/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
AVPacket pkt;
block_t *p_frame;
vlc_tick_t i_start_time;
/* Read a frame */
int i_av_ret = av_read_frame( p_sys->ic, &pkt );
if( i_av_ret )
{
/* Avoid EOF if av_read_frame returns AVERROR(EAGAIN) */
if( i_av_ret == AVERROR(EAGAIN) )
return 1;
return 0;
}
if( pkt.stream_index < 0 || (unsigned) pkt.stream_index >= p_sys->i_tracks )
{
av_packet_unref( &pkt );
return 1;
}
struct avformat_track_s *p_track = &p_sys->tracks[pkt.stream_index];
const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
if( p_stream->time_base.den <= 0 )
{
msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index );
av_packet_unref( &pkt );
return 1;
}
if( p_stream->codecpar->codec_id == AV_CODEC_ID_SSA )
{
p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
if( !p_frame )
{
av_packet_unref( &pkt );
return 1;
}
}
else if( p_stream->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE )
{
if( ( p_frame = block_Alloc( pkt.size + 3 ) ) == NULL )
{
av_packet_unref( &pkt );
return 0;
}
p_frame->p_buffer[0] = 0x20;
p_frame->p_buffer[1] = 0x00;
memcpy( &p_frame->p_buffer[2], pkt.data, pkt.size );
p_frame->p_buffer[p_frame->i_buffer - 1] = 0x3f;
}
else
{
if( ( p_frame = block_Alloc( pkt.size ) ) == NULL )
{
av_packet_unref( &pkt );
return 0;
}
memcpy( p_frame->p_buffer, pkt.data, pkt.size );
}
if( pkt.flags & AV_PKT_FLAG_KEY )
p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
/* Used to avoid timestamps overlow */
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
{
i_start_time = vlc_tick_from_frac(p_sys->ic->start_time, AV_TIME_BASE);
}
else
i_start_time = 0;
if( pkt.dts == (int64_t)AV_NOPTS_VALUE )
p_frame->i_dts = VLC_TICK_INVALID;
else
{
p_frame->i_dts = vlc_tick_from_frac( pkt.dts * p_stream->time_base.num, p_stream->time_base.den )
- i_start_time + VLC_TICK_0;
}
if( pkt.pts == (int64_t)AV_NOPTS_VALUE )
p_frame->i_pts = VLC_TICK_INVALID;
else
{
p_frame->i_pts = vlc_tick_from_frac( pkt.pts * p_stream->time_base.num, p_stream->time_base.den )
- i_start_time + VLC_TICK_0;
}
if( pkt.duration > 0 && p_frame->i_length <= 0 )
p_frame->i_length = vlc_tick_from_samples(pkt.duration *
p_stream->time_base.num,
p_stream->time_base.den );
/* Add here notoriously bugged file formats/samples */
if( !strcmp( p_sys->fmt->name, "flv" ) )
{
/* FLV and video PTS */
if( p_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
pkt.dts != (int64_t)AV_NOPTS_VALUE && pkt.dts == pkt.pts )
p_frame->i_pts = VLC_TICK_INVALID;
/* Handle broken dts/pts increase with AAC. Duration is correct.
* sky_the80s_aacplus.flv #8195 */
if( p_stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
p_stream->codecpar->codec_id == AV_CODEC_ID_AAC )
{
if( p_track->i_pcr != VLC_TICK_INVALID &&
p_track->i_pcr + p_frame->i_length > p_frame->i_dts )
{
p_frame->i_dts = p_frame->i_pts = p_track->i_pcr + p_frame->i_length;
}
}
}
#ifdef AVFORMAT_DEBUG
msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
#endif
if( p_frame->i_dts != VLC_TICK_INVALID && p_track->p_es != NULL )
p_track->i_pcr = p_frame->i_dts;
vlc_tick_t i_ts_max = INT64_MIN;
for( unsigned i = 0; i < p_sys->i_tracks; i++ )
{
if( p_sys->tracks[i].p_es != NULL )
i_ts_max = __MAX( i_ts_max, p_sys->tracks[i].i_pcr );
}
vlc_tick_t i_ts_min = INT64_MAX;
for( unsigned i = 0; i < p_sys->i_tracks; i++ )
{
if( p_sys->tracks[i].p_es != NULL &&
p_sys->tracks[i].i_pcr != VLC_TICK_INVALID &&
p_sys->tracks[i].i_pcr + VLC_TICK_FROM_SEC(10)>= i_ts_max )
i_ts_min = __MIN( i_ts_min, p_sys->tracks[i].i_pcr );
}
if( i_ts_min >= p_sys->i_pcr && likely(i_ts_min != INT64_MAX) )
{
p_sys->i_pcr = i_ts_min;
es_out_SetPCR( p_demux->out, p_sys->i_pcr );
UpdateSeekPoint( p_demux, p_sys->i_pcr );
}
if( p_track->p_es != NULL )
es_out_Send( p_demux->out, p_track->p_es, p_frame );
else
block_Release( p_frame );
av_packet_unref( &pkt );
return 1;
}
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
AVPacket pkt;
block_t *p_frame;
int64_t i_start_time;
/* Read a frame */
int i_av_ret = av_read_frame( p_sys->ic, &pkt );
if( i_av_ret )
{
/* Avoid EOF if av_read_frame returns AVERROR(EAGAIN) */
if( i_av_ret == AVERROR(EAGAIN) )
return 1;
return 0;
}
if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
{
av_packet_unref( &pkt );
return 1;
}
const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
if( p_stream->time_base.den <= 0 )
{
msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index );
av_packet_unref( &pkt );
return 1;
}
if( p_stream->codecpar->codec_id == AV_CODEC_ID_SSA )
{
p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
if( !p_frame )
{
av_packet_unref( &pkt );
return 1;
}
}
else
{
if( ( p_frame = block_Alloc( pkt.size ) ) == NULL )
{
av_packet_unref( &pkt );
return 0;
}
memcpy( p_frame->p_buffer, pkt.data, pkt.size );
}
if( pkt.flags & AV_PKT_FLAG_KEY )
p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
/* Used to avoid timestamps overlow */
lldiv_t q;
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
{
q = lldiv( p_sys->ic->start_time, AV_TIME_BASE);
i_start_time = q.quot * CLOCK_FREQ + q.rem * CLOCK_FREQ / AV_TIME_BASE;
}
else
i_start_time = 0;
if( pkt.dts == (int64_t)AV_NOPTS_VALUE )
p_frame->i_dts = VLC_TS_INVALID;
else
{
q = lldiv( pkt.dts, p_stream->time_base.den );
p_frame->i_dts = q.quot * CLOCK_FREQ *
p_stream->time_base.num + q.rem * CLOCK_FREQ *
p_stream->time_base.num /
p_stream->time_base.den - i_start_time + VLC_TS_0;
}
if( pkt.pts == (int64_t)AV_NOPTS_VALUE )
p_frame->i_pts = VLC_TS_INVALID;
else
{
q = lldiv( pkt.pts, p_stream->time_base.den );
p_frame->i_pts = q.quot * CLOCK_FREQ *
p_stream->time_base.num + q.rem * CLOCK_FREQ *
p_stream->time_base.num /
p_stream->time_base.den - i_start_time + VLC_TS_0;
}
if( pkt.duration > 0 && p_frame->i_length <= 0 )
p_frame->i_length = pkt.duration * CLOCK_FREQ *
p_stream->time_base.num /
p_stream->time_base.den;
/* Add here notoriously bugged file formats/samples */
if( !strcmp( p_sys->fmt->name, "flv" ) )
{
/* FLV and video PTS */
if( p_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
pkt.dts != (int64_t)AV_NOPTS_VALUE && pkt.dts == pkt.pts )
p_frame->i_pts = VLC_TS_INVALID;
/* Handle broken dts/pts increase with AAC. Duration is correct.
* sky_the80s_aacplus.flv #8195 */
if( p_stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
p_stream->codecpar->codec_id == AV_CODEC_ID_AAC )
{
if( p_sys->tk_pcr[pkt.stream_index] != VLC_TS_INVALID &&
p_sys->tk_pcr[pkt.stream_index] + p_frame->i_length > p_frame->i_dts )
{
p_frame->i_dts = p_frame->i_pts = p_sys->tk_pcr[pkt.stream_index] + p_frame->i_length;
}
}
}
#ifdef AVFORMAT_DEBUG
msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
#endif
if( p_frame->i_dts > VLC_TS_INVALID )
p_sys->tk_pcr[pkt.stream_index] = p_frame->i_dts;
int64_t i_ts_max = INT64_MIN;
for( int i = 0; i < p_sys->i_tk; i++ )
i_ts_max = __MAX( i_ts_max, p_sys->tk_pcr[i] );
int64_t i_ts_min = INT64_MAX;
for( int i = 0; i < p_sys->i_tk; i++ )
{
if( p_sys->tk_pcr[i] > VLC_TS_INVALID && p_sys->tk_pcr[i] + 10 * CLOCK_FREQ >= i_ts_max )
i_ts_min = __MIN( i_ts_min, p_sys->tk_pcr[i] );
}
if( i_ts_min >= p_sys->i_pcr )
{
p_sys->i_pcr = i_ts_min;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
UpdateSeekPoint( p_demux, p_sys->i_pcr );
}
if( p_sys->tk[pkt.stream_index] != NULL )
es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
else
block_Release( p_frame );
av_packet_unref( &pkt );
return 1;
}
