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Diffstat (limited to 'libSBRdec/src/env_extr.h')
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diff --git a/libSBRdec/src/env_extr.h b/libSBRdec/src/env_extr.h deleted file mode 100644 index 5db6d3d..0000000 --- a/libSBRdec/src/env_extr.h +++ /dev/null @@ -1,319 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -Software License for The Fraunhofer FDK AAC Codec Library for Android - -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. - - 1. INTRODUCTION -The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements -the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. -This FDK AAC Codec software is intended to be used on a wide variety of Android devices. - -AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual -audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by -independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part -of the MPEG specifications. - -Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) -may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners -individually for the purpose of encoding or decoding bit streams in products that are compliant with -the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license -these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec -software may already be covered under those patent licenses when it is used for those licensed purposes only. - -Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, -are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional -applications information and documentation. - -2. COPYRIGHT LICENSE - -Redistribution and use in source and binary forms, with or without modification, are permitted without -payment of copyright license fees provided that you satisfy the following conditions: - -You must retain the complete text of this software license in redistributions of the FDK AAC Codec or -your modifications thereto in source code form. - -You must retain the complete text of this software license in the documentation and/or other materials -provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. -You must make available free of charge copies of the complete source code of the FDK AAC Codec and your -modifications thereto to recipients of copies in binary form. - -The name of Fraunhofer may not be used to endorse or promote products derived from this library without -prior written permission. - -You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec -software or your modifications thereto. - -Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software -and the date of any change. For modified versions of the FDK AAC Codec, the term -"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term -"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." - -3. NO PATENT LICENSE - -NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, -ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with -respect to this software. - -You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized -by appropriate patent licenses. - -4. DISCLAIMER - -This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors -"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties -of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, -including but not limited to procurement of substitute goods or services; loss of use, data, or profits, -or business interruption, however caused and on any theory of liability, whether in contract, strict -liability, or tort (including negligence), arising in any way out of the use of this software, even if -advised of the possibility of such damage. - -5. CONTACT INFORMATION - -Fraunhofer Institute for Integrated Circuits IIS -Attention: Audio and Multimedia Departments - FDK AAC LL -Am Wolfsmantel 33 -91058 Erlangen, Germany - -www.iis.fraunhofer.de/amm -amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ - -/*! - \file - \brief Envelope extraction prototypes -*/ - -#ifndef __ENVELOPE_EXTRACTION_H -#define __ENVELOPE_EXTRACTION_H - -#include "sbrdecoder.h" - -#include "FDK_bitstream.h" -#include "lpp_tran.h" - -#include "psdec.h" - -#define ENV_EXP_FRACT 0 -/*!< Shift raw envelope data to support fractional numbers. - Can be set to 8 instead of 0 to enhance accuracy during concealment. - This is not required for conformance and #requantizeEnvelopeData() will - become more expensive. -*/ - -#define EXP_BITS 6 -/*!< Size of exponent-part of a pseudo float envelope value (should be at least 6). - The remaining bits in each word are used for the mantissa (should be at least 10). - This format is used in the arrays iEnvelope[] and sbrNoiseFloorLevel[] - in the FRAME_DATA struct which must fit in a certain part of the output buffer - (See buffer management in sbr_dec.cpp). - Exponents and mantissas could also be stored in separate arrays. - Accessing the exponent or the mantissa would be simplified and the masks #MASK_E - resp. #MASK_M would no longer be required. -*/ - -#define MASK_M (((1 << (FRACT_BITS - EXP_BITS)) - 1) << EXP_BITS) /*!< Mask for extracting the mantissa of a pseudo float envelope value */ -#define MASK_E ((1 << EXP_BITS) - 1) /*!< Mask for extracting the exponent of a pseudo float envelope value */ - -#define SIGN_EXT ( ((SCHAR)-1) ^ MASK_E) /*!< a CHAR-constant with all bits above our sign-bit set */ -#define ROUNDING ( (FIXP_SGL)(1<<(EXP_BITS-1)) ) /*!< 0.5-offset for rounding the mantissa of a pseudo-float envelope value */ -#define NRG_EXP_OFFSET 16 /*!< Will be added to the reference energy's exponent to prevent negative numbers */ -#define NOISE_EXP_OFFSET 38 /*!< Will be added to the noise level exponent to prevent negative numbers */ - -typedef enum -{ - HEADER_NOT_PRESENT, - HEADER_OK, - HEADER_RESET -} -SBR_HEADER_STATUS; - -typedef enum -{ - SBR_NOT_INITIALIZED, - UPSAMPLING, - SBR_HEADER, - SBR_ACTIVE -} -SBR_SYNC_STATE; - - -typedef enum -{ - COUPLING_OFF = 0, - COUPLING_LEVEL, - COUPLING_BAL -} -COUPLING_MODE; - -typedef struct -{ - UCHAR nSfb[2]; /*!< Number of SBR-bands for low and high freq-resolution */ - UCHAR nNfb; /*!< Actual number of noise bands to read from the bitstream*/ - UCHAR numMaster; /*!< Number of SBR-bands in v_k_master */ - UCHAR lowSubband; /*!< QMF-band where SBR frequency range starts */ - UCHAR highSubband; /*!< QMF-band where SBR frequency range ends */ - UCHAR limiterBandTable[MAX_NUM_LIMITERS+1]; /*!< Limiter band table. */ - UCHAR noLimiterBands; /*!< Number of limiter bands. */ - UCHAR nInvfBands; /*!< Number of bands for inverse filtering */ - UCHAR *freqBandTable[2]; /*!< Pointers to freqBandTableLo and freqBandTableHi */ - UCHAR freqBandTableLo[MAX_FREQ_COEFFS/2+1]; - /*!< Mapping of SBR bands to QMF bands for low frequency resolution */ - UCHAR freqBandTableHi[MAX_FREQ_COEFFS+1]; - /*!< Mapping of SBR bands to QMF bands for high frequency resolution */ - UCHAR freqBandTableNoise[MAX_NOISE_COEFFS+1]; - /*!< Mapping of SBR noise bands to QMF bands */ - UCHAR v_k_master[MAX_FREQ_COEFFS+1]; - /*!< Master BandTable which freqBandTable is derived from */ -} -FREQ_BAND_DATA; - -typedef FREQ_BAND_DATA *HANDLE_FREQ_BAND_DATA; - -#define SBRDEC_ELD_GRID 1 -#define SBRDEC_SYNTAX_SCAL 2 -#define SBRDEC_SYNTAX_USAC 4 -#define SBRDEC_SYNTAX_RSVD50 8 -#define SBRDEC_LOW_POWER 16 /* Flag indicating that Low Power QMF mode shall be used. */ -#define SBRDEC_PS_DECODED 32 /* Flag indicating that PS was decoded and rendered. */ -#define SBRDEC_LD_MPS_QMF 512 /* Flag indicating that the LD-MPS QMF shall be used. */ - -#define SBRDEC_HDR_STAT_RESET 1 -#define SBRDEC_HDR_STAT_UPDATE 2 - -typedef struct { - UCHAR ampResolution; /*!< Amplitude resolution of envelope values (0: 1.5dB, 1: 3dB) */ - UCHAR xover_band; /*!< Start index in #v_k_master[] used for dynamic crossover frequency */ - UCHAR sbr_preprocessing; /*!< SBR prewhitening flag. */ -} SBR_HEADER_DATA_BS_INFO; - -typedef struct { - /* Changes in these variables causes a reset of the decoder */ - UCHAR startFreq; /*!< Index for SBR start frequency */ - UCHAR stopFreq; /*!< Index for SBR highest frequency */ - UCHAR freqScale; /*!< 0: linear scale, 1-3 logarithmic scales */ - UCHAR alterScale; /*!< Flag for coarser frequency resolution */ - UCHAR noise_bands; /*!< Noise bands per octave, read from bitstream*/ - - /* don't require reset */ - UCHAR limiterBands; /*!< Index for number of limiter bands per octave */ - UCHAR limiterGains; /*!< Index to select gain limit */ - UCHAR interpolFreq; /*!< Select gain calculation method (1: per QMF channel, 0: per SBR band) */ - UCHAR smoothingLength; /*!< Smoothing of gains over time (0: on 1: off) */ - -} SBR_HEADER_DATA_BS; - -typedef struct -{ - SBR_SYNC_STATE syncState; /*!< The current initialization status of the header */ - - UCHAR status; /*!< Flags field used for signaling a reset right before the processing starts and an update from config (e.g. ASC). */ - UCHAR frameErrorFlag; /*!< Frame data valid flag. CAUTION: This variable will be overwritten by the flag stored in the element structure. - This is necessary because of the frame delay. There it might happen that different slots use the same header. */ - UCHAR numberTimeSlots; /*!< AAC: 16,15 */ - UCHAR numberOfAnalysisBands; /*!< Number of QMF analysis bands */ - UCHAR timeStep; /*!< Time resolution of SBR in QMF-slots */ - UINT sbrProcSmplRate; /*!< SBR processing sampling frequency (!= OutputSamplingRate) - (always: CoreSamplingRate * UpSamplingFactor; even in single rate mode) */ - - SBR_HEADER_DATA_BS bs_data; /*!< current SBR header. */ - SBR_HEADER_DATA_BS_INFO bs_info; /*!< SBR info. */ - - FREQ_BAND_DATA freqBandData; /*!< Pointer to struct #FREQ_BAND_DATA */ -} -SBR_HEADER_DATA; - -typedef SBR_HEADER_DATA *HANDLE_SBR_HEADER_DATA; - - -typedef struct -{ - UCHAR frameClass; /*!< Select grid type */ - UCHAR nEnvelopes; /*!< Number of envelopes */ - UCHAR borders[MAX_ENVELOPES+1]; /*!< Envelope borders (in SBR-timeslots, e.g. mp3PRO: 0..11) */ - UCHAR freqRes[MAX_ENVELOPES]; /*!< Frequency resolution for each envelope (0=low, 1=high) */ - SCHAR tranEnv; /*!< Transient envelope, -1 if none */ - UCHAR nNoiseEnvelopes; /*!< Number of noise envelopes */ - UCHAR bordersNoise[MAX_NOISE_ENVELOPES+1];/*!< borders of noise envelopes */ -} -FRAME_INFO; - - -typedef struct -{ - FIXP_SGL sfb_nrg_prev[MAX_FREQ_COEFFS]; /*!< Previous envelope (required for differential-coded values) */ - FIXP_SGL prevNoiseLevel[MAX_NOISE_COEFFS]; /*!< Previous noise envelope (required for differential-coded values) */ - COUPLING_MODE coupling; /*!< Stereo-mode of previous frame */ - INVF_MODE sbr_invf_mode[MAX_INVF_BANDS]; /*!< Previous strength of filtering in transposer */ - UCHAR ampRes; /*!< Previous amplitude resolution (0: 1.5dB, 1: 3dB) */ - UCHAR stopPos; /*!< Position in time where last envelope ended */ - UCHAR frameErrorFlag; /*!< Previous frame status */ -} -SBR_PREV_FRAME_DATA; - -typedef SBR_PREV_FRAME_DATA *HANDLE_SBR_PREV_FRAME_DATA; - - -typedef struct -{ - int nScaleFactors; /*!< total number of scalefactors in frame */ - - FRAME_INFO frameInfo; /*!< time grid for current frame */ - UCHAR domain_vec[MAX_ENVELOPES]; /*!< Bitfield containing direction of delta-coding for each envelope (0:frequency, 1:time) */ - UCHAR domain_vec_noise[MAX_NOISE_ENVELOPES]; /*!< Same as above, but for noise envelopes */ - - INVF_MODE sbr_invf_mode[MAX_INVF_BANDS]; /*!< Strength of filtering in transposer */ - COUPLING_MODE coupling; /*!< Stereo-mode */ - int ampResolutionCurrentFrame; /*!< Amplitude resolution of envelope values (0: 1.5dB, 1: 3dB) */ - - UCHAR addHarmonics[MAX_FREQ_COEFFS]; /*!< Flags for synthetic sine addition */ - - FIXP_SGL iEnvelope[MAX_NUM_ENVELOPE_VALUES]; /*!< Envelope data */ - FIXP_SGL sbrNoiseFloorLevel[MAX_NUM_NOISE_VALUES]; /*!< Noise envelope data */ -} -SBR_FRAME_DATA; - -typedef SBR_FRAME_DATA *HANDLE_SBR_FRAME_DATA; - -void initSbrPrevFrameData (HANDLE_SBR_PREV_FRAME_DATA h_prev_data, - int timeSlots); - - -int sbrGetSingleChannelElement (HANDLE_SBR_HEADER_DATA hHeaderData, - HANDLE_SBR_FRAME_DATA hFrameData, - HANDLE_FDK_BITSTREAM hBitBuf, - HANDLE_PS_DEC hParametricStereoDec, - const UINT flags, - const int overlap - ); - -int sbrGetChannelPairElement (HANDLE_SBR_HEADER_DATA hHeaderData, - HANDLE_SBR_FRAME_DATA hFrameDataLeft, - HANDLE_SBR_FRAME_DATA hFrameDataRight, - HANDLE_FDK_BITSTREAM hBitBuf, - const UINT flags, - const int overlap); - -SBR_HEADER_STATUS -sbrGetHeaderData (HANDLE_SBR_HEADER_DATA headerData, - HANDLE_FDK_BITSTREAM hBitBuf, - const UINT flags, - const int fIsSbrData); - -/*! - \brief Initialize SBR header data - - Copy default values to the header data struct and patch some entries - depending on the core codec. -*/ -SBR_ERROR -initHeaderData ( - HANDLE_SBR_HEADER_DATA hHeaderData, - const int sampleRateIn, - const int sampleRateOut, - const int samplesPerFrame, - const UINT flags - ); -#endif |