#include <stdio.h>
#include <string.h>
#include <assert.h>
+#include <stdlib.h>
#include "sample-util.h"
}
void pa_silence_memory(void *p, size_t length, const struct pa_sample_spec *spec) {
- char c = 0;
+ uint8_t c = 0;
assert(p && length && spec);
switch (spec->format) {
case PA_SAMPLE_U8:
- c = 127;
+ c = 0x80;
break;
case PA_SAMPLE_S16LE:
case PA_SAMPLE_S16BE:
}
size_t pa_mix(struct pa_mix_info channels[], unsigned nchannels, void *data, size_t length, const struct pa_sample_spec *spec, pa_volume_t volume) {
- unsigned c, d;
assert(channels && data && length && spec);
- assert(spec->format == PA_SAMPLE_S16NE);
-
- for (d = 0;; d += sizeof(int16_t)) {
- int32_t sum = 0;
-
- if (d >= length)
- return d;
+
+ if (spec->format == PA_SAMPLE_S16NE) {
+ size_t d;
- for (c = 0; c < nchannels; c++) {
- int32_t v;
- uint32_t volume = channels[c].volume;
+ for (d = 0;; d += sizeof(int16_t)) {
+ unsigned c;
+ int32_t sum = 0;
- if (d >= channels[c].chunk.length)
+ if (d >= length)
return d;
-
+
+ for (c = 0; c < nchannels; c++) {
+ int32_t v;
+ pa_volume_t cvolume = channels[c].volume;
+
+ if (d >= channels[c].chunk.length)
+ return d;
+
+ if (cvolume == PA_VOLUME_MUTED)
+ v = 0;
+ else {
+ v = *((int16_t*) ((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d));
+
+ if (cvolume != PA_VOLUME_NORM) {
+ v *= cvolume;
+ v /= PA_VOLUME_NORM;
+ }
+ }
+
+ sum += v;
+ }
+
if (volume == PA_VOLUME_MUTED)
- v = 0;
- else {
- v = *((int16_t*) ((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d));
-
- if (volume != PA_VOLUME_NORM)
- v = (int32_t) ((float)v*volume/PA_VOLUME_NORM);
+ sum = 0;
+ else if (volume != PA_VOLUME_NORM) {
+ sum *= volume;
+ sum /= PA_VOLUME_NORM;
}
-
- sum += v;
+
+ if (sum < -0x8000) sum = -0x8000;
+ if (sum > 0x7FFF) sum = 0x7FFF;
+
+ *((int16_t*) data) = sum;
+ data = (uint8_t*) data + sizeof(int16_t);
+ }
+ } else if (spec->format == PA_SAMPLE_U8) {
+ size_t d;
+
+ for (d = 0;; d ++) {
+ int32_t sum = 0;
+ unsigned c;
+
+ if (d >= length)
+ return d;
+
+ for (c = 0; c < nchannels; c++) {
+ int32_t v;
+ pa_volume_t cvolume = channels[c].volume;
+
+ if (d >= channels[c].chunk.length)
+ return d;
+
+ if (cvolume == PA_VOLUME_MUTED)
+ v = 0;
+ else {
+ v = (int32_t) *((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d) - 0x80;
+
+ if (cvolume != PA_VOLUME_NORM) {
+ v *= cvolume;
+ v /= PA_VOLUME_NORM;
+ }
+ }
+
+ sum += v;
+ }
+
+ if (volume == PA_VOLUME_MUTED)
+ sum = 0;
+ else if (volume != PA_VOLUME_NORM) {
+ sum *= volume;
+ sum /= PA_VOLUME_NORM;
+ }
+
+ if (sum < -0x80) sum = -0x80;
+ if (sum > 0x7F) sum = 0x7F;
+
+ *((uint8_t*) data) = (uint8_t) (sum + 0x80);
+ data = (uint8_t*) data + 1;
}
-
- if (volume == PA_VOLUME_MUTED)
- sum = 0;
- else if (volume != PA_VOLUME_NORM)
- sum = (int32_t) ((float) sum*volume/PA_VOLUME_NORM);
- if (sum < -0x8000) sum = -0x8000;
- if (sum > 0x7FFF) sum = 0x7FFF;
+ } else if (spec->format == PA_SAMPLE_FLOAT32NE) {
+ size_t d;
- *((int16_t*) data) = sum;
- data = (uint8_t*) data + sizeof(int16_t);
+ for (d = 0;; d += sizeof(float)) {
+ float_t sum = 0;
+ unsigned c;
+
+ if (d >= length)
+ return d;
+
+ for (c = 0; c < nchannels; c++) {
+ float v;
+ pa_volume_t cvolume = channels[c].volume;
+
+ if (d >= channels[c].chunk.length)
+ return d;
+
+ if (cvolume == PA_VOLUME_MUTED)
+ v = 0;
+ else {
+ v = *((float*) ((uint8_t*) channels[c].chunk.memblock->data + channels[c].chunk.index + d));
+
+ if (cvolume != PA_VOLUME_NORM)
+ v = v*cvolume/PA_VOLUME_NORM;
+ }
+
+ sum += v;
+ }
+
+ if (volume == PA_VOLUME_MUTED)
+ sum = 0;
+ else if (volume != PA_VOLUME_NORM)
+ sum = sum*volume/PA_VOLUME_NORM;
+
+ if (sum < -1) sum = -1;
+ if (sum > 1) sum = 1;
+
+ *((float*) data) = sum;
+ data = (uint8_t*) data + sizeof(float);
+ }
+ } else {
+ abort();
}
}
void pa_volume_memchunk(struct pa_memchunk*c, const struct pa_sample_spec *spec, pa_volume_t volume) {
- int16_t *d;
- size_t n;
assert(c && spec && (c->length % pa_frame_size(spec) == 0));
- assert(spec->format == PA_SAMPLE_S16NE);
if (volume == PA_VOLUME_NORM)
return;
return;
}
- for (d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
- int32_t t = (int32_t)(*d);
+ if (spec->format == PA_SAMPLE_S16NE) {
+ int16_t *d;
+ size_t n;
+
+ for (d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
+ int32_t t = (int32_t)(*d);
+
+ t *= volume;
+ t /= PA_VOLUME_NORM;
+
+ if (t < -0x8000) t = -0x8000;
+ if (t > 0x7FFF) t = 0x7FFF;
+
+ *d = (int16_t) t;
+ }
+ } else if (spec->format == PA_SAMPLE_U8) {
+ uint8_t *d;
+ size_t n;
- t *= volume;
- t /= PA_VOLUME_NORM;
+ for (d = (uint8_t*) c->memblock->data + c->index, n = c->length; n > 0; d++, n--) {
+ int32_t t = (int32_t) *d - 0x80;
- if (t < -0x8000) t = -0x8000;
- if (t > 0x7FFF) t = 0x7FFF;
+ t *= volume;
+ t /= PA_VOLUME_NORM;
+
+ if (t < -0x80) t = -0x80;
+ if (t > 0x7F) t = 0x7F;
+
+ *d = (uint8_t) (t + 0x80);
+
+ }
+ } else if (spec->format == PA_SAMPLE_FLOAT32NE) {
+ float *d;
+ size_t n;
+
+ for (d = (float*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(float); n > 0; d++, n--) {
+ float t = *d;
+
+ t *= volume;
+ t /= PA_VOLUME_NORM;
+
+ if (t < -1) t = -1;
+ if (t > 1) t = 1;
+
+ *d = t;
+ }
- *d = (int16_t) t;
+ } else {
+ abort();
}
}