FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mjpegenc_common.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 234 276 84.8%
Branches: 96 140 68.6%

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 const uint8_t intra_matrix_permutation[64],
62 uint16_t luma_intra_matrix[64],
63 uint16_t chroma_intra_matrix[64],
64 int hsample[3], int use_slices, int matrices_differ)
65 {
66 int i, j, size;
67 uint8_t *ptr;
68
69
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1439 if (m) {
70 1239 int matrix_count = 1 + matrices_differ;
71
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1239 if (m->force_duplicated_matrix)
72 matrix_count = 2;
73 /* quant matrixes */
74 1239 put_marker(p, DQT);
75 1239 put_bits(p, 16, 2 + matrix_count * (1 + 64));
76 1239 put_bits(p, 4, 0); /* 8 bit precision */
77 1239 put_bits(p, 4, 0); /* table 0 */
78
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80535 for (int i = 0; i < 64; i++) {
79 79296 uint8_t j = intra_matrix_permutation[i];
80 79296 put_bits(p, 8, luma_intra_matrix[j]);
81 }
82
83
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1239 if (matrix_count > 1) {
84 put_bits(p, 4, 0); /* 8 bit precision */
85 put_bits(p, 4, 1); /* table 1 */
86 for(i=0;i<64;i++) {
87 j = intra_matrix_permutation[i];
88 put_bits(p, 8, chroma_intra_matrix[j]);
89 }
90 }
91 }
92
93
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1439 if (use_slices) {
94 put_marker(p, DRI);
95 put_bits(p, 16, 4);
96 put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1);
97 }
98
99 /* huffman table */
100 1439 put_marker(p, DHT);
101 1439 flush_put_bits(p);
102 1439 ptr = put_bits_ptr(p);
103 1439 put_bits(p, 16, 0); /* patched later */
104 1439 size = 2;
105
106 // Only MJPEG can have a variable Huffman variable. All other
107 // formats use the default Huffman table.
108
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1439 if (m && m->huffman == HUFFMAN_TABLE_OPTIMAL) {
109 2478 size += put_huffman_table(p, 0, 0, m->bits_dc_luminance,
110 1239 m->val_dc_luminance);
111 2478 size += put_huffman_table(p, 0, 1, m->bits_dc_chrominance,
112 1239 m->val_dc_chrominance);
113
114 2478 size += put_huffman_table(p, 1, 0, m->bits_ac_luminance,
115 1239 m->val_ac_luminance);
116 2478 size += put_huffman_table(p, 1, 1, m->bits_ac_chrominance,
117 1239 m->val_ac_chrominance);
118 } else {
119 200 size += put_huffman_table(p, 0, 0, ff_mjpeg_bits_dc_luminance,
120 ff_mjpeg_val_dc);
121 200 size += put_huffman_table(p, 0, 1, ff_mjpeg_bits_dc_chrominance,
122 ff_mjpeg_val_dc);
123
124 200 size += put_huffman_table(p, 1, 0, ff_mjpeg_bits_ac_luminance,
125 ff_mjpeg_val_ac_luminance);
126 200 size += put_huffman_table(p, 1, 1, ff_mjpeg_bits_ac_chrominance,
127 ff_mjpeg_val_ac_chrominance);
128 }
129 1439 AV_WB16(ptr, size);
130 1439 }
131
132 enum {
133 ICC_HDR_SIZE = 16, /* ICC_PROFILE\0 tag + 4 bytes */
134 ICC_CHUNK_SIZE = UINT16_MAX - ICC_HDR_SIZE,
135 ICC_MAX_CHUNKS = UINT8_MAX,
136 };
137
138 1439 int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
139 size_t *max_pkt_size)
140 {
141 const AVFrameSideData *sd;
142 size_t new_pkt_size;
143 int nb_chunks;
144 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
145
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1439 if (!sd || !sd->size)
146 1438 return 0;
147
148
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1 if (sd->size > ICC_MAX_CHUNKS * ICC_CHUNK_SIZE) {
149 av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC "
150 "profile: too large for JPEG\n",
151 sd->size);
152 return AVERROR_INVALIDDATA;
153 }
154
155 1 nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
156 1 new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */);
157
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1 if (new_pkt_size < *max_pkt_size) /* overflow */
158 return AVERROR_INVALIDDATA;
159 1 *max_pkt_size = new_pkt_size;
160 1 return 0;
161 }
162
163 1439 static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p,
164 const AVFrame *frame)
165 {
166 1439 const AVFrameSideData *sd = NULL;
167 int size;
168 uint8_t *ptr;
169
170
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1439 if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
171 1 AVRational sar = avctx->sample_aspect_ratio;
172
173
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1 if (sar.num > 65535 || sar.den > 65535) {
174 if (!av_reduce(&sar.num, &sar.den, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 65535))
175 av_log(avctx, AV_LOG_WARNING,
176 "Cannot store exact aspect ratio %d:%d\n",
177 avctx->sample_aspect_ratio.num,
178 avctx->sample_aspect_ratio.den);
179 }
180
181 /* JFIF header */
182 1 put_marker(p, APP0);
183 1 put_bits(p, 16, 16);
184 1 ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
185 /* The most significant byte is used for major revisions, the least
186 * significant byte for minor revisions. Version 1.02 is the current
187 * released revision. */
188 1 put_bits(p, 16, 0x0102);
189 1 put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
190 1 put_bits(p, 16, sar.num);
191 1 put_bits(p, 16, sar.den);
192 1 put_bits(p, 8, 0); /* thumbnail width */
193 1 put_bits(p, 8, 0); /* thumbnail height */
194 }
195
196 /* ICC profile */
197 1439 sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
198
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1439 if (sd && sd->size) {
199 1 const int nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
200 1 const uint8_t *data = sd->data;
201 1 size_t remaining = sd->size;
202 /* must already be checked by the packat allocation code */
203
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1 av_assert0(remaining <= ICC_MAX_CHUNKS * ICC_CHUNK_SIZE);
204 1 flush_put_bits(p);
205
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2 for (int i = 0; i < nb_chunks; i++) {
206 1 size = FFMIN(remaining, ICC_CHUNK_SIZE);
207 av_assert1(size > 0);
208 1 ptr = put_bits_ptr(p);
209 1 ptr[0] = 0xff; /* chunk marker, not part of ICC_HDR_SIZE */
210 1 ptr[1] = APP2;
211 1 AV_WB16(ptr+2, size + ICC_HDR_SIZE);
212 1 AV_WL32(ptr+4, MKTAG('I','C','C','_'));
213 1 AV_WL32(ptr+8, MKTAG('P','R','O','F'));
214 1 AV_WL32(ptr+12, MKTAG('I','L','E','\0'));
215 1 ptr[16] = i+1;
216 1 ptr[17] = nb_chunks;
217 1 memcpy(&ptr[18], data, size);
218 1 skip_put_bytes(p, size + ICC_HDR_SIZE + 2);
219 1 remaining -= size;
220 1 data += size;
221 }
222 av_assert1(!remaining);
223 }
224
225 /* comment */
226
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1439 if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
227 put_marker(p, COM);
228 flush_put_bits(p);
229 ptr = put_bits_ptr(p);
230 put_bits(p, 16, 0); /* patched later */
231 ff_put_string(p, LIBAVCODEC_IDENT, 1);
232 size = strlen(LIBAVCODEC_IDENT)+3;
233 AV_WB16(ptr, size);
234 }
235
236
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1439 if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
237
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1239 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
238
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1439 avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
239
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1239 || avctx->color_range == AVCOL_RANGE_MPEG) {
240 200 put_marker(p, COM);
241 200 flush_put_bits(p);
242 200 ptr = put_bits_ptr(p);
243 200 put_bits(p, 16, 0); /* patched later */
244 200 ff_put_string(p, "CS=ITU601", 1);
245 200 size = strlen("CS=ITU601")+3;
246 200 AV_WB16(ptr, size);
247 }
248 1439 }
249
250 1643 void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
251 {
252
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1643 if (avctx->codec_id == AV_CODEC_ID_LJPEG &&
253
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204 ( avctx->pix_fmt == AV_PIX_FMT_BGR0
254
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204 || avctx->pix_fmt == AV_PIX_FMT_BGRA
255
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204 || avctx->pix_fmt == AV_PIX_FMT_BGR24)) {
256 vsample[0] = hsample[0] =
257 vsample[1] = hsample[1] =
258 vsample[2] = hsample[2] =
259 vsample[3] = hsample[3] = 1;
260
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1643 } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) {
261 201 vsample[0] = vsample[1] = vsample[2] = 2;
262 201 hsample[0] = hsample[1] = hsample[2] = 1;
263 } else {
264 int chroma_h_shift, chroma_v_shift;
265 1442 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
266 &chroma_v_shift);
267 1442 vsample[0] = 2;
268 1442 vsample[1] = 2 >> chroma_v_shift;
269 1442 vsample[2] = 2 >> chroma_v_shift;
270 1442 hsample[0] = 2;
271 1442 hsample[1] = 2 >> chroma_h_shift;
272 1442 hsample[2] = 2 >> chroma_h_shift;
273 }
274 1643 }
275
276 1639 void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
277 const AVFrame *frame, struct MJpegContext *m,
278 const uint8_t intra_matrix_permutation[64], int pred,
279 uint16_t luma_intra_matrix[64],
280 uint16_t chroma_intra_matrix[64],
281 int use_slices)
282 {
283 1639 const int lossless = !m;
284 int hsample[4], vsample[4];
285
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1639 int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA);
286 int chroma_matrix;
287
288 1639 ff_mjpeg_init_hvsample(avctx, hsample, vsample);
289
290 1639 put_marker(pb, SOI);
291
292 // hack for AMV mjpeg format
293
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1639 if (avctx->codec_id == AV_CODEC_ID_AMV)
294 200 return;
295
296 1439 jpeg_put_comments(avctx, pb, frame);
297
298
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1439 chroma_matrix = !lossless && !!memcmp(luma_intra_matrix,
299 chroma_intra_matrix,
300 sizeof(luma_intra_matrix[0]) * 64);
301 1439 jpeg_table_header(avctx, pb, m, intra_matrix_permutation,
302 luma_intra_matrix, chroma_intra_matrix, hsample,
303 use_slices, chroma_matrix);
304
305
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1439 switch (avctx->codec_id) {
306 1239 case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
307 200 case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
308 default: av_assert0(0);
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_assert0(0);
380 }
381
382 1439 put_bits(pb, 8, 0); /* Ah/Al (not used) */
383 }
384
385 1639 void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
386 {
387 int size;
388 int i, ff_count;
389 1639 uint8_t *buf = pb->buf + start;
390 1639 int align= (-(size_t)(buf))&3;
391 1639 int pad = (-put_bits_count(pb))&7;
392
393
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1639 if (pad)
394 1420 put_bits(pb, pad, (1<<pad)-1);
395
396 1639 flush_put_bits(pb);
397 1639 size = put_bytes_output(pb) - start;
398
399 1639 ff_count=0;
400
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4488 for(i=0; i<size && i<align; i++){
401
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2849 if(buf[i]==0xFF) ff_count++;
402 }
403
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2331745 for(; i<size-15; i+=16){
404 int acc, v;
405
406 2330106 v= *(uint32_t*)(&buf[i]);
407 2330106 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
408 2330106 v= *(uint32_t*)(&buf[i+4]);
409 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
410 2330106 v= *(uint32_t*)(&buf[i+8]);
411 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
412 2330106 v= *(uint32_t*)(&buf[i+12]);
413 2330106 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
414
415 2330106 acc>>=4;
416 2330106 acc+= (acc>>16);
417 2330106 acc+= (acc>>8);
418 2330106 ff_count+= acc&0xFF;
419 }
420
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13699 for(; i<size; i++){
421
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12060 if(buf[i]==0xFF) ff_count++;
422 }
423
424
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1639 if(ff_count==0) return;
425
426 1608 skip_put_bytes(pb, ff_count);
427
428
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36528946 for(i=size-1; ff_count; i--){
429 36527338 int v= buf[i];
430
431
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36527338 if(v==0xFF){
432 138346 buf[i+ff_count]= 0;
433 138346 ff_count--;
434 }
435
436 36527338 buf[i+ff_count]= v;
437 }
438 }
439
440 /* isn't this function nicer than the one in the libjpeg ? */
441 5088 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 5088 k = 0;
448 5088 code = 0;
449
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86496 for (int i = 1; i <= 16; i++) {
450 81408 int nb = bits_table[i];
451
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201979 for (int j = 0; j < nb; j++) {
452 120571 int sym = val_table[k++];
453 120571 huff_size[sym] = i;
454 120571 huff_code[sym] = code;
455 120571 code++;
456 }
457 81408 code <<= 1;
458 }
459 5088 }
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 23255400 void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
469 uint8_t *huff_size, uint16_t *huff_code)
470 {
471 int mant, nbits;
472
473
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23255400 if (val == 0) {
474 2701595 put_bits(pb, huff_size[0], huff_code[0]);
475 } else {
476 20553805 mant = val;
477
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20553805 if (val < 0) {
478 8922845 val = -val;
479 8922845 mant--;
480 }
481
482 20553805 nbits= av_log2_16bit(val) + 1;
483
484 20553805 put_bits(pb, huff_size[nbits], huff_code[nbits]);
485
486 20553805 put_sbits(pb, nbits, mant);
487 }
488 23255400 }
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