FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mjpegenc.c
Date: 2025-03-08 20:38:41
Exec Total Coverage
Lines: 292 325 89.8%
Functions: 16 16 100.0%
Branches: 94 120 78.3%
Line Branch Exec Source
1 /*
2 * MJPEG encoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
6 *
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
9 * by Alex Beregszaszi
10 *
11 * This file is part of FFmpeg.
12 *
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
17 *
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
22 *
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 */
27
28 /**
29 * @file
30 * MJPEG encoder.
31 */
32
33 #include "config_components.h"
34
35 #include "libavutil/mem.h"
36
37 #include "avcodec.h"
38 #include "codec_internal.h"
39 #include "jpegtables.h"
40 #include "mjpegenc_common.h"
41 #include "mjpegenc_huffman.h"
42 #include "mpegvideo.h"
43 #include "mjpeg.h"
44 #include "mjpegenc.h"
45 #include "mpegvideoenc.h"
46 #include "profiles.h"
47
48 /**
49 * Buffer of JPEG frame data.
50 *
51 * Optimal Huffman table generation requires the frame data to be loaded into
52 * a buffer so that the tables can be computed.
53 * There are at most mb_width*mb_height*12*64 of these per frame.
54 */
55 typedef struct MJpegHuffmanCode {
56 // 0=DC lum, 1=DC chrom, 2=AC lum, 3=AC chrom
57 uint8_t table_id; ///< The Huffman table id associated with the data.
58 uint8_t code; ///< The exponent.
59 uint16_t mant; ///< The mantissa.
60 } MJpegHuffmanCode;
61
62 /* The following is the private context of MJPEG/AMV decoder.
63 * Note that when using slice threading only the main thread's
64 * MpegEncContext is followed by a MjpegContext; the other threads
65 * can access this shared context via MpegEncContext.mjpeg. */
66 typedef struct MJPEGEncContext {
67 MpegEncContext mpeg;
68 MJpegContext mjpeg;
69 } MJPEGEncContext;
70
71 2540 static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256],
72 uint8_t *uni_ac_vlc_len)
73 {
74
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 327660 for (int i = 0; i < 128; i++) {
75 325120 int level = i - 64;
76
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 325120 if (!level)
77 2540 continue;
78
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 20967700 for (int run = 0; run < 64; run++) {
79 int len, code, nbits;
80 20645120 int alevel = FFABS(level);
81
82 20645120 len = (run >> 4) * huff_size_ac[0xf0];
83
84 20645120 nbits= av_log2_16bit(alevel) + 1;
85 20645120 code = ((15&run) << 4) | nbits;
86
87 20645120 len += huff_size_ac[code] + nbits;
88
89 20645120 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
90 // We ignore EOB as its just a constant which does not change generally
91 }
92 }
93 2540 }
94
95 1439 static void mjpeg_encode_picture_header(MpegEncContext *s)
96 {
97 1439 ff_mjpeg_encode_picture_header(s->avctx, &s->pb, s->cur_pic.ptr->f, s->mjpeg_ctx,
98 1439 s->intra_scantable.permutated, 0,
99 1439 s->intra_matrix, s->chroma_intra_matrix,
100 1439 s->slice_context_count > 1);
101
102 1439 s->esc_pos = put_bytes_count(&s->pb, 0);
103
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 1439 for (int i = 1; i < s->slice_context_count; i++)
104 ✗ s->thread_context[i]->esc_pos = 0;
105 1439 }
106
107 1439 void ff_mjpeg_amv_encode_picture_header(MpegEncContext *s)
108 {
109 1439 MJPEGEncContext *const m = (MJPEGEncContext*)s;
110 av_assert2(s->mjpeg_ctx == &m->mjpeg);
111 /* s->huffman == HUFFMAN_TABLE_OPTIMAL can only be true for MJPEG. */
112
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 1439 if (!CONFIG_MJPEG_ENCODER || m->mjpeg.huffman != HUFFMAN_TABLE_OPTIMAL)
113 200 mjpeg_encode_picture_header(s);
114 1439 }
115
116 #if CONFIG_MJPEG_ENCODER
117 /**
118 * Encodes and outputs the entire frame in the JPEG format.
119 *
120 * @param s The MpegEncContext.
121 */
122 1239 static void mjpeg_encode_picture_frame(MpegEncContext *s)
123 {
124 int nbits, code, table_id;
125 1239 MJpegContext *m = s->mjpeg_ctx;
126 1239 uint8_t *huff_size[4] = { m->huff_size_dc_luminance,
127 1239 m->huff_size_dc_chrominance,
128 1239 m->huff_size_ac_luminance,
129 1239 m->huff_size_ac_chrominance };
130 1239 uint16_t *huff_code[4] = { m->huff_code_dc_luminance,
131 1239 m->huff_code_dc_chrominance,
132 1239 m->huff_code_ac_luminance,
133 1239 m->huff_code_ac_chrominance };
134 1239 size_t total_bits = 0;
135 size_t bytes_needed;
136
137 1239 s->header_bits = get_bits_diff(s);
138 // Estimate the total size first
139
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 28825865 for (int i = 0; i < m->huff_ncode; i++) {
140 28824626 table_id = m->huff_buffer[i].table_id;
141 28824626 code = m->huff_buffer[i].code;
142 28824626 nbits = code & 0xf;
143
144 28824626 total_bits += huff_size[table_id][code] + nbits;
145 }
146
147 1239 bytes_needed = (total_bits + 7) / 8;
148 1239 ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
149
150
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 28825865 for (int i = 0; i < m->huff_ncode; i++) {
151 28824626 table_id = m->huff_buffer[i].table_id;
152 28824626 code = m->huff_buffer[i].code;
153 28824626 nbits = code & 0xf;
154
155 28824626 put_bits(&s->pb, huff_size[table_id][code], huff_code[table_id][code]);
156
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 28824626 if (nbits != 0) {
157 26020528 put_sbits(&s->pb, nbits, m->huff_buffer[i].mant);
158 }
159 }
160
161 1239 m->huff_ncode = 0;
162 1239 s->i_tex_bits = get_bits_diff(s);
163 1239 }
164
165 /**
166 * Builds all 4 optimal Huffman tables.
167 *
168 * Uses the data stored in the JPEG buffer to compute the tables.
169 * Stores the Huffman tables in the bits_* and val_* arrays in the MJpegContext.
170 *
171 * @param m MJpegContext containing the JPEG buffer.
172 */
173 1239 static void mjpeg_build_optimal_huffman(MJpegContext *m)
174 {
175 MJpegEncHuffmanContext dc_luminance_ctx;
176 MJpegEncHuffmanContext dc_chrominance_ctx;
177 MJpegEncHuffmanContext ac_luminance_ctx;
178 MJpegEncHuffmanContext ac_chrominance_ctx;
179 1239 MJpegEncHuffmanContext *ctx[4] = { &dc_luminance_ctx,
180 &dc_chrominance_ctx,
181 &ac_luminance_ctx,
182 &ac_chrominance_ctx };
183
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 6195 for (int i = 0; i < 4; i++)
184 4956 ff_mjpeg_encode_huffman_init(ctx[i]);
185
186
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 28825865 for (int i = 0; i < m->huff_ncode; i++) {
187 28824626 int table_id = m->huff_buffer[i].table_id;
188 28824626 int code = m->huff_buffer[i].code;
189
190 28824626 ff_mjpeg_encode_huffman_increment(ctx[table_id], code);
191 }
192
193 1239 ff_mjpeg_encode_huffman_close(&dc_luminance_ctx,
194 1239 m->bits_dc_luminance,
195 1239 m->val_dc_luminance, 12);
196 1239 ff_mjpeg_encode_huffman_close(&dc_chrominance_ctx,
197 1239 m->bits_dc_chrominance,
198 1239 m->val_dc_chrominance, 12);
199 1239 ff_mjpeg_encode_huffman_close(&ac_luminance_ctx,
200 1239 m->bits_ac_luminance,
201 1239 m->val_ac_luminance, 256);
202 1239 ff_mjpeg_encode_huffman_close(&ac_chrominance_ctx,
203 1239 m->bits_ac_chrominance,
204 1239 m->val_ac_chrominance, 256);
205
206 1239 ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
207 1239 m->huff_code_dc_luminance,
208 1239 m->bits_dc_luminance,
209 1239 m->val_dc_luminance);
210 1239 ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
211 1239 m->huff_code_dc_chrominance,
212 1239 m->bits_dc_chrominance,
213 1239 m->val_dc_chrominance);
214 1239 ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
215 1239 m->huff_code_ac_luminance,
216 1239 m->bits_ac_luminance,
217 1239 m->val_ac_luminance);
218 1239 ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
219 1239 m->huff_code_ac_chrominance,
220 1239 m->bits_ac_chrominance,
221 1239 m->val_ac_chrominance);
222 1239 }
223 #endif
224
225 /**
226 * Writes the complete JPEG frame when optimal huffman tables are enabled,
227 * otherwise writes the stuffing.
228 *
229 * Header + values + stuffing.
230 *
231 * @param s The MpegEncContext.
232 * @return int Error code, 0 if successful.
233 */
234 1439 int ff_mjpeg_encode_stuffing(MpegEncContext *s)
235 {
236 1439 MJpegContext *const m = s->mjpeg_ctx;
237 1439 PutBitContext *pbc = &s->pb;
238 1439 int mb_y = s->mb_y - !s->mb_x;
239 int ret;
240
241 #if CONFIG_MJPEG_ENCODER
242
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 1439 if (m->huffman == HUFFMAN_TABLE_OPTIMAL) {
243
244 1239 mjpeg_build_optimal_huffman(m);
245
246 // Replace the VLCs with the optimal ones.
247 // The default ones may be used for trellis during quantization.
248 1239 init_uni_ac_vlc(m->huff_size_ac_luminance, m->uni_ac_vlc_len);
249 1239 init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
250 1239 s->intra_ac_vlc_length =
251 1239 s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
252 1239 s->intra_chroma_ac_vlc_length =
253 1239 s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
254
255 1239 mjpeg_encode_picture_header(s);
256 1239 mjpeg_encode_picture_frame(s);
257 }
258 #endif
259
260 1439 ret = ff_mpv_reallocate_putbitbuffer(s, put_bits_count(&s->pb) / 8 + 100,
261 1439 put_bits_count(&s->pb) / 4 + 1000);
262
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 1439 if (ret < 0) {
263 ✗ av_log(s->avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");
264 ✗ goto fail;
265 }
266
267 1439 ff_mjpeg_escape_FF(pbc, s->esc_pos);
268
269
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 1439 if (s->slice_context_count > 1 && mb_y < s->mb_height - 1)
270 ✗ put_marker(pbc, RST0 + (mb_y&7));
271 1439 s->esc_pos = put_bytes_count(pbc, 0);
272
273 1439 fail:
274
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 5756 for (int i = 0; i < 3; i++)
275 4317 s->last_dc[i] = 128 << s->intra_dc_precision;
276
277 1439 return ret;
278 }
279
280 27 static int alloc_huffman(MpegEncContext *s)
281 {
282 27 MJpegContext *m = s->mjpeg_ctx;
283 size_t num_mbs, num_blocks, num_codes;
284 int blocks_per_mb;
285
286 // We need to init this here as the mjpeg init is called before the common init,
287 27 s->mb_width = (s->width + 15) / 16;
288 27 s->mb_height = (s->height + 15) / 16;
289
290
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 27 switch (s->chroma_format) {
291 18 case CHROMA_420: blocks_per_mb = 6; break;
292 4 case CHROMA_422: blocks_per_mb = 8; break;
293 5 case CHROMA_444: blocks_per_mb = 12; break;
294 ✗ default: av_assert0(0);
295 };
296
297 // Make sure we have enough space to hold this frame.
298 27 num_mbs = s->mb_width * s->mb_height;
299 27 num_blocks = num_mbs * blocks_per_mb;
300 27 num_codes = num_blocks * 64;
301
302 27 m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
303
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 27 if (!m->huff_buffer)
304 ✗ return AVERROR(ENOMEM);
305 27 return 0;
306 }
307
308 31 av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
309 {
310 31 MJpegContext *const m = &((MJPEGEncContext*)s)->mjpeg;
311 int ret, use_slices;
312
313 31 s->mjpeg_ctx = m;
314
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 62 use_slices = s->avctx->slices > 0 ? s->avctx->slices > 1 :
315
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 31 (s->avctx->active_thread_type & FF_THREAD_SLICE) &&
316 ✗ s->avctx->thread_count > 1;
317
318
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 31 if (use_slices)
319 ✗ m->huffman = HUFFMAN_TABLE_DEFAULT;
320
321
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 31 if (s->mpv_flags & FF_MPV_FLAG_QP_RD) {
322 // Used to produce garbage with MJPEG.
323 ✗ av_log(s->avctx, AV_LOG_ERROR,
324 "QP RD is no longer compatible with MJPEG or AMV\n");
325 ✗ return AVERROR(EINVAL);
326 }
327
328 /* The following check is automatically true for AMV,
329 * but it doesn't hurt either. */
330 31 ret = ff_mjpeg_encode_check_pix_fmt(s->avctx);
331
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 31 if (ret < 0)
332 ✗ return ret;
333
334
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 31 if (s->width > 65500 || s->height > 65500) {
335 ✗ av_log(s->avctx, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
336 ✗ return AVERROR(EINVAL);
337 }
338
339 31 s->min_qcoeff=-1023;
340 31 s->max_qcoeff= 1023;
341
342 // Build default Huffman tables.
343 // These may be overwritten later with more optimal Huffman tables, but
344 // they are needed at least right now for some processes like trellis.
345 31 ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
346 31 m->huff_code_dc_luminance,
347 ff_mjpeg_bits_dc_luminance,
348 ff_mjpeg_val_dc);
349 31 ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
350 31 m->huff_code_dc_chrominance,
351 ff_mjpeg_bits_dc_chrominance,
352 ff_mjpeg_val_dc);
353 31 ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
354 31 m->huff_code_ac_luminance,
355 ff_mjpeg_bits_ac_luminance,
356 ff_mjpeg_val_ac_luminance);
357 31 ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
358 31 m->huff_code_ac_chrominance,
359 ff_mjpeg_bits_ac_chrominance,
360 ff_mjpeg_val_ac_chrominance);
361
362 31 init_uni_ac_vlc(m->huff_size_ac_luminance, m->uni_ac_vlc_len);
363 31 init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
364 31 s->intra_ac_vlc_length =
365 31 s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
366 31 s->intra_chroma_ac_vlc_length =
367 31 s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
368
369 // Buffers start out empty.
370 31 m->huff_ncode = 0;
371
372
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 31 if (m->huffman == HUFFMAN_TABLE_OPTIMAL)
373 27 return alloc_huffman(s);
374
375 4 return 0;
376 }
377
378 31 static av_cold int mjpeg_encode_close(AVCodecContext *avctx)
379 {
380 31 MJPEGEncContext *const mjpeg = avctx->priv_data;
381 31 av_freep(&mjpeg->mjpeg.huff_buffer);
382 31 ff_mpv_encode_end(avctx);
383 31 return 0;
384 }
385
386 /**
387 * Add code and table_id to the JPEG buffer.
388 *
389 * @param s The MJpegContext which contains the JPEG buffer.
390 * @param table_id Which Huffman table the code belongs to.
391 * @param code The encoded exponent of the coefficients and the run-bits.
392 */
393 28824626 static inline void mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
394 {
395 28824626 MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
396 28824626 c->table_id = table_id;
397 28824626 c->code = code;
398 28824626 }
399
400 /**
401 * Add the coefficient's data to the JPEG buffer.
402 *
403 * @param s The MJpegContext which contains the JPEG buffer.
404 * @param table_id Which Huffman table the code belongs to.
405 * @param val The coefficient.
406 * @param run The run-bits.
407 */
408 26124099 static void mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
409 {
410 int mant, code;
411
412
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 26124099 if (val == 0) {
413
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 103571 av_assert0(run == 0);
414 103571 mjpeg_encode_code(s, table_id, 0);
415 } else {
416 26020528 mant = val;
417
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 26020528 if (val < 0) {
418 12990396 val = -val;
419 12990396 mant--;
420 }
421
422 26020528 code = (run << 4) | (av_log2_16bit(val) + 1);
423
424 26020528 s->huff_buffer[s->huff_ncode].mant = mant;
425 26020528 mjpeg_encode_code(s, table_id, code);
426 }
427 26124099 }
428
429 /**
430 * Add the block's data into the JPEG buffer.
431 *
432 * @param s The MpegEncContext that contains the JPEG buffer.
433 * @param block The block.
434 * @param n The block's index or number.
435 */
436 2723556 static void record_block(MpegEncContext *s, int16_t *block, int n)
437 {
438 int i, j, table_id;
439 int component, dc, last_index, val, run;
440 2723556 MJpegContext *m = s->mjpeg_ctx;
441
442 /* DC coef */
443
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 2723556 component = (n <= 3 ? 0 : (n&1) + 1);
444 2723556 table_id = (n <= 3 ? 0 : 1);
445 2723556 dc = block[0]; /* overflow is impossible */
446 2723556 val = dc - s->last_dc[component];
447
448 2723556 mjpeg_encode_coef(m, table_id, val, 0);
449
450 2723556 s->last_dc[component] = dc;
451
452 /* AC coefs */
453
454 2723556 run = 0;
455 2723556 last_index = s->block_last_index[n];
456 2723556 table_id |= 2;
457
458
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 52781629 for(i=1;i<=last_index;i++) {
459 50058073 j = s->intra_scantable.permutated[i];
460 50058073 val = block[j];
461
462
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 50058073 if (val == 0) {
463 26657530 run++;
464 } else {
465
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 23457328 while (run >= 16) {
466 56785 mjpeg_encode_code(m, table_id, 0xf0);
467 56785 run -= 16;
468 }
469 23400543 mjpeg_encode_coef(m, table_id, val, run);
470 23400543 run = 0;
471 }
472 }
473
474 /* output EOB only if not already 64 values */
475
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 2723556 if (last_index < 63 || run != 0)
476 2643742 mjpeg_encode_code(m, table_id, 0);
477 2723556 }
478
479 359100 static void encode_block(MpegEncContext *s, int16_t *block, int n)
480 {
481 int mant, nbits, code, i, j;
482 int component, dc, run, last_index, val;
483 359100 const MJpegContext *const m = s->mjpeg_ctx;
484 const uint16_t *huff_code_ac;
485 const uint8_t *huff_size_ac;
486
487 /* DC coef */
488
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 359100 component = (n <= 3 ? 0 : (n&1) + 1);
489 359100 dc = block[0]; /* overflow is impossible */
490 359100 val = dc - s->last_dc[component];
491
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 359100 if (n < 4) {
492 239400 ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
493 239400 huff_size_ac = m->huff_size_ac_luminance;
494 239400 huff_code_ac = m->huff_code_ac_luminance;
495 } else {
496 119700 ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
497 119700 huff_size_ac = m->huff_size_ac_chrominance;
498 119700 huff_code_ac = m->huff_code_ac_chrominance;
499 }
500 359100 s->last_dc[component] = dc;
501
502 /* AC coefs */
503
504 359100 run = 0;
505 359100 last_index = s->block_last_index[n];
506
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 6879553 for(i=1;i<=last_index;i++) {
507 6520453 j = s->intra_scantable.permutated[i];
508 6520453 val = block[j];
509
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 6520453 if (val == 0) {
510 3000562 run++;
511 } else {
512
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 3522896 while (run >= 16) {
513 3005 put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
514 3005 run -= 16;
515 }
516 3519891 mant = val;
517
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 3519891 if (val < 0) {
518 1776500 val = -val;
519 1776500 mant--;
520 }
521
522 3519891 nbits= av_log2_16bit(val) + 1;
523 3519891 code = (run << 4) | nbits;
524
525 3519891 put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
526
527 3519891 put_sbits(&s->pb, nbits, mant);
528 3519891 run = 0;
529 }
530 }
531
532 /* output EOB only if not already 64 values */
533
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 359100 if (last_index < 63 || run != 0)
534 344418 put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
535 359100 }
536
537 434062 void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
538 {
539 int i;
540
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 434062 if (s->mjpeg_ctx->huffman == HUFFMAN_TABLE_OPTIMAL) {
541
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 374212 if (s->chroma_format == CHROMA_444) {
542 59914 record_block(s, block[0], 0);
543 59914 record_block(s, block[2], 2);
544 59914 record_block(s, block[4], 4);
545 59914 record_block(s, block[8], 8);
546 59914 record_block(s, block[5], 5);
547 59914 record_block(s, block[9], 9);
548
549
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 59914 if (16*s->mb_x+8 < s->width) {
550 59764 record_block(s, block[1], 1);
551 59764 record_block(s, block[3], 3);
552 59764 record_block(s, block[6], 6);
553 59764 record_block(s, block[10], 10);
554 59764 record_block(s, block[7], 7);
555 59764 record_block(s, block[11], 11);
556 }
557 } else {
558
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 1885788 for(i=0;i<5;i++) {
559 1571490 record_block(s, block[i], i);
560 }
561
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 314298 if (s->chroma_format == CHROMA_420) {
562 254448 record_block(s, block[5], 5);
563 } else {
564 59850 record_block(s, block[6], 6);
565 59850 record_block(s, block[5], 5);
566 59850 record_block(s, block[7], 7);
567 }
568 }
569 } else {
570
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 59850 if (s->chroma_format == CHROMA_444) {
571 ✗ encode_block(s, block[0], 0);
572 ✗ encode_block(s, block[2], 2);
573 ✗ encode_block(s, block[4], 4);
574 ✗ encode_block(s, block[8], 8);
575 ✗ encode_block(s, block[5], 5);
576 ✗ encode_block(s, block[9], 9);
577
578 ✗ if (16*s->mb_x+8 < s->width) {
579 ✗ encode_block(s, block[1], 1);
580 ✗ encode_block(s, block[3], 3);
581 ✗ encode_block(s, block[6], 6);
582 ✗ encode_block(s, block[10], 10);
583 ✗ encode_block(s, block[7], 7);
584 ✗ encode_block(s, block[11], 11);
585 }
586 } else {
587
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 359100 for(i=0;i<5;i++) {
588 299250 encode_block(s, block[i], i);
589 }
590
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 59850 if (s->chroma_format == CHROMA_420) {
591 59850 encode_block(s, block[5], 5);
592 } else {
593 ✗ encode_block(s, block[6], 6);
594 ✗ encode_block(s, block[5], 5);
595 ✗ encode_block(s, block[7], 7);
596 }
597 }
598
599 59850 s->i_tex_bits += get_bits_diff(s);
600 }
601 434062 }
602
603 #if CONFIG_AMV_ENCODER
604 // maximum over s->mjpeg_vsample[i]
605 #define V_MAX 2
606 200 static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
607 const AVFrame *pic_arg, int *got_packet)
608 {
609 200 MpegEncContext *s = avctx->priv_data;
610 AVFrame *pic;
611 int i, ret;
612 200 int chroma_v_shift = 1; /* AMV is 420-only */
613
614
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 200 if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
615 ✗ av_log(avctx, AV_LOG_ERROR,
616 "Heights which are not a multiple of 16 might fail with some decoders, "
617 "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
618 ✗ av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
619 "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
620 ✗ return AVERROR_EXPERIMENTAL;
621 }
622
623 200 pic = av_frame_clone(pic_arg);
624
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 200 if (!pic)
625 ✗ return AVERROR(ENOMEM);
626 //picture should be flipped upside-down
627
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 800 for(i=0; i < 3; i++) {
628
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 600 int vsample = i ? 2 >> chroma_v_shift : 2;
629 600 pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
630 600 pic->linesize[i] *= -1;
631 }
632 200 ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
633 200 av_frame_free(&pic);
634 200 return ret;
635 }
636 #endif
637
638 #define OFFSET(x) offsetof(MJPEGEncContext, mjpeg.x)
639 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
640 static const AVOption options[] = {
641 #define AMV_OPTIONS_OFFSET 4
642 { "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, .unit = "huffman" },
643 { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, .unit = "huffman" },
644 { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, .unit = "huffman" },
645 { "force_duplicated_matrix", "Always write luma and chroma matrix for mjpeg, useful for rtp streaming.", OFFSET(force_duplicated_matrix), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
646 FF_MPV_COMMON_OPTS
647 { NULL},
648 };
649
650 #if CONFIG_MJPEG_ENCODER
651 static const AVClass mjpeg_class = {
652 .class_name = "mjpeg encoder",
653 .item_name = av_default_item_name,
654 .option = options,
655 .version = LIBAVUTIL_VERSION_INT,
656 };
657
658 16586 static int mjpeg_get_supported_config(const AVCodecContext *avctx,
659 const AVCodec *codec,
660 enum AVCodecConfig config,
661 unsigned flags, const void **out,
662 int *out_num)
663 {
664
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 16586 if (config == AV_CODEC_CONFIG_COLOR_RANGE) {
665 static const enum AVColorRange mjpeg_ranges[] = {
666 AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG, AVCOL_RANGE_UNSPECIFIED,
667 };
668
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 27 int strict = avctx ? avctx->strict_std_compliance : 0;
669 27 int index = strict > FF_COMPLIANCE_UNOFFICIAL ? 1 : 0;
670 27 *out = &mjpeg_ranges[index];
671 27 *out_num = FF_ARRAY_ELEMS(mjpeg_ranges) - index - 1;
672 27 return 0;
673 }
674
675 16559 return ff_default_get_supported_config(avctx, codec, config, flags, out, out_num);
676 }
677
678 FFCodec ff_mjpeg_encoder = {
679 .p.name = "mjpeg",
680 CODEC_LONG_NAME("MJPEG (Motion JPEG)"),
681 .p.type = AVMEDIA_TYPE_VIDEO,
682 .p.id = AV_CODEC_ID_MJPEG,
683 .priv_data_size = sizeof(MJPEGEncContext),
684 .init = ff_mpv_encode_init,
685 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
686 .close = mjpeg_encode_close,
687 .p.capabilities = AV_CODEC_CAP_DR1 |
688 AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS |
689 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
690 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_ICC_PROFILES,
691 .p.pix_fmts = (const enum AVPixelFormat[]) {
692 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
693 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
694 AV_PIX_FMT_NONE
695 },
696 .p.priv_class = &mjpeg_class,
697 .p.profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
698 .get_supported_config = mjpeg_get_supported_config,
699 };
700 #endif
701
702 #if CONFIG_AMV_ENCODER
703 static const AVClass amv_class = {
704 .class_name = "amv encoder",
705 .item_name = av_default_item_name,
706 .option = options + AMV_OPTIONS_OFFSET,
707 .version = LIBAVUTIL_VERSION_INT,
708 };
709
710 const FFCodec ff_amv_encoder = {
711 .p.name = "amv",
712 CODEC_LONG_NAME("AMV Video"),
713 .p.type = AVMEDIA_TYPE_VIDEO,
714 .p.id = AV_CODEC_ID_AMV,
715 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
716 .priv_data_size = sizeof(MJPEGEncContext),
717 .init = ff_mpv_encode_init,
718 FF_CODEC_ENCODE_CB(amv_encode_picture),
719 .close = mjpeg_encode_close,
720 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
721 .p.pix_fmts = (const enum AVPixelFormat[]) {
722 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
723 },
724 .color_ranges = AVCOL_RANGE_JPEG,
725 .p.priv_class = &amv_class,
726 };
727 #endif
728