www.pudn.com > T-REC-G.722.1-200505-I!!SOFT-ZST-E.zip > defs.h
/*********************************************************************** ************************************************************************ ** ** ITU-T 7/14kHz Audio Coder Candidate (G.722.1 Annex C) Source Code ** ** © 2004 Polycom, Inc. ** ** All rights reserved. ** ************************************************************************ ***********************************************************************/ #include#include #include #include "typedef.h" #include "basop32.h" #define PI 3.141592653589793238462 #define MAX_DCT_LENGTH 640 #define DCT_LENGTH 320 #define DCT_LENGTH_DIV_2 160 #define DCT_LENGTH_DIV_4 80 #define DCT_LENGTH_DIV_8 40 #define DCT_LENGTH_DIV_16 20 #define DCT_LENGTH_DIV_32 10 #define DCT_LENGTH_DIV_64 5 #define MAX(a,b) (a > b ? a : b) #define MIN(a,b) (a < b ? a : b) #define NUM_CATEGORIES 8 #define NUM_CATEGORIZATION_CONTROL_BITS 4 #define NUM_CATEGORIZATION_CONTROL_POSSIBILITIES 16 #define CORE_SIZE 10 #define DCT_LENGTH_LOG 6 #define MAX_DCT_LENGTH_LOG 7 /* region_size = (BLOCK_SIZE * 0.875)/NUM_REGIONS; */ #define NUMBER_OF_REGIONS 14 #define MAX_NUMBER_OF_REGIONS 28 #define REGION_SIZE 20 #define NUMBER_OF_VALID_COEFS (NUMBER_OF_REGIONS * REGION_SIZE) #define MAX_NUMBER_OF_VALID_COEFS (MAX_NUMBER_OF_REGIONS * REGION_SIZE) #define REGION_POWER_TABLE_SIZE 64 #define REGION_POWER_TABLE_NUM_NEGATIVES 24 #define MAX_NUM_CATEGORIZATION_CONTROL_BITS 5 #define MAX_NUM_CATEGORIZATION_CONTROL_POSSIBILITIES 32 #define ENCODER_SCALE_FACTOR 18318.0 /* The MLT output is incorrectly scaled by the factor product of ENCODER_SCALE_FACTOR and sqrt(160.) This is now (9/30/96) 1.0/2^(4.5) or 1/22.627. In the current implementation this must be an integer power of sqrt(2). The integer power is ESF_ADJUSTMENT_TO_RMS_INDEX. The -2 is to conform with the range defined in the spec. */ #define ESF_ADJUSTMENT_TO_RMS_INDEX (9-2) #define INTERMEDIATE_FILES_FLAG 0 /* Max bit rate is 48000 bits/sec. */ #define MAX_BITS_PER_FRAME 960 /***************************************************************************/ /* Type definitions */ /***************************************************************************/ typedef struct { Word16 code_bit_count; /* bit count of the current word */ Word16 current_word; /* current word in the bitstream being processed */ Word16 *code_word_ptr; /* pointer to the bitstream */ Word16 number_of_bits_left; /* number of bits left in the current word */ Word16 next_bit; /* next bit in the current word */ }Bit_Obj; typedef struct { Word16 seed0; Word16 seed1; Word16 seed2; Word16 seed3; }Rand_Obj; /***************************************************************************/ /* Function definitions */ /***************************************************************************/ extern Word16 compute_region_powers(Word16 *mlt_coefs, Word16 mag_shift, Word16 *drp_num_bits, UWord16 *drp_code_bits, Word16 *absolute_region_power_index, Word16 number_of_regions); void vector_quantize_mlts(Word16 number_of_available_bits, Word16 number_of_regions, Word16 num_categorization_control_possibilities, Word16 *mlt_coefs, Word16 *absolute_region_power_index, Word16 *power_categories, Word16 *category_balances, Word16 *p_categorization_control, Word16 *region_mlt_bit_counts, UWord32 *region_mlt_bits); Word16 vector_huffman(Word16 category, Word16 power_index, Word16 *raw_mlt_ptr, UWord32 *word_ptr); void adjust_abs_region_power_index(Word16 *absolute_region_power_index,Word16 *mlt_coefs,Word16 number_of_regions); void bits_to_words(UWord32 *region_mlt_bits,Word16 *region_mlt_bit_counts, Word16 *drp_num_bits,UWord16 *drp_code_bits,Word16 *out_words, Word16 categorization_control, Word16 number_of_regions, Word16 num_categorization_control_bits, Word16 number_of_bits_per_frame); void encoder(Word16 number_of_available_bits, Word16 number_of_regions, Word16 *mlt_coefs, Word16 mag_shift, Word16 *out_words); void decoder(Bit_Obj *bitobj, Rand_Obj *randobj, Word16 number_of_regions, Word16 *decoder_mlt_coefs, Word16 *p_mag_shift, Word16 *p_old_mag_shift, Word16 *old_decoder_mlt_coefs, Word16 frame_error_flag); Word16 samples_to_rmlt_coefs(Word16 *new_samples,Word16 *history,Word16 *coefs,Word16 dct_length); void rmlt_coefs_to_samples(Word16 *coefs, Word16 *old_samples, Word16 *out_samples, Word16 dct_length, Word16 mag_shift); Word16 index_to_array(Word16 index,Word16 *array,Word16 category); void categorize(Word16 number_of_available_bits, Word16 number_of_regions, Word16 num_categorization_control_possibilities, Word16 *rms_index, Word16 *power_categories, Word16 *category_balances); Word16 calc_offset(Word16 *rms_index,Word16 number_of_regions,Word16 available_bits); void compute_raw_pow_categories(Word16 *power_categories,Word16 *rms_index,Word16 number_of_regions,Word16 offset); void comp_powercat_and_catbalance(Word16 *power_categories, Word16 *category_balances, Word16 *rms_index, Word16 number_of_available_bits, Word16 number_of_regions, Word16 num_categorization_control_possibilities, Word16 offset); void dct_type_iv_a (Word16 *input,Word16 *output,Word16 dct_length); void dct_type_iv_s(Word16 *input,Word16 *output,Word16 dct_length); void decode_envelope(Bit_Obj *bitobj, Word16 number_of_regions, Word16 *decoder_region_standard_deviation, Word16 *absolute_region_power_index, Word16 *p_mag_shift); void decode_vector_quantized_mlt_indices(Bit_Obj *bitobj, Rand_Obj *randobj, Word16 number_of_regions, Word16 *decoder_region_standard_deviation, Word16 *dedecoder_power_categories, Word16 *dedecoder_mlt_coefs); void rate_adjust_categories(Word16 categorization_control, Word16 *decoder_power_categories, Word16 *decoder_category_balances); void get_next_bit(Bit_Obj *bitobj); Word16 get_rand(Rand_Obj *randobj); void test_4_frame_errors(Bit_Obj *bitobj, Word16 number_of_regions, Word16 num_categorization_control_possibilities, Word16 *frame_error_flag, Word16 categorization_control, Word16 *absolute_region_power_index); void error_handling(Word16 number_of_coefs, Word16 number_of_valid_coefs, Word16 *frame_error_flag, Word16 *decoder_mlt_coefs, Word16 *old_decoder_mlt_coefs, Word16 *p_mag_shift, Word16 *p_old_mag_shift);