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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 libavcodec/huffyuv.c

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

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

  457.         s->predictor= method&63;

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

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

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

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

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

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

  464. 

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

  466.             return -1;

  467.     }else{

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

  469.         case 1:

  470.             s->predictor= LEFT;

  471.             s->decorrelate= 0;

  472.             break;

  473.         case 2:

  474.             s->predictor= LEFT;

  475.             s->decorrelate= 1;

  476.             break;

  477.         case 3:

  478.             s->predictor= PLANE;

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

  480.             break;

  481.         case 4:

  482.             s->predictor= MEDIAN;

  483.             s->decorrelate= 0;

  484.             break;

  485.         default:

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

  487.             s->decorrelate= 0;

  488.             break;

  489.         }

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

  491.         s->context= 0;

  492. 

  493.         if(read_old_huffman_tables(s) < 0)

  494.             return -1;

  495.     }

  496. 

  497.     switch(s->bitstream_bpp){

  498.     case 12:

  499.         avctx->pix_fmt = PIX_FMT_YUV420P;

  500.         break;

  501.     case 16:

  502.         if(s->yuy2){

  503.             avctx->pix_fmt = PIX_FMT_YUYV422;

  504.         }else{

  505.             avctx->pix_fmt = PIX_FMT_YUV422P;

  506.         }

  507.         break;

  508.     case 24:

  509.     case 32:

  510.         if(s->bgr32){

  511.             avctx->pix_fmt = PIX_FMT_RGB32;

  512.         }else{

  513.             avctx->pix_fmt = PIX_FMT_BGR24;

  514.         }

  515.         break;

  516.     default:

  517.         assert(0);

  518.     }

  519. 

  520.     alloc_temp(s);

  521. 

  522. //    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);

  523. 

  524.     return 0;

  525. }

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

  527. 

  528. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  530.     int i;

  531.     int index= 0;

  532. 

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

  534.         int val= len[i];

  535.         int repeat=0;

  536. 

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

  538.             repeat++;

  539. 

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

  541.         if(repeat>7){

  542.             buf[index++]= val;

  543.             buf[index++]= repeat;

  544.         }else{

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

  546.         }

  547.     }

  548. 

  549.     return index;

  550. }

  551. 

  552. static av_cold int encode_init(AVCodecContext *avctx)

  553. {

  554.     HYuvContext *s = avctx->priv_data;

  555.     int i, j;

  556. 

  557.     common_init(avctx);

  558. 

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

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

  561.     s->version=2;

  562. 

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

  564. 

  565.     switch(avctx->pix_fmt){

  566.     case PIX_FMT_YUV420P:

  567.         s->bitstream_bpp= 12;

  568.         break;

  569.     case PIX_FMT_YUV422P:

  570.         s->bitstream_bpp= 16;

  571.         break;

  572.     case PIX_FMT_RGB32:

  573.         s->bitstream_bpp= 24;

  574.         break;

  575.     default:

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

  577.         return -1;

  578.     }

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

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

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

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

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

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

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

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

  587.             return -1;

  588.         }

  589.     }else s->context= 0;

  590. 

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

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

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

  594.             return -1;

  595.         }

  596.         if(avctx->context_model){

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

  598.             return -1;

  599.         }

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

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

  602.     }

  603. 

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

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

  606.         return -1;

  607.     }

  608. 

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

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

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

  612.     if(s->context)

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

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

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

  616. 

  617.     if(avctx->stats_in){

  618.         char *p= avctx->stats_in;

  619. 

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

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

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

  623. 

  624.         for(;;){

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

  626.                 char *next;

  627. 

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

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

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

  631.                     p=next;

  632.                 }

  633.             }

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

  635.         }

  636.     }else{

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

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

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

  640. 

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

  642.             }

  643.     }

  644. 

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

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

  647. 

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

  649.             return -1;

  650.         }

  651. 

  652.         s->avctx->extradata_size+=

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

  654.     }

  655. 

  656.     if(s->context){

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

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

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

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

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

  662.             }

  663.         }

  664.     }else{

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

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

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

  668.     }

  669. 

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

  671. 

  672.     alloc_temp(s);

  673. 

  674.     s->picture_number=0;

  675. 

  676.     return 0;

  677. }

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

  679. 

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

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

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

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

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

  685.         dst0 = code>>8;\

  686.         dst1 = code;\

  687.     }else{\

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

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

  690.     }\

  691. }

  692. 

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

  694.     int i;

  695. 

  696.     count/=2;

  697. 

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

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

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

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

  702.         }

  703.     }else{

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

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

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

  707.         }

  708.     }

  709. }

  710. 

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

  712.     int i;

  713. 

  714.     count/=2;

  715. 

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

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

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

  719.         }

  720.     }else{

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

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

  723.         }

  724.     }

  725. }

  726. 

  727. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  729.     int i;

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

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

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

  733. 

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

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

  736.         return -1;

  737.     }

  738. 

  739. #define LOAD4\

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

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

  742.             int u0 = u[i];\

  743.             int v0 = v[i];

  744. 

  745.     count/=2;

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

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

  748.             LOAD4;

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

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

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

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

  753.         }

  754.     }

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

  756.         return 0;

  757.     if(s->context){

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

  759.             LOAD4;

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

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

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

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

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

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

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

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

  768.         }

  769.     }else{

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

  771.             LOAD4;

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

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

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

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

  776.         }

  777.     }

  778.     return 0;

  779. }

  780. 

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

  782.     int i;

  783. 

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

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

  786.         return -1;

  787.     }

  788. 

  789. #define LOAD2\

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

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

  792. #define STAT2\

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

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

  795. #define WRITE2\

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

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

  798. 

  799.     count/=2;

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

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

  802.             LOAD2;

  803.             STAT2;

  804.         }

  805.     }

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

  807.         return 0;

  808. 

  809.     if(s->context){

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

  811.             LOAD2;

  812.             STAT2;

  813.             WRITE2;

  814.         }

  815.     }else{

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

  817.             LOAD2;

  818.             WRITE2;

  819.         }

  820.     }

  821.     return 0;

  822. }

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

  824. 

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

  826.     int i;

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

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

  829.         if(code != -1){

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

  831.         }else if(decorrelate){

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

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

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

  835.         }else{

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

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

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

  839.         }

  840.         if(alpha)

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

  842.     }

  843. }

  844. 

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

  846.     if(s->decorrelate){

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

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

  849.         else

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

  851.     }else{

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

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

  854.         else

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

  856.     }

  857. }

  858. 

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

  860.     int i;

  861. 

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

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

  864.         return -1;

  865.     }

  866. 

  867. #define LOAD3\

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

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

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

  871. #define STAT3\

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

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

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

  875. #define WRITE3\

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

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

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

  879. 

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

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

  882.             LOAD3;

  883.             STAT3;

  884.         }

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

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

  887.             LOAD3;

  888.             STAT3;

  889.             WRITE3;

  890.         }

  891.     }else{

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

  893.             LOAD3;

  894.             WRITE3;

  895.         }

  896.     }

  897.     return 0;

  898. }

  899. 

  900. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  902.     int h, cy;

  903.     int offset[4];

  904. 

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

  906.         return;

  907. 

  908.     h= y - s->last_slice_end;

  909.     y -= h;

  910. 

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

  912.         cy= y>>1;

  913.     }else{

  914.         cy= y;

  915.     }

  916. 

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

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

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

  920.     offset[3] = 0;

  921.     emms_c();

  922. 

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

  924. 

  925.     s->last_slice_end= y + h;

  926. }

  927. 

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

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

  930.     int buf_size = avpkt->size;

  931.     HYuvContext *s = avctx->priv_data;

  932.     const int width= s->width;

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

  934.     const int height= s->height;

  935.     int fake_ystride, fake_ustride, fake_vstride;

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

  937.     int table_size= 0;

  938. 

  939.     AVFrame *picture = data;

  940. 

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

  942.     if (!s->bitstream_buffer)

  943.         return AVERROR(ENOMEM);

  944. 

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

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

  947. 

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

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

  950. 

  951.     p->reference= 0;

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

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

  954.         return -1;

  955.     }

  956. 

  957.     if(s->context){

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

  959.         if(table_size < 0)

  960.             return -1;

  961.     }

  962. 

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

  964.         return -1;

  965. 

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

  967. 

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

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

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

  971. 

  972.     s->last_slice_end= 0;

  973. 

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

  975.         int y, cy;

  976.         int lefty, leftu, leftv;

  977.         int lefttopy, lefttopu, lefttopv;

  978. 

  979.         if(s->yuy2){

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

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

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

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

  984. 

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

  986.             return -1;

  987.         }else{

  988. 

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

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

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

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

  993. 

  994.             switch(s->predictor){

  995.             case LEFT:

  996.             case PLANE:

  997.                 decode_422_bitstream(s, width-2);

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

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

  1000.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1001.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1002.                 }

  1003. 

  1004.                 for(cy=y=1; y<s->height; y++,cy++){

  1005.                     uint8_t *ydst, *udst, *vdst;

  1006. 

  1007.                     if(s->bitstream_bpp==12){

  1008.                         decode_gray_bitstream(s, width);

  1009. 

  1010.                         ydst= p->data[0] + p->linesize[0]*y;

  1011. 

  1012.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1013.                         if(s->predictor == PLANE){

  1014.                             if(y>s->interlaced)

  1015.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1016.                         }

  1017.                         y++;

  1018.                         if(y>=s->height) break;

  1019.                     }

  1020. 

  1021.                     draw_slice(s, y);

  1022. 

  1023.                     ydst= p->data[0] + p->linesize[0]*y;

  1024.                     udst= p->data[1] + p->linesize[1]*cy;

  1025.                     vdst= p->data[2] + p->linesize[2]*cy;

  1026. 

  1027.                     decode_422_bitstream(s, width);

  1028.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1029.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1030.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1031.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1032.                     }

  1033.                     if(s->predictor == PLANE){

  1034.                         if(cy>s->interlaced){

  1035.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1036.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1037.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1038.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1039.                             }

  1040.                         }

  1041.                     }

  1042.                 }

  1043.                 draw_slice(s, height);

  1044. 

  1045.                 break;

  1046.             case MEDIAN:

  1047.                 /* first line except first 2 pixels is left predicted */

  1048.                 decode_422_bitstream(s, width-2);

  1049.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1050.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1051.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1052.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1053.                 }

  1054. 

  1055.                 cy=y=1;

  1056. 

  1057.                 /* second line is left predicted for interlaced case */

  1058.                 if(s->interlaced){

  1059.                     decode_422_bitstream(s, width);

  1060.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1061.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1062.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1063.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1064.                     }

  1065.                     y++; cy++;

  1066.                 }

  1067. 

  1068.                 /* next 4 pixels are left predicted too */

  1069.                 decode_422_bitstream(s, 4);

  1070.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1071.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1072.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1073.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1074.                 }

  1075. 

  1076.                 /* next line except the first 4 pixels is median predicted */

  1077.                 lefttopy= p->data[0][3];

  1078.                 decode_422_bitstream(s, width-4);

  1079.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1080.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1081.                     lefttopu= p->data[1][1];

  1082.                     lefttopv= p->data[2][1];

  1083.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1084.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1085.                 }

  1086.                 y++; cy++;

  1087. 

  1088.                 for(; y<height; y++,cy++){

  1089.                     uint8_t *ydst, *udst, *vdst;

  1090. 

  1091.                     if(s->bitstream_bpp==12){

  1092.                         while(2*cy > y){

  1093.                             decode_gray_bitstream(s, width);

  1094.                             ydst= p->data[0] + p->linesize[0]*y;

  1095.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1096.                             y++;

  1097.                         }

  1098.                         if(y>=height) break;

  1099.                     }

  1100.                     draw_slice(s, y);

  1101. 

  1102.                     decode_422_bitstream(s, width);

  1103. 

  1104.                     ydst= p->data[0] + p->linesize[0]*y;

  1105.                     udst= p->data[1] + p->linesize[1]*cy;

  1106.                     vdst= p->data[2] + p->linesize[2]*cy;

  1107. 

  1108.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1109.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1110.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1111.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1112.                     }

  1113.                 }

  1114. 

  1115.                 draw_slice(s, height);

  1116.                 break;

  1117.             }

  1118.         }

  1119.     }else{

  1120.         int y;

  1121.         int leftr, leftg, leftb, lefta;

  1122.         const int last_line= (height-1)*p->linesize[0];

  1123. 

  1124.         if(s->bitstream_bpp==32){

  1125.             lefta= p->data[0][last_line+A]= get_bits(&s->gb, 8);

  1126.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1127.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

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

  1129.         }else{

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

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

  1132.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1133.             lefta= p->data[0][last_line+A]= 255;

  1134.             skip_bits(&s->gb, 8);

  1135.         }

  1136. 

  1137.         if(s->bgr32){

  1138.             switch(s->predictor){

  1139.             case LEFT:

  1140.             case PLANE:

  1141.                 decode_bgr_bitstream(s, width-1);

  1142.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1143. 

  1144.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1145.                     decode_bgr_bitstream(s, width);

  1146. 

  1147.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1148.                     if(s->predictor == PLANE){

  1149.                         if(s->bitstream_bpp!=32) lefta=0;

  1150.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1151.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1152.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1153.                         }

  1154.                     }

  1155.                 }

  1156.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1157.                 break;

  1158.             default:

  1159.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1160.             }

  1161.         }else{

  1162. 

  1163.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1164.             return -1;

  1165.         }

  1166.     }

  1167.     emms_c();

  1168. 

  1169.     *picture= *p;

  1170.     *data_size = sizeof(AVFrame);

  1171. 

  1172.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1173. }

  1174. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1175. 

  1176. static int common_end(HYuvContext *s){

  1177.     int i;

  1178. 

  1179.     for(i=0; i<3; i++){

  1180.         av_freep(&s->temp[i]);

  1181.     }

  1182.     return 0;

  1183. }

  1184. 

  1185. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1186. static av_cold int decode_end(AVCodecContext *avctx)

  1187. {

  1188.     HYuvContext *s = avctx->priv_data;

  1189.     int i;

  1190. 

  1191.     if (s->picture.data[0])

  1192.         avctx->release_buffer(avctx, &s->picture);

  1193. 

  1194.     common_end(s);

  1195.     av_freep(&s->bitstream_buffer);

  1196. 

  1197.     for(i=0; i<6; i++){

  1198.         free_vlc(&s->vlc[i]);

  1199.     }

  1200. 

  1201.     return 0;

  1202. }

  1203. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1204. 

  1205. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1206. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1207.     HYuvContext *s = avctx->priv_data;

  1208.     AVFrame *pict = data;

  1209.     const int width= s->width;

  1210.     const int width2= s->width>>1;

  1211.     const int height= s->height;

  1212.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1213.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1214.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1215.     AVFrame * const p= &s->picture;

  1216.     int i, j, size=0;

  1217. 

  1218.     *p = *pict;

  1219.     p->pict_type= FF_I_TYPE;

  1220.     p->key_frame= 1;

  1221. 

  1222.     if(s->context){

  1223.         for(i=0; i<3; i++){

  1224.             generate_len_table(s->len[i], s->stats[i], 256);

  1225.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1226.                 return -1;

  1227.             size+= store_table(s, s->len[i], &buf[size]);

  1228.         }

  1229. 

  1230.         for(i=0; i<3; i++)

  1231.             for(j=0; j<256; j++)

  1232.                 s->stats[i][j] >>= 1;

  1233.     }

  1234. 

  1235.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1236. 

  1237.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1238.         int lefty, leftu, leftv, y, cy;

  1239. 

  1240.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1241.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1242.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

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

  1244. 

  1245.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1246.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1247.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1248. 

  1249.         encode_422_bitstream(s, 2, width-2);

  1250. 

  1251.         if(s->predictor==MEDIAN){

  1252.             int lefttopy, lefttopu, lefttopv;

  1253.             cy=y=1;

  1254.             if(s->interlaced){

  1255.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1256.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1257.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1258. 

  1259.                 encode_422_bitstream(s, 0, width);

  1260.                 y++; cy++;

  1261.             }

  1262. 

  1263.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1264.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1265.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1266. 

  1267.             encode_422_bitstream(s, 0, 4);

  1268. 

  1269.             lefttopy= p->data[0][3];

  1270.             lefttopu= p->data[1][1];

  1271.             lefttopv= p->data[2][1];

  1272.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1273.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1274.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1275.             encode_422_bitstream(s, 0, width-4);

  1276.             y++; cy++;

  1277. 

  1278.             for(; y<height; y++,cy++){

  1279.                 uint8_t *ydst, *udst, *vdst;

  1280. 

  1281.                 if(s->bitstream_bpp==12){

  1282.                     while(2*cy > y){

  1283.                         ydst= p->data[0] + p->linesize[0]*y;

  1284.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1285.                         encode_gray_bitstream(s, width);

  1286.                         y++;

  1287.                     }

  1288.                     if(y>=height) break;

  1289.                 }

  1290.                 ydst= p->data[0] + p->linesize[0]*y;

  1291.                 udst= p->data[1] + p->linesize[1]*cy;

  1292.                 vdst= p->data[2] + p->linesize[2]*cy;

  1293. 

  1294.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1295.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1296.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1297. 

  1298.                 encode_422_bitstream(s, 0, width);

  1299.             }

  1300.         }else{

  1301.             for(cy=y=1; y<height; y++,cy++){

  1302.                 uint8_t *ydst, *udst, *vdst;

  1303. 

  1304.                 /* encode a luma only line & y++ */

  1305.                 if(s->bitstream_bpp==12){

  1306.                     ydst= p->data[0] + p->linesize[0]*y;

  1307. 

  1308.                     if(s->predictor == PLANE && s->interlaced < y){

  1309.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1310. 

  1311.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1312.                     }else{

  1313.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1314.                     }

  1315.                     encode_gray_bitstream(s, width);

  1316.                     y++;

  1317.                     if(y>=height) break;

  1318.                 }

  1319. 

  1320.                 ydst= p->data[0] + p->linesize[0]*y;

  1321.                 udst= p->data[1] + p->linesize[1]*cy;

  1322.                 vdst= p->data[2] + p->linesize[2]*cy;

  1323. 

  1324.                 if(s->predictor == PLANE && s->interlaced < cy){

  1325.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1326.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1327.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1328. 

  1329.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1330.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1331.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1332.                 }else{

  1333.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1334.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1335.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1336.                 }

  1337. 

  1338.                 encode_422_bitstream(s, 0, width);

  1339.             }

  1340.         }

  1341.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1342.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1343.         const int stride = -p->linesize[0];

  1344.         const int fake_stride = -fake_ystride;

  1345.         int y;

  1346.         int leftr, leftg, leftb;

  1347. 

  1348.         put_bits(&s->pb, 8, leftr= data[R]);

  1349.         put_bits(&s->pb, 8, leftg= data[G]);

  1350.         put_bits(&s->pb, 8, leftb= data[B]);

  1351.         put_bits(&s->pb, 8, 0);

  1352. 

  1353.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1354.         encode_bgr_bitstream(s, width-1);

  1355. 

  1356.         for(y=1; y<s->height; y++){

  1357.             uint8_t *dst = data + y*stride;

  1358.             if(s->predictor == PLANE && s->interlaced < y){

  1359.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1360.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1361.             }else{

  1362.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1363.             }

  1364.             encode_bgr_bitstream(s, width);

  1365.         }

  1366.     }else{

  1367.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1368.     }

  1369.     emms_c();

  1370. 

  1371.     size+= (put_bits_count(&s->pb)+31)/8;

  1372.     put_bits(&s->pb, 16, 0);

  1373.     put_bits(&s->pb, 15, 0);

  1374.     size/= 4;

  1375. 

  1376.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1377.         int j;

  1378.         char *p= avctx->stats_out;

  1379.         char *end= p + 1024*30;

  1380.         for(i=0; i<3; i++){

  1381.             for(j=0; j<256; j++){

  1382.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1383.                 p+= strlen(p);

  1384.                 s->stats[i][j]= 0;

  1385.             }

  1386.             snprintf(p, end-p, "\n");

  1387.             p++;

  1388.         }

  1389.     } else

  1390.         avctx->stats_out[0] = '\0';

  1391.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1392.         flush_put_bits(&s->pb);

  1393.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1394.     }

  1395. 

  1396.     s->picture_number++;

  1397. 

  1398.     return size*4;

  1399. }

  1400. 

  1401. static av_cold int encode_end(AVCodecContext *avctx)

  1402. {

  1403.     HYuvContext *s = avctx->priv_data;

  1404. 

  1405.     common_end(s);

  1406. 

  1407.     av_freep(&avctx->extradata);

  1408.     av_freep(&avctx->stats_out);

  1409. 

  1410.     return 0;

  1411. }

  1412. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1413. 

  1414. #if CONFIG_HUFFYUV_DECODER

  1415. AVCodec huffyuv_decoder = {

  1416.     "huffyuv",

  1417.     CODEC_TYPE_VIDEO,

  1418.     CODEC_ID_HUFFYUV,

  1419.     sizeof(HYuvContext),

  1420.     decode_init,

  1421.     NULL,

  1422.     decode_end,

  1423.     decode_frame,

  1424.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1425.     NULL,

  1426.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1427. };

  1428. #endif

  1429. 

  1430. #if CONFIG_FFVHUFF_DECODER

  1431. AVCodec ffvhuff_decoder = {

  1432.     "ffvhuff",

  1433.     CODEC_TYPE_VIDEO,

  1434.     CODEC_ID_FFVHUFF,

  1435.     sizeof(HYuvContext),

  1436.     decode_init,

  1437.     NULL,

  1438.     decode_end,

  1439.     decode_frame,

  1440.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1441.     NULL,

  1442.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1443. };

  1444. #endif

  1445. 

  1446. #if CONFIG_HUFFYUV_ENCODER

  1447. AVCodec huffyuv_encoder = {

  1448.     "huffyuv",

  1449.     CODEC_TYPE_VIDEO,

  1450.     CODEC_ID_HUFFYUV,

  1451.     sizeof(HYuvContext),

  1452.     encode_init,

  1453.     encode_frame,

  1454.     encode_end,

  1455.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1456.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1457. };

  1458. #endif

  1459. 

  1460. #if CONFIG_FFVHUFF_ENCODER

  1461. AVCodec ffvhuff_encoder = {

  1462.     "ffvhuff",

  1463.     CODEC_TYPE_VIDEO,

  1464.     CODEC_ID_FFVHUFF,

  1465.     sizeof(HYuvContext),

  1466.     encode_init,

  1467.     encode_frame,

  1468.     encode_end,

  1469.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1470.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1471. };

  1472. #endif