LCOV - code coverage report
Current view: top level - libavcodec - ffv1dec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 370 678 54.6 %
Date: 2018-05-20 11:54:08 Functions: 13 16 81.2 %

          Line data    Source code
       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   649743252 :         while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
      52   505833082 :             e++;
      53   505833082 :             if (e > 31)
      54           0 :                 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   415081654 :     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     1558692 : static int is_input_end(FFV1Context *s)
      97             : {
      98     1558692 :     if (s->ac != AC_GOLOMB_RICE) {
      99      824364 :         RangeCoder *const c = &s->c;
     100      824364 :         if (c->overread > MAX_OVERREAD)
     101           0 :             return AVERROR_INVALIDDATA;
     102             :     } else {
     103      734328 :         if (get_bits_left(&s->gb) < 1)
     104           0 :             return AVERROR_INVALIDDATA;
     105             :     }
     106     1558692 :     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           0 :                 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           0 :                 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           0 :                 for (x = 0; x < w; x++) {
     158           0 :                     ((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           0 :         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           0 :         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           0 :             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
     196           0 :             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           0 :         f->cur->interlaced_frame = 1;
     212           0 :         f->cur->top_field_first  = 1;
     213        4900 :     } else if (ps == 2) {
     214           0 :         f->cur->interlaced_frame = 1;
     215           0 :         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           0 :         av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
     225           0 :                f->cur->sample_aspect_ratio.num,
     226           0 :                f->cur->sample_aspect_ratio.den);
     227           0 :         f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
     228             :     }
     229             : 
     230        4900 :     if (fs->version > 3) {
     231           0 :         fs->slice_reset_contexts = get_rac(c, state);
     232           0 :         fs->slice_coding_mode = get_symbol(c, state, 0);
     233           0 :         if (fs->slice_coding_mode != 1) {
     234           0 :             fs->slice_rct_by_coef = get_symbol(c, state, 0);
     235           0 :             fs->slice_rct_ry_coef = get_symbol(c, state, 0);
     236           0 :             if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
     237           0 :                 av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
     238           0 :                 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        5104 :     for( si=0; fs != f->slice_context[si]; si ++)
     256             :         ;
     257             : 
     258        5104 :     if(f->fsrc && !p->key_frame)
     259           0 :         ff_thread_await_progress(&f->last_picture, si, 0);
     260             : 
     261        5104 :     if(f->fsrc && !p->key_frame) {
     262           0 :         FFV1Context *fssrc = f->fsrc->slice_context[si];
     263           0 :         FFV1Context *fsdst = f->slice_context[si];
     264             :         av_assert1(fsdst->plane_count == fssrc->plane_count);
     265             :         av_assert1(fsdst == fs);
     266             : 
     267           0 :         if (!p->key_frame)
     268           0 :             fsdst->slice_damaged |= fssrc->slice_damaged;
     269             : 
     270           0 :         for (i = 0; i < f->plane_count; i++) {
     271           0 :             PlaneContext *psrc = &fssrc->plane[i];
     272           0 :             PlaneContext *pdst = &fsdst->plane[i];
     273             : 
     274           0 :             av_free(pdst->state);
     275           0 :             av_free(pdst->vlc_state);
     276           0 :             memcpy(pdst, psrc, sizeof(*pdst));
     277           0 :             pdst->state = NULL;
     278           0 :             pdst->vlc_state = NULL;
     279             : 
     280           0 :             if (fssrc->ac) {
     281           0 :                 pdst->state = av_malloc_array(CONTEXT_SIZE,  psrc->context_count);
     282           0 :                 memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
     283             :             } else {
     284           0 :                 pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
     285           0 :                 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           0 :             return AVERROR(ENOMEM);
     296        4900 :         if (decode_slice_header(f, fs) < 0) {
     297           0 :             fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
     298           0 :             fs->slice_damaged = 1;
     299           0 :             return AVERROR_INVALIDDATA;
     300             :         }
     301             :     }
     302        5104 :     if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
     303           0 :         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        5312 :         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           0 :             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           0 :          decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0]    , width, height, p->linesize[0], 0, 2);
     337           0 :          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        3264 :         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        3264 :         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           0 :             av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
     357           0 :             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           0 :             return AVERROR_INVALIDDATA;
     381             : 
     382       82818 :         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           0 :             return ret;
     405         610 :         context_count *= ret;
     406         610 :         if (context_count > 32768U) {
     407           0 :             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           0 :         av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
     430           0 :         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           0 :             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           0 :         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           0 :         return AVERROR_INVALIDDATA;
     459             :     }
     460             : 
     461          98 :     if (f->num_h_slices > (unsigned)f->width  || !f->num_h_slices ||
     462          98 :         f->num_v_slices > (unsigned)f->height || !f->num_v_slices
     463             :        ) {
     464           0 :         av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
     465           0 :         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           0 :         av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
     471           0 :         f->quant_table_count = 0;
     472           0 :         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           0 :             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
     479           0 :             return AVERROR_INVALIDDATA;
     480             :         }
     481             :     }
     482          49 :     if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
     483           0 :         return ret;
     484             : 
     485         147 :     for (i = 0; i < f->quant_table_count; i++)
     486          98 :         if (get_rac(c, state)) {
     487           0 :             for (j = 0; j < f->context_count[i]; j++)
     488           0 :                 for (k = 0; k < CONTEXT_SIZE; k++) {
     489           0 :                     int pred = j ? f->initial_states[i][j - 1][k] : 128;
     490           0 :                     f->initial_states[i][j][k] =
     491           0 :                         (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          98 :                    f->avctx->extradata, f->avctx->extradata_size);
     505          49 :         if (v || f->avctx->extradata_size < 4) {
     506           0 :             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
     507           0 :             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           0 :         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           0 :                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           0 :             av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
     543           0 :             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           0 :             for (i = 1; i < 256; i++)
     550           0 :                 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
     551             :         }
     552             : 
     553          24 :         colorspace          = get_symbol(c, state, 0); //YUV cs type
     554          24 :         bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
     555          24 :         chroma_planes       = get_rac(c, state);
     556          24 :         chroma_h_shift      = get_symbol(c, state, 0);
     557          24 :         chroma_v_shift      = get_symbol(c, state, 0);
     558          24 :         transparency        = get_rac(c, state);
     559          24 :         if (colorspace == 0 && f->avctx->skip_alpha)
     560           0 :             transparency = 0;
     561             : 
     562          24 :         if (f->plane_count) {
     563          32 :             if (colorspace          != f->colorspace                 ||
     564          32 :                 bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
     565          32 :                 chroma_planes       != f->chroma_planes              ||
     566          32 :                 chroma_h_shift      != f->chroma_h_shift             ||
     567          32 :                 chroma_v_shift      != f->chroma_v_shift             ||
     568          16 :                 transparency        != f->transparency) {
     569           0 :                 av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
     570           0 :                 return AVERROR_INVALIDDATA;
     571             :             }
     572             :         }
     573             : 
     574          24 :         if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
     575           0 :             av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
     576             :                    chroma_h_shift, chroma_v_shift);
     577           0 :             return AVERROR_INVALIDDATA;
     578             :         }
     579             : 
     580          24 :         f->colorspace                 = colorspace;
     581          24 :         f->avctx->bits_per_raw_sample = bits_per_raw_sample;
     582          24 :         f->chroma_planes              = chroma_planes;
     583          24 :         f->chroma_h_shift             = chroma_h_shift;
     584          24 :         f->chroma_v_shift             = chroma_v_shift;
     585          24 :         f->transparency               = transparency;
     586             : 
     587          24 :         f->plane_count    = 2 + f->transparency;
     588             :     }
     589             : 
     590         169 :     if (f->colorspace == 0) {
     591         121 :         if (!f->transparency && !f->chroma_planes) {
     592           0 :             if (f->avctx->bits_per_raw_sample <= 8)
     593           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
     594           0 :             else if (f->avctx->bits_per_raw_sample == 9) {
     595           0 :                 f->packed_at_lsb = 1;
     596           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY9;
     597           0 :             } else if (f->avctx->bits_per_raw_sample == 10) {
     598           0 :                 f->packed_at_lsb = 1;
     599           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
     600           0 :             } else if (f->avctx->bits_per_raw_sample == 12) {
     601           0 :                 f->packed_at_lsb = 1;
     602           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
     603           0 :             } else if (f->avctx->bits_per_raw_sample == 16) {
     604           0 :                 f->packed_at_lsb = 1;
     605           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
     606           0 :             } else if (f->avctx->bits_per_raw_sample < 16) {
     607           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
     608             :             } else
     609           0 :                 return AVERROR(ENOSYS);
     610         121 :         } else if (f->transparency && !f->chroma_planes) {
     611           0 :             if (f->avctx->bits_per_raw_sample <= 8)
     612           0 :                 f->avctx->pix_fmt = AV_PIX_FMT_YA8;
     613             :             else
     614           0 :                 return AVERROR(ENOSYS);
     615         121 :         } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
     616          73 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     617           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
     618           0 :             case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
     619           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
     620          73 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
     621           0 :             case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
     622           0 :             case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
     623             :             }
     624          73 :         } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
     625           0 :             switch(16*f->chroma_h_shift + f->chroma_v_shift) {
     626           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
     627           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
     628           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
     629             :             }
     630           0 :         } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
     631           0 :             f->packed_at_lsb = 1;
     632           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     633           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
     634           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
     635           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
     636             :             }
     637           0 :         } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
     638           0 :             f->packed_at_lsb = 1;
     639           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     640           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
     641           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
     642           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
     643             :             }
     644           0 :         } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
     645          24 :             f->packed_at_lsb = 1;
     646          24 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     647           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
     648           0 :             case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P10; break;
     649          24 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
     650           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
     651             :             }
     652          24 :         } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
     653           0 :             f->packed_at_lsb = 1;
     654           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     655           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
     656           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
     657           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
     658             :             }
     659           0 :         } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
     660           0 :             f->packed_at_lsb = 1;
     661           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     662           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
     663           0 :             case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P12; break;
     664           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
     665           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
     666             :             }
     667           0 :         } else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
     668           0 :             f->packed_at_lsb = 1;
     669           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     670           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P14; break;
     671           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P14; break;
     672           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P14; break;
     673             :             }
     674           0 :         } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
     675          24 :             f->packed_at_lsb = 1;
     676          24 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     677          24 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
     678           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
     679           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
     680             :             }
     681          24 :         } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
     682           0 :             f->packed_at_lsb = 1;
     683           0 :             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
     684           0 :             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
     685           0 :             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
     686           0 :             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
     687             :             }
     688             :         }
     689          48 :     } else if (f->colorspace == 1) {
     690          48 :         if (f->chroma_h_shift || f->chroma_v_shift) {
     691           0 :             av_log(f->avctx, AV_LOG_ERROR,
     692             :                    "chroma subsampling not supported in this colorspace\n");
     693           0 :             return AVERROR(ENOSYS);
     694             :         }
     695          48 :         if (     f->avctx->bits_per_raw_sample <=  8 && !f->transparency)
     696          24 :             f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
     697          24 :         else if (f->avctx->bits_per_raw_sample <=  8 && f->transparency)
     698           0 :             f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
     699          24 :         else if (f->avctx->bits_per_raw_sample ==  9 && !f->transparency)
     700           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
     701          24 :         else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
     702           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
     703          24 :         else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
     704           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
     705          24 :         else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
     706           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
     707          24 :         else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
     708           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
     709          24 :         else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
     710           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
     711          24 :         else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
     712          24 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
     713          24 :             f->use32bit = 1;
     714             :         }
     715           0 :         else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
     716           0 :             f->avctx->pix_fmt = AV_PIX_FMT_GBRAP16;
     717           0 :             f->use32bit = 1;
     718             :         }
     719             :     } else {
     720           0 :         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
     721           0 :         return AVERROR(ENOSYS);
     722             :     }
     723         169 :     if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
     724           0 :         av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
     725           0 :         return AVERROR(ENOSYS);
     726             :     }
     727             : 
     728             :     ff_dlog(f->avctx, "%d %d %d\n",
     729             :             f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
     730         169 :     if (f->version < 2) {
     731          24 :         context_count = read_quant_tables(c, f->quant_table);
     732          24 :         if (context_count < 0) {
     733           0 :             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
     734           0 :             return AVERROR_INVALIDDATA;
     735             :         }
     736          24 :         f->slice_count = f->max_slice_count;
     737         145 :     } else if (f->version < 3) {
     738           0 :         f->slice_count = get_symbol(c, state, 0);
     739             :     } else {
     740         145 :         const uint8_t *p = c->bytestream_end;
     741         870 :         for (f->slice_count = 0;
     742        1450 :              f->slice_count < MAX_SLICES && 3 + 5*!!f->ec < p - c->bytestream_start;
     743         580 :              f->slice_count++) {
     744         580 :             int trailer = 3 + 5*!!f->ec;
     745         580 :             int size = AV_RB24(p-trailer);
     746         580 :             if (size + trailer > p - c->bytestream_start)
     747           0 :                 break;
     748         580 :             p -= size + trailer;
     749             :         }
     750             :     }
     751         169 :     if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
     752           0 :         av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
     753           0 :         return AVERROR_INVALIDDATA;
     754             :     }
     755             : 
     756         773 :     for (j = 0; j < f->slice_count; j++) {
     757         604 :         FFV1Context *fs = f->slice_context[j];
     758         604 :         fs->ac            = f->ac;
     759         604 :         fs->packed_at_lsb = f->packed_at_lsb;
     760             : 
     761         604 :         fs->slice_damaged = 0;
     762             : 
     763         604 :         if (f->version == 2) {
     764           0 :             fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;
     765           0 :             fs->slice_y      =  get_symbol(c, state, 0)      * f->height;
     766           0 :             fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;
     767           0 :             fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
     768             : 
     769           0 :             fs->slice_x     /= f->num_h_slices;
     770           0 :             fs->slice_y     /= f->num_v_slices;
     771           0 :             fs->slice_width  = fs->slice_width  / f->num_h_slices - fs->slice_x;
     772           0 :             fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
     773           0 :             if ((unsigned)fs->slice_width  > f->width ||
     774           0 :                 (unsigned)fs->slice_height > f->height)
     775           0 :                 return AVERROR_INVALIDDATA;
     776           0 :             if (   (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width
     777           0 :                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
     778           0 :                 return AVERROR_INVALIDDATA;
     779             :         }
     780             : 
     781        1812 :         for (i = 0; i < f->plane_count; i++) {
     782        1208 :             PlaneContext *const p = &fs->plane[i];
     783             : 
     784        1208 :             if (f->version == 2) {
     785           0 :                 int idx = get_symbol(c, state, 0);
     786           0 :                 if (idx > (unsigned)f->quant_table_count) {
     787           0 :                     av_log(f->avctx, AV_LOG_ERROR,
     788             :                            "quant_table_index out of range\n");
     789           0 :                     return AVERROR_INVALIDDATA;
     790             :                 }
     791           0 :                 p->quant_table_index = idx;
     792           0 :                 memcpy(p->quant_table, f->quant_tables[idx],
     793             :                        sizeof(p->quant_table));
     794           0 :                 context_count = f->context_count[idx];
     795             :             } else {
     796        1208 :                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
     797             :             }
     798             : 
     799        1208 :             if (f->version <= 2) {
     800          48 :                 av_assert0(context_count >= 0);
     801          48 :                 if (p->context_count < context_count) {
     802          16 :                     av_freep(&p->state);
     803          16 :                     av_freep(&p->vlc_state);
     804             :                 }
     805          48 :                 p->context_count = context_count;
     806             :             }
     807             :         }
     808             :     }
     809         169 :     return 0;
     810             : }
     811             : 
     812          57 : static av_cold int decode_init(AVCodecContext *avctx)
     813             : {
     814          57 :     FFV1Context *f = avctx->priv_data;
     815             :     int ret;
     816             : 
     817          57 :     if ((ret = ff_ffv1_common_init(avctx)) < 0)
     818           0 :         return ret;
     819             : 
     820          57 :     if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
     821           0 :         return ret;
     822             : 
     823          57 :     if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
     824           0 :         return ret;
     825             : 
     826          57 :     avctx->internal->allocate_progress = 1;
     827             : 
     828          57 :     return 0;
     829             : }
     830             : 
     831        1429 : static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
     832             : {
     833        1429 :     uint8_t *buf        = avpkt->data;
     834        1429 :     int buf_size        = avpkt->size;
     835        1429 :     FFV1Context *f      = avctx->priv_data;
     836        1429 :     RangeCoder *const c = &f->slice_context[0]->c;
     837             :     int i, ret;
     838        1429 :     uint8_t keystate = 128;
     839             :     uint8_t *buf_p;
     840             :     AVFrame *p;
     841             : 
     842        1429 :     if (f->last_picture.f)
     843        1429 :         ff_thread_release_buffer(avctx, &f->last_picture);
     844        1429 :     FFSWAP(ThreadFrame, f->picture, f->last_picture);
     845             : 
     846        1429 :     f->cur = p = f->picture.f;
     847             : 
     848        1429 :     if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
     849             :         /* we have interlaced material flagged in container */
     850           0 :         p->interlaced_frame = 1;
     851           0 :         if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
     852           0 :             p->top_field_first = 1;
     853             :     }
     854             : 
     855        1429 :     f->avctx = avctx;
     856        1429 :     ff_init_range_decoder(c, buf, buf_size);
     857        1429 :     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
     858             : 
     859        1429 :     p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
     860        1429 :     if (get_rac(c, &keystate)) {
     861         169 :         p->key_frame    = 1;
     862         169 :         f->key_frame_ok = 0;
     863         169 :         if ((ret = read_header(f)) < 0)
     864           0 :             return ret;
     865         169 :         f->key_frame_ok = 1;
     866             :     } else {
     867        1260 :         if (!f->key_frame_ok) {
     868           0 :             av_log(avctx, AV_LOG_ERROR,
     869             :                    "Cannot decode non-keyframe without valid keyframe\n");
     870           0 :             return AVERROR_INVALIDDATA;
     871             :         }
     872        1260 :         p->key_frame = 0;
     873             :     }
     874             : 
     875        1429 :     if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
     876           0 :         return ret;
     877             : 
     878        1429 :     if (avctx->debug & FF_DEBUG_PICT_INFO)
     879           0 :         av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
     880           0 :                f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
     881             : 
     882        1429 :     ff_thread_finish_setup(avctx);
     883             : 
     884        1429 :     buf_p = buf + buf_size;
     885        6533 :     for (i = f->slice_count - 1; i >= 0; i--) {
     886        5104 :         FFV1Context *fs = f->slice_context[i];
     887        5104 :         int trailer = 3 + 5*!!f->ec;
     888             :         int v;
     889             : 
     890        5104 :         if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
     891         204 :         else                     v = buf_p - c->bytestream_start;
     892        5104 :         if (buf_p - c->bytestream_start < v) {
     893           0 :             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
     894           0 :             ff_thread_report_progress(&f->picture, INT_MAX, 0);
     895           0 :             return AVERROR_INVALIDDATA;
     896             :         }
     897        5104 :         buf_p -= v;
     898             : 
     899        5104 :         if (f->ec) {
     900        4900 :             unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
     901        4900 :             if (crc) {
     902           0 :                 int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
     903           0 :                 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);
     904           0 :                 if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
     905           0 :                     av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
     906           0 :                 } else if (ts != AV_NOPTS_VALUE) {
     907           0 :                     av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
     908             :                 } else {
     909           0 :                     av_log(f->avctx, AV_LOG_ERROR, "\n");
     910             :                 }
     911           0 :                 fs->slice_damaged = 1;
     912             :             }
     913        4900 :             if (avctx->debug & FF_DEBUG_PICT_INFO) {
     914           0 :                 av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
     915             :             }
     916             :         }
     917             : 
     918        5104 :         if (i) {
     919        3675 :             ff_init_range_decoder(&fs->c, buf_p, v);
     920             :         } else
     921        1429 :             fs->c.bytestream_end = buf_p + v;
     922             : 
     923        5104 :         fs->avctx = avctx;
     924        5104 :         fs->cur = p;
     925             :     }
     926             : 
     927        2858 :     avctx->execute(avctx,
     928             :                    decode_slice,
     929        1429 :                    &f->slice_context[0],
     930             :                    NULL,
     931             :                    f->slice_count,
     932             :                    sizeof(void*));
     933             : 
     934        6533 :     for (i = f->slice_count - 1; i >= 0; i--) {
     935        5104 :         FFV1Context *fs = f->slice_context[i];
     936             :         int j;
     937        5104 :         if (fs->slice_damaged && f->last_picture.f->data[0]) {
     938           0 :             const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
     939             :             const uint8_t *src[4];
     940             :             uint8_t *dst[4];
     941           0 :             ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
     942           0 :             for (j = 0; j < desc->nb_components; j++) {
     943           0 :                 int pixshift = desc->comp[j].depth > 8;
     944           0 :                 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
     945           0 :                 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
     946           0 :                 dst[j] = p->data[j] + p->linesize[j] *
     947           0 :                          (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
     948           0 :                 src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
     949           0 :                          (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
     950             : 
     951             :             }
     952           0 :             if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
     953           0 :                 desc->flags & FF_PSEUDOPAL) {
     954           0 :                 dst[1] = p->data[1];
     955           0 :                 src[1] = f->last_picture.f->data[1];
     956             :             }
     957           0 :             av_image_copy(dst, p->linesize, src,
     958           0 :                           f->last_picture.f->linesize,
     959             :                           avctx->pix_fmt,
     960             :                           fs->slice_width,
     961             :                           fs->slice_height);
     962             :         }
     963             :     }
     964        1429 :     ff_thread_report_progress(&f->picture, INT_MAX, 0);
     965             : 
     966        1429 :     f->picture_number++;
     967             : 
     968        1429 :     if (f->last_picture.f)
     969        1429 :         ff_thread_release_buffer(avctx, &f->last_picture);
     970        1429 :     f->cur = NULL;
     971        1429 :     if ((ret = av_frame_ref(data, f->picture.f)) < 0)
     972           0 :         return ret;
     973             : 
     974        1429 :     *got_frame = 1;
     975             : 
     976        1429 :     return buf_size;
     977             : }
     978             : 
     979             : #if HAVE_THREADS
     980           0 : static int init_thread_copy(AVCodecContext *avctx)
     981             : {
     982           0 :     FFV1Context *f = avctx->priv_data;
     983             :     int i, ret;
     984             : 
     985           0 :     f->picture.f      = NULL;
     986           0 :     f->last_picture.f = NULL;
     987           0 :     f->sample_buffer  = NULL;
     988           0 :     f->max_slice_count = 0;
     989           0 :     f->slice_count = 0;
     990             : 
     991           0 :     for (i = 0; i < f->quant_table_count; i++) {
     992           0 :         av_assert0(f->version > 1);
     993           0 :         f->initial_states[i] = av_memdup(f->initial_states[i],
     994           0 :                                          f->context_count[i] * sizeof(*f->initial_states[i]));
     995             :     }
     996             : 
     997           0 :     f->picture.f      = av_frame_alloc();
     998           0 :     f->last_picture.f = av_frame_alloc();
     999             : 
    1000           0 :     if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
    1001           0 :         return ret;
    1002             : 
    1003           0 :     return 0;
    1004             : }
    1005             : #endif
    1006             : 
    1007           0 : static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
    1008             : {
    1009           0 :     fsdst->version             = fsrc->version;
    1010           0 :     fsdst->micro_version       = fsrc->micro_version;
    1011           0 :     fsdst->chroma_planes       = fsrc->chroma_planes;
    1012           0 :     fsdst->chroma_h_shift      = fsrc->chroma_h_shift;
    1013           0 :     fsdst->chroma_v_shift      = fsrc->chroma_v_shift;
    1014           0 :     fsdst->transparency        = fsrc->transparency;
    1015           0 :     fsdst->plane_count         = fsrc->plane_count;
    1016           0 :     fsdst->ac                  = fsrc->ac;
    1017           0 :     fsdst->colorspace          = fsrc->colorspace;
    1018             : 
    1019           0 :     fsdst->ec                  = fsrc->ec;
    1020           0 :     fsdst->intra               = fsrc->intra;
    1021           0 :     fsdst->slice_damaged       = fssrc->slice_damaged;
    1022           0 :     fsdst->key_frame_ok        = fsrc->key_frame_ok;
    1023             : 
    1024           0 :     fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
    1025           0 :     fsdst->packed_at_lsb       = fsrc->packed_at_lsb;
    1026           0 :     fsdst->slice_count         = fsrc->slice_count;
    1027           0 :     if (fsrc->version<3){
    1028           0 :         fsdst->slice_x             = fssrc->slice_x;
    1029           0 :         fsdst->slice_y             = fssrc->slice_y;
    1030           0 :         fsdst->slice_width         = fssrc->slice_width;
    1031           0 :         fsdst->slice_height        = fssrc->slice_height;
    1032             :     }
    1033           0 : }
    1034             : 
    1035             : #if HAVE_THREADS
    1036           0 : static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
    1037             : {
    1038           0 :     FFV1Context *fsrc = src->priv_data;
    1039           0 :     FFV1Context *fdst = dst->priv_data;
    1040             :     int i, ret;
    1041             : 
    1042           0 :     if (dst == src)
    1043           0 :         return 0;
    1044             : 
    1045             :     {
    1046           0 :         ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
    1047             :         uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
    1048             :         struct FFV1Context *slice_context[MAX_SLICES];
    1049           0 :         memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
    1050           0 :         memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));
    1051             : 
    1052           0 :         memcpy(fdst, fsrc, sizeof(*fdst));
    1053           0 :         memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
    1054           0 :         memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));
    1055           0 :         fdst->picture      = picture;
    1056           0 :         fdst->last_picture = last_picture;
    1057           0 :         for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
    1058           0 :             FFV1Context *fssrc = fsrc->slice_context[i];
    1059           0 :             FFV1Context *fsdst = fdst->slice_context[i];
    1060           0 :             copy_fields(fsdst, fssrc, fsrc);
    1061             :         }
    1062           0 :         av_assert0(!fdst->plane[0].state);
    1063           0 :         av_assert0(!fdst->sample_buffer);
    1064             :     }
    1065             : 
    1066             :     av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
    1067             : 
    1068             : 
    1069           0 :     ff_thread_release_buffer(dst, &fdst->picture);
    1070           0 :     if (fsrc->picture.f->data[0]) {
    1071           0 :         if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
    1072           0 :             return ret;
    1073             :     }
    1074             : 
    1075           0 :     fdst->fsrc = fsrc;
    1076             : 
    1077           0 :     return 0;
    1078             : }
    1079             : #endif
    1080             : 
    1081             : AVCodec ff_ffv1_decoder = {
    1082             :     .name           = "ffv1",
    1083             :     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
    1084             :     .type           = AVMEDIA_TYPE_VIDEO,
    1085             :     .id             = AV_CODEC_ID_FFV1,
    1086             :     .priv_data_size = sizeof(FFV1Context),
    1087             :     .init           = decode_init,
    1088             :     .close          = ff_ffv1_close,
    1089             :     .decode         = decode_frame,
    1090             :     .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
    1091             :     .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
    1092             :     .capabilities   = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
    1093             :                       AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
    1094             :     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP
    1095             : };

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