winamp/Src/vlb/DolbyPayload.h

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2024-09-24 12:54:57 +00:00
/* $Header: /cvs/root/winamp/vlb/DolbyPayload.h,v 1.1 2009/04/28 20:21:07 audiodsp Exp $ */
/***************************************************************************\
*
* Copyright 2000-2002 Dolby Laboratories, Inc. All Rights
* Reserved. Do not copy. Do not distribute.
* Confidential information.
*
* filename: DolbyPayload.h
* project : MPEG-2 AAC Decoder
* contents/description: Dolby SE bitstream parser include file
*
\***************************************************************************/
#ifndef _DolbyPayload_h_
#define _DolbyPayload_h_
//This is the quickest way to get all the Dolby Payload into the AAC Decoder but not the best!
#include<math.h>
#include<stdlib.h>
#include<stdio.h>
#include"bitstream.h"
#define DSPmax(a,b) (((a) > (b)) ? (a) : (b));
#define DSPmin(a,b) (((a) < (b)) ? (a) : (b));
#define DNS
#define SIGNAL_SUB
#define DOLBY_MAX_NUM_SFB 64
#define DOLBY_BLOCK_LEN_LONG 1024
#define SS_BUF_LEN_LONG 150
#define SS_BUF_LEN_SHORT 18
#define SS_COPYSTART 50
#define SS_STEP_LONG 10 /* note that SS_STEP_LONG must divide into SS_BUF_LEN_LONG without remainder,
to assure that all values in normCopy array are power normalized.*/
#define SS_STEP_SHORT 3 /* note that SS_STEP_SHORT must divide into SS_BUF_LEN_SHORT without remainder,
to assure that all values in normCopy array are power normalized.*/
#define GLOBAL_ATTEN 0.08f
#define NS_ATTEN1_LONG 0.975f
#define NS_ATTEN2_LONG 0.90f
#define NS_ATTEN1_SHORT 0.90f /* 0.816 would be attenuation factor to apply same per octave attenuation as
short block, but it is desireable to allow gentler rolloff for short blocks.
Thus set to 0.90. */
#define NS_ATTEN2_SHORT 0.7f /* To apply the same per octave attenuation as long block, the slope would
be too sharp (greater than 6dB from bin to bin), thus allow a gentler slope
for short blocks due to flat nature of short block spectra. */
#define NSFILT_COEF 0.3f
#define BACKWARD_MASK_COMP 0.95f
#define START_BIN_LONG 50
#define START_BIN_SHORT (START_BIN_LONG / 8)
#define SE_MAX_NUM_BANDS 80
#define MAX_NUM_POWER_VALUES SE_MAX_NUM_BANDS
#define SE_BAND_IGNORE_BITS 3
#define SE_NSHAPE_ORDER 2
#define NOISE_LENGTH 10000
#define NUM_BANDRES_OPTIONS 2
#define SE_BANDRES_2_67_DB 0
#define SE_BANDRES_1_33_DB 1
#define NUM_BLOCKTYPES 4
#define MAX_NUM_WINDOW_GROUPS 8
#define SE_DNS_PWR_BITS_SHORT 3
#define SE_DNS_PWR_BITS_LONG 4
#define SE_SPECT_FLAT_BITS_LONG 8
#define SE_SPECT_FLAT_BITS_SHORT 4
#define SE_REF_ENERG_BITS_LONG 8
#define SE_REF_ENERG_BITS_SHORT 7
// buffer model control variables
#define NEW_BUFFER_MODEL /* if #defined, uses the new buffer model which accounts for */
/* frequency alignment between non-short and short frames */
//#define DEBUG_PRINT_BUFFER_MODEL /* if #defined, prints out buffer model. Check the exact if statement */
/* in the code to see whether or not the long or short buffer model is being printed out */
#define USE_XFORM_HYSTERESIS
#define XFORM_HYSTERESIS_LENGTH 2 /* Hysteresis for switching SE transform lengths. Relevant
* only if USE_XFORM_HYSTERESIS is #define'd.
* NOTE: Should be between 2 and (2 * NRDB per SE frame) inclusive or
* even a clean switch (from single to double or vice-versa) will
* elicit an unnecessary sound card close/re-open/glitch (twice).
*/
struct SECTION_INFORMATION_STRUCT{
int aiSectionCount[MAX_NUM_WINDOW_GROUPS];
int aaiSectionCodebooks[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
int aaiSectionStart[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
int aaiSectionEnd[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
};
struct DNS_INFORMATION_STRUCT{
int iWindowSequence;
int iGroupCount;
int iGroupLength[MAX_NUM_WINDOW_GROUPS];
int iMaxSFB;
int iLastBin;
const int *piBandOffsets;
const SECTION_INFORMATION_STRUCT *psSectionInfoStruct;
float aafDNSRatio[MAX_NUM_WINDOW_GROUPS][DOLBY_MAX_NUM_SFB];
};
struct DOLBY_PAYLOAD_STRUCT{
int iDolbyBitStreamWarning;
int iUsesDoubleLengthXForm;
int iSEPowerResolution;
int iChannels;
int iSampleRateIndex;
int iSampleRate;
int num_se_bands[2];
int seBands[2][MAX_NUM_WINDOW_GROUPS][SE_MAX_NUM_BANDS];
int sfm[2][MAX_NUM_WINDOW_GROUPS];
int delta_power_values[2][MAX_NUM_WINDOW_GROUPS][MAX_NUM_POWER_VALUES];
float fdamp[2][MAX_NUM_WINDOW_GROUPS];
int SE_num_ignored_upper_bands[2];
int aiMaxSFB[2];
int aiTotalSFB[2];
int aiCopyStop[2];
int iGroupLength[2][MAX_NUM_WINDOW_GROUPS];
int iGroupCount[2];
DNS_INFORMATION_STRUCT asDNSInfoStruct[2];
};
struct Huffman
{
int index;
int len;
unsigned long cw;
} ;
struct Huffman_lookup
{
int index;
int len;
int cw;
};
typedef struct {
unsigned int sr;
unsigned int* SE_bands_bw;
unsigned char SE_max_num_se_bands;
unsigned char SE_num_ignored_upper_bands;
} SE_Band_Info_struct;
typedef struct {
int powerResolution;
Huffman* cwLengthLookupTable;
Huffman_lookup* cwValueLookupTable;
int num_codewords;
} SE_power_resolution_table_struct;
void applyDNS( float *pfSpectralData,
DNS_INFORMATION_STRUCT*psDNSInfoStruct,
int iPrevWnd);
unsigned char computeSeBandInfo (unsigned int SRate, /* input: Sample Rate */
unsigned int first_SE_bin, /* input: bin number of the first bin of the extension range */
SE_Band_Info_struct* pSE_Band_Info_struct, /* input: SE band info struct ptr */
int* SE_bands_bw, /* output: SE bandwidths, in bins (array; memory assumed to be already allocated) */
int* num_SE_bands);
int spectralExtInfo( int cnt,
DOLBY_PAYLOAD_STRUCT *seData,
CDolbyBitStream*poBitStream);
void spectralExtend(float* pfData,
int iCopyStart,
int iCopyStop,
int iSfm,
int iBandCount,
int* piBands,
int* delta_power_values,
float fDamp,
int iHBlockSize,
int wnd,
int SEPowerResolution,
int iPreviousWnd,
float* avgCopyEnergies);
void computeAvgCopyEnergies(float* pfData,
int iCopyStart,
int iCopyStop,
int num_se_bands,
int* piBands,
int halfWindowLength,
int iWindowSequence,
float* avgCopyEnergies);
#endif