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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

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "internal.h"

  33. #include "get_bits.h"

  34. #include "put_bits.h"

  35. #include "dsputil.h"

  36. #include "thread.h"

  37. #include "huffman.h"

  38. 

  39. #define VLC_BITS 11

  40. 

  41. #if HAVE_BIGENDIAN

  42. #define B 3

  43. #define G 2

  44. #define R 1

  45. #define A 0

  46. #else

  47. #define B 0

  48. #define G 1

  49. #define R 2

  50. #define A 3

  51. #endif

  52. 

  53. typedef enum Predictor{

  54.     LEFT= 0,

  55.     PLANE,

  56.     MEDIAN,

  57. } Predictor;

  58. 

  59. typedef struct HYuvContext{

  60.     AVCodecContext *avctx;

  61.     Predictor predictor;

  62.     GetBitContext gb;

  63.     PutBitContext pb;

  64.     int interlaced;

  65.     int decorrelate;

  66.     int bitstream_bpp;

  67.     int version;

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

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

  70.     int width, height;

  71.     int flags;

  72.     int context;

  73.     int picture_number;

  74.     int last_slice_end;

  75.     uint8_t *temp[3];

  76.     uint64_t stats[3][256];

  77.     uint8_t len[3][256];

  78.     uint32_t bits[3][256];

  79.     uint32_t pix_bgr_map[1<<VLC_BITS];

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

  81.     AVFrame picture;

  82.     uint8_t *bitstream_buffer;

  83.     unsigned int bitstream_buffer_size;

  84.     DSPContext dsp;

  85. }HYuvContext;

  86. 

  87. #define classic_shift_luma_table_size 42

  88. static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {

  89.   34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,

  90.   16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,

  91.   69,68, 0,

  92.   0,0,0,0,0,0,0,0,

  93. };

  94. 

  95. #define classic_shift_chroma_table_size 59

  96. static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {

  97.   66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,

  98.   56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,

  99.   214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0,

  100.   0,0,0,0,0,0,0,0,

  101. };

  102. 

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

  104.     3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,

  105.    73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,

  106.    68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,

  107.    35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,

  108.    37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,

  109.    35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,

  110.    27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,

  111.    15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,

  112.    12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,

  113.    12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,

  114.    18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,

  115.    28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,

  116.    28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,

  117.    62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,

  118.    54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,

  119.    46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,

  120. };

  121. 

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

  123.     3,  1,  2,  2,  2,  2,  3,  3,  7,  5,  7,  5,  8,  6, 11,  9,

  124.     7, 13, 11, 10,  9,  8,  7,  5,  9,  7,  6,  4,  7,  5,  8,  7,

  125.    11,  8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,

  126.    43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,

  127.   143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,

  128.    80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,

  129.    17, 14,  5,  6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,

  130.   112,113,114,115,  4,117,118, 92, 94,121,122,  3,124,103,  2,  1,

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

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

  133.    52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,

  134.    19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10,  9,  8, 36,

  135.     7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,

  136.    83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,

  137.    14, 16, 17, 18, 20, 21, 12, 14, 15,  9, 10,  6,  9,  6,  5,  8,

  138.     6, 12,  8, 10,  7,  9,  6,  4,  6,  2,  2,  3,  3,  3,  3,  2,

  139. };

  140. 

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

  142.     int i;

  143.     if(w<32){

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

  145.             const int temp= src[i];

  146.             dst[i]= temp - left;

  147.             left= temp;

  148.         }

  149.         return left;

  150.     }else{

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

  152.             const int temp= src[i];

  153.             dst[i]= temp - left;

  154.             left= temp;

  155.         }

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

  157.         return src[w-1];

  158.     }

  159. }

  160. 

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

  162.     int i;

  163.     int r,g,b,a;

  164.     r= *red;

  165.     g= *green;

  166.     b= *blue;

  167.     a= *alpha;

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

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

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

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

  172.         const int at= src[i*4+A];

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

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

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

  176.         dst[i*4+A]= at - a;

  177.         r = rt;

  178.         g = gt;

  179.         b = bt;

  180.         a = at;

  181.     }

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

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

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

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

  186.     *alpha= src[(w-1)*4+A];

  187. }

  188. 

  189. static inline void sub_left_prediction_rgb24(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int *red, int *green, int *blue){

  190.     int i;

  191.     int r,g,b;

  192.     r= *red;

  193.     g= *green;

  194.     b= *blue;

  195.     for(i=0; i<FFMIN(w,16); i++){

  196.         const int rt= src[i*3+0];

  197.         const int gt= src[i*3+1];

  198.         const int bt= src[i*3+2];

  199.         dst[i*3+0]= rt - r;

  200.         dst[i*3+1]= gt - g;

  201.         dst[i*3+2]= bt - b;

  202.         r = rt;

  203.         g = gt;

  204.         b = bt;

  205.     }

  206.     s->dsp.diff_bytes(dst+48, src+48, src+48-3, w*3-48);

  207.     *red=   src[(w-1)*3+0];

  208.     *green= src[(w-1)*3+1];

  209.     *blue=  src[(w-1)*3+2];

  210. }

  211. 

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

  213.     int i, val, repeat;

  214. 

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

  216.         repeat= get_bits(gb, 3);

  217.         val   = get_bits(gb, 5);

  218.         if(repeat==0)

  219.             repeat= get_bits(gb, 8);

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

  221.         if(i+repeat > 256 || get_bits_left(gb) < 0) {

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

  223.             return -1;

  224.         }

  225.         while (repeat--)

  226.             dst[i++] = val;

  227.     }

  228.     return 0;

  229. }

  230. 

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

  232.     int len, index;

  233.     uint32_t bits=0;

  234. 

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

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

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

  238.                 dst[index]= bits++;

  239.         }

  240.         if(bits & 1){

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

  242.             return -1;

  243.         }

  244.         bits >>= 1;

  245.     }

  246.     return 0;

  247. }

  248. 

  249. static void generate_joint_tables(HYuvContext *s){

  250.     uint16_t symbols[1<<VLC_BITS];

  251.     uint16_t bits[1<<VLC_BITS];

  252.     uint8_t len[1<<VLC_BITS];

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

  254.         int p, i, y, u;

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

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

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

  258.                 int limit = VLC_BITS - len0;

  259.                 if(limit <= 0)

  260.                     continue;

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

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

  263.                     if(len1 > limit)

  264.                         continue;

  265.                     len[i] = len0 + len1;

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

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

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

  269.                         i++;

  270.                 }

  271.             }

  272.             ff_free_vlc(&s->vlc[3+p]);

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

  274.         }

  275.     }else{

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

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

  278.         int p0 = s->decorrelate;

  279.         int p1 = !s->decorrelate;

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

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

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

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

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

  285.             int limit0 = VLC_BITS - len0;

  286.             if(limit0 < 2)

  287.                 continue;

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

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

  290.                 int limit1 = limit0 - len1;

  291.                 if(limit1 < 1)

  292.                     continue;

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

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

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

  296.                     if(len2 > limit1)

  297.                         continue;

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

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

  300.                     if(s->decorrelate){

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

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

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

  304.                     }else{

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

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

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

  308.                     }

  309.                     i++;

  310.                 }

  311.             }

  312.         }

  313.         ff_free_vlc(&s->vlc[3]);

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

  315.     }

  316. }

  317. 

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

  319.     GetBitContext gb;

  320.     int i;

  321. 

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

  323. 

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

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

  326.             return -1;

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

  328.             return -1;

  329.         }

  330.         ff_free_vlc(&s->vlc[i]);

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

  332.     }

  333. 

  334.     generate_joint_tables(s);

  335. 

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

  337. }

  338. 

  339. static int read_old_huffman_tables(HYuvContext *s){

  340.     GetBitContext gb;

  341.     int i;

  342. 

  343.     init_get_bits(&gb, classic_shift_luma, classic_shift_luma_table_size*8);

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

  345.         return -1;

  346.     init_get_bits(&gb, classic_shift_chroma, classic_shift_chroma_table_size*8);

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

  348.         return -1;

  349. 

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

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

  352. 

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

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

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

  356.     }

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

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

  359. 

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

  361.         ff_free_vlc(&s->vlc[i]);

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

  363.     }

  364. 

  365.     generate_joint_tables(s);

  366. 

  367.     return 0;

  368. }

  369. 

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

  371.     int i;

  372. 

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

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

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

  376.         }

  377.     }else{

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

  379.     }

  380. }

  381. 

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

  383.     HYuvContext *s = avctx->priv_data;

  384. 

  385.     s->avctx= avctx;

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

  387. 

  388.     ff_dsputil_init(&s->dsp, avctx);

  389. 

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

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

  392.     av_assert1(s->width>0 && s->height>0);

  393. 

  394.     return 0;

  395. }

  396. 

  397. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  398. static av_cold int decode_init(AVCodecContext *avctx)

  399. {

  400.     HYuvContext *s = avctx->priv_data;

  401. 

  402.     common_init(avctx);

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

  404. 

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

  406.     avcodec_get_frame_defaults(&s->picture);

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

  408. 

  409. s->bgr32=1;

  410. //if(avctx->extradata)

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

  412.     if(avctx->extradata_size){

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

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

  415.         else

  416.             s->version=2;

  417.     }else

  418.         s->version=0;

  419. 

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

  421.         int method, interlace;

  422. 

  423.         if (avctx->extradata_size < 4)

  424.             return -1;

  425. 

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

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

  428.         s->predictor= method&63;

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

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

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

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

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

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

  435. 

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

  437.             return -1;

  438.     }else{

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

  440.         case 1:

  441.             s->predictor= LEFT;

  442.             s->decorrelate= 0;

  443.             break;

  444.         case 2:

  445.             s->predictor= LEFT;

  446.             s->decorrelate= 1;

  447.             break;

  448.         case 3:

  449.             s->predictor= PLANE;

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

  451.             break;

  452.         case 4:

  453.             s->predictor= MEDIAN;

  454.             s->decorrelate= 0;

  455.             break;

  456.         default:

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

  458.             s->decorrelate= 0;

  459.             break;

  460.         }

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

  462.         s->context= 0;

  463. 

  464.         if(read_old_huffman_tables(s) < 0)

  465.             return -1;

  466.     }

  467. 

  468.     switch(s->bitstream_bpp){

  469.     case 12:

  470.         avctx->pix_fmt = PIX_FMT_YUV420P;

  471.         break;

  472.     case 16:

  473.         if(s->yuy2){

  474.             avctx->pix_fmt = PIX_FMT_YUYV422;

  475.         }else{

  476.             avctx->pix_fmt = PIX_FMT_YUV422P;

  477.         }

  478.         break;

  479.     case 24:

  480.     case 32:

  481.         if(s->bgr32){

  482.             avctx->pix_fmt = PIX_FMT_RGB32;

  483.         }else{

  484.             avctx->pix_fmt = PIX_FMT_BGR24;

  485.         }

  486.         break;

  487.     default:

  488.         return AVERROR_INVALIDDATA;

  489.     }

  490. 

  491.     if ((avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P) && avctx->width & 1) {

  492.         av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");

  493.         return AVERROR_INVALIDDATA;

  494.     }

  495. 

  496.     alloc_temp(s);

  497. 

  498. //    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);

  499. 

  500.     return 0;

  501. }

  502. 

  503. static av_cold int decode_init_thread_copy(AVCodecContext *avctx)

  504. {

  505.     HYuvContext *s = avctx->priv_data;

  506.     int i;

  507. 

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

  509.     alloc_temp(s);

  510. 

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

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

  513. 

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

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

  516.             return -1;

  517.     }else{

  518.         if(read_old_huffman_tables(s) < 0)

  519.             return -1;

  520.     }

  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, const 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.         av_assert0(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.     case PIX_FMT_YUV422P:

  566.         if (s->width & 1) {

  567.             av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");

  568.             return AVERROR(EINVAL);

  569.         }

  570.         s->bitstream_bpp = avctx->pix_fmt == PIX_FMT_YUV420P ? 12 : 16;

  571.         break;

  572.     case PIX_FMT_RGB32:

  573.         s->bitstream_bpp= 32;

  574.         break;

  575.     case PIX_FMT_RGB24:

  576.         s->bitstream_bpp= 24;

  577.         break;

  578.     default:

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

  580.         return -1;

  581.     }

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

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

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

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

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

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

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

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

  590.             return -1;

  591.         }

  592.     }else s->context= 0;

  593. 

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

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

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

  597.             return -1;

  598.         }

  599.         if(avctx->context_model){

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

  601.             return -1;

  602.         }

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

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

  605.     }

  606. 

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

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

  609.         return -1;

  610.     }

  611. 

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

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

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

  615.     if(s->context)

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

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

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

  619. 

  620.     if(avctx->stats_in){

  621.         char *p= avctx->stats_in;

  622. 

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

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

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

  626. 

  627.         for(;;){

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

  629.                 char *next;

  630. 

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

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

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

  634.                     p=next;

  635.                 }

  636.             }

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

  638.         }

  639.     }else{

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

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

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

  643. 

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

  645.             }

  646.     }

  647. 

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

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

  650. 

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

  652.             return -1;

  653.         }

  654. 

  655.         s->avctx->extradata_size+=

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

  657.     }

  658. 

  659.     if(s->context){

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

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

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

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

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

  665.             }

  666.         }

  667.     }else{

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

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

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

  671.     }

  672. 

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

  674. 

  675.     alloc_temp(s);

  676. 

  677.     s->picture_number=0;

  678. 

  679.     return 0;

  680. }

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

  682. 

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

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

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

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

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

  688.         dst0 = code>>8;\

  689.         dst1 = code;\

  690.     }else{\

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

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

  693.     }\

  694. }

  695. 

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

  697.     int i;

  698. 

  699.     count/=2;

  700. 

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

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

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

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

  705.         }

  706.     }else{

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

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

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

  710.         }

  711.     }

  712. }

  713. 

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

  715.     int i;

  716. 

  717.     count/=2;

  718. 

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

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

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

  722.         }

  723.     }else{

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

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

  726.         }

  727.     }

  728. }

  729. 

  730. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  732.     int i;

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

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

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

  736. 

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

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

  739.         return -1;

  740.     }

  741. 

  742. #define LOAD4\

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

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

  745.             int u0 = u[i];\

  746.             int v0 = v[i];

  747. 

  748.     count/=2;

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

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

  751.             LOAD4;

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

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

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

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

  756.         }

  757.     }

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

  759.         return 0;

  760.     if(s->context){

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

  762.             LOAD4;

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

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

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

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

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

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

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

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

  771.         }

  772.     }else{

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

  774.             LOAD4;

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

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

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

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

  779.         }

  780.     }

  781.     return 0;

  782. }

  783. 

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

  785.     int i;

  786. 

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

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

  789.         return -1;

  790.     }

  791. 

  792. #define LOAD2\

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

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

  795. #define STAT2\

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

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

  798. #define WRITE2\

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

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

  801. 

  802.     count/=2;

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

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

  805.             LOAD2;

  806.             STAT2;

  807.         }

  808.     }

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

  810.         return 0;

  811. 

  812.     if(s->context){

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

  814.             LOAD2;

  815.             STAT2;

  816.             WRITE2;

  817.         }

  818.     }else{

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

  820.             LOAD2;

  821.             WRITE2;

  822.         }

  823.     }

  824.     return 0;

  825. }

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

  827. 

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

  829.     int i;

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

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

  832.         if(code != -1){

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

  834.         }else if(decorrelate){

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

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

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

  838.         }else{

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

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

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

  842.         }

  843.         if(alpha)

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

  845.     }

  846. }

  847. 

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

  849.     if(s->decorrelate){

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

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

  852.         else

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

  854.     }else{

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

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

  857.         else

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

  859.     }

  860. }

  861. 

  862. static inline int encode_bgra_bitstream(HYuvContext *s, int count, int planes){

  863.     int i;

  864. 

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

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

  867.         return -1;

  868.     }

  869. 

  870. #define LOAD3\

  871.             int g= s->temp[0][planes==3 ? 3*i+1 : 4*i+G];\

  872.             int b= (s->temp[0][planes==3 ? 3*i+2 : 4*i+B] - g) & 0xff;\

  873.             int r= (s->temp[0][planes==3 ? 3*i+0 : 4*i+R] - g) & 0xff;\

  874.             int a= s->temp[0][planes*i+A];

  875. #define STAT3\

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

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

  878.             s->stats[2][r]++;\

  879.             if(planes==4) s->stats[2][a]++;

  880. #define WRITE3\

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

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

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

  884.             if(planes==4) put_bits(&s->pb, s->len[2][a], s->bits[2][a]);

  885. 

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

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

  888.             LOAD3;

  889.             STAT3;

  890.         }

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

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

  893.             LOAD3;

  894.             STAT3;

  895.             WRITE3;

  896.         }

  897.     }else{

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

  899.             LOAD3;

  900.             WRITE3;

  901.         }

  902.     }

  903.     return 0;

  904. }

  905. 

  906. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  908.     int h, cy, i;

  909.     int offset[AV_NUM_DATA_POINTERS];

  910. 

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

  912.         return;

  913. 

  914.     h= y - s->last_slice_end;

  915.     y -= h;

  916. 

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

  918.         cy= y>>1;

  919.     }else{

  920.         cy= y;

  921.     }

  922. 

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

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

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

  926.     for (i = 3; i < AV_NUM_DATA_POINTERS; i++)

  927.         offset[i] = 0;

  928.     emms_c();

  929. 

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

  931. 

  932.     s->last_slice_end= y + h;

  933. }

  934. 

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

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

  937.     int buf_size = avpkt->size;

  938.     HYuvContext *s = avctx->priv_data;

  939.     const int width= s->width;

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

  941.     const int height= s->height;

  942.     int fake_ystride, fake_ustride, fake_vstride;

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

  944.     int table_size= 0;

  945. 

  946.     AVFrame *picture = data;

  947. 

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

  949.     if (!s->bitstream_buffer)

  950.         return AVERROR(ENOMEM);

  951. 

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

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

  954. 

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

  956.         ff_thread_release_buffer(avctx, p);

  957. 

  958.     p->reference= 0;

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

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

  961.         return -1;

  962.     }

  963. 

  964.     if(s->context){

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

  966.         if(table_size < 0)

  967.             return -1;

  968.     }

  969. 

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

  971.         return -1;

  972. 

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

  974. 

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

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

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

  978. 

  979.     s->last_slice_end= 0;

  980. 

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

  982.         int y, cy;

  983.         int lefty, leftu, leftv;

  984.         int lefttopy, lefttopu, lefttopv;

  985. 

  986.         if(s->yuy2){

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

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

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

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

  991. 

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

  993.             return -1;

  994.         }else{

  995. 

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

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

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

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

  1000. 

  1001.             switch(s->predictor){

  1002.             case LEFT:

  1003.             case PLANE:

  1004.                 decode_422_bitstream(s, width-2);

  1005.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1006.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1007.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1008.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1009.                 }

  1010. 

  1011.                 for(cy=y=1; y<s->height; y++,cy++){

  1012.                     uint8_t *ydst, *udst, *vdst;

  1013. 

  1014.                     if(s->bitstream_bpp==12){

  1015.                         decode_gray_bitstream(s, width);

  1016. 

  1017.                         ydst= p->data[0] + p->linesize[0]*y;

  1018. 

  1019.                         lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1020.                         if(s->predictor == PLANE){

  1021.                             if(y>s->interlaced)

  1022.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1023.                         }

  1024.                         y++;

  1025.                         if(y>=s->height) break;

  1026.                     }

  1027. 

  1028.                     draw_slice(s, y);

  1029. 

  1030.                     ydst= p->data[0] + p->linesize[0]*y;

  1031.                     udst= p->data[1] + p->linesize[1]*cy;

  1032.                     vdst= p->data[2] + p->linesize[2]*cy;

  1033. 

  1034.                     decode_422_bitstream(s, width);

  1035.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

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

  1037.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1038.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1039.                     }

  1040.                     if(s->predictor == PLANE){

  1041.                         if(cy>s->interlaced){

  1042.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1043.                             if(!(s->flags&CODEC_FLAG_GRAY)){

  1044.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1045.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1046.                             }

  1047.                         }

  1048.                     }

  1049.                 }

  1050.                 draw_slice(s, height);

  1051. 

  1052.                 break;

  1053.             case MEDIAN:

  1054.                 /* first line except first 2 pixels is left predicted */

  1055.                 decode_422_bitstream(s, width-2);

  1056.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1057.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1058.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2-1, leftu);

  1059.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1060.                 }

  1061. 

  1062.                 cy=y=1;

  1063. 

  1064.                 /* second line is left predicted for interlaced case */

  1065.                 if(s->interlaced){

  1066.                     decode_422_bitstream(s, width);

  1067.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1068.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1069.                         leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);

  1070.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1071.                     }

  1072.                     y++; cy++;

  1073.                 }

  1074. 

  1075.                 /* next 4 pixels are left predicted too */

  1076.                 decode_422_bitstream(s, 4);

  1077.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

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

  1079.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1080.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1081.                 }

  1082. 

  1083.                 /* next line except the first 4 pixels is median predicted */

  1084.                 lefttopy= p->data[0][3];

  1085.                 decode_422_bitstream(s, width-4);

  1086.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1087.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1088.                     lefttopu= p->data[1][1];

  1089.                     lefttopv= p->data[2][1];

  1090.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1091.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1092.                 }

  1093.                 y++; cy++;

  1094. 

  1095.                 for(; y<height; y++,cy++){

  1096.                     uint8_t *ydst, *udst, *vdst;

  1097. 

  1098.                     if(s->bitstream_bpp==12){

  1099.                         while(2*cy > y){

  1100.                             decode_gray_bitstream(s, width);

  1101.                             ydst= p->data[0] + p->linesize[0]*y;

  1102.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1103.                             y++;

  1104.                         }

  1105.                         if(y>=height) break;

  1106.                     }

  1107.                     draw_slice(s, y);

  1108. 

  1109.                     decode_422_bitstream(s, width);

  1110. 

  1111.                     ydst= p->data[0] + p->linesize[0]*y;

  1112.                     udst= p->data[1] + p->linesize[1]*cy;

  1113.                     vdst= p->data[2] + p->linesize[2]*cy;

  1114. 

  1115.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1116.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1117.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1118.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1119.                     }

  1120.                 }

  1121. 

  1122.                 draw_slice(s, height);

  1123.                 break;

  1124.             }

  1125.         }

  1126.     }else{

  1127.         int y;

  1128.         int leftr, leftg, leftb, lefta;

  1129.         const int last_line= (height-1)*p->linesize[0];

  1130. 

  1131.         if(s->bitstream_bpp==32){

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

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

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

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

  1136.         }else{

  1137.             leftr= p->data[0][last_line+R]= get_bits(&s->gb, 8);

  1138.             leftg= p->data[0][last_line+G]= get_bits(&s->gb, 8);

  1139.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1140.             lefta= p->data[0][last_line+A]= 255;

  1141.             skip_bits(&s->gb, 8);

  1142.         }

  1143. 

  1144.         if(s->bgr32){

  1145.             switch(s->predictor){

  1146.             case LEFT:

  1147.             case PLANE:

  1148.                 decode_bgr_bitstream(s, width-1);

  1149.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1150. 

  1151.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1152.                     decode_bgr_bitstream(s, width);

  1153. 

  1154.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1155.                     if(s->predictor == PLANE){

  1156.                         if(s->bitstream_bpp!=32) lefta=0;

  1157.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1158.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1159.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1160.                         }

  1161.                     }

  1162.                 }

  1163.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1164.                 break;

  1165.             default:

  1166.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1167.             }

  1168.         }else{

  1169. 

  1170.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1171.             return -1;

  1172.         }

  1173.     }

  1174.     emms_c();

  1175. 

  1176.     *picture= *p;

  1177.     *data_size = sizeof(AVFrame);

  1178. 

  1179.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1180. }

  1181. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1182. 

  1183. static int common_end(HYuvContext *s){

  1184.     int i;

  1185. 

  1186.     for(i=0; i<3; i++){

  1187.         av_freep(&s->temp[i]);

  1188.     }

  1189.     return 0;

  1190. }

  1191. 

  1192. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1193. static av_cold int decode_end(AVCodecContext *avctx)

  1194. {

  1195.     HYuvContext *s = avctx->priv_data;

  1196.     int i;

  1197. 

  1198.     if (s->picture.data[0])

  1199.         avctx->release_buffer(avctx, &s->picture);

  1200. 

  1201.     common_end(s);

  1202.     av_freep(&s->bitstream_buffer);

  1203. 

  1204.     for(i=0; i<6; i++){

  1205.         ff_free_vlc(&s->vlc[i]);

  1206.     }

  1207. 

  1208.     return 0;

  1209. }

  1210. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1211. 

  1212. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1213. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1214.                         const AVFrame *pict, int *got_packet)

  1215. {

  1216.     HYuvContext *s = avctx->priv_data;

  1217.     const int width= s->width;

  1218.     const int width2= s->width>>1;

  1219.     const int height= s->height;

  1220.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1221.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

  1222.     const int fake_vstride= s->interlaced ? pict->linesize[2]*2  : pict->linesize[2];

  1223.     AVFrame * const p= &s->picture;

  1224.     int i, j, size = 0, ret;

  1225. 

  1226.     if ((ret = ff_alloc_packet2(avctx, pkt, width * height * 3 * 4 + FF_MIN_BUFFER_SIZE)) < 0)

  1227.         return ret;

  1228. 

  1229.     *p = *pict;

  1230.     p->pict_type= AV_PICTURE_TYPE_I;

  1231.     p->key_frame= 1;

  1232. 

  1233.     if(s->context){

  1234.         for(i=0; i<3; i++){

  1235.             ff_generate_len_table(s->len[i], s->stats[i]);

  1236.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1237.                 return -1;

  1238.             size += store_table(s, s->len[i], &pkt->data[size]);

  1239.         }

  1240. 

  1241.         for(i=0; i<3; i++)

  1242.             for(j=0; j<256; j++)

  1243.                 s->stats[i][j] >>= 1;

  1244.     }

  1245. 

  1246.     init_put_bits(&s->pb, pkt->data + size, pkt->size - size);

  1247. 

  1248.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1249.         int lefty, leftu, leftv, y, cy;

  1250. 

  1251.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

  1252.         put_bits(&s->pb, 8, lefty= p->data[0][1]);

  1253.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

  1254.         put_bits(&s->pb, 8,        p->data[0][0]);

  1255. 

  1256.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1257.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1258.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1259. 

  1260.         encode_422_bitstream(s, 2, width-2);

  1261. 

  1262.         if(s->predictor==MEDIAN){

  1263.             int lefttopy, lefttopu, lefttopv;

  1264.             cy=y=1;

  1265.             if(s->interlaced){

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

  1267.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1268.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1269. 

  1270.                 encode_422_bitstream(s, 0, width);

  1271.                 y++; cy++;

  1272.             }

  1273. 

  1274.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1275.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1276.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1277. 

  1278.             encode_422_bitstream(s, 0, 4);

  1279. 

  1280.             lefttopy= p->data[0][3];

  1281.             lefttopu= p->data[1][1];

  1282.             lefttopv= p->data[2][1];

  1283.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1284.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1285.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1286.             encode_422_bitstream(s, 0, width-4);

  1287.             y++; cy++;

  1288. 

  1289.             for(; y<height; y++,cy++){

  1290.                 uint8_t *ydst, *udst, *vdst;

  1291. 

  1292.                 if(s->bitstream_bpp==12){

  1293.                     while(2*cy > y){

  1294.                         ydst= p->data[0] + p->linesize[0]*y;

  1295.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1296.                         encode_gray_bitstream(s, width);

  1297.                         y++;

  1298.                     }

  1299.                     if(y>=height) break;

  1300.                 }

  1301.                 ydst= p->data[0] + p->linesize[0]*y;

  1302.                 udst= p->data[1] + p->linesize[1]*cy;

  1303.                 vdst= p->data[2] + p->linesize[2]*cy;

  1304. 

  1305.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1306.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1307.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1308. 

  1309.                 encode_422_bitstream(s, 0, width);

  1310.             }

  1311.         }else{

  1312.             for(cy=y=1; y<height; y++,cy++){

  1313.                 uint8_t *ydst, *udst, *vdst;

  1314. 

  1315.                 /* encode a luma only line & y++ */

  1316.                 if(s->bitstream_bpp==12){

  1317.                     ydst= p->data[0] + p->linesize[0]*y;

  1318. 

  1319.                     if(s->predictor == PLANE && s->interlaced < y){

  1320.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1321. 

  1322.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1323.                     }else{

  1324.                         lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1325.                     }

  1326.                     encode_gray_bitstream(s, width);

  1327.                     y++;

  1328.                     if(y>=height) break;

  1329.                 }

  1330. 

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

  1332.                 udst= p->data[1] + p->linesize[1]*cy;

  1333.                 vdst= p->data[2] + p->linesize[2]*cy;

  1334. 

  1335.                 if(s->predictor == PLANE && s->interlaced < cy){

  1336.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1337.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1338.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1339. 

  1340.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1341.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1342.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1343.                 }else{

  1344.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1345.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1346.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1347.                 }

  1348. 

  1349.                 encode_422_bitstream(s, 0, width);

  1350.             }

  1351.         }

  1352.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1353.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1354.         const int stride = -p->linesize[0];

  1355.         const int fake_stride = -fake_ystride;

  1356.         int y;

  1357.         int leftr, leftg, leftb, lefta;

  1358. 

  1359.         put_bits(&s->pb, 8, lefta= data[A]);

  1360.         put_bits(&s->pb, 8, leftr= data[R]);

  1361.         put_bits(&s->pb, 8, leftg= data[G]);

  1362.         put_bits(&s->pb, 8, leftb= data[B]);

  1363. 

  1364.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb, &lefta);

  1365.         encode_bgra_bitstream(s, width-1, 4);

  1366. 

  1367.         for(y=1; y<s->height; y++){

  1368.             uint8_t *dst = data + y*stride;

  1369.             if(s->predictor == PLANE && s->interlaced < y){

  1370.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1371.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb, &lefta);

  1372.             }else{

  1373.                 sub_left_prediction_bgr32(s, s->temp[0], dst, width, &leftr, &leftg, &leftb, &lefta);

  1374.             }

  1375.             encode_bgra_bitstream(s, width, 4);

  1376.         }

  1377.     }else if(avctx->pix_fmt == PIX_FMT_RGB24){

  1378.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1379.         const int stride = -p->linesize[0];

  1380.         const int fake_stride = -fake_ystride;

  1381.         int y;

  1382.         int leftr, leftg, leftb;

  1383. 

  1384.         put_bits(&s->pb, 8, leftr= data[0]);

  1385.         put_bits(&s->pb, 8, leftg= data[1]);

  1386.         put_bits(&s->pb, 8, leftb= data[2]);

  1387.         put_bits(&s->pb, 8, 0);

  1388. 

  1389.         sub_left_prediction_rgb24(s, s->temp[0], data+3, width-1, &leftr, &leftg, &leftb);

  1390.         encode_bgra_bitstream(s, width-1, 3);

  1391. 

  1392.         for(y=1; y<s->height; y++){

  1393.             uint8_t *dst = data + y*stride;

  1394.             if(s->predictor == PLANE && s->interlaced < y){

  1395.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*3);

  1396.                 sub_left_prediction_rgb24(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1397.             }else{

  1398.                 sub_left_prediction_rgb24(s, s->temp[0], dst, width, &leftr, &leftg, &leftb);

  1399.             }

  1400.             encode_bgra_bitstream(s, width, 3);

  1401.         }

  1402.     }else{

  1403.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1404.     }

  1405.     emms_c();

  1406. 

  1407.     size+= (put_bits_count(&s->pb)+31)/8;

  1408.     put_bits(&s->pb, 16, 0);

  1409.     put_bits(&s->pb, 15, 0);

  1410.     size/= 4;

  1411. 

  1412.     if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){

  1413.         int j;

  1414.         char *p= avctx->stats_out;

  1415.         char *end= p + 1024*30;

  1416.         for(i=0; i<3; i++){

  1417.             for(j=0; j<256; j++){

  1418.                 snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);

  1419.                 p+= strlen(p);

  1420.                 s->stats[i][j]= 0;

  1421.             }

  1422.             snprintf(p, end-p, "\n");

  1423.             p++;

  1424.         }

  1425.     } else

  1426.         avctx->stats_out[0] = '\0';

  1427.     if(!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)){

  1428.         flush_put_bits(&s->pb);

  1429.         s->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);

  1430.     }

  1431. 

  1432.     s->picture_number++;

  1433. 

  1434.     pkt->size   = size*4;

  1435.     pkt->flags |= AV_PKT_FLAG_KEY;

  1436.     *got_packet = 1;

  1437. 

  1438.     return 0;

  1439. }

  1440. 

  1441. static av_cold int encode_end(AVCodecContext *avctx)

  1442. {

  1443.     HYuvContext *s = avctx->priv_data;

  1444. 

  1445.     common_end(s);

  1446. 

  1447.     av_freep(&avctx->extradata);

  1448.     av_freep(&avctx->stats_out);

  1449. 

  1450.     return 0;

  1451. }

  1452. #endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */

  1453. 

  1454. #if CONFIG_HUFFYUV_DECODER

  1455. AVCodec ff_huffyuv_decoder = {

  1456.     .name             = "huffyuv",

  1457.     .type             = AVMEDIA_TYPE_VIDEO,

  1458.     .id               = AV_CODEC_ID_HUFFYUV,

  1459.     .priv_data_size   = sizeof(HYuvContext),

  1460.     .init             = decode_init,

  1461.     .close            = decode_end,

  1462.     .decode           = decode_frame,

  1463.     .capabilities     = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |

  1464.                         CODEC_CAP_FRAME_THREADS,

  1465.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1466.     .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1467. };

  1468. #endif

  1469. 

  1470. #if CONFIG_FFVHUFF_DECODER

  1471. AVCodec ff_ffvhuff_decoder = {

  1472.     .name             = "ffvhuff",

  1473.     .type             = AVMEDIA_TYPE_VIDEO,

  1474.     .id               = AV_CODEC_ID_FFVHUFF,

  1475.     .priv_data_size   = sizeof(HYuvContext),

  1476.     .init             = decode_init,

  1477.     .close            = decode_end,

  1478.     .decode           = decode_frame,

  1479.     .capabilities     = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |

  1480.                         CODEC_CAP_FRAME_THREADS,

  1481.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1482.     .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1483. };

  1484. #endif

  1485. 

  1486. #if CONFIG_HUFFYUV_ENCODER

  1487. AVCodec ff_huffyuv_encoder = {

  1488.     .name           = "huffyuv",

  1489.     .type           = AVMEDIA_TYPE_VIDEO,

  1490.     .id             = AV_CODEC_ID_HUFFYUV,

  1491.     .priv_data_size = sizeof(HYuvContext),

  1492.     .init           = encode_init,

  1493.     .encode2        = encode_frame,

  1494.     .close          = encode_end,

  1495.     .pix_fmts       = (const enum PixelFormat[]){

  1496.         PIX_FMT_YUV422P, PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_NONE

  1497.     },

  1498.     .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1499. };

  1500. #endif

  1501. 

  1502. #if CONFIG_FFVHUFF_ENCODER

  1503. AVCodec ff_ffvhuff_encoder = {

  1504.     .name           = "ffvhuff",

  1505.     .type           = AVMEDIA_TYPE_VIDEO,

  1506.     .id             = AV_CODEC_ID_FFVHUFF,

  1507.     .priv_data_size = sizeof(HYuvContext),

  1508.     .init           = encode_init,

  1509.     .encode2        = encode_frame,

  1510.     .close          = encode_end,

  1511.     .pix_fmts       = (const enum PixelFormat[]){

  1512.         PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_NONE

  1513.     },

  1514.     .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1515. };

  1516. #endif