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Commit 2ee48753 authored by Laurent Aimar's avatar Laurent Aimar
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Improved time managment and seeking in our avformat wrapper.

parent ce57c84c
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Showing with 72 additions and 46 deletions
modules/demux/avformat/demux.c
View file @ 2ee48753
......@@ -71,9 +71,8 @@ struct demux_sys_t
int i_tk;
es_out_id_t **tk;
int64_t i_pcr;
int i_pcr_tk;
int64_t *tk_pcr;
int64_t i_pcr;
unsigned i_ssa_order;
......@@ -95,6 +94,7 @@ static int64_t IOSeek( void *opaque, int64_t offset, int whence );
static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order );
static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
static void ResetTime( demux_t *p_demux, int64_t i_time );
/*****************************************************************************
* Open
......@@ -190,8 +190,7 @@ int OpenDemux( vlc_object_t *p_this )
p_sys->fmt = fmt;
p_sys->i_tk = 0;
p_sys->tk = NULL;
p_sys->i_pcr_tk = -1;
p_sys->i_pcr = -1;
p_sys->tk_pcr = NULL;
p_sys->i_ssa_order = 0;
TAB_INIT( p_sys->i_attachments, p_sys->attachments);
p_sys->p_title = NULL;
......@@ -465,6 +464,8 @@ int OpenDemux( vlc_object_t *p_this )
TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
}
}
p_sys->tk_pcr = calloc( p_sys->i_tk, sizeof(*p_sys->tk_pcr) );
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
......@@ -496,6 +497,7 @@ int OpenDemux( vlc_object_t *p_this )
TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
}
ResetTime( p_demux, 0 );
return VLC_SUCCESS;
}
......@@ -508,6 +510,7 @@ void CloseDemux( vlc_object_t *p_this )
demux_sys_t *p_sys = p_demux->p_sys;
FREENULL( p_sys->tk );
free( p_sys->tk_pcr );
if( p_sys->ic ) av_close_input_stream( p_sys->ic );
......@@ -598,19 +601,28 @@ static int Demux( demux_t *p_demux )
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;
if( p_frame->i_dts > VLC_TS_INVALID &&
( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
{
p_sys->i_pcr_tk = pkt.stream_index;
p_sys->i_pcr = 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] );
es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
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 );
}
es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
UpdateSeekPoint( p_demux, p_sys->i_pcr);
av_free_packet( &pkt );
return 1;
}
......@@ -637,6 +649,26 @@ static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
}
}
static void ResetTime( demux_t *p_demux, int64_t i_time )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->ic->start_time == (int64_t)AV_NOPTS_VALUE || i_time < 0 )
i_time = VLC_TS_INVALID;
else if( i_time == 0 )
i_time = 1;
p_sys->i_pcr = i_time;
for( int i = 0; i < p_sys->i_tk; i++ )
p_sys->tk_pcr[i] = i_time;
if( i_time > VLC_TS_INVALID )
{
es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_time );
UpdateSeekPoint( p_demux, i_time );
}
}
static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
{
if( p_pkt->size <= 0 )
......@@ -677,6 +709,7 @@ static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
static int Control( demux_t *p_demux, int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
const int64_t i_start_time = p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ? p_sys->ic->start_time : 0;
double f, *pf;
int64_t i64, *pi64;
......@@ -700,31 +733,27 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
case DEMUX_SET_POSITION:
f = (double) va_arg( args, double );
if( p_sys->i_pcr > 0 )
{
i64 = p_sys->ic->duration * f;
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
i64 += p_sys->ic->start_time;
i64 = p_sys->ic->duration * f + i_start_time;
msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
/* If we have a duration, we prefer to seek by time
but if we don't, or if the seek fails, try BYTE seeking */
if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
(av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
{
int64_t i_size = stream_Size( p_demux->s );
i64 = (i_size * f);
/* If we have a duration, we prefer to seek by time
but if we don't, or if the seek fails, try BYTE seeking */
if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
(av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0) )
{
int64_t i_size = stream_Size( p_demux->s );
i64 = (i_size * f);
msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
return VLC_EGENERIC;
}
else
{
UpdateSeekPoint( p_demux, i64 );
}
p_sys->i_pcr = -1; /* Invalidate time display */
msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
return VLC_EGENERIC;
ResetTime( p_demux, -1 );
}
else
{
ResetTime( p_demux, i64 - i_start_time );
}
return VLC_SUCCESS;
......@@ -742,20 +771,19 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
return VLC_SUCCESS;
case DEMUX_SET_TIME:
{
i64 = (int64_t)va_arg( args, int64_t );
i64 = i64 *AV_TIME_BASE / 1000000;
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
i64 += p_sys->ic->start_time;
i64 = i64 *AV_TIME_BASE / 1000000 + i_start_time;
msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 )
{
return VLC_EGENERIC;
}
p_sys->i_pcr = -1; /* Invalidate time display */
UpdateSeekPoint( p_demux, i64 );
ResetTime( p_demux, i64 - i_start_time );
return VLC_SUCCESS;
}
case DEMUX_HAS_UNSUPPORTED_META:
{
......@@ -835,18 +863,16 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
if( !p_sys->p_title )
return VLC_EGENERIC;
i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
i64 += p_sys->ic->start_time;
i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *
AV_TIME_BASE / 1000000 + i_start_time;
msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 )
{
return VLC_EGENERIC;
}
p_sys->i_pcr = -1; /* Invalidate time display */
UpdateSeekPoint( p_demux, i64 );
ResetTime( p_demux, i64 - i_start_time );
return VLC_SUCCESS;
}
......
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