ref: 36ac51109224df99ad0e96609d37d126864f51ff
dir: /libfaad/syntax.h/
/* ** FAAD - Freeware Advanced Audio Decoder ** Copyright (C) 2002 M. Bakker ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ** ** $Id: syntax.h,v 1.3 2002/01/20 16:57:55 menno Exp $ **/ #ifndef __SYNTAX_H__ #define __SYNTAX_H__ #ifdef __cplusplus extern "C" { #endif #include "bits.h" #define MAIN 0 #define LC 1 #define SSR 2 #define LTP 3 /* Bitstream */ #define LEN_SE_ID 3 #define LEN_TAG 4 #define LEN_BYTE 8 #define EXT_FILL_DATA 1 #define EXT_DYNAMIC_RANGE 11 /* Syntax elements */ #define ID_SCE 0x0 #define ID_CPE 0x1 #define ID_CCE 0x2 #define ID_LFE 0x3 #define ID_DSE 0x4 #define ID_PCE 0x5 #define ID_FIL 0x6 #define ID_END 0x7 #define MAX_CHANNELS 64 #define MAX_SYNTAX_ELEMENTS 48 #define MAX_WINDOW_GROUPS 8 #define MAX_SFB 51 #define MAX_LTP_SFB 40 #define MAX_LTP_SFB_S 8 #define ONLY_LONG_SEQUENCE 0x0 #define LONG_START_SEQUENCE 0x1 #define EIGHT_SHORT_SEQUENCE 0x2 #define LONG_STOP_SEQUENCE 0x3 #define ZERO_HCB 0 #define FIRST_PAIR_HCB 5 #define ESC_HCB 11 #define QUAD_LEN 4 #define PAIR_LEN 2 #define NSPECBOOKS ESC_HCB + 1 #define BOOKSCL NSPECBOOKS #define NOISE_HCB 13 #define INTENSITY_HCB2 14 #define INTENSITY_HCB 15 typedef struct { int element_instance_tag; int object_type; int sf_index; int num_front_channel_elements; int num_side_channel_elements; int num_back_channel_elements; int num_lfe_channel_elements; int num_assoc_data_elements; int num_valid_cc_elements; int mono_mixdown_present; int mono_mixdown_element_number; int stereo_mixdown_present; int stereo_mixdown_element_number; int matrix_mixdown_idx_present; int pseudo_surround_enable; int matrix_mixdown_idx; int front_element_is_cpe[16]; int front_element_tag_select[16]; int side_element_is_cpe[16]; int side_element_tag_select[16]; int back_element_is_cpe[16]; int back_element_tag_select[16]; int lfe_element_tag_select[16]; int assoc_data_element_tag_select[16]; int cc_element_is_ind_sw[16]; int valid_cc_element_tag_select[16]; int channels; int comment_field_bytes; unsigned char comment_field_data[257]; } program_config; typedef struct { int syncword; int id; int layer; int protection_absent; int profile; int sf_index; int private_bit; int channel_configuration; int original; int home; int emphasis; int copyright_identification_bit; int copyright_identification_start; int aac_frame_length; int adts_buffer_fullness; int no_raw_data_blocks_in_frame; int crc_check; } adts_header; typedef struct { int copyright_id_present; char copyright_id[10]; int original_copy; int home; int bitstream_type; int bitrate; int num_program_config_elements; int adif_buffer_fullness; program_config pce; } adif_header; typedef struct { int last_band; int data_present; int lag; int coef; int short_used[8]; int short_lag_present[8]; int short_lag[8]; int long_used[51]; } ltp_info; typedef struct { int limit; int predictor_reset; int predictor_reset_group_number; int prediction_used[41]; } pred_info; typedef struct { int number_pulse; int pulse_start_sfb; int pulse_offset[4]; int pulse_amp[4]; } pulse_info; typedef struct { int n_filt[8]; int coef_res[8]; int length[8][4]; int order[8][4]; int direction[8][4]; int coef_compress[8][4]; int coef[8][4][32]; } tns_info; typedef struct { float ctrl1; float ctrl2; int present; int num_bands; int pce_instance_tag; int excluded_chns_present; int band_top[17]; int prog_ref_level; int dyn_rng_sgn[17]; int dyn_rng_ctl[17]; int exclude_mask[MAX_CHANNELS]; int additional_excluded_chns[MAX_CHANNELS]; } drc_info; typedef struct { int max_sfb; int num_swb; int num_window_groups; int num_windows; int window_sequence; int window_group_length[8]; int window_shape; int scale_factor_grouping; int sect_sfb_offset[8][15*8]; int swb_offset[51]; int sect_cb[8][15*8]; int sect_start[8][15*8]; int sect_end[8][15*8]; int sfb_cb[8][8*15]; int num_sec[8]; /* number of sections in a group */ int global_gain; int ms_mask_present; int ms_used[MAX_WINDOW_GROUPS][MAX_SFB]; int pulse_data_present; int tns_data_present; int gain_control_data_present; int predictor_data_present; int scale_factors[8][51]; pulse_info pul; tns_info tns; pred_info pred; ltp_info ltp; ltp_info ltp2; } ic_stream; /* individual channel stream */ typedef struct { int ele_id; int channel; int paired_channel; int element_instance_tag; int common_window; ic_stream ics1; ic_stream ics2; } element; /* syntax element (SCE, CPE, LFE) */ int GASpecificConfig(bitfile *ld, unsigned long *channelConfiguration); int single_lfe_channel_element(element *sce, bitfile *ld, short *spec_data, int sf_index, int object_type); int channel_pair_element(element *cpe, bitfile *ld, short *spec_data1, short *spec_data2, int sf_index, int object_type); int data_stream_element(bitfile *ld); int program_config_element(program_config *pce, bitfile *ld); int fill_element(bitfile *ld, drc_info *drc); int adts_frame(adts_header *adts, bitfile *ld); void get_adif_header(adif_header *adif, bitfile *ld); /* static functions */ static int individual_channel_stream(element *ele, bitfile *ld, ic_stream *ics, int scal_flag, short *spec_data, int sf_index, int object_type); static int ics_info(ic_stream *ics, bitfile *ld, int common_window, int fs_index, int object_type); static void section_data(ic_stream *ics, bitfile *ld); static int scale_factor_data(ic_stream *ics, bitfile *ld); static int spectral_data(ic_stream *ics, bitfile *ld, short *spectral_data); static int extension_payload(bitfile *ld, drc_info *drc, int count); static void pulse_data(pulse_info *pul, bitfile *ld); static void tns_data(ic_stream *ics, tns_info *tns, bitfile *ld); static void ltp_data(ic_stream *ics, ltp_info *ltp, bitfile *ld); static int adts_fixed_header(adts_header *adts, bitfile *ld); static void adts_variable_header(adts_header *adts, bitfile *ld); static void adts_error_check(adts_header *adts, bitfile *ld); static int dynamic_range_info(bitfile *ld, drc_info *drc); static int excluded_channels(bitfile *ld, drc_info *drc); #ifdef __cplusplus } #endif #endif