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Workarounded SSA payload modifications done by mkv avformat demuxer.

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This commit is contained in:
Laurent Aimar 2010-02-20 13:34:38 +01:00
parent 2f78138044
commit c26c8d737f
1 changed files with 49 additions and 6 deletions
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55
modules/demux/avformat/demux.c
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@ -84,6 +84,8 @@ struct demux_sys_t
int64_t i_pcr_inc;
int i_pcr_tk;
unsigned i_ssa_order;
int i_attachments;
input_attachment_t **attachments;
@ -100,6 +102,7 @@ static int Control( demux_t *p_demux, int i_query, va_list args );
static int IORead( void *opaque, uint8_t *buf, int buf_size );
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 );
/*****************************************************************************
@ -176,6 +179,7 @@ int OpenDemux( vlc_object_t *p_this )
p_sys->tk = NULL;
p_sys->i_pcr_tk = -1;
p_sys->i_pcr = -1;
p_sys->i_ssa_order = 0;
TAB_INIT( p_sys->i_attachments, p_sys->attachments);
p_sys->p_title = NULL;
@ -494,13 +498,18 @@ static int Demux( demux_t *p_demux )
return 1;
}
const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
if( p_stream->codec->codec_id == CODEC_ID_SSA )
{
return 0;
p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
if( !p_frame )
return 1;
}
else
{
if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
return 0;
memcpy( p_frame->p_buffer, pkt.data, pkt.size );
}
memcpy( p_frame->p_buffer, pkt.data, pkt.size );
if( pkt.flags & PKT_FLAG_KEY )
p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
@ -516,7 +525,7 @@ static int Demux( demux_t *p_demux )
VLC_TS_INVALID : (pkt.pts) * 1000000 *
p_stream->time_base.num /
p_stream->time_base.den - i_start_time + VLC_TS_0;
if( pkt.duration > 0 )
if( pkt.duration > 0 && p_frame->i_length <= 0 )
p_frame->i_length = pkt.duration * 1000000 *
p_stream->time_base.num /
p_stream->time_base.den;
@ -571,6 +580,40 @@ static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
}
}
static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
{
if( p_pkt->size <= 0 )
return NULL;
char buffer[256];
const size_t i_buffer_size = __MIN( sizeof(buffer) - 1, p_pkt->size );
memcpy( buffer, p_pkt->data, i_buffer_size );
buffer[i_buffer_size] = '\0';
/* */
int i_layer;
int h0, m0, s0, c0;
int h1, m1, s1, c1;
int i_position = 0;
if( sscanf( buffer, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d,%n", &i_layer,
&h0, &m0, &s0, &c0, &h1, &m1, &s1, &c1, &i_position ) < 9 )
return NULL;
if( i_position <= 0 || i_position >= i_buffer_size )
return NULL;
char *p;
if( asprintf( &p, "%u,%d,%.*s", i_order, i_layer, p_pkt->size - i_position, p_pkt->data + i_position ) < 0 )
return NULL;
block_t *p_frame = block_heap_Alloc( p, p, strlen(p) + 1 );
if( p_frame )
p_frame->i_length = CLOCK_FREQ * ((h1 - h1) * 3600 +
(m1-m0) * 60 +
(s1-s0) * 1) +
CLOCK_FREQ * (c1-c0) / 100;
return p_frame;
}
/*****************************************************************************
* Control:
*****************************************************************************/