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Diffstat (limited to 'media/libstagefright/codecs/aacdec/pvmp4audiodecoderresetbuffer.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/pvmp4audiodecoderresetbuffer.cpp | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/pvmp4audiodecoderresetbuffer.cpp b/media/libstagefright/codecs/aacdec/pvmp4audiodecoderresetbuffer.cpp new file mode 100644 index 0000000..c10423b --- /dev/null +++ b/media/libstagefright/codecs/aacdec/pvmp4audiodecoderresetbuffer.cpp @@ -0,0 +1,354 @@ +/* ------------------------------------------------------------------ + * 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 */ + |