mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
22db575adc
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@468 fefdeb5f-60dc-0310-8127-8f9354f1896f
328 lines
10 KiB
C
328 lines
10 KiB
C
/* $Id$ */
|
|
|
|
/***
|
|
This file is part of polypaudio.
|
|
|
|
polypaudio is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published
|
|
by the Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
polypaudio is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with polypaudio; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
USA.
|
|
***/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <liboil/liboilfuncs.h>
|
|
|
|
#include "log.h"
|
|
#include "sample-util.h"
|
|
|
|
pa_memblock *pa_silence_memblock(pa_memblock* b, const pa_sample_spec *spec) {
|
|
assert(b && b->data && spec);
|
|
pa_silence_memory(b->data, b->length, spec);
|
|
return b;
|
|
}
|
|
|
|
void pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec) {
|
|
assert(c && c->memblock && c->memblock->data && spec && c->length);
|
|
|
|
pa_silence_memory((uint8_t*) c->memblock->data+c->index, c->length, spec);
|
|
}
|
|
|
|
void pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec) {
|
|
uint8_t c = 0;
|
|
assert(p && length && spec);
|
|
|
|
switch (spec->format) {
|
|
case PA_SAMPLE_U8:
|
|
c = 0x80;
|
|
break;
|
|
case PA_SAMPLE_S16LE:
|
|
case PA_SAMPLE_S16BE:
|
|
case PA_SAMPLE_FLOAT32:
|
|
c = 0;
|
|
break;
|
|
case PA_SAMPLE_ALAW:
|
|
case PA_SAMPLE_ULAW:
|
|
c = 80;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
memset(p, c, length);
|
|
}
|
|
|
|
size_t pa_mix(
|
|
const pa_mix_info streams[],
|
|
unsigned nstreams,
|
|
void *data,
|
|
size_t length,
|
|
const pa_sample_spec *spec,
|
|
const pa_cvolume *volume) {
|
|
|
|
assert(streams && data && length && spec);
|
|
|
|
switch (spec->format) {
|
|
case PA_SAMPLE_S16NE:{
|
|
size_t d;
|
|
unsigned channel = 0;
|
|
|
|
for (d = 0;; d += sizeof(int16_t)) {
|
|
int32_t sum = 0;
|
|
|
|
if (d >= length)
|
|
return d;
|
|
|
|
if (volume->values[channel] != PA_VOLUME_MUTED) {
|
|
unsigned i;
|
|
|
|
for (i = 0; i < nstreams; i++) {
|
|
int32_t v;
|
|
pa_volume_t cvolume = streams[i].volume.values[channel];
|
|
|
|
if (d >= streams[i].chunk.length)
|
|
return d;
|
|
|
|
if (cvolume == PA_VOLUME_MUTED)
|
|
v = 0;
|
|
else {
|
|
v = *((int16_t*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
|
|
|
|
if (cvolume != PA_VOLUME_NORM) {
|
|
v *= cvolume;
|
|
v /= PA_VOLUME_NORM;
|
|
}
|
|
}
|
|
|
|
sum += v;
|
|
}
|
|
|
|
if (volume->values[channel] != PA_VOLUME_NORM) {
|
|
sum *= volume->values[channel];
|
|
sum /= PA_VOLUME_NORM;
|
|
}
|
|
|
|
if (sum < -0x8000) sum = -0x8000;
|
|
if (sum > 0x7FFF) sum = 0x7FFF;
|
|
|
|
}
|
|
|
|
*((int16_t*) data) = sum;
|
|
data = (uint8_t*) data + sizeof(int16_t);
|
|
|
|
if (++channel >= spec->channels)
|
|
channel = 0;
|
|
}
|
|
}
|
|
|
|
case PA_SAMPLE_U8: {
|
|
size_t d;
|
|
unsigned channel = 0;
|
|
|
|
for (d = 0;; d ++) {
|
|
int32_t sum = 0;
|
|
|
|
if (d >= length)
|
|
return d;
|
|
|
|
if (volume->values[channel] != PA_VOLUME_MUTED) {
|
|
unsigned i;
|
|
|
|
for (i = 0; i < nstreams; i++) {
|
|
int32_t v;
|
|
pa_volume_t cvolume = streams[i].volume.values[channel];
|
|
|
|
if (d >= streams[i].chunk.length)
|
|
return d;
|
|
|
|
if (cvolume == PA_VOLUME_MUTED)
|
|
v = 0;
|
|
else {
|
|
v = (int32_t) *((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d) - 0x80;
|
|
|
|
if (cvolume != PA_VOLUME_NORM) {
|
|
v *= cvolume;
|
|
v /= PA_VOLUME_NORM;
|
|
}
|
|
}
|
|
|
|
sum += v;
|
|
}
|
|
|
|
if (volume->values[channel] != PA_VOLUME_NORM) {
|
|
sum *= volume->values[channel];
|
|
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 (++channel >= spec->channels)
|
|
channel = 0;
|
|
}
|
|
}
|
|
|
|
case PA_SAMPLE_FLOAT32NE: {
|
|
size_t d;
|
|
unsigned channel = 0;
|
|
|
|
for (d = 0;; d += sizeof(float)) {
|
|
float sum = 0;
|
|
|
|
if (d >= length)
|
|
return d;
|
|
|
|
if (volume->values[channel] != PA_VOLUME_MUTED) {
|
|
unsigned i;
|
|
|
|
for (i = 0; i < nstreams; i++) {
|
|
float v;
|
|
pa_volume_t cvolume = streams[i].volume.values[channel];
|
|
|
|
if (d >= streams[i].chunk.length)
|
|
return d;
|
|
|
|
if (cvolume == PA_VOLUME_MUTED)
|
|
v = 0;
|
|
else {
|
|
v = *((float*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
|
|
|
|
if (cvolume != PA_VOLUME_NORM) {
|
|
v *= cvolume;
|
|
v /= PA_VOLUME_NORM;
|
|
}
|
|
}
|
|
|
|
sum += v;
|
|
}
|
|
|
|
if (volume->values[channel] != PA_VOLUME_NORM) {
|
|
sum *= volume->values[channel];
|
|
sum /= PA_VOLUME_NORM;
|
|
}
|
|
}
|
|
|
|
*((float*) data) = sum;
|
|
data = (uint8_t*) data + sizeof(float);
|
|
|
|
if (++channel >= spec->channels)
|
|
channel = 0;
|
|
}
|
|
}
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
|
|
void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvolume *volume) {
|
|
assert(c && spec && (c->length % pa_frame_size(spec) == 0));
|
|
assert(volume);
|
|
|
|
if (pa_cvolume_channels_equal_to(volume, PA_VOLUME_NORM))
|
|
return;
|
|
|
|
if (pa_cvolume_channels_equal_to(volume, PA_VOLUME_MUTED)) {
|
|
pa_silence_memchunk(c, spec);
|
|
return;
|
|
}
|
|
|
|
switch (spec->format) {
|
|
case PA_SAMPLE_S16NE: {
|
|
int16_t *d;
|
|
size_t n;
|
|
unsigned channel = 0;
|
|
|
|
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->values[channel];
|
|
t /= PA_VOLUME_NORM;
|
|
|
|
if (t < -0x8000) t = -0x8000;
|
|
if (t > 0x7FFF) t = 0x7FFF;
|
|
|
|
*d = (int16_t) t;
|
|
|
|
if (++channel >= spec->channels)
|
|
channel = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PA_SAMPLE_U8: {
|
|
uint8_t *d;
|
|
size_t n;
|
|
unsigned channel = 0;
|
|
|
|
for (d = (uint8_t*) c->memblock->data + c->index, n = c->length; n > 0; d++, n--) {
|
|
int32_t t = (int32_t) *d - 0x80;
|
|
|
|
t *= volume->values[channel];
|
|
t /= PA_VOLUME_NORM;
|
|
|
|
if (t < -0x80) t = -0x80;
|
|
if (t > 0x7F) t = 0x7F;
|
|
|
|
*d = (uint8_t) (t + 0x80);
|
|
|
|
if (++channel >= spec->channels)
|
|
channel = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PA_SAMPLE_FLOAT32NE: {
|
|
float *d;
|
|
int skip;
|
|
unsigned n;
|
|
unsigned channel;
|
|
|
|
d = (float*) ((uint8_t*) c->memblock->data + c->index);
|
|
skip = spec->channels * sizeof(float);
|
|
n = c->length/sizeof(float)/spec->channels;
|
|
|
|
for (channel = 0; channel < spec->channels ; channel ++) {
|
|
float v, *t;
|
|
|
|
if (volume->values[channel] == PA_VOLUME_NORM)
|
|
continue;
|
|
|
|
v = (float) volume->values[channel] / PA_VOLUME_NORM;
|
|
|
|
t = d + channel;
|
|
oil_scalarmult_f32(t, skip, t, skip, &v, n);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
pa_log_error(__FILE__": ERROR: Unable to change volume of format %s.\n",
|
|
pa_sample_format_to_string(spec->format));
|
|
abort();
|
|
}
|
|
}
|
|
|