/* * Header file for hardcoded QDM2 tables * * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> * * 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 */ #ifndef AVCODEC_QDM2_TABLEGEN_H #define AVCODEC_QDM2_TABLEGEN_H #include <stdint.h> #include <math.h> #include "libavutil/attributes.h" #include "qdm2data.h" #define SOFTCLIP_THRESHOLD 27600 #define HARDCLIP_THRESHOLD 35716 #if CONFIG_HARDCODED_TABLES #define softclip_table_init() #define rnd_table_init() #define init_noise_samples() #define qdm2_init_vlc() #include "libavcodec/qdm2_tables.h" #else static uint16_t softclip_table[HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1]; static float noise_table[4096 + 20]; static uint8_t random_dequant_index[256][5]; static uint8_t random_dequant_type24[128][3]; static float noise_samples[128]; static av_cold void softclip_table_init(void) { int i; double dfl = SOFTCLIP_THRESHOLD - 32767; float delta = 1.0 / -dfl; for (i = 0; i < HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1; i++) softclip_table[i] = SOFTCLIP_THRESHOLD - ((int)(sin((float)i * delta) * dfl) & 0x0000FFFF); } // random generated table static av_cold void rnd_table_init(void) { int i,j; uint32_t ldw; uint64_t random_seed = 0; float delta = 1.0 / 16384.0; for(i = 0; i < 4096 ;i++) { random_seed = random_seed * 214013 + 2531011; noise_table[i] = (delta * (float)(((int32_t)random_seed >> 16) & 0x00007FFF)- 1.0) * 1.3; } for (i = 0; i < 256 ;i++) { random_seed = 81; ldw = i; for (j = 0; j < 5 ;j++) { random_dequant_index[i][j] = ldw / random_seed; ldw %= random_seed; random_seed /= 3; } } for (i = 0; i < 128 ;i++) { random_seed = 25; ldw = i; for (j = 0; j < 3 ;j++) { random_dequant_type24[i][j] = ldw / random_seed; ldw %= random_seed; random_seed /= 5; } } } static av_cold void init_noise_samples(void) { int i; unsigned random_seed = 0; float delta = 1.0 / 16384.0; for (i = 0; i < 128;i++) { random_seed = random_seed * 214013 + 2531011; noise_samples[i] = (delta * (float)((random_seed >> 16) & 0x00007fff) - 1.0); } } static VLC vlc_tab_level; static VLC vlc_tab_diff; static VLC vlc_tab_run; static VLC fft_level_exp_alt_vlc; static VLC fft_level_exp_vlc; static VLC fft_stereo_exp_vlc; static VLC fft_stereo_phase_vlc; static VLC vlc_tab_tone_level_idx_hi1; static VLC vlc_tab_tone_level_idx_mid; static VLC vlc_tab_tone_level_idx_hi2; static VLC vlc_tab_type30; static VLC vlc_tab_type34; static VLC vlc_tab_fft_tone_offset[5]; static VLC_TYPE qdm2_table[3838][2]; static av_cold void build_vlc(VLC *vlc, int nb_bits, int nb_codes, unsigned *offset, const uint8_t tab[][2]) { vlc->table = &qdm2_table[*offset]; vlc->table_allocated = FF_ARRAY_ELEMS(qdm2_table) - *offset; ff_init_vlc_from_lengths(vlc, nb_bits, nb_codes, &tab[0][1], 2, &tab[0][0], 2, 1, -1, INIT_VLC_STATIC_OVERLONG | INIT_VLC_LE, NULL); *offset += vlc->table_size; } static av_cold void qdm2_init_vlc(void) { const uint8_t (*tab)[2] = tab_fft_tone_offset; unsigned offset = 0; build_vlc(&vlc_tab_level, 8, 24, &offset, tab_level); build_vlc(&vlc_tab_diff, 8, 33, &offset, tab_diff); build_vlc(&vlc_tab_run, 5, 6, &offset, tab_run); build_vlc(&fft_level_exp_alt_vlc, 8, 28, &offset, fft_level_exp_alt); build_vlc(&fft_level_exp_vlc, 8, 20, &offset, fft_level_exp); build_vlc(&fft_stereo_exp_vlc, 6, 7, &offset, fft_stereo_exp); build_vlc(&fft_stereo_phase_vlc, 6, 9, &offset, fft_stereo_phase); build_vlc(&vlc_tab_tone_level_idx_hi1, 8, 20, &offset, tab_tone_level_idx_hi1); build_vlc(&vlc_tab_tone_level_idx_mid, 8, 13, &offset, tab_tone_level_idx_mid); build_vlc(&vlc_tab_tone_level_idx_hi2, 8, 18, &offset, tab_tone_level_idx_hi2); build_vlc(&vlc_tab_type30, 6, 9, &offset, tab_type30); build_vlc(&vlc_tab_type34, 5, 10, &offset, tab_type34); for (int i = 0; i < 5; i++) { build_vlc(&vlc_tab_fft_tone_offset[i], 8, tab_fft_tone_offset_sizes[i], &offset, tab); tab += tab_fft_tone_offset_sizes[i]; } } #endif /* CONFIG_HARDCODED_TABLES */ #endif /* AVCODEC_QDM2_TABLEGEN_H */