87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __AUDIO_UTIL_SNDFILE_H
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#define __AUDIO_UTIL_SNDFILE_H
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// This is a C library for reading and writing PCM .wav files. It is
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// influenced by other libraries such as libsndfile and audiofile, except is
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// much smaller and has an Apache 2.0 license.
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// The API should be familiar to clients of similar libraries, but there is
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// no guarantee that it will stay exactly source-code compatible with other libraries.
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#include <stdio.h>
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#include <sys/cdefs.h>
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/** \cond */
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__BEGIN_DECLS
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/** \endcond */
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// visible to clients
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typedef int sf_count_t;
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typedef struct {
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sf_count_t frames;
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int samplerate;
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int channels;
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int format;
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} SF_INFO;
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// opaque to clients
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typedef struct SNDFILE_ SNDFILE;
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// Access modes
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#define SFM_READ 1
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#define SFM_WRITE 2
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// Format
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#define SF_FORMAT_TYPEMASK 1
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#define SF_FORMAT_WAV 1
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#define SF_FORMAT_SUBMASK 14
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#define SF_FORMAT_PCM_16 2
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#define SF_FORMAT_PCM_U8 4
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#define SF_FORMAT_FLOAT 6
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#define SF_FORMAT_PCM_32 8
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#define SF_FORMAT_PCM_24 10
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/** Open stream */
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SNDFILE *sf_open(const char *path, int mode, SF_INFO *info);
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/** Close stream */
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void sf_close(SNDFILE *handle);
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/**
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* Read interleaved frames
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* \return actual number of frames read
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*/
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sf_count_t sf_readf_short(SNDFILE *handle, int16_t *ptr, sf_count_t desired);
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sf_count_t sf_readf_float(SNDFILE *handle, float *ptr, sf_count_t desired);
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sf_count_t sf_readf_int(SNDFILE *handle, int *ptr, sf_count_t desired);
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/**
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* Write interleaved frames
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* \return actual number of frames written
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*/
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sf_count_t sf_writef_short(SNDFILE *handle, const int16_t *ptr, sf_count_t desired);
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sf_count_t sf_writef_float(SNDFILE *handle, const float *ptr, sf_count_t desired);
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sf_count_t sf_writef_int(SNDFILE *handle, const int *ptr, sf_count_t desired);
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/** \cond */
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__END_DECLS
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/** \endcond */
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#endif /* __AUDIO_UTIL_SNDFILE_H */
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