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author | Roman Shaposhnik <roman@shaposhnik.org> | 2003-07-30 22:37:43 +0000 |
---|---|---|
committer | Roman Shaposhnik <roman@shaposhnik.org> | 2003-07-30 22:37:43 +0000 |
commit | e7d0374f2763a95965750c442bfb690387150321 (patch) | |
tree | a124b7b6acf56d58c41cf10a76670005d49abb17 /ffmpeg.c | |
parent | 302898fcbe604a088f9a3db4c4747b0d735b611a (diff) | |
download | ffmpeg-e7d0374f2763a95965750c442bfb690387150321.tar.gz |
A/V sync patch from Gildas Bazin.
Originally committed as revision 2098 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'ffmpeg.c')
-rw-r--r-- | ffmpeg.c | 109 |
1 files changed, 49 insertions, 60 deletions
@@ -205,7 +205,8 @@ typedef struct AVInputStream { int64_t start; /* time when read started */ unsigned long frame; /* current frame */ - AVFrac pts; /* synthetic pts for cases where pkt.pts == 0 */ + AVFrac next_pts; /* synthetic pts for cases where pkt.pts == 0 */ + int64_t pts; /* current pts */ } AVInputStream; typedef struct AVInputFile { @@ -472,42 +473,33 @@ static void do_video_out(AVFormatContext *s, but not for the general case */ if (audio_sync) { /* compute the A-V delay and duplicate/remove frames if needed */ - double adelta, vdelta, apts, vpts, av_delay; - - if (audio_sync->sync_ipts != AV_NOPTS_VALUE && - ost->sync_ipts != AV_NOPTS_VALUE) { - - adelta = (double)(ost->st->pts.val - audio_sync->sync_opts) * - s->pts_num / s->pts_den; - apts = audio_sync->sync_ipts + adelta; - - vdelta = (double)(ost->st->pts.val - ost->sync_opts) * - s->pts_num / s->pts_den; - vpts = ost->sync_ipts + vdelta; - - av_delay = apts - vpts; - // printf("delay=%f\n", av_delay); - if (av_delay < -AV_DELAY_MAX) - nb_frames = 2; - else if (av_delay > AV_DELAY_MAX) - nb_frames = 0; - } + double adelta, vdelta, av_delay; + + adelta = audio_sync->sync_ipts - ((double)audio_sync->sync_opts * + s->pts_num / s->pts_den); + + vdelta = ost->sync_ipts - ((double)ost->sync_opts * + s->pts_num / s->pts_den); + + av_delay = adelta - vdelta; + // printf("delay=%f\n", av_delay); + if (av_delay < -AV_DELAY_MAX) + nb_frames = 2; + else if (av_delay > AV_DELAY_MAX) + nb_frames = 0; } else { double vdelta; - if (ost->sync_ipts != AV_NOPTS_VALUE) { - vdelta = (double)(ost->st->pts.val) * s->pts_num / s->pts_den - (ost->sync_ipts - ost->sync_ipts_offset); - if (vdelta < 100 && vdelta > -100 && ost->sync_ipts_offset) { - if (vdelta < -AV_DELAY_MAX) - nb_frames = 2; - else if (vdelta > AV_DELAY_MAX) - nb_frames = 0; - } else { - ost->sync_ipts_offset -= vdelta; - if (!ost->sync_ipts_offset) - ost->sync_ipts_offset = 0.000001; /* one microsecond */ - } - + vdelta = (double)(ost->st->pts.val) * s->pts_num / s->pts_den - (ost->sync_ipts - ost->sync_ipts_offset); + if (vdelta < 100 && vdelta > -100 && ost->sync_ipts_offset) { + if (vdelta < -AV_DELAY_MAX) + nb_frames = 2; + else if (vdelta > AV_DELAY_MAX) + nb_frames = 0; + } else { + ost->sync_ipts_offset -= vdelta; + if (!ost->sync_ipts_offset) + ost->sync_ipts_offset = 0.000001; /* one microsecond */ } } @@ -1108,13 +1100,14 @@ static int av_encode(AVFormatContext **output_files, for(i=0;i<nb_istreams;i++) { ist = ist_table[i]; is = input_files[ist->file_index]; + ist->pts = 0; switch (ist->st->codec.codec_type) { case CODEC_TYPE_AUDIO: - av_frac_init(&ist->pts, + av_frac_init(&ist->next_pts, 0, 0, is->pts_num * ist->st->codec.sample_rate); break; case CODEC_TYPE_VIDEO: - av_frac_init(&ist->pts, + av_frac_init(&ist->next_pts, 0, 0, is->pts_num * ist->st->codec.frame_rate); break; default: @@ -1220,10 +1213,6 @@ static int av_encode(AVFormatContext **output_files, len = pkt.size; ptr = pkt.data; while (len > 0) { - int64_t ipts; - - ipts = AV_NOPTS_VALUE; - /* decode the packet if needed */ data_buf = NULL; /* fail safe */ data_size = 0; @@ -1233,8 +1222,15 @@ static int av_encode(AVFormatContext **output_files, /* NOTE2: even if the fraction is not initialized, av_frac_set can be used to set the integer part */ if (ist->frame_decoded) { - /* If pts is unavailable -- we have to use synthetic one */ - ipts = (pkt.pts == AV_NOPTS_VALUE) ? ist->pts.val : pkt.pts; + /* If pts is unavailable -- we have to use synthetic one */ + if( pkt.pts != AV_NOPTS_VALUE ) + { + ist->pts = ist->next_pts.val = pkt.pts; + } + else + { + ist->pts = ist->next_pts.val; + } ist->frame_decoded = 0; } @@ -1255,7 +1251,7 @@ static int av_encode(AVFormatContext **output_files, continue; } data_buf = (uint8_t *)samples; - av_frac_add(&ist->pts, + av_frac_add(&ist->next_pts, is->pts_den * data_size / (2 * ist->st->codec.channels)); break; case CODEC_TYPE_VIDEO: @@ -1280,7 +1276,7 @@ static int av_encode(AVFormatContext **output_files, len -= ret; continue; } - av_frac_add(&ist->pts, + av_frac_add(&ist->next_pts, is->pts_den * ist->st->codec.frame_rate_base); } break; @@ -1334,23 +1330,17 @@ static int av_encode(AVFormatContext **output_files, if (ost->source_index == ist_index) { os = output_files[ost->file_index]; - if (ipts != AV_NOPTS_VALUE) { #if 0 - printf("%d: got pts=%f %f\n", - i, pkt.pts / 90000.0, - (ipts - ost->st->pts.val) / 90000.0); + printf("%d: got pts=%f %f\n", i, pkt.pts / 90000.0, + (ist->pts - ost->st->pts.val) / 90000.0); #endif - /* set the input output pts pairs */ - ost->sync_ipts = (double)ipts * is->pts_num / - is->pts_den; - /* XXX: take into account the various fifos, - in particular for audio */ - ost->sync_opts = ost->st->pts.val; - //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt.pts=%lld\n", ipts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt.pts); - } else { - //printf("pts.val=%lld\n", ost->st->pts.val); - ost->sync_ipts = AV_NOPTS_VALUE; - } + /* set the input output pts pairs */ + ost->sync_ipts = (double)ist->pts * is->pts_num / + is->pts_den; + /* XXX: take into account the various fifos, + in particular for audio */ + ost->sync_opts = ost->st->pts.val; + //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt.pts=%lld\n", ist->pts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt.pts); if (ost->encoding_needed) { switch(ost->st->codec.codec_type) { @@ -1397,7 +1387,6 @@ static int av_encode(AVFormatContext **output_files, } } av_free(buffer_to_free); - ipts = AV_NOPTS_VALUE; } discard_packet: av_free_packet(&pkt); |