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Code Issues Releases Activity

sws: Fix RGB0->alpha containing formats.

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Fixes Ticket869

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-01-22 06:06:22 +01:00
parent fa94f8a848
commit 1c910d2f11
3 changed files with 40 additions and 7 deletions
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2
libswscale/swscale_internal.h
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@ -330,6 +330,8 @@ typedef struct SwsContext {
int dstColorspaceTable[4];
int srcRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (source image).
int dstRange; ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
int src0Alpha;
int dst0Alpha;
int yuv2rgb_y_offset;
int yuv2rgb_y_coeff;
int yuv2rgb_v2r_coeff;

24
libswscale/swscale_unscaled.c
View File

@ -909,9 +909,10 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
int srcSliceH, uint8_t *const dst[],
const int dstStride[])
{
int i;
int i, ret;
const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };
uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };
uint8_t *rgb0_tmp = NULL;
// do not mess up sliceDir if we have a "trailing" 0-size slice
if (srcSliceH == 0)
@ -997,6 +998,20 @@ 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);
base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
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) {
base[ srcStride[0]*y + x] = 0xFF;
}
}
src2[0] = base;
}
// copy strides, so they can safely be modified
if (c->sliceDir == 1) {
// slices go from top to bottom
@ -1012,7 +1027,7 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
if (srcSliceY + srcSliceH == c->srcH)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
ret = c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
dstStride2);
} else {
// slices go from bottom to top => we flip the image internally
@ -1038,9 +1053,12 @@ int attribute_align_arg sws_scale(struct SwsContext *c,
if (!srcSliceY)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
ret = c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
srcSliceH, dst2, dstStride2);
}
av_free(rgb0_tmp);
return ret;
}
/* Convert the palette to the same packed 32-bit format as the palette */

21
libswscale/utils.c
View File

@ -748,10 +748,17 @@ static int handle_jpeg(enum PixelFormat *format)
case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
case PIX_FMT_0BGR : *format = PIX_FMT_ABGR ; return 0;
case PIX_FMT_BGR0 : *format = PIX_FMT_BGRA ; return 0;
case PIX_FMT_0RGB : *format = PIX_FMT_ARGB ; return 0;
case PIX_FMT_RGB0 : *format = PIX_FMT_RGBA ; return 0;
default: return 0;
}
}
static int handle_0alpha(enum PixelFormat *format)
{
switch (*format) {
case PIX_FMT_0BGR : *format = PIX_FMT_ABGR ; return 1;
case PIX_FMT_BGR0 : *format = PIX_FMT_BGRA ; return 4;
case PIX_FMT_0RGB : *format = PIX_FMT_ARGB ; return 1;
case PIX_FMT_RGB0 : *format = PIX_FMT_RGBA ; return 4;
default: return 0;
}
}
@ -790,6 +797,8 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
handle_jpeg(&srcFormat);
handle_jpeg(&dstFormat);
handle_0alpha(&srcFormat);
handle_0alpha(&dstFormat);
if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat){
av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
@ -1147,6 +1156,8 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
c->dstH= dstH;
c->srcRange = handle_jpeg(&srcFormat);
c->dstRange = handle_jpeg(&dstFormat);
c->src0Alpha = handle_0alpha(&srcFormat);
c->dst0Alpha = handle_0alpha(&dstFormat);
c->srcFormat= srcFormat;
c->dstFormat= dstFormat;
@ -1545,10 +1556,12 @@ struct SwsContext *sws_getCachedContext(struct SwsContext *context,
context->srcW = srcW;
context->srcH = srcH;
context->srcRange = handle_jpeg(&srcFormat);
context->src0Alpha = handle_0alpha(&srcFormat);
context->srcFormat = srcFormat;
context->dstW = dstW;
context->dstH = dstH;
context->dstRange = handle_jpeg(&dstFormat);
context->dst0Alpha = handle_0alpha(&dstFormat);
context->dstFormat = dstFormat;
context->flags = flags;
context->param[0] = param[0];