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