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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.
+ * -------------------------------------------------------------------
+ */
+/*
+
+ 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
+
generated by cgit v1.1 at 2024-05-29 15:41:34 +0000