}
else
{
// Unknown. Probe it.
stream_type = 0x00;
}
update_ps_streams( stream, pes_info.stream_id,
pes_info.bd_substream_id, stream_type, -1 );
}
else if ( ( pes_info.stream_id & 0xf0 ) == 0xe0 )
{
// Normally this is MPEG video, but MPEG-1 PS streams
// (which do not have a program stream map) may use
// this for other types of video.
//
// Also, the hddvd tards decided to use 0xe2 and 0xe3 for
// h.264 video :( and the twits decided not to put a
// program stream map in the stream :'(
//
// So set this to an unknown stream type and probe.
stream_type = 0x00;
update_ps_streams( stream, pes_info.stream_id,
pes_info.stream_id_ext, stream_type, -1 );
}
else if ( pes_info.stream_id == 0xfd )
{
if ( pes_info.stream_id_ext == 0x55 ||
pes_info.stream_id_ext == 0x56 )
{
// hddvd uses this for vc-1.
stream_type = 0xea;
}
else
{
// mark as unknown and probe.
stream_type = 0x00;
}
update_ps_streams( stream, pes_info.stream_id,
pes_info.stream_id_ext, stream_type, -1 );
}
}
hb_stream_seek( stream, 0.2 );
}
done:
hb_buffer_close( &buf );
}
static int probe_dts_profile( hb_pes_stream_t *pes )
{
hb_work_info_t info;
hb_work_object_t *w = hb_codec_decoder( pes->codec );
w->codec_param = pes->codec_param;
int ret = w->bsinfo( w, pes->probe_buf, &info );
if ( ret < 0 )
{
hb_log( "probe_dts_profile: no info type %d/0x%x for id 0x%x",
pes->codec, pes->codec_param, pes->stream_id );
}
switch (info.profile)
{
case FF_PROFILE_DTS:
case FF_PROFILE_DTS_96_24:
pes->codec = HB_ACODEC_DCA;
pes->stream_type = 0x82;
pes->stream_kind = A;
break;
case FF_PROFILE_DTS_ES:
pes->stream_type = 0;
pes->stream_kind = A;
break;
case FF_PROFILE_DTS_HD_HRA:
pes->stream_type = 0;
pes->stream_kind = A;
break;
case FF_PROFILE_DTS_HD_MA:
pes->stream_type = 0;
pes->stream_kind = A;
break;
default:
return 0;
}
const char *profile_name;
AVCodec *codec = avcodec_find_decoder( pes->codec_param );
profile_name = av_get_profile_name( codec, info.profile );
if ( profile_name )
{
strncpy(pes->codec_name, profile_name, 80);
pes->codec_name[79] = 0;
}
return 1;
}
static int do_probe( hb_pes_stream_t *pes, hb_buffer_t *buf )
{
// Check upper limit of per stream data to probe
if ( pes->probe_buf == NULL )
{
pes->probe_buf = hb_buffer_init( 0 );
}
if ( pes->probe_buf->size > HB_MAX_PROBE_SIZE )
{
pes->stream_kind = N;
hb_buffer_close( &pes->probe_buf );
return 1;
}
// Add this stream buffer to probe buffer and perform probe
AVInputFormat *fmt = NULL;
int score = 0;
AVProbeData pd = {0,};
int size = pes->probe_buf->size + buf->size;
hb_buffer_realloc(pes->probe_buf, size + AVPROBE_PADDING_SIZE );
memcpy( pes->probe_buf->data + pes->probe_buf->size, buf->data, buf->size );
pes->probe_buf->size = size;
if ( pes->codec == HB_ACODEC_DCA_HD )
{
// We need to probe for the profile of DTS audio in this stream.
return probe_dts_profile( pes );
}
// Probing is slow, so we don't want to re-probe the probe
// buffer for every packet we add to it. Grow the buffer
// by a factor of 2 before probing again.
if ( pes->probe_buf->size < pes->probe_next_size )
return 0;
pes->probe_next_size = pes->probe_buf->size * 2;
pd.buf = pes->probe_buf->data;
pd.buf_size = pes->probe_buf->size;
fmt = av_probe_input_format2( &pd, 1, &score );
if ( fmt && score > AVPROBE_SCORE_MAX / 2 )
{
AVCodec *codec = avcodec_find_decoder_by_name( fmt->name );
if ( codec )
{
pes->codec_param = codec->id;
if ( codec->type == AVMEDIA_TYPE_VIDEO )
{
pes->stream_kind = V;
switch ( codec->id )
{
case CODEC_ID_MPEG1VIDEO:
pes->codec = WORK_DECMPEG2;
pes->stream_type = 0x01;
break;
case CODEC_ID_MPEG2VIDEO:
pes->codec = WORK_DECMPEG2;
pes->stream_type = 0x02;
break;
case CODEC_ID_H264:
pes->codec = WORK_DECAVCODECV;
pes->stream_type = 0x1b;
break;
case CODEC_ID_VC1:
pes->codec = WORK_DECAVCODECV;
pes->stream_type = 0xea;
break;
default:
pes->codec = WORK_DECAVCODECV;
}
}
else if ( codec->type == AVMEDIA_TYPE_AUDIO )
{
pes->stream_kind = A;
switch ( codec->id )
{
case CODEC_ID_AC3:
pes->codec = HB_ACODEC_AC3;
break;
default:
pes->codec = HB_ACODEC_FFMPEG;
}
}
else
{
pes->stream_kind = N;
}
strncpy(pes->codec_name, fmt->name, 79);
pes->codec_name[79] = 0;
}
else
{
pes->stream_kind = N;
}
hb_buffer_close( &pes->probe_buf );
return 1;
}
return 0;
}
static void hb_ts_resolve_pid_types(hb_stream_t *stream)
{
int ii, probe = 0;
for ( ii = 0; ii < stream->ts.count; ii++ )
{
int pid = stream->ts.list[ii].pid;
int stype = ts_stream_type( stream, ii );
int pes_idx;
if ( stype == 0x80 &&
stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// LPCM audio in bluray have an stype of 0x80
// 0x80 is used for other DigiCipher normally
// To distinguish, Bluray streams have a reg_desc of HDMV
update_ts_streams( stream, pid, 0, stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_FFMPEG;
stream->pes.list[pes_idx].codec_param = CODEC_ID_PCM_BLURAY;
continue;
}
// The blu ray consortium apparently forgot to read the portion
// of the MPEG spec that says one PID should map to one media
// stream and multiplexed multiple types of audio into one PID
// using the extended stream identifier of the PES header to
// distinguish them. So we have to check if that's happening and
// if so tell the runtime what esid we want.
if ( stype == 0x83 &&
stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// This is an interleaved TrueHD/AC-3 stream and the esid of
// the AC-3 is 0x76
update_ts_streams( stream, pid, HB_SUBSTREAM_BD_AC3,
stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_AC3;
update_ts_streams( stream, pid, HB_SUBSTREAM_BD_TRUEHD,
stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_FFMPEG;
stream->pes.list[pes_idx].codec_param = CODEC_ID_TRUEHD;
continue;
}
if ( ( stype == 0x84 || stype == 0xa1 ) &&
stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// EAC3 audio in bluray has an stype of 0x84
// which conflicts with SDDS
// To distinguish, Bluray streams have a reg_desc of HDMV
update_ts_streams( stream, pid, 0, stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_FFMPEG;
stream->pes.list[pes_idx].codec_param = CODEC_ID_EAC3;
continue;
}
if ( ( stype == 0x85 || stype == 0xa2 ) &&
stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// DTS-HD HRA audio in bluray has an stype of 0x85
// which conflicts with ATSC Program ID
// To distinguish, Bluray streams have a reg_desc of HDMV
// This is an interleaved DTS-HD HRA/DTS stream and the
// esid of the DTS is 0x71
update_ts_streams( stream, pid, HB_SUBSTREAM_BD_DTS,
stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_DCA;
update_ts_streams( stream, pid, 0, stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_DCA_HD;
stream->pes.list[pes_idx].codec_param = CODEC_ID_DTS;
continue;
}
if ( stype == 0x86 &&
stream->reg_desc == STR4_TO_UINT32("HDMV") )
{
// This is an interleaved DTS-HD MA/DTS stream and the
// esid of the DTS is 0x71
update_ts_streams( stream, pid, HB_SUBSTREAM_BD_DTS,
stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_DCA;
update_ts_streams( stream, pid, 0, stype, A, &pes_idx );
stream->pes.list[pes_idx].codec = HB_ACODEC_DCA_HD;
stream->pes.list[pes_idx].codec_param = CODEC_ID_DTS;
continue;
}
// stype == 0 indicates a type not in st2codec table
if ( stype != 0 &&
( ts_stream_kind( stream, ii ) == A ||
ts_stream_kind( stream, ii ) == V ) )
{
// Assuming there are no substreams.
// This should be true before probing.
// This function is only called before
// probing.
pes_idx = stream->ts.list[ii].pes_list;
stream->pes.list[pes_idx].codec = st2codec[stype].codec;
stream->pes.list[pes_idx].codec_param = st2codec[stype].codec_param;
continue;
}
if ( ts_stream_kind( stream, ii ) == U )
{
probe++;
}
}
// Probe remaining unknown streams for stream types
hb_stream_seek( stream, 0.0 );
stream->need_keyframe = 0;
int total_size = 0;
hb_buffer_t *buf;
if ( probe )
hb_log("Probing %d unknown stream%s", probe, probe > 1 ? "s" : "" );
while ( probe && ( buf = hb_ts_stream_decode( stream ) ) != NULL )
{
// Check upper limit of total data to probe
total_size += buf->size;
if ( total_size > HB_MAX_PROBE_SIZE * 2 )
break;
int idx;
idx = index_of_id( stream, buf->id );
if (idx < 0 || stream->pes.list[idx].stream_kind != U )
continue;
hb_pes_stream_t *pes = &stream->pes.list[idx];
if ( do_probe( pes, buf ) )
{
probe--;
if ( pes->stream_kind != N )
{
hb_log(" Probe: Found stream %s. stream id 0x%x-0x%x",
pes->codec_name, pes->stream_id, pes->stream_id_ext);
}
else
{
hb_log(" Probe: Unsupported stream %s. stream id 0x%x-0x%x",
pes->codec_name, pes->stream_id, pes->stream_id_ext);
}
}
}
// Clean up any probe buffers and set all remaining unknown
// streams to 'kind' N
for ( ii = 0; ii < stream->pes.count; ii++ )
{
if ( stream->pes.list[ii].stream_kind == U )
stream->pes.list[ii].stream_kind = N;
hb_buffer_close( &stream->pes.list[ii].probe_buf );
stream->pes.list[ii].probe_next_size = 0;
}
}
static void hb_ps_resolve_stream_types(hb_stream_t *stream)
{
int ii, probe = 0;
for ( ii = 0; ii < stream->pes.count; ii++ )
{
int stype = stream->pes.list[ii].stream_type;
// stype == 0 indicates a type not in st2codec table
if ( stype != 0 &&
( stream->pes.list[ii].stream_kind == A ||
stream->pes.list[ii].stream_kind == V ) )
{
stream->pes.list[ii].codec = st2codec[stype].codec;
stream->pes.list[ii].codec_param = st2codec[stype].codec_param;
continue;
}
if ( stream->pes.list[ii].stream_kind == U )
{
probe++;
}
}
// Probe remaining unknown streams for stream types
hb_stream_seek( stream, 0.0 );
stream->need_keyframe = 0;
int total_size = 0;
hb_buffer_t *buf;
if ( probe )
hb_log("Probing %d unknown stream%s", probe, probe > 1 ? "s" : "" );
while ( probe && ( buf = hb_ps_stream_decode( stream ) ) != NULL )
{
// Check upper limit of total data to probe
total_size += buf->size;
if ( total_size > HB_MAX_PROBE_SIZE * 2 )
break;
int idx;
idx = index_of_id( stream, buf->id );
if (idx < 0 || stream->pes.list[idx].stream_kind != U )
continue;
hb_pes_stream_t *pes = &stream->pes.list[idx];
if ( do_probe( pes, buf ) )
{
probe--;
if ( pes->stream_kind != N )
{
hb_log(" Probe: Found stream %s. stream id 0x%x-0x%x",
pes->codec_name, pes->stream_id, pes->stream_id_ext);
}
else
{
hb_log(" Probe: Unsupported stream %s. stream id 0x%x-0x%x",
pes->codec_name, pes->stream_id, pes->stream_id_ext);
}
}
}
// Clean up any probe buffers and set all remaining unknown
// streams to 'kind' N
for ( ii = 0; ii < stream->pes.count; ii++ )
{
if ( stream->pes.list[ii].stream_kind == U )
stream->pes.list[ii].stream_kind = N;
hb_buffer_close( &stream->pes.list[ii].probe_buf );
stream->pes.list[ii].probe_next_size = 0;
}
}
static void hb_ts_stream_find_pids(hb_stream_t *stream)
{
// To be different from every other broadcaster in the world, New Zealand TV
// changes PMTs (and thus video & audio PIDs) when 'programs' change. Since
// we may have the tail of the previous program at the beginning of this
// file, take our PMT from the middle of the file.
fseeko(stream->file_handle, 0, SEEK_END);
uint64_t fsize = ftello(stream->file_handle);
fseeko(stream->file_handle, fsize >> 1, SEEK_SET);
align_to_next_packet(stream);
// Read the Transport Stream Packets (188 bytes each) looking at first for PID 0 (the PAT PID), then decode that
// to find the program map PID and then decode that to get the list of audio and video PIDs
for (;;)
{
const uint8_t *buf = next_packet( stream );
if ( buf == NULL )
{
hb_log("hb_ts_stream_find_pids - end of file");
break;
}
// Get pid
int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
if ((pid == 0x0000) && (stream->ts_number_pat_entries == 0))
{
decode_PAT(buf, stream);
continue;
}
int pat_index = 0;
for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
{
// There are some streams where the PAT table has multiple
// entries as if their are multiple programs in the same
// transport stream, and yet there's actually only one
// program really in the stream. This seems to be true for
// transport streams that originate in the HDHomeRun but have
// been output by EyeTV's export utility. What I think is
// happening is that the HDHomeRun is sending the entire
// transport stream as broadcast, but the EyeTV is only
// recording a single (selected) program number and not
// rewriting the PAT info on export to match what's actually
// on the stream. Until we have a way of handling multiple
// programs per transport stream elegantly we'll match on the
// first pat entry for which we find a matching program map PID.
// The ideal solution would be to build a title choice popup
// from the PAT program number details and then select from
// their - but right now the API's not capable of that.
if (stream->pat_info[pat_index].program_number != 0 &&
pid == stream->pat_info[pat_index].program_map_PID)
{
if (build_program_map(buf, stream) > 0)
break;
}
}
// Keep going until we have a complete set of PIDs
if ( ts_index_of_video( stream ) >= 0 )
break;
}
update_ts_streams( stream, stream->pmt_info.PCR_PID, 0, -1, P, NULL );
}
static void fwrite64( hb_buffer_t * buf, void *data, int len )
{
if ( len > 0 )
{
int pos = buf->size;
if ( pos + len > buf->alloc )
{
int size = MAX(buf->alloc * 2, pos + len);
hb_buffer_realloc(buf, size);
}
memcpy( &(buf->data[pos]), data, len );
buf->size += len;
}
}
// convert a PES PTS or DTS to an int64
static int64_t pes_timestamp( const uint8_t *buf )
{
int64_t ts;
ts = ( (uint64_t) ( buf[0] & 0x0e ) << 29 ) +
( buf[1] << 22 ) +
( ( buf[2] >> 1 ) << 15 ) +
( buf[3] << 7 ) +
( buf[4] >> 1 );
return ts;
}
static hb_buffer_t * generate_output_data(hb_stream_t *stream, int curstream)
{
hb_buffer_t *buf = NULL, *first = NULL;
hb_pes_info_t pes_info;
hb_buffer_t * b = stream->ts.list[curstream].buf;
if ( !hb_parse_ps( stream, b->data, b->size, &pes_info ) )
{
b->size = 0;
return NULL;
}
uint8_t *tdat = b->data;
int size = b->size - pes_info.header_len;
if ( size <= 0 )
{
b->size = 0;
return NULL;
}
// Check all substreams to see if this packet matches
int pes_idx;
for ( pes_idx = stream->ts.list[curstream].pes_list; pes_idx != -1;
pes_idx = stream->pes.list[pes_idx].next )
{
if ( stream->pes.list[pes_idx].stream_id_ext != pes_info.stream_id_ext &&
stream->pes.list[pes_idx].stream_id_ext != 0 )
{
continue;
}
// The substreams match.
// Note that when stream->pes.list[pes_idx].stream_id_ext == 0,
// we want the whole TS stream including all substreams.
// DTS-HD is an example of this.
if ( first == NULL )
first = buf = hb_buffer_init( size );
else
{
hb_buffer_t *tmp = hb_buffer_init( size );
buf->next = tmp;
buf = tmp;
}
buf->size = 0;
buf->id = get_id( &stream->pes.list[pes_idx] );
switch (stream->pes.list[pes_idx].stream_kind)
{
case A:
buf->type = AUDIO_BUF;
break;
case V:
buf->type = VIDEO_BUF;
break;
default:
buf->type = OTHER_BUF;
break;
}
// check if this packet was referenced to an older pcr and if that
// pcr was significantly different than the one we're using now.
// (the reason for the uint cast on the pcr difference is that the
// difference is significant if it advanced by more than 200ms or if
// it went backwards by any amount. The negative numbers look like
// huge unsigned ints so the cast allows both conditions to be
// checked at once.
int64_t bufpcr = b->pcr;
int64_t curpcr = stream->ts.pcr_current;
if ( b->cur < stream->ts.pcr_out &&
bufpcr != -1 && curpcr != -1 && curpcr - bufpcr > 200*90LL )
{
// we've sent up a new pcr but have a packet referenced to an
// old pcr and the difference was enough to trigger a discontinuity
// correction. smash the timestamps or we'll mess up the correction.
buf->start = -1;
buf->renderOffset = -1;
buf->stop = -1;
buf->pcr = -1;
}
else
{
if ( stream->ts.pcr_out != stream->ts.pcr_in )
{
// we have a new pcr
stream->ts.pcr_out = stream->ts.pcr_in;
buf->pcr = stream->ts.pcr;
stream->ts.pcr_current = stream->ts.pcr;
}
else
{
buf->pcr = -1;
}
// put the PTS & possible DTS into 'start' & 'renderOffset'
// then strip off the PES header.
buf->start = pes_info.pts;
buf->renderOffset = pes_info.dts;
}
fwrite64( buf, tdat + pes_info.header_len, size );
}
b->size = 0;
return first;
}
static void hb_ts_stream_append_pkt(hb_stream_t *stream, int idx, const uint8_t *buf, int len)
{
if (stream->ts.list[idx].buf->size + len > stream->ts.list[idx].buf->alloc)
{
int size;
size = MAX( stream->ts.list[idx].buf->alloc * 2,
stream->ts.list[idx].buf->size + len);
hb_buffer_realloc(stream->ts.list[idx].buf, size);
}
memcpy( stream->ts.list[idx].buf->data + stream->ts.list[idx].buf->size,
buf, len);
stream->ts.list[idx].buf->size += len;
}
int hb_stream_recovery_count( hb_stream_t *stream )
{
int count = stream->recovery_frames;
stream->recovery_frames = 0;
return count;
}
/***********************************************************************
* hb_ts_stream_decode
***********************************************************************
*
**********************************************************************/
hb_buffer_t * hb_ts_decode_pkt( hb_stream_t *stream, const uint8_t * pkt )
{
/*
* stash the output buffer pointer in our stream so we don't have to
* pass it & its original value to everything we call.
*/
int video_index = ts_index_of_video(stream);
int curstream;
hb_buffer_t *buf;
/* This next section validates the packet */
// Get pid and use it to find stream state.
int pid = ((pkt[1] & 0x1F) << 8) | pkt[2];
if ( ( curstream = index_of_pid( stream, pid ) ) < 0 )
{
return NULL;
}
// Get error
int errorbit = (pkt[1] & 0x80) != 0;
if (errorbit)
{
ts_err( stream, curstream, "packet error bit set");
return NULL;
}
// Get adaption header info
int adaption = (pkt[3] & 0x30) >> 4;
int adapt_len = 0;
if (adaption == 0)
{
ts_err( stream, curstream, "adaptation code 0");
return NULL;
}
else if (adaption == 0x2)
adapt_len = 184;
else if (adaption == 0x3)
{
adapt_len = pkt[4] + 1;
if (adapt_len > 184)
{
ts_err( stream, curstream, "invalid adapt len %d", adapt_len);
return NULL;
}
}
if ( adapt_len > 0 )
{
if ( pkt[5] & 0x40 )
{
// found a random access point
}
// if there's an adaptation header & PCR_flag is set
// get the PCR (Program Clock Reference)
if ( adapt_len > 7 && ( pkt[5] & 0x10 ) != 0 )
{
stream->ts.pcr = ( (uint64_t)pkt[6] << (33 - 8) ) |
( (uint64_t)pkt[7] << (33 - 16) ) |
( (uint64_t)pkt[8] << (33 - 24) ) |
( (uint64_t)pkt[9] << (33 - 32) ) |
( pkt[10] >> 7 );
++stream->ts.pcr_in;
stream->ts.found_pcr = 1;
stream->ts_flags |= TS_HAS_PCR;
}
}
// If we don't have a PCR yet but the stream has PCRs just loop
// so we don't process anything until we have a clock reference.
// Unfortunately the HD Home Run appears to null out the PCR so if
// we didn't detect a PCR during scan keep going and we'll use
// the video stream DTS for the PCR.
if ( !stream->ts.found_pcr && ( stream->ts_flags & TS_HAS_PCR ) )
{
return NULL;
}
// Get continuity
// Continuity only increments for adaption values of 0x3 or 0x01
// and is not checked for start packets.
int start = (pkt[1] & 0x40) != 0;
if ( (adaption & 0x01) != 0 )
{
int continuity = (pkt[3] & 0xF);
if ( continuity == stream->ts.list[curstream].continuity )
{
// Spliced transport streams can have duplicate
// continuity counts at the splice boundary.
// Test to see if the packet is really a duplicate
// by comparing packet summaries to see if they
// match.
uint8_t summary[8];
summary[0] = adaption;
summary[1] = adapt_len;
if (adapt_len + 4 + 6 + 9 <= 188)
{
memcpy(&summary[2], pkt+4+adapt_len+9, 6);
}
else
{
memset(&summary[2], 0, 6);
}
if ( memcmp( summary, stream->ts.list[curstream].pkt_summary, 8 ) == 0 )
{
// we got a duplicate packet (usually used to introduce
// a PCR when one is needed). The only thing that can
// change in the dup is the PCR which we grabbed above
// so ignore the rest.
return NULL;
}
}
if ( !start && (stream->ts.list[curstream].continuity != -1) &&
!stream->ts.list[curstream].skipbad &&
(continuity != ( (stream->ts.list[curstream].continuity + 1) & 0xf ) ) )
{
ts_err( stream, curstream, "continuity error: got %d expected %d",
(int)continuity,
(stream->ts.list[curstream].continuity + 1) & 0xf );
stream->ts.list[curstream].continuity = continuity;
return NULL;
}
stream->ts.list[curstream].continuity = continuity;
// Save a summary of this packet for later duplicate
// testing. The summary includes some header information
// and payload bytes. Should be enough to detect
// non-duplicates.
stream->ts.list[curstream].pkt_summary[0] = adaption;
stream->ts.list[curstream].pkt_summary[1] = adapt_len;
if (adapt_len + 4 + 6 + 9 <= 188)
{
memcpy(&stream->ts.list[curstream].pkt_summary[2],
pkt+4+adapt_len+9, 6);
}
else
{
memset(&stream->ts.list[curstream].pkt_summary[2], 0, 6);
}
}
/* If we get here the packet is valid - process its data */
if ( start )
{
// Found a random access point or we have finished generating a PES
// and must start a new one.
// PES must begin with an mpeg start code
const uint8_t *pes = pkt + adapt_len + 4;
if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 )
{
ts_err( stream, curstream, "missing start code" );
stream->ts.list[curstream].skipbad = 1;
return NULL;
}
if ( stream->need_keyframe && video_index >= 0 )
{
// we're looking for the first video frame because we're
// doing random access during 'scan'
if ( curstream == video_index )
stream->recovery_frames = ts_isIframe( stream, pkt, adapt_len );
if ( curstream != video_index || !stream->recovery_frames )
{
// not the video stream or didn't find an I frame
// but we'll only wait 255 video frames for an I frame.
if ( curstream != video_index || ++stream->need_keyframe < 512 )
{
return NULL;
}
}
stream->need_keyframe = 0;
}
// If we were skipping a bad packet, start fresh on this new PES packet..
if (stream->ts.list[curstream].skipbad == 1)
{
stream->ts.list[curstream].skipbad = 0;
}
if ( curstream == video_index )
{
++stream->frames;
// if we don't have a pcr yet use the dts from this frame
if ( !stream->ts.found_pcr )
{
// PES must begin with an mpeg start code & contain
// a DTS or PTS.
const uint8_t *pes = pkt + adapt_len + 4;
if ( pes[0] != 0x00 || pes[1] != 0x00 || pes[2] != 0x01 ||
( pes[7] >> 6 ) == 0 )
{
return NULL;
}
// if we have a dts use it otherwise use the pts
stream->ts.pcr = pes_timestamp( pes + ( pes[7] & 0x40?14:9 ) );
++stream->ts.pcr_in;
}
}
// If we have some data already on this stream, turn it into
// a program stream packet. Then add the payload for this
// packet to the current pid's buffer.
if ( stream->ts.list[curstream].buf->size )
{
// we have to ship the old packet before updating the pcr
// since the packet we've been accumulating is referenced
// to the old pcr.
buf = generate_output_data(stream, curstream);
if ( buf )
{
// Output data is ready.
// remember the pcr that was in effect when we started
// this packet.
stream->ts.list[curstream].buf->cur = stream->ts.pcr_in;
stream->ts.list[curstream].buf->pcr = stream->ts.pcr;
hb_ts_stream_append_pkt(stream, curstream, pkt + 4 + adapt_len,
184 - adapt_len);
return buf;
}
}
// remember the pcr that was in effect when we started this packet.
stream->ts.list[curstream].buf->cur = stream->ts.pcr_in;
stream->ts.list[curstream].buf->pcr = stream->ts.pcr;
}
// Add the payload for this packet to the current buffer
if (!stream->ts.list[curstream].skipbad && (184 - adapt_len) > 0)
{
hb_ts_stream_append_pkt(stream, curstream, pkt + 4 + adapt_len,
184 - adapt_len);
// see if we've hit the end of this PES packet
const uint8_t *pes = stream->ts.list[curstream].buf->data;
int len = ( pes[4] << 8 ) + pes[5] + 6;
if ( len > 6 && stream->ts.list[curstream].buf->size == len &&
pes[0] == 0x00 && pes[1] == 0x00 && pes[2] == 0x01 )
{
buf = generate_output_data(stream, curstream);
if ( buf )
return buf;
}
}
return NULL;
}
static hb_buffer_t * hb_ts_stream_decode( hb_stream_t *stream )
{
hb_buffer_t * b;
// spin until we get a packet of data from some stream or hit eof
while ( 1 )
{
const uint8_t *buf = next_packet(stream);
if ( buf == NULL )
{
// end of file - we didn't finish filling our ps write buffer
// so just discard the remainder (the partial buffer is useless)
hb_log("hb_ts_stream_decode - eof");
return NULL;
}
b = hb_ts_decode_pkt( stream, buf );
if ( b )
{
return b;
}
}
return NULL;
}
void hb_ts_stream_reset(hb_stream_t *stream)
{
int i;
for (i=0; i < stream->ts.count; i++)
{
if ( stream->ts.list[i].buf )
stream->ts.list[i].buf->size = 0;
if ( stream->ts.list[i].extra_buf )
stream->ts.list[i].extra_buf->size = 0;
stream->ts.list[i].skipbad = 1;
stream->ts.list[i].continuity = -1;
}
stream->need_keyframe = 0;
stream->ts.found_pcr = 0;
stream->ts.pcr_out = 0;
stream->ts.pcr_in = 0;
stream->ts.pcr = -1;
stream->ts.pcr_current = -1;
stream->frames = 0;
stream->errors = 0;
stream->last_error_frame = -10000;
stream->last_error_count = 0;
}
void hb_ps_stream_reset(hb_stream_t *stream)
{
stream->need_keyframe = 0;
stream->pes.found_scr = 0;
stream->pes.scr = -1;
stream->frames = 0;
stream->errors = 0;
}
// ------------------------------------------------------------------
// Support for reading media files via the ffmpeg libraries.
static int ffmpeg_open( hb_stream_t *stream, hb_title_t *title, int scan )
{
AVFormatContext *info_ic = NULL, *reader_ic = NULL;
av_log_set_level( AV_LOG_ERROR );
// FFMpeg has issues with seeking. After av_find_stream_info, the
// streams are left in an indeterminate position. So a seek is
// necessary to force things back to the beginning of the stream.
// But then the seek fails for some stream types. So the safest thing
// to do seems to be to open 2 AVFormatContext. One for probing info
// and the other for reading.
if ( avformat_open_input( &info_ic, stream->path, NULL, NULL ) < 0 )
{
return 0;
}
if ( av_find_stream_info( info_ic ) < 0 )
goto fail;
title->opaque_priv = (void*)info_ic;
stream->ffmpeg_info_ic = info_ic;
if ( avformat_open_input( &reader_ic, stream->path, NULL, NULL ) < 0 )
{
goto fail;
}
stream->ffmpeg_reader_ic = reader_ic;
stream->hb_stream_type = ffmpeg;
stream->ffmpeg_pkt = malloc(sizeof(*stream->ffmpeg_pkt));
av_init_packet( stream->ffmpeg_pkt );
stream->chapter_end = INT64_MAX;
if ( !scan )
{
// we're opening for read. scan passed out codec params that
// indexed its stream so we need to remap them so they point
// to this stream.
stream->ffmpeg_video_id = title->video_id;
av_log_set_level( AV_LOG_ERROR );
}
else
{
// we're opening for scan. let ffmpeg put some info into the
// log about what we've got.
stream->ffmpeg_video_id = title->video_id;
av_log_set_level( AV_LOG_INFO );
av_dump_format( info_ic, 0, stream->path, 0 );
av_log_set_level( AV_LOG_ERROR );
// accept this file if it has at least one video stream we can decode
int i;
for (i = 0; i < info_ic->nb_streams; ++i )
{
if ( info_ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO )
{
break;
}
}
if ( i >= info_ic->nb_streams )
goto fail;
}
return 1;
fail:
if ( info_ic ) av_close_input_file( info_ic );
if ( reader_ic ) av_close_input_file( reader_ic );
return 0;
}
static void ffmpeg_close( hb_stream_t *d )
{
av_close_input_file( d->ffmpeg_info_ic );
av_close_input_file( d->ffmpeg_reader_ic );
if ( d->ffmpeg_pkt != NULL )
{
free( d->ffmpeg_pkt );
d->ffmpeg_pkt = NULL;
}
}
static void add_ffmpeg_audio( hb_title_t *title, hb_stream_t *stream, int id )
{
AVStream *st = stream->ffmpeg_info_ic->streams[id];
AVCodecContext *codec = st->codec;
AVDictionaryEntry *tag;
int layout;
// DTS: work around lack of 6.1 support in libhb
if( hb_ff_dts_request_5point1( codec ) )
{
hb_deep_log( 2, "add_ffmpeg_audio: found DTS-ES 6.1, requesting 5.1 core" );
}
// scan will ignore any audio without a bitrate. Since we've already
// typed the audio in order to determine its codec we set up the audio
// paramters here.
layout = hb_ff_layout_xlat( codec->channel_layout, codec->channels );
if ( !layout )
{
// Unsupported layout
return;
}
if ( codec->bit_rate || codec->sample_rate )
{
hb_audio_t *audio = calloc( 1, sizeof(*audio) );;
audio->id = id;
if ( codec->codec_id == CODEC_ID_AC3 )
{
audio->config.in.codec = HB_ACODEC_AC3;
}
else if ( codec->codec_id == CODEC_ID_DTS &&
( codec->profile == FF_PROFILE_DTS ||
codec->profile == FF_PROFILE_DTS_96_24 ) )
{
audio->config.in.codec = HB_ACODEC_DCA;
}
else
{
if ( codec->codec_id == CODEC_ID_DTS &&
( codec->profile == FF_PROFILE_DTS_ES ||
codec->profile == FF_PROFILE_DTS_HD_MA ||
codec->profile == FF_PROFILE_DTS_HD_HRA ) )
{
audio->config.in.codec = HB_ACODEC_DCA_HD;
}
else if ( codec->codec_id == CODEC_ID_AAC )
{
int len = MIN(codec->extradata_size, HB_CONFIG_MAX_SIZE);
memcpy(audio->priv.config.aac.bytes, codec->extradata, len);
audio->priv.config.aac.length = len;
audio->config.in.codec = HB_ACODEC_FFAAC;
}
else if ( codec->codec_id == CODEC_ID_MP3 )
{
audio->config.in.codec = HB_ACODEC_MP3;
}
else
{
audio->config.in.codec = HB_ACODEC_FFMPEG;
}
audio->config.in.codec_param = codec->codec_id;
audio->config.in.bitrate = codec->bit_rate? codec->bit_rate : 1;
audio->config.in.samplerate = codec->sample_rate;
audio->config.in.samples_per_frame = codec->frame_size;
audio->config.in.channel_layout = layout;
audio->config.in.channel_map = &hb_smpte_chan_map;
}
tag = av_dict_get( st->metadata, "language", NULL, 0 );
set_audio_description( stream, audio,
lang_for_code2( tag ? tag->value : "und" ) );
hb_list_add( title->list_audio, audio );
}
}
/*
* Format:
* MkvVobSubtitlePrivateData = ( Line )*
* Line = FieldName ':' ' ' FieldValue '\n'
* FieldName = [^:]+
* FieldValue = [^\n]+
*
* The line of interest is:
* PaletteLine = "palette" ':' ' ' RRGGBB ( ',' ' ' RRGGBB )*
*
* More information on the format at:
* http://www.matroska.org/technical/specs/subtitles/images.html
*/
static int ffmpeg_parse_vobsub_extradata_mkv( AVCodecContext *codec, hb_subtitle_t *subtitle )
{
// lines = (string) codec->extradata;
char *lines = malloc( codec->extradata_size + 1 );
if ( lines == NULL )
return 1;
memcpy( lines, codec->extradata, codec->extradata_size );
lines[codec->extradata_size] = '\0';
uint32_t rgb[16];
int gotPalette = 0;
int gotDimensions = 0;
char *curLine, *curLine_parserData;
for ( curLine = strtok_r( lines, "\n", &curLine_parserData );
curLine;
curLine = strtok_r( NULL, "\n", &curLine_parserData ) )
{
if (!gotPalette)
{
int numElementsRead = sscanf(curLine, "palette: "
"%06x, %06x, %06x, %06x, "
"%06x, %06x, %06x, %06x, "
"%06x, %06x, %06x, %06x, "
"%06x, %06x, %06x, %06x",
&rgb[0], &rgb[1], &rgb[2], &rgb[3],
&rgb[4], &rgb[5], &rgb[6], &rgb[7],
&rgb[8], &rgb[9], &rgb[10], &rgb[11],
&rgb[12], &rgb[13], &rgb[14], &rgb[15]);
if (numElementsRead == 16) {
gotPalette = 1;
}
}
if (!gotDimensions)
{
int numElementsRead = sscanf(curLine, "size: %dx%d",
&subtitle->width, &subtitle->height);
if (numElementsRead == 2) {
gotDimensions = 1;
}
}
if (gotPalette && gotDimensions)
break;
}
if (subtitle->width == 0 || subtitle->height == 0)
{
subtitle->width = 720;
subtitle->height = 480;
}
free( lines );
if ( gotPalette )
{
int i;
for (i=0; i<16; i++)
subtitle->palette[i] = hb_rgb2yuv(rgb[i]);
return 0;
}
else
{
return 1;
}
}
/*
* Format: 8-bit {0,Y,Cb,Cr} x 16
*/
static int ffmpeg_parse_vobsub_extradata_mp4( AVCodecContext *codec, hb_subtitle_t *subtitle )
{
if ( codec->extradata_size != 4*16 )
return 1;
int i, j;
for ( i=0, j=0; i<16; i++, j+=4 )
{
subtitle->palette[i] =
codec->extradata[j+1] << 16 | // Y
codec->extradata[j+2] << 8 | // Cb
codec->extradata[j+3] << 0; // Cr
}
if (codec->width <= 0 || codec->height <= 0)
{
subtitle->width = 720;
subtitle->height = 480;
}
else
{
subtitle->width = codec->width;
subtitle->height = codec->height;
}
return 0;
}
/*
* Parses the 'subtitle->palette' information from the specific VOB subtitle track's private data.
* Returns 0 if successful or 1 if parsing failed or was incomplete.
*/
static int ffmpeg_parse_vobsub_extradata( AVCodecContext *codec, hb_subtitle_t *subtitle )
{
// XXX: Better if we actually chose the correct parser based on the input container
return
ffmpeg_parse_vobsub_extradata_mkv( codec, subtitle ) &&
ffmpeg_parse_vobsub_extradata_mp4( codec, subtitle );
}
static void add_ffmpeg_subtitle( hb_title_t *title, hb_stream_t *stream, int id )
{
AVStream *st = stream->ffmpeg_info_ic->streams[id];
AVCodecContext *codec = st->codec;
hb_subtitle_t *subtitle = calloc( 1, sizeof(*subtitle) );
subtitle->id = id;
switch ( codec->codec_id )
{
case CODEC_ID_DVD_SUBTITLE:
subtitle->format = PICTURESUB;
subtitle->source = VOBSUB;
subtitle->config.dest = RENDERSUB; // By default render (burn-in) the VOBSUB.
if ( ffmpeg_parse_vobsub_extradata( codec, subtitle ) )
hb_log( "add_ffmpeg_subtitle: malformed extradata for VOB subtitle track; "
"subtitle colors likely to be wrong" );
break;
case CODEC_ID_TEXT:
subtitle->format = TEXTSUB;
subtitle->source = UTF8SUB;
subtitle->config.dest = PASSTHRUSUB;
break;
case CODEC_ID_MOV_TEXT: // TX3G
subtitle->format = TEXTSUB;
subtitle->source = TX3GSUB;
subtitle->config.dest = PASSTHRUSUB;
break;
case CODEC_ID_SSA:
subtitle->format = TEXTSUB;
subtitle->source = SSASUB;
subtitle->config.dest = PASSTHRUSUB;
break;
default:
hb_log( "add_ffmpeg_subtitle: unknown subtitle stream type: 0x%x", (int) codec->codec_id );
free(subtitle);
return;
}
AVDictionaryEntry *tag;
iso639_lang_t *language;
tag = av_dict_get( st->metadata, "language", NULL, 0 );
language = lang_for_code2( tag ? tag->value : "und" );
strcpy( subtitle->lang, language->eng_name );
strncpy( subtitle->iso639_2, language->iso639_2, 4 );
// Copy the extradata for the subtitle track
subtitle->extradata = malloc( codec->extradata_size );
memcpy( subtitle->extradata, codec->extradata, codec->extradata_size );
subtitle->extradata_size = codec->extradata_size;
hb_list_add(title->list_subtitle, subtitle);
}
static char *get_ffmpeg_metadata_value( AVDictionary *m, char *key )
{
AVDictionaryEntry *tag = NULL;
while ( (tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX)) )
{
if ( !strcmp( key, tag->key ) )
{
return tag->value;
}
}
return NULL;
}
static void add_ffmpeg_attachment( hb_title_t *title, hb_stream_t *stream, int id )
{
AVStream *st = stream->ffmpeg_info_ic->streams[id];
AVCodecContext *codec = st->codec;
enum attachtype type;
switch ( codec->codec_id )
{
case CODEC_ID_TTF:
type = FONT_TTF_ATTACH;
break;
default:
// Ignore unrecognized attachment type
return;
}
hb_attachment_t *attachment = calloc( 1, sizeof(*attachment) );
// Copy the attachment name and data
attachment->type = type;
attachment->name = strdup( get_ffmpeg_metadata_value( st->metadata, "filename" ) );
attachment->data = malloc( codec->extradata_size );
memcpy( attachment->data, codec->extradata, codec->extradata_size );
attachment->size = codec->extradata_size;
hb_list_add(title->list_attachment, attachment);
}
static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream, hb_title_t *title )
{
AVFormatContext *ic = stream->ffmpeg_info_ic;
// 'Barebones Title'
title->type = HB_FF_STREAM_TYPE;
title->index = 1;
// Copy part of the stream path to the title name
char *sep = strrchr(stream->path, '/');
if (sep)
strcpy(title->name, sep+1);
char *dot_term = strrchr(title->name, '.');
if (dot_term)
*dot_term = '\0';
uint64_t dur = ic->duration * 90000 / AV_TIME_BASE;
title->duration = dur;
dur /= 90000;
title->hours = dur / 3600;
title->minutes = ( dur % 3600 ) / 60;
title->seconds = dur % 60;
// set the title to decode the first video stream in the file
title->demuxer = HB_NULL_DEMUXER;
title->video_codec = 0;
int i;
for (i = 0; i < ic->nb_streams; ++i )
{
if ( ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
avcodec_find_decoder( ic->streams[i]->codec->codec_id ) &&
title->video_codec == 0 )
{
AVCodecContext *context = ic->streams[i]->codec;
if ( context->pix_fmt != PIX_FMT_YUV420P &&
!sws_isSupportedInput( context->pix_fmt ) )
{
hb_log( "ffmpeg_title_scan: Unsupported color space" );
continue;
}
title->video_id = i;
stream->ffmpeg_video_id = i;
if ( ic->streams[i]->sample_aspect_ratio.num &&
ic->streams[i]->sample_aspect_ratio.den )
{
title->pixel_aspect_width = ic->streams[i]->sample_aspect_ratio.num;
title->pixel_aspect_height = ic->streams[i]->sample_aspect_ratio.den;
}
if ( context->codec_id == CODEC_ID_H264 )
title->flags |= HBTF_NO_IDR;
title->video_codec = WORK_DECAVCODECV;
title->video_codec_param = context->codec_id;
}
else if ( ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
avcodec_find_decoder( ic->streams[i]->codec->codec_id ) )
{
add_ffmpeg_audio( title, stream, i );
}
else if ( ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
{
add_ffmpeg_subtitle( title, stream, i );
}
else if ( ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT )
{
add_ffmpeg_attachment( title, stream, i );
}
}
title->container_name = strdup( ic->iformat->name );
title->data_rate = ic->bit_rate;
hb_deep_log( 2, "Found ffmpeg %d chapters, container=%s", ic->nb_chapters, ic->iformat->name );
if( ic->nb_chapters != 0 )
{
AVChapter *m;
uint64_t duration_sum = 0;
for( i = 0; i < ic->nb_chapters; i++ )
if( ( m = ic->chapters[i] ) != NULL )
{
AVDictionaryEntry *tag;
hb_chapter_t * chapter;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
chapter->index = i+1;
chapter->duration = ( m->end / ( (double) m->time_base.num * m->time_base.den ) ) * 90000 - duration_sum;
duration_sum += chapter->duration;
chapter->hours = chapter->duration / 90000 / 3600;
chapter->minutes = ( ( chapter->duration / 90000 ) % 3600 ) / 60;
chapter->seconds = ( chapter->duration / 90000 ) % 60;
tag = av_dict_get( m->metadata, "title", NULL, 0 );
strcpy( chapter->title, tag ? tag->value : "" );
hb_deep_log( 2, "Added chapter %i, name='%s', dur=%"PRIu64", (%02i:%02i:%02i)",
chapter->index, chapter->title,
chapter->duration, chapter->hours,
chapter->minutes, chapter->seconds );
hb_list_add( title->list_chapter, chapter );
}
}
/*
* Fill the metadata.
*/
decmetadata( title );
if( hb_list_count( title->list_chapter ) == 0 )
{
// Need at least one chapter
hb_chapter_t * chapter;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
chapter->index = 1;
chapter->duration = title->duration;
chapter->hours = title->hours;
chapter->minutes = title->minutes;
chapter->seconds = title->seconds;
hb_list_add( title->list_chapter, chapter );
}
return title;
}
static int64_t av_to_hb_pts( int64_t pts, double conv_factor )
{
if ( pts == AV_NOPTS_VALUE )
return -1;
return (int64_t)( (double)pts * conv_factor );
}
static int ffmpeg_is_keyframe( hb_stream_t *stream )
{
uint8_t *pkt;
switch ( stream->ffmpeg_info_ic->streams[stream->ffmpeg_video_id]->codec->codec_id )
{
case CODEC_ID_VC1:
// XXX the VC1 codec doesn't mark key frames so to get previews
// we do it ourselves here. The decoder gets messed up if it
// doesn't get a SEQ header first so we consider that to be a key frame.
pkt = stream->ffmpeg_pkt->data;
if ( !pkt[0] && !pkt[1] && pkt[2] == 1 && pkt[3] == 0x0f )
return 1;
return 0;
case CODEC_ID_WMV3:
// XXX the ffmpeg WMV3 codec doesn't mark key frames.
// Only M$ could make I-frame detection this complicated: there
// are two to four bits of unused junk ahead of the frame type
// so we have to look at the sequence header to find out how much
// to skip. Then there are three different ways of coding the type
// depending on whether it's main or advanced profile then whether
// there are bframes or not so we have to look at the sequence
// header to get that.
pkt = stream->ffmpeg_pkt->data;
uint8_t *seqhdr = stream->ffmpeg_info_ic->streams[stream->ffmpeg_video_id]->codec->extradata;
int pshift = 2;
if ( ( seqhdr[3] & 0x02 ) == 0 )
// no FINTERPFLAG
++pshift;
if ( ( seqhdr[3] & 0x80 ) == 0 )
// no RANGEREDUCTION
++pshift;
if ( seqhdr[3] & 0x70 )
// stream has b-frames
return ( ( pkt[0] >> pshift ) & 0x3 ) == 0x01;
return ( ( pkt[0] >> pshift ) & 0x2 ) == 0;
default:
break;
}
return ( stream->ffmpeg_pkt->flags & AV_PKT_FLAG_KEY );
}
hb_buffer_t * hb_ffmpeg_read( hb_stream_t *stream )
{
int err;
hb_buffer_t * buf;
again:
if ( ( err = av_read_frame( stream->ffmpeg_reader_ic, stream->ffmpeg_pkt )) < 0 )
{
// av_read_frame can return EAGAIN. In this case, it expects
// to be called again to get more data.
if ( err == AVERROR(EAGAIN) )
{
goto again;
}
// XXX the following conditional is to handle avi files that
// use M$ 'packed b-frames' and occasionally have negative
// sizes for the null frames these require.
if ( err != AVERROR(ENOMEM) || stream->ffmpeg_pkt->size >= 0 )
// eof
return NULL;
}
if ( stream->ffmpeg_pkt->stream_index == stream->ffmpeg_video_id )
{
if ( stream->need_keyframe )
{
// we've just done a seek (generally for scan or live preview) and
// want to start at a keyframe. Some ffmpeg codecs seek to a key
// frame but most don't. So we spin until we either get a keyframe
// or we've looked through 50 video frames without finding one.
if ( ! ffmpeg_is_keyframe( stream ) && ++stream->need_keyframe < 50 )
{
av_free_packet( stream->ffmpeg_pkt );
goto again;
}
stream->need_keyframe = 0;
}
++stream->frames;
}
if ( stream->ffmpeg_pkt->size <= 0 )
{
// M$ "invalid and inefficient" packed b-frames require 'null frames'
// following them to preserve the timing (since the packing puts two
// or more frames in what looks like one avi frame). The contents and
// size of these null frames are ignored by the ff_h263_decode_frame
// as long as they're < 20 bytes. We need a positive size so we use
// one byte if we're given a zero or negative size. We don't know
// if the pkt data points anywhere reasonable so we just stick a
// byte of zero in our outbound buf.
buf = hb_buffer_init( 1 );
*buf->data = 0;
}
else
{
// sometimes we get absurd sizes from ffmpeg
if ( stream->ffmpeg_pkt->size >= (1 << 25) )
{
hb_log( "ffmpeg_read: pkt too big: %d bytes", stream->ffmpeg_pkt->size );
av_free_packet( stream->ffmpeg_pkt );
return hb_ffmpeg_read( stream );
}
buf = hb_buffer_init( stream->ffmpeg_pkt->size );
memcpy( buf->data, stream->ffmpeg_pkt->data, stream->ffmpeg_pkt->size );
}
buf->id = stream->ffmpeg_pkt->stream_index;
// compute a conversion factor to go from the ffmpeg
// timebase for the stream to HB's 90kHz timebase.
AVStream *s = stream->ffmpeg_info_ic->streams[stream->ffmpeg_pkt->stream_index];
double tsconv = 90000. * (double)s->time_base.num / (double)s->time_base.den;
buf->start = av_to_hb_pts( stream->ffmpeg_pkt->pts, tsconv );
buf->renderOffset = av_to_hb_pts( stream->ffmpeg_pkt->dts, tsconv );
if ( buf->renderOffset >= 0 && buf->start == -1 )
{
buf->start = buf->renderOffset;
}
else if ( buf->renderOffset == -1 && buf->start >= 0 )
{
buf->renderOffset = buf->start;
}
/*
* Fill out buf->stop for subtitle packets
*
* libavcodec's MKV demuxer stores the duration of UTF-8 subtitles (CODEC_ID_TEXT)
* in the 'convergence_duration' field for some reason.
*
* Other subtitles' durations are stored in the 'duration' field.
*
* VOB subtitles (CODEC_ID_DVD_SUBTITLE) do not have their duration stored in
* either field. This is not a problem because the VOB decoder can extract this
* information from the packet payload itself.
*
* SSA subtitles (CODEC_ID_SSA) do not have their duration stored in
* either field. This is not a problem because the SSA decoder can extract this
* information from the packet payload itself.
*/
enum CodecID ffmpeg_pkt_codec;
enum AVMediaType codec_type;
ffmpeg_pkt_codec = stream->ffmpeg_info_ic->streams[stream->ffmpeg_pkt->stream_index]->codec->codec_id;
codec_type = stream->ffmpeg_info_ic->streams[stream->ffmpeg_pkt->stream_index]->codec->codec_type;
switch ( codec_type )
{
case AVMEDIA_TYPE_VIDEO:
buf->type = VIDEO_BUF;
break;
case AVMEDIA_TYPE_AUDIO:
buf->type = AUDIO_BUF;
break;
case AVMEDIA_TYPE_SUBTITLE:
buf->type = SUBTITLE_BUF;
break;
default:
buf->type = OTHER_BUF;
break;
}
if ( ffmpeg_pkt_codec == CODEC_ID_TEXT ) {
int64_t ffmpeg_pkt_duration = stream->ffmpeg_pkt->convergence_duration;
int64_t buf_duration = av_to_hb_pts( ffmpeg_pkt_duration, tsconv );
buf->stop = buf->start + buf_duration;
}
if ( ffmpeg_pkt_codec == CODEC_ID_MOV_TEXT ) {
int64_t ffmpeg_pkt_duration = stream->ffmpeg_pkt->duration;
int64_t buf_duration = av_to_hb_pts( ffmpeg_pkt_duration, tsconv );
buf->stop = buf->start + buf_duration;
}
/*
* Check to see whether this buffer is on a chapter
* boundary, if so mark it as such in the buffer then advance
* chapter_end to the end of the next chapter.
* If there are no chapters, chapter_end is always initialized to INT64_MAX
* (roughly 3 million years at our 90KHz clock rate) so the test
* below handles both the chapters & no chapters case.
*/
if ( stream->ffmpeg_pkt->stream_index == stream->ffmpeg_video_id &&
buf->start >= stream->chapter_end )
{
hb_chapter_t *chapter = hb_list_item( stream->title->list_chapter,
stream->chapter+1 );
if( chapter )
{
stream->chapter++;
stream->chapter_end += chapter->duration;
buf->new_chap = stream->chapter + 1;
hb_deep_log( 2, "ffmpeg_read starting chapter %i at %"PRId64,
buf->new_chap, buf->start);
} else {
// Must have run out of chapters, stop looking.
stream->chapter_end = INT64_MAX;
}
} else {
buf->new_chap = 0;
}
av_free_packet( stream->ffmpeg_pkt );
return buf;
}
static int ffmpeg_seek( hb_stream_t *stream, float frac )
{
AVFormatContext *ic = stream->ffmpeg_reader_ic;
if ( frac > 0. )
{
int64_t pos = (double)stream->ffmpeg_info_ic->duration * (double)frac +
ffmpeg_initial_timestamp( stream );
avformat_seek_file( ic, -1, 0, pos, pos, AVSEEK_FLAG_BACKWARD);
}
else
{
int64_t pos = ffmpeg_initial_timestamp( stream );
avformat_seek_file( ic, -1, 0, pos, pos, AVSEEK_FLAG_BACKWARD);
}
stream->need_keyframe = 1;
return 1;
}
// Assumes that we are always seeking forward
static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts )
{
AVFormatContext *ic = stream->ffmpeg_reader_ic;
int64_t pos;
int ret;
pos = ts * AV_TIME_BASE / 90000 + ffmpeg_initial_timestamp( stream );
AVStream *st = stream->ffmpeg_info_ic->streams[stream->ffmpeg_video_id];
// timebase must be adjusted to match timebase of stream we are
// using for seeking.
pos = av_rescale(pos, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
stream->need_keyframe = 1;
// Seek to the nearest timestamp before that requested where
// there is an I-frame
ret = avformat_seek_file( ic, stream->ffmpeg_video_id, 0, pos, pos, 0);
return ret;
}