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avfilter/vf_blend: use float for opacity calculations

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This commit is contained in:
Paul B Mahol 2021-08-27 09:30:36 +02:00
parent a6f00d4e82
commit 0cacef58fa
1 changed files with 9 additions and 9 deletions
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18
libavfilter/vf_blend.c
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@ -147,12 +147,12 @@ static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
ptrdiff_t width, ptrdiff_t height,
FilterParams *param, double *values, int starty)
{
const double opacity = param->opacity;
const float opacity = param->opacity;
int i, j;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
dst[j] = top[j] * opacity + bottom[j] * (1.f - opacity);
}
dst += dst_linesize;
top += top_linesize;
@ -169,7 +169,7 @@ static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
const uint16_t *top = (uint16_t*)_top;
const uint16_t *bottom = (uint16_t*)_bottom;
uint16_t *dst = (uint16_t*)_dst;
const double opacity = param->opacity;
const float opacity = param->opacity;
int i, j;
dst_linesize /= 2;
top_linesize /= 2;
@ -177,7 +177,7 @@ static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
dst[j] = top[j] * opacity + bottom[j] * (1.f - opacity);
}
dst += dst_linesize;
top += top_linesize;
@ -194,7 +194,7 @@ static void blend_normal_32bit(const uint8_t *_top, ptrdiff_t top_linesize,
const float *top = (float*)_top;
const float *bottom = (float*)_bottom;
float *dst = (float*)_dst;
const double opacity = param->opacity;
const float opacity = param->opacity;
int i, j;
dst_linesize /= 4;
top_linesize /= 4;
@ -202,7 +202,7 @@ static void blend_normal_32bit(const uint8_t *_top, ptrdiff_t top_linesize,
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
dst[j] = top[j] * opacity + bottom[j] * (1.f - opacity);
}
dst += dst_linesize;
top += top_linesize;
@ -217,7 +217,7 @@ static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize,
ptrdiff_t width, ptrdiff_t height, \
FilterParams *param, double *values, int starty) \
{ \
double opacity = param->opacity; \
const float opacity = param->opacity; \
int i, j; \
\
for (i = 0; i < height; i++) { \
@ -240,7 +240,7 @@ static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_line
const uint16_t *top = (const uint16_t*)_top; \
const uint16_t *bottom = (const uint16_t*)_bottom; \
uint16_t *dst = (uint16_t*)_dst; \
double opacity = param->opacity; \
const float opacity = param->opacity; \
int i, j; \
dst_linesize /= 2; \
top_linesize /= 2; \
@ -266,7 +266,7 @@ static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_line
const float *top = (const float*)_top; \
const float *bottom = (const float*)_bottom; \
float *dst = (float*)_dst; \
double opacity = param->opacity; \
const float opacity = param->opacity; \
int i, j; \
dst_linesize /= 4; \
top_linesize /= 4; \