206 lines
8 KiB
C
206 lines
8 KiB
C
/***********************************************************************
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**
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** ITU-T G.722.1 (2005-05) - Fixed point implementation for main body and Annex C
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** > Software Release 2.1 (2008-06)
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** (Simple repackaging; no change from 2005-05 Release 2.0 code)
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**
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** © 2004 Polycom, Inc.
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**
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** All rights reserved.
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**
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***********************************************************************/
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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#include "g7221/common/typedef.h"
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#include "g7221/common/basic_op.h"
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#define PI 3.141592653589793238462
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#define MAX_DCT_LENGTH 640
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#define DCT_LENGTH 320
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#define DCT_LENGTH_DIV_2 160
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#define DCT_LENGTH_DIV_4 80
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#define DCT_LENGTH_DIV_8 40
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#define DCT_LENGTH_DIV_16 20
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#define DCT_LENGTH_DIV_32 10
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#define DCT_LENGTH_DIV_64 5
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#define MAX(a,b) (a > b ? a : b)
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#define MIN(a,b) (a < b ? a : b)
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#define NUM_CATEGORIES 8
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#define NUM_CATEGORIZATION_CONTROL_BITS 4
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#define NUM_CATEGORIZATION_CONTROL_POSSIBILITIES 16
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#define CORE_SIZE 10
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#define DCT_LENGTH_LOG 6
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#define MAX_DCT_LENGTH_LOG 7
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/* region_size = (BLOCK_SIZE * 0.875)/NUM_REGIONS; */
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#define NUMBER_OF_REGIONS 14
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#define MAX_NUMBER_OF_REGIONS 28
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#define REGION_SIZE 20
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#define NUMBER_OF_VALID_COEFS (NUMBER_OF_REGIONS * REGION_SIZE)
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#define MAX_NUMBER_OF_VALID_COEFS (MAX_NUMBER_OF_REGIONS * REGION_SIZE)
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#define REGION_POWER_TABLE_SIZE 64
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#define REGION_POWER_TABLE_NUM_NEGATIVES 24
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#define MAX_NUM_CATEGORIZATION_CONTROL_BITS 5
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#define MAX_NUM_CATEGORIZATION_CONTROL_POSSIBILITIES 32
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#define ENCODER_SCALE_FACTOR 18318.0
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/* The MLT output is incorrectly scaled by the factor
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product of ENCODER_SCALE_FACTOR and sqrt(160.)
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This is now (9/30/96) 1.0/2^(4.5) or 1/22.627.
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In the current implementation this
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must be an integer power of sqrt(2). The
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integer power is ESF_ADJUSTMENT_TO_RMS_INDEX.
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The -2 is to conform with the range defined in the spec. */
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#define ESF_ADJUSTMENT_TO_RMS_INDEX (9-2)
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#define INTERMEDIATE_FILES_FLAG 0
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/* Max bit rate is 48000 bits/sec. */
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#define MAX_BITS_PER_FRAME 960
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/***************************************************************************/
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/* Type definitions */
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/***************************************************************************/
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typedef struct
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{
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Word16 code_bit_count; /* bit count of the current word */
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Word16 current_word; /* current word in the bitstream being processed */
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Word16 *code_word_ptr; /* pointer to the bitstream */
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Word16 number_of_bits_left; /* number of bits left in the current word */
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Word16 next_bit; /* next bit in the current word */
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}Bit_Obj;
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typedef struct
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{
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Word16 seed0;
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Word16 seed1;
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Word16 seed2;
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Word16 seed3;
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}Rand_Obj;
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/***************************************************************************/
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/* Function definitions */
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/***************************************************************************/
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extern Word16 compute_region_powers(Word16 *mlt_coefs,
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Word16 mag_shift,
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Word16 *drp_num_bits,
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UWord16 *drp_code_bits,
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Word16 *absolute_region_power_index,
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Word16 number_of_regions);
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void vector_quantize_mlts(Word16 number_of_available_bits,
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Word16 number_of_regions,
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Word16 num_categorization_control_possibilities,
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Word16 *mlt_coefs,
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Word16 *absolute_region_power_index,
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Word16 *power_categories,
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Word16 *category_balances,
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Word16 *p_categorization_control,
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Word16 *region_mlt_bit_counts,
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UWord32 *region_mlt_bits);
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Word16 vector_huffman(Word16 category,
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Word16 power_index,
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Word16 *raw_mlt_ptr,
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UWord32 *word_ptr);
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void adjust_abs_region_power_index(Word16 *absolute_region_power_index,Word16 *mlt_coefs,Word16 number_of_regions);
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void bits_to_words(UWord32 *region_mlt_bits,Word16 *region_mlt_bit_counts,
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Word16 *drp_num_bits,UWord16 *drp_code_bits,Word16 *out_words,
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Word16 categorization_control, Word16 number_of_regions,
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Word16 num_categorization_control_bits, Word16 number_of_bits_per_frame);
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void encoder(Word16 number_of_available_bits,
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Word16 number_of_regions,
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Word16 *mlt_coefs,
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Word16 mag_shift,
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Word16 *out_words);
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void decoder(Bit_Obj *bitobj,
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Rand_Obj *randobj,
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Word16 number_of_regions,
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Word16 *decoder_mlt_coefs,
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Word16 *p_mag_shift,
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Word16 *p_old_mag_shift,
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Word16 *old_decoder_mlt_coefs,
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Word16 frame_error_flag);
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Word16 samples_to_rmlt_coefs(const Word16 *new_samples,Word16 *history,Word16 *coefs,Word16 dct_length);
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void rmlt_coefs_to_samples(Word16 *coefs,
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Word16 *old_samples,
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Word16 *out_samples,
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Word16 dct_length,
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Word16 mag_shift);
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Word16 index_to_array(Word16 index,Word16 *array,Word16 category);
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void categorize(Word16 number_of_available_bits,
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Word16 number_of_regions,
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Word16 num_categorization_control_possibilities,
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Word16 *rms_index,
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Word16 *power_categories,
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Word16 *category_balances);
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Word16 calc_offset(Word16 *rms_index,Word16 number_of_regions,Word16 available_bits);
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void compute_raw_pow_categories(Word16 *power_categories,Word16 *rms_index,Word16 number_of_regions,Word16 offset);
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void comp_powercat_and_catbalance(Word16 *power_categories,
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Word16 *category_balances,
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Word16 *rms_index,
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Word16 number_of_available_bits,
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Word16 number_of_regions,
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Word16 num_categorization_control_possibilities,
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Word16 offset);
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void dct_type_iv_a (Word16 *input,Word16 *output,Word16 dct_length);
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void dct_type_iv_s(Word16 *input,Word16 *output,Word16 dct_length);
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void decode_envelope(Bit_Obj *bitobj,
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Word16 number_of_regions,
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Word16 *decoder_region_standard_deviation,
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Word16 *absolute_region_power_index,
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Word16 *p_mag_shift);
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void decode_vector_quantized_mlt_indices(Bit_Obj *bitobj,
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Rand_Obj *randobj,
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Word16 number_of_regions,
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Word16 *decoder_region_standard_deviation,
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Word16 *dedecoder_power_categories,
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Word16 *dedecoder_mlt_coefs);
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void rate_adjust_categories(Word16 categorization_control,
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Word16 *decoder_power_categories,
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Word16 *decoder_category_balances);
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void get_next_bit(Bit_Obj *bitobj);
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Word16 get_rand(Rand_Obj *randobj);
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void test_4_frame_errors(Bit_Obj *bitobj,
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Word16 number_of_regions,
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Word16 num_categorization_control_possibilities,
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Word16 *frame_error_flag,
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Word16 categorization_control,
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Word16 *absolute_region_power_index);
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void error_handling(Word16 number_of_coefs,
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Word16 number_of_valid_coefs,
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Word16 *frame_error_flag,
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Word16 *decoder_mlt_coefs,
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Word16 *old_decoder_mlt_coefs,
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Word16 *p_mag_shift,
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Word16 *p_old_mag_shift);
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