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/******************************************************************************
*
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#ifndef __WAVE_H
#define __WAVE_H
#include <stdio.h>
#include <stdint.h>
/**
* Read WAVE file header
* fp Opened file, moved after header on return
* bitdepth Return bitdepth
* samplesize Return size of samples, in bytes
* samplerate Return samplerate, in Hz
* nchannels Return number of channels
* nframes Return count of frames
* return 0: Ok -1: Bad or unsupported WAVE File
*/
int wave_read_header(FILE *fp, int *bitdepth, int *samplesize,
int *samplerate, int *nchannels, int *nframes);
/**
* Read PCM samples from wave file
* fp Opened file
* samplesize Size of samples, in bytes
* nch, count Number of channels and count of frames to read
* buffer Output buffer of `nchannels * count` interleaved samples
* return Number of frames read
*/
int wave_read_pcm(FILE *fp, int samplesize,
int nch, int count, void *_buffer);
/**
* Write WAVE file header
* fp Opened file, moved after header on return
* bitdepth Bitdepth
* samplesize Size of samples
* samplerate Samplerate, in Hz
* nchannels Number of channels
* nframes Count of frames
*/
void wave_write_header(FILE *fp, int bitdepth, int samplesize,
int samplerate, int nchannels, int nframes);
/**
* Write PCM samples to wave file
* fp Opened file
* samplesize Size of samples, in bytes
* pcm, nch PCM frames, as 'nch' interleaved samples
* off, count Offset and count of frames
*/
void wave_write_pcm(FILE *fp, int samplesize,
const void *pcm, int nch, int off, int count);
#endif /* __WAVE_H */
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