1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* 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 "audio.h"
#include "os_compat.h"
#ifdef HAVE_LIBSAMPLERATE
#include <samplerate.h>
#endif
typedef struct _ConvState {
#ifdef HAVE_LIBSAMPLERATE
SRC_STATE *state;
SRC_DATA data;
size_t dataInSize;
size_t dataOutSize;
mpd_sint8 lastChannels;
mpd_uint32 lastInSampleRate;
mpd_uint32 lastOutSampleRate;
#endif
/* Strict C99 doesn't allow empty structs */
int error;
} ConvState;
void pcm_volumeChange(char *buffer, int bufferSize, const AudioFormat * format,
int volume);
void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1,
size_t bufferSize2, const AudioFormat * format, float portion1);
size_t pcm_convertAudioFormat(const AudioFormat * inFormat,
const char *inBuffer, size_t inSize,
const AudioFormat * outFormat,
char *outBuffer, ConvState *convState);
size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize,
const AudioFormat * outFormat);
#endif
|
