sample-util: move volume code to separate file

Move the volume code into a separate file with the reference C implementations.
Add a function to retrieve the volume function and one to install a new one.
This commit is contained in:
Wim Taymans 2009-08-11 17:10:44 +02:00
parent e71e644eb6
commit 3d008961c0
4 changed files with 347 additions and 311 deletions

View file

@ -825,6 +825,7 @@ libpulsecore_@PA_MAJORMINORMICRO@_la_SOURCES = \
pulsecore/resampler.c pulsecore/resampler.h \ pulsecore/resampler.c pulsecore/resampler.h \
pulsecore/rtpoll.c pulsecore/rtpoll.h \ pulsecore/rtpoll.c pulsecore/rtpoll.h \
pulsecore/sample-util.c pulsecore/sample-util.h \ pulsecore/sample-util.c pulsecore/sample-util.h \
pulsecore/svolume_c.c \
pulsecore/sconv-s16be.c pulsecore/sconv-s16be.h \ pulsecore/sconv-s16be.c pulsecore/sconv-s16be.h \
pulsecore/sconv-s16le.c pulsecore/sconv-s16le.h \ pulsecore/sconv-s16le.c pulsecore/sconv-s16le.h \
pulsecore/sconv.c pulsecore/sconv.h \ pulsecore/sconv.c pulsecore/sconv.h \

View file

@ -687,316 +687,6 @@ size_t pa_mix(
return length; return length;
} }
typedef struct pa_volume_funcs {
void (*u8) (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*alaw) (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*ulaw) (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s16ne) (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s16re) (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*float32ne) (float *samples, float *volumes, unsigned channels, unsigned length);
void (*float32re) (float *samples, float *volumes, unsigned channels, unsigned length);
void (*s32ne) (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s32re) (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s24ne) (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s24re) (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s24_32ne) (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length);
void (*s24_32re) (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length);
} pa_volume_funcs;
static void
pa_volume_u8_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) *samples - 0x80;
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x80, 0x7F);
*samples++ = (uint8_t) (t + 0x80);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_alaw_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) st_alaw2linear16(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (uint8_t) st_13linear2alaw((int16_t) t >> 3);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_ulaw_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) st_ulaw2linear16(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (uint8_t) st_14linear2ulaw((int16_t) t >> 2);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s16ne_c (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int16_t);
for (channel = 0; length; length--) {
int32_t t, hi, lo;
/* Multiplying the 32bit volume factor with the 16bit
* sample might result in an 48bit value. We want to
* do without 64 bit integers and hence do the
* multiplication independantly for the HI and LO part
* of the volume. */
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t)(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (int16_t) t;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s16re_c (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int16_t);
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) PA_INT16_SWAP(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = PA_INT16_SWAP((int16_t) t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_float32ne_c (float *samples, float *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (float);
for (channel = 0; length; length--) {
*samples++ *= volumes[channel];
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_float32re_c (float *samples, float *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (float);
for (channel = 0; length; length--) {
float t;
t = PA_FLOAT32_SWAP(*samples);
t *= volumes[channel];
*samples++ = PA_FLOAT32_SWAP(t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s32ne_c (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t)(*samples);
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = (int32_t) t;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s32re_c (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) PA_INT32_SWAP(*samples);
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = PA_INT32_SWAP((int32_t) t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24ne_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
uint8_t *e;
e = samples + length;
for (channel = 0; samples < e; samples += 3) {
int64_t t;
t = (int64_t)((int32_t) (PA_READ24NE(samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
PA_WRITE24NE(samples, ((uint32_t) (int32_t) t) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24re_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
uint8_t *e;
e = samples + length;
for (channel = 0; samples < e; samples += 3) {
int64_t t;
t = (int64_t)((int32_t) (PA_READ24RE(samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
PA_WRITE24RE(samples, ((uint32_t) (int32_t) t) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24_32ne_c (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (uint32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) ((int32_t) (*samples << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = ((uint32_t) ((int32_t) t)) >> 8;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24_32re_c (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (uint32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) ((int32_t) (PA_UINT32_SWAP(*samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = PA_UINT32_SWAP(((uint32_t) ((int32_t) t)) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
typedef void (*pa_do_volume_func_t) (void *samples, void *volumes, unsigned channels, unsigned length);
typedef struct pa_sample_func_t {
pa_do_volume_func_t do_volume;
} pa_sample_func_t;
static pa_do_volume_func_t do_volume_table[] =
{
[PA_SAMPLE_U8] = (pa_do_volume_func_t) pa_volume_u8_c,
[PA_SAMPLE_ALAW] = (pa_do_volume_func_t) pa_volume_alaw_c,
[PA_SAMPLE_ULAW] = (pa_do_volume_func_t) pa_volume_ulaw_c,
[PA_SAMPLE_S16NE] = (pa_do_volume_func_t) pa_volume_s16ne_c,
[PA_SAMPLE_S16RE] = (pa_do_volume_func_t) pa_volume_s16re_c,
[PA_SAMPLE_FLOAT32NE] = (pa_do_volume_func_t) pa_volume_float32ne_c,
[PA_SAMPLE_FLOAT32RE] = (pa_do_volume_func_t) pa_volume_float32re_c,
[PA_SAMPLE_S32NE] = (pa_do_volume_func_t) pa_volume_s32ne_c,
[PA_SAMPLE_S32RE] = (pa_do_volume_func_t) pa_volume_s32re_c,
[PA_SAMPLE_S24NE] = (pa_do_volume_func_t) pa_volume_s24ne_c,
[PA_SAMPLE_S24RE] = (pa_do_volume_func_t) pa_volume_s24re_c,
[PA_SAMPLE_S24_32NE] = (pa_do_volume_func_t) pa_volume_s24_32ne_c,
[PA_SAMPLE_S24_32RE] = (pa_do_volume_func_t) pa_volume_s24_32re_c
};
typedef union { typedef union {
float f; float f;
uint32_t i; uint32_t i;
@ -1027,6 +717,7 @@ void pa_volume_memchunk(
void *ptr; void *ptr;
volume_val linear[PA_CHANNELS_MAX]; volume_val linear[PA_CHANNELS_MAX];
pa_do_volume_func_t do_volume;
pa_assert(c); pa_assert(c);
pa_assert(spec); pa_assert(spec);
@ -1051,8 +742,11 @@ void pa_volume_memchunk(
ptr = (uint8_t*) pa_memblock_acquire(c->memblock) + c->index; ptr = (uint8_t*) pa_memblock_acquire(c->memblock) + c->index;
do_volume = pa_get_volume_func (spec->format);
pa_assert(do_volume);
calc_volume_table[spec->format] ((void *)linear, volume); calc_volume_table[spec->format] ((void *)linear, volume);
do_volume_table[spec->format] (ptr, (void *)linear, spec->channels, c->length); do_volume (ptr, (void *)linear, spec->channels, c->length);
pa_memblock_release(c->memblock); pa_memblock_release(c->memblock);
} }

View file

@ -86,6 +86,12 @@ void pa_memchunk_dump_to_file(pa_memchunk *c, const char *fn);
void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq); void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq);
typedef void (*pa_do_volume_func_t) (void *samples, void *volumes, unsigned channels, unsigned length);
pa_do_volume_func_t pa_get_volume_func(pa_sample_format_t f);
void pa_set_volume_func(pa_sample_format_t f, pa_do_volume_func_t func);
#define PA_CHANNEL_POSITION_MASK_LEFT \ #define PA_CHANNEL_POSITION_MASK_LEFT \
(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \ (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \
| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \ | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \

335
src/pulsecore/svolume_c.c Normal file
View file

@ -0,0 +1,335 @@
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio 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 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 PulseAudio; 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 <pulsecore/macro.h>
#include <pulsecore/g711.h>
#include <pulsecore/core-util.h>
#include "sample-util.h"
#include "endianmacros.h"
static void
pa_volume_u8_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) *samples - 0x80;
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x80, 0x7F);
*samples++ = (uint8_t) (t + 0x80);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_alaw_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) st_alaw2linear16(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (uint8_t) st_13linear2alaw((int16_t) t >> 3);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_ulaw_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) st_ulaw2linear16(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (uint8_t) st_14linear2ulaw((int16_t) t >> 2);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s16ne_c (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int16_t);
for (channel = 0; length; length--) {
int32_t t, hi, lo;
/* Multiplying the 32bit volume factor with the 16bit
* sample might result in an 48bit value. We want to
* do without 64 bit integers and hence do the
* multiplication independantly for the HI and LO part
* of the volume. */
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t)(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = (int16_t) t;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s16re_c (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int16_t);
for (channel = 0; length; length--) {
int32_t t, hi, lo;
hi = volumes[channel] >> 16;
lo = volumes[channel] & 0xFFFF;
t = (int32_t) PA_INT16_SWAP(*samples);
t = ((t * lo) >> 16) + (t * hi);
t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
*samples++ = PA_INT16_SWAP((int16_t) t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_float32ne_c (float *samples, float *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (float);
for (channel = 0; length; length--) {
*samples++ *= volumes[channel];
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_float32re_c (float *samples, float *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (float);
for (channel = 0; length; length--) {
float t;
t = PA_FLOAT32_SWAP(*samples);
t *= volumes[channel];
*samples++ = PA_FLOAT32_SWAP(t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s32ne_c (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t)(*samples);
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = (int32_t) t;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s32re_c (int32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (int32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) PA_INT32_SWAP(*samples);
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = PA_INT32_SWAP((int32_t) t);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24ne_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
uint8_t *e;
e = samples + length;
for (channel = 0; samples < e; samples += 3) {
int64_t t;
t = (int64_t)((int32_t) (PA_READ24NE(samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
PA_WRITE24NE(samples, ((uint32_t) (int32_t) t) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24re_c (uint8_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
uint8_t *e;
e = samples + length;
for (channel = 0; samples < e; samples += 3) {
int64_t t;
t = (int64_t)((int32_t) (PA_READ24RE(samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
PA_WRITE24RE(samples, ((uint32_t) (int32_t) t) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24_32ne_c (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (uint32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) ((int32_t) (*samples << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = ((uint32_t) ((int32_t) t)) >> 8;
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static void
pa_volume_s24_32re_c (uint32_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
unsigned channel;
length /= sizeof (uint32_t);
for (channel = 0; length; length--) {
int64_t t;
t = (int64_t) ((int32_t) (PA_UINT32_SWAP(*samples) << 8));
t = (t * volumes[channel]) >> 16;
t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
*samples++ = PA_UINT32_SWAP(((uint32_t) ((int32_t) t)) >> 8);
if (PA_UNLIKELY(++channel >= channels))
channel = 0;
}
}
static pa_do_volume_func_t do_volume_table[] =
{
[PA_SAMPLE_U8] = (pa_do_volume_func_t) pa_volume_u8_c,
[PA_SAMPLE_ALAW] = (pa_do_volume_func_t) pa_volume_alaw_c,
[PA_SAMPLE_ULAW] = (pa_do_volume_func_t) pa_volume_ulaw_c,
[PA_SAMPLE_S16NE] = (pa_do_volume_func_t) pa_volume_s16ne_c,
[PA_SAMPLE_S16RE] = (pa_do_volume_func_t) pa_volume_s16re_c,
[PA_SAMPLE_FLOAT32NE] = (pa_do_volume_func_t) pa_volume_float32ne_c,
[PA_SAMPLE_FLOAT32RE] = (pa_do_volume_func_t) pa_volume_float32re_c,
[PA_SAMPLE_S32NE] = (pa_do_volume_func_t) pa_volume_s32ne_c,
[PA_SAMPLE_S32RE] = (pa_do_volume_func_t) pa_volume_s32re_c,
[PA_SAMPLE_S24NE] = (pa_do_volume_func_t) pa_volume_s24ne_c,
[PA_SAMPLE_S24RE] = (pa_do_volume_func_t) pa_volume_s24re_c,
[PA_SAMPLE_S24_32NE] = (pa_do_volume_func_t) pa_volume_s24_32ne_c,
[PA_SAMPLE_S24_32RE] = (pa_do_volume_func_t) pa_volume_s24_32re_c
};
pa_do_volume_func_t pa_get_volume_func(pa_sample_format_t f) {
pa_assert(f >= 0);
pa_assert(f < PA_SAMPLE_MAX);
return do_volume_table[f];
}
void pa_set_volume_func(pa_sample_format_t f, pa_do_volume_func_t func) {
pa_assert(f >= 0);
pa_assert(f < PA_SAMPLE_MAX);
do_volume_table[f] = func;
}