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/* ------------------------------------------------------------------
* 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.
* -------------------------------------------------------------------
*/
/*
Pathname: PVMP4AudioDecoderResetBuffer.c
------------------------------------------------------------------------------
REVISION HISTORY
Description: (1) add more comments (2) set pVars->bno = 1
Description: perChan[] is an array of structures in tDec_Int_File. Made
corresponding changes.
Who: Date:
Description:
------------------------------------------------------------------------------
INPUT AND OUTPUT DEFINITIONS
Inputs:
pMem = void pointer to hide the internal implementation of the library
It is cast back to a tDec_Int_File structure. This structure
contains information that needs to persist between calls to
PVMP4AudioDecodeFrame
Data type void pointer, internally pointer to a tDec_Int_File
structure.
Local Stores/Buffers/Pointers Needed: None
(The memory set aside in pMem performs this task)
Global Stores/Buffers/Pointers Needed: None
Outputs: None
Pointers and Buffers Modified:
pMem contents are modified.
pMem->perChan[0].time_quant[0-1023]: contents are set to zero
pMem->perChan[1].time_quant[0-1023]: contents are set to zero
pMem->bno = 1
Local Stores Modified: None.
Global Stores Modified: None.
------------------------------------------------------------------------------
FUNCTION DESCRIPTION
This function is called when the same audio clip will be played again from
the begining. This situation happens when the "stop" button is pressed or
the "loop-mode" is selected on PVPlayer. Since it is the same audio clip to
be played again, the decoder does not need to reset the audioSpecificInfo.
However, the overlap-and-add buffer of the filterbank output needs to be
cleared, so that the decoder can re-start properly from the begining of
the audio. The frame number counter, pVars->bno, is set to 1 because the
audioSpecificInfo is decoded on pVars->bno==0
------------------------------------------------------------------------------
REQUIREMENTS
PacketVideo Document # CCC-AUD-AAC-ERS-0003
------------------------------------------------------------------------------
REFERENCES
(1) ISO/IEC 14496-3: 1999(E)
subclause 1.6
------------------------------------------------------------------------------
RESOURCES USED
When the code is written for a specific target processor the
the resources used should be documented below.
STACK USAGE: [stack count for this module] + [variable to represent
stack usage for each subroutine called]
where: [stack usage variable] = stack usage for [subroutine
name] (see [filename].ext)
DATA MEMORY USED: x words
PROGRAM MEMORY USED: x words
CLOCK CYCLES: [cycle count equation for this module] + [variable
used to represent cycle count for each subroutine
called]
where: [cycle count variable] = cycle count for [subroutine
name] (see [filename].ext)
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pv_audio_type_defs.h"
#include "s_tdec_int_file.h"
#include "pvmp4audiodecoder_api.h" /* Where this function is declared */
#include "aac_mem_funcs.h"
#ifdef AAC_PLUS
#include "s_sbr_frame_data.h"
#endif
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define LEFT (0)
#define RIGHT (1)
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; FUNCTION CODE
----------------------------------------------------------------------------*/
OSCL_EXPORT_REF void PVMP4AudioDecoderResetBuffer(void *pMem)
{
tDec_Int_File *pVars; /* Helper pointer */
#ifdef AAC_PLUS
SBR_FRAME_DATA * hFrameData_1;
SBR_FRAME_DATA * hFrameData_2;
#ifdef HQ_SBR
#ifdef PARAMETRICSTEREO
SBRDECODER_DATA *sbrDecoderData;
#endif
#endif
#endif
/*
* Initialize "helper" pointers to existing memory.
*/
pVars = (tDec_Int_File *)pMem;
/*
* Clear the overlap-and-add buffer of filterbank output. The audio
* clip will be played again from the beginning.
*/
pv_memset(pVars->perChan[LEFT].time_quant,
0,
LONG_WINDOW*sizeof(pVars->perChan[LEFT].time_quant[0]));
pv_memset(pVars->perChan[RIGHT].time_quant,
0,
LONG_WINDOW*sizeof(pVars->perChan[RIGHT].time_quant[0]));
#ifdef AAC_PLUS
if (!pVars->sbrDecoderData.setStreamType) /* reset only when stream type is defined */
{
if (pVars->aacPlusEnabled == true) /* clear buffer only if they were used */
{
hFrameData_1 = (SBR_FRAME_DATA *) & pVars->sbrDecoderData.SbrChannel[LEFT].frameData;
hFrameData_2 = (SBR_FRAME_DATA *) & pVars->sbrDecoderData.SbrChannel[RIGHT].frameData;
#ifdef HQ_SBR
#ifdef PARAMETRICSTEREO
sbrDecoderData = (SBRDECODER_DATA *) & pVars->sbrDecoderData;
sbrDecoderData->hParametricStereoDec = (HANDLE_PS_DEC) & pVars->sbrDecoderData.ParametricStereoDec;
#endif
#endif
pv_memset(&pVars->perChan[LEFT].ltp_buffer[0],
0,
288*sizeof(pVars->perChan[LEFT].ltp_buffer[0]));
pv_memset(&pVars->perChan[LEFT].ltp_buffer[1024 + 288],
0,
288*sizeof(pVars->perChan[LEFT].ltp_buffer[0]));
pv_memset(hFrameData_1->V,
0,
1152*sizeof(hFrameData_1->V[0]));
pv_memset(hFrameData_1->prevNoiseLevel_man,
0,
MAX_NUM_NOISE_VALUES*sizeof(hFrameData_1->prevNoiseLevel_man[0]));
pv_memset(&pVars->perChan[RIGHT].ltp_buffer[0],
0,
288*sizeof(pVars->perChan[RIGHT].ltp_buffer[0]));
pv_memset(&pVars->perChan[RIGHT].ltp_buffer[1024 + 288],
0,
288*sizeof(pVars->perChan[RIGHT].ltp_buffer[0]));
pv_memset(hFrameData_2->V,
0,
1152*sizeof(hFrameData_2->V[0]));
pv_memset(hFrameData_2->prevNoiseLevel_man,
0,
MAX_NUM_NOISE_VALUES*sizeof(hFrameData_2->prevNoiseLevel_man[0]));
int i;
for (i = 0; i < 8; i++)
{
pv_memset((void *)&hFrameData_1->codecQmfBufferReal[i],
0,
sizeof(**hFrameData_1->codecQmfBufferReal) << 5);
}
/* ---- */
pv_memset((void *)hFrameData_1->BwVectorOld,
0,
sizeof(*hFrameData_1->BwVectorOld)*MAX_NUM_PATCHES);
#ifdef HQ_SBR
for (i = 0; i < 5; i++)
{
pv_memset((void *)&hFrameData_1->fBuffer_man[i],
0,
sizeof(**hFrameData_1->fBuffer_man)*64);
pv_memset((void *)&hFrameData_1->fBufferN_man[i],
0,
sizeof(**hFrameData_1->fBufferN_man)*64);
}
#endif
/* ---- */
pv_memset((void *)hFrameData_1->HistsbrQmfBufferReal,
0,
sizeof(*hFrameData_1->HistsbrQmfBufferReal)*6*SBR_NUM_BANDS);
#ifdef HQ_SBR
pv_memset((void *)hFrameData_1->HistsbrQmfBufferImag,
0,
sizeof(*hFrameData_1->HistsbrQmfBufferImag)*6*SBR_NUM_BANDS);
#endif
if (pVars->sbrDec.LC_aacP_DecoderFlag == 1) /* clear buffer only for LC decoding */
{
for (i = 0; i < 8; i++)
{
pv_memset((void *)&hFrameData_2->codecQmfBufferReal[i],
0,
sizeof(**hFrameData_1->codecQmfBufferReal) << 5);
}
pv_memset((void *)hFrameData_2->HistsbrQmfBufferReal,
0,
sizeof(*hFrameData_2->HistsbrQmfBufferReal)*6*SBR_NUM_BANDS);
pv_memset((void *)hFrameData_2->BwVectorOld,
0,
sizeof(*hFrameData_2->BwVectorOld)*MAX_NUM_PATCHES);
#ifdef HQ_SBR
for (i = 0; i < 5; i++)
{
pv_memset((void *)&hFrameData_2->fBuffer_man[i],
0,
sizeof(**hFrameData_2->fBuffer_man)*64);
pv_memset((void *)&hFrameData_2->fBufferN_man[i],
0,
sizeof(**hFrameData_2->fBufferN_man)*64);
}
#endif
}
#ifdef HQ_SBR
#ifdef PARAMETRICSTEREO
else if (pVars->mc_info.psPresentFlag == 1)
{
for (i = 0; i < 3; i++)
{
pv_memset(sbrDecoderData->hParametricStereoDec->hHybrid->mQmfBufferReal[i],
0,
HYBRID_FILTER_LENGTH_m_1*sizeof(*sbrDecoderData->hParametricStereoDec->hHybrid->mQmfBufferReal));
pv_memset(sbrDecoderData->hParametricStereoDec->hHybrid->mQmfBufferImag[i],
0,
HYBRID_FILTER_LENGTH_m_1*sizeof(*sbrDecoderData->hParametricStereoDec->hHybrid->mQmfBufferImag));
}
}
#endif
#endif
/*
* default to UPSAMPLING, as if the file is SBR_ACTIVE, this will be fine and will be
* fixed onced the new sbr header is found
* SBR headers contain SBT freq. range as well as control signals that do not require
* frequent changes.
* For streaming, the SBR header is sent twice per second. Also, an SBR header can be
* inserted at any time, if a change of parameters is needed.
*/
pVars->sbrDecoderData.SbrChannel[LEFT].syncState = UPSAMPLING;
pVars->sbrDecoderData.SbrChannel[RIGHT].syncState = UPSAMPLING;
}
}
#endif /* #ifdef AAC_PLUS */
/* reset frame count to 1 */
pVars->bno = 1;
return ;
} /* PVMP4AudioDecoderDecodeFrame */
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