193 lines
6.3 KiB
C
193 lines
6.3 KiB
C
/* $Header: /cvs/root/winamp/vlb/DolbyPayload.h,v 1.1 2009/04/28 20:21:07 audiodsp Exp $ */
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/***************************************************************************\
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*
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* Copyright 2000-2002 Dolby Laboratories, Inc. All Rights
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* Reserved. Do not copy. Do not distribute.
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* Confidential information.
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*
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* filename: DolbyPayload.h
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* project : MPEG-2 AAC Decoder
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* contents/description: Dolby SE bitstream parser include file
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*
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\***************************************************************************/
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#ifndef _DolbyPayload_h_
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#define _DolbyPayload_h_
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//This is the quickest way to get all the Dolby Payload into the AAC Decoder but not the best!
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#include<math.h>
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#include<stdlib.h>
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#include<stdio.h>
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#include"bitstream.h"
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#define DSPmax(a,b) (((a) > (b)) ? (a) : (b));
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#define DSPmin(a,b) (((a) < (b)) ? (a) : (b));
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#define DNS
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#define SIGNAL_SUB
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#define DOLBY_MAX_NUM_SFB 64
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#define DOLBY_BLOCK_LEN_LONG 1024
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#define SS_BUF_LEN_LONG 150
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#define SS_BUF_LEN_SHORT 18
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#define SS_COPYSTART 50
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#define SS_STEP_LONG 10 /* note that SS_STEP_LONG must divide into SS_BUF_LEN_LONG without remainder,
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to assure that all values in normCopy array are power normalized.*/
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#define SS_STEP_SHORT 3 /* note that SS_STEP_SHORT must divide into SS_BUF_LEN_SHORT without remainder,
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to assure that all values in normCopy array are power normalized.*/
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#define GLOBAL_ATTEN 0.08f
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#define NS_ATTEN1_LONG 0.975f
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#define NS_ATTEN2_LONG 0.90f
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#define NS_ATTEN1_SHORT 0.90f /* 0.816 would be attenuation factor to apply same per octave attenuation as
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short block, but it is desireable to allow gentler rolloff for short blocks.
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Thus set to 0.90. */
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#define NS_ATTEN2_SHORT 0.7f /* To apply the same per octave attenuation as long block, the slope would
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be too sharp (greater than 6dB from bin to bin), thus allow a gentler slope
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for short blocks due to flat nature of short block spectra. */
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#define NSFILT_COEF 0.3f
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#define BACKWARD_MASK_COMP 0.95f
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#define START_BIN_LONG 50
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#define START_BIN_SHORT (START_BIN_LONG / 8)
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#define SE_MAX_NUM_BANDS 80
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#define MAX_NUM_POWER_VALUES SE_MAX_NUM_BANDS
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#define SE_BAND_IGNORE_BITS 3
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#define SE_NSHAPE_ORDER 2
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#define NOISE_LENGTH 10000
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#define NUM_BANDRES_OPTIONS 2
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#define SE_BANDRES_2_67_DB 0
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#define SE_BANDRES_1_33_DB 1
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#define NUM_BLOCKTYPES 4
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#define MAX_NUM_WINDOW_GROUPS 8
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#define SE_DNS_PWR_BITS_SHORT 3
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#define SE_DNS_PWR_BITS_LONG 4
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#define SE_SPECT_FLAT_BITS_LONG 8
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#define SE_SPECT_FLAT_BITS_SHORT 4
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#define SE_REF_ENERG_BITS_LONG 8
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#define SE_REF_ENERG_BITS_SHORT 7
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// buffer model control variables
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#define NEW_BUFFER_MODEL /* if #defined, uses the new buffer model which accounts for */
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/* frequency alignment between non-short and short frames */
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//#define DEBUG_PRINT_BUFFER_MODEL /* if #defined, prints out buffer model. Check the exact if statement */
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/* in the code to see whether or not the long or short buffer model is being printed out */
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#define USE_XFORM_HYSTERESIS
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#define XFORM_HYSTERESIS_LENGTH 2 /* Hysteresis for switching SE transform lengths. Relevant
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* only if USE_XFORM_HYSTERESIS is #define'd.
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* NOTE: Should be between 2 and (2 * NRDB per SE frame) inclusive or
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* even a clean switch (from single to double or vice-versa) will
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* elicit an unnecessary sound card close/re-open/glitch (twice).
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*/
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struct SECTION_INFORMATION_STRUCT{
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int aiSectionCount[MAX_NUM_WINDOW_GROUPS];
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int aaiSectionCodebooks[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
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int aaiSectionStart[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
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int aaiSectionEnd[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
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};
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struct DNS_INFORMATION_STRUCT{
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int iWindowSequence;
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int iGroupCount;
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int iGroupLength[MAX_NUM_WINDOW_GROUPS];
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int iMaxSFB;
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int iLastBin;
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const int *piBandOffsets;
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const SECTION_INFORMATION_STRUCT *psSectionInfoStruct;
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float aafDNSRatio[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
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};
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struct DOLBY_PAYLOAD_STRUCT{
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int iDolbyBitStreamWarning;
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int iUsesDoubleLengthXForm;
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int iSEPowerResolution;
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int iChannels;
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int iSampleRateIndex;
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int iSampleRate;
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int num_se_bands[2];
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int seBands[2][MAX_NUM_WINDOW_GROUPS][SE_MAX_NUM_BANDS];
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int sfm[2][MAX_NUM_WINDOW_GROUPS];
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int delta_power_values[2][MAX_NUM_WINDOW_GROUPS][MAX_NUM_POWER_VALUES];
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float fdamp[2][MAX_NUM_WINDOW_GROUPS];
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int SE_num_ignored_upper_bands[2];
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int aiMaxSFB[2];
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int aiTotalSFB[2];
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int aiCopyStop[2];
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int iGroupLength[2][MAX_NUM_WINDOW_GROUPS];
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int iGroupCount[2];
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DNS_INFORMATION_STRUCT asDNSInfoStruct[2];
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};
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struct Huffman
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{
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int index;
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int len;
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unsigned long cw;
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} ;
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struct Huffman_lookup
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{
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int index;
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int len;
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int cw;
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};
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typedef struct {
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unsigned int sr;
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unsigned int* SE_bands_bw;
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unsigned char SE_max_num_se_bands;
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unsigned char SE_num_ignored_upper_bands;
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} SE_Band_Info_struct;
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typedef struct {
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int powerResolution;
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Huffman* cwLengthLookupTable;
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Huffman_lookup* cwValueLookupTable;
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int num_codewords;
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} SE_power_resolution_table_struct;
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void applyDNS( float *pfSpectralData,
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DNS_INFORMATION_STRUCT*psDNSInfoStruct,
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int iPrevWnd);
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unsigned char computeSeBandInfo (unsigned int SRate, /* input: Sample Rate */
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unsigned int first_SE_bin, /* input: bin number of the first bin of the extension range */
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SE_Band_Info_struct* pSE_Band_Info_struct, /* input: SE band info struct ptr */
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int* SE_bands_bw, /* output: SE bandwidths, in bins (array; memory assumed to be already allocated) */
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int* num_SE_bands);
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int spectralExtInfo( int cnt,
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DOLBY_PAYLOAD_STRUCT *seData,
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CDolbyBitStream*poBitStream);
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void spectralExtend(float* pfData,
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int iCopyStart,
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int iCopyStop,
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int iSfm,
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int iBandCount,
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int* piBands,
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int* delta_power_values,
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float fDamp,
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int iHBlockSize,
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int wnd,
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int SEPowerResolution,
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int iPreviousWnd,
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float* avgCopyEnergies);
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void computeAvgCopyEnergies(float* pfData,
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int iCopyStart,
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int iCopyStop,
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int num_se_bands,
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int* piBands,
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int halfWindowLength,
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int iWindowSequence,
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float* avgCopyEnergies);
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#endif |