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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 "internal.h"

  30. #include "get_bits.h"

  31. #include "put_bits.h"

  32. #include "dsputil.h"

  33. #include "rangecoder.h"

  34. #include "golomb.h"

  35. #include "mathops.h"

  36. #include "libavutil/pixdesc.h"

  37. #include "libavutil/avassert.h"

  38. #include "libavutil/crc.h"

  39. #include "libavutil/opt.h"

  40. 

  41. #ifdef __INTEL_COMPILER

  42. #undef av_flatten

  43. #define av_flatten

  44. #endif

  45. 

  46. #define MAX_PLANES 4

  47. #define CONTEXT_SIZE 32

  48. 

  49. #define MAX_QUANT_TABLES 8

  50. #define MAX_CONTEXT_INPUTS 5

  51. 

  52. extern const uint8_t ff_log2_run[41];

  53. 

  54. static const int8_t quant5_10bit[256]={

  55.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  59.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  60.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  61.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  62.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  63. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  64. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  65. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  66. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  67. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

  68. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  69. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  70. -1,-1,-1,-1,-1,-1,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  71. };

  72. 

  73. static const int8_t quant5[256]={

  74.  0, 1, 1, 1, 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, 2,

  78.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  79.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  80.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  81.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  82. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  83. -2,-2,-2,-2,-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,-1,-1,-1,

  90. };

  91. 

  92. static const int8_t quant9_10bit[256]={

  93.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  94.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

  95.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  96.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

  97.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  98.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  99.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  100.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  101. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  102. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  103. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  104. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  105. -4,-4,-4,-4,-4,-4,-4,-4,-4,-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,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  108. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  109. };

  110. 

  111. static const int8_t quant11[256]={

  112.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

  113.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  114.  4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  115.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  116.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  117.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  118.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  119.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  120. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  121. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  122. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  123. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  124. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  125. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-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,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  128. };

  129. 

  130. static const uint8_t ver2_state[256]= {

  131.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  132.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  133.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  134.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  135.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  136.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  137.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  138.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

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

  140.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  141.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  142.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  143.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  144.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  145.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  146.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  147. };

  148. 

  149. typedef struct VlcState{

  150.     int16_t drift;

  151.     uint16_t error_sum;

  152.     int8_t bias;

  153.     uint8_t count;

  154. } VlcState;

  155. 

  156. typedef struct PlaneContext{

  157.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  158.     int quant_table_index;

  159.     int context_count;

  160.     uint8_t (*state)[CONTEXT_SIZE];

  161.     VlcState *vlc_state;

  162.     uint8_t interlace_bit_state[2];

  163. } PlaneContext;

  164. 

  165. #define MAX_SLICES 256

  166. 

  167. typedef struct FFV1Context{

  168.     AVClass *class;

  169.     AVCodecContext *avctx;

  170.     RangeCoder c;

  171.     GetBitContext gb;

  172.     PutBitContext pb;

  173.     uint64_t rc_stat[256][2];

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

  175.     int version;

  176.     int minor_version;

  177.     int width, height;

  178.     int chroma_h_shift, chroma_v_shift;

  179.     int chroma_planes;

  180.     int transparency;

  181.     int flags;

  182.     int picture_number;

  183.     AVFrame picture;

  184.     int plane_count;

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

  186.     int ac_byte_count;                   ///< number of bytes used for AC coding

  187.     PlaneContext plane[MAX_PLANES];

  188.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  190.     int context_count[MAX_QUANT_TABLES];

  191.     uint8_t state_transition[256];

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

  193.     int run_index;

  194.     int colorspace;

  195.     int16_t *sample_buffer;

  196.     int gob_count;

  197.     int packed_at_lsb;

  198.     int ec;

  199.     int key_frame_ok;

  200. 

  201.     int quant_table_count;

  202. 

  203.     DSPContext dsp;

  204. 

  205.     struct FFV1Context *slice_context[MAX_SLICES];

  206.     int slice_count;

  207.     int num_v_slices;

  208.     int num_h_slices;

  209.     int slice_width;

  210.     int slice_height;

  211.     int slice_x;

  212.     int slice_y;

  213.     int bits_per_raw_sample;

  214. }FFV1Context;

  215. 

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

  217.     if(bits==8)

  218.         diff= (int8_t)diff;

  219.     else{

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

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

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

  223.     }

  224. 

  225.     return diff;

  226. }

  227. 

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

  229. {

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

  231.     const int  T= last[ 0];

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

  233. 

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

  235. }

  236. 

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

  238.                               int16_t *last, int16_t *last2)

  239. {

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

  241.     const int  T= last[ 0];

  242.     const int RT= last[ 1];

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

  244. 

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

  246.         const int TT= last2[0];

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

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

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

  250.     }else

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

  252. }

  253. 

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

  255.     int i,j,k,m;

  256.     double l2tab[256];

  257. 

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

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

  260. 

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

  262.         double best_len[256];

  263.         double p= i/256.0;

  264. 

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

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

  267. 

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

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

  270.             double len=0;

  271.             occ[j]=1.0;

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

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

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

  275.                     if(occ[m]){

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

  277.                                       + (1-p)*l2tab[256-m]);

  278.                     }

  279.                 }

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

  281.                     best_len[k]= len;

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

  283.                 }

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

  285.                     if(occ[m]){

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

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

  288.                     }

  289.                 }

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

  291.             }

  292.         }

  293.     }

  294. }

  295. 

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

  297.     int i;

  298. 

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

  300. do{\

  301.     if(rc_stat){\

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

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

  304.     }\

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

  306. }while(0)

  307. 

  308.     if(v){

  309.         const int a= FFABS(v);

  310.         const int e= av_log2(a);

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

  312.         if(e<=9){

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

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

  315.             }

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

  317. 

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

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

  320.             }

  321. 

  322.             if(is_signed)

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

  324.         }else{

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

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

  327.             }

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

  329. 

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

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

  332.             }

  333. 

  334.             if(is_signed)

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

  336.         }

  337.     }else{

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

  339.     }

  340. #undef put_rac

  341. }

  342. 

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

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

  345. }

  346. 

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

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

  349.         return 0;

  350.     else{

  351.         int i, e, a;

  352.         e= 0;

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

  354.             e++;

  355.         }

  356. 

  357.         a= 1;

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

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

  360.         }

  361. 

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

  363.         return (a^e)-e;

  364.     }

  365. }

  366. 

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

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

  369. }

  370. 

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

  372.     int drift= state->drift;

  373.     int count= state->count;

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

  375.     drift += v;

  376. 

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

  378.         count >>= 1;

  379.         drift >>= 1;

  380.         state->error_sum >>= 1;

  381.     }

  382.     count++;

  383. 

  384.     if(drift <= -count){

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

  386. 

  387.         drift += count;

  388.         if(drift <= -count)

  389.             drift= -count + 1;

  390.     }else if(drift > 0){

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

  392. 

  393.         drift -= count;

  394.         if(drift > 0)

  395.             drift= 0;

  396.     }

  397. 

  398.     state->drift= drift;

  399.     state->count= count;

  400. }

  401. 

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

  403.     int i, k, code;

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

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

  406. 

  407.     i= state->count;

  408.     k=0;

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

  410.         k++;

  411.         i += i;

  412.     }

  413. 

  414.     assert(k<=8);

  415. 

  416. #if 0 // JPEG LS

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

  418.     else                                         code= v;

  419. #else

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

  421. #endif

  422. 

  423. //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);

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

  425. 

  426.     update_vlc_state(state, v);

  427. }

  428. 

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

  430.     int k, i, v, ret;

  431. 

  432.     i= state->count;

  433.     k=0;

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

  435.         k++;

  436.         i += i;

  437.     }

  438. 

  439.     assert(k<=8);

  440. 

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

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

  443. 

  444. #if 0 // JPEG LS

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

  446. #else

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

  448. #endif

  449. 

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

  451. 

  452.     update_vlc_state(state, v);

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

  454.     return ret;

  455. }

  456. 

  457. #if CONFIG_FFV1_ENCODER

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

  459.                                         int16_t *sample[3],

  460.                                         int plane_index, int bits)

  461. {

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

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

  464.     int x;

  465.     int run_index= s->run_index;

  466.     int run_count=0;

  467.     int run_mode=0;

  468. 

  469.     if(s->ac){

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

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

  472.             return -1;

  473.         }

  474.     }else{

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

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

  477.             return -1;

  478.         }

  479.     }

  480. 

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

  482.         int diff, context;

  483. 

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

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

  486. 

  487.         if(context < 0){

  488.             context = -context;

  489.             diff= -diff;

  490.         }

  491. 

  492.         diff= fold(diff, bits);

  493. 

  494.         if(s->ac){

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

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

  497.             }else{

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

  499.             }

  500.         }else{

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

  502. 

  503.             if(run_mode){

  504. 

  505.                 if(diff){

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

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

  508.                         run_index++;

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

  510.                     }

  511. 

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

  513.                     if(run_index) run_index--;

  514.                     run_count=0;

  515.                     run_mode=0;

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

  517.                 }else{

  518.                     run_count++;

  519.                 }

  520.             }

  521. 

  522. //            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));

  523. 

  524.             if(run_mode == 0)

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

  526.         }

  527.     }

  528.     if(run_mode){

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

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

  531.             run_index++;

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

  533.         }

  534. 

  535.         if(run_count)

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

  537.     }

  538.     s->run_index= run_index;

  539. 

  540.     return 0;

  541. }

  542. 

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

  544.     int x,y,i;

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

  546.     int16_t *sample[3];

  547.     s->run_index=0;

  548. 

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

  550. 

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

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

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

  554. 

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

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

  557. //{START_TIMER

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

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

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

  561.             }

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

  563.         }else{

  564.             if(s->packed_at_lsb){

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

  566.                     sample[0][x]= ((uint16_t*)(src + stride*y))[x];

  567.                 }

  568.             }else{

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

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

  571.                 }

  572.             }

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

  574.         }

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

  576.     }

  577. }

  578. 

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

  580.     int x, y, p, i;

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

  582.     int16_t *sample[4][3];

  583.     s->run_index=0;

  584. 

  585.     memset(s->sample_buffer, 0, ring_size*4*(w+6)*sizeof(*s->sample_buffer));

  586. 

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

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

  589.             for(p=0; p<4; p++)

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

  591. 

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

  593.             unsigned v= src[x + stride*y];

  594.             int b= v&0xFF;

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

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

  597.             int a=  v>>24;

  598. 

  599.             b -= g;

  600.             r -= g;

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

  602.             b += 0x100;

  603.             r += 0x100;

  604. 

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

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

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

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

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

  610.             sample[3][0][x]= a;

  611.         }

  612.         for(p=0; p<3 + s->transparency; p++){

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

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

  615.             encode_line(s, w, sample[p], (p+1)/2, 9);

  616.         }

  617.     }

  618. }

  619. 

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

  621.     int last=0;

  622.     int i;

  623.     uint8_t state[CONTEXT_SIZE];

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

  625. 

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

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

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

  629.             last= i;

  630.         }

  631.     }

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

  633. }

  634. 

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

  636.     int i;

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

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

  639. }

  640. 

  641. static void write_header(FFV1Context *f){

  642.     uint8_t state[CONTEXT_SIZE];

  643.     int i, j;

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

  645. 

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

  647. 

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

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

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

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

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

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

  654.             }

  655.         }

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

  657.         if(f->version>0)

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

  659.         put_rac(c, state, f->chroma_planes);

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

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

  662.         put_rac(c, state, f->transparency);

  663. 

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

  665.     }else if(f->version < 3){

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

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

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

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

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

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

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

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

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

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

  676.             }

  677.         }

  678.     }

  679. }

  680. #endif /* CONFIG_FFV1_ENCODER */

  681. 

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

  683.     FFV1Context *s = avctx->priv_data;

  684. 

  685.     s->avctx= avctx;

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

  687. 

  688.     avcodec_get_frame_defaults(&s->picture);

  689. 

  690.     ff_dsputil_init(&s->dsp, avctx);

  691. 

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

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

  694. 

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

  696.     //defaults

  697.     s->num_h_slices=1;

  698.     s->num_v_slices=1;

  699. 

  700. 

  701.     return 0;

  702. }

  703. 

  704. static int init_slice_state(FFV1Context *f, FFV1Context *fs){

  705.     int j;

  706. 

  707.         fs->plane_count= f->plane_count;

  708.         fs->transparency= f->transparency;

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

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

  711. 

  712.             if(fs->ac){

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

  714.                 if(!p->    state)

  715.                     return AVERROR(ENOMEM);

  716.             }else{

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

  718.                 if(!p->vlc_state)

  719.                     return AVERROR(ENOMEM);

  720.             }

  721.         }

  722. 

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

  724.             //FIXME only redo if state_transition changed

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

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

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

  728.             }

  729.         }

  730. 

  731.     return 0;

  732. }

  733. 

  734. static int init_slices_state(FFV1Context *f){

  735.     int i;

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

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

  738.         if(init_slice_state(f, fs) < 0)

  739.             return -1;

  740.     }

  741.     return 0;

  742. }

  743. 

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

  745.     int i;

  746. 

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

  748. 

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

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

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

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

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

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

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

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

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

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

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

  760. 

  761.         fs->slice_width = sxe - sxs;

  762.         fs->slice_height= sye - sys;

  763.         fs->slice_x     = sxs;

  764.         fs->slice_y     = sys;

  765. 

  766.         fs->sample_buffer = av_malloc(3*4 * (fs->width+6) * sizeof(*fs->sample_buffer));

  767.         if (!fs->sample_buffer)

  768.             return AVERROR(ENOMEM);

  769.     }

  770.     return 0;

  771. }

  772. 

  773. static int allocate_initial_states(FFV1Context *f){

  774.     int i;

  775. 

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

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

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

  779.             return AVERROR(ENOMEM);

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

  781.     }

  782.     return 0;

  783. }

  784. 

  785. #if CONFIG_FFV1_ENCODER

  786. static int write_extra_header(FFV1Context *f){

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

  788.     uint8_t state[CONTEXT_SIZE];

  789.     int i, j, k;

  790.     uint8_t state2[32][CONTEXT_SIZE];

  791.     unsigned v;

  792. 

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

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

  795. 

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

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

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

  799. 

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

  801.     if(f->version > 2)

  802.         put_symbol(c, state, f->minor_version, 0);

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

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

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

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

  807.         }

  808.     }

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

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

  811.     put_rac(c, state, f->chroma_planes);

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

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

  814.     put_rac(c, state, f->transparency);

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

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

  817. 

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

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

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

  821. 

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

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

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

  825.                 break;

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

  827.             put_rac(c, state, 1);

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

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

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

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

  832.                 }

  833.             }

  834.         }else{

  835.             put_rac(c, state, 0);

  836.         }

  837.     }

  838. 

  839.     if(f->version > 2){

  840.         put_symbol(c, state, f->ec, 0);

  841.     }

  842. 

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

  844.     v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, f->avctx->extradata, f->avctx->extradata_size);

  845.     AV_WL32(f->avctx->extradata + f->avctx->extradata_size, v);

  846.     f->avctx->extradata_size += 4;

  847. 

  848.     return 0;

  849. }

  850. 

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

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

  853. 

  854.     do{

  855.         changed=0;

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

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

  858. #define COST(old, new) \

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

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

  861. 

  862. #define COST2(old, new) \

  863.     COST(old, new)\

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

  865. 

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

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

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

  869.                     int j;

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

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

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

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

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

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

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

  877.                     }

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

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

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

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

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

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

  884.                         }

  885.                     }

  886.                     print=changed=1;

  887.                 }

  888.             }

  889.         }

  890.     }while(changed);

  891.     return print;

  892. }

  893. 

  894. static av_cold int encode_init(AVCodecContext *avctx)

  895. {

  896.     FFV1Context *s = avctx->priv_data;

  897.     int i, j, k, m;

  898. 

  899.     common_init(avctx);

  900. 

  901.     s->version=0;

  902. 

  903.     if((avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)) || avctx->slices>1)

  904.         s->version = FFMAX(s->version, 2);

  905. 

  906.     if(avctx->level == 3){

  907.         s->version = 3;

  908.     }

  909. 

  910.     if(s->ec < 0){

  911.         s->ec = (s->version >= 3);

  912.     }

  913. 

  914.     if(s->version >= 2 && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {

  915.         av_log(avctx, AV_LOG_ERROR, "Version 2 needed for requested features but version 2 is experimental and not enabled\n");

  916.         return AVERROR_INVALIDDATA;

  917.     }

  918. 

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

  920. 

  921.     s->plane_count=3;

  922.     switch(avctx->pix_fmt){

  923.     case PIX_FMT_YUV444P9:

  924.     case PIX_FMT_YUV422P9:

  925.     case PIX_FMT_YUV420P9:

  926.         if (!avctx->bits_per_raw_sample)

  927.             s->bits_per_raw_sample = 9;

  928.     case PIX_FMT_YUV444P10:

  929.     case PIX_FMT_YUV420P10:

  930.     case PIX_FMT_YUV422P10:

  931.         s->packed_at_lsb = 1;

  932.         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)

  933.             s->bits_per_raw_sample = 10;

  934.     case PIX_FMT_GRAY16:

  935.     case PIX_FMT_YUV444P16:

  936.     case PIX_FMT_YUV422P16:

  937.     case PIX_FMT_YUV420P16:

  938.         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample) {

  939.             s->bits_per_raw_sample = 16;

  940.         } else if (!s->bits_per_raw_sample){

  941.             s->bits_per_raw_sample = avctx->bits_per_raw_sample;

  942.         }

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

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

  945.             return AVERROR_INVALIDDATA;

  946.         }

  947.         if(!s->ac && avctx->coder_type == -1) {

  948.             av_log(avctx, AV_LOG_INFO, "bits_per_raw_sample > 8, forcing coder 1\n");

  949.             s->ac = 2;

  950.         }

  951.         if(!s->ac){

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

  953.             return AVERROR_INVALIDDATA;

  954.         }

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

  956.     case PIX_FMT_GRAY8:

  957.     case PIX_FMT_YUV444P:

  958.     case PIX_FMT_YUV440P:

  959.     case PIX_FMT_YUV422P:

  960.     case PIX_FMT_YUV420P:

  961.     case PIX_FMT_YUV411P:

  962.     case PIX_FMT_YUV410P:

  963.         s->chroma_planes= av_pix_fmt_descriptors[avctx->pix_fmt].nb_components < 3 ? 0 : 1;

  964.         s->colorspace= 0;

  965.         break;

  966.     case PIX_FMT_YUVA444P:

  967.     case PIX_FMT_YUVA422P:

  968.     case PIX_FMT_YUVA420P:

  969.         s->chroma_planes= 1;

  970.         s->colorspace= 0;

  971.         s->transparency= 1;

  972.         break;

  973.     case PIX_FMT_RGB32:

  974.         s->colorspace= 1;

  975.         s->transparency= 1;

  976.         break;

  977.     case PIX_FMT_0RGB32:

  978.         s->colorspace= 1;

  979.         break;

  980.     default:

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

  982.         return AVERROR_INVALIDDATA;

  983.     }

  984.     if (s->transparency) {

  985.         av_log(avctx, AV_LOG_WARNING, "Storing alpha plane, this will require a recent FFV1 decoder to playback!\n");

  986.     }

  987.     if (avctx->context_model > 1U) {

  988.         av_log(avctx, AV_LOG_ERROR, "Invalid context model %d, valid values are 0 and 1\n", avctx->context_model);

  989.         return AVERROR(EINVAL);

  990.     }

  991. 

  992.     if(s->ac>1)

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

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

  995. 

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

  997.         s->quant_table_count=2;

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

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

  1000.             s->quant_tables[0][1][i]=        11*quant11[i];

  1001.             s->quant_tables[0][2][i]=     11*11*quant11[i];

  1002.             s->quant_tables[1][0][i]=           quant11[i];

  1003.             s->quant_tables[1][1][i]=        11*quant11[i];

  1004.             s->quant_tables[1][2][i]=     11*11*quant5 [i];

  1005.             s->quant_tables[1][3][i]=   5*11*11*quant5 [i];

  1006.             s->quant_tables[1][4][i]= 5*5*11*11*quant5 [i];

  1007.         }else{

  1008.             s->quant_tables[0][0][i]=           quant9_10bit[i];

  1009.             s->quant_tables[0][1][i]=        11*quant9_10bit[i];

  1010.             s->quant_tables[0][2][i]=     11*11*quant9_10bit[i];

  1011.             s->quant_tables[1][0][i]=           quant9_10bit[i];

  1012.             s->quant_tables[1][1][i]=        11*quant9_10bit[i];

  1013.             s->quant_tables[1][2][i]=     11*11*quant5_10bit[i];

  1014.             s->quant_tables[1][3][i]=   5*11*11*quant5_10bit[i];

  1015.             s->quant_tables[1][4][i]= 5*5*11*11*quant5_10bit[i];

  1016.         }

  1017.     }

  1018.     s->context_count[0]= (11*11*11+1)/2;

  1019.     s->context_count[1]= (11*11*5*5*5+1)/2;

  1020.     memcpy(s->quant_table, s->quant_tables[avctx->context_model], sizeof(s->quant_table));

  1021. 

  1022.     for(i=0; i<s->plane_count; i++){

  1023.         PlaneContext * const p= &s->plane[i];

  1024. 

  1025.         memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));

  1026.         p->quant_table_index= avctx->context_model;

  1027.         p->context_count= s->context_count[p->quant_table_index];

  1028.     }

  1029. 

  1030.     if(allocate_initial_states(s) < 0)

  1031.         return AVERROR(ENOMEM);

  1032. 

  1033.     avctx->coded_frame= &s->picture;

  1034.     if(!s->transparency)

  1035.         s->plane_count= 2;

  1036.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  1037. 

  1038.     s->picture_number=0;

  1039. 

  1040.     if(avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  1041.         for(i=0; i<s->quant_table_count; i++){

  1042.             s->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*s->rc_stat2[i]));

  1043.             if(!s->rc_stat2[i])

  1044.                 return AVERROR(ENOMEM);

  1045.         }

  1046.     }

  1047.     if(avctx->stats_in){

  1048.         char *p= avctx->stats_in;

  1049.         uint8_t best_state[256][256];

  1050.         int gob_count=0;

  1051.         char *next;

  1052. 

  1053.         av_assert0(s->version>=2);

  1054. 

  1055.         for(;;){

  1056.             for(j=0; j<256; j++){

  1057.                 for(i=0; i<2; i++){

  1058.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1059.                     if(next==p){

  1060.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1061.                         return -1;

  1062.                     }

  1063.                     p=next;

  1064.                 }

  1065.             }

  1066.             for(i=0; i<s->quant_table_count; i++){

  1067.                 for(j=0; j<s->context_count[i]; j++){

  1068.                     for(k=0; k<32; k++){

  1069.                         for(m=0; m<2; m++){

  1070.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1071.                             if(next==p){

  1072.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1073.                                 return AVERROR_INVALIDDATA;

  1074.                             }

  1075.                             p=next;

  1076.                         }

  1077.                     }

  1078.                 }

  1079.             }

  1080.             gob_count= strtol(p, &next, 0);

  1081.             if(next==p || gob_count <0){

  1082.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1083.                 return AVERROR_INVALIDDATA;

  1084.             }

  1085.             p=next;

  1086.             while(*p=='\n' || *p==' ') p++;

  1087.             if(p[0]==0) break;

  1088.         }

  1089.         sort_stt(s, s->state_transition);

  1090. 

  1091.         find_best_state(best_state, s->state_transition);

  1092. 

  1093.         for(i=0; i<s->quant_table_count; i++){

  1094.             for(j=0; j<s->context_count[i]; j++){

  1095.                 for(k=0; k<32; k++){

  1096.                     double p= 128;

  1097.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1098.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1099.                     }

  1100.                     s->initial_states[i][j][k]= best_state[av_clip(round(p), 1, 255)][av_clip((s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1])/gob_count, 0, 255)];

  1101.                 }

  1102.             }

  1103.         }

  1104.     }

  1105. 

  1106.     if(s->version>1){

  1107.         for(s->num_v_slices=2; s->num_v_slices<9; s->num_v_slices++){

  1108.             for(s->num_h_slices=s->num_v_slices; s->num_h_slices<2*s->num_v_slices; s->num_h_slices++){

  1109.                 if(avctx->slices == s->num_h_slices * s->num_v_slices && avctx->slices <= 64)

  1110.                     goto slices_ok;

  1111.             }

  1112.         }

  1113.         av_log(avctx, AV_LOG_ERROR, "Unsupported number %d of slices requested, please specify a supported number with -slices (ex:4,6,9,12,16, ...)\n", avctx->slices);

  1114.         return -1;

  1115.         slices_ok:

  1116.         write_extra_header(s);

  1117.     }

  1118. 

  1119.     if(init_slice_contexts(s) < 0)

  1120.         return -1;

  1121.     if(init_slices_state(s) < 0)

  1122.         return -1;

  1123. 

  1124. #define STATS_OUT_SIZE 1024*1024*6

  1125.     if(avctx->flags & CODEC_FLAG_PASS1){

  1126.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1127.         for(i=0; i<s->quant_table_count; i++){

  1128.             for(j=0; j<s->slice_count; j++){

  1129.                 FFV1Context *sf= s->slice_context[j];

  1130.                 av_assert0(!sf->rc_stat2[i]);

  1131.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1132.                 if(!sf->rc_stat2[i])

  1133.                     return AVERROR(ENOMEM);

  1134.             }

  1135.         }

  1136.     }

  1137. 

  1138.     return 0;

  1139. }

  1140. #endif /* CONFIG_FFV1_ENCODER */

  1141. 

  1142. 

  1143. static void clear_slice_state(FFV1Context *f, FFV1Context *fs){

  1144.     int i, j;

  1145. 

  1146.         for(i=0; i<f->plane_count; i++){

  1147.             PlaneContext *p= &fs->plane[i];

  1148. 

  1149.             p->interlace_bit_state[0]= 128;

  1150.             p->interlace_bit_state[1]= 128;

  1151. 

  1152.             if(fs->ac){

  1153.                 if(f->initial_states[p->quant_table_index]){

  1154.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1155.                 }else

  1156.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1157.             }else{

  1158.                 for(j=0; j<p->context_count; j++){

  1159.                     p->vlc_state[j].drift= 0;

  1160.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1161.                     p->vlc_state[j].bias= 0;

  1162.                     p->vlc_state[j].count= 1;

  1163.                 }

  1164.             }

  1165.         }

  1166. }

  1167. 

  1168. #if CONFIG_FFV1_ENCODER

  1169. 

  1170. static void encode_slice_header(FFV1Context *f, FFV1Context *fs){

  1171.     RangeCoder *c = &fs->c;

  1172.     uint8_t state[CONTEXT_SIZE];

  1173.     int j;

  1174.     memset(state, 128, sizeof(state));

  1175. 

  1176.     put_symbol(c, state, (fs->slice_x     +1)*f->num_h_slices / f->width   , 0);

  1177.     put_symbol(c, state, (fs->slice_y     +1)*f->num_v_slices / f->height  , 0);

  1178.     put_symbol(c, state, (fs->slice_width +1)*f->num_h_slices / f->width -1, 0);

  1179.     put_symbol(c, state, (fs->slice_height+1)*f->num_v_slices / f->height-1, 0);

  1180.     for(j=0; j<f->plane_count; j++){

  1181.         put_symbol(c, state, f->plane[j].quant_table_index, 0);

  1182.         av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);

  1183.     }

  1184.     if(!f->picture.interlaced_frame) put_symbol(c, state, 3, 0);

  1185.     else                             put_symbol(c, state, 1 + !f->picture.top_field_first, 0);

  1186.     put_symbol(c, state, f->picture.sample_aspect_ratio.num, 0);

  1187.     put_symbol(c, state, f->picture.sample_aspect_ratio.den, 0);

  1188. }

  1189. 

  1190. static int encode_slice(AVCodecContext *c, void *arg){

  1191.     FFV1Context *fs= *(void**)arg;

  1192.     FFV1Context *f= fs->avctx->priv_data;

  1193.     int width = fs->slice_width;

  1194.     int height= fs->slice_height;

  1195.     int x= fs->slice_x;

  1196.     int y= fs->slice_y;

  1197.     AVFrame * const p= &f->picture;

  1198.     const int ps= (f->bits_per_raw_sample>8)+1;

  1199. 

  1200.     if(p->key_frame)

  1201.         clear_slice_state(f, fs);

  1202.     if(f->version > 2){

  1203.         encode_slice_header(f, fs);

  1204.     }

  1205.     if(!fs->ac){

  1206.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? ff_rac_terminate(&fs->c) : 0;

  1207.         init_put_bits(&fs->pb, fs->c.bytestream_start + fs->ac_byte_count, fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  1208.     }

  1209. 

  1210.     if(f->colorspace==0){

  1211.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1212.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1213.         const int cx= x>>f->chroma_h_shift;

  1214.         const int cy= y>>f->chroma_v_shift;

  1215. 

  1216.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1217. 

  1218.         if (f->chroma_planes){

  1219.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1220.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1221.         }

  1222.         if (fs->transparency)

  1223.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1224.     }else{

  1225.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1226.     }

  1227.     emms_c();

  1228. 

  1229.     return 0;

  1230. }

  1231. 

  1232. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1233.                         const AVFrame *pict, int *got_packet)

  1234. {

  1235.     FFV1Context *f = avctx->priv_data;

  1236.     RangeCoder * const c= &f->slice_context[0]->c;

  1237.     AVFrame * const p= &f->picture;

  1238.     int used_count= 0;

  1239.     uint8_t keystate=128;

  1240.     uint8_t *buf_p;

  1241.     int i, ret;

  1242. 

  1243.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1244.                                   + FF_MIN_BUFFER_SIZE)) < 0)

  1245.         return ret;

  1246. 

  1247.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1248.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1249. 

  1250.     *p = *pict;

  1251.     p->pict_type= AV_PICTURE_TYPE_I;

  1252. 

  1253.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1254.         put_rac(c, &keystate, 1);

  1255.         p->key_frame= 1;

  1256.         f->gob_count++;

  1257.         write_header(f);

  1258.     }else{

  1259.         put_rac(c, &keystate, 0);

  1260.         p->key_frame= 0;

  1261.     }

  1262. 

  1263.     if (f->ac>1){

  1264.         int i;

  1265.         for(i=1; i<256; i++){

  1266.             c->one_state[i]= f->state_transition[i];

  1267.             c->zero_state[256-i]= 256-c->one_state[i];

  1268.         }

  1269.     }

  1270. 

  1271.     for(i=1; i<f->slice_count; i++){

  1272.         FFV1Context *fs= f->slice_context[i];

  1273.         uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;

  1274.         int len = pkt->size/f->slice_count;

  1275. 

  1276.         ff_init_range_encoder(&fs->c, start, len);

  1277.     }

  1278.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1279. 

  1280.     buf_p = pkt->data;

  1281.     for(i=0; i<f->slice_count; i++){

  1282.         FFV1Context *fs= f->slice_context[i];

  1283.         int bytes;

  1284. 

  1285.         if(fs->ac){

  1286.             uint8_t state=128;

  1287.             put_rac(&fs->c, &state, 0);

  1288.             bytes= ff_rac_terminate(&fs->c);

  1289.         }else{

  1290.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1291.             bytes= fs->ac_byte_count + (put_bits_count(&fs->pb)+7)/8;

  1292.         }

  1293.         if(i>0 || f->version>2){

  1294.             av_assert0(bytes < pkt->size/f->slice_count);

  1295.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1296.             av_assert0(bytes < (1<<24));

  1297.             AV_WB24(buf_p+bytes, bytes);

  1298.             bytes+=3;

  1299.         }

  1300.         if(f->ec){

  1301.             unsigned v;

  1302.             buf_p[bytes++] = 0;

  1303.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1304.             AV_WL32(buf_p + bytes, v); bytes += 4;

  1305.         }

  1306.         buf_p += bytes;

  1307.     }

  1308. 

  1309.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1310.         int j, k, m;

  1311.         char *p= avctx->stats_out;

  1312.         char *end= p + STATS_OUT_SIZE;

  1313. 

  1314.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1315.         for(i=0; i<f->quant_table_count; i++)

  1316.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1317. 

  1318.         for(j=0; j<f->slice_count; j++){

  1319.             FFV1Context *fs= f->slice_context[j];

  1320.             for(i=0; i<256; i++){

  1321.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1322.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1323.             }

  1324.             for(i=0; i<f->quant_table_count; i++){

  1325.                 for(k=0; k<f->context_count[i]; k++){

  1326.                     for(m=0; m<32; m++){

  1327.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1328.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1329.                     }

  1330.                 }

  1331.             }

  1332.         }

  1333. 

  1334.         for(j=0; j<256; j++){

  1335.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1336.             p+= strlen(p);

  1337.         }

  1338.         snprintf(p, end-p, "\n");

  1339. 

  1340.         for(i=0; i<f->quant_table_count; i++){

  1341.             for(j=0; j<f->context_count[i]; j++){

  1342.                 for(m=0; m<32; m++){

  1343.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1344.                     p+= strlen(p);

  1345.                 }

  1346.             }

  1347.         }

  1348.         snprintf(p, end-p, "%d\n", f->gob_count);

  1349.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1350.         avctx->stats_out[0] = '\0';

  1351. 

  1352.     f->picture_number++;

  1353.     pkt->size   = buf_p - pkt->data;

  1354.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1355.     *got_packet = 1;

  1356. 

  1357.     return 0;

  1358. }

  1359. #endif /* CONFIG_FFV1_ENCODER */

  1360. 

  1361. static av_cold int common_end(AVCodecContext *avctx){

  1362.     FFV1Context *s = avctx->priv_data;

  1363.     int i, j;

  1364. 

  1365.     if (avctx->codec->decode && s->picture.data[0])

  1366.         avctx->release_buffer(avctx, &s->picture);

  1367. 

  1368.     for(j=0; j<s->slice_count; j++){

  1369.         FFV1Context *fs= s->slice_context[j];

  1370.         for(i=0; i<s->plane_count; i++){

  1371.             PlaneContext *p= &fs->plane[i];

  1372. 

  1373.             av_freep(&p->state);

  1374.             av_freep(&p->vlc_state);

  1375.         }

  1376.         av_freep(&fs->sample_buffer);

  1377.     }

  1378. 

  1379.     av_freep(&avctx->stats_out);

  1380.     for(j=0; j<s->quant_table_count; j++){

  1381.         av_freep(&s->initial_states[j]);

  1382.         for(i=0; i<s->slice_count; i++){

  1383.             FFV1Context *sf= s->slice_context[i];

  1384.             av_freep(&sf->rc_stat2[j]);

  1385.         }

  1386.         av_freep(&s->rc_stat2[j]);

  1387.     }

  1388. 

  1389.     for(i=0; i<s->slice_count; i++){

  1390.         av_freep(&s->slice_context[i]);

  1391.     }

  1392. 

  1393.     return 0;

  1394. }

  1395. 

  1396. static av_always_inline void decode_line(FFV1Context *s, int w,

  1397.                                          int16_t *sample[2],

  1398.                                          int plane_index, int bits)

  1399. {

  1400.     PlaneContext * const p= &s->plane[plane_index];

  1401.     RangeCoder * const c= &s->c;

  1402.     int x;

  1403.     int run_count=0;

  1404.     int run_mode=0;

  1405.     int run_index= s->run_index;

  1406. 

  1407.     for(x=0; x<w; x++){

  1408.         int diff, context, sign;

  1409. 

  1410.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1411.         if(context < 0){

  1412.             context= -context;

  1413.             sign=1;

  1414.         }else

  1415.             sign=0;

  1416. 

  1417.         av_assert2(context < p->context_count);

  1418. 

  1419.         if(s->ac){

  1420.             diff= get_symbol_inline(c, p->state[context], 1);

  1421.         }else{

  1422.             if(context == 0 && run_mode==0) run_mode=1;

  1423. 

  1424.             if(run_mode){

  1425.                 if(run_count==0 && run_mode==1){

  1426.                     if(get_bits1(&s->gb)){

  1427.                         run_count = 1<<ff_log2_run[run_index];

  1428.                         if(x + run_count <= w) run_index++;

  1429.                     }else{

  1430.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1431.                         else run_count=0;

  1432.                         if(run_index) run_index--;

  1433.                         run_mode=2;

  1434.                     }

  1435.                 }

  1436.                 run_count--;

  1437.                 if(run_count < 0){

  1438.                     run_mode=0;

  1439.                     run_count=0;

  1440.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1441.                     if(diff>=0) diff++;

  1442.                 }else

  1443.                     diff=0;

  1444.             }else

  1445.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1446. 

  1447. //            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));

  1448.         }

  1449. 

  1450.         if(sign) diff= -diff;

  1451. 

  1452.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1453.     }

  1454.     s->run_index= run_index;

  1455. }

  1456. 

  1457. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1458.     int x, y;

  1459.     int16_t *sample[2];

  1460.     sample[0]=s->sample_buffer    +3;

  1461.     sample[1]=s->sample_buffer+w+6+3;

  1462. 

  1463.     s->run_index=0;

  1464. 

  1465.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1466. 

  1467.     for(y=0; y<h; y++){

  1468.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1469. 

  1470.         sample[0]= sample[1];

  1471.         sample[1]= temp;

  1472. 

  1473.         sample[1][-1]= sample[0][0  ];

  1474.         sample[0][ w]= sample[0][w-1];

  1475. 

  1476. //{START_TIMER

  1477.         if(s->avctx->bits_per_raw_sample <= 8){

  1478.             decode_line(s, w, sample, plane_index, 8);

  1479.             for(x=0; x<w; x++){

  1480.                 src[x + stride*y]= sample[1][x];

  1481.             }

  1482.         }else{

  1483.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1484.             if(s->packed_at_lsb){

  1485.                 for(x=0; x<w; x++){

  1486.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1487.                 }

  1488.             }else{

  1489.                 for(x=0; x<w; x++){

  1490.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1491.                 }

  1492.             }

  1493.         }

  1494. //STOP_TIMER("decode-line")}

  1495.     }

  1496. }

  1497. 

  1498. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1499.     int x, y, p;

  1500.     int16_t *sample[4][2];

  1501.     for(x=0; x<4; x++){

  1502.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1503.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1504.     }

  1505. 

  1506.     s->run_index=0;

  1507. 

  1508.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1509. 

  1510.     for(y=0; y<h; y++){

  1511.         for(p=0; p<3 + s->transparency; p++){

  1512.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1513. 

  1514.             sample[p][0]= sample[p][1];

  1515.             sample[p][1]= temp;

  1516. 

  1517.             sample[p][1][-1]= sample[p][0][0  ];

  1518.             sample[p][0][ w]= sample[p][0][w-1];

  1519.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1520.         }

  1521.         for(x=0; x<w; x++){

  1522.             int g= sample[0][1][x];

  1523.             int b= sample[1][1][x];

  1524.             int r= sample[2][1][x];

  1525.             int a= sample[3][1][x];

  1526. 

  1527. //            assert(g>=0 && b>=0 && r>=0);

  1528. //            assert(g<256 && b<512 && r<512);

  1529. 

  1530.             b -= 0x100;

  1531.             r -= 0x100;

  1532.             g -= (b + r)>>2;

  1533.             b += g;

  1534.             r += g;

  1535. 

  1536.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1537.         }

  1538.     }

  1539. }

  1540. 

  1541. static int decode_slice_header(FFV1Context *f, FFV1Context *fs){

  1542.     RangeCoder *c = &fs->c;

  1543.     uint8_t state[CONTEXT_SIZE];

  1544.     unsigned ps, i, context_count;

  1545.     memset(state, 128, sizeof(state));

  1546. 

  1547.     av_assert0(f->version > 2);

  1548. 

  1549.     fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1550.     fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1551.     fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1552.     fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1553. 

  1554.     fs->slice_x /= f->num_h_slices;

  1555.     fs->slice_y /= f->num_v_slices;

  1556.     fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1557.     fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1558.     if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1559.         return -1;

  1560.     if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1561.         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1562.         return -1;

  1563. 

  1564.     for(i=0; i<f->plane_count; i++){

  1565.         PlaneContext * const p= &fs->plane[i];

  1566.         int idx=get_symbol(c, state, 0);

  1567.         if(idx > (unsigned)f->quant_table_count){

  1568.             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1569.             return -1;

  1570.         }

  1571.         p->quant_table_index= idx;

  1572.         memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1573.         context_count= f->context_count[idx];

  1574. 

  1575.         if(p->context_count < context_count){

  1576.             av_freep(&p->state);

  1577.             av_freep(&p->vlc_state);

  1578.         }

  1579.         p->context_count= context_count;

  1580.     }

  1581. 

  1582.     ps = get_symbol(c, state, 0);

  1583.     if(ps==1){

  1584.         f->picture.interlaced_frame = 1;

  1585.         f->picture.top_field_first  = 1;

  1586.     } else if(ps==2){

  1587.         f->picture.interlaced_frame = 1;

  1588.         f->picture.top_field_first  = 0;

  1589.     } else if(ps==3){

  1590.         f->picture.interlaced_frame = 0;

  1591.     }

  1592.     f->picture.sample_aspect_ratio.num = get_symbol(c, state, 0);

  1593.     f->picture.sample_aspect_ratio.den = get_symbol(c, state, 0);

  1594. 

  1595.     return 0;

  1596. }

  1597. 

  1598. static int decode_slice(AVCodecContext *c, void *arg){

  1599.     FFV1Context *fs= *(void**)arg;

  1600.     FFV1Context *f= fs->avctx->priv_data;

  1601.     int width, height, x, y;

  1602.     const int ps= (c->bits_per_raw_sample>8)+1;

  1603.     AVFrame * const p= &f->picture;

  1604. 

  1605.     if(f->version > 2){

  1606.         if(init_slice_state(f, fs) < 0)

  1607.             return AVERROR(ENOMEM);

  1608.         if(decode_slice_header(f, fs) < 0)

  1609.             return AVERROR_INVALIDDATA;

  1610.     }

  1611.     if(init_slice_state(f, fs) < 0)

  1612.         return AVERROR(ENOMEM);

  1613.     if(f->picture.key_frame)

  1614.         clear_slice_state(f, fs);

  1615.     width = fs->slice_width;

  1616.     height= fs->slice_height;

  1617.     x= fs->slice_x;

  1618.     y= fs->slice_y;

  1619. 

  1620.     if(!fs->ac){

  1621.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;

  1622.         init_get_bits(&fs->gb,

  1623.                       fs->c.bytestream_start + fs->ac_byte_count,

  1624.                       (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);

  1625.     }

  1626. 

  1627.     av_assert1(width && height);

  1628.     if(f->colorspace==0){

  1629.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1630.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1631.         const int cx= x>>f->chroma_h_shift;

  1632.         const int cy= y>>f->chroma_v_shift;

  1633.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1634. 

  1635.         if (f->chroma_planes){

  1636.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1637.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1638.         }

  1639.         if (fs->transparency)

  1640.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1641.     }else{

  1642.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1643.     }

  1644. 

  1645.     emms_c();

  1646. 

  1647.     return 0;

  1648. }

  1649. 

  1650. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1651.     int v;

  1652.     int i=0;

  1653.     uint8_t state[CONTEXT_SIZE];

  1654. 

  1655.     memset(state, 128, sizeof(state));

  1656. 

  1657.     for(v=0; i<128 ; v++){

  1658.         unsigned len= get_symbol(c, state, 0) + 1;

  1659. 

  1660.         if(len > 128 - i) return -1;

  1661. 

  1662.         while(len--){

  1663.             quant_table[i] = scale*v;

  1664.             i++;

  1665. //printf("%2d ",v);

  1666. //if(i%16==0) printf("\n");

  1667.         }

  1668.     }

  1669. 

  1670.     for(i=1; i<128; i++){

  1671.         quant_table[256-i]= -quant_table[i];

  1672.     }

  1673.     quant_table[128]= -quant_table[127];

  1674. 

  1675.     return 2*v - 1;

  1676. }

  1677. 

  1678. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1679.     int i;

  1680.     int context_count=1;

  1681. 

  1682.     for(i=0; i<5; i++){

  1683.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1684.         if(context_count > 32768U){

  1685.             return -1;

  1686.         }

  1687.     }

  1688.     return (context_count+1)/2;

  1689. }

  1690. 

  1691. static int read_extra_header(FFV1Context *f){

  1692.     RangeCoder * const c= &f->c;

  1693.     uint8_t state[CONTEXT_SIZE];

  1694.     int i, j, k;

  1695.     uint8_t state2[32][CONTEXT_SIZE];

  1696. 

  1697.     memset(state2, 128, sizeof(state2));

  1698.     memset(state, 128, sizeof(state));

  1699. 

  1700.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1701.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1702. 

  1703.     f->version= get_symbol(c, state, 0);

  1704.     if(f->version > 2) {

  1705.         c->bytestream_end -= 4;

  1706.         f->minor_version= get_symbol(c, state, 0);

  1707.     }

  1708.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1709.     if(f->ac>1){

  1710.         for(i=1; i<256; i++){

  1711.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1712.         }

  1713.     }

  1714.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1715.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1716.     f->chroma_planes= get_rac(c, state);

  1717.     f->chroma_h_shift= get_symbol(c, state, 0);

  1718.     f->chroma_v_shift= get_symbol(c, state, 0);

  1719.     f->transparency= get_rac(c, state);

  1720.     f->plane_count= 2 + f->transparency;

  1721.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1722.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1723.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1724.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1725.         return -1;

  1726.     }

  1727. 

  1728.     f->quant_table_count= get_symbol(c, state, 0);

  1729.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1730.         return -1;

  1731.     for(i=0; i<f->quant_table_count; i++){

  1732.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1733.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1734.             return -1;

  1735.         }

  1736.     }

  1737. 

  1738.     if(allocate_initial_states(f) < 0)

  1739.         return AVERROR(ENOMEM);

  1740. 

  1741.     for(i=0; i<f->quant_table_count; i++){

  1742.         if(get_rac(c, state)){

  1743.             for(j=0; j<f->context_count[i]; j++){

  1744.                 for(k=0; k<CONTEXT_SIZE; k++){

  1745.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1746.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1747.                 }

  1748.             }

  1749.         }

  1750.     }

  1751. 

  1752.     if(f->version > 2){

  1753.         f->ec = get_symbol(c, state, 0);

  1754.     }

  1755. 

  1756.     if(f->version > 2){

  1757.         unsigned v;

  1758.         v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, f->avctx->extradata, f->avctx->extradata_size);

  1759.         if(v){

  1760.             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);

  1761.             return AVERROR_INVALIDDATA;

  1762.         }

  1763.     }

  1764. 

  1765.     return 0;

  1766. }

  1767. 

  1768. static int read_header(FFV1Context *f){

  1769.     uint8_t state[CONTEXT_SIZE];

  1770.     int i, j, context_count;

  1771.     RangeCoder * const c= &f->slice_context[0]->c;

  1772. 

  1773.     memset(state, 128, sizeof(state));

  1774. 

  1775.     if(f->version < 2){

  1776.         unsigned v= get_symbol(c, state, 0);

  1777.         if(v >= 2){

  1778.             av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);

  1779.             return AVERROR_INVALIDDATA;

  1780.         }

  1781.         f->version = v;

  1782.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1783.         if(f->ac>1){

  1784.             for(i=1; i<256; i++){

  1785.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1786.             }

  1787.         }

  1788.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1789.         if(f->version>0)

  1790.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1791.         f->chroma_planes= get_rac(c, state);

  1792.         f->chroma_h_shift= get_symbol(c, state, 0);

  1793.         f->chroma_v_shift= get_symbol(c, state, 0);

  1794.         f->transparency= get_rac(c, state);

  1795.         f->plane_count= 2 + f->transparency;

  1796.     }

  1797. 

  1798.     if(f->colorspace==0){

  1799.         if(!f->transparency && !f->chroma_planes){

  1800.             if (f->avctx->bits_per_raw_sample<=8)

  1801.                 f->avctx->pix_fmt= PIX_FMT_GRAY8;

  1802.             else

  1803.                 f->avctx->pix_fmt= PIX_FMT_GRAY16;

  1804.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1805.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1806.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1807.             case 0x01: f->avctx->pix_fmt= PIX_FMT_YUV440P; break;

  1808.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1809.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1810.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1811.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1812.             default:

  1813.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1814.                 return -1;

  1815.             }

  1816.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1817.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1818.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUVA444P; break;

  1819.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUVA422P; break;

  1820.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUVA420P; break;

  1821.             default:

  1822.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1823.                 return -1;

  1824.             }

  1825.         }else if(f->avctx->bits_per_raw_sample==9) {

  1826.             f->packed_at_lsb=1;

  1827.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1828.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P9; break;

  1829.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P9; break;

  1830.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9; break;

  1831.             default:

  1832.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1833.                 return -1;

  1834.             }

  1835.         }else if(f->avctx->bits_per_raw_sample==10) {

  1836.             f->packed_at_lsb=1;

  1837.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1838.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P10; break;

  1839.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; break;

  1840.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; break;

  1841.             default:

  1842.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1843.                 return -1;

  1844.             }

  1845.         }else {

  1846.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1847.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1848.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1849.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1850.             default:

  1851.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1852.                 return -1;

  1853.             }

  1854.         }

  1855.     }else if(f->colorspace==1){

  1856.         if(f->chroma_h_shift || f->chroma_v_shift){

  1857.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1858.             return -1;

  1859.         }

  1860.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1861.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1862.     }else{

  1863.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1864.         return -1;

  1865.     }

  1866. 

  1867. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1868.     if(f->version < 2){

  1869.         context_count= read_quant_tables(c, f->quant_table);

  1870.         if(context_count < 0){

  1871.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1872.                 return -1;

  1873.         }

  1874.     }else if(f->version < 3){

  1875.         f->slice_count= get_symbol(c, state, 0);

  1876.     }else{

  1877.         const uint8_t *p= c->bytestream_end;

  1878.         for(f->slice_count = 0; f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start; f->slice_count++){

  1879.             int trailer = 3 + 5*!!f->ec;

  1880.             int size = AV_RB24(p-trailer);

  1881.             if(size + trailer > p - c->bytestream_start)

  1882.                 break;

  1883.             p -= size + trailer;

  1884.         }

  1885.     }

  1886.     if(f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0){

  1887.         av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->slice_count);

  1888.         return -1;

  1889.     }

  1890. 

  1891.     for(j=0; j<f->slice_count; j++){

  1892.         FFV1Context *fs= f->slice_context[j];

  1893.         fs->ac= f->ac;

  1894.         fs->packed_at_lsb= f->packed_at_lsb;

  1895. 

  1896.         if(f->version == 2){

  1897.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1898.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1899.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1900.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1901. 

  1902.             fs->slice_x /= f->num_h_slices;

  1903.             fs->slice_y /= f->num_v_slices;

  1904.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1905.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1906.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1907.                 return -1;

  1908.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1909.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1910.                 return -1;

  1911.         }

  1912. 

  1913.         for(i=0; i<f->plane_count; i++){

  1914.             PlaneContext * const p= &fs->plane[i];

  1915. 

  1916.             if(f->version == 2){

  1917.                 int idx=get_symbol(c, state, 0);

  1918.                 if(idx > (unsigned)f->quant_table_count){

  1919.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1920.                     return -1;

  1921.                 }

  1922.                 p->quant_table_index= idx;

  1923.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1924.                 context_count= f->context_count[idx];

  1925.             }else{

  1926.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1927.             }

  1928. 

  1929.             if(f->version <= 2){

  1930.                 if(p->context_count < context_count){

  1931.                     av_freep(&p->state);

  1932.                     av_freep(&p->vlc_state);

  1933.                 }

  1934.                 p->context_count= context_count;

  1935.             }

  1936.         }

  1937.     }

  1938.     return 0;

  1939. }

  1940. 

  1941. static av_cold int decode_init(AVCodecContext *avctx)

  1942. {

  1943.     FFV1Context *f = avctx->priv_data;

  1944. 

  1945.     common_init(avctx);

  1946. 

  1947.     if(avctx->extradata && read_extra_header(f) < 0)

  1948.         return -1;

  1949. 

  1950.     if(init_slice_contexts(f) < 0)

  1951.         return -1;

  1952. 

  1953.     return 0;

  1954. }

  1955. 

  1956. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1957.     const uint8_t *buf = avpkt->data;

  1958.     int buf_size = avpkt->size;

  1959.     FFV1Context *f = avctx->priv_data;

  1960.     RangeCoder * const c= &f->slice_context[0]->c;

  1961.     AVFrame * const p= &f->picture;

  1962.     int i;

  1963.     uint8_t keystate= 128;

  1964.     const uint8_t *buf_p;

  1965. 

  1966.     AVFrame *picture = data;

  1967. 

  1968.     /* release previously stored data */

  1969.     if (p->data[0])

  1970.         avctx->release_buffer(avctx, p);

  1971. 

  1972.     ff_init_range_decoder(c, buf, buf_size);

  1973.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1974. 

  1975. 

  1976.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1977.     if(get_rac(c, &keystate)){

  1978.         p->key_frame= 1;

  1979.         f->key_frame_ok = 0;

  1980.         if(read_header(f) < 0)

  1981.             return -1;

  1982.         f->key_frame_ok = 1;

  1983.     }else{

  1984.         if (!f->key_frame_ok) {

  1985.             av_log(avctx, AV_LOG_ERROR, "Cant decode non keyframe without valid keyframe\n");

  1986.             return AVERROR_INVALIDDATA;

  1987.         }

  1988.         p->key_frame= 0;

  1989.     }

  1990. 

  1991.     p->reference= 0;

  1992.     if(avctx->get_buffer(avctx, p) < 0){

  1993.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1994.         return -1;

  1995.     }

  1996. 

  1997.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1998.         av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d\n",

  1999.                f->version, p->key_frame, f->ac, f->ec, f->slice_count);

  2000. 

  2001.     buf_p= buf + buf_size;

  2002.     for(i=f->slice_count-1; i>=0; i--){

  2003.         FFV1Context *fs= f->slice_context[i];

  2004.         int trailer = 3 + 5*!!f->ec;

  2005.         int v;

  2006. 

  2007.         if(i || f->version>2) v = AV_RB24(buf_p-trailer)+trailer;

  2008.         else                  v = buf_p - c->bytestream_start;

  2009.         if(buf_p - c->bytestream_start < v){

  2010.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  2011.             return -1;

  2012.         }

  2013.         buf_p -= v;

  2014. 

  2015.         if(f->ec){

  2016.             unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);

  2017.             if(crc){

  2018.                 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", crc);

  2019.             }

  2020.         }

  2021. 

  2022.         if(i){

  2023.             ff_init_range_decoder(&fs->c, buf_p, v);

  2024.         }

  2025.     }

  2026. 

  2027.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  2028.     f->picture_number++;

  2029. 

  2030.     *picture= *p;

  2031.     *data_size = sizeof(AVFrame);

  2032. 

  2033.     return buf_size;

  2034. }

  2035. 

  2036. AVCodec ff_ffv1_decoder = {

  2037.     .name           = "ffv1",

  2038.     .type           = AVMEDIA_TYPE_VIDEO,

  2039.     .id             = CODEC_ID_FFV1,

  2040.     .priv_data_size = sizeof(FFV1Context),

  2041.     .init           = decode_init,

  2042.     .close          = common_end,

  2043.     .decode         = decode_frame,

  2044.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |

  2045.                       CODEC_CAP_SLICE_THREADS,

  2046.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2047. };

  2048. 

  2049. #if CONFIG_FFV1_ENCODER

  2050. 

  2051. #define OFFSET(x) offsetof(FFV1Context, x)

  2052. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  2053. static const AVOption options[] = {

  2054.     { "slicecrc",        "Protect slices with CRCs",               OFFSET(ec),              AV_OPT_TYPE_INT, {-1}, -1, 1, VE},

  2055. {NULL}

  2056. };

  2057. 

  2058. static const AVClass class = {

  2059.     .class_name = "ffv1 encoder",

  2060.     .item_name  = av_default_item_name,

  2061.     .option     = options,

  2062.     .version    = LIBAVUTIL_VERSION_INT,

  2063. };

  2064. 

  2065. static const AVCodecDefault ffv1_defaults[] = {

  2066.     { "coder",                "-1" },

  2067.     { NULL },

  2068. };

  2069. 

  2070. AVCodec ff_ffv1_encoder = {

  2071.     .name           = "ffv1",

  2072.     .type           = AVMEDIA_TYPE_VIDEO,

  2073.     .id             = CODEC_ID_FFV1,

  2074.     .priv_data_size = sizeof(FFV1Context),

  2075.     .init           = encode_init,

  2076.     .encode2        = encode_frame,

  2077.     .close          = common_end,

  2078.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  2079.     .defaults       = ffv1_defaults,

  2080.     .pix_fmts       = (const enum PixelFormat[]){

  2081.         PIX_FMT_YUV420P, PIX_FMT_YUVA420P, PIX_FMT_YUVA422P, PIX_FMT_YUV444P,

  2082.         PIX_FMT_YUVA444P, PIX_FMT_YUV440P, PIX_FMT_YUV422P, PIX_FMT_YUV411P,

  2083.         PIX_FMT_YUV410P, PIX_FMT_0RGB32, PIX_FMT_RGB32, PIX_FMT_YUV420P16,

  2084.         PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV444P9, PIX_FMT_YUV422P9,

  2085.         PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_YUV444P10,

  2086.         PIX_FMT_GRAY16, PIX_FMT_GRAY8,

  2087.         PIX_FMT_NONE

  2088.     },

  2089.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2090.     .priv_class     = &class,

  2091. };

  2092. #endif