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.
29110 Commits
32 Branches
437MB
Tree: f21fb76b1b
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'f21fb76b1b'
${ noResults }
FFmpeg/libavcodec/ffv1.c

1826 lines
58KB
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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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[41];

  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.     uint8_t (*initial_states[MAX_QUANT_TABLES])[32];

  251.     int run_index;

  252.     int colorspace;

  253.     int16_t *sample_buffer;

  254.     int gob_count;

  255. 

  256.     int quant_table_count;

  257. 

  258.     DSPContext dsp;

  259. 

  260.     struct FFV1Context *slice_context[MAX_SLICES];

  261.     int slice_count;

  262.     int num_v_slices;

  263.     int num_h_slices;

  264.     int slice_width;

  265.     int slice_height;

  266.     int slice_x;

  267.     int slice_y;

  268. }FFV1Context;

  269. 

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

  271.     if(bits==8)

  272.         diff= (int8_t)diff;

  273.     else{

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

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

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

  277.     }

  278. 

  279.     return diff;

  280. }

  281. 

  282. static inline int predict(int16_t *src, int16_t *last)

  283. {

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

  285.     const int  T= last[ 0];

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

  287. 

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

  289. }

  290. 

  291. static inline int get_context(PlaneContext *p, int16_t *src,

  292.                               int16_t *last, int16_t *last2)

  293. {

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

  295.     const int  T= last[ 0];

  296.     const int RT= last[ 1];

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

  298. 

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

  300.         const int TT= last2[0];

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

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

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

  304.     }else

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

  306. }

  307. 

  308. static void find_best_state(uint8_t best_state[256][256], const uint8_t one_state[256]){

  309.     int i,j,k,m;

  310.     double l2tab[256];

  311. 

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

  313.         l2tab[i]= log2(i/256.0);

  314. 

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

  316.         double best_len[256];

  317.         double p= i/256.0;

  318. 

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

  320.             best_len[j]= 1<<30;

  321. 

  322.         for(j=FFMAX(i-10,1); j<FFMIN(i+11,256); j++){

  323.             double occ[256]={0};

  324.             double len=0;

  325.             occ[j]=1.0;

  326.             for(k=0; k<256; k++){

  327.                 double newocc[256]={0};

  328.                 for(m=0; m<256; m++){

  329.                     if(occ[m]){

  330.                         len -=occ[m]*(     p *l2tab[    m]

  331.                                       + (1-p)*l2tab[256-m]);

  332.                     }

  333.                 }

  334.                 if(len < best_len[k]){

  335.                     best_len[k]= len;

  336.                     best_state[i][k]= j;

  337.                 }

  338.                 for(m=0; m<256; m++){

  339.                     if(occ[m]){

  340.                         newocc[    one_state[    m]] += occ[m]*   p ;

  341.                         newocc[256-one_state[256-m]] += occ[m]*(1-p);

  342.                     }

  343.                 }

  344.                 memcpy(occ, newocc, sizeof(occ));

  345.             }

  346.         }

  347.     }

  348. }

  349. 

  350. 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]){

  351.     int i;

  352. 

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

  354. do{\

  355.     if(rc_stat){\

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

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

  358.     }\

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

  360. }while(0)

  361. 

  362.     if(v){

  363.         const int a= FFABS(v);

  364.         const int e= av_log2(a);

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

  366.         if(e<=9){

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

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

  369.             }

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

  371. 

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

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

  374.             }

  375. 

  376.             if(is_signed)

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

  378.         }else{

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

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

  381.             }

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

  383. 

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

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

  386.             }

  387. 

  388.             if(is_signed)

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

  390.         }

  391.     }else{

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

  393.     }

  394. #undef put_rac

  395. }

  396. 

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

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

  399. }

  400. 

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

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

  403.         return 0;

  404.     else{

  405.         int i, e, a;

  406.         e= 0;

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

  408.             e++;

  409.         }

  410. 

  411.         a= 1;

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

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

  414.         }

  415. 

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

  417.         return (a^e)-e;

  418.     }

  419. }

  420. 

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

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

  423. }

  424. 

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

  426.     int drift= state->drift;

  427.     int count= state->count;

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

  429.     drift += v;

  430. 

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

  432.         count >>= 1;

  433.         drift >>= 1;

  434.         state->error_sum >>= 1;

  435.     }

  436.     count++;

  437. 

  438.     if(drift <= -count){

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

  440. 

  441.         drift += count;

  442.         if(drift <= -count)

  443.             drift= -count + 1;

  444.     }else if(drift > 0){

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

  446. 

  447.         drift -= count;

  448.         if(drift > 0)

  449.             drift= 0;

  450.     }

  451. 

  452.     state->drift= drift;

  453.     state->count= count;

  454. }

  455. 

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

  457.     int i, k, code;

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

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

  460. 

  461.     i= state->count;

  462.     k=0;

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

  464.         k++;

  465.         i += i;

  466.     }

  467. 

  468.     assert(k<=8);

  469. 

  470. #if 0 // JPEG LS

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

  472.     else                                         code= v;

  473. #else

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

  475. #endif

  476. 

  477. //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);

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

  479. 

  480.     update_vlc_state(state, v);

  481. }

  482. 

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

  484.     int k, i, v, ret;

  485. 

  486.     i= state->count;

  487.     k=0;

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

  489.         k++;

  490.         i += i;

  491.     }

  492. 

  493.     assert(k<=8);

  494. 

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

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

  497. 

  498. #if 0 // JPEG LS

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

  500. #else

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

  502. #endif

  503. 

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

  505. 

  506.     update_vlc_state(state, v);

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

  508.     return ret;

  509. }

  510. 

  511. #if CONFIG_FFV1_ENCODER

  512. static av_always_inline int encode_line(FFV1Context *s, int w,

  513.                                         int16_t *sample[2],

  514.                                         int plane_index, int bits)

  515. {

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

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

  518.     int x;

  519.     int run_index= s->run_index;

  520.     int run_count=0;

  521.     int run_mode=0;

  522. 

  523.     if(s->ac){

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

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

  526.             return -1;

  527.         }

  528.     }else{

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

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

  531.             return -1;

  532.         }

  533.     }

  534. 

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

  536.         int diff, context;

  537. 

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

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

  540. 

  541.         if(context < 0){

  542.             context = -context;

  543.             diff= -diff;

  544.         }

  545. 

  546.         diff= fold(diff, bits);

  547. 

  548.         if(s->ac){

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

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

  551.             }else{

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

  553.             }

  554.         }else{

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

  556. 

  557.             if(run_mode){

  558. 

  559.                 if(diff){

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

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

  562.                         run_index++;

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

  564.                     }

  565. 

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

  567.                     if(run_index) run_index--;

  568.                     run_count=0;

  569.                     run_mode=0;

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

  571.                 }else{

  572.                     run_count++;

  573.                 }

  574.             }

  575. 

  576. //            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));

  577. 

  578.             if(run_mode == 0)

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

  580.         }

  581.     }

  582.     if(run_mode){

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

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

  585.             run_index++;

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

  587.         }

  588. 

  589.         if(run_count)

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

  591.     }

  592.     s->run_index= run_index;

  593. 

  594.     return 0;

  595. }

  596. 

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

  598.     int x,y,i;

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

  600.     int16_t *sample[3];

  601.     s->run_index=0;

  602. 

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

  604. 

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

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

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

  608. 

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

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

  611. //{START_TIMER

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

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

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

  615.             }

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

  617.         }else{

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

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

  620.             }

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

  622.         }

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

  624.     }

  625. }

  626. 

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

  628.     int x, y, p, i;

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

  630.     int16_t *sample[3][3];

  631.     s->run_index=0;

  632. 

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

  634. 

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

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

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

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

  639. 

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

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

  642.             int b= v&0xFF;

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

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

  645. 

  646.             b -= g;

  647.             r -= g;

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

  649.             b += 0x100;

  650.             r += 0x100;

  651. 

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

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

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

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

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

  657.         }

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

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

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

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

  662.         }

  663.     }

  664. }

  665. 

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

  667.     int last=0;

  668.     int i;

  669.     uint8_t state[CONTEXT_SIZE];

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

  671. 

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

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

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

  675.             last= i;

  676.         }

  677.     }

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

  679. }

  680. 

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

  682.     int i;

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

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

  685. }

  686. 

  687. static void write_header(FFV1Context *f){

  688.     uint8_t state[CONTEXT_SIZE];

  689.     int i, j;

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

  691. 

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

  693. 

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

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

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

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

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

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

  700.             }

  701.         }

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

  703.         if(f->version>0)

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

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

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

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

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

  709. 

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

  711.     }else{

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

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

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

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

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

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

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

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

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

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

  722.             }

  723.         }

  724.     }

  725. }

  726. #endif /* CONFIG_FFV1_ENCODER */

  727. 

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

  729.     FFV1Context *s = avctx->priv_data;

  730. 

  731.     s->avctx= avctx;

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

  733. 

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

  735. 

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

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

  738. 

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

  740.     //defaults

  741.     s->num_h_slices=1;

  742.     s->num_v_slices=1;

  743. 

  744. 

  745.     return 0;

  746. }

  747. 

  748. static int init_slice_state(FFV1Context *f){

  749.     int i, j;

  750. 

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

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

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

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

  755. 

  756.             if(fs->ac){

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

  758.                 if(!p->    state)

  759.                     return AVERROR(ENOMEM);

  760.             }else{

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

  762.                 if(!p->vlc_state)

  763.                     return AVERROR(ENOMEM);

  764.             }

  765.         }

  766. 

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

  768.             //FIXME only redo if state_transition changed

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

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

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

  772.             }

  773.         }

  774.     }

  775. 

  776.     return 0;

  777. }

  778. 

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

  780.     int i;

  781. 

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

  783. 

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

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

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

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

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

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

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

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

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

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

  794.         memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));

  795. 

  796.         fs->slice_width = sxe - sxs;

  797.         fs->slice_height= sye - sys;

  798.         fs->slice_x     = sxs;

  799.         fs->slice_y     = sys;

  800. 

  801.         fs->sample_buffer = av_malloc(9 * (fs->width+6) * sizeof(*fs->sample_buffer));

  802.         if (!fs->sample_buffer)

  803.             return AVERROR(ENOMEM);

  804.     }

  805.     return 0;

  806. }

  807. 

  808. static int allocate_initial_states(FFV1Context *f){

  809.     int i;

  810. 

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

  812.         f->initial_states[i]= av_malloc(f->context_count[i]*sizeof(*f->initial_states[i]));

  813.         if(!f->initial_states[i])

  814.             return AVERROR(ENOMEM);

  815.         memset(f->initial_states[i], 128, f->context_count[i]*sizeof(*f->initial_states[i]));

  816.     }

  817.     return 0;

  818. }

  819. 

  820. #if CONFIG_FFV1_ENCODER

  821. static int write_extra_header(FFV1Context *f){

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

  823.     uint8_t state[CONTEXT_SIZE];

  824.     int i, j, k;

  825.     uint8_t state2[32][CONTEXT_SIZE];

  826. 

  827.     memset(state2, 128, sizeof(state2));

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

  829. 

  830.     f->avctx->extradata= av_malloc(f->avctx->extradata_size= 10000 + (11*11*5*5*5+11*11*11)*32);

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

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

  833. 

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

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

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

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

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

  839.         }

  840.     }

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

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

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

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

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

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

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

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

  849. 

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

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

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

  853. 

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

  855.         for(j=0; j<f->context_count[i]*CONTEXT_SIZE; j++)

  856.             if(f->initial_states[i] && f->initial_states[i][0][j] != 128)

  857.                 break;

  858.         if(j<f->context_count[i]*CONTEXT_SIZE){

  859.             put_rac(c, state, 1);

  860.             for(j=0; j<f->context_count[i]; j++){

  861.                 for(k=0; k<CONTEXT_SIZE; k++){

  862.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  863.                     put_symbol(c, state2[k], (int8_t)(f->initial_states[i][j][k]-pred), 1);

  864.                 }

  865.             }

  866.         }else{

  867.             put_rac(c, state, 0);

  868.         }

  869.     }

  870. 

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

  872. 

  873.     return 0;

  874. }

  875. 

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

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

  878. 

  879.     do{

  880.         changed=0;

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

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

  883. #define COST(old, new) \

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

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

  886. 

  887. #define COST2(old, new) \

  888.     COST(old, new)\

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

  890. 

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

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

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

  894.                     int j;

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

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

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

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

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

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

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

  902.                     }

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

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

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

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

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

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

  909.                         }

  910.                     }

  911.                     print=changed=1;

  912.                 }

  913.             }

  914.         }

  915.     }while(changed);

  916.     return print;

  917. }

  918. 

  919. static av_cold int encode_init(AVCodecContext *avctx)

  920. {

  921.     FFV1Context *s = avctx->priv_data;

  922.     int i, j, k, m;

  923. 

  924.     common_init(avctx);

  925. 

  926.     s->version=0;

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

  928. 

  929.     if(s->ac>1)

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

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

  932. 

  933.     s->plane_count=2;

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

  935.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  945.         }else{

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

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

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

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

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

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

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

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

  954.         }

  955.     }

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

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

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

  959. 

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

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

  962. 

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

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

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

  966.     }

  967. 

  968.     if(allocate_initial_states(s) < 0)

  969.         return AVERROR(ENOMEM);

  970. 

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

  972.     switch(avctx->pix_fmt){

  973.     case PIX_FMT_YUV444P16:

  974.     case PIX_FMT_YUV422P16:

  975.     case PIX_FMT_YUV420P16:

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

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

  978.             return -1;

  979.         }

  980.         if(!s->ac){

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

  982.             return -1;

  983.         }

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

  985.     case PIX_FMT_YUV444P:

  986.     case PIX_FMT_YUV422P:

  987.     case PIX_FMT_YUV420P:

  988.     case PIX_FMT_YUV411P:

  989.     case PIX_FMT_YUV410P:

  990.         s->colorspace= 0;

  991.         break;

  992.     case PIX_FMT_RGB32:

  993.         s->colorspace= 1;

  994.         break;

  995.     default:

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

  997.         return -1;

  998.     }

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

  1000. 

  1001.     s->picture_number=0;

  1002. 

  1003.     if(avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  1004.         for(i=0; i<s->quant_table_count; i++){

  1005.             s->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*s->rc_stat2[i]));

  1006.             if(!s->rc_stat2[i])

  1007.                 return AVERROR(ENOMEM);

  1008.         }

  1009.     }

  1010.     if(avctx->stats_in){

  1011.         char *p= avctx->stats_in;

  1012.         uint8_t best_state[256][256];

  1013.         int gob_count=0;

  1014.         char *next;

  1015. 

  1016.         av_assert0(s->version>=2);

  1017. 

  1018.         for(;;){

  1019.             for(j=0; j<256; j++){

  1020.                 for(i=0; i<2; i++){

  1021.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1022.                     if(next==p){

  1023.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1024.                         return -1;

  1025.                     }

  1026.                     p=next;

  1027.                 }

  1028.             }

  1029.             for(i=0; i<s->quant_table_count; i++){

  1030.                 for(j=0; j<s->context_count[i]; j++){

  1031.                     for(k=0; k<32; k++){

  1032.                         for(m=0; m<2; m++){

  1033.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1034.                             if(next==p){

  1035.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1036.                                 return -1;

  1037.                             }

  1038.                             p=next;

  1039.                         }

  1040.                     }

  1041.                 }

  1042.             }

  1043.             gob_count= strtol(p, &next, 0);

  1044.             if(next==p || gob_count <0){

  1045.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1046.                 return -1;

  1047.             }

  1048.             p=next;

  1049.             while(*p=='\n' || *p==' ') p++;

  1050.             if(p[0]==0) break;

  1051.         }

  1052.         sort_stt(s, s->state_transition);

  1053. 

  1054.         find_best_state(best_state, s->state_transition);

  1055. 

  1056.         for(i=0; i<s->quant_table_count; i++){

  1057.             for(j=0; j<s->context_count[i]; j++){

  1058.                 for(k=0; k<32; k++){

  1059.                     double p= 128;

  1060.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1061.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1062.                     }

  1063.                     s->initial_states[i][j][k]= best_state[av_clip(round(p), 1, 255)][av_clip((s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1])/gob_count, 0, 255)];

  1064.                 }

  1065.             }

  1066.         }

  1067.     }

  1068. 

  1069.     if(s->version>1){

  1070.         s->num_h_slices=2;

  1071.         s->num_v_slices=2;

  1072.         write_extra_header(s);

  1073.     }

  1074. 

  1075.     if(init_slice_contexts(s) < 0)

  1076.         return -1;

  1077.     if(init_slice_state(s) < 0)

  1078.         return -1;

  1079. 

  1080. #define STATS_OUT_SIZE 1024*1024*6

  1081.     if(avctx->flags & CODEC_FLAG_PASS1){

  1082.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1083.         for(i=0; i<s->quant_table_count; i++){

  1084.             for(j=0; j<s->slice_count; j++){

  1085.                 FFV1Context *sf= s->slice_context[j];

  1086.                 av_assert0(!sf->rc_stat2[i]);

  1087.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1088.                 if(!sf->rc_stat2[i])

  1089.                     return AVERROR(ENOMEM);

  1090.             }

  1091.         }

  1092.     }

  1093. 

  1094.     return 0;

  1095. }

  1096. #endif /* CONFIG_FFV1_ENCODER */

  1097. 

  1098. 

  1099. static void clear_state(FFV1Context *f){

  1100.     int i, si, j;

  1101. 

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

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

  1104.         for(i=0; i<f->plane_count; i++){

  1105.             PlaneContext *p= &fs->plane[i];

  1106. 

  1107.             p->interlace_bit_state[0]= 128;

  1108.             p->interlace_bit_state[1]= 128;

  1109. 

  1110.             if(fs->ac){

  1111.                 if(f->initial_states[p->quant_table_index]){

  1112.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1113.                 }else

  1114.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1115.             }else{

  1116.             for(j=0; j<p->context_count; j++){

  1117.                     p->vlc_state[j].drift= 0;

  1118.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1119.                     p->vlc_state[j].bias= 0;

  1120.                     p->vlc_state[j].count= 1;

  1121.             }

  1122.             }

  1123.         }

  1124.     }

  1125. }

  1126. 

  1127. #if CONFIG_FFV1_ENCODER

  1128. static int encode_slice(AVCodecContext *c, void *arg){

  1129.     FFV1Context *fs= *(void**)arg;

  1130.     FFV1Context *f= fs->avctx->priv_data;

  1131.     int width = fs->slice_width;

  1132.     int height= fs->slice_height;

  1133.     int x= fs->slice_x;

  1134.     int y= fs->slice_y;

  1135.     AVFrame * const p= &f->picture;

  1136. 

  1137.     if(f->colorspace==0){

  1138.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1139.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1140.         const int cx= x>>f->chroma_h_shift;

  1141.         const int cy= y>>f->chroma_v_shift;

  1142. 

  1143.         encode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1144. 

  1145.         encode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1146.         encode_plane(fs, p->data[2] + cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1147.     }else{

  1148.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1149.     }

  1150.     emms_c();

  1151. 

  1152.     return 0;

  1153. }

  1154. 

  1155. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1156.     FFV1Context *f = avctx->priv_data;

  1157.     RangeCoder * const c= &f->slice_context[0]->c;

  1158.     AVFrame *pict = data;

  1159.     AVFrame * const p= &f->picture;

  1160.     int used_count= 0;

  1161.     uint8_t keystate=128;

  1162.     uint8_t *buf_p;

  1163.     int i;

  1164. 

  1165.     ff_init_range_encoder(c, buf, buf_size);

  1166.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1167. 

  1168.     *p = *pict;

  1169.     p->pict_type= AV_PICTURE_TYPE_I;

  1170. 

  1171.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1172.         put_rac(c, &keystate, 1);

  1173.         p->key_frame= 1;

  1174.         f->gob_count++;

  1175.         write_header(f);

  1176.         clear_state(f);

  1177.     }else{

  1178.         put_rac(c, &keystate, 0);

  1179.         p->key_frame= 0;

  1180.     }

  1181. 

  1182.     if(!f->ac){

  1183.         used_count += ff_rac_terminate(c);

  1184. //printf("pos=%d\n", used_count);

  1185.         init_put_bits(&f->slice_context[0]->pb, buf + used_count, buf_size - used_count);

  1186.     }else if (f->ac>1){

  1187.         int i;

  1188.         for(i=1; i<256; i++){

  1189.             c->one_state[i]= f->state_transition[i];

  1190.             c->zero_state[256-i]= 256-c->one_state[i];

  1191.         }

  1192.     }

  1193. 

  1194.     for(i=1; i<f->slice_count; i++){

  1195.         FFV1Context *fs= f->slice_context[i];

  1196.         uint8_t *start= buf + (buf_size-used_count)*i/f->slice_count;

  1197.         int len= buf_size/f->slice_count;

  1198. 

  1199.         if(fs->ac){

  1200.             ff_init_range_encoder(&fs->c, start, len);

  1201.         }else{

  1202.             init_put_bits(&fs->pb, start, len);

  1203.         }

  1204.     }

  1205.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1206. 

  1207.     buf_p=buf;

  1208.     for(i=0; i<f->slice_count; i++){

  1209.         FFV1Context *fs= f->slice_context[i];

  1210.         int bytes;

  1211. 

  1212.         if(fs->ac){

  1213.             uint8_t state=128;

  1214.             put_rac(&fs->c, &state, 0);

  1215.             bytes= ff_rac_terminate(&fs->c);

  1216.         }else{

  1217.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1218.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1219.             used_count= 0;

  1220.         }

  1221.         if(i>0){

  1222.             av_assert0(bytes < buf_size/f->slice_count);

  1223.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1224.             av_assert0(bytes < (1<<24));

  1225.             AV_WB24(buf_p+bytes, bytes);

  1226.             bytes+=3;

  1227.         }

  1228.         buf_p += bytes;

  1229.     }

  1230. 

  1231.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1232.         int j, k, m;

  1233.         char *p= avctx->stats_out;

  1234.         char *end= p + STATS_OUT_SIZE;

  1235. 

  1236.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1237.         for(i=0; i<f->quant_table_count; i++)

  1238.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1239. 

  1240.         for(j=0; j<f->slice_count; j++){

  1241.             FFV1Context *fs= f->slice_context[j];

  1242.             for(i=0; i<256; i++){

  1243.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1244.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1245.             }

  1246.             for(i=0; i<f->quant_table_count; i++){

  1247.                 for(k=0; k<f->context_count[i]; k++){

  1248.                     for(m=0; m<32; m++){

  1249.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1250.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1251.                     }

  1252.                 }

  1253.             }

  1254.         }

  1255. 

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

  1257.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1258.             p+= strlen(p);

  1259.         }

  1260.         snprintf(p, end-p, "\n");

  1261. 

  1262.         for(i=0; i<f->quant_table_count; i++){

  1263.             for(j=0; j<f->context_count[i]; j++){

  1264.                 for(m=0; m<32; m++){

  1265.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1266.                     p+= strlen(p);

  1267.                 }

  1268.             }

  1269.         }

  1270.         snprintf(p, end-p, "%d\n", f->gob_count);

  1271.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1272.         avctx->stats_out[0] = '\0';

  1273. 

  1274.     f->picture_number++;

  1275.     return buf_p-buf;

  1276. }

  1277. #endif /* CONFIG_FFV1_ENCODER */

  1278. 

  1279. static av_cold int common_end(AVCodecContext *avctx){

  1280.     FFV1Context *s = avctx->priv_data;

  1281.     int i, j;

  1282. 

  1283.     if (avctx->codec->decode && s->picture.data[0])

  1284.         avctx->release_buffer(avctx, &s->picture);

  1285. 

  1286.     for(j=0; j<s->slice_count; j++){

  1287.         FFV1Context *fs= s->slice_context[j];

  1288.         for(i=0; i<s->plane_count; i++){

  1289.             PlaneContext *p= &fs->plane[i];

  1290. 

  1291.             av_freep(&p->state);

  1292.             av_freep(&p->vlc_state);

  1293.         }

  1294.         av_freep(&fs->sample_buffer);

  1295.     }

  1296. 

  1297.     av_freep(&avctx->stats_out);

  1298.     for(j=0; j<s->quant_table_count; j++){

  1299.         av_freep(&s->initial_states[j]);

  1300.         for(i=0; i<s->slice_count; i++){

  1301.             FFV1Context *sf= s->slice_context[i];

  1302.             av_freep(&sf->rc_stat2[j]);

  1303.         }

  1304.         av_freep(&s->rc_stat2[j]);

  1305.     }

  1306. 

  1307.     for(i=0; i<s->slice_count; i++){

  1308.         av_freep(&s->slice_context[i]);

  1309.     }

  1310. 

  1311.     return 0;

  1312. }

  1313. 

  1314. static av_always_inline void decode_line(FFV1Context *s, int w,

  1315.                                          int16_t *sample[2],

  1316.                                          int plane_index, int bits)

  1317. {

  1318.     PlaneContext * const p= &s->plane[plane_index];

  1319.     RangeCoder * const c= &s->c;

  1320.     int x;

  1321.     int run_count=0;

  1322.     int run_mode=0;

  1323.     int run_index= s->run_index;

  1324. 

  1325.     for(x=0; x<w; x++){

  1326.         int diff, context, sign;

  1327. 

  1328.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1329.         if(context < 0){

  1330.             context= -context;

  1331.             sign=1;

  1332.         }else

  1333.             sign=0;

  1334. 

  1335.         av_assert2(context < p->context_count);

  1336. 

  1337.         if(s->ac){

  1338.             diff= get_symbol_inline(c, p->state[context], 1);

  1339.         }else{

  1340.             if(context == 0 && run_mode==0) run_mode=1;

  1341. 

  1342.             if(run_mode){

  1343.                 if(run_count==0 && run_mode==1){

  1344.                     if(get_bits1(&s->gb)){

  1345.                         run_count = 1<<ff_log2_run[run_index];

  1346.                         if(x + run_count <= w) run_index++;

  1347.                     }else{

  1348.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1349.                         else run_count=0;

  1350.                         if(run_index) run_index--;

  1351.                         run_mode=2;

  1352.                     }

  1353.                 }

  1354.                 run_count--;

  1355.                 if(run_count < 0){

  1356.                     run_mode=0;

  1357.                     run_count=0;

  1358.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1359.                     if(diff>=0) diff++;

  1360.                 }else

  1361.                     diff=0;

  1362.             }else

  1363.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1364. 

  1365. //            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));

  1366.         }

  1367. 

  1368.         if(sign) diff= -diff;

  1369. 

  1370.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1371.     }

  1372.     s->run_index= run_index;

  1373. }

  1374. 

  1375. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1376.     int x, y;

  1377.     int16_t *sample[2];

  1378.     sample[0]=s->sample_buffer    +3;

  1379.     sample[1]=s->sample_buffer+w+6+3;

  1380. 

  1381.     s->run_index=0;

  1382. 

  1383.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1384. 

  1385.     for(y=0; y<h; y++){

  1386.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1387. 

  1388.         sample[0]= sample[1];

  1389.         sample[1]= temp;

  1390. 

  1391.         sample[1][-1]= sample[0][0  ];

  1392.         sample[0][ w]= sample[0][w-1];

  1393. 

  1394. //{START_TIMER

  1395.         if(s->avctx->bits_per_raw_sample <= 8){

  1396.             decode_line(s, w, sample, plane_index, 8);

  1397.             for(x=0; x<w; x++){

  1398.                 src[x + stride*y]= sample[1][x];

  1399.             }

  1400.         }else{

  1401.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1402.             for(x=0; x<w; x++){

  1403.                 ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1404.             }

  1405.         }

  1406. //STOP_TIMER("decode-line")}

  1407.     }

  1408. }

  1409. 

  1410. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1411.     int x, y, p;

  1412.     int16_t *sample[3][2];

  1413.     for(x=0; x<3; x++){

  1414.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1415.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1416.     }

  1417. 

  1418.     s->run_index=0;

  1419. 

  1420.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1421. 

  1422.     for(y=0; y<h; y++){

  1423.         for(p=0; p<3; p++){

  1424.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1425. 

  1426.             sample[p][0]= sample[p][1];

  1427.             sample[p][1]= temp;

  1428. 

  1429.             sample[p][1][-1]= sample[p][0][0  ];

  1430.             sample[p][0][ w]= sample[p][0][w-1];

  1431.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1432.         }

  1433.         for(x=0; x<w; x++){

  1434.             int g= sample[0][1][x];

  1435.             int b= sample[1][1][x];

  1436.             int r= sample[2][1][x];

  1437. 

  1438. //            assert(g>=0 && b>=0 && r>=0);

  1439. //            assert(g<256 && b<512 && r<512);

  1440. 

  1441.             b -= 0x100;

  1442.             r -= 0x100;

  1443.             g -= (b + r)>>2;

  1444.             b += g;

  1445.             r += g;

  1446. 

  1447.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1448.         }

  1449.     }

  1450. }

  1451. 

  1452. static int decode_slice(AVCodecContext *c, void *arg){

  1453.     FFV1Context *fs= *(void**)arg;

  1454.     FFV1Context *f= fs->avctx->priv_data;

  1455.     int width = fs->slice_width;

  1456.     int height= fs->slice_height;

  1457.     int x= fs->slice_x;

  1458.     int y= fs->slice_y;

  1459.     AVFrame * const p= &f->picture;

  1460. 

  1461.     av_assert1(width && height);

  1462.     if(f->colorspace==0){

  1463.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1464.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1465.         const int cx= x>>f->chroma_h_shift;

  1466.         const int cy= y>>f->chroma_v_shift;

  1467.         decode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1468. 

  1469.         decode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1470.         decode_plane(fs, p->data[2] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1471.     }else{

  1472.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1473.     }

  1474. 

  1475.     emms_c();

  1476. 

  1477.     return 0;

  1478. }

  1479. 

  1480. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1481.     int v;

  1482.     int i=0;

  1483.     uint8_t state[CONTEXT_SIZE];

  1484. 

  1485.     memset(state, 128, sizeof(state));

  1486. 

  1487.     for(v=0; i<128 ; v++){

  1488.         int len= get_symbol(c, state, 0) + 1;

  1489. 

  1490.         if(len + i > 128) return -1;

  1491. 

  1492.         while(len--){

  1493.             quant_table[i] = scale*v;

  1494.             i++;

  1495. //printf("%2d ",v);

  1496. //if(i%16==0) printf("\n");

  1497.         }

  1498.     }

  1499. 

  1500.     for(i=1; i<128; i++){

  1501.         quant_table[256-i]= -quant_table[i];

  1502.     }

  1503.     quant_table[128]= -quant_table[127];

  1504. 

  1505.     return 2*v - 1;

  1506. }

  1507. 

  1508. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1509.     int i;

  1510.     int context_count=1;

  1511. 

  1512.     for(i=0; i<5; i++){

  1513.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1514.         if(context_count > 32768U){

  1515.             return -1;

  1516.         }

  1517.     }

  1518.     return (context_count+1)/2;

  1519. }

  1520. 

  1521. static int read_extra_header(FFV1Context *f){

  1522.     RangeCoder * const c= &f->c;

  1523.     uint8_t state[CONTEXT_SIZE];

  1524.     int i, j, k;

  1525.     uint8_t state2[32][CONTEXT_SIZE];

  1526. 

  1527.     memset(state2, 128, sizeof(state2));

  1528.     memset(state, 128, sizeof(state));

  1529. 

  1530.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1531.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1532. 

  1533.     f->version= get_symbol(c, state, 0);

  1534.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1535.     if(f->ac>1){

  1536.         for(i=1; i<256; i++){

  1537.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1538.         }

  1539.     }

  1540.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1541.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1542.     get_rac(c, state); //no chroma = false

  1543.     f->chroma_h_shift= get_symbol(c, state, 0);

  1544.     f->chroma_v_shift= get_symbol(c, state, 0);

  1545.     get_rac(c, state); //transparency plane

  1546.     f->plane_count= 2;

  1547.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1548.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1549.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1550.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1551.         return -1;

  1552.     }

  1553. 

  1554.     f->quant_table_count= get_symbol(c, state, 0);

  1555.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1556.         return -1;

  1557.     for(i=0; i<f->quant_table_count; i++){

  1558.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1559.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1560.             return -1;

  1561.         }

  1562.     }

  1563. 

  1564.     if(allocate_initial_states(f) < 0)

  1565.         return AVERROR(ENOMEM);

  1566. 

  1567.     for(i=0; i<f->quant_table_count; i++){

  1568.         if(get_rac(c, state)){

  1569.             for(j=0; j<f->context_count[i]; j++){

  1570.                 for(k=0; k<CONTEXT_SIZE; k++){

  1571.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1572.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1573.                 }

  1574.             }

  1575.         }

  1576.     }

  1577. 

  1578.     return 0;

  1579. }

  1580. 

  1581. static int read_header(FFV1Context *f){

  1582.     uint8_t state[CONTEXT_SIZE];

  1583.     int i, j, context_count;

  1584.     RangeCoder * const c= &f->slice_context[0]->c;

  1585. 

  1586.     memset(state, 128, sizeof(state));

  1587. 

  1588.     if(f->version < 2){

  1589.         f->version= get_symbol(c, state, 0);

  1590.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1591.         if(f->ac>1){

  1592.             for(i=1; i<256; i++){

  1593.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1594.             }

  1595.         }

  1596.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1597.         if(f->version>0)

  1598.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1599.         get_rac(c, state); //no chroma = false

  1600.         f->chroma_h_shift= get_symbol(c, state, 0);

  1601.         f->chroma_v_shift= get_symbol(c, state, 0);

  1602.         get_rac(c, state); //transparency plane

  1603.         f->plane_count= 2;

  1604.     }

  1605. 

  1606.     if(f->colorspace==0){

  1607.         if(f->avctx->bits_per_raw_sample<=8){

  1608.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1609.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1610.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1611.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1612.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1613.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1614.             default:

  1615.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1616.                 return -1;

  1617.             }

  1618.         }else{

  1619.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1620.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1621.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1622.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1623.             default:

  1624.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1625.                 return -1;

  1626.             }

  1627.         }

  1628.     }else if(f->colorspace==1){

  1629.         if(f->chroma_h_shift || f->chroma_v_shift){

  1630.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1631.             return -1;

  1632.         }

  1633.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1634.     }else{

  1635.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1636.         return -1;

  1637.     }

  1638. 

  1639. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1640.     if(f->version < 2){

  1641.         context_count= read_quant_tables(c, f->quant_table);

  1642.         if(context_count < 0){

  1643.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1644.                 return -1;

  1645.         }

  1646.     }else{

  1647.         f->slice_count= get_symbol(c, state, 0);

  1648.         if(f->slice_count > (unsigned)MAX_SLICES)

  1649.             return -1;

  1650.     }

  1651. 

  1652.     for(j=0; j<f->slice_count; j++){

  1653.         FFV1Context *fs= f->slice_context[j];

  1654.         fs->ac= f->ac;

  1655. 

  1656.         if(f->version >= 2){

  1657.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1658.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1659.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1660.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1661. 

  1662.             fs->slice_x /= f->num_h_slices;

  1663.             fs->slice_y /= f->num_v_slices;

  1664.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1665.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1666.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1667.                 return -1;

  1668.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1669.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1670.                 return -1;

  1671.         }

  1672. 

  1673.         for(i=0; i<f->plane_count; i++){

  1674.             PlaneContext * const p= &fs->plane[i];

  1675. 

  1676.             if(f->version >= 2){

  1677.                 int idx=get_symbol(c, state, 0);

  1678.                 if(idx > (unsigned)f->quant_table_count){

  1679.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1680.                     return -1;

  1681.                 }

  1682.                 p->quant_table_index= idx;

  1683.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1684.                 context_count= f->context_count[idx];

  1685.             }else{

  1686.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1687.             }

  1688. 

  1689.             if(p->context_count < context_count){

  1690.                 av_freep(&p->state);

  1691.                 av_freep(&p->vlc_state);

  1692.             }

  1693.             p->context_count= context_count;

  1694.         }

  1695.     }

  1696. 

  1697.     return 0;

  1698. }

  1699. 

  1700. static av_cold int decode_init(AVCodecContext *avctx)

  1701. {

  1702.     FFV1Context *f = avctx->priv_data;

  1703. 

  1704.     common_init(avctx);

  1705. 

  1706.     if(avctx->extradata && read_extra_header(f) < 0)

  1707.         return -1;

  1708. 

  1709.     if(init_slice_contexts(f) < 0)

  1710.         return -1;

  1711. 

  1712.     return 0;

  1713. }

  1714. 

  1715. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1716.     const uint8_t *buf = avpkt->data;

  1717.     int buf_size = avpkt->size;

  1718.     FFV1Context *f = avctx->priv_data;

  1719.     RangeCoder * const c= &f->slice_context[0]->c;

  1720.     AVFrame * const p= &f->picture;

  1721.     int bytes_read, i;

  1722.     uint8_t keystate= 128;

  1723.     const uint8_t *buf_p;

  1724. 

  1725.     AVFrame *picture = data;

  1726. 

  1727.     /* release previously stored data */

  1728.     if (p->data[0])

  1729.         avctx->release_buffer(avctx, p);

  1730. 

  1731.     ff_init_range_decoder(c, buf, buf_size);

  1732.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1733. 

  1734. 

  1735.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1736.     if(get_rac(c, &keystate)){

  1737.         p->key_frame= 1;

  1738.         if(read_header(f) < 0)

  1739.             return -1;

  1740.         if(init_slice_state(f) < 0)

  1741.             return -1;

  1742. 

  1743.         clear_state(f);

  1744.     }else{

  1745.         p->key_frame= 0;

  1746.     }

  1747.     if(f->ac>1){

  1748.         int i;

  1749.         for(i=1; i<256; i++){

  1750.             c->one_state[i]= f->state_transition[i];

  1751.             c->zero_state[256-i]= 256-c->one_state[i];

  1752.         }

  1753.     }

  1754. 

  1755.     p->reference= 0;

  1756.     if(avctx->get_buffer(avctx, p) < 0){

  1757.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1758.         return -1;

  1759.     }

  1760. 

  1761.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1762.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1763. 

  1764.     if(!f->ac){

  1765.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1766.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1767. //printf("pos=%d\n", bytes_read);

  1768.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, buf_size - bytes_read);

  1769.     } else {

  1770.         bytes_read = 0; /* avoid warning */

  1771.     }

  1772. 

  1773.     buf_p= buf + buf_size;

  1774.     for(i=f->slice_count-1; i>0; i--){

  1775.         FFV1Context *fs= f->slice_context[i];

  1776.         int v= AV_RB24(buf_p-3)+3;

  1777.         if(buf_p - buf <= v){

  1778.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1779.             return -1;

  1780.         }

  1781.         buf_p -= v;

  1782.         if(fs->ac){

  1783.             ff_init_range_decoder(&fs->c, buf_p, v);

  1784.         }else{

  1785.             init_get_bits(&fs->gb, buf_p, v);

  1786.         }

  1787.     }

  1788. 

  1789.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1790.     f->picture_number++;

  1791. 

  1792.     *picture= *p;

  1793.     *data_size = sizeof(AVFrame);

  1794. 

  1795.     return buf_size;

  1796. }

  1797. 

  1798. AVCodec ff_ffv1_decoder = {

  1799.     "ffv1",

  1800.     AVMEDIA_TYPE_VIDEO,

  1801.     CODEC_ID_FFV1,

  1802.     sizeof(FFV1Context),

  1803.     decode_init,

  1804.     NULL,

  1805.     common_end,

  1806.     decode_frame,

  1807.     CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ | CODEC_CAP_SLICE_THREADS,

  1808.     NULL,

  1809.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1810. };

  1811. 

  1812. #if CONFIG_FFV1_ENCODER

  1813. AVCodec ff_ffv1_encoder = {

  1814.     "ffv1",

  1815.     AVMEDIA_TYPE_VIDEO,

  1816.     CODEC_ID_FFV1,

  1817.     sizeof(FFV1Context),

  1818.     encode_init,

  1819.     encode_frame,

  1820.     common_end,

  1821.     .capabilities = CODEC_CAP_SLICE_THREADS,

  1822.     .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},

  1823.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1824. };

  1825. #endif