//*****************************************************************************
//
//  ae.api.h
//! @file
//!
//! @brief Functions for interfacing with the encoder library
//!
//! @addtogroup 
//! @ingroup 
//! @{
//
//*****************************************************************************

//*****************************************************************************
//
// Copyright (c) 2020, Ambiq Micro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// Third party software included in this distribution is subject to the
// additional license terms as defined in the /docs/licenses directory.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// This is part of revision 2.4.2 of the AmbiqSuite Development Package.
//
//*****************************************************************************

#ifndef AE_API__H
#define AE_API__H


//*****************************************************************************
//
// External Function Calls
//
//*****************************************************************************

//*****************************************************************************
//
//! @brief Initialization of the library
//!
//! Run the initialization function before any operation with the encoder.
//! @param option - option to select whether to include 8-byte header into output.
//!                 0 for no header.
//!                 other value for with header.
//! @return numBytes - number of bytes of the data output, including header length. 
//!
//! @{
//
//*****************************************************************************
int audio_enc_init(int option);

//*****************************************************************************
//
//! @brief Encodes a frame of audio
//!
//! @param p_pcm_buffer - pointer to the input buffer.
//! @param n_pcm_samples - input length in samples.
//! @param p_encoded_buffer - pointer to the output buffer.
//!
//! This is the major function of the encoder, the encoder encodes a fixed length 
//! of audio (20ms) in a fixed input format (16KHz, 16bit, mono, 640 bytes in length), 
//! with a fixed output format: CBR, 32000bps output rate (8:1 compression), 
//! complexity 4.
//! When output header is selected, each output frame will have a 8 byte header in
//! the beginning of the output data: 4 bytes of length (fixed to 80) followed by 
//! 4 bytes of range code.
//!
//! @return numBytes - number of bytes of the data output, including header length. 
//!
//! @{
//
//*****************************************************************************
int audio_enc_encode_frame(short *p_pcm_buffer, int n_pcm_samples, unsigned char *p_encoded_buffer);

//*****************************************************************************
//
//! @brief Get version information of the libary
//!
//! @return version_string - pointer to the libary version string. 
//!
//! @{
//
//*****************************************************************************
char* audio_get_lib_version(void);

//*****************************************************************************
//
//! @brief Get version information of the base package
//!
//! @return version_string - pointer to the base package version string. 
//!                          version information is 7 byte long without line break
//! @{
//
//*****************************************************************************
char* audio_get_package_version(void);

#endif // AE_API__H