1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef __AUDIO_UTIL_SNDFILE_H
18#define __AUDIO_UTIL_SNDFILE_H
19
20// This is a C library for reading and writing PCM .wav files.  It is
21// influenced by other libraries such as libsndfile and audiofile, except is
22// much smaller and has an Apache 2.0 license.
23// The API should be familiar to clients of similar libraries, but there is
24// no guarantee that it will stay exactly source-code compatible with other libraries.
25
26#include <stdio.h>
27#include <sys/cdefs.h>
28
29__BEGIN_DECLS
30
31// visible to clients
32typedef int sf_count_t;
33
34typedef struct {
35    sf_count_t frames;
36    int samplerate;
37    int channels;
38    int format;
39} SF_INFO;
40
41// opaque to clients
42typedef struct SNDFILE_ SNDFILE;
43
44// Access modes
45#define SFM_READ    1
46#define SFM_WRITE   2
47
48// Format
49#define SF_FORMAT_TYPEMASK  1
50#define SF_FORMAT_WAV       1
51#define SF_FORMAT_SUBMASK   14
52#define SF_FORMAT_PCM_16    2
53#define SF_FORMAT_PCM_U8    4
54#define SF_FORMAT_FLOAT     6
55#define SF_FORMAT_PCM_32    8
56
57// Open stream
58SNDFILE *sf_open(const char *path, int mode, SF_INFO *info);
59
60// Close stream
61void sf_close(SNDFILE *handle);
62
63// Read interleaved frames and return actual number of frames read
64sf_count_t sf_readf_short(SNDFILE *handle, short *ptr, sf_count_t desired);
65sf_count_t sf_readf_float(SNDFILE *handle, float *ptr, sf_count_t desired);
66
67// Write interleaved frames and return actual number of frames written
68sf_count_t sf_writef_short(SNDFILE *handle, const short *ptr, sf_count_t desired);
69sf_count_t sf_writef_float(SNDFILE *handle, const float *ptr, sf_count_t desired);
70
71__END_DECLS
72
73#endif /* __AUDIO_UTIL_SNDFILE_H */
74