falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23900 Commits
32 Branches
745MB
Tree: b01dba14f3
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'b01dba14f3'
${ noResults }
FFmpeg/libavcodec/huffyuv.c

1476 lines
48KB
Raw Blame History 

  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. 

  36. #define VLC_BITS 11

  37. 

  38. #if HAVE_BIGENDIAN

  39. #define B 3

  40. #define G 2

  41. #define R 1

  42. #define A 0

  43. #else

  44. #define B 0

  45. #define G 1

  46. #define R 2

  47. #define A 3

  48. #endif

  49. 

  50. typedef enum Predictor{

  51.     LEFT= 0,

  52.     PLANE,

  53.     MEDIAN,

  54. } Predictor;

  55. 

  56. typedef struct HYuvContext{

  57.     AVCodecContext *avctx;

  58.     Predictor predictor;

  59.     GetBitContext gb;

  60.     PutBitContext pb;

  61.     int interlaced;

  62.     int decorrelate;

  63.     int bitstream_bpp;

  64.     int version;

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

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

  67.     int width, height;

  68.     int flags;

  69.     int context;

  70.     int picture_number;

  71.     int last_slice_end;

  72.     uint8_t *temp[3];

  73.     uint64_t stats[3][256];

  74.     uint8_t len[3][256];

  75.     uint32_t bits[3][256];

  76.     uint32_t pix_bgr_map[1<<VLC_BITS];

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

  78.     AVFrame picture;

  79.     uint8_t *bitstream_buffer;

  80.     unsigned int bitstream_buffer_size;

  81.     DSPContext dsp;

  82. }HYuvContext;

  83. 

  84. static const unsigned char classic_shift_luma[] = {

  85.   34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,

  86.   16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,

  87.   69,68, 0

  88. };

  89. 

  90. static const unsigned char classic_shift_chroma[] = {

  91.   66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,

  92.   56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,

  93.   214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0

  94. };

  95. 

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

  97.     3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,

  98.    73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,

  99.    68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,

  100.    35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,

  101.    37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,

  102.    35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,

  103.    27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,

  104.    15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,

  105.    12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,

  106.    12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,

  107.    18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,

  108.    28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,

  109.    28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,

  110.    62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,

  111.    54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,

  112.    46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,

  113. };

  114. 

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

  116.     3,  1,  2,  2,  2,  2,  3,  3,  7,  5,  7,  5,  8,  6, 11,  9,

  117.     7, 13, 11, 10,  9,  8,  7,  5,  9,  7,  6,  4,  7,  5,  8,  7,

  118.    11,  8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,

  119.    43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,

  120.   143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,

  121.    80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,

  122.    17, 14,  5,  6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,

  123.   112,113,114,115,  4,117,118, 92, 94,121,122,  3,124,103,  2,  1,

  124.     0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,

  125.   135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,

  126.    52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,

  127.    19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10,  9,  8, 36,

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

  129.    83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,

  130.    14, 16, 17, 18, 20, 21, 12, 14, 15,  9, 10,  6,  9,  6,  5,  8,

  131.     6, 12,  8, 10,  7,  9,  6,  4,  6,  2,  2,  3,  3,  3,  3,  2,

  132. };

  133. 

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

  135.     int i;

  136.     if(w<32){

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

  138.             const int temp= src[i];

  139.             dst[i]= temp - left;

  140.             left= temp;

  141.         }

  142.         return left;

  143.     }else{

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

  145.             const int temp= src[i];

  146.             dst[i]= temp - left;

  147.             left= temp;

  148.         }

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

  150.         return src[w-1];

  151.     }

  152. }

  153. 

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

  155.     int i;

  156.     int r,g,b;

  157.     r= *red;

  158.     g= *green;

  159.     b= *blue;

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

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

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

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

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

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

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

  167.         r = rt;

  168.         g = gt;

  169.         b = bt;

  170.     }

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

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

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

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

  175. }

  176. 

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

  178.     int i, val, repeat;

  179. 

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

  181.         repeat= get_bits(gb, 3);

  182.         val   = get_bits(gb, 5);

  183.         if(repeat==0)

  184.             repeat= get_bits(gb, 8);

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

  186.         if(i+repeat > 256) {

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

  188.             return -1;

  189.         }

  190.         while (repeat--)

  191.             dst[i++] = val;

  192.     }

  193.     return 0;

  194. }

  195. 

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

  197.     int len, index;

  198.     uint32_t bits=0;

  199. 

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

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

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

  203.                 dst[index]= bits++;

  204.         }

  205.         if(bits & 1){

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

  207.             return -1;

  208.         }

  209.         bits >>= 1;

  210.     }

  211.     return 0;

  212. }

  213. 

  214. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  215. typedef struct {

  216.     uint64_t val;

  217.     int name;

  218. } HeapElem;

  219. 

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

  221. {

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

  223.         int child = root*2+1;

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

  225.             child++;

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

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

  228.             root = child;

  229.         } else

  230.             break;

  231.     }

  232. }

  233. 

  234. static void generate_len_table(uint8_t *dst, const uint64_t *stats, int size){

  235.     HeapElem h[size];

  236.     int up[2*size];

  237.     int len[2*size];

  238.     int offset, i, next;

  239. 

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

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

  242.             h[i].name = i;

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

  244.         }

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

  246.             heap_sift(h, i, size);

  247. 

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

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

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

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

  252.             h[0].val = INT64_MAX;

  253.             heap_sift(h, 0, size);

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

  255.             h[0].name = next;

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

  257.             heap_sift(h, 0, size);

  258.         }

  259. 

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

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

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

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

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

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

  266.         }

  267.         if(i==size) break;

  268.     }

  269. }

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

  271. 

  272. static void generate_joint_tables(HYuvContext *s){

  273.     uint16_t symbols[1<<VLC_BITS];

  274.     uint16_t bits[1<<VLC_BITS];

  275.     uint8_t len[1<<VLC_BITS];

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

  277.         int p, i, y, u;

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

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

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

  281.                 int limit = VLC_BITS - len0;

  282.                 if(limit <= 0)

  283.                     continue;

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

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

  286.                     if(len1 > limit)

  287.                         continue;

  288.                     len[i] = len0 + len1;

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

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

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

  292.                         i++;

  293.                 }

  294.             }

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

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

  297.         }

  298.     }else{

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

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

  301.         int p0 = s->decorrelate;

  302.         int p1 = !s->decorrelate;

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

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

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

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

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

  308.             int limit0 = VLC_BITS - len0;

  309.             if(limit0 < 2)

  310.                 continue;

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

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

  313.                 int limit1 = limit0 - len1;

  314.                 if(limit1 < 1)

  315.                     continue;

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

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

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

  319.                     if(len2 > limit1)

  320.                         continue;

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

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

  323.                     if(s->decorrelate){

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

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

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

  327.                     }else{

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

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

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

  331.                     }

  332.                     i++;

  333.                 }

  334.             }

  335.         }

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

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

  338.     }

  339. }

  340. 

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

  342.     GetBitContext gb;

  343.     int i;

  344. 

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

  346. 

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

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

  349.             return -1;

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

  351.             return -1;

  352.         }

  353. #if 0

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

  355. printf("%6X, %2d,  %3d\n", s->bits[i][j], s->len[i][j], j);

  356. }

  357. #endif

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

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

  360.     }

  361. 

  362.     generate_joint_tables(s);

  363. 

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

  365. }

  366. 

  367. static int read_old_huffman_tables(HYuvContext *s){

  368. #if 1

  369.     GetBitContext gb;

  370.     int i;

  371. 

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

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

  374.         return -1;

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

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

  377.         return -1;

  378. 

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

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

  381. 

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

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

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

  385.     }

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

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

  388. 

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

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

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

  392.     }

  393. 

  394.     generate_joint_tables(s);

  395. 

  396.     return 0;

  397. #else

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

  399.     return -1;

  400. #endif

  401. }

  402. 

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

  404.     int i;

  405. 

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

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

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

  409.         }

  410.     }else{

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

  412.     }

  413. }

  414. 

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

  416.     HYuvContext *s = avctx->priv_data;

  417. 

  418.     s->avctx= avctx;

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

  420. 

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

  422. 

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

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

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

  426. 

  427.     return 0;

  428. }

  429. 

  430. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  431. static av_cold int decode_init(AVCodecContext *avctx)

  432. {

  433.     HYuvContext *s = avctx->priv_data;

  434. 

  435.     common_init(avctx);

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

  437. 

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

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

  440. 

  441. s->bgr32=1;

  442. //if(avctx->extradata)

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

  444.     if(avctx->extradata_size){

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

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

  447.         else

  448.             s->version=2;

  449.     }else

  450.         s->version=0;

  451. 

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

  453.         int method, interlace;

  454. 

  455.         if (avctx->extradata_size < 4)

  456.             return -1;

  457. 

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

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

  460.         s->predictor= method&63;

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

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

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

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

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

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

  467. 

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

  469.             return -1;

  470.     }else{

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

  472.         case 1:

  473.             s->predictor= LEFT;

  474.             s->decorrelate= 0;

  475.             break;

  476.         case 2:

  477.             s->predictor= LEFT;

  478.             s->decorrelate= 1;

  479.             break;

  480.         case 3:

  481.             s->predictor= PLANE;

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

  483.             break;

  484.         case 4:

  485.             s->predictor= MEDIAN;

  486.             s->decorrelate= 0;

  487.             break;

  488.         default:

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

  490.             s->decorrelate= 0;

  491.             break;

  492.         }

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

  494.         s->context= 0;

  495. 

  496.         if(read_old_huffman_tables(s) < 0)

  497.             return -1;

  498.     }

  499. 

  500.     switch(s->bitstream_bpp){

  501.     case 12:

  502.         avctx->pix_fmt = PIX_FMT_YUV420P;

  503.         break;

  504.     case 16:

  505.         if(s->yuy2){

  506.             avctx->pix_fmt = PIX_FMT_YUYV422;

  507.         }else{

  508.             avctx->pix_fmt = PIX_FMT_YUV422P;

  509.         }

  510.         break;

  511.     case 24:

  512.     case 32:

  513.         if(s->bgr32){

  514.             avctx->pix_fmt = PIX_FMT_RGB32;

  515.         }else{

  516.             avctx->pix_fmt = PIX_FMT_BGR24;

  517.         }

  518.         break;

  519.     default:

  520.         assert(0);

  521.     }

  522. 

  523.     alloc_temp(s);

  524. 

  525. //    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);

  526. 

  527.     return 0;

  528. }

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

  530. 

  531. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  533.     int i;

  534.     int index= 0;

  535. 

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

  537.         int val= len[i];

  538.         int repeat=0;

  539. 

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

  541.             repeat++;

  542. 

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

  544.         if(repeat>7){

  545.             buf[index++]= val;

  546.             buf[index++]= repeat;

  547.         }else{

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

  549.         }

  550.     }

  551. 

  552.     return index;

  553. }

  554. 

  555. static av_cold int encode_init(AVCodecContext *avctx)

  556. {

  557.     HYuvContext *s = avctx->priv_data;

  558.     int i, j;

  559. 

  560.     common_init(avctx);

  561. 

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

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

  564.     s->version=2;

  565. 

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

  567. 

  568.     switch(avctx->pix_fmt){

  569.     case PIX_FMT_YUV420P:

  570.         s->bitstream_bpp= 12;

  571.         break;

  572.     case PIX_FMT_YUV422P:

  573.         s->bitstream_bpp= 16;

  574.         break;

  575.     case PIX_FMT_RGB32:

  576.         s->bitstream_bpp= 24;

  577.         break;

  578.     default:

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

  580.         return -1;

  581.     }

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

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

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

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

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

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

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

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

  590.             return -1;

  591.         }

  592.     }else s->context= 0;

  593. 

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

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

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

  597.             return -1;

  598.         }

  599.         if(avctx->context_model){

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

  601.             return -1;

  602.         }

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

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

  605.     }

  606. 

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

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

  609.         return -1;

  610.     }

  611. 

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

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

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

  615.     if(s->context)

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

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

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

  619. 

  620.     if(avctx->stats_in){

  621.         char *p= avctx->stats_in;

  622. 

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

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

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

  626. 

  627.         for(;;){

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

  629.                 char *next;

  630. 

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

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

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

  634.                     p=next;

  635.                 }

  636.             }

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

  638.         }

  639.     }else{

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

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

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

  643. 

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

  645.             }

  646.     }

  647. 

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

  649.         generate_len_table(s->len[i], s->stats[i], 256);

  650. 

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

  652.             return -1;

  653.         }

  654. 

  655.         s->avctx->extradata_size+=

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

  657.     }

  658. 

  659.     if(s->context){

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

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

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

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

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

  665.             }

  666.         }

  667.     }else{

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

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

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

  671.     }

  672. 

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

  674. 

  675.     alloc_temp(s);

  676. 

  677.     s->picture_number=0;

  678. 

  679.     return 0;

  680. }

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

  682. 

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

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

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

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

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

  688.         dst0 = code>>8;\

  689.         dst1 = code;\

  690.     }else{\

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

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

  693.     }\

  694. }

  695. 

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

  697.     int i;

  698. 

  699.     count/=2;

  700. 

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

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

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

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

  705.         }

  706.     }else{

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

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

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

  710.         }

  711.     }

  712. }

  713. 

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

  715.     int i;

  716. 

  717.     count/=2;

  718. 

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

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

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

  722.         }

  723.     }else{

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

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

  726.         }

  727.     }

  728. }

  729. 

  730. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  732.     int i;

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

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

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

  736. 

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

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

  739.         return -1;

  740.     }

  741. 

  742. #define LOAD4\

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

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

  745.             int u0 = u[i];\

  746.             int v0 = v[i];

  747. 

  748.     count/=2;

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

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

  751.             LOAD4;

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

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

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

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

  756.         }

  757.     }

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

  759.         return 0;

  760.     if(s->context){

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

  762.             LOAD4;

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

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

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

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

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

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

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

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

  771.         }

  772.     }else{

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

  774.             LOAD4;

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

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

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

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

  779.         }

  780.     }

  781.     return 0;

  782. }

  783. 

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

  785.     int i;

  786. 

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

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

  789.         return -1;

  790.     }

  791. 

  792. #define LOAD2\

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

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

  795. #define STAT2\

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

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

  798. #define WRITE2\

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

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

  801. 

  802.     count/=2;

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

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

  805.             LOAD2;

  806.             STAT2;

  807.         }

  808.     }

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

  810.         return 0;

  811. 

  812.     if(s->context){

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

  814.             LOAD2;

  815.             STAT2;

  816.             WRITE2;

  817.         }

  818.     }else{

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

  820.             LOAD2;

  821.             WRITE2;

  822.         }

  823.     }

  824.     return 0;

  825. }

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

  827. 

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

  829.     int i;

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

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

  832.         if(code != -1){

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

  834.         }else if(decorrelate){

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

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

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

  838.         }else{

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

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

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

  842.         }

  843.         if(alpha)

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

  845.     }

  846. }

  847. 

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

  849.     if(s->decorrelate){

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

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

  852.         else

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

  854.     }else{

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

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

  857.         else

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

  859.     }

  860. }

  861. 

  862. static int encode_bgr_bitstream(HYuvContext *s, int count){

  863.     int i;

  864. 

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

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

  867.         return -1;

  868.     }

  869. 

  870. #define LOAD3\

  871.             int g= s->temp[0][4*i+G];\

  872.             int b= (s->temp[0][4*i+B] - g) & 0xff;\

  873.             int r= (s->temp[0][4*i+R] - g) & 0xff;

  874. #define STAT3\

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

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

  877.             s->stats[2][r]++;

  878. #define WRITE3\

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

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

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

  882. 

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

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

  885.             LOAD3;

  886.             STAT3;

  887.         }

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

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

  890.             LOAD3;

  891.             STAT3;

  892.             WRITE3;

  893.         }

  894.     }else{

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

  896.             LOAD3;

  897.             WRITE3;

  898.         }

  899.     }

  900.     return 0;

  901. }

  902. 

  903. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  905.     int h, cy;

  906.     int offset[4];

  907. 

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

  909.         return;

  910. 

  911.     h= y - s->last_slice_end;

  912.     y -= h;

  913. 

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

  915.         cy= y>>1;

  916.     }else{

  917.         cy= y;

  918.     }

  919. 

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

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

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

  923.     offset[3] = 0;

  924.     emms_c();

  925. 

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

  927. 

  928.     s->last_slice_end= y + h;

  929. }

  930. 

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

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

  933.     int buf_size = avpkt->size;

  934.     HYuvContext *s = avctx->priv_data;

  935.     const int width= s->width;

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

  937.     const int height= s->height;

  938.     int fake_ystride, fake_ustride, fake_vstride;

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

  940.     int table_size= 0;

  941. 

  942.     AVFrame *picture = data;

  943. 

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

  945.     if (!s->bitstream_buffer)

  946.         return AVERROR(ENOMEM);

  947. 

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

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

  950. 

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

  952.         avctx->release_buffer(avctx, p);

  953. 

  954.     p->reference= 0;

  955.     if(avctx->get_buffer(avctx, p) < 0){

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

  957.         return -1;

  958.     }

  959. 

  960.     if(s->context){

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

  962.         if(table_size < 0)

  963.             return -1;

  964.     }

  965. 

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

  967.         return -1;

  968. 

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

  970. 

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

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

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

  974. 

  975.     s->last_slice_end= 0;

  976. 

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

  978.         int y, cy;

  979.         int lefty, leftu, leftv;

  980.         int lefttopy, lefttopu, lefttopv;

  981. 

  982.         if(s->yuy2){

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

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

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

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

  987. 

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

  989.             return -1;

  990.         }else{

  991. 

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

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

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

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

  996. 

  997.             switch(s->predictor){

  998.             case LEFT:

  999.             case PLANE:

  1000.                 decode_422_bitstream(s, width-2);

  1001.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1002.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1003.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1004.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1005.                 }

  1006. 

  1007.                 for(cy=y=1; y<s->height; y++,cy++){

  1008.                     uint8_t *ydst, *udst, *vdst;

  1009. 

  1010.                     if(s->bitstream_bpp==12){

  1011.                         decode_gray_bitstream(s, width);

  1012. 

  1013.                         ydst= p->data[0] + p->linesize[0]*y;

  1014. 

  1015.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1016.                         if(s->predictor == PLANE){

  1017.                             if(y>s->interlaced)

  1018.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1019.                         }

  1020.                         y++;

  1021.                         if(y>=s->height) break;

  1022.                     }

  1023. 

  1024.                     draw_slice(s, y);

  1025. 

  1026.                     ydst= p->data[0] + p->linesize[0]*y;

  1027.                     udst= p->data[1] + p->linesize[1]*cy;

  1028.                     vdst= p->data[2] + p->linesize[2]*cy;

  1029. 

  1030.                     decode_422_bitstream(s, width);

  1031.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1032.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1033.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1034.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1035.                     }

  1036.                     if(s->predictor == PLANE){

  1037.                         if(cy>s->interlaced){

  1038.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1039.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1040.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1041.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1042.                             }

  1043.                         }

  1044.                     }

  1045.                 }

  1046.                 draw_slice(s, height);

  1047. 

  1048.                 break;

  1049.             case MEDIAN:

  1050.                 /* first line except first 2 pixels is left predicted */

  1051.                 decode_422_bitstream(s, width-2);

  1052.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1053.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1054.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1055.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1056.                 }

  1057. 

  1058.                 cy=y=1;

  1059. 

  1060.                 /* second line is left predicted for interlaced case */

  1061.                 if(s->interlaced){

  1062.                     decode_422_bitstream(s, width);

  1063.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1064.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1065.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1066.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1067.                     }

  1068.                     y++; cy++;

  1069.                 }

  1070. 

  1071.                 /* next 4 pixels are left predicted too */

  1072.                 decode_422_bitstream(s, 4);

  1073.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1074.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1075.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1076.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1077.                 }

  1078. 

  1079.                 /* next line except the first 4 pixels is median predicted */

  1080.                 lefttopy= p->data[0][3];

  1081.                 decode_422_bitstream(s, width-4);

  1082.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1083.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1084.                     lefttopu= p->data[1][1];

  1085.                     lefttopv= p->data[2][1];

  1086.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1087.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1088.                 }

  1089.                 y++; cy++;

  1090. 

  1091.                 for(; y<height; y++,cy++){

  1092.                     uint8_t *ydst, *udst, *vdst;

  1093. 

  1094.                     if(s->bitstream_bpp==12){

  1095.                         while(2*cy > y){

  1096.                             decode_gray_bitstream(s, width);

  1097.                             ydst= p->data[0] + p->linesize[0]*y;

  1098.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1099.                             y++;

  1100.                         }

  1101.                         if(y>=height) break;

  1102.                     }

  1103.                     draw_slice(s, y);

  1104. 

  1105.                     decode_422_bitstream(s, width);

  1106. 

  1107.                     ydst= p->data[0] + p->linesize[0]*y;

  1108.                     udst= p->data[1] + p->linesize[1]*cy;

  1109.                     vdst= p->data[2] + p->linesize[2]*cy;

  1110. 

  1111.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1112.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1113.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1114.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1115.                     }

  1116.                 }

  1117. 

  1118.                 draw_slice(s, height);

  1119.                 break;

  1120.             }

  1121.         }

  1122.     }else{

  1123.         int y;

  1124.         int leftr, leftg, leftb, lefta;

  1125.         const int last_line= (height-1)*p->linesize[0];

  1126. 

  1127.         if(s->bitstream_bpp==32){

  1128.             lefta= p->data[0][last_line+A]= get_bits(&s->gb, 8);

  1129.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1130.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1131.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1132.         }else{

  1133.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1134.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1135.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1136.             lefta= p->data[0][last_line+A]= 255;

  1137.             skip_bits(&s->gb, 8);

  1138.         }

  1139. 

  1140.         if(s->bgr32){

  1141.             switch(s->predictor){

  1142.             case LEFT:

  1143.             case PLANE:

  1144.                 decode_bgr_bitstream(s, width-1);

  1145.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1146. 

  1147.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1148.                     decode_bgr_bitstream(s, width);

  1149. 

  1150.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1151.                     if(s->predictor == PLANE){

  1152.                         if(s->bitstream_bpp!=32) lefta=0;

  1153.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1154.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1155.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1156.                         }

  1157.                     }

  1158.                 }

  1159.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1160.                 break;

  1161.             default:

  1162.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1163.             }

  1164.         }else{

  1165. 

  1166.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1167.             return -1;

  1168.         }

  1169.     }

  1170.     emms_c();

  1171. 

  1172.     *picture= *p;

  1173.     *data_size = sizeof(AVFrame);

  1174. 

  1175.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1176. }

  1177. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1178. 

  1179. static int common_end(HYuvContext *s){

  1180.     int i;

  1181. 

  1182.     for(i=0; i<3; i++){

  1183.         av_freep(&s->temp[i]);

  1184.     }

  1185.     return 0;

  1186. }

  1187. 

  1188. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1189. static av_cold int decode_end(AVCodecContext *avctx)

  1190. {

  1191.     HYuvContext *s = avctx->priv_data;

  1192.     int i;

  1193. 

  1194.     if (s->picture.data[0])

  1195.         avctx->release_buffer(avctx, &s->picture);

  1196. 

  1197.     common_end(s);

  1198.     av_freep(&s->bitstream_buffer);

  1199. 

  1200.     for(i=0; i<6; i++){

  1201.         free_vlc(&s->vlc[i]);

  1202.     }

  1203. 

  1204.     return 0;

  1205. }

  1206. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1207. 

  1208. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1209. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1210.     HYuvContext *s = avctx->priv_data;

  1211.     AVFrame *pict = data;

  1212.     const int width= s->width;

  1213.     const int width2= s->width>>1;

  1214.     const int height= s->height;

  1215.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1216.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1217.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1218.     AVFrame * const p= &s->picture;

  1219.     int i, j, size=0;

  1220. 

  1221.     *p = *pict;

  1222.     p->pict_type= FF_I_TYPE;

  1223.     p->key_frame= 1;

  1224. 

  1225.     if(s->context){

  1226.         for(i=0; i<3; i++){

  1227.             generate_len_table(s->len[i], s->stats[i], 256);

  1228.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1229.                 return -1;

  1230.             size+= store_table(s, s->len[i], &buf[size]);

  1231.         }

  1232. 

  1233.         for(i=0; i<3; i++)

  1234.             for(j=0; j<256; j++)

  1235.                 s->stats[i][j] >>= 1;

  1236.     }

  1237. 

  1238.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1239. 

  1240.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1241.         int lefty, leftu, leftv, y, cy;

  1242. 

  1243.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1244.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1245.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1246.         put_bits(&s->pb, 8,        p->data[0][0]);

  1247. 

  1248.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1249.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1250.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1251. 

  1252.         encode_422_bitstream(s, 2, width-2);

  1253. 

  1254.         if(s->predictor==MEDIAN){

  1255.             int lefttopy, lefttopu, lefttopv;

  1256.             cy=y=1;

  1257.             if(s->interlaced){

  1258.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1259.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1260.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1261. 

  1262.                 encode_422_bitstream(s, 0, width);

  1263.                 y++; cy++;

  1264.             }

  1265. 

  1266.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1267.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1268.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1269. 

  1270.             encode_422_bitstream(s, 0, 4);

  1271. 

  1272.             lefttopy= p->data[0][3];

  1273.             lefttopu= p->data[1][1];

  1274.             lefttopv= p->data[2][1];

  1275.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1276.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1277.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1278.             encode_422_bitstream(s, 0, width-4);

  1279.             y++; cy++;

  1280. 

  1281.             for(; y<height; y++,cy++){

  1282.                 uint8_t *ydst, *udst, *vdst;

  1283. 

  1284.                 if(s->bitstream_bpp==12){

  1285.                     while(2*cy > y){

  1286.                         ydst= p->data[0] + p->linesize[0]*y;

  1287.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1288.                         encode_gray_bitstream(s, width);

  1289.                         y++;

  1290.                     }

  1291.                     if(y>=height) break;

  1292.                 }

  1293.                 ydst= p->data[0] + p->linesize[0]*y;

  1294.                 udst= p->data[1] + p->linesize[1]*cy;

  1295.                 vdst= p->data[2] + p->linesize[2]*cy;

  1296. 

  1297.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1298.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1299.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1300. 

  1301.                 encode_422_bitstream(s, 0, width);

  1302.             }

  1303.         }else{

  1304.             for(cy=y=1; y<height; y++,cy++){

  1305.                 uint8_t *ydst, *udst, *vdst;

  1306. 

  1307.                 /* encode a luma only line & y++ */

  1308.                 if(s->bitstream_bpp==12){

  1309.                     ydst= p->data[0] + p->linesize[0]*y;

  1310. 

  1311.                     if(s->predictor == PLANE && s->interlaced < y){

  1312.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1313. 

  1314.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1315.                     }else{

  1316.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1317.                     }

  1318.                     encode_gray_bitstream(s, width);

  1319.                     y++;

  1320.                     if(y>=height) break;

  1321.                 }

  1322. 

  1323.                 ydst= p->data[0] + p->linesize[0]*y;

  1324.                 udst= p->data[1] + p->linesize[1]*cy;

  1325.                 vdst= p->data[2] + p->linesize[2]*cy;

  1326. 

  1327.                 if(s->predictor == PLANE && s->interlaced < cy){

  1328.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1329.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1330.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1331. 

  1332.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1333.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1334.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1335.                 }else{

  1336.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1337.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1338.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1339.                 }

  1340. 

  1341.                 encode_422_bitstream(s, 0, width);

  1342.             }

  1343.         }

  1344.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1345.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1346.         const int stride = -p->linesize[0];

  1347.         const int fake_stride = -fake_ystride;

  1348.         int y;

  1349.         int leftr, leftg, leftb;

  1350. 

  1351.         put_bits(&s->pb, 8, leftr= data[R]);

  1352.         put_bits(&s->pb, 8, leftg= data[G]);

  1353.         put_bits(&s->pb, 8, leftb= data[B]);

  1354.         put_bits(&s->pb, 8, 0);

  1355. 

  1356.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1357.         encode_bgr_bitstream(s, width-1);

  1358. 

  1359.         for(y=1; y<s->height; y++){

  1360.             uint8_t *dst = data + y*stride;

  1361.             if(s->predictor == PLANE && s->interlaced < y){

  1362.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1363.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1364.             }else{

  1365.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1366.             }

  1367.             encode_bgr_bitstream(s, width);

  1368.         }

  1369.     }else{

  1370.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1371.     }

  1372.     emms_c();

  1373. 

  1374.     size+= (put_bits_count(&s->pb)+31)/8;

  1375.     put_bits(&s->pb, 16, 0);

  1376.     put_bits(&s->pb, 15, 0);

  1377.     size/= 4;

  1378. 

  1379.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1380.         int j;

  1381.         char *p= avctx->stats_out;

  1382.         char *end= p + 1024*30;

  1383.         for(i=0; i<3; i++){

  1384.             for(j=0; j<256; j++){

  1385.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1386.                 p+= strlen(p);

  1387.                 s->stats[i][j]= 0;

  1388.             }

  1389.             snprintf(p, end-p, "\n");

  1390.             p++;

  1391.         }

  1392.     } else

  1393.         avctx->stats_out[0] = '\0';

  1394.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1395.         flush_put_bits(&s->pb);

  1396.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1397.     }

  1398. 

  1399.     s->picture_number++;

  1400. 

  1401.     return size*4;

  1402. }

  1403. 

  1404. static av_cold int encode_end(AVCodecContext *avctx)

  1405. {

  1406.     HYuvContext *s = avctx->priv_data;

  1407. 

  1408.     common_end(s);

  1409. 

  1410.     av_freep(&avctx->extradata);

  1411.     av_freep(&avctx->stats_out);

  1412. 

  1413.     return 0;

  1414. }

  1415. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1416. 

  1417. #if CONFIG_HUFFYUV_DECODER

  1418. AVCodec huffyuv_decoder = {

  1419.     "huffyuv",

  1420.     AVMEDIA_TYPE_VIDEO,

  1421.     CODEC_ID_HUFFYUV,

  1422.     sizeof(HYuvContext),

  1423.     decode_init,

  1424.     NULL,

  1425.     decode_end,

  1426.     decode_frame,

  1427.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1428.     NULL,

  1429.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1430. };

  1431. #endif

  1432. 

  1433. #if CONFIG_FFVHUFF_DECODER

  1434. AVCodec ffvhuff_decoder = {

  1435.     "ffvhuff",

  1436.     AVMEDIA_TYPE_VIDEO,

  1437.     CODEC_ID_FFVHUFF,

  1438.     sizeof(HYuvContext),

  1439.     decode_init,

  1440.     NULL,

  1441.     decode_end,

  1442.     decode_frame,

  1443.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1444.     NULL,

  1445.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1446. };

  1447. #endif

  1448. 

  1449. #if CONFIG_HUFFYUV_ENCODER

  1450. AVCodec huffyuv_encoder = {

  1451.     "huffyuv",

  1452.     AVMEDIA_TYPE_VIDEO,

  1453.     CODEC_ID_HUFFYUV,

  1454.     sizeof(HYuvContext),

  1455.     encode_init,

  1456.     encode_frame,

  1457.     encode_end,

  1458.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1459.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1460. };

  1461. #endif

  1462. 

  1463. #if CONFIG_FFVHUFF_ENCODER

  1464. AVCodec ffvhuff_encoder = {

  1465.     "ffvhuff",

  1466.     AVMEDIA_TYPE_VIDEO,

  1467.     CODEC_ID_FFVHUFF,

  1468.     sizeof(HYuvContext),

  1469.     encode_init,

  1470.     encode_frame,

  1471.     encode_end,

  1472.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1473.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1474. };

  1475. #endif