FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mjpegenc_common.c
Date: 2025-11-10 16:28:23
Exec Total Coverage
Lines: 237 276 85.9%
Functions: 11 11 100.0%
Branches: 101 140 72.1%
Line Branch Exec Source
1 /*
2 * lossless JPEG shared bits
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
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 #include <stdint.h>
24 #include <string.h>
25
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/pixfmt.h"
28
29 #include "avcodec.h"
30 #include "idctdsp.h"
31 #include "jpegtables.h"
32 #include "put_bits.h"
33 #include "mjpegenc.h"
34 #include "mjpegenc_common.h"
35 #include "mjpeg.h"
36 #include "version.h"
37
38 /* table_class: 0 = DC coef, 1 = AC coefs */
39 5756 static int put_huffman_table(PutBitContext *p, int table_class, int table_id,
40 const uint8_t *bits_table, const uint8_t *value_table)
41 {
42 5756 int n = 0;
43
44 5756 put_bits(p, 4, table_class);
45 5756 put_bits(p, 4, table_id);
46
47
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 97852 for (int i = 1; i <= 16; i++) {
48 92096 n += bits_table[i];
49 92096 put_bits(p, 8, bits_table[i]);
50 }
51
52
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 289758 for (int i = 0; i < n; i++)
53 284002 put_bits(p, 8, value_table[i]);
54
55 5756 return n + 17;
56 }
57
58 1439 static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p,
59 const MJpegContext *m,
60 const uint8_t intra_matrix_permutation[64],
61 const uint16_t luma_intra_matrix[64],
62 const uint16_t chroma_intra_matrix[64],
63 int hsample[3], int use_slices, int matrices_differ)
64 {
65 int size;
66 uint8_t *ptr;
67
68
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 1439 if (m) {
69 1239 int matrix_count = 1 + matrices_differ;
70
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 1239 if (m->force_duplicated_matrix)
71 ✗ matrix_count = 2;
72 /* quant matrixes */
73 1239 put_marker(p, DQT);
74 1239 put_bits(p, 16, 2 + matrix_count * (1 + 64));
75 1239 put_bits(p, 4, 0); /* 8 bit precision */
76 1239 put_bits(p, 4, 0); /* table 0 */
77
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 80535 for (int i = 0; i < 64; i++) {
78 79296 uint8_t j = intra_matrix_permutation[i];
79 79296 put_bits(p, 8, luma_intra_matrix[j]);
80 }
81
82
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 1239 if (matrix_count > 1) {
83 ✗ put_bits(p, 4, 0); /* 8 bit precision */
84 ✗ put_bits(p, 4, 1); /* table 1 */
85 ✗ for (int i = 0; i < 64; i++) {
86 ✗ uint8_t j = intra_matrix_permutation[i];
87 ✗ put_bits(p, 8, chroma_intra_matrix[j]);
88 }
89 }
90 }
91
92
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 1439 if (use_slices) {
93 200 put_marker(p, DRI);
94 200 put_bits(p, 16, 4);
95 200 put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1);
96 }
97
98 /* huffman table */
99 1439 put_marker(p, DHT);
100 1439 flush_put_bits(p);
101 1439 ptr = put_bits_ptr(p);
102 1439 put_bits(p, 16, 0); /* patched later */
103 1439 size = 2;
104
105 // Only MJPEG can have a variable Huffman variable. All other
106 // formats use the default Huffman table.
107
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 1439 if (m && m->huffman == HUFFMAN_TABLE_OPTIMAL) {
108 1678 size += put_huffman_table(p, 0, 0, m->bits_dc_luminance,
109 839 m->val_dc_luminance);
110 1678 size += put_huffman_table(p, 0, 1, m->bits_dc_chrominance,
111 839 m->val_dc_chrominance);
112
113 1678 size += put_huffman_table(p, 1, 0, m->bits_ac_luminance,
114 839 m->val_ac_luminance);
115 1678 size += put_huffman_table(p, 1, 1, m->bits_ac_chrominance,
116 839 m->val_ac_chrominance);
117 } else {
118 600 size += put_huffman_table(p, 0, 0, ff_mjpeg_bits_dc_luminance,
119 ff_mjpeg_val_dc);
120 600 size += put_huffman_table(p, 0, 1, ff_mjpeg_bits_dc_chrominance,
121 ff_mjpeg_val_dc);
122
123 600 size += put_huffman_table(p, 1, 0, ff_mjpeg_bits_ac_luminance,
124 ff_mjpeg_val_ac_luminance);
125 600 size += put_huffman_table(p, 1, 1, ff_mjpeg_bits_ac_chrominance,
126 ff_mjpeg_val_ac_chrominance);
127 }
128 1439 AV_WB16(ptr, size);
129 1439 }
130
131 enum {
132 ICC_HDR_SIZE = 16, /* ICC_PROFILE\0 tag + 4 bytes */
133 ICC_CHUNK_SIZE = UINT16_MAX - ICC_HDR_SIZE,
134 ICC_MAX_CHUNKS = UINT8_MAX,
135 };
136
137 1439 int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
138 size_t *max_pkt_size)
139 {
140 const AVFrameSideData *sd;
141 size_t new_pkt_size;
142 int nb_chunks;
143 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
144
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 1439 if (!sd || !sd->size)
145 1438 return 0;
146
147
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 1 if (sd->size > ICC_MAX_CHUNKS * ICC_CHUNK_SIZE) {
148 ✗ av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC "
149 "profile: too large for JPEG\n",
150 ✗ sd->size);
151 ✗ return AVERROR_INVALIDDATA;
152 }
153
154 1 nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
155 1 new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */);
156
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 1 if (new_pkt_size < *max_pkt_size) /* overflow */
157 ✗ return AVERROR_INVALIDDATA;
158 1 *max_pkt_size = new_pkt_size;
159 1 return 0;
160 }
161
162 1439 static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p,
163 const AVFrame *frame)
164 {
165 1439 const AVFrameSideData *sd = NULL;
166 int size;
167 uint8_t *ptr;
168
169
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 1439 if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
170 1 AVRational sar = avctx->sample_aspect_ratio;
171
172
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 1 if (sar.num > 65535 || sar.den > 65535) {
173 ✗ if (!av_reduce(&sar.num, &sar.den, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 65535))
174 ✗ av_log(avctx, AV_LOG_WARNING,
175 "Cannot store exact aspect ratio %d:%d\n",
176 avctx->sample_aspect_ratio.num,
177 avctx->sample_aspect_ratio.den);
178 }
179
180 /* JFIF header */
181 1 put_marker(p, APP0);
182 1 put_bits(p, 16, 16);
183 1 ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
184 /* The most significant byte is used for major revisions, the least
185 * significant byte for minor revisions. Version 1.02 is the current
186 * released revision. */
187 1 put_bits(p, 16, 0x0102);
188 1 put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
189 1 put_bits(p, 16, sar.num);
190 1 put_bits(p, 16, sar.den);
191 1 put_bits(p, 8, 0); /* thumbnail width */
192 1 put_bits(p, 8, 0); /* thumbnail height */
193 }
194
195 /* ICC profile */
196 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
197
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 1439 if (sd && sd->size) {
198 1 const int nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
199 1 const uint8_t *data = sd->data;
200 1 size_t remaining = sd->size;
201 /* must already be checked by the packat allocation code */
202
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 1 av_assert0(remaining <= ICC_MAX_CHUNKS * ICC_CHUNK_SIZE);
203 1 flush_put_bits(p);
204
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 2 for (int i = 0; i < nb_chunks; i++) {
205 1 size = FFMIN(remaining, ICC_CHUNK_SIZE);
206 av_assert1(size > 0);
207 1 ptr = put_bits_ptr(p);
208 1 ptr[0] = 0xff; /* chunk marker, not part of ICC_HDR_SIZE */
209 1 ptr[1] = APP2;
210 1 AV_WB16(ptr+2, size + ICC_HDR_SIZE);
211 1 AV_WL32(ptr+4, MKTAG('I','C','C','_'));
212 1 AV_WL32(ptr+8, MKTAG('P','R','O','F'));
213 1 AV_WL32(ptr+12, MKTAG('I','L','E','\0'));
214 1 ptr[16] = i+1;
215 1 ptr[17] = nb_chunks;
216 1 memcpy(&ptr[18], data, size);
217 1 skip_put_bytes(p, size + ICC_HDR_SIZE + 2);
218 1 remaining -= size;
219 1 data += size;
220 }
221 av_assert1(!remaining);
222 }
223
224 /* comment */
225
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 1439 if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
226 ✗ put_marker(p, COM);
227 ✗ flush_put_bits(p);
228 ✗ ptr = put_bits_ptr(p);
229 ✗ put_bits(p, 16, 0); /* patched later */
230 ✗ ff_put_string(p, LIBAVCODEC_IDENT, 1);
231 ✗ size = strlen(LIBAVCODEC_IDENT)+3;
232 ✗ AV_WB16(ptr, size);
233 }
234
235
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 1439 if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
236
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 1214 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
237
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 1439 avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
238
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 1239 || avctx->color_range == AVCOL_RANGE_MPEG) {
239 200 put_marker(p, COM);
240 200 flush_put_bits(p);
241 200 ptr = put_bits_ptr(p);
242 200 put_bits(p, 16, 0); /* patched later */
243 200 ff_put_string(p, "CS=ITU601", 1);
244 200 size = strlen("CS=ITU601")+3;
245 200 AV_WB16(ptr, size);
246 }
247 1439 }
248
249 1643 void ff_mjpeg_init_hvsample(const AVCodecContext *avctx, int hsample[4], int vsample[4])
250 {
251
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 1643 if (avctx->codec_id == AV_CODEC_ID_LJPEG &&
252
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 204 ( avctx->pix_fmt == AV_PIX_FMT_BGR0
253
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 204 || avctx->pix_fmt == AV_PIX_FMT_BGRA
254
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 204 || avctx->pix_fmt == AV_PIX_FMT_BGR24)) {
255 ✗ vsample[0] = hsample[0] =
256 ✗ vsample[1] = hsample[1] =
257 ✗ vsample[2] = hsample[2] =
258 ✗ vsample[3] = hsample[3] = 1;
259
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 1643 } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) {
260 201 vsample[0] = vsample[1] = vsample[2] = 2;
261 201 hsample[0] = hsample[1] = hsample[2] = 1;
262 } else {
263 int chroma_h_shift, chroma_v_shift;
264 1442 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
265 &chroma_v_shift);
266 1442 vsample[0] = 2;
267 1442 vsample[1] = 2 >> chroma_v_shift;
268 1442 vsample[2] = 2 >> chroma_v_shift;
269 1442 hsample[0] = 2;
270 1442 hsample[1] = 2 >> chroma_h_shift;
271 1442 hsample[2] = 2 >> chroma_h_shift;
272 }
273 1643 }
274
275 1639 void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
276 const AVFrame *frame, const struct MJpegContext *m,
277 const uint8_t intra_matrix_permutation[64], int pred,
278 const uint16_t luma_intra_matrix[64],
279 const uint16_t chroma_intra_matrix[64],
280 int use_slices)
281 {
282 1639 const int lossless = !m;
283 int hsample[4], vsample[4];
284
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 1639 int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA);
285 int chroma_matrix;
286
287 1639 ff_mjpeg_init_hvsample(avctx, hsample, vsample);
288
289 1639 put_marker(pb, SOI);
290
291 // hack for AMV mjpeg format
292
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 1639 if (avctx->codec_id == AV_CODEC_ID_AMV)
293 200 return;
294
295 1439 jpeg_put_comments(avctx, pb, frame);
296
297
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 1439 chroma_matrix = !lossless && !!memcmp(luma_intra_matrix,
298 chroma_intra_matrix,
299 sizeof(luma_intra_matrix[0]) * 64);
300 1439 jpeg_table_header(avctx, pb, m, intra_matrix_permutation,
301 luma_intra_matrix, chroma_intra_matrix, hsample,
302 use_slices, chroma_matrix);
303
304
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 1439 switch (avctx->codec_id) {
305 1239 case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
306 200 case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
307 ✗ default: av_unreachable("ff_mjpeg_encode_picture_header only called by "
308 "AMV, LJPEG, MJPEG and the former has been ruled out");
309 }
310
311 1439 put_bits(pb, 16, 8 + 3 * components);
312
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 1439 if (lossless && ( avctx->pix_fmt == AV_PIX_FMT_BGR0
313
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 200 || avctx->pix_fmt == AV_PIX_FMT_BGRA
314
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 200 || avctx->pix_fmt == AV_PIX_FMT_BGR24))
315 ✗ put_bits(pb, 8, 9); /* 9 bits/component RCT */
316 else
317 1439 put_bits(pb, 8, 8); /* 8 bits/component */
318 1439 put_bits(pb, 16, avctx->height);
319 1439 put_bits(pb, 16, avctx->width);
320 1439 put_bits(pb, 8, components); /* 3 or 4 components */
321
322 /* Y component */
323 1439 put_bits(pb, 8, 1); /* component number */
324 1439 put_bits(pb, 4, hsample[0]); /* H factor */
325 1439 put_bits(pb, 4, vsample[0]); /* V factor */
326 1439 put_bits(pb, 8, 0); /* select matrix */
327
328 /* Cb component */
329 1439 put_bits(pb, 8, 2); /* component number */
330 1439 put_bits(pb, 4, hsample[1]); /* H factor */
331 1439 put_bits(pb, 4, vsample[1]); /* V factor */
332
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 1439 put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
333
334 /* Cr component */
335 1439 put_bits(pb, 8, 3); /* component number */
336 1439 put_bits(pb, 4, hsample[2]); /* H factor */
337 1439 put_bits(pb, 4, vsample[2]); /* V factor */
338
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 1439 put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
339
340
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 1439 if (components == 4) {
341 ✗ put_bits(pb, 8, 4); /* component number */
342 ✗ put_bits(pb, 4, hsample[3]); /* H factor */
343 ✗ put_bits(pb, 4, vsample[3]); /* V factor */
344 ✗ put_bits(pb, 8, 0); /* select matrix */
345 }
346
347 /* scan header */
348 1439 put_marker(pb, SOS);
349 1439 put_bits(pb, 16, 6 + 2*components); /* length */
350 1439 put_bits(pb, 8, components); /* 3 components */
351
352 /* Y component */
353 1439 put_bits(pb, 8, 1); /* index */
354 1439 put_bits(pb, 4, 0); /* DC huffman table index */
355 1439 put_bits(pb, 4, 0); /* AC huffman table index */
356
357 /* Cb component */
358 1439 put_bits(pb, 8, 2); /* index */
359 1439 put_bits(pb, 4, 1); /* DC huffman table index */
360 1439 put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
361
362 /* Cr component */
363 1439 put_bits(pb, 8, 3); /* index */
364 1439 put_bits(pb, 4, 1); /* DC huffman table index */
365 1439 put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
366
367
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 1439 if (components == 4) {
368 /* Alpha component */
369 ✗ put_bits(pb, 8, 4); /* index */
370 ✗ put_bits(pb, 4, 0); /* DC huffman table index */
371 ✗ put_bits(pb, 4, 0); /* AC huffman table index */
372 }
373
374 1439 put_bits(pb, 8, pred); /* Ss (not used); pred only nonzero for LJPEG */
375
376
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 1439 switch (avctx->codec_id) {
377 1239 case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
378 200 case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
379 ✗ default: av_unreachable("Only LJPEG, MJPEG possible here");
380 }
381
382 1439 put_bits(pb, 8, 0); /* Ah/Al (not used) */
383 }
384
385 4289 void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
386 {
387 int size;
388 int i, ff_count;
389 4289 uint8_t *buf = pb->buf + start;
390 4289 int align= (-(size_t)(buf))&3;
391 4289 int pad = (-put_bits_count(pb))&7;
392
393
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 4289 if (pad)
394 3739 put_bits(pb, pad, (1<<pad)-1);
395
396 4289 flush_put_bits(pb);
397 4289 size = put_bytes_output(pb) - start;
398
399 4289 ff_count=0;
400
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 11075 for(i=0; i<size && i<align; i++){
401
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 6786 if(buf[i]==0xFF) ff_count++;
402 }
403
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 2348904 for(; i<size-15; i+=16){
404 int acc, v;
405
406 2344615 v= *(uint32_t*)(&buf[i]);
407 2344615 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
408 2344615 v= *(uint32_t*)(&buf[i+4]);
409 2344615 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
410 2344615 v= *(uint32_t*)(&buf[i+8]);
411 2344615 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
412 2344615 v= *(uint32_t*)(&buf[i+12]);
413 2344615 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
414
415 2344615 acc>>=4;
416 2344615 acc+= (acc>>16);
417 2344615 acc+= (acc>>8);
418 2344615 ff_count+= acc&0xFF;
419 }
420
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 36134 for(; i<size; i++){
421
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 31845 if(buf[i]==0xFF) ff_count++;
422 }
423
424
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 4289 if(ff_count==0) return;
425
426 4220 skip_put_bytes(pb, ff_count);
427
428
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 36422944 for(i=size-1; ff_count; i--){
429 36418724 int v= buf[i];
430
431
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 36418724 if(v==0xFF){
432 165648 buf[i+ff_count]= 0;
433 165648 ff_count--;
434 }
435
436 36418724 buf[i+ff_count]= v;
437 }
438 }
439
440 /* isn't this function nicer than the one in the libjpeg ? */
441 3488 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
442 const uint8_t *bits_table,
443 const uint8_t *val_table)
444 {
445 int k, code;
446
447 3488 k = 0;
448 3488 code = 0;
449
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 59296 for (int i = 1; i <= 16; i++) {
450 55808 int nb = bits_table[i];
451
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 141894 for (int j = 0; j < nb; j++) {
452 86086 int sym = val_table[k++];
453 86086 huff_size[sym] = i;
454 86086 huff_code[sym] = code;
455 86086 code++;
456 }
457 55808 code <<= 1;
458 }
459 3488 }
460
461 1639 void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
462 {
463 av_assert1((header_bits & 7) == 0);
464
465 1639 put_marker(pb, EOI);
466 1639 }
467
468 23973600 void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
469 const uint8_t huff_size[], const uint16_t huff_code[])
470 {
471 int mant, nbits;
472
473
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 23973600 if (val == 0) {
474 2724153 put_bits(pb, huff_size[0], huff_code[0]);
475 } else {
476 21249447 mant = val;
477
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 21249447 if (val < 0) {
478 9257064 val = -val;
479 9257064 mant--;
480 }
481
482 21249447 nbits= av_log2_16bit(val) + 1;
483
484 21249447 put_bits(pb, huff_size[nbits], huff_code[nbits]);
485
486 21249447 put_sbits(pb, nbits, mant);
487 }
488 23973600 }
489
490 35 int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx)
491 {
492
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 35 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
493
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 27 avctx->color_range != AVCOL_RANGE_JPEG &&
494 ✗ (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
495 ✗ avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
496 ✗ avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
497 ✗ avctx->color_range == AVCOL_RANGE_MPEG)) {
498 ✗ av_log(avctx, AV_LOG_ERROR,
499 "Non full-range YUV is non-standard, set strict_std_compliance "
500 "to at most unofficial to use it.\n");
501 ✗ return AVERROR(EINVAL);
502 }
503 35 return 0;
504 }
505