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swscale/swscale: remove useless code 

Signed-off-by: Ruiling Song <ruiling.song@intel.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Ruiling Song 2020-04-01 15:32:15 +08:00 committed by Michael Niedermayer
parent 9f567c431e
commit 4700f7d6fc
3 changed files with 3 additions and 21 deletions
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16
libswscale/swscale.c
View File

@ -266,8 +266,6 @@ static int swscale(SwsContext *c, const uint8_t *src[],
/* vars which will change and which we need to store back in the context */
int dstY = c->dstY;
int lumBufIndex = c->lumBufIndex;
int chrBufIndex = c->chrBufIndex;
int lastInLumBuf = c->lastInLumBuf;
int lastInChrBuf = c->lastInChrBuf;
@ -336,8 +334,6 @@ static int swscale(SwsContext *c, const uint8_t *src[],
* will not get executed. This is not really intended but works
* currently, so people might do it. */
if (srcSliceY == 0) {
lumBufIndex = -1;
chrBufIndex = -1;
dstY = 0;
lastInLumBuf = -1;
lastInChrBuf = -1;
@ -461,7 +457,6 @@ static int swscale(SwsContext *c, const uint8_t *src[],
desc[i].process(c, &desc[i], firstPosY, lastPosY - firstPosY + 1);
}
lumBufIndex += lastLumSrcY - lastInLumBuf;
lastInLumBuf = lastLumSrcY;
if (cPosY < lastChrSrcY + 1) {
@ -469,20 +464,13 @@ static int swscale(SwsContext *c, const uint8_t *src[],
desc[i].process(c, &desc[i], firstCPosY, lastCPosY - firstCPosY + 1);
}
chrBufIndex += lastChrSrcY - lastInChrBuf;
lastInChrBuf = lastChrSrcY;
// wrap buf index around to stay inside the ring buffer
if (lumBufIndex >= vLumFilterSize)
lumBufIndex -= vLumFilterSize;
if (chrBufIndex >= vChrFilterSize)
chrBufIndex -= vChrFilterSize;
if (!enough_lines)
break; // we can't output a dstY line so let's try with the next slice
#if HAVE_MMX_INLINE
ff_updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,
lastInLumBuf, lastInChrBuf);
ff_updateMMXDitherTables(c, dstY);
#endif
if (should_dither) {
c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];
@ -524,8 +512,6 @@ static int swscale(SwsContext *c, const uint8_t *src[],
/* store changed local vars back in the context */
c->dstY = dstY;
c->lumBufIndex = lumBufIndex;
c->chrBufIndex = chrBufIndex;
c->lastInLumBuf = lastInLumBuf;
c->lastInChrBuf = lastInChrBuf;

5
libswscale/swscale_internal.h
View File

@ -350,8 +350,6 @@ typedef struct SwsContext {
//@{
int lastInLumBuf; ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
int lastInChrBuf; ///< Last scaled horizontal chroma line from source in the ring buffer.
int lumBufIndex; ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
int chrBufIndex; ///< Index in ring buffer of the last scaled horizontal chroma line from source.
//@}
uint8_t *formatConvBuffer;
@ -635,8 +633,7 @@ int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4],
int brightness, int contrast, int saturation);
void ff_updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
int lastInLumBuf, int lastInChrBuf);
void ff_updateMMXDitherTables(SwsContext *c, int dstY);
av_cold void ff_sws_init_range_convert(SwsContext *c);

3
libswscale/x86/swscale.c
View File

@ -79,8 +79,7 @@ DECLARE_ASM_ALIGNED(8, const uint64_t, ff_w1111) = 0x0001000100010001ULL;
#include "swscale_template.c"
#endif
void ff_updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
int lastInLumBuf, int lastInChrBuf)
void ff_updateMMXDitherTables(SwsContext *c, int dstY)
{
const int dstH= c->dstH;
const int flags= c->flags;