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Optimize demux_ty_FindESHeader 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24503 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2007-09-14 20:37:30 +00:00
parent 9d885bbbe8
commit 99ef8adf6f
1 changed files with 9 additions and 8 deletions
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17
libmpdemux/demux_ty.c
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@ -356,14 +356,15 @@ static void demux_ty_CopyToDemuxPacket( int type, TiVoInfo *tivo, demux_stream_t
static int demux_ty_FindESHeader( unsigned char *header,
unsigned char *buffer, int bufferSize )
{
int count;
for( count = 0 ; count + 3 < bufferSize ; count++ )
{
if ( buffer[ count + 0 ] == header[ 0 ] &&
buffer[ count + 1 ] == header[ 1 ] &&
buffer[ count + 2 ] == header[ 2 ] &&
buffer[ count + 3 ] == header[ 3 ] )
return count;
uint32_t search = AV_RB32(header);
uint32_t found = -1;
uint8_t *p = buffer;
uint8_t *end = p + bufferSize;
while (p < end) {
found <<= 8;
found |= *p++;
if (found == search)
return p - buffer - 4;
}
return -1;
}