GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mjpegenc.c Lines: 163 188 86.7 %
Date: 2019-11-18 18:00:01 Branches: 63 78 80.8 %

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 "mpegvideo.h"
39
#include "mjpeg.h"
40
#include "mjpegenc.h"
41
#include "profiles.h"
42
43
26
static int alloc_huffman(MpegEncContext *s)
44
{
45
26
    MJpegContext *m = s->mjpeg_ctx;
46
    size_t num_mbs, num_blocks, num_codes;
47
    int blocks_per_mb;
48
49
    // We need to init this here as the mjpeg init is called before the common init,
50
26
    s->mb_width  = (s->width  + 15) / 16;
51
26
    s->mb_height = (s->height + 15) / 16;
52
53

26
    switch (s->chroma_format) {
54
18
    case CHROMA_420: blocks_per_mb =  6; break;
55
4
    case CHROMA_422: blocks_per_mb =  8; break;
56
4
    case CHROMA_444: blocks_per_mb = 12; break;
57
    default: av_assert0(0);
58
    };
59
60
    // Make sure we have enough space to hold this frame.
61
26
    num_mbs = s->mb_width * s->mb_height;
62
26
    num_blocks = num_mbs * blocks_per_mb;
63
26
    num_codes = num_blocks * 64;
64
65
26
    m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
66
26
    if (!m->huff_buffer)
67
        return AVERROR(ENOMEM);
68
26
    return 0;
69
}
70
71
30
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
72
{
73
    MJpegContext *m;
74
75
30
    av_assert0(s->slice_context_count == 1);
76
77

30
    if (s->width > 65500 || s->height > 65500) {
78
        av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
79
        return AVERROR(EINVAL);
80
    }
81
82
30
    m = av_mallocz(sizeof(MJpegContext));
83
30
    if (!m)
84
        return AVERROR(ENOMEM);
85
86
30
    s->min_qcoeff=-1023;
87
30
    s->max_qcoeff= 1023;
88
89
    // Build default Huffman tables.
90
    // These may be overwritten later with more optimal Huffman tables, but
91
    // they are needed at least right now for some processes like trellis.
92
30
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
93
30
                                 m->huff_code_dc_luminance,
94
                                 avpriv_mjpeg_bits_dc_luminance,
95
                                 avpriv_mjpeg_val_dc);
96
30
    ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
97
30
                                 m->huff_code_dc_chrominance,
98
                                 avpriv_mjpeg_bits_dc_chrominance,
99
                                 avpriv_mjpeg_val_dc);
100
30
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
101
30
                                 m->huff_code_ac_luminance,
102
                                 avpriv_mjpeg_bits_ac_luminance,
103
                                 avpriv_mjpeg_val_ac_luminance);
104
30
    ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
105
30
                                 m->huff_code_ac_chrominance,
106
                                 avpriv_mjpeg_bits_ac_chrominance,
107
                                 avpriv_mjpeg_val_ac_chrominance);
108
109
30
    ff_init_uni_ac_vlc(m->huff_size_ac_luminance,   m->uni_ac_vlc_len);
110
30
    ff_init_uni_ac_vlc(m->huff_size_ac_chrominance, m->uni_chroma_ac_vlc_len);
111
30
    s->intra_ac_vlc_length      =
112
30
    s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
113
30
    s->intra_chroma_ac_vlc_length      =
114
30
    s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
115
116
    // Buffers start out empty.
117
30
    m->huff_ncode = 0;
118
30
    s->mjpeg_ctx = m;
119
120
30
    if(s->huffman == HUFFMAN_TABLE_OPTIMAL)
121
26
        return alloc_huffman(s);
122
123
4
    return 0;
124
}
125
126
30
av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
127
{
128
30
    av_freep(&s->mjpeg_ctx->huff_buffer);
129
30
    av_freep(&s->mjpeg_ctx);
130
30
}
131
132
/**
133
 * Add code and table_id to the JPEG buffer.
134
 *
135
 * @param s The MJpegContext which contains the JPEG buffer.
136
 * @param table_id Which Huffman table the code belongs to.
137
 * @param code The encoded exponent of the coefficients and the run-bits.
138
 */
139
28811107
static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
140
{
141
28811107
    MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
142
28811107
    c->table_id = table_id;
143
28811107
    c->code = code;
144
28811107
}
145
146
/**
147
 * Add the coefficient's data to the JPEG buffer.
148
 *
149
 * @param s The MJpegContext which contains the JPEG buffer.
150
 * @param table_id Which Huffman table the code belongs to.
151
 * @param val The coefficient.
152
 * @param run The run-bits.
153
 */
154
26111467
static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
155
{
156
    int mant, code;
157
158
26111467
    if (val == 0) {
159
103825
        av_assert0(run == 0);
160
103825
        ff_mjpeg_encode_code(s, table_id, 0);
161
    } else {
162
26007642
        mant = val;
163
26007642
        if (val < 0) {
164
12984441
            val = -val;
165
12984441
            mant--;
166
        }
167
168
26007642
        code = (run << 4) | (av_log2_16bit(val) + 1);
169
170
26007642
        s->huff_buffer[s->huff_ncode].mant = mant;
171
26007642
        ff_mjpeg_encode_code(s, table_id, code);
172
    }
173
26111467
}
174
175
/**
176
 * Add the block's data into the JPEG buffer.
177
 *
178
 * @param s The MJpegEncContext that contains the JPEG buffer.
179
 * @param block The block.
180
 * @param n The block's index or number.
181
 */
182
2722788
static void record_block(MpegEncContext *s, int16_t *block, int n)
183
{
184
    int i, j, table_id;
185
    int component, dc, last_index, val, run;
186
2722788
    MJpegContext *m = s->mjpeg_ctx;
187
188
    /* DC coef */
189
2722788
    component = (n <= 3 ? 0 : (n&1) + 1);
190
2722788
    table_id = (n <= 3 ? 0 : 1);
191
2722788
    dc = block[0]; /* overflow is impossible */
192
2722788
    val = dc - s->last_dc[component];
193
194
2722788
    ff_mjpeg_encode_coef(m, table_id, val, 0);
195
196
2722788
    s->last_dc[component] = dc;
197
198
    /* AC coefs */
199
200
2722788
    run = 0;
201
2722788
    last_index = s->block_last_index[n];
202
2722788
    table_id |= 2;
203
204
52748192
    for(i=1;i<=last_index;i++) {
205
50025404
        j = s->intra_scantable.permutated[i];
206
50025404
        val = block[j];
207
208
50025404
        if (val == 0) {
209
26636725
            run++;
210
        } else {
211
23445317
            while (run >= 16) {
212
56638
                ff_mjpeg_encode_code(m, table_id, 0xf0);
213
56638
                run -= 16;
214
            }
215
23388679
            ff_mjpeg_encode_coef(m, table_id, val, run);
216
23388679
            run = 0;
217
        }
218
    }
219
220
    /* output EOB only if not already 64 values */
221

2722788
    if (last_index < 63 || run != 0)
222
2643002
        ff_mjpeg_encode_code(m, table_id, 0);
223
2722788
}
224
225
359100
static void encode_block(MpegEncContext *s, int16_t *block, int n)
226
{
227
    int mant, nbits, code, i, j;
228
    int component, dc, run, last_index, val;
229
359100
    MJpegContext *m = s->mjpeg_ctx;
230
    uint8_t *huff_size_ac;
231
    uint16_t *huff_code_ac;
232
233
    /* DC coef */
234
359100
    component = (n <= 3 ? 0 : (n&1) + 1);
235
359100
    dc = block[0]; /* overflow is impossible */
236
359100
    val = dc - s->last_dc[component];
237
359100
    if (n < 4) {
238
239400
        ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
239
239400
        huff_size_ac = m->huff_size_ac_luminance;
240
239400
        huff_code_ac = m->huff_code_ac_luminance;
241
    } else {
242
119700
        ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
243
119700
        huff_size_ac = m->huff_size_ac_chrominance;
244
119700
        huff_code_ac = m->huff_code_ac_chrominance;
245
    }
246
359100
    s->last_dc[component] = dc;
247
248
    /* AC coefs */
249
250
359100
    run = 0;
251
359100
    last_index = s->block_last_index[n];
252
6879268
    for(i=1;i<=last_index;i++) {
253
6520168
        j = s->intra_scantable.permutated[i];
254
6520168
        val = block[j];
255
6520168
        if (val == 0) {
256
3000879
            run++;
257
        } else {
258
3522307
            while (run >= 16) {
259
3018
                put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
260
3018
                run -= 16;
261
            }
262
3519289
            mant = val;
263
3519289
            if (val < 0) {
264
1776140
                val = -val;
265
1776140
                mant--;
266
            }
267
268
3519289
            nbits= av_log2_16bit(val) + 1;
269
3519289
            code = (run << 4) | nbits;
270
271
3519289
            put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
272
273
3519289
            put_sbits(&s->pb, nbits, mant);
274
3519289
            run = 0;
275
        }
276
    }
277
278
    /* output EOB only if not already 64 values */
279

359100
    if (last_index < 63 || run != 0)
280
344417
        put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
281
359100
}
282
283
433998
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
284
{
285
    int i;
286
433998
    if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
287
374148
        if (s->chroma_format == CHROMA_444) {
288
59850
            record_block(s, block[0], 0);
289
59850
            record_block(s, block[2], 2);
290
59850
            record_block(s, block[4], 4);
291
59850
            record_block(s, block[8], 8);
292
59850
            record_block(s, block[5], 5);
293
59850
            record_block(s, block[9], 9);
294
295
59850
            if (16*s->mb_x+8 < s->width) {
296
59700
                record_block(s, block[1], 1);
297
59700
                record_block(s, block[3], 3);
298
59700
                record_block(s, block[6], 6);
299
59700
                record_block(s, block[10], 10);
300
59700
                record_block(s, block[7], 7);
301
59700
                record_block(s, block[11], 11);
302
            }
303
        } else {
304
1885788
            for(i=0;i<5;i++) {
305
1571490
                record_block(s, block[i], i);
306
            }
307
314298
            if (s->chroma_format == CHROMA_420) {
308
254448
                record_block(s, block[5], 5);
309
            } else {
310
59850
                record_block(s, block[6], 6);
311
59850
                record_block(s, block[5], 5);
312
59850
                record_block(s, block[7], 7);
313
            }
314
        }
315
    } else {
316
59850
        if (s->chroma_format == CHROMA_444) {
317
            encode_block(s, block[0], 0);
318
            encode_block(s, block[2], 2);
319
            encode_block(s, block[4], 4);
320
            encode_block(s, block[8], 8);
321
            encode_block(s, block[5], 5);
322
            encode_block(s, block[9], 9);
323
324
            if (16*s->mb_x+8 < s->width) {
325
                encode_block(s, block[1], 1);
326
                encode_block(s, block[3], 3);
327
                encode_block(s, block[6], 6);
328
                encode_block(s, block[10], 10);
329
                encode_block(s, block[7], 7);
330
                encode_block(s, block[11], 11);
331
            }
332
        } else {
333
359100
            for(i=0;i<5;i++) {
334
299250
                encode_block(s, block[i], i);
335
            }
336
59850
            if (s->chroma_format == CHROMA_420) {
337
59850
                encode_block(s, block[5], 5);
338
            } else {
339
                encode_block(s, block[6], 6);
340
                encode_block(s, block[5], 5);
341
                encode_block(s, block[7], 7);
342
            }
343
        }
344
345
59850
        s->i_tex_bits += get_bits_diff(s);
346
    }
347
433998
}
348
349
#if CONFIG_AMV_ENCODER
350
// maximum over s->mjpeg_vsample[i]
351
#define V_MAX 2
352
200
static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
353
                              const AVFrame *pic_arg, int *got_packet)
354
{
355
200
    MpegEncContext *s = avctx->priv_data;
356
    AVFrame *pic;
357
    int i, ret;
358
    int chroma_h_shift, chroma_v_shift;
359
360
200
    av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
361
362

200
    if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
363
        av_log(avctx, AV_LOG_ERROR,
364
               "Heights which are not a multiple of 16 might fail with some decoders, "
365
               "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
366
        av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
367
               "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
368
        return AVERROR_EXPERIMENTAL;
369
    }
370
371
200
    pic = av_frame_clone(pic_arg);
372
200
    if (!pic)
373
        return AVERROR(ENOMEM);
374
    //picture should be flipped upside-down
375
800
    for(i=0; i < 3; i++) {
376
600
        int vsample = i ? 2 >> chroma_v_shift : 2;
377
600
        pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
378
600
        pic->linesize[i] *= -1;
379
    }
380
200
    ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
381
200
    av_frame_free(&pic);
382
200
    return ret;
383
}
384
#endif
385
386
#define OFFSET(x) offsetof(MpegEncContext, x)
387
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
388
static const AVOption options[] = {
389
FF_MPV_COMMON_OPTS
390
{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
391
    { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
392
    { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
393
    { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
394
{ "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
395
    { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
396
    { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
397
{ NULL},
398
};
399
400
#if CONFIG_MJPEG_ENCODER
401
static const AVClass mjpeg_class = {
402
    .class_name = "mjpeg encoder",
403
    .item_name  = av_default_item_name,
404
    .option     = options,
405
    .version    = LIBAVUTIL_VERSION_INT,
406
};
407
408
AVCodec ff_mjpeg_encoder = {
409
    .name           = "mjpeg",
410
    .long_name      = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
411
    .type           = AVMEDIA_TYPE_VIDEO,
412
    .id             = AV_CODEC_ID_MJPEG,
413
    .priv_data_size = sizeof(MpegEncContext),
414
    .init           = ff_mpv_encode_init,
415
    .encode2        = ff_mpv_encode_picture,
416
    .close          = ff_mpv_encode_end,
417
    .capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY,
418
    .pix_fmts       = (const enum AVPixelFormat[]) {
419
        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
420
    },
421
    .priv_class     = &mjpeg_class,
422
    .profiles       = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
423
};
424
#endif
425
426
#if CONFIG_AMV_ENCODER
427
static const AVClass amv_class = {
428
    .class_name = "amv encoder",
429
    .item_name  = av_default_item_name,
430
    .option     = options,
431
    .version    = LIBAVUTIL_VERSION_INT,
432
};
433
434
AVCodec ff_amv_encoder = {
435
    .name           = "amv",
436
    .long_name      = NULL_IF_CONFIG_SMALL("AMV Video"),
437
    .type           = AVMEDIA_TYPE_VIDEO,
438
    .id             = AV_CODEC_ID_AMV,
439
    .priv_data_size = sizeof(MpegEncContext),
440
    .init           = ff_mpv_encode_init,
441
    .encode2        = amv_encode_picture,
442
    .close          = ff_mpv_encode_end,
443
    .pix_fmts       = (const enum AVPixelFormat[]) {
444
        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
445
    },
446
    .priv_class     = &amv_class,
447
};
448
#endif