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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_applied.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_applied.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_applied.cpp b/media/libstagefright/codecs/aacdec/ps_applied.cpp new file mode 100644 index 0000000..77fd8a7 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_applied.cpp @@ -0,0 +1,216 @@ +/* ------------------------------------------------------------------ + * 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 + |