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FFmpeg/libavcodec/huffyuv.c

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  1. /*

  2.  * huffyuv codec for libavcodec

  3.  *

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

  5.  *

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

  7.  * the algorithm used

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

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

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

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

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

  15.  *

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

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

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

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

  24.  */

  25. 

  26. /**

  27.  * @file libavcodec/huffyuv.c

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "get_bits.h"

  33. #include "put_bits.h"

  34. #include "dsputil.h"

  35. 

  36. #define VLC_BITS 11

  37. 

  38. #if HAVE_BIGENDIAN

  39. #define B 3

  40. #define G 2

  41. #define R 1

  42. #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 sub_left_prediction(HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int left){

  133.     int i;

  134.     if(w<32){

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

  136.             const int temp= src[i];

  137.             dst[i]= temp - left;

  138.             left= temp;

  139.         }

  140.         return left;

  141.     }else{

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

  143.             const int temp= src[i];

  144.             dst[i]= temp - left;

  145.             left= temp;

  146.         }

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

  148.         return src[w-1];

  149.     }

  150. }

  151. 

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

  153.     int i;

  154.     int r,g,b;

  155.     r= *red;

  156.     g= *green;

  157.     b= *blue;

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

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

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

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

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

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

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

  165.         r = rt;

  166.         g = gt;

  167.         b = bt;

  168.     }

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

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

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

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

  173. }

  174. 

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

  176.     int i, val, repeat;

  177. 

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

  179.         repeat= get_bits(gb, 3);

  180.         val   = get_bits(gb, 5);

  181.         if(repeat==0)

  182.             repeat= get_bits(gb, 8);

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

  184.         if(i+repeat > 256) {

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

  186.             return -1;

  187.         }

  188.         while (repeat--)

  189.             dst[i++] = val;

  190.     }

  191.     return 0;

  192. }

  193. 

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

  195.     int len, index;

  196.     uint32_t bits=0;

  197. 

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

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

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

  201.                 dst[index]= bits++;

  202.         }

  203.         if(bits & 1){

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

  205.             return -1;

  206.         }

  207.         bits >>= 1;

  208.     }

  209.     return 0;

  210. }

  211. 

  212. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  213. typedef struct {

  214.     uint64_t val;

  215.     int name;

  216. } HeapElem;

  217. 

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

  219. {

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

  221.         int child = root*2+1;

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

  223.             child++;

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

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

  226.             root = child;

  227.         } else

  228.             break;

  229.     }

  230. }

  231. 

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

  233.     HeapElem h[size];

  234.     int up[2*size];

  235.     int len[2*size];

  236.     int offset, i, next;

  237. 

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

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

  240.             h[i].name = i;

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

  242.         }

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

  244.             heap_sift(h, i, size);

  245. 

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

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

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

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

  250.             h[0].val = INT64_MAX;

  251.             heap_sift(h, 0, size);

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

  253.             h[0].name = next;

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

  255.             heap_sift(h, 0, size);

  256.         }

  257. 

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

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

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

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

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

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

  264.         }

  265.         if(i==size) break;

  266.     }

  267. }

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

  269. 

  270. static void generate_joint_tables(HYuvContext *s){

  271.     uint16_t symbols[1<<VLC_BITS];

  272.     uint16_t bits[1<<VLC_BITS];

  273.     uint8_t len[1<<VLC_BITS];

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

  275.         int p, i, y, u;

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

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

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

  279.                 int limit = VLC_BITS - len0;

  280.                 if(limit <= 0)

  281.                     continue;

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

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

  284.                     if(len1 > limit)

  285.                         continue;

  286.                     len[i] = len0 + len1;

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

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

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

  290.                         i++;

  291.                 }

  292.             }

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

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

  295.         }

  296.     }else{

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

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

  299.         int p0 = s->decorrelate;

  300.         int p1 = !s->decorrelate;

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

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

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

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

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

  306.             int limit0 = VLC_BITS - len0;

  307.             if(limit0 < 2)

  308.                 continue;

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

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

  311.                 int limit1 = limit0 - len1;

  312.                 if(limit1 < 1)

  313.                     continue;

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

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

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

  317.                     if(len2 > limit1)

  318.                         continue;

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

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

  321.                     if(s->decorrelate){

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

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

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

  325.                     }else{

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

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

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

  329.                     }

  330.                     i++;

  331.                 }

  332.             }

  333.         }

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

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

  336.     }

  337. }

  338. 

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

  340.     GetBitContext gb;

  341.     int i;

  342. 

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

  344. 

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

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

  347.             return -1;

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

  349.             return -1;

  350.         }

  351. #if 0

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

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

  354. }

  355. #endif

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

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

  358.     }

  359. 

  360.     generate_joint_tables(s);

  361. 

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

  363. }

  364. 

  365. static int read_old_huffman_tables(HYuvContext *s){

  366. #if 1

  367.     GetBitContext gb;

  368.     int i;

  369. 

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

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

  372.         return -1;

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

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

  375.         return -1;

  376. 

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

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

  379. 

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

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

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

  383.     }

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

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

  386. 

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

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

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

  390.     }

  391. 

  392.     generate_joint_tables(s);

  393. 

  394.     return 0;

  395. #else

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

  397.     return -1;

  398. #endif

  399. }

  400. 

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

  402.     int i;

  403. 

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

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

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

  407.         }

  408.     }else{

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

  410.     }

  411. }

  412. 

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

  414.     HYuvContext *s = avctx->priv_data;

  415. 

  416.     s->avctx= avctx;

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

  418. 

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

  420. 

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

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

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

  424. 

  425.     return 0;

  426. }

  427. 

  428. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  429. static av_cold int decode_init(AVCodecContext *avctx)

  430. {

  431.     HYuvContext *s = avctx->priv_data;

  432. 

  433.     common_init(avctx);

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

  435. 

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

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

  438. 

  439. s->bgr32=1;

  440. //if(avctx->extradata)

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

  442.     if(avctx->extradata_size){

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

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

  445.         else

  446.             s->version=2;

  447.     }else

  448.         s->version=0;

  449. 

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

  451.         int method, interlace;

  452. 

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

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

  455.         s->predictor= method&63;

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

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

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

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

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

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

  462. 

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

  464.             return -1;

  465.     }else{

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

  467.         case 1:

  468.             s->predictor= LEFT;

  469.             s->decorrelate= 0;

  470.             break;

  471.         case 2:

  472.             s->predictor= LEFT;

  473.             s->decorrelate= 1;

  474.             break;

  475.         case 3:

  476.             s->predictor= PLANE;

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

  478.             break;

  479.         case 4:

  480.             s->predictor= MEDIAN;

  481.             s->decorrelate= 0;

  482.             break;

  483.         default:

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

  485.             s->decorrelate= 0;

  486.             break;

  487.         }

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

  489.         s->context= 0;

  490. 

  491.         if(read_old_huffman_tables(s) < 0)

  492.             return -1;

  493.     }

  494. 

  495.     switch(s->bitstream_bpp){

  496.     case 12:

  497.         avctx->pix_fmt = PIX_FMT_YUV420P;

  498.         break;

  499.     case 16:

  500.         if(s->yuy2){

  501.             avctx->pix_fmt = PIX_FMT_YUYV422;

  502.         }else{

  503.             avctx->pix_fmt = PIX_FMT_YUV422P;

  504.         }

  505.         break;

  506.     case 24:

  507.     case 32:

  508.         if(s->bgr32){

  509.             avctx->pix_fmt = PIX_FMT_RGB32;

  510.         }else{

  511.             avctx->pix_fmt = PIX_FMT_BGR24;

  512.         }

  513.         break;

  514.     default:

  515.         assert(0);

  516.     }

  517. 

  518.     alloc_temp(s);

  519. 

  520. //    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);

  521. 

  522.     return 0;

  523. }

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

  525. 

  526. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  528.     int i;

  529.     int index= 0;

  530. 

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

  532.         int val= len[i];

  533.         int repeat=0;

  534. 

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

  536.             repeat++;

  537. 

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

  539.         if(repeat>7){

  540.             buf[index++]= val;

  541.             buf[index++]= repeat;

  542.         }else{

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

  544.         }

  545.     }

  546. 

  547.     return index;

  548. }

  549. 

  550. static av_cold int encode_init(AVCodecContext *avctx)

  551. {

  552.     HYuvContext *s = avctx->priv_data;

  553.     int i, j;

  554. 

  555.     common_init(avctx);

  556. 

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

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

  559.     s->version=2;

  560. 

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

  562. 

  563.     switch(avctx->pix_fmt){

  564.     case PIX_FMT_YUV420P:

  565.         s->bitstream_bpp= 12;

  566.         break;

  567.     case PIX_FMT_YUV422P:

  568.         s->bitstream_bpp= 16;

  569.         break;

  570.     case PIX_FMT_RGB32:

  571.         s->bitstream_bpp= 24;

  572.         break;

  573.     default:

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

  575.         return -1;

  576.     }

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

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

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

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

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

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

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

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

  585.             return -1;

  586.         }

  587.     }else s->context= 0;

  588. 

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

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

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

  592.             return -1;

  593.         }

  594.         if(avctx->context_model){

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

  596.             return -1;

  597.         }

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

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

  600.     }

  601. 

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

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

  604.         return -1;

  605.     }

  606. 

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

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

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

  610.     if(s->context)

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

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

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

  614. 

  615.     if(avctx->stats_in){

  616.         char *p= avctx->stats_in;

  617. 

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

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

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

  621. 

  622.         for(;;){

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

  624.                 char *next;

  625. 

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

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

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

  629.                     p=next;

  630.                 }

  631.             }

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

  633.         }

  634.     }else{

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

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

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

  638. 

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

  640.             }

  641.     }

  642. 

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

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

  645. 

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

  647.             return -1;

  648.         }

  649. 

  650.         s->avctx->extradata_size+=

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

  652.     }

  653. 

  654.     if(s->context){

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

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

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

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

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

  660.             }

  661.         }

  662.     }else{

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

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

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

  666.     }

  667. 

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

  669. 

  670.     alloc_temp(s);

  671. 

  672.     s->picture_number=0;

  673. 

  674.     return 0;

  675. }

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

  677. 

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

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

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

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

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

  683.         dst0 = code>>8;\

  684.         dst1 = code;\

  685.     }else{\

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

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

  688.     }\

  689. }

  690. 

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

  692.     int i;

  693. 

  694.     count/=2;

  695. 

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

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

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

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

  700.         }

  701.     }else{

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

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

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

  705.         }

  706.     }

  707. }

  708. 

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

  710.     int i;

  711. 

  712.     count/=2;

  713. 

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

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

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

  717.         }

  718.     }else{

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

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

  721.         }

  722.     }

  723. }

  724. 

  725. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  727.     int i;

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

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

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

  731. 

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

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

  734.         return -1;

  735.     }

  736. 

  737. #define LOAD4\

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

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

  740.             int u0 = u[i];\

  741.             int v0 = v[i];

  742. 

  743.     count/=2;

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

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

  746.             LOAD4;

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

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

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

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

  751.         }

  752.     }

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

  754.         return 0;

  755.     if(s->context){

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

  757.             LOAD4;

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

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

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

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

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

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

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

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

  766.         }

  767.     }else{

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

  769.             LOAD4;

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

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

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

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

  774.         }

  775.     }

  776.     return 0;

  777. }

  778. 

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

  780.     int i;

  781. 

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

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

  784.         return -1;

  785.     }

  786. 

  787. #define LOAD2\

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

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

  790. #define STAT2\

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

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

  793. #define WRITE2\

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

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

  796. 

  797.     count/=2;

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

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

  800.             LOAD2;

  801.             STAT2;

  802.         }

  803.     }

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

  805.         return 0;

  806. 

  807.     if(s->context){

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

  809.             LOAD2;

  810.             STAT2;

  811.             WRITE2;

  812.         }

  813.     }else{

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

  815.             LOAD2;

  816.             WRITE2;

  817.         }

  818.     }

  819.     return 0;

  820. }

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

  822. 

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

  824.     int i;

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

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

  827.         if(code != -1){

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

  829.         }else if(decorrelate){

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

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

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

  833.         }else{

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

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

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

  837.         }

  838.         if(alpha)

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

  840.     }

  841. }

  842. 

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

  844.     if(s->decorrelate){

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

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

  847.         else

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

  849.     }else{

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

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

  852.         else

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

  854.     }

  855. }

  856. 

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

  858.     int i;

  859. 

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

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

  862.         return -1;

  863.     }

  864. 

  865. #define LOAD3\

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

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

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

  869. #define STAT3\

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

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

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

  873. #define WRITE3\

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

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

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

  877. 

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

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

  880.             LOAD3;

  881.             STAT3;

  882.         }

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

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

  885.             LOAD3;

  886.             STAT3;

  887.             WRITE3;

  888.         }

  889.     }else{

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

  891.             LOAD3;

  892.             WRITE3;

  893.         }

  894.     }

  895.     return 0;

  896. }

  897. 

  898. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  900.     int h, cy;

  901.     int offset[4];

  902. 

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

  904.         return;

  905. 

  906.     h= y - s->last_slice_end;

  907.     y -= h;

  908. 

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

  910.         cy= y>>1;

  911.     }else{

  912.         cy= y;

  913.     }

  914. 

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

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

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

  918.     offset[3] = 0;

  919.     emms_c();

  920. 

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

  922. 

  923.     s->last_slice_end= y + h;

  924. }

  925. 

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

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

  928.     int buf_size = avpkt->size;

  929.     HYuvContext *s = avctx->priv_data;

  930.     const int width= s->width;

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

  932.     const int height= s->height;

  933.     int fake_ystride, fake_ustride, fake_vstride;

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

  935.     int table_size= 0;

  936. 

  937.     AVFrame *picture = data;

  938. 

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

  940.     if (!s->bitstream_buffer)

  941.         return AVERROR(ENOMEM);

  942. 

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

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

  945. 

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

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

  948. 

  949.     p->reference= 0;

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

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

  952.         return -1;

  953.     }

  954. 

  955.     if(s->context){

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

  957.         if(table_size < 0)

  958.             return -1;

  959.     }

  960. 

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

  962.         return -1;

  963. 

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

  965. 

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

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

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

  969. 

  970.     s->last_slice_end= 0;

  971. 

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

  973.         int y, cy;

  974.         int lefty, leftu, leftv;

  975.         int lefttopy, lefttopu, lefttopv;

  976. 

  977.         if(s->yuy2){

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

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

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

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

  982. 

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

  984.             return -1;

  985.         }else{

  986. 

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

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

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

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

  991. 

  992.             switch(s->predictor){

  993.             case LEFT:

  994.             case PLANE:

  995.                 decode_422_bitstream(s, width-2);

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

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

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

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

  1000.                 }

  1001. 

  1002.                 for(cy=y=1; y<s->height; y++,cy++){

  1003.                     uint8_t *ydst, *udst, *vdst;

  1004. 

  1005.                     if(s->bitstream_bpp==12){

  1006.                         decode_gray_bitstream(s, width);

  1007. 

  1008.                         ydst= p->data[0] + p->linesize[0]*y;

  1009. 

  1010.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1011.                         if(s->predictor == PLANE){

  1012.                             if(y>s->interlaced)

  1013.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1014.                         }

  1015.                         y++;

  1016.                         if(y>=s->height) break;

  1017.                     }

  1018. 

  1019.                     draw_slice(s, y);

  1020. 

  1021.                     ydst= p->data[0] + p->linesize[0]*y;

  1022.                     udst= p->data[1] + p->linesize[1]*cy;

  1023.                     vdst= p->data[2] + p->linesize[2]*cy;

  1024. 

  1025.                     decode_422_bitstream(s, width);

  1026.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1027.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1028.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1029.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1030.                     }

  1031.                     if(s->predictor == PLANE){

  1032.                         if(cy>s->interlaced){

  1033.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1034.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1035.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1036.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1037.                             }

  1038.                         }

  1039.                     }

  1040.                 }

  1041.                 draw_slice(s, height);

  1042. 

  1043.                 break;

  1044.             case MEDIAN:

  1045.                 /* first line except first 2 pixels is left predicted */

  1046.                 decode_422_bitstream(s, width-2);

  1047.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1048.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1049.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1050.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1051.                 }

  1052. 

  1053.                 cy=y=1;

  1054. 

  1055.                 /* second line is left predicted for interlaced case */

  1056.                 if(s->interlaced){

  1057.                     decode_422_bitstream(s, width);

  1058.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

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

  1060.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1061.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1062.                     }

  1063.                     y++; cy++;

  1064.                 }

  1065. 

  1066.                 /* next 4 pixels are left predicted too */

  1067.                 decode_422_bitstream(s, 4);

  1068.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1069.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1070.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1071.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1072.                 }

  1073. 

  1074.                 /* next line except the first 4 pixels is median predicted */

  1075.                 lefttopy= p->data[0][3];

  1076.                 decode_422_bitstream(s, width-4);

  1077.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1078.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1079.                     lefttopu= p->data[1][1];

  1080.                     lefttopv= p->data[2][1];

  1081.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1082.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1083.                 }

  1084.                 y++; cy++;

  1085. 

  1086.                 for(; y<height; y++,cy++){

  1087.                     uint8_t *ydst, *udst, *vdst;

  1088. 

  1089.                     if(s->bitstream_bpp==12){

  1090.                         while(2*cy > y){

  1091.                             decode_gray_bitstream(s, width);

  1092.                             ydst= p->data[0] + p->linesize[0]*y;

  1093.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1094.                             y++;

  1095.                         }

  1096.                         if(y>=height) break;

  1097.                     }

  1098.                     draw_slice(s, y);

  1099. 

  1100.                     decode_422_bitstream(s, width);

  1101. 

  1102.                     ydst= p->data[0] + p->linesize[0]*y;

  1103.                     udst= p->data[1] + p->linesize[1]*cy;

  1104.                     vdst= p->data[2] + p->linesize[2]*cy;

  1105. 

  1106.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1107.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1108.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1109.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1110.                     }

  1111.                 }

  1112. 

  1113.                 draw_slice(s, height);

  1114.                 break;

  1115.             }

  1116.         }

  1117.     }else{

  1118.         int y;

  1119.         int leftr, leftg, leftb;

  1120.         const int last_line= (height-1)*p->linesize[0];

  1121. 

  1122.         if(s->bitstream_bpp==32){

  1123.             skip_bits(&s->gb, 8);

  1124.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

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

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

  1127.         }else{

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

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

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

  1131.             skip_bits(&s->gb, 8);

  1132.         }

  1133. 

  1134.         if(s->bgr32){

  1135.             switch(s->predictor){

  1136.             case LEFT:

  1137.             case PLANE:

  1138.                 decode_bgr_bitstream(s, width-1);

  1139.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb);

  1140. 

  1141.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1142.                     decode_bgr_bitstream(s, width);

  1143. 

  1144.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb);

  1145.                     if(s->predictor == PLANE){

  1146.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1147.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1148.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1149.                         }

  1150.                     }

  1151.                 }

  1152.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1153.                 break;

  1154.             default:

  1155.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1156.             }

  1157.         }else{

  1158. 

  1159.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1160.             return -1;

  1161.         }

  1162.     }

  1163.     emms_c();

  1164. 

  1165.     *picture= *p;

  1166.     *data_size = sizeof(AVFrame);

  1167. 

  1168.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1169. }

  1170. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1171. 

  1172. static int common_end(HYuvContext *s){

  1173.     int i;

  1174. 

  1175.     for(i=0; i<3; i++){

  1176.         av_freep(&s->temp[i]);

  1177.     }

  1178.     return 0;

  1179. }

  1180. 

  1181. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1182. static av_cold int decode_end(AVCodecContext *avctx)

  1183. {

  1184.     HYuvContext *s = avctx->priv_data;

  1185.     int i;

  1186. 

  1187.     if (s->picture.data[0])

  1188.         avctx->release_buffer(avctx, &s->picture);

  1189. 

  1190.     common_end(s);

  1191.     av_freep(&s->bitstream_buffer);

  1192. 

  1193.     for(i=0; i<6; i++){

  1194.         free_vlc(&s->vlc[i]);

  1195.     }

  1196. 

  1197.     return 0;

  1198. }

  1199. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1200. 

  1201. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1202. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1203.     HYuvContext *s = avctx->priv_data;

  1204.     AVFrame *pict = data;

  1205.     const int width= s->width;

  1206.     const int width2= s->width>>1;

  1207.     const int height= s->height;

  1208.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1209.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1210.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1211.     AVFrame * const p= &s->picture;

  1212.     int i, j, size=0;

  1213. 

  1214.     *p = *pict;

  1215.     p->pict_type= FF_I_TYPE;

  1216.     p->key_frame= 1;

  1217. 

  1218.     if(s->context){

  1219.         for(i=0; i<3; i++){

  1220.             generate_len_table(s->len[i], s->stats[i], 256);

  1221.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1222.                 return -1;

  1223.             size+= store_table(s, s->len[i], &buf[size]);

  1224.         }

  1225. 

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

  1227.             for(j=0; j<256; j++)

  1228.                 s->stats[i][j] >>= 1;

  1229.     }

  1230. 

  1231.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1232. 

  1233.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1234.         int lefty, leftu, leftv, y, cy;

  1235. 

  1236.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1237.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1238.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1239.         put_bits(&s->pb, 8,        p->data[0][0]);

  1240. 

  1241.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1242.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1243.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1244. 

  1245.         encode_422_bitstream(s, 2, width-2);

  1246. 

  1247.         if(s->predictor==MEDIAN){

  1248.             int lefttopy, lefttopu, lefttopv;

  1249.             cy=y=1;

  1250.             if(s->interlaced){

  1251.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1252.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1253.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1254. 

  1255.                 encode_422_bitstream(s, 0, width);

  1256.                 y++; cy++;

  1257.             }

  1258. 

  1259.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1260.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1261.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1262. 

  1263.             encode_422_bitstream(s, 0, 4);

  1264. 

  1265.             lefttopy= p->data[0][3];

  1266.             lefttopu= p->data[1][1];

  1267.             lefttopv= p->data[2][1];

  1268.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1269.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1270.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1271.             encode_422_bitstream(s, 0, width-4);

  1272.             y++; cy++;

  1273. 

  1274.             for(; y<height; y++,cy++){

  1275.                 uint8_t *ydst, *udst, *vdst;

  1276. 

  1277.                 if(s->bitstream_bpp==12){

  1278.                     while(2*cy > y){

  1279.                         ydst= p->data[0] + p->linesize[0]*y;

  1280.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1281.                         encode_gray_bitstream(s, width);

  1282.                         y++;

  1283.                     }

  1284.                     if(y>=height) break;

  1285.                 }

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

  1287.                 udst= p->data[1] + p->linesize[1]*cy;

  1288.                 vdst= p->data[2] + p->linesize[2]*cy;

  1289. 

  1290.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1291.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1292.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1293. 

  1294.                 encode_422_bitstream(s, 0, width);

  1295.             }

  1296.         }else{

  1297.             for(cy=y=1; y<height; y++,cy++){

  1298.                 uint8_t *ydst, *udst, *vdst;

  1299. 

  1300.                 /* encode a luma only line & y++ */

  1301.                 if(s->bitstream_bpp==12){

  1302.                     ydst= p->data[0] + p->linesize[0]*y;

  1303. 

  1304.                     if(s->predictor == PLANE && s->interlaced < y){

  1305.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1306. 

  1307.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1308.                     }else{

  1309.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1310.                     }

  1311.                     encode_gray_bitstream(s, width);

  1312.                     y++;

  1313.                     if(y>=height) break;

  1314.                 }

  1315. 

  1316.                 ydst= p->data[0] + p->linesize[0]*y;

  1317.                 udst= p->data[1] + p->linesize[1]*cy;

  1318.                 vdst= p->data[2] + p->linesize[2]*cy;

  1319. 

  1320.                 if(s->predictor == PLANE && s->interlaced < cy){

  1321.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1322.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1323.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1324. 

  1325.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1326.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1327.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1328.                 }else{

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

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

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

  1332.                 }

  1333. 

  1334.                 encode_422_bitstream(s, 0, width);

  1335.             }

  1336.         }

  1337.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1338.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1339.         const int stride = -p->linesize[0];

  1340.         const int fake_stride = -fake_ystride;

  1341.         int y;

  1342.         int leftr, leftg, leftb;

  1343. 

  1344.         put_bits(&s->pb, 8, leftr= data[R]);

  1345.         put_bits(&s->pb, 8, leftg= data[G]);

  1346.         put_bits(&s->pb, 8, leftb= data[B]);

  1347.         put_bits(&s->pb, 8, 0);

  1348. 

  1349.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1350.         encode_bgr_bitstream(s, width-1);

  1351. 

  1352.         for(y=1; y<s->height; y++){

  1353.             uint8_t *dst = data + y*stride;

  1354.             if(s->predictor == PLANE && s->interlaced < y){

  1355.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

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

  1357.             }else{

  1358.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1359.             }

  1360.             encode_bgr_bitstream(s, width);

  1361.         }

  1362.     }else{

  1363.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1364.     }

  1365.     emms_c();

  1366. 

  1367.     size+= (put_bits_count(&s->pb)+31)/8;

  1368.     put_bits(&s->pb, 16, 0);

  1369.     put_bits(&s->pb, 15, 0);

  1370.     size/= 4;

  1371. 

  1372.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1373.         int j;

  1374.         char *p= avctx->stats_out;

  1375.         char *end= p + 1024*30;

  1376.         for(i=0; i<3; i++){

  1377.             for(j=0; j<256; j++){

  1378.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1379.                 p+= strlen(p);

  1380.                 s->stats[i][j]= 0;

  1381.             }

  1382.             snprintf(p, end-p, "\n");

  1383.             p++;

  1384.         }

  1385.     } else

  1386.         avctx->stats_out[0] = '\0';

  1387.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1388.         flush_put_bits(&s->pb);

  1389.         s->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  1390.     }

  1391. 

  1392.     s->picture_number++;

  1393. 

  1394.     return size*4;

  1395. }

  1396. 

  1397. static av_cold int encode_end(AVCodecContext *avctx)

  1398. {

  1399.     HYuvContext *s = avctx->priv_data;

  1400. 

  1401.     common_end(s);

  1402. 

  1403.     av_freep(&avctx->extradata);

  1404.     av_freep(&avctx->stats_out);

  1405. 

  1406.     return 0;

  1407. }

  1408. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1409. 

  1410. #if CONFIG_HUFFYUV_DECODER

  1411. AVCodec huffyuv_decoder = {

  1412.     "huffyuv",

  1413.     CODEC_TYPE_VIDEO,

  1414.     CODEC_ID_HUFFYUV,

  1415.     sizeof(HYuvContext),

  1416.     decode_init,

  1417.     NULL,

  1418.     decode_end,

  1419.     decode_frame,

  1420.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1421.     NULL,

  1422.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1423. };

  1424. #endif

  1425. 

  1426. #if CONFIG_FFVHUFF_DECODER

  1427. AVCodec ffvhuff_decoder = {

  1428.     "ffvhuff",

  1429.     CODEC_TYPE_VIDEO,

  1430.     CODEC_ID_FFVHUFF,

  1431.     sizeof(HYuvContext),

  1432.     decode_init,

  1433.     NULL,

  1434.     decode_end,

  1435.     decode_frame,

  1436.     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,

  1437.     NULL,

  1438.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1439. };

  1440. #endif

  1441. 

  1442. #if CONFIG_HUFFYUV_ENCODER

  1443. AVCodec huffyuv_encoder = {

  1444.     "huffyuv",

  1445.     CODEC_TYPE_VIDEO,

  1446.     CODEC_ID_HUFFYUV,

  1447.     sizeof(HYuvContext),

  1448.     encode_init,

  1449.     encode_frame,

  1450.     encode_end,

  1451.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1452.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1453. };

  1454. #endif

  1455. 

  1456. #if CONFIG_FFVHUFF_ENCODER

  1457. AVCodec ffvhuff_encoder = {

  1458.     "ffvhuff",

  1459.     CODEC_TYPE_VIDEO,

  1460.     CODEC_ID_FFVHUFF,

  1461.     sizeof(HYuvContext),

  1462.     encode_init,

  1463.     encode_frame,

  1464.     encode_end,

  1465.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

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

  1467. };

  1468. #endif