/*

 * Copyright (C) 2020, University of the Basque Country (UPV/EHU)

 * Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
 *
 * The original file was part of Open Source Doubango Framework
 * Copyright (C) 2010-2011 Mamadou Diop.
 * Copyright (C) 2012 Doubango Telecom <http://doubango.org>
 *
 * This file is part of Open Source Doubango Framework.
 *
 * DOUBANGO is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DOUBANGO is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DOUBANGO.
 *
 */
 
 /**@file AudioResampler.cxx
  * @brief Audio resampler
  *
  * @author Mamadou Diop <diopmamadou(at)doubango.org>
  */
 #include "AudioResampler.h"
 
 #include "tinymedia/tmedia_resampler.h"
 
 #include "tsk_debug.h"
 
 AudioResampler::AudioResampler(uint32_t nInFreq, uint32_t nOutFreq, uint32_t nFrameDuration, uint32_t nChannels, uint32_t nQuality):
 m_nOutFreq(nOutFreq), 
 m_nInFreq(nInFreq), 
 m_nFrameDuration(nFrameDuration), 
 m_nChannels(nChannels),
 m_nQuality(nQuality)
 {
 	if ((m_pWrappedResampler = tmedia_resampler_create())) {
 		int ret;
 		if ((ret = tmedia_resampler_open(m_pWrappedResampler, nInFreq, nOutFreq, nFrameDuration, nChannels, nChannels, m_nQuality, 16))){
 			TSK_DEBUG_ERROR("Failed to open audio resampler (%d)", ret);
 			TSK_OBJECT_SAFE_FREE(m_pWrappedResampler);
 		}
 	}
 	else {
 		TSK_DEBUG_ERROR("No audio resampler could be found. Did you forget to call tdav_init()?");
 	}
 }
 
 AudioResampler::~AudioResampler()
 {
 	TSK_OBJECT_SAFE_FREE(m_pWrappedResampler);
 }
 
 uint32_t AudioResampler::process(const void* pInData, uint32_t nInSizeInBytes, void* pOutData, uint32_t nOutSizeInBytes)
 {
 	if(!m_pWrappedResampler){
 		TSK_DEBUG_ERROR("Embedded resampler is invalid");
 		return 0;
 	}
 	if(nInSizeInBytes < getInputRequiredSizeInShort()/2){
 		TSK_DEBUG_ERROR("Input buffer is too short");
 		return 0;
 	}
 	if(nOutSizeInBytes < getOutputRequiredSizeInShort()/2){
 		TSK_DEBUG_ERROR("Output buffer is too short");
 		return 0;
 	}
 	return 2*tmedia_resampler_process(m_pWrappedResampler, (uint16_t*)pInData, nInSizeInBytes/2, (uint16_t*)pOutData, nOutSizeInBytes/2);
 }