ffv1dec.c 39.5 KB
Newer Older
1 2 3
/*
 * FFV1 decoder
 *
4
 * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * FF Video Codec 1 (a lossless codec) decoder
 */

#include "libavutil/avassert.h"
#include "libavutil/crc.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timer.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
#include "ffv1.h"

static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
                                               int is_signed)
{
    if (get_rac(c, state + 0))
        return 0;
    else {
        int i, e, a;
        e = 0;
        while (get_rac(c, state + 1 + FFMIN(e, 9))) // 1..10
            e++;

        a = 1;
        for (i = e - 1; i >= 0; i--)
            a += a + get_rac(c, state + 22 + FFMIN(i, 9));  // 22..31

        e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
        return (a ^ e) - e;
    }
}

static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
{
    return get_symbol_inline(c, state, is_signed);
}

static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
                                 int bits)
{
    int k, i, v, ret;

    i = state->count;
    k = 0;
    while (i < state->error_sum) { // FIXME: optimize
        k++;
        i += i;
    }

    v = get_sr_golomb(gb, k, 12, bits);
80
    ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
            v, state->bias, state->error_sum, state->drift, state->count, k);

#if 0 // JPEG LS
    if (k == 0 && 2 * state->drift <= -state->count)
        v ^= (-1);
#else
    v ^= ((2 * state->drift + state->count) >> 31);
#endif

    ret = fold(v + state->bias, bits);

    update_vlc_state(state, v);

    return ret;
}

static av_always_inline void decode_line(FFV1Context *s, int w,
                                         int16_t *sample[2],
                                         int plane_index, int bits)
{
    PlaneContext *const p = &s->plane[plane_index];
    RangeCoder *const c   = &s->c;
    int x;
    int run_count = 0;
    int run_mode  = 0;
    int run_index = s->run_index;

108 109 110 111 112 113 114 115 116 117 118 119 120
    if (s->slice_coding_mode == 1) {
        int i;
        for (x = 0; x < w; x++) {
            int v = 0;
            for (i=0; i<bits; i++) {
                uint8_t state = 128;
                v += v + get_rac(c, &state);
            }
            sample[1][x] = v;
        }
        return;
    }

121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
    for (x = 0; x < w; x++) {
        int diff, context, sign;

        context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
        if (context < 0) {
            context = -context;
            sign    = 1;
        } else
            sign = 0;

        av_assert2(context < p->context_count);

        if (s->ac) {
            diff = get_symbol_inline(c, p->state[context], 1);
        } else {
            if (context == 0 && run_mode == 0)
                run_mode = 1;

            if (run_mode) {
                if (run_count == 0 && run_mode == 1) {
                    if (get_bits1(&s->gb)) {
                        run_count = 1 << ff_log2_run[run_index];
                        if (x + run_count <= w)
                            run_index++;
                    } else {
                        if (ff_log2_run[run_index])
                            run_count = get_bits(&s->gb, ff_log2_run[run_index]);
                        else
                            run_count = 0;
                        if (run_index)
                            run_index--;
                        run_mode = 2;
                    }
                }
                run_count--;
                if (run_count < 0) {
                    run_mode  = 0;
                    run_count = 0;
                    diff      = get_vlc_symbol(&s->gb, &p->vlc_state[context],
                                               bits);
                    if (diff >= 0)
                        diff++;
                } else
                    diff = 0;
            } else
                diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

168
            ff_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
169 170 171 172 173 174
                    run_count, run_index, run_mode, x, get_bits_count(&s->gb));
        }

        if (sign)
            diff = -diff;

175
        sample[1][x] = av_mod_uintp2(predict(sample[1] + x, sample[0] + x) + diff, bits);
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225
    }
    s->run_index = run_index;
}

static void decode_plane(FFV1Context *s, uint8_t *src,
                         int w, int h, int stride, int plane_index)
{
    int x, y;
    int16_t *sample[2];
    sample[0] = s->sample_buffer + 3;
    sample[1] = s->sample_buffer + w + 6 + 3;

    s->run_index = 0;

    memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));

    for (y = 0; y < h; y++) {
        int16_t *temp = sample[0]; // FIXME: try a normal buffer

        sample[0] = sample[1];
        sample[1] = temp;

        sample[1][-1] = sample[0][0];
        sample[0][w]  = sample[0][w - 1];

// { START_TIMER
        if (s->avctx->bits_per_raw_sample <= 8) {
            decode_line(s, w, sample, plane_index, 8);
            for (x = 0; x < w; x++)
                src[x + stride * y] = sample[1][x];
        } else {
            decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
            if (s->packed_at_lsb) {
                for (x = 0; x < w; x++) {
                    ((uint16_t*)(src + stride*y))[x] = sample[1][x];
                }
            } else {
                for (x = 0; x < w; x++) {
                    ((uint16_t*)(src + stride*y))[x] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
                }
            }
        }
// STOP_TIMER("decode-line") }
    }
}

static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
{
    int x, y, p;
    int16_t *sample[4][2];
226 227
    int lbd    = s->avctx->bits_per_raw_sample <= 8;
    int bits   = s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;
228
    int offset = 1 << bits;
229

230 231 232 233 234 235 236
    for (x = 0; x < 4; x++) {
        sample[x][0] = s->sample_buffer +  x * 2      * (w + 6) + 3;
        sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
    }

    s->run_index = 0;

237
    memset(s->sample_buffer, 0, 8 * (w + 6) * sizeof(*s->sample_buffer));
238 239 240 241 242 243 244 245 246 247

    for (y = 0; y < h; y++) {
        for (p = 0; p < 3 + s->transparency; p++) {
            int16_t *temp = sample[p][0]; // FIXME: try a normal buffer

            sample[p][0] = sample[p][1];
            sample[p][1] = temp;

            sample[p][1][-1]= sample[p][0][0  ];
            sample[p][0][ w]= sample[p][0][w-1];
248
            if (lbd && s->slice_coding_mode == 0)
249
                decode_line(s, w, sample[p], (p + 1)/2, 9);
250
            else
251
                decode_line(s, w, sample[p], (p + 1)/2, bits + (s->slice_coding_mode != 1));
252 253 254 255 256 257 258
        }
        for (x = 0; x < w; x++) {
            int g = sample[0][1][x];
            int b = sample[1][1][x];
            int r = sample[2][1][x];
            int a = sample[3][1][x];

259 260 261
            if (s->slice_coding_mode != 1) {
                b -= offset;
                r -= offset;
262
                g -= (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2;
263 264 265
                b += g;
                r += g;
            }
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321

            if (lbd)
                *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + (g<<8) + (r<<16) + (a<<24);
            else {
                *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;
                *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;
                *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
            }
        }
    }
}

static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
{
    RangeCoder *c = &fs->c;
    uint8_t state[CONTEXT_SIZE];
    unsigned ps, i, context_count;
    memset(state, 128, sizeof(state));

    av_assert0(f->version > 2);

    fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
    fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
    fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
    fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;

    fs->slice_x /= f->num_h_slices;
    fs->slice_y /= f->num_v_slices;
    fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;
    fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
    if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
        return -1;
    if (    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
        return -1;

    for (i = 0; i < f->plane_count; i++) {
        PlaneContext * const p = &fs->plane[i];
        int idx = get_symbol(c, state, 0);
        if (idx > (unsigned)f->quant_table_count) {
            av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
            return -1;
        }
        p->quant_table_index = idx;
        memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
        context_count = f->context_count[idx];

        if (p->context_count < context_count) {
            av_freep(&p->state);
            av_freep(&p->vlc_state);
        }
        p->context_count = context_count;
    }

    ps = get_symbol(c, state, 0);
    if (ps == 1) {
322 323
        f->cur->interlaced_frame = 1;
        f->cur->top_field_first  = 1;
324
    } else if (ps == 2) {
325 326
        f->cur->interlaced_frame = 1;
        f->cur->top_field_first  = 0;
327
    } else if (ps == 3) {
328
        f->cur->interlaced_frame = 0;
329
    }
330 331
    f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
    f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
332

333 334 335 336 337 338 339 340
    if (av_image_check_sar(f->width, f->height,
                           f->cur->sample_aspect_ratio) < 0) {
        av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
               f->cur->sample_aspect_ratio.num,
               f->cur->sample_aspect_ratio.den);
        f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
    }

341 342 343
    if (fs->version > 3) {
        fs->slice_reset_contexts = get_rac(c, state);
        fs->slice_coding_mode = get_symbol(c, state, 0);
344
        if (fs->slice_coding_mode != 1) {
345 346 347
            fs->slice_rct_by_coef = get_symbol(c, state, 0);
            fs->slice_rct_ry_coef = get_symbol(c, state, 0);
            if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
348 349 350 351
                av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
                return AVERROR_INVALIDDATA;
            }
        }
352
    }
353

354 355 356 357 358
    return 0;
}

static int decode_slice(AVCodecContext *c, void *arg)
{
359 360
    FFV1Context *fs   = *(void **)arg;
    FFV1Context *f    = fs->avctx->priv_data;
361
    int width, height, x, y, ret;
362
    const int ps      = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step_minus1 + 1;
363
    AVFrame * const p = f->cur;
364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391
    int i, si;

    for( si=0; fs != f->slice_context[si]; si ++)
        ;

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

    if(f->fsrc && !p->key_frame) {
        FFV1Context *fssrc = f->fsrc->slice_context[si];
        FFV1Context *fsdst = f->slice_context[si];
        av_assert1(fsdst->plane_count == fssrc->plane_count);
        av_assert1(fsdst == fs);

        if (!p->key_frame)
            fsdst->slice_damaged |= fssrc->slice_damaged;

        for (i = 0; i < f->plane_count; i++) {
            PlaneContext *psrc = &fssrc->plane[i];
            PlaneContext *pdst = &fsdst->plane[i];

            av_free(pdst->state);
            av_free(pdst->vlc_state);
            memcpy(pdst, psrc, sizeof(*pdst));
            pdst->state = NULL;
            pdst->vlc_state = NULL;

            if (fssrc->ac) {
392
                pdst->state = av_malloc_array(CONTEXT_SIZE,  psrc->context_count);
393 394
                memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
            } else {
395
                pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
396 397 398 399
                memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
            }
        }
    }
400

401 402
    fs->slice_rct_by_coef = 1;
    fs->slice_rct_ry_coef = 1;
403

404 405 406 407 408 409 410 411
    if (f->version > 2) {
        if (ffv1_init_slice_state(f, fs) < 0)
            return AVERROR(ENOMEM);
        if (decode_slice_header(f, fs) < 0) {
            fs->slice_damaged = 1;
            return AVERROR_INVALIDDATA;
        }
    }
412 413
    if ((ret = ffv1_init_slice_state(f, fs)) < 0)
        return ret;
414
    if (f->cur->key_frame || fs->slice_reset_contexts)
415
        ffv1_clear_slice_state(f, fs);
416

417 418 419 420
    width  = fs->slice_width;
    height = fs->slice_height;
    x      = fs->slice_x;
    y      = fs->slice_y;
421 422

    if (!fs->ac) {
423
        if (f->version == 3 && f->micro_version > 1 || f->version > 3)
424 425
            get_rac(&fs->c, (uint8_t[]) { 129 });
        fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
426 427 428 429 430 431 432
        init_get_bits(&fs->gb,
                      fs->c.bytestream_start + fs->ac_byte_count,
                      (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
    }

    av_assert1(width && height);
    if (f->colorspace == 0) {
433 434
        const int chroma_width  = FF_CEIL_RSHIFT(width,  f->chroma_h_shift);
        const int chroma_height = FF_CEIL_RSHIFT(height, f->chroma_v_shift);
435 436 437 438 439 440 441 442 443
        const int cx            = x >> f->chroma_h_shift;
        const int cy            = y >> f->chroma_v_shift;
        decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

        if (f->chroma_planes) {
            decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);
            decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);
        }
        if (fs->transparency)
444
            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);
445
    } else {
446 447 448
        uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
                               p->data[1] + ps * x + y * p->linesize[1],
                               p->data[2] + ps * x + y * p->linesize[2] };
449 450 451 452
        decode_rgb_frame(fs, planes, width, height, p->linesize);
    }
    if (fs->ac && f->version > 2) {
        int v;
453
        get_rac(&fs->c, (uint8_t[]) { 129 });
454 455 456 457 458 459 460 461 462
        v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
        if (v) {
            av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
            fs->slice_damaged = 1;
        }
    }

    emms_c();

463 464
    ff_thread_report_progress(&f->picture, si, 0);

465 466 467 468 469 470 471 472 473 474 475 476 477 478
    return 0;
}

static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
{
    int v;
    int i = 0;
    uint8_t state[CONTEXT_SIZE];

    memset(state, 128, sizeof(state));

    for (v = 0; i < 128; v++) {
        unsigned len = get_symbol(c, state, 0) + 1;

479
        if (len > 128 - i || !len)
Luca Barbato's avatar
Luca Barbato committed
480
            return AVERROR_INVALIDDATA;
481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503

        while (len--) {
            quant_table[i] = scale * v;
            i++;
        }
    }

    for (i = 1; i < 128; i++)
        quant_table[256 - i] = -quant_table[i];
    quant_table[128] = -quant_table[127];

    return 2 * v - 1;
}

static int read_quant_tables(RangeCoder *c,
                             int16_t quant_table[MAX_CONTEXT_INPUTS][256])
{
    int i;
    int context_count = 1;

    for (i = 0; i < 5; i++) {
        context_count *= read_quant_table(c, quant_table[i], context_count);
        if (context_count > 32768U) {
Luca Barbato's avatar
Luca Barbato committed
504
            return AVERROR_INVALIDDATA;
505 506 507 508 509 510 511 512 513
        }
    }
    return (context_count + 1) / 2;
}

static int read_extra_header(FFV1Context *f)
{
    RangeCoder *const c = &f->c;
    uint8_t state[CONTEXT_SIZE];
514
    int i, j, k, ret;
515 516 517 518 519 520 521 522 523
    uint8_t state2[32][CONTEXT_SIZE];

    memset(state2, 128, sizeof(state2));
    memset(state, 128, sizeof(state));

    ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

    f->version = get_symbol(c, state, 0);
524 525 526 527
    if (f->version < 2) {
        av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
        return AVERROR_INVALIDDATA;
    }
528 529
    if (f->version > 2) {
        c->bytestream_end -= 4;
530
        f->micro_version = get_symbol(c, state, 0);
531 532
        if (f->micro_version < 0)
            return AVERROR_INVALIDDATA;
533 534
    }
    f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
535
    if (f->ac > 1) {
536 537
        for (i = 1; i < 256; i++)
            f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
538
    }
539

540
    f->colorspace                 = get_symbol(c, state, 0); //YUV cs type
541
    f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
542 543 544 545
    f->chroma_planes              = get_rac(c, state);
    f->chroma_h_shift             = get_symbol(c, state, 0);
    f->chroma_v_shift             = get_symbol(c, state, 0);
    f->transparency               = get_rac(c, state);
546
    f->plane_count                = 1 + (f->chroma_planes || f->version<4) + f->transparency;
547 548
    f->num_h_slices               = 1 + get_symbol(c, state, 0);
    f->num_v_slices               = 1 + get_symbol(c, state, 0);
549

550 551 552 553 554 555
    if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
        av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
               f->chroma_h_shift, f->chroma_v_shift);
        return AVERROR_INVALIDDATA;
    }

556 557 558 559
    if (f->num_h_slices > (unsigned)f->width  || !f->num_h_slices ||
        f->num_v_slices > (unsigned)f->height || !f->num_v_slices
       ) {
        av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
Luca Barbato's avatar
Luca Barbato committed
560
        return AVERROR_INVALIDDATA;
561 562 563 564
    }

    f->quant_table_count = get_symbol(c, state, 0);
    if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
Luca Barbato's avatar
Luca Barbato committed
565
        return AVERROR_INVALIDDATA;
566 567 568 569 570

    for (i = 0; i < f->quant_table_count; i++) {
        f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
        if (f->context_count[i] < 0) {
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
571
            return AVERROR_INVALIDDATA;
572 573
        }
    }
574 575
    if ((ret = ffv1_allocate_initial_states(f)) < 0)
        return ret;
576 577

    for (i = 0; i < f->quant_table_count; i++)
578
        if (get_rac(c, state)) {
579 580 581 582 583 584
            for (j = 0; j < f->context_count[i]; j++)
                for (k = 0; k < CONTEXT_SIZE; k++) {
                    int pred = j ? f->initial_states[i][j - 1][k] : 128;
                    f->initial_states[i][j][k] =
                        (pred + get_symbol(c, state2[k], 1)) & 0xFF;
                }
585
        }
586 587 588

    if (f->version > 2) {
        f->ec = get_symbol(c, state, 0);
589
        if (f->micro_version > 2)
590
            f->intra = get_symbol(c, state, 0);
591 592 593 594
    }

    if (f->version > 2) {
        unsigned v;
595 596
        v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
                   f->avctx->extradata, f->avctx->extradata_size);
597 598 599 600 601 602
        if (v) {
            av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
            return AVERROR_INVALIDDATA;
        }
    }

603 604 605
    if (f->avctx->debug & FF_DEBUG_PICT_INFO)
        av_log(f->avctx, AV_LOG_DEBUG,
               "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\n",
606
               f->version, f->micro_version,
607 608 609 610 611 612 613 614 615 616
               f->ac,
               f->colorspace,
               f->avctx->bits_per_raw_sample,
               f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
               f->transparency,
               f->num_h_slices, f->num_v_slices,
               f->quant_table_count,
               f->ec,
               f->intra
              );
617 618 619 620 621 622 623 624 625 626 627 628
    return 0;
}

static int read_header(FFV1Context *f)
{
    uint8_t state[CONTEXT_SIZE];
    int i, j, context_count = -1; //-1 to avoid warning
    RangeCoder *const c = &f->slice_context[0]->c;

    memset(state, 128, sizeof(state));

    if (f->version < 2) {
629
        int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
630 631 632 633 634 635 636
        unsigned v= get_symbol(c, state, 0);
        if (v >= 2) {
            av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
            return AVERROR_INVALIDDATA;
        }
        f->version = v;
        f->ac      = f->avctx->coder_type = get_symbol(c, state, 0);
637
        if (f->ac > 1) {
638 639
            for (i = 1; i < 256; i++)
                f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
640 641
        }

642
        colorspace          = get_symbol(c, state, 0); //YUV cs type
643
        bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
644 645 646 647
        chroma_planes       = get_rac(c, state);
        chroma_h_shift      = get_symbol(c, state, 0);
        chroma_v_shift      = get_symbol(c, state, 0);
        transparency        = get_rac(c, state);
648 649
        if (colorspace == 0 && f->avctx->skip_alpha)
            transparency = 0;
650 651

        if (f->plane_count) {
652 653 654 655 656 657
            if (colorspace          != f->colorspace                 ||
                bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
                chroma_planes       != f->chroma_planes              ||
                chroma_h_shift      != f->chroma_h_shift             ||
                chroma_v_shift      != f->chroma_v_shift             ||
                transparency        != f->transparency) {
658 659 660 661 662
                av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
                return AVERROR_INVALIDDATA;
            }
        }

663 664 665 666 667 668
        if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
            av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
                   chroma_h_shift, chroma_v_shift);
            return AVERROR_INVALIDDATA;
        }

669
        f->colorspace                 = colorspace;
670
        f->avctx->bits_per_raw_sample = bits_per_raw_sample;
671 672 673 674
        f->chroma_planes              = chroma_planes;
        f->chroma_h_shift             = chroma_h_shift;
        f->chroma_v_shift             = chroma_v_shift;
        f->transparency               = transparency;
675

676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
        f->plane_count    = 2 + f->transparency;
    }

    if (f->colorspace == 0) {
        if (!f->transparency && !f->chroma_planes) {
            if (f->avctx->bits_per_raw_sample <= 8)
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
            else
                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
        } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
            case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
            case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
            case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
            }
        } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
            switch(16*f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
            }
700
        } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
701 702 703 704 705 706
            f->packed_at_lsb = 1;
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
            }
707 708 709 710 711 712 713
        } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
            f->packed_at_lsb = 1;
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
            }
714
        } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
715 716 717 718 719 720
            f->packed_at_lsb = 1;
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
            }
721 722 723 724 725 726 727
        } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
            f->packed_at_lsb = 1;
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
            }
728
        } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
729 730 731 732 733
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
            }
734 735 736 737 738 739
        } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
            switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
            case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
            case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
            case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
            }
740 741 742 743 744
        }
    } else if (f->colorspace == 1) {
        if (f->chroma_h_shift || f->chroma_v_shift) {
            av_log(f->avctx, AV_LOG_ERROR,
                   "chroma subsampling not supported in this colorspace\n");
Luca Barbato's avatar
Luca Barbato committed
745
            return AVERROR(ENOSYS);
746 747 748 749 750 751 752 753 754 755 756 757 758 759
        }
        if (     f->avctx->bits_per_raw_sample ==  9)
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
        else if (f->avctx->bits_per_raw_sample == 10)
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
        else if (f->avctx->bits_per_raw_sample == 12)
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
        else if (f->avctx->bits_per_raw_sample == 14)
            f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
        else
        if (f->transparency) f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
        else                 f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
    } else {
        av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
Luca Barbato's avatar
Luca Barbato committed
760
        return AVERROR(ENOSYS);
761
    }
762 763 764 765
    if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
        av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
        return AVERROR(ENOSYS);
    }
766

767
    ff_dlog(f->avctx, "%d %d %d\n",
768 769 770 771 772
            f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
    if (f->version < 2) {
        context_count = read_quant_tables(c, f->quant_table);
        if (context_count < 0) {
            av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
773
            return AVERROR_INVALIDDATA;
774 775 776 777 778
        }
    } else if (f->version < 3) {
        f->slice_count = get_symbol(c, state, 0);
    } else {
        const uint8_t *p = c->bytestream_end;
779 780 781
        for (f->slice_count = 0;
             f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;
             f->slice_count++) {
782 783 784 785 786 787 788 789 790
            int trailer = 3 + 5*!!f->ec;
            int size = AV_RB24(p-trailer);
            if (size + trailer > p - c->bytestream_start)
                break;
            p -= size + trailer;
        }
    }
    if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0) {
        av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->slice_count);
791
        return AVERROR_INVALIDDATA;
792 793 794 795
    }

    for (j = 0; j < f->slice_count; j++) {
        FFV1Context *fs = f->slice_context[j];
796
        fs->ac            = f->ac;
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
        fs->packed_at_lsb = f->packed_at_lsb;

        fs->slice_damaged = 0;

        if (f->version == 2) {
            fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
            fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
            fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
            fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;

            fs->slice_x     /= f->num_h_slices;
            fs->slice_y     /= f->num_v_slices;
            fs->slice_width  = fs->slice_width  / f->num_h_slices - fs->slice_x;
            fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
            if ((unsigned)fs->slice_width  > f->width ||
                (unsigned)fs->slice_height > f->height)
Luca Barbato's avatar
Luca Barbato committed
813
                return AVERROR_INVALIDDATA;
814 815
            if (   (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
                || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
Luca Barbato's avatar
Luca Barbato committed
816
                return AVERROR_INVALIDDATA;
817 818 819 820 821 822 823 824 825 826
        }

        for (i = 0; i < f->plane_count; i++) {
            PlaneContext *const p = &fs->plane[i];

            if (f->version == 2) {
                int idx = get_symbol(c, state, 0);
                if (idx > (unsigned)f->quant_table_count) {
                    av_log(f->avctx, AV_LOG_ERROR,
                           "quant_table_index out of range\n");
Luca Barbato's avatar
Luca Barbato committed
827
                    return AVERROR_INVALIDDATA;
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
                }
                p->quant_table_index = idx;
                memcpy(p->quant_table, f->quant_tables[idx],
                       sizeof(p->quant_table));
                context_count = f->context_count[idx];
            } else {
                memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
            }

            if (f->version <= 2) {
                av_assert0(context_count >= 0);
                if (p->context_count < context_count) {
                    av_freep(&p->state);
                    av_freep(&p->vlc_state);
                }
                p->context_count = context_count;
            }
        }
    }
    return 0;
}

static av_cold int decode_init(AVCodecContext *avctx)
{
    FFV1Context *f = avctx->priv_data;
Luca Barbato's avatar
Luca Barbato committed
853
    int ret;
854

855 856
    if ((ret = ffv1_common_init(avctx)) < 0)
        return ret;
857

Luca Barbato's avatar
Luca Barbato committed
858 859
    if (avctx->extradata && (ret = read_extra_header(f)) < 0)
        return ret;
860

Luca Barbato's avatar
Luca Barbato committed
861 862
    if ((ret = ffv1_init_slice_contexts(f)) < 0)
        return ret;
863

864 865
    avctx->internal->allocate_progress = 1;

866 867 868
    return 0;
}

869
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
870
{
871
    uint8_t *buf        = avpkt->data;
872 873 874
    int buf_size        = avpkt->size;
    FFV1Context *f      = avctx->priv_data;
    RangeCoder *const c = &f->slice_context[0]->c;
875
    int i, ret;
876
    uint8_t keystate = 128;
877
    uint8_t *buf_p;
878
    AVFrame *p;
879

880 881 882 883 884
    if (f->last_picture.f)
        ff_thread_release_buffer(avctx, &f->last_picture);
    FFSWAP(ThreadFrame, f->picture, f->last_picture);

    f->cur = p = f->picture.f;
885

886 887 888 889 890 891 892
    if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
        /* we have interlaced material flagged in container */
        p->interlaced_frame = 1;
        if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
            p->top_field_first = 1;
    }

893
    f->avctx = avctx;
894 895 896
    ff_init_range_decoder(c, buf, buf_size);
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

897
    p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
898
    if (get_rac(c, &keystate)) {
899
        p->key_frame    = 1;
900
        f->key_frame_ok = 0;
Luca Barbato's avatar
Luca Barbato committed
901 902
        if ((ret = read_header(f)) < 0)
            return ret;
903 904 905
        f->key_frame_ok = 1;
    } else {
        if (!f->key_frame_ok) {
906
            av_log(avctx, AV_LOG_ERROR,
Diego Biurrun's avatar
Diego Biurrun committed
907
                   "Cannot decode non-keyframe without valid keyframe\n");
908 909
            return AVERROR_INVALIDDATA;
        }
910
        p->key_frame = 0;
911 912
    }

913
    if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
Luca Barbato's avatar
Luca Barbato committed
914
        return ret;
915

916
    if (avctx->debug & FF_DEBUG_PICT_INFO)
917 918 919
        av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
               f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);

920 921
    ff_thread_finish_setup(avctx);

922 923 924 925 926 927
    buf_p = buf + buf_size;
    for (i = f->slice_count - 1; i >= 0; i--) {
        FFV1Context *fs = f->slice_context[i];
        int trailer = 3 + 5*!!f->ec;
        int v;

928 929
        if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
        else                     v = buf_p - c->bytestream_start;
930 931
        if (buf_p - c->bytestream_start < v) {
            av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
Luca Barbato's avatar
Luca Barbato committed
932
            return AVERROR_INVALIDDATA;
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954
        }
        buf_p -= v;

        if (f->ec) {
            unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
            if (crc) {
                int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
                av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);
                if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
                    av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
                } else if (ts != AV_NOPTS_VALUE) {
                    av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
                } else {
                    av_log(f->avctx, AV_LOG_ERROR, "\n");
                }
                fs->slice_damaged = 1;
            }
        }

        if (i) {
            ff_init_range_decoder(&fs->c, buf_p, v);
        } else
955
            fs->c.bytestream_end = buf_p + v;
956

957
        fs->avctx = avctx;
958
        fs->cur = p;
959 960
    }

961 962 963 964
    avctx->execute(avctx,
                   decode_slice,
                   &f->slice_context[0],
                   NULL,
965
                   f->slice_count,
966
                   sizeof(void*));
967

968 969
    for (i = f->slice_count - 1; i >= 0; i--) {
        FFV1Context *fs = f->slice_context[i];
970
        int j;
971
        if (fs->slice_damaged && f->last_picture.f->data[0]) {
972 973
            const uint8_t *src[4];
            uint8_t *dst[4];
974
            ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
975 976 977
            for (j = 0; j < 4; j++) {
                int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
                int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
978
                dst[j] = p->data[j] + p->linesize[j] *
979
                         (fs->slice_y >> sv) + (fs->slice_x >> sh);
980
                src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
981
                         (fs->slice_y >> sv) + (fs->slice_x >> sh);
982
            }
983
            av_image_copy(dst, p->linesize, src,
984
                          f->last_picture.f->linesize,
985 986
                          avctx->pix_fmt,
                          fs->slice_width,
987
                          fs->slice_height);
988 989
        }
    }
990
    ff_thread_report_progress(&f->picture, INT_MAX, 0);
991 992 993

    f->picture_number++;

994 995
    if (f->last_picture.f)
        ff_thread_release_buffer(avctx, &f->last_picture);
996
    f->cur = NULL;
997 998
    if ((ret = av_frame_ref(data, f->picture.f)) < 0)
        return ret;
999

1000
    *got_frame = 1;
1001 1002 1003 1004

    return buf_size;
}

1005 1006 1007
static int init_thread_copy(AVCodecContext *avctx)
{
    FFV1Context *f = avctx->priv_data;
1008
    int i, ret;
1009

1010 1011 1012 1013 1014
    f->picture.f      = NULL;
    f->last_picture.f = NULL;
    f->sample_buffer  = NULL;
    f->slice_count = 0;

1015 1016 1017 1018 1019 1020
    for (i = 0; i < f->quant_table_count; i++) {
        av_assert0(f->version > 1);
        f->initial_states[i] = av_memdup(f->initial_states[i],
                                         f->context_count[i] * sizeof(*f->initial_states[i]));
    }

1021 1022 1023 1024 1025 1026
    f->picture.f      = av_frame_alloc();
    f->last_picture.f = av_frame_alloc();

    if ((ret = ffv1_init_slice_contexts(f)) < 0)
        return ret;

1027 1028 1029
    return 0;
}

1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
{
    fsdst->version             = fsrc->version;
    fsdst->micro_version       = fsrc->micro_version;
    fsdst->chroma_planes       = fsrc->chroma_planes;
    fsdst->chroma_h_shift      = fsrc->chroma_h_shift;
    fsdst->chroma_v_shift      = fsrc->chroma_v_shift;
    fsdst->transparency        = fsrc->transparency;
    fsdst->plane_count         = fsrc->plane_count;
    fsdst->ac                  = fsrc->ac;
    fsdst->colorspace          = fsrc->colorspace;

    fsdst->ec                  = fsrc->ec;
    fsdst->intra               = fsrc->intra;
    fsdst->slice_damaged       = fssrc->slice_damaged;
    fsdst->key_frame_ok        = fsrc->key_frame_ok;

    fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
    fsdst->packed_at_lsb       = fsrc->packed_at_lsb;
    fsdst->slice_count         = fsrc->slice_count;
    if (fsrc->version<3){
        fsdst->slice_x             = fssrc->slice_x;
        fsdst->slice_y             = fssrc->slice_y;
        fsdst->slice_width         = fssrc->slice_width;
        fsdst->slice_height        = fssrc->slice_height;
    }
}

1058 1059 1060 1061 1062 1063 1064 1065 1066
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
    FFV1Context *fsrc = src->priv_data;
    FFV1Context *fdst = dst->priv_data;
    int i, ret;

    if (dst == src)
        return 0;

1067
    {
1068 1069 1070 1071 1072 1073
        ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
        uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
        struct FFV1Context *slice_context[MAX_SLICES];
        memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
        memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));

1074
        memcpy(fdst, fsrc, sizeof(*fdst));
1075 1076 1077 1078
        memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
        memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));
        fdst->picture      = picture;
        fdst->last_picture = last_picture;
1079 1080 1081 1082 1083 1084 1085
        for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
            FFV1Context *fssrc = fsrc->slice_context[i];
            FFV1Context *fsdst = fdst->slice_context[i];
            copy_fields(fsdst, fssrc, fsrc);
        }
        av_assert0(!fdst->plane[0].state);
        av_assert0(!fdst->sample_buffer);
1086 1087
    }

1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
    av_assert1(fdst->slice_count == fsrc->slice_count);


    ff_thread_release_buffer(dst, &fdst->picture);
    if (fsrc->picture.f->data[0]) {
        if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
            return ret;
    }

    fdst->fsrc = fsrc;

1099 1100 1101
    return 0;
}

1102 1103
AVCodec ff_ffv1_decoder = {
    .name           = "ffv1",
1104
    .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1105 1106 1107 1108
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_FFV1,
    .priv_data_size = sizeof(FFV1Context),
    .init           = decode_init,
1109
    .close          = ffv1_close,
1110
    .decode         = decode_frame,
1111 1112
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
    .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1113
    .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |
1114
                      CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS,
1115
};