yading@10: /* yading@10: * Spectral Band Replication definitions and structures yading@10: * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) yading@10: * Copyright (c) 2010 Alex Converse yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * Spectral Band Replication definitions and structures yading@10: * @author Robert Swain ( rob opendot cl ) yading@10: */ yading@10: yading@10: #ifndef AVCODEC_SBR_H yading@10: #define AVCODEC_SBR_H yading@10: yading@10: #include yading@10: #include "fft.h" yading@10: #include "aacps.h" yading@10: #include "sbrdsp.h" yading@10: yading@10: typedef struct AACContext AACContext; yading@10: yading@10: /** yading@10: * Spectral Band Replication header - spectrum parameters that invoke a reset if they differ from the previous header. yading@10: */ yading@10: typedef struct SpectrumParameters { yading@10: uint8_t bs_start_freq; yading@10: uint8_t bs_stop_freq; yading@10: uint8_t bs_xover_band; yading@10: yading@10: /** yading@10: * @name Variables associated with bs_header_extra_1 yading@10: * @{ yading@10: */ yading@10: uint8_t bs_freq_scale; yading@10: uint8_t bs_alter_scale; yading@10: uint8_t bs_noise_bands; yading@10: /** @} */ yading@10: } SpectrumParameters; yading@10: yading@10: #define SBR_SYNTHESIS_BUF_SIZE ((1280-128)*2) yading@10: yading@10: /** yading@10: * Spectral Band Replication per channel data yading@10: */ yading@10: typedef struct SBRData { yading@10: /** yading@10: * @name Main bitstream data variables yading@10: * @{ yading@10: */ yading@10: unsigned bs_frame_class; yading@10: unsigned bs_add_harmonic_flag; yading@10: unsigned bs_num_env; yading@10: uint8_t bs_freq_res[7]; yading@10: unsigned bs_num_noise; yading@10: uint8_t bs_df_env[5]; yading@10: uint8_t bs_df_noise[2]; yading@10: uint8_t bs_invf_mode[2][5]; yading@10: uint8_t bs_add_harmonic[48]; yading@10: unsigned bs_amp_res; yading@10: /** @} */ yading@10: yading@10: /** yading@10: * @name State variables yading@10: * @{ yading@10: */ yading@10: DECLARE_ALIGNED(32, float, synthesis_filterbank_samples)[SBR_SYNTHESIS_BUF_SIZE]; yading@10: DECLARE_ALIGNED(32, float, analysis_filterbank_samples) [1312]; yading@10: int synthesis_filterbank_samples_offset; yading@10: ///l_APrev and l_A yading@10: int e_a[2]; yading@10: ///Chirp factors yading@10: float bw_array[5]; yading@10: ///QMF values of the original signal yading@10: float W[2][32][32][2]; yading@10: ///QMF output of the HF adjustor yading@10: int Ypos; yading@10: DECLARE_ALIGNED(16, float, Y)[2][38][64][2]; yading@10: DECLARE_ALIGNED(16, float, g_temp)[42][48]; yading@10: float q_temp[42][48]; yading@10: uint8_t s_indexmapped[8][48]; yading@10: ///Envelope scalefactors yading@10: float env_facs[6][48]; yading@10: ///Noise scalefactors yading@10: float noise_facs[3][5]; yading@10: ///Envelope time borders yading@10: uint8_t t_env[8]; yading@10: ///Envelope time border of the last envelope of the previous frame yading@10: uint8_t t_env_num_env_old; yading@10: ///Noise time borders yading@10: uint8_t t_q[3]; yading@10: unsigned f_indexnoise; yading@10: unsigned f_indexsine; yading@10: /** @} */ yading@10: } SBRData; yading@10: yading@10: typedef struct SpectralBandReplication SpectralBandReplication; yading@10: yading@10: /** yading@10: * aacsbr functions pointers yading@10: */ yading@10: typedef struct AACSBRContext { yading@10: int (*sbr_lf_gen)(AACContext *ac, SpectralBandReplication *sbr, yading@10: float X_low[32][40][2], const float W[2][32][32][2], yading@10: int buf_idx); yading@10: void (*sbr_hf_assemble)(float Y1[38][64][2], yading@10: const float X_high[64][40][2], yading@10: SpectralBandReplication *sbr, SBRData *ch_data, yading@10: const int e_a[2]); yading@10: int (*sbr_x_gen)(SpectralBandReplication *sbr, float X[2][38][64], yading@10: const float Y0[38][64][2], const float Y1[38][64][2], yading@10: const float X_low[32][40][2], int ch); yading@10: void (*sbr_hf_inverse_filter)(SBRDSPContext *dsp, yading@10: float (*alpha0)[2], float (*alpha1)[2], yading@10: const float X_low[32][40][2], int k0); yading@10: } AACSBRContext; yading@10: yading@10: /** yading@10: * Spectral Band Replication yading@10: */ yading@10: struct SpectralBandReplication { yading@10: int sample_rate; yading@10: int start; yading@10: int reset; yading@10: SpectrumParameters spectrum_params; yading@10: int bs_amp_res_header; yading@10: /** yading@10: * @name Variables associated with bs_header_extra_2 yading@10: * @{ yading@10: */ yading@10: unsigned bs_limiter_bands; yading@10: unsigned bs_limiter_gains; yading@10: unsigned bs_interpol_freq; yading@10: unsigned bs_smoothing_mode; yading@10: /** @} */ yading@10: unsigned bs_coupling; yading@10: unsigned k[5]; ///< k0, k1, k2 yading@10: ///kx', and kx respectively, kx is the first QMF subband where SBR is used. yading@10: ///kx' is its value from the previous frame yading@10: unsigned kx[2]; yading@10: ///M' and M respectively, M is the number of QMF subbands that use SBR. yading@10: unsigned m[2]; yading@10: unsigned kx_and_m_pushed; yading@10: ///The number of frequency bands in f_master yading@10: unsigned n_master; yading@10: SBRData data[2]; yading@10: PSContext ps; yading@10: ///N_Low and N_High respectively, the number of frequency bands for low and high resolution yading@10: unsigned n[2]; yading@10: ///Number of noise floor bands yading@10: unsigned n_q; yading@10: ///Number of limiter bands yading@10: unsigned n_lim; yading@10: ///The master QMF frequency grouping yading@10: uint16_t f_master[49]; yading@10: ///Frequency borders for low resolution SBR yading@10: uint16_t f_tablelow[25]; yading@10: ///Frequency borders for high resolution SBR yading@10: uint16_t f_tablehigh[49]; yading@10: ///Frequency borders for noise floors yading@10: uint16_t f_tablenoise[6]; yading@10: ///Frequency borders for the limiter yading@10: uint16_t f_tablelim[30]; yading@10: unsigned num_patches; yading@10: uint8_t patch_num_subbands[6]; yading@10: uint8_t patch_start_subband[6]; yading@10: ///QMF low frequency input to the HF generator yading@10: DECLARE_ALIGNED(16, float, X_low)[32][40][2]; yading@10: ///QMF output of the HF generator yading@10: DECLARE_ALIGNED(16, float, X_high)[64][40][2]; yading@10: ///QMF values of the reconstructed signal yading@10: DECLARE_ALIGNED(16, float, X)[2][2][38][64]; yading@10: ///Zeroth coefficient used to filter the subband signals yading@10: DECLARE_ALIGNED(16, float, alpha0)[64][2]; yading@10: ///First coefficient used to filter the subband signals yading@10: DECLARE_ALIGNED(16, float, alpha1)[64][2]; yading@10: ///Dequantized envelope scalefactors, remapped yading@10: float e_origmapped[7][48]; yading@10: ///Dequantized noise scalefactors, remapped yading@10: float q_mapped[7][48]; yading@10: ///Sinusoidal presence, remapped yading@10: uint8_t s_mapped[7][48]; yading@10: ///Estimated envelope yading@10: float e_curr[7][48]; yading@10: ///Amplitude adjusted noise scalefactors yading@10: float q_m[7][48]; yading@10: ///Sinusoidal levels yading@10: float s_m[7][48]; yading@10: float gain[7][48]; yading@10: DECLARE_ALIGNED(32, float, qmf_filter_scratch)[5][64]; yading@10: FFTContext mdct_ana; yading@10: FFTContext mdct; yading@10: SBRDSPContext dsp; yading@10: AACSBRContext c; yading@10: }; yading@10: yading@10: #endif /* AVCODEC_SBR_H */