FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/jpeg2000.h
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 15 24 62.5%
Branches: 2 16 12.5%

Line Branch Exec Source
1 /*
2 * JPEG 2000 common defines, structures and functions
3 * Copyright (c) 2007 Kamil Nowosad
4 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
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_JPEG2000_H
24 #define AVCODEC_JPEG2000_H
25
26 /**
27 * @file
28 * JPEG 2000 structures and defines common
29 * to encoder and decoder
30 */
31
32 #include <stdint.h>
33
34 #include "avcodec.h"
35 #include "mqc.h"
36 #include "jpeg2000dwt.h"
37
38 enum Jpeg2000Markers {
39 JPEG2000_SOC = 0xff4f, // start of codestream
40 JPEG2000_SIZ = 0xff51, // image and tile size
41 JPEG2000_COD, // coding style default
42 JPEG2000_COC, // coding style component
43 JPEG2000_TLM = 0xff55, // tile-part length, main header
44 JPEG2000_PLM = 0xff57, // packet length, main header
45 JPEG2000_PLT, // packet length, tile-part header
46 JPEG2000_QCD = 0xff5c, // quantization default
47 JPEG2000_QCC, // quantization component
48 JPEG2000_RGN, // region of interest
49 JPEG2000_POC, // progression order change
50 JPEG2000_PPM, // packed packet headers, main header
51 JPEG2000_PPT, // packed packet headers, tile-part header
52 JPEG2000_CRG = 0xff63, // component registration
53 JPEG2000_COM, // comment
54 JPEG2000_SOT = 0xff90, // start of tile-part
55 JPEG2000_SOP, // start of packet
56 JPEG2000_EPH, // end of packet header
57 JPEG2000_SOD, // start of data
58 JPEG2000_EOC = 0xffd9, // end of codestream
59 };
60
61 #define JPEG2000_SOP_FIXED_BYTES 0xFF910004
62 #define JPEG2000_SOP_BYTE_LENGTH 6
63
64 enum Jpeg2000Quantsty { // quantization style
65 JPEG2000_QSTY_NONE, // no quantization
66 JPEG2000_QSTY_SI, // scalar derived
67 JPEG2000_QSTY_SE // scalar expounded
68 };
69
70 #define JPEG2000_MAX_DECLEVELS 33
71 #define JPEG2000_MAX_RESLEVELS (JPEG2000_MAX_DECLEVELS + 1)
72
73 #define JPEG2000_MAX_PASSES 100
74
75 // T1 flags
76 // flags determining significance of neighbor coefficients
77 #define JPEG2000_T1_SIG_N 0x0001
78 #define JPEG2000_T1_SIG_E 0x0002
79 #define JPEG2000_T1_SIG_W 0x0004
80 #define JPEG2000_T1_SIG_S 0x0008
81 #define JPEG2000_T1_SIG_NE 0x0010
82 #define JPEG2000_T1_SIG_NW 0x0020
83 #define JPEG2000_T1_SIG_SE 0x0040
84 #define JPEG2000_T1_SIG_SW 0x0080
85 #define JPEG2000_T1_SIG_NB (JPEG2000_T1_SIG_N | JPEG2000_T1_SIG_E | \
86 JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_W | \
87 JPEG2000_T1_SIG_NE | JPEG2000_T1_SIG_NW | \
88 JPEG2000_T1_SIG_SE | JPEG2000_T1_SIG_SW)
89 // flags determining sign bit of neighbor coefficients
90 #define JPEG2000_T1_SGN_N 0x0100
91 #define JPEG2000_T1_SGN_S 0x0200
92 #define JPEG2000_T1_SGN_W 0x0400
93 #define JPEG2000_T1_SGN_E 0x0800
94
95 #define JPEG2000_T1_VIS 0x1000
96 #define JPEG2000_T1_SIG 0x2000
97 #define JPEG2000_T1_REF 0x4000
98
99 #define JPEG2000_T1_SGN 0x8000
100
101 // Codeblock coding styles
102 #define JPEG2000_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass
103 #define JPEG2000_CBLK_RESET 0x02 // Reset context probabilities
104 #define JPEG2000_CBLK_TERMALL 0x04 // Terminate after each coding pass
105 #define JPEG2000_CBLK_VSC 0x08 // Vertical stripe causal context formation
106 #define JPEG2000_CBLK_PREDTERM 0x10 // Predictable termination
107 #define JPEG2000_CBLK_SEGSYM 0x20 // Segmentation symbols present
108
109 // Coding styles
110 #define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style
111 #define JPEG2000_CSTY_SOP 0x02 // SOP marker present
112 #define JPEG2000_CSTY_EPH 0x04 // EPH marker present
113
114 // Progression orders
115 #define JPEG2000_PGOD_LRCP 0x00 // Layer-resolution level-component-position progression
116 #define JPEG2000_PGOD_RLCP 0x01 // Resolution level-layer-component-position progression
117 #define JPEG2000_PGOD_RPCL 0x02 // Resolution level-position-component-layer progression
118 #define JPEG2000_PGOD_PCRL 0x03 // Position-component-resolution level-layer progression
119 #define JPEG2000_PGOD_CPRL 0x04 // Component-position-resolution level-layer progression
120
121 typedef struct Jpeg2000T1Context {
122 int data[6144];
123 uint16_t flags[6156];
124 MqcState mqc;
125 int stride;
126 } Jpeg2000T1Context;
127
128 typedef struct Jpeg2000TgtNode {
129 uint8_t val;
130 uint8_t temp_val;
131 uint8_t vis;
132 struct Jpeg2000TgtNode *parent;
133 } Jpeg2000TgtNode;
134
135 typedef struct Jpeg2000CodingStyle {
136 int nreslevels; // number of resolution levels
137 int nreslevels2decode; // number of resolution levels to decode
138 uint8_t log2_cblk_width,
139 log2_cblk_height; // exponent of codeblock size
140 uint8_t transform; // DWT type
141 uint8_t csty; // coding style
142 uint8_t nlayers; // number of layers
143 uint8_t mct; // multiple component transformation
144 uint8_t cblk_style; // codeblock coding style
145 uint8_t prog_order; // progression order
146 uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]; // precincts size according resolution levels
147 uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]; // TODO: initialize prec_size array with 0?
148 uint8_t init;
149 } Jpeg2000CodingStyle;
150
151 typedef struct Jpeg2000QuantStyle {
152 uint8_t expn[JPEG2000_MAX_DECLEVELS * 3]; // quantization exponent
153 uint16_t mant[JPEG2000_MAX_DECLEVELS * 3]; // quantization mantissa
154 uint8_t quantsty; // quantization style
155 uint8_t nguardbits; // number of guard bits
156 } Jpeg2000QuantStyle;
157
158 typedef struct Jpeg2000Pass {
159 uint16_t rate;
160 int64_t disto;
161 uint8_t flushed[4];
162 int flushed_len;
163 } Jpeg2000Pass;
164
165 typedef struct Jpeg2000Layer {
166 uint8_t *data_start;
167 int data_len;
168 int npasses;
169 double disto;
170 int cum_passes;
171 } Jpeg2000Layer;
172
173 typedef struct Jpeg2000Cblk {
174 uint8_t npasses;
175 uint8_t ninclpasses; // number coding of passes included in codestream
176 uint8_t nonzerobits;
177 uint8_t incl;
178 uint16_t length;
179 uint16_t *lengthinc;
180 uint8_t nb_lengthinc;
181 uint8_t lblock;
182 uint8_t *data;
183 size_t data_allocated;
184 int nb_terminations;
185 int nb_terminationsinc;
186 int *data_start;
187 Jpeg2000Pass *passes;
188 Jpeg2000Layer *layers;
189 int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
190 } Jpeg2000Cblk; // code block
191
192 typedef struct Jpeg2000Prec {
193 int nb_codeblocks_width;
194 int nb_codeblocks_height;
195 Jpeg2000TgtNode *zerobits;
196 Jpeg2000TgtNode *cblkincl;
197 Jpeg2000Cblk *cblk;
198 int decoded_layers;
199 int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
200 } Jpeg2000Prec; // precinct
201
202 typedef struct Jpeg2000Band {
203 int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
204 uint16_t log2_cblk_width, log2_cblk_height;
205 int i_stepsize; // quantization stepsize
206 float f_stepsize; // quantization stepsize
207 Jpeg2000Prec *prec;
208 } Jpeg2000Band; // subband
209
210 typedef struct Jpeg2000ResLevel {
211 uint8_t nbands;
212 int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
213 int num_precincts_x, num_precincts_y; // number of precincts in x/y direction
214 uint8_t log2_prec_width, log2_prec_height; // exponent of precinct size
215 Jpeg2000Band *band;
216 } Jpeg2000ResLevel; // resolution level
217
218 typedef struct Jpeg2000Component {
219 Jpeg2000ResLevel *reslevel;
220 DWTContext dwt;
221 float *f_data;
222 int *i_data;
223 int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- can be reduced with lowres option
224 int coord_o[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- original values from jpeg2000 headers
225 uint8_t roi_shift; // ROI scaling value for the component
226 } Jpeg2000Component;
227
228 /* misc tools */
229 980870 static inline int ff_jpeg2000_ceildivpow2(int a, int b)
230 {
231 980870 return -((-(int64_t)a) >> b);
232 }
233
234 586429 static inline int ff_jpeg2000_ceildiv(int a, int64_t b)
235 {
236 586429 return (a + b - 1) / b;
237 }
238
239 /* TIER-1 routines */
240
241 /* Set up lookup tables used in TIER-1. */
242 void ff_jpeg2000_init_tier1_luts(void);
243
244 /* Update significance of a coefficient at current position (x,y) and
245 * for neighbors. */
246 void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1,
247 int x, int y, int negative);
248
249 extern uint8_t ff_jpeg2000_sigctxno_lut[256][4];
250
251 /* Get context label (number in range[0..8]) of a coefficient for significance
252 * propagation and cleanup coding passes. */
253 361592122 static inline int ff_jpeg2000_getsigctxno(int flag, int bandno)
254 {
255 361592122 return ff_jpeg2000_sigctxno_lut[flag & 255][bandno];
256 }
257
258 static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } };
259
260 /* Get context label (number in range[14..16]) of a coefficient for magnitude
261 * refinement pass. */
262 173222089 static inline int ff_jpeg2000_getrefctxno(int flag)
263 {
264 173222089 return refctxno_lut[(flag >> 14) & 1][(flag & 255) != 0];
265 }
266
267 extern uint8_t ff_jpeg2000_sgnctxno_lut[16][16];
268 extern uint8_t ff_jpeg2000_xorbit_lut[16][16];
269
270 /* Get context label (number in range[9..13]) for sign decoding. */
271 97353026 static inline int ff_jpeg2000_getsgnctxno(int flag, int *xorbit)
272 {
273 97353026 *xorbit = ff_jpeg2000_xorbit_lut[flag & 15][(flag >> 8) & 15];
274 97353026 return ff_jpeg2000_sgnctxno_lut[flag & 15][(flag >> 8) & 15];
275 }
276
277 int ff_jpeg2000_init_component(Jpeg2000Component *comp,
278 Jpeg2000CodingStyle *codsty,
279 Jpeg2000QuantStyle *qntsty,
280 int cbps, int dx, int dy,
281 AVCodecContext *ctx);
282
283 void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
284
285 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
286
287 5192469 static inline int needs_termination(int style, int passno) {
288
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5192469 if (style & JPEG2000_CBLK_BYPASS) {
289 int type = passno % 3;
290 passno /= 3;
291 if (type == 0 && passno > 2)
292 return 2;
293 if (type == 2 && passno > 2)
294 return 1;
295 if (style & JPEG2000_CBLK_TERMALL) {
296 return passno > 2 ? 2 : 1;
297 }
298 }
299
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5192469 if (style & JPEG2000_CBLK_TERMALL)
300 return 1;
301 5192469 return 0;
302 }
303
304 void ff_tag_tree_zero(Jpeg2000TgtNode *t, int w, int h, int val);
305
306 #endif /* AVCODEC_JPEG2000_H */
307