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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 __LC3BIN_H
#define __LC3BIN_H
#include <stdio.h>
#include <stdint.h>
#include <lc3.h>
/**
* Read LC3 binary header
* fp Opened file, moved after header on return
* frame_us Return frame duration, in us
* srate_hz Return samplerate, in Hz
* nchannels Return number of channels
* nsamples Return count of source samples by channels
* return 0: Ok -1: Bad LC3 File
*/
int lc3bin_read_header(FILE *fp,
int *frame_us, int *srate_hz, int *nchannels, int *nsamples);
/**
* Read LC3 block of data
* fp Opened file
* nchannels Number of channels
* buffer Output buffer of `nchannels * LC3_MAX_FRAME_BYTES`
* return Size of each 'nchannels` frames, -1 on error
*/
int lc3bin_read_data(FILE *fp, int nchannels, void *buffer);
/**
* Write LC3 binary header
* fp Opened file, moved after header on return
* frame_us Frame duration, in us
* srate_hz Samplerate, in Hz
* bitrate Bitrate indication of the stream, in bps
* nchannels Number of channels
* nsamples Count of source samples by channels
*/
void lc3bin_write_header(FILE *fp,
int frame_us, int srate_hz, int bitrate, int nchannels, int nsamples);
/**
* Write LC3 block of data
* fp Opened file
* data The frames data
* nchannels Number of channels
* frame_bytes Size of each `nchannels` frames
*/
void lc3bin_write_data(FILE *fp,
const void *data, int nchannels, int frame_bytes);
#endif /* __LC3BIN_H */
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