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/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 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.
* */
#include "aacDecode.h"
#include "aacdecoder_lib.h"
#include <utils/Log.h>
#include <string.h>
aacDecode::aacDecode() {
p_aacHandle = NULL;
p_aacInfo = NULL;
memset(&s_aacConfig, 0, sizeof(s_aacConfig));
}
aacDecode::~aacDecode() {
if(!p_aacHandle) {
return;
}
aacDecoder_Close((HANDLE_AACDECODER)p_aacHandle);
p_aacHandle = NULL;
}
bool aacDecode::aacConfigure(aacConfigType * p_aacConfig) {
if(!p_aacConfig) {
return false;
}
memcpy(&s_aacConfig, p_aacConfig, sizeof(s_aacConfig));
p_aacHandle = aacDecoder_Open(TT_MP4_ADTS, 1);
if(!p_aacHandle) {
ALOGE("Failed to open AAC decoder");
return false;
}
p_aacInfo = (void*)aacDecoder_GetStreamInfo((HANDLE_AACDECODER)p_aacHandle);
if(!p_aacInfo) {
ALOGE("Failed to get stream info");
return false;
}
/* Configure AAC decoder */
aacDecoder_SetParam((HANDLE_AACDECODER)p_aacHandle,
AAC_DRC_REFERENCE_LEVEL,
64);
aacDecoder_SetParam((HANDLE_AACDECODER)p_aacHandle,
AAC_DRC_ATTENUATION_FACTOR,
127);
aacDecoder_SetParam((HANDLE_AACDECODER)p_aacHandle,
AAC_PCM_MAX_OUTPUT_CHANNELS,
s_aacConfig.n_channels > 6 ? -1 : s_aacConfig.n_channels);
return true;
}
bool aacDecode::aacDecodeFrame(unsigned char* p_buffer, unsigned int n_size) {
if(!p_buffer || n_size < 7) {
ALOGE("No/Incorrect buffer provided for AAC decoder");
return false;
}
if(!p_aacHandle) {
ALOGE("Decoder handle not available");
return false;
}
AAC_DECODER_ERROR err = AAC_DEC_UNKNOWN;
UINT nSize[] = {(UINT)n_size};
UINT nOcc[] = {(UINT)n_size};
UCHAR* pBuf[] = {p_buffer};
err = aacDecoder_Fill((HANDLE_AACDECODER)p_aacHandle, pBuf, nSize, nOcc);
if(err != AAC_DEC_OK || nOcc[0] != 0) {
ALOGE("Error in aacDecoder_Fill");
return false;
}
/* Fix the alloc length being passed to AAC Decoder since it expects INT_PCM
as input buffer but we have it as UINT8. INT_PCM is of type SHORT */
int factor = sizeof(INT_PCM)/sizeof(unsigned char);
int allocLen = (factor == 0) ? n_size : n_size/factor;
err = aacDecoder_DecodeFrame((HANDLE_AACDECODER)p_aacHandle,
(INT_PCM*)p_buffer, allocLen, 0);
if(err != AAC_DEC_OK) {
ALOGE("Failed to decode frame");
return false;
}
return true;
}
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