mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-08 13:29:59 -05:00
1cda717252
I think this makes the code a bit nicer to read and write. This also reduces the chances of off-by-one errors when checking the bounds of the sample format value.
273 lines
8.3 KiB
C
273 lines
8.3 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulsecore/macro.h>
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#include <pulsecore/g711.h>
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#include <pulsecore/endianmacros.h>
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#include "sample-util.h"
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static void pa_volume_u8_c(uint8_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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for (channel = 0; length; length--) {
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int32_t t = pa_mult_s16_volume(*samples - 0x80, volumes[channel]);
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t = PA_CLAMP_UNLIKELY(t, -0x80, 0x7F);
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*samples++ = (uint8_t) (t + 0x80);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_alaw_c(uint8_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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for (channel = 0; length; length--) {
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int32_t t = pa_mult_s16_volume(st_alaw2linear16(*samples), volumes[channel]);
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t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
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*samples++ = (uint8_t) st_13linear2alaw((int16_t) t >> 3);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_ulaw_c(uint8_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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for (channel = 0; length; length--) {
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int32_t t = pa_mult_s16_volume(st_ulaw2linear16(*samples), volumes[channel]);
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t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
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*samples++ = (uint8_t) st_14linear2ulaw((int16_t) t >> 2);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s16ne_c(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(int16_t);
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for (channel = 0; length; length--) {
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int32_t t = pa_mult_s16_volume(*samples, volumes[channel]);
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t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
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*samples++ = (int16_t) t;
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s16re_c(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(int16_t);
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for (channel = 0; length; length--) {
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int32_t t = pa_mult_s16_volume(PA_INT16_SWAP(*samples), volumes[channel]);
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t = PA_CLAMP_UNLIKELY(t, -0x8000, 0x7FFF);
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*samples++ = PA_INT16_SWAP((int16_t) t);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_float32ne_c(float *samples, const float *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(float);
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for (channel = 0; length; length--) {
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*samples++ *= volumes[channel];
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_float32re_c(float *samples, float *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(float);
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for (channel = 0; length; length--) {
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float t;
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t = PA_FLOAT32_SWAP(*samples);
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t *= volumes[channel];
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*samples++ = PA_FLOAT32_SWAP(t);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s32ne_c(int32_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(int32_t);
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for (channel = 0; length; length--) {
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int64_t t;
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t = (int64_t)(*samples);
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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*samples++ = (int32_t) t;
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s32re_c(int32_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(int32_t);
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for (channel = 0; length; length--) {
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int64_t t;
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t = (int64_t) PA_INT32_SWAP(*samples);
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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*samples++ = PA_INT32_SWAP((int32_t) t);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s24ne_c(uint8_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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uint8_t *e;
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e = samples + length;
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for (channel = 0; samples < e; samples += 3) {
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int64_t t;
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t = (int64_t)((int32_t) (PA_READ24NE(samples) << 8));
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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PA_WRITE24NE(samples, ((uint32_t) (int32_t) t) >> 8);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s24re_c(uint8_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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uint8_t *e;
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e = samples + length;
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for (channel = 0; samples < e; samples += 3) {
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int64_t t;
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t = (int64_t)((int32_t) (PA_READ24RE(samples) << 8));
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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PA_WRITE24RE(samples, ((uint32_t) (int32_t) t) >> 8);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s24_32ne_c(uint32_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(uint32_t);
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for (channel = 0; length; length--) {
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int64_t t;
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t = (int64_t) ((int32_t) (*samples << 8));
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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*samples++ = ((uint32_t) ((int32_t) t)) >> 8;
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static void pa_volume_s24_32re_c(uint32_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
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unsigned channel;
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length /= sizeof(uint32_t);
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for (channel = 0; length; length--) {
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int64_t t;
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t = (int64_t) ((int32_t) (PA_UINT32_SWAP(*samples) << 8));
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t = (t * volumes[channel]) >> 16;
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t = PA_CLAMP_UNLIKELY(t, -0x80000000LL, 0x7FFFFFFFLL);
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*samples++ = PA_UINT32_SWAP(((uint32_t) ((int32_t) t)) >> 8);
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if (PA_UNLIKELY(++channel >= channels))
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channel = 0;
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}
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}
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static pa_do_volume_func_t do_volume_table[] = {
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[PA_SAMPLE_U8] = (pa_do_volume_func_t) pa_volume_u8_c,
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[PA_SAMPLE_ALAW] = (pa_do_volume_func_t) pa_volume_alaw_c,
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[PA_SAMPLE_ULAW] = (pa_do_volume_func_t) pa_volume_ulaw_c,
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[PA_SAMPLE_S16NE] = (pa_do_volume_func_t) pa_volume_s16ne_c,
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[PA_SAMPLE_S16RE] = (pa_do_volume_func_t) pa_volume_s16re_c,
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[PA_SAMPLE_FLOAT32NE] = (pa_do_volume_func_t) pa_volume_float32ne_c,
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[PA_SAMPLE_FLOAT32RE] = (pa_do_volume_func_t) pa_volume_float32re_c,
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[PA_SAMPLE_S32NE] = (pa_do_volume_func_t) pa_volume_s32ne_c,
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[PA_SAMPLE_S32RE] = (pa_do_volume_func_t) pa_volume_s32re_c,
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[PA_SAMPLE_S24NE] = (pa_do_volume_func_t) pa_volume_s24ne_c,
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[PA_SAMPLE_S24RE] = (pa_do_volume_func_t) pa_volume_s24re_c,
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[PA_SAMPLE_S24_32NE] = (pa_do_volume_func_t) pa_volume_s24_32ne_c,
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[PA_SAMPLE_S24_32RE] = (pa_do_volume_func_t) pa_volume_s24_32re_c
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};
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pa_do_volume_func_t pa_get_volume_func(pa_sample_format_t f) {
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pa_assert(pa_sample_format_valid(f));
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return do_volume_table[f];
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}
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void pa_set_volume_func(pa_sample_format_t f, pa_do_volume_func_t func) {
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pa_assert(pa_sample_format_valid(f));
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do_volume_table[f] = func;
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}
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