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remove conversion U32 -> S8 warnings

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using an inline U32ToS8() function

Change-Id: I45f535c6c9b5de33d69acc17b466e183fcc19a63
This commit is contained in:
Pascal Massimino 2019-06-24 16:42:42 -07:00
parent 812a6b49fc
commit 1106478f42
1 changed files with 9 additions and 5 deletions
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14
src/dsp/lossless_enc.c
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@ -515,13 +515,17 @@ static WEBP_INLINE int ColorTransformDelta(int8_t color_pred, int8_t color) {
return ((int)color_pred * color) >> 5;
}
static WEBP_INLINE int8_t U32ToS8(uint32_t v) {
return (int8_t)(v & 0xff);
}
void VP8LTransformColor_C(const VP8LMultipliers* const m, uint32_t* data,
int num_pixels) {
int i;
for (i = 0; i < num_pixels; ++i) {
const uint32_t argb = data[i];
const int8_t green = (argb >> 8) & 0xff;
const int8_t red = (argb >> 16) & 0xff;
const int8_t green = U32ToS8(argb >> 8);
const int8_t red = U32ToS8(argb >> 16);
int new_red = red & 0xff;
int new_blue = argb & 0xff;
new_red -= ColorTransformDelta(m->green_to_red_, green);
@ -535,7 +539,7 @@ void VP8LTransformColor_C(const VP8LMultipliers* const m, uint32_t* data,
static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red,
uint32_t argb) {
const int8_t green = (argb >> 8) & 0xff;
const int8_t green = U32ToS8(argb >> 8);
int new_red = argb >> 16;
new_red -= ColorTransformDelta(green_to_red, green);
return (new_red & 0xff);
@ -544,8 +548,8 @@ static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red,
static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue,
uint8_t red_to_blue,
uint32_t argb) {
const int8_t green = (argb >> 8) & 0xff;
const int8_t red = (argb >> 16) & 0xff;
const int8_t green = U32ToS8(argb >> 8);
const int8_t red = U32ToS8(argb >> 16);
uint8_t new_blue = argb & 0xff;
new_blue -= ColorTransformDelta(green_to_blue, green);
new_blue -= ColorTransformDelta(red_to_blue, red);