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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_all_pass_filter_coeff.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_all_pass_filter_coeff.cpp | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_all_pass_filter_coeff.cpp b/media/libstagefright/codecs/aacdec/ps_all_pass_filter_coeff.cpp new file mode 100644 index 0000000..48432f8 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_all_pass_filter_coeff.cpp @@ -0,0 +1,311 @@ +/* ------------------------------------------------------------------ + * 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_all_pass_filter_coeff.c + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Decorrelation is achieved by means of all-pass filtering + + + _______ ________ + | | _______ | | + ->|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 "pv_audio_type_defs.h" +#include "s_ps_dec.h" +#include "ps_all_pass_filter_coeff.h" +#include "ps_all_pass_fract_delay_filter.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 +----------------------------------------------------------------------------*/ + + +const Int16 aRevLinkDecaySerCoeff[NO_ALLPASS_CHANNELS][NO_SERIAL_ALLPASS_LINKS] = +{ + + + { Qfmt15(0.74915491616071f), Qfmt15(0.64942584030892f), Qfmt15(0.56297290849050f) }, + { Qfmt15(0.71658296328416f), Qfmt15(0.62118993420853f), Qfmt15(0.53849582551265f) }, + { Qfmt15(0.68401101040761f), Qfmt15(0.59295402810815f), Qfmt15(0.51401874253480f) }, + { Qfmt15(0.65143905753106f), Qfmt15(0.56471812200776f), Qfmt15(0.97908331911390f) }, /* 3 */ + { Qfmt15(0.61886710465450f), Qfmt15(0.53648221590737f), Qfmt15(0.93012915315822f) }, + { Qfmt15(0.58629515177795f), Qfmt15(0.50824630980698f), Qfmt15(0.88117498720252f) }, + { Qfmt15(0.55372319890140f), Qfmt15(0.48001040370660f), Qfmt15(0.83222082124682f) }, + { Qfmt15(0.52115124602484f), Qfmt15(0.45177449760621f), Qfmt15(0.78326665529112f) }, + { Qfmt15(0.48857929314829f), Qfmt15(0.42353859150582f), Qfmt15(0.73431248933542f) }, + { Qfmt15(0.45600734027174f), Qfmt15(0.39530268540543f), Qfmt15(0.68535832337974f) }, + { Qfmt15(0.42343538739519f), Qfmt15(0.36706677930504f), Qfmt15(0.63640415742404f) }, + { Qfmt15(0.39086343451863f), Qfmt15(0.33883087320466f), Qfmt15(0.58744999146834f) }, + { Qfmt15(0.35829148164208f), Qfmt15(0.31059496710427f), Qfmt15(0.53849582551265f) }, + { Qfmt15(0.32571952876553f), Qfmt15(0.28235906100388f), Qfmt15(0.48954165955695f) }, + { Qfmt15(0.29314757588898f), Qfmt15(0.25412315490349f), Qfmt15(0.44058749360126f) }, + { Qfmt15(0.26057562301242f), Qfmt15(0.22588724880310f), Qfmt15(0.39163332764556f) }, + { Qfmt15(0.22800367013587f), Qfmt15(0.19765134270272f), Qfmt15(0.34267916168986f) }, + { Qfmt15(0.19543171725932f), Qfmt15(0.16941543660233f), Qfmt15(0.29372499573418f) }, + { Qfmt15(0.16285976438276f), Qfmt15(0.14117953050194f), Qfmt15(0.24477082977848f) }, + { Qfmt15(0.13028781150621f), Qfmt15(0.11294362440155f), Qfmt15(0.19581666382278f) }, + { Qfmt15(0.09771585862966f), Qfmt15(0.08470771830116f), Qfmt15(0.14686249786708f) }, + { Qfmt15(0.06514390575311f), Qfmt15(0.05647181220078f), Qfmt15(0.09790833191140f) }, + { Qfmt15(0.03257195287655f), Qfmt15(0.02823590610039f), Qfmt15(0.04895416595570f) } + +}; + + + + + +const Char groupBorders[NO_IID_GROUPS + 1] = +{ + 4, 5, 0, 1, 2, 3, 7, 6, 8, 9, 3, 4, + 5, 6, 7, 8, 9, 11, 14, 18, 23, 35, 64 +}; + +const Char bins2groupMap[NO_IID_GROUPS] = +{ + 1, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 +}; + + + + +/* + * q_phi = 0.39 + * + * cos(pi*([3:22]+0.5)*q_phi) + */ + + +/* + * sin(-pi*([3:22]+0.5)*q_phi) + */ + + +const Int32 aFractDelayPhaseFactor[NO_QMF_ALLPASS_CHANNELS] = +{ + 0xCB5474A9, 0x5BEC5914, 0x72F3C7B0, 0xF1F480C6, 0x8389E21E, + 0xB9BA6AFC, 0x4CDB665C, 0x7A57DA5D, 0x06088024, 0x89BECF04, + 0xA9DB5EAC, 0x3BE5711F, 0x7EB9EDF7, 0x19F582A9, 0x92DDBD1F, + 0x9C1B5008, 0x29767919, 0x7FFC0203, 0x2D3F8843, 0x9EABACDF +}; + +/* + * q(m) = { 0.43, 0.75, 0.347 } + * + * cos(pi*([3:22]+0.5)*q(m)) cos(pi*([3:22]+0.5)'*q) + * + * sin(-pi*([3:22]+0.5)*q(m)) + * + */ + + +const Int32 aaFractDelayPhaseFactorSerQmf[NO_QMF_ALLPASS_CHANNELS][3] = +{ + { 0x02037FFC, 0xCF0489BE, 0x9BFB4FE0 }, + { 0x7D5719F5, 0xCF047642, 0x18947D9E }, + { 0x34AD8B57, 0x7642CF04, 0x7ABF244A }, + { 0x99A4B325, 0x89BECF04, 0x58EFA3F1 }, + { 0x9EAB5321, 0x30FC7642, 0xD77E8694 }, + { 0x3BE5711F, 0x30FC89BE, 0x819CEBC7 }, + { 0x7B77DE39, 0x89BE30FC, 0xB3A166B8 }, + { 0xF9F88024, 0x764230FC, 0x37C57336 }, + { 0x81E8E9FE, 0xCF0489BE, 0x7FF103D2 }, + { 0xCF047642, 0xCF047642, 0x3E8B9052 }, + { 0x68B9499A, 0x7642CF04, 0xB9E594E8 }, + { 0x5EACA9DB, 0x89BECF04, 0x80A00CA5 }, + { 0xC09590D1, 0x30FC7642, 0xD05276CA }, + { 0x85A925A3, 0x30FC89BE, 0x53486134 }, + { 0x0A0B7F9B, 0x89BE30FC, 0x7CB2E319 }, + { 0x7EB91209, 0x764230FC, 0x20078412 }, + { 0x2D3F8843, 0xCF0489BE, 0xA0ECAA4D }, + { 0x9504B9BA, 0xCF047642, 0x880D2CAE }, + { 0xA4145914, 0x7642CF04, 0xF0287F04 }, + { 0x42E16D23, 0x89BECF04, 0x694C48C7 } +}; + +/* + * Fractional delay vector + * + * phi_fract(k) = exp(-j*pi*q_phi*f_center(k)) 0<= k <= SUBQMF_GROUPS + * + * q_phi = 0.39 + * f_center(k) frequency vector + * + * + * f_center(k) = {0.5/4, 1.5/4, 2.5/4, 3.5/4, + * -1.5/4, -0.5/4, + * 3.5/2, 2.5/2, 4.5/2, 5.5/2}; + */ + + + +const Int32 aFractDelayPhaseFactorSubQmf[SUBQMF_GROUPS] = +{ + 0x7E80EC79, 0x72BAC73D, 0x5C45A749, 0x3D398F97, 0x72BA38C3, + 0x7E801387, 0xBA919478, 0x05068019, 0x895DCFF2, 0x834E1CE7, +}; + + + + + +/* + * Fractional delay length matrix + * + * Q_fract(k,m) = exp(-j*pi*q(m)*f_center(k)) + * + * q(m) = { 0.43, 0.75, 0.347 } + * f_center(k) frequency vector + * + * + * f_center(k) = { 0.5/4, 1.5/4, 2.5/4, 3.5/4, + * -1.5/4, -0.5/4, + * 3.5/2, 2.5/2, 4.5/2, 5.5/2}; + */ + +const Int32 aaFractDelayPhaseFactorSerSubQmf[SUBQMF_GROUPS][3] = +{ + + { 0x7E2EEA7D, 0x7A7DDAD8, 0x7ED0EE9D }, + { 0x6FEDC1E5, 0x51349D0E, 0x7574CD1E }, + { 0x5506A052, 0x0C8C809E, 0x636CAF62 }, + { 0x3085898D, 0xC3A98F1D, 0x4A0D9799 }, + { 0x6FED3E1B, 0x513462F2, 0x757432E2 }, + { 0x7E2E1583, 0x7A7D2528, 0x7ED01163 }, + { 0xA4C8A634, 0xB8E36A6E, 0xD5AF8732 }, + { 0xF0F580E3, 0x8276E707, 0x1A7382C3 }, + { 0x80ABF2F4, 0x471D6A6E, 0x9D2FAEA4 }, + { 0x9478456F, 0x7D8AE707, 0x8152EDAB } +}; + + +/*---------------------------------------------------------------------------- +; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; FUNCTION CODE +----------------------------------------------------------------------------*/ + +#endif + + +#endif + |