Index: patched-ffmpeg-mt/libavcodec/sbr.h |
=================================================================== |
--- patched-ffmpeg-mt/libavcodec/sbr.h (revision 0) |
+++ patched-ffmpeg-mt/libavcodec/sbr.h (revision 0) |
@@ -0,0 +1,187 @@ |
+/* |
+ * Spectral Band Replication definitions and structures |
+ * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) |
+ * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> |
+ * |
+ * This file is part of FFmpeg. |
+ * |
+ * FFmpeg is free software; you can redistribute it and/or |
+ * modify it under the terms of the GNU Lesser General Public |
+ * License as published by the Free Software Foundation; either |
+ * version 2.1 of the License, or (at your option) any later version. |
+ * |
+ * FFmpeg 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 |
+ * Lesser General Public License for more details. |
+ * |
+ * You should have received a copy of the GNU Lesser General Public |
+ * License along with FFmpeg; if not, write to the Free Software |
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
+ */ |
+ |
+/** |
+ * @file libavcodec/sbr.h |
+ * Spectral Band Replication definitions and structures |
+ * @author Robert Swain ( rob opendot cl ) |
+ */ |
+ |
+#ifndef AVCODEC_SBR_H |
+#define AVCODEC_SBR_H |
+ |
+#include <stdint.h> |
+#include "fft.h" |
+ |
+/** |
+ * Spectral Band Replication header - spectrum parameters that invoke a reset if they differ from the previous header. |
+ */ |
+typedef struct { |
+ uint8_t bs_start_freq; |
+ uint8_t bs_stop_freq; |
+ uint8_t bs_xover_band; |
+ |
+ /** |
+ * @defgroup bs_header_extra_1 Variables associated with bs_header_extra_1 |
+ * @{ |
+ */ |
+ uint8_t bs_freq_scale; |
+ uint8_t bs_alter_scale; |
+ uint8_t bs_noise_bands; |
+ /** @} */ |
+} SpectrumParameters; |
+ |
+#define SBR_SYNTHESIS_BUF_SIZE ((1280-128)*2) |
+ |
+/** |
+ * Spectral Band Replication per channel data |
+ */ |
+typedef struct { |
+ /** |
+ * @defgroup bitstream Main bitstream data variables |
+ * @{ |
+ */ |
+ unsigned bs_frame_class; |
+ unsigned bs_add_harmonic_flag; |
+ unsigned bs_num_env[2]; |
+ uint8_t bs_freq_res[7]; |
+ uint8_t bs_var_bord[2]; |
+ uint8_t bs_num_rel[2]; |
+ uint8_t bs_rel_bord[2][3]; |
+ unsigned bs_pointer; |
+ unsigned bs_num_noise; |
+ uint8_t bs_df_env[5]; |
+ uint8_t bs_df_noise[2]; |
+ uint8_t bs_invf_mode[2][5]; |
+ uint8_t bs_add_harmonic[48]; |
+ unsigned bs_amp_res; |
+ /** @} */ |
+ |
+ /** |
+ * @defgroup state State variables |
+ * @{ |
+ */ |
+ DECLARE_ALIGNED(16, float, synthesis_filterbank_samples)[SBR_SYNTHESIS_BUF_SIZE]; |
+ DECLARE_ALIGNED(16, float, analysis_filterbank_samples) [1312]; |
+ int synthesis_filterbank_samples_offset; |
+ ///l_APrev and l_A |
+ int e_a[2]; |
+ ///Chirp factors |
+ float bw_array[5]; |
+ ///QMF values of the original signal |
+ float W[2][32][32][2]; |
+ ///QMF output of the HF adjustor |
+ float Y[2][38][64][2]; |
+ float g_temp[42][48]; |
+ float q_temp[42][48]; |
+ uint8_t s_indexmapped[8][48]; |
+ ///Envelope scalefactors |
+ float env_facs[6][48]; |
+ ///Noise scalefactors |
+ float noise_facs[3][5]; |
+ ///Envelope time borders |
+ uint8_t t_env[8]; |
+ ///Envelope time border of the last envelope of the previous frame |
+ uint8_t t_env_num_env_old; |
+ ///Noise time borders |
+ uint8_t t_q[3]; |
+ unsigned f_indexnoise; |
+ unsigned f_indexsine; |
+ /** @} */ |
+} SBRData; |
+ |
+/** |
+ * Spectral Band Replication |
+ */ |
+typedef struct { |
+ int sample_rate; |
+ int start; |
+ int reset; |
+ SpectrumParameters spectrum_params; |
+ int bs_amp_res_header; |
+ /** |
+ * @defgroup bs_header_extra_2 variables associated with bs_header_extra_2 |
+ * @{ |
+ */ |
+ unsigned bs_limiter_bands; |
+ unsigned bs_limiter_gains; |
+ unsigned bs_interpol_freq; |
+ unsigned bs_smoothing_mode; |
+ /** @} */ |
+ unsigned bs_coupling; |
+ unsigned k[5]; ///< k0, k1, k2 |
+ ///kx', and kx respectively, kx is the first QMF subband where SBR is used. |
+ ///kx' is its value from the previous frame |
+ unsigned kx[2]; |
+ ///M' and M respectively, M is the number of QMF subbands that use SBR. |
+ unsigned m[2]; |
+ ///The number of frequency bands in f_master |
+ unsigned n_master; |
+ SBRData data[2]; |
+ ///N_Low and N_High respectively, the number of frequency bands for low and high resolution |
+ unsigned n[2]; |
+ ///Number of noise floor bands |
+ unsigned n_q; |
+ ///Number of limiter bands |
+ unsigned n_lim; |
+ ///The master QMF frequency grouping |
+ uint16_t f_master[49]; |
+ ///Frequency borders for low resolution SBR |
+ uint16_t f_tablelow[25]; |
+ ///Frequency borders for high resolution SBR |
+ uint16_t f_tablehigh[49]; |
+ ///Frequency borders for noise floors |
+ uint16_t f_tablenoise[6]; |
+ ///Frequency borders for the limiter |
+ uint16_t f_tablelim[29]; |
+ unsigned num_patches; |
+ uint8_t patch_num_subbands[6]; |
+ uint8_t patch_start_subband[6]; |
+ ///QMF low frequency input to the HF generator |
+ float X_low[32][40][2]; |
+ ///QMF output of the HF generator |
+ float X_high[64][40][2]; |
+ ///QMF values of the reconstructed signal |
+ DECLARE_ALIGNED(16, float, X)[2][32][64]; |
+ ///Zeroth coefficient used to filter the subband signals |
+ float alpha0[64][2]; |
+ ///First coefficient used to filter the subband signals |
+ float alpha1[64][2]; |
+ ///Dequantized envelope scalefactors, remapped |
+ float e_origmapped[7][48]; |
+ ///Dequantized noise scalefactors, remapped |
+ float q_mapped[7][48]; |
+ ///Sinusoidal presence, remapped |
+ uint8_t s_mapped[7][48]; |
+ ///Estimated envelope |
+ float e_curr[7][48]; |
+ ///Amplitude adjusted noise scalefactors |
+ float q_m[7][48]; |
+ ///Sinusoidal levels |
+ float s_m[7][48]; |
+ float gain[7][48]; |
+ DECLARE_ALIGNED(16, float, qmf_filter_scratch)[5][64]; |
+ RDFTContext rdft; |
+ FFTContext mdct; |
+} SpectralBandReplication; |
+ |
+#endif /* AVCODEC_SBR_H */ |