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sws: do not reallocate scratch buffers for each slice

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This commit is contained in:
Anton Khirnov 2021-05-19 14:45:34 +02:00
parent 2730639259
commit 0f8e0957d2
3 changed files with 27 additions and 8 deletions
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20
libswscale/swscale.c
View File

@ -871,7 +871,6 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
int i, ret;
const uint8_t *src2[4];
uint8_t *dst2[4];
uint8_t *rgb0_tmp = NULL;
int macro_height = isBayer(c->srcFormat) ? 2 : (1 << c->chrSrcVSubSample);
// copy strides, so they can safely be modified
int srcStride2[4];
@ -928,11 +927,14 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
uint8_t *base;
int x,y;
rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
if (!rgb0_tmp)
av_fast_malloc(&c->rgb0_scratch, &c->rgb0_scratch_allocated,
FFABS(srcStride[0]) * srcSliceH + 32);
if (!c->rgb0_scratch)
return AVERROR(ENOMEM);
base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
base = srcStride[0] < 0 ? c->rgb0_scratch - srcStride[0] * (srcSliceH-1) :
c->rgb0_scratch;
for (y=0; y<srcSliceH; y++){
memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
@ -944,11 +946,14 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
uint8_t *base;
rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
if (!rgb0_tmp)
av_fast_malloc(&c->xyz_scratch, &c->xyz_scratch_allocated,
FFABS(srcStride[0]) * srcSliceH + 32);
if (!c->xyz_scratch)
return AVERROR(ENOMEM);
base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
base = srcStride[0] < 0 ? c->xyz_scratch - srcStride[0] * (srcSliceH-1) :
c->xyz_scratch;
xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);
src2[0] = base;
@ -996,6 +1001,5 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
rgb48Toxyz12(c, dst16, dst16, dstStride2[0]/2, ret);
}
av_free(rgb0_tmp);
return ret;
}

12
libswscale/swscale_internal.h
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@ -626,6 +626,18 @@ typedef struct SwsContext {
SwsDither dither;
SwsAlphaBlend alphablend;
// scratch buffer for converting packed rgb0 sources
// filled with a copy of the input frame + fully opaque alpha,
// then passed as input to further conversion
uint8_t *rgb0_scratch;
unsigned int rgb0_scratch_allocated;
// scratch buffer for converting XYZ sources
// filled with the input converted to rgb48
// then passed as input to further conversion
uint8_t *xyz_scratch;
unsigned int xyz_scratch_allocated;
} SwsContext;
//FIXME check init (where 0)

3
libswscale/utils.c
View File

@ -2295,6 +2295,9 @@ void sws_freeContext(SwsContext *c)
av_freep(&c->gamma);
av_freep(&c->inv_gamma);
av_freep(&c->rgb0_scratch);
av_freep(&c->xyz_scratch);
ff_free_filters(c);
av_free(c);