sbr_dec.h
上传用户:xjjlds
上传日期:2015-12-05
资源大小:22823k
文件大小:7k
- /*
- ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
- ** Copyright (C) 2003-2005 M. Bakker, Ahead Software AG, http://www.nero.com
- **
- ** 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.
- **
- ** Any non-GPL usage of this software or parts of this software is strictly
- ** forbidden.
- **
- ** Software using this code must display the following message visibly in the
- ** software:
- ** "FAAD2 AAC/HE-AAC/HE-AACv2/DRM decoder (c) Ahead Software, www.nero.com"
- ** in, for example, the about-box or help/startup screen.
- **
- ** Commercial non-GPL licensing of this software is possible.
- ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
- **
- ** $Id: sbr_dec.h,v 1.3 2005/11/01 21:41:43 gabest Exp $
- **/
- #ifndef __SBR_DEC_H__
- #define __SBR_DEC_H__
- #ifdef __cplusplus
- extern "C" {
- #endif
- #ifdef PS_DEC
- #include "ps_dec.h"
- #endif
- #ifdef DRM_PS
- #include "drm_dec.h"
- #endif
- /* MAX_NTSRHFG: maximum of number_time_slots * rate + HFGen. 16*2+8 */
- #define MAX_NTSRHFG 40
- #define MAX_NTSR 32 /* max number_time_slots * rate, ok for DRM and not DRM mode */
- /* MAX_M: maximum value for M */
- #define MAX_M 49
- /* MAX_L_E: maximum value for L_E */
- #define MAX_L_E 5
- typedef struct {
- real_t *x;
- int16_t x_index;
- uint8_t channels;
- } qmfa_info;
- typedef struct {
- real_t *v;
- int16_t v_index;
- uint8_t channels;
- } qmfs_info;
- typedef struct
- {
- uint32_t sample_rate;
- uint32_t maxAACLine;
- uint8_t rate;
- uint8_t just_seeked;
- uint8_t ret;
- uint8_t amp_res[2];
- uint8_t k0;
- uint8_t kx;
- uint8_t M;
- uint8_t N_master;
- uint8_t N_high;
- uint8_t N_low;
- uint8_t N_Q;
- uint8_t N_L[4];
- uint8_t n[2];
- uint8_t f_master[64];
- uint8_t f_table_res[2][64];
- uint8_t f_table_noise[64];
- uint8_t f_table_lim[4][64];
- #ifdef SBR_LOW_POWER
- uint8_t f_group[5][64];
- uint8_t N_G[5];
- #endif
- uint8_t table_map_k_to_g[64];
- uint8_t abs_bord_lead[2];
- uint8_t abs_bord_trail[2];
- uint8_t n_rel_lead[2];
- uint8_t n_rel_trail[2];
- uint8_t L_E[2];
- uint8_t L_E_prev[2];
- uint8_t L_Q[2];
- uint8_t t_E[2][MAX_L_E+1];
- uint8_t t_Q[2][3];
- uint8_t f[2][MAX_L_E+1];
- uint8_t f_prev[2];
- real_t *G_temp_prev[2][5];
- real_t *Q_temp_prev[2][5];
- int8_t GQ_ringbuf_index[2];
- int16_t E[2][64][MAX_L_E];
- int16_t E_prev[2][64];
- #ifndef FIXED_POINT
- real_t E_orig[2][64][MAX_L_E];
- #endif
- real_t E_curr[2][64][MAX_L_E];
- int32_t Q[2][64][2];
- #ifndef FIXED_POINT
- real_t Q_div[2][64][2];
- real_t Q_div2[2][64][2];
- #endif
- int32_t Q_prev[2][64];
- int8_t l_A[2];
- int8_t l_A_prev[2];
- uint8_t bs_invf_mode[2][MAX_L_E];
- uint8_t bs_invf_mode_prev[2][MAX_L_E];
- real_t bwArray[2][64];
- real_t bwArray_prev[2][64];
- uint8_t noPatches;
- uint8_t patchNoSubbands[64];
- uint8_t patchStartSubband[64];
- uint8_t bs_add_harmonic[2][64];
- uint8_t bs_add_harmonic_prev[2][64];
- uint16_t index_noise_prev[2];
- uint8_t psi_is_prev[2];
- uint8_t bs_start_freq_prev;
- uint8_t bs_stop_freq_prev;
- uint8_t bs_xover_band_prev;
- uint8_t bs_freq_scale_prev;
- uint8_t bs_alter_scale_prev;
- uint8_t bs_noise_bands_prev;
- int8_t prevEnvIsShort[2];
- int8_t kx_prev;
- uint8_t bsco;
- uint8_t bsco_prev;
- uint8_t M_prev;
- uint16_t frame_len;
- uint8_t Reset;
- uint32_t frame;
- uint32_t header_count;
- uint8_t id_aac;
- qmfa_info *qmfa[2];
- qmfs_info *qmfs[2];
- qmf_t Xsbr[2][MAX_NTSRHFG][64];
- #ifdef DRM
- uint8_t Is_DRM_SBR;
- #ifdef DRM_PS
- drm_ps_info *drm_ps;
- #endif
- #endif
- uint8_t numTimeSlotsRate;
- uint8_t numTimeSlots;
- uint8_t tHFGen;
- uint8_t tHFAdj;
- #ifdef PS_DEC
- ps_info *ps;
- #endif
- #if (defined(PS_DEC) || defined(DRM_PS))
- uint8_t ps_used;
- #endif
- /* to get it compiling */
- /* we'll see during the coding of all the tools, whether
- these are all used or not.
- */
- uint8_t bs_header_flag;
- uint8_t bs_crc_flag;
- uint16_t bs_sbr_crc_bits;
- uint8_t bs_protocol_version;
- uint8_t bs_amp_res;
- uint8_t bs_start_freq;
- uint8_t bs_stop_freq;
- uint8_t bs_xover_band;
- uint8_t bs_freq_scale;
- uint8_t bs_alter_scale;
- uint8_t bs_noise_bands;
- uint8_t bs_limiter_bands;
- uint8_t bs_limiter_gains;
- uint8_t bs_interpol_freq;
- uint8_t bs_smoothing_mode;
- uint8_t bs_samplerate_mode;
- uint8_t bs_add_harmonic_flag[2];
- uint8_t bs_add_harmonic_flag_prev[2];
- uint8_t bs_extended_data;
- uint8_t bs_extension_id;
- uint8_t bs_extension_data;
- uint8_t bs_coupling;
- uint8_t bs_frame_class[2];
- uint8_t bs_rel_bord[2][9];
- uint8_t bs_rel_bord_0[2][9];
- uint8_t bs_rel_bord_1[2][9];
- uint8_t bs_pointer[2];
- uint8_t bs_abs_bord_0[2];
- uint8_t bs_abs_bord_1[2];
- uint8_t bs_num_rel_0[2];
- uint8_t bs_num_rel_1[2];
- uint8_t bs_df_env[2][9];
- uint8_t bs_df_noise[2][3];
- } sbr_info;
- sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac,
- uint32_t sample_rate, uint8_t downSampledSBR
- #ifdef DRM
- , uint8_t IsDRM
- #endif
- );
- void sbrDecodeEnd(sbr_info *sbr);
- void sbrReset(sbr_info *sbr);
- uint8_t sbrDecodeCoupleFrame(sbr_info *sbr, real_t *left_chan, real_t *right_chan,
- const uint8_t just_seeked, const uint8_t downSampledSBR);
- uint8_t sbrDecodeSingleFrame(sbr_info *sbr, real_t *channel,
- const uint8_t just_seeked, const uint8_t downSampledSBR);
- #if (defined(PS_DEC) || defined(DRM_PS))
- uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
- const uint8_t just_seeked, const uint8_t downSampledSBR);
- #endif
- #ifdef __cplusplus
- }
- #endif
- #endif