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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PCM_UTILS_H
#define PCM_UTILS_H
#include "../config.h"
#include <stdint.h>
#include <stddef.h>
#ifdef HAVE_LIBSAMPLERATE
#include <samplerate.h>
#endif
struct audio_format;
struct pcm_convert_state {
#ifdef HAVE_LIBSAMPLERATE
SRC_STATE *state;
SRC_DATA data;
size_t dataInSize;
size_t dataOutSize;
int8_t lastChannels;
uint32_t lastInSampleRate;
uint32_t lastOutSampleRate;
#endif
/* Strict C99 doesn't allow empty structs */
int error;
};
void pcm_volume(char *buffer, int bufferSize,
const struct audio_format *format,
int volume);
void pcm_mix(char *buffer1, const char *buffer2, size_t size,
const struct audio_format *format, float portion1);
size_t pcm_convert(const struct audio_format *inFormat,
const char *inBuffer, size_t inSize,
const struct audio_format *outFormat,
char *outBuffer,
struct pcm_convert_state *convState);
size_t pcm_convert_size(const struct audio_format *inFormat, size_t inSize,
const struct audio_format *outFormat);
#endif
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