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vlc-2-2
Commit e7192dbf authored by Laurent Aimar's avatar Laurent Aimar
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Clean up a bit merge functions in deinterlace. 

Small potential overread/overwrite(/ineficiency are fixed.
parent 4f93b728
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Showing with 38 additions and 85 deletions
modules/video_filter/deinterlace/merge.c
View file @ e7192dbf
......@@ -48,65 +48,34 @@
void Merge8BitGeneric( void *_p_dest, const void *_p_s1,
const void *_p_s2, size_t i_bytes )
{
uint8_t* p_dest = (uint8_t*)_p_dest;
const uint8_t *p_s1 = (const uint8_t *)_p_s1;
const uint8_t *p_s2 = (const uint8_t *)_p_s2;
uint8_t* p_end = p_dest + i_bytes - 8;
uint8_t *p_dest = _p_dest;
const uint8_t *p_s1 = _p_s1;
const uint8_t *p_s2 = _p_s2;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
p_end += 8;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
for( ; i_bytes > 0; i_bytes-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
void Merge16BitGeneric( void *_p_dest, const void *_p_s1,
const void *_p_s2, size_t i_bytes )
{
uint16_t* p_dest = (uint16_t*)_p_dest;
const uint16_t *p_s1 = (const uint16_t *)_p_s1;
const uint16_t *p_s2 = (const uint16_t *)_p_s2;
uint16_t* p_end = p_dest + (i_bytes/2) - 4;
while( p_dest < p_end )
{
*p_dest++ = ( (uint32_t)(*p_s1++) + (uint32_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint32_t)(*p_s1++) + (uint32_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint32_t)(*p_s1++) + (uint32_t)(*p_s2++) ) >> 1;
*p_dest++ = ( (uint32_t)(*p_s1++) + (uint32_t)(*p_s2++) ) >> 1;
}
p_end += 4;
while( p_dest < p_end )
{
*p_dest++ = ( (uint32_t)(*p_s1++) + (uint32_t)(*p_s2++) ) >> 1;
}
uint16_t *p_dest = _p_dest;
const uint16_t *p_s1 = _p_s1;
const uint16_t *p_s2 = _p_s2;
for( size_t i_words = i_bytes / 2; i_words > 0; i_words-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
#if defined(CAN_COMPILE_MMXEXT)
void MergeMMXEXT( void *_p_dest, const void *_p_s1, const void *_p_s2,
size_t i_bytes )
{
uint8_t* p_dest = (uint8_t*)_p_dest;
const uint8_t *p_s1 = (const uint8_t *)_p_s1;
const uint8_t *p_s2 = (const uint8_t *)_p_s2;
uint8_t* p_end = p_dest + i_bytes - 8;
while( p_dest < p_end )
uint8_t *p_dest = _p_dest;
const uint8_t *p_s1 = _p_s1;
const uint8_t *p_s2 = _p_s2;
for( ; i_bytes >= 8; i_bytes -= 8 )
{
__asm__ __volatile__( "movq %2,%%mm1;"
"pavgb %1, %%mm1;"
......@@ -118,12 +87,8 @@ void MergeMMXEXT( void *_p_dest, const void *_p_s1, const void *_p_s2,
p_s2 += 8;
}
p_end += 8;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
for( ; i_bytes > 0; i_bytes-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
#endif
......@@ -131,11 +96,11 @@ void MergeMMXEXT( void *_p_dest, const void *_p_s1, const void *_p_s2,
void Merge3DNow( void *_p_dest, const void *_p_s1, const void *_p_s2,
size_t i_bytes )
{
uint8_t* p_dest = (uint8_t*)_p_dest;
const uint8_t *p_s1 = (const uint8_t *)_p_s1;
const uint8_t *p_s2 = (const uint8_t *)_p_s2;
uint8_t* p_end = p_dest + i_bytes - 8;
while( p_dest < p_end )
uint8_t *p_dest = _p_dest;
const uint8_t *p_s1 = _p_s1;
const uint8_t *p_s2 = _p_s2;
for( ; i_bytes >= 8; i_bytes -= 8 )
{
__asm__ __volatile__( "movq %2,%%mm1;"
"pavgusb %1, %%mm1;"
......@@ -147,12 +112,8 @@ void Merge3DNow( void *_p_dest, const void *_p_s1, const void *_p_s2,
p_s2 += 8;
}
p_end += 8;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
for( ; i_bytes > 0; i_bytes-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
#endif
......@@ -160,16 +121,14 @@ void Merge3DNow( void *_p_dest, const void *_p_s1, const void *_p_s2,
void MergeSSE2( void *_p_dest, const void *_p_s1, const void *_p_s2,
size_t i_bytes )
{
uint8_t* p_dest = (uint8_t*)_p_dest;
const uint8_t *p_s1 = (const uint8_t *)_p_s1;
const uint8_t *p_s2 = (const uint8_t *)_p_s2;
uint8_t* p_end;
while( (uintptr_t)p_s1 % 16 )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
p_end = p_dest + i_bytes - 16;
while( p_dest < p_end )
uint8_t *p_dest = _p_dest;
const uint8_t *p_s1 = _p_s1;
const uint8_t *p_s2 = _p_s2;
for( ; i_bytes > 0 && ((uintptr_t)p_s1 & 15); i_bytes-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
for( ; i_bytes >= 16; i_bytes -= 16 )
{
__asm__ __volatile__( "movdqu %2,%%xmm1;"
"pavgb %1, %%xmm1;"
......@@ -181,12 +140,8 @@ void MergeSSE2( void *_p_dest, const void *_p_s1, const void *_p_s2,
p_s2 += 16;
}
p_end += 16;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
for( ; i_bytes > 0; i_bytes-- )
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
#endif
......@@ -194,9 +149,9 @@ void MergeSSE2( void *_p_dest, const void *_p_s1, const void *_p_s2,
void MergeAltivec( void *_p_dest, const void *_p_s1,
const void *_p_s2, size_t i_bytes )
{
uint8_t *p_dest = (uint8_t *)_p_dest;
uint8_t *p_s1 = (uint8_t *)_p_s1;
uint8_t *p_s2 = (uint8_t *)_p_s2;
uint8_t *p_dest = _p_dest;
const uint8_t *p_s1 = _p_s1;
const uint8_t *p_s2 = _p_s2;
uint8_t *p_end = p_dest + i_bytes - 15;
/* Use C until the first 16-bytes aligned destination pixel */
......@@ -254,9 +209,7 @@ void MergeAltivec( void *_p_dest, const void *_p_s1,
p_end += 15;
while( p_dest < p_end )
{
*p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
}
*p_dest++ = ( *p_s1++ + *p_s2++ ) >> 1;
}
#endif
......
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