GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ffv1dec.c Lines: 376 665 56.5 %
Date: 2020-09-21 17:35:45 Branches: 238 543 43.8 %

Line Branch Exec Source
1
/*
2
 * FFV1 decoder
3
 *
4
 * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
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
/**
24
 * @file
25
 * FF Video Codec 1 (a lossless codec) decoder
26
 */
27
28
#include "libavutil/avassert.h"
29
#include "libavutil/crc.h"
30
#include "libavutil/opt.h"
31
#include "libavutil/imgutils.h"
32
#include "libavutil/pixdesc.h"
33
#include "avcodec.h"
34
#include "internal.h"
35
#include "get_bits.h"
36
#include "rangecoder.h"
37
#include "golomb.h"
38
#include "mathops.h"
39
#include "ffv1.h"
40
41
124612637
static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
42
                                               int is_signed)
43
{
44
124612637
    if (get_rac(c, state + 0))
45
52657552
        return 0;
46
    else {
47
        int i, e;
48
        unsigned a;
49
71955085
        e = 0;
50

577788167
        while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
51
505833082
            e++;
52
505833082
            if (e > 31)
53
                return AVERROR_INVALIDDATA;
54
        }
55
56
71955085
        a = 1;
57
577788167
        for (i = e - 1; i >= 0; i--)
58
505833082
            a += a + get_rac(c, state + 22 + FFMIN(i, 9));  // 22..31
59
60

71955085
        e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
61
71955085
        return (a ^ e) - e;
62
    }
63
}
64
65
53297
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
66
{
67
53297
    return get_symbol_inline(c, state, is_signed);
68
}
69
70
113342102
static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
71
                                 int bits)
72
{
73
    int k, i, v, ret;
74
75
113342102
    i = state->count;
76
113342102
    k = 0;
77
301739552
    while (i < state->error_sum) { // FIXME: optimize
78
188397450
        k++;
79
188397450
        i += i;
80
    }
81
82
113342102
    v = get_sr_golomb(gb, k, 12, bits);
83
    ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
84
            v, state->bias, state->error_sum, state->drift, state->count, k);
85
86
113342102
    v ^= ((2 * state->drift + state->count) >> 31);
87
88
113342102
    ret = fold(v + state->bias, bits);
89
90
113342102
    update_vlc_state(state, v);
91
92
113342102
    return ret;
93
}
94
95
3117384
static int is_input_end(FFV1Context *s)
96
{
97
3117384
    if (s->ac != AC_GOLOMB_RICE) {
98
1648728
        RangeCoder *const c = &s->c;
99
1648728
        if (c->overread > MAX_OVERREAD)
100
            return AVERROR_INVALIDDATA;
101
    } else {
102
1468656
        if (get_bits_left(&s->gb) < 1)
103
            return AVERROR_INVALIDDATA;
104
    }
105
3117384
    return 0;
106
}
107
108
#define TYPE int16_t
109
#define RENAME(name) name
110
#include "ffv1dec_template.c"
111
#undef TYPE
112
#undef RENAME
113
114
#define TYPE int32_t
115
#define RENAME(name) name ## 32
116
#include "ffv1dec_template.c"
117
118
10416
static int decode_plane(FFV1Context *s, uint8_t *src,
119
                         int w, int h, int stride, int plane_index,
120
                         int pixel_stride)
121
{
122
    int x, y;
123
    int16_t *sample[2];
124
10416
    sample[0] = s->sample_buffer + 3;
125
10416
    sample[1] = s->sample_buffer + w + 6 + 3;
126
127
10416
    s->run_index = 0;
128
129
10416
    memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
130
131
1019532
    for (y = 0; y < h; y++) {
132
1009116
        int16_t *temp = sample[0]; // FIXME: try a normal buffer
133
134
1009116
        sample[0] = sample[1];
135
1009116
        sample[1] = temp;
136
137
1009116
        sample[1][-1] = sample[0][0];
138
1009116
        sample[0][w]  = sample[0][w - 1];
139
140
1009116
        if (s->avctx->bits_per_raw_sample <= 8) {
141
459540
            int ret = decode_line(s, w, sample, plane_index, 8);
142
459540
            if (ret < 0)
143
                return ret;
144
70681422
            for (x = 0; x < w; x++)
145
70221882
                src[x*pixel_stride + stride * y] = sample[1][x];
146
        } else {
147
549576
            int ret = decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
148
549576
            if (ret < 0)
149
                return ret;
150
549576
            if (s->packed_at_lsb) {
151
78400464
                for (x = 0; x < w; x++) {
152
77850888
                    ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
153
                }
154
            } else {
155
                for (x = 0; x < w; x++) {
156
                    ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);
157
                }
158
            }
159
        }
160
    }
161
10416
    return 0;
162
}
163
164
4900
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
165
{
166
4900
    RangeCoder *c = &fs->c;
167
    uint8_t state[CONTEXT_SIZE];
168
    unsigned ps, i, context_count;
169
4900
    memset(state, 128, sizeof(state));
170
171
4900
    av_assert0(f->version > 2);
172
173
4900
    fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
174
4900
    fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
175
4900
    fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
176
4900
    fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
177
178
4900
    fs->slice_x /= f->num_h_slices;
179
4900
    fs->slice_y /= f->num_v_slices;
180
4900
    fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;
181
4900
    fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
182

4900
    if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
183
        return -1;
184
4900
    if (    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
185
4900
         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
186
        return -1;
187
188
14700
    for (i = 0; i < f->plane_count; i++) {
189
9800
        PlaneContext * const p = &fs->plane[i];
190
9800
        int idx = get_symbol(c, state, 0);
191
9800
        if (idx >= (unsigned)f->quant_table_count) {
192
            av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
193
            return -1;
194
        }
195
9800
        p->quant_table_index = idx;
196
9800
        memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
197
9800
        context_count = f->context_count[idx];
198
199
9800
        if (p->context_count < context_count) {
200
392
            av_freep(&p->state);
201
392
            av_freep(&p->vlc_state);
202
        }
203
9800
        p->context_count = context_count;
204
    }
205
206
4900
    ps = get_symbol(c, state, 0);
207
4900
    if (ps == 1) {
208
        f->cur->interlaced_frame = 1;
209
        f->cur->top_field_first  = 1;
210
4900
    } else if (ps == 2) {
211
        f->cur->interlaced_frame = 1;
212
        f->cur->top_field_first  = 0;
213
4900
    } else if (ps == 3) {
214
4900
        f->cur->interlaced_frame = 0;
215
    }
216
4900
    f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
217
4900
    f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
218
219
4900
    if (av_image_check_sar(f->width, f->height,
220
4900
                           f->cur->sample_aspect_ratio) < 0) {
221
        av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
222
               f->cur->sample_aspect_ratio.num,
223
               f->cur->sample_aspect_ratio.den);
224
        f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
225
    }
226
227
4900
    if (fs->version > 3) {
228
        fs->slice_reset_contexts = get_rac(c, state);
229
        fs->slice_coding_mode = get_symbol(c, state, 0);
230
        if (fs->slice_coding_mode != 1) {
231
            fs->slice_rct_by_coef = get_symbol(c, state, 0);
232
            fs->slice_rct_ry_coef = get_symbol(c, state, 0);
233
            if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
234
                av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
235
                return AVERROR_INVALIDDATA;
236
            }
237
        }
238
    }
239
240
4900
    return 0;
241
}
242
243
5104
static int decode_slice(AVCodecContext *c, void *arg)
244
{
245
5104
    FFV1Context *fs   = *(void **)arg;
246
5104
    FFV1Context *f    = fs->avctx->priv_data;
247
    int width, height, x, y, ret;
248
5104
    const int ps      = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
249
5104
    AVFrame * const p = f->cur;
250
    int i, si;
251
252
12454
    for( si=0; fs != f->slice_context[si]; si ++)
253
        ;
254
255

5104
    if(f->fsrc && !p->key_frame)
256
        ff_thread_await_progress(&f->last_picture, si, 0);
257
258

5104
    if(f->fsrc && !p->key_frame) {
259
        FFV1Context *fssrc = f->fsrc->slice_context[si];
260
        FFV1Context *fsdst = f->slice_context[si];
261
        av_assert1(fsdst->plane_count == fssrc->plane_count);
262
        av_assert1(fsdst == fs);
263
264
        if (!p->key_frame)
265
            fsdst->slice_damaged |= fssrc->slice_damaged;
266
267
        for (i = 0; i < f->plane_count; i++) {
268
            PlaneContext *psrc = &fssrc->plane[i];
269
            PlaneContext *pdst = &fsdst->plane[i];
270
271
            av_free(pdst->state);
272
            av_free(pdst->vlc_state);
273
            memcpy(pdst, psrc, sizeof(*pdst));
274
            pdst->state = NULL;
275
            pdst->vlc_state = NULL;
276
277
            if (fssrc->ac) {
278
                pdst->state = av_malloc_array(CONTEXT_SIZE,  psrc->context_count);
279
                memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
280
            } else {
281
                pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
282
                memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
283
            }
284
        }
285
    }
286
287
5104
    fs->slice_rct_by_coef = 1;
288
5104
    fs->slice_rct_ry_coef = 1;
289
290
5104
    if (f->version > 2) {
291
4900
        if (ff_ffv1_init_slice_state(f, fs) < 0)
292
            return AVERROR(ENOMEM);
293
4900
        if (decode_slice_header(f, fs) < 0) {
294
            fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
295
            fs->slice_damaged = 1;
296
            return AVERROR_INVALIDDATA;
297
        }
298
    }
299
5104
    if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
300
        return ret;
301

5104
    if (f->cur->key_frame || fs->slice_reset_contexts)
302
604
        ff_ffv1_clear_slice_state(f, fs);
303
304
5104
    width  = fs->slice_width;
305
5104
    height = fs->slice_height;
306
5104
    x      = fs->slice_x;
307
5104
    y      = fs->slice_y;
308
309
5104
    if (fs->ac == AC_GOLOMB_RICE) {
310

2656
        if (f->version == 3 && f->micro_version > 1 || f->version > 3)
311
2452
            get_rac(&fs->c, (uint8_t[]) { 129 });
312

2656
        fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
313
2656
        init_get_bits(&fs->gb,
314
2656
                      fs->c.bytestream_start + fs->ac_byte_count,
315
2656
                      (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
316
    }
317
318
    av_assert1(width && height);
319

8576
    if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {
320
3472
        const int chroma_width  = AV_CEIL_RSHIFT(width,  f->chroma_h_shift);
321
3472
        const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
322
3472
        const int cx            = x >> f->chroma_h_shift;
323
3472
        const int cy            = y >> f->chroma_v_shift;
324
3472
        decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
325
326
3472
        if (f->chroma_planes) {
327
3472
            decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
328
3472
            decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
329
        }
330
3472
        if (fs->transparency)
331
            decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1);
332
1632
    } else if (f->colorspace == 0) {
333
         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0]    , width, height, p->linesize[0], 0, 2);
334
         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
335
1632
    } else if (f->use32bit) {
336
816
        uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
337
816
                               p->data[1] + ps * x + y * p->linesize[1],
338
816
                               p->data[2] + ps * x + y * p->linesize[2],
339
816
                               p->data[3] + ps * x + y * p->linesize[3] };
340
816
        decode_rgb_frame32(fs, planes, width, height, p->linesize);
341
    } else {
342
816
        uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
343
816
                               p->data[1] + ps * x + y * p->linesize[1],
344
816
                               p->data[2] + ps * x + y * p->linesize[2],
345
816
                               p->data[3] + ps * x + y * p->linesize[3] };
346
816
        decode_rgb_frame(fs, planes, width, height, p->linesize);
347
    }
348

5104
    if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
349
        int v;
350
2448
        get_rac(&fs->c, (uint8_t[]) { 129 });
351
2448
        v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
352
2448
        if (v) {
353
            av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
354
            fs->slice_damaged = 1;
355
        }
356
    }
357
358
5104
    emms_c();
359
360
5104
    ff_thread_report_progress(&f->picture, si, 0);
361
362
5104
    return 0;
363
}
364
365
610
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
366
{
367
    int v;
368
610
    int i = 0;
369
    uint8_t state[CONTEXT_SIZE];
370
371
610
    memset(state, 128, sizeof(state));
372
373
2979
    for (v = 0; i < 128; v++) {
374
2369
        unsigned len = get_symbol(c, state, 0) + 1U;
375
376

2369
        if (len > 128 - i || !len)
377
            return AVERROR_INVALIDDATA;
378
379
80449
        while (len--) {
380
78080
            quant_table[i] = scale * v;
381
78080
            i++;
382
        }
383
    }
384
385
78080
    for (i = 1; i < 128; i++)
386
77470
        quant_table[256 - i] = -quant_table[i];
387
610
    quant_table[128] = -quant_table[127];
388
389
610
    return 2 * v - 1;
390
}
391
392
122
static int read_quant_tables(RangeCoder *c,
393
                             int16_t quant_table[MAX_CONTEXT_INPUTS][256])
394
{
395
    int i;
396
122
    int context_count = 1;
397
398
732
    for (i = 0; i < 5; i++) {
399
610
        int ret = read_quant_table(c, quant_table[i], context_count);
400
610
        if (ret < 0)
401
            return ret;
402
610
        context_count *= ret;
403
610
        if (context_count > 32768U) {
404
            return AVERROR_INVALIDDATA;
405
        }
406
    }
407
122
    return (context_count + 1) / 2;
408
}
409
410
49
static int read_extra_header(FFV1Context *f)
411
{
412
49
    RangeCoder *const c = &f->c;
413
    uint8_t state[CONTEXT_SIZE];
414
    int i, j, k, ret;
415
    uint8_t state2[32][CONTEXT_SIZE];
416
49
    unsigned crc = 0;
417
418
49
    memset(state2, 128, sizeof(state2));
419
49
    memset(state, 128, sizeof(state));
420
421
49
    ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
422
49
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
423
424
49
    f->version = get_symbol(c, state, 0);
425
49
    if (f->version < 2) {
426
        av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
427
        return AVERROR_INVALIDDATA;
428
    }
429
49
    if (f->version > 2) {
430
49
        c->bytestream_end -= 4;
431
49
        f->micro_version = get_symbol(c, state, 0);
432
49
        if (f->micro_version < 0)
433
            return AVERROR_INVALIDDATA;
434
    }
435
49
    f->ac = get_symbol(c, state, 0);
436
437
49
    if (f->ac == AC_RANGE_CUSTOM_TAB) {
438
6144
        for (i = 1; i < 256; i++)
439
6120
            f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
440
    }
441
442
49
    f->colorspace                 = get_symbol(c, state, 0); //YUV cs type
443
49
    f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
444
49
    f->chroma_planes              = get_rac(c, state);
445
49
    f->chroma_h_shift             = get_symbol(c, state, 0);
446
49
    f->chroma_v_shift             = get_symbol(c, state, 0);
447
49
    f->transparency               = get_rac(c, state);
448

49
    f->plane_count                = 1 + (f->chroma_planes || f->version<4) + f->transparency;
449
49
    f->num_h_slices               = 1 + get_symbol(c, state, 0);
450
49
    f->num_v_slices               = 1 + get_symbol(c, state, 0);
451
452

49
    if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
453
        av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
454
               f->chroma_h_shift, f->chroma_v_shift);
455
        return AVERROR_INVALIDDATA;
456
    }
457
458

49
    if (f->num_h_slices > (unsigned)f->width  || !f->num_h_slices ||
459

49
        f->num_v_slices > (unsigned)f->height || !f->num_v_slices
460
       ) {
461
        av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
462
        return AVERROR_INVALIDDATA;
463
    }
464
465
49
    f->quant_table_count = get_symbol(c, state, 0);
466

49
    if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
467
        av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
468
        f->quant_table_count = 0;
469
        return AVERROR_INVALIDDATA;
470
    }
471
472
147
    for (i = 0; i < f->quant_table_count; i++) {
473
98
        f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
474
98
        if (f->context_count[i] < 0) {
475
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
476
            return AVERROR_INVALIDDATA;
477
        }
478
    }
479
49
    if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
480
        return ret;
481
482
147
    for (i = 0; i < f->quant_table_count; i++)
483
98
        if (get_rac(c, state)) {
484
            for (j = 0; j < f->context_count[i]; j++)
485
                for (k = 0; k < CONTEXT_SIZE; k++) {
486
                    int pred = j ? f->initial_states[i][j - 1][k] : 128;
487
                    f->initial_states[i][j][k] =
488
                        (pred + get_symbol(c, state2[k], 1)) & 0xFF;
489
                }
490
        }
491
492
49
    if (f->version > 2) {
493
49
        f->ec = get_symbol(c, state, 0);
494
49
        if (f->micro_version > 2)
495
49
            f->intra = get_symbol(c, state, 0);
496
    }
497
498
49
    if (f->version > 2) {
499
        unsigned v;
500
98
        v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
501
49
                   f->avctx->extradata, f->avctx->extradata_size);
502

49
        if (v || f->avctx->extradata_size < 4) {
503
            av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
504
            return AVERROR_INVALIDDATA;
505
        }
506
49
        crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
507
    }
508
509
49
    if (f->avctx->debug & FF_DEBUG_PICT_INFO)
510
        av_log(f->avctx, AV_LOG_DEBUG,
511
               "global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",
512
               f->version, f->micro_version,
513
               f->ac,
514
               f->colorspace,
515
               f->avctx->bits_per_raw_sample,
516
               f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
517
               f->transparency,
518
               f->num_h_slices, f->num_v_slices,
519
               f->quant_table_count,
520
               f->ec,
521
               f->intra,
522
               crc
523
              );
524
49
    return 0;
525
}
526
527
169
static int read_header(FFV1Context *f)
528
{
529
    uint8_t state[CONTEXT_SIZE];
530
169
    int i, j, context_count = -1; //-1 to avoid warning
531
169
    RangeCoder *const c = &f->slice_context[0]->c;
532
533
169
    memset(state, 128, sizeof(state));
534
535
169
    if (f->version < 2) {
536
        int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
537
24
        unsigned v= get_symbol(c, state, 0);
538
24
        if (v >= 2) {
539
            av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
540
            return AVERROR_INVALIDDATA;
541
        }
542
24
        f->version = v;
543
24
        f->ac = get_symbol(c, state, 0);
544
545
24
        if (f->ac == AC_RANGE_CUSTOM_TAB) {
546
            for (i = 1; i < 256; i++) {
547
                int st = get_symbol(c, state, 1) + c->one_state[i];
548
                if (st < 1 || st > 255) {
549
                    av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
550
                    return AVERROR_INVALIDDATA;
551
                }
552
                f->state_transition[i] = st;
553
            }
554
        }
555
556
24
        colorspace          = get_symbol(c, state, 0); //YUV cs type
557
24
        bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
558
24
        chroma_planes       = get_rac(c, state);
559
24
        chroma_h_shift      = get_symbol(c, state, 0);
560
24
        chroma_v_shift      = get_symbol(c, state, 0);
561
24
        transparency        = get_rac(c, state);
562

24
        if (colorspace == 0 && f->avctx->skip_alpha)
563
            transparency = 0;
564
565
24
        if (f->plane_count) {
566
16
            if (colorspace          != f->colorspace                 ||
567
16
                bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
568
16
                chroma_planes       != f->chroma_planes              ||
569
16
                chroma_h_shift      != f->chroma_h_shift             ||
570
16
                chroma_v_shift      != f->chroma_v_shift             ||
571
16
                transparency        != f->transparency) {
572
                av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
573
                return AVERROR_INVALIDDATA;
574
            }
575
        }
576
577

24
        if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
578
            av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
579
                   chroma_h_shift, chroma_v_shift);
580
            return AVERROR_INVALIDDATA;
581
        }
582
583
24
        f->colorspace                 = colorspace;
584
24
        f->avctx->bits_per_raw_sample = bits_per_raw_sample;
585
24
        f->chroma_planes              = chroma_planes;
586
24
        f->chroma_h_shift             = chroma_h_shift;
587
24
        f->chroma_v_shift             = chroma_v_shift;
588
24
        f->transparency               = transparency;
589
590
24
        f->plane_count    = 2 + f->transparency;
591
    }
592
593
169
    if (f->colorspace == 0) {
594

121
        if (!f->transparency && !f->chroma_planes) {
595
            if (f->avctx->bits_per_raw_sample <= 8)
596
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
597
            else if (f->avctx->bits_per_raw_sample == 9) {
598
                f->packed_at_lsb = 1;
599
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY9;
600
            } else if (f->avctx->bits_per_raw_sample == 10) {
601
                f->packed_at_lsb = 1;
602
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
603
            } else if (f->avctx->bits_per_raw_sample == 12) {
604
                f->packed_at_lsb = 1;
605
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
606
            } else if (f->avctx->bits_per_raw_sample == 16) {
607
                f->packed_at_lsb = 1;
608
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
609
            } else if (f->avctx->bits_per_raw_sample < 16) {
610
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
611
            } else
612
                return AVERROR(ENOSYS);
613

121
        } else if (f->transparency && !f->chroma_planes) {
614
            if (f->avctx->bits_per_raw_sample <= 8)
615
                f->avctx->pix_fmt = AV_PIX_FMT_YA8;
616
            else
617
                return AVERROR(ENOSYS);
618

121
        } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
619

73
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
620
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
621
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
622
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
623
73
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
624
            case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
625
            case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
626
            }
627

121
        } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
628
            switch(16*f->chroma_h_shift + f->chroma_v_shift) {
629
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
630
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
631
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
632
            }
633

48
        } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
634
            f->packed_at_lsb = 1;
635
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
636
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
637
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
638
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
639
            }
640

48
        } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
641
            f->packed_at_lsb = 1;
642
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
643
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
644
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
645
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
646
            }
647

48
        } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
648
24
            f->packed_at_lsb = 1;
649

24
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
650
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
651
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P10; break;
652
24
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
653
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
654
            }
655

48
        } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
656
            f->packed_at_lsb = 1;
657
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
658
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
659
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
660
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
661
            }
662

24
        } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
663
            f->packed_at_lsb = 1;
664
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
665
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
666
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P12; break;
667
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
668
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
669
            }
670

24
        } else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
671
            f->packed_at_lsb = 1;
672
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
673
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P14; break;
674
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P14; break;
675
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P14; break;
676
            }
677

24
        } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
678
24
            f->packed_at_lsb = 1;
679

24
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
680
24
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
681
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
682
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
683
            }
684

24
        } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
685
            f->packed_at_lsb = 1;
686
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
687
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
688
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
689
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
690
            }
691
121
        }
692
48
    } else if (f->colorspace == 1) {
693

48
        if (f->chroma_h_shift || f->chroma_v_shift) {
694
            av_log(f->avctx, AV_LOG_ERROR,
695
                   "chroma subsampling not supported in this colorspace\n");
696
            return AVERROR(ENOSYS);
697
        }
698

48
        if (     f->avctx->bits_per_raw_sample <=  8 && !f->transparency)
699
24
            f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
700

24
        else if (f->avctx->bits_per_raw_sample <=  8 && f->transparency)
701
            f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
702

24
        else if (f->avctx->bits_per_raw_sample ==  9 && !f->transparency)
703
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
704

24
        else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
705
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
706

24
        else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
707
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
708

24
        else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
709
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
710

24
        else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
711
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
712

24
        else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
713
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
714

24
        else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
715
24
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
716
24
            f->use32bit = 1;
717
        }
718
        else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
719
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP16;
720
            f->use32bit = 1;
721
        }
722
    } else {
723
        av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
724
        return AVERROR(ENOSYS);
725
    }
726
169
    if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
727
        av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
728
        return AVERROR(ENOSYS);
729
    }
730
731
    ff_dlog(f->avctx, "%d %d %d\n",
732
            f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
733
169
    if (f->version < 2) {
734
24
        context_count = read_quant_tables(c, f->quant_table);
735
24
        if (context_count < 0) {
736
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
737
            return AVERROR_INVALIDDATA;
738
        }
739
24
        f->slice_count = f->max_slice_count;
740
145
    } else if (f->version < 3) {
741
        f->slice_count = get_symbol(c, state, 0);
742
    } else {
743
145
        const uint8_t *p = c->bytestream_end;
744
145
        for (f->slice_count = 0;
745

725
             f->slice_count < MAX_SLICES && 3 + 5*!!f->ec < p - c->bytestream_start;
746
580
             f->slice_count++) {
747
580
            int trailer = 3 + 5*!!f->ec;
748
580
            int size = AV_RB24(p-trailer);
749
580
            if (size + trailer > p - c->bytestream_start)
750
                break;
751
580
            p -= size + trailer;
752
        }
753
    }
754

169
    if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
755
        av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
756
        return AVERROR_INVALIDDATA;
757
    }
758
759
773
    for (j = 0; j < f->slice_count; j++) {
760
604
        FFV1Context *fs = f->slice_context[j];
761
604
        fs->ac            = f->ac;
762
604
        fs->packed_at_lsb = f->packed_at_lsb;
763
764
604
        fs->slice_damaged = 0;
765
766
604
        if (f->version == 2) {
767
            fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
768
            fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
769
            fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
770
            fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
771
772
            fs->slice_x     /= f->num_h_slices;
773
            fs->slice_y     /= f->num_v_slices;
774
            fs->slice_width  = fs->slice_width  / f->num_h_slices - fs->slice_x;
775
            fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
776
            if ((unsigned)fs->slice_width  > f->width ||
777
                (unsigned)fs->slice_height > f->height)
778
                return AVERROR_INVALIDDATA;
779
            if (   (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
780
                || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
781
                return AVERROR_INVALIDDATA;
782
        }
783
784
1812
        for (i = 0; i < f->plane_count; i++) {
785
1208
            PlaneContext *const p = &fs->plane[i];
786
787
1208
            if (f->version == 2) {
788
                int idx = get_symbol(c, state, 0);
789
                if (idx > (unsigned)f->quant_table_count) {
790
                    av_log(f->avctx, AV_LOG_ERROR,
791
                           "quant_table_index out of range\n");
792
                    return AVERROR_INVALIDDATA;
793
                }
794
                p->quant_table_index = idx;
795
                memcpy(p->quant_table, f->quant_tables[idx],
796
                       sizeof(p->quant_table));
797
                context_count = f->context_count[idx];
798
            } else {
799
1208
                memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
800
            }
801
802
1208
            if (f->version <= 2) {
803
48
                av_assert0(context_count >= 0);
804
48
                if (p->context_count < context_count) {
805
16
                    av_freep(&p->state);
806
16
                    av_freep(&p->vlc_state);
807
                }
808
48
                p->context_count = context_count;
809
            }
810
        }
811
    }
812
169
    return 0;
813
}
814
815
57
static av_cold int decode_init(AVCodecContext *avctx)
816
{
817
57
    FFV1Context *f = avctx->priv_data;
818
    int ret;
819
820
57
    if ((ret = ff_ffv1_common_init(avctx)) < 0)
821
        return ret;
822
823

57
    if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
824
        return ret;
825
826
57
    if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
827
        return ret;
828
829
57
    return 0;
830
}
831
832
1429
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
833
{
834
1429
    uint8_t *buf        = avpkt->data;
835
1429
    int buf_size        = avpkt->size;
836
1429
    FFV1Context *f      = avctx->priv_data;
837
1429
    RangeCoder *const c = &f->slice_context[0]->c;
838
    int i, ret;
839
1429
    uint8_t keystate = 128;
840
    uint8_t *buf_p;
841
    AVFrame *p;
842
843
1429
    if (f->last_picture.f)
844
1429
        ff_thread_release_buffer(avctx, &f->last_picture);
845
1429
    FFSWAP(ThreadFrame, f->picture, f->last_picture);
846
847
1429
    f->cur = p = f->picture.f;
848
849

1429
    if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
850
        /* we have interlaced material flagged in container */
851
        p->interlaced_frame = 1;
852
        if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
853
            p->top_field_first = 1;
854
    }
855
856
1429
    f->avctx = avctx;
857
1429
    ff_init_range_decoder(c, buf, buf_size);
858
1429
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
859
860
1429
    p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
861
1429
    if (get_rac(c, &keystate)) {
862
169
        p->key_frame    = 1;
863
169
        f->key_frame_ok = 0;
864
169
        if ((ret = read_header(f)) < 0)
865
            return ret;
866
169
        f->key_frame_ok = 1;
867
    } else {
868
1260
        if (!f->key_frame_ok) {
869
            av_log(avctx, AV_LOG_ERROR,
870
                   "Cannot decode non-keyframe without valid keyframe\n");
871
            return AVERROR_INVALIDDATA;
872
        }
873
1260
        p->key_frame = 0;
874
    }
875
876
1429
    if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
877
        return ret;
878
879
1429
    if (avctx->debug & FF_DEBUG_PICT_INFO)
880
        av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
881
               f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
882
883
1429
    ff_thread_finish_setup(avctx);
884
885
1429
    buf_p = buf + buf_size;
886
6533
    for (i = f->slice_count - 1; i >= 0; i--) {
887
5104
        FFV1Context *fs = f->slice_context[i];
888
5104
        int trailer = 3 + 5*!!f->ec;
889
        int v;
890
891

5104
        if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
892
204
        else                     v = buf_p - c->bytestream_start;
893
5104
        if (buf_p - c->bytestream_start < v) {
894
            av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
895
            ff_thread_report_progress(&f->picture, INT_MAX, 0);
896
            return AVERROR_INVALIDDATA;
897
        }
898
5104
        buf_p -= v;
899
900
5104
        if (f->ec) {
901
4900
            unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
902
4900
            if (crc) {
903
                int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
904
                av_log(f->avctx, AV_LOG_ERROR, "slice CRC mismatch %X!", crc);
905
                if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
906
                    av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
907
                } else if (ts != AV_NOPTS_VALUE) {
908
                    av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
909
                } else {
910
                    av_log(f->avctx, AV_LOG_ERROR, "\n");
911
                }
912
                fs->slice_damaged = 1;
913
            }
914
4900
            if (avctx->debug & FF_DEBUG_PICT_INFO) {
915
                av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
916
            }
917
        }
918
919
5104
        if (i) {
920
3675
            ff_init_range_decoder(&fs->c, buf_p, v);
921
        } else
922
1429
            fs->c.bytestream_end = buf_p + v;
923
924
5104
        fs->avctx = avctx;
925
5104
        fs->cur = p;
926
    }
927
928
1429
    avctx->execute(avctx,
929
                   decode_slice,
930
1429
                   &f->slice_context[0],
931
                   NULL,
932
                   f->slice_count,
933
                   sizeof(void*));
934
935
6533
    for (i = f->slice_count - 1; i >= 0; i--) {
936
5104
        FFV1Context *fs = f->slice_context[i];
937
        int j;
938

5104
        if (fs->slice_damaged && f->last_picture.f->data[0]) {
939
            const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
940
            const uint8_t *src[4];
941
            uint8_t *dst[4];
942
            ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
943
            for (j = 0; j < desc->nb_components; j++) {
944
                int pixshift = desc->comp[j].depth > 8;
945
                int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
946
                int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
947
                dst[j] = p->data[j] + p->linesize[j] *
948
                         (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
949
                src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
950
                         (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
951
952
            }
953
            if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
954
                desc->flags & FF_PSEUDOPAL) {
955
                dst[1] = p->data[1];
956
                src[1] = f->last_picture.f->data[1];
957
            }
958
            av_image_copy(dst, p->linesize, src,
959
                          f->last_picture.f->linesize,
960
                          avctx->pix_fmt,
961
                          fs->slice_width,
962
                          fs->slice_height);
963
        }
964
    }
965
1429
    ff_thread_report_progress(&f->picture, INT_MAX, 0);
966
967
1429
    f->picture_number++;
968
969
1429
    if (f->last_picture.f)
970
1429
        ff_thread_release_buffer(avctx, &f->last_picture);
971
1429
    f->cur = NULL;
972
1429
    if ((ret = av_frame_ref(data, f->picture.f)) < 0)
973
        return ret;
974
975
1429
    *got_frame = 1;
976
977
1429
    return buf_size;
978
}
979
980
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
981
{
982
    fsdst->version             = fsrc->version;
983
    fsdst->micro_version       = fsrc->micro_version;
984
    fsdst->chroma_planes       = fsrc->chroma_planes;
985
    fsdst->chroma_h_shift      = fsrc->chroma_h_shift;
986
    fsdst->chroma_v_shift      = fsrc->chroma_v_shift;
987
    fsdst->transparency        = fsrc->transparency;
988
    fsdst->plane_count         = fsrc->plane_count;
989
    fsdst->ac                  = fsrc->ac;
990
    fsdst->colorspace          = fsrc->colorspace;
991
992
    fsdst->ec                  = fsrc->ec;
993
    fsdst->intra               = fsrc->intra;
994
    fsdst->slice_damaged       = fssrc->slice_damaged;
995
    fsdst->key_frame_ok        = fsrc->key_frame_ok;
996
997
    fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
998
    fsdst->packed_at_lsb       = fsrc->packed_at_lsb;
999
    fsdst->slice_count         = fsrc->slice_count;
1000
    if (fsrc->version<3){
1001
        fsdst->slice_x             = fssrc->slice_x;
1002
        fsdst->slice_y             = fssrc->slice_y;
1003
        fsdst->slice_width         = fssrc->slice_width;
1004
        fsdst->slice_height        = fssrc->slice_height;
1005
    }
1006
}
1007
1008
#if HAVE_THREADS
1009
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1010
{
1011
    FFV1Context *fsrc = src->priv_data;
1012
    FFV1Context *fdst = dst->priv_data;
1013
    int i, ret;
1014
1015
    if (dst == src)
1016
        return 0;
1017
1018
    {
1019
        ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
1020
        uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
1021
        struct FFV1Context *slice_context[MAX_SLICES];
1022
        memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1023
        memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));
1024
1025
        memcpy(fdst, fsrc, sizeof(*fdst));
1026
        memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1027
        memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));
1028
        fdst->picture      = picture;
1029
        fdst->last_picture = last_picture;
1030
        for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1031
            FFV1Context *fssrc = fsrc->slice_context[i];
1032
            FFV1Context *fsdst = fdst->slice_context[i];
1033
            copy_fields(fsdst, fssrc, fsrc);
1034
        }
1035
        av_assert0(!fdst->plane[0].state);
1036
        av_assert0(!fdst->sample_buffer);
1037
    }
1038
1039
    av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
1040
1041
1042
    ff_thread_release_buffer(dst, &fdst->picture);
1043
    if (fsrc->picture.f->data[0]) {
1044
        if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1045
            return ret;
1046
    }
1047
1048
    fdst->fsrc = fsrc;
1049
1050
    return 0;
1051
}
1052
#endif
1053
1054
AVCodec ff_ffv1_decoder = {
1055
    .name           = "ffv1",
1056
    .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1057
    .type           = AVMEDIA_TYPE_VIDEO,
1058
    .id             = AV_CODEC_ID_FFV1,
1059
    .priv_data_size = sizeof(FFV1Context),
1060
    .init           = decode_init,
1061
    .close          = ff_ffv1_close,
1062
    .decode         = decode_frame,
1063
    .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1064
    .capabilities   = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1065
                      AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
1066
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_ALLOCATE_PROGRESS,
1067
};