msamr/opencore-amr/opencore/codecs_v2/audio/gsm_amr/amr_wb/dec/src/decoder_amr_wb.cpp
/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* 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.
* -------------------------------------------------------------------
*/
/****************************************************************************************
Portions of this file are derived from the following 3GPP standard:
3GPP TS 26.173
ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
Available from http://www.3gpp.org
(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
Permission to distribute, modify and use this file under the standard license
terms listed above has been obtained from the copyright holder.
****************************************************************************************/
//////////////////////////////////////////////////////////////////////////////////
// //
// File: decoder_amr_wb.cpp //
// //
//////////////////////////////////////////////////////////////////////////////////
#include "decoder_amr_wb.h"
#include "pvamrwbdecoder_api.h"
#include "pvamrwbdecoder.h"
#include "pvamrwbdecoder_cnst.h"
#include "dtx.h"
// Use default DLL entry point
#include "oscl_dll.h"
#include "oscl_error_codes.h"
#include "oscl_exception.h"
#include "oscl_mem.h"
#define KCAI_CODEC_INIT_FAILURE -1
OSCL_DLL_ENTRY_POINT_DEFAULT()
OSCL_EXPORT_REF CDecoder_AMR_WB *CDecoder_AMR_WB::NewL()
{
CDecoder_AMR_WB *dec = new CDecoder_AMR_WB;
if (dec == NULL)
OSCL_LEAVE(OsclErrNoMemory);
else
dec->ConstructL();
return dec;
}
OSCL_EXPORT_REF void CDecoder_AMR_WB::ConstructL()
{
st = NULL;
pt_st = NULL;
ScratchMem = NULL;
iInputBuf = NULL;
iOutputBuf = NULL;
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
~CDecoder_AMR_WB
Empty decoder destructor.
Parameters: none
Return Values: none
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF CDecoder_AMR_WB::~CDecoder_AMR_WB()
{
st = NULL;
ScratchMem = NULL;
if (pt_st != NULL)
{
OSCL_ARRAY_DELETE((uint8*)pt_st);
pt_st = NULL;
}
if (iInputBuf)
{
OSCL_ARRAY_DELETE(iInputBuf);
iInputBuf = NULL;
}
if (iOutputBuf)
{
OSCL_ARRAY_DELETE(iOutputBuf);
iOutputBuf = NULL;
}
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
StartL
Start decoder object. Initialize codec status.
Parameters: none
Return Values: status
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF int32 CDecoder_AMR_WB::StartL(tPVAmrDecoderExternal * pExt,
bool aAllocateInputBuffer,
bool aAllocateOutputBuffer)
{
/*
* Allocate Input bitstream buffer
*/
if (aAllocateInputBuffer)
{
iInputBuf = OSCL_ARRAY_NEW(uint8, KAMRWB_NB_BYTES_MAX);
if (iInputBuf == NULL)
{
return KCAI_CODEC_INIT_FAILURE;
}
}
else
{
iInputBuf = NULL;
}
pExt->pInputBuffer = iInputBuf;
iInputSampleBuf = OSCL_ARRAY_NEW(int16, KAMRWB_NB_BITS_MAX);
if (iInputSampleBuf == NULL)
{
return KCAI_CODEC_INIT_FAILURE;
}
pExt->pInputSampleBuffer = iInputSampleBuf;
/*
* Allocate Output PCM buffer
*/
if (aAllocateOutputBuffer)
{
iOutputBuf = OSCL_ARRAY_NEW(int16, AMR_WB_PCM_FRAME);
if (iOutputBuf == NULL)
{
return KCAI_CODEC_INIT_FAILURE;
}
}
else
{
iOutputBuf = NULL;
}
pExt->pOutputBuffer = iOutputBuf;
pExt->samplingRate = 16000;
pExt->desiredChannels = 1;
pExt->reset_flag = 0;
pExt->reset_flag_old = 1;
pExt->mode_old = 0;
pExt->rx_state.prev_ft = RX_SPEECH_GOOD;
pExt->rx_state.prev_mode = 0;
int32 memreq = pvDecoder_AmrWbMemRequirements();
pt_st = OSCL_ARRAY_NEW(uint8, memreq);
if (pt_st == 0)
{
return(KCAI_CODEC_INIT_FAILURE);
}
pvDecoder_AmrWb_Init(&st, pt_st, &ScratchMem);
return 0;
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
ExecuteL
Execute decoder object. Read one encoded speech frame from the input
stream, decode it and write the decoded frame to output stream.
Parameters:
Return Values: status
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF int32 CDecoder_AMR_WB::ExecuteL(tPVAmrDecoderExternal * pExt)
{
if (pExt->input_format == MIME_IETF) /* MIME/storage file format */
{
mime_unsorting(pExt->pInputBuffer,
pExt->pInputSampleBuffer,
&pExt->frame_type,
&pExt->mode,
pExt->quality,
&pExt->rx_state);
}
if ((pExt->frame_type == RX_NO_DATA) | (pExt->frame_type == RX_SPEECH_LOST))
{
pExt->mode = pExt->mode_old;
pExt->reset_flag = 0;
}
else
{
pExt->mode_old = pExt->mode;
/* if homed: check if this frame is another homing frame */
if (pExt->reset_flag_old == 1)
{
/* only check until end of first subframe */
pExt->reset_flag = pvDecoder_AmrWb_homing_frame_test_first(pExt->pInputSampleBuffer,
pExt->mode);
}
}
/* produce encoder homing frame if homed & input=decoder homing frame */
if ((pExt->reset_flag != 0) && (pExt->reset_flag_old != 0))
{
/* set homing sequence ( no need to decode anything */
for (int16 i = 0; i < AMR_WB_PCM_FRAME; i++)
{
pExt->pOutputBuffer[i] = EHF_MASK;
}
}
else
{
pExt->status = pvDecoder_AmrWb(pExt->mode,
pExt->pInputSampleBuffer,
pExt->pOutputBuffer,
&pExt->frameLength,
st,
pExt->frame_type,
ScratchMem);
}
for (int16 i = 0; i < AMR_WB_PCM_FRAME; i++) /* Delete the 2 LSBs (14-bit output) */
{
pExt->pOutputBuffer[i] &= 0xfffC;
}
/* if not homed: check whether current frame is a homing frame */
if (pExt->reset_flag_old == 0)
{
/* check whole frame */
pExt->reset_flag = pvDecoder_AmrWb_homing_frame_test(pExt->pInputSampleBuffer,
pExt->mode);
}
/* reset decoder if current frame is a homing frame */
if (pExt->reset_flag != 0)
{
pvDecoder_AmrWb_Reset(st, 1);;
}
pExt->reset_flag_old = pExt->reset_flag;
return pExt->status;
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
StopL
Stop decoder object.
Parameters: none
Return Values: none
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF void CDecoder_AMR_WB::StopL()
{
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
ResetDecoderL
Stop decoder object. Reset decoder.
Parameters: none
Return Values: status
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF int32 CDecoder_AMR_WB::ResetDecoderL()
{
pvDecoder_AmrWb_Reset(st, 1);
return 0;
}
/*
-----------------------------------------------------------------------------
CDecoder_AMR_WB
TerminateDecoderL
Stop decoder object. close decoder.
Parameters: none
Return Values: none
-----------------------------------------------------------------------------
*/
OSCL_EXPORT_REF void CDecoder_AMR_WB::TerminateDecoderL()
{
st = NULL;
ScratchMem = NULL;
if (pt_st != NULL)
{
OSCL_ARRAY_DELETE((uint8*)pt_st);
pt_st = NULL;
}
if (iInputBuf)
{
OSCL_ARRAY_DELETE(iInputBuf);
iInputBuf = NULL;
}
if (iOutputBuf)
{
OSCL_ARRAY_DELETE(iOutputBuf);
iOutputBuf = NULL;
}
if (iInputSampleBuf != NULL)
{
OSCL_ARRAY_DELETE(iInputSampleBuf);
iInputSampleBuf = NULL;
}
}