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FFmpeg/libavcodec/huffyuv.c

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  1. /*

  2.  * huffyuv codec for libavcodec

  3.  *

  4.  * Copyright (c) 2002-2003 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. 

  26. /**

  27.  * @file

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "get_bits.h"

  33. #include "put_bits.h"

  34. #include "dsputil.h"

  35. #include "thread.h"

  36. 

  37. #define VLC_BITS 11

  38. 

  39. #if HAVE_BIGENDIAN

  40. #define B 3

  41. #define G 2

  42. #define R 1

  43. #define A 0

  44. #else

  45. #define B 0

  46. #define G 1

  47. #define R 2

  48. #define A 3

  49. #endif

  50. 

  51. typedef enum Predictor{

  52.     LEFT= 0,

  53.     PLANE,

  54.     MEDIAN,

  55. } Predictor;

  56. 

  57. typedef struct HYuvContext{

  58.     AVCodecContext *avctx;

  59.     Predictor predictor;

  60.     GetBitContext gb;

  61.     PutBitContext pb;

  62.     int interlaced;

  63.     int decorrelate;

  64.     int bitstream_bpp;

  65.     int version;

  66.     int yuy2;                               //use yuy2 instead of 422P

  67.     int bgr32;                              //use bgr32 instead of bgr24

  68.     int width, height;

  69.     int flags;

  70.     int context;

  71.     int picture_number;

  72.     int last_slice_end;

  73.     uint8_t *temp[3];

  74.     uint64_t stats[3][256];

  75.     uint8_t len[3][256];

  76.     uint32_t bits[3][256];

  77.     uint32_t pix_bgr_map[1<<VLC_BITS];

  78.     VLC vlc[6];                             //Y,U,V,YY,YU,YV

  79.     AVFrame picture;

  80.     uint8_t *bitstream_buffer;

  81.     unsigned int bitstream_buffer_size;

  82.     DSPContext dsp;

  83. }HYuvContext;

  84. 

  85. static const unsigned char classic_shift_luma[] = {

  86.   34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,

  87.   16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,

  88.   69,68, 0

  89. };

  90. 

  91. static const unsigned char classic_shift_chroma[] = {

  92.   66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,

  93.   56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,

  94.   214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0

  95. };

  96. 

  97. static const unsigned char classic_add_luma[256] = {

  98.     3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,

  99.    73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,

  100.    68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,

  101.    35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,

  102.    37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,

  103.    35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,

  104.    27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,

  105.    15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,

  106.    12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,

  107.    12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,

  108.    18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,

  109.    28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,

  110.    28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,

  111.    62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,

  112.    54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,

  113.    46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,

  114. };

  115. 

  116. static const unsigned char classic_add_chroma[256] = {

  117.     3,  1,  2,  2,  2,  2,  3,  3,  7,  5,  7,  5,  8,  6, 11,  9,

  118.     7, 13, 11, 10,  9,  8,  7,  5,  9,  7,  6,  4,  7,  5,  8,  7,

  119.    11,  8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,

  120.    43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,

  121.   143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,

  122.    80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,

  123.    17, 14,  5,  6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,

  124.   112,113,114,115,  4,117,118, 92, 94,121,122,  3,124,103,  2,  1,

  125.     0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,

  126.   135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,

  127.    52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,

  128.    19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10,  9,  8, 36,

  129.     7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,

  130.    83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,

  131.    14, 16, 17, 18, 20, 21, 12, 14, 15,  9, 10,  6,  9,  6,  5,  8,

  132.     6, 12,  8, 10,  7,  9,  6,  4,  6,  2,  2,  3,  3,  3,  3,  2,

  133. };

  134. 

  135. static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int left){

  136.     int i;

  137.     if(w<32){

  138.         for(i=0; i<w; i++){

  139.             const int temp= src[i];

  140.             dst[i]= temp - left;

  141.             left= temp;

  142.         }

  143.         return left;

  144.     }else{

  145.         for(i=0; i<16; i++){

  146.             const int temp= src[i];

  147.             dst[i]= temp - left;

  148.             left= temp;

  149.         }

  150.         s->dsp.diff_bytes(dst+16, src+16, src+15, w-16);

  151.         return src[w-1];

  152.     }

  153. }

  154. 

  155. static inline void sub_left_prediction_bgr32(HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int *red, int *green, int *blue, int *alpha){

  156.     int i;

  157.     int r,g,b,a;

  158.     r= *red;

  159.     g= *green;

  160.     b= *blue;

  161.     a= *alpha;

  162.     for(i=0; i<FFMIN(w,4); i++){

  163.         const int rt= src[i*4+R];

  164.         const int gt= src[i*4+G];

  165.         const int bt= src[i*4+B];

  166.         const int at= src[i*4+A];

  167.         dst[i*4+R]= rt - r;

  168.         dst[i*4+G]= gt - g;

  169.         dst[i*4+B]= bt - b;

  170.         dst[i*4+A]= at - a;

  171.         r = rt;

  172.         g = gt;

  173.         b = bt;

  174.         a = at;

  175.     }

  176.     s->dsp.diff_bytes(dst+16, src+16, src+12, w*4-16);

  177.     *red=   src[(w-1)*4+R];

  178.     *green= src[(w-1)*4+G];

  179.     *blue=  src[(w-1)*4+B];

  180.     *alpha= src[(w-1)*4+A];

  181. }

  182. 

  183. static inline void sub_left_prediction_rgb24(HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int *red, int *green, int *blue){

  184.     int i;

  185.     int r,g,b;

  186.     r= *red;

  187.     g= *green;

  188.     b= *blue;

  189.     for(i=0; i<FFMIN(w,16); i++){

  190.         const int rt= src[i*3+0];

  191.         const int gt= src[i*3+1];

  192.         const int bt= src[i*3+2];

  193.         dst[i*3+0]= rt - r;

  194.         dst[i*3+1]= gt - g;

  195.         dst[i*3+2]= bt - b;

  196.         r = rt;

  197.         g = gt;

  198.         b = bt;

  199.     }

  200.     s->dsp.diff_bytes(dst+48, src+48, src+48-3, w*3-48);

  201.     *red=   src[(w-1)*3+0];

  202.     *green= src[(w-1)*3+1];

  203.     *blue=  src[(w-1)*3+2];

  204. }

  205. 

  206. static int read_len_table(uint8_t *dst, GetBitContext *gb){

  207.     int i, val, repeat;

  208. 

  209.     for(i=0; i<256;){

  210.         repeat= get_bits(gb, 3);

  211.         val   = get_bits(gb, 5);

  212.         if(repeat==0)

  213.             repeat= get_bits(gb, 8);

  214. //printf("%d %d\n", val, repeat);

  215.         if(i+repeat > 256) {

  216.             av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");

  217.             return -1;

  218.         }

  219.         while (repeat--)

  220.             dst[i++] = val;

  221.     }

  222.     return 0;

  223. }

  224. 

  225. static int generate_bits_table(uint32_t *dst, const uint8_t *len_table){

  226.     int len, index;

  227.     uint32_t bits=0;

  228. 

  229.     for(len=32; len>0; len--){

  230.         for(index=0; index<256; index++){

  231.             if(len_table[index]==len)

  232.                 dst[index]= bits++;

  233.         }

  234.         if(bits & 1){

  235.             av_log(NULL, AV_LOG_ERROR, "Error generating huffman table\n");

  236.             return -1;

  237.         }

  238.         bits >>= 1;

  239.     }

  240.     return 0;

  241. }

  242. 

  243. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  244. typedef struct {

  245.     uint64_t val;

  246.     int name;

  247. } HeapElem;

  248. 

  249. static void heap_sift(HeapElem *h, int root, int size)

  250. {

  251.     while(root*2+1 < size) {

  252.         int child = root*2+1;

  253.         if(child < size-1 && h[child].val > h[child+1].val)

  254.             child++;

  255.         if(h[root].val > h[child].val) {

  256.             FFSWAP(HeapElem, h[root], h[child]);

  257.             root = child;

  258.         } else

  259.             break;

  260.     }

  261. }

  262. 

  263. static void generate_len_table(uint8_t *dst, const uint64_t *stats){

  264.     HeapElem h[256];

  265.     int up[2*256];

  266.     int len[2*256];

  267.     int offset, i, next;

  268.     int size = 256;

  269. 

  270.     for(offset=1; ; offset<<=1){

  271.         for(i=0; i<size; i++){

  272.             h[i].name = i;

  273.             h[i].val = (stats[i] << 8) + offset;

  274.         }

  275.         for(i=size/2-1; i>=0; i--)

  276.             heap_sift(h, i, size);

  277. 

  278.         for(next=size; next<size*2-1; next++){

  279.             // merge the two smallest entries, and put it back in the heap

  280.             uint64_t min1v = h[0].val;

  281.             up[h[0].name] = next;

  282.             h[0].val = INT64_MAX;

  283.             heap_sift(h, 0, size);

  284.             up[h[0].name] = next;

  285.             h[0].name = next;

  286.             h[0].val += min1v;

  287.             heap_sift(h, 0, size);

  288.         }

  289. 

  290.         len[2*size-2] = 0;

  291.         for(i=2*size-3; i>=size; i--)

  292.             len[i] = len[up[i]] + 1;

  293.         for(i=0; i<size; i++) {

  294.             dst[i] = len[up[i]] + 1;

  295.             if(dst[i] >= 32) break;

  296.         }

  297.         if(i==size) break;

  298.     }

  299. }

  300. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  301. 

  302. static void generate_joint_tables(HYuvContext *s){

  303.     uint16_t symbols[1<<VLC_BITS];

  304.     uint16_t bits[1<<VLC_BITS];

  305.     uint8_t len[1<<VLC_BITS];

  306.     if(s->bitstream_bpp < 24){

  307.         int p, i, y, u;

  308.         for(p=0; p<3; p++){

  309.             for(i=y=0; y<256; y++){

  310.                 int len0 = s->len[0][y];

  311.                 int limit = VLC_BITS - len0;

  312.                 if(limit <= 0)

  313.                     continue;

  314.                 for(u=0; u<256; u++){

  315.                     int len1 = s->len[p][u];

  316.                     if(len1 > limit)

  317.                         continue;

  318.                     len[i] = len0 + len1;

  319.                     bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];

  320.                     symbols[i] = (y<<8) + u;

  321.                     if(symbols[i] != 0xffff) // reserved to mean "invalid"

  322.                         i++;

  323.                 }

  324.             }

  325.             free_vlc(&s->vlc[3+p]);

  326.             init_vlc_sparse(&s->vlc[3+p], VLC_BITS, i, len, 1, 1, bits, 2, 2, symbols, 2, 2, 0);

  327.         }

  328.     }else{

  329.         uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;

  330.         int i, b, g, r, code;

  331.         int p0 = s->decorrelate;

  332.         int p1 = !s->decorrelate;

  333.         // restrict the range to +/-16 becaues that's pretty much guaranteed to

  334.         // cover all the combinations that fit in 11 bits total, and it doesn't

  335.         // matter if we miss a few rare codes.

  336.         for(i=0, g=-16; g<16; g++){

  337.             int len0 = s->len[p0][g&255];

  338.             int limit0 = VLC_BITS - len0;

  339.             if(limit0 < 2)

  340.                 continue;

  341.             for(b=-16; b<16; b++){

  342.                 int len1 = s->len[p1][b&255];

  343.                 int limit1 = limit0 - len1;

  344.                 if(limit1 < 1)

  345.                     continue;

  346.                 code = (s->bits[p0][g&255] << len1) + s->bits[p1][b&255];

  347.                 for(r=-16; r<16; r++){

  348.                     int len2 = s->len[2][r&255];

  349.                     if(len2 > limit1)

  350.                         continue;

  351.                     len[i] = len0 + len1 + len2;

  352.                     bits[i] = (code << len2) + s->bits[2][r&255];

  353.                     if(s->decorrelate){

  354.                         map[i][G] = g;

  355.                         map[i][B] = g+b;

  356.                         map[i][R] = g+r;

  357.                     }else{

  358.                         map[i][B] = g;

  359.                         map[i][G] = b;

  360.                         map[i][R] = r;

  361.                     }

  362.                     i++;

  363.                 }

  364.             }

  365.         }

  366.         free_vlc(&s->vlc[3]);

  367.         init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0);

  368.     }

  369. }

  370. 

  371. static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length){

  372.     GetBitContext gb;

  373.     int i;

  374. 

  375.     init_get_bits(&gb, src, length*8);

  376. 

  377.     for(i=0; i<3; i++){

  378.         if(read_len_table(s->len[i], &gb)<0)

  379.             return -1;

  380.         if(generate_bits_table(s->bits[i], s->len[i])<0){

  381.             return -1;

  382.         }

  383.         free_vlc(&s->vlc[i]);

  384.         init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);

  385.     }

  386. 

  387.     generate_joint_tables(s);

  388. 

  389.     return (get_bits_count(&gb)+7)/8;

  390. }

  391. 

  392. static int read_old_huffman_tables(HYuvContext *s){

  393. #if 1

  394.     GetBitContext gb;

  395.     int i;

  396. 

  397.     init_get_bits(&gb, classic_shift_luma, sizeof(classic_shift_luma)*8);

  398.     if(read_len_table(s->len[0], &gb)<0)

  399.         return -1;

  400.     init_get_bits(&gb, classic_shift_chroma, sizeof(classic_shift_chroma)*8);

  401.     if(read_len_table(s->len[1], &gb)<0)

  402.         return -1;

  403. 

  404.     for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma  [i];

  405.     for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];

  406. 

  407.     if(s->bitstream_bpp >= 24){

  408.         memcpy(s->bits[1], s->bits[0], 256*sizeof(uint32_t));

  409.         memcpy(s->len[1] , s->len [0], 256*sizeof(uint8_t));

  410.     }

  411.     memcpy(s->bits[2], s->bits[1], 256*sizeof(uint32_t));

  412.     memcpy(s->len[2] , s->len [1], 256*sizeof(uint8_t));

  413. 

  414.     for(i=0; i<3; i++){

  415.         free_vlc(&s->vlc[i]);

  416.         init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);

  417.     }

  418. 

  419.     generate_joint_tables(s);

  420. 

  421.     return 0;

  422. #else

  423.     av_log(s->avctx, AV_LOG_DEBUG, "v1 huffyuv is not supported \n");

  424.     return -1;

  425. #endif

  426. }

  427. 

  428. static av_cold void alloc_temp(HYuvContext *s){

  429.     int i;

  430. 

  431.     if(s->bitstream_bpp<24){

  432.         for(i=0; i<3; i++){

  433.             s->temp[i]= av_malloc(s->width + 16);

  434.         }

  435.     }else{

  436.         s->temp[0]= av_mallocz(4*s->width + 16);

  437.     }

  438. }

  439. 

  440. static av_cold int common_init(AVCodecContext *avctx){

  441.     HYuvContext *s = avctx->priv_data;

  442. 

  443.     s->avctx= avctx;

  444.     s->flags= avctx->flags;

  445. 

  446.     dsputil_init(&s->dsp, avctx);

  447. 

  448.     s->width= avctx->width;

  449.     s->height= avctx->height;

  450.     assert(s->width>0 && s->height>0);

  451. 

  452.     return 0;

  453. }

  454. 

  455. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  456. static av_cold int decode_init(AVCodecContext *avctx)

  457. {

  458.     HYuvContext *s = avctx->priv_data;

  459. 

  460.     common_init(avctx);

  461.     memset(s->vlc, 0, 3*sizeof(VLC));

  462. 

  463.     avctx->coded_frame= &s->picture;

  464.     avcodec_get_frame_defaults(&s->picture);

  465.     s->interlaced= s->height > 288;

  466. 

  467. s->bgr32=1;

  468. //if(avctx->extradata)

  469. //  printf("extradata:%X, extradata_size:%d\n", *(uint32_t*)avctx->extradata, avctx->extradata_size);

  470.     if(avctx->extradata_size){

  471.         if((avctx->bits_per_coded_sample&7) && avctx->bits_per_coded_sample != 12)

  472.             s->version=1; // do such files exist at all?

  473.         else

  474.             s->version=2;

  475.     }else

  476.         s->version=0;

  477. 

  478.     if(s->version==2){

  479.         int method, interlace;

  480. 

  481.         if (avctx->extradata_size < 4)

  482.             return -1;

  483. 

  484.         method= ((uint8_t*)avctx->extradata)[0];

  485.         s->decorrelate= method&64 ? 1 : 0;

  486.         s->predictor= method&63;

  487.         s->bitstream_bpp= ((uint8_t*)avctx->extradata)[1];

  488.         if(s->bitstream_bpp==0)

  489.             s->bitstream_bpp= avctx->bits_per_coded_sample&~7;

  490.         interlace= (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;

  491.         s->interlaced= (interlace==1) ? 1 : (interlace==2) ? 0 : s->interlaced;

  492.         s->context= ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;

  493. 

  494.         if(read_huffman_tables(s, ((uint8_t*)avctx->extradata)+4, avctx->extradata_size-4) < 0)

  495.             return -1;

  496.     }else{

  497.         switch(avctx->bits_per_coded_sample&7){

  498.         case 1:

  499.             s->predictor= LEFT;

  500.             s->decorrelate= 0;

  501.             break;

  502.         case 2:

  503.             s->predictor= LEFT;

  504.             s->decorrelate= 1;

  505.             break;

  506.         case 3:

  507.             s->predictor= PLANE;

  508.             s->decorrelate= avctx->bits_per_coded_sample >= 24;

  509.             break;

  510.         case 4:

  511.             s->predictor= MEDIAN;

  512.             s->decorrelate= 0;

  513.             break;

  514.         default:

  515.             s->predictor= LEFT; //OLD

  516.             s->decorrelate= 0;

  517.             break;

  518.         }

  519.         s->bitstream_bpp= avctx->bits_per_coded_sample & ~7;

  520.         s->context= 0;

  521. 

  522.         if(read_old_huffman_tables(s) < 0)

  523.             return -1;

  524.     }

  525. 

  526.     switch(s->bitstream_bpp){

  527.     case 12:

  528.         avctx->pix_fmt = PIX_FMT_YUV420P;

  529.         break;

  530.     case 16:

  531.         if(s->yuy2){

  532.             avctx->pix_fmt = PIX_FMT_YUYV422;

  533.         }else{

  534.             avctx->pix_fmt = PIX_FMT_YUV422P;

  535.         }

  536.         break;

  537.     case 24:

  538.     case 32:

  539.         if(s->bgr32){

  540.             avctx->pix_fmt = PIX_FMT_RGB32;

  541.         }else{

  542.             avctx->pix_fmt = PIX_FMT_BGR24;

  543.         }

  544.         break;

  545.     default:

  546.         assert(0);

  547.     }

  548. 

  549.     alloc_temp(s);

  550. 

  551. //    av_log(NULL, AV_LOG_DEBUG, "pred:%d bpp:%d hbpp:%d il:%d\n", s->predictor, s->bitstream_bpp, avctx->bits_per_coded_sample, s->interlaced);

  552. 

  553.     return 0;

  554. }

  555. 

  556. static av_cold int decode_init_thread_copy(AVCodecContext *avctx)

  557. {

  558.     HYuvContext *s = avctx->priv_data;

  559.     int i;

  560. 

  561.     avctx->coded_frame= &s->picture;

  562.     alloc_temp(s);

  563. 

  564.     for (i = 0; i < 6; i++)

  565.         s->vlc[i].table = NULL;

  566. 

  567.     if(s->version==2){

  568.         if(read_huffman_tables(s, ((uint8_t*)avctx->extradata)+4, avctx->extradata_size) < 0)

  569.             return -1;

  570.     }else{

  571.         if(read_old_huffman_tables(s) < 0)

  572.             return -1;

  573.     }

  574. 

  575.     return 0;

  576. }

  577. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  578. 

  579. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  580. static int store_table(HYuvContext *s, const uint8_t *len, uint8_t *buf){

  581.     int i;

  582.     int index= 0;

  583. 

  584.     for(i=0; i<256;){

  585.         int val= len[i];

  586.         int repeat=0;

  587. 

  588.         for(; i<256 && len[i]==val && repeat<255; i++)

  589.             repeat++;

  590. 

  591.         assert(val < 32 && val >0 && repeat<256 && repeat>0);

  592.         if(repeat>7){

  593.             buf[index++]= val;

  594.             buf[index++]= repeat;

  595.         }else{

  596.             buf[index++]= val | (repeat<<5);

  597.         }

  598.     }

  599. 

  600.     return index;

  601. }

  602. 

  603. static av_cold int encode_init(AVCodecContext *avctx)

  604. {

  605.     HYuvContext *s = avctx->priv_data;

  606.     int i, j;

  607. 

  608.     common_init(avctx);

  609. 

  610.     avctx->extradata= av_mallocz(1024*30); // 256*3+4 == 772

  611.     avctx->stats_out= av_mallocz(1024*30); // 21*256*3(%llu ) + 3(\n) + 1(0) = 16132

  612.     s->version=2;

  613. 

  614.     avctx->coded_frame= &s->picture;

  615. 

  616.     switch(avctx->pix_fmt){

  617.     case PIX_FMT_YUV420P:

  618.         s->bitstream_bpp= 12;

  619.         break;

  620.     case PIX_FMT_YUV422P:

  621.         s->bitstream_bpp= 16;

  622.         break;

  623.     case PIX_FMT_RGB32:

  624.         s->bitstream_bpp= 32;

  625.         break;

  626.     case PIX_FMT_RGB24:

  627.         s->bitstream_bpp= 24;

  628.         break;

  629.     default:

  630.         av_log(avctx, AV_LOG_ERROR, "format not supported\n");

  631.         return -1;

  632.     }

  633.     avctx->bits_per_coded_sample= s->bitstream_bpp;

  634.     s->decorrelate= s->bitstream_bpp >= 24;

  635.     s->predictor= avctx->prediction_method;

  636.     s->interlaced= avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;

  637.     if(avctx->context_model==1){

  638.         s->context= avctx->context_model;

  639.         if(s->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  640.             av_log(avctx, AV_LOG_ERROR, "context=1 is not compatible with 2 pass huffyuv encoding\n");

  641.             return -1;

  642.         }

  643.     }else s->context= 0;

  644. 

  645.     if(avctx->codec->id==CODEC_ID_HUFFYUV){

  646.         if(avctx->pix_fmt==PIX_FMT_YUV420P){

  647.             av_log(avctx, AV_LOG_ERROR, "Error: YV12 is not supported by huffyuv; use vcodec=ffvhuff or format=422p\n");

  648.             return -1;

  649.         }

  650.         if(avctx->context_model){

  651.             av_log(avctx, AV_LOG_ERROR, "Error: per-frame huffman tables are not supported by huffyuv; use vcodec=ffvhuff\n");

  652.             return -1;

  653.         }

  654.         if(s->interlaced != ( s->height > 288 ))

  655.             av_log(avctx, AV_LOG_INFO, "using huffyuv 2.2.0 or newer interlacing flag\n");

  656.     }

  657. 

  658.     if(s->bitstream_bpp>=24 && s->predictor==MEDIAN){

  659.         av_log(avctx, AV_LOG_ERROR, "Error: RGB is incompatible with median predictor\n");

  660.         return -1;

  661.     }

  662. 

  663.     ((uint8_t*)avctx->extradata)[0]= s->predictor | (s->decorrelate << 6);

  664.     ((uint8_t*)avctx->extradata)[1]= s->bitstream_bpp;

  665.     ((uint8_t*)avctx->extradata)[2]= s->interlaced ? 0x10 : 0x20;

  666.     if(s->context)

  667.         ((uint8_t*)avctx->extradata)[2]|= 0x40;

  668.     ((uint8_t*)avctx->extradata)[3]= 0;

  669.     s->avctx->extradata_size= 4;

  670. 

  671.     if(avctx->stats_in){

  672.         char *p= avctx->stats_in;

  673. 

  674.         for(i=0; i<3; i++)

  675.             for(j=0; j<256; j++)

  676.                 s->stats[i][j]= 1;

  677. 

  678.         for(;;){

  679.             for(i=0; i<3; i++){

  680.                 char *next;

  681. 

  682.                 for(j=0; j<256; j++){

  683.                     s->stats[i][j]+= strtol(p, &next, 0);

  684.                     if(next==p) return -1;

  685.                     p=next;

  686.                 }

  687.             }

  688.             if(p[0]==0 || p[1]==0 || p[2]==0) break;

  689.         }

  690.     }else{

  691.         for(i=0; i<3; i++)

  692.             for(j=0; j<256; j++){

  693.                 int d= FFMIN(j, 256-j);

  694. 

  695.                 s->stats[i][j]= 100000000/(d+1);

  696.             }

  697.     }

  698. 

  699.     for(i=0; i<3; i++){

  700.         generate_len_table(s->len[i], s->stats[i]);

  701. 

  702.         if(generate_bits_table(s->bits[i], s->len[i])<0){

  703.             return -1;

  704.         }

  705. 

  706.         s->avctx->extradata_size+=

  707.         store_table(s, s->len[i], &((uint8_t*)s->avctx->extradata)[s->avctx->extradata_size]);

  708.     }

  709. 

  710.     if(s->context){

  711.         for(i=0; i<3; i++){

  712.             int pels = s->width*s->height / (i?40:10);

  713.             for(j=0; j<256; j++){

  714.                 int d= FFMIN(j, 256-j);

  715.                 s->stats[i][j]= pels/(d+1);

  716.             }

  717.         }

  718.     }else{

  719.         for(i=0; i<3; i++)

  720.             for(j=0; j<256; j++)

  721.                 s->stats[i][j]= 0;

  722.     }

  723. 

  724. //    printf("pred:%d bpp:%d hbpp:%d il:%d\n", s->predictor, s->bitstream_bpp, avctx->bits_per_coded_sample, s->interlaced);

  725. 

  726.     alloc_temp(s);

  727. 

  728.     s->picture_number=0;

  729. 

  730.     return 0;

  731. }

  732. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  733. 

  734. /* TODO instead of restarting the read when the code isn't in the first level

  735.  * of the joint table, jump into the 2nd level of the individual table. */

  736. #define READ_2PIX(dst0, dst1, plane1){\

  737.     uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\

  738.     if(code != 0xffff){\

  739.         dst0 = code>>8;\

  740.         dst1 = code;\

  741.     }else{\

  742.         dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\

  743.         dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\

  744.     }\

  745. }

  746. 

  747. static void decode_422_bitstream(HYuvContext *s, int count){

  748.     int i;

  749. 

  750.     count/=2;

  751. 

  752.     if(count >= (get_bits_left(&s->gb))/(31*4)){

  753.         for(i=0; i<count && get_bits_count(&s->gb) < s->gb.size_in_bits; i++){

  754.             READ_2PIX(s->temp[0][2*i  ], s->temp[1][i], 1);

  755.             READ_2PIX(s->temp[0][2*i+1], s->temp[2][i], 2);

  756.         }

  757.     }else{

  758.         for(i=0; i<count; i++){

  759.             READ_2PIX(s->temp[0][2*i  ], s->temp[1][i], 1);

  760.             READ_2PIX(s->temp[0][2*i+1], s->temp[2][i], 2);

  761.         }

  762.     }

  763. }

  764. 

  765. static void decode_gray_bitstream(HYuvContext *s, int count){

  766.     int i;

  767. 

  768.     count/=2;

  769. 

  770.     if(count >= (get_bits_left(&s->gb))/(31*2)){

  771.         for(i=0; i<count && get_bits_count(&s->gb) < s->gb.size_in_bits; i++){

  772.             READ_2PIX(s->temp[0][2*i  ], s->temp[0][2*i+1], 0);

  773.         }

  774.     }else{

  775.         for(i=0; i<count; i++){

  776.             READ_2PIX(s->temp[0][2*i  ], s->temp[0][2*i+1], 0);

  777.         }

  778.     }

  779. }

  780. 

  781. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  782. static int encode_422_bitstream(HYuvContext *s, int offset, int count){

  783.     int i;

  784.     const uint8_t *y = s->temp[0] + offset;

  785.     const uint8_t *u = s->temp[1] + offset/2;

  786.     const uint8_t *v = s->temp[2] + offset/2;

  787. 

  788.     if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 2*4*count){

  789.         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  790.         return -1;

  791.     }

  792. 

  793. #define LOAD4\

  794.             int y0 = y[2*i];\

  795.             int y1 = y[2*i+1];\

  796.             int u0 = u[i];\

  797.             int v0 = v[i];

  798. 

  799.     count/=2;

  800.     if(s->flags&CODEC_FLAG_PASS1){

  801.         for(i=0; i<count; i++){

  802.             LOAD4;

  803.             s->stats[0][y0]++;

  804.             s->stats[1][u0]++;

  805.             s->stats[0][y1]++;

  806.             s->stats[2][v0]++;

  807.         }

  808.     }

  809.     if(s->avctx->flags2&CODEC_FLAG2_NO_OUTPUT)

  810.         return 0;

  811.     if(s->context){

  812.         for(i=0; i<count; i++){

  813.             LOAD4;

  814.             s->stats[0][y0]++;

  815.             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);

  816.             s->stats[1][u0]++;

  817.             put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);

  818.             s->stats[0][y1]++;

  819.             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);

  820.             s->stats[2][v0]++;

  821.             put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);

  822.         }

  823.     }else{

  824.         for(i=0; i<count; i++){

  825.             LOAD4;

  826.             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);

  827.             put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);

  828.             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);

  829.             put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);

  830.         }

  831.     }

  832.     return 0;

  833. }

  834. 

  835. static int encode_gray_bitstream(HYuvContext *s, int count){

  836.     int i;

  837. 

  838.     if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 4*count){

  839.         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  840.         return -1;

  841.     }

  842. 

  843. #define LOAD2\

  844.             int y0 = s->temp[0][2*i];\

  845.             int y1 = s->temp[0][2*i+1];

  846. #define STAT2\

  847.             s->stats[0][y0]++;\

  848.             s->stats[0][y1]++;

  849. #define WRITE2\

  850.             put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);\

  851.             put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);

  852. 

  853.     count/=2;

  854.     if(s->flags&CODEC_FLAG_PASS1){

  855.         for(i=0; i<count; i++){

  856.             LOAD2;

  857.             STAT2;

  858.         }

  859.     }

  860.     if(s->avctx->flags2&CODEC_FLAG2_NO_OUTPUT)

  861.         return 0;

  862. 

  863.     if(s->context){

  864.         for(i=0; i<count; i++){

  865.             LOAD2;

  866.             STAT2;

  867.             WRITE2;

  868.         }

  869.     }else{

  870.         for(i=0; i<count; i++){

  871.             LOAD2;

  872.             WRITE2;

  873.         }

  874.     }

  875.     return 0;

  876. }

  877. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  878. 

  879. static av_always_inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){

  880.     int i;

  881.     for(i=0; i<count; i++){

  882.         int code = get_vlc2(&s->gb, s->vlc[3].table, VLC_BITS, 1);

  883.         if(code != -1){

  884.             *(uint32_t*)&s->temp[0][4*i] = s->pix_bgr_map[code];

  885.         }else if(decorrelate){

  886.             s->temp[0][4*i+G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);

  887.             s->temp[0][4*i+B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+G];

  888.             s->temp[0][4*i+R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+G];

  889.         }else{

  890.             s->temp[0][4*i+B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);

  891.             s->temp[0][4*i+G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);

  892.             s->temp[0][4*i+R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);

  893.         }

  894.         if(alpha)

  895.             s->temp[0][4*i+A] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);

  896.     }

  897. }

  898. 

  899. static void decode_bgr_bitstream(HYuvContext *s, int count){

  900.     if(s->decorrelate){

  901.         if(s->bitstream_bpp==24)

  902.             decode_bgr_1(s, count, 1, 0);

  903.         else

  904.             decode_bgr_1(s, count, 1, 1);

  905.     }else{

  906.         if(s->bitstream_bpp==24)

  907.             decode_bgr_1(s, count, 0, 0);

  908.         else

  909.             decode_bgr_1(s, count, 0, 1);

  910.     }

  911. }

  912. 

  913. static inline int encode_bgra_bitstream(HYuvContext *s, int count, int planes){

  914.     int i;

  915. 

  916.     if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 4*planes*count){

  917.         av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  918.         return -1;

  919.     }

  920. 

  921. #define LOAD3\

  922.             int g= s->temp[0][planes==3 ? 3*i+1 : 4*i+G];\

  923.             int b= (s->temp[0][planes==3 ? 3*i+2 : 4*i+B] - g) & 0xff;\

  924.             int r= (s->temp[0][planes==3 ? 3*i+0 : 4*i+R] - g) & 0xff;\

  925.             int a= s->temp[0][planes*i+A];

  926. #define STAT3\

  927.             s->stats[0][b]++;\

  928.             s->stats[1][g]++;\

  929.             s->stats[2][r]++;\

  930.             if(planes==4) s->stats[2][a]++;

  931. #define WRITE3\

  932.             put_bits(&s->pb, s->len[1][g], s->bits[1][g]);\

  933.             put_bits(&s->pb, s->len[0][b], s->bits[0][b]);\

  934.             put_bits(&s->pb, s->len[2][r], s->bits[2][r]);\

  935.             if(planes==4) put_bits(&s->pb, s->len[2][a], s->bits[2][a]);

  936. 

  937.     if((s->flags&CODEC_FLAG_PASS1) && (s->avctx->flags2&CODEC_FLAG2_NO_OUTPUT)){

  938.         for(i=0; i<count; i++){

  939.             LOAD3;

  940.             STAT3;

  941.         }

  942.     }else if(s->context || (s->flags&CODEC_FLAG_PASS1)){

  943.         for(i=0; i<count; i++){

  944.             LOAD3;

  945.             STAT3;

  946.             WRITE3;

  947.         }

  948.     }else{

  949.         for(i=0; i<count; i++){

  950.             LOAD3;

  951.             WRITE3;

  952.         }

  953.     }

  954.     return 0;

  955. }

  956. 

  957. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  958. static void draw_slice(HYuvContext *s, int y){

  959.     int h, cy, i;

  960.     int offset[AV_NUM_DATA_POINTERS];

  961. 

  962.     if(s->avctx->draw_horiz_band==NULL)

  963.         return;

  964. 

  965.     h= y - s->last_slice_end;

  966.     y -= h;

  967. 

  968.     if(s->bitstream_bpp==12){

  969.         cy= y>>1;

  970.     }else{

  971.         cy= y;

  972.     }

  973. 

  974.     offset[0] = s->picture.linesize[0]*y;

  975.     offset[1] = s->picture.linesize[1]*cy;

  976.     offset[2] = s->picture.linesize[2]*cy;

  977.     for (i = 3; i < AV_NUM_DATA_POINTERS; i++)

  978.         offset[i] = 0;

  979.     emms_c();

  980. 

  981.     s->avctx->draw_horiz_band(s->avctx, &s->picture, offset, y, 3, h);

  982. 

  983.     s->last_slice_end= y + h;

  984. }

  985. 

  986. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  987.     const uint8_t *buf = avpkt->data;

  988.     int buf_size = avpkt->size;

  989.     HYuvContext *s = avctx->priv_data;

  990.     const int width= s->width;

  991.     const int width2= s->width>>1;

  992.     const int height= s->height;

  993.     int fake_ystride, fake_ustride, fake_vstride;

  994.     AVFrame * const p= &s->picture;

  995.     int table_size= 0;

  996. 

  997.     AVFrame *picture = data;

  998. 

  999.     av_fast_malloc(&s->bitstream_buffer, &s->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  1000.     if (!s->bitstream_buffer)

  1001.         return AVERROR(ENOMEM);

  1002. 

  1003.     memset(s->bitstream_buffer + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

  1004.     s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer, (const uint32_t*)buf, buf_size/4);

  1005. 

  1006.     if(p->data[0])

  1007.         ff_thread_release_buffer(avctx, p);

  1008. 

  1009.     p->reference= 0;

  1010.     if(ff_thread_get_buffer(avctx, p) < 0){

  1011.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1012.         return -1;

  1013.     }

  1014. 

  1015.     if(s->context){

  1016.         table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);

  1017.         if(table_size < 0)

  1018.             return -1;

  1019.     }

  1020. 

  1021.     if((unsigned)(buf_size-table_size) >= INT_MAX/8)

  1022.         return -1;

  1023. 

  1024.     init_get_bits(&s->gb, s->bitstream_buffer+table_size, (buf_size-table_size)*8);

  1025. 

  1026.     fake_ystride= s->interlaced ? p->linesize[0]*2  : p->linesize[0];

  1027.     fake_ustride= s->interlaced ? p->linesize[1]*2  : p->linesize[1];

  1028.     fake_vstride= s->interlaced ? p->linesize[2]*2  : p->linesize[2];

  1029. 

  1030.     s->last_slice_end= 0;

  1031. 

  1032.     if(s->bitstream_bpp<24){

  1033.         int y, cy;

  1034.         int lefty, leftu, leftv;

  1035.         int lefttopy, lefttopu, lefttopv;

  1036. 

  1037.         if(s->yuy2){

  1038.             p->data[0][3]= get_bits(&s->gb, 8);

  1039.             p->data[0][2]= get_bits(&s->gb, 8);

  1040.             p->data[0][1]= get_bits(&s->gb, 8);

  1041.             p->data[0][0]= get_bits(&s->gb, 8);

  1042. 

  1043.             av_log(avctx, AV_LOG_ERROR, "YUY2 output is not implemented yet\n");

  1044.             return -1;

  1045.         }else{

  1046. 

  1047.             leftv= p->data[2][0]= get_bits(&s->gb, 8);

  1048.             lefty= p->data[0][1]= get_bits(&s->gb, 8);

  1049.             leftu= p->data[1][0]= get_bits(&s->gb, 8);

  1050.                    p->data[0][0]= get_bits(&s->gb, 8);

  1051. 

  1052.             switch(s->predictor){

  1053.             case LEFT:

  1054.             case PLANE:

  1055.                 decode_422_bitstream(s, width-2);

  1056.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1057.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1058.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1059.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1060.                 }

  1061. 

  1062.                 for(cy=y=1; y<s->height; y++,cy++){

  1063.                     uint8_t *ydst, *udst, *vdst;

  1064. 

  1065.                     if(s->bitstream_bpp==12){

  1066.                         decode_gray_bitstream(s, width);

  1067. 

  1068.                         ydst= p->data[0] + p->linesize[0]*y;

  1069. 

  1070.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1071.                         if(s->predictor == PLANE){

  1072.                             if(y>s->interlaced)

  1073.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1074.                         }

  1075.                         y++;

  1076.                         if(y>=s->height) break;

  1077.                     }

  1078. 

  1079.                     draw_slice(s, y);

  1080. 

  1081.                     ydst= p->data[0] + p->linesize[0]*y;

  1082.                     udst= p->data[1] + p->linesize[1]*cy;

  1083.                     vdst= p->data[2] + p->linesize[2]*cy;

  1084. 

  1085.                     decode_422_bitstream(s, width);

  1086.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1087.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1088.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1089.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1090.                     }

  1091.                     if(s->predictor == PLANE){

  1092.                         if(cy>s->interlaced){

  1093.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1094.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1095.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1096.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1097.                             }

  1098.                         }

  1099.                     }

  1100.                 }

  1101.                 draw_slice(s, height);

  1102. 

  1103.                 break;

  1104.             case MEDIAN:

  1105.                 /* first line except first 2 pixels is left predicted */

  1106.                 decode_422_bitstream(s, width-2);

  1107.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1108.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1109.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1110.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1111.                 }

  1112. 

  1113.                 cy=y=1;

  1114. 

  1115.                 /* second line is left predicted for interlaced case */

  1116.                 if(s->interlaced){

  1117.                     decode_422_bitstream(s, width);

  1118.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1119.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1120.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1121.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1122.                     }

  1123.                     y++; cy++;

  1124.                 }

  1125. 

  1126.                 /* next 4 pixels are left predicted too */

  1127.                 decode_422_bitstream(s, 4);

  1128.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1129.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1130.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1131.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1132.                 }

  1133. 

  1134.                 /* next line except the first 4 pixels is median predicted */

  1135.                 lefttopy= p->data[0][3];

  1136.                 decode_422_bitstream(s, width-4);

  1137.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1138.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1139.                     lefttopu= p->data[1][1];

  1140.                     lefttopv= p->data[2][1];

  1141.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1142.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1143.                 }

  1144.                 y++; cy++;

  1145. 

  1146.                 for(; y<height; y++,cy++){

  1147.                     uint8_t *ydst, *udst, *vdst;

  1148. 

  1149.                     if(s->bitstream_bpp==12){

  1150.                         while(2*cy > y){

  1151.                             decode_gray_bitstream(s, width);

  1152.                             ydst= p->data[0] + p->linesize[0]*y;

  1153.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1154.                             y++;

  1155.                         }

  1156.                         if(y>=height) break;

  1157.                     }

  1158.                     draw_slice(s, y);

  1159. 

  1160.                     decode_422_bitstream(s, width);

  1161. 

  1162.                     ydst= p->data[0] + p->linesize[0]*y;

  1163.                     udst= p->data[1] + p->linesize[1]*cy;

  1164.                     vdst= p->data[2] + p->linesize[2]*cy;

  1165. 

  1166.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1167.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1168.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1169.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1170.                     }

  1171.                 }

  1172. 

  1173.                 draw_slice(s, height);

  1174.                 break;

  1175.             }

  1176.         }

  1177.     }else{

  1178.         int y;

  1179.         int leftr, leftg, leftb, lefta;

  1180.         const int last_line= (height-1)*p->linesize[0];

  1181. 

  1182.         if(s->bitstream_bpp==32){

  1183.             lefta= p->data[0][last_line+A]= get_bits(&s->gb, 8);

  1184.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1185.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1186.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1187.         }else{

  1188.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1189.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1190.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1191.             lefta= p->data[0][last_line+A]= 255;

  1192.             skip_bits(&s->gb, 8);

  1193.         }

  1194. 

  1195.         if(s->bgr32){

  1196.             switch(s->predictor){

  1197.             case LEFT:

  1198.             case PLANE:

  1199.                 decode_bgr_bitstream(s, width-1);

  1200.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1201. 

  1202.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1203.                     decode_bgr_bitstream(s, width);

  1204. 

  1205.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1206.                     if(s->predictor == PLANE){

  1207.                         if(s->bitstream_bpp!=32) lefta=0;

  1208.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1209.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1210.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1211.                         }

  1212.                     }

  1213.                 }

  1214.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1215.                 break;

  1216.             default:

  1217.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1218.             }

  1219.         }else{

  1220. 

  1221.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1222.             return -1;

  1223.         }

  1224.     }

  1225.     emms_c();

  1226. 

  1227.     *picture= *p;

  1228.     *data_size = sizeof(AVFrame);

  1229. 

  1230.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1231. }

  1232. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1233. 

  1234. static int common_end(HYuvContext *s){

  1235.     int i;

  1236. 

  1237.     for(i=0; i<3; i++){

  1238.         av_freep(&s->temp[i]);

  1239.     }

  1240.     return 0;

  1241. }

  1242. 

  1243. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1244. static av_cold int decode_end(AVCodecContext *avctx)

  1245. {

  1246.     HYuvContext *s = avctx->priv_data;

  1247.     int i;

  1248. 

  1249.     if (s->picture.data[0])

  1250.         avctx->release_buffer(avctx, &s->picture);

  1251. 

  1252.     common_end(s);

  1253.     av_freep(&s->bitstream_buffer);

  1254. 

  1255.     for(i=0; i<6; i++){

  1256.         free_vlc(&s->vlc[i]);

  1257.     }

  1258. 

  1259.     return 0;

  1260. }

  1261. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1262. 

  1263. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1264. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1265.     HYuvContext *s = avctx->priv_data;

  1266.     AVFrame *pict = data;

  1267.     const int width= s->width;

  1268.     const int width2= s->width>>1;

  1269.     const int height= s->height;

  1270.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1271.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1272.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1273.     AVFrame * const p= &s->picture;

  1274.     int i, j, size=0;

  1275. 

  1276.     *p = *pict;

  1277.     p->pict_type= AV_PICTURE_TYPE_I;

  1278.     p->key_frame= 1;

  1279. 

  1280.     if(s->context){

  1281.         for(i=0; i<3; i++){

  1282.             generate_len_table(s->len[i], s->stats[i]);

  1283.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1284.                 return -1;

  1285.             size+= store_table(s, s->len[i], &buf[size]);

  1286.         }

  1287. 

  1288.         for(i=0; i<3; i++)

  1289.             for(j=0; j<256; j++)

  1290.                 s->stats[i][j] >>= 1;

  1291.     }

  1292. 

  1293.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1294. 

  1295.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1296.         int lefty, leftu, leftv, y, cy;

  1297. 

  1298.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1299.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1300.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1301.         put_bits(&s->pb, 8,        p->data[0][0]);

  1302. 

  1303.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1304.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1305.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1306. 

  1307.         encode_422_bitstream(s, 2, width-2);

  1308. 

  1309.         if(s->predictor==MEDIAN){

  1310.             int lefttopy, lefttopu, lefttopv;

  1311.             cy=y=1;

  1312.             if(s->interlaced){

  1313.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1314.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1315.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1316. 

  1317.                 encode_422_bitstream(s, 0, width);

  1318.                 y++; cy++;

  1319.             }

  1320. 

  1321.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1322.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1323.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1324. 

  1325.             encode_422_bitstream(s, 0, 4);

  1326. 

  1327.             lefttopy= p->data[0][3];

  1328.             lefttopu= p->data[1][1];

  1329.             lefttopv= p->data[2][1];

  1330.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1331.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1332.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1333.             encode_422_bitstream(s, 0, width-4);

  1334.             y++; cy++;

  1335. 

  1336.             for(; y<height; y++,cy++){

  1337.                 uint8_t *ydst, *udst, *vdst;

  1338. 

  1339.                 if(s->bitstream_bpp==12){

  1340.                     while(2*cy > y){

  1341.                         ydst= p->data[0] + p->linesize[0]*y;

  1342.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1343.                         encode_gray_bitstream(s, width);

  1344.                         y++;

  1345.                     }

  1346.                     if(y>=height) break;

  1347.                 }

  1348.                 ydst= p->data[0] + p->linesize[0]*y;

  1349.                 udst= p->data[1] + p->linesize[1]*cy;

  1350.                 vdst= p->data[2] + p->linesize[2]*cy;

  1351. 

  1352.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1353.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1354.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1355. 

  1356.                 encode_422_bitstream(s, 0, width);

  1357.             }

  1358.         }else{

  1359.             for(cy=y=1; y<height; y++,cy++){

  1360.                 uint8_t *ydst, *udst, *vdst;

  1361. 

  1362.                 /* encode a luma only line & y++ */

  1363.                 if(s->bitstream_bpp==12){

  1364.                     ydst= p->data[0] + p->linesize[0]*y;

  1365. 

  1366.                     if(s->predictor == PLANE && s->interlaced < y){

  1367.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1368. 

  1369.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1370.                     }else{

  1371.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1372.                     }

  1373.                     encode_gray_bitstream(s, width);

  1374.                     y++;

  1375.                     if(y>=height) break;

  1376.                 }

  1377. 

  1378.                 ydst= p->data[0] + p->linesize[0]*y;

  1379.                 udst= p->data[1] + p->linesize[1]*cy;

  1380.                 vdst= p->data[2] + p->linesize[2]*cy;

  1381. 

  1382.                 if(s->predictor == PLANE && s->interlaced < cy){

  1383.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1384.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1385.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1386. 

  1387.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1388.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1389.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1390.                 }else{

  1391.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1392.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1393.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1394.                 }

  1395. 

  1396.                 encode_422_bitstream(s, 0, width);

  1397.             }

  1398.         }

  1399.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1400.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1401.         const int stride = -p->linesize[0];

  1402.         const int fake_stride = -fake_ystride;

  1403.         int y;

  1404.         int leftr, leftg, leftb, lefta;

  1405. 

  1406.         put_bits(&s->pb, 8, lefta= data[A]);

  1407.         put_bits(&s->pb, 8, leftr= data[R]);

  1408.         put_bits(&s->pb, 8, leftg= data[G]);

  1409.         put_bits(&s->pb, 8, leftb= data[B]);

  1410. 

  1411.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb, &lefta);

  1412.         encode_bgra_bitstream(s, width-1, 4);

  1413. 

  1414.         for(y=1; y<s->height; y++){

  1415.             uint8_t *dst = data + y*stride;

  1416.             if(s->predictor == PLANE && s->interlaced < y){

  1417.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1418.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb, &lefta);

  1419.             }else{

  1420.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb, &lefta);

  1421.             }

  1422.             encode_bgra_bitstream(s, width, 4);

  1423.         }

  1424.     }else if(avctx->pix_fmt == PIX_FMT_RGB24){

  1425.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1426.         const int stride = -p->linesize[0];

  1427.         const int fake_stride = -fake_ystride;

  1428.         int y;

  1429.         int leftr, leftg, leftb;

  1430. 

  1431.         put_bits(&s->pb, 8, leftr= data[0]);

  1432.         put_bits(&s->pb, 8, leftg= data[1]);

  1433.         put_bits(&s->pb, 8, leftb= data[2]);

  1434.         put_bits(&s->pb, 8, 0);

  1435. 

  1436.         sub_left_prediction_rgb24(s, s->temp[0], data+3, width-1, &leftr, &leftg, &leftb);

  1437.         encode_bgra_bitstream(s, width-1, 3);

  1438. 

  1439.         for(y=1; y<s->height; y++){

  1440.             uint8_t *dst = data + y*stride;

  1441.             if(s->predictor == PLANE && s->interlaced < y){

  1442.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*3);

  1443.                 sub_left_prediction_rgb24(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1444.             }else{

  1445.                 sub_left_prediction_rgb24(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1446.             }

  1447.             encode_bgra_bitstream(s, width, 3);

  1448.         }

  1449.     }else{

  1450.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1451.     }

  1452.     emms_c();

  1453. 

  1454.     size+= (put_bits_count(&s->pb)+31)/8;

  1455.     put_bits(&s->pb, 16, 0);

  1456.     put_bits(&s->pb, 15, 0);

  1457.     size/= 4;

  1458. 

  1459.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1460.         int j;

  1461.         char *p= avctx->stats_out;

  1462.         char *end= p + 1024*30;

  1463.         for(i=0; i<3; i++){

  1464.             for(j=0; j<256; j++){

  1465.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1466.                 p+= strlen(p);

  1467.                 s->stats[i][j]= 0;

  1468.             }

  1469.             snprintf(p, end-p, "\n");

  1470.             p++;

  1471.         }

  1472.     } else

  1473.         avctx->stats_out[0] = '\0';

  1474.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1475.         flush_put_bits(&s->pb);

  1476.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1477.     }

  1478. 

  1479.     s->picture_number++;

  1480. 

  1481.     return size*4;

  1482. }

  1483. 

  1484. static av_cold int encode_end(AVCodecContext *avctx)

  1485. {

  1486.     HYuvContext *s = avctx->priv_data;

  1487. 

  1488.     common_end(s);

  1489. 

  1490.     av_freep(&avctx->extradata);

  1491.     av_freep(&avctx->stats_out);

  1492. 

  1493.     return 0;

  1494. }

  1495. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1496. 

  1497. #if CONFIG_HUFFYUV_DECODER

  1498. AVCodec ff_huffyuv_decoder = {

  1499.     .name           = "huffyuv",

  1500.     .type           = AVMEDIA_TYPE_VIDEO,

  1501.     .id             = CODEC_ID_HUFFYUV,

  1502.     .priv_data_size = sizeof(HYuvContext),

  1503.     .init           = decode_init,

  1504.     .close          = decode_end,

  1505.     .decode         = decode_frame,

  1506.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1507.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1508.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1509. };

  1510. #endif

  1511. 

  1512. #if CONFIG_FFVHUFF_DECODER

  1513. AVCodec ff_ffvhuff_decoder = {

  1514.     .name           = "ffvhuff",

  1515.     .type           = AVMEDIA_TYPE_VIDEO,

  1516.     .id             = CODEC_ID_FFVHUFF,

  1517.     .priv_data_size = sizeof(HYuvContext),

  1518.     .init           = decode_init,

  1519.     .close          = decode_end,

  1520.     .decode         = decode_frame,

  1521.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1522.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1523.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1524. };

  1525. #endif

  1526. 

  1527. #if CONFIG_HUFFYUV_ENCODER

  1528. AVCodec ff_huffyuv_encoder = {

  1529.     .name           = "huffyuv",

  1530.     .type           = AVMEDIA_TYPE_VIDEO,

  1531.     .id             = CODEC_ID_HUFFYUV,

  1532.     .priv_data_size = sizeof(HYuvContext),

  1533.     .init           = encode_init,

  1534.     .encode         = encode_frame,

  1535.     .close          = encode_end,

  1536.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_NONE},

  1537.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1538. };

  1539. #endif

  1540. 

  1541. #if CONFIG_FFVHUFF_ENCODER

  1542. AVCodec ff_ffvhuff_encoder = {

  1543.     .name           = "ffvhuff",

  1544.     .type           = AVMEDIA_TYPE_VIDEO,

  1545.     .id             = CODEC_ID_FFVHUFF,

  1546.     .priv_data_size = sizeof(HYuvContext),

  1547.     .init           = encode_init,

  1548.     .encode         = encode_frame,

  1549.     .close          = encode_end,

  1550.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_NONE},

  1551.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1552. };

  1553. #endif