/* $Id$
This file is part of the HandBrake source code.
Homepage: .
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "lang.h"
#include "a52dec/a52.h"
#include
#define min(a, b) a < b ? a : b
typedef enum { hb_stream_type_unknown = 0, hb_stream_type_transport, hb_stream_type_program } hb_stream_type_t;
#define kMaxNumberDecodeStreams 8
#define kMaxNumberVideoPIDS 16
#define kMaxNumberAudioPIDS 32
//#define kVideoStream 0
//#define kAudioStream 1
#define kNumDecodeBuffers 2
#define kMaxNumberPMTStreams 32
#define CLOCKRATE ((int64_t)27000000) // MPEG System clock rate
#define STREAMRATE ((int64_t)2401587) // Original HD stream rate 19.2 Mbps
#define DEMUX (((int)STREAMRATE * 8) / 50)// Demux value for HD content STREAMRATE / 50
struct hb_stream_s
{
char * path;
FILE * file_handle;
hb_stream_type_t stream_type;
int ps_current_write_buffer_index;
int ps_current_read_buffer_index;
struct {
int size;
int len;
int read_pos;
int write_pos;
unsigned char * data;
} ps_decode_buffer[kNumDecodeBuffers];
struct {
int lang_code;
int flags;
int rate;
int bitrate;
} a52_info[kMaxNumberAudioPIDS];
int ts_video_pids[kMaxNumberVideoPIDS];
int ts_audio_pids[kMaxNumberAudioPIDS];
int ts_number_video_pids;
int ts_number_audio_pids;
int ts_selected_audio_pid_index;
unsigned char* ts_packetbuf[kMaxNumberDecodeStreams];
int ts_packetpos[kMaxNumberDecodeStreams];
// int ts_bufpackets[kMaxNumberDecodeStreams];
int ts_foundfirst[kMaxNumberDecodeStreams];
int ts_skipbad[kMaxNumberDecodeStreams];
int ts_streamcont[kMaxNumberDecodeStreams];
int ts_streamid[kMaxNumberDecodeStreams];
int ts_audio_stream_type[kMaxNumberAudioPIDS];
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;
int section_length;
int program_number;
unsigned int PCR_PID;
int program_info_length;
unsigned char *progam_info_descriptor_data;
struct
{
unsigned char stream_type;
unsigned short elementary_PID;
unsigned short ES_info_length;
unsigned char *es_info_descriptor_data;
} pmt_stream_info[kMaxNumberPMTStreams];
} pmt_info;
};
/***********************************************************************
* Local prototypes
**********************************************************************/
static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle);
static void hb_ts_stream_init(hb_stream_t *stream);
static void hb_ts_stream_find_pids(hb_stream_t *stream);
static void hb_ts_stream_decode(hb_stream_t *stream);
static void hb_ts_stream_reset(hb_stream_t *stream);
static void hb_stream_put_back(hb_stream_t *stream, int i);
static void hb_stream_set_audio_id_and_codec(hb_stream_t *stream, hb_audio_t *audio);
int hb_stream_is_stream_type( char * path )
{
if ((strstr(path,".mpg") != NULL) ||
(strstr(path,".vob") != NULL) ||
(strstr(path, ".VOB") != NULL) ||
(strstr(path, ".mpeg") != NULL) ||
(strstr(path,".ts") != NULL) ||
(strstr(path, ".m2t") != NULL) ||
(strstr(path, ".TS") != NULL))
{
return 1;
}
else
return 0;
}
/***********************************************************************
* hb_stream_open
***********************************************************************
*
**********************************************************************/
hb_stream_t * hb_stream_open( char * path )
{
hb_stream_t * d;
d = calloc( sizeof( hb_stream_t ), 1 );
/* Open device */
if( !( d->file_handle = fopen( path, "rb" ) ) )
{
hb_log( "hb_stream_open: fopen failed (%s)", path );
goto fail;
}
d->path = strdup( path );
if ( ( strstr(d->path,".ts") != NULL) || ( strstr(d->path,".m2t") != NULL) || ( strstr(d->path,".TS") != NULL) )
{
d->stream_type = hb_stream_type_transport;
hb_ts_stream_init(d);
}
else if (( strstr(d->path,".mpg") != NULL) || ( strstr(d->path,".vob") != NULL) || ( strstr(d->path,".mpeg") != NULL) || ( strstr(d->path,".VOB") != NULL))
{
d->stream_type = hb_stream_type_program;
}
return d;
fail:
free( d );
return NULL;
}
/***********************************************************************
* hb_stream_close
***********************************************************************
* Closes and frees everything
**********************************************************************/
void hb_stream_close( hb_stream_t ** _d )
{
hb_stream_t * d = *_d;
if( d->file_handle )
{
fclose( d->file_handle );
d->file_handle = NULL;
}
int i=0;
for (i = 0; i < kNumDecodeBuffers; i++)
{
if (d->ps_decode_buffer[i].data)
{
free(d->ps_decode_buffer[i].data);
d->ps_decode_buffer[i].data = NULL;
}
}
for (i = 0; i < kMaxNumberDecodeStreams; i++)
{
if (d->ts_packetbuf[i])
{
free(d->ts_packetbuf[i]);
d->ts_packetbuf[i] = NULL;
}
}
free( d );
*_d = NULL;
}
/***********************************************************************
* hb_ps_stream_title_scan
***********************************************************************
*
**********************************************************************/
hb_title_t * hb_stream_title_scan(hb_stream_t *stream)
{
// 'Barebones Title'
hb_title_t *aTitle = hb_title_init( stream->path, 0 );
// Copy part of the stream path to the title name
char *sep = strrchr(stream->path, '/');
if (sep)
strcpy(aTitle->name, sep+1);
char *dot_term = strrchr(aTitle->name, '.');
if (dot_term)
*dot_term = '\0';
// Height, width, rate and aspect ratio information is filled in when the previews are built
hb_stream_duration(stream, aTitle);
// One Chapter
hb_chapter_t * chapter;
chapter = calloc( sizeof( hb_chapter_t ), 1 );
chapter->index = 1;
chapter->duration = aTitle->duration;
chapter->hours = aTitle->hours;
chapter->minutes = aTitle->minutes;
chapter->seconds = aTitle->seconds;
hb_list_add( aTitle->list_chapter, chapter );
int i=0, num_audio_tracks = 1;
if (stream->stream_type == hb_stream_type_transport)
{
num_audio_tracks = stream->ts_number_audio_pids;
}
for (i=0; i < num_audio_tracks ; i++)
{
// Basic AC-3 Audio track
hb_audio_t * audio;
audio = calloc( sizeof( hb_audio_t ), 1 );
audio->source_pid = stream->ts_audio_pids[i];
hb_stream_set_audio_id_and_codec(stream, audio);
hb_list_add( aTitle->list_audio, audio );
}
return aTitle;
}
/***********************************************************************
* hb_stream_duration
***********************************************************************
*
**********************************************************************/
void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
{
// VOB Files often have exceedingly unusual PTS values in them - they will progress for a while
// and then reset without warning !
if (strstr(stream->path,".vob") != NULL)
{
// So we'll use a 'fake duration' that should give enough time !
int64_t duration = 4 * 3600 * 90000;
inTitle->duration = duration; //90LL * dvdtime2msec( &d->pgc->playback_time );
inTitle->hours = inTitle->duration / 90000 / 3600;
inTitle->minutes = ( ( inTitle->duration / 90000 ) % 3600 ) / 60;
inTitle->seconds = ( inTitle->duration / 90000 ) % 60;
return;
}
unsigned char *buf = (unsigned char *) malloc(4096);
int done = 0;
off_t cur_pos;
int64_t first_pts = 0, last_pts = 0;
// To calculate the duration we look for the first and last presentation time stamps in the stream for video data
// and then use the delta
while (!done)
{
cur_pos = ftello(stream->file_handle);
if (fread(buf, 4096, 1, stream->file_handle) == 1)
{
int i=0;
for (i=0; (i <= 4092) && !done; i++)
{
if ((buf[i] == 0x00) && (buf[i+1] == 0x00) && (buf[i+2] == 0x01) && (buf[i+3] == 0xe0)) // Found a Video Stream
{
// Now look for a PTS field - we need to make sure we have enough space so we back up a little and read
// some more data
fseeko(stream->file_handle, cur_pos + i, SEEK_SET);
if (fread(buf, 4096, 1, stream->file_handle) == 1)
{
int has_pts = ( ( buf[7] >> 6 ) & 0x2 ) ? 1 : 0;
if (has_pts)
{
first_pts = ( ( ( (uint64_t) buf[9] >> 1 ) & 0x7 ) << 30 ) +
( buf[10] << 22 ) +
( ( buf[11] >> 1 ) << 15 ) +
( buf[12] << 7 ) +
( buf[13] >> 1 );
done = 1;
}
else
{
fseeko(stream->file_handle, cur_pos, SEEK_SET);
fread(buf, 4096, 1, stream->file_handle);
}
}
}
}
}
else
done = 1; // End of data;
}
// Now work back from the end of the stream
fseeko(stream->file_handle,0 ,SEEK_END);
done = 0;
while (!done)
{
// Back up a little
if (fseeko(stream->file_handle, -4096, SEEK_CUR) < 0)
{
done = 1;
break;
}
cur_pos = ftello(stream->file_handle);
if (fread(buf, 4096, 1, stream->file_handle) == 1)
{
int i=0;
for (i=4092; (i >= 0) && !done; i--)
{
if ((buf[i] == 0x00) && (buf[i+1] == 0x00) && (buf[i+2] == 0x01) && (buf[i+3] == 0xe0)) // Found a Video Stream
{
// Now look for a PTS field - we need to make sure we have enough space so we back up a little and read
// some more data
fseeko(stream->file_handle, cur_pos + i, SEEK_SET);
fread(buf, 1, 4096, stream->file_handle);
unsigned char pts_dts_flag = buf[7];
int has_pts = ( ( buf[7] >> 6 ) & 0x2 ) ? 1 : 0;
if (has_pts)
{
last_pts = ( ( ( (uint64_t) buf[9] >> 1 ) & 0x7 ) << 30 ) +
( buf[10] << 22 ) +
( ( buf[11] >> 1 ) << 15 ) +
( buf[12] << 7 ) +
( buf[13] >> 1 );
done = 1;
}
else
{
// Re Read the original data and carry on (i is still valid in the old buffer)
fseeko(stream->file_handle, cur_pos, SEEK_SET);
fread(buf, 4096, 1, stream->file_handle);
}
}
}
fseeko(stream->file_handle, -4096, SEEK_CUR); // 'Undo' the last read
}
else
done = 1; // End of data;
}
free(buf);
int64_t duration = last_pts - first_pts;
inTitle->duration = duration; //90LL * dvdtime2msec( &d->pgc->playback_time );
inTitle->hours = inTitle->duration / 90000 / 3600;
inTitle->minutes = ( ( inTitle->duration / 90000 ) % 3600 ) / 60;
inTitle->seconds = ( inTitle->duration / 90000 ) % 60;
}
/***********************************************************************
* hb_stream_read
***********************************************************************
*
**********************************************************************/
int hb_stream_read( hb_stream_t * src_stream, hb_buffer_t * b )
{
if (src_stream->stream_type == hb_stream_type_program)
{
size_t amt_read;
amt_read = fread(b->data, HB_DVD_READ_BUFFER_SIZE, 1, src_stream->file_handle);
if (amt_read > 0)
return 1;
else
return 0;
}
else if (src_stream->stream_type == hb_stream_type_transport)
{
int read_buffer_index = src_stream->ps_current_read_buffer_index;
// Transport streams are a little more complex - we might be able to just
// read from the transport stream conversion buffer (if there's enough data)
// or we may need to transfer what's left and fill it again.
if (src_stream->ps_decode_buffer[read_buffer_index].len - src_stream->ps_decode_buffer[read_buffer_index].read_pos > HB_DVD_READ_BUFFER_SIZE)
{
memcpy(b->data, src_stream->ps_decode_buffer[read_buffer_index].data + src_stream->ps_decode_buffer[read_buffer_index].read_pos,HB_DVD_READ_BUFFER_SIZE);
src_stream->ps_decode_buffer[read_buffer_index].read_pos += HB_DVD_READ_BUFFER_SIZE;
return 1;
}
else
{
// Not quite enough data in the buffer - transfer what is present, fill the buffer and then
// transfer what's still needed.
int transfer_size = HB_DVD_READ_BUFFER_SIZE;
int amt_avail_to_transfer = src_stream->ps_decode_buffer[read_buffer_index].len - src_stream->ps_decode_buffer[read_buffer_index].read_pos;
memcpy(b->data, src_stream->ps_decode_buffer[read_buffer_index].data + src_stream->ps_decode_buffer[read_buffer_index].read_pos, amt_avail_to_transfer);
transfer_size -= amt_avail_to_transfer;
src_stream->ps_decode_buffer[read_buffer_index].read_pos += amt_avail_to_transfer;
// Give up this buffer - decoding may well need it, and we're done
src_stream->ps_decode_buffer[read_buffer_index].write_pos = 0;
src_stream->ps_decode_buffer[read_buffer_index].len = 0;
// Fill the buffer
hb_ts_stream_decode(src_stream);
// Decoding will almost certainly have changed the current read buffer index
read_buffer_index = src_stream->ps_current_read_buffer_index;
if (src_stream->ps_decode_buffer[read_buffer_index].len == 0)
{
hb_log("hb_stream_read - buffer after decode has zero length data");
return 0;
}
// Read the bit we still need
memcpy(b->data+amt_avail_to_transfer, src_stream->ps_decode_buffer[read_buffer_index].data + src_stream->ps_decode_buffer[read_buffer_index].read_pos,transfer_size);
src_stream->ps_decode_buffer[read_buffer_index].read_pos += transfer_size;
return 1;
}
}
else
return 0;
}
/***********************************************************************
* hb_stream_seek
***********************************************************************
*
**********************************************************************/
int hb_stream_seek( hb_stream_t * src_stream, float f )
{
off_t stream_size, cur_pos, new_pos;
double pos_ratio = f;
cur_pos = ftello(src_stream->file_handle);
fseeko(src_stream->file_handle,0 ,SEEK_END);
stream_size = ftello(src_stream->file_handle);
new_pos = (off_t) ((double) (stream_size) * pos_ratio);
int r = fseeko(src_stream->file_handle, new_pos, SEEK_SET);
if (r == -1)
{
fseeko(src_stream->file_handle, cur_pos, SEEK_SET);
return 0;
}
if (src_stream->stream_type == 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(src_stream);
}
// Now we must scan forwards for a valid start code (0x000001BA)
int done = 0;
hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
while (!done)
{
if (hb_stream_read(src_stream,buf) == 1)
{
int i=0;
for (i=0; (i <= HB_DVD_READ_BUFFER_SIZE-4) && (!done); i++)
{
if ((buf->data[i] == 0x00) && (buf->data[i+1] == 0x00) && (buf->data[i+2] == 0x01) && (buf->data[i+3] == 0xba))
{
done = 1;
// 'Put Back' the data we've just read (up to this point)
hb_stream_put_back(src_stream, i);
}
}
}
else
done = 1; // End of data;
}
hb_buffer_close(&buf);
return 1;
}
/***********************************************************************
* hb_stream_set_audio_id_and_codec
***********************************************************************
*
**********************************************************************/
void hb_stream_set_audio_id_and_codec(hb_stream_t *stream, hb_audio_t *audio)
{
off_t cur_pos;
cur_pos = ftello(stream->file_handle);
int done = 0;
hb_buffer_t *buf = NULL;
int cur_audio_pid_index = stream->ts_selected_audio_pid_index;
if (stream->stream_type == hb_stream_type_transport)
{
int i=0;
for (i=0; i < stream->ts_number_audio_pids; i++)
{
if (stream->ts_audio_pids[i] == audio->source_pid)
{
stream->ts_selected_audio_pid_index = i;
break;
}
}
}
//Start at the beginning of the stream
hb_stream_seek(stream, 0.0f);
// Now we must scan forwards for a valid audio start code (0x000001xx)
buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
while (!done)
{
if (hb_stream_read(stream, buf) == 1)
{
int i=0;
for (i=0; (i <= HB_DVD_READ_BUFFER_SIZE-4) && (!done); i++)
{
if ((buf->data[i] == 0x00) && (buf->data[i+1] == 0x00) && (buf->data[i+2] == 0x01))
{
if (buf->data[i+3] == 0xbd)
{
audio->id = 0x80bd;
audio->codec = HB_ACODEC_AC3;
done = 1;
}
else if ((buf->data[i+3] & 0xe0) == 0xc0)
{
audio->id = buf->data[i+3];
audio->codec = HB_ACODEC_MPGA;
done = 1;
}
}
}
}
else
done = 1; // End of data;
}
hb_buffer_close(&buf);
fseeko(stream->file_handle, cur_pos, SEEK_SET);
stream->ts_selected_audio_pid_index = cur_audio_pid_index;
}
/***********************************************************************
* hb_stream_update_audio
***********************************************************************
*
**********************************************************************/
void hb_stream_update_audio(hb_stream_t *stream, hb_audio_t *audio)
{
iso639_lang_t *lang;
if (stream->stream_type == hb_stream_type_program)
{
lang = lang_for_code(0x0000);
}
else if (stream->stream_type == hb_stream_type_transport)
{
// Find the audio stream info for this PID
int i=0;
for (i=0; i < stream->ts_number_audio_pids; i++)
{
if (stream->ts_audio_pids[i] == audio->source_pid)
break;
}
if (i == stream->ts_number_audio_pids)
{
hb_log("hb_stream_update_audio - cannot find PID 0x%x (%d) in ts_audio_pids list !", audio->source_pid, audio->source_pid);
return;
}
lang = lang_for_code(stream->a52_info[i].lang_code);
if (!audio->rate)
audio->rate = stream->a52_info[i].rate;
if (!audio->bitrate)
audio->bitrate = stream->a52_info[i].bitrate;
if (!audio->config.a52.ac3flags)
audio->config.a52.ac3flags = audio->ac3flags = stream->a52_info[i].flags;
}
if (!audio->input_channel_layout)
{
switch( audio->ac3flags & A52_CHANNEL_MASK )
{
/* mono sources */
case A52_MONO:
case A52_CHANNEL1:
case A52_CHANNEL2:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_MONO;
break;
/* stereo input */
case A52_CHANNEL:
case A52_STEREO:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
break;
/* dolby (DPL1 aka Dolby Surround = 4.0 matrix-encoded) input */
case A52_DOLBY:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_DOLBY;
break;
/* 3F/2R input */
case A52_3F2R:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
break;
/* 3F/1R input */
case A52_3F1R:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F1R;
break;
/* other inputs */
case A52_3F:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F;
break;
case A52_2F1R:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_2F1R;
break;
case A52_2F2R:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_2F2R;
break;
/* unknown */
default:
audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
}
/* add in our own LFE flag if the source has LFE */
if (audio->ac3flags & A52_LFE)
{
audio->input_channel_layout = audio->input_channel_layout | HB_INPUT_CH_LAYOUT_HAS_LFE;
}
}
snprintf( audio->lang, sizeof( audio->lang ), "%s (%s)", strlen(lang->native_name) ? lang->native_name : lang->eng_name,
audio->codec == HB_ACODEC_AC3 ? "AC3" : ( audio->codec == HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) );
snprintf( audio->lang_simple, sizeof( audio->lang_simple ), "%s", strlen(lang->native_name) ? lang->native_name : lang->eng_name );
snprintf( audio->iso639_2, sizeof( audio->iso639_2 ), "%s", lang->iso639_2);
if ( (audio->ac3flags & A52_CHANNEL_MASK) == A52_DOLBY ) {
sprintf( audio->lang + strlen( audio->lang ),
" (Dolby Surround)" );
} else {
sprintf( audio->lang + strlen( audio->lang ),
" (%d.%d ch)",
HB_INPUT_CH_LAYOUT_GET_DISCRETE_FRONT_COUNT(audio->input_channel_layout) +
HB_INPUT_CH_LAYOUT_GET_DISCRETE_REAR_COUNT(audio->input_channel_layout),
HB_INPUT_CH_LAYOUT_GET_DISCRETE_LFE_COUNT(audio->input_channel_layout));
}
hb_log( "hb_stream_update_audio: id=%x, lang=%s, 3cc=%s, rate = %d, bitrate = %d, flags = 0x%x (%d)", audio->id, audio->lang, audio->iso639_2, audio->rate, audio->bitrate, audio->ac3flags, audio->ac3flags );
}
void hb_stream_set_selected_audio_pid_index(hb_stream_t *stream, int i)
{
stream->ts_selected_audio_pid_index = i;
}
/***********************************************************************
* hb_stream_put_back
***********************************************************************
*
**********************************************************************/
static void hb_stream_put_back(hb_stream_t *stream, int i)
{
if (stream->stream_type == hb_stream_type_program)
{
// Program streams are pretty easy - we just reposition the source file
// pointer
fseeko(stream->file_handle, -(HB_DVD_READ_BUFFER_SIZE-i), SEEK_CUR);
}
else if (stream->stream_type == hb_stream_type_transport)
{
int read_buffer_index = stream->ps_current_read_buffer_index;
// Transport streams are a little more tricky - so long as the
// amount to back up is still within the current decode buffer
// we can just adjust the read pos.
if (stream->ps_decode_buffer[read_buffer_index].read_pos - i > 0)
{
stream->ps_decode_buffer[read_buffer_index].read_pos -= i;
}
else
hb_error("hb_stream_put_back - trying to step beyond the start of the buffer, read_pos = %d amt to put back = %d\n", stream->ps_decode_buffer[read_buffer_index].read_pos, i);
}
}
/***********************************************************************
* hb_ts_stream_init
***********************************************************************
*
**********************************************************************/
#define PS_DECODE_BUFFER_SIZE ( 1024 * 1024 * 4)
static void hb_ts_stream_init(hb_stream_t *stream)
{
// Output Program Stream
int i=0;
for (i=0; i < kNumDecodeBuffers; i++)
{
stream->ps_decode_buffer[i].data = (unsigned char *) malloc(PS_DECODE_BUFFER_SIZE);
stream->ps_decode_buffer[i].read_pos = 0;
stream->ps_decode_buffer[i].size = PS_DECODE_BUFFER_SIZE;
stream->ps_decode_buffer[i].len = 0;
stream->ps_decode_buffer[i].write_pos = 0;
}
for (i=0; i < kMaxNumberDecodeStreams; i++)
{
stream->ts_streamcont[i] = -1;
}
stream->ps_current_write_buffer_index = 0;
stream->ps_current_read_buffer_index = 1;
// This is the index (in ts_audio_pids) of the selected
// output stream. It should not be set until after all the
// pids in the stream have been discovered.
stream->ts_selected_audio_pid_index = -1;
// Find the audio and video pids in the stream
hb_ts_stream_find_pids(stream);
for (i=0; i < stream->ts_number_video_pids; i++)
{
// In progress audio/video data during the transport stream -> program stream processing
stream->ts_packetbuf[i] = (unsigned char *) malloc(1024 * 1024);
stream->ts_streamid[i] = 0xE0; // Stream is Video
}
for (i = stream->ts_number_video_pids; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
stream->ts_packetbuf[i] = (unsigned char *) malloc(1024 * 1024);
stream->ts_streamid[i] = 0xBD; // Stream 1 is AC-3 Audio
}
}
// ------------------------------------------------------------------------------------
off_t align_to_next_packet(FILE* f)
{
unsigned char buf[188*20];
off_t start = ftello(f);
off_t pos = 0;
if (fread(buf, 188*20, 1, f) == 1)
{
int found = 0;
while (!found && (pos < 188))
{
found = 1;
int i = 0;
for (i = 0; i < 188*20; i += 188)
{
unsigned char c = buf[pos+i];
// Check sync byte
if ((c != 0x47) && (c != 0x72) && (c != 0x29))
{
// this offset failed, try next
found = 0;
pos++;
break;
}
}
}
}
if (pos == 188)
pos = 0; // failed to find anything!!!!!?
fseek(f, start+pos, SEEK_SET);
return pos;
}
// ------------------------------------------------------------------------------------
int bitpos = 0;
unsigned int bitval = 0;
unsigned char* bitbuf = NULL;
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 set_buf(unsigned char* buf, int bufsize, int clear)
{
bitpos = 0;
bitbuf = buf;
bitval = (bitbuf[0] << 24) | (bitbuf[1] << 16) | (bitbuf[2] << 8) | bitbuf[3];
if (clear)
memset(bitbuf, 0, bufsize);
}
static inline int buf_size()
{
return bitpos >> 3;
}
static inline void set_bits(unsigned int val, int bits)
{
val &= bitmask[bits];
while (bits > 0)
{
int bitsleft = (8 - (bitpos & 7));
if (bits >= bitsleft)
{
bitbuf[bitpos >> 3] |= val >> (bits - bitsleft);
bitpos += bitsleft;
bits -= bitsleft;
val &= bitmask[bits];
}
else
{
bitbuf[bitpos >> 3] |= val << (bitsleft - bits);
bitpos += bits;
bits = 0;
}
}
}
static inline unsigned int get_bits(int bits)
{
unsigned int val;
int left = 32 - (bitpos & 31);
if (bits < left)
{
val = (bitval >> (left - bits)) & bitmask[bits];
bitpos += bits;
}
else
{
val = (bitval & bitmask[left]) << (bits - left);
bitpos += left;
bits -= left;
int pos = bitpos >> 3;
bitval = (bitbuf[pos] << 24) | (bitbuf[pos + 1] << 16) | (bitbuf[pos + 2] << 8) | bitbuf[pos + 3];
if (bits > 0)
{
val |= (bitval >> (32 - bits)) & bitmask[bits];
bitpos += bits;
}
}
return val;
}
int decode_program_map(hb_stream_t* stream)
{
unsigned int pos = 0;
set_buf(stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
unsigned char table_id = get_bits(8);
get_bits(4);
unsigned int section_length = get_bits(12);
stream->pmt_info.section_length = section_length;
unsigned int program_number = get_bits(16);
stream->pmt_info.program_number = program_number;
get_bits(2);
unsigned char version_number = get_bits(5);
get_bits(1);
unsigned char section_number = get_bits(8);
unsigned char last_section_number = get_bits(8);
get_bits(3);
unsigned int PCR_PID = get_bits(13);
stream->pmt_info.PCR_PID = PCR_PID;
get_bits(4);
unsigned int program_info_length = get_bits(12);
stream->pmt_info.program_info_length = program_info_length;
int i=0;
unsigned char *descriptor_buf = (unsigned char *) malloc(program_info_length);
for (i = 0; i < program_info_length; i++)
{
descriptor_buf[i] = get_bits(8);
}
int cur_pos = 9 /* data after the section length field*/ + program_info_length;
int done_reading_stream_types = 0;
while (!done_reading_stream_types)
{
unsigned char stream_type = get_bits(8);
get_bits(3);
unsigned int elementary_PID = get_bits(13);
get_bits(4);
unsigned int ES_info_length = get_bits(12);
int i=0;
unsigned char *ES_info_buf = (unsigned char *) malloc(ES_info_length);
for (i=0; i < ES_info_length; i++)
{
ES_info_buf[i] = get_bits(8);
}
if (stream_type == 0x02)
{
if (stream->ts_number_video_pids <= kMaxNumberVideoPIDS)
stream->ts_number_video_pids++;
stream->ts_video_pids[stream->ts_number_video_pids-1] = elementary_PID;
}
if ((stream_type == 0x04) || (stream_type == 0x81) || (stream_type == 0x03) || (stream_type == 0x06)) // ATSC Defines stream type 0x81 for AC-3/A52 audio, there's also some evidence of streams using type 6 for AC-3 audio too
{
if (stream->ts_number_audio_pids <= kMaxNumberAudioPIDS)
stream->ts_number_audio_pids++;
stream->ts_audio_pids[stream->ts_number_audio_pids-1] = elementary_PID;
stream->a52_info[stream->ts_number_audio_pids-1].lang_code = 'e' << 8 | 'n';
stream->ts_audio_stream_type[stream->ts_number_audio_pids-1] = stream_type;
if (ES_info_length > 0)
{
hb_log("decode_program_map - Elementary Stream Info Present, decode language codes ?");
}
}
cur_pos += 5 /* stream header */ + ES_info_length;
free(ES_info_buf);
if (cur_pos >= section_length - 4 /* stop before the CRC */)
done_reading_stream_types = 1;
}
free(descriptor_buf);
return 1;
}
// ------------------------------------------------------------------------------------
int build_program_map(unsigned char *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 && stream->pmt_info.reading)
{
// 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;
}
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;
}
return 0;
}
int decode_PAT(unsigned char *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)
{
set_buf(tablebuf + pos, tablepos - pos, 0);
unsigned char section_id = get_bits(8);
get_bits(4);
unsigned int section_len = get_bits(12);
unsigned int transport_id = get_bits(16);
get_bits(2);
unsigned int version_num = get_bits(5);
unsigned int current_next = get_bits(1);
unsigned int section_num = get_bits(8);
unsigned int last_section = get_bits(8);
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 = get_bits(16);
stream->pat_info[stream->ts_number_pat_entries].program_number = pkt_program_num;
get_bits(3); // Reserved
if (pkt_program_num == 0)
{
unsigned int pkt_network_PID = get_bits(13);
}
else
{
unsigned int pkt_program_map_PID = get_bits(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;
}
static int flushbuf(hb_stream_t *stream)
{
int old_write_index = stream->ps_current_write_buffer_index;
// Flip the buffers and start moving on to the next
stream->ps_current_write_buffer_index++;
if (stream->ps_current_write_buffer_index > kNumDecodeBuffers-1)
stream->ps_current_write_buffer_index = 0;
if ( (stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len != 0) || (stream->ps_decode_buffer[stream->ps_current_write_buffer_index].write_pos != 0) )
{
hb_log("flushbuf - new buffer (index %d) has non zero length and write position !", stream->ps_current_write_buffer_index);
return 0;
}
stream->ps_current_read_buffer_index = old_write_index;
stream->ps_decode_buffer[stream->ps_current_read_buffer_index].read_pos = 0;
return 1;
}
static int fwrite64(void* buf, int elsize, int elnum, hb_stream_t* stream)
{
int size = elsize;
if (elnum > 1)
size *= elnum;
int written = 0;
int current_write_index = stream->ps_current_write_buffer_index;
if (size <= stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos)
{
memcpy(stream->ps_decode_buffer[current_write_index].data + stream->ps_decode_buffer[current_write_index].write_pos, buf, size);
stream->ps_decode_buffer[current_write_index].write_pos += size;
stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
written = size;
}
else
{
memcpy(stream->ps_decode_buffer[current_write_index].data + stream->ps_decode_buffer[current_write_index].write_pos, buf, stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos);
written += stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos;
stream->ps_decode_buffer[current_write_index].write_pos += stream->ps_decode_buffer[current_write_index].size - stream->ps_decode_buffer[current_write_index].write_pos;
stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
if (flushbuf(stream))
{
// FLushing the buffer will have change the current write buffer
current_write_index = stream->ps_current_write_buffer_index;
memcpy(stream->ps_decode_buffer[current_write_index].data, (unsigned char*)buf + written, size - written);
stream->ps_decode_buffer[current_write_index].write_pos += size - written;
stream->ps_decode_buffer[current_write_index].len = stream->ps_decode_buffer[current_write_index].write_pos;
written += size - written;
}
}
if (elnum == 1 && written == size)
return 1;
else
return written / elsize;
}
static int write_pack(hb_stream_t* stream, int64_t time)
{
unsigned char buf[64];
set_buf(buf, 64, 1); // clear buffer
int64_t ext_time = time % 300;
time = time / 300;
set_bits(0x000001ba, 32); // pack id 32
set_bits(1, 2); // 0x01 2
set_bits((unsigned int)(time >> 30), 3); // system_clock_reference_base 3
set_bits(1, 1); // marker_bit 1
set_bits((unsigned int)(time >> 15), 15); // system_clock_reference_base 15
set_bits(1, 1); // marker_bit 1
set_bits((unsigned int)time, 15); // system_clock_reference_base1 15
set_bits(1, 1); // marker_bit 1
set_bits((unsigned int)ext_time, 9); // system_clock_reference_extension 9
set_bits(1, 1); // marker_bit 1
set_bits(DEMUX, 22); // program_mux_rate 22
set_bits(1, 1); // marker_bit 1
set_bits(1, 1); // marker_bit 1
set_bits(31, 5); // reserved 5
set_bits(0, 3); // pack_stuffing_length 3
return fwrite64(buf, buf_size(), 1, stream) == 1;
}
static int pad_buffer(hb_stream_t *stream, int pad)
{
pad -= 6;
char buf[6];
buf[0] = '\x0'; buf[1] = '\x0'; buf[2] = '\x1'; buf[3] = '\xbe';
buf[4] = pad >> 8; buf[5] = pad & 0xff;
if (fwrite64(buf, 6, 1, stream) != 1)
return 0;
unsigned char padbyte = 0xff;
int i=0;
for (i = 0; i < pad; i++)
{
if (fwrite64(&padbyte, 1, 1, stream) != 1)
return 0;
}
return 1;
}
int make_pes_header(unsigned char* buf, int streamid, int len, int64_t PTS, int64_t DTS)
{
int hdrlen = 0;
int PTS_DTS_flags = 0;
if (PTS != -1)
{
if (DTS != -1)
{
PTS_DTS_flags = 3;
hdrlen += 10;
}
else
{
PTS_DTS_flags = 2;
hdrlen += 5;
}
}
set_buf(buf, 9 + hdrlen, 1); // clear the buffer
set_bits(0x000001, 24); // packet_start_code_prefix 24
set_bits((unsigned int)streamid, 8); // directory_stream_id 8
set_bits(len, 16); // PES_packet_length 16
set_bits(0x2, 2); // '10' 2
set_bits(0, 2); // PES_scrambling_control 2
set_bits(1, 1); // PES_priority 1
set_bits(0, 1); // data_alignment_indicator 1
set_bits(0, 1); // copyright 1
set_bits(0, 1); // original_or_copy 1
set_bits(PTS_DTS_flags, 2); // PTS_DTS_flags 2
set_bits(0, 1); // ESCR_flag 1
set_bits(0, 1); // ES_rate_flag 1
set_bits(0, 1); // DSM_trick_mode_flag 1
set_bits(0, 1); // additional_copy_info_flag 1
set_bits(0, 1); // PES_CRC_flag 1
set_bits(0, 1); // PES_extension_flag 1
set_bits(hdrlen, 8); // PES_header_data_length 8
if (PTS_DTS_flags == 2)
{
set_bits(2, 4); // '0010' 4
set_bits((unsigned int)(PTS >> 30), 3); // PTS [32..30] 3
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)(PTS >> 15), 15); // PTS [29..15] 15
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)PTS, 15); // PTS [14..0] 15
set_bits(1, 1); // marker bit 1
}
else if (PTS_DTS_flags == 3)
{
set_bits(3, 4); // '0011' 4
set_bits((unsigned int)(PTS >> 30), 3); // PTS [32..30] 3
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)(PTS >> 15), 15); // PTS [29..15] 15
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)PTS, 15); // PTS [14..0] 15
set_bits(1, 1); // marker bit 1
set_bits(1, 4); // '0001' 4
set_bits((unsigned int)(DTS >> 30), 3); // DTS [32..30] 3
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)(DTS >> 15), 15); // DTS [29..15] 15
set_bits(1, 1); // marker bit 1
set_bits((unsigned int)DTS, 15); // DTS [14..0] 15
set_bits(1, 1); // marker bit 1
}
return buf_size();
}
int generate_output_data(hb_stream_t *stream, int write_ac3, int curstream, int pid)
{
unsigned char ac3_substream_id[4];
int ac3len = 0;
if (write_ac3)
{
// Make a four byte ac3 streamid
ac3_substream_id[0] = 0x80; // Four byte AC3 CODE??
ac3_substream_id[1] = 0x01;
ac3_substream_id[2] = 0x00; // WHY??? OH WHY??
ac3_substream_id[3] = 0x02;
ac3len = 4;
}
int written = 0; // Bytes we've written to output file
int pos = 0; // Position in PES packet buffer
for (;;)
{
if ((stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len % HB_DVD_READ_BUFFER_SIZE) != 0)
{
hb_log("write_output_stream - Packet's not falling on read buffer size boundries!");
return 1;
}
// Get total length of this pack
int len = min(14 + ac3len + stream->ts_packetpos[curstream] - pos, HB_DVD_READ_BUFFER_SIZE);
// Figure out stuffing (if we have less than 16 bytes left)
int stuffing = 0;
if (len < HB_DVD_READ_BUFFER_SIZE && HB_DVD_READ_BUFFER_SIZE - len < 16)
{
stuffing = HB_DVD_READ_BUFFER_SIZE - len;
len += stuffing;
}
// Write out pack header
off_t file_offset = ftello(stream->file_handle);
int64_t packet_time = (file_offset * CLOCKRATE / STREAMRATE) + 0 /*file_time*/;
if (!write_pack(stream, packet_time))
{
hb_log("write_output_stream - Couldn't write pack header!");
return 1;
}
int index_of_selected_pid = -1;
if ((index_of_selected_pid = index_of_video_pid(pid,stream)) < 0)
{
if ((index_of_selected_pid = index_of_audio_pid(pid,stream)) < 0)
{
hb_log("generate_output_data - cannot find pid 0x%x (%d) in selected audio or video pids", pid, pid);
return 0;
}
else
{
stream->ts_packetbuf[curstream][pos + 3] = stream->ts_streamid[stream->ts_number_video_pids + index_of_selected_pid];
}
}
else
stream->ts_packetbuf[curstream][pos + 3] = stream->ts_streamid[index_of_selected_pid];
// Packet length..
// Subtract pack size (14) and pes id and len (6) from lenth
stream->ts_packetbuf[curstream][pos + 4] = (len - 6 - 14) >> 8; stream->ts_packetbuf[curstream][pos + 5] = (len - 6 - 14) & 0xFF;
// Add any stuffing bytes to header extra len
int hdrsize = 9 + stream->ts_packetbuf[curstream][pos + 8];
stream->ts_packetbuf[curstream][pos + 8] += stuffing; // Add stuffing to header bytes
// Write out id, streamid, len
if (fwrite64(stream->ts_packetbuf[curstream] + pos, hdrsize, 1, stream) != 1) // Write pes id, streamid, and len
{
hb_log("write_output_stream - Failed to write output file!");
return 1;
}
// Write stuffing
int i=0;
for (i = 0; i < stuffing; i++) // Write any stuffing bytes
{
unsigned char stuff = 0xff;
if (fwrite64(&stuff, 1, 1, stream) != 1)
{
hb_log("write_output_stream - Failed to write output file!");
return 1;
}
}
// Write ac3 streamid
if (ac3len != 0)
{
if (fwrite64(ac3_substream_id, ac3len, 1, stream) != 1)
{
hb_log("write_output_stream - Failed to write output file!");
return 1;
}
}
// Write rest of data len minus headersize (9) stuffing, and pack size (14)
if (fwrite64(stream->ts_packetbuf[curstream] + pos + hdrsize, len - hdrsize - 14 - stuffing - ac3len, 1, stream) != 1) // Write data bytes
{
hb_log("write_output_stream - Failed to write output file!");
return 1;
}
written += len;
// Add len minus stuff we added like the pack (14) and the stuffing.
pos += len - 14 - stuffing - ac3len;
if (pos == stream->ts_packetpos[curstream])
break;
// Add pes header for next packet
pos -= 9;
// make_pes_header(stream->ts_packetbuf[curstream] + pos, (pid == stream->ts_video_pids[0] ? stream->ts_streamid[kVideoStream] : stream->ts_streamid[kAudioStream]), 0, -1, -1);
make_pes_header(stream->ts_packetbuf[curstream] + pos, stream->ts_streamid[curstream], 0, -1, -1);
}
// Write padding
if ((written % HB_DVD_READ_BUFFER_SIZE) != 0)
{
int left = HB_DVD_READ_BUFFER_SIZE - (written % HB_DVD_READ_BUFFER_SIZE);
// Pad out to HB_DVD_READ_BUFFER_SIZE bytes
if (!pad_buffer(stream, left))
{
hb_log("write_output_stream - Couldn't write pad buffer!");
return 1;
}
}
stream->ts_packetpos[curstream] = 0;
stream->ts_streamcont[curstream] = -1;
return 0;
}
static void hb_ts_handle_mpeg_audio(hb_stream_t *stream, int curstream, unsigned char* buf, int adapt_len )
{
// Although we don't have AC3/A52 audio here we can still use the same structure to record this useful information.
stream->a52_info[curstream - stream->ts_number_video_pids].flags = A52_STEREO;
stream->a52_info[curstream - stream->ts_number_video_pids].rate = 48000 /*Hz*/;
stream->a52_info[curstream - stream->ts_number_video_pids].bitrate = 384000 /*Bps*/;
}
static int hb_ts_handle_ac3_audio(hb_stream_t *stream, int curstream, unsigned char* buf, int adapt_len )
{
int spos, dpos;
// Make sure we start with 0x0b77
if (stream->ts_packetbuf[curstream][9 + stream->ts_packetbuf[curstream][8]] != 0x0b || stream->ts_packetbuf[curstream][9 + stream->ts_packetbuf[curstream][8] + 1] != 0x77)
{
spos = 9 + stream->ts_packetbuf[curstream][8];
dpos = 9 + stream->ts_packetbuf[curstream][8];
while (spos <= stream->ts_packetpos[curstream] - 2 && !(stream->ts_packetbuf[curstream][spos] == 0x0b && stream->ts_packetbuf[curstream][spos + 1] == 0x77))
spos++;
if (!(stream->ts_packetbuf[curstream][spos] == 0x0b && stream->ts_packetbuf[curstream][spos + 1] == 0x77))
{
hb_log("hb_ts_stream_decode - Couldn't sync AC3 packet!");
stream->ts_skipbad[curstream] = 1;
return 0;
}
while (spos < stream->ts_packetpos[curstream])
{
stream->ts_packetbuf[curstream][dpos] = stream->ts_packetbuf[curstream][spos];
spos++;
dpos++;
}
stream->ts_packetpos[curstream] = dpos;
}
// Check the next packet to make sure IT starts with a 0x0b77
int plen = 0;
// if (buf[4 + adapt_len] == 0 && buf[4 + adapt_len + 1] == 0 && // Starting with an mpeg header?
// buf[4 + adapt_len + 2] == 1 && buf[4 + adapt_len + 3] == 0xBD)
plen = 9 + buf[4 + adapt_len + 8];
int pstart = 4 + adapt_len + plen;
if (buf[pstart] != 0x0b || buf[pstart + 1] != 0x77)
{
spos = pstart;
while (spos < 188 - 2 && !(buf[spos] == 0x0b && buf[spos + 1] == 0x77))
{
stream->ts_packetbuf[curstream][stream->ts_packetpos[curstream]] = buf[spos];
stream->ts_packetpos[curstream]++;
spos++;
}
if (!(buf[spos] == 0x0b && buf[spos + 1] == 0x77))
{
hb_log("hb_ts_stream_decode - Couldn't sync AC3 packet!");
stream->ts_skipbad[curstream] = 1;
return 0;
}
adapt_len = spos - 4 - plen;
dpos = spos - 1;
spos = pstart - 1;
while (spos >= pstart - plen)
{
buf[dpos] = buf[spos];
spos--;
dpos--;
}
}
int flags, rate, bitrate;
if( a52_syncinfo( &buf[pstart], &flags, &rate, &bitrate ) )
{
stream->a52_info[curstream - stream->ts_number_video_pids].flags = flags;
stream->a52_info[curstream - stream->ts_number_video_pids].rate = rate;
stream->a52_info[curstream - stream->ts_number_video_pids].bitrate = bitrate;
}
return 1;
}
static void hb_ts_stream_find_pids(hb_stream_t *stream)
{
unsigned char buf[188];
int curstream = 0;
// Stream ID info
unsigned int program_num = 0;
unsigned int network_PID = 0;
unsigned int program_map_PID = 0;
// align to first packet
align_to_next_packet(stream->file_handle);
// 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
int bytesReadInPacket = 0;
for (;;)
{
// Try to read packet..
int bytesRead;
if ((bytesRead = fread(buf+bytesReadInPacket, 1, 188-bytesReadInPacket, stream->file_handle)) != 188-bytesReadInPacket)
{
if (bytesRead < 0)
bytesRead = 0;
bytesReadInPacket += bytesRead;
hb_log("hb_ts_stream_find_pids - end of file");
break;
}
else
{
bytesReadInPacket = 0;
}
// Check sync byte
if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
{
// __int64 pos = ftell64(fin);
hb_log("hb_ts_stream_find_pids - Bad transport packet (no sync byte 0x47)!");
int i = 0;
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
stream->ts_skipbad[i] = 1;
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
continue;
}
// Get pid
int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
if ((pid == 0x0000) && (program_num == 0))
{
decode_PAT(buf, stream);
continue;
}
if (pid == 0x1ffb)
{
printf("Need to decode PSIP data !\n");
continue;
}
if ((network_PID > 0) && (pid == network_PID))
{
printf("Need to Decode network PID section !\n");
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 (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 ((stream->ts_number_video_pids > 0) && (stream->ts_number_audio_pids > 0))
break;
}
hb_log("hb_ts_stream_find_pids - found the following PIDS");
hb_log(" Video PIDS : ");
int i=0;
for (i=0; i < stream->ts_number_video_pids; i++)
{
hb_log(" 0x%x (%d)", stream->ts_video_pids[i], stream->ts_video_pids[i]);
}
hb_log(" Audio PIDS : ");
for (i = 0; i < stream->ts_number_audio_pids; i++)
{
hb_log(" 0x%x (%d)", stream->ts_audio_pids[i], stream->ts_audio_pids[i]);
}
}
int index_of_video_pid(int pid, hb_stream_t *stream)
{
int found_pid = -1, i = 0;
for (i = 0; (i < stream->ts_number_video_pids) && (found_pid < 0); i++)
{
if (pid == stream->ts_video_pids[i])
found_pid = i;
}
return found_pid;
}
int index_of_audio_pid(int pid, hb_stream_t *stream)
{
int i = 0, found_pid = -1;
// If a selected audio pid index has been set it indicates
// which of the potential pids we need to output so only return
// that index for the appropriate pid. Other pids should just
// be ignored.
if (stream->ts_selected_audio_pid_index >= 0)
{
if (pid == stream->ts_audio_pids[stream->ts_selected_audio_pid_index])
return stream->ts_selected_audio_pid_index;
else
return -1;
}
// If no specific pid index is set then we're probably just gathering
// pid and/or stream information (during DecodePreviews for example)
// so return the appropriate index
for (i = 0; (i < stream->ts_number_audio_pids) && (found_pid < 0); i++)
{
if (pid == stream->ts_audio_pids[i])
found_pid = i;
}
return found_pid;
}
int index_of_pid(int pid, hb_stream_t *stream)
{
int found_pid = -1;
if ((found_pid = index_of_video_pid(pid, stream)) >= 0)
return found_pid;
if ((found_pid = index_of_audio_pid(pid, stream)) >= 0)
return found_pid;
return found_pid;
}
/***********************************************************************
* hb_ts_stream_decode
***********************************************************************
*
**********************************************************************/
static void hb_ts_stream_decode(hb_stream_t *stream)
{
unsigned char buf[188];
int curstream;
int doing_iframe;
int i = 0;
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 0;
stream->ts_skipbad[i] = 0;
}
doing_iframe = 0;
if ((stream->ts_number_video_pids == 0) || (stream->ts_number_audio_pids == 0))
{
hb_log("hb_ts_stream_decode - no Video or Audio PID selected, cannot decode transport stream");
return;
}
int bytesReadInPacket = 0;
int curr_write_buffer_index = stream->ps_current_write_buffer_index;
// Write output data until a buffer switch occurs.
while (curr_write_buffer_index == stream->ps_current_write_buffer_index)
{
// Try to read packet..
int bytesRead;
if ((bytesRead = fread(buf+bytesReadInPacket, 1, 188-bytesReadInPacket, stream->file_handle)) != 188-bytesReadInPacket)
{
if (bytesRead < 0)
bytesRead = 0;
bytesReadInPacket += bytesRead;
// Flush any outstanding output data - we're done here.
flushbuf(stream);
break;
}
else
{
// curfilepos += bytesRead;
bytesReadInPacket = 0;
}
// Check sync byte
if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
{
// __int64 pos = ftell64(fin);
hb_log("hb_ts_stream_decode - Bad transport packet (no sync byte 0x47)!");
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
stream->ts_skipbad[i] = 1;
}
continue;
}
// Get pid
int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
// Skip this block
if (index_of_pid(pid, stream) < 0)
continue;
// if (pid != stream->ts_audio_pids[0] && pid != stream->ts_video_pids[0])
// continue;
// Get the pos and buf - we organize our streams as 'n' video streams then 'm' audio streams
int index_of_selected_pid = -1;
if ((index_of_selected_pid = index_of_video_pid(pid,stream)) < 0)
{
// Not a video PID perhaps audio ?
if ((index_of_selected_pid = index_of_audio_pid(pid,stream)) < 0)
{
hb_log("hb_ts_stream_decode - Unknown pid 0x%x (%d)", pid, pid);
continue;
}
else
{
curstream = stream->ts_number_video_pids + index_of_selected_pid;
if (curstream > kMaxNumberDecodeStreams)
{
hb_log("hb_ts_stream_decode - Too many streams %d", curstream);
continue;
}
}
}
else
curstream = index_of_selected_pid;
// if (pid == stream->ts_video_pids[0])
// curstream = 0;
// else
// curstream = 1;
// Get start code
int start;
start = (buf[1] & 0x40) != 0;
if (!start && stream->ts_skipbad[curstream])
continue;
// Get error
int errorbit = (buf[1] & 0x80) != 0;
if (errorbit)
{
hb_log("hb_ts_stream_decode - Error bit set in packet");
stream->ts_skipbad[curstream] = 1;
continue;
}
// Get adaption header info
int adaption = (buf[3] & 0x30) >> 4;
int adapt_len = 0;
// Get continuity
int continuity = (buf[3] & 0xF);
if ((stream->ts_streamcont[curstream] != -1) && (adaption & 0x01 == 0x01)) // Continuity only increments for adaption values of 0x3 or 0x01
{
if (continuity != ((stream->ts_streamcont[curstream] + 1) & 0xF))
{
hb_log("hb_ts_stream_decode - Bad continuity code in packet");
stream->ts_skipbad[curstream] = 1;
continue;
}
stream->ts_streamcont[curstream] = continuity;
}
// Get adaption header size
if (adaption == 0)
{
hb_log("hb_ts_stream_decode - Bad adaption code (code was 0)!");
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
stream->ts_skipbad[i] = 1;
}
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
continue;
}
else if (adaption == 0x2)
adapt_len = 184;
else if (adaption == 0x3)
{
adapt_len = buf[4] + 1;
if (adapt_len > 184)
{
hb_log("hb_ts_stream_decode - Invalid adapt len (was > 183)!");
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
stream->ts_skipbad[i] = 1;
}
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
}
}
// HBO is slick, it doesn't bother to sync AC3 packets with PES elementary stream packets.. so
// we have to swizzle them together! (ARGHH!)
// if (pid == stream->ts_audio_pids[0] && start)
if ((index_of_audio_pid(pid, stream) >= 0) && start)
{
// Is there an AC3 packet start 0b77 code in this packet??
int sync_found = 0;
unsigned char *p = buf + 4 + adapt_len;
while (p <= buf + 186)
{
if (p[0] == 0x0b && p[1] == 0x77)
{
sync_found = 1;
break;
}
p++;
}
// Couldn't find an AC3 sync start in this packet.. don't make a PES packet!
if (!sync_found)
{
// int pos = ftell(fin);
// error("AC3 packet sync not found in start frame");
// return 1;
adapt_len += 9 + buf[4 + adapt_len + 8];
start = 0;
}
}
// Get PCR
if (start && (adaption & 0x2) && (buf[5] & 0x10))
{
int64_t PCR_base = ((int64_t)buf[6] << 25) | ((int64_t)buf[7] << 17) |
((int64_t)buf[8] << 9) | ((int64_t)buf[9] << 1) | ((int64_t)buf[10] >> 7);
int64_t PCR_ext = ((int64_t)(buf[10] & 0x1) << 8) | ((int64_t)buf[11]);
int64_t PCR = PCR_base * 300 + PCR_ext;
}
// Get random
// bool random = false;
// if (start && (adaption & 0x2))
// random = (buf[5] & 0x40) != 0; // BUG: SOME TS STREAMS DON'T HAVE THE RANDOM BIT (ABC!! ALIAS)
// Found a random access point (now we can start a frame/audio packet..)
if (start)
{
// Check to see if this is an i_frame (group of picture start)
if (pid == stream->ts_video_pids[0])
{
// printf("Found Video Start for pid 0x%x\n", pid);
// Look for the Group of Pictures packet.. indicates this is an I-Frame packet..
doing_iframe = 0;
unsigned int strid = 0;
int i = 4;
for (i = 4 + adapt_len; i < 188; i++)
{
strid = (strid << 8) | buf[i];
if (strid == 0x000001B8) // group_start_code
{
// found a Group of Pictures header, subsequent picture must be an I-frame
doing_iframe = 1;
}
else if (strid == 0x000001B3) // sequence_header code
{
doing_iframe = 1;
}
else if (strid == 0x00000100) // picture_start_code
{
// picture_header, let's see if it's an I-frame
if (i<187)
{
// int pic_start_code = (buf[i+2] >> 3) & 0x07;
// hb_log("hb_ts_stream_decode - picture_start_code header value = 0x%x (%d)", pic_start_code, pic_start_code);
// check if picture_coding_type == 1
if ((buf[i+2] & (0x7 << 3)) == (1 << 3))
{
// found an I-frame picture
doing_iframe = 1;
}
}
}
if (doing_iframe)
{
if (!stream->ts_foundfirst[curstream])
{
stream->ts_foundfirst[curstream] = 1;
// first_video_PCR = PCR;
}
break;
}
}
}
else if (index_of_audio_pid(pid, stream) >= 0)
{
if (stream->ts_foundfirst[0]) // Set audio found first ONLY after first video frame found. There's an assumption here that stream '0' is a video stream
{
stream->ts_foundfirst[curstream] |= 1;
}
}
// If we were skipping a bad packet, start fresh on this new PES packet..
if (stream->ts_skipbad[curstream] == 1)
{
stream->ts_skipbad[curstream] = 0;
stream->ts_packetpos[curstream] = 0;
}
// Get the continuity code of this packet
stream->ts_streamcont[curstream] = continuity;
}
// Write a 2048 byte program stream packet..
if (start && stream->ts_packetpos[curstream] > 0 && stream->ts_foundfirst[curstream] && !stream->ts_skipbad[curstream])
{
// Save the substream id block so we can added it to subsequent blocks
int write_ac3 = 0;
// if (pid == stream->ts_audio_pids[0] /*&& audstreamid == 0xBD*/)
if (index_of_audio_pid(pid, stream) >= 0)
{
// Curstream is a zero based index of streams and includes both video and audio streams, so we must subtract the numver of video streams
// from the indes value used here since ts_audio_stream_type is indexed only by audio streams.
if ((stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x04) || (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x81))
{
write_ac3 = hb_ts_handle_ac3_audio(stream, curstream, buf, adapt_len);
}
else if (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x03)
{
hb_ts_handle_mpeg_audio(stream, curstream, buf, adapt_len);
}
else
{
hb_log("hb_ts_stream_decode - Unknown Audio Stream type ! 0x%x (%d)", stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids], stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids]);
}
}
if (generate_output_data(stream, write_ac3, curstream, pid) != 0)
return ;
}
// Add the payload for this packet to the current buffer
if (stream->ts_foundfirst[curstream] && (184 - adapt_len) > 0)
{
memcpy(stream->ts_packetbuf[curstream] + stream->ts_packetpos[curstream], buf + 4 + adapt_len, 184 - adapt_len);
stream->ts_packetpos[curstream] += 184 - adapt_len;
}
}
}
/***********************************************************************
* hb_ts_stream_reset
***********************************************************************
*
**********************************************************************/
static void hb_ts_stream_reset(hb_stream_t *stream)
{
int i=0;
for (i=0; i < kNumDecodeBuffers; i++)
{
stream->ps_decode_buffer[i].read_pos = 0;
stream->ps_decode_buffer[i].write_pos = 0;
stream->ps_decode_buffer[i].len = 0;
}
for (i=0; i < kMaxNumberDecodeStreams; i++)
{
stream->ts_streamcont[i] = -1;
}
stream->ps_current_write_buffer_index = 0;
stream->ps_current_read_buffer_index = 1;
align_to_next_packet(stream->file_handle);
}