diff options
Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_allocate_decoder.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_allocate_decoder.cpp | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_allocate_decoder.cpp b/media/libstagefright/codecs/aacdec/ps_allocate_decoder.cpp new file mode 100644 index 0000000..ab15651 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_allocate_decoder.cpp @@ -0,0 +1,341 @@ +/* ------------------------------------------------------------------ + * 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: ps_allocate_decoder.c + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Reuses AAC+ HQ right channel, which is not used when PS is enabled + +------------------------------------------------------------------------------ + 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 2003. + +------------------------------------------------------------------------------ + PSEUDO-CODE + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + +#ifdef AAC_PLUS + +#ifdef HQ_SBR + +#ifdef PARAMETRICSTEREO + +#include "s_sbr_channel.h" +#include "aac_mem_funcs.h" +#include "ps_hybrid_filter_bank_allocation.h" +#include "s_ps_dec.h" +#include "ps_all_pass_filter_coeff.h" +#include "ps_allocate_decoder.h" +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. Include conditional +; compile variables also. +----------------------------------------------------------------------------*/ + +#define R_SHIFT 30 +#define Q30_fmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F)) + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL STORE/BUFFER/POINTER DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ +const Int32 aRevLinkDelaySer[] = {3, 4, 5}; + +/*---------------------------------------------------------------------------- +; 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 +----------------------------------------------------------------------------*/ + +Int32 ps_allocate_decoder(SBRDECODER_DATA *self, + UInt32 noSubSamples) +{ + Int32 i, j; + Int32 status; + + Int32 *ptr1; + Int32 *ptr2; + Int32 *ptr3; + Int32 *ptr4; + Int32 *ptr5; + Int32 *ptr6; + Int32 *ptr7; + + const Int32 pHybridResolution[] = { HYBRID_8_CPLX, + HYBRID_2_REAL, + HYBRID_2_REAL + }; + + STRUCT_PS_DEC *h_ps_dec = self->hParametricStereoDec; + + /* initialisation */ + h_ps_dec->noSubSamples = noSubSamples; + + h_ps_dec->invNoSubSamples = Q30_fmt(1.0f) / noSubSamples; + + /* + * Reuse AAC+ HQ right channel, which is not used when PS is enabled + */ + ptr1 = (Int32 *)(self->SbrChannel[1].frameData.codecQmfBufferReal[0]); /* reuse un-used right channel QMF_FILTER Synthesis buffer */ + + ptr2 = (&ptr1[658]); /* reuse un-used right channel QMF_FILTER Synthesis buffer */ + /* 1162 - 658 = 504 + * = NO_QMF_ALLPASS_CHANNELS*2 (Re&Im)*( 3 + 4 + 5) + ( 3 + 4 + 5)*2 (Re&Im) + */ + + ptr3 = (&ptr1[1162]); /* reuse un-used right channel QMF_FILTER Synthesis buffer */ + /* 1426 - 1162 = 264 + * = SUBQMF_GROUPS*2 (Re&Im)*( 3 + 4 + 5) + ( 3 + 4 + 5)*2 (Re&Im) + */ + + ptr4 = (&ptr1[1426]); /* high freq generation buffers */ + + ptr5 = (&ptr1[1490]); /* high freq generation buffers */ + + ptr6 = (&ptr1[1618]); /* high freq generation buffers */ + + ptr7 = (&ptr1[1810]); /* high freq generation buffers */ + + /* whole allocation requires 1871 words, sbrQmfBufferImag has 1920 words */ + + + h_ps_dec->aPeakDecayFast = ptr1; + ptr1 += NO_BINS; + + h_ps_dec->aPrevNrg = ptr1; + ptr1 += NO_BINS; + + h_ps_dec->aPrevPeakDiff = ptr1; + ptr1 += NO_BINS; + + + + status = ps_hybrid_filter_bank_allocation(&h_ps_dec->hHybrid, + NO_QMF_CHANNELS_IN_HYBRID, + pHybridResolution, + &ptr1); + h_ps_dec->mHybridRealLeft = ptr1; + ptr1 += SUBQMF_GROUPS; + + h_ps_dec->mHybridImagLeft = ptr1; + ptr1 += SUBQMF_GROUPS; + + h_ps_dec->mHybridRealRight = ptr1; + ptr1 += SUBQMF_GROUPS; + + h_ps_dec->mHybridImagRight = ptr1; + ptr1 += SUBQMF_GROUPS; + + + h_ps_dec->delayBufIndex = 0; + + + + for (i = 0 ; i < NO_DELAY_CHANNELS ; i++) /* 41 */ + { + if (i < SHORT_DELAY_START) /* 12 */ + { + h_ps_dec->aNoSampleDelay[i] = LONG_DELAY; + } + else + { + h_ps_dec->aNoSampleDelay[i] = SHORT_DELAY; + } + } + + + h_ps_dec->aaRealDelayBufferQmf = (Int32 **)ptr6; + ptr6 += NO_QMF_ICC_CHANNELS * sizeof(Int32 *) / sizeof(Int32); + + h_ps_dec->aaImagDelayBufferQmf = (Int32 **)ptr7; + ptr7 += NO_QMF_ICC_CHANNELS * sizeof(Int32 *) / sizeof(Int32); + + h_ps_dec->aaRealDelayBufferSubQmf = (Int32 **)ptr1; + ptr1 += SUBQMF_GROUPS * sizeof(Int32 *) / sizeof(Int32); + + h_ps_dec->aaImagDelayBufferSubQmf = (Int32 **)ptr1; + ptr1 += SUBQMF_GROUPS * sizeof(Int32 *) / sizeof(Int32); + + for (i = 0; i < NO_QMF_ICC_CHANNELS; i++) /* 61 */ + { + int delay; + + if (i < NO_QMF_ALLPASS_CHANNELS) /* 20 */ + { + delay = 2; + h_ps_dec->aaRealDelayBufferQmf[i] = (Int32 *)ptr4; + ptr4 += delay; + + h_ps_dec->aaImagDelayBufferQmf[i] = (Int32 *)ptr5; + ptr5 += delay; + } + else + { + + if (i >= (NO_QMF_ALLPASS_CHANNELS + SHORT_DELAY_START)) + { + delay = SHORT_DELAY; + } + else + { + delay = LONG_DELAY; + } + + h_ps_dec->aaRealDelayBufferQmf[i] = (Int32 *)ptr1; + ptr1 += delay; + + h_ps_dec->aaImagDelayBufferQmf[i] = (Int32 *)ptr1; + ptr1 += delay; + } + } + + for (i = 0; i < SUBQMF_GROUPS; i++) + { + h_ps_dec->aaRealDelayBufferSubQmf[i] = (Int32 *)ptr1; + ptr1 += DELAY_ALLPASS; + + h_ps_dec->aaImagDelayBufferSubQmf[i] = (Int32 *)ptr1; + ptr1 += DELAY_ALLPASS; + + } + + for (i = 0 ; i < NO_SERIAL_ALLPASS_LINKS ; i++) /* NO_SERIAL_ALLPASS_LINKS == 3 */ + { + + h_ps_dec->aDelayRBufIndexSer[i] = 0; + + h_ps_dec->aaaRealDelayRBufferSerQmf[i] = (Int32 **)ptr2; + ptr2 += aRevLinkDelaySer[i]; + + h_ps_dec->aaaImagDelayRBufferSerQmf[i] = (Int32 **)ptr2; + ptr2 += aRevLinkDelaySer[i]; + + h_ps_dec->aaaRealDelayRBufferSerSubQmf[i] = (Int32 **)ptr3; + ptr3 += aRevLinkDelaySer[i]; + + h_ps_dec->aaaImagDelayRBufferSerSubQmf[i] = (Int32 **)ptr3; + ptr3 += aRevLinkDelaySer[i]; + + for (j = 0; j < aRevLinkDelaySer[i]; j++) + { + h_ps_dec->aaaRealDelayRBufferSerQmf[i][j] = ptr2; + ptr2 += NO_QMF_ALLPASS_CHANNELS; /* NO_QMF_ALLPASS_CHANNELS == 20 */ + + h_ps_dec->aaaImagDelayRBufferSerQmf[i][j] = ptr2; + ptr2 += NO_QMF_ALLPASS_CHANNELS; + + h_ps_dec->aaaRealDelayRBufferSerSubQmf[i][j] = ptr3; + ptr3 += SUBQMF_GROUPS; + + h_ps_dec->aaaImagDelayRBufferSerSubQmf[i][j] = ptr3; + ptr3 += SUBQMF_GROUPS; + + } + } + + + for (i = 0; i < NO_IID_GROUPS; i++) /* NO_IID_GROUPS == 22 */ + { + h_ps_dec->h11Prev[i] = Q30_fmt(1.0f); + h_ps_dec->h12Prev[i] = Q30_fmt(1.0f); + } + + + + return status; +} /*END CreatePsDec*/ +#endif + +#endif + + +#endif + |