| /* ------------------------------------------------------------------ |
| * 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_applied.c |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Who: Date: MM/DD/YYYY |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Applies Parametric Stereo Tool to a QMF-analized mono signal |
| providing a stereo image as output |
| |
| |
| _______ ________ |
| | | _______ | | |
| ->|Hybrid | LF ---- | |->| Hybrid |--> |
| | Anal. | | | | | Synth | QMF -> L |
| ------- o----------------------->| | -------- Synth |
| QMF | s_k(n) |Stereo |--------------> |
| Anal. -------------------------->| | |
| _______ | | | | ________ |
| | | HF --o | ----------- |Process| | | |
| ->| Delay | | ->| |-------->| |->| Hybrid |--> |
| ------- | |decorrelate| d_k(n) | | | Synth | QMF -> R |
| ---->| |-------->| | -------- Synth |
| ----------- |_______|--------------> |
| |
| |
| ------------------------------------------------------------------------------ |
| 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 PARAMETRICSTEREO |
| #include "aac_mem_funcs.h" |
| #include "ps_stereo_processing.h" |
| #include "ps_decorrelate.h" |
| #include "ps_hybrid_synthesis.h" |
| #include "ps_hybrid_analysis.h" |
| #include "ps_applied.h" |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. Include conditional |
| ; compile variables also. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; 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 |
| ----------------------------------------------------------------------------*/ |
| |
| void ps_applied(STRUCT_PS_DEC *h_ps_dec, |
| Int32 rIntBufferLeft[][64], |
| Int32 iIntBufferLeft[][64], |
| Int32 *rIntBufferRight, |
| Int32 *iIntBufferRight, |
| Int32 scratch_mem[], |
| Int32 band) |
| |
| { |
| |
| /* |
| * Get higher frequency resolution in the lower QMF subbands |
| * creating sub-subbands |
| */ |
| ps_hybrid_analysis(rIntBufferLeft, |
| iIntBufferLeft, |
| h_ps_dec->mHybridRealLeft, |
| h_ps_dec->mHybridImagLeft, |
| h_ps_dec->hHybrid, |
| scratch_mem, |
| band); |
| |
| /* |
| * By means of delaying and all-pass filtering, sub-subbands of |
| * left ch. are decorrelate to creates right ch. sub-subbands |
| */ |
| |
| ps_decorrelate(h_ps_dec, |
| *rIntBufferLeft, |
| *iIntBufferLeft, |
| rIntBufferRight, |
| iIntBufferRight, |
| scratch_mem); |
| |
| /* |
| * sub-subbands of left and right ch. are processed according to |
| * stereo clues. |
| */ |
| |
| ps_stereo_processing(h_ps_dec, |
| *rIntBufferLeft, |
| *iIntBufferLeft, |
| rIntBufferRight, |
| iIntBufferRight); |
| |
| /* |
| * Reconstruct stereo signals |
| */ |
| |
| ps_hybrid_synthesis((const Int32*)h_ps_dec->mHybridRealLeft, |
| (const Int32*)h_ps_dec->mHybridImagLeft, |
| *rIntBufferLeft, |
| *iIntBufferLeft, |
| h_ps_dec->hHybrid); |
| |
| ps_hybrid_synthesis((const Int32*)h_ps_dec->mHybridRealRight, |
| (const Int32*)h_ps_dec->mHybridImagRight, |
| rIntBufferRight, |
| iIntBufferRight, |
| h_ps_dec->hHybrid); |
| |
| }/* END ps_applied */ |
| #endif |
| |
| |
| #endif |
| |
