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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 Libav.

  10.  *

  11.  * Libav 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.  * Libav 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 Libav; if not, write to the Free Software

  23.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  24.  */

  25. 

  26. /**

  27.  * @file

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "get_bits.h"

  33. #include "put_bits.h"

  34. #include "dsputil.h"

  35. #include "thread.h"

  36. 

  37. #define VLC_BITS 11

  38. 

  39. #if HAVE_BIGENDIAN

  40. #define B 3

  41. #define G 2

  42. #define R 1

  43. #define A 0

  44. #else

  45. #define B 0

  46. #define G 1

  47. #define R 2

  48. #define A 3

  49. #endif

  50. 

  51. typedef enum Predictor{

  52.     LEFT= 0,

  53.     PLANE,

  54.     MEDIAN,

  55. } Predictor;

  56. 

  57. typedef struct HYuvContext{

  58.     AVCodecContext *avctx;

  59.     Predictor predictor;

  60.     GetBitContext gb;

  61.     PutBitContext pb;

  62.     int interlaced;

  63.     int decorrelate;

  64.     int bitstream_bpp;

  65.     int version;

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

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

  68.     int width, height;

  69.     int flags;

  70.     int context;

  71.     int picture_number;

  72.     int last_slice_end;

  73.     uint8_t *temp[3];

  74.     uint64_t stats[3][256];

  75.     uint8_t len[3][256];

  76.     uint32_t bits[3][256];

  77.     uint32_t pix_bgr_map[1<<VLC_BITS];

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

  79.     AVFrame picture;

  80.     uint8_t *bitstream_buffer;

  81.     unsigned int bitstream_buffer_size;

  82.     DSPContext dsp;

  83. }HYuvContext;

  84. 

  85. static const unsigned char classic_shift_luma[] = {

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

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

  88.   69,68, 0

  89. };

  90. 

  91. static const unsigned char classic_shift_chroma[] = {

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

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

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

  95. };

  96. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  114. };

  115. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  133. };

  134. 

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

  136.     int i;

  137.     if(w<32){

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

  139.             const int temp= src[i];

  140.             dst[i]= temp - left;

  141.             left= temp;

  142.         }

  143.         return left;

  144.     }else{

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

  146.             const int temp= src[i];

  147.             dst[i]= temp - left;

  148.             left= temp;

  149.         }

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

  151.         return src[w-1];

  152.     }

  153. }

  154. 

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

  156.     int i;

  157.     int r,g,b;

  158.     r= *red;

  159.     g= *green;

  160.     b= *blue;

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

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

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

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

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

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

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

  168.         r = rt;

  169.         g = gt;

  170.         b = bt;

  171.     }

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

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

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

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

  176. }

  177. 

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

  179.     int i, val, repeat;

  180. 

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

  182.         repeat= get_bits(gb, 3);

  183.         val   = get_bits(gb, 5);

  184.         if(repeat==0)

  185.             repeat= get_bits(gb, 8);

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

  187.         if(i+repeat > 256) {

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

  189.             return -1;

  190.         }

  191.         while (repeat--)

  192.             dst[i++] = val;

  193.     }

  194.     return 0;

  195. }

  196. 

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

  198.     int len, index;

  199.     uint32_t bits=0;

  200. 

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

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

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

  204.                 dst[index]= bits++;

  205.         }

  206.         if(bits & 1){

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

  208.             return -1;

  209.         }

  210.         bits >>= 1;

  211.     }

  212.     return 0;

  213. }

  214. 

  215. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  216. typedef struct {

  217.     uint64_t val;

  218.     int name;

  219. } HeapElem;

  220. 

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

  222. {

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

  224.         int child = root*2+1;

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

  226.             child++;

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

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

  229.             root = child;

  230.         } else

  231.             break;

  232.     }

  233. }

  234. 

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

  236.     HeapElem h[256];

  237.     int up[2*256];

  238.     int len[2*256];

  239.     int offset, i, next;

  240.     int size = 256;

  241. 

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

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

  244.             h[i].name = i;

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

  246.         }

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

  248.             heap_sift(h, i, size);

  249. 

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

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

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

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

  254.             h[0].val = INT64_MAX;

  255.             heap_sift(h, 0, size);

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

  257.             h[0].name = next;

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

  259.             heap_sift(h, 0, size);

  260.         }

  261. 

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

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

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

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

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

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

  268.         }

  269.         if(i==size) break;

  270.     }

  271. }

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

  273. 

  274. static void generate_joint_tables(HYuvContext *s){

  275.     uint16_t symbols[1<<VLC_BITS];

  276.     uint16_t bits[1<<VLC_BITS];

  277.     uint8_t len[1<<VLC_BITS];

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

  279.         int p, i, y, u;

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

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

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

  283.                 int limit = VLC_BITS - len0;

  284.                 if(limit <= 0)

  285.                     continue;

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

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

  288.                     if(len1 > limit)

  289.                         continue;

  290.                     len[i] = len0 + len1;

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

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

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

  294.                         i++;

  295.                 }

  296.             }

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

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

  299.         }

  300.     }else{

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

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

  303.         int p0 = s->decorrelate;

  304.         int p1 = !s->decorrelate;

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

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

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

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

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

  310.             int limit0 = VLC_BITS - len0;

  311.             if(limit0 < 2)

  312.                 continue;

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

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

  315.                 int limit1 = limit0 - len1;

  316.                 if(limit1 < 1)

  317.                     continue;

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

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

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

  321.                     if(len2 > limit1)

  322.                         continue;

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

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

  325.                     if(s->decorrelate){

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

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

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

  329.                     }else{

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

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

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

  333.                     }

  334.                     i++;

  335.                 }

  336.             }

  337.         }

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

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

  340.     }

  341. }

  342. 

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

  344.     GetBitContext gb;

  345.     int i;

  346. 

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

  348. 

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

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

  351.             return -1;

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

  353.             return -1;

  354.         }

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

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

  357.     }

  358. 

  359.     generate_joint_tables(s);

  360. 

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

  362. }

  363. 

  364. static int read_old_huffman_tables(HYuvContext *s){

  365. #if 1

  366.     GetBitContext gb;

  367.     int i;

  368. 

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

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

  371.         return -1;

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

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

  374.         return -1;

  375. 

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

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

  378. 

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

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

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

  382.     }

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

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

  385. 

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

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

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

  389.     }

  390. 

  391.     generate_joint_tables(s);

  392. 

  393.     return 0;

  394. #else

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

  396.     return -1;

  397. #endif

  398. }

  399. 

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

  401.     int i;

  402. 

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

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

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

  406.         }

  407.     }else{

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

  409.     }

  410. }

  411. 

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

  413.     HYuvContext *s = avctx->priv_data;

  414. 

  415.     s->avctx= avctx;

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

  417. 

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

  419. 

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

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

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

  423. 

  424.     return 0;

  425. }

  426. 

  427. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  428. static av_cold int decode_init(AVCodecContext *avctx)

  429. {

  430.     HYuvContext *s = avctx->priv_data;

  431. 

  432.     common_init(avctx);

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

  434. 

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

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

  437. 

  438. s->bgr32=1;

  439. //if(avctx->extradata)

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

  441.     if(avctx->extradata_size){

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

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

  444.         else

  445.             s->version=2;

  446.     }else

  447.         s->version=0;

  448. 

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

  450.         int method, interlace;

  451. 

  452.         if (avctx->extradata_size < 4)

  453.             return -1;

  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-4) < 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. 

  527. static av_cold int decode_init_thread_copy(AVCodecContext *avctx)

  528. {

  529.     HYuvContext *s = avctx->priv_data;

  530.     int i;

  531. 

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

  533.     alloc_temp(s);

  534. 

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

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

  537. 

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

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

  540.             return -1;

  541.     }else{

  542.         if(read_old_huffman_tables(s) < 0)

  543.             return -1;

  544.     }

  545. 

  546.     return 0;

  547. }

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

  549. 

  550. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  552.     int i;

  553.     int index= 0;

  554. 

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

  556.         int val= len[i];

  557.         int repeat=0;

  558. 

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

  560.             repeat++;

  561. 

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

  563.         if(repeat>7){

  564.             buf[index++]= val;

  565.             buf[index++]= repeat;

  566.         }else{

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

  568.         }

  569.     }

  570. 

  571.     return index;

  572. }

  573. 

  574. static av_cold int encode_init(AVCodecContext *avctx)

  575. {

  576.     HYuvContext *s = avctx->priv_data;

  577.     int i, j;

  578. 

  579.     common_init(avctx);

  580. 

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

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

  583.     s->version=2;

  584. 

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

  586. 

  587.     switch(avctx->pix_fmt){

  588.     case PIX_FMT_YUV420P:

  589.         s->bitstream_bpp= 12;

  590.         break;

  591.     case PIX_FMT_YUV422P:

  592.         s->bitstream_bpp= 16;

  593.         break;

  594.     case PIX_FMT_RGB32:

  595.         s->bitstream_bpp= 24;

  596.         break;

  597.     default:

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

  599.         return -1;

  600.     }

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

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

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

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

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

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

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

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

  609.             return -1;

  610.         }

  611.     }else s->context= 0;

  612. 

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

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

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

  616.             return -1;

  617.         }

  618.         if(avctx->context_model){

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

  620.             return -1;

  621.         }

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

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

  624.     }

  625. 

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

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

  628.         return -1;

  629.     }

  630. 

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

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

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

  634.     if(s->context)

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

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

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

  638. 

  639.     if(avctx->stats_in){

  640.         char *p= avctx->stats_in;

  641. 

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

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

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

  645. 

  646.         for(;;){

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

  648.                 char *next;

  649. 

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

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

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

  653.                     p=next;

  654.                 }

  655.             }

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

  657.         }

  658.     }else{

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

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

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

  662. 

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

  664.             }

  665.     }

  666. 

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

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

  669. 

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

  671.             return -1;

  672.         }

  673. 

  674.         s->avctx->extradata_size+=

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

  676.     }

  677. 

  678.     if(s->context){

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

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

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

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

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

  684.             }

  685.         }

  686.     }else{

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

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

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

  690.     }

  691. 

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

  693. 

  694.     alloc_temp(s);

  695. 

  696.     s->picture_number=0;

  697. 

  698.     return 0;

  699. }

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

  701. 

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

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

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

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

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

  707.         dst0 = code>>8;\

  708.         dst1 = code;\

  709.     }else{\

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

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

  712.     }\

  713. }

  714. 

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

  716.     int i;

  717. 

  718.     count/=2;

  719. 

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

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

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

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

  724.         }

  725.     }else{

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

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

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

  729.         }

  730.     }

  731. }

  732. 

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

  734.     int i;

  735. 

  736.     count/=2;

  737. 

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

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

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

  741.         }

  742.     }else{

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

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

  745.         }

  746.     }

  747. }

  748. 

  749. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  751.     int i;

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

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

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

  755. 

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

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

  758.         return -1;

  759.     }

  760. 

  761. #define LOAD4\

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

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

  764.             int u0 = u[i];\

  765.             int v0 = v[i];

  766. 

  767.     count/=2;

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

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

  770.             LOAD4;

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

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

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

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

  775.         }

  776.     }

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

  778.         return 0;

  779.     if(s->context){

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

  781.             LOAD4;

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

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

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

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

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

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

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

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

  790.         }

  791.     }else{

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

  793.             LOAD4;

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

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

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

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

  798.         }

  799.     }

  800.     return 0;

  801. }

  802. 

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

  804.     int i;

  805. 

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

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

  808.         return -1;

  809.     }

  810. 

  811. #define LOAD2\

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

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

  814. #define STAT2\

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

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

  817. #define WRITE2\

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

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

  820. 

  821.     count/=2;

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

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

  824.             LOAD2;

  825.             STAT2;

  826.         }

  827.     }

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

  829.         return 0;

  830. 

  831.     if(s->context){

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

  833.             LOAD2;

  834.             STAT2;

  835.             WRITE2;

  836.         }

  837.     }else{

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

  839.             LOAD2;

  840.             WRITE2;

  841.         }

  842.     }

  843.     return 0;

  844. }

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

  846. 

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

  848.     int i;

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

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

  851.         if(code != -1){

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

  853.         }else if(decorrelate){

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

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

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

  857.         }else{

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

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

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

  861.         }

  862.         if(alpha)

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

  864.     }

  865. }

  866. 

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

  868.     if(s->decorrelate){

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

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

  871.         else

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

  873.     }else{

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

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

  876.         else

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

  878.     }

  879. }

  880. 

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

  882.     int i;

  883. 

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

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

  886.         return -1;

  887.     }

  888. 

  889. #define LOAD3\

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

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

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

  893. #define STAT3\

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

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

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

  897. #define WRITE3\

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

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

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

  901. 

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

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

  904.             LOAD3;

  905.             STAT3;

  906.         }

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

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

  909.             LOAD3;

  910.             STAT3;

  911.             WRITE3;

  912.         }

  913.     }else{

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

  915.             LOAD3;

  916.             WRITE3;

  917.         }

  918.     }

  919.     return 0;

  920. }

  921. 

  922. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  924.     int h, cy;

  925.     int offset[4];

  926. 

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

  928.         return;

  929. 

  930.     h= y - s->last_slice_end;

  931.     y -= h;

  932. 

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

  934.         cy= y>>1;

  935.     }else{

  936.         cy= y;

  937.     }

  938. 

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

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

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

  942.     offset[3] = 0;

  943.     emms_c();

  944. 

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

  946. 

  947.     s->last_slice_end= y + h;

  948. }

  949. 

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

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

  952.     int buf_size = avpkt->size;

  953.     HYuvContext *s = avctx->priv_data;

  954.     const int width= s->width;

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

  956.     const int height= s->height;

  957.     int fake_ystride, fake_ustride, fake_vstride;

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

  959.     int table_size= 0;

  960. 

  961.     AVFrame *picture = data;

  962. 

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

  964.     if (!s->bitstream_buffer)

  965.         return AVERROR(ENOMEM);

  966. 

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

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

  969. 

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

  971.         ff_thread_release_buffer(avctx, p);

  972. 

  973.     p->reference= 0;

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

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

  976.         return -1;

  977.     }

  978. 

  979.     if(s->context){

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

  981.         if(table_size < 0)

  982.             return -1;

  983.     }

  984. 

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

  986.         return -1;

  987. 

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

  989. 

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

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

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

  993. 

  994.     s->last_slice_end= 0;

  995. 

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

  997.         int y, cy;

  998.         int lefty, leftu, leftv;

  999.         int lefttopy, lefttopu, lefttopv;

  1000. 

  1001.         if(s->yuy2){

  1002.             p->data[0][3]= get_bits(&s->gb, 8);

  1003.             p->data[0][2]= get_bits(&s->gb, 8);

  1004.             p->data[0][1]= get_bits(&s->gb, 8);

  1005.             p->data[0][0]= get_bits(&s->gb, 8);

  1006. 

  1007.             av_log(avctx, AV_LOG_ERROR, "YUY2 output is not implemented yet\n");

  1008.             return -1;

  1009.         }else{

  1010. 

  1011.             leftv= p->data[2][0]= get_bits(&s->gb, 8);

  1012.             lefty= p->data[0][1]= get_bits(&s->gb, 8);

  1013.             leftu= p->data[1][0]= get_bits(&s->gb, 8);

  1014.                    p->data[0][0]= get_bits(&s->gb, 8);

  1015. 

  1016.             switch(s->predictor){

  1017.             case LEFT:

  1018.             case PLANE:

  1019.                 decode_422_bitstream(s, width-2);

  1020.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1021.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1022.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1023.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1024.                 }

  1025. 

  1026.                 for(cy=y=1; y<s->height; y++,cy++){

  1027.                     uint8_t *ydst, *udst, *vdst;

  1028. 

  1029.                     if(s->bitstream_bpp==12){

  1030.                         decode_gray_bitstream(s, width);

  1031. 

  1032.                         ydst= p->data[0] + p->linesize[0]*y;

  1033. 

  1034.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1035.                         if(s->predictor == PLANE){

  1036.                             if(y>s->interlaced)

  1037.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1038.                         }

  1039.                         y++;

  1040.                         if(y>=s->height) break;

  1041.                     }

  1042. 

  1043.                     draw_slice(s, y);

  1044. 

  1045.                     ydst= p->data[0] + p->linesize[0]*y;

  1046.                     udst= p->data[1] + p->linesize[1]*cy;

  1047.                     vdst= p->data[2] + p->linesize[2]*cy;

  1048. 

  1049.                     decode_422_bitstream(s, width);

  1050.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1051.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1052.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1053.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1054.                     }

  1055.                     if(s->predictor == PLANE){

  1056.                         if(cy>s->interlaced){

  1057.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1058.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1059.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1060.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1061.                             }

  1062.                         }

  1063.                     }

  1064.                 }

  1065.                 draw_slice(s, height);

  1066. 

  1067.                 break;

  1068.             case MEDIAN:

  1069.                 /* first line except first 2 pixels is left predicted */

  1070.                 decode_422_bitstream(s, width-2);

  1071.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1072.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1073.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1074.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1075.                 }

  1076. 

  1077.                 cy=y=1;

  1078. 

  1079.                 /* second line is left predicted for interlaced case */

  1080.                 if(s->interlaced){

  1081.                     decode_422_bitstream(s, width);

  1082.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

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

  1084.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1085.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1086.                     }

  1087.                     y++; cy++;

  1088.                 }

  1089. 

  1090.                 /* next 4 pixels are left predicted too */

  1091.                 decode_422_bitstream(s, 4);

  1092.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1093.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1094.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1095.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1096.                 }

  1097. 

  1098.                 /* next line except the first 4 pixels is median predicted */

  1099.                 lefttopy= p->data[0][3];

  1100.                 decode_422_bitstream(s, width-4);

  1101.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1102.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1103.                     lefttopu= p->data[1][1];

  1104.                     lefttopv= p->data[2][1];

  1105.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1106.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1107.                 }

  1108.                 y++; cy++;

  1109. 

  1110.                 for(; y<height; y++,cy++){

  1111.                     uint8_t *ydst, *udst, *vdst;

  1112. 

  1113.                     if(s->bitstream_bpp==12){

  1114.                         while(2*cy > y){

  1115.                             decode_gray_bitstream(s, width);

  1116.                             ydst= p->data[0] + p->linesize[0]*y;

  1117.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1118.                             y++;

  1119.                         }

  1120.                         if(y>=height) break;

  1121.                     }

  1122.                     draw_slice(s, y);

  1123. 

  1124.                     decode_422_bitstream(s, width);

  1125. 

  1126.                     ydst= p->data[0] + p->linesize[0]*y;

  1127.                     udst= p->data[1] + p->linesize[1]*cy;

  1128.                     vdst= p->data[2] + p->linesize[2]*cy;

  1129. 

  1130.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1131.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1132.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1133.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1134.                     }

  1135.                 }

  1136. 

  1137.                 draw_slice(s, height);

  1138.                 break;

  1139.             }

  1140.         }

  1141.     }else{

  1142.         int y;

  1143.         int leftr, leftg, leftb, lefta;

  1144.         const int last_line= (height-1)*p->linesize[0];

  1145. 

  1146.         if(s->bitstream_bpp==32){

  1147.             lefta= p->data[0][last_line+A]= get_bits(&s->gb, 8);

  1148.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1149.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1150.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1151.         }else{

  1152.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1153.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1154.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1155.             lefta= p->data[0][last_line+A]= 255;

  1156.             skip_bits(&s->gb, 8);

  1157.         }

  1158. 

  1159.         if(s->bgr32){

  1160.             switch(s->predictor){

  1161.             case LEFT:

  1162.             case PLANE:

  1163.                 decode_bgr_bitstream(s, width-1);

  1164.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1165. 

  1166.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1167.                     decode_bgr_bitstream(s, width);

  1168. 

  1169.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1170.                     if(s->predictor == PLANE){

  1171.                         if(s->bitstream_bpp!=32) lefta=0;

  1172.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1173.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1174.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1175.                         }

  1176.                     }

  1177.                 }

  1178.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1179.                 break;

  1180.             default:

  1181.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1182.             }

  1183.         }else{

  1184. 

  1185.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1186.             return -1;

  1187.         }

  1188.     }

  1189.     emms_c();

  1190. 

  1191.     *picture= *p;

  1192.     *data_size = sizeof(AVFrame);

  1193. 

  1194.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1195. }

  1196. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1197. 

  1198. static int common_end(HYuvContext *s){

  1199.     int i;

  1200. 

  1201.     for(i=0; i<3; i++){

  1202.         av_freep(&s->temp[i]);

  1203.     }

  1204.     return 0;

  1205. }

  1206. 

  1207. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1208. static av_cold int decode_end(AVCodecContext *avctx)

  1209. {

  1210.     HYuvContext *s = avctx->priv_data;

  1211.     int i;

  1212. 

  1213.     if (s->picture.data[0])

  1214.         avctx->release_buffer(avctx, &s->picture);

  1215. 

  1216.     common_end(s);

  1217.     av_freep(&s->bitstream_buffer);

  1218. 

  1219.     for(i=0; i<6; i++){

  1220.         free_vlc(&s->vlc[i]);

  1221.     }

  1222. 

  1223.     return 0;

  1224. }

  1225. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1226. 

  1227. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1228. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1229.     HYuvContext *s = avctx->priv_data;

  1230.     AVFrame *pict = data;

  1231.     const int width= s->width;

  1232.     const int width2= s->width>>1;

  1233.     const int height= s->height;

  1234.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1235.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1236.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1237.     AVFrame * const p= &s->picture;

  1238.     int i, j, size=0;

  1239. 

  1240.     *p = *pict;

  1241.     p->pict_type= AV_PICTURE_TYPE_I;

  1242.     p->key_frame= 1;

  1243. 

  1244.     if(s->context){

  1245.         for(i=0; i<3; i++){

  1246.             generate_len_table(s->len[i], s->stats[i]);

  1247.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1248.                 return -1;

  1249.             size+= store_table(s, s->len[i], &buf[size]);

  1250.         }

  1251. 

  1252.         for(i=0; i<3; i++)

  1253.             for(j=0; j<256; j++)

  1254.                 s->stats[i][j] >>= 1;

  1255.     }

  1256. 

  1257.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1258. 

  1259.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1260.         int lefty, leftu, leftv, y, cy;

  1261. 

  1262.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1263.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1264.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1265.         put_bits(&s->pb, 8,        p->data[0][0]);

  1266. 

  1267.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1268.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1269.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1270. 

  1271.         encode_422_bitstream(s, 2, width-2);

  1272. 

  1273.         if(s->predictor==MEDIAN){

  1274.             int lefttopy, lefttopu, lefttopv;

  1275.             cy=y=1;

  1276.             if(s->interlaced){

  1277.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1278.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1279.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1280. 

  1281.                 encode_422_bitstream(s, 0, width);

  1282.                 y++; cy++;

  1283.             }

  1284. 

  1285.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1286.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1287.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1288. 

  1289.             encode_422_bitstream(s, 0, 4);

  1290. 

  1291.             lefttopy= p->data[0][3];

  1292.             lefttopu= p->data[1][1];

  1293.             lefttopv= p->data[2][1];

  1294.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1295.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

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

  1297.             encode_422_bitstream(s, 0, width-4);

  1298.             y++; cy++;

  1299. 

  1300.             for(; y<height; y++,cy++){

  1301.                 uint8_t *ydst, *udst, *vdst;

  1302. 

  1303.                 if(s->bitstream_bpp==12){

  1304.                     while(2*cy > y){

  1305.                         ydst= p->data[0] + p->linesize[0]*y;

  1306.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1307.                         encode_gray_bitstream(s, width);

  1308.                         y++;

  1309.                     }

  1310.                     if(y>=height) break;

  1311.                 }

  1312.                 ydst= p->data[0] + p->linesize[0]*y;

  1313.                 udst= p->data[1] + p->linesize[1]*cy;

  1314.                 vdst= p->data[2] + p->linesize[2]*cy;

  1315. 

  1316.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1317.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1318.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1319. 

  1320.                 encode_422_bitstream(s, 0, width);

  1321.             }

  1322.         }else{

  1323.             for(cy=y=1; y<height; y++,cy++){

  1324.                 uint8_t *ydst, *udst, *vdst;

  1325. 

  1326.                 /* encode a luma only line & y++ */

  1327.                 if(s->bitstream_bpp==12){

  1328.                     ydst= p->data[0] + p->linesize[0]*y;

  1329. 

  1330.                     if(s->predictor == PLANE && s->interlaced < y){

  1331.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1332. 

  1333.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1334.                     }else{

  1335.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1336.                     }

  1337.                     encode_gray_bitstream(s, width);

  1338.                     y++;

  1339.                     if(y>=height) break;

  1340.                 }

  1341. 

  1342.                 ydst= p->data[0] + p->linesize[0]*y;

  1343.                 udst= p->data[1] + p->linesize[1]*cy;

  1344.                 vdst= p->data[2] + p->linesize[2]*cy;

  1345. 

  1346.                 if(s->predictor == PLANE && s->interlaced < cy){

  1347.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1348.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1349.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1350. 

  1351.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1352.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1353.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1354.                 }else{

  1355.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1356.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1357.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1358.                 }

  1359. 

  1360.                 encode_422_bitstream(s, 0, width);

  1361.             }

  1362.         }

  1363.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1364.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1365.         const int stride = -p->linesize[0];

  1366.         const int fake_stride = -fake_ystride;

  1367.         int y;

  1368.         int leftr, leftg, leftb;

  1369. 

  1370.         put_bits(&s->pb, 8, leftr= data[R]);

  1371.         put_bits(&s->pb, 8, leftg= data[G]);

  1372.         put_bits(&s->pb, 8, leftb= data[B]);

  1373.         put_bits(&s->pb, 8, 0);

  1374. 

  1375.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1376.         encode_bgr_bitstream(s, width-1);

  1377. 

  1378.         for(y=1; y<s->height; y++){

  1379.             uint8_t *dst = data + y*stride;

  1380.             if(s->predictor == PLANE && s->interlaced < y){

  1381.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1382.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1383.             }else{

  1384.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1385.             }

  1386.             encode_bgr_bitstream(s, width);

  1387.         }

  1388.     }else{

  1389.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1390.     }

  1391.     emms_c();

  1392. 

  1393.     size+= (put_bits_count(&s->pb)+31)/8;

  1394.     put_bits(&s->pb, 16, 0);

  1395.     put_bits(&s->pb, 15, 0);

  1396.     size/= 4;

  1397. 

  1398.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1399.         int j;

  1400.         char *p= avctx->stats_out;

  1401.         char *end= p + 1024*30;

  1402.         for(i=0; i<3; i++){

  1403.             for(j=0; j<256; j++){

  1404.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1405.                 p+= strlen(p);

  1406.                 s->stats[i][j]= 0;

  1407.             }

  1408.             snprintf(p, end-p, "\n");

  1409.             p++;

  1410.         }

  1411.     } else

  1412.         avctx->stats_out[0] = '\0';

  1413.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1414.         flush_put_bits(&s->pb);

  1415.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1416.     }

  1417. 

  1418.     s->picture_number++;

  1419. 

  1420.     return size*4;

  1421. }

  1422. 

  1423. static av_cold int encode_end(AVCodecContext *avctx)

  1424. {

  1425.     HYuvContext *s = avctx->priv_data;

  1426. 

  1427.     common_end(s);

  1428. 

  1429.     av_freep(&avctx->extradata);

  1430.     av_freep(&avctx->stats_out);

  1431. 

  1432.     return 0;

  1433. }

  1434. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1435. 

  1436. #if CONFIG_HUFFYUV_DECODER

  1437. AVCodec ff_huffyuv_decoder = {

  1438.     "huffyuv",

  1439.     AVMEDIA_TYPE_VIDEO,

  1440.     CODEC_ID_HUFFYUV,

  1441.     sizeof(HYuvContext),

  1442.     decode_init,

  1443.     NULL,

  1444.     decode_end,

  1445.     decode_frame,

  1446.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1447.     NULL,

  1448.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1449.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1450. };

  1451. #endif

  1452. 

  1453. #if CONFIG_FFVHUFF_DECODER

  1454. AVCodec ff_ffvhuff_decoder = {

  1455.     "ffvhuff",

  1456.     AVMEDIA_TYPE_VIDEO,

  1457.     CODEC_ID_FFVHUFF,

  1458.     sizeof(HYuvContext),

  1459.     decode_init,

  1460.     NULL,

  1461.     decode_end,

  1462.     decode_frame,

  1463.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1464.     NULL,

  1465.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1466.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1467. };

  1468. #endif

  1469. 

  1470. #if CONFIG_HUFFYUV_ENCODER

  1471. AVCodec ff_huffyuv_encoder = {

  1472.     "huffyuv",

  1473.     AVMEDIA_TYPE_VIDEO,

  1474.     CODEC_ID_HUFFYUV,

  1475.     sizeof(HYuvContext),

  1476.     encode_init,

  1477.     encode_frame,

  1478.     encode_end,

  1479.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1480.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1481. };

  1482. #endif

  1483. 

  1484. #if CONFIG_FFVHUFF_ENCODER

  1485. AVCodec ff_ffvhuff_encoder = {

  1486.     "ffvhuff",

  1487.     AVMEDIA_TYPE_VIDEO,

  1488.     CODEC_ID_FFVHUFF,

  1489.     sizeof(HYuvContext),

  1490.     encode_init,

  1491.     encode_frame,

  1492.     encode_end,

  1493.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1494.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1495. };

  1496. #endif