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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. 

  42. extern const uint8_t ff_log2_run[32];

  43. 

  44. static const int8_t quant3[256]={

  45.  0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  46.  1, 1, 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, 0,

  61. };

  62. 

  63. static const int8_t quant5_10bit[256]={

  64.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

  65.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  68.  2, 2, 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,-1,

  77. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-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,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  80. };

  81. 

  82. static const int8_t quant5[256]={

  83.  0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  84.  2, 2, 2, 2, 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,-1,-1,-1,

  99. };

  100. static const int8_t quant7[256]={

  101.  0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  102.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  103.  2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,

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

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

  116. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,

  117. };

  118. static const int8_t quant9[256]={

  119.  0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  120.  3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

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

  134. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,

  135. };

  136. static const int8_t quant9_10bit[256]={

  137.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  138.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

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

  140.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

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

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

  151. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  152. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  153. };

  154. 

  155. static const int8_t quant11[256]={

  156.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

  157.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  158.  4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

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

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

  171. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  172. };

  173. static const int8_t quant13[256]={

  174.  0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

  175.  4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

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

  177.  5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,

  178.  6, 6, 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,-5,

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

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

  189. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,

  190. };

  191. 

  192. static const uint8_t ver2_state[256]= {

  193.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  194.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  195.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  196.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  197.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  198.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  199.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  200.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

  201.  165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  202.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  203.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  204.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

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

  206.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  207.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  208.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  209. };

  210. 

  211. typedef struct VlcState{

  212.     int16_t drift;

  213.     uint16_t error_sum;

  214.     int8_t bias;

  215.     uint8_t count;

  216. } VlcState;

  217. 

  218. typedef struct PlaneContext{

  219.     int16_t quant_table[5][256];

  220.     int context_count;

  221.     uint8_t (*state)[CONTEXT_SIZE];

  222.     VlcState *vlc_state;

  223.     uint8_t interlace_bit_state[2];

  224. } PlaneContext;

  225. 

  226. #define MAX_SLICES 256

  227. 

  228. typedef struct FFV1Context{

  229.     AVCodecContext *avctx;

  230.     RangeCoder c;

  231.     GetBitContext gb;

  232.     PutBitContext pb;

  233.     int version;

  234.     int width, height;

  235.     int chroma_h_shift, chroma_v_shift;

  236.     int flags;

  237.     int picture_number;

  238.     AVFrame picture;

  239.     int plane_count;

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

  241.     PlaneContext plane[MAX_PLANES];

  242.     int16_t quant_table[5][256];

  243.     int16_t quant_tables[MAX_QUANT_TABLES][5][256];

  244.     int context_count[MAX_QUANT_TABLES];

  245.     uint8_t state_transition[256];

  246.     int run_index;

  247.     int colorspace;

  248.     int_fast16_t *sample_buffer;

  249. 

  250.     int quant_table_count;

  251. 

  252.     DSPContext dsp;

  253. 

  254.     struct FFV1Context *slice_context[MAX_SLICES];

  255.     int slice_count;

  256.     int num_v_slices;

  257.     int num_h_slices;

  258.     int slice_width;

  259.     int slice_height;

  260.     int slice_x;

  261.     int slice_y;

  262. }FFV1Context;

  263. 

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

  265.     if(bits==8)

  266.         diff= (int8_t)diff;

  267.     else{

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

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

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

  271.     }

  272. 

  273.     return diff;

  274. }

  275. 

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

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

  278.     const int  T= last[ 0];

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

  280. 

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

  282. }

  283. 

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

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

  286.     const int  T= last[ 0];

  287.     const int RT= last[ 1];

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

  289. 

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

  291.         const int TT= last2[0];

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

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

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

  295.     }else

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

  297. }

  298. 

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

  300.     int i;

  301. 

  302.     if(v){

  303.         const int a= FFABS(v);

  304.         const int e= av_log2(a);

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

  306.         if(e<=9){

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

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

  309.             }

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

  311. 

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

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

  314.             }

  315. 

  316.             if(is_signed)

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

  318.         }else{

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

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

  321.             }

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

  323. 

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

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

  326.             }

  327. 

  328.             if(is_signed)

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

  330.         }

  331.     }else{

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

  333.     }

  334. }

  335. 

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

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

  338. }

  339. 

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

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

  342.         return 0;

  343.     else{

  344.         int i, e, a;

  345.         e= 0;

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

  347.             e++;

  348.         }

  349. 

  350.         a= 1;

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

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

  353.         }

  354. 

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

  356.         return (a^e)-e;

  357.     }

  358. }

  359. 

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

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

  362. }

  363. 

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

  365.     int drift= state->drift;

  366.     int count= state->count;

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

  368.     drift += v;

  369. 

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

  371.         count >>= 1;

  372.         drift >>= 1;

  373.         state->error_sum >>= 1;

  374.     }

  375.     count++;

  376. 

  377.     if(drift <= -count){

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

  379. 

  380.         drift += count;

  381.         if(drift <= -count)

  382.             drift= -count + 1;

  383.     }else if(drift > 0){

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

  385. 

  386.         drift -= count;

  387.         if(drift > 0)

  388.             drift= 0;

  389.     }

  390. 

  391.     state->drift= drift;

  392.     state->count= count;

  393. }

  394. 

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

  396.     int i, k, code;

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

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

  399. 

  400.     i= state->count;

  401.     k=0;

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

  403.         k++;

  404.         i += i;

  405.     }

  406. 

  407.     assert(k<=8);

  408. 

  409. #if 0 // JPEG LS

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

  411.     else                                         code= v;

  412. #else

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

  414. #endif

  415. 

  416. //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);

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

  418. 

  419.     update_vlc_state(state, v);

  420. }

  421. 

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

  423.     int k, i, v, ret;

  424. 

  425.     i= state->count;

  426.     k=0;

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

  428.         k++;

  429.         i += i;

  430.     }

  431. 

  432.     assert(k<=8);

  433. 

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

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

  436. 

  437. #if 0 // JPEG LS

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

  439. #else

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

  441. #endif

  442. 

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

  444. 

  445.     update_vlc_state(state, v);

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

  447.     return ret;

  448. }

  449. 

  450. #if CONFIG_FFV1_ENCODER

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

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

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

  454.     int x;

  455.     int run_index= s->run_index;

  456.     int run_count=0;

  457.     int run_mode=0;

  458. 

  459.     if(s->ac){

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

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

  462.             return -1;

  463.         }

  464.     }else{

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

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

  467.             return -1;

  468.         }

  469.     }

  470. 

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

  472.         int diff, context;

  473. 

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

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

  476. 

  477.         if(context < 0){

  478.             context = -context;

  479.             diff= -diff;

  480.         }

  481. 

  482.         diff= fold(diff, bits);

  483. 

  484.         if(s->ac){

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

  486.         }else{

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

  488. 

  489.             if(run_mode){

  490. 

  491.                 if(diff){

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

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

  494.                         run_index++;

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

  496.                     }

  497. 

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

  499.                     if(run_index) run_index--;

  500.                     run_count=0;

  501.                     run_mode=0;

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

  503.                 }else{

  504.                     run_count++;

  505.                 }

  506.             }

  507. 

  508. //            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));

  509. 

  510.             if(run_mode == 0)

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

  512.         }

  513.     }

  514.     if(run_mode){

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

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

  517.             run_index++;

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

  519.         }

  520. 

  521.         if(run_count)

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

  523.     }

  524.     s->run_index= run_index;

  525. 

  526.     return 0;

  527. }

  528. 

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

  530.     int x,y,i;

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

  532.     int_fast16_t *sample[3];

  533.     s->run_index=0;

  534. 

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

  536. 

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

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

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

  540. 

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

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

  543. //{START_TIMER

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

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

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

  547.             }

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

  549.         }else{

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

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

  552.             }

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

  554.         }

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

  556.     }

  557. }

  558. 

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

  560.     int x, y, p, i;

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

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

  563.     s->run_index=0;

  564. 

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

  566. 

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

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

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

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

  571. 

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

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

  574.             int b= v&0xFF;

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

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

  577. 

  578.             b -= g;

  579.             r -= g;

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

  581.             b += 0x100;

  582.             r += 0x100;

  583. 

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

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

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

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

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

  589.         }

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

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

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

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

  594.         }

  595.     }

  596. }

  597. 

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

  599.     int last=0;

  600.     int i;

  601.     uint8_t state[CONTEXT_SIZE];

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

  603. 

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

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

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

  607.             last= i;

  608.         }

  609.     }

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

  611. }

  612. 

  613. static void write_quant_tables(RangeCoder *c, int16_t quant_table[5][256]){

  614.     int i;

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

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

  617. }

  618. 

  619. static void write_header(FFV1Context *f){

  620.     uint8_t state[CONTEXT_SIZE];

  621.     int i, j;

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

  623. 

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

  625. 

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

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

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

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

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

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

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

  633.             }

  634.         }

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

  636.         if(f->version>0)

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

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

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

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

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

  642. 

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

  644.     }else{

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

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

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

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

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

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

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

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

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

  654.         }

  655.     }

  656. }

  657. #endif /* CONFIG_FFV1_ENCODER */

  658. 

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

  660.     FFV1Context *s = avctx->priv_data;

  661. 

  662.     s->avctx= avctx;

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

  664. 

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

  666. 

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

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

  669. 

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

  671.     //defaults

  672.     s->num_h_slices=1;

  673.     s->num_v_slices=1;

  674. 

  675. 

  676.     return 0;

  677. }

  678. 

  679. #if CONFIG_FFV1_ENCODER

  680. static int write_extra_header(FFV1Context *f){

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

  682.     uint8_t state[CONTEXT_SIZE];

  683.     int i;

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

  685. 

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

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

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

  689. 

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

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

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

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

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

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

  696.         }

  697.     }

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

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

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

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

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

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

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

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

  706. 

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

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

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

  710. 

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

  712. 

  713.     return 0;

  714. }

  715. 

  716. static int init_slice_state(FFV1Context *f){

  717.     int i, j;

  718. 

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

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

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

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

  723. 

  724.             if(fs->ac){

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

  726.                 if(!p->    state)

  727.                     return AVERROR(ENOMEM);

  728.             }else{

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

  730.                 if(!p->vlc_state)

  731.                     return AVERROR(ENOMEM);

  732.             }

  733.         }

  734. 

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

  736.             //FIXME only redo if state_transition changed

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

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

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

  740.             }

  741.         }

  742.     }

  743. 

  744.     return 0;

  745. }

  746. 

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

  748.     int i;

  749. 

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

  751. 

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

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

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

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

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

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

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

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

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

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

  762. 

  763.         fs->slice_width = sxe - sxs;

  764.         fs->slice_height= sye - sys;

  765.         fs->slice_x     = sxs;

  766.         fs->slice_y     = sys;

  767. 

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

  769.         if (!fs->sample_buffer)

  770.             return AVERROR(ENOMEM);

  771.     }

  772.     return 0;

  773. }

  774. 

  775. static av_cold int encode_init(AVCodecContext *avctx)

  776. {

  777.     FFV1Context *s = avctx->priv_data;

  778.     int i;

  779. 

  780.     common_init(avctx);

  781. 

  782.     s->version=0;

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

  784. 

  785.     s->plane_count=2;

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

  787.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  797.         }else{

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

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

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

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

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

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

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

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

  806.         }

  807.     }

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

  809. 

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

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

  812. 

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

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

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

  816.         }else{

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

  818.         }

  819.     }

  820. 

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

  822.     switch(avctx->pix_fmt){

  823.     case PIX_FMT_YUV444P16:

  824.     case PIX_FMT_YUV422P16:

  825.     case PIX_FMT_YUV420P16:

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

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

  828.             return -1;

  829.         }

  830.         if(!s->ac){

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

  832.             return -1;

  833.         }

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

  835.     case PIX_FMT_YUV444P:

  836.     case PIX_FMT_YUV422P:

  837.     case PIX_FMT_YUV420P:

  838.     case PIX_FMT_YUV411P:

  839.     case PIX_FMT_YUV410P:

  840.         s->colorspace= 0;

  841.         break;

  842.     case PIX_FMT_RGB32:

  843.         s->colorspace= 1;

  844.         break;

  845.     default:

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

  847.         return -1;

  848.     }

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

  850. 

  851.     s->picture_number=0;

  852. 

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

  854.         s->num_h_slices=2;

  855.         s->num_v_slices=2;

  856.         write_extra_header(s);

  857.     }

  858. 

  859.     if(init_slice_contexts(s) < 0)

  860.         return -1;

  861.     if(init_slice_state(s) < 0)

  862.         return -1;

  863. 

  864.     return 0;

  865. }

  866. #endif /* CONFIG_FFV1_ENCODER */

  867. 

  868. 

  869. static void clear_state(FFV1Context *f){

  870.     int i, si, j;

  871. 

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

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

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

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

  876. 

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

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

  879. 

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

  881.                 if(fs->ac){

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

  883.                 }else{

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

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

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

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

  888.                 }

  889.             }

  890.         }

  891.     }

  892. }

  893. 

  894. #if CONFIG_FFV1_ENCODER

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

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

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

  898.     int width = fs->slice_width;

  899.     int height= fs->slice_height;

  900.     int x= fs->slice_x;

  901.     int y= fs->slice_y;

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

  903. 

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

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

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

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

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

  909. 

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

  911. 

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

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

  914.     }else{

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

  916.     }

  917.     emms_c();

  918. 

  919.     return 0;

  920. }

  921. 

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

  923.     FFV1Context *f = avctx->priv_data;

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

  925.     AVFrame *pict = data;

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

  927.     int used_count= 0;

  928.     uint8_t keystate=128;

  929.     uint8_t *buf_p;

  930.     int i;

  931. 

  932.     ff_init_range_encoder(c, buf, buf_size);

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

  934. 

  935.     *p = *pict;

  936.     p->pict_type= FF_I_TYPE;

  937. 

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

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

  940.         p->key_frame= 1;

  941.         write_header(f);

  942.         clear_state(f);

  943.     }else{

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

  945.         p->key_frame= 0;

  946.     }

  947. 

  948.     if(!f->ac){

  949.         used_count += ff_rac_terminate(c);

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

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

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

  953.         int i;

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

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

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

  957.         }

  958.     }

  959. 

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

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

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

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

  964. 

  965.         if(fs->ac){

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

  967.         }else{

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

  969.         }

  970.     }

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

  972. 

  973.     buf_p=buf;

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

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

  976.         int bytes;

  977. 

  978.         if(fs->ac){

  979.             uint8_t state=128;

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

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

  982.         }else{

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

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

  985.             used_count= 0;

  986.         }

  987.         if(i>0){

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

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

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

  991.             AV_WB24(buf_p+bytes, bytes);

  992.             bytes+=3;

  993.         }

  994.         buf_p += bytes;

  995.     }

  996. 

  997.     f->picture_number++;

  998.     return buf_p-buf;

  999. }

  1000. #endif /* CONFIG_FFV1_ENCODER */

  1001. 

  1002. static av_cold int common_end(AVCodecContext *avctx){

  1003.     FFV1Context *s = avctx->priv_data;

  1004.     int i, j;

  1005. 

  1006.     for(j=0; j<s->slice_count; j++){

  1007.         FFV1Context *fs= s->slice_context[j];

  1008.         for(i=0; i<s->plane_count; i++){

  1009.             PlaneContext *p= &fs->plane[i];

  1010. 

  1011.             av_freep(&p->state);

  1012.             av_freep(&p->vlc_state);

  1013.         }

  1014.         av_freep(&fs->sample_buffer);

  1015.     }

  1016. 

  1017.     return 0;

  1018. }

  1019. 

  1020. static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){

  1021.     PlaneContext * const p= &s->plane[plane_index];

  1022.     RangeCoder * const c= &s->c;

  1023.     int x;

  1024.     int run_count=0;

  1025.     int run_mode=0;

  1026.     int run_index= s->run_index;

  1027. 

  1028.     for(x=0; x<w; x++){

  1029.         int diff, context, sign;

  1030. 

  1031.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1032.         if(context < 0){

  1033.             context= -context;

  1034.             sign=1;

  1035.         }else

  1036.             sign=0;

  1037. 

  1038.         av_assert2(context < p->context_count);

  1039. 

  1040.         if(s->ac){

  1041.             diff= get_symbol_inline(c, p->state[context], 1);

  1042.         }else{

  1043.             if(context == 0 && run_mode==0) run_mode=1;

  1044. 

  1045.             if(run_mode){

  1046.                 if(run_count==0 && run_mode==1){

  1047.                     if(get_bits1(&s->gb)){

  1048.                         run_count = 1<<ff_log2_run[run_index];

  1049.                         if(x + run_count <= w) run_index++;

  1050.                     }else{

  1051.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1052.                         else run_count=0;

  1053.                         if(run_index) run_index--;

  1054.                         run_mode=2;

  1055.                     }

  1056.                 }

  1057.                 run_count--;

  1058.                 if(run_count < 0){

  1059.                     run_mode=0;

  1060.                     run_count=0;

  1061.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1062.                     if(diff>=0) diff++;

  1063.                 }else

  1064.                     diff=0;

  1065.             }else

  1066.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1067. 

  1068. //            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));

  1069.         }

  1070. 

  1071.         if(sign) diff= -diff;

  1072. 

  1073.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1074.     }

  1075.     s->run_index= run_index;

  1076. }

  1077. 

  1078. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1079.     int x, y;

  1080.     int_fast16_t *sample[2];

  1081.     sample[0]=s->sample_buffer    +3;

  1082.     sample[1]=s->sample_buffer+w+6+3;

  1083. 

  1084.     s->run_index=0;

  1085. 

  1086.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1087. 

  1088.     for(y=0; y<h; y++){

  1089.         int_fast16_t *temp= sample[0]; //FIXME try a normal buffer

  1090. 

  1091.         sample[0]= sample[1];

  1092.         sample[1]= temp;

  1093. 

  1094.         sample[1][-1]= sample[0][0  ];

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

  1096. 

  1097. //{START_TIMER

  1098.         if(s->avctx->bits_per_raw_sample <= 8){

  1099.             decode_line(s, w, sample, plane_index, 8);

  1100.             for(x=0; x<w; x++){

  1101.                 src[x + stride*y]= sample[1][x];

  1102.             }

  1103.         }else{

  1104.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1105.             for(x=0; x<w; x++){

  1106.                 ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1107.             }

  1108.         }

  1109. //STOP_TIMER("decode-line")}

  1110.     }

  1111. }

  1112. 

  1113. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1114.     int x, y, p;

  1115.     int_fast16_t *sample[3][2];

  1116.     for(x=0; x<3; x++){

  1117.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1118.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1119.     }

  1120. 

  1121.     s->run_index=0;

  1122. 

  1123.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1124. 

  1125.     for(y=0; y<h; y++){

  1126.         for(p=0; p<3; p++){

  1127.             int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer

  1128. 

  1129.             sample[p][0]= sample[p][1];

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

  1131. 

  1132.             sample[p][1][-1]= sample[p][0][0  ];

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

  1134.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1135.         }

  1136.         for(x=0; x<w; x++){

  1137.             int g= sample[0][1][x];

  1138.             int b= sample[1][1][x];

  1139.             int r= sample[2][1][x];

  1140. 

  1141. //            assert(g>=0 && b>=0 && r>=0);

  1142. //            assert(g<256 && b<512 && r<512);

  1143. 

  1144.             b -= 0x100;

  1145.             r -= 0x100;

  1146.             g -= (b + r)>>2;

  1147.             b += g;

  1148.             r += g;

  1149. 

  1150.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1151.         }

  1152.     }

  1153. }

  1154. 

  1155. static int decode_slice(AVCodecContext *c, void *arg){

  1156.     FFV1Context *fs= *(void**)arg;

  1157.     FFV1Context *f= fs->avctx->priv_data;

  1158.     int width = fs->slice_width;

  1159.     int height= fs->slice_height;

  1160.     int x= fs->slice_x;

  1161.     int y= fs->slice_y;

  1162.     AVFrame * const p= &f->picture;

  1163. 

  1164.     av_assert1(width && height);

  1165.     if(f->colorspace==0){

  1166.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1167.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1168.         const int cx= x>>f->chroma_h_shift;

  1169.         const int cy= y>>f->chroma_v_shift;

  1170.         decode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1171. 

  1172.         decode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1173.         decode_plane(fs, p->data[2] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1174.     }else{

  1175.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1176.     }

  1177. 

  1178.     emms_c();

  1179. 

  1180.     return 0;

  1181. }

  1182. 

  1183. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1184.     int v;

  1185.     int i=0;

  1186.     uint8_t state[CONTEXT_SIZE];

  1187. 

  1188.     memset(state, 128, sizeof(state));

  1189. 

  1190.     for(v=0; i<128 ; v++){

  1191.         int len= get_symbol(c, state, 0) + 1;

  1192. 

  1193.         if(len + i > 128) return -1;

  1194. 

  1195.         while(len--){

  1196.             quant_table[i] = scale*v;

  1197.             i++;

  1198. //printf("%2d ",v);

  1199. //if(i%16==0) printf("\n");

  1200.         }

  1201.     }

  1202. 

  1203.     for(i=1; i<128; i++){

  1204.         quant_table[256-i]= -quant_table[i];

  1205.     }

  1206.     quant_table[128]= -quant_table[127];

  1207. 

  1208.     return 2*v - 1;

  1209. }

  1210. 

  1211. static int read_quant_tables(RangeCoder *c, int16_t quant_table[5][256]){

  1212.     int i;

  1213.     int context_count=1;

  1214. 

  1215.     for(i=0; i<5; i++){

  1216.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1217.         if(context_count > 32768U){

  1218.             return -1;

  1219.         }

  1220.     }

  1221.     return (context_count+1)/2;

  1222. }

  1223. 

  1224. static int read_extra_header(FFV1Context *f){

  1225.     RangeCoder * const c= &f->c;

  1226.     uint8_t state[CONTEXT_SIZE];

  1227.     int i;

  1228. 

  1229.     memset(state, 128, sizeof(state));

  1230. 

  1231.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1232.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1233. 

  1234.     f->version= get_symbol(c, state, 0);

  1235.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1236.     if(f->ac>1){

  1237.         for(i=1; i<256; i++){

  1238.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1239.         }

  1240.     }

  1241.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1242.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1243.     get_rac(c, state); //no chroma = false

  1244.     f->chroma_h_shift= get_symbol(c, state, 0);

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

  1246.     get_rac(c, state); //transparency plane

  1247.     f->plane_count= 2;

  1248.     f->num_h_slices= 1 + get_symbol(c, state, 0);

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

  1250.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1251.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1252.         return -1;

  1253.     }

  1254. 

  1255.     f->quant_table_count= get_symbol(c, state, 0);

  1256.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1257.         return -1;

  1258.     for(i=0; i<f->quant_table_count; i++){

  1259.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1260.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1261.             return -1;

  1262.         }

  1263.     }

  1264. 

  1265.     return 0;

  1266. }

  1267. 

  1268. static int read_header(FFV1Context *f){

  1269.     uint8_t state[CONTEXT_SIZE];

  1270.     int i, j, context_count;

  1271.     RangeCoder * const c= &f->slice_context[0]->c;

  1272. 

  1273.     memset(state, 128, sizeof(state));

  1274. 

  1275.     if(f->version < 2){

  1276.         f->version= get_symbol(c, state, 0);

  1277.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1278.         if(f->ac>1){

  1279.             for(i=1; i<256; i++){

  1280.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1281.             }

  1282.         }

  1283.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1284.         if(f->version>0)

  1285.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1286.         get_rac(c, state); //no chroma = false

  1287.         f->chroma_h_shift= get_symbol(c, state, 0);

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

  1289.         get_rac(c, state); //transparency plane

  1290.         f->plane_count= 2;

  1291.     }

  1292. 

  1293.     if(f->colorspace==0){

  1294.         if(f->avctx->bits_per_raw_sample<=8){

  1295.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1296.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1297.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1298.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1299.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1300.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1301.             default:

  1302.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1303.                 return -1;

  1304.             }

  1305.         }else{

  1306.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1307.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1308.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1309.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1310.             default:

  1311.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1312.                 return -1;

  1313.             }

  1314.         }

  1315.     }else if(f->colorspace==1){

  1316.         if(f->chroma_h_shift || f->chroma_v_shift){

  1317.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1318.             return -1;

  1319.         }

  1320.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1321.     }else{

  1322.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1323.         return -1;

  1324.     }

  1325. 

  1326. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1327.     if(f->version < 2){

  1328.         context_count= read_quant_tables(c, f->quant_table);

  1329.         if(context_count < 0){

  1330.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1331.                 return -1;

  1332.         }

  1333.     }else{

  1334.         f->slice_count= get_symbol(c, state, 0);

  1335.         if(f->slice_count > (unsigned)MAX_SLICES)

  1336.             return -1;

  1337.     }

  1338. 

  1339.     for(j=0; j<f->slice_count; j++){

  1340.         FFV1Context *fs= f->slice_context[j];

  1341.         fs->ac= f->ac;

  1342. 

  1343.         if(f->version >= 2){

  1344.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

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

  1346.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1347.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1348. 

  1349.             fs->slice_x /= f->num_h_slices;

  1350.             fs->slice_y /= f->num_v_slices;

  1351.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1352.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1353.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1354.                 return -1;

  1355.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1356.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1357.                 return -1;

  1358.         }

  1359. 

  1360.         for(i=0; i<f->plane_count; i++){

  1361.             PlaneContext * const p= &fs->plane[i];

  1362. 

  1363.             if(f->version >= 2){

  1364.                 int idx=get_symbol(c, state, 0);

  1365.                 if(idx > (unsigned)f->quant_table_count){

  1366.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1367.                     return -1;

  1368.                 }

  1369.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1370.                 context_count= f->context_count[idx];

  1371.             }else{

  1372.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1373.             }

  1374. 

  1375.             if(p->context_count < context_count){

  1376.                 av_freep(&p->state);

  1377.                 av_freep(&p->vlc_state);

  1378.             }

  1379.             p->context_count= context_count;

  1380.         }

  1381.     }

  1382. 

  1383.     return 0;

  1384. }

  1385. 

  1386. static av_cold int decode_init(AVCodecContext *avctx)

  1387. {

  1388.     FFV1Context *f = avctx->priv_data;

  1389. 

  1390.     common_init(avctx);

  1391. 

  1392.     if(avctx->extradata && read_extra_header(f) < 0)

  1393.         return -1;

  1394. 

  1395.     if(init_slice_contexts(f) < 0)

  1396.         return -1;

  1397. 

  1398.     return 0;

  1399. }

  1400. 

  1401. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1402.     const uint8_t *buf = avpkt->data;

  1403.     int buf_size = avpkt->size;

  1404.     FFV1Context *f = avctx->priv_data;

  1405.     RangeCoder * const c= &f->slice_context[0]->c;

  1406.     AVFrame * const p= &f->picture;

  1407.     int bytes_read, i;

  1408.     uint8_t keystate= 128;

  1409.     const uint8_t *buf_p;

  1410. 

  1411.     AVFrame *picture = data;

  1412. 

  1413.     ff_init_range_decoder(c, buf, buf_size);

  1414.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1415. 

  1416. 

  1417.     p->pict_type= FF_I_TYPE; //FIXME I vs. P

  1418.     if(get_rac(c, &keystate)){

  1419.         p->key_frame= 1;

  1420.         if(read_header(f) < 0)

  1421.             return -1;

  1422.         if(init_slice_state(f) < 0)

  1423.             return -1;

  1424. 

  1425.         clear_state(f);

  1426.     }else{

  1427.         p->key_frame= 0;

  1428.     }

  1429.     if(f->ac>1){

  1430.         int i;

  1431.         for(i=1; i<256; i++){

  1432.             c->one_state[i]= f->state_transition[i];

  1433.             c->zero_state[256-i]= 256-c->one_state[i];

  1434.         }

  1435.     }

  1436. 

  1437.     p->reference= 0;

  1438.     if(avctx->get_buffer(avctx, p) < 0){

  1439.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1440.         return -1;

  1441.     }

  1442. 

  1443.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1444.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1445. 

  1446.     if(!f->ac){

  1447.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1448.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1449. //printf("pos=%d\n", bytes_read);

  1450.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, buf_size - bytes_read);

  1451.     } else {

  1452.         bytes_read = 0; /* avoid warning */

  1453.     }

  1454. 

  1455.     buf_p= buf + buf_size;

  1456.     for(i=f->slice_count-1; i>0; i--){

  1457.         FFV1Context *fs= f->slice_context[i];

  1458.         int v= AV_RB24(buf_p-3)+3;

  1459.         if(buf_p - buf <= v){

  1460.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1461.             return -1;

  1462.         }

  1463.         buf_p -= v;

  1464.         if(fs->ac){

  1465.             ff_init_range_decoder(&fs->c, buf_p, v);

  1466.         }else{

  1467.             init_get_bits(&fs->gb, buf_p, v);

  1468.         }

  1469.     }

  1470. 

  1471.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1472.     f->picture_number++;

  1473. 

  1474.     *picture= *p;

  1475. 

  1476.     avctx->release_buffer(avctx, p); //FIXME

  1477. 

  1478.     *data_size = sizeof(AVFrame);

  1479. 

  1480.     return buf_size;

  1481. }

  1482. 

  1483. AVCodec ffv1_decoder = {

  1484.     "ffv1",

  1485.     AVMEDIA_TYPE_VIDEO,

  1486.     CODEC_ID_FFV1,

  1487.     sizeof(FFV1Context),

  1488.     decode_init,

  1489.     NULL,

  1490.     common_end,

  1491.     decode_frame,

  1492.     CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,

  1493.     NULL,

  1494.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1495. };

  1496. 

  1497. #if CONFIG_FFV1_ENCODER

  1498. AVCodec ffv1_encoder = {

  1499.     "ffv1",

  1500.     AVMEDIA_TYPE_VIDEO,

  1501.     CODEC_ID_FFV1,

  1502.     sizeof(FFV1Context),

  1503.     encode_init,

  1504.     encode_frame,

  1505.     common_end,

  1506.     .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},

  1507.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1508. };

  1509. #endif