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Remove ubsan errors.

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'upper' could be NULL and it would be increased.
But that is for predictor zero that does not use 'upper'.

Change-Id: Icd4ae6792cc55ea021b4f828c3dbdb5f03e120d8
This commit is contained in:
Vincent Rabaud 2019-11-06 10:38:42 +01:00
parent 78881b769c
commit bb7bc40b6d
2 changed files with 9 additions and 2 deletions
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9
src/dsp/lossless.c
View File

@ -167,15 +167,20 @@ static uint32_t Predictor13_C(uint32_t left, const uint32_t* const top) {
return pred;
}
GENERATE_PREDICTOR_ADD(Predictor0_C, PredictorAdd0_C)
static void PredictorAdd0_C(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int x;
(void)upper;
for (x = 0; x < num_pixels; ++x) out[x] = VP8LAddPixels(in[x], ARGB_BLACK);
}
static void PredictorAdd1_C(const uint32_t* in, const uint32_t* upper,
int num_pixels, uint32_t* out) {
int i;
uint32_t left = out[-1];
(void)upper;
for (i = 0; i < num_pixels; ++i) {
out[i] = left = VP8LAddPixels(in[i], left);
}
(void)upper;
}
GENERATE_PREDICTOR_ADD(Predictor2_C, PredictorAdd2_C)
GENERATE_PREDICTOR_ADD(Predictor3_C, PredictorAdd3_C)

2
src/dsp/lossless_common.h
View File

@ -177,6 +177,7 @@ uint32_t VP8LSubPixels(uint32_t a, uint32_t b) {
static void PREDICTOR_ADD(const uint32_t* in, const uint32_t* upper, \
int num_pixels, uint32_t* out) { \
int x; \
assert(upper != NULL); \
for (x = 0; x < num_pixels; ++x) { \
const uint32_t pred = (PREDICTOR)(out[x - 1], upper + x); \
out[x] = VP8LAddPixels(in[x], pred); \
@ -189,6 +190,7 @@ static void PREDICTOR_ADD(const uint32_t* in, const uint32_t* upper, \
static void PREDICTOR_SUB(const uint32_t* in, const uint32_t* upper, \
int num_pixels, uint32_t* out) { \
int x; \
assert(upper != NULL); \
for (x = 0; x < num_pixels; ++x) { \
const uint32_t pred = (PREDICTOR)(in[x - 1], upper + x); \
out[x] = VP8LSubPixels(in[x], pred); \