/* decavcodec.c
Copyright (c) 2003-2013 HandBrake Team
This file is part of the HandBrake source code
Homepage: .
It may be used under the terms of the GNU General Public License v2.
For full terms see the file COPYING file or visit http://www.gnu.org/licenses/gpl-2.0.html
*/
/* This module is Handbrake's interface to the ffmpeg decoder library
(libavcodec & small parts of libavformat). It contains four Handbrake
"work objects":
decavcodeca connects HB to an ffmpeg audio decoder
decavcodecv connects HB to an ffmpeg video decoder
(Two different routines are needed because the ffmpeg library
has different decoder calling conventions for audio & video.
These work objects are self-contained & follow all
of HB's conventions for a decoder module. They can be used like
any other HB decoder (deca52, decmpeg2, etc.).
These decoders handle 2 kinds of input. Streams that are demuxed
by HandBrake and streams that are demuxed by libavformat. In the
case of streams that are demuxed by HandBrake, there is an extra
parse step required that happens in decodeVideo and decavcodecaWork.
In the case of streams that are demuxed by libavformat, there is context
information that we need from the libavformat. This information is
propagated from hb_stream_open to these decoders through title->opaque_priv.
A consequence of the above is that the streams that are demuxed by HandBrake
*can't* use information from the AVStream because there isn't one - they
get their data from either the dvd reader or the mpeg reader, not the ffmpeg
stream reader. That means that they have to make up for deficiencies in the
AVCodecContext info by using stuff kept in the HB "title" struct. It
also means that ffmpeg codecs that randomly scatter state needed by
the decoder across both the AVCodecContext & the AVStream (e.g., the
VC1 decoder) can't easily be used by the HB mpeg stream reader.
*/
#include "hb.h"
#include "hbffmpeg.h"
#include "audio_resample.h"
#ifdef USE_HWD
#include "opencl.h"
#include "vadxva2.h"
#endif
#ifdef USE_QSV
#include "enc_qsv.h"
#include "qsv_common.h"
#endif
static void compute_frame_duration( hb_work_private_t *pv );
static void flushDelayQueue( hb_work_private_t *pv );
static int decavcodecaInit( hb_work_object_t *, hb_job_t * );
static int decavcodecaWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
static void decavcodecClose( hb_work_object_t * );
static int decavcodecaInfo( hb_work_object_t *, hb_work_info_t * );
static int decavcodecaBSInfo( hb_work_object_t *, const hb_buffer_t *, hb_work_info_t * );
hb_work_object_t hb_decavcodeca =
{
.id = WORK_DECAVCODEC,
.name = "Audio decoder (libavcodec)",
.init = decavcodecaInit,
.work = decavcodecaWork,
.close = decavcodecClose,
.info = decavcodecaInfo,
.bsinfo = decavcodecaBSInfo
};
#define HEAP_SIZE 8
typedef struct {
// there are nheap items on the heap indexed 1..nheap (i.e., top of
// heap is 1). The 0th slot is unused - a marker is put there to check
// for overwrite errs.
int64_t h[HEAP_SIZE+1];
int nheap;
} pts_heap_t;
struct hb_work_private_s
{
hb_job_t *job;
hb_title_t *title;
AVCodecContext *context;
AVCodecParserContext *parser;
AVFrame *frame;
int threads;
int video_codec_opened;
hb_list_t *list;
double duration; // frame duration (for video)
double field_duration; // field duration (for video)
int frame_duration_set; // Indicates valid timing was found in stream
double pts_next; // next pts we expect to generate
int64_t chap_time; // time of next chap mark (if new_chap != 0)
int new_chap; // output chapter mark pending
uint32_t nframes;
uint32_t ndrops;
uint32_t decode_errors;
int brokenByMicrosoft; // video stream may contain packed b-frames
hb_buffer_t* delayq[HEAP_SIZE];
int queue_primed;
pts_heap_t pts_heap;
void* buffer;
struct SwsContext *sws_context; // if we have to rescale or convert color space
int sws_width;
int sws_height;
int sws_pix_fmt;
int cadence[12];
int wait_for_keyframe;
#ifdef USE_HWD
hb_va_dxva2_t *dxva2;
uint8_t *dst_frame;
hb_oclscale_t *opencl_scale;
#endif
hb_audio_resample_t *resample;
#ifdef USE_QSV
// QSV-specific settings
struct
{
int decode;
av_qsv_config config;
const char *codec_name;
#define USE_QSV_PTS_WORKAROUND // work around out-of-order output timestamps
#ifdef USE_QSV_PTS_WORKAROUND
hb_list_t *pts_list;
#endif
} qsv;
#endif
hb_list_t * list_subtitle;
};
#ifdef USE_QSV_PTS_WORKAROUND
// save/restore PTS if the decoder may not attach the right PTS to the frame
static void hb_av_add_new_pts(hb_list_t *list, int64_t new_pts)
{
int index = 0;
int64_t *cur_item, *new_item;
if (list != NULL && new_pts != AV_NOPTS_VALUE)
{
new_item = malloc(sizeof(int64_t));
if (new_item != NULL)
{
*new_item = new_pts;
// sort chronologically
for (index = 0; index < hb_list_count(list); index++)
{
cur_item = hb_list_item(list, index);
if (cur_item != NULL)
{
if (*cur_item == *new_item)
{
// no duplicates
free(new_item);
return;
}
if (*cur_item > *new_item)
{
// insert here
break;
}
}
}
hb_list_insert(list, index, new_item);
}
}
}
static int64_t hb_av_pop_next_pts(hb_list_t *list)
{
int64_t *item, next_pts = AV_NOPTS_VALUE;
if (list != NULL && hb_list_count(list) > 0)
{
item = hb_list_item(list, 0);
if (item != NULL)
{
next_pts = *item;
hb_list_rem(list, item);
free(item);
}
}
return next_pts;
}
#endif
static void decodeAudio( hb_audio_t * audio, hb_work_private_t *pv, uint8_t *data, int size, int64_t pts );
static hb_buffer_t *link_buf_list( hb_work_private_t *pv );
static int64_t heap_pop( pts_heap_t *heap )
{
int64_t result;
if ( heap->nheap <= 0 )
{
return -1;
}
// return the top of the heap then put the bottom element on top,
// decrease the heap size by one & rebalence the heap.
result = heap->h[1];
int64_t v = heap->h[heap->nheap--];
int parent = 1;
int child = parent << 1;
while ( child <= heap->nheap )
{
// find the smallest of the two children of parent
if (child < heap->nheap && heap->h[child] > heap->h[child+1] )
++child;
if (v <= heap->h[child])
// new item is smaller than either child so it's the new parent.
break;
// smallest child is smaller than new item so move it up then
// check its children.
int64_t hp = heap->h[child];
heap->h[parent] = hp;
parent = child;
child = parent << 1;
}
heap->h[parent] = v;
return result;
}
static void heap_push( pts_heap_t *heap, int64_t v )
{
if ( heap->nheap < HEAP_SIZE )
{
++heap->nheap;
}
// stick the new value on the bottom of the heap then bubble it
// up to its correct spot.
int child = heap->nheap;
while (child > 1) {
int parent = child >> 1;
if (heap->h[parent] <= v)
break;
// move parent down
int64_t hp = heap->h[parent];
heap->h[child] = hp;
child = parent;
}
heap->h[child] = v;
}
/***********************************************************************
* hb_work_decavcodec_init
***********************************************************************
*
**********************************************************************/
static int decavcodecaInit( hb_work_object_t * w, hb_job_t * job )
{
AVCodec * codec;
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->job = job;
if (job)
pv->title = job->title;
else
pv->title = w->title;
pv->list = hb_list_init();
codec = avcodec_find_decoder(w->codec_param);
pv->context = avcodec_alloc_context3(codec);
if (pv->title->opaque_priv != NULL)
{
AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv;
avcodec_copy_context(pv->context, ic->streams[w->audio->id]->codec);
// libav's eac3 parser toggles the codec_id in the context as
// it reads eac3 data between AV_CODEC_ID_AC3 and AV_CODEC_ID_EAC3.
// It detects an AC3 sync pattern sometimes in ac3_sync() which
// causes it to eventually set avctx->codec_id to AV_CODEC_ID_AC3
// in ff_aac_ac3_parse(). Since we are parsing some data before
// we get here, the codec_id may have flipped. This will cause an
// error in hb_avcodec_open(). So flip it back!
pv->context->codec_id = w->codec_param;
}
else
{
pv->parser = av_parser_init(w->codec_param);
}
hb_ff_set_sample_fmt(pv->context, codec, AV_SAMPLE_FMT_FLT);
/* Downmixing & sample_fmt conversion */
if (!(w->audio->config.out.codec & HB_ACODEC_PASS_FLAG))
{
pv->resample =
hb_audio_resample_init(AV_SAMPLE_FMT_FLT,
w->audio->config.out.mixdown,
w->audio->config.out.normalize_mix_level);
if (pv->resample == NULL)
{
hb_error("decavcodecaInit: hb_audio_resample_init() failed");
return 1;
}
/*
* Some audio decoders can downmix using embedded coefficients,
* or dedicated audio substreams for a specific channel layout.
*
* But some will e.g. use normalized mix coefficients unconditionally,
* so we need to make sure this matches what the user actually requested.
*/
int avcodec_downmix = 0;
switch (w->codec_param)
{
case AV_CODEC_ID_AC3:
case AV_CODEC_ID_EAC3:
avcodec_downmix = w->audio->config.out.normalize_mix_level != 0;
break;
case AV_CODEC_ID_DTS:
avcodec_downmix = w->audio->config.out.normalize_mix_level == 0;
break;
case AV_CODEC_ID_TRUEHD:
avcodec_downmix = (w->audio->config.out.normalize_mix_level == 0 ||
w->audio->config.out.mixdown == HB_AMIXDOWN_MONO ||
w->audio->config.out.mixdown == HB_AMIXDOWN_DOLBY ||
w->audio->config.out.mixdown == HB_AMIXDOWN_DOLBYPLII);
break;
default:
break;
}
if (avcodec_downmix)
{
switch (w->audio->config.out.mixdown)
{
case HB_AMIXDOWN_MONO:
if (w->codec_param == AV_CODEC_ID_TRUEHD)
{
// libavcodec can't decode TrueHD Mono (bug #356)
// work around it by requesting Stereo and downmixing
pv->context->request_channel_layout = AV_CH_LAYOUT_STEREO;
break;
}
pv->context->request_channel_layout = AV_CH_LAYOUT_MONO;
break;
// request 5.1 before downmixing to dpl1/dpl2
case HB_AMIXDOWN_DOLBY:
case HB_AMIXDOWN_DOLBYPLII:
pv->context->request_channel_layout = AV_CH_LAYOUT_5POINT1;
break;
// request the layout corresponding to the selected mixdown
default:
pv->context->request_channel_layout =
hb_ff_mixdown_xlat(w->audio->config.out.mixdown, NULL);
break;
}
}
}
// Set decoder opts...
AVDictionary * av_opts = NULL;
av_dict_set( &av_opts, "refcounted_frames", "1", 0 );
if (hb_avcodec_open(pv->context, codec, &av_opts, 0))
{
av_dict_free( &av_opts );
hb_log("decavcodecaInit: avcodec_open failed");
return 1;
}
av_dict_free( &av_opts );
pv->frame = av_frame_alloc();
if (pv->frame == NULL)
{
hb_log("decavcodecaInit: av_frame_alloc failed");
return 1;
}
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
static void closePrivData( hb_work_private_t ** ppv )
{
hb_work_private_t * pv = *ppv;
if ( pv )
{
flushDelayQueue( pv );
hb_buffer_t *buf = link_buf_list( pv );
hb_buffer_close( &buf );
if ( pv->job && pv->context && pv->context->codec )
{
hb_log( "%s-decoder done: %u frames, %u decoder errors, %u drops",
pv->context->codec->name, pv->nframes, pv->decode_errors,
pv->ndrops );
}
av_frame_free(&pv->frame);
if ( pv->sws_context )
{
sws_freeContext( pv->sws_context );
}
if ( pv->parser )
{
av_parser_close(pv->parser);
}
if ( pv->context && pv->context->codec )
{
#ifdef USE_QSV
/*
* FIXME: knowingly leaked.
*
* If we're using our Libav QSV wrapper, qsv_decode_end() will call
* MFXClose() on the QSV session. Even if decoding is complete, we
* still need that session for QSV filtering and/or encoding, so we
* we can't close the context here until we implement a proper fix.
*/
if (!pv->qsv.decode)
#endif
{
hb_avcodec_close(pv->context);
}
}
if ( pv->context )
{
av_freep( &pv->context->extradata );
av_free( pv->context );
}
if ( pv->list )
{
hb_list_empty( &pv->list );
}
hb_audio_resample_free(pv->resample);
#ifdef USE_HWD
if (pv->opencl_scale != NULL)
{
free(pv->opencl_scale);
}
if (pv->dxva2 != NULL)
{
if (hb_ocl != NULL)
{
HB_OCL_BUF_FREE(hb_ocl, pv->dxva2->cl_mem_nv12);
}
hb_va_close(pv->dxva2);
}
#endif
#ifdef USE_QSV_PTS_WORKAROUND
if (pv->qsv.decode && pv->qsv.pts_list != NULL)
{
while (hb_list_count(pv->qsv.pts_list) > 0)
{
int64_t *item = hb_list_item(pv->qsv.pts_list, 0);
hb_list_rem(pv->qsv.pts_list, item);
free(item);
}
hb_list_close(&pv->qsv.pts_list);
}
#endif
free( pv );
}
*ppv = NULL;
}
static void decavcodecClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
#ifdef USE_HWD
if( pv->dst_frame ) free( pv->dst_frame );
#endif
if ( pv )
{
closePrivData( &pv );
w->private_data = NULL;
}
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
static int decavcodecaWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * in = *buf_in;
if ( in->size <= 0 )
{
/* EOF on input stream - send it downstream & say that we're done */
*buf_out = in;
*buf_in = NULL;
return HB_WORK_DONE;
}
*buf_out = NULL;
if ( in->s.start < -1 && pv->pts_next <= 0 )
{
// discard buffers that start before video time 0
return HB_WORK_OK;
}
int pos, len;
for ( pos = 0; pos < in->size; pos += len )
{
uint8_t *pout;
int pout_len;
int64_t cur;
cur = in->s.start;
if ( pv->parser != NULL )
{
len = av_parser_parse2( pv->parser, pv->context, &pout, &pout_len,
in->data + pos, in->size - pos, cur, cur, 0 );
cur = pv->parser->pts;
if ( cur == AV_NOPTS_VALUE )
cur = -1;
}
else
{
pout = in->data;
len = pout_len = in->size;
}
if (pout)
{
decodeAudio( w->audio, pv, pout, pout_len, cur );
}
}
*buf_out = link_buf_list( pv );
return HB_WORK_OK;
}
static int decavcodecaInfo( hb_work_object_t *w, hb_work_info_t *info )
{
hb_work_private_t *pv = w->private_data;
memset( info, 0, sizeof(*info) );
if ( pv && pv->context )
{
AVCodecContext *context = pv->context;
info->bitrate = context->bit_rate;
info->rate = context->time_base.num;
info->rate_base = context->time_base.den;
info->profile = context->profile;
info->level = context->level;
return 1;
}
return 0;
}
static int decavcodecaBSInfo( hb_work_object_t *w, const hb_buffer_t *buf,
hb_work_info_t *info )
{
hb_work_private_t *pv = w->private_data;
int ret = 0;
memset( info, 0, sizeof(*info) );
if ( pv && pv->context )
{
return decavcodecaInfo( w, info );
}
AVCodec *codec = avcodec_find_decoder( w->codec_param );
if ( ! codec )
{
// there's no ffmpeg codec for this audio type - give up
return -1;
}
static char codec_name[64];
info->name = strncpy( codec_name, codec->name, sizeof(codec_name)-1 );
AVCodecContext *context = avcodec_alloc_context3(codec);
AVCodecParserContext *parser = NULL;
if (w->title && w->title->opaque_priv != NULL)
{
AVFormatContext *ic = (AVFormatContext*)w->title->opaque_priv;
avcodec_copy_context(context, ic->streams[w->audio->id]->codec);
// libav's eac3 parser toggles the codec_id in the context as
// it reads eac3 data between AV_CODEC_ID_AC3 and AV_CODEC_ID_EAC3.
// It detects an AC3 sync pattern sometimes in ac3_sync() which
// causes it to eventually set avctx->codec_id to AV_CODEC_ID_AC3
// in ff_aac_ac3_parse(). Since we are parsing some data before
// we get here, the codec_id may have flipped. This will cause an
// error in hb_avcodec_open(). So flip it back!
context->codec_id = w->codec_param;
}
else
{
parser = av_parser_init(codec->id);
}
hb_ff_set_sample_fmt( context, codec, AV_SAMPLE_FMT_FLT );
if ( hb_avcodec_open( context, codec, NULL, 0 ) )
{
return -1;
}
unsigned char *pbuffer;
int pos, pbuffer_size;
while (buf != NULL && !ret)
{
pos = 0;
while (pos < buf->size)
{
int len, truehd_mono = 0;
if (parser != NULL)
{
len = av_parser_parse2(parser, context, &pbuffer, &pbuffer_size,
buf->data + pos, buf->size - pos,
buf->s.start, buf->s.start, 0);
}
else
{
pbuffer = buf->data;
len = pbuffer_size = buf->size;
}
pos += len;
// libavcodec can't decode TrueHD Mono (bug #356)
// work around it by requesting Stereo before decoding
if (context->codec_id == AV_CODEC_ID_TRUEHD &&
context->channel_layout == AV_CH_LAYOUT_MONO)
{
truehd_mono = 1;
context->request_channel_layout = AV_CH_LAYOUT_STEREO;
}
else
{
context->request_channel_layout = 0;
}
if (pbuffer_size > 0)
{
int got_frame;
AVFrame *frame = av_frame_alloc();
AVPacket avp;
av_init_packet(&avp);
avp.data = pbuffer;
avp.size = pbuffer_size;
len = avcodec_decode_audio4(context, frame, &got_frame, &avp);
if (len > 0 && context->sample_rate > 0)
{
info->rate_base = 1;
info->rate = context->sample_rate;
info->samples_per_frame = frame->nb_samples;
int bps = av_get_bits_per_sample(context->codec_id);
if (bps > 0 && context->channels > 0)
{
info->bitrate = (bps *
context->channels *
context->sample_rate);
}
else if (context->bit_rate > 0)
{
info->bitrate = context->bit_rate;
}
else
{
info->bitrate = 1;
}
if (truehd_mono)
{
info->channel_layout = AV_CH_LAYOUT_MONO;
}
else
{
info->channel_layout =
hb_ff_layout_xlat(context->channel_layout,
context->channels);
}
ret = 1;
break;
}
}
}
buf = buf->next;
}
info->profile = context->profile;
info->level = context->level;
info->channel_map = &hb_libav_chan_map;
if ( parser != NULL )
av_parser_close( parser );
hb_avcodec_close( context );
av_freep( &context->extradata );
av_free( context );
return ret;
}
/* -------------------------------------------------------------
* General purpose video decoder using libavcodec
*/
static uint8_t *copy_plane( uint8_t *dst, uint8_t* src, int dstride, int sstride,
int h )
{
if ( dstride == sstride )
{
memcpy( dst, src, dstride * h );
return dst + dstride * h;
}
int lbytes = dstride <= sstride? dstride : sstride;
while ( --h >= 0 )
{
memcpy( dst, src, lbytes );
src += sstride;
dst += dstride;
}
return dst;
}
// copy one video frame into an HB buf. If the frame isn't in our color space
// or at least one of its dimensions is odd, use sws_scale to convert/rescale it.
// Otherwise just copy the bits.
static hb_buffer_t *copy_frame( hb_work_private_t *pv )
{
AVCodecContext *context = pv->context;
int w, h;
if ( ! pv->job )
{
// HandBrake's video pipeline uses yuv420 color. This means all
// dimensions must be even. So we must adjust the dimensions
// of incoming video if not even.
w = context->width & ~1;
h = context->height & ~1;
}
else
{
w = pv->job->title->width;
h = pv->job->title->height;
}
#ifdef USE_HWD
if (pv->dxva2 && pv->job)
{
hb_buffer_t *buf;
int ww, hh;
buf = hb_video_buffer_init( w, h );
ww = w;
hh = h;
if( !pv->dst_frame )
{
pv->dst_frame = malloc( ww * hh * 3 / 2 );
}
if( hb_va_extract( pv->dxva2, pv->dst_frame, pv->frame, pv->job->width, pv->job->height, pv->job->title->crop, pv->opencl_scale, pv->job->use_opencl, pv->job->use_decomb, pv->job->use_detelecine ) == HB_WORK_ERROR )
{
hb_log( "hb_va_Extract failed!!!!!!" );
}
w = buf->plane[0].stride;
h = buf->plane[0].height;
uint8_t *dst = buf->plane[0].data;
copy_plane( dst, pv->dst_frame, w, ww, h );
w = buf->plane[1].stride;
h = buf->plane[1].height;
dst = buf->plane[1].data;
copy_plane( dst, pv->dst_frame + ww * hh, w, ww >> 1, h );
w = buf->plane[2].stride;
h = buf->plane[2].height;
dst = buf->plane[2].data;
copy_plane( dst, pv->dst_frame + ww * hh +( ( ww * hh ) >> 2 ), w, ww >> 1, h );
return buf;
}
else
#endif
{
hb_buffer_t *buf = hb_video_buffer_init( w, h );
#ifdef USE_QSV
// no need to copy the frame data when decoding with QSV to opaque memory
if (pv->qsv.decode &&
pv->qsv.config.io_pattern == MFX_IOPATTERN_OUT_OPAQUE_MEMORY)
{
buf->qsv_details.qsv_atom = pv->frame->data[2];
return buf;
}
#endif
uint8_t *dst = buf->data;
if (context->pix_fmt != AV_PIX_FMT_YUV420P || w != context->width ||
h != context->height)
{
// have to convert to our internal color space and/or rescale
AVPicture dstpic;
hb_avpicture_fill(&dstpic, buf);
if (pv->sws_context == NULL ||
pv->sws_width != context->width ||
pv->sws_height != context->height ||
pv->sws_pix_fmt != context->pix_fmt)
{
if (pv->sws_context != NULL)
sws_freeContext(pv->sws_context);
pv->sws_context = hb_sws_get_context(context->width,
context->height,
context->pix_fmt,
w, h, AV_PIX_FMT_YUV420P,
SWS_LANCZOS|SWS_ACCURATE_RND);
pv->sws_width = context->width;
pv->sws_height = context->height;
pv->sws_pix_fmt = context->pix_fmt;
}
sws_scale(pv->sws_context,
(const uint8_t* const *)pv->frame->data,
pv->frame->linesize,
0, context->height, dstpic.data, dstpic.linesize);
}
else
{
w = buf->plane[0].stride;
h = buf->plane[0].height;
dst = buf->plane[0].data;
copy_plane( dst, pv->frame->data[0], w, pv->frame->linesize[0], h );
w = buf->plane[1].stride;
h = buf->plane[1].height;
dst = buf->plane[1].data;
copy_plane( dst, pv->frame->data[1], w, pv->frame->linesize[1], h );
w = buf->plane[2].stride;
h = buf->plane[2].height;
dst = buf->plane[2].data;
copy_plane( dst, pv->frame->data[2], w, pv->frame->linesize[2], h );
}
return buf;
}
}
#ifdef USE_HWD
static int get_frame_buf_hwd( AVCodecContext *context, AVFrame *frame )
{
hb_work_private_t *pv = (hb_work_private_t*)context->opaque;
if ( (pv != NULL) && pv->dxva2 )
{
int result = HB_WORK_ERROR;
hb_work_private_t *pv = (hb_work_private_t*)context->opaque;
result = hb_va_get_frame_buf( pv->dxva2, context, frame );
if( result == HB_WORK_ERROR )
return avcodec_default_get_buffer( context, frame );
return 0;
}
else
return avcodec_default_get_buffer( context, frame );
}
static void hb_ffmpeg_release_frame_buf( struct AVCodecContext *p_context, AVFrame *frame )
{
hb_work_private_t *p_dec = (hb_work_private_t*)p_context->opaque;
int i;
if( p_dec->dxva2 )
{
hb_va_release( p_dec->dxva2, frame );
}
else if( !frame->opaque )
{
if( frame->type == FF_BUFFER_TYPE_INTERNAL )
avcodec_default_release_buffer( p_context, frame );
}
for( i = 0; i < 4; i++ )
frame->data[i] = NULL;
}
#endif
static void log_chapter( hb_work_private_t *pv, int chap_num, int64_t pts )
{
hb_chapter_t *c;
if ( !pv->job )
return;
c = hb_list_item( pv->job->list_chapter, chap_num - 1 );
if ( c && c->title )
{
hb_log( "%s: \"%s\" (%d) at frame %u time %"PRId64,
pv->context->codec->name, c->title, chap_num, pv->nframes, pts );
}
else
{
hb_log( "%s: Chapter %d at frame %u time %"PRId64,
pv->context->codec->name, chap_num, pv->nframes, pts );
}
}
static void flushDelayQueue( hb_work_private_t *pv )
{
hb_buffer_t *buf;
int slot = pv->queue_primed ? pv->nframes & (HEAP_SIZE-1) : 0;
// flush all the video packets left on our timestamp-reordering delay q
while ( ( buf = pv->delayq[slot] ) != NULL )
{
buf->s.start = heap_pop( &pv->pts_heap );
hb_list_add( pv->list, buf );
pv->delayq[slot] = NULL;
slot = ( slot + 1 ) & (HEAP_SIZE-1);
}
}
#define TOP_FIRST PIC_FLAG_TOP_FIELD_FIRST
#define PROGRESSIVE PIC_FLAG_PROGRESSIVE_FRAME
#define REPEAT_FIRST PIC_FLAG_REPEAT_FIRST_FIELD
#define TB 8
#define BT 16
#define BT_PROG 32
#define BTB_PROG 64
#define TB_PROG 128
#define TBT_PROG 256
static void checkCadence( int * cadence, uint16_t flags, int64_t start )
{
/* Rotate the cadence tracking. */
int i = 0;
for(i=11; i > 0; i--)
{
cadence[i] = cadence[i-1];
}
if ( !(flags & PROGRESSIVE) && !(flags & TOP_FIRST) )
{
/* Not progressive, not top first...
That means it's probably bottom
first, 2 fields displayed.
*/
//hb_log("MPEG2 Flag: Bottom field first, 2 fields displayed.");
cadence[0] = BT;
}
else if ( !(flags & PROGRESSIVE) && (flags & TOP_FIRST) )
{
/* Not progressive, top is first,
Two fields displayed.
*/
//hb_log("MPEG2 Flag: Top field first, 2 fields displayed.");
cadence[0] = TB;
}
else if ( (flags & PROGRESSIVE) && !(flags & TOP_FIRST) && !( flags & REPEAT_FIRST ) )
{
/* Progressive, but noting else.
That means Bottom first,
2 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive. Bottom field first, 2 fields displayed.");
cadence[0] = BT_PROG;
}
else if ( (flags & PROGRESSIVE) && !(flags & TOP_FIRST) && ( flags & REPEAT_FIRST ) )
{
/* Progressive, and repeat. .
That means Bottom first,
3 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive repeat. Bottom field first, 3 fields displayed.");
cadence[0] = BTB_PROG;
}
else if ( (flags & PROGRESSIVE) && (flags & TOP_FIRST) && !( flags & REPEAT_FIRST ) )
{
/* Progressive, top first.
That means top first,
2 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive. Top field first, 2 fields displayed.");
cadence[0] = TB_PROG;
}
else if ( (flags & PROGRESSIVE) && (flags & TOP_FIRST) && ( flags & REPEAT_FIRST ) )
{
/* Progressive, top, repeat.
That means top first,
3 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive repeat. Top field first, 3 fields displayed.");
cadence[0] = TBT_PROG;
}
if ( (cadence[2] <= TB) && (cadence[1] <= TB) && (cadence[0] > TB) && (cadence[11]) )
hb_log("%fs: Video -> Film", (float)start / 90000);
if ( (cadence[2] > TB) && (cadence[1] <= TB) && (cadence[0] <= TB) && (cadence[11]) )
hb_log("%fs: Film -> Video", (float)start / 90000);
}
// send cc_buf to the CC decoder(s)
static void cc_send_to_decoder(hb_work_private_t *pv, hb_buffer_t *buf)
{
if (buf == NULL)
return;
// if there's more than one decoder for the captions send a copy
// of the buffer to all.
hb_subtitle_t *subtitle;
int ii = 0, n = hb_list_count(pv->list_subtitle);
while (--n > 0)
{
// make a copy of the buf then forward it to the decoder
hb_buffer_t *cpy = hb_buffer_dup(buf);
subtitle = hb_list_item(pv->list_subtitle, ii++);
hb_fifo_push(subtitle->fifo_in, cpy);
}
subtitle = hb_list_item(pv->list_subtitle, ii);
hb_fifo_push( subtitle->fifo_in, buf );
}
static hb_buffer_t * cc_fill_buffer(hb_work_private_t *pv, uint8_t *cc, int size, int64_t pts)
{
int cc_count[4] = {0,};
int ii;
hb_buffer_t *buf = NULL;
for (ii = 0; ii < size; ii += 3)
{
if ((cc[ii] & 0x04) == 0) // not valid
continue;
if ((cc[ii+1] & 0x7f) == 0 && (cc[ii+2] & 0x7f) == 0) // stuffing
continue;
int type = cc[ii] & 0x03;
cc_count[type]++;
}
// Only handles CC1 for now.
if (cc_count[0] > 0)
{
buf = hb_buffer_init(cc_count[0] * 2);
buf->s.start = pts;
int jj = 0;
for (ii = 0; ii < size; ii += 3)
{
if ((cc[ii] & 0x04) == 0) // not valid
continue;
if ((cc[ii+1] & 0x7f) == 0 && (cc[ii+2] & 0x7f) == 0) // stuffing
continue;
int type = cc[ii] & 0x03;
if (type == 0)
{
buf->data[jj++] = cc[ii+1];
buf->data[jj++] = cc[ii+2];
}
}
}
return buf;
}
/*
* Decodes a video frame from the specified raw packet data
* ('data', 'size', 'sequence').
* The output of this function is stored in 'pv->list', which contains a list
* of zero or more decoded packets.
*
* The returned packets are guaranteed to have their timestamps in the correct
* order, even if the original packets decoded by libavcodec have misordered
* timestamps, due to the use of 'packed B-frames'.
*
* Internally the set of decoded packets may be buffered in 'pv->delayq'
* until enough packets have been decoded so that the timestamps can be
* correctly rewritten, if this is necessary.
*/
static int decodeFrame( hb_work_object_t *w, uint8_t *data, int size, int sequence, int64_t pts, int64_t dts, uint8_t frametype )
{
hb_work_private_t *pv = w->private_data;
int got_picture, oldlevel = 0;
AVPacket avp;
if ( global_verbosity_level <= 1 )
{
oldlevel = av_log_get_level();
av_log_set_level( AV_LOG_QUIET );
}
av_init_packet(&avp);
avp.data = data;
avp.size = size;
avp.pts = pts;
avp.dts = dts;
/*
* libav avcodec_decode_video2() needs AVPacket flagged with AV_PKT_FLAG_KEY
* for some codecs. For example, sequence of PNG in a mov container.
*/
if ( frametype & HB_FRAME_KEY )
{
avp.flags |= AV_PKT_FLAG_KEY;
}
#ifdef USE_QSV_PTS_WORKAROUND
/*
* The MediaSDK decoder will return decoded frames in the correct order,
* but *sometimes* with the incorrect timestamp assigned to them.
*
* We work around it by saving the input timestamps (in chronological order)
* and restoring them after decoding.
*/
if (pv->qsv.decode && avp.data != NULL)
{
hb_av_add_new_pts(pv->qsv.pts_list, avp.pts);
}
#endif
if ( avcodec_decode_video2( pv->context, pv->frame, &got_picture, &avp ) < 0 )
{
++pv->decode_errors;
}
#ifdef USE_QSV
if (pv->qsv.decode && pv->job->qsv.ctx == NULL && pv->video_codec_opened > 0)
{
// this is quite late, but we can't be certain that the QSV context is
// available until after we call avcodec_decode_video2() at least once
pv->job->qsv.ctx = pv->context->priv_data;
}
#endif
#ifdef USE_QSV_PTS_WORKAROUND
if (pv->qsv.decode && got_picture)
{
// we got a decoded frame, restore the lowest available PTS
pv->frame->pkt_pts = hb_av_pop_next_pts(pv->qsv.pts_list);
}
#endif
if ( global_verbosity_level <= 1 )
{
av_log_set_level( oldlevel );
}
if( got_picture )
{
uint16_t flags = 0;
// ffmpeg makes it hard to attach a pts to a frame. if the MPEG ES
// packet had a pts we handed it to av_parser_parse (if the packet had
// no pts we set it to AV_NOPTS_VALUE, but before the parse we can't
// distinguish between the start of a video frame with no pts & an
// intermediate packet of some frame which never has a pts). we hope
// that when parse returns the frame to us the pts we originally
// handed it will be in parser->pts. we put this pts into avp.pts so
// that when avcodec_decode_video finally gets around to allocating an
// AVFrame to hold the decoded frame, avcodec_default_get_buffer can
// stuff that pts into the it. if all of these relays worked at this
// point frame.pts should hold the frame's pts from the original data
// stream or AV_NOPTS_VALUE if it didn't have one. in the latter case
// we generate the next pts in sequence for it.
if ( !pv->frame_duration_set )
compute_frame_duration( pv );
double pts;
double frame_dur = pv->duration;
if ( pv->frame->repeat_pict )
{
frame_dur += pv->frame->repeat_pict * pv->field_duration;
}
#ifdef USE_HWD
if( pv->dxva2 && pv->dxva2->do_job == HB_WORK_OK )
{
if( avp.pts>0 )
{
if( pv->dxva2->input_pts[0] != 0 && pv->dxva2->input_pts[1] == 0 )
pv->frame->pkt_pts = pv->dxva2->input_pts[0];
else
pv->frame->pkt_pts = pv->dxva2->input_pts[0]dxva2->input_pts[1] ? pv->dxva2->input_pts[0] : pv->dxva2->input_pts[1];
}
}
#endif
// If there was no pts for this frame, assume constant frame rate
// video & estimate the next frame time from the last & duration.
if (pv->frame->pkt_pts == AV_NOPTS_VALUE || hb_gui_use_hwd_flag == 1)
{
pts = pv->pts_next;
}
else
{
pts = pv->frame->pkt_pts;
}
pv->pts_next = pts + frame_dur;
if ( pv->frame->top_field_first )
{
flags |= PIC_FLAG_TOP_FIELD_FIRST;
}
if ( !pv->frame->interlaced_frame )
{
flags |= PIC_FLAG_PROGRESSIVE_FRAME;
}
if ( pv->frame->repeat_pict == 1 )
{
flags |= PIC_FLAG_REPEAT_FIRST_FIELD;
}
if ( pv->frame->repeat_pict == 2 )
{
flags |= PIC_FLAG_REPEAT_FRAME;
}
// Check for CC data
AVFrameSideData *sd;
sd = av_frame_get_side_data(pv->frame, AV_FRAME_DATA_A53_CC);
if (sd != NULL)
{
if (!pv->job && pv->title && sd->size > 0)
{
hb_subtitle_t *subtitle;
int i = 0;
while ((subtitle = hb_list_item(pv->title->list_subtitle, i++)))
{
/*
* Let's call them 608 subs for now even if they aren't,
* since they are the only types we grok.
*/
if (subtitle->source == CC608SUB)
{
break;
}
}
if (subtitle == NULL)
{
subtitle = calloc(sizeof( hb_subtitle_t ), 1);
subtitle->track = 0;
subtitle->id = 0;
subtitle->format = TEXTSUB;
subtitle->source = CC608SUB;
subtitle->config.dest = PASSTHRUSUB;
subtitle->codec = WORK_DECCC608;
subtitle->type = 5;
snprintf(subtitle->lang, sizeof( subtitle->lang ),
"Closed Captions");
/*
* The language of the subtitles will be the same as the
* first audio track, i.e. the same as the video.
*/
hb_audio_t *audio = hb_list_item(pv->title->list_audio, 0);
if (audio != NULL)
{
snprintf(subtitle->iso639_2, sizeof(subtitle->iso639_2),
"%s", audio->config.lang.iso639_2);
} else {
snprintf(subtitle->iso639_2, sizeof(subtitle->iso639_2),
"und");
}
hb_list_add(pv->title->list_subtitle, subtitle);
}
}
if (pv->list_subtitle != NULL && sd->size > 0)
{
hb_buffer_t *cc_buf;
cc_buf = cc_fill_buffer(pv, sd->data, sd->size, pts);
cc_send_to_decoder(pv, cc_buf);
}
}
hb_buffer_t *buf;
// if we're doing a scan or this content couldn't have been broken
// by Microsoft we don't worry about timestamp reordering
if ( ! pv->job || ! pv->brokenByMicrosoft )
{
buf = copy_frame( pv );
av_frame_unref(pv->frame);
buf->s.start = pts;
buf->sequence = sequence;
buf->s.flags = flags;
if ( pv->new_chap && buf->s.start >= pv->chap_time )
{
buf->s.new_chap = pv->new_chap;
log_chapter( pv, pv->new_chap, buf->s.start );
pv->new_chap = 0;
pv->chap_time = 0;
}
else if ( pv->nframes == 0 && pv->job )
{
log_chapter( pv, pv->job->chapter_start, buf->s.start );
}
checkCadence( pv->cadence, flags, buf->s.start );
hb_list_add( pv->list, buf );
++pv->nframes;
return got_picture;
}
// XXX This following probably addresses a libavcodec bug but I don't
// see an easy fix so we workaround it here.
//
// The M$ 'packed B-frames' atrocity results in decoded frames with
// the wrong timestamp. E.g., if there are 2 b-frames the timestamps
// we see here will be "2 3 1 5 6 4 ..." instead of "1 2 3 4 5 6".
// The frames are actually delivered in the right order but with
// the wrong timestamp. To get the correct timestamp attached to
// each frame we have a delay queue (longer than the max number of
// b-frames) & a sorting heap for the timestamps. As each frame
// comes out of the decoder the oldest frame in the queue is removed
// and associated with the smallest timestamp. Then the new frame is
// added to the queue & its timestamp is pushed on the heap.
// This does nothing if the timestamps are correct (i.e., the video
// uses a codec that Micro$oft hasn't broken yet) but the frames
// get timestamped correctly even when M$ has munged them.
// remove the oldest picture from the frame queue (if any) &
// give it the smallest timestamp from our heap. The queue size
// is a power of two so we get the slot of the oldest by masking
// the frame count & this will become the slot of the newest
// once we've removed & processed the oldest.
int slot = pv->nframes & (HEAP_SIZE-1);
if ( ( buf = pv->delayq[slot] ) != NULL )
{
pv->queue_primed = 1;
buf->s.start = heap_pop( &pv->pts_heap );
if ( pv->new_chap && buf->s.start >= pv->chap_time )
{
buf->s.new_chap = pv->new_chap;
log_chapter( pv, pv->new_chap, buf->s.start );
pv->new_chap = 0;
pv->chap_time = 0;
}
else if ( pv->nframes == 0 && pv->job )
{
log_chapter( pv, pv->job->chapter_start, buf->s.start );
}
checkCadence( pv->cadence, buf->s.flags, buf->s.start );
hb_list_add( pv->list, buf );
}
// add the new frame to the delayq & push its timestamp on the heap
buf = copy_frame( pv );
av_frame_unref(pv->frame);
buf->sequence = sequence;
/* Store picture flags for later use by filters */
buf->s.flags = flags;
pv->delayq[slot] = buf;
heap_push( &pv->pts_heap, pts );
++pv->nframes;
}
return got_picture;
}
static void decodeVideo( hb_work_object_t *w, uint8_t *data, int size, int sequence, int64_t pts, int64_t dts, uint8_t frametype )
{
hb_work_private_t *pv = w->private_data;
/*
* The following loop is a do..while because we need to handle both
* data & the flush at the end (signaled by size=0). At the end there's
* generally a frame in the parser & one or more frames in the decoder
* (depending on the bframes setting).
*/
int pos = 0;
do {
uint8_t *pout;
int pout_len, len;
int64_t parser_pts, parser_dts;
if ( pv->parser )
{
len = av_parser_parse2( pv->parser, pv->context, &pout, &pout_len,
data + pos, size - pos, pts, dts, 0 );
parser_pts = pv->parser->pts;
parser_dts = pv->parser->dts;
}
else
{
pout = data;
len = pout_len = size;
parser_pts = pts;
parser_dts = dts;
}
pos += len;
if ( pout_len > 0 )
{
decodeFrame( w, pout, pout_len, sequence, parser_pts, parser_dts, frametype );
}
} while ( pos < size );
/* the stuff above flushed the parser, now flush the decoder */
if (size <= 0)
{
while (decodeFrame(w, NULL, 0, sequence, AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0))
{
continue;
}
#ifdef USE_QSV
if (pv->qsv.decode)
{
// flush a second time
while (decodeFrame(w, NULL, 0, sequence, AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0))
{
continue;
}
}
#endif
flushDelayQueue(pv);
if (pv->list_subtitle != NULL)
cc_send_to_decoder(pv, hb_buffer_init(0));
}
}
/*
* Removes all packets from 'pv->list', links them together into
* a linked-list, and returns the first packet in the list.
*/
static hb_buffer_t *link_buf_list( hb_work_private_t *pv )
{
hb_buffer_t *head = hb_list_item( pv->list, 0 );
if ( head )
{
hb_list_rem( pv->list, head );
hb_buffer_t *last = head, *buf;
while ( ( buf = hb_list_item( pv->list, 0 ) ) != NULL )
{
hb_list_rem( pv->list, buf );
last->next = buf;
last = buf;
}
}
return head;
}
static int decavcodecvInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t *pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->wait_for_keyframe = 60;
pv->job = job;
if ( job )
pv->title = job->title;
else
pv->title = w->title;
pv->list = hb_list_init();
#ifdef USE_QSV
if (hb_qsv_decode_is_enabled(job))
{
// setup the QSV configuration
pv->qsv.config.io_pattern = MFX_IOPATTERN_OUT_OPAQUE_MEMORY;
pv->qsv.config.impl_requested = hb_qsv_impl_get_preferred();
pv->qsv.config.async_depth = job->qsv.async_depth;
pv->qsv.config.sync_need = 0;
pv->qsv.config.usage_threaded = 1;
pv->qsv.config.additional_buffers = 64; // FIFO_LARGE
if (hb_qsv_info->capabilities & HB_QSV_CAP_OPTION2_LOOKAHEAD)
{
// more surfaces may be needed for the lookahead
pv->qsv.config.additional_buffers = 160;
}
pv->qsv.codec_name = hb_qsv_decode_get_codec_name(w->codec_param);
pv->qsv.decode = 1;
}
else
{
pv->qsv.decode = 0;
}
#endif
if( pv->job && pv->job->title && !pv->job->title->has_resolution_change )
{
pv->threads = HB_FFMPEG_THREADS_AUTO;
}
AVCodec *codec = NULL;
#ifdef USE_QSV
if (pv->qsv.decode)
{
codec = avcodec_find_decoder_by_name(pv->qsv.codec_name);
}
else
#endif
{
codec = avcodec_find_decoder(w->codec_param);
}
if ( codec == NULL )
{
hb_log( "decavcodecvInit: failed to find codec for id (%d)", w->codec_param );
return 1;
}
if ( pv->title->opaque_priv )
{
AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv;
pv->context = avcodec_alloc_context3(codec);
avcodec_copy_context( pv->context, ic->streams[pv->title->video_id]->codec);
pv->context->workaround_bugs = FF_BUG_AUTODETECT;
pv->context->err_recognition = AV_EF_CRCCHECK;
pv->context->error_concealment = FF_EC_GUESS_MVS|FF_EC_DEBLOCK;
#ifdef USE_HWD
// QSV decoding is faster, so prefer it to DXVA2
if (pv->job != NULL && !pv->qsv.decode && pv->job->use_hwd &&
hb_use_dxva(pv->title))
{
pv->dxva2 = hb_va_create_dxva2( pv->dxva2, w->codec_param );
if( pv->dxva2 && pv->dxva2->do_job == HB_WORK_OK )
{
hb_va_new_dxva2( pv->dxva2, pv->context );
pv->context->slice_flags |= SLICE_FLAG_ALLOW_FIELD;
pv->context->opaque = pv;
pv->context->get_buffer = get_frame_buf_hwd;
pv->context->release_buffer = hb_ffmpeg_release_frame_buf;
pv->context->get_format = hb_ffmpeg_get_format;
pv->opencl_scale = ( hb_oclscale_t * )malloc( sizeof( hb_oclscale_t ) );
memset( pv->opencl_scale, 0, sizeof( hb_oclscale_t ) );
pv->threads = 1;
}
}
#endif
#ifdef USE_QSV
if (pv->qsv.decode)
{
#ifdef USE_QSV_PTS_WORKAROUND
pv->qsv.pts_list = hb_list_init();
#endif
// set the QSV configuration before opening the decoder
pv->context->hwaccel_context = &pv->qsv.config;
}
#endif
// Set encoder opts...
AVDictionary * av_opts = NULL;
av_dict_set( &av_opts, "refcounted_frames", "1", 0 );
if ( hb_avcodec_open( pv->context, codec, &av_opts, pv->threads ) )
{
av_dict_free( &av_opts );
hb_log( "decavcodecvInit: avcodec_open failed" );
return 1;
}
av_dict_free( &av_opts );
pv->video_codec_opened = 1;
// avi, mkv and possibly mp4 containers can contain the M$ VFW packed
// b-frames abortion that messes up frame ordering and timestamps.
// XXX ffmpeg knows which streams are broken but doesn't expose the
// info externally. We should patch ffmpeg to add a flag to the
// codec context for this but until then we mark all ffmpeg streams
// as suspicious.
pv->brokenByMicrosoft = 1;
}
else
{
pv->parser = av_parser_init( w->codec_param );
}
pv->frame = av_frame_alloc();
if (pv->frame == NULL)
{
hb_log("decavcodecvInit: av_frame_alloc failed");
return 1;
}
/*
* If not scanning, then are we supposed to extract Closed Captions
* and send them to the decoder?
*/
if (job != NULL && hb_list_count(job->list_subtitle) > 0)
{
hb_subtitle_t *subtitle;
int i = 0;
while ((subtitle = hb_list_item(job->list_subtitle, i++)) != NULL)
{
if (subtitle->source == CC608SUB)
{
if (pv->list_subtitle == NULL)
{
pv->list_subtitle = hb_list_init();
}
hb_list_add(pv->list_subtitle, subtitle);
}
}
}
return 0;
}
static int next_hdr( hb_buffer_t *in, int offset )
{
uint8_t *dat = in->data;
uint16_t last2 = 0xffff;
for ( ; in->size - offset > 1; ++offset )
{
if ( last2 == 0 && dat[offset] == 0x01 )
// found an mpeg start code
return offset - 2;
last2 = ( last2 << 8 ) | dat[offset];
}
return -1;
}
static int find_hdr( hb_buffer_t *in, int offset, uint8_t hdr_type )
{
if ( in->size - offset < 4 )
// not enough room for an mpeg start code
return -1;
for ( ; ( offset = next_hdr( in, offset ) ) >= 0; ++offset )
{
if ( in->data[offset+3] == hdr_type )
// found it
break;
}
return offset;
}
static int setup_extradata( hb_work_object_t *w, hb_buffer_t *in )
{
hb_work_private_t *pv = w->private_data;
// we can't call the avstream funcs but the read_header func in the
// AVInputFormat may set up some state in the AVContext. In particular
// vc1t_read_header allocates 'extradata' to deal with header issues
// related to Microsoft's bizarre engineering notions. We alloc a chunk
// of space to make vc1 work then associate the codec with the context.
if ( w->codec_param != AV_CODEC_ID_VC1 )
{
// we haven't been inflicted with M$ - allocate a little space as
// a marker and return success.
pv->context->extradata_size = 0;
// av_malloc uses posix_memalign which is allowed to
// return NULL when allocating 0 bytes. We use extradata == NULL
// to trigger initialization of extradata and the decoder, so
// we can not set it to NULL here. So allocate a small
// buffer instead.
pv->context->extradata = av_malloc(1);
return 0;
}
// find the start and and of the sequence header
int shdr, shdr_end;
if ( ( shdr = find_hdr( in, 0, 0x0f ) ) < 0 )
{
// didn't find start of seq hdr
return 1;
}
if ( ( shdr_end = next_hdr( in, shdr + 4 ) ) < 0 )
{
shdr_end = in->size;
}
shdr_end -= shdr;
// find the start and and of the entry point header
int ehdr, ehdr_end;
if ( ( ehdr = find_hdr( in, 0, 0x0e ) ) < 0 )
{
// didn't find start of entry point hdr
return 1;
}
if ( ( ehdr_end = next_hdr( in, ehdr + 4 ) ) < 0 )
{
ehdr_end = in->size;
}
ehdr_end -= ehdr;
// found both headers - allocate an extradata big enough to hold both
// then copy them into it.
pv->context->extradata_size = shdr_end + ehdr_end;
pv->context->extradata = av_malloc(pv->context->extradata_size + 8);
memcpy( pv->context->extradata, in->data + shdr, shdr_end );
memcpy( pv->context->extradata + shdr_end, in->data + ehdr, ehdr_end );
memset( pv->context->extradata + shdr_end + ehdr_end, 0, 8);
return 0;
}
static int decavcodecvWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t *pv = w->private_data;
hb_buffer_t *in = *buf_in;
int64_t pts = AV_NOPTS_VALUE;
int64_t dts = pts;
*buf_in = NULL;
*buf_out = NULL;
/* if we got an empty buffer signaling end-of-stream send it downstream */
if ( in->size == 0 )
{
if (pv->context != NULL && pv->context->codec != NULL)
{
decodeVideo( w, in->data, in->size, in->sequence, pts, dts, in->s.frametype );
}
hb_list_add( pv->list, in );
*buf_out = link_buf_list( pv );
return HB_WORK_DONE;
}
// if this is the first frame open the codec (we have to wait for the
// first frame because of M$ VC1 braindamage).
if ( !pv->video_codec_opened )
{
AVCodec *codec = NULL;
#ifdef USE_QSV
if (pv->qsv.decode)
{
codec = avcodec_find_decoder_by_name(pv->qsv.codec_name);
}
else
#endif
{
codec = avcodec_find_decoder(w->codec_param);
}
if ( codec == NULL )
{
hb_log( "decavcodecvWork: failed to find codec for id (%d)", w->codec_param );
*buf_out = hb_buffer_init( 0 );;
return HB_WORK_DONE;
}
pv->context = avcodec_alloc_context3( codec );
pv->context->workaround_bugs = FF_BUG_AUTODETECT;
pv->context->err_recognition = AV_EF_CRCCHECK;
pv->context->error_concealment = FF_EC_GUESS_MVS|FF_EC_DEBLOCK;
if ( setup_extradata( w, in ) )
{
// we didn't find the headers needed to set up extradata.
// the codec will abort if we open it so just free the buf
// and hope we eventually get the info we need.
hb_buffer_close( &in );
return HB_WORK_OK;
}
#ifdef USE_QSV
if (pv->qsv.decode)
{
#ifdef USE_QSV_PTS_WORKAROUND
pv->qsv.pts_list = hb_list_init();
#endif
// set the QSV configuration before opening the decoder
pv->context->hwaccel_context = &pv->qsv.config;
}
#endif
AVDictionary * av_opts = NULL;
av_dict_set( &av_opts, "refcounted_frames", "1", 0 );
// disable threaded decoding for scan, can cause crashes
if ( hb_avcodec_open( pv->context, codec, &av_opts, pv->threads ) )
{
av_dict_free( &av_opts );
hb_log( "decavcodecvWork: avcodec_open failed" );
*buf_out = hb_buffer_init( 0 );;
return HB_WORK_DONE;
}
av_dict_free( &av_opts );
pv->video_codec_opened = 1;
}
if( in->s.start >= 0 )
{
pts = in->s.start;
dts = in->s.renderOffset;
}
if ( in->s.new_chap )
{
pv->new_chap = in->s.new_chap;
pv->chap_time = pts >= 0? pts : pv->pts_next;
}
#ifdef USE_HWD
if( pv->dxva2 && pv->dxva2->do_job == HB_WORK_OK )
{
if( pv->dxva2->input_pts[0] <= pv->dxva2->input_pts[1] )
pv->dxva2->input_pts[0] = pts;
else if( pv->dxva2->input_pts[0] > pv->dxva2->input_pts[1] )
pv->dxva2->input_pts[1] = pts;
pv->dxva2->input_dts = dts;
}
#endif
decodeVideo( w, in->data, in->size, in->sequence, pts, dts, in->s.frametype );
hb_buffer_close( &in );
*buf_out = link_buf_list( pv );
return HB_WORK_OK;
}
static void compute_frame_duration( hb_work_private_t *pv )
{
double duration = 0.;
int64_t max_fps = 64L;
// context->time_base may be in fields, so set the max *fields* per second
if ( pv->context->ticks_per_frame > 1 )
max_fps *= pv->context->ticks_per_frame;
if ( pv->title->opaque_priv )
{
// If ffmpeg is demuxing for us, it collects some additional
// information about framerates that is often more accurate
// than context->time_base.
AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv;
AVStream *st = ic->streams[pv->title->video_id];
if ( st->nb_frames && st->duration )
{
// compute the average frame duration from the total number
// of frames & the total duration.
duration = ( (double)st->duration * (double)st->time_base.num ) /
( (double)st->nb_frames * (double)st->time_base.den );
}
// Raw demuxers set a default fps of 25 and do not parse
// a value from the container. So use the codec time_base
// for raw demuxers.
else if (ic->iformat->raw_codec_id == AV_CODEC_ID_NONE)
{
// XXX We don't have a frame count or duration so try to use the
// far less reliable time base info in the stream.
// Because the time bases are so screwed up, we only take values
// in the range 8fps - 64fps.
AVRational *tb = NULL;
if ( st->avg_frame_rate.den * 64L > st->avg_frame_rate.num &&
st->avg_frame_rate.num > st->avg_frame_rate.den * 8L )
{
tb = &(st->avg_frame_rate);
duration = (double)tb->den / (double)tb->num;
}
else if ( st->time_base.num * 64L > st->time_base.den &&
st->time_base.den > st->time_base.num * 8L )
{
tb = &(st->time_base);
duration = (double)tb->num / (double)tb->den;
}
}
if ( !duration &&
pv->context->time_base.num * max_fps > pv->context->time_base.den &&
pv->context->time_base.den > pv->context->time_base.num * 8L )
{
duration = (double)pv->context->time_base.num /
(double)pv->context->time_base.den;
if ( pv->context->ticks_per_frame > 1 )
{
// for ffmpeg 0.5 & later, the H.264 & MPEG-2 time base is
// field rate rather than frame rate so convert back to frames.
duration *= pv->context->ticks_per_frame;
}
}
}
else
{
if ( pv->context->time_base.num * max_fps > pv->context->time_base.den &&
pv->context->time_base.den > pv->context->time_base.num * 8L )
{
duration = (double)pv->context->time_base.num /
(double)pv->context->time_base.den;
if ( pv->context->ticks_per_frame > 1 )
{
// for ffmpeg 0.5 & later, the H.264 & MPEG-2 time base is
// field rate rather than frame rate so convert back to frames.
duration *= pv->context->ticks_per_frame;
}
}
}
if ( duration == 0 )
{
// No valid timing info found in the stream, so pick some value
duration = 1001. / 24000.;
}
else
{
pv->frame_duration_set = 1;
}
pv->duration = duration * 90000.;
pv->field_duration = pv->duration;
if ( pv->context->ticks_per_frame > 1 )
{
pv->field_duration /= pv->context->ticks_per_frame;
}
}
static int decavcodecvInfo( hb_work_object_t *w, hb_work_info_t *info )
{
hb_work_private_t *pv = w->private_data;
memset( info, 0, sizeof(*info) );
info->bitrate = pv->context->bit_rate;
// HandBrake's video pipeline uses yuv420 color. This means all
// dimensions must be even. So we must adjust the dimensions
// of incoming video if not even.
info->width = pv->context->width & ~1;
info->height = pv->context->height & ~1;
info->pixel_aspect_width = pv->context->sample_aspect_ratio.num;
info->pixel_aspect_height = pv->context->sample_aspect_ratio.den;
compute_frame_duration( pv );
info->rate = 27000000;
info->rate_base = pv->duration * 300.;
info->profile = pv->context->profile;
info->level = pv->context->level;
info->name = pv->context->codec->name;
switch( pv->context->color_primaries )
{
case AVCOL_PRI_BT709:
info->color_prim = HB_COLR_PRI_BT709;
break;
case AVCOL_PRI_BT470BG:
info->color_prim = HB_COLR_PRI_EBUTECH;
break;
case AVCOL_PRI_BT470M:
case AVCOL_PRI_SMPTE170M:
case AVCOL_PRI_SMPTE240M:
info->color_prim = HB_COLR_PRI_SMPTEC;
break;
default:
{
if( ( info->width >= 1280 || info->height >= 720 ) ||
( info->width > 720 && info->height > 576 ) )
// ITU BT.709 HD content
info->color_prim = HB_COLR_PRI_BT709;
else if( info->rate_base == 1080000 )
// ITU BT.601 DVD or SD TV content (PAL)
info->color_prim = HB_COLR_PRI_EBUTECH;
else
// ITU BT.601 DVD or SD TV content (NTSC)
info->color_prim = HB_COLR_PRI_SMPTEC;
break;
}
}
switch( pv->context->color_trc )
{
case AVCOL_TRC_SMPTE240M:
info->color_transfer = HB_COLR_TRA_SMPTE240M;
break;
default:
// ITU BT.601, BT.709, anything else
info->color_transfer = HB_COLR_TRA_BT709;
break;
}
switch( pv->context->colorspace )
{
case AVCOL_SPC_BT709:
info->color_matrix = HB_COLR_MAT_BT709;
break;
case AVCOL_SPC_FCC:
case AVCOL_SPC_BT470BG:
case AVCOL_SPC_SMPTE170M:
case AVCOL_SPC_RGB: // libswscale rgb2yuv
info->color_matrix = HB_COLR_MAT_SMPTE170M;
break;
case AVCOL_SPC_SMPTE240M:
info->color_matrix = HB_COLR_MAT_SMPTE240M;
break;
default:
{
if( ( info->width >= 1280 || info->height >= 720 ) ||
( info->width > 720 && info->height > 576 ) )
// ITU BT.709 HD content
info->color_matrix = HB_COLR_MAT_BT709;
else
// ITU BT.601 DVD or SD TV content (PAL)
// ITU BT.601 DVD or SD TV content (NTSC)
info->color_matrix = HB_COLR_MAT_SMPTE170M;
break;
}
}
info->video_decode_support = HB_DECODE_SUPPORT_SW;
switch (pv->context->codec_id)
{
case AV_CODEC_ID_H264:
if (pv->context->pix_fmt == AV_PIX_FMT_YUV420P ||
pv->context->pix_fmt == AV_PIX_FMT_YUVJ420P)
{
#ifdef USE_QSV
info->video_decode_support |= HB_DECODE_SUPPORT_QSV;
#endif
}
break;
default:
break;
}
return 1;
}
static int decavcodecvBSInfo( hb_work_object_t *w, const hb_buffer_t *buf,
hb_work_info_t *info )
{
return 0;
}
static void decavcodecvFlush( hb_work_object_t *w )
{
hb_work_private_t *pv = w->private_data;
if (pv->context != NULL && pv->context->codec != NULL)
{
flushDelayQueue( pv );
hb_buffer_t *buf = link_buf_list( pv );
hb_buffer_close( &buf );
if ( pv->title->opaque_priv == NULL )
{
pv->video_codec_opened = 0;
hb_avcodec_close( pv->context );
av_freep( &pv->context->extradata );
av_free( pv->context );
if ( pv->parser )
{
av_parser_close(pv->parser);
}
pv->parser = av_parser_init( w->codec_param );
}
else
{
avcodec_flush_buffers( pv->context );
}
}
pv->wait_for_keyframe = 60;
}
hb_work_object_t hb_decavcodecv =
{
.id = WORK_DECAVCODECV,
.name = "Video decoder (libavcodec)",
.init = decavcodecvInit,
.work = decavcodecvWork,
.close = decavcodecClose,
.flush = decavcodecvFlush,
.info = decavcodecvInfo,
.bsinfo = decavcodecvBSInfo
};
static void decodeAudio(hb_audio_t *audio, hb_work_private_t *pv, uint8_t *data,
int size, int64_t pts)
{
AVCodecContext *context = pv->context;
int loop_limit = 256;
int pos = 0;
// If we are given a pts, use it; but don't lose partial ticks.
if (pts != -1 && (int64_t)pv->pts_next != pts)
pv->pts_next = pts;
while (pos < size)
{
int got_frame;
AVPacket avp;
av_init_packet(&avp);
avp.data = data + pos;
avp.size = size - pos;
avp.pts = pv->pts_next;
avp.dts = AV_NOPTS_VALUE;
int len = avcodec_decode_audio4(context, pv->frame, &got_frame, &avp);
if ((len < 0) || (!got_frame && !(loop_limit--)))
{
return;
}
else
{
loop_limit = 256;
}
pos += len;
// set the duration on every frame since the stream format can
// change (it shouldn't but there's no way to guarantee it).
// duration is a scaling factor to go from #bytes in the decoded
// frame to frame time (in 90KHz mpeg ticks). 'channels' converts
// total samples to per-channel samples. 'sample_rate' converts
// per-channel samples to seconds per sample and the 90000
// is mpeg ticks per second.
//
// Also, sample rate is not available until we have decoded some
// audio.
if ( pv->context->sample_rate )
{
pv->duration = 90000. / (double)( pv->context->sample_rate );
}
if (got_frame)
{
hb_buffer_t *out;
double duration = pv->frame->nb_samples * pv->duration;
double pts_next = pv->pts_next + duration;
if (audio->config.out.codec & HB_ACODEC_PASS_FLAG)
{
// Note that even though we are doing passthru, we had to decode
// so that we know the stop time and the pts of the next audio
// packet.
out = hb_buffer_init(avp.size);
memcpy(out->data, avp.data, avp.size);
}
else
{
hb_audio_resample_set_channel_layout(pv->resample,
context->channel_layout,
context->channels);
hb_audio_resample_set_sample_fmt(pv->resample,
context->sample_fmt);
if (hb_audio_resample_update(pv->resample))
{
hb_log("decavcodec: hb_audio_resample_update() failed");
av_frame_unref(pv->frame);
return;
}
out = hb_audio_resample(pv->resample, pv->frame->extended_data,
pv->frame->nb_samples);
}
av_frame_unref(pv->frame);
if (out != NULL)
{
out->s.start = pv->pts_next;
out->s.duration = duration;
out->s.stop = pts_next;
pv->pts_next = pts_next;
hb_list_add(pv->list, out);
}
}
}
}