falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
17508 Commits
32 Branches
821MB
Tree: 68e1794e3a
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '68e1794e3a'
${ noResults }
FFmpeg/libavcodec/huffyuv.c

1496 lines
47KB
Raw Blame History 

  1. /*

  2.  * huffyuv codec for libavcodec

  3.  *

  4.  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of

  7.  * the algorithm used

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

  11.  * FFmpeg is free software; you can redistribute it and/or

  12.  * modify it under the terms of the GNU Lesser General Public

  13.  * License as published by the Free Software Foundation; either

  14.  * version 2.1 of the License, or (at your option) any later version.

  15.  *

  16.  * FFmpeg is distributed in the hope that it will be useful,

  17.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  18.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  19.  * Lesser General Public License for more details.

  20.  *

  21.  * You should have received a copy of the GNU Lesser General Public

  22.  * License along with FFmpeg; if not, write to the Free Software

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

  24.  */

  25. 

  26. /**

  27.  * @file huffyuv.c

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "bitstream.h"

  33. #include "dsputil.h"

  34. #include "mathops.h"

  35. 

  36. #define VLC_BITS 11

  37. 

  38. #ifdef WORDS_BIGENDIAN

  39. #define B 3

  40. #define G 2

  41. #define R 1

  42. #else

  43. #define B 0

  44. #define G 1

  45. #define R 2

  46. #endif

  47. 

  48. typedef enum Predictor{

  49.     LEFT= 0,

  50.     PLANE,

  51.     MEDIAN,

  52. } Predictor;

  53. 

  54. typedef struct HYuvContext{

  55.     AVCodecContext *avctx;

  56.     Predictor predictor;

  57.     GetBitContext gb;

  58.     PutBitContext pb;

  59.     int interlaced;

  60.     int decorrelate;

  61.     int bitstream_bpp;

  62.     int version;

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

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

  65.     int width, height;

  66.     int flags;

  67.     int context;

  68.     int picture_number;

  69.     int last_slice_end;

  70.     uint8_t *temp[3];

  71.     uint64_t stats[3][256];

  72.     uint8_t len[3][256];

  73.     uint32_t bits[3][256];

  74.     uint32_t pix_bgr_map[1<<VLC_BITS];

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

  76.     AVFrame picture;

  77.     uint8_t *bitstream_buffer;

  78.     unsigned int bitstream_buffer_size;

  79.     DSPContext dsp;

  80. }HYuvContext;

  81. 

  82. static const unsigned char classic_shift_luma[] = {

  83.   34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,

  84.   16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,

  85.   69,68, 0

  86. };

  87. 

  88. static const unsigned char classic_shift_chroma[] = {

  89.   66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,

  90.   56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,

  91.   214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0

  92. };

  93. 

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

  95.     3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,

  96.    73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,

  97.    68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,

  98.    35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,

  99.    37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,

  100.    35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,

  101.    27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,

  102.    15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,

  103.    12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,

  104.    12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,

  105.    18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,

  106.    28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,

  107.    28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,

  108.    62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,

  109.    54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,

  110.    46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,

  111. };

  112. 

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

  114.     3,  1,  2,  2,  2,  2,  3,  3,  7,  5,  7,  5,  8,  6, 11,  9,

  115.     7, 13, 11, 10,  9,  8,  7,  5,  9,  7,  6,  4,  7,  5,  8,  7,

  116.    11,  8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,

  117.    43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,

  118.   143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,

  119.    80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,

  120.    17, 14,  5,  6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,

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

  122.     0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,

  123.   135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,

  124.    52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,

  125.    19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10,  9,  8, 36,

  126.     7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,

  127.    83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,

  128.    14, 16, 17, 18, 20, 21, 12, 14, 15,  9, 10,  6,  9,  6,  5,  8,

  129.     6, 12,  8, 10,  7,  9,  6,  4,  6,  2,  2,  3,  3,  3,  3,  2,

  130. };

  131. 

  132. static inline int add_left_prediction(uint8_t *dst, uint8_t *src, int w, int acc){

  133.     int i;

  134. 

  135.     for(i=0; i<w-1; i++){

  136.         acc+= src[i];

  137.         dst[i]= acc;

  138.         i++;

  139.         acc+= src[i];

  140.         dst[i]= acc;

  141.     }

  142. 

  143.     for(; i<w; i++){

  144.         acc+= src[i];

  145.         dst[i]= acc;

  146.     }

  147. 

  148.     return acc;

  149. }

  150. 

  151. static inline void add_median_prediction(uint8_t *dst, uint8_t *src1, uint8_t *diff, int w, int *left, int *left_top){

  152.     int i;

  153.     uint8_t l, lt;

  154. 

  155.     l= *left;

  156.     lt= *left_top;

  157. 

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

  159.         l= mid_pred(l, src1[i], (l + src1[i] - lt)&0xFF) + diff[i];

  160.         lt= src1[i];

  161.         dst[i]= l;

  162.     }

  163. 

  164.     *left= l;

  165.     *left_top= lt;

  166. }

  167. 

  168. static inline void add_left_prediction_bgr32(uint8_t *dst, uint8_t *src, int w, int *red, int *green, int *blue){

  169.     int i;

  170.     int r,g,b;

  171.     r= *red;

  172.     g= *green;

  173.     b= *blue;

  174. 

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

  176.         b+= src[4*i+B];

  177.         g+= src[4*i+G];

  178.         r+= src[4*i+R];

  179. 

  180.         dst[4*i+B]= b;

  181.         dst[4*i+G]= g;

  182.         dst[4*i+R]= r;

  183.     }

  184. 

  185.     *red= r;

  186.     *green= g;

  187.     *blue= b;

  188. }

  189. 

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

  191.     int i;

  192.     if(w<32){

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

  194.             const int temp= src[i];

  195.             dst[i]= temp - left;

  196.             left= temp;

  197.         }

  198.         return left;

  199.     }else{

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

  201.             const int temp= src[i];

  202.             dst[i]= temp - left;

  203.             left= temp;

  204.         }

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

  206.         return src[w-1];

  207.     }

  208. }

  209. 

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

  211.     int i;

  212.     int r,g,b;

  213.     r= *red;

  214.     g= *green;

  215.     b= *blue;

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

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

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

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

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

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

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

  223.         r = rt;

  224.         g = gt;

  225.         b = bt;

  226.     }

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

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

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

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

  231. }

  232. 

  233. static void read_len_table(uint8_t *dst, GetBitContext *gb){

  234.     int i, val, repeat;

  235. 

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

  237.         repeat= get_bits(gb, 3);

  238.         val   = get_bits(gb, 5);

  239.         if(repeat==0)

  240.             repeat= get_bits(gb, 8);

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

  242.         while (repeat--)

  243.             dst[i++] = val;

  244.     }

  245. }

  246. 

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

  248.     int len, index;

  249.     uint32_t bits=0;

  250. 

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

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

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

  254.                 dst[index]= bits++;

  255.         }

  256.         if(bits & 1){

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

  258.             return -1;

  259.         }

  260.         bits >>= 1;

  261.     }

  262.     return 0;

  263. }

  264. 

  265. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  266. typedef struct {

  267.     uint64_t val;

  268.     int name;

  269. } HeapElem;

  270. 

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

  272. {

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

  274.         int child = root*2+1;

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

  276.             child++;

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

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

  279.             root = child;

  280.         } else

  281.             break;

  282.     }

  283. }

  284. 

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

  286.     HeapElem h[size];

  287.     int up[2*size];

  288.     int len[2*size];

  289.     int offset, i, next;

  290. 

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

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

  293.             h[i].name = i;

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

  295.         }

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

  297.             heap_sift(h, i, size);

  298. 

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

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

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

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

  303.             h[0].val = INT64_MAX;

  304.             heap_sift(h, 0, size);

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

  306.             h[0].name = next;

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

  308.             heap_sift(h, 0, size);

  309.         }

  310. 

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

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

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

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

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

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

  317.         }

  318.         if(i==size) break;

  319.     }

  320. }

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

  322. 

  323. static void generate_joint_tables(HYuvContext *s){

  324.     uint16_t symbols[1<<VLC_BITS];

  325.     uint16_t bits[1<<VLC_BITS];

  326.     uint8_t len[1<<VLC_BITS];

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

  328.         int p, i, y, u;

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

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

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

  332.                 int limit = VLC_BITS - len0;

  333.                 if(limit <= 0)

  334.                     continue;

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

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

  337.                     if(len1 > limit)

  338.                         continue;

  339.                     len[i] = len0 + len1;

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

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

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

  343.                         i++;

  344.                 }

  345.             }

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

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

  348.         }

  349.     }else{

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

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

  352.         int p0 = s->decorrelate;

  353.         int p1 = !s->decorrelate;

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

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

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

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

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

  359.             int limit0 = VLC_BITS - len0;

  360.             if(limit0 < 2)

  361.                 continue;

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

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

  364.                 int limit1 = limit0 - len1;

  365.                 if(limit1 < 1)

  366.                     continue;

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

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

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

  370.                     if(len2 > limit1)

  371.                         continue;

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

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

  374.                     if(s->decorrelate){

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

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

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

  378.                     }else{

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

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

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

  382.                     }

  383.                     i++;

  384.                 }

  385.             }

  386.         }

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

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

  389.     }

  390. }

  391. 

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

  393.     GetBitContext gb;

  394.     int i;

  395. 

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

  397. 

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

  399.         read_len_table(s->len[i], &gb);

  400. 

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

  402.             return -1;

  403.         }

  404. #if 0

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

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

  407. }

  408. #endif

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

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

  411.     }

  412. 

  413.     generate_joint_tables(s);

  414. 

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

  416. }

  417. 

  418. static int read_old_huffman_tables(HYuvContext *s){

  419. #if 1

  420.     GetBitContext gb;

  421.     int i;

  422. 

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

  424.     read_len_table(s->len[0], &gb);

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

  426.     read_len_table(s->len[1], &gb);

  427. 

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

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

  430. 

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

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

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

  434.     }

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

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

  437. 

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

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

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

  441.     }

  442. 

  443.     generate_joint_tables(s);

  444. 

  445.     return 0;

  446. #else

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

  448.     return -1;

  449. #endif

  450. }

  451. 

  452. static void alloc_temp(HYuvContext *s){

  453.     int i;

  454. 

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

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

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

  458.         }

  459.     }else{

  460.         for(i=0; i<2; i++){

  461.             s->temp[i]= av_malloc(4*s->width + 16);

  462.         }

  463.     }

  464. }

  465. 

  466. static int common_init(AVCodecContext *avctx){

  467.     HYuvContext *s = avctx->priv_data;

  468. 

  469.     s->avctx= avctx;

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

  471. 

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

  473. 

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

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

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

  477. 

  478.     return 0;

  479. }

  480. 

  481. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  482. static av_cold int decode_init(AVCodecContext *avctx)

  483. {

  484.     HYuvContext *s = avctx->priv_data;

  485. 

  486.     common_init(avctx);

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

  488. 

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

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

  491. 

  492. s->bgr32=1;

  493. //if(avctx->extradata)

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

  495.     if(avctx->extradata_size){

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

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

  498.         else

  499.             s->version=2;

  500.     }else

  501.         s->version=0;

  502. 

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

  504.         int method, interlace;

  505. 

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

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

  508.         s->predictor= method&63;

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

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

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

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

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

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

  515. 

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

  517.             return -1;

  518.     }else{

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

  520.         case 1:

  521.             s->predictor= LEFT;

  522.             s->decorrelate= 0;

  523.             break;

  524.         case 2:

  525.             s->predictor= LEFT;

  526.             s->decorrelate= 1;

  527.             break;

  528.         case 3:

  529.             s->predictor= PLANE;

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

  531.             break;

  532.         case 4:

  533.             s->predictor= MEDIAN;

  534.             s->decorrelate= 0;

  535.             break;

  536.         default:

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

  538.             s->decorrelate= 0;

  539.             break;

  540.         }

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

  542.         s->context= 0;

  543. 

  544.         if(read_old_huffman_tables(s) < 0)

  545.             return -1;

  546.     }

  547. 

  548.     switch(s->bitstream_bpp){

  549.     case 12:

  550.         avctx->pix_fmt = PIX_FMT_YUV420P;

  551.         break;

  552.     case 16:

  553.         if(s->yuy2){

  554.             avctx->pix_fmt = PIX_FMT_YUYV422;

  555.         }else{

  556.             avctx->pix_fmt = PIX_FMT_YUV422P;

  557.         }

  558.         break;

  559.     case 24:

  560.     case 32:

  561.         if(s->bgr32){

  562.             avctx->pix_fmt = PIX_FMT_RGB32;

  563.         }else{

  564.             avctx->pix_fmt = PIX_FMT_BGR24;

  565.         }

  566.         break;

  567.     default:

  568.         assert(0);

  569.     }

  570. 

  571.     alloc_temp(s);

  572. 

  573. //    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);

  574. 

  575.     return 0;

  576. }

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

  578. 

  579. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  581.     int i;

  582.     int index= 0;

  583. 

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

  585.         int val= len[i];

  586.         int repeat=0;

  587. 

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

  589.             repeat++;

  590. 

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

  592.         if(repeat>7){

  593.             buf[index++]= val;

  594.             buf[index++]= repeat;

  595.         }else{

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

  597.         }

  598.     }

  599. 

  600.     return index;

  601. }

  602. 

  603. static av_cold int encode_init(AVCodecContext *avctx)

  604. {

  605.     HYuvContext *s = avctx->priv_data;

  606.     int i, j;

  607. 

  608.     common_init(avctx);

  609. 

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

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

  612.     s->version=2;

  613. 

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

  615. 

  616.     switch(avctx->pix_fmt){

  617.     case PIX_FMT_YUV420P:

  618.         s->bitstream_bpp= 12;

  619.         break;

  620.     case PIX_FMT_YUV422P:

  621.         s->bitstream_bpp= 16;

  622.         break;

  623.     case PIX_FMT_RGB32:

  624.         s->bitstream_bpp= 24;

  625.         break;

  626.     default:

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

  628.         return -1;

  629.     }

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

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

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

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

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

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

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

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

  638.             return -1;

  639.         }

  640.     }else s->context= 0;

  641. 

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

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

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

  645.             return -1;

  646.         }

  647.         if(avctx->context_model){

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

  649.             return -1;

  650.         }

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

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

  653.     }

  654. 

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

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

  657.         return -1;

  658.     }

  659. 

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

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

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

  663.     if(s->context)

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

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

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

  667. 

  668.     if(avctx->stats_in){

  669.         char *p= avctx->stats_in;

  670. 

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

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

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

  674. 

  675.         for(;;){

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

  677.                 char *next;

  678. 

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

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

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

  682.                     p=next;

  683.                 }

  684.             }

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

  686.         }

  687.     }else{

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

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

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

  691. 

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

  693.             }

  694.     }

  695. 

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

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

  698. 

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

  700.             return -1;

  701.         }

  702. 

  703.         s->avctx->extradata_size+=

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

  705.     }

  706. 

  707.     if(s->context){

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

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

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

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

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

  713.             }

  714.         }

  715.     }else{

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

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

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

  719.     }

  720. 

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

  722. 

  723.     alloc_temp(s);

  724. 

  725.     s->picture_number=0;

  726. 

  727.     return 0;

  728. }

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

  730. 

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

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

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

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

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

  736.         dst0 = code>>8;\

  737.         dst1 = code;\

  738.     }else{\

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

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

  741.     }\

  742. }

  743. 

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

  745.     int i;

  746. 

  747.     count/=2;

  748. 

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

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

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

  752.     }

  753. }

  754. 

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

  756.     int i;

  757. 

  758.     count/=2;

  759. 

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

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

  762.     }

  763. }

  764. 

  765. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  767.     int i;

  768. 

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

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

  771.         return -1;

  772.     }

  773. 

  774. #define LOAD4\

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

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

  777.             int u0 = s->temp[1][i];\

  778.             int v0 = s->temp[2][i];

  779. 

  780.     count/=2;

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

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

  783.             LOAD4;

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

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

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

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

  788.         }

  789.     }

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

  791.         return 0;

  792.     if(s->context){

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

  794.             LOAD4;

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

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

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

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

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

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

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

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

  803.         }

  804.     }else{

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

  806.             LOAD4;

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

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

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

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

  811.         }

  812.     }

  813.     return 0;

  814. }

  815. 

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

  817.     int i;

  818. 

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

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

  821.         return -1;

  822.     }

  823. 

  824. #define LOAD2\

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

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

  827. #define STAT2\

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

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

  830. #define WRITE2\

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

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

  833. 

  834.     count/=2;

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

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

  837.             LOAD2;

  838.             STAT2;

  839.         }

  840.     }

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

  842.         return 0;

  843. 

  844.     if(s->context){

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

  846.             LOAD2;

  847.             STAT2;

  848.             WRITE2;

  849.         }

  850.     }else{

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

  852.             LOAD2;

  853.             WRITE2;

  854.         }

  855.     }

  856.     return 0;

  857. }

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

  859. 

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

  861.     int i;

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

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

  864.         if(code != -1){

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

  866.         }else if(decorrelate){

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

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

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

  870.         }else{

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

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

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

  874.         }

  875.         if(alpha)

  876.             get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?!

  877.     }

  878. }

  879. 

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

  881.     if(s->decorrelate){

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

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

  884.         else

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

  886.     }else{

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

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

  889.         else

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

  891.     }

  892. }

  893. 

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

  895.     int i;

  896. 

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

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

  899.         return -1;

  900.     }

  901. 

  902. #define LOAD3\

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

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

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

  906. #define STAT3\

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

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

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

  910. #define WRITE3\

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

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

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

  914. 

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

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

  917.             LOAD3;

  918.             STAT3;

  919.         }

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

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

  922.             LOAD3;

  923.             STAT3;

  924.             WRITE3;

  925.         }

  926.     }else{

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

  928.             LOAD3;

  929.             WRITE3;

  930.         }

  931.     }

  932.     return 0;

  933. }

  934. 

  935. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  937.     int h, cy;

  938.     int offset[4];

  939. 

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

  941.         return;

  942. 

  943.     h= y - s->last_slice_end;

  944.     y -= h;

  945. 

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

  947.         cy= y>>1;

  948.     }else{

  949.         cy= y;

  950.     }

  951. 

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

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

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

  955.     offset[3] = 0;

  956.     emms_c();

  957. 

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

  959. 

  960.     s->last_slice_end= y + h;

  961. }

  962. 

  963. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size){

  964.     HYuvContext *s = avctx->priv_data;

  965.     const int width= s->width;

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

  967.     const int height= s->height;

  968.     int fake_ystride, fake_ustride, fake_vstride;

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

  970.     int table_size= 0;

  971. 

  972.     AVFrame *picture = data;

  973. 

  974.     s->bitstream_buffer= av_fast_realloc(s->bitstream_buffer, &s->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  975. 

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

  977. 

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

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

  980. 

  981.     p->reference= 0;

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

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

  984.         return -1;

  985.     }

  986. 

  987.     if(s->context){

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

  989.         if(table_size < 0)

  990.             return -1;

  991.     }

  992. 

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

  994.         return -1;

  995. 

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

  997. 

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

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

  1000.     fake_vstride= s->interlaced ? p->linesize[2]*2  : p->linesize[2];

  1001. 

  1002.     s->last_slice_end= 0;

  1003. 

  1004.     if(s->bitstream_bpp<24){

  1005.         int y, cy;

  1006.         int lefty, leftu, leftv;

  1007.         int lefttopy, lefttopu, lefttopv;

  1008. 

  1009.         if(s->yuy2){

  1010.             p->data[0][3]= get_bits(&s->gb, 8);

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

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

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

  1014. 

  1015.             av_log(avctx, AV_LOG_ERROR, "YUY2 output is not implemented yet\n");

  1016.             return -1;

  1017.         }else{

  1018. 

  1019.             leftv= p->data[2][0]= get_bits(&s->gb, 8);

  1020.             lefty= p->data[0][1]= get_bits(&s->gb, 8);

  1021.             leftu= p->data[1][0]= get_bits(&s->gb, 8);

  1022.                    p->data[0][0]= get_bits(&s->gb, 8);

  1023. 

  1024.             switch(s->predictor){

  1025.             case LEFT:

  1026.             case PLANE:

  1027.                 decode_422_bitstream(s, width-2);

  1028.                 lefty= add_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

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

  1030.                     leftu= add_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1031.                     leftv= add_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1032.                 }

  1033. 

  1034.                 for(cy=y=1; y<s->height; y++,cy++){

  1035.                     uint8_t *ydst, *udst, *vdst;

  1036. 

  1037.                     if(s->bitstream_bpp==12){

  1038.                         decode_gray_bitstream(s, width);

  1039. 

  1040.                         ydst= p->data[0] + p->linesize[0]*y;

  1041. 

  1042.                         lefty= add_left_prediction(ydst, s->temp[0], width, lefty);

  1043.                         if(s->predictor == PLANE){

  1044.                             if(y>s->interlaced)

  1045.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1046.                         }

  1047.                         y++;

  1048.                         if(y>=s->height) break;

  1049.                     }

  1050. 

  1051.                     draw_slice(s, y);

  1052. 

  1053.                     ydst= p->data[0] + p->linesize[0]*y;

  1054.                     udst= p->data[1] + p->linesize[1]*cy;

  1055.                     vdst= p->data[2] + p->linesize[2]*cy;

  1056. 

  1057.                     decode_422_bitstream(s, width);

  1058.                     lefty= add_left_prediction(ydst, s->temp[0], width, lefty);

  1059.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1060.                         leftu= add_left_prediction(udst, s->temp[1], width2, leftu);

  1061.                         leftv= add_left_prediction(vdst, s->temp[2], width2, leftv);

  1062.                     }

  1063.                     if(s->predictor == PLANE){

  1064.                         if(cy>s->interlaced){

  1065.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1066.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1067.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1068.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1069.                             }

  1070.                         }

  1071.                     }

  1072.                 }

  1073.                 draw_slice(s, height);

  1074. 

  1075.                 break;

  1076.             case MEDIAN:

  1077.                 /* first line except first 2 pixels is left predicted */

  1078.                 decode_422_bitstream(s, width-2);

  1079.                 lefty= add_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

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

  1081.                     leftu= add_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1082.                     leftv= add_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1083.                 }

  1084. 

  1085.                 cy=y=1;

  1086. 

  1087.                 /* second line is left predicted for interlaced case */

  1088.                 if(s->interlaced){

  1089.                     decode_422_bitstream(s, width);

  1090.                     lefty= add_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1091.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1092.                         leftu= add_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1093.                         leftv= add_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1094.                     }

  1095.                     y++; cy++;

  1096.                 }

  1097. 

  1098.                 /* next 4 pixels are left predicted too */

  1099.                 decode_422_bitstream(s, 4);

  1100.                 lefty= add_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1101.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1102.                     leftu= add_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1103.                     leftv= add_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1104.                 }

  1105. 

  1106.                 /* next line except the first 4 pixels is median predicted */

  1107.                 lefttopy= p->data[0][3];

  1108.                 decode_422_bitstream(s, width-4);

  1109.                 add_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1110.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1111.                     lefttopu= p->data[1][1];

  1112.                     lefttopv= p->data[2][1];

  1113.                     add_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1114.                     add_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1115.                 }

  1116.                 y++; cy++;

  1117. 

  1118.                 for(; y<height; y++,cy++){

  1119.                     uint8_t *ydst, *udst, *vdst;

  1120. 

  1121.                     if(s->bitstream_bpp==12){

  1122.                         while(2*cy > y){

  1123.                             decode_gray_bitstream(s, width);

  1124.                             ydst= p->data[0] + p->linesize[0]*y;

  1125.                             add_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1126.                             y++;

  1127.                         }

  1128.                         if(y>=height) break;

  1129.                     }

  1130.                     draw_slice(s, y);

  1131. 

  1132.                     decode_422_bitstream(s, width);

  1133. 

  1134.                     ydst= p->data[0] + p->linesize[0]*y;

  1135.                     udst= p->data[1] + p->linesize[1]*cy;

  1136.                     vdst= p->data[2] + p->linesize[2]*cy;

  1137. 

  1138.                     add_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1139.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1140.                         add_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1141.                         add_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1142.                     }

  1143.                 }

  1144. 

  1145.                 draw_slice(s, height);

  1146.                 break;

  1147.             }

  1148.         }

  1149.     }else{

  1150.         int y;

  1151.         int leftr, leftg, leftb;

  1152.         const int last_line= (height-1)*p->linesize[0];

  1153. 

  1154.         if(s->bitstream_bpp==32){

  1155.             skip_bits(&s->gb, 8);

  1156.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1157.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1158.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1159.         }else{

  1160.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1161.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1162.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1163.             skip_bits(&s->gb, 8);

  1164.         }

  1165. 

  1166.         if(s->bgr32){

  1167.             switch(s->predictor){

  1168.             case LEFT:

  1169.             case PLANE:

  1170.                 decode_bgr_bitstream(s, width-1);

  1171.                 add_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb);

  1172. 

  1173.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1174.                     decode_bgr_bitstream(s, width);

  1175. 

  1176.                     add_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb);

  1177.                     if(s->predictor == PLANE){

  1178.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1179.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1180.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1181.                         }

  1182.                     }

  1183.                 }

  1184.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1185.                 break;

  1186.             default:

  1187.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1188.             }

  1189.         }else{

  1190. 

  1191.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1192.             return -1;

  1193.         }

  1194.     }

  1195.     emms_c();

  1196. 

  1197.     *picture= *p;

  1198.     *data_size = sizeof(AVFrame);

  1199. 

  1200.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1201. }

  1202. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1203. 

  1204. static int common_end(HYuvContext *s){

  1205.     int i;

  1206. 

  1207.     for(i=0; i<3; i++){

  1208.         av_freep(&s->temp[i]);

  1209.     }

  1210.     return 0;

  1211. }

  1212. 

  1213. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1214. static av_cold int decode_end(AVCodecContext *avctx)

  1215. {

  1216.     HYuvContext *s = avctx->priv_data;

  1217.     int i;

  1218. 

  1219.     common_end(s);

  1220.     av_freep(&s->bitstream_buffer);

  1221. 

  1222.     for(i=0; i<6; i++){

  1223.         free_vlc(&s->vlc[i]);

  1224.     }

  1225. 

  1226.     return 0;

  1227. }

  1228. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1229. 

  1230. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1231. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1232.     HYuvContext *s = avctx->priv_data;

  1233.     AVFrame *pict = data;

  1234.     const int width= s->width;

  1235.     const int width2= s->width>>1;

  1236.     const int height= s->height;

  1237.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1238.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1239.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1240.     AVFrame * const p= &s->picture;

  1241.     int i, j, size=0;

  1242. 

  1243.     *p = *pict;

  1244.     p->pict_type= FF_I_TYPE;

  1245.     p->key_frame= 1;

  1246. 

  1247.     if(s->context){

  1248.         for(i=0; i<3; i++){

  1249.             generate_len_table(s->len[i], s->stats[i], 256);

  1250.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1251.                 return -1;

  1252.             size+= store_table(s, s->len[i], &buf[size]);

  1253.         }

  1254. 

  1255.         for(i=0; i<3; i++)

  1256.             for(j=0; j<256; j++)

  1257.                 s->stats[i][j] >>= 1;

  1258.     }

  1259. 

  1260.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1261. 

  1262.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1263.         int lefty, leftu, leftv, y, cy;

  1264. 

  1265.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1266.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1267.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1268.         put_bits(&s->pb, 8,        p->data[0][0]);

  1269. 

  1270.         lefty= sub_left_prediction(s, s->temp[0], p->data[0]+2, width-2 , lefty);

  1271.         leftu= sub_left_prediction(s, s->temp[1], p->data[1]+1, width2-1, leftu);

  1272.         leftv= sub_left_prediction(s, s->temp[2], p->data[2]+1, width2-1, leftv);

  1273. 

  1274.         encode_422_bitstream(s, width-2);

  1275. 

  1276.         if(s->predictor==MEDIAN){

  1277.             int lefttopy, lefttopu, lefttopv;

  1278.             cy=y=1;

  1279.             if(s->interlaced){

  1280.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1281.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1282.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1283. 

  1284.                 encode_422_bitstream(s, width);

  1285.                 y++; cy++;

  1286.             }

  1287. 

  1288.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1289.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1290.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1291. 

  1292.             encode_422_bitstream(s, 4);

  1293. 

  1294.             lefttopy= p->data[0][3];

  1295.             lefttopu= p->data[1][1];

  1296.             lefttopv= p->data[2][1];

  1297.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1298.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

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

  1300.             encode_422_bitstream(s, width-4);

  1301.             y++; cy++;

  1302. 

  1303.             for(; y<height; y++,cy++){

  1304.                 uint8_t *ydst, *udst, *vdst;

  1305. 

  1306.                 if(s->bitstream_bpp==12){

  1307.                     while(2*cy > y){

  1308.                         ydst= p->data[0] + p->linesize[0]*y;

  1309.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1310.                         encode_gray_bitstream(s, width);

  1311.                         y++;

  1312.                     }

  1313.                     if(y>=height) break;

  1314.                 }

  1315.                 ydst= p->data[0] + p->linesize[0]*y;

  1316.                 udst= p->data[1] + p->linesize[1]*cy;

  1317.                 vdst= p->data[2] + p->linesize[2]*cy;

  1318. 

  1319.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1320.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1321.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1322. 

  1323.                 encode_422_bitstream(s, width);

  1324.             }

  1325.         }else{

  1326.             for(cy=y=1; y<height; y++,cy++){

  1327.                 uint8_t *ydst, *udst, *vdst;

  1328. 

  1329.                 /* encode a luma only line & y++ */

  1330.                 if(s->bitstream_bpp==12){

  1331.                     ydst= p->data[0] + p->linesize[0]*y;

  1332. 

  1333.                     if(s->predictor == PLANE && s->interlaced < y){

  1334.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1335. 

  1336.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1337.                     }else{

  1338.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1339.                     }

  1340.                     encode_gray_bitstream(s, width);

  1341.                     y++;

  1342.                     if(y>=height) break;

  1343.                 }

  1344. 

  1345.                 ydst= p->data[0] + p->linesize[0]*y;

  1346.                 udst= p->data[1] + p->linesize[1]*cy;

  1347.                 vdst= p->data[2] + p->linesize[2]*cy;

  1348. 

  1349.                 if(s->predictor == PLANE && s->interlaced < cy){

  1350.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1351.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1352.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1353. 

  1354.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1355.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1356.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1357.                 }else{

  1358.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1359.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1360.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1361.                 }

  1362. 

  1363.                 encode_422_bitstream(s, width);

  1364.             }

  1365.         }

  1366.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1367.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1368.         const int stride = -p->linesize[0];

  1369.         const int fake_stride = -fake_ystride;

  1370.         int y;

  1371.         int leftr, leftg, leftb;

  1372. 

  1373.         put_bits(&s->pb, 8, leftr= data[R]);

  1374.         put_bits(&s->pb, 8, leftg= data[G]);

  1375.         put_bits(&s->pb, 8, leftb= data[B]);

  1376.         put_bits(&s->pb, 8, 0);

  1377. 

  1378.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1379.         encode_bgr_bitstream(s, width-1);

  1380. 

  1381.         for(y=1; y<s->height; y++){

  1382.             uint8_t *dst = data + y*stride;

  1383.             if(s->predictor == PLANE && s->interlaced < y){

  1384.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1385.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1386.             }else{

  1387.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1388.             }

  1389.             encode_bgr_bitstream(s, width);

  1390.         }

  1391.     }else{

  1392.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1393.     }

  1394.     emms_c();

  1395. 

  1396.     size+= (put_bits_count(&s->pb)+31)/8;

  1397.     size/= 4;

  1398. 

  1399.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1400.         int j;

  1401.         char *p= avctx->stats_out;

  1402.         char *end= p + 1024*30;

  1403.         for(i=0; i<3; i++){

  1404.             for(j=0; j<256; j++){

  1405.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1406.                 p+= strlen(p);

  1407.                 s->stats[i][j]= 0;

  1408.             }

  1409.             snprintf(p, end-p, "\n");

  1410.             p++;

  1411.         }

  1412.     } else

  1413.         avctx->stats_out[0] = '\0';

  1414.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1415.         flush_put_bits(&s->pb);

  1416.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1417.     }

  1418. 

  1419.     s->picture_number++;

  1420. 

  1421.     return size*4;

  1422. }

  1423. 

  1424. static av_cold int encode_end(AVCodecContext *avctx)

  1425. {

  1426.     HYuvContext *s = avctx->priv_data;

  1427. 

  1428.     common_end(s);

  1429. 

  1430.     av_freep(&avctx->extradata);

  1431.     av_freep(&avctx->stats_out);

  1432. 

  1433.     return 0;

  1434. }

  1435. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1436. 

  1437. #if CONFIG_HUFFYUV_DECODER

  1438. AVCodec huffyuv_decoder = {

  1439.     "huffyuv",

  1440.     CODEC_TYPE_VIDEO,

  1441.     CODEC_ID_HUFFYUV,

  1442.     sizeof(HYuvContext),

  1443.     decode_init,

  1444.     NULL,

  1445.     decode_end,

  1446.     decode_frame,

  1447.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1448.     NULL,

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

  1450. };

  1451. #endif

  1452. 

  1453. #if CONFIG_FFVHUFF_DECODER

  1454. AVCodec ffvhuff_decoder = {

  1455.     "ffvhuff",

  1456.     CODEC_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,

  1464.     NULL,

  1465.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1466. };

  1467. #endif

  1468. 

  1469. #if CONFIG_HUFFYUV_ENCODER

  1470. AVCodec huffyuv_encoder = {

  1471.     "huffyuv",

  1472.     CODEC_TYPE_VIDEO,

  1473.     CODEC_ID_HUFFYUV,

  1474.     sizeof(HYuvContext),

  1475.     encode_init,

  1476.     encode_frame,

  1477.     encode_end,

  1478.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1479.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1480. };

  1481. #endif

  1482. 

  1483. #if CONFIG_FFVHUFF_ENCODER

  1484. AVCodec ffvhuff_encoder = {

  1485.     "ffvhuff",

  1486.     CODEC_TYPE_VIDEO,

  1487.     CODEC_ID_FFVHUFF,

  1488.     sizeof(HYuvContext),

  1489.     encode_init,

  1490.     encode_frame,

  1491.     encode_end,

  1492.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1493.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1494. };

  1495. #endif