| /* ------------------------------------------------------------------ |
| * 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 */ |
| |
