diff options
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/dv.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/libavformat/dv.c b/libavformat/dv.c index 227caf168f..d01ecedc62 100644 --- a/libavformat/dv.c +++ b/libavformat/dv.c @@ -71,6 +71,7 @@ struct DVDemuxContext { int frames; int64_t next_pts_video; + int64_t next_pts_audio; }; static inline uint16_t dv_audio_12to16(uint16_t sample) @@ -282,7 +283,7 @@ static int dv_extract_audio_info(DVDemuxContext *c, const uint8_t *frame) if (!c->ast[i]) return AVERROR(ENOMEM); - avpriv_set_pts_info(c->ast[i], 64, c->sys->time_base.num, c->sys->time_base.den); + avpriv_set_pts_info(c->ast[i], 64, 1, DV_TIMESCALE_AUDIO); c->ast[i]->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; c->ast[i]->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; c->ast[i]->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; @@ -421,6 +422,7 @@ int avpriv_dv_get_packet(DVDemuxContext *c, AVPacket *pkt) int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt, uint8_t *buf, int buf_size, int64_t pos) { + int64_t pts, duration; int size, i; uint8_t *ppcm[5] = { 0 }; @@ -436,13 +438,30 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt, if (size < 0) return size; + if (c->ach) { + int64_t next_pts_video = av_rescale_q(c->next_pts_video, c->vst->time_base, + c->ast[0]->time_base); + + duration = av_rescale_q(size / 4, + (AVRational){ 1, c->audio_pkt[0].sample_rate }, + c->ast[0]->time_base); + + // if audio timestamps are more than one frame away from video, + // assume desync happened (e.g. due to dropped audio frames) and + // resynchronize + pts = (FFABS(next_pts_video - c->next_pts_audio) >= duration) ? + next_pts_video : c->next_pts_audio; + + c->next_pts_audio = pts + duration; + } + for (i = 0; i < c->ach; i++) { DVPacket *dpkt = &c->audio_pkt[i]; dpkt->pos = pos; dpkt->size = size; - dpkt->pts = (c->sys->height == 720) ? (c->frames & ~1) : c->frames; - dpkt->duration = 1; + dpkt->pts = pts; + dpkt->duration = duration; ppcm[i] = c->audio_buf[i]; } @@ -507,6 +526,8 @@ void ff_dv_ts_reset(DVDemuxContext *c, int64_t ts) c->frames = !c->sys ? 0 : av_rescale_q(ts, c->vst->time_base, c->sys->time_base); c->next_pts_video = ts; + c->next_pts_audio = (!c->sys || !c->ast[0]) ? AV_NOPTS_VALUE : + av_rescale_q(ts, c->vst->time_base, c->ast[0]->time_base); c->audio_pkt[0].size = c->audio_pkt[1].size = 0; c->audio_pkt[2].size = c->audio_pkt[3].size = 0; |