| /*********************************************************************** |
| ** |
| ** ITU-T G.722.1 (2005-05) - Fixed point implementation for main body and Annex C |
| ** > Software Release 2.1 (2008-06) |
| ** (Simple repackaging; no change from 2005-05 Release 2.0 code) |
| ** |
| ** © 2004 Polycom, Inc. |
| ** |
| ** All rights reserved. |
| ** |
| ***********************************************************************/ |
| |
| #include <stdio.h> |
| #include <math.h> |
| #include <stdlib.h> |
| #include "g7221/common/typedef.h" |
| #include "g7221/common/basic_op.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(const 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); |
| |
| |