GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mjpegenc.c Lines: 270 299 90.3 %
Date: 2021-04-19 06:27:07 Branches: 87 108 80.6 %

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 "libavutil/pixdesc.h"
34
35
#include "avcodec.h"
36
#include "jpegtables.h"
37
#include "mjpegenc_common.h"
38
#include "mjpegenc_huffman.h"
39
#include "mpegvideo.h"
40
#include "mjpeg.h"
41
#include "mjpegenc.h"
42
#include "profiles.h"
43
44
2536
static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256],
45
                                    uint8_t *uni_ac_vlc_len)
46
{
47
327144
    for (int i = 0; i < 128; i++) {
48
324608
        int level = i - 64;
49
324608
        if (!level)
50
2536
            continue;
51
20934680
        for (int run = 0; run < 64; run++) {
52
            int len, code, nbits;
53
20612608
            int alevel = FFABS(level);
54
55
20612608
            len = (run >> 4) * huff_size_ac[0xf0];
56
57
20612608
            nbits= av_log2_16bit(alevel) + 1;
58
20612608
            code = ((15&run) << 4) | nbits;
59
60
20612608
            len += huff_size_ac[code] + nbits;
61
62
20612608
            uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
63
            // We ignore EOB as its just a constant which does not change generally
64
        }
65
    }
66
2536
}
67
68
#if CONFIG_MJPEG_ENCODER
69
/**
70
 * Encodes and outputs the entire frame in the JPEG format.
71
 *
72
 * @param s The MpegEncContext.
73
 */
74
1238
static void mjpeg_encode_picture_frame(MpegEncContext *s)
75
{
76
    int nbits, code, table_id;
77
1238
    MJpegContext *m = s->mjpeg_ctx;
78
1238
    uint8_t  *huff_size[4] = { m->huff_size_dc_luminance,
79
1238
                               m->huff_size_dc_chrominance,
80
1238
                               m->huff_size_ac_luminance,
81
1238
                               m->huff_size_ac_chrominance };
82
1238
    uint16_t *huff_code[4] = { m->huff_code_dc_luminance,
83
1238
                               m->huff_code_dc_chrominance,
84
1238
                               m->huff_code_ac_luminance,
85
1238
                               m->huff_code_ac_chrominance };
86
1238
    size_t total_bits = 0;
87
    size_t bytes_needed;
88
89
1238
    s->header_bits = get_bits_diff(s);
90
    // Estimate the total size first
91
28812345
    for (int i = 0; i < m->huff_ncode; i++) {
92
28811107
        table_id = m->huff_buffer[i].table_id;
93
28811107
        code = m->huff_buffer[i].code;
94
28811107
        nbits = code & 0xf;
95
96
28811107
        total_bits += huff_size[table_id][code] + nbits;
97
    }
98
99
1238
    bytes_needed = (total_bits + 7) / 8;
100
1238
    ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
101
102
28812345
    for (int i = 0; i < m->huff_ncode; i++) {
103
28811107
        table_id = m->huff_buffer[i].table_id;
104
28811107
        code = m->huff_buffer[i].code;
105
28811107
        nbits = code & 0xf;
106
107
28811107
        put_bits(&s->pb, huff_size[table_id][code], huff_code[table_id][code]);
108
28811107
        if (nbits != 0) {
109
26007642
            put_sbits(&s->pb, nbits, m->huff_buffer[i].mant);
110
        }
111
    }
112
113
1238
    m->huff_ncode = 0;
114
1238
    s->i_tex_bits = get_bits_diff(s);
115
1238
}
116
117
/**
118
 * Builds all 4 optimal Huffman tables.
119
 *
120
 * Uses the data stored in the JPEG buffer to compute the tables.
121
 * Stores the Huffman tables in the bits_* and val_* arrays in the MJpegContext.
122
 *
123
 * @param m MJpegContext containing the JPEG buffer.
124
 */
125
1238
static void mjpeg_build_optimal_huffman(MJpegContext *m)
126
{
127
    MJpegEncHuffmanContext dc_luminance_ctx;
128
    MJpegEncHuffmanContext dc_chrominance_ctx;
129
    MJpegEncHuffmanContext ac_luminance_ctx;
130
    MJpegEncHuffmanContext ac_chrominance_ctx;
131
1238
    MJpegEncHuffmanContext *ctx[4] = { &dc_luminance_ctx,
132
                                       &dc_chrominance_ctx,
133
                                       &ac_luminance_ctx,
134
                                       &ac_chrominance_ctx };
135
6190
    for (int i = 0; i < 4; i++)
136
4952
        ff_mjpeg_encode_huffman_init(ctx[i]);
137
138
28812345
    for (int i = 0; i < m->huff_ncode; i++) {
139
28811107
        int table_id = m->huff_buffer[i].table_id;
140
28811107
        int code     = m->huff_buffer[i].code;
141
142
28811107
        ff_mjpeg_encode_huffman_increment(ctx[table_id], code);
143
    }
144
145
1238
    ff_mjpeg_encode_huffman_close(&dc_luminance_ctx,
146
1238
                                  m->bits_dc_luminance,
147
1238
                                  m->val_dc_luminance, 12);
148
1238
    ff_mjpeg_encode_huffman_close(&dc_chrominance_ctx,
149
1238
                                  m->bits_dc_chrominance,
150
1238
                                  m->val_dc_chrominance, 12);
151
1238
    ff_mjpeg_encode_huffman_close(&ac_luminance_ctx,
152
1238
                                  m->bits_ac_luminance,
153
1238
                                  m->val_ac_luminance, 256);
154
1238
    ff_mjpeg_encode_huffman_close(&ac_chrominance_ctx,
155
1238
                                  m->bits_ac_chrominance,
156
1238
                                  m->val_ac_chrominance, 256);
157
158
1238
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
159
1238
                                 m->huff_code_dc_luminance,
160
1238
                                 m->bits_dc_luminance,
161
1238
                                 m->val_dc_luminance);
162
1238
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
163
1238
                                 m->huff_code_dc_chrominance,
164
1238
                                 m->bits_dc_chrominance,
165
1238
                                 m->val_dc_chrominance);
166
1238
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
167
1238
                                 m->huff_code_ac_luminance,
168
1238
                                 m->bits_ac_luminance,
169
1238
                                 m->val_ac_luminance);
170
1238
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
171
1238
                                 m->huff_code_ac_chrominance,
172
1238
                                 m->bits_ac_chrominance,
173
1238
                                 m->val_ac_chrominance);
174
1238
}
175
#endif
176
177
/**
178
 * Writes the complete JPEG frame when optimal huffman tables are enabled,
179
 * otherwise writes the stuffing.
180
 *
181
 * Header + values + stuffing.
182
 *
183
 * @param s The MpegEncContext.
184
 * @return int Error code, 0 if successful.
185
 */
186
1438
int ff_mjpeg_encode_stuffing(MpegEncContext *s)
187
{
188
1438
    PutBitContext *pbc = &s->pb;
189
1438
    int mb_y = s->mb_y - !s->mb_x;
190
    int ret;
191
192
#if CONFIG_MJPEG_ENCODER
193
1438
    if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
194
1238
        MJpegContext *m = s->mjpeg_ctx;
195
196
1238
        mjpeg_build_optimal_huffman(m);
197
198
        // Replace the VLCs with the optimal ones.
199
        // The default ones may be used for trellis during quantization.
200
1238
        init_uni_ac_vlc(m->huff_size_ac_luminance,   m->uni_ac_vlc_len);
201
1238
        init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
202
1238
        s->intra_ac_vlc_length      =
203
1238
        s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
204
1238
        s->intra_chroma_ac_vlc_length      =
205
1238
        s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
206
207
1238
        ff_mjpeg_encode_picture_header(s->avctx, &s->pb, &s->intra_scantable,
208
1238
                                       s->pred, s->intra_matrix, s->chroma_intra_matrix);
209
1238
        mjpeg_encode_picture_frame(s);
210
    }
211
#endif
212
213
1438
    ret = ff_mpv_reallocate_putbitbuffer(s, put_bits_count(&s->pb) / 8 + 100,
214
1438
                                            put_bits_count(&s->pb) / 4 + 1000);
215
1438
    if (ret < 0) {
216
        av_log(s->avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");
217
        goto fail;
218
    }
219
220
1438
    ff_mjpeg_escape_FF(pbc, s->esc_pos);
221
222

1438
    if ((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height - 1)
223
        put_marker(pbc, RST0 + (mb_y&7));
224
1438
    s->esc_pos = put_bytes_count(pbc, 0);
225
226
1438
fail:
227
5752
    for (int i = 0; i < 3; i++)
228
4314
        s->last_dc[i] = 128 << s->intra_dc_precision;
229
230
1438
    return ret;
231
}
232
233
26
static int alloc_huffman(MpegEncContext *s)
234
{
235
26
    MJpegContext *m = s->mjpeg_ctx;
236
    size_t num_mbs, num_blocks, num_codes;
237
    int blocks_per_mb;
238
239
    // We need to init this here as the mjpeg init is called before the common init,
240
26
    s->mb_width  = (s->width  + 15) / 16;
241
26
    s->mb_height = (s->height + 15) / 16;
242
243

26
    switch (s->chroma_format) {
244
18
    case CHROMA_420: blocks_per_mb =  6; break;
245
4
    case CHROMA_422: blocks_per_mb =  8; break;
246
4
    case CHROMA_444: blocks_per_mb = 12; break;
247
    default: av_assert0(0);
248
    };
249
250
    // Make sure we have enough space to hold this frame.
251
26
    num_mbs = s->mb_width * s->mb_height;
252
26
    num_blocks = num_mbs * blocks_per_mb;
253
26
    num_codes = num_blocks * 64;
254
255
26
    m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
256
26
    if (!m->huff_buffer)
257
        return AVERROR(ENOMEM);
258
26
    return 0;
259
}
260
261
30
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
262
{
263
    MJpegContext *m;
264
    int ret;
265
266
30
    av_assert0(s->slice_context_count == 1);
267
268
    /* The following check is automatically true for AMV,
269
     * but it doesn't hurt either. */
270
30
    ret = ff_mjpeg_encode_check_pix_fmt(s->avctx);
271
30
    if (ret < 0)
272
        return ret;
273
274

30
    if (s->width > 65500 || s->height > 65500) {
275
        av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
276
        return AVERROR(EINVAL);
277
    }
278
279
30
    m = av_mallocz(sizeof(MJpegContext));
280
30
    if (!m)
281
        return AVERROR(ENOMEM);
282
283
30
    s->min_qcoeff=-1023;
284
30
    s->max_qcoeff= 1023;
285
286
    // Build default Huffman tables.
287
    // These may be overwritten later with more optimal Huffman tables, but
288
    // they are needed at least right now for some processes like trellis.
289
30
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
290
30
                                 m->huff_code_dc_luminance,
291
                                 avpriv_mjpeg_bits_dc_luminance,
292
                                 avpriv_mjpeg_val_dc);
293
30
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
294
30
                                 m->huff_code_dc_chrominance,
295
                                 avpriv_mjpeg_bits_dc_chrominance,
296
                                 avpriv_mjpeg_val_dc);
297
30
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
298
30
                                 m->huff_code_ac_luminance,
299
                                 avpriv_mjpeg_bits_ac_luminance,
300
                                 avpriv_mjpeg_val_ac_luminance);
301
30
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
302
30
                                 m->huff_code_ac_chrominance,
303
                                 avpriv_mjpeg_bits_ac_chrominance,
304
                                 avpriv_mjpeg_val_ac_chrominance);
305
306
30
    init_uni_ac_vlc(m->huff_size_ac_luminance,   m->uni_ac_vlc_len);
307
30
    init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
308
30
    s->intra_ac_vlc_length      =
309
30
    s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
310
30
    s->intra_chroma_ac_vlc_length      =
311
30
    s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
312
313
    // Buffers start out empty.
314
30
    m->huff_ncode = 0;
315
30
    s->mjpeg_ctx = m;
316
317
30
    if(s->huffman == HUFFMAN_TABLE_OPTIMAL)
318
26
        return alloc_huffman(s);
319
320
4
    return 0;
321
}
322
323
30
av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
324
{
325
30
    if (s->mjpeg_ctx) {
326
30
        av_freep(&s->mjpeg_ctx->huff_buffer);
327
30
        av_freep(&s->mjpeg_ctx);
328
    }
329
30
}
330
331
/**
332
 * Add code and table_id to the JPEG buffer.
333
 *
334
 * @param s The MJpegContext which contains the JPEG buffer.
335
 * @param table_id Which Huffman table the code belongs to.
336
 * @param code The encoded exponent of the coefficients and the run-bits.
337
 */
338
28811107
static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
339
{
340
28811107
    MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
341
28811107
    c->table_id = table_id;
342
28811107
    c->code = code;
343
28811107
}
344
345
/**
346
 * Add the coefficient's data to the JPEG buffer.
347
 *
348
 * @param s The MJpegContext which contains the JPEG buffer.
349
 * @param table_id Which Huffman table the code belongs to.
350
 * @param val The coefficient.
351
 * @param run The run-bits.
352
 */
353
26111467
static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
354
{
355
    int mant, code;
356
357
26111467
    if (val == 0) {
358
103825
        av_assert0(run == 0);
359
103825
        ff_mjpeg_encode_code(s, table_id, 0);
360
    } else {
361
26007642
        mant = val;
362
26007642
        if (val < 0) {
363
12984441
            val = -val;
364
12984441
            mant--;
365
        }
366
367
26007642
        code = (run << 4) | (av_log2_16bit(val) + 1);
368
369
26007642
        s->huff_buffer[s->huff_ncode].mant = mant;
370
26007642
        ff_mjpeg_encode_code(s, table_id, code);
371
    }
372
26111467
}
373
374
/**
375
 * Add the block's data into the JPEG buffer.
376
 *
377
 * @param s The MJpegEncContext that contains the JPEG buffer.
378
 * @param block The block.
379
 * @param n The block's index or number.
380
 */
381
2722788
static void record_block(MpegEncContext *s, int16_t *block, int n)
382
{
383
    int i, j, table_id;
384
    int component, dc, last_index, val, run;
385
2722788
    MJpegContext *m = s->mjpeg_ctx;
386
387
    /* DC coef */
388
2722788
    component = (n <= 3 ? 0 : (n&1) + 1);
389
2722788
    table_id = (n <= 3 ? 0 : 1);
390
2722788
    dc = block[0]; /* overflow is impossible */
391
2722788
    val = dc - s->last_dc[component];
392
393
2722788
    ff_mjpeg_encode_coef(m, table_id, val, 0);
394
395
2722788
    s->last_dc[component] = dc;
396
397
    /* AC coefs */
398
399
2722788
    run = 0;
400
2722788
    last_index = s->block_last_index[n];
401
2722788
    table_id |= 2;
402
403
52748192
    for(i=1;i<=last_index;i++) {
404
50025404
        j = s->intra_scantable.permutated[i];
405
50025404
        val = block[j];
406
407
50025404
        if (val == 0) {
408
26636725
            run++;
409
        } else {
410
23445317
            while (run >= 16) {
411
56638
                ff_mjpeg_encode_code(m, table_id, 0xf0);
412
56638
                run -= 16;
413
            }
414
23388679
            ff_mjpeg_encode_coef(m, table_id, val, run);
415
23388679
            run = 0;
416
        }
417
    }
418
419
    /* output EOB only if not already 64 values */
420

2722788
    if (last_index < 63 || run != 0)
421
2643002
        ff_mjpeg_encode_code(m, table_id, 0);
422
2722788
}
423
424
359100
static void encode_block(MpegEncContext *s, int16_t *block, int n)
425
{
426
    int mant, nbits, code, i, j;
427
    int component, dc, run, last_index, val;
428
359100
    MJpegContext *m = s->mjpeg_ctx;
429
    uint8_t *huff_size_ac;
430
    uint16_t *huff_code_ac;
431
432
    /* DC coef */
433
359100
    component = (n <= 3 ? 0 : (n&1) + 1);
434
359100
    dc = block[0]; /* overflow is impossible */
435
359100
    val = dc - s->last_dc[component];
436
359100
    if (n < 4) {
437
239400
        ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
438
239400
        huff_size_ac = m->huff_size_ac_luminance;
439
239400
        huff_code_ac = m->huff_code_ac_luminance;
440
    } else {
441
119700
        ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
442
119700
        huff_size_ac = m->huff_size_ac_chrominance;
443
119700
        huff_code_ac = m->huff_code_ac_chrominance;
444
    }
445
359100
    s->last_dc[component] = dc;
446
447
    /* AC coefs */
448
449
359100
    run = 0;
450
359100
    last_index = s->block_last_index[n];
451
6879268
    for(i=1;i<=last_index;i++) {
452
6520168
        j = s->intra_scantable.permutated[i];
453
6520168
        val = block[j];
454
6520168
        if (val == 0) {
455
3000879
            run++;
456
        } else {
457
3522307
            while (run >= 16) {
458
3018
                put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
459
3018
                run -= 16;
460
            }
461
3519289
            mant = val;
462
3519289
            if (val < 0) {
463
1776140
                val = -val;
464
1776140
                mant--;
465
            }
466
467
3519289
            nbits= av_log2_16bit(val) + 1;
468
3519289
            code = (run << 4) | nbits;
469
470
3519289
            put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
471
472
3519289
            put_sbits(&s->pb, nbits, mant);
473
3519289
            run = 0;
474
        }
475
    }
476
477
    /* output EOB only if not already 64 values */
478

359100
    if (last_index < 63 || run != 0)
479
344417
        put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
480
359100
}
481
482
433998
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
483
{
484
    int i;
485
433998
    if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
486
374148
        if (s->chroma_format == CHROMA_444) {
487
59850
            record_block(s, block[0], 0);
488
59850
            record_block(s, block[2], 2);
489
59850
            record_block(s, block[4], 4);
490
59850
            record_block(s, block[8], 8);
491
59850
            record_block(s, block[5], 5);
492
59850
            record_block(s, block[9], 9);
493
494
59850
            if (16*s->mb_x+8 < s->width) {
495
59700
                record_block(s, block[1], 1);
496
59700
                record_block(s, block[3], 3);
497
59700
                record_block(s, block[6], 6);
498
59700
                record_block(s, block[10], 10);
499
59700
                record_block(s, block[7], 7);
500
59700
                record_block(s, block[11], 11);
501
            }
502
        } else {
503
1885788
            for(i=0;i<5;i++) {
504
1571490
                record_block(s, block[i], i);
505
            }
506
314298
            if (s->chroma_format == CHROMA_420) {
507
254448
                record_block(s, block[5], 5);
508
            } else {
509
59850
                record_block(s, block[6], 6);
510
59850
                record_block(s, block[5], 5);
511
59850
                record_block(s, block[7], 7);
512
            }
513
        }
514
    } else {
515
59850
        if (s->chroma_format == CHROMA_444) {
516
            encode_block(s, block[0], 0);
517
            encode_block(s, block[2], 2);
518
            encode_block(s, block[4], 4);
519
            encode_block(s, block[8], 8);
520
            encode_block(s, block[5], 5);
521
            encode_block(s, block[9], 9);
522
523
            if (16*s->mb_x+8 < s->width) {
524
                encode_block(s, block[1], 1);
525
                encode_block(s, block[3], 3);
526
                encode_block(s, block[6], 6);
527
                encode_block(s, block[10], 10);
528
                encode_block(s, block[7], 7);
529
                encode_block(s, block[11], 11);
530
            }
531
        } else {
532
359100
            for(i=0;i<5;i++) {
533
299250
                encode_block(s, block[i], i);
534
            }
535
59850
            if (s->chroma_format == CHROMA_420) {
536
59850
                encode_block(s, block[5], 5);
537
            } else {
538
                encode_block(s, block[6], 6);
539
                encode_block(s, block[5], 5);
540
                encode_block(s, block[7], 7);
541
            }
542
        }
543
544
59850
        s->i_tex_bits += get_bits_diff(s);
545
    }
546
433998
}
547
548
#if CONFIG_AMV_ENCODER
549
// maximum over s->mjpeg_vsample[i]
550
#define V_MAX 2
551
200
static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
552
                              const AVFrame *pic_arg, int *got_packet)
553
{
554
200
    MpegEncContext *s = avctx->priv_data;
555
    AVFrame *pic;
556
    int i, ret;
557
    int chroma_h_shift, chroma_v_shift;
558
559
200
    av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
560
561

200
    if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
562
        av_log(avctx, AV_LOG_ERROR,
563
               "Heights which are not a multiple of 16 might fail with some decoders, "
564
               "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
565
        av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
566
               "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
567
        return AVERROR_EXPERIMENTAL;
568
    }
569
570
200
    pic = av_frame_clone(pic_arg);
571
200
    if (!pic)
572
        return AVERROR(ENOMEM);
573
    //picture should be flipped upside-down
574
800
    for(i=0; i < 3; i++) {
575
600
        int vsample = i ? 2 >> chroma_v_shift : 2;
576
600
        pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
577
600
        pic->linesize[i] *= -1;
578
    }
579
200
    ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
580
200
    av_frame_free(&pic);
581
200
    return ret;
582
}
583
#endif
584
585
#define OFFSET(x) offsetof(MpegEncContext, x)
586
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
587
static const AVOption options[] = {
588
FF_MPV_COMMON_OPTS
589
{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
590
    { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
591
    { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
592
    { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
593
{ "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
594
    { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
595
    { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
596
{ "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 },
597
#if FF_API_MPEGVIDEO_OPTS
598
FF_MPV_DEPRECATED_MPEG_QUANT_OPT
599
FF_MPV_DEPRECATED_A53_CC_OPT
600
FF_MPV_DEPRECATED_BFRAME_OPTS
601
#endif
602
{ NULL},
603
};
604
605
#if CONFIG_MJPEG_ENCODER
606
static const AVClass mjpeg_class = {
607
    .class_name = "mjpeg encoder",
608
    .item_name  = av_default_item_name,
609
    .option     = options,
610
    .version    = LIBAVUTIL_VERSION_INT,
611
};
612
613
AVCodec ff_mjpeg_encoder = {
614
    .name           = "mjpeg",
615
    .long_name      = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
616
    .type           = AVMEDIA_TYPE_VIDEO,
617
    .id             = AV_CODEC_ID_MJPEG,
618
    .priv_data_size = sizeof(MpegEncContext),
619
    .init           = ff_mpv_encode_init,
620
    .encode2        = ff_mpv_encode_picture,
621
    .close          = ff_mpv_encode_end,
622
    .capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS,
623
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
624
    .pix_fmts       = (const enum AVPixelFormat[]) {
625
        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
626
        AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
627
        AV_PIX_FMT_NONE
628
    },
629
    .priv_class     = &mjpeg_class,
630
    .profiles       = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
631
};
632
#endif
633
634
#if CONFIG_AMV_ENCODER
635
static const AVClass amv_class = {
636
    .class_name = "amv encoder",
637
    .item_name  = av_default_item_name,
638
    .option     = options,
639
    .version    = LIBAVUTIL_VERSION_INT,
640
};
641
642
AVCodec ff_amv_encoder = {
643
    .name           = "amv",
644
    .long_name      = NULL_IF_CONFIG_SMALL("AMV Video"),
645
    .type           = AVMEDIA_TYPE_VIDEO,
646
    .id             = AV_CODEC_ID_AMV,
647
    .priv_data_size = sizeof(MpegEncContext),
648
    .init           = ff_mpv_encode_init,
649
    .encode2        = amv_encode_picture,
650
    .close          = ff_mpv_encode_end,
651
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
652
    .pix_fmts       = (const enum AVPixelFormat[]) {
653
        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
654
    },
655
    .priv_class     = &amv_class,
656
};
657
#endif