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add WEBP_DSP_INIT / WEBP_DSP_INIT_FUNC

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this internalizes the init checks and provides stronger synchronization
with pthreads when available while still allowing VP8GetCPUInfo to be
modified (mostly for testing purposes). windows is left as is since a
critical section or mutex would cause a leak.

Change-Id: Ieb997e014f2805c0ae39c16f13337663521356f4
(cherry picked from commit d77bf512bd)
This commit is contained in:
James Zern
2018-04-16 20:19:54 -07:00
parent c1cb86af5f
commit 0d5fad46cf
15 changed files with 54 additions and 104 deletions
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9
src/dsp/lossless.c
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@ -577,9 +577,6 @@ extern void VP8LDspInitNEON(void);
extern void VP8LDspInitMIPSdspR2(void);
extern void VP8LDspInitMSA(void);
static volatile VP8CPUInfo lossless_last_cpuinfo_used =
(VP8CPUInfo)&lossless_last_cpuinfo_used;
#define COPY_PREDICTOR_ARRAY(IN, OUT) do { \
(OUT)[0] = IN##0_C; \
(OUT)[1] = IN##1_C; \
@ -599,9 +596,7 @@ static volatile VP8CPUInfo lossless_last_cpuinfo_used =
(OUT)[15] = IN##0_C; \
} while (0);
WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInit(void) {
if (lossless_last_cpuinfo_used == VP8GetCPUInfo) return;
WEBP_DSP_INIT_FUNC(VP8LDspInit) {
COPY_PREDICTOR_ARRAY(Predictor, VP8LPredictors)
COPY_PREDICTOR_ARRAY(Predictor, VP8LPredictors_C)
COPY_PREDICTOR_ARRAY(PredictorAdd, VP8LPredictorsAdd)
@ -658,8 +653,6 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInit(void) {
assert(VP8LConvertBGRAToRGB565 != NULL);
assert(VP8LMapColor32b != NULL);
assert(VP8LMapColor8b != NULL);
lossless_last_cpuinfo_used = VP8GetCPUInfo;
}
#undef COPY_PREDICTOR_ARRAY