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74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
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/******************************************************************************
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*
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* Copyright 2022 Google LLC
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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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******************************************************************************/
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#ifndef __WAVE_H
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#define __WAVE_H
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#include <stdio.h>
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#include <stdint.h>
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/**
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* Read WAVE file header
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* fp Opened file, moved after header on return
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* bitdepth Return bitdepth
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* samplesize Return size of samples, in bytes
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* samplerate Return samplerate, in Hz
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* nchannels Return number of channels
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* nframes Return count of frames
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* return 0: Ok -1: Bad or unsupported WAVE File
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*/
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int wave_read_header(FILE *fp, int *bitdepth, int *samplesize,
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int *samplerate, int *nchannels, int *nframes);
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/**
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* Read PCM samples from wave file
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* fp Opened file
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* samplesize Size of samples, in bytes
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* nch, count Number of channels and count of frames to read
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* buffer Output buffer of `nchannels * count` interleaved samples
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* return Number of frames read
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*/
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int wave_read_pcm(FILE *fp, int samplesize,
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int nch, int count, void *_buffer);
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/**
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* Write WAVE file header
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* fp Opened file, moved after header on return
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* bitdepth Bitdepth
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* samplesize Size of samples
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* samplerate Samplerate, in Hz
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* nchannels Number of channels
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* nframes Count of frames
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*/
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void wave_write_header(FILE *fp, int bitdepth, int samplesize,
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int samplerate, int nchannels, int nframes);
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/**
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* Write PCM samples to wave file
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* fp Opened file
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* samplesize Size of samples, in bytes
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* pcm, nch PCM frames, as 'nch' interleaved samples
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* off, count Offset and count of frames
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*/
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void wave_write_pcm(FILE *fp, int samplesize,
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const void *pcm, int nch, int off, int count);
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#endif /* __WAVE_H */
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