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add new function pa_sample_clamp()

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2318 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2008-05-01 19:09:03 +00:00
parent 264385aae4
commit 9dd8f6ceb7
2 changed files with 33 additions and 0 deletions
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31
src/pulsecore/sample-util.c
View file

@ -1000,3 +1000,34 @@ pa_memchunk* pa_silence_memchunk_get(pa_silence_cache *cache, pa_mempool *pool,
return ret;
}
void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n) {
const float *s;
float *d;
if (format != PA_SAMPLE_FLOAT32BE && format != PA_SAMPLE_FLOAT32LE)
return;
s = src;
d = dst;
if (format == PA_SAMPLE_FLOAT32NE) {
for (; n > 0; n--) {
*d = PA_CLAMP_UNLIKELY(*s, -1.0, 1.0);
s = (const float*) ((const uint8_t*) s + sstr);
d = (float*) ((uint8_t*) d + dstr);
}
} else
for (; n > 0; n--) {
float f;
f = PA_FLOAT32_SWAP(*s);
f = PA_CLAMP_UNLIKELY(f, -1.0, 1.0);
*d = PA_FLOAT32_SWAP(f);
s = (const float*) ((const uint8_t*) s + sstr);
d = (float*) ((uint8_t*) d + dstr);
}
}

2
src/pulsecore/sample-util.h
View file

@ -78,4 +78,6 @@ int pa_frame_aligned(size_t l, const pa_sample_spec *ss) PA_GCC_PURE;
void pa_interleave(const void *src[], unsigned channels, void *dst, size_t ss, unsigned n);
void pa_deinterleave(const void *src, void *dst[], unsigned channels, size_t ss, unsigned n);
void pa_sample_clamp(pa_sample_format_t format, void *dst, size_t dstr, const void *src, size_t sstr, unsigned n);
#endif