LCOV - code coverage report
Current view: top level - libavcodec - huffyuvdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 376 737 51.0 %
Date: 2017-12-17 04:34:43 Functions: 14 17 82.4 %

          Line data    Source code
       1             : /*
       2             :  * huffyuv decoder
       3             :  *
       4             :  * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
       5             :  *
       6             :  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
       7             :  * the algorithm used
       8             :  *
       9             :  * This file is part of FFmpeg.
      10             :  *
      11             :  * FFmpeg is free software; you can redistribute it and/or
      12             :  * modify it under the terms of the GNU Lesser General Public
      13             :  * License as published by the Free Software Foundation; either
      14             :  * version 2.1 of the License, or (at your option) any later version.
      15             :  *
      16             :  * FFmpeg is distributed in the hope that it will be useful,
      17             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      18             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      19             :  * Lesser General Public License for more details.
      20             :  *
      21             :  * You should have received a copy of the GNU Lesser General Public
      22             :  * License along with FFmpeg; if not, write to the Free Software
      23             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      24             :  *
      25             :  * yuva, gray, 4:4:4, 4:1:1, 4:1:0 and >8 bit per sample support sponsored by NOA
      26             :  */
      27             : 
      28             : /**
      29             :  * @file
      30             :  * huffyuv decoder
      31             :  */
      32             : 
      33             : #define UNCHECKED_BITSTREAM_READER 1
      34             : 
      35             : #include "avcodec.h"
      36             : #include "get_bits.h"
      37             : #include "huffyuv.h"
      38             : #include "huffyuvdsp.h"
      39             : #include "lossless_videodsp.h"
      40             : #include "thread.h"
      41             : #include "libavutil/imgutils.h"
      42             : #include "libavutil/pixdesc.h"
      43             : 
      44             : #define classic_shift_luma_table_size 42
      45             : static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
      46             :     34, 36, 35, 69, 135, 232,   9, 16, 10, 24,  11,  23,  12,  16, 13, 10,
      47             :     14,  8, 15,  8,  16,   8,  17, 20, 16, 10, 207, 206, 205, 236, 11,  8,
      48             :     10, 21,  9, 23,   8,   8, 199, 70, 69, 68,   0,
      49             :   0,0,0,0,0,0,0,0,
      50             : };
      51             : 
      52             : #define classic_shift_chroma_table_size 59
      53             : static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
      54             :     66, 36,  37,  38, 39, 40,  41,  75,  76,  77, 110, 239, 144, 81, 82,  83,
      55             :     84, 85, 118, 183, 56, 57,  88,  89,  56,  89, 154,  57,  58, 57, 26, 141,
      56             :     57, 56,  58,  57, 58, 57, 184, 119, 214, 245, 116,  83,  82, 49, 80,  79,
      57             :     78, 77,  44,  75, 41, 40,  39,  38,  37,  36,  34,  0,
      58             :   0,0,0,0,0,0,0,0,
      59             : };
      60             : 
      61             : static const unsigned char classic_add_luma[256] = {
      62             :      3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
      63             :     73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
      64             :     68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
      65             :     35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
      66             :     37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
      67             :     35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
      68             :     27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
      69             :     15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
      70             :     12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,
      71             :     12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
      72             :     18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
      73             :     28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
      74             :     28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
      75             :     62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
      76             :     54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
      77             :     46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,
      78             : };
      79             : 
      80             : static const unsigned char classic_add_chroma[256] = {
      81             :      3,    1,   2,   2,   2,   2,   3,   3,   7,   5,   7,   5,   8,   6,  11,   9,
      82             :      7,   13,  11,  10,   9,   8,   7,   5,   9,   7,   6,   4,   7,   5,   8,   7,
      83             :      11,   8,  13,  11,  19,  15,  22,  23,  20,  33,  32,  28,  27,  29,  51,  77,
      84             :      43,  45,  76,  81,  46,  82,  75,  55,  56, 144,  58,  80,  60,  74, 147,  63,
      85             :     143,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,  75,  76,  77,  78,  79,
      86             :      80,  81,  82,  83,  84,  85,  86,  87,  88,  89,  90,  91,  27,  30,  21,  22,
      87             :      17,  14,   5,   6, 100,  54,  47,  50,  51,  53, 106, 107, 108, 109, 110, 111,
      88             :     112, 113, 114, 115,   4, 117, 118,  92,  94, 121, 122,   3, 124, 103,   2,   1,
      89             :       0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
      90             :     135, 132, 133, 104,  64, 101,  62,  57, 102,  95,  93,  59,  61,  28,  97,  96,
      91             :      52,  49,  48,  29,  32,  25,  24,  46,  23,  98,  45,  44,  43,  20,  42,  41,
      92             :      19,  18,  99,  40,  15,  39,  38,  16,  13,  12,  11,  37,  10,   9,   8,  36,
      93             :       7, 128, 127, 105, 123, 116,  35,  34,  33, 145,  31,  79,  42, 146,  78,  26,
      94             :      83,  48,  49,  50,  44,  47,  26,  31,  30,  18,  17,  19,  21,  24,  25,  13,
      95             :      14,  16,  17,  18,  20,  21,  12,  14,  15,   9,  10,   6,   9,   6,   5,   8,
      96             :       6,  12,   8,  10,   7,   9,   6,   4,   6,   2,   2,   3,   3,   3,   3,   2,
      97             : };
      98             : 
      99         207 : static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
     100             : {
     101             :     int i, val, repeat;
     102             : 
     103        8541 :     for (i = 0; i < n;) {
     104        8127 :         repeat = get_bits(gb, 3);
     105        8127 :         val    = get_bits(gb, 5);
     106        8127 :         if (repeat == 0)
     107        4623 :             repeat = get_bits(gb, 8);
     108        8127 :         if (i + repeat > n || get_bits_left(gb) < 0) {
     109           0 :             av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
     110           0 :             return AVERROR_INVALIDDATA;
     111             :         }
     112      566910 :         while (repeat--)
     113      550656 :             dst[i++] = val;
     114             :     }
     115         207 :     return 0;
     116             : }
     117             : 
     118          69 : static int generate_joint_tables(HYuvContext *s)
     119             : {
     120             :     int ret;
     121          69 :     uint16_t *symbols = av_mallocz(5 << VLC_BITS);
     122             :     uint16_t *bits;
     123             :     uint8_t *len;
     124          69 :     if (!symbols)
     125           0 :         return AVERROR(ENOMEM);
     126          69 :     bits = symbols + (1 << VLC_BITS);
     127          69 :     len = (uint8_t *)(bits + (1 << VLC_BITS));
     128             : 
     129         122 :     if (s->bitstream_bpp < 24 || s->version > 2) {
     130             :         int p, i, y, u;
     131         265 :         for (p = 0; p < 4; p++) {
     132         212 :             int p0 = s->version > 2 ? p : 0;
     133      718036 :             for (i = y = 0; y < s->vlc_n; y++) {
     134      717824 :                 int len0  = s->len[p0][y];
     135      717824 :                 int limit = VLC_BITS - len0;
     136      717824 :                 if (limit <= 0 || !len0)
     137      706148 :                     continue;
     138       11676 :                 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
     139           0 :                     continue;
     140    34961820 :                 for (u = 0; u < s->vlc_n; u++) {
     141    34950144 :                     int len1 = s->len[p][u];
     142    34950144 :                     if (len1 > limit || !len1)
     143    34890969 :                         continue;
     144       59175 :                     if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
     145           0 :                         continue;
     146       59175 :                     av_assert0(i < (1 << VLC_BITS));
     147       59175 :                     len[i]     = len0 + len1;
     148       59175 :                     bits[i]    = (s->bits[p0][y] << len1) + s->bits[p][u];
     149       59175 :                     symbols[i] = (y << 8) + (u & 0xFF);
     150       59175 :                         i++;
     151             :                 }
     152             :             }
     153         212 :             ff_free_vlc(&s->vlc[4 + p]);
     154         212 :             if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
     155             :                                           bits, 2, 2, symbols, 2, 2, 0)) < 0)
     156           0 :                 goto out;
     157             :         }
     158             :     } else {
     159          16 :         uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
     160             :         int i, b, g, r, code;
     161          16 :         int p0 = s->decorrelate;
     162          16 :         int p1 = !s->decorrelate;
     163             :         /* Restrict the range to +/-16 because that's pretty much guaranteed
     164             :          * to cover all the combinations that fit in 11 bits total, and it
     165             :          *  does not matter if we miss a few rare codes. */
     166         528 :         for (i = 0, g = -16; g < 16; g++) {
     167         512 :             int len0   = s->len[p0][g & 255];
     168         512 :             int limit0 = VLC_BITS - len0;
     169         512 :             if (limit0 < 2 || !len0)
     170           0 :                 continue;
     171       16896 :             for (b = -16; b < 16; b++) {
     172       16384 :                 int len1   = s->len[p1][b & 255];
     173       16384 :                 int limit1 = limit0 - len1;
     174       16384 :                 if (limit1 < 1 || !len1)
     175       12656 :                     continue;
     176        3728 :                 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
     177      123024 :                 for (r = -16; r < 16; r++) {
     178      119296 :                     int len2 = s->len[2][r & 255];
     179      119296 :                     if (len2 > limit1 || !len2)
     180      108368 :                         continue;
     181       10928 :                     av_assert0(i < (1 << VLC_BITS));
     182       10928 :                     len[i]  = len0 + len1 + len2;
     183       10928 :                     bits[i] = (code << len2) + s->bits[2][r & 255];
     184       10928 :                     if (s->decorrelate) {
     185       10928 :                         map[i][G] = g;
     186       10928 :                         map[i][B] = g + b;
     187       10928 :                         map[i][R] = g + r;
     188             :                     } else {
     189           0 :                         map[i][B] = g;
     190           0 :                         map[i][G] = b;
     191           0 :                         map[i][R] = r;
     192             :                     }
     193       10928 :                     i++;
     194             :                 }
     195             :             }
     196             :         }
     197          16 :         ff_free_vlc(&s->vlc[4]);
     198          16 :         if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
     199             :                             bits, 2, 2, 0)) < 0)
     200           0 :             goto out;
     201             :     }
     202          69 :     ret = 0;
     203          69 : out:
     204          69 :     av_freep(&symbols);
     205          69 :     return ret;
     206             : }
     207             : 
     208          69 : static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
     209             : {
     210             :     GetBitContext gb;
     211             :     int i, ret;
     212          69 :     int count = 3;
     213             : 
     214          69 :     if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
     215           0 :         return ret;
     216             : 
     217          69 :     if (s->version > 2)
     218          32 :         count = 1 + s->alpha + 2*s->chroma;
     219             : 
     220         276 :     for (i = 0; i < count; i++) {
     221         207 :         if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
     222           0 :             return ret;
     223         207 :         if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
     224           0 :             return ret;
     225         207 :         ff_free_vlc(&s->vlc[i]);
     226         207 :         if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
     227             :                            s->bits[i], 4, 4, 0)) < 0)
     228           0 :             return ret;
     229             :     }
     230             : 
     231          69 :     if ((ret = generate_joint_tables(s)) < 0)
     232           0 :         return ret;
     233             : 
     234          69 :     return (get_bits_count(&gb) + 7) / 8;
     235             : }
     236             : 
     237           0 : static int read_old_huffman_tables(HYuvContext *s)
     238             : {
     239             :     GetBitContext gb;
     240             :     int i, ret;
     241             : 
     242           0 :     init_get_bits(&gb, classic_shift_luma,
     243             :                   classic_shift_luma_table_size * 8);
     244           0 :     if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
     245           0 :         return ret;
     246             : 
     247           0 :     init_get_bits(&gb, classic_shift_chroma,
     248             :                   classic_shift_chroma_table_size * 8);
     249           0 :     if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
     250           0 :         return ret;
     251             : 
     252           0 :     for (i = 0; i < 256; i++)
     253           0 :         s->bits[0][i] = classic_add_luma[i];
     254           0 :     for (i = 0; i < 256; i++)
     255           0 :         s->bits[1][i] = classic_add_chroma[i];
     256             : 
     257           0 :     if (s->bitstream_bpp >= 24) {
     258           0 :         memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
     259           0 :         memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
     260             :     }
     261           0 :     memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
     262           0 :     memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
     263             : 
     264           0 :     for (i = 0; i < 4; i++) {
     265           0 :         ff_free_vlc(&s->vlc[i]);
     266           0 :         if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
     267             :                             s->bits[i], 4, 4, 0)) < 0)
     268           0 :             return ret;
     269             :     }
     270             : 
     271           0 :     if ((ret = generate_joint_tables(s)) < 0)
     272           0 :         return ret;
     273             : 
     274           0 :     return 0;
     275             : }
     276             : 
     277          69 : static av_cold int decode_end(AVCodecContext *avctx)
     278             : {
     279          69 :     HYuvContext *s = avctx->priv_data;
     280             :     int i;
     281             : 
     282          69 :     ff_huffyuv_common_end(s);
     283          69 :     av_freep(&s->bitstream_buffer);
     284             : 
     285         621 :     for (i = 0; i < 8; i++)
     286         552 :         ff_free_vlc(&s->vlc[i]);
     287             : 
     288          69 :     return 0;
     289             : }
     290             : 
     291          69 : static av_cold int decode_init(AVCodecContext *avctx)
     292             : {
     293          69 :     HYuvContext *s = avctx->priv_data;
     294             :     int ret;
     295             : 
     296          69 :     ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
     297          69 :     if (ret < 0)
     298           0 :         return ret;
     299             : 
     300          69 :     ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
     301          69 :     ff_llviddsp_init(&s->llviddsp);
     302          69 :     memset(s->vlc, 0, 4 * sizeof(VLC));
     303             : 
     304          69 :     s->interlaced = avctx->height > 288;
     305          69 :     s->bgr32      = 1;
     306             : 
     307          69 :     if (avctx->extradata_size) {
     308          81 :         if ((avctx->bits_per_coded_sample & 7) &&
     309          12 :             avctx->bits_per_coded_sample != 12)
     310           0 :             s->version = 1; // do such files exist at all?
     311          69 :         else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
     312          37 :             s->version = 2;
     313             :         else
     314          32 :             s->version = 3;
     315             :     } else
     316           0 :         s->version = 0;
     317             : 
     318          69 :     s->bps = 8;
     319          69 :     s->n = 1<<s->bps;
     320          69 :     s->vlc_n = FFMIN(s->n, MAX_VLC_N);
     321          69 :     s->chroma = 1;
     322          69 :     if (s->version >= 2) {
     323             :         int method, interlace;
     324             : 
     325          69 :         if (avctx->extradata_size < 4)
     326           0 :             return AVERROR_INVALIDDATA;
     327             : 
     328          69 :         method           = avctx->extradata[0];
     329          69 :         s->decorrelate   = method & 64 ? 1 : 0;
     330          69 :         s->predictor     = method & 63;
     331          69 :         if (s->version == 2) {
     332          37 :             s->bitstream_bpp = avctx->extradata[1];
     333          37 :             if (s->bitstream_bpp == 0)
     334           0 :                 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
     335             :         } else {
     336          32 :             s->bps = (avctx->extradata[1] >> 4) + 1;
     337          32 :             s->n = 1<<s->bps;
     338          32 :             s->vlc_n = FFMIN(s->n, MAX_VLC_N);
     339          32 :             s->chroma_h_shift = avctx->extradata[1] & 3;
     340          32 :             s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
     341          32 :             s->yuv   = !!(avctx->extradata[2] & 1);
     342          32 :             s->chroma= !!(avctx->extradata[2] & 3);
     343          32 :             s->alpha = !!(avctx->extradata[2] & 4);
     344             :         }
     345          69 :         interlace     = (avctx->extradata[2] & 0x30) >> 4;
     346          69 :         s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
     347          69 :         s->context    = avctx->extradata[2] & 0x40 ? 1 : 0;
     348             : 
     349          69 :         if ((ret = read_huffman_tables(s, avctx->extradata + 4,
     350          69 :                                        avctx->extradata_size - 4)) < 0)
     351           0 :             goto error;
     352             :     } else {
     353           0 :         switch (avctx->bits_per_coded_sample & 7) {
     354           0 :         case 1:
     355           0 :             s->predictor   = LEFT;
     356           0 :             s->decorrelate = 0;
     357           0 :             break;
     358           0 :         case 2:
     359           0 :             s->predictor   = LEFT;
     360           0 :             s->decorrelate = 1;
     361           0 :             break;
     362           0 :         case 3:
     363           0 :             s->predictor   = PLANE;
     364           0 :             s->decorrelate = avctx->bits_per_coded_sample >= 24;
     365           0 :             break;
     366           0 :         case 4:
     367           0 :             s->predictor   = MEDIAN;
     368           0 :             s->decorrelate = 0;
     369           0 :             break;
     370           0 :         default:
     371           0 :             s->predictor   = LEFT; // OLD
     372           0 :             s->decorrelate = 0;
     373           0 :             break;
     374             :         }
     375           0 :         s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
     376           0 :         s->context       = 0;
     377             : 
     378           0 :         if ((ret = read_old_huffman_tables(s)) < 0)
     379           0 :             goto error;
     380             :     }
     381             : 
     382          69 :     if (s->version <= 2) {
     383          37 :         switch (s->bitstream_bpp) {
     384          12 :         case 12:
     385          12 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P;
     386          12 :             s->yuv = 1;
     387          12 :             break;
     388           9 :         case 16:
     389           9 :             if (s->yuy2)
     390           0 :                 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
     391             :             else
     392           9 :                 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
     393           9 :             s->yuv = 1;
     394           9 :             break;
     395           8 :         case 24:
     396           8 :             if (s->bgr32)
     397           8 :                 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
     398             :             else
     399           0 :                 avctx->pix_fmt = AV_PIX_FMT_BGR24;
     400           8 :             break;
     401           8 :         case 32:
     402           8 :             av_assert0(s->bgr32);
     403           8 :             avctx->pix_fmt = AV_PIX_FMT_RGB32;
     404           8 :             s->alpha = 1;
     405           8 :             break;
     406           0 :         default:
     407           0 :             ret = AVERROR_INVALIDDATA;
     408           0 :             goto error;
     409             :         }
     410          37 :         av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
     411             :                                          &s->chroma_h_shift,
     412             :                                          &s->chroma_v_shift);
     413             :     } else {
     414          32 :         switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
     415           0 :         case 0x070:
     416           0 :             avctx->pix_fmt = AV_PIX_FMT_GRAY8;
     417           0 :             break;
     418           0 :         case 0x0F0:
     419           0 :             avctx->pix_fmt = AV_PIX_FMT_GRAY16;
     420           0 :             break;
     421           0 :         case 0x170:
     422           0 :             avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
     423           0 :             break;
     424           0 :         case 0x470:
     425           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP;
     426           0 :             break;
     427           0 :         case 0x480:
     428           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP9;
     429           0 :             break;
     430           0 :         case 0x490:
     431           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP10;
     432           0 :             break;
     433           0 :         case 0x4B0:
     434           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP12;
     435           0 :             break;
     436           0 :         case 0x4D0:
     437           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP14;
     438           0 :             break;
     439           0 :         case 0x4F0:
     440           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRP16;
     441           0 :             break;
     442           0 :         case 0x570:
     443           0 :             avctx->pix_fmt = AV_PIX_FMT_GBRAP;
     444           0 :             break;
     445           8 :         case 0x670:
     446           8 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P;
     447           8 :             break;
     448           0 :         case 0x680:
     449           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
     450           0 :             break;
     451           0 :         case 0x690:
     452           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
     453           0 :             break;
     454           0 :         case 0x6B0:
     455           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
     456           0 :             break;
     457           0 :         case 0x6D0:
     458           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
     459           0 :             break;
     460           8 :         case 0x6F0:
     461           8 :             avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
     462           8 :             break;
     463           0 :         case 0x671:
     464           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P;
     465           0 :             break;
     466           0 :         case 0x681:
     467           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
     468           0 :             break;
     469           8 :         case 0x691:
     470           8 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
     471           8 :             break;
     472           0 :         case 0x6B1:
     473           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
     474           0 :             break;
     475           0 :         case 0x6D1:
     476           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
     477           0 :             break;
     478           0 :         case 0x6F1:
     479           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
     480           0 :             break;
     481           0 :         case 0x672:
     482           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV411P;
     483           0 :             break;
     484           0 :         case 0x674:
     485           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV440P;
     486           0 :             break;
     487           0 :         case 0x675:
     488           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P;
     489           0 :             break;
     490           0 :         case 0x685:
     491           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
     492           0 :             break;
     493           0 :         case 0x695:
     494           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
     495           0 :             break;
     496           8 :         case 0x6B5:
     497           8 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
     498           8 :             break;
     499           0 :         case 0x6D5:
     500           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
     501           0 :             break;
     502           0 :         case 0x6F5:
     503           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
     504           0 :             break;
     505           0 :         case 0x67A:
     506           0 :             avctx->pix_fmt = AV_PIX_FMT_YUV410P;
     507           0 :             break;
     508           0 :         case 0x770:
     509           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
     510           0 :             break;
     511           0 :         case 0x780:
     512           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
     513           0 :             break;
     514           0 :         case 0x790:
     515           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
     516           0 :             break;
     517           0 :         case 0x7F0:
     518           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
     519           0 :             break;
     520           0 :         case 0x771:
     521           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
     522           0 :             break;
     523           0 :         case 0x781:
     524           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
     525           0 :             break;
     526           0 :         case 0x791:
     527           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
     528           0 :             break;
     529           0 :         case 0x7F1:
     530           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
     531           0 :             break;
     532           0 :         case 0x775:
     533           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
     534           0 :             break;
     535           0 :         case 0x785:
     536           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
     537           0 :             break;
     538           0 :         case 0x795:
     539           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
     540           0 :             break;
     541           0 :         case 0x7F5:
     542           0 :             avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
     543           0 :             break;
     544           0 :         default:
     545           0 :             ret = AVERROR_INVALIDDATA;
     546           0 :             goto error;
     547             :         }
     548             :     }
     549             : 
     550          69 :     ff_huffyuv_common_init(avctx);
     551             : 
     552          69 :     if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
     553           0 :         av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
     554           0 :         ret = AVERROR_INVALIDDATA;
     555           0 :         goto error;
     556             :     }
     557          69 :     if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
     558           0 :         avctx->width % 4) {
     559           0 :         av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
     560             :                "for this combination of colorspace and predictor type.\n");
     561           0 :         ret = AVERROR_INVALIDDATA;
     562           0 :         goto error;
     563             :     }
     564             : 
     565          69 :     if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
     566           0 :         ff_huffyuv_common_end(s);
     567           0 :         goto error;
     568             :     }
     569             : 
     570          69 :     return 0;
     571           0 :   error:
     572           0 :     decode_end(avctx);
     573           0 :     return ret;
     574             : }
     575             : 
     576             : #if HAVE_THREADS
     577           0 : static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
     578             : {
     579           0 :     HYuvContext *s = avctx->priv_data;
     580             :     int i, ret;
     581             : 
     582           0 :     s->avctx = avctx;
     583             : 
     584           0 :     if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
     585           0 :         ff_huffyuv_common_end(s);
     586           0 :         return ret;
     587             :     }
     588             : 
     589           0 :     for (i = 0; i < 8; i++)
     590           0 :         s->vlc[i].table = NULL;
     591             : 
     592           0 :     if (s->version >= 2) {
     593           0 :         if ((ret = read_huffman_tables(s, avctx->extradata + 4,
     594             :                                        avctx->extradata_size)) < 0)
     595           0 :             return ret;
     596             :     } else {
     597           0 :         if ((ret = read_old_huffman_tables(s)) < 0)
     598           0 :             return ret;
     599             :     }
     600             : 
     601           0 :     return 0;
     602             : }
     603             : #endif
     604             : 
     605             : /** Subset of GET_VLC for use in hand-roller VLC code */
     606             : #define VLC_INTERN(dst, table, gb, name, bits, max_depth)   \
     607             :     code = table[index][0];                                 \
     608             :     n    = table[index][1];                                 \
     609             :     if (max_depth > 1 && n < 0) {                           \
     610             :         LAST_SKIP_BITS(name, gb, bits);                     \
     611             :         UPDATE_CACHE(name, gb);                             \
     612             :                                                             \
     613             :         nb_bits = -n;                                       \
     614             :         index   = SHOW_UBITS(name, gb, nb_bits) + code;     \
     615             :         code    = table[index][0];                          \
     616             :         n       = table[index][1];                          \
     617             :         if (max_depth > 2 && n < 0) {                       \
     618             :             LAST_SKIP_BITS(name, gb, nb_bits);              \
     619             :             UPDATE_CACHE(name, gb);                         \
     620             :                                                             \
     621             :             nb_bits = -n;                                   \
     622             :             index   = SHOW_UBITS(name, gb, nb_bits) + code; \
     623             :             code    = table[index][0];                      \
     624             :             n       = table[index][1];                      \
     625             :         }                                                   \
     626             :     }                                                       \
     627             :     dst = code;                                             \
     628             :     LAST_SKIP_BITS(name, gb, n)
     629             : 
     630             : 
     631             : #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2,  \
     632             :                      bits, max_depth, OP)                           \
     633             :     do {                                                            \
     634             :         unsigned int index = SHOW_UBITS(name, gb, bits);            \
     635             :         int          code, n = dtable[index][1];                    \
     636             :                                                                     \
     637             :         if (n<=0) {                                                 \
     638             :             int nb_bits;                                            \
     639             :             VLC_INTERN(dst0, table1, gb, name, bits, max_depth);    \
     640             :                                                                     \
     641             :             UPDATE_CACHE(re, gb);                                   \
     642             :             index = SHOW_UBITS(name, gb, bits);                     \
     643             :             VLC_INTERN(dst1, table2, gb, name, bits, max_depth);    \
     644             :         } else {                                                    \
     645             :             code = dtable[index][0];                                \
     646             :             OP(dst0, dst1, code);                                   \
     647             :             LAST_SKIP_BITS(name, gb, n);                            \
     648             :         }                                                           \
     649             :     } while (0)
     650             : 
     651             : #define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
     652             : 
     653             : #define READ_2PIX(dst0, dst1, plane1)                                   \
     654             :     UPDATE_CACHE(re, &s->gb);                                           \
     655             :     GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table,        \
     656             :                  s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
     657             : 
     658       70390 : static void decode_422_bitstream(HYuvContext *s, int count)
     659             : {
     660             :     int i, icount;
     661       70390 :     OPEN_READER(re, &s->gb);
     662       70390 :     count /= 2;
     663             : 
     664       70390 :     icount = get_bits_left(&s->gb) / (32 * 4);
     665       70390 :     if (count >= icount) {
     666      147559 :         for (i = 0; i < icount; i++) {
     667      145894 :             READ_2PIX(s->temp[0][2 * i],     s->temp[1][i], 1);
     668      145894 :             READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
     669             :         }
     670      121205 :         for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
     671      119540 :             READ_2PIX(s->temp[0][2 * i    ], s->temp[1][i], 1);
     672      119540 :             if (BITS_LEFT(re, &s->gb) <= 0) break;
     673      119540 :             READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
     674             :         }
     675        1665 :         for (; i < count; i++)
     676           0 :             s->temp[0][2 * i    ] = s->temp[1][i] =
     677           0 :             s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
     678             :     } else {
     679    12345431 :         for (i = 0; i < count; i++) {
     680    12276706 :             READ_2PIX(s->temp[0][2 * i],     s->temp[1][i], 1);
     681    12276706 :             READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
     682             :         }
     683             :     }
     684       70390 :     CLOSE_READER(re, &s->gb);
     685       70390 : }
     686             : 
     687             : #define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
     688             :     UPDATE_CACHE(re, &s->gb); \
     689             :     GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
     690             :                  s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
     691             : 
     692             : #define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
     693             : 
     694             : /* TODO instead of restarting the read when the code isn't in the first level
     695             :  * of the joint table, jump into the 2nd level of the individual table. */
     696             : #define READ_2PIX_PLANE16(dst0, dst1, plane){\
     697             :     dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
     698             :     dst0 += get_bits(&s->gb, 2);\
     699             :     dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
     700             :     dst1 += get_bits(&s->gb, 2);\
     701             : }
     702      493900 : static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
     703             : {
     704      493900 :     int i, count = width/2;
     705             : 
     706      493900 :     if (s->bps <= 8) {
     707      134700 :         OPEN_READER(re, &s->gb);
     708      134700 :         if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
     709      213540 :             for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
     710      212153 :                 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
     711             :             }
     712             :         } else {
     713    22817460 :             for(i=0; i<count; i++){
     714    22684147 :                 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
     715             :             }
     716             :         }
     717      134700 :         if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
     718             :             unsigned int index;
     719             :             int nb_bits, code, n;
     720           0 :             UPDATE_CACHE(re, &s->gb);
     721           0 :             index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     722           0 :             VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
     723             :                        &s->gb, re, VLC_BITS, 3);
     724             :         }
     725      134700 :         CLOSE_READER(re, &s->gb);
     726      359200 :     } else if (s->bps <= 14) {
     727      224500 :         OPEN_READER(re, &s->gb);
     728      224500 :         if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
     729       83177 :             for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
     730       82104 :                 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
     731             :             }
     732             :         } else {
     733    26851123 :             for(i=0; i<count; i++){
     734    26627696 :                 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
     735             :             }
     736             :         }
     737      224500 :         if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
     738             :             unsigned int index;
     739             :             int nb_bits, code, n;
     740        5100 :             UPDATE_CACHE(re, &s->gb);
     741        5100 :             index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     742        5100 :             VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
     743             :                        &s->gb, re, VLC_BITS, 3);
     744             :         }
     745      224500 :         CLOSE_READER(re, &s->gb);
     746             :     } else {
     747      134700 :         if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
     748       57258 :             for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
     749       56886 :                 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
     750             :             }
     751             :         } else {
     752    22973742 :             for(i=0; i<count; i++){
     753    22839414 :                 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
     754             :             }
     755             :         }
     756      134700 :         if( width&1 && get_bits_left(&s->gb)>0 ) {
     757           0 :             int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
     758           0 :             s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
     759             :         }
     760             :     }
     761      493900 : }
     762             : 
     763       25490 : static void decode_gray_bitstream(HYuvContext *s, int count)
     764             : {
     765             :     int i;
     766       25490 :     OPEN_READER(re, &s->gb);
     767       25490 :     count /= 2;
     768             : 
     769       25490 :     if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
     770       75357 :         for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
     771       74930 :             READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
     772             :         }
     773             :     } else {
     774     4860583 :         for (i = 0; i < count; i++) {
     775     4835520 :             READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
     776             :         }
     777             :     }
     778       25490 :     CLOSE_READER(re, &s->gb);
     779       25490 : }
     780             : 
     781       89800 : static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
     782             :                                           int decorrelate, int alpha)
     783             : {
     784             :     int i;
     785       89800 :     OPEN_READER(re, &s->gb);
     786             : 
     787    30617800 :     for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
     788             :         unsigned int index;
     789             :         int code, n, nb_bits;
     790             : 
     791    30528000 :         UPDATE_CACHE(re, &s->gb);
     792    30528000 :         index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     793    30528000 :         n     = s->vlc[4].table[index][1];
     794             : 
     795    30528000 :         if (n>0) {
     796    13538088 :             code  = s->vlc[4].table[index][0];
     797    13538088 :             *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
     798    13538088 :             LAST_SKIP_BITS(re, &s->gb, n);
     799             :         } else {
     800    16989912 :             if (decorrelate) {
     801    16989912 :                 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
     802             :                            &s->gb, re, VLC_BITS, 3);
     803             : 
     804    16989912 :                 UPDATE_CACHE(re, &s->gb);
     805    16989912 :                 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     806    16989912 :                 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
     807    16989912 :                 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
     808             : 
     809    16989912 :                 UPDATE_CACHE(re, &s->gb);
     810    16989912 :                 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     811    16989912 :                 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
     812    16989912 :                 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
     813             :             } else {
     814           0 :                 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
     815             :                            &s->gb, re, VLC_BITS, 3);
     816             : 
     817           0 :                 UPDATE_CACHE(re, &s->gb);
     818           0 :                 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     819           0 :                 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
     820             :                            &s->gb, re, VLC_BITS, 3);
     821             : 
     822           0 :                 UPDATE_CACHE(re, &s->gb);
     823           0 :                 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     824           0 :                 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
     825             :                            &s->gb, re, VLC_BITS, 3);
     826             :             }
     827             :         }
     828    30528000 :         if (alpha) {
     829    15264000 :             UPDATE_CACHE(re, &s->gb);
     830    15264000 :             index = SHOW_UBITS(re, &s->gb, VLC_BITS);
     831    15264000 :             VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
     832             :                        &s->gb, re, VLC_BITS, 3);
     833             :         } else
     834    15264000 :             s->temp[0][4 * i + A] = 0;
     835             :     }
     836       89800 :     CLOSE_READER(re, &s->gb);
     837       89800 : }
     838             : 
     839       89800 : static void decode_bgr_bitstream(HYuvContext *s, int count)
     840             : {
     841       89800 :     if (s->decorrelate) {
     842       89800 :         if (s->bitstream_bpp == 24)
     843       44900 :             decode_bgr_1(s, count, 1, 0);
     844             :         else
     845       44900 :             decode_bgr_1(s, count, 1, 1);
     846             :     } else {
     847           0 :         if (s->bitstream_bpp == 24)
     848           0 :             decode_bgr_1(s, count, 0, 0);
     849             :         else
     850           0 :             decode_bgr_1(s, count, 0, 1);
     851             :     }
     852       89800 : }
     853             : 
     854       71590 : static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
     855             : {
     856             :     int h, cy, i;
     857             :     int offset[AV_NUM_DATA_POINTERS];
     858             : 
     859       71590 :     if (!s->avctx->draw_horiz_band)
     860       71590 :         return;
     861             : 
     862           0 :     h  = y - s->last_slice_end;
     863           0 :     y -= h;
     864             : 
     865           0 :     if (s->bitstream_bpp == 12)
     866           0 :         cy = y >> 1;
     867             :     else
     868           0 :         cy = y;
     869             : 
     870           0 :     offset[0] = frame->linesize[0] * y;
     871           0 :     offset[1] = frame->linesize[1] * cy;
     872           0 :     offset[2] = frame->linesize[2] * cy;
     873           0 :     for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
     874           0 :         offset[i] = 0;
     875           0 :     emms_c();
     876             : 
     877           0 :     s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
     878             : 
     879           0 :     s->last_slice_end = y + h;
     880             : }
     881             : 
     882      493900 : static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
     883             : {
     884      493900 :     if (s->bps <= 8) {
     885      134700 :         return s->llviddsp.add_left_pred(dst, src, w, acc);
     886             :     } else {
     887      359200 :         return s->llviddsp.add_left_pred_int16((      uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
     888             :     }
     889             : }
     890             : 
     891      134100 : static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
     892             : {
     893      134100 :     if (s->bps <= 8) {
     894           0 :         s->llviddsp.add_bytes(dst, src, w);
     895             :     } else {
     896      134100 :         s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
     897             :     }
     898      134100 : }
     899             : 
     900           0 : static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
     901             : {
     902           0 :     if (s->bps <= 8) {
     903           0 :         s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
     904             :     } else {
     905           0 :         s->hdsp.add_hfyu_median_pred_int16((uint16_t *)dst, (const uint16_t *)src, (const uint16_t *)diff, s->n-1, w, left, left_top);
     906             :     }
     907           0 : }
     908        1610 : static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     909             :                         AVPacket *avpkt)
     910             : {
     911        1610 :     const uint8_t *buf = avpkt->data;
     912        1610 :     int buf_size       = avpkt->size;
     913        1610 :     HYuvContext *s = avctx->priv_data;
     914        1610 :     const int width  = s->width;
     915        1610 :     const int width2 = s->width >> 1;
     916        1610 :     const int height = s->height;
     917             :     int fake_ystride, fake_ustride, fake_vstride;
     918        1610 :     ThreadFrame frame = { .f = data };
     919        1610 :     AVFrame *const p = data;
     920        1610 :     int table_size = 0, ret;
     921             : 
     922        1610 :     av_fast_padded_malloc(&s->bitstream_buffer,
     923             :                    &s->bitstream_buffer_size,
     924             :                    buf_size);
     925        1610 :     if (!s->bitstream_buffer)
     926           0 :         return AVERROR(ENOMEM);
     927             : 
     928        1610 :     s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
     929             :                       (const uint32_t *) buf, buf_size / 4);
     930             : 
     931        1610 :     if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
     932           0 :         return ret;
     933             : 
     934        1610 :     if (s->context) {
     935           0 :         table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
     936           0 :         if (table_size < 0)
     937           0 :             return table_size;
     938             :     }
     939             : 
     940        1610 :     if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
     941           0 :         return AVERROR_INVALIDDATA;
     942             : 
     943        1610 :     if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
     944        1610 :                              (buf_size - table_size) * 8)) < 0)
     945           0 :         return ret;
     946             : 
     947        1610 :     fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
     948        1610 :     fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
     949        1610 :     fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
     950             : 
     951        1610 :     s->last_slice_end = 0;
     952             : 
     953        1610 :     if (s->version > 2) {
     954             :         int plane;
     955        3200 :         for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
     956             :             int left, lefttop, y;
     957        2400 :             int w = width;
     958        2400 :             int h = height;
     959        2400 :             int fake_stride = fake_ystride;
     960             : 
     961        2400 :             if (s->chroma && (plane == 1 || plane == 2)) {
     962        1600 :                 w >>= s->chroma_h_shift;
     963        1600 :                 h >>= s->chroma_v_shift;
     964        1600 :                 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
     965             :             }
     966             : 
     967        2400 :             switch (s->predictor) {
     968        2400 :             case LEFT:
     969             :             case PLANE:
     970        2400 :                 decode_plane_bitstream(s, w, plane);
     971        2400 :                 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
     972             : 
     973      493900 :                 for (y = 1; y < h; y++) {
     974      491500 :                     uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
     975             : 
     976      491500 :                     decode_plane_bitstream(s, w, plane);
     977      491500 :                     left = left_prediction(s, dst, s->temp[0], w, left);
     978      491500 :                     if (s->predictor == PLANE) {
     979      134100 :                         if (y > s->interlaced) {
     980      134100 :                             add_bytes(s, dst, dst - fake_stride, w);
     981             :                         }
     982             :                     }
     983             :                 }
     984             : 
     985        2400 :                 break;
     986           0 :             case MEDIAN:
     987           0 :                 decode_plane_bitstream(s, w, plane);
     988           0 :                 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
     989             : 
     990           0 :                 y = 1;
     991             : 
     992             :                 /* second line is left predicted for interlaced case */
     993           0 :                 if (s->interlaced) {
     994           0 :                     decode_plane_bitstream(s, w, plane);
     995           0 :                     left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
     996           0 :                     y++;
     997             :                 }
     998             : 
     999           0 :                 lefttop = p->data[plane][0];
    1000           0 :                 decode_plane_bitstream(s, w, plane);
    1001           0 :                 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
    1002           0 :                 y++;
    1003             : 
    1004           0 :                 for (; y<h; y++) {
    1005             :                     uint8_t *dst;
    1006             : 
    1007           0 :                     decode_plane_bitstream(s, w, plane);
    1008             : 
    1009           0 :                     dst = p->data[plane] + p->linesize[plane] * y;
    1010             : 
    1011           0 :                     add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
    1012             :                 }
    1013             : 
    1014           0 :                 break;
    1015             :             }
    1016             :         }
    1017         800 :         draw_slice(s, p, height);
    1018         810 :     } else if (s->bitstream_bpp < 24) {
    1019             :         int y, cy;
    1020             :         int lefty, leftu, leftv;
    1021             :         int lefttopy, lefttopu, lefttopv;
    1022             : 
    1023         410 :         if (s->yuy2) {
    1024           0 :             p->data[0][3] = get_bits(&s->gb, 8);
    1025           0 :             p->data[0][2] = get_bits(&s->gb, 8);
    1026           0 :             p->data[0][1] = get_bits(&s->gb, 8);
    1027           0 :             p->data[0][0] = get_bits(&s->gb, 8);
    1028             : 
    1029           0 :             av_log(avctx, AV_LOG_ERROR,
    1030             :                    "YUY2 output is not implemented yet\n");
    1031           0 :             return AVERROR_PATCHWELCOME;
    1032             :         } else {
    1033         410 :             leftv         =
    1034         410 :             p->data[2][0] = get_bits(&s->gb, 8);
    1035         410 :             lefty         =
    1036         410 :             p->data[0][1] = get_bits(&s->gb, 8);
    1037         410 :             leftu         =
    1038         410 :             p->data[1][0] = get_bits(&s->gb, 8);
    1039         410 :             p->data[0][0] = get_bits(&s->gb, 8);
    1040             : 
    1041         410 :             switch (s->predictor) {
    1042         410 :             case LEFT:
    1043             :             case PLANE:
    1044         410 :                 decode_422_bitstream(s, width - 2);
    1045         820 :                 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
    1046         410 :                                                    width - 2, lefty);
    1047         410 :                 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1048         410 :                     leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
    1049         410 :                     leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
    1050             :                 }
    1051             : 
    1052       70390 :                 for (cy = y = 1; y < s->height; y++, cy++) {
    1053             :                     uint8_t *ydst, *udst, *vdst;
    1054             : 
    1055       70190 :                     if (s->bitstream_bpp == 12) {
    1056       25490 :                         decode_gray_bitstream(s, width);
    1057             : 
    1058       25490 :                         ydst = p->data[0] + p->linesize[0] * y;
    1059             : 
    1060       25490 :                         lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
    1061             :                                                            width, lefty);
    1062       25490 :                         if (s->predictor == PLANE) {
    1063           0 :                             if (y > s->interlaced)
    1064           0 :                                 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
    1065             :                         }
    1066       25490 :                         y++;
    1067       25490 :                         if (y >= s->height)
    1068         210 :                             break;
    1069             :                     }
    1070             : 
    1071       69980 :                     draw_slice(s, p, y);
    1072             : 
    1073       69980 :                     ydst = p->data[0] + p->linesize[0] * y;
    1074       69980 :                     udst = p->data[1] + p->linesize[1] * cy;
    1075       69980 :                     vdst = p->data[2] + p->linesize[2] * cy;
    1076             : 
    1077       69980 :                     decode_422_bitstream(s, width);
    1078       69980 :                     lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
    1079             :                                                        width, lefty);
    1080       69980 :                     if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1081       69980 :                         leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
    1082       69980 :                         leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
    1083             :                     }
    1084       69980 :                     if (s->predictor == PLANE) {
    1085           0 :                         if (cy > s->interlaced) {
    1086           0 :                             s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
    1087           0 :                             if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1088           0 :                                 s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
    1089           0 :                                 s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
    1090             :                             }
    1091             :                         }
    1092             :                     }
    1093             :                 }
    1094         410 :                 draw_slice(s, p, height);
    1095             : 
    1096         410 :                 break;
    1097           0 :             case MEDIAN:
    1098             :                 /* first line except first 2 pixels is left predicted */
    1099           0 :                 decode_422_bitstream(s, width - 2);
    1100           0 :                 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
    1101           0 :                                                    width - 2, lefty);
    1102           0 :                 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1103           0 :                     leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
    1104           0 :                     leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
    1105             :                 }
    1106             : 
    1107           0 :                 cy = y = 1;
    1108             : 
    1109             :                 /* second line is left predicted for interlaced case */
    1110           0 :                 if (s->interlaced) {
    1111           0 :                     decode_422_bitstream(s, width);
    1112           0 :                     lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
    1113           0 :                                                        s->temp[0], width, lefty);
    1114           0 :                     if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1115           0 :                         leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
    1116           0 :                         leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
    1117             :                     }
    1118           0 :                     y++;
    1119           0 :                     cy++;
    1120             :                 }
    1121             : 
    1122             :                 /* next 4 pixels are left predicted too */
    1123           0 :                 decode_422_bitstream(s, 4);
    1124           0 :                 lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
    1125           0 :                                                    s->temp[0], 4, lefty);
    1126           0 :                 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1127           0 :                     leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
    1128           0 :                     leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
    1129             :                 }
    1130             : 
    1131             :                 /* next line except the first 4 pixels is median predicted */
    1132           0 :                 lefttopy = p->data[0][3];
    1133           0 :                 decode_422_bitstream(s, width - 4);
    1134           0 :                 s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
    1135           0 :                                              p->data[0] + 4, s->temp[0],
    1136           0 :                                              width - 4, &lefty, &lefttopy);
    1137           0 :                 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1138           0 :                     lefttopu = p->data[1][1];
    1139           0 :                     lefttopv = p->data[2][1];
    1140           0 :                     s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
    1141           0 :                     s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
    1142             :                 }
    1143           0 :                 y++;
    1144           0 :                 cy++;
    1145             : 
    1146           0 :                 for (; y < height; y++, cy++) {
    1147             :                     uint8_t *ydst, *udst, *vdst;
    1148             : 
    1149           0 :                     if (s->bitstream_bpp == 12) {
    1150           0 :                         while (2 * cy > y) {
    1151           0 :                             decode_gray_bitstream(s, width);
    1152           0 :                             ydst = p->data[0] + p->linesize[0] * y;
    1153           0 :                             s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
    1154           0 :                                                          s->temp[0], width,
    1155             :                                                          &lefty, &lefttopy);
    1156           0 :                             y++;
    1157             :                         }
    1158           0 :                         if (y >= height)
    1159           0 :                             break;
    1160             :                     }
    1161           0 :                     draw_slice(s, p, y);
    1162             : 
    1163           0 :                     decode_422_bitstream(s, width);
    1164             : 
    1165           0 :                     ydst = p->data[0] + p->linesize[0] * y;
    1166           0 :                     udst = p->data[1] + p->linesize[1] * cy;
    1167           0 :                     vdst = p->data[2] + p->linesize[2] * cy;
    1168             : 
    1169           0 :                     s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
    1170           0 :                                                  s->temp[0], width,
    1171             :                                                  &lefty, &lefttopy);
    1172           0 :                     if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
    1173           0 :                         s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
    1174           0 :                         s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
    1175             :                     }
    1176             :                 }
    1177             : 
    1178           0 :                 draw_slice(s, p, height);
    1179           0 :                 break;
    1180             :             }
    1181             :         }
    1182             :     } else {
    1183             :         int y;
    1184             :         uint8_t left[4];
    1185         400 :         const int last_line = (height - 1) * p->linesize[0];
    1186             : 
    1187         400 :         if (s->bitstream_bpp == 32) {
    1188         200 :             left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
    1189         200 :             left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
    1190         200 :             left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
    1191         200 :             left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
    1192             :         } else {
    1193         200 :             left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
    1194         200 :             left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
    1195         200 :             left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
    1196         200 :             left[A] = p->data[0][last_line + A] = 255;
    1197         200 :             skip_bits(&s->gb, 8);
    1198             :         }
    1199             : 
    1200         400 :         if (s->bgr32) {
    1201         400 :             switch (s->predictor) {
    1202         400 :             case LEFT:
    1203             :             case PLANE:
    1204         400 :                 decode_bgr_bitstream(s, width - 1);
    1205        1200 :                 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
    1206         800 :                                                  s->temp[0], width - 1, left);
    1207             : 
    1208       89800 :                 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
    1209       89400 :                     decode_bgr_bitstream(s, width);
    1210             : 
    1211      178800 :                     s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
    1212       89400 :                                                      s->temp[0], width, left);
    1213       89400 :                     if (s->predictor == PLANE) {
    1214           0 :                         if (s->bitstream_bpp != 32)
    1215           0 :                             left[A] = 0;
    1216           0 :                         if (y < s->height - 1 - s->interlaced) {
    1217           0 :                             s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * y,
    1218           0 :                                               p->data[0] + p->linesize[0] * y +
    1219           0 :                                               fake_ystride, 4 * width);
    1220             :                         }
    1221             :                     }
    1222             :                 }
    1223             :                 // just 1 large slice as this is not possible in reverse order
    1224         400 :                 draw_slice(s, p, height);
    1225         400 :                 break;
    1226           0 :             default:
    1227           0 :                 av_log(avctx, AV_LOG_ERROR,
    1228             :                        "prediction type not supported!\n");
    1229             :             }
    1230             :         } else {
    1231           0 :             av_log(avctx, AV_LOG_ERROR,
    1232             :                    "BGR24 output is not implemented yet\n");
    1233           0 :             return AVERROR_PATCHWELCOME;
    1234             :         }
    1235             :     }
    1236        1610 :     emms_c();
    1237             : 
    1238        1610 :     *got_frame = 1;
    1239             : 
    1240        1610 :     return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
    1241             : }
    1242             : 
    1243             : AVCodec ff_huffyuv_decoder = {
    1244             :     .name             = "huffyuv",
    1245             :     .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
    1246             :     .type             = AVMEDIA_TYPE_VIDEO,
    1247             :     .id               = AV_CODEC_ID_HUFFYUV,
    1248             :     .priv_data_size   = sizeof(HYuvContext),
    1249             :     .init             = decode_init,
    1250             :     .close            = decode_end,
    1251             :     .decode           = decode_frame,
    1252             :     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
    1253             :                         AV_CODEC_CAP_FRAME_THREADS,
    1254             :     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
    1255             : };
    1256             : 
    1257             : #if CONFIG_FFVHUFF_DECODER
    1258             : AVCodec ff_ffvhuff_decoder = {
    1259             :     .name             = "ffvhuff",
    1260             :     .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
    1261             :     .type             = AVMEDIA_TYPE_VIDEO,
    1262             :     .id               = AV_CODEC_ID_FFVHUFF,
    1263             :     .priv_data_size   = sizeof(HYuvContext),
    1264             :     .init             = decode_init,
    1265             :     .close            = decode_end,
    1266             :     .decode           = decode_frame,
    1267             :     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
    1268             :                         AV_CODEC_CAP_FRAME_THREADS,
    1269             :     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
    1270             : };
    1271             : #endif /* CONFIG_FFVHUFF_DECODER */

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