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Add support for 24bit samples encoded in the LSB of 32 bit words

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This commit is contained in:
Lennart Poettering 2009-01-16 18:39:36 +01:00
parent 6dc76d1158
commit 4a13763797
13 changed files with 339 additions and 19 deletions
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115
src/pulsecore/sconv-s16le.c
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@ -41,23 +41,34 @@
#ifndef INT16_FROM
#define INT16_FROM PA_INT16_FROM_LE
#endif
#ifndef UINT16_FROM
#define UINT16_FROM PA_UINT16_FROM_LE
#endif
#ifndef INT16_TO
#define INT16_TO PA_INT16_TO_LE
#endif
#ifndef UINT16_TO
#define UINT16_TO PA_UINT16_TO_LE
#endif
#ifndef INT32_FROM
#define INT32_FROM PA_INT32_FROM_LE
#endif
#ifndef UINT32_FROM
#define UINT32_FROM PA_UINT32_FROM_LE
#endif
#ifndef INT32_TO
#define INT32_TO PA_INT32_TO_LE
#endif
#ifndef UINT32_TO
#define UINT32_TO PA_UINT32_TO_LE
#endif
#ifndef READ24
#define READ24 PA_READ24LE
#endif
#ifndef WRITE24
#define WRITE24 PA_WRITE24LE
#endif
@ -353,3 +364,105 @@ void pa_sconv_s24le_from_float32re(unsigned n, const float *a, uint8_t *b) {
b+=3;
}
}
void pa_sconv_s24_32le_to_s16ne(unsigned n, const uint32_t *a, int16_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
*b = (int16_t) ((int32_t) (UINT32_FROM(*a) << 8) >> 16);
a++;
b++;
}
}
void pa_sconv_s24_32le_to_s16re(unsigned n, const uint32_t *a, int16_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
int16_t s = (int16_t) ((int32_t) (UINT32_FROM(*a) << 8) >> 16);
*b = PA_INT16_SWAP(s);
a++;
b++;
}
}
void pa_sconv_s24_32le_from_s16ne(unsigned n, const int16_t *a, uint32_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
*b = UINT32_TO(((uint32_t) ((int32_t) *a << 16)) >> 8);
a++;
b++;
}
}
void pa_sconv_s24_32le_from_s16re(unsigned n, const int16_t *a, uint32_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
uint32_t s = ((uint32_t) ((int32_t) PA_INT16_SWAP(*a) << 16)) >> 8;
*b = UINT32_TO(s);
a++;
b++;
}
}
void pa_sconv_s24_32le_to_float32ne(unsigned n, const uint32_t *a, float *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
int32_t s = (int16_t) ((int32_t) (UINT32_FROM(*a) << 8));
*b = ((float) s) / 0x7FFFFFFF;
a ++;
b ++;
}
}
void pa_sconv_s24_32le_to_float32re(unsigned n, const uint32_t *a, float *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
int32_t s = (int16_t) ((int32_t) (UINT32_FROM(*a) << 8));
float k = ((float) s) / 0x7FFFFFFF;
*b = PA_FLOAT32_SWAP(k);
a ++;
b ++;
}
}
void pa_sconv_s24_32le_from_float32ne(unsigned n, const float *a, uint32_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
int32_t s;
float v = *a;
v = PA_CLAMP_UNLIKELY(v, -1.0f, 1.0f);
s = (int32_t) lrint((double) v * (double) 0x7FFFFFFF);
*b = UINT32_TO(((uint32_t) s) >> 8);
a++;
b++;
}
}
void pa_sconv_s24_32le_from_float32re(unsigned n, const float *a, uint32_t *b) {
pa_assert(a);
pa_assert(b);
for (; n > 0; n--) {
int32_t s;
float v = *a;
v = PA_FLOAT32_SWAP(v);
v = PA_CLAMP_UNLIKELY(v, -1.0f, 1.0f);
s = (int32_t) lrint((double) v * (double) 0x7FFFFFFF);
*b = UINT32_TO(((uint32_t) s) >> 8);
a++;
b++;
}
}