falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33469 Commits
32 Branches
283MB
Tree: 4b4a6ebd68
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '4b4a6ebd68'
${ noResults }
FFmpeg/libavcodec/huffyuv.c

1494 lines
49KB
Raw Blame History 

  1. /*

  2.  * huffyuv codec for libavcodec

  3.  *

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

  5.  *

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

  7.  * the algorithm used

  8.  *

  9.  * This file is part of FFmpeg.

  10.  *

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

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

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

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

  15.  *

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

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

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

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

  24.  */

  25. 

  26. /**

  27.  * @file

  28.  * huffyuv codec for libavcodec.

  29.  */

  30. 

  31. #include "avcodec.h"

  32. #include "get_bits.h"

  33. #include "put_bits.h"

  34. #include "dsputil.h"

  35. #include "thread.h"

  36. 

  37. #define VLC_BITS 11

  38. 

  39. #if HAVE_BIGENDIAN

  40. #define B 3

  41. #define G 2

  42. #define R 1

  43. #define A 0

  44. #else

  45. #define B 0

  46. #define G 1

  47. #define R 2

  48. #define A 3

  49. #endif

  50. 

  51. typedef enum Predictor{

  52.     LEFT= 0,

  53.     PLANE,

  54.     MEDIAN,

  55. } Predictor;

  56. 

  57. typedef struct HYuvContext{

  58.     AVCodecContext *avctx;

  59.     Predictor predictor;

  60.     GetBitContext gb;

  61.     PutBitContext pb;

  62.     int interlaced;

  63.     int decorrelate;

  64.     int bitstream_bpp;

  65.     int version;

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

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

  68.     int width, height;

  69.     int flags;

  70.     int context;

  71.     int picture_number;

  72.     int last_slice_end;

  73.     uint8_t *temp[3];

  74.     uint64_t stats[3][256];

  75.     uint8_t len[3][256];

  76.     uint32_t bits[3][256];

  77.     uint32_t pix_bgr_map[1<<VLC_BITS];

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

  79.     AVFrame picture;

  80.     uint8_t *bitstream_buffer;

  81.     unsigned int bitstream_buffer_size;

  82.     DSPContext dsp;

  83. }HYuvContext;

  84. 

  85. static const unsigned char classic_shift_luma[] = {

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

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

  88.   69,68, 0

  89. };

  90. 

  91. static const unsigned char classic_shift_chroma[] = {

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

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

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

  95. };

  96. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  114. };

  115. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  133. };

  134. 

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

  136.     int i;

  137.     if(w<32){

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

  139.             const int temp= src[i];

  140.             dst[i]= temp - left;

  141.             left= temp;

  142.         }

  143.         return left;

  144.     }else{

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

  146.             const int temp= src[i];

  147.             dst[i]= temp - left;

  148.             left= temp;

  149.         }

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

  151.         return src[w-1];

  152.     }

  153. }

  154. 

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

  156.     int i;

  157.     int r,g,b;

  158.     r= *red;

  159.     g= *green;

  160.     b= *blue;

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

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

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

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

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

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

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

  168.         r = rt;

  169.         g = gt;

  170.         b = bt;

  171.     }

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

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

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

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

  176. }

  177. 

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

  179.     int i, val, repeat;

  180. 

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

  182.         repeat= get_bits(gb, 3);

  183.         val   = get_bits(gb, 5);

  184.         if(repeat==0)

  185.             repeat= get_bits(gb, 8);

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

  187.         if(i+repeat > 256) {

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

  189.             return -1;

  190.         }

  191.         while (repeat--)

  192.             dst[i++] = val;

  193.     }

  194.     return 0;

  195. }

  196. 

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

  198.     int len, index;

  199.     uint32_t bits=0;

  200. 

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

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

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

  204.                 dst[index]= bits++;

  205.         }

  206.         if(bits & 1){

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

  208.             return -1;

  209.         }

  210.         bits >>= 1;

  211.     }

  212.     return 0;

  213. }

  214. 

  215. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  216. typedef struct {

  217.     uint64_t val;

  218.     int name;

  219. } HeapElem;

  220. 

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

  222. {

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

  224.         int child = root*2+1;

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

  226.             child++;

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

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

  229.             root = child;

  230.         } else

  231.             break;

  232.     }

  233. }

  234. 

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

  236.     HeapElem h[256];

  237.     int up[2*256];

  238.     int len[2*256];

  239.     int offset, i, next;

  240.     int size = 256;

  241. 

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

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

  244.             h[i].name = i;

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

  246.         }

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

  248.             heap_sift(h, i, size);

  249. 

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

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

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

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

  254.             h[0].val = INT64_MAX;

  255.             heap_sift(h, 0, size);

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

  257.             h[0].name = next;

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

  259.             heap_sift(h, 0, size);

  260.         }

  261. 

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

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

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

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

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

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

  268.         }

  269.         if(i==size) break;

  270.     }

  271. }

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

  273. 

  274. static void generate_joint_tables(HYuvContext *s){

  275.     uint16_t symbols[1<<VLC_BITS];

  276.     uint16_t bits[1<<VLC_BITS];

  277.     uint8_t len[1<<VLC_BITS];

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

  279.         int p, i, y, u;

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

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

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

  283.                 int limit = VLC_BITS - len0;

  284.                 if(limit <= 0)

  285.                     continue;

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

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

  288.                     if(len1 > limit)

  289.                         continue;

  290.                     len[i] = len0 + len1;

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

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

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

  294.                         i++;

  295.                 }

  296.             }

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

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

  299.         }

  300.     }else{

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

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

  303.         int p0 = s->decorrelate;

  304.         int p1 = !s->decorrelate;

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

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

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

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

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

  310.             int limit0 = VLC_BITS - len0;

  311.             if(limit0 < 2)

  312.                 continue;

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

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

  315.                 int limit1 = limit0 - len1;

  316.                 if(limit1 < 1)

  317.                     continue;

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

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

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

  321.                     if(len2 > limit1)

  322.                         continue;

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

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

  325.                     if(s->decorrelate){

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

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

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

  329.                     }else{

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

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

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

  333.                     }

  334.                     i++;

  335.                 }

  336.             }

  337.         }

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

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

  340.     }

  341. }

  342. 

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

  344.     GetBitContext gb;

  345.     int i;

  346. 

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

  348. 

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

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

  351.             return -1;

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

  353.             return -1;

  354.         }

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

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

  357.     }

  358. 

  359.     generate_joint_tables(s);

  360. 

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

  362. }

  363. 

  364. static int read_old_huffman_tables(HYuvContext *s){

  365. #if 1

  366.     GetBitContext gb;

  367.     int i;

  368. 

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

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

  371.         return -1;

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

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

  374.         return -1;

  375. 

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

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

  378. 

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

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

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

  382.     }

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

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

  385. 

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

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

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

  389.     }

  390. 

  391.     generate_joint_tables(s);

  392. 

  393.     return 0;

  394. #else

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

  396.     return -1;

  397. #endif

  398. }

  399. 

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

  401.     int i;

  402. 

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

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

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

  406.         }

  407.     }else{

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

  409.     }

  410. }

  411. 

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

  413.     HYuvContext *s = avctx->priv_data;

  414. 

  415.     s->avctx= avctx;

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

  417. 

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

  419. 

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

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

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

  423. 

  424.     return 0;

  425. }

  426. 

  427. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  428. static av_cold int decode_init(AVCodecContext *avctx)

  429. {

  430.     HYuvContext *s = avctx->priv_data;

  431. 

  432.     common_init(avctx);

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

  434. 

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

  436.     avcodec_get_frame_defaults(&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.         if (avctx->extradata_size < 4)

  454.             return -1;

  455. 

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

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

  458.         s->predictor= method&63;

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

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

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

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

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

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

  465. 

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

  467.             return -1;

  468.     }else{

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

  470.         case 1:

  471.             s->predictor= LEFT;

  472.             s->decorrelate= 0;

  473.             break;

  474.         case 2:

  475.             s->predictor= LEFT;

  476.             s->decorrelate= 1;

  477.             break;

  478.         case 3:

  479.             s->predictor= PLANE;

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

  481.             break;

  482.         case 4:

  483.             s->predictor= MEDIAN;

  484.             s->decorrelate= 0;

  485.             break;

  486.         default:

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

  488.             s->decorrelate= 0;

  489.             break;

  490.         }

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

  492.         s->context= 0;

  493. 

  494.         if(read_old_huffman_tables(s) < 0)

  495.             return -1;

  496.     }

  497. 

  498.     switch(s->bitstream_bpp){

  499.     case 12:

  500.         avctx->pix_fmt = PIX_FMT_YUV420P;

  501.         break;

  502.     case 16:

  503.         if(s->yuy2){

  504.             avctx->pix_fmt = PIX_FMT_YUYV422;

  505.         }else{

  506.             avctx->pix_fmt = PIX_FMT_YUV422P;

  507.         }

  508.         break;

  509.     case 24:

  510.     case 32:

  511.         if(s->bgr32){

  512.             avctx->pix_fmt = PIX_FMT_RGB32;

  513.         }else{

  514.             avctx->pix_fmt = PIX_FMT_BGR24;

  515.         }

  516.         break;

  517.     default:

  518.         assert(0);

  519.     }

  520. 

  521.     alloc_temp(s);

  522. 

  523. //    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);

  524. 

  525.     return 0;

  526. }

  527. 

  528. static av_cold int decode_init_thread_copy(AVCodecContext *avctx)

  529. {

  530.     HYuvContext *s = avctx->priv_data;

  531.     int i;

  532. 

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

  534.     alloc_temp(s);

  535. 

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

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

  538. 

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

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

  541.             return -1;

  542.     }else{

  543.         if(read_old_huffman_tables(s) < 0)

  544.             return -1;

  545.     }

  546. 

  547.     return 0;

  548. }

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

  550. 

  551. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  553.     int i;

  554.     int index= 0;

  555. 

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

  557.         int val= len[i];

  558.         int repeat=0;

  559. 

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

  561.             repeat++;

  562. 

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

  564.         if(repeat>7){

  565.             buf[index++]= val;

  566.             buf[index++]= repeat;

  567.         }else{

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

  569.         }

  570.     }

  571. 

  572.     return index;

  573. }

  574. 

  575. static av_cold int encode_init(AVCodecContext *avctx)

  576. {

  577.     HYuvContext *s = avctx->priv_data;

  578.     int i, j;

  579. 

  580.     common_init(avctx);

  581. 

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

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

  584.     s->version=2;

  585. 

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

  587. 

  588.     switch(avctx->pix_fmt){

  589.     case PIX_FMT_YUV420P:

  590.         s->bitstream_bpp= 12;

  591.         break;

  592.     case PIX_FMT_YUV422P:

  593.         s->bitstream_bpp= 16;

  594.         break;

  595.     case PIX_FMT_RGB32:

  596.         s->bitstream_bpp= 24;

  597.         break;

  598.     default:

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

  600.         return -1;

  601.     }

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

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

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

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

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

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

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

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

  610.             return -1;

  611.         }

  612.     }else s->context= 0;

  613. 

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

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

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

  617.             return -1;

  618.         }

  619.         if(avctx->context_model){

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

  621.             return -1;

  622.         }

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

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

  625.     }

  626. 

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

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

  629.         return -1;

  630.     }

  631. 

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

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

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

  635.     if(s->context)

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

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

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

  639. 

  640.     if(avctx->stats_in){

  641.         char *p= avctx->stats_in;

  642. 

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

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

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

  646. 

  647.         for(;;){

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

  649.                 char *next;

  650. 

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

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

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

  654.                     p=next;

  655.                 }

  656.             }

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

  658.         }

  659.     }else{

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

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

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

  663. 

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

  665.             }

  666.     }

  667. 

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

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

  670. 

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

  672.             return -1;

  673.         }

  674. 

  675.         s->avctx->extradata_size+=

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

  677.     }

  678. 

  679.     if(s->context){

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

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

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

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

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

  685.             }

  686.         }

  687.     }else{

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

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

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

  691.     }

  692. 

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

  694. 

  695.     alloc_temp(s);

  696. 

  697.     s->picture_number=0;

  698. 

  699.     return 0;

  700. }

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

  702. 

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

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

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

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

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

  708.         dst0 = code>>8;\

  709.         dst1 = code;\

  710.     }else{\

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

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

  713.     }\

  714. }

  715. 

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

  717.     int i;

  718. 

  719.     count/=2;

  720. 

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

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

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

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

  725.         }

  726.     }else{

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

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

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

  730.         }

  731.     }

  732. }

  733. 

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

  735.     int i;

  736. 

  737.     count/=2;

  738. 

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

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

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

  742.         }

  743.     }else{

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

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

  746.         }

  747.     }

  748. }

  749. 

  750. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

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

  752.     int i;

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

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

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

  756. 

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

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

  759.         return -1;

  760.     }

  761. 

  762. #define LOAD4\

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

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

  765.             int u0 = u[i];\

  766.             int v0 = v[i];

  767. 

  768.     count/=2;

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

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

  771.             LOAD4;

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

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

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

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

  776.         }

  777.     }

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

  779.         return 0;

  780.     if(s->context){

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

  782.             LOAD4;

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

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

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

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

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

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

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

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

  791.         }

  792.     }else{

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

  794.             LOAD4;

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

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

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

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

  799.         }

  800.     }

  801.     return 0;

  802. }

  803. 

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

  805.     int i;

  806. 

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

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

  809.         return -1;

  810.     }

  811. 

  812. #define LOAD2\

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

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

  815. #define STAT2\

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

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

  818. #define WRITE2\

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

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

  821. 

  822.     count/=2;

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

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

  825.             LOAD2;

  826.             STAT2;

  827.         }

  828.     }

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

  830.         return 0;

  831. 

  832.     if(s->context){

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

  834.             LOAD2;

  835.             STAT2;

  836.             WRITE2;

  837.         }

  838.     }else{

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

  840.             LOAD2;

  841.             WRITE2;

  842.         }

  843.     }

  844.     return 0;

  845. }

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

  847. 

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

  849.     int i;

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

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

  852.         if(code != -1){

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

  854.         }else if(decorrelate){

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

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

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

  858.         }else{

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

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

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

  862.         }

  863.         if(alpha)

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

  865.     }

  866. }

  867. 

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

  869.     if(s->decorrelate){

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

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

  872.         else

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

  874.     }else{

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

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

  877.         else

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

  879.     }

  880. }

  881. 

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

  883.     int i;

  884. 

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

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

  887.         return -1;

  888.     }

  889. 

  890. #define LOAD3\

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

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

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

  894. #define STAT3\

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

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

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

  898. #define WRITE3\

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

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

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

  902. 

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

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

  905.             LOAD3;

  906.             STAT3;

  907.         }

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

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

  910.             LOAD3;

  911.             STAT3;

  912.             WRITE3;

  913.         }

  914.     }else{

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

  916.             LOAD3;

  917.             WRITE3;

  918.         }

  919.     }

  920.     return 0;

  921. }

  922. 

  923. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

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

  925.     int h, cy;

  926.     int offset[4];

  927. 

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

  929.         return;

  930. 

  931.     h= y - s->last_slice_end;

  932.     y -= h;

  933. 

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

  935.         cy= y>>1;

  936.     }else{

  937.         cy= y;

  938.     }

  939. 

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

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

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

  943.     offset[3] = 0;

  944.     emms_c();

  945. 

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

  947. 

  948.     s->last_slice_end= y + h;

  949. }

  950. 

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

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

  953.     int buf_size = avpkt->size;

  954.     HYuvContext *s = avctx->priv_data;

  955.     const int width= s->width;

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

  957.     const int height= s->height;

  958.     int fake_ystride, fake_ustride, fake_vstride;

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

  960.     int table_size= 0;

  961. 

  962.     AVFrame *picture = data;

  963. 

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

  965.     if (!s->bitstream_buffer)

  966.         return AVERROR(ENOMEM);

  967. 

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

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

  970. 

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

  972.         ff_thread_release_buffer(avctx, p);

  973. 

  974.     p->reference= 0;

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

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

  977.         return -1;

  978.     }

  979. 

  980.     if(s->context){

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

  982.         if(table_size < 0)

  983.             return -1;

  984.     }

  985. 

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

  987.         return -1;

  988. 

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

  990. 

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

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

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

  994. 

  995.     s->last_slice_end= 0;

  996. 

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

  998.         int y, cy;

  999.         int lefty, leftu, leftv;

  1000.         int lefttopy, lefttopu, lefttopv;

  1001. 

  1002.         if(s->yuy2){

  1003.             p->data[0][3]= get_bits(&s->gb, 8);

  1004.             p->data[0][2]= get_bits(&s->gb, 8);

  1005.             p->data[0][1]= get_bits(&s->gb, 8);

  1006.             p->data[0][0]= get_bits(&s->gb, 8);

  1007. 

  1008.             av_log(avctx, AV_LOG_ERROR, "YUY2 output is not implemented yet\n");

  1009.             return -1;

  1010.         }else{

  1011. 

  1012.             leftv= p->data[2][0]= get_bits(&s->gb, 8);

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

  1014.             leftu= p->data[1][0]= get_bits(&s->gb, 8);

  1015.                    p->data[0][0]= get_bits(&s->gb, 8);

  1016. 

  1017.             switch(s->predictor){

  1018.             case LEFT:

  1019.             case PLANE:

  1020.                 decode_422_bitstream(s, width-2);

  1021.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1022.                 if(!(s->flags&CODEC_FLAG_GRAY)){

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

  1024.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1025.                 }

  1026. 

  1027.                 for(cy=y=1; y<s->height; y++,cy++){

  1028.                     uint8_t *ydst, *udst, *vdst;

  1029. 

  1030.                     if(s->bitstream_bpp==12){

  1031.                         decode_gray_bitstream(s, width);

  1032. 

  1033.                         ydst= p->data[0] + p->linesize[0]*y;

  1034. 

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

  1036.                         if(s->predictor == PLANE){

  1037.                             if(y>s->interlaced)

  1038.                                 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

  1039.                         }

  1040.                         y++;

  1041.                         if(y>=s->height) break;

  1042.                     }

  1043. 

  1044.                     draw_slice(s, y);

  1045. 

  1046.                     ydst= p->data[0] + p->linesize[0]*y;

  1047.                     udst= p->data[1] + p->linesize[1]*cy;

  1048.                     vdst= p->data[2] + p->linesize[2]*cy;

  1049. 

  1050.                     decode_422_bitstream(s, width);

  1051.                     lefty= s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);

  1052.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1053.                         leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);

  1054.                         leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);

  1055.                     }

  1056.                     if(s->predictor == PLANE){

  1057.                         if(cy>s->interlaced){

  1058.                             s->dsp.add_bytes(ydst, ydst - fake_ystride, width);

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

  1060.                                 s->dsp.add_bytes(udst, udst - fake_ustride, width2);

  1061.                                 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);

  1062.                             }

  1063.                         }

  1064.                     }

  1065.                 }

  1066.                 draw_slice(s, height);

  1067. 

  1068.                 break;

  1069.             case MEDIAN:

  1070.                 /* first line except first 2 pixels is left predicted */

  1071.                 decode_422_bitstream(s, width-2);

  1072.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);

  1073.                 if(!(s->flags&CODEC_FLAG_GRAY)){

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

  1075.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2-1, leftv);

  1076.                 }

  1077. 

  1078.                 cy=y=1;

  1079. 

  1080.                 /* second line is left predicted for interlaced case */

  1081.                 if(s->interlaced){

  1082.                     decode_422_bitstream(s, width);

  1083.                     lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);

  1084.                     if(!(s->flags&CODEC_FLAG_GRAY)){

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

  1086.                         leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);

  1087.                     }

  1088.                     y++; cy++;

  1089.                 }

  1090. 

  1091.                 /* next 4 pixels are left predicted too */

  1092.                 decode_422_bitstream(s, 4);

  1093.                 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);

  1094.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1095.                     leftu= s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);

  1096.                     leftv= s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);

  1097.                 }

  1098. 

  1099.                 /* next line except the first 4 pixels is median predicted */

  1100.                 lefttopy= p->data[0][3];

  1101.                 decode_422_bitstream(s, width-4);

  1102.                 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);

  1103.                 if(!(s->flags&CODEC_FLAG_GRAY)){

  1104.                     lefttopu= p->data[1][1];

  1105.                     lefttopv= p->data[2][1];

  1106.                     s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);

  1107.                     s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);

  1108.                 }

  1109.                 y++; cy++;

  1110. 

  1111.                 for(; y<height; y++,cy++){

  1112.                     uint8_t *ydst, *udst, *vdst;

  1113. 

  1114.                     if(s->bitstream_bpp==12){

  1115.                         while(2*cy > y){

  1116.                             decode_gray_bitstream(s, width);

  1117.                             ydst= p->data[0] + p->linesize[0]*y;

  1118.                             s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1119.                             y++;

  1120.                         }

  1121.                         if(y>=height) break;

  1122.                     }

  1123.                     draw_slice(s, y);

  1124. 

  1125.                     decode_422_bitstream(s, width);

  1126. 

  1127.                     ydst= p->data[0] + p->linesize[0]*y;

  1128.                     udst= p->data[1] + p->linesize[1]*cy;

  1129.                     vdst= p->data[2] + p->linesize[2]*cy;

  1130. 

  1131.                     s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);

  1132.                     if(!(s->flags&CODEC_FLAG_GRAY)){

  1133.                         s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);

  1134.                         s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);

  1135.                     }

  1136.                 }

  1137. 

  1138.                 draw_slice(s, height);

  1139.                 break;

  1140.             }

  1141.         }

  1142.     }else{

  1143.         int y;

  1144.         int leftr, leftg, leftb, lefta;

  1145.         const int last_line= (height-1)*p->linesize[0];

  1146. 

  1147.         if(s->bitstream_bpp==32){

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

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

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

  1151.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1152.         }else{

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

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

  1155.             leftb= p->data[0][last_line+B]= get_bits(&s->gb, 8);

  1156.             lefta= p->data[0][last_line+A]= 255;

  1157.             skip_bits(&s->gb, 8);

  1158.         }

  1159. 

  1160.         if(s->bgr32){

  1161.             switch(s->predictor){

  1162.             case LEFT:

  1163.             case PLANE:

  1164.                 decode_bgr_bitstream(s, width-1);

  1165.                 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb, &lefta);

  1166. 

  1167.                 for(y=s->height-2; y>=0; y--){ //Yes it is stored upside down.

  1168.                     decode_bgr_bitstream(s, width);

  1169. 

  1170.                     s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);

  1171.                     if(s->predictor == PLANE){

  1172.                         if(s->bitstream_bpp!=32) lefta=0;

  1173.                         if((y&s->interlaced)==0 && y<s->height-1-s->interlaced){

  1174.                             s->dsp.add_bytes(p->data[0] + p->linesize[0]*y,

  1175.                                              p->data[0] + p->linesize[0]*y + fake_ystride, fake_ystride);

  1176.                         }

  1177.                     }

  1178.                 }

  1179.                 draw_slice(s, height); // just 1 large slice as this is not possible in reverse order

  1180.                 break;

  1181.             default:

  1182.                 av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n");

  1183.             }

  1184.         }else{

  1185. 

  1186.             av_log(avctx, AV_LOG_ERROR, "BGR24 output is not implemented yet\n");

  1187.             return -1;

  1188.         }

  1189.     }

  1190.     emms_c();

  1191. 

  1192.     *picture= *p;

  1193.     *data_size = sizeof(AVFrame);

  1194. 

  1195.     return (get_bits_count(&s->gb)+31)/32*4 + table_size;

  1196. }

  1197. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1198. 

  1199. static int common_end(HYuvContext *s){

  1200.     int i;

  1201. 

  1202.     for(i=0; i<3; i++){

  1203.         av_freep(&s->temp[i]);

  1204.     }

  1205.     return 0;

  1206. }

  1207. 

  1208. #if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER

  1209. static av_cold int decode_end(AVCodecContext *avctx)

  1210. {

  1211.     HYuvContext *s = avctx->priv_data;

  1212.     int i;

  1213. 

  1214.     if (s->picture.data[0])

  1215.         avctx->release_buffer(avctx, &s->picture);

  1216. 

  1217.     common_end(s);

  1218.     av_freep(&s->bitstream_buffer);

  1219. 

  1220.     for(i=0; i<6; i++){

  1221.         free_vlc(&s->vlc[i]);

  1222.     }

  1223. 

  1224.     return 0;

  1225. }

  1226. #endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */

  1227. 

  1228. #if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER

  1229. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1230.     HYuvContext *s = avctx->priv_data;

  1231.     AVFrame *pict = data;

  1232.     const int width= s->width;

  1233.     const int width2= s->width>>1;

  1234.     const int height= s->height;

  1235.     const int fake_ystride= s->interlaced ? pict->linesize[0]*2  : pict->linesize[0];

  1236.     const int fake_ustride= s->interlaced ? pict->linesize[1]*2  : pict->linesize[1];

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

  1238.     AVFrame * const p= &s->picture;

  1239.     int i, j, size=0;

  1240. 

  1241.     *p = *pict;

  1242.     p->pict_type= AV_PICTURE_TYPE_I;

  1243.     p->key_frame= 1;

  1244. 

  1245.     if(s->context){

  1246.         for(i=0; i<3; i++){

  1247.             generate_len_table(s->len[i], s->stats[i]);

  1248.             if(generate_bits_table(s->bits[i], s->len[i])<0)

  1249.                 return -1;

  1250.             size+= store_table(s, s->len[i], &buf[size]);

  1251.         }

  1252. 

  1253.         for(i=0; i<3; i++)

  1254.             for(j=0; j<256; j++)

  1255.                 s->stats[i][j] >>= 1;

  1256.     }

  1257. 

  1258.     init_put_bits(&s->pb, buf+size, buf_size-size);

  1259. 

  1260.     if(avctx->pix_fmt == PIX_FMT_YUV422P || avctx->pix_fmt == PIX_FMT_YUV420P){

  1261.         int lefty, leftu, leftv, y, cy;

  1262. 

  1263.         put_bits(&s->pb, 8, leftv= p->data[2][0]);

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

  1265.         put_bits(&s->pb, 8, leftu= p->data[1][0]);

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

  1267. 

  1268.         lefty= sub_left_prediction(s, s->temp[0], p->data[0], width , 0);

  1269.         leftu= sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);

  1270.         leftv= sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);

  1271. 

  1272.         encode_422_bitstream(s, 2, width-2);

  1273. 

  1274.         if(s->predictor==MEDIAN){

  1275.             int lefttopy, lefttopu, lefttopv;

  1276.             cy=y=1;

  1277.             if(s->interlaced){

  1278.                 lefty= sub_left_prediction(s, s->temp[0], p->data[0]+p->linesize[0], width , lefty);

  1279.                 leftu= sub_left_prediction(s, s->temp[1], p->data[1]+p->linesize[1], width2, leftu);

  1280.                 leftv= sub_left_prediction(s, s->temp[2], p->data[2]+p->linesize[2], width2, leftv);

  1281. 

  1282.                 encode_422_bitstream(s, 0, width);

  1283.                 y++; cy++;

  1284.             }

  1285. 

  1286.             lefty= sub_left_prediction(s, s->temp[0], p->data[0]+fake_ystride, 4, lefty);

  1287.             leftu= sub_left_prediction(s, s->temp[1], p->data[1]+fake_ustride, 2, leftu);

  1288.             leftv= sub_left_prediction(s, s->temp[2], p->data[2]+fake_vstride, 2, leftv);

  1289. 

  1290.             encode_422_bitstream(s, 0, 4);

  1291. 

  1292.             lefttopy= p->data[0][3];

  1293.             lefttopu= p->data[1][1];

  1294.             lefttopv= p->data[2][1];

  1295.             s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);

  1296.             s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);

  1297.             s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);

  1298.             encode_422_bitstream(s, 0, width-4);

  1299.             y++; cy++;

  1300. 

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

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

  1303. 

  1304.                 if(s->bitstream_bpp==12){

  1305.                     while(2*cy > y){

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

  1307.                         s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1308.                         encode_gray_bitstream(s, width);

  1309.                         y++;

  1310.                     }

  1311.                     if(y>=height) break;

  1312.                 }

  1313.                 ydst= p->data[0] + p->linesize[0]*y;

  1314.                 udst= p->data[1] + p->linesize[1]*cy;

  1315.                 vdst= p->data[2] + p->linesize[2]*cy;

  1316. 

  1317.                 s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);

  1318.                 s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);

  1319.                 s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);

  1320. 

  1321.                 encode_422_bitstream(s, 0, width);

  1322.             }

  1323.         }else{

  1324.             for(cy=y=1; y<height; y++,cy++){

  1325.                 uint8_t *ydst, *udst, *vdst;

  1326. 

  1327.                 /* encode a luma only line & y++ */

  1328.                 if(s->bitstream_bpp==12){

  1329.                     ydst= p->data[0] + p->linesize[0]*y;

  1330. 

  1331.                     if(s->predictor == PLANE && s->interlaced < y){

  1332.                         s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1333. 

  1334.                         lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1335.                     }else{

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

  1337.                     }

  1338.                     encode_gray_bitstream(s, width);

  1339.                     y++;

  1340.                     if(y>=height) break;

  1341.                 }

  1342. 

  1343.                 ydst= p->data[0] + p->linesize[0]*y;

  1344.                 udst= p->data[1] + p->linesize[1]*cy;

  1345.                 vdst= p->data[2] + p->linesize[2]*cy;

  1346. 

  1347.                 if(s->predictor == PLANE && s->interlaced < cy){

  1348.                     s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);

  1349.                     s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);

  1350.                     s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);

  1351. 

  1352.                     lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);

  1353.                     leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);

  1354.                     leftv= sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);

  1355.                 }else{

  1356.                     lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);

  1357.                     leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);

  1358.                     leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);

  1359.                 }

  1360. 

  1361.                 encode_422_bitstream(s, 0, width);

  1362.             }

  1363.         }

  1364.     }else if(avctx->pix_fmt == PIX_FMT_RGB32){

  1365.         uint8_t *data = p->data[0] + (height-1)*p->linesize[0];

  1366.         const int stride = -p->linesize[0];

  1367.         const int fake_stride = -fake_ystride;

  1368.         int y;

  1369.         int leftr, leftg, leftb;

  1370. 

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

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

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

  1374.         put_bits(&s->pb, 8, 0);

  1375. 

  1376.         sub_left_prediction_bgr32(s, s->temp[0], data+4, width-1, &leftr, &leftg, &leftb);

  1377.         encode_bgr_bitstream(s, width-1);

  1378. 

  1379.         for(y=1; y<s->height; y++){

  1380.             uint8_t *dst = data + y*stride;

  1381.             if(s->predictor == PLANE && s->interlaced < y){

  1382.                 s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width*4);

  1383.                 sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width, &leftr, &leftg, &leftb);

  1384.             }else{

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

  1386.             }

  1387.             encode_bgr_bitstream(s, width);

  1388.         }

  1389.     }else{

  1390.         av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");

  1391.     }

  1392.     emms_c();

  1393. 

  1394.     size+= (put_bits_count(&s->pb)+31)/8;

  1395.     put_bits(&s->pb, 16, 0);

  1396.     put_bits(&s->pb, 15, 0);

  1397.     size/= 4;

  1398. 

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

  1400.         int j;

  1401.         char *p= avctx->stats_out;

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

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

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

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

  1406.                 p+= strlen(p);

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

  1408.             }

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

  1410.             p++;

  1411.         }

  1412.     } else

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

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

  1415.         flush_put_bits(&s->pb);

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

  1417.     }

  1418. 

  1419.     s->picture_number++;

  1420. 

  1421.     return size*4;

  1422. }

  1423. 

  1424. static av_cold int encode_end(AVCodecContext *avctx)

  1425. {

  1426.     HYuvContext *s = avctx->priv_data;

  1427. 

  1428.     common_end(s);

  1429. 

  1430.     av_freep(&avctx->extradata);

  1431.     av_freep(&avctx->stats_out);

  1432. 

  1433.     return 0;

  1434. }

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

  1436. 

  1437. #if CONFIG_HUFFYUV_DECODER

  1438. AVCodec ff_huffyuv_decoder = {

  1439.     .name           = "huffyuv",

  1440.     .type           = AVMEDIA_TYPE_VIDEO,

  1441.     .id             = CODEC_ID_HUFFYUV,

  1442.     .priv_data_size = sizeof(HYuvContext),

  1443.     .init           = decode_init,

  1444.     .close          = decode_end,

  1445.     .decode         = decode_frame,

  1446.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1447.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1448.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1449. };

  1450. #endif

  1451. 

  1452. #if CONFIG_FFVHUFF_DECODER

  1453. AVCodec ff_ffvhuff_decoder = {

  1454.     .name           = "ffvhuff",

  1455.     .type           = AVMEDIA_TYPE_VIDEO,

  1456.     .id             = CODEC_ID_FFVHUFF,

  1457.     .priv_data_size = sizeof(HYuvContext),

  1458.     .init           = decode_init,

  1459.     .close          = decode_end,

  1460.     .decode         = decode_frame,

  1461.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,

  1462.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),

  1463.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1464. };

  1465. #endif

  1466. 

  1467. #if CONFIG_HUFFYUV_ENCODER

  1468. AVCodec ff_huffyuv_encoder = {

  1469.     .name           = "huffyuv",

  1470.     .type           = AVMEDIA_TYPE_VIDEO,

  1471.     .id             = CODEC_ID_HUFFYUV,

  1472.     .priv_data_size = sizeof(HYuvContext),

  1473.     .init           = encode_init,

  1474.     .encode         = encode_frame,

  1475.     .close          = encode_end,

  1476.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1477.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),

  1478. };

  1479. #endif

  1480. 

  1481. #if CONFIG_FFVHUFF_ENCODER

  1482. AVCodec ff_ffvhuff_encoder = {

  1483.     .name           = "ffvhuff",

  1484.     .type           = AVMEDIA_TYPE_VIDEO,

  1485.     .id             = CODEC_ID_FFVHUFF,

  1486.     .priv_data_size = sizeof(HYuvContext),

  1487.     .init           = encode_init,

  1488.     .encode         = encode_frame,

  1489.     .close          = encode_end,

  1490.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_RGB32, PIX_FMT_NONE},

  1491.     .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),

  1492. };

  1493. #endif