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Remove duplicate horizontal scaling when there aren't enough lines in a slice 

to output the dstY line.

Originally committed as revision 29450 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Ramiro Polla 2009-07-28 05:13:36 +00:00
parent 571d9587cf
commit fb91df397a
1 changed files with 15 additions and 52 deletions
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67
libswscale/swscale_template.c
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@ -2700,8 +2700,9 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
const int firstLumSrcY= vLumFilterPos[dstY]; //First line needed as input
const int firstChrSrcY= vChrFilterPos[chrDstY]; //First line needed as input
const int lastLumSrcY= firstLumSrcY + vLumFilterSize -1; // Last line needed as input
const int lastChrSrcY= firstChrSrcY + vChrFilterSize -1; // Last line needed as input
int lastLumSrcY= firstLumSrcY + vLumFilterSize -1; // Last line needed as input
int lastChrSrcY= firstChrSrcY + vChrFilterSize -1; // Last line needed as input
int enough_lines;
//printf("dstY:%d dstH:%d firstLumSrcY:%d lastInLumBuf:%d vLumBufSize: %d vChrBufSize: %d slice: %d %d vLumFilterSize: %d firstChrSrcY: %d vChrFilterSize: %d c->chrSrcVSubSample: %d\n",
// dstY, dstH, firstLumSrcY, lastInLumBuf, vLumBufSize, vChrBufSize, srcSliceY, srcSliceH, vLumFilterSize, firstChrSrcY, vChrFilterSize, c->chrSrcVSubSample);
@ -2713,8 +2714,17 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
assert(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
// Do we have enough lines in this slice to output the dstY line
if (lastLumSrcY < srcSliceY + srcSliceH && lastChrSrcY < -((-srcSliceY - srcSliceH)>>c->chrSrcVSubSample))
{
enough_lines = lastLumSrcY < srcSliceY + srcSliceH && lastChrSrcY < -((-srcSliceY - srcSliceH)>>c->chrSrcVSubSample);
if (!enough_lines) {
lastLumSrcY = srcSliceY + srcSliceH - 1;
lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
}
/* printf("%d %d Last:%d %d LastInBuf:%d %d Index:%d %d Y:%d FSize: %d %d BSize: %d %d\n",
firstChrSrcY,firstLumSrcY,lastChrSrcY,lastLumSrcY,
lastInChrBuf,lastInLumBuf,chrBufIndex,lumBufIndex,dstY,vChrFilterSize,vLumFilterSize,
vChrBufSize, vLumBufSize);*/
//Do horizontal scaling
while(lastInLumBuf < lastLumSrcY)
{
@ -2757,55 +2767,8 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
//wrap buf index around to stay inside the ring buffer
if (lumBufIndex >= vLumBufSize) lumBufIndex-= vLumBufSize;
if (chrBufIndex >= vChrBufSize) chrBufIndex-= vChrBufSize;
}
else // not enough lines left in this slice -> load the rest in the buffer
{
/* printf("%d %d Last:%d %d LastInBuf:%d %d Index:%d %d Y:%d FSize: %d %d BSize: %d %d\n",
firstChrSrcY,firstLumSrcY,lastChrSrcY,lastLumSrcY,
lastInChrBuf,lastInLumBuf,chrBufIndex,lumBufIndex,dstY,vChrFilterSize,vLumFilterSize,
vChrBufSize, vLumBufSize);*/
//Do horizontal scaling
while(lastInLumBuf+1 < srcSliceY + srcSliceH)
{
uint8_t *src1= src[0]+(lastInLumBuf + 1 - srcSliceY)*srcStride[0];
uint8_t *src2= src[3]+(lastInLumBuf + 1 - srcSliceY)*srcStride[3];
lumBufIndex++;
assert(lumBufIndex < 2*vLumBufSize);
assert(lastInLumBuf + 1 - srcSliceY < srcSliceH);
assert(lastInLumBuf + 1 - srcSliceY >= 0);
RENAME(hyscale)(c, lumPixBuf[ lumBufIndex ], dstW, src1, srcW, lumXInc,
flags, hLumFilter, hLumFilterPos, hLumFilterSize,
c->srcFormat, formatConvBuffer,
pal, 0);
if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
RENAME(hyscale)(c, alpPixBuf[ lumBufIndex ], dstW, src2, srcW, lumXInc,
flags, hLumFilter, hLumFilterPos, hLumFilterSize,
c->srcFormat, formatConvBuffer,
pal, 1);
lastInLumBuf++;
}
while(lastInChrBuf+1 < (chrSrcSliceY + chrSrcSliceH))
{
uint8_t *src1= src[1]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[1];
uint8_t *src2= src[2]+(lastInChrBuf + 1 - chrSrcSliceY)*srcStride[2];
chrBufIndex++;
assert(chrBufIndex < 2*vChrBufSize);
assert(lastInChrBuf + 1 - chrSrcSliceY < chrSrcSliceH);
assert(lastInChrBuf + 1 - chrSrcSliceY >= 0);
if (!(isGray(srcFormat) || isGray(dstFormat)))
RENAME(hcscale)(c, chrPixBuf[ chrBufIndex ], chrDstW, src1, src2, chrSrcW, chrXInc,
flags, hChrFilter, hChrFilterPos, hChrFilterSize,
c->srcFormat, formatConvBuffer,
pal);
lastInChrBuf++;
}
//wrap buf index around to stay inside the ring buffer
if (lumBufIndex >= vLumBufSize) lumBufIndex-= vLumBufSize;
if (chrBufIndex >= vChrBufSize) chrBufIndex-= vChrBufSize;
if (!enough_lines)
break; //we can't output a dstY line so let's try with the next slice
}
#if COMPILE_TEMPLATE_MMX
c->blueDither= ff_dither8[dstY&1];