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FFmpeg/libavcodec/ffv1.c

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  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 context_count;

  222.     uint8_t (*state)[CONTEXT_SIZE];

  223.     VlcState *vlc_state;

  224.     uint8_t interlace_bit_state[2];

  225. } PlaneContext;

  226. 

  227. #define MAX_SLICES 256

  228. 

  229. typedef struct FFV1Context{

  230.     AVCodecContext *avctx;

  231.     RangeCoder c;

  232.     GetBitContext gb;

  233.     PutBitContext pb;

  234.     int version;

  235.     int width, height;

  236.     int chroma_h_shift, chroma_v_shift;

  237.     int flags;

  238.     int picture_number;

  239.     AVFrame picture;

  240.     int plane_count;

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

  242.     PlaneContext plane[MAX_PLANES];

  243.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  245.     int context_count[MAX_QUANT_TABLES];

  246.     uint8_t state_transition[256];

  247.     int run_index;

  248.     int colorspace;

  249.     int_fast16_t *sample_buffer;

  250. 

  251.     int quant_table_count;

  252. 

  253.     DSPContext dsp;

  254. 

  255.     struct FFV1Context *slice_context[MAX_SLICES];

  256.     int slice_count;

  257.     int num_v_slices;

  258.     int num_h_slices;

  259.     int slice_width;

  260.     int slice_height;

  261.     int slice_x;

  262.     int slice_y;

  263. }FFV1Context;

  264. 

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

  266.     if(bits==8)

  267.         diff= (int8_t)diff;

  268.     else{

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

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

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

  272.     }

  273. 

  274.     return diff;

  275. }

  276. 

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

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

  279.     const int  T= last[ 0];

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

  281. 

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

  283. }

  284. 

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

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

  287.     const int  T= last[ 0];

  288.     const int RT= last[ 1];

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

  290. 

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

  292.         const int TT= last2[0];

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

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

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

  296.     }else

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

  298. }

  299. 

  300. static inline void put_symbol_inline(RangeCoder *c, uint8_t *state, int v, int is_signed){

  301.     int i;

  302. 

  303.     if(v){

  304.         const int a= FFABS(v);

  305.         const int e= av_log2(a);

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

  307.         if(e<=9){

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

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

  310.             }

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

  312. 

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

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

  315.             }

  316. 

  317.             if(is_signed)

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

  319.         }else{

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

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

  322.             }

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

  324. 

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

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

  327.             }

  328. 

  329.             if(is_signed)

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

  331.         }

  332.     }else{

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

  334.     }

  335. }

  336. 

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

  338.     put_symbol_inline(c, state, v, is_signed);

  339. }

  340. 

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

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

  343.         return 0;

  344.     else{

  345.         int i, e, a;

  346.         e= 0;

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

  348.             e++;

  349.         }

  350. 

  351.         a= 1;

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

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

  354.         }

  355. 

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

  357.         return (a^e)-e;

  358.     }

  359. }

  360. 

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

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

  363. }

  364. 

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

  366.     int drift= state->drift;

  367.     int count= state->count;

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

  369.     drift += v;

  370. 

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

  372.         count >>= 1;

  373.         drift >>= 1;

  374.         state->error_sum >>= 1;

  375.     }

  376.     count++;

  377. 

  378.     if(drift <= -count){

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

  380. 

  381.         drift += count;

  382.         if(drift <= -count)

  383.             drift= -count + 1;

  384.     }else if(drift > 0){

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

  386. 

  387.         drift -= count;

  388.         if(drift > 0)

  389.             drift= 0;

  390.     }

  391. 

  392.     state->drift= drift;

  393.     state->count= count;

  394. }

  395. 

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

  397.     int i, k, code;

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

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

  400. 

  401.     i= state->count;

  402.     k=0;

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

  404.         k++;

  405.         i += i;

  406.     }

  407. 

  408.     assert(k<=8);

  409. 

  410. #if 0 // JPEG LS

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

  412.     else                                         code= v;

  413. #else

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

  415. #endif

  416. 

  417. //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);

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

  419. 

  420.     update_vlc_state(state, v);

  421. }

  422. 

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

  424.     int k, i, v, ret;

  425. 

  426.     i= state->count;

  427.     k=0;

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

  429.         k++;

  430.         i += i;

  431.     }

  432. 

  433.     assert(k<=8);

  434. 

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

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

  437. 

  438. #if 0 // JPEG LS

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

  440. #else

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

  442. #endif

  443. 

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

  445. 

  446.     update_vlc_state(state, v);

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

  448.     return ret;

  449. }

  450. 

  451. #if CONFIG_FFV1_ENCODER

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

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

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

  455.     int x;

  456.     int run_index= s->run_index;

  457.     int run_count=0;

  458.     int run_mode=0;

  459. 

  460.     if(s->ac){

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

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

  463.             return -1;

  464.         }

  465.     }else{

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

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

  468.             return -1;

  469.         }

  470.     }

  471. 

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

  473.         int diff, context;

  474. 

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

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

  477. 

  478.         if(context < 0){

  479.             context = -context;

  480.             diff= -diff;

  481.         }

  482. 

  483.         diff= fold(diff, bits);

  484. 

  485.         if(s->ac){

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

  487.         }else{

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

  489. 

  490.             if(run_mode){

  491. 

  492.                 if(diff){

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

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

  495.                         run_index++;

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

  497.                     }

  498. 

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

  500.                     if(run_index) run_index--;

  501.                     run_count=0;

  502.                     run_mode=0;

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

  504.                 }else{

  505.                     run_count++;

  506.                 }

  507.             }

  508. 

  509. //            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));

  510. 

  511.             if(run_mode == 0)

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

  513.         }

  514.     }

  515.     if(run_mode){

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

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

  518.             run_index++;

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

  520.         }

  521. 

  522.         if(run_count)

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

  524.     }

  525.     s->run_index= run_index;

  526. 

  527.     return 0;

  528. }

  529. 

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

  531.     int x,y,i;

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

  533.     int_fast16_t *sample[3];

  534.     s->run_index=0;

  535. 

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

  537. 

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

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

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

  541. 

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

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

  544. //{START_TIMER

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

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

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

  548.             }

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

  550.         }else{

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

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

  553.             }

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

  555.         }

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

  557.     }

  558. }

  559. 

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

  561.     int x, y, p, i;

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

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

  564.     s->run_index=0;

  565. 

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

  567. 

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

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

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

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

  572. 

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

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

  575.             int b= v&0xFF;

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

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

  578. 

  579.             b -= g;

  580.             r -= g;

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

  582.             b += 0x100;

  583.             r += 0x100;

  584. 

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

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

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

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

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

  590.         }

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

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

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

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

  595.         }

  596.     }

  597. }

  598. 

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

  600.     int last=0;

  601.     int i;

  602.     uint8_t state[CONTEXT_SIZE];

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

  604. 

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

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

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

  608.             last= i;

  609.         }

  610.     }

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

  612. }

  613. 

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

  615.     int i;

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

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

  618. }

  619. 

  620. static void write_header(FFV1Context *f){

  621.     uint8_t state[CONTEXT_SIZE];

  622.     int i, j;

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

  624. 

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

  626. 

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

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

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

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

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

  632.                 f->state_transition[i]=ver2_state[i];

  633.                 put_symbol(c, state, ver2_state[i] - c->one_state[i], 1);

  634.             }

  635.         }

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

  637.         if(f->version>0)

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

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

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

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

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

  643. 

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

  645.     }else{

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

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

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

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

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

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

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

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

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

  655.         }

  656.     }

  657. }

  658. #endif /* CONFIG_FFV1_ENCODER */

  659. 

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

  661.     FFV1Context *s = avctx->priv_data;

  662. 

  663.     s->avctx= avctx;

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

  665. 

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

  667. 

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

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

  670. 

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

  672.     //defaults

  673.     s->num_h_slices=1;

  674.     s->num_v_slices=1;

  675. 

  676. 

  677.     return 0;

  678. }

  679. 

  680. static int init_slice_state(FFV1Context *f){

  681.     int i, j;

  682. 

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

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

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

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

  687. 

  688.             if(fs->ac){

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

  690.                 if(!p->    state)

  691.                     return AVERROR(ENOMEM);

  692.             }else{

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

  694.                 if(!p->vlc_state)

  695.                     return AVERROR(ENOMEM);

  696.             }

  697.         }

  698. 

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

  700.             //FIXME only redo if state_transition changed

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

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

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

  704.             }

  705.         }

  706.     }

  707. 

  708.     return 0;

  709. }

  710. 

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

  712.     int i;

  713. 

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

  715. 

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

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

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

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

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

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

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

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

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

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

  726. 

  727.         fs->slice_width = sxe - sxs;

  728.         fs->slice_height= sye - sys;

  729.         fs->slice_x     = sxs;

  730.         fs->slice_y     = sys;

  731. 

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

  733.         if (!fs->sample_buffer)

  734.             return AVERROR(ENOMEM);

  735.     }

  736.     return 0;

  737. }

  738. 

  739. #if CONFIG_FFV1_ENCODER

  740. static int write_extra_header(FFV1Context *f){

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

  742.     uint8_t state[CONTEXT_SIZE];

  743.     int i;

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

  745. 

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

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

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

  749. 

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

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

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

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

  754.             f->state_transition[i]=ver2_state[i];

  755.             put_symbol(c, state, ver2_state[i] - c->one_state[i], 1);

  756.         }

  757.     }

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

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

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

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

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

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

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

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

  766. 

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

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

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

  770. 

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

  772. 

  773.     return 0;

  774. }

  775. 

  776. static av_cold int encode_init(AVCodecContext *avctx)

  777. {

  778.     FFV1Context *s = avctx->priv_data;

  779.     int i;

  780. 

  781.     common_init(avctx);

  782. 

  783.     s->version=0;

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

  785. 

  786.     s->plane_count=2;

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

  788.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  798.         }else{

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

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

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

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

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

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

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

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

  807.         }

  808.     }

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

  810. 

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

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

  813. 

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

  815.         if(avctx->context_model==0){

  816.             p->context_count= (11*11*11+1)/2;

  817.         }else{

  818.             p->context_count= (11*11*5*5*5+1)/2;

  819.         }

  820.     }

  821. 

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

  823.     switch(avctx->pix_fmt){

  824.     case PIX_FMT_YUV444P16:

  825.     case PIX_FMT_YUV422P16:

  826.     case PIX_FMT_YUV420P16:

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

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

  829.             return -1;

  830.         }

  831.         if(!s->ac){

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

  833.             return -1;

  834.         }

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

  836.     case PIX_FMT_YUV444P:

  837.     case PIX_FMT_YUV422P:

  838.     case PIX_FMT_YUV420P:

  839.     case PIX_FMT_YUV411P:

  840.     case PIX_FMT_YUV410P:

  841.         s->colorspace= 0;

  842.         break;

  843.     case PIX_FMT_RGB32:

  844.         s->colorspace= 1;

  845.         break;

  846.     default:

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

  848.         return -1;

  849.     }

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

  851. 

  852.     s->picture_number=0;

  853. 

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

  855.         s->num_h_slices=2;

  856.         s->num_v_slices=2;

  857.         write_extra_header(s);

  858.     }

  859. 

  860.     if(init_slice_contexts(s) < 0)

  861.         return -1;

  862.     if(init_slice_state(s) < 0)

  863.         return -1;

  864. 

  865.     return 0;

  866. }

  867. #endif /* CONFIG_FFV1_ENCODER */

  868. 

  869. 

  870. static void clear_state(FFV1Context *f){

  871.     int i, si, j;

  872. 

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

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

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

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

  877. 

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

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

  880. 

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

  882.                 if(fs->ac){

  883.                     memset(p->state[j], 128, sizeof(uint8_t)*CONTEXT_SIZE);

  884.                 }else{

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

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

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

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

  889.                 }

  890.             }

  891.         }

  892.     }

  893. }

  894. 

  895. #if CONFIG_FFV1_ENCODER

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

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

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

  899.     int width = fs->slice_width;

  900.     int height= fs->slice_height;

  901.     int x= fs->slice_x;

  902.     int y= fs->slice_y;

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

  904. 

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

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

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

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

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

  910. 

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

  912. 

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

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

  915.     }else{

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

  917.     }

  918.     emms_c();

  919. 

  920.     return 0;

  921. }

  922. 

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

  924.     FFV1Context *f = avctx->priv_data;

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

  926.     AVFrame *pict = data;

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

  928.     int used_count= 0;

  929.     uint8_t keystate=128;

  930.     uint8_t *buf_p;

  931.     int i;

  932. 

  933.     ff_init_range_encoder(c, buf, buf_size);

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

  935. 

  936.     *p = *pict;

  937.     p->pict_type= FF_I_TYPE;

  938. 

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

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

  941.         p->key_frame= 1;

  942.         write_header(f);

  943.         clear_state(f);

  944.     }else{

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

  946.         p->key_frame= 0;

  947.     }

  948. 

  949.     if(!f->ac){

  950.         used_count += ff_rac_terminate(c);

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

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

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

  954.         int i;

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

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

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

  958.         }

  959.     }

  960. 

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

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

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

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

  965. 

  966.         if(fs->ac){

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

  968.         }else{

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

  970.         }

  971.     }

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

  973. 

  974.     buf_p=buf;

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

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

  977.         int bytes;

  978. 

  979.         if(fs->ac){

  980.             uint8_t state=128;

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

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

  983.         }else{

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

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

  986.             used_count= 0;

  987.         }

  988.         if(i>0){

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

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

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

  992.             AV_WB24(buf_p+bytes, bytes);

  993.             bytes+=3;

  994.         }

  995.         buf_p += bytes;

  996.     }

  997. 

  998.     f->picture_number++;

  999.     return buf_p-buf;

  1000. }

  1001. #endif /* CONFIG_FFV1_ENCODER */

  1002. 

  1003. static av_cold int common_end(AVCodecContext *avctx){

  1004.     FFV1Context *s = avctx->priv_data;

  1005.     int i, j;

  1006. 

  1007.     for(j=0; j<s->slice_count; j++){

  1008.         FFV1Context *fs= s->slice_context[j];

  1009.         for(i=0; i<s->plane_count; i++){

  1010.             PlaneContext *p= &fs->plane[i];

  1011. 

  1012.             av_freep(&p->state);

  1013.             av_freep(&p->vlc_state);

  1014.         }

  1015.         av_freep(&fs->sample_buffer);

  1016.     }

  1017. 

  1018.     return 0;

  1019. }

  1020. 

  1021. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){

  1022.     PlaneContext * const p= &s->plane[plane_index];

  1023.     RangeCoder * const c= &s->c;

  1024.     int x;

  1025.     int run_count=0;

  1026.     int run_mode=0;

  1027.     int run_index= s->run_index;

  1028. 

  1029.     for(x=0; x<w; x++){

  1030.         int diff, context, sign;

  1031. 

  1032.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1033.         if(context < 0){

  1034.             context= -context;

  1035.             sign=1;

  1036.         }else

  1037.             sign=0;

  1038. 

  1039.         av_assert2(context < p->context_count);

  1040. 

  1041.         if(s->ac){

  1042.             diff= get_symbol_inline(c, p->state[context], 1);

  1043.         }else{

  1044.             if(context == 0 && run_mode==0) run_mode=1;

  1045. 

  1046.             if(run_mode){

  1047.                 if(run_count==0 && run_mode==1){

  1048.                     if(get_bits1(&s->gb)){

  1049.                         run_count = 1<<ff_log2_run[run_index];

  1050.                         if(x + run_count <= w) run_index++;

  1051.                     }else{

  1052.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1053.                         else run_count=0;

  1054.                         if(run_index) run_index--;

  1055.                         run_mode=2;

  1056.                     }

  1057.                 }

  1058.                 run_count--;

  1059.                 if(run_count < 0){

  1060.                     run_mode=0;

  1061.                     run_count=0;

  1062.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1063.                     if(diff>=0) diff++;

  1064.                 }else

  1065.                     diff=0;

  1066.             }else

  1067.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1068. 

  1069. //            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));

  1070.         }

  1071. 

  1072.         if(sign) diff= -diff;

  1073. 

  1074.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1075.     }

  1076.     s->run_index= run_index;

  1077. }

  1078. 

  1079. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1080.     int x, y;

  1081.     int_fast16_t *sample[2];

  1082.     sample[0]=s->sample_buffer    +3;

  1083.     sample[1]=s->sample_buffer+w+6+3;

  1084. 

  1085.     s->run_index=0;

  1086. 

  1087.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1088. 

  1089.     for(y=0; y<h; y++){

  1090.         int_fast16_t *temp= sample[0]; //FIXME try a normal buffer

  1091. 

  1092.         sample[0]= sample[1];

  1093.         sample[1]= temp;

  1094. 

  1095.         sample[1][-1]= sample[0][0  ];

  1096.         sample[0][ w]= sample[0][w-1];

  1097. 

  1098. //{START_TIMER

  1099.         if(s->avctx->bits_per_raw_sample <= 8){

  1100.             decode_line(s, w, sample, plane_index, 8);

  1101.             for(x=0; x<w; x++){

  1102.                 src[x + stride*y]= sample[1][x];

  1103.             }

  1104.         }else{

  1105.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1106.             for(x=0; x<w; x++){

  1107.                 ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1108.             }

  1109.         }

  1110. //STOP_TIMER("decode-line")}

  1111.     }

  1112. }

  1113. 

  1114. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1115.     int x, y, p;

  1116.     int_fast16_t *sample[3][2];

  1117.     for(x=0; x<3; x++){

  1118.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1119.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1120.     }

  1121. 

  1122.     s->run_index=0;

  1123. 

  1124.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1125. 

  1126.     for(y=0; y<h; y++){

  1127.         for(p=0; p<3; p++){

  1128.             int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer

  1129. 

  1130.             sample[p][0]= sample[p][1];

  1131.             sample[p][1]= temp;

  1132. 

  1133.             sample[p][1][-1]= sample[p][0][0  ];

  1134.             sample[p][0][ w]= sample[p][0][w-1];

  1135.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1136.         }

  1137.         for(x=0; x<w; x++){

  1138.             int g= sample[0][1][x];

  1139.             int b= sample[1][1][x];

  1140.             int r= sample[2][1][x];

  1141. 

  1142. //            assert(g>=0 && b>=0 && r>=0);

  1143. //            assert(g<256 && b<512 && r<512);

  1144. 

  1145.             b -= 0x100;

  1146.             r -= 0x100;

  1147.             g -= (b + r)>>2;

  1148.             b += g;

  1149.             r += g;

  1150. 

  1151.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1152.         }

  1153.     }

  1154. }

  1155. 

  1156. static int decode_slice(AVCodecContext *c, void *arg){

  1157.     FFV1Context *fs= *(void**)arg;

  1158.     FFV1Context *f= fs->avctx->priv_data;

  1159.     int width = fs->slice_width;

  1160.     int height= fs->slice_height;

  1161.     int x= fs->slice_x;

  1162.     int y= fs->slice_y;

  1163.     AVFrame * const p= &f->picture;

  1164. 

  1165.     av_assert1(width && height);

  1166.     if(f->colorspace==0){

  1167.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1168.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1169.         const int cx= x>>f->chroma_h_shift;

  1170.         const int cy= y>>f->chroma_v_shift;

  1171.         decode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1172. 

  1173.         decode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1174.         decode_plane(fs, p->data[2] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1175.     }else{

  1176.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1177.     }

  1178. 

  1179.     emms_c();

  1180. 

  1181.     return 0;

  1182. }

  1183. 

  1184. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1185.     int v;

  1186.     int i=0;

  1187.     uint8_t state[CONTEXT_SIZE];

  1188. 

  1189.     memset(state, 128, sizeof(state));

  1190. 

  1191.     for(v=0; i<128 ; v++){

  1192.         int len= get_symbol(c, state, 0) + 1;

  1193. 

  1194.         if(len + i > 128) return -1;

  1195. 

  1196.         while(len--){

  1197.             quant_table[i] = scale*v;

  1198.             i++;

  1199. //printf("%2d ",v);

  1200. //if(i%16==0) printf("\n");

  1201.         }

  1202.     }

  1203. 

  1204.     for(i=1; i<128; i++){

  1205.         quant_table[256-i]= -quant_table[i];

  1206.     }

  1207.     quant_table[128]= -quant_table[127];

  1208. 

  1209.     return 2*v - 1;

  1210. }

  1211. 

  1212. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1213.     int i;

  1214.     int context_count=1;

  1215. 

  1216.     for(i=0; i<5; i++){

  1217.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1218.         if(context_count > 32768U){

  1219.             return -1;

  1220.         }

  1221.     }

  1222.     return (context_count+1)/2;

  1223. }

  1224. 

  1225. static int read_extra_header(FFV1Context *f){

  1226.     RangeCoder * const c= &f->c;

  1227.     uint8_t state[CONTEXT_SIZE];

  1228.     int i;

  1229. 

  1230.     memset(state, 128, sizeof(state));

  1231. 

  1232.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1233.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1234. 

  1235.     f->version= get_symbol(c, state, 0);

  1236.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1237.     if(f->ac>1){

  1238.         for(i=1; i<256; i++){

  1239.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1240.         }

  1241.     }

  1242.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1243.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1244.     get_rac(c, state); //no chroma = false

  1245.     f->chroma_h_shift= get_symbol(c, state, 0);

  1246.     f->chroma_v_shift= get_symbol(c, state, 0);

  1247.     get_rac(c, state); //transparency plane

  1248.     f->plane_count= 2;

  1249.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1250.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1251.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1252.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1253.         return -1;

  1254.     }

  1255. 

  1256.     f->quant_table_count= get_symbol(c, state, 0);

  1257.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1258.         return -1;

  1259.     for(i=0; i<f->quant_table_count; i++){

  1260.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1261.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1262.             return -1;

  1263.         }

  1264.     }

  1265. 

  1266.     return 0;

  1267. }

  1268. 

  1269. static int read_header(FFV1Context *f){

  1270.     uint8_t state[CONTEXT_SIZE];

  1271.     int i, j, context_count;

  1272.     RangeCoder * const c= &f->slice_context[0]->c;

  1273. 

  1274.     memset(state, 128, sizeof(state));

  1275. 

  1276.     if(f->version < 2){

  1277.         f->version= get_symbol(c, state, 0);

  1278.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1279.         if(f->ac>1){

  1280.             for(i=1; i<256; i++){

  1281.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1282.             }

  1283.         }

  1284.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1285.         if(f->version>0)

  1286.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1287.         get_rac(c, state); //no chroma = false

  1288.         f->chroma_h_shift= get_symbol(c, state, 0);

  1289.         f->chroma_v_shift= get_symbol(c, state, 0);

  1290.         get_rac(c, state); //transparency plane

  1291.         f->plane_count= 2;

  1292.     }

  1293. 

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

  1295.         if(f->avctx->bits_per_raw_sample<=8){

  1296.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1297.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1298.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1299.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1300.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1301.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1302.             default:

  1303.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1304.                 return -1;

  1305.             }

  1306.         }else{

  1307.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1308.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1309.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1310.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1311.             default:

  1312.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1313.                 return -1;

  1314.             }

  1315.         }

  1316.     }else if(f->colorspace==1){

  1317.         if(f->chroma_h_shift || f->chroma_v_shift){

  1318.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1319.             return -1;

  1320.         }

  1321.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1322.     }else{

  1323.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1324.         return -1;

  1325.     }

  1326. 

  1327. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1328.     if(f->version < 2){

  1329.         context_count= read_quant_tables(c, f->quant_table);

  1330.         if(context_count < 0){

  1331.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1332.                 return -1;

  1333.         }

  1334.     }else{

  1335.         f->slice_count= get_symbol(c, state, 0);

  1336.         if(f->slice_count > (unsigned)MAX_SLICES)

  1337.             return -1;

  1338.     }

  1339. 

  1340.     for(j=0; j<f->slice_count; j++){

  1341.         FFV1Context *fs= f->slice_context[j];

  1342.         fs->ac= f->ac;

  1343. 

  1344.         if(f->version >= 2){

  1345.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1346.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1347.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1348.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1349. 

  1350.             fs->slice_x /= f->num_h_slices;

  1351.             fs->slice_y /= f->num_v_slices;

  1352.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1353.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1354.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1355.                 return -1;

  1356.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1357.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1358.                 return -1;

  1359.         }

  1360. 

  1361.         for(i=0; i<f->plane_count; i++){

  1362.             PlaneContext * const p= &fs->plane[i];

  1363. 

  1364.             if(f->version >= 2){

  1365.                 int idx=get_symbol(c, state, 0);

  1366.                 if(idx > (unsigned)f->quant_table_count){

  1367.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1368.                     return -1;

  1369.                 }

  1370.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1371.                 context_count= f->context_count[idx];

  1372.             }else{

  1373.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1374.             }

  1375. 

  1376.             if(p->context_count < context_count){

  1377.                 av_freep(&p->state);

  1378.                 av_freep(&p->vlc_state);

  1379.             }

  1380.             p->context_count= context_count;

  1381.         }

  1382.     }

  1383. 

  1384.     return 0;

  1385. }

  1386. 

  1387. static av_cold int decode_init(AVCodecContext *avctx)

  1388. {

  1389.     FFV1Context *f = avctx->priv_data;

  1390. 

  1391.     common_init(avctx);

  1392. 

  1393.     if(avctx->extradata && read_extra_header(f) < 0)

  1394.         return -1;

  1395. 

  1396.     if(init_slice_contexts(f) < 0)

  1397.         return -1;

  1398. 

  1399.     return 0;

  1400. }

  1401. 

  1402. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1403.     const uint8_t *buf = avpkt->data;

  1404.     int buf_size = avpkt->size;

  1405.     FFV1Context *f = avctx->priv_data;

  1406.     RangeCoder * const c= &f->slice_context[0]->c;

  1407.     AVFrame * const p= &f->picture;

  1408.     int bytes_read, i;

  1409.     uint8_t keystate= 128;

  1410.     const uint8_t *buf_p;

  1411. 

  1412.     AVFrame *picture = data;

  1413. 

  1414.     ff_init_range_decoder(c, buf, buf_size);

  1415.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1416. 

  1417. 

  1418.     p->pict_type= FF_I_TYPE; //FIXME I vs. P

  1419.     if(get_rac(c, &keystate)){

  1420.         p->key_frame= 1;

  1421.         if(read_header(f) < 0)

  1422.             return -1;

  1423.         if(init_slice_state(f) < 0)

  1424.             return -1;

  1425. 

  1426.         clear_state(f);

  1427.     }else{

  1428.         p->key_frame= 0;

  1429.     }

  1430.     if(f->ac>1){

  1431.         int i;

  1432.         for(i=1; i<256; i++){

  1433.             c->one_state[i]= f->state_transition[i];

  1434.             c->zero_state[256-i]= 256-c->one_state[i];

  1435.         }

  1436.     }

  1437. 

  1438.     p->reference= 0;

  1439.     if(avctx->get_buffer(avctx, p) < 0){

  1440.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1441.         return -1;

  1442.     }

  1443. 

  1444.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1445.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1446. 

  1447.     if(!f->ac){

  1448.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1449.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1450. //printf("pos=%d\n", bytes_read);

  1451.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, buf_size - bytes_read);

  1452.     } else {

  1453.         bytes_read = 0; /* avoid warning */

  1454.     }

  1455. 

  1456.     buf_p= buf + buf_size;

  1457.     for(i=f->slice_count-1; i>0; i--){

  1458.         FFV1Context *fs= f->slice_context[i];

  1459.         int v= AV_RB24(buf_p-3)+3;

  1460.         if(buf_p - buf <= v){

  1461.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1462.             return -1;

  1463.         }

  1464.         buf_p -= v;

  1465.         if(fs->ac){

  1466.             ff_init_range_decoder(&fs->c, buf_p, v);

  1467.         }else{

  1468.             init_get_bits(&fs->gb, buf_p, v);

  1469.         }

  1470.     }

  1471. 

  1472.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1473.     f->picture_number++;

  1474. 

  1475.     *picture= *p;

  1476. 

  1477.     avctx->release_buffer(avctx, p); //FIXME

  1478. 

  1479.     *data_size = sizeof(AVFrame);

  1480. 

  1481.     return buf_size;

  1482. }

  1483. 

  1484. AVCodec ffv1_decoder = {

  1485.     "ffv1",

  1486.     AVMEDIA_TYPE_VIDEO,

  1487.     CODEC_ID_FFV1,

  1488.     sizeof(FFV1Context),

  1489.     decode_init,

  1490.     NULL,

  1491.     common_end,

  1492.     decode_frame,

  1493.     CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,

  1494.     NULL,

  1495.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1496. };

  1497. 

  1498. #if CONFIG_FFV1_ENCODER

  1499. AVCodec ffv1_encoder = {

  1500.     "ffv1",

  1501.     AVMEDIA_TYPE_VIDEO,

  1502.     CODEC_ID_FFV1,

  1503.     sizeof(FFV1Context),

  1504.     encode_init,

  1505.     encode_frame,

  1506.     common_end,

  1507.     .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},

  1508.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1509. };

  1510. #endif