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/**
* Copyright (C) 2022 The Android Open Source Project
*
* 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.
*/
/*------------------------------------------------------------------------------
*
* This file exposes a public interface to allow clients to invoke aptX
* encoding on 4 new PCM samples, generating 2 new codeword (one for the
* left channel and one for the right channel).
*
*----------------------------------------------------------------------------*/
#ifndef APTXBTENC_H
#define APTXBTENC_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _DLLEXPORT
#define APTXBTENCEXPORT __declspec(dllexport)
#else
#define APTXBTENCEXPORT
#endif
/* SizeofAptxbtenc returns the size (in byte) of the memory
* allocation required to store the state of the encoder */
APTXBTENCEXPORT int SizeofAptxbtenc(void);
/* aptxbtenc_version can be used to extract the version number
* of the aptX encoder */
APTXBTENCEXPORT const char* aptxbtenc_version(void);
/* aptxbtenc_init is used to initialise the encoder structure.
* _state should be a pointer to the encoder structure (stereo).
* endian represent the endianness of the output data
* (0=little endian. Big endian otherwise)
* The function returns 1 if an error occurred during the initialisation.
* The function returns 0 if no error occurred during the initialisation. */
APTXBTENCEXPORT int aptxbtenc_init(void* _state, short endian);
/* aptxbtenc_setsync_mode is used to initialise the sync mode in the encoder
* state structure. _state should be a pointer to the encoder structure (stereo,
* though strictly-speaking it is dual channel). 'sync_mode' is an enumerated
* type {stereo=0, dualmono=1, no_sync=2} The function returns 0 if no error
* occurred during the initialisation. */
APTXBTENCEXPORT int aptxbtenc_setsync_mode(void* _state, int32_t sync_mode);
/* StereoEncode will take 8 audio samples (16-bit per sample)
* and generate one 32-bit codeword with autosync inserted. */
APTXBTENCEXPORT int aptxbtenc_encodestereo(void* _state, void* _pcmL,
void* _pcmR, void* _buffer);
#ifdef __cplusplus
} // /extern "C"
#endif
#endif // APTXBTENC_H
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