ref: bc807920e3d52f57993e1dc34f9c0f23bb6847c0
dir: /aac_qc.h/
#ifndef AAC_QC_H
#define AAC_QC_H
#include "pulse.h"
#include "interface.h"
#include "tf_main.h"
#include "tns.h"
#include "all.h"
#ifdef __cplusplus
extern "C" {
#endif
/* assumptions for the first run of this quantizer */
#define CHANNEL 1
#define NUM_COEFF BLOCK_LEN_LONG /* now using BLOCK_LEN_LONG of block.h */
#define MAGIC_NUMBER 0.4054
#define MAX_QUANT 8192
#define SF_OFFSET 100
#define ABS(A) ((A) < 0 ? (-A) : (A))
#define sgn(A) ((A) > 0 ? (1) : (-1))
#define SFB_NUM_MAX MAX_SCFAC_BANDS /* now using MAX_SCFAC_BANDS of tf_main.h */
// Huffman tables
#define MAXINDEX 289
#define NUMINTAB 2
#define FIRSTINTAB 0
#define LASTINTAB 1
/*********************************************************/
/* AACQuantInfo, info for AAC quantization and coding. */
/*********************************************************/
typedef struct {
int max_sfb; /* max_sfb, should = nr_of_sfb/num_window_groups */
int nr_of_sfb; /* Number of scalefactor bands, interleaved */
int spectralCount; /* Number of spectral data coefficients */
enum WINDOW_TYPE block_type; /* Block type */
int scale_factor[SFB_NUM_MAX]; /* Scalefactor data array , interleaved */
int sfb_offset[250]; /* Scalefactor spectral offset, interleaved */
int book_vector[SFB_NUM_MAX]; /* Huffman codebook selected for each sf band */
int data[5*NUM_COEFF]; /* Data of spectral bitstream elements, for each spectral pair,
5 elements are required: 1*(esc)+2*(sign)+2*(esc value)=5 */
int len[5*NUM_COEFF]; /* Lengths of spectral bitstream elements */
int num_window_groups; /* Number of window groups */
int window_group_length
[MAX_SHORT_IN_LONG_BLOCK]; /* Length (in windows) of each window group */
int common_scalefac; /* Global gain */
Window_shape window_shape; /* Window shape parameter */
short pred_global_flag; /* Global prediction enable flag */
int pred_sfb_flag[SFB_NUM_MAX]; /* Prediction enable flag for each scalefactor band */
int reset_group_number; /* Prediction reset group number */
TNS_INFO* tnsInfo; /* Ptr to tns data */
AACPulseInfo pulseInfo;
} AACQuantInfo;
void PulseCoder(AACQuantInfo *quantInfo, int *quant);
void PulseDecoder(AACQuantInfo *quantInfo, int *quant);
int quantize(AACQuantInfo *quantInfo,
double *p_spectrum,
double *pow_spectrum,
int quant[NUM_COEFF]
);
void dequantize(AACQuantInfo *quantInfo,
double *p_spectrum,
int quant[NUM_COEFF],
double requant[NUM_COEFF],
double error_energy[SFB_NUM_MAX]
);
int count_bits(AACQuantInfo* quantInfo,
int quant[NUM_COEFF],
int output_book_vector[SFB_NUM_MAX*2]);
/*********************************************************/
/* tf_init_encode_spectrum_aac */
/*********************************************************/
void tf_init_encode_spectrum_aac( int quality );
/*********************************************************/
/* tf_encode_spectrum_aac */
/*********************************************************/
int tf_encode_spectrum_aac(
double *p_spectrum[MAX_TIME_CHANNELS],
double *SigMaksRatio[MAX_TIME_CHANNELS],
double allowed_dist[MAX_TIME_CHANNELS][MAX_SCFAC_BANDS],
double energy[MAX_TIME_CHANNELS][MAX_SCFAC_BANDS],
enum WINDOW_TYPE block_type[MAX_TIME_CHANNELS],
int sfb_width_table[MAX_TIME_CHANNELS][MAX_SCFAC_BANDS],
int nr_of_sfb[MAX_TIME_CHANNELS],
int average_block_bits,
int available_bitreservoir_bits,
int padding_limit,
BsBitStream *fixed_stream,
BsBitStream *var_stream,
int nr_of_chan,
double *p_reconstructed_spectrum[MAX_TIME_CHANNELS],
int useShortWindows,
int aacAllowScalefacs,
AACQuantInfo* quantInfo, /* AAC quantization information */
Ch_Info *ch_info,
int varBitRate,
int bitRate);
/*********************************************************/
/* sort_book_numbers */
/*********************************************************/
int sort_book_numbers(AACQuantInfo* quantInfo, /* Quantization information */
int output_book_vector[], /* Output codebook vector, formatted for bitstream */
BsBitStream* fixed_stream, /* Bitstream */
int write_flag); /* Write flag: 0 count, 1 write */
/*********************************************************/
/* sort_book_numbers */
/*********************************************************/
int sort_for_grouping(AACQuantInfo* quantInfo, /* ptr to quantization information */
int sfb_width_table[], /* Widths of single window */
double *p_spectrum[], /* Spectral values, noninterleaved */
double *SigMaskRatio,
double *PsySigMaskRatio);
/*********************************************************/
/* bit_search */
/*********************************************************/
int bit_search(int quant[NUM_COEFF], /* Quantized spectral values */
AACQuantInfo* quantInfo); /* Quantization information */
/*********************************************************/
/* noiseless_bit_count */
/*********************************************************/
int noiseless_bit_count(int quant[NUM_COEFF],
int hop,
int min_book_choice[112][3],
AACQuantInfo* quantInfo); /* Quantization information */
/*********************************************************/
/* output_bits */
/*********************************************************/
int output_bits(AACQuantInfo* quantInfo,
/*int huff[13][MAXINDEX][NUMINTAB],*/
int book, /* codebook */
int quant[NUM_COEFF],
int offset,
int length,
int write_flag);
/*********************************************************/
/* tf_init_decode_spectrum_aac */
/*********************************************************/
void tf_init_decode_spectrum_aac( long sampling_rate );
/*********************************************************/
/* tf_decode_spectrum_aac */
/*********************************************************/
int tf_decode_spectrum_aac(
double *p_spectrum[MAX_TIME_CHANNELS],
int block_type,
BsBitStream *fixed_stream,
BsBitStream *var_stream,
int nr_of_chan,
int bits_avail
);
/*********************************************************/
/* find_grouping_bits */
/*********************************************************/
int find_grouping_bits(int window_group_length[],
int num_window_groups
);
/*********************************************************/
/* write_scalefactor_bitstream */
/*********************************************************/
int write_scalefactor_bitstream(BsBitStream* fixed_stream, /* Bitstream */
int write_flag, /* Write flag */
AACQuantInfo* quantInfo); /* Quantization information */
#ifdef __cplusplus
}
#endif
#endif