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.
26438 Commits
32 Branches
293MB
Tree: 672e7e391a
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '672e7e391a'
${ noResults }
FFmpeg/libavcodec/ffv1.c

1640 lines
52KB
Raw Blame History 

  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

  25.  * FF Video Codec 1 (a lossless codec)

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "get_bits.h"

  30. #include "put_bits.h"

  31. #include "dsputil.h"

  32. #include "rangecoder.h"

  33. #include "golomb.h"

  34. #include "mathops.h"

  35. #include "libavutil/avassert.h"

  36. 

  37. #define MAX_PLANES 4

  38. #define CONTEXT_SIZE 32

  39. 

  40. #define MAX_QUANT_TABLES 8

  41. #define MAX_CONTEXT_INPUTS 5

  42. 

  43. extern const uint8_t ff_log2_run[32];

  44. 

  45. static const int8_t quant3[256]={

  46.  0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  47.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  48.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  49.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  50.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  51.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  52.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  53.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  54. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  55. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  56. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  57. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  58. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  59. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  60. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  61. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0,

  62. };

  63. 

  64. static const int8_t quant5_10bit[256]={

  65.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

  66.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  67.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  68.  1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  69.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  70.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  71.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  72.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  73. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  74. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  75. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  76. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  77. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

  78. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  79. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  80. -1,-1,-1,-1,-1,-1,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  81. };

  82. 

  83. static const int8_t quant5[256]={

  84.  0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  85.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  86.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  87.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  88.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  89.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  90.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  91.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  92. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  93. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  94. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  95. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  96. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  97. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  98. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  99. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,

  100. };

  101. static const int8_t quant7[256]={

  102.  0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  103.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  104.  2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,

  105.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  106.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  107.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  108.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  109.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  110. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  111. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  112. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  113. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  114. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  115. -3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,

  116. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  117. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,

  118. };

  119. static const int8_t quant9[256]={

  120.  0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  121.  3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  122.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  123.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  124.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  125.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  126.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  127.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  128. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  129. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  130. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  131. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  132. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  133. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  134. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,

  135. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,

  136. };

  137. static const int8_t quant9_10bit[256]={

  138.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  139.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

  140.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  141.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

  142.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  143.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  144.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  145.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  146. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  147. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  148. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  149. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  150. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,

  151. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  152. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  153. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  154. };

  155. 

  156. static const int8_t quant11[256]={

  157.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

  158.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  159.  4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  160.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  161.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  162.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  163.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  164.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  165. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  166. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  167. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  168. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  169. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  170. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,

  171. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  172. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  173. };

  174. static const int8_t quant13[256]={

  175.  0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

  176.  4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  177.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  178.  5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  179.  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  180.  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  181.  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  182.  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  183. -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,

  184. -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,

  185. -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,

  186. -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,

  187. -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5,

  188. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  189. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  190. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,

  191. };

  192. 

  193. static const uint8_t ver2_state[256]= {

  194.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  195.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  196.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  197.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  198.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  199.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  200.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  201.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

  202.  165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  203.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  204.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  205.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  206.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  207.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  208.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  209.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  210. };

  211. 

  212. typedef struct VlcState{

  213.     int16_t drift;

  214.     uint16_t error_sum;

  215.     int8_t bias;

  216.     uint8_t count;

  217. } VlcState;

  218. 

  219. typedef struct PlaneContext{

  220.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  221.     int quant_table_index;

  222.     int context_count;

  223.     uint8_t (*state)[CONTEXT_SIZE];

  224.     VlcState *vlc_state;

  225.     uint8_t interlace_bit_state[2];

  226. } PlaneContext;

  227. 

  228. #define MAX_SLICES 256

  229. 

  230. typedef struct FFV1Context{

  231.     AVCodecContext *avctx;

  232.     RangeCoder c;

  233.     GetBitContext gb;

  234.     PutBitContext pb;

  235.     uint64_t rc_stat[256][2];

  236.     uint64_t (*rc_stat2[MAX_QUANT_TABLES])[32][2];

  237.     int version;

  238.     int width, height;

  239.     int chroma_h_shift, chroma_v_shift;

  240.     int flags;

  241.     int picture_number;

  242.     AVFrame picture;

  243.     int plane_count;

  244.     int ac;                              ///< 1=range coder <-> 0=golomb rice

  245.     PlaneContext plane[MAX_PLANES];

  246.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  247.     int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];

  248.     int context_count[MAX_QUANT_TABLES];

  249.     uint8_t state_transition[256];

  250.     int run_index;

  251.     int colorspace;

  252.     int_fast16_t *sample_buffer;

  253. 

  254.     int quant_table_count;

  255. 

  256.     DSPContext dsp;

  257. 

  258.     struct FFV1Context *slice_context[MAX_SLICES];

  259.     int slice_count;

  260.     int num_v_slices;

  261.     int num_h_slices;

  262.     int slice_width;

  263.     int slice_height;

  264.     int slice_x;

  265.     int slice_y;

  266. }FFV1Context;

  267. 

  268. static av_always_inline int fold(int diff, int bits){

  269.     if(bits==8)

  270.         diff= (int8_t)diff;

  271.     else{

  272.         diff+= 1<<(bits-1);

  273.         diff&=(1<<bits)-1;

  274.         diff-= 1<<(bits-1);

  275.     }

  276. 

  277.     return diff;

  278. }

  279. 

  280. static inline int predict(int_fast16_t *src, int_fast16_t *last){

  281.     const int LT= last[-1];

  282.     const int  T= last[ 0];

  283.     const int L =  src[-1];

  284. 

  285.     return mid_pred(L, L + T - LT, T);

  286. }

  287. 

  288. static inline int get_context(PlaneContext *p, int_fast16_t *src, int_fast16_t *last, int_fast16_t *last2){

  289.     const int LT= last[-1];

  290.     const int  T= last[ 0];

  291.     const int RT= last[ 1];

  292.     const int L =  src[-1];

  293. 

  294.     if(p->quant_table[3][127]){

  295.         const int TT= last2[0];

  296.         const int LL=  src[-2];

  297.         return p->quant_table[0][(L-LT) & 0xFF] + p->quant_table[1][(LT-T) & 0xFF] + p->quant_table[2][(T-RT) & 0xFF]

  298.               +p->quant_table[3][(LL-L) & 0xFF] + p->quant_table[4][(TT-T) & 0xFF];

  299.     }else

  300.         return p->quant_table[0][(L-LT) & 0xFF] + p->quant_table[1][(LT-T) & 0xFF] + p->quant_table[2][(T-RT) & 0xFF];

  301. }

  302. 

  303. static av_always_inline av_flatten void put_symbol_inline(RangeCoder *c, uint8_t *state, int v, int is_signed, uint64_t rc_stat[256][2], uint64_t rc_stat2[32][2]){

  304.     int i;

  305. 

  306. #define put_rac(C,S,B) \

  307. do{\

  308.     if(rc_stat){\

  309.     rc_stat[*(S)][B]++;\

  310.         rc_stat2[(S)-state][B]++;\

  311.     }\

  312.     put_rac(C,S,B);\

  313. }while(0)

  314. 

  315.     if(v){

  316.         const int a= FFABS(v);

  317.         const int e= av_log2(a);

  318.         put_rac(c, state+0, 0);

  319.         if(e<=9){

  320.             for(i=0; i<e; i++){

  321.                 put_rac(c, state+1+i, 1);  //1..10

  322.             }

  323.             put_rac(c, state+1+i, 0);

  324. 

  325.             for(i=e-1; i>=0; i--){

  326.                 put_rac(c, state+22+i, (a>>i)&1); //22..31

  327.             }

  328. 

  329.             if(is_signed)

  330.                 put_rac(c, state+11 + e, v < 0); //11..21

  331.         }else{

  332.             for(i=0; i<e; i++){

  333.                 put_rac(c, state+1+FFMIN(i,9), 1);  //1..10

  334.             }

  335.             put_rac(c, state+1+9, 0);

  336. 

  337.             for(i=e-1; i>=0; i--){

  338.                 put_rac(c, state+22+FFMIN(i,9), (a>>i)&1); //22..31

  339.             }

  340. 

  341.             if(is_signed)

  342.                 put_rac(c, state+11 + 10, v < 0); //11..21

  343.         }

  344.     }else{

  345.         put_rac(c, state+0, 1);

  346.     }

  347. #undef put_rac

  348. }

  349. 

  350. static void av_noinline put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){

  351.     put_symbol_inline(c, state, v, is_signed, NULL, NULL);

  352. }

  353. 

  354. static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, int is_signed){

  355.     if(get_rac(c, state+0))

  356.         return 0;

  357.     else{

  358.         int i, e, a;

  359.         e= 0;

  360.         while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10

  361.             e++;

  362.         }

  363. 

  364.         a= 1;

  365.         for(i=e-1; i>=0; i--){

  366.             a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31

  367.         }

  368. 

  369.         e= -(is_signed && get_rac(c, state+11 + FFMIN(e, 10))); //11..21

  370.         return (a^e)-e;

  371.     }

  372. }

  373. 

  374. static int av_noinline get_symbol(RangeCoder *c, uint8_t *state, int is_signed){

  375.     return get_symbol_inline(c, state, is_signed);

  376. }

  377. 

  378. static inline void update_vlc_state(VlcState * const state, const int v){

  379.     int drift= state->drift;

  380.     int count= state->count;

  381.     state->error_sum += FFABS(v);

  382.     drift += v;

  383. 

  384.     if(count == 128){ //FIXME variable

  385.         count >>= 1;

  386.         drift >>= 1;

  387.         state->error_sum >>= 1;

  388.     }

  389.     count++;

  390. 

  391.     if(drift <= -count){

  392.         if(state->bias > -128) state->bias--;

  393. 

  394.         drift += count;

  395.         if(drift <= -count)

  396.             drift= -count + 1;

  397.     }else if(drift > 0){

  398.         if(state->bias <  127) state->bias++;

  399. 

  400.         drift -= count;

  401.         if(drift > 0)

  402.             drift= 0;

  403.     }

  404. 

  405.     state->drift= drift;

  406.     state->count= count;

  407. }

  408. 

  409. static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v, int bits){

  410.     int i, k, code;

  411. //printf("final: %d ", v);

  412.     v = fold(v - state->bias, bits);

  413. 

  414.     i= state->count;

  415.     k=0;

  416.     while(i < state->error_sum){ //FIXME optimize

  417.         k++;

  418.         i += i;

  419.     }

  420. 

  421.     assert(k<=8);

  422. 

  423. #if 0 // JPEG LS

  424.     if(k==0 && 2*state->drift <= - state->count) code= v ^ (-1);

  425.     else                                         code= v;

  426. #else

  427.      code= v ^ ((2*state->drift + state->count)>>31);

  428. #endif

  429. 

  430. //printf("v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code, state->bias, state->error_sum, state->drift, state->count, k);

  431.     set_sr_golomb(pb, code, k, 12, bits);

  432. 

  433.     update_vlc_state(state, v);

  434. }

  435. 

  436. static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int bits){

  437.     int k, i, v, ret;

  438. 

  439.     i= state->count;

  440.     k=0;

  441.     while(i < state->error_sum){ //FIXME optimize

  442.         k++;

  443.         i += i;

  444.     }

  445. 

  446.     assert(k<=8);

  447. 

  448.     v= get_sr_golomb(gb, k, 12, bits);

  449. //printf("v:%d bias:%d error:%d drift:%d count:%d k:%d", v, state->bias, state->error_sum, state->drift, state->count, k);

  450. 

  451. #if 0 // JPEG LS

  452.     if(k==0 && 2*state->drift <= - state->count) v ^= (-1);

  453. #else

  454.      v ^= ((2*state->drift + state->count)>>31);

  455. #endif

  456. 

  457.     ret= fold(v + state->bias, bits);

  458. 

  459.     update_vlc_state(state, v);

  460. //printf("final: %d\n", ret);

  461.     return ret;

  462. }

  463. 

  464. #if CONFIG_FFV1_ENCODER

  465. static av_always_inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){

  466.     PlaneContext * const p= &s->plane[plane_index];

  467.     RangeCoder * const c= &s->c;

  468.     int x;

  469.     int run_index= s->run_index;

  470.     int run_count=0;

  471.     int run_mode=0;

  472. 

  473.     if(s->ac){

  474.         if(c->bytestream_end - c->bytestream < w*20){

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

  476.             return -1;

  477.         }

  478.     }else{

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

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

  481.             return -1;

  482.         }

  483.     }

  484. 

  485.     for(x=0; x<w; x++){

  486.         int diff, context;

  487. 

  488.         context= get_context(p, sample[0]+x, sample[1]+x, sample[2]+x);

  489.         diff= sample[0][x] - predict(sample[0]+x, sample[1]+x);

  490. 

  491.         if(context < 0){

  492.             context = -context;

  493.             diff= -diff;

  494.         }

  495. 

  496.         diff= fold(diff, bits);

  497. 

  498.         if(s->ac){

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

  500.                 put_symbol_inline(c, p->state[context], diff, 1, s->rc_stat, s->rc_stat2[p->quant_table_index][context]);

  501.             }else{

  502.                 put_symbol_inline(c, p->state[context], diff, 1, NULL, NULL);

  503.             }

  504.         }else{

  505.             if(context == 0) run_mode=1;

  506. 

  507.             if(run_mode){

  508. 

  509.                 if(diff){

  510.                     while(run_count >= 1<<ff_log2_run[run_index]){

  511.                         run_count -= 1<<ff_log2_run[run_index];

  512.                         run_index++;

  513.                         put_bits(&s->pb, 1, 1);

  514.                     }

  515. 

  516.                     put_bits(&s->pb, 1 + ff_log2_run[run_index], run_count);

  517.                     if(run_index) run_index--;

  518.                     run_count=0;

  519.                     run_mode=0;

  520.                     if(diff>0) diff--;

  521.                 }else{

  522.                     run_count++;

  523.                 }

  524.             }

  525. 

  526. //            printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, (int)put_bits_count(&s->pb));

  527. 

  528.             if(run_mode == 0)

  529.                 put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits);

  530.         }

  531.     }

  532.     if(run_mode){

  533.         while(run_count >= 1<<ff_log2_run[run_index]){

  534.             run_count -= 1<<ff_log2_run[run_index];

  535.             run_index++;

  536.             put_bits(&s->pb, 1, 1);

  537.         }

  538. 

  539.         if(run_count)

  540.             put_bits(&s->pb, 1, 1);

  541.     }

  542.     s->run_index= run_index;

  543. 

  544.     return 0;

  545. }

  546. 

  547. static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  548.     int x,y,i;

  549.     const int ring_size= s->avctx->context_model ? 3 : 2;

  550.     int_fast16_t *sample[3];

  551.     s->run_index=0;

  552. 

  553.     memset(s->sample_buffer, 0, ring_size*(w+6)*sizeof(*s->sample_buffer));

  554. 

  555.     for(y=0; y<h; y++){

  556.         for(i=0; i<ring_size; i++)

  557.             sample[i]= s->sample_buffer + (w+6)*((h+i-y)%ring_size) + 3;

  558. 

  559.         sample[0][-1]= sample[1][0  ];

  560.         sample[1][ w]= sample[1][w-1];

  561. //{START_TIMER

  562.         if(s->avctx->bits_per_raw_sample<=8){

  563.             for(x=0; x<w; x++){

  564.                 sample[0][x]= src[x + stride*y];

  565.             }

  566.             encode_line(s, w, sample, plane_index, 8);

  567.         }else{

  568.             for(x=0; x<w; x++){

  569.                 sample[0][x]= ((uint16_t*)(src + stride*y))[x] >> (16 - s->avctx->bits_per_raw_sample);

  570.             }

  571.             encode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  572.         }

  573. //STOP_TIMER("encode line")}

  574.     }

  575. }

  576. 

  577. static void encode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  578.     int x, y, p, i;

  579.     const int ring_size= s->avctx->context_model ? 3 : 2;

  580.     int_fast16_t *sample[3][3];

  581.     s->run_index=0;

  582. 

  583.     memset(s->sample_buffer, 0, ring_size*3*(w+6)*sizeof(*s->sample_buffer));

  584. 

  585.     for(y=0; y<h; y++){

  586.         for(i=0; i<ring_size; i++)

  587.             for(p=0; p<3; p++)

  588.                 sample[p][i]= s->sample_buffer + p*ring_size*(w+6) + ((h+i-y)%ring_size)*(w+6) + 3;

  589. 

  590.         for(x=0; x<w; x++){

  591.             int v= src[x + stride*y];

  592.             int b= v&0xFF;

  593.             int g= (v>>8)&0xFF;

  594.             int r= (v>>16)&0xFF;

  595. 

  596.             b -= g;

  597.             r -= g;

  598.             g += (b + r)>>2;

  599.             b += 0x100;

  600.             r += 0x100;

  601. 

  602. //            assert(g>=0 && b>=0 && r>=0);

  603. //            assert(g<256 && b<512 && r<512);

  604.             sample[0][0][x]= g;

  605.             sample[1][0][x]= b;

  606.             sample[2][0][x]= r;

  607.         }

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

  609.             sample[p][0][-1]= sample[p][1][0  ];

  610.             sample[p][1][ w]= sample[p][1][w-1];

  611.             encode_line(s, w, sample[p], FFMIN(p, 1), 9);

  612.         }

  613.     }

  614. }

  615. 

  616. static void write_quant_table(RangeCoder *c, int16_t *quant_table){

  617.     int last=0;

  618.     int i;

  619.     uint8_t state[CONTEXT_SIZE];

  620.     memset(state, 128, sizeof(state));

  621. 

  622.     for(i=1; i<128 ; i++){

  623.         if(quant_table[i] != quant_table[i-1]){

  624.             put_symbol(c, state, i-last-1, 0);

  625.             last= i;

  626.         }

  627.     }

  628.     put_symbol(c, state, i-last-1, 0);

  629. }

  630. 

  631. static void write_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  632.     int i;

  633.     for(i=0; i<5; i++)

  634.         write_quant_table(c, quant_table[i]);

  635. }

  636. 

  637. static void write_header(FFV1Context *f){

  638.     uint8_t state[CONTEXT_SIZE];

  639.     int i, j;

  640.     RangeCoder * const c= &f->slice_context[0]->c;

  641. 

  642.     memset(state, 128, sizeof(state));

  643. 

  644.     if(f->version < 2){

  645.         put_symbol(c, state, f->version, 0);

  646.         put_symbol(c, state, f->ac, 0);

  647.         if(f->ac>1){

  648.             for(i=1; i<256; i++){

  649.                 put_symbol(c, state, f->state_transition[i] - c->one_state[i], 1);

  650.             }

  651.         }

  652.         put_symbol(c, state, f->colorspace, 0); //YUV cs type

  653.         if(f->version>0)

  654.             put_symbol(c, state, f->avctx->bits_per_raw_sample, 0);

  655.         put_rac(c, state, 1); //chroma planes

  656.             put_symbol(c, state, f->chroma_h_shift, 0);

  657.             put_symbol(c, state, f->chroma_v_shift, 0);

  658.         put_rac(c, state, 0); //no transparency plane

  659. 

  660.         write_quant_tables(c, f->quant_table);

  661.     }else{

  662.         put_symbol(c, state, f->slice_count, 0);

  663.         for(i=0; i<f->slice_count; i++){

  664.             FFV1Context *fs= f->slice_context[i];

  665.             put_symbol(c, state, (fs->slice_x     +1)*f->num_h_slices / f->width   , 0);

  666.             put_symbol(c, state, (fs->slice_y     +1)*f->num_v_slices / f->height  , 0);

  667.             put_symbol(c, state, (fs->slice_width +1)*f->num_h_slices / f->width -1, 0);

  668.             put_symbol(c, state, (fs->slice_height+1)*f->num_v_slices / f->height-1, 0);

  669.             for(j=0; j<f->plane_count; j++){

  670.                 put_symbol(c, state, f->plane[j].quant_table_index, 0);

  671.                 av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);

  672.             }

  673.         }

  674.     }

  675. }

  676. #endif /* CONFIG_FFV1_ENCODER */

  677. 

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

  679.     FFV1Context *s = avctx->priv_data;

  680. 

  681.     s->avctx= avctx;

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

  683. 

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

  685. 

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

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

  688. 

  689.     assert(s->width && s->height);

  690.     //defaults

  691.     s->num_h_slices=1;

  692.     s->num_v_slices=1;

  693. 

  694. 

  695.     return 0;

  696. }

  697. 

  698. static int init_slice_state(FFV1Context *f){

  699.     int i, j;

  700. 

  701.     for(i=0; i<f->slice_count; i++){

  702.         FFV1Context *fs= f->slice_context[i];

  703.         for(j=0; j<f->plane_count; j++){

  704.             PlaneContext * const p= &fs->plane[j];

  705. 

  706.             if(fs->ac){

  707.                 if(!p->    state) p->    state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t));

  708.                 if(!p->    state)

  709.                     return AVERROR(ENOMEM);

  710.             }else{

  711.                 if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));

  712.                 if(!p->vlc_state)

  713.                     return AVERROR(ENOMEM);

  714.             }

  715.         }

  716. 

  717.         if (fs->ac>1){

  718.             //FIXME only redo if state_transition changed

  719.             for(j=1; j<256; j++){

  720.                 fs->c.one_state [    j]= fs->state_transition[j];

  721.                 fs->c.zero_state[256-j]= 256-fs->c.one_state [j];

  722.             }

  723.         }

  724.     }

  725. 

  726.     return 0;

  727. }

  728. 

  729. static av_cold int init_slice_contexts(FFV1Context *f){

  730.     int i;

  731. 

  732.     f->slice_count= f->num_h_slices * f->num_v_slices;

  733. 

  734.     for(i=0; i<f->slice_count; i++){

  735.         FFV1Context *fs= av_mallocz(sizeof(*fs));

  736.         int sx= i % f->num_h_slices;

  737.         int sy= i / f->num_h_slices;

  738.         int sxs= f->avctx->width * sx    / f->num_h_slices;

  739.         int sxe= f->avctx->width *(sx+1) / f->num_h_slices;

  740.         int sys= f->avctx->height* sy    / f->num_v_slices;

  741.         int sye= f->avctx->height*(sy+1) / f->num_v_slices;

  742.         f->slice_context[i]= fs;

  743.         memcpy(fs, f, sizeof(*fs));

  744. 

  745.         fs->slice_width = sxe - sxs;

  746.         fs->slice_height= sye - sys;

  747.         fs->slice_x     = sxs;

  748.         fs->slice_y     = sys;

  749. 

  750.         fs->sample_buffer = av_malloc(6 * (fs->width+6) * sizeof(*fs->sample_buffer));

  751.         if (!fs->sample_buffer)

  752.             return AVERROR(ENOMEM);

  753.     }

  754.     return 0;

  755. }

  756. 

  757. #if CONFIG_FFV1_ENCODER

  758. static int write_extra_header(FFV1Context *f){

  759.     RangeCoder * const c= &f->c;

  760.     uint8_t state[CONTEXT_SIZE];

  761.     int i;

  762.     memset(state, 128, sizeof(state));

  763. 

  764.     f->avctx->extradata= av_malloc(f->avctx->extradata_size= 10000);

  765.     ff_init_range_encoder(c, f->avctx->extradata, f->avctx->extradata_size);

  766.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  767. 

  768.     put_symbol(c, state, f->version, 0);

  769.     put_symbol(c, state, f->ac, 0);

  770.     if(f->ac>1){

  771.         for(i=1; i<256; i++){

  772.             put_symbol(c, state, f->state_transition[i] - c->one_state[i], 1);

  773.         }

  774.     }

  775.     put_symbol(c, state, f->colorspace, 0); //YUV cs type

  776.     put_symbol(c, state, f->avctx->bits_per_raw_sample, 0);

  777.     put_rac(c, state, 1); //chroma planes

  778.         put_symbol(c, state, f->chroma_h_shift, 0);

  779.         put_symbol(c, state, f->chroma_v_shift, 0);

  780.     put_rac(c, state, 0); //no transparency plane

  781.     put_symbol(c, state, f->num_h_slices-1, 0);

  782.     put_symbol(c, state, f->num_v_slices-1, 0);

  783. 

  784.     put_symbol(c, state, f->quant_table_count, 0);

  785.     for(i=0; i<f->quant_table_count; i++)

  786.         write_quant_tables(c, f->quant_tables[i]);

  787. 

  788.     f->avctx->extradata_size= ff_rac_terminate(c);

  789. 

  790.     return 0;

  791. }

  792. 

  793. static int sort_stt(FFV1Context *s, uint8_t stt[256]){

  794.     int i,i2,changed,print=0;

  795. 

  796.     do{

  797.         changed=0;

  798.         for(i=12; i<244; i++){

  799.             for(i2=i+1; i2<245 && i2<i+4; i2++){

  800. #define COST(old, new) \

  801.     s->rc_stat[old][0]*-log2((256-(new))/256.0)\

  802.    +s->rc_stat[old][1]*-log2(     (new) /256.0)

  803. 

  804. #define COST2(old, new) \

  805.     COST(old, new)\

  806.    +COST(256-(old), 256-(new))

  807. 

  808.                 double size0= COST2(i, i ) + COST2(i2, i2);

  809.                 double sizeX= COST2(i, i2) + COST2(i2, i );

  810.                 if(sizeX < size0 && i!=128 && i2!=128){

  811.                     int j;

  812.                     FFSWAP(int, stt[    i], stt[    i2]);

  813.                     FFSWAP(int, s->rc_stat[i    ][0],s->rc_stat[    i2][0]);

  814.                     FFSWAP(int, s->rc_stat[i    ][1],s->rc_stat[    i2][1]);

  815.                     if(i != 256-i2){

  816.                         FFSWAP(int, stt[256-i], stt[256-i2]);

  817.                         FFSWAP(int, s->rc_stat[256-i][0],s->rc_stat[256-i2][0]);

  818.                         FFSWAP(int, s->rc_stat[256-i][1],s->rc_stat[256-i2][1]);

  819.                     }

  820.                     for(j=1; j<256; j++){

  821.                         if     (stt[j] == i ) stt[j] = i2;

  822.                         else if(stt[j] == i2) stt[j] = i ;

  823.                         if(i != 256-i2){

  824.                             if     (stt[256-j] == 256-i ) stt[256-j] = 256-i2;

  825.                             else if(stt[256-j] == 256-i2) stt[256-j] = 256-i ;

  826.                         }

  827.                     }

  828.                     print=changed=1;

  829.                 }

  830.             }

  831.         }

  832.     }while(changed);

  833.     return print;

  834. }

  835. 

  836. static av_cold int encode_init(AVCodecContext *avctx)

  837. {

  838.     FFV1Context *s = avctx->priv_data;

  839.     int i, j;

  840. 

  841.     common_init(avctx);

  842. 

  843.     s->version=0;

  844.     s->ac= avctx->coder_type ? 2:0;

  845. 

  846.     if(s->ac>1)

  847.         for(i=1; i<256; i++)

  848.             s->state_transition[i]=ver2_state[i];

  849. 

  850.     s->plane_count=2;

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

  852.         s->quant_table_count=2;

  853.         if(avctx->bits_per_raw_sample <=8){

  854.             s->quant_tables[0][0][i]=           quant11[i];

  855.             s->quant_tables[0][1][i]=        11*quant11[i];

  856.             s->quant_tables[0][2][i]=     11*11*quant11[i];

  857.             s->quant_tables[1][0][i]=           quant11[i];

  858.             s->quant_tables[1][1][i]=        11*quant11[i];

  859.             s->quant_tables[1][2][i]=     11*11*quant5 [i];

  860.             s->quant_tables[1][3][i]=   5*11*11*quant5 [i];

  861.             s->quant_tables[1][4][i]= 5*5*11*11*quant5 [i];

  862.         }else{

  863.             s->quant_tables[0][0][i]=           quant9_10bit[i];

  864.             s->quant_tables[0][1][i]=        11*quant9_10bit[i];

  865.             s->quant_tables[0][2][i]=     11*11*quant9_10bit[i];

  866.             s->quant_tables[1][0][i]=           quant9_10bit[i];

  867.             s->quant_tables[1][1][i]=        11*quant9_10bit[i];

  868.             s->quant_tables[1][2][i]=     11*11*quant5_10bit[i];

  869.             s->quant_tables[1][3][i]=   5*11*11*quant5_10bit[i];

  870.             s->quant_tables[1][4][i]= 5*5*11*11*quant5_10bit[i];

  871.         }

  872.     }

  873.     s->context_count[0]= (11*11*11+1)/2;

  874.     s->context_count[1]= (11*11*5*5*5+1)/2;

  875.     memcpy(s->quant_table, s->quant_tables[avctx->context_model], sizeof(s->quant_table));

  876. 

  877.     for(i=0; i<s->plane_count; i++){

  878.         PlaneContext * const p= &s->plane[i];

  879. 

  880.         memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));

  881.         p->quant_table_index= avctx->context_model;

  882.         p->context_count= s->context_count[p->quant_table_index];

  883.     }

  884. 

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

  886.     switch(avctx->pix_fmt){

  887.     case PIX_FMT_YUV444P16:

  888.     case PIX_FMT_YUV422P16:

  889.     case PIX_FMT_YUV420P16:

  890.         if(avctx->bits_per_raw_sample <=8){

  891.             av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample invalid\n");

  892.             return -1;

  893.         }

  894.         if(!s->ac){

  895.             av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample of more than 8 needs -coder 1 currently\n");

  896.             return -1;

  897.         }

  898.         s->version= FFMAX(s->version, 1);

  899.     case PIX_FMT_YUV444P:

  900.     case PIX_FMT_YUV422P:

  901.     case PIX_FMT_YUV420P:

  902.     case PIX_FMT_YUV411P:

  903.     case PIX_FMT_YUV410P:

  904.         s->colorspace= 0;

  905.         break;

  906.     case PIX_FMT_RGB32:

  907.         s->colorspace= 1;

  908.         break;

  909.     default:

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

  911.         return -1;

  912.     }

  913.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  914. 

  915.     s->picture_number=0;

  916. 

  917.     if(avctx->stats_in){

  918.         char *p= avctx->stats_in;

  919. 

  920.         for(;;){

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

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

  923.                     char *next;

  924.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  925.                     if(next==p){

  926.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  927.                         return -1;

  928.                     }

  929.                     p=next;

  930.                 }

  931.             }

  932.             while(*p=='\n' || *p==' ') p++;

  933.             if(p[0]==0) break;

  934.         }

  935.         sort_stt(s, s->state_transition);

  936.     }

  937. 

  938.     if(s->version>1){

  939.         s->num_h_slices=2;

  940.         s->num_v_slices=2;

  941.         write_extra_header(s);

  942.     }

  943. 

  944.     if(init_slice_contexts(s) < 0)

  945.         return -1;

  946.     if(init_slice_state(s) < 0)

  947.         return -1;

  948. 

  949. #define STATS_OUT_SIZE 1024*30

  950.     if(avctx->flags & CODEC_FLAG_PASS1){

  951.     avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  952.         for(i=0; i<s->quant_table_count; i++){

  953.             for(j=0; j<s->slice_count; j++){

  954.                 FFV1Context *sf= s->slice_context[j];

  955.                 av_assert0(!sf->rc_stat2[i]);

  956.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  957.                 if(!sf->rc_stat2[i])

  958.                     return AVERROR(ENOMEM);

  959.             }

  960.         }

  961.     }

  962. 

  963.     return 0;

  964. }

  965. #endif /* CONFIG_FFV1_ENCODER */

  966. 

  967. 

  968. static void clear_state(FFV1Context *f){

  969.     int i, si, j;

  970. 

  971.     for(si=0; si<f->slice_count; si++){

  972.         FFV1Context *fs= f->slice_context[si];

  973.         for(i=0; i<f->plane_count; i++){

  974.             PlaneContext *p= &fs->plane[i];

  975. 

  976.             p->interlace_bit_state[0]= 128;

  977.             p->interlace_bit_state[1]= 128;

  978. 

  979.             if(fs->ac){

  980.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  981.             }else{

  982.             for(j=0; j<p->context_count; j++){

  983.                     p->vlc_state[j].drift= 0;

  984.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  985.                     p->vlc_state[j].bias= 0;

  986.                     p->vlc_state[j].count= 1;

  987.             }

  988.             }

  989.         }

  990.     }

  991. }

  992. 

  993. #if CONFIG_FFV1_ENCODER

  994. static int encode_slice(AVCodecContext *c, void *arg){

  995.     FFV1Context *fs= *(void**)arg;

  996.     FFV1Context *f= fs->avctx->priv_data;

  997.     int width = fs->slice_width;

  998.     int height= fs->slice_height;

  999.     int x= fs->slice_x;

  1000.     int y= fs->slice_y;

  1001.     AVFrame * const p= &f->picture;

  1002. 

  1003.     if(f->colorspace==0){

  1004.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1005.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1006.         const int cx= x>>f->chroma_h_shift;

  1007.         const int cy= y>>f->chroma_v_shift;

  1008. 

  1009.         encode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1010. 

  1011.         encode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1012.         encode_plane(fs, p->data[2] + cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1013.     }else{

  1014.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1015.     }

  1016.     emms_c();

  1017. 

  1018.     return 0;

  1019. }

  1020. 

  1021. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1022.     FFV1Context *f = avctx->priv_data;

  1023.     RangeCoder * const c= &f->slice_context[0]->c;

  1024.     AVFrame *pict = data;

  1025.     AVFrame * const p= &f->picture;

  1026.     int used_count= 0;

  1027.     uint8_t keystate=128;

  1028.     uint8_t *buf_p;

  1029.     int i;

  1030. 

  1031.     ff_init_range_encoder(c, buf, buf_size);

  1032.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1033. 

  1034.     *p = *pict;

  1035.     p->pict_type= FF_I_TYPE;

  1036. 

  1037.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1038.         put_rac(c, &keystate, 1);

  1039.         p->key_frame= 1;

  1040.         write_header(f);

  1041.         clear_state(f);

  1042.     }else{

  1043.         put_rac(c, &keystate, 0);

  1044.         p->key_frame= 0;

  1045.     }

  1046. 

  1047.     if(!f->ac){

  1048.         used_count += ff_rac_terminate(c);

  1049. //printf("pos=%d\n", used_count);

  1050.         init_put_bits(&f->slice_context[0]->pb, buf + used_count, buf_size - used_count);

  1051.     }else if (f->ac>1){

  1052.         int i;

  1053.         for(i=1; i<256; i++){

  1054.             c->one_state[i]= f->state_transition[i];

  1055.             c->zero_state[256-i]= 256-c->one_state[i];

  1056.         }

  1057.     }

  1058. 

  1059.     for(i=1; i<f->slice_count; i++){

  1060.         FFV1Context *fs= f->slice_context[i];

  1061.         uint8_t *start= buf + (buf_size-used_count)*i/f->slice_count;

  1062.         int len= buf_size/f->slice_count;

  1063. 

  1064.         if(fs->ac){

  1065.             ff_init_range_encoder(&fs->c, start, len);

  1066.         }else{

  1067.             init_put_bits(&fs->pb, start, len);

  1068.         }

  1069.     }

  1070.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1071. 

  1072.     buf_p=buf;

  1073.     for(i=0; i<f->slice_count; i++){

  1074.         FFV1Context *fs= f->slice_context[i];

  1075.         int bytes;

  1076. 

  1077.         if(fs->ac){

  1078.             uint8_t state=128;

  1079.             put_rac(&fs->c, &state, 0);

  1080.             bytes= ff_rac_terminate(&fs->c);

  1081.         }else{

  1082.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1083.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1084.             used_count= 0;

  1085.         }

  1086.         if(i>0){

  1087.             av_assert0(bytes < buf_size/f->slice_count);

  1088.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1089.             av_assert0(bytes < (1<<24));

  1090.             AV_WB24(buf_p+bytes, bytes);

  1091.             bytes+=3;

  1092.         }

  1093.         buf_p += bytes;

  1094.     }

  1095. 

  1096.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1097.         int j;

  1098.         char *p= avctx->stats_out;

  1099.         char *end= p + STATS_OUT_SIZE;

  1100. 

  1101.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1102.         for(j=0; j<f->slice_count; j++){

  1103.             FFV1Context *fs= f->slice_context[j];

  1104.             for(i=0; i<256; i++){

  1105.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1106.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1107.             }

  1108.         }

  1109. 

  1110.         for(j=0; j<256; j++){

  1111.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1112.             p+= strlen(p);

  1113.         }

  1114.         snprintf(p, end-p, "\n");

  1115.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1116.         avctx->stats_out[0] = '\0';

  1117. 

  1118.     f->picture_number++;

  1119.     return buf_p-buf;

  1120. }

  1121. #endif /* CONFIG_FFV1_ENCODER */

  1122. 

  1123. static av_cold int common_end(AVCodecContext *avctx){

  1124.     FFV1Context *s = avctx->priv_data;

  1125.     int i, j;

  1126. 

  1127.     for(j=0; j<s->slice_count; j++){

  1128.         FFV1Context *fs= s->slice_context[j];

  1129.         for(i=0; i<s->plane_count; i++){

  1130.             PlaneContext *p= &fs->plane[i];

  1131. 

  1132.             av_freep(&p->state);

  1133.             av_freep(&p->vlc_state);

  1134.         }

  1135.         av_freep(&fs->sample_buffer);

  1136.     }

  1137. 

  1138.     av_freep(&avctx->stats_out);

  1139.     for(j=0; j<s->quant_table_count; j++){

  1140.         for(i=0; i<s->slice_count; i++){

  1141.             FFV1Context *sf= s->slice_context[i];

  1142.             av_freep(&sf->rc_stat2[j]);

  1143.         }

  1144.     }

  1145. 

  1146.     return 0;

  1147. }

  1148. 

  1149. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){

  1150.     PlaneContext * const p= &s->plane[plane_index];

  1151.     RangeCoder * const c= &s->c;

  1152.     int x;

  1153.     int run_count=0;

  1154.     int run_mode=0;

  1155.     int run_index= s->run_index;

  1156. 

  1157.     for(x=0; x<w; x++){

  1158.         int diff, context, sign;

  1159. 

  1160.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1161.         if(context < 0){

  1162.             context= -context;

  1163.             sign=1;

  1164.         }else

  1165.             sign=0;

  1166. 

  1167.         av_assert2(context < p->context_count);

  1168. 

  1169.         if(s->ac){

  1170.             diff= get_symbol_inline(c, p->state[context], 1);

  1171.         }else{

  1172.             if(context == 0 && run_mode==0) run_mode=1;

  1173. 

  1174.             if(run_mode){

  1175.                 if(run_count==0 && run_mode==1){

  1176.                     if(get_bits1(&s->gb)){

  1177.                         run_count = 1<<ff_log2_run[run_index];

  1178.                         if(x + run_count <= w) run_index++;

  1179.                     }else{

  1180.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1181.                         else run_count=0;

  1182.                         if(run_index) run_index--;

  1183.                         run_mode=2;

  1184.                     }

  1185.                 }

  1186.                 run_count--;

  1187.                 if(run_count < 0){

  1188.                     run_mode=0;

  1189.                     run_count=0;

  1190.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1191.                     if(diff>=0) diff++;

  1192.                 }else

  1193.                     diff=0;

  1194.             }else

  1195.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1196. 

  1197. //            printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, get_bits_count(&s->gb));

  1198.         }

  1199. 

  1200.         if(sign) diff= -diff;

  1201. 

  1202.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1203.     }

  1204.     s->run_index= run_index;

  1205. }

  1206. 

  1207. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1208.     int x, y;

  1209.     int_fast16_t *sample[2];

  1210.     sample[0]=s->sample_buffer    +3;

  1211.     sample[1]=s->sample_buffer+w+6+3;

  1212. 

  1213.     s->run_index=0;

  1214. 

  1215.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1216. 

  1217.     for(y=0; y<h; y++){

  1218.         int_fast16_t *temp= sample[0]; //FIXME try a normal buffer

  1219. 

  1220.         sample[0]= sample[1];

  1221.         sample[1]= temp;

  1222. 

  1223.         sample[1][-1]= sample[0][0  ];

  1224.         sample[0][ w]= sample[0][w-1];

  1225. 

  1226. //{START_TIMER

  1227.         if(s->avctx->bits_per_raw_sample <= 8){

  1228.             decode_line(s, w, sample, plane_index, 8);

  1229.             for(x=0; x<w; x++){

  1230.                 src[x + stride*y]= sample[1][x];

  1231.             }

  1232.         }else{

  1233.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1234.             for(x=0; x<w; x++){

  1235.                 ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1236.             }

  1237.         }

  1238. //STOP_TIMER("decode-line")}

  1239.     }

  1240. }

  1241. 

  1242. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1243.     int x, y, p;

  1244.     int_fast16_t *sample[3][2];

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

  1246.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1247.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1248.     }

  1249. 

  1250.     s->run_index=0;

  1251. 

  1252.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1253. 

  1254.     for(y=0; y<h; y++){

  1255.         for(p=0; p<3; p++){

  1256.             int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer

  1257. 

  1258.             sample[p][0]= sample[p][1];

  1259.             sample[p][1]= temp;

  1260. 

  1261.             sample[p][1][-1]= sample[p][0][0  ];

  1262.             sample[p][0][ w]= sample[p][0][w-1];

  1263.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1264.         }

  1265.         for(x=0; x<w; x++){

  1266.             int g= sample[0][1][x];

  1267.             int b= sample[1][1][x];

  1268.             int r= sample[2][1][x];

  1269. 

  1270. //            assert(g>=0 && b>=0 && r>=0);

  1271. //            assert(g<256 && b<512 && r<512);

  1272. 

  1273.             b -= 0x100;

  1274.             r -= 0x100;

  1275.             g -= (b + r)>>2;

  1276.             b += g;

  1277.             r += g;

  1278. 

  1279.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1280.         }

  1281.     }

  1282. }

  1283. 

  1284. static int decode_slice(AVCodecContext *c, void *arg){

  1285.     FFV1Context *fs= *(void**)arg;

  1286.     FFV1Context *f= fs->avctx->priv_data;

  1287.     int width = fs->slice_width;

  1288.     int height= fs->slice_height;

  1289.     int x= fs->slice_x;

  1290.     int y= fs->slice_y;

  1291.     AVFrame * const p= &f->picture;

  1292. 

  1293.     av_assert1(width && height);

  1294.     if(f->colorspace==0){

  1295.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1296.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1297.         const int cx= x>>f->chroma_h_shift;

  1298.         const int cy= y>>f->chroma_v_shift;

  1299.         decode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1300. 

  1301.         decode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1302.         decode_plane(fs, p->data[2] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1303.     }else{

  1304.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1305.     }

  1306. 

  1307.     emms_c();

  1308. 

  1309.     return 0;

  1310. }

  1311. 

  1312. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1313.     int v;

  1314.     int i=0;

  1315.     uint8_t state[CONTEXT_SIZE];

  1316. 

  1317.     memset(state, 128, sizeof(state));

  1318. 

  1319.     for(v=0; i<128 ; v++){

  1320.         int len= get_symbol(c, state, 0) + 1;

  1321. 

  1322.         if(len + i > 128) return -1;

  1323. 

  1324.         while(len--){

  1325.             quant_table[i] = scale*v;

  1326.             i++;

  1327. //printf("%2d ",v);

  1328. //if(i%16==0) printf("\n");

  1329.         }

  1330.     }

  1331. 

  1332.     for(i=1; i<128; i++){

  1333.         quant_table[256-i]= -quant_table[i];

  1334.     }

  1335.     quant_table[128]= -quant_table[127];

  1336. 

  1337.     return 2*v - 1;

  1338. }

  1339. 

  1340. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1341.     int i;

  1342.     int context_count=1;

  1343. 

  1344.     for(i=0; i<5; i++){

  1345.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1346.         if(context_count > 32768U){

  1347.             return -1;

  1348.         }

  1349.     }

  1350.     return (context_count+1)/2;

  1351. }

  1352. 

  1353. static int read_extra_header(FFV1Context *f){

  1354.     RangeCoder * const c= &f->c;

  1355.     uint8_t state[CONTEXT_SIZE];

  1356.     int i;

  1357. 

  1358.     memset(state, 128, sizeof(state));

  1359. 

  1360.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1361.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1362. 

  1363.     f->version= get_symbol(c, state, 0);

  1364.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1365.     if(f->ac>1){

  1366.         for(i=1; i<256; i++){

  1367.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1368.         }

  1369.     }

  1370.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1371.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1372.     get_rac(c, state); //no chroma = false

  1373.     f->chroma_h_shift= get_symbol(c, state, 0);

  1374.     f->chroma_v_shift= get_symbol(c, state, 0);

  1375.     get_rac(c, state); //transparency plane

  1376.     f->plane_count= 2;

  1377.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1378.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1379.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1380.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1381.         return -1;

  1382.     }

  1383. 

  1384.     f->quant_table_count= get_symbol(c, state, 0);

  1385.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1386.         return -1;

  1387.     for(i=0; i<f->quant_table_count; i++){

  1388.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1389.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1390.             return -1;

  1391.         }

  1392.     }

  1393. 

  1394.     return 0;

  1395. }

  1396. 

  1397. static int read_header(FFV1Context *f){

  1398.     uint8_t state[CONTEXT_SIZE];

  1399.     int i, j, context_count;

  1400.     RangeCoder * const c= &f->slice_context[0]->c;

  1401. 

  1402.     memset(state, 128, sizeof(state));

  1403. 

  1404.     if(f->version < 2){

  1405.         f->version= get_symbol(c, state, 0);

  1406.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1407.         if(f->ac>1){

  1408.             for(i=1; i<256; i++){

  1409.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1410.             }

  1411.         }

  1412.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1413.         if(f->version>0)

  1414.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1415.         get_rac(c, state); //no chroma = false

  1416.         f->chroma_h_shift= get_symbol(c, state, 0);

  1417.         f->chroma_v_shift= get_symbol(c, state, 0);

  1418.         get_rac(c, state); //transparency plane

  1419.         f->plane_count= 2;

  1420.     }

  1421. 

  1422.     if(f->colorspace==0){

  1423.         if(f->avctx->bits_per_raw_sample<=8){

  1424.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1425.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1426.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1427.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1428.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1429.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1430.             default:

  1431.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1432.                 return -1;

  1433.             }

  1434.         }else{

  1435.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1436.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1437.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1438.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1439.             default:

  1440.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1441.                 return -1;

  1442.             }

  1443.         }

  1444.     }else if(f->colorspace==1){

  1445.         if(f->chroma_h_shift || f->chroma_v_shift){

  1446.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1447.             return -1;

  1448.         }

  1449.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1450.     }else{

  1451.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1452.         return -1;

  1453.     }

  1454. 

  1455. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1456.     if(f->version < 2){

  1457.         context_count= read_quant_tables(c, f->quant_table);

  1458.         if(context_count < 0){

  1459.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1460.                 return -1;

  1461.         }

  1462.     }else{

  1463.         f->slice_count= get_symbol(c, state, 0);

  1464.         if(f->slice_count > (unsigned)MAX_SLICES)

  1465.             return -1;

  1466.     }

  1467. 

  1468.     for(j=0; j<f->slice_count; j++){

  1469.         FFV1Context *fs= f->slice_context[j];

  1470.         fs->ac= f->ac;

  1471. 

  1472.         if(f->version >= 2){

  1473.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1474.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1475.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1476.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1477. 

  1478.             fs->slice_x /= f->num_h_slices;

  1479.             fs->slice_y /= f->num_v_slices;

  1480.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1481.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1482.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1483.                 return -1;

  1484.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1485.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1486.                 return -1;

  1487.         }

  1488. 

  1489.         for(i=0; i<f->plane_count; i++){

  1490.             PlaneContext * const p= &fs->plane[i];

  1491. 

  1492.             if(f->version >= 2){

  1493.                 int idx=get_symbol(c, state, 0);

  1494.                 if(idx > (unsigned)f->quant_table_count){

  1495.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1496.                     return -1;

  1497.                 }

  1498.                 p->quant_table_index= idx;

  1499.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1500.                 context_count= f->context_count[idx];

  1501.             }else{

  1502.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1503.             }

  1504. 

  1505.             if(p->context_count < context_count){

  1506.                 av_freep(&p->state);

  1507.                 av_freep(&p->vlc_state);

  1508.             }

  1509.             p->context_count= context_count;

  1510.         }

  1511.     }

  1512. 

  1513.     return 0;

  1514. }

  1515. 

  1516. static av_cold int decode_init(AVCodecContext *avctx)

  1517. {

  1518.     FFV1Context *f = avctx->priv_data;

  1519. 

  1520.     common_init(avctx);

  1521. 

  1522.     if(avctx->extradata && read_extra_header(f) < 0)

  1523.         return -1;

  1524. 

  1525.     if(init_slice_contexts(f) < 0)

  1526.         return -1;

  1527. 

  1528.     return 0;

  1529. }

  1530. 

  1531. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1532.     const uint8_t *buf = avpkt->data;

  1533.     int buf_size = avpkt->size;

  1534.     FFV1Context *f = avctx->priv_data;

  1535.     RangeCoder * const c= &f->slice_context[0]->c;

  1536.     AVFrame * const p= &f->picture;

  1537.     int bytes_read, i;

  1538.     uint8_t keystate= 128;

  1539.     const uint8_t *buf_p;

  1540. 

  1541.     AVFrame *picture = data;

  1542. 

  1543.     ff_init_range_decoder(c, buf, buf_size);

  1544.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1545. 

  1546. 

  1547.     p->pict_type= FF_I_TYPE; //FIXME I vs. P

  1548.     if(get_rac(c, &keystate)){

  1549.         p->key_frame= 1;

  1550.         if(read_header(f) < 0)

  1551.             return -1;

  1552.         if(init_slice_state(f) < 0)

  1553.             return -1;

  1554. 

  1555.         clear_state(f);

  1556.     }else{

  1557.         p->key_frame= 0;

  1558.     }

  1559.     if(f->ac>1){

  1560.         int i;

  1561.         for(i=1; i<256; i++){

  1562.             c->one_state[i]= f->state_transition[i];

  1563.             c->zero_state[256-i]= 256-c->one_state[i];

  1564.         }

  1565.     }

  1566. 

  1567.     p->reference= 0;

  1568.     if(avctx->get_buffer(avctx, p) < 0){

  1569.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1570.         return -1;

  1571.     }

  1572. 

  1573.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1574.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1575. 

  1576.     if(!f->ac){

  1577.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1578.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1579. //printf("pos=%d\n", bytes_read);

  1580.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, buf_size - bytes_read);

  1581.     } else {

  1582.         bytes_read = 0; /* avoid warning */

  1583.     }

  1584. 

  1585.     buf_p= buf + buf_size;

  1586.     for(i=f->slice_count-1; i>0; i--){

  1587.         FFV1Context *fs= f->slice_context[i];

  1588.         int v= AV_RB24(buf_p-3)+3;

  1589.         if(buf_p - buf <= v){

  1590.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1591.             return -1;

  1592.         }

  1593.         buf_p -= v;

  1594.         if(fs->ac){

  1595.             ff_init_range_decoder(&fs->c, buf_p, v);

  1596.         }else{

  1597.             init_get_bits(&fs->gb, buf_p, v);

  1598.         }

  1599.     }

  1600. 

  1601.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1602.     f->picture_number++;

  1603. 

  1604.     *picture= *p;

  1605. 

  1606.     avctx->release_buffer(avctx, p); //FIXME

  1607. 

  1608.     *data_size = sizeof(AVFrame);

  1609. 

  1610.     return buf_size;

  1611. }

  1612. 

  1613. AVCodec ffv1_decoder = {

  1614.     "ffv1",

  1615.     AVMEDIA_TYPE_VIDEO,

  1616.     CODEC_ID_FFV1,

  1617.     sizeof(FFV1Context),

  1618.     decode_init,

  1619.     NULL,

  1620.     common_end,

  1621.     decode_frame,

  1622.     CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,

  1623.     NULL,

  1624.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1625. };

  1626. 

  1627. #if CONFIG_FFV1_ENCODER

  1628. AVCodec ffv1_encoder = {

  1629.     "ffv1",

  1630.     AVMEDIA_TYPE_VIDEO,

  1631.     CODEC_ID_FFV1,

  1632.     sizeof(FFV1Context),

  1633.     encode_init,

  1634.     encode_frame,

  1635.     common_end,

  1636.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_NONE},

  1637.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1638. };

  1639. #endif