FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mjpegenc_common.c
Date: 2022-07-07 01:21:54
Exec Total Coverage
Lines: 235 277 84.8%
Branches: 94 138 68.1%

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 int n, i;
43
44 5756 put_bits(p, 4, table_class);
45 5756 put_bits(p, 4, table_id);
46
47 5756 n = 0;
48
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97852 for(i=1;i<=16;i++) {
49 92096 n += bits_table[i];
50 92096 put_bits(p, 8, bits_table[i]);
51 }
52
53
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185043 for(i=0;i<n;i++)
54 179287 put_bits(p, 8, value_table[i]);
55
56 5756 return n + 17;
57 }
58
59 1439 static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p,
60 MJpegContext *m,
61 ScanTable *intra_scantable,
62 uint16_t luma_intra_matrix[64],
63 uint16_t chroma_intra_matrix[64],
64 int hsample[3], int use_slices)
65 {
66 int i, j, size;
67 uint8_t *ptr;
68
69
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1439 if (m) {
70
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1239 int matrix_count = 1 + !!memcmp(luma_intra_matrix,
71 chroma_intra_matrix,
72 sizeof(luma_intra_matrix[0]) * 64);
73
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1239 if (m->force_duplicated_matrix)
74 matrix_count = 2;
75 /* quant matrixes */
76 1239 put_marker(p, DQT);
77 1239 put_bits(p, 16, 2 + matrix_count * (1 + 64));
78 1239 put_bits(p, 4, 0); /* 8 bit precision */
79 1239 put_bits(p, 4, 0); /* table 0 */
80
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80535 for (int i = 0; i < 64; i++) {
81 79296 uint8_t j = intra_scantable->permutated[i];
82 79296 put_bits(p, 8, luma_intra_matrix[j]);
83 }
84
85
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1239 if (matrix_count > 1) {
86 put_bits(p, 4, 0); /* 8 bit precision */
87 put_bits(p, 4, 1); /* table 1 */
88 for(i=0;i<64;i++) {
89 j = intra_scantable->permutated[i];
90 put_bits(p, 8, chroma_intra_matrix[j]);
91 }
92 }
93 }
94
95
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1439 if (use_slices) {
96 put_marker(p, DRI);
97 put_bits(p, 16, 4);
98 put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1);
99 }
100
101 /* huffman table */
102 1439 put_marker(p, DHT);
103 1439 flush_put_bits(p);
104 1439 ptr = put_bits_ptr(p);
105 1439 put_bits(p, 16, 0); /* patched later */
106 1439 size = 2;
107
108 // Only MJPEG can have a variable Huffman variable. All other
109 // formats use the default Huffman table.
110
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1439 if (m && m->huffman == HUFFMAN_TABLE_OPTIMAL) {
111 2478 size += put_huffman_table(p, 0, 0, m->bits_dc_luminance,
112 1239 m->val_dc_luminance);
113 2478 size += put_huffman_table(p, 0, 1, m->bits_dc_chrominance,
114 1239 m->val_dc_chrominance);
115
116 2478 size += put_huffman_table(p, 1, 0, m->bits_ac_luminance,
117 1239 m->val_ac_luminance);
118 2478 size += put_huffman_table(p, 1, 1, m->bits_ac_chrominance,
119 1239 m->val_ac_chrominance);
120 } else {
121 200 size += put_huffman_table(p, 0, 0, ff_mjpeg_bits_dc_luminance,
122 ff_mjpeg_val_dc);
123 200 size += put_huffman_table(p, 0, 1, ff_mjpeg_bits_dc_chrominance,
124 ff_mjpeg_val_dc);
125
126 200 size += put_huffman_table(p, 1, 0, ff_mjpeg_bits_ac_luminance,
127 ff_mjpeg_val_ac_luminance);
128 200 size += put_huffman_table(p, 1, 1, ff_mjpeg_bits_ac_chrominance,
129 ff_mjpeg_val_ac_chrominance);
130 }
131 1439 AV_WB16(ptr, size);
132 1439 }
133
134 enum {
135 ICC_HDR_SIZE = 16, /* ICC_PROFILE\0 tag + 4 bytes */
136 ICC_CHUNK_SIZE = UINT16_MAX - ICC_HDR_SIZE,
137 ICC_MAX_CHUNKS = UINT8_MAX,
138 };
139
140 1439 int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
141 size_t *max_pkt_size)
142 {
143 const AVFrameSideData *sd;
144 size_t new_pkt_size;
145 int nb_chunks;
146 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
147
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1439 if (!sd || !sd->size)
148 1438 return 0;
149
150
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1 if (sd->size > ICC_MAX_CHUNKS * ICC_CHUNK_SIZE) {
151 av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC "
152 "profile: too large for JPEG\n",
153 sd->size);
154 return AVERROR_INVALIDDATA;
155 }
156
157 1 nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
158 1 new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */);
159
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1 if (new_pkt_size < *max_pkt_size) /* overflow */
160 return AVERROR_INVALIDDATA;
161 1 *max_pkt_size = new_pkt_size;
162 1 return 0;
163 }
164
165 1439 static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p,
166 const AVFrame *frame)
167 {
168 1439 const AVFrameSideData *sd = NULL;
169 int size;
170 uint8_t *ptr;
171
172
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1439 if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
173 1 AVRational sar = avctx->sample_aspect_ratio;
174
175
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1 if (sar.num > 65535 || sar.den > 65535) {
176 if (!av_reduce(&sar.num, &sar.den, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 65535))
177 av_log(avctx, AV_LOG_WARNING,
178 "Cannot store exact aspect ratio %d:%d\n",
179 avctx->sample_aspect_ratio.num,
180 avctx->sample_aspect_ratio.den);
181 }
182
183 /* JFIF header */
184 1 put_marker(p, APP0);
185 1 put_bits(p, 16, 16);
186 1 ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
187 /* The most significant byte is used for major revisions, the least
188 * significant byte for minor revisions. Version 1.02 is the current
189 * released revision. */
190 1 put_bits(p, 16, 0x0102);
191 1 put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
192 1 put_bits(p, 16, sar.num);
193 1 put_bits(p, 16, sar.den);
194 1 put_bits(p, 8, 0); /* thumbnail width */
195 1 put_bits(p, 8, 0); /* thumbnail height */
196 }
197
198 /* ICC profile */
199 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
200
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1439 if (sd && sd->size) {
201 1 const int nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
202 1 const uint8_t *data = sd->data;
203 1 size_t remaining = sd->size;
204 /* must already be checked by the packat allocation code */
205
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1 av_assert0(remaining <= ICC_MAX_CHUNKS * ICC_CHUNK_SIZE);
206 1 flush_put_bits(p);
207
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2 for (int i = 0; i < nb_chunks; i++) {
208 1 size = FFMIN(remaining, ICC_CHUNK_SIZE);
209 av_assert1(size > 0);
210 1 ptr = put_bits_ptr(p);
211 1 ptr[0] = 0xff; /* chunk marker, not part of ICC_HDR_SIZE */
212 1 ptr[1] = APP2;
213 1 AV_WB16(ptr+2, size + ICC_HDR_SIZE);
214 1 AV_WL32(ptr+4, MKTAG('I','C','C','_'));
215 1 AV_WL32(ptr+8, MKTAG('P','R','O','F'));
216 1 AV_WL32(ptr+12, MKTAG('I','L','E','\0'));
217 1 ptr[16] = i+1;
218 1 ptr[17] = nb_chunks;
219 1 memcpy(&ptr[18], data, size);
220 1 skip_put_bytes(p, size + ICC_HDR_SIZE + 2);
221 1 remaining -= size;
222 1 data += size;
223 }
224 av_assert1(!remaining);
225 }
226
227 /* comment */
228
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1439 if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
229 put_marker(p, COM);
230 flush_put_bits(p);
231 ptr = put_bits_ptr(p);
232 put_bits(p, 16, 0); /* patched later */
233 ff_put_string(p, LIBAVCODEC_IDENT, 1);
234 size = strlen(LIBAVCODEC_IDENT)+3;
235 AV_WB16(ptr, size);
236 }
237
238
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1439 if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
239
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1239 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
240
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1439 avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
241
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1239 || avctx->color_range == AVCOL_RANGE_MPEG) {
242 200 put_marker(p, COM);
243 200 flush_put_bits(p);
244 200 ptr = put_bits_ptr(p);
245 200 put_bits(p, 16, 0); /* patched later */
246 200 ff_put_string(p, "CS=ITU601", 1);
247 200 size = strlen("CS=ITU601")+3;
248 200 AV_WB16(ptr, size);
249 }
250 1439 }
251
252 1643 void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
253 {
254
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1643 if (avctx->codec_id == AV_CODEC_ID_LJPEG &&
255
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204 ( avctx->pix_fmt == AV_PIX_FMT_BGR0
256
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204 || avctx->pix_fmt == AV_PIX_FMT_BGRA
257
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204 || avctx->pix_fmt == AV_PIX_FMT_BGR24)) {
258 vsample[0] = hsample[0] =
259 vsample[1] = hsample[1] =
260 vsample[2] = hsample[2] =
261 vsample[3] = hsample[3] = 1;
262
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1643 } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) {
263 201 vsample[0] = vsample[1] = vsample[2] = 2;
264 201 hsample[0] = hsample[1] = hsample[2] = 1;
265 } else {
266 int chroma_h_shift, chroma_v_shift;
267 1442 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
268 &chroma_v_shift);
269 1442 vsample[0] = 2;
270 1442 vsample[1] = 2 >> chroma_v_shift;
271 1442 vsample[2] = 2 >> chroma_v_shift;
272 1442 hsample[0] = 2;
273 1442 hsample[1] = 2 >> chroma_h_shift;
274 1442 hsample[2] = 2 >> chroma_h_shift;
275 }
276 1643 }
277
278 1639 void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
279 const AVFrame *frame, struct MJpegContext *m,
280 ScanTable *intra_scantable, int pred,
281 uint16_t luma_intra_matrix[64],
282 uint16_t chroma_intra_matrix[64],
283 int use_slices)
284 {
285 1639 const int lossless = !m;
286 int hsample[4], vsample[4];
287
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1639 int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA);
288 1639 int chroma_matrix = !!memcmp(luma_intra_matrix,
289 chroma_intra_matrix,
290 sizeof(luma_intra_matrix[0])*64);
291
292 1639 ff_mjpeg_init_hvsample(avctx, hsample, vsample);
293
294 1639 put_marker(pb, SOI);
295
296 // hack for AMV mjpeg format
297
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1639 if (avctx->codec_id == AV_CODEC_ID_AMV)
298 200 return;
299
300 1439 jpeg_put_comments(avctx, pb, frame);
301
302 1439 jpeg_table_header(avctx, pb, m, intra_scantable,
303 luma_intra_matrix, chroma_intra_matrix, hsample,
304 use_slices);
305
306
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1439 switch (avctx->codec_id) {
307 1239 case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
308 200 case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
309 default: av_assert0(0);
310 }
311
312 1439 put_bits(pb, 16, 17);
313
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1439 if (lossless && ( avctx->pix_fmt == AV_PIX_FMT_BGR0
314
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200 || avctx->pix_fmt == AV_PIX_FMT_BGRA
315
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200 || avctx->pix_fmt == AV_PIX_FMT_BGR24))
316 put_bits(pb, 8, 9); /* 9 bits/component RCT */
317 else
318 1439 put_bits(pb, 8, 8); /* 8 bits/component */
319 1439 put_bits(pb, 16, avctx->height);
320 1439 put_bits(pb, 16, avctx->width);
321 1439 put_bits(pb, 8, components); /* 3 or 4 components */
322
323 /* Y component */
324 1439 put_bits(pb, 8, 1); /* component number */
325 1439 put_bits(pb, 4, hsample[0]); /* H factor */
326 1439 put_bits(pb, 4, vsample[0]); /* V factor */
327 1439 put_bits(pb, 8, 0); /* select matrix */
328
329 /* Cb component */
330 1439 put_bits(pb, 8, 2); /* component number */
331 1439 put_bits(pb, 4, hsample[1]); /* H factor */
332 1439 put_bits(pb, 4, vsample[1]); /* V factor */
333
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1439 put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
334
335 /* Cr component */
336 1439 put_bits(pb, 8, 3); /* component number */
337 1439 put_bits(pb, 4, hsample[2]); /* H factor */
338 1439 put_bits(pb, 4, vsample[2]); /* V factor */
339
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1439 put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
340
341
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1439 if (components == 4) {
342 put_bits(pb, 8, 4); /* component number */
343 put_bits(pb, 4, hsample[3]); /* H factor */
344 put_bits(pb, 4, vsample[3]); /* V factor */
345 put_bits(pb, 8, 0); /* select matrix */
346 }
347
348 /* scan header */
349 1439 put_marker(pb, SOS);
350 1439 put_bits(pb, 16, 6 + 2*components); /* length */
351 1439 put_bits(pb, 8, components); /* 3 components */
352
353 /* Y component */
354 1439 put_bits(pb, 8, 1); /* index */
355 1439 put_bits(pb, 4, 0); /* DC huffman table index */
356 1439 put_bits(pb, 4, 0); /* AC huffman table index */
357
358 /* Cb component */
359 1439 put_bits(pb, 8, 2); /* index */
360 1439 put_bits(pb, 4, 1); /* DC huffman table index */
361 1439 put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
362
363 /* Cr component */
364 1439 put_bits(pb, 8, 3); /* index */
365 1439 put_bits(pb, 4, 1); /* DC huffman table index */
366 1439 put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
367
368
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1439 if (components == 4) {
369 /* Alpha component */
370 put_bits(pb, 8, 4); /* index */
371 put_bits(pb, 4, 0); /* DC huffman table index */
372 put_bits(pb, 4, 0); /* AC huffman table index */
373 }
374
375 1439 put_bits(pb, 8, pred); /* Ss (not used); pred only nonzero for LJPEG */
376
377
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1439 switch (avctx->codec_id) {
378 1239 case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
379 200 case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
380 default: av_assert0(0);
381 }
382
383 1439 put_bits(pb, 8, 0); /* Ah/Al (not used) */
384 }
385
386 1639 void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
387 {
388 int size;
389 int i, ff_count;
390 1639 uint8_t *buf = pb->buf + start;
391 1639 int align= (-(size_t)(buf))&3;
392 1639 int pad = (-put_bits_count(pb))&7;
393
394
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1639 if (pad)
395 1420 put_bits(pb, pad, (1<<pad)-1);
396
397 1639 flush_put_bits(pb);
398 1639 size = put_bytes_output(pb) - start;
399
400 1639 ff_count=0;
401
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4488 for(i=0; i<size && i<align; i++){
402
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2849 if(buf[i]==0xFF) ff_count++;
403 }
404
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2331745 for(; i<size-15; i+=16){
405 int acc, v;
406
407 2330106 v= *(uint32_t*)(&buf[i]);
408 2330106 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
409 2330106 v= *(uint32_t*)(&buf[i+4]);
410 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
411 2330106 v= *(uint32_t*)(&buf[i+8]);
412 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
413 2330106 v= *(uint32_t*)(&buf[i+12]);
414 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
415
416 2330106 acc>>=4;
417 2330106 acc+= (acc>>16);
418 2330106 acc+= (acc>>8);
419 2330106 ff_count+= acc&0xFF;
420 }
421
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13699 for(; i<size; i++){
422
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12060 if(buf[i]==0xFF) ff_count++;
423 }
424
425
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1639 if(ff_count==0) return;
426
427 1608 flush_put_bits(pb);
428 1608 skip_put_bytes(pb, ff_count);
429
430
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36528946 for(i=size-1; ff_count; i--){
431 36527338 int v= buf[i];
432
433
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36527338 if(v==0xFF){
434 138346 buf[i+ff_count]= 0;
435 138346 ff_count--;
436 }
437
438 36527338 buf[i+ff_count]= v;
439 }
440 }
441
442 /* isn't this function nicer than the one in the libjpeg ? */
443 5088 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
444 const uint8_t *bits_table,
445 const uint8_t *val_table)
446 {
447 int k, code;
448
449 5088 k = 0;
450 5088 code = 0;
451
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86496 for (int i = 1; i <= 16; i++) {
452 81408 int nb = bits_table[i];
453
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201979 for (int j = 0; j < nb; j++) {
454 120571 int sym = val_table[k++];
455 120571 huff_size[sym] = i;
456 120571 huff_code[sym] = code;
457 120571 code++;
458 }
459 81408 code <<= 1;
460 }
461 5088 }
462
463 1639 void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
464 {
465 av_assert1((header_bits & 7) == 0);
466
467 1639 put_marker(pb, EOI);
468 1639 }
469
470 23255400 void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
471 uint8_t *huff_size, uint16_t *huff_code)
472 {
473 int mant, nbits;
474
475
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23255400 if (val == 0) {
476 2701595 put_bits(pb, huff_size[0], huff_code[0]);
477 } else {
478 20553805 mant = val;
479
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20553805 if (val < 0) {
480 8922845 val = -val;
481 8922845 mant--;
482 }
483
484 20553805 nbits= av_log2_16bit(val) + 1;
485
486 20553805 put_bits(pb, huff_size[nbits], huff_code[nbits]);
487
488 20553805 put_sbits(pb, nbits, mant);
489 }
490 23255400 }
491
492 35 int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx)
493 {
494
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35 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
495
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27 avctx->color_range != AVCOL_RANGE_JPEG &&
496 (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
497 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
498 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
499 avctx->color_range == AVCOL_RANGE_MPEG)) {
500 av_log(avctx, AV_LOG_ERROR,
501 "Non full-range YUV is non-standard, set strict_std_compliance "
502 "to at most unofficial to use it.\n");
503 return AVERROR(EINVAL);
504 }
505 35 return 0;
506 }
507