| /* ------------------------------------------------------------------ |
| * 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. |
| * ------------------------------------------------------------------- |
| */ |
| /* |
| |
| Filename: sbr_applied.c |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Who: Date: MM/DD/YYYY |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| INPUT |
| |
| SBRDECODER self, |
| SBRBITSTREAM * stream, |
| float *timeData, |
| int numChannels |
| |
| OUTPUT |
| |
| errorCode, noError if successful |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| sbr decoder processing, set up SBR decoder phase 2 in case of |
| different cotrol data |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| SC 29 Software Copyright Licencing Disclaimer: |
| |
| This software module was originally developed by |
| Coding Technologies |
| |
| and edited by |
| - |
| |
| in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 |
| standards for reference purposes and its performance may not have been |
| optimized. This software module is an implementation of one or more tools as |
| specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. |
| ISO/IEC gives users free license to this software module or modifications |
| thereof for use in products claiming conformance to audiovisual and |
| image-coding related ITU Recommendations and/or ISO/IEC International |
| Standards. ISO/IEC gives users the same free license to this software module or |
| modifications thereof for research purposes and further ISO/IEC standardisation. |
| Those intending to use this software module in products are advised that its |
| use may infringe existing patents. ISO/IEC have no liability for use of this |
| software module or modifications thereof. Copyright is not released for |
| products that do not conform to audiovisual and image-coding related ITU |
| Recommendations and/or ISO/IEC International Standards. |
| The original developer retains full right to modify and use the code for its |
| own purpose, assign or donate the code to a third party and to inhibit third |
| parties from using the code for products that do not conform to audiovisual and |
| image-coding related ITU Recommendations and/or ISO/IEC International Standards. |
| This copyright notice must be included in all copies or derivative works. |
| Copyright (c) ISO/IEC 2002. |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #ifdef AAC_PLUS |
| |
| |
| #include "sbr_applied.h" |
| #include "sbr_read_data.h" |
| |
| #include "sbr_decode_envelope.h" |
| #include "decode_noise_floorlevels.h" |
| #include "sbr_requantize_envelope_data.h" |
| #include "sbr_envelope_unmapping.h" |
| #include "sbr_dec.h" |
| #include "e_sbr_element_id.h" |
| #include "aac_mem_funcs.h" |
| |
| #ifdef PARAMETRICSTEREO |
| #include "ps_bstr_decoding.h" |
| #include "ps_allocate_decoder.h" |
| |
| #endif |
| |
| #include "init_sbr_dec.h" |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; 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 |
| ----------------------------------------------------------------------------*/ |
| |
| SBR_ERROR sbr_applied(SBRDECODER_DATA * self, |
| SBRBITSTREAM * stream, |
| Int16 *ch_left, |
| Int16 *ch_right, |
| Int16 *timeData, |
| SBR_DEC *sbrDec, |
| tDec_Int_File *pVars, |
| Int32 numChannels) |
| { |
| SBR_ERROR err = SBRDEC_OK ; |
| |
| Int32 eleChannels = 0; |
| |
| SBR_CHANNEL *SbrChannel = self->SbrChannel; |
| |
| /* Get SBR or PS Data only when available */ |
| if (stream->NrElements) |
| { |
| /* read frame data from bitstream */ |
| |
| err = sbr_read_data(self, |
| sbrDec, |
| stream); |
| |
| if (err != SBRDEC_OK) |
| { |
| /* |
| * This error condition disables any further SBR processing |
| */ |
| self->SbrChannel[LEFT].syncState = UPSAMPLING; |
| if (eleChannels == 2) |
| { |
| self->SbrChannel[RIGHT].syncState = UPSAMPLING; |
| } |
| } |
| |
| /* |
| * Setting bistream and decoding type is only done once, |
| */ |
| if (SbrChannel[LEFT].syncState == SBR_ACTIVE && self->setStreamType) |
| { |
| self->setStreamType = 0; /* Disable Lock for AAC stream type setting */ |
| |
| #ifdef HQ_SBR |
| #ifdef PARAMETRICSTEREO |
| |
| Int sbrEnablePS = self->hParametricStereoDec->psDetected; |
| |
| pVars->mc_info.psPresentFlag = sbrEnablePS; |
| |
| if (sbrEnablePS) /* Initialize PS arrays */ |
| { |
| pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_PS; |
| ps_allocate_decoder(self, 32); |
| |
| /* Disable LC (or Enable HQ) if PS is detected */ |
| sbrDec->LC_aacP_DecoderFlag = OFF; |
| } |
| else |
| { |
| /* |
| * Do not downgrade stream type from eaac+, if it has been explicitly declared |
| */ |
| if (pVars->mc_info.ExtendedAudioObjectType != MP4AUDIO_PS) |
| { |
| pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_SBR; |
| |
| if (pVars->mc_info.nch > 1) |
| { |
| sbrDec->LC_aacP_DecoderFlag = ON; /* Enable LC for stereo */ |
| } |
| else |
| { |
| sbrDec->LC_aacP_DecoderFlag = OFF; /* Disable LC, Enable HQ for mono */ |
| } |
| } |
| else |
| { |
| sbrEnablePS = 1; /* Force this condition as it was explicititly declared */ |
| pVars->mc_info.psPresentFlag = sbrEnablePS; |
| |
| } |
| } |
| #else |
| |
| pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_SBR; |
| |
| if (pVars->mc_info.nch > 1) |
| { |
| sbrDec->LC_aacP_DecoderFlag = ON; /* Enable LC for stereo */ |
| } |
| else |
| { |
| sbrDec->LC_aacP_DecoderFlag = OFF; /* Disable LC, Enable HQ for mono */ |
| } |
| #endif |
| |
| #else |
| pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_SBR; |
| |
| sbrDec->LC_aacP_DecoderFlag = ON; /* Enable LC for all sbr decoding */ |
| |
| #endif |
| |
| } /* (SbrChannel[LEFT].syncState == SBR_ACTIVE && lock) */ |
| else |
| { |
| /* |
| * Default setting for upsampler |
| */ |
| if (pVars->mc_info.ExtendedAudioObjectType == MP4AUDIO_AAC_LC) |
| { |
| /* |
| * Change only in implicit signalling, otherwise keep original declaration |
| */ |
| pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_SBR; |
| } |
| |
| #ifdef HQ_SBR |
| if (pVars->mc_info.nch > 1) |
| { |
| sbrDec->LC_aacP_DecoderFlag = ON; /* Enable LC for stereo */ |
| } |
| else |
| { |
| sbrDec->LC_aacP_DecoderFlag = OFF; /* Disable LC, Enable HQ for mono */ |
| } |
| #else |
| sbrDec->LC_aacP_DecoderFlag = ON; /* Enable LC for all sbr decoding */ |
| |
| #endif |
| /* mask error and let upsampler run */ |
| err = SBRDEC_OK; |
| |
| } |
| |
| /* decoding */ |
| eleChannels = (stream->sbrElement [LEFT].ElementID == SBR_ID_CPE) ? 2 : 1; |
| |
| if (SbrChannel[LEFT].syncState == SBR_ACTIVE) |
| { |
| |
| sbr_decode_envelope(&(SbrChannel[LEFT].frameData)); |
| |
| decode_noise_floorlevels(&(SbrChannel[LEFT].frameData)); |
| |
| if (! SbrChannel[LEFT].frameData.coupling) |
| { |
| sbr_requantize_envelope_data(&(SbrChannel[LEFT].frameData)); |
| } |
| |
| if (eleChannels == 2) |
| { |
| |
| sbr_decode_envelope(&(SbrChannel[RIGHT].frameData)); |
| |
| decode_noise_floorlevels(&(SbrChannel[RIGHT].frameData)); |
| |
| if (SbrChannel[RIGHT].frameData.coupling) |
| { |
| sbr_envelope_unmapping(&(SbrChannel[ LEFT].frameData), |
| &(SbrChannel[RIGHT].frameData)); |
| } |
| else |
| { |
| sbr_requantize_envelope_data(&(SbrChannel[RIGHT].frameData)); |
| } |
| } |
| } |
| else /* enable upsampling until valid SBR is obtained */ |
| { |
| /* |
| * Incomplete sbr frame, or disabled SBR section |
| * Set the decoder to act as a regular upsampler |
| */ |
| |
| init_sbr_dec((sbrDec->outSampleRate >> 1), |
| pVars->mc_info.upsamplingFactor, |
| sbrDec, |
| &(self->SbrChannel[LEFT].frameData)); |
| |
| if ((eleChannels == 2) && (SbrChannel[RIGHT].syncState != SBR_ACTIVE)) |
| { |
| init_sbr_dec((sbrDec->outSampleRate >> 1), |
| pVars->mc_info.upsamplingFactor, |
| sbrDec, |
| &(self->SbrChannel[RIGHT].frameData)); |
| |
| } |
| |
| } |
| |
| } |
| |
| |
| #ifdef HQ_SBR |
| #ifdef PARAMETRICSTEREO |
| if (pVars->mc_info.ExtendedAudioObjectType == MP4AUDIO_PS) |
| { |
| ps_bstr_decoding(self->hParametricStereoDec); |
| /* allocate pointer for rigth channel qmf filter history */ |
| Int16 *tempInt16Ptr = (Int16 *)SbrChannel[RIGHT].frameData.V; |
| self->hParametricStereoDec->R_ch_qmf_filter_history = (Int32 *)tempInt16Ptr; |
| |
| |
| /* |
| * 1824 (48*38) Int32 needed by each matrix sbrQmfBufferReal, sbrQmfBufferImag |
| * pVars->share.predictedSamples has 2048 available |
| * pVars->fxpCoef[1] has 2048 available |
| */ |
| SbrChannel[LEFT].frameData.sbrQmfBufferReal = pVars->share.predictedSamples; |
| SbrChannel[LEFT].frameData.sbrQmfBufferImag = &pVars->fxpCoef[0][920]; |
| |
| sbr_dec(ch_left, |
| timeData, |
| &(SbrChannel[LEFT].frameData), |
| (SbrChannel[LEFT].syncState == SBR_ACTIVE), |
| sbrDec, |
| &timeData[RIGHT], |
| self->hParametricStereoDec, |
| pVars); |
| } |
| else |
| { |
| #endif |
| #endif |
| |
| SbrChannel[LEFT].frameData.sbrQmfBufferReal = pVars->fxpCoef[LEFT]; |
| #ifdef HQ_SBR |
| SbrChannel[LEFT].frameData.sbrQmfBufferImag = pVars->fxpCoef[RIGHT]; |
| #endif |
| |
| sbr_dec(ch_left, |
| timeData, |
| &(SbrChannel[LEFT].frameData), |
| (SbrChannel[LEFT].syncState == SBR_ACTIVE), |
| sbrDec, |
| #ifdef HQ_SBR |
| #ifdef PARAMETRICSTEREO |
| NULL, |
| NULL, |
| #endif |
| #endif |
| pVars); |
| |
| if (numChannels == 2) |
| { |
| SbrChannel[RIGHT].frameData.sbrQmfBufferReal = pVars->fxpCoef[LEFT]; |
| #ifdef HQ_SBR |
| SbrChannel[RIGHT].frameData.sbrQmfBufferImag = pVars->fxpCoef[RIGHT]; |
| #endif |
| |
| sbr_dec(ch_right, |
| &timeData[RIGHT], |
| &(SbrChannel[RIGHT].frameData), |
| (SbrChannel[RIGHT].syncState == SBR_ACTIVE), |
| sbrDec, |
| #ifdef HQ_SBR |
| #ifdef PARAMETRICSTEREO |
| NULL, |
| NULL, |
| #endif |
| #endif |
| pVars); |
| |
| } |
| |
| |
| #ifdef HQ_SBR |
| #ifdef PARAMETRICSTEREO |
| } |
| #endif |
| #endif |
| |
| return err; |
| } |
| |
| |
| #endif |
| |
