GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ffv1dec.c Lines: 377 682 55.3 %
Date: 2019-11-20 04:07:19 Branches: 238 549 43.4 %

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 "libavutil/timer.h"
34
#include "avcodec.h"
35
#include "internal.h"
36
#include "get_bits.h"
37
#include "rangecoder.h"
38
#include "golomb.h"
39
#include "mathops.h"
40
#include "ffv1.h"
41
42
124612637
static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
43
                                               int is_signed)
44
{
45
124612637
    if (get_rac(c, state + 0))
46
52657552
        return 0;
47
    else {
48
        int i, e;
49
        unsigned a;
50
71955085
        e = 0;
51

577788167
        while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
52
505833082
            e++;
53
505833082
            if (e > 31)
54
                return AVERROR_INVALIDDATA;
55
        }
56
57
71955085
        a = 1;
58
577788167
        for (i = e - 1; i >= 0; i--)
59
505833082
            a += a + get_rac(c, state + 22 + FFMIN(i, 9));  // 22..31
60
61

71955085
        e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
62
71955085
        return (a ^ e) - e;
63
    }
64
}
65
66
53297
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
67
{
68
53297
    return get_symbol_inline(c, state, is_signed);
69
}
70
71
113342102
static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
72
                                 int bits)
73
{
74
    int k, i, v, ret;
75
76
113342102
    i = state->count;
77
113342102
    k = 0;
78
301739552
    while (i < state->error_sum) { // FIXME: optimize
79
188397450
        k++;
80
188397450
        i += i;
81
    }
82
83
113342102
    v = get_sr_golomb(gb, k, 12, bits);
84
    ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
85
            v, state->bias, state->error_sum, state->drift, state->count, k);
86
87
113342102
    v ^= ((2 * state->drift + state->count) >> 31);
88
89
113342102
    ret = fold(v + state->bias, bits);
90
91
113342102
    update_vlc_state(state, v);
92
93
113342102
    return ret;
94
}
95
96
3117384
static int is_input_end(FFV1Context *s)
97
{
98
3117384
    if (s->ac != AC_GOLOMB_RICE) {
99
1648728
        RangeCoder *const c = &s->c;
100
1648728
        if (c->overread > MAX_OVERREAD)
101
            return AVERROR_INVALIDDATA;
102
    } else {
103
1468656
        if (get_bits_left(&s->gb) < 1)
104
            return AVERROR_INVALIDDATA;
105
    }
106
3117384
    return 0;
107
}
108
109
#define TYPE int16_t
110
#define RENAME(name) name
111
#include "ffv1dec_template.c"
112
#undef TYPE
113
#undef RENAME
114
115
#define TYPE int32_t
116
#define RENAME(name) name ## 32
117
#include "ffv1dec_template.c"
118
119
10416
static int decode_plane(FFV1Context *s, uint8_t *src,
120
                         int w, int h, int stride, int plane_index,
121
                         int pixel_stride)
122
{
123
    int x, y;
124
    int16_t *sample[2];
125
10416
    sample[0] = s->sample_buffer + 3;
126
10416
    sample[1] = s->sample_buffer + w + 6 + 3;
127
128
10416
    s->run_index = 0;
129
130
10416
    memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
131
132
1019532
    for (y = 0; y < h; y++) {
133
1009116
        int16_t *temp = sample[0]; // FIXME: try a normal buffer
134
135
1009116
        sample[0] = sample[1];
136
1009116
        sample[1] = temp;
137
138
1009116
        sample[1][-1] = sample[0][0];
139
1009116
        sample[0][w]  = sample[0][w - 1];
140
141
// { START_TIMER
142
1009116
        if (s->avctx->bits_per_raw_sample <= 8) {
143
459540
            int ret = decode_line(s, w, sample, plane_index, 8);
144
459540
            if (ret < 0)
145
                return ret;
146
70681422
            for (x = 0; x < w; x++)
147
70221882
                src[x*pixel_stride + stride * y] = sample[1][x];
148
        } else {
149
549576
            int ret = decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
150
549576
            if (ret < 0)
151
                return ret;
152
549576
            if (s->packed_at_lsb) {
153
78400464
                for (x = 0; x < w; x++) {
154
77850888
                    ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
155
                }
156
            } else {
157
                for (x = 0; x < w; x++) {
158
                    ((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);
159
                }
160
            }
161
        }
162
// STOP_TIMER("decode-line") }
163
    }
164
10416
    return 0;
165
}
166
167
4900
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
168
{
169
4900
    RangeCoder *c = &fs->c;
170
    uint8_t state[CONTEXT_SIZE];
171
    unsigned ps, i, context_count;
172
4900
    memset(state, 128, sizeof(state));
173
174
4900
    av_assert0(f->version > 2);
175
176
4900
    fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
177
4900
    fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
178
4900
    fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
179
4900
    fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
180
181
4900
    fs->slice_x /= f->num_h_slices;
182
4900
    fs->slice_y /= f->num_v_slices;
183
4900
    fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;
184
4900
    fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
185

4900
    if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
186
        return -1;
187
4900
    if (    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
188
4900
         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
189
        return -1;
190
191
14700
    for (i = 0; i < f->plane_count; i++) {
192
9800
        PlaneContext * const p = &fs->plane[i];
193
9800
        int idx = get_symbol(c, state, 0);
194
9800
        if (idx >= (unsigned)f->quant_table_count) {
195
            av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
196
            return -1;
197
        }
198
9800
        p->quant_table_index = idx;
199
9800
        memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
200
9800
        context_count = f->context_count[idx];
201
202
9800
        if (p->context_count < context_count) {
203
392
            av_freep(&p->state);
204
392
            av_freep(&p->vlc_state);
205
        }
206
9800
        p->context_count = context_count;
207
    }
208
209
4900
    ps = get_symbol(c, state, 0);
210
4900
    if (ps == 1) {
211
        f->cur->interlaced_frame = 1;
212
        f->cur->top_field_first  = 1;
213
4900
    } else if (ps == 2) {
214
        f->cur->interlaced_frame = 1;
215
        f->cur->top_field_first  = 0;
216
4900
    } else if (ps == 3) {
217
4900
        f->cur->interlaced_frame = 0;
218
    }
219
4900
    f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
220
4900
    f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
221
222
4900
    if (av_image_check_sar(f->width, f->height,
223
4900
                           f->cur->sample_aspect_ratio) < 0) {
224
        av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
225
               f->cur->sample_aspect_ratio.num,
226
               f->cur->sample_aspect_ratio.den);
227
        f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
228
    }
229
230
4900
    if (fs->version > 3) {
231
        fs->slice_reset_contexts = get_rac(c, state);
232
        fs->slice_coding_mode = get_symbol(c, state, 0);
233
        if (fs->slice_coding_mode != 1) {
234
            fs->slice_rct_by_coef = get_symbol(c, state, 0);
235
            fs->slice_rct_ry_coef = get_symbol(c, state, 0);
236
            if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
237
                av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
238
                return AVERROR_INVALIDDATA;
239
            }
240
        }
241
    }
242
243
4900
    return 0;
244
}
245
246
5104
static int decode_slice(AVCodecContext *c, void *arg)
247
{
248
5104
    FFV1Context *fs   = *(void **)arg;
249
5104
    FFV1Context *f    = fs->avctx->priv_data;
250
    int width, height, x, y, ret;
251
5104
    const int ps      = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
252
5104
    AVFrame * const p = f->cur;
253
    int i, si;
254
255
12454
    for( si=0; fs != f->slice_context[si]; si ++)
256
        ;
257
258

5104
    if(f->fsrc && !p->key_frame)
259
        ff_thread_await_progress(&f->last_picture, si, 0);
260
261

5104
    if(f->fsrc && !p->key_frame) {
262
        FFV1Context *fssrc = f->fsrc->slice_context[si];
263
        FFV1Context *fsdst = f->slice_context[si];
264
        av_assert1(fsdst->plane_count == fssrc->plane_count);
265
        av_assert1(fsdst == fs);
266
267
        if (!p->key_frame)
268
            fsdst->slice_damaged |= fssrc->slice_damaged;
269
270
        for (i = 0; i < f->plane_count; i++) {
271
            PlaneContext *psrc = &fssrc->plane[i];
272
            PlaneContext *pdst = &fsdst->plane[i];
273
274
            av_free(pdst->state);
275
            av_free(pdst->vlc_state);
276
            memcpy(pdst, psrc, sizeof(*pdst));
277
            pdst->state = NULL;
278
            pdst->vlc_state = NULL;
279
280
            if (fssrc->ac) {
281
                pdst->state = av_malloc_array(CONTEXT_SIZE,  psrc->context_count);
282
                memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
283
            } else {
284
                pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
285
                memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
286
            }
287
        }
288
    }
289
290
5104
    fs->slice_rct_by_coef = 1;
291
5104
    fs->slice_rct_ry_coef = 1;
292
293
5104
    if (f->version > 2) {
294
4900
        if (ff_ffv1_init_slice_state(f, fs) < 0)
295
            return AVERROR(ENOMEM);
296
4900
        if (decode_slice_header(f, fs) < 0) {
297
            fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
298
            fs->slice_damaged = 1;
299
            return AVERROR_INVALIDDATA;
300
        }
301
    }
302
5104
    if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
303
        return ret;
304

5104
    if (f->cur->key_frame || fs->slice_reset_contexts)
305
604
        ff_ffv1_clear_slice_state(f, fs);
306
307
5104
    width  = fs->slice_width;
308
5104
    height = fs->slice_height;
309
5104
    x      = fs->slice_x;
310
5104
    y      = fs->slice_y;
311
312
5104
    if (fs->ac == AC_GOLOMB_RICE) {
313

2656
        if (f->version == 3 && f->micro_version > 1 || f->version > 3)
314
2452
            get_rac(&fs->c, (uint8_t[]) { 129 });
315

2656
        fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
316
2656
        init_get_bits(&fs->gb,
317
2656
                      fs->c.bytestream_start + fs->ac_byte_count,
318
2656
                      (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
319
    }
320
321
    av_assert1(width && height);
322

8576
    if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {
323
3472
        const int chroma_width  = AV_CEIL_RSHIFT(width,  f->chroma_h_shift);
324
3472
        const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
325
3472
        const int cx            = x >> f->chroma_h_shift;
326
3472
        const int cy            = y >> f->chroma_v_shift;
327
3472
        decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
328
329
3472
        if (f->chroma_planes) {
330
3472
            decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
331
3472
            decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
332
        }
333
3472
        if (fs->transparency)
334
            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);
335
1632
    } else if (f->colorspace == 0) {
336
         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0]    , width, height, p->linesize[0], 0, 2);
337
         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
338
1632
    } else if (f->use32bit) {
339
816
        uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
340
816
                               p->data[1] + ps * x + y * p->linesize[1],
341
816
                               p->data[2] + ps * x + y * p->linesize[2],
342
816
                               p->data[3] + ps * x + y * p->linesize[3] };
343
816
        decode_rgb_frame32(fs, planes, width, height, p->linesize);
344
    } else {
345
816
        uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
346
816
                               p->data[1] + ps * x + y * p->linesize[1],
347
816
                               p->data[2] + ps * x + y * p->linesize[2],
348
816
                               p->data[3] + ps * x + y * p->linesize[3] };
349
816
        decode_rgb_frame(fs, planes, width, height, p->linesize);
350
    }
351

5104
    if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
352
        int v;
353
2448
        get_rac(&fs->c, (uint8_t[]) { 129 });
354
2448
        v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
355
2448
        if (v) {
356
            av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
357
            fs->slice_damaged = 1;
358
        }
359
    }
360
361
5104
    emms_c();
362
363
5104
    ff_thread_report_progress(&f->picture, si, 0);
364
365
5104
    return 0;
366
}
367
368
610
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
369
{
370
    int v;
371
610
    int i = 0;
372
    uint8_t state[CONTEXT_SIZE];
373
374
610
    memset(state, 128, sizeof(state));
375
376
2979
    for (v = 0; i < 128; v++) {
377
2369
        unsigned len = get_symbol(c, state, 0) + 1U;
378
379

2369
        if (len > 128 - i || !len)
380
            return AVERROR_INVALIDDATA;
381
382
80449
        while (len--) {
383
78080
            quant_table[i] = scale * v;
384
78080
            i++;
385
        }
386
    }
387
388
78080
    for (i = 1; i < 128; i++)
389
77470
        quant_table[256 - i] = -quant_table[i];
390
610
    quant_table[128] = -quant_table[127];
391
392
610
    return 2 * v - 1;
393
}
394
395
122
static int read_quant_tables(RangeCoder *c,
396
                             int16_t quant_table[MAX_CONTEXT_INPUTS][256])
397
{
398
    int i;
399
122
    int context_count = 1;
400
401
732
    for (i = 0; i < 5; i++) {
402
610
        int ret = read_quant_table(c, quant_table[i], context_count);
403
610
        if (ret < 0)
404
            return ret;
405
610
        context_count *= ret;
406
610
        if (context_count > 32768U) {
407
            return AVERROR_INVALIDDATA;
408
        }
409
    }
410
122
    return (context_count + 1) / 2;
411
}
412
413
49
static int read_extra_header(FFV1Context *f)
414
{
415
49
    RangeCoder *const c = &f->c;
416
    uint8_t state[CONTEXT_SIZE];
417
    int i, j, k, ret;
418
    uint8_t state2[32][CONTEXT_SIZE];
419
49
    unsigned crc = 0;
420
421
49
    memset(state2, 128, sizeof(state2));
422
49
    memset(state, 128, sizeof(state));
423
424
49
    ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
425
49
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
426
427
49
    f->version = get_symbol(c, state, 0);
428
49
    if (f->version < 2) {
429
        av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
430
        return AVERROR_INVALIDDATA;
431
    }
432
49
    if (f->version > 2) {
433
49
        c->bytestream_end -= 4;
434
49
        f->micro_version = get_symbol(c, state, 0);
435
49
        if (f->micro_version < 0)
436
            return AVERROR_INVALIDDATA;
437
    }
438
49
    f->ac = get_symbol(c, state, 0);
439
440
49
    if (f->ac == AC_RANGE_CUSTOM_TAB) {
441
6144
        for (i = 1; i < 256; i++)
442
6120
            f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
443
    }
444
445
49
    f->colorspace                 = get_symbol(c, state, 0); //YUV cs type
446
49
    f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
447
49
    f->chroma_planes              = get_rac(c, state);
448
49
    f->chroma_h_shift             = get_symbol(c, state, 0);
449
49
    f->chroma_v_shift             = get_symbol(c, state, 0);
450
49
    f->transparency               = get_rac(c, state);
451

49
    f->plane_count                = 1 + (f->chroma_planes || f->version<4) + f->transparency;
452
49
    f->num_h_slices               = 1 + get_symbol(c, state, 0);
453
49
    f->num_v_slices               = 1 + get_symbol(c, state, 0);
454
455

49
    if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
456
        av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
457
               f->chroma_h_shift, f->chroma_v_shift);
458
        return AVERROR_INVALIDDATA;
459
    }
460
461

49
    if (f->num_h_slices > (unsigned)f->width  || !f->num_h_slices ||
462

49
        f->num_v_slices > (unsigned)f->height || !f->num_v_slices
463
       ) {
464
        av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
465
        return AVERROR_INVALIDDATA;
466
    }
467
468
49
    f->quant_table_count = get_symbol(c, state, 0);
469

49
    if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
470
        av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
471
        f->quant_table_count = 0;
472
        return AVERROR_INVALIDDATA;
473
    }
474
475
147
    for (i = 0; i < f->quant_table_count; i++) {
476
98
        f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
477
98
        if (f->context_count[i] < 0) {
478
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
479
            return AVERROR_INVALIDDATA;
480
        }
481
    }
482
49
    if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
483
        return ret;
484
485
147
    for (i = 0; i < f->quant_table_count; i++)
486
98
        if (get_rac(c, state)) {
487
            for (j = 0; j < f->context_count[i]; j++)
488
                for (k = 0; k < CONTEXT_SIZE; k++) {
489
                    int pred = j ? f->initial_states[i][j - 1][k] : 128;
490
                    f->initial_states[i][j][k] =
491
                        (pred + get_symbol(c, state2[k], 1)) & 0xFF;
492
                }
493
        }
494
495
49
    if (f->version > 2) {
496
49
        f->ec = get_symbol(c, state, 0);
497
49
        if (f->micro_version > 2)
498
49
            f->intra = get_symbol(c, state, 0);
499
    }
500
501
49
    if (f->version > 2) {
502
        unsigned v;
503
98
        v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
504
49
                   f->avctx->extradata, f->avctx->extradata_size);
505

49
        if (v || f->avctx->extradata_size < 4) {
506
            av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
507
            return AVERROR_INVALIDDATA;
508
        }
509
49
        crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
510
    }
511
512
49
    if (f->avctx->debug & FF_DEBUG_PICT_INFO)
513
        av_log(f->avctx, AV_LOG_DEBUG,
514
               "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",
515
               f->version, f->micro_version,
516
               f->ac,
517
               f->colorspace,
518
               f->avctx->bits_per_raw_sample,
519
               f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
520
               f->transparency,
521
               f->num_h_slices, f->num_v_slices,
522
               f->quant_table_count,
523
               f->ec,
524
               f->intra,
525
               crc
526
              );
527
49
    return 0;
528
}
529
530
169
static int read_header(FFV1Context *f)
531
{
532
    uint8_t state[CONTEXT_SIZE];
533
169
    int i, j, context_count = -1; //-1 to avoid warning
534
169
    RangeCoder *const c = &f->slice_context[0]->c;
535
536
169
    memset(state, 128, sizeof(state));
537
538
169
    if (f->version < 2) {
539
        int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
540
24
        unsigned v= get_symbol(c, state, 0);
541
24
        if (v >= 2) {
542
            av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
543
            return AVERROR_INVALIDDATA;
544
        }
545
24
        f->version = v;
546
24
        f->ac = get_symbol(c, state, 0);
547
548
24
        if (f->ac == AC_RANGE_CUSTOM_TAB) {
549
            for (i = 1; i < 256; i++) {
550
                int st = get_symbol(c, state, 1) + c->one_state[i];
551
                if (st < 1 || st > 255) {
552
                    av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
553
                    return AVERROR_INVALIDDATA;
554
                }
555
                f->state_transition[i] = st;
556
            }
557
        }
558
559
24
        colorspace          = get_symbol(c, state, 0); //YUV cs type
560
24
        bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
561
24
        chroma_planes       = get_rac(c, state);
562
24
        chroma_h_shift      = get_symbol(c, state, 0);
563
24
        chroma_v_shift      = get_symbol(c, state, 0);
564
24
        transparency        = get_rac(c, state);
565

24
        if (colorspace == 0 && f->avctx->skip_alpha)
566
            transparency = 0;
567
568
24
        if (f->plane_count) {
569
16
            if (colorspace          != f->colorspace                 ||
570
16
                bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
571
16
                chroma_planes       != f->chroma_planes              ||
572
16
                chroma_h_shift      != f->chroma_h_shift             ||
573
16
                chroma_v_shift      != f->chroma_v_shift             ||
574
16
                transparency        != f->transparency) {
575
                av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
576
                return AVERROR_INVALIDDATA;
577
            }
578
        }
579
580

24
        if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
581
            av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
582
                   chroma_h_shift, chroma_v_shift);
583
            return AVERROR_INVALIDDATA;
584
        }
585
586
24
        f->colorspace                 = colorspace;
587
24
        f->avctx->bits_per_raw_sample = bits_per_raw_sample;
588
24
        f->chroma_planes              = chroma_planes;
589
24
        f->chroma_h_shift             = chroma_h_shift;
590
24
        f->chroma_v_shift             = chroma_v_shift;
591
24
        f->transparency               = transparency;
592
593
24
        f->plane_count    = 2 + f->transparency;
594
    }
595
596
169
    if (f->colorspace == 0) {
597

121
        if (!f->transparency && !f->chroma_planes) {
598
            if (f->avctx->bits_per_raw_sample <= 8)
599
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
600
            else if (f->avctx->bits_per_raw_sample == 9) {
601
                f->packed_at_lsb = 1;
602
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY9;
603
            } else if (f->avctx->bits_per_raw_sample == 10) {
604
                f->packed_at_lsb = 1;
605
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
606
            } else if (f->avctx->bits_per_raw_sample == 12) {
607
                f->packed_at_lsb = 1;
608
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
609
            } else if (f->avctx->bits_per_raw_sample == 16) {
610
                f->packed_at_lsb = 1;
611
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
612
            } else if (f->avctx->bits_per_raw_sample < 16) {
613
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
614
            } else
615
                return AVERROR(ENOSYS);
616

121
        } else if (f->transparency && !f->chroma_planes) {
617
            if (f->avctx->bits_per_raw_sample <= 8)
618
                f->avctx->pix_fmt = AV_PIX_FMT_YA8;
619
            else
620
                return AVERROR(ENOSYS);
621

121
        } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
622

73
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
623
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
624
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
625
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
626
73
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
627
            case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
628
            case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
629
            }
630

121
        } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
631
            switch(16*f->chroma_h_shift + f->chroma_v_shift) {
632
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
633
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
634
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
635
            }
636

48
        } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
637
            f->packed_at_lsb = 1;
638
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
639
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
640
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
641
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
642
            }
643

48
        } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
644
            f->packed_at_lsb = 1;
645
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
646
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
647
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
648
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
649
            }
650

48
        } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
651
24
            f->packed_at_lsb = 1;
652

24
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
653
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
654
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P10; break;
655
24
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
656
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
657
            }
658

48
        } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
659
            f->packed_at_lsb = 1;
660
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
661
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
662
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
663
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
664
            }
665

24
        } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
666
            f->packed_at_lsb = 1;
667
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
668
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
669
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P12; break;
670
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
671
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
672
            }
673

24
        } else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
674
            f->packed_at_lsb = 1;
675
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
676
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P14; break;
677
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P14; break;
678
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P14; break;
679
            }
680

24
        } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
681
24
            f->packed_at_lsb = 1;
682

24
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
683
24
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
684
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
685
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
686
            }
687

24
        } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
688
            f->packed_at_lsb = 1;
689
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
690
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
691
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
692
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
693
            }
694
121
        }
695
48
    } else if (f->colorspace == 1) {
696

48
        if (f->chroma_h_shift || f->chroma_v_shift) {
697
            av_log(f->avctx, AV_LOG_ERROR,
698
                   "chroma subsampling not supported in this colorspace\n");
699
            return AVERROR(ENOSYS);
700
        }
701

48
        if (     f->avctx->bits_per_raw_sample <=  8 && !f->transparency)
702
24
            f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
703

24
        else if (f->avctx->bits_per_raw_sample <=  8 && f->transparency)
704
            f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
705

24
        else if (f->avctx->bits_per_raw_sample ==  9 && !f->transparency)
706
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
707

24
        else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
708
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
709

24
        else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
710
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
711

24
        else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
712
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
713

24
        else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
714
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
715

24
        else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
716
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
717

24
        else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
718
24
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
719
24
            f->use32bit = 1;
720
        }
721
        else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
722
            f->avctx->pix_fmt = AV_PIX_FMT_GBRAP16;
723
            f->use32bit = 1;
724
        }
725
    } else {
726
        av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
727
        return AVERROR(ENOSYS);
728
    }
729
169
    if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
730
        av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
731
        return AVERROR(ENOSYS);
732
    }
733
734
    ff_dlog(f->avctx, "%d %d %d\n",
735
            f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
736
169
    if (f->version < 2) {
737
24
        context_count = read_quant_tables(c, f->quant_table);
738
24
        if (context_count < 0) {
739
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
740
            return AVERROR_INVALIDDATA;
741
        }
742
24
        f->slice_count = f->max_slice_count;
743
145
    } else if (f->version < 3) {
744
        f->slice_count = get_symbol(c, state, 0);
745
    } else {
746
145
        const uint8_t *p = c->bytestream_end;
747
145
        for (f->slice_count = 0;
748

725
             f->slice_count < MAX_SLICES && 3 + 5*!!f->ec < p - c->bytestream_start;
749
580
             f->slice_count++) {
750
580
            int trailer = 3 + 5*!!f->ec;
751
580
            int size = AV_RB24(p-trailer);
752
580
            if (size + trailer > p - c->bytestream_start)
753
                break;
754
580
            p -= size + trailer;
755
        }
756
    }
757

169
    if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
758
        av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
759
        return AVERROR_INVALIDDATA;
760
    }
761
762
773
    for (j = 0; j < f->slice_count; j++) {
763
604
        FFV1Context *fs = f->slice_context[j];
764
604
        fs->ac            = f->ac;
765
604
        fs->packed_at_lsb = f->packed_at_lsb;
766
767
604
        fs->slice_damaged = 0;
768
769
604
        if (f->version == 2) {
770
            fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
771
            fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
772
            fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
773
            fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
774
775
            fs->slice_x     /= f->num_h_slices;
776
            fs->slice_y     /= f->num_v_slices;
777
            fs->slice_width  = fs->slice_width  / f->num_h_slices - fs->slice_x;
778
            fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
779
            if ((unsigned)fs->slice_width  > f->width ||
780
                (unsigned)fs->slice_height > f->height)
781
                return AVERROR_INVALIDDATA;
782
            if (   (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
783
                || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
784
                return AVERROR_INVALIDDATA;
785
        }
786
787
1812
        for (i = 0; i < f->plane_count; i++) {
788
1208
            PlaneContext *const p = &fs->plane[i];
789
790
1208
            if (f->version == 2) {
791
                int idx = get_symbol(c, state, 0);
792
                if (idx > (unsigned)f->quant_table_count) {
793
                    av_log(f->avctx, AV_LOG_ERROR,
794
                           "quant_table_index out of range\n");
795
                    return AVERROR_INVALIDDATA;
796
                }
797
                p->quant_table_index = idx;
798
                memcpy(p->quant_table, f->quant_tables[idx],
799
                       sizeof(p->quant_table));
800
                context_count = f->context_count[idx];
801
            } else {
802
1208
                memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
803
            }
804
805
1208
            if (f->version <= 2) {
806
48
                av_assert0(context_count >= 0);
807
48
                if (p->context_count < context_count) {
808
16
                    av_freep(&p->state);
809
16
                    av_freep(&p->vlc_state);
810
                }
811
48
                p->context_count = context_count;
812
            }
813
        }
814
    }
815
169
    return 0;
816
}
817
818
57
static av_cold int decode_init(AVCodecContext *avctx)
819
{
820
57
    FFV1Context *f = avctx->priv_data;
821
    int ret;
822
823
57
    if ((ret = ff_ffv1_common_init(avctx)) < 0)
824
        return ret;
825
826

57
    if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
827
        return ret;
828
829
57
    if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
830
        return ret;
831
832
57
    avctx->internal->allocate_progress = 1;
833
834
57
    return 0;
835
}
836
837
1429
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
838
{
839
1429
    uint8_t *buf        = avpkt->data;
840
1429
    int buf_size        = avpkt->size;
841
1429
    FFV1Context *f      = avctx->priv_data;
842
1429
    RangeCoder *const c = &f->slice_context[0]->c;
843
    int i, ret;
844
1429
    uint8_t keystate = 128;
845
    uint8_t *buf_p;
846
    AVFrame *p;
847
848
1429
    if (f->last_picture.f)
849
1429
        ff_thread_release_buffer(avctx, &f->last_picture);
850
1429
    FFSWAP(ThreadFrame, f->picture, f->last_picture);
851
852
1429
    f->cur = p = f->picture.f;
853
854

1429
    if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
855
        /* we have interlaced material flagged in container */
856
        p->interlaced_frame = 1;
857
        if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
858
            p->top_field_first = 1;
859
    }
860
861
1429
    f->avctx = avctx;
862
1429
    ff_init_range_decoder(c, buf, buf_size);
863
1429
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
864
865
1429
    p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
866
1429
    if (get_rac(c, &keystate)) {
867
169
        p->key_frame    = 1;
868
169
        f->key_frame_ok = 0;
869
169
        if ((ret = read_header(f)) < 0)
870
            return ret;
871
169
        f->key_frame_ok = 1;
872
    } else {
873
1260
        if (!f->key_frame_ok) {
874
            av_log(avctx, AV_LOG_ERROR,
875
                   "Cannot decode non-keyframe without valid keyframe\n");
876
            return AVERROR_INVALIDDATA;
877
        }
878
1260
        p->key_frame = 0;
879
    }
880
881
1429
    if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
882
        return ret;
883
884
1429
    if (avctx->debug & FF_DEBUG_PICT_INFO)
885
        av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
886
               f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
887
888
1429
    ff_thread_finish_setup(avctx);
889
890
1429
    buf_p = buf + buf_size;
891
6533
    for (i = f->slice_count - 1; i >= 0; i--) {
892
5104
        FFV1Context *fs = f->slice_context[i];
893
5104
        int trailer = 3 + 5*!!f->ec;
894
        int v;
895
896

5104
        if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
897
204
        else                     v = buf_p - c->bytestream_start;
898
5104
        if (buf_p - c->bytestream_start < v) {
899
            av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
900
            ff_thread_report_progress(&f->picture, INT_MAX, 0);
901
            return AVERROR_INVALIDDATA;
902
        }
903
5104
        buf_p -= v;
904
905
5104
        if (f->ec) {
906
4900
            unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
907
4900
            if (crc) {
908
                int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
909
                av_log(f->avctx, AV_LOG_ERROR, "slice CRC mismatch %X!", crc);
910
                if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
911
                    av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
912
                } else if (ts != AV_NOPTS_VALUE) {
913
                    av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
914
                } else {
915
                    av_log(f->avctx, AV_LOG_ERROR, "\n");
916
                }
917
                fs->slice_damaged = 1;
918
            }
919
4900
            if (avctx->debug & FF_DEBUG_PICT_INFO) {
920
                av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
921
            }
922
        }
923
924
5104
        if (i) {
925
3675
            ff_init_range_decoder(&fs->c, buf_p, v);
926
        } else
927
1429
            fs->c.bytestream_end = buf_p + v;
928
929
5104
        fs->avctx = avctx;
930
5104
        fs->cur = p;
931
    }
932
933
1429
    avctx->execute(avctx,
934
                   decode_slice,
935
1429
                   &f->slice_context[0],
936
                   NULL,
937
                   f->slice_count,
938
                   sizeof(void*));
939
940
6533
    for (i = f->slice_count - 1; i >= 0; i--) {
941
5104
        FFV1Context *fs = f->slice_context[i];
942
        int j;
943

5104
        if (fs->slice_damaged && f->last_picture.f->data[0]) {
944
            const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
945
            const uint8_t *src[4];
946
            uint8_t *dst[4];
947
            ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
948
            for (j = 0; j < desc->nb_components; j++) {
949
                int pixshift = desc->comp[j].depth > 8;
950
                int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
951
                int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
952
                dst[j] = p->data[j] + p->linesize[j] *
953
                         (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
954
                src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
955
                         (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
956
957
            }
958
            if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
959
                desc->flags & FF_PSEUDOPAL) {
960
                dst[1] = p->data[1];
961
                src[1] = f->last_picture.f->data[1];
962
            }
963
            av_image_copy(dst, p->linesize, src,
964
                          f->last_picture.f->linesize,
965
                          avctx->pix_fmt,
966
                          fs->slice_width,
967
                          fs->slice_height);
968
        }
969
    }
970
1429
    ff_thread_report_progress(&f->picture, INT_MAX, 0);
971
972
1429
    f->picture_number++;
973
974
1429
    if (f->last_picture.f)
975
1429
        ff_thread_release_buffer(avctx, &f->last_picture);
976
1429
    f->cur = NULL;
977
1429
    if ((ret = av_frame_ref(data, f->picture.f)) < 0)
978
        return ret;
979
980
1429
    *got_frame = 1;
981
982
1429
    return buf_size;
983
}
984
985
#if HAVE_THREADS
986
static int init_thread_copy(AVCodecContext *avctx)
987
{
988
    FFV1Context *f = avctx->priv_data;
989
    int i, ret;
990
991
    f->picture.f      = NULL;
992
    f->last_picture.f = NULL;
993
    f->sample_buffer  = NULL;
994
    f->max_slice_count = 0;
995
    f->slice_count = 0;
996
997
    for (i = 0; i < f->quant_table_count; i++) {
998
        av_assert0(f->version > 1);
999
        f->initial_states[i] = av_memdup(f->initial_states[i],
1000
                                         f->context_count[i] * sizeof(*f->initial_states[i]));
1001
    }
1002
1003
    f->picture.f      = av_frame_alloc();
1004
    f->last_picture.f = av_frame_alloc();
1005
1006
    if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
1007
        return ret;
1008
1009
    return 0;
1010
}
1011
#endif
1012
1013
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
1014
{
1015
    fsdst->version             = fsrc->version;
1016
    fsdst->micro_version       = fsrc->micro_version;
1017
    fsdst->chroma_planes       = fsrc->chroma_planes;
1018
    fsdst->chroma_h_shift      = fsrc->chroma_h_shift;
1019
    fsdst->chroma_v_shift      = fsrc->chroma_v_shift;
1020
    fsdst->transparency        = fsrc->transparency;
1021
    fsdst->plane_count         = fsrc->plane_count;
1022
    fsdst->ac                  = fsrc->ac;
1023
    fsdst->colorspace          = fsrc->colorspace;
1024
1025
    fsdst->ec                  = fsrc->ec;
1026
    fsdst->intra               = fsrc->intra;
1027
    fsdst->slice_damaged       = fssrc->slice_damaged;
1028
    fsdst->key_frame_ok        = fsrc->key_frame_ok;
1029
1030
    fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
1031
    fsdst->packed_at_lsb       = fsrc->packed_at_lsb;
1032
    fsdst->slice_count         = fsrc->slice_count;
1033
    if (fsrc->version<3){
1034
        fsdst->slice_x             = fssrc->slice_x;
1035
        fsdst->slice_y             = fssrc->slice_y;
1036
        fsdst->slice_width         = fssrc->slice_width;
1037
        fsdst->slice_height        = fssrc->slice_height;
1038
    }
1039
}
1040
1041
#if HAVE_THREADS
1042
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1043
{
1044
    FFV1Context *fsrc = src->priv_data;
1045
    FFV1Context *fdst = dst->priv_data;
1046
    int i, ret;
1047
1048
    if (dst == src)
1049
        return 0;
1050
1051
    {
1052
        ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
1053
        uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
1054
        struct FFV1Context *slice_context[MAX_SLICES];
1055
        memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1056
        memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));
1057
1058
        memcpy(fdst, fsrc, sizeof(*fdst));
1059
        memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1060
        memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));
1061
        fdst->picture      = picture;
1062
        fdst->last_picture = last_picture;
1063
        for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1064
            FFV1Context *fssrc = fsrc->slice_context[i];
1065
            FFV1Context *fsdst = fdst->slice_context[i];
1066
            copy_fields(fsdst, fssrc, fsrc);
1067
        }
1068
        av_assert0(!fdst->plane[0].state);
1069
        av_assert0(!fdst->sample_buffer);
1070
    }
1071
1072
    av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
1073
1074
1075
    ff_thread_release_buffer(dst, &fdst->picture);
1076
    if (fsrc->picture.f->data[0]) {
1077
        if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1078
            return ret;
1079
    }
1080
1081
    fdst->fsrc = fsrc;
1082
1083
    return 0;
1084
}
1085
#endif
1086
1087
AVCodec ff_ffv1_decoder = {
1088
    .name           = "ffv1",
1089
    .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1090
    .type           = AVMEDIA_TYPE_VIDEO,
1091
    .id             = AV_CODEC_ID_FFV1,
1092
    .priv_data_size = sizeof(FFV1Context),
1093
    .init           = decode_init,
1094
    .close          = ff_ffv1_close,
1095
    .decode         = decode_frame,
1096
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
1097
    .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1098
    .capabilities   = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1099
                      AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
1100
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP
1101
};