FFmpeg
cfhddata.c
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1 /*
2  * Copyright (c) 2015 Kieran Kunhya
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdint.h>
22 
23 #include "libavutil/attributes.h"
24 
25 #include "cfhd.h"
26 #include "vlc.h"
27 
28 #define NB_VLC_TABLE_9 (71 + 3)
29 #define NB_VLC_TABLE_18 (263 + 1)
30 
31 typedef struct CFHD_RL_ELEM {
32  uint16_t run;
33  uint8_t level;
34  uint8_t len;
35 } CFHD_RL_ELEM;
36 
37 static const CFHD_RL_ELEM table_9_vlc[NB_VLC_TABLE_9] = {
38  { 1, 0, 1 }, { 1, 1, 2 }, { 1, 2, 4 }, { 1, 3, 5 },
39  { 1, 6, 7 }, { 1, 15, 11 }, { 1, 26, 14 }, { 1, 27, 14 },
40  { 1, 23, 13 }, { 1, 36, 16 }, { 1, 40, 17 }, { 1, 41, 17 },
41  { 1, 32, 15 }, { 1, 48, 19 }, { 1, 49, 19 }, { 1, 51, 20 },
42  { 1, 52, 20 }, { 1, 50, 19 }, { 1, 42, 17 }, { 1, 37, 16 },
43  { 1, 33, 15 }, { 1, 24, 13 }, { 1, 13, 10 }, { 1, 10, 9 },
44  { 1, 8, 8 }, { 1, 5, 6 }, { 80, 0, 8 }, { 1, 16, 11 },
45  { 1, 19, 12 }, { 1, 20, 12 }, { 1, 14, 10 }, { 120, 0, 9 },
46  { 320, 0, 8 }, { 1, 11, 9 }, { 1, 28, 14 }, { 1, 29, 14 },
47  { 1, 25, 13 }, { 1, 21, 12 }, { 1, 17, 11 }, { 1, 34, 15 },
48  { 1, 45, 18 }, { 1, 46, 18 }, { 1, 47, 18 }, { 1, 57, 23 },
49  { 1, 58, 23 }, { 1, 59, 23 }, { 1, 62, 24 }, { 1, 63, 24 },
50  { 1, 56, 22 }, { 1, 60, 23 }, { 1, 61, 24 }, { 1, 64, 25 },
51  { 0, 64, 26 }, { 1, 64, 26 }, { 1, 53, 20 }, { 1, 54, 20 },
52  { 1, 55, 20 }, { 1, 38, 16 }, { 1, 30, 14 }, { 1, 31, 14 },
53  { 1, 43, 17 }, { 1, 44, 17 }, { 1, 39, 16 }, { 1, 35, 15 },
54  { 1, 22, 12 }, { 1, 18, 11 }, { 32, 0, 6 }, { 12, 0, 5 },
55  { 1, 4, 5 }, { 160, 0, 6 }, { 1, 7, 7 }, { 1, 9, 8 },
56  { 100, 0, 9 }, { 1, 12, 9 },
57 };
58 
59 static const CFHD_RL_ELEM table_18_vlc[NB_VLC_TABLE_18] = {
60  { 1, 0, 1 }, { 1, 1, 2 }, { 1, 4, 6 }, { 1, 14, 10 },
61  { 1, 23, 12 }, { 1, 41, 15 }, { 1, 54, 17 }, { 1, 69, 19 },
62  { 1, 77, 20 }, { 1, 85, 21 }, { 1, 108, 24 }, { 1, 237, 25 },
63  { 1, 238, 25 }, { 1, 101, 23 }, { 1, 172, 25 }, { 1, 173, 25 },
64  { 1, 170, 25 }, { 1, 171, 25 }, { 1, 227, 25 }, { 1, 162, 25 },
65  { 1, 156, 25 }, { 1, 157, 25 }, { 1, 243, 25 }, { 1, 134, 25 },
66  { 1, 135, 25 }, { 1, 136, 25 }, { 1, 128, 25 }, { 1, 129, 25 },
67  { 1, 247, 25 }, { 1, 127, 25 }, { 1, 178, 25 }, { 1, 179, 25 },
68  { 1, 214, 25 }, { 1, 118, 25 }, { 1, 204, 25 }, { 1, 205, 25 },
69  { 1, 198, 25 }, { 1, 199, 25 }, { 1, 245, 25 }, { 1, 246, 25 },
70  { 1, 242, 25 }, { 1, 244, 25 }, { 1, 230, 25 }, { 1, 119, 25 },
71  { 1, 193, 25 }, { 1, 194, 25 }, { 1, 186, 25 }, { 1, 187, 25 },
72  { 1, 211, 25 }, { 1, 190, 25 }, { 1, 163, 25 }, { 1, 164, 25 },
73  { 1, 220, 25 }, { 1, 221, 25 }, { 1, 216, 25 }, { 1, 217, 25 },
74  { 1, 212, 25 }, { 1, 213, 25 }, { 1, 206, 25 }, { 1, 208, 25 },
75  { 1, 209, 25 }, { 1, 210, 25 }, { 1, 122, 25 }, { 1, 248, 25 },
76  { 1, 235, 25 }, { 1, 148, 25 }, { 1, 253, 25 }, { 1, 254, 25 },
77  { 1, 123, 25 }, { 1, 124, 25 }, { 1, 215, 25 }, { 1, 117, 25 },
78  { 1, 234, 25 }, { 1, 236, 25 }, { 1, 142, 25 }, { 1, 143, 25 },
79  { 1, 153, 25 }, { 1, 154, 25 }, { 1, 176, 25 }, { 1, 177, 25 },
80  { 1, 174, 25 }, { 1, 175, 25 }, { 1, 184, 25 }, { 1, 185, 25 },
81  { 1, 240, 25 }, { 1, 241, 25 }, { 1, 239, 25 }, { 1, 141, 25 },
82  { 1, 139, 25 }, { 1, 140, 25 }, { 1, 125, 25 }, { 1, 126, 25 },
83  { 1, 130, 25 }, { 1, 131, 25 }, { 1, 228, 25 }, { 1, 229, 25 },
84  { 1, 232, 25 }, { 1, 233, 25 }, { 1, 132, 25 }, { 1, 133, 25 },
85  { 1, 137, 25 }, { 1, 138, 25 }, { 1, 255, 25 }, { 1, 116, 26 },
86  { 0, 255, 26 }, { 1, 249, 25 }, { 1, 250, 25 }, { 1, 251, 25 },
87  { 1, 252, 25 }, { 1, 120, 25 }, { 1, 121, 25 }, { 1, 222, 25 },
88  { 1, 224, 25 }, { 1, 218, 25 }, { 1, 219, 25 }, { 1, 200, 25 },
89  { 1, 201, 25 }, { 1, 191, 25 }, { 1, 192, 25 }, { 1, 149, 25 },
90  { 1, 150, 25 }, { 1, 151, 25 }, { 1, 152, 25 }, { 1, 146, 25 },
91  { 1, 147, 25 }, { 1, 144, 25 }, { 1, 145, 25 }, { 1, 165, 25 },
92  { 1, 166, 25 }, { 1, 167, 25 }, { 1, 168, 25 }, { 1, 158, 25 },
93  { 1, 159, 25 }, { 1, 223, 25 }, { 1, 169, 25 }, { 1, 207, 25 },
94  { 1, 197, 25 }, { 1, 202, 25 }, { 1, 203, 25 }, { 1, 188, 25 },
95  { 1, 189, 25 }, { 1, 225, 25 }, { 1, 226, 25 }, { 1, 195, 25 },
96  { 1, 196, 25 }, { 1, 182, 25 }, { 1, 183, 25 }, { 1, 231, 25 },
97  { 1, 155, 25 }, { 1, 160, 25 }, { 1, 161, 25 }, { 1, 48, 16 },
98  { 1, 36, 14 }, { 1, 30, 13 }, { 1, 19, 11 }, { 1, 11, 9 },
99  { 32, 0, 9 }, { 1, 15, 10 }, { 1, 24, 12 }, { 1, 42, 15 },
100  { 1, 62, 18 }, { 1, 70, 19 }, { 1, 94, 22 }, { 1, 180, 25 },
101  { 1, 181, 25 }, { 1, 109, 24 }, { 1, 102, 23 }, { 1, 86, 21 },
102  { 1, 78, 20 }, { 1, 55, 17 }, { 1, 49, 16 }, { 1, 37, 14 },
103  { 1, 31, 13 }, { 1, 25, 12 }, { 1, 43, 15 }, { 1, 63, 18 },
104  { 1, 71, 19 }, { 1, 79, 20 }, { 1, 87, 21 }, { 1, 88, 21 },
105  { 1, 56, 17 }, { 1, 50, 16 }, { 1, 38, 14 }, { 180, 0, 13 },
106  { 1, 6, 7 }, { 1, 3, 5 }, { 1, 12, 9 }, { 1, 20, 11 },
107  { 100, 0, 11 }, { 60, 0, 10 }, { 20, 0, 8 }, { 12, 0, 7 },
108  { 1, 9, 8 }, { 1, 16, 10 }, { 1, 32, 13 }, { 1, 44, 15 },
109  { 1, 64, 18 }, { 1, 72, 19 }, { 1, 80, 20 }, { 1, 95, 22 },
110  { 1, 96, 22 }, { 1, 110, 24 }, { 1, 111, 24 }, { 1, 103, 23 },
111  { 1, 104, 23 }, { 1, 105, 23 }, { 1, 57, 17 }, { 1, 65, 18 },
112  { 1, 73, 19 }, { 1, 81, 20 }, { 1, 89, 21 }, { 1, 97, 22 },
113  { 1, 98, 22 }, { 1, 58, 17 }, { 1, 39, 14 }, { 1, 26, 12 },
114  { 1, 21, 11 }, { 1, 13, 9 }, { 1, 7, 7 }, { 1, 5, 6 },
115  { 1, 10, 8 }, { 1, 33, 13 }, { 1, 51, 16 }, { 1, 66, 18 },
116  { 1, 74, 19 }, { 1, 82, 20 }, { 1, 90, 21 }, { 1, 91, 21 },
117  { 1, 59, 17 }, { 1, 45, 15 }, { 1, 52, 16 }, { 1, 67, 18 },
118  { 1, 75, 19 }, { 1, 83, 20 }, { 1, 112, 24 }, { 1, 113, 24 },
119  { 1, 106, 23 }, { 1, 99, 22 }, { 1, 92, 21 }, { 1, 68, 18 },
120  { 1, 76, 19 }, { 1, 84, 20 }, { 1, 107, 23 }, { 1, 114, 24 },
121  { 1, 115, 24 }, { 1, 100, 22 }, { 1, 93, 21 }, { 1, 46, 15 },
122  { 1, 27, 12 }, { 1, 34, 13 }, { 320, 0, 13 }, { 1, 28, 12 },
123  { 1, 17, 10 }, { 1, 22, 11 }, { 1, 40, 14 }, { 1, 53, 16 },
124  { 1, 60, 17 }, { 1, 61, 17 }, { 1, 47, 15 }, { 1, 35, 13 },
125  { 1, 29, 12 }, { 1, 18, 10 }, { 1, 8, 7 }, { 1, 2, 3 },
126 };
127 
128 static av_cold int cfhd_init_vlc(CFHD_RL_VLC_ELEM out[], unsigned out_size,
129  const CFHD_RL_ELEM table_vlc[], unsigned table_size,
130  CFHD_RL_VLC_ELEM tmp[], void *logctx)
131 {
132  VLC vlc;
133  unsigned j;
134  int ret;
135 
136  /** Similar to dv.c, generate signed VLC tables **/
137 
138  for (unsigned i = j = 0; i < table_size; i++, j++) {
139  tmp[j].len = table_vlc[i].len;
140  tmp[j].run = table_vlc[i].run;
141  tmp[j].level = table_vlc[i].level;
142 
143  /* Don't include the zero level nor escape bits */
144  if (table_vlc[i].level && table_vlc[i].run) {
145  tmp[j].len++;
146  j++;
147  tmp[j].len = table_vlc[i].len + 1;
148  tmp[j].run = table_vlc[i].run;
149  tmp[j].level = -table_vlc[i].level;
150  }
151  }
152 
153  ret = ff_vlc_init_from_lengths(&vlc, VLC_BITS, j,
154  &tmp[0].len, sizeof(tmp[0]),
155  NULL, 0, 0, 0, 0, logctx);
156  if (ret < 0)
157  return ret;
158  av_assert0(vlc.table_size == out_size);
159 
160  for (unsigned i = out_size; i-- > 0;) {
161  int code = vlc.table[i].sym;
162  int len = vlc.table[i].len;
163  int level, run;
164 
165  if (len < 0) { // more bits needed
166  run = 0;
167  level = code;
168  } else {
169  run = tmp[code].run;
170  level = tmp[code].level;
171  }
172  out[i].len = len;
173  out[i].level = level;
174  out[i].run = run;
175  }
176  ff_vlc_free(&vlc);
177 
178  return 0;
179 }
180 
181 av_cold int ff_cfhd_init_vlcs(CFHDContext *s)
182 {
183  int ret;
184 
185  /* Table 18 - we reuse the unused table_9_rl_vlc as scratch buffer here */
186  ret = cfhd_init_vlc(s->table_18_rl_vlc, FF_ARRAY_ELEMS(s->table_18_rl_vlc),
187  table_18_vlc, FF_ARRAY_ELEMS(table_18_vlc),
188  s->table_9_rl_vlc, s->avctx);
189  if (ret < 0)
190  return ret;
191  /* Table 9 - table_9_rl_vlc itself is used as scratch buffer; it works
192  * because we are counting down in the final loop */
193  ret = cfhd_init_vlc(s->table_9_rl_vlc, FF_ARRAY_ELEMS(s->table_9_rl_vlc),
194  table_9_vlc, FF_ARRAY_ELEMS(table_9_vlc),
195  s->table_9_rl_vlc, s->avctx);
196  if (ret < 0)
197  return ret;
198  return 0;
199 }
ff_vlc_init_from_lengths
int ff_vlc_init_from_lengths(VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: vlc.c:306
level
uint8_t level
Definition: svq3.c:204
out
FILE * out
Definition: movenc.c:54
out_size
int out_size
Definition: movenc.c:55
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
VLCElem::len
VLCBaseType len
Definition: vlc.h:30
NB_VLC_TABLE_9
#define NB_VLC_TABLE_9
Definition: cfhddata.c:28
cfhd.h
VLCElem::sym
VLCBaseType sym
Definition: vlc.h:30
CFHD_RL_ELEM::len
uint8_t len
Definition: cfhddata.c:34
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
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av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:198
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
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#define NULL
Definition: coverity.c:32
run
uint8_t run
Definition: svq3.c:203
CFHD_RL_VLC_ELEM
Definition: cfhd.h:99
VLC_BITS
#define VLC_BITS
Definition: cfhd.h:95
table_18_vlc
static const CFHD_RL_ELEM table_18_vlc[NB_VLC_TABLE_18]
Definition: cfhddata.c:59
attributes.h
ff_cfhd_init_vlcs
av_cold int ff_cfhd_init_vlcs(CFHDContext *s)
Definition: cfhddata.c:181
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
code
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
Definition: filter_design.txt:178
CFHDContext
Definition: cfhd.h:139
CFHD_RL_ELEM::level
uint8_t level
Definition: cfhddata.c:33
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Definition: cfhddata.c:31
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ff_vlc_free
void ff_vlc_free(VLC *vlc)
Definition: vlc.c:509
ret
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Definition: filter_design.txt:187
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Definition: vlc.h:33
NB_VLC_TABLE_18
#define NB_VLC_TABLE_18
Definition: cfhddata.c:29
VLC::table
VLCElem * table
Definition: vlc.h:35
cfhd_init_vlc
static av_cold int cfhd_init_vlc(CFHD_RL_VLC_ELEM out[], unsigned out_size, const CFHD_RL_ELEM table_vlc[], unsigned table_size, CFHD_RL_VLC_ELEM tmp[], void *logctx)
Definition: cfhddata.c:128
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int table_size
Definition: vlc.h:36
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static const CFHD_RL_ELEM table_9_vlc[NB_VLC_TABLE_9]
Definition: cfhddata.c:37
CFHD_RL_ELEM::run
uint16_t run
Definition: cfhddata.c:32
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