Commit a692bf04 authored by François Cartegnie's avatar François Cartegnie 🤞

demux: libavi: use helpers for correct chunk size checks

parent eaf1c023
......@@ -44,6 +44,16 @@ static vlc_fourcc_t GetFOURCC( const uint8_t *p_buff )
return VLC_FOURCC( p_buff[0], p_buff[1], p_buff[2], p_buff[3] );
}
static uint64_t AVI_ChunkSize( const avi_chunk_t *p_ck )
{
return __EVEN(p_ck->common.i_chunk_size) + 8;
}
static uint64_t AVI_ChunkEnd( const avi_chunk_t *p_ck )
{
return p_ck->common.i_chunk_pos + AVI_ChunkSize( p_ck );
}
/****************************************************************************
*
* Basics functions to manipulates chunks
......@@ -93,18 +103,14 @@ static int AVI_NextChunk( stream_t *s, avi_chunk_t *p_chk )
if( p_chk->common.p_father )
{
if( p_chk->common.p_father->common.i_chunk_pos +
__EVEN( p_chk->common.p_father->common.i_chunk_size ) + 8 <
p_chk->common.i_chunk_pos +
__EVEN( p_chk->common.i_chunk_size ) + 8 )
if( AVI_ChunkEnd( p_chk->common.p_father ) < AVI_ChunkEnd( p_chk ) )
{
return VLC_EGENERIC;
}
}
bool b_seekable = false;
uint64_t i_offset = p_chk->common.i_chunk_pos +
__EVEN( p_chk->common.i_chunk_size ) + 8;
const uint64_t i_offset = AVI_ChunkEnd( p_chk );
if ( !vlc_stream_Control(s, STREAM_CAN_SEEK, &b_seekable) && b_seekable )
{
return vlc_stream_Seek( s, i_offset );
......@@ -195,9 +201,7 @@ static int AVI_ChunkRead_list( stream_t *s, avi_chunk_t *p_container )
break;
}
if( p_chk->common.p_father->common.i_chunk_size > 0 &&
( vlc_stream_Tell( s ) >
p_chk->common.p_father->common.i_chunk_pos +
__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
vlc_stream_Tell( s ) >= AVI_ChunkEnd( p_chk->common.p_father ) )
{
break;
}
......@@ -225,7 +229,7 @@ int AVI_ChunkFetchIndexes( stream_t *s, avi_chunk_t *p_riff )
return VLC_EGENERIC;
avi_chunk_t *p_chk;
uint64_t i_indexpos = 8 + p_movi->common.i_chunk_pos + p_movi->common.i_chunk_size;
const uint64_t i_indexpos = AVI_ChunkEnd( p_movi );
bool b_seekable = false;
int i_ret = VLC_SUCCESS;
......
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