int AVI_ChunkRead( stream_t *s, avi_chunk_t *p_chk, avi_chunk_t *p_father )
{
int i_index;
if( !p_chk )
{
msg_Warn( (vlc_object_t*)s, "cannot read null chunk" );
return VLC_EGENERIC;
}
if( AVI_ChunkReadCommon( s, p_chk ) )
{
msg_Warn( (vlc_object_t*)s, "cannot read one chunk" );
return VLC_EGENERIC;
}
if( p_chk->common.i_chunk_fourcc == VLC_FOURCC( 0, 0, 0, 0 ) )
{
msg_Warn( (vlc_object_t*)s, "found null fourcc chunk (corrupted file?)" );
return AVI_ZERO_FOURCC;
}
p_chk->common.p_father = p_father;
i_index = AVI_ChunkFunctionFind( p_chk->common.i_chunk_fourcc );
if( AVI_Chunk_Function[i_index].AVI_ChunkRead_function )
{
int i_return = AVI_Chunk_Function[i_index].AVI_ChunkRead_function( s, p_chk );
if ( i_return == AVI_STRD_ZERO_CHUNK || i_return == AVI_ZERO_FOURCC )
{
if ( !p_father ) return VLC_EGENERIC;
return AVI_NextChunk( s, p_father );
}
return i_return;
}
else if( ( ((char*)&p_chk->common.i_chunk_fourcc)[0] == 'i' &&
((char*)&p_chk->common.i_chunk_fourcc)[1] == 'x' ) ||
( ((char*)&p_chk->common.i_chunk_fourcc)[2] == 'i' &&
((char*)&p_chk->common.i_chunk_fourcc)[3] == 'x' ) )
{
p_chk->common.i_chunk_fourcc = AVIFOURCC_indx;
return AVI_ChunkRead_indx( s, p_chk );
}
msg_Warn( (vlc_object_t*)s, "unknown chunk: %4.4s (not loaded)",
(char*)&p_chk->common.i_chunk_fourcc );
return AVI_NextChunk( s, p_chk );
}
static int AVI_ChunkRead_nothing( stream_t *s, avi_chunk_t *p_chk )
{
return AVI_NextChunk( s, p_chk );
}
/****************************************************************************
*
* Functions to read chunks
*
****************************************************************************/
static int AVI_ChunkRead_list( stream_t *s, avi_chunk_t *p_container )
{
avi_chunk_t *p_chk;
const uint8_t *p_peek;
bool b_seekable;
if( p_container->common.i_chunk_size > 0 && p_container->common.i_chunk_size < 8 )
{
/* empty box */
msg_Warn( (vlc_object_t*)s, "empty list chunk" );
return VLC_EGENERIC;
}
if( stream_Peek( s, &p_peek, 12 ) < 12 )
{
msg_Warn( (vlc_object_t*)s, "cannot peek while reading list chunk" );
return VLC_EGENERIC;
}
stream_Control( s, STREAM_CAN_FASTSEEK, &b_seekable );
p_container->list.i_type = GetFOURCC( p_peek + 8 );
/* XXX fixed for on2 hack */
if( p_container->common.i_chunk_fourcc == AVIFOURCC_ON2 && p_container->list.i_type == AVIFOURCC_ON2f )
{
p_container->common.i_chunk_fourcc = AVIFOURCC_RIFF;
p_container->list.i_type = AVIFOURCC_AVI;
}
if( p_container->common.i_chunk_fourcc == AVIFOURCC_LIST &&
p_container->list.i_type == AVIFOURCC_movi )
{
msg_Dbg( (vlc_object_t*)s, "skipping movi chunk" );
if( b_seekable )
{
return AVI_NextChunk( s, p_container );
}
return VLC_SUCCESS; /* point at begining of LIST-movi */
}
if( stream_Read( s, NULL, 12 ) != 12 )
{
msg_Warn( (vlc_object_t*)s, "cannot enter chunk" );
return VLC_EGENERIC;
}
#ifdef AVI_DEBUG
msg_Dbg( (vlc_object_t*)s,
"found LIST chunk: \'%4.4s\'",
(char*)&p_container->list.i_type );
#endif
msg_Dbg( (vlc_object_t*)s, "<list \'%4.4s\'>", (char*)&p_container->list.i_type );
for( ; ; )
{
p_chk = malloc( sizeof( avi_chunk_t ) );
memset( p_chk, 0, sizeof( avi_chunk_t ) );
if( !p_container->common.p_first )
{
p_container->common.p_first = p_chk;
}
else
{
p_container->common.p_last->common.p_next = p_chk;
}
p_container->common.p_last = p_chk;
if( AVI_ChunkRead( s, p_chk, p_container ) )
{
break;
}
if( p_chk->common.p_father->common.i_chunk_size > 0 &&
( stream_Tell( s ) >
(off_t)p_chk->common.p_father->common.i_chunk_pos +
(off_t)__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
{
break;
}
/* If we can't seek then stop when we 've found LIST-movi */
if( p_chk->common.i_chunk_fourcc == AVIFOURCC_LIST &&
p_chk->list.i_type == AVIFOURCC_movi &&
( !b_seekable || p_chk->common.i_chunk_size == 0 ) )
{
break;
}
}
msg_Dbg( (vlc_object_t*)s, "</list \'%4.4s\'>", (char*)&p_container->list.i_type );
return VLC_SUCCESS;
}