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qdm2_tablegen.h
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1 /*
2  * Header file for hardcoded QDM2 tables
3  *
4  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVCODEC_QDM2_TABLEGEN_H
24 #define AVCODEC_QDM2_TABLEGEN_H
25 
26 #include <stdint.h>
27 #include <math.h>
28 #include "libavutil/attributes.h"
29 #include "qdm2data.h"
30 
31 #define SOFTCLIP_THRESHOLD 27600
32 #define HARDCLIP_THRESHOLD 35716
33 
34 #if CONFIG_HARDCODED_TABLES
35 #define softclip_table_init()
36 #define rnd_table_init()
37 #define init_noise_samples()
38 #define qdm2_init_vlc()
39 #include "libavcodec/qdm2_tables.h"
40 #else
41 static uint16_t softclip_table[HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1];
42 static float noise_table[4096 + 20];
43 static uint8_t random_dequant_index[256][5];
44 static uint8_t random_dequant_type24[128][3];
45 static float noise_samples[128];
46 
47 static av_cold void softclip_table_init(void) {
48  int i;
49  double dfl = SOFTCLIP_THRESHOLD - 32767;
50  float delta = 1.0 / -dfl;
51  for (i = 0; i < HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1; i++)
52  softclip_table[i] = SOFTCLIP_THRESHOLD - ((int)(sin((float)i * delta) * dfl) & 0x0000FFFF);
53 }
54 
55 
56 // random generated table
57 static av_cold void rnd_table_init(void) {
58  int i,j;
59  uint32_t ldw;
60  uint64_t random_seed = 0;
61  float delta = 1.0 / 16384.0;
62  for(i = 0; i < 4096 ;i++) {
63  random_seed = random_seed * 214013 + 2531011;
64  noise_table[i] = (delta * (float)(((int32_t)random_seed >> 16) & 0x00007FFF)- 1.0) * 1.3;
65  }
66 
67  for (i = 0; i < 256 ;i++) {
68  random_seed = 81;
69  ldw = i;
70  for (j = 0; j < 5 ;j++) {
71  random_dequant_index[i][j] = ldw / random_seed;
72  ldw %= random_seed;
73  random_seed /= 3;
74  }
75  }
76  for (i = 0; i < 128 ;i++) {
77  random_seed = 25;
78  ldw = i;
79  for (j = 0; j < 3 ;j++) {
80  random_dequant_type24[i][j] = ldw / random_seed;
81  ldw %= random_seed;
82  random_seed /= 5;
83  }
84  }
85 }
86 
87 
88 static av_cold void init_noise_samples(void) {
89  int i;
90  unsigned random_seed = 0;
91  float delta = 1.0 / 16384.0;
92  for (i = 0; i < 128;i++) {
93  random_seed = random_seed * 214013 + 2531011;
94  noise_samples[i] = (delta * (float)((random_seed >> 16) & 0x00007fff) - 1.0);
95  }
96 }
97 
98 static VLC vlc_tab_level;
99 static VLC vlc_tab_diff;
100 static VLC vlc_tab_run;
101 static VLC fft_level_exp_alt_vlc;
102 static VLC fft_level_exp_vlc;
103 static VLC fft_stereo_exp_vlc;
104 static VLC fft_stereo_phase_vlc;
105 static VLC vlc_tab_tone_level_idx_hi1;
106 static VLC vlc_tab_tone_level_idx_mid;
107 static VLC vlc_tab_tone_level_idx_hi2;
108 static VLC vlc_tab_type30;
109 static VLC vlc_tab_type34;
110 static VLC vlc_tab_fft_tone_offset[5];
111 
112 static const uint16_t qdm2_vlc_offs[] = {
113  0,260,566,598,894,1166,1230,1294,1678,1950,2214,2278,2310,2570,2834,3124,3448,3838,
114 };
115 
116 static VLC_TYPE qdm2_table[3838][2];
117 
118 static av_cold void qdm2_init_vlc(void)
119 {
120  vlc_tab_level.table = &qdm2_table[qdm2_vlc_offs[0]];
121  vlc_tab_level.table_allocated = qdm2_vlc_offs[1] - qdm2_vlc_offs[0];
122  init_vlc(&vlc_tab_level, 8, 24,
123  vlc_tab_level_huffbits, 1, 1,
124  vlc_tab_level_huffcodes, 2, 2,
125  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
126 
127  vlc_tab_diff.table = &qdm2_table[qdm2_vlc_offs[1]];
128  vlc_tab_diff.table_allocated = qdm2_vlc_offs[2] - qdm2_vlc_offs[1];
129  init_vlc(&vlc_tab_diff, 8, 37,
130  vlc_tab_diff_huffbits, 1, 1,
131  vlc_tab_diff_huffcodes, 2, 2,
132  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
133 
134  vlc_tab_run.table = &qdm2_table[qdm2_vlc_offs[2]];
135  vlc_tab_run.table_allocated = qdm2_vlc_offs[3] - qdm2_vlc_offs[2];
136  init_vlc(&vlc_tab_run, 5, 6,
137  vlc_tab_run_huffbits, 1, 1,
138  vlc_tab_run_huffcodes, 1, 1,
139  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
140 
141  fft_level_exp_alt_vlc.table = &qdm2_table[qdm2_vlc_offs[3]];
142  fft_level_exp_alt_vlc.table_allocated = qdm2_vlc_offs[4] -
143  qdm2_vlc_offs[3];
144  init_vlc(&fft_level_exp_alt_vlc, 8, 28,
145  fft_level_exp_alt_huffbits, 1, 1,
146  fft_level_exp_alt_huffcodes, 2, 2,
147  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
148 
149  fft_level_exp_vlc.table = &qdm2_table[qdm2_vlc_offs[4]];
150  fft_level_exp_vlc.table_allocated = qdm2_vlc_offs[5] - qdm2_vlc_offs[4];
151  init_vlc(&fft_level_exp_vlc, 8, 20,
152  fft_level_exp_huffbits, 1, 1,
153  fft_level_exp_huffcodes, 2, 2,
154  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
155 
156  fft_stereo_exp_vlc.table = &qdm2_table[qdm2_vlc_offs[5]];
157  fft_stereo_exp_vlc.table_allocated = qdm2_vlc_offs[6] -
158  qdm2_vlc_offs[5];
159  init_vlc(&fft_stereo_exp_vlc, 6, 7,
160  fft_stereo_exp_huffbits, 1, 1,
161  fft_stereo_exp_huffcodes, 1, 1,
162  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
163 
164  fft_stereo_phase_vlc.table = &qdm2_table[qdm2_vlc_offs[6]];
165  fft_stereo_phase_vlc.table_allocated = qdm2_vlc_offs[7] -
166  qdm2_vlc_offs[6];
167  init_vlc(&fft_stereo_phase_vlc, 6, 9,
168  fft_stereo_phase_huffbits, 1, 1,
169  fft_stereo_phase_huffcodes, 1, 1,
170  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
171 
172  vlc_tab_tone_level_idx_hi1.table =
173  &qdm2_table[qdm2_vlc_offs[7]];
174  vlc_tab_tone_level_idx_hi1.table_allocated = qdm2_vlc_offs[8] -
175  qdm2_vlc_offs[7];
176  init_vlc(&vlc_tab_tone_level_idx_hi1, 8, 20,
177  vlc_tab_tone_level_idx_hi1_huffbits, 1, 1,
178  vlc_tab_tone_level_idx_hi1_huffcodes, 2, 2,
179  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
180 
181  vlc_tab_tone_level_idx_mid.table =
182  &qdm2_table[qdm2_vlc_offs[8]];
183  vlc_tab_tone_level_idx_mid.table_allocated = qdm2_vlc_offs[9] -
184  qdm2_vlc_offs[8];
185  init_vlc(&vlc_tab_tone_level_idx_mid, 8, 24,
186  vlc_tab_tone_level_idx_mid_huffbits, 1, 1,
187  vlc_tab_tone_level_idx_mid_huffcodes, 2, 2,
188  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
189 
190  vlc_tab_tone_level_idx_hi2.table =
191  &qdm2_table[qdm2_vlc_offs[9]];
192  vlc_tab_tone_level_idx_hi2.table_allocated = qdm2_vlc_offs[10] -
193  qdm2_vlc_offs[9];
194  init_vlc(&vlc_tab_tone_level_idx_hi2, 8, 24,
195  vlc_tab_tone_level_idx_hi2_huffbits, 1, 1,
196  vlc_tab_tone_level_idx_hi2_huffcodes, 2, 2,
197  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
198 
199  vlc_tab_type30.table = &qdm2_table[qdm2_vlc_offs[10]];
200  vlc_tab_type30.table_allocated = qdm2_vlc_offs[11] - qdm2_vlc_offs[10];
201  init_vlc(&vlc_tab_type30, 6, 9,
202  vlc_tab_type30_huffbits, 1, 1,
203  vlc_tab_type30_huffcodes, 1, 1,
204  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
205 
206  vlc_tab_type34.table = &qdm2_table[qdm2_vlc_offs[11]];
207  vlc_tab_type34.table_allocated = qdm2_vlc_offs[12] - qdm2_vlc_offs[11];
208  init_vlc(&vlc_tab_type34, 5, 10,
209  vlc_tab_type34_huffbits, 1, 1,
210  vlc_tab_type34_huffcodes, 1, 1,
211  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
212 
213  vlc_tab_fft_tone_offset[0].table =
214  &qdm2_table[qdm2_vlc_offs[12]];
215  vlc_tab_fft_tone_offset[0].table_allocated = qdm2_vlc_offs[13] -
216  qdm2_vlc_offs[12];
217  init_vlc(&vlc_tab_fft_tone_offset[0], 8, 23,
218  vlc_tab_fft_tone_offset_0_huffbits, 1, 1,
219  vlc_tab_fft_tone_offset_0_huffcodes, 2, 2,
220  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
221 
222  vlc_tab_fft_tone_offset[1].table =
223  &qdm2_table[qdm2_vlc_offs[13]];
224  vlc_tab_fft_tone_offset[1].table_allocated = qdm2_vlc_offs[14] -
225  qdm2_vlc_offs[13];
226  init_vlc(&vlc_tab_fft_tone_offset[1], 8, 28,
227  vlc_tab_fft_tone_offset_1_huffbits, 1, 1,
228  vlc_tab_fft_tone_offset_1_huffcodes, 2, 2,
229  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
230 
231  vlc_tab_fft_tone_offset[2].table =
232  &qdm2_table[qdm2_vlc_offs[14]];
233  vlc_tab_fft_tone_offset[2].table_allocated = qdm2_vlc_offs[15] -
234  qdm2_vlc_offs[14];
235  init_vlc(&vlc_tab_fft_tone_offset[2], 8, 32,
236  vlc_tab_fft_tone_offset_2_huffbits, 1, 1,
237  vlc_tab_fft_tone_offset_2_huffcodes, 2, 2,
238  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
239 
240  vlc_tab_fft_tone_offset[3].table =
241  &qdm2_table[qdm2_vlc_offs[15]];
242  vlc_tab_fft_tone_offset[3].table_allocated = qdm2_vlc_offs[16] -
243  qdm2_vlc_offs[15];
244  init_vlc(&vlc_tab_fft_tone_offset[3], 8, 35,
245  vlc_tab_fft_tone_offset_3_huffbits, 1, 1,
246  vlc_tab_fft_tone_offset_3_huffcodes, 2, 2,
247  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
248 
249  vlc_tab_fft_tone_offset[4].table =
250  &qdm2_table[qdm2_vlc_offs[16]];
251  vlc_tab_fft_tone_offset[4].table_allocated = qdm2_vlc_offs[17] -
252  qdm2_vlc_offs[16];
253  init_vlc(&vlc_tab_fft_tone_offset[4], 8, 38,
254  vlc_tab_fft_tone_offset_4_huffbits, 1, 1,
255  vlc_tab_fft_tone_offset_4_huffcodes, 2, 2,
256  INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
257 }
258 
259 #endif /* CONFIG_HARDCODED_TABLES */
260 
261 #endif /* AVCODEC_QDM2_TABLEGEN_H */
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