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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

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

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "get_bits.h"

  30. #include "put_bits.h"

  31. #include "dsputil.h"

  32. #include "rangecoder.h"

  33. #include "golomb.h"

  34. #include "mathops.h"

  35. #include "libavutil/avassert.h"

  36. 

  37. #define MAX_PLANES 4

  38. #define CONTEXT_SIZE 32

  39. 

  40. #define MAX_QUANT_TABLES 8

  41. #define MAX_CONTEXT_INPUTS 5

  42. 

  43. extern const uint8_t ff_log2_run[41];

  44. 

  45. static const int8_t quant5_10bit[256]={

  46.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  50.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  51.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  52.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  53.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  54. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  55. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  56. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  57. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  58. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

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

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

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

  62. };

  63. 

  64. static const int8_t quant5[256]={

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

  81. };

  82. 

  83. static const int8_t quant9_10bit[256]={

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

  85.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

  86.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  87.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

  88.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  89.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  90.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  91.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  92. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  93. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  94. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  95. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

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

  97. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  98. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  99. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  100. };

  101. 

  102. static const int8_t quant11[256]={

  103.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  106.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  107.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  108.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  109.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  110.  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

  111. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  112. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  113. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

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

  117. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  118. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  119. };

  120. 

  121. static const uint8_t ver2_state[256]= {

  122.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  123.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  124.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  125.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  126.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  127.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  128.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

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

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

  131.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  132.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  133.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  134.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  135.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  136.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  137.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  138. };

  139. 

  140. typedef struct VlcState{

  141.     int16_t drift;

  142.     uint16_t error_sum;

  143.     int8_t bias;

  144.     uint8_t count;

  145. } VlcState;

  146. 

  147. typedef struct PlaneContext{

  148.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  149.     int quant_table_index;

  150.     int context_count;

  151.     uint8_t (*state)[CONTEXT_SIZE];

  152.     VlcState *vlc_state;

  153.     uint8_t interlace_bit_state[2];

  154. } PlaneContext;

  155. 

  156. #define MAX_SLICES 256

  157. 

  158. typedef struct FFV1Context{

  159.     AVCodecContext *avctx;

  160.     RangeCoder c;

  161.     GetBitContext gb;

  162.     PutBitContext pb;

  163.     uint64_t rc_stat[256][2];

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

  165.     int version;

  166.     int width, height;

  167.     int chroma_h_shift, chroma_v_shift;

  168.     int chroma_planes;

  169.     int transparency;

  170.     int flags;

  171.     int picture_number;

  172.     AVFrame picture;

  173.     int plane_count;

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

  175.     PlaneContext plane[MAX_PLANES];

  176.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  178.     int context_count[MAX_QUANT_TABLES];

  179.     uint8_t state_transition[256];

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

  181.     int run_index;

  182.     int colorspace;

  183.     int16_t *sample_buffer;

  184.     int gob_count;

  185.     int packed_at_lsb;

  186. 

  187.     int quant_table_count;

  188. 

  189.     DSPContext dsp;

  190. 

  191.     struct FFV1Context *slice_context[MAX_SLICES];

  192.     int slice_count;

  193.     int num_v_slices;

  194.     int num_h_slices;

  195.     int slice_width;

  196.     int slice_height;

  197.     int slice_x;

  198.     int slice_y;

  199. }FFV1Context;

  200. 

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

  202.     if(bits==8)

  203.         diff= (int8_t)diff;

  204.     else{

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

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

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

  208.     }

  209. 

  210.     return diff;

  211. }

  212. 

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

  214. {

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

  216.     const int  T= last[ 0];

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

  218. 

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

  220. }

  221. 

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

  223.                               int16_t *last, int16_t *last2)

  224. {

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

  226.     const int  T= last[ 0];

  227.     const int RT= last[ 1];

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

  229. 

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

  231.         const int TT= last2[0];

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

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

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

  235.     }else

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

  237. }

  238. 

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

  240.     int i,j,k,m;

  241.     double l2tab[256];

  242. 

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

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

  245. 

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

  247.         double best_len[256];

  248.         double p= i/256.0;

  249. 

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

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

  252. 

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

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

  255.             double len=0;

  256.             occ[j]=1.0;

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

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

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

  260.                     if(occ[m]){

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

  262.                                       + (1-p)*l2tab[256-m]);

  263.                     }

  264.                 }

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

  266.                     best_len[k]= len;

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

  268.                 }

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

  270.                     if(occ[m]){

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

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

  273.                     }

  274.                 }

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

  276.             }

  277.         }

  278.     }

  279. }

  280. 

  281. 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]){

  282.     int i;

  283. 

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

  285. do{\

  286.     if(rc_stat){\

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

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

  289.     }\

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

  291. }while(0)

  292. 

  293.     if(v){

  294.         const int a= FFABS(v);

  295.         const int e= av_log2(a);

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

  297.         if(e<=9){

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

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

  300.             }

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

  302. 

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

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

  305.             }

  306. 

  307.             if(is_signed)

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

  309.         }else{

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

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

  312.             }

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

  314. 

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

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

  317.             }

  318. 

  319.             if(is_signed)

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

  321.         }

  322.     }else{

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

  324.     }

  325. #undef put_rac

  326. }

  327. 

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

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

  330. }

  331. 

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

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

  334.         return 0;

  335.     else{

  336.         int i, e, a;

  337.         e= 0;

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

  339.             e++;

  340.         }

  341. 

  342.         a= 1;

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

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

  345.         }

  346. 

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

  348.         return (a^e)-e;

  349.     }

  350. }

  351. 

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

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

  354. }

  355. 

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

  357.     int drift= state->drift;

  358.     int count= state->count;

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

  360.     drift += v;

  361. 

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

  363.         count >>= 1;

  364.         drift >>= 1;

  365.         state->error_sum >>= 1;

  366.     }

  367.     count++;

  368. 

  369.     if(drift <= -count){

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

  371. 

  372.         drift += count;

  373.         if(drift <= -count)

  374.             drift= -count + 1;

  375.     }else if(drift > 0){

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

  377. 

  378.         drift -= count;

  379.         if(drift > 0)

  380.             drift= 0;

  381.     }

  382. 

  383.     state->drift= drift;

  384.     state->count= count;

  385. }

  386. 

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

  388.     int i, k, code;

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

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

  391. 

  392.     i= state->count;

  393.     k=0;

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

  395.         k++;

  396.         i += i;

  397.     }

  398. 

  399.     assert(k<=8);

  400. 

  401. #if 0 // JPEG LS

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

  403.     else                                         code= v;

  404. #else

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

  406. #endif

  407. 

  408. //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);

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

  410. 

  411.     update_vlc_state(state, v);

  412. }

  413. 

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

  415.     int k, i, v, ret;

  416. 

  417.     i= state->count;

  418.     k=0;

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

  420.         k++;

  421.         i += i;

  422.     }

  423. 

  424.     assert(k<=8);

  425. 

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

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

  428. 

  429. #if 0 // JPEG LS

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

  431. #else

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

  433. #endif

  434. 

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

  436. 

  437.     update_vlc_state(state, v);

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

  439.     return ret;

  440. }

  441. 

  442. #if CONFIG_FFV1_ENCODER

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

  444.                                         int16_t *sample[2],

  445.                                         int plane_index, int bits)

  446. {

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

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

  449.     int x;

  450.     int run_index= s->run_index;

  451.     int run_count=0;

  452.     int run_mode=0;

  453. 

  454.     if(s->ac){

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

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

  457.             return -1;

  458.         }

  459.     }else{

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

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

  462.             return -1;

  463.         }

  464.     }

  465. 

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

  467.         int diff, context;

  468. 

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

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

  471. 

  472.         if(context < 0){

  473.             context = -context;

  474.             diff= -diff;

  475.         }

  476. 

  477.         diff= fold(diff, bits);

  478. 

  479.         if(s->ac){

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

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

  482.             }else{

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

  484.             }

  485.         }else{

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

  487. 

  488.             if(run_mode){

  489. 

  490.                 if(diff){

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

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

  493.                         run_index++;

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

  495.                     }

  496. 

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

  498.                     if(run_index) run_index--;

  499.                     run_count=0;

  500.                     run_mode=0;

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

  502.                 }else{

  503.                     run_count++;

  504.                 }

  505.             }

  506. 

  507. //            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));

  508. 

  509.             if(run_mode == 0)

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

  511.         }

  512.     }

  513.     if(run_mode){

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

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

  516.             run_index++;

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

  518.         }

  519. 

  520.         if(run_count)

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

  522.     }

  523.     s->run_index= run_index;

  524. 

  525.     return 0;

  526. }

  527. 

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

  529.     int x,y,i;

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

  531.     int16_t *sample[3];

  532.     s->run_index=0;

  533. 

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

  535. 

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

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

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

  539. 

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

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

  542. //{START_TIMER

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

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

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

  546.             }

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

  548.         }else{

  549.             if(s->packed_at_lsb){

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

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

  552.                 }

  553.             }else{

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

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

  556.                 }

  557.             }

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

  559.         }

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

  561.     }

  562. }

  563. 

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

  565.     int x, y, p, i;

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

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

  568.     s->run_index=0;

  569. 

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

  571. 

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

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

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

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

  576. 

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

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

  579.             int b= v&0xFF;

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

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

  582.             int a=  v>>24;

  583. 

  584.             b -= g;

  585.             r -= g;

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

  587.             b += 0x100;

  588.             r += 0x100;

  589. 

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

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

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

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

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

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

  596.         }

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

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

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

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

  601.         }

  602.     }

  603. }

  604. 

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

  606.     int last=0;

  607.     int i;

  608.     uint8_t state[CONTEXT_SIZE];

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

  610. 

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

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

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

  614.             last= i;

  615.         }

  616.     }

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

  618. }

  619. 

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

  621.     int i;

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

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

  624. }

  625. 

  626. static void write_header(FFV1Context *f){

  627.     uint8_t state[CONTEXT_SIZE];

  628.     int i, j;

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

  630. 

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

  632. 

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

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

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

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

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

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

  639.             }

  640.         }

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

  642.         if(f->version>0)

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

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

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

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

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

  648. 

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

  650.     }else{

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

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

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

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

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

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

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

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

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

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

  661.             }

  662.         }

  663.     }

  664. }

  665. #endif /* CONFIG_FFV1_ENCODER */

  666. 

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

  668.     FFV1Context *s = avctx->priv_data;

  669. 

  670.     s->avctx= avctx;

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

  672. 

  673.     avcodec_get_frame_defaults(&s->picture);

  674. 

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

  676. 

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

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

  679. 

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

  681.     //defaults

  682.     s->num_h_slices=1;

  683.     s->num_v_slices=1;

  684. 

  685. 

  686.     return 0;

  687. }

  688. 

  689. static int init_slice_state(FFV1Context *f){

  690.     int i, j;

  691. 

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

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

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

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

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

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

  698. 

  699.             if(fs->ac){

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

  701.                 if(!p->    state)

  702.                     return AVERROR(ENOMEM);

  703.             }else{

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

  705.                 if(!p->vlc_state)

  706.                     return AVERROR(ENOMEM);

  707.             }

  708.         }

  709. 

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

  711.             //FIXME only redo if state_transition changed

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

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

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

  715.             }

  716.         }

  717.     }

  718. 

  719.     return 0;

  720. }

  721. 

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

  723.     int i;

  724. 

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

  726. 

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

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

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

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

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

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

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

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

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

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

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

  738. 

  739.         fs->slice_width = sxe - sxs;

  740.         fs->slice_height= sye - sys;

  741.         fs->slice_x     = sxs;

  742.         fs->slice_y     = sys;

  743. 

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

  745.         if (!fs->sample_buffer)

  746.             return AVERROR(ENOMEM);

  747.     }

  748.     return 0;

  749. }

  750. 

  751. static int allocate_initial_states(FFV1Context *f){

  752.     int i;

  753. 

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

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

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

  757.             return AVERROR(ENOMEM);

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

  759.     }

  760.     return 0;

  761. }

  762. 

  763. #if CONFIG_FFV1_ENCODER

  764. static int write_extra_header(FFV1Context *f){

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

  766.     uint8_t state[CONTEXT_SIZE];

  767.     int i, j, k;

  768.     uint8_t state2[32][CONTEXT_SIZE];

  769. 

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

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

  772. 

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

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

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

  776. 

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

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

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

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

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

  782.         }

  783.     }

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

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

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

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

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

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

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

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

  792. 

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

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

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

  796. 

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

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

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

  800.                 break;

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

  802.             put_rac(c, state, 1);

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

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

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

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

  807.                 }

  808.             }

  809.         }else{

  810.             put_rac(c, state, 0);

  811.         }

  812.     }

  813. 

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

  815. 

  816.     return 0;

  817. }

  818. 

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

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

  821. 

  822.     do{

  823.         changed=0;

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

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

  826. #define COST(old, new) \

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

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

  829. 

  830. #define COST2(old, new) \

  831.     COST(old, new)\

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

  833. 

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

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

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

  837.                     int j;

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

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

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

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

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

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

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

  845.                     }

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

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

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

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

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

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

  852.                         }

  853.                     }

  854.                     print=changed=1;

  855.                 }

  856.             }

  857.         }

  858.     }while(changed);

  859.     return print;

  860. }

  861. 

  862. static av_cold int encode_init(AVCodecContext *avctx)

  863. {

  864.     FFV1Context *s = avctx->priv_data;

  865.     int i, j, k, m;

  866. 

  867.     common_init(avctx);

  868. 

  869.     s->version=0;

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

  871. 

  872.     if(s->ac>1)

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

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

  875. 

  876.     s->plane_count=3;

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

  878.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  888.         }else{

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

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

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

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

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

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

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

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

  897.         }

  898.     }

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

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

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

  902. 

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

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

  905. 

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

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

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

  909.     }

  910. 

  911.     if(allocate_initial_states(s) < 0)

  912.         return AVERROR(ENOMEM);

  913. 

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

  915.     switch(avctx->pix_fmt){

  916.     case PIX_FMT_YUV420P9:

  917.     case PIX_FMT_YUV420P10:

  918.     case PIX_FMT_YUV422P10:

  919.         s->packed_at_lsb = 1;

  920.     case PIX_FMT_GRAY16:

  921.     case PIX_FMT_YUV444P16:

  922.     case PIX_FMT_YUV422P16:

  923.     case PIX_FMT_YUV420P16:

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

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

  926.             return -1;

  927.         }

  928.         if(!s->ac){

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

  930.             return -1;

  931.         }

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

  933.     case PIX_FMT_YUV444P:

  934.     case PIX_FMT_YUV440P:

  935.     case PIX_FMT_YUV422P:

  936.     case PIX_FMT_YUV420P:

  937.     case PIX_FMT_YUV411P:

  938.     case PIX_FMT_YUV410P:

  939.         s->chroma_planes= avctx->pix_fmt == PIX_FMT_GRAY16 ? 0 : 1;

  940.         s->colorspace= 0;

  941.         break;

  942.     case PIX_FMT_YUVA444P:

  943.     case PIX_FMT_YUVA420P:

  944.         s->chroma_planes= 1;

  945.         s->colorspace= 0;

  946.         s->transparency= 1;

  947.         break;

  948.     case PIX_FMT_RGB32:

  949.         s->colorspace= 1;

  950.         s->transparency= 1;

  951.         break;

  952.     case PIX_FMT_0RGB32:

  953.         s->colorspace= 1;

  954.         break;

  955.     default:

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

  957.         return -1;

  958.     }

  959.     if(!s->transparency)

  960.         s->plane_count= 2;

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

  962. 

  963.     s->picture_number=0;

  964. 

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

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

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

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

  969.                 return AVERROR(ENOMEM);

  970.         }

  971.     }

  972.     if(avctx->stats_in){

  973.         char *p= avctx->stats_in;

  974.         uint8_t best_state[256][256];

  975.         int gob_count=0;

  976.         char *next;

  977. 

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

  979. 

  980.         for(;;){

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

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

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

  984.                     if(next==p){

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

  986.                         return -1;

  987.                     }

  988.                     p=next;

  989.                 }

  990.             }

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

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

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

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

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

  996.                             if(next==p){

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

  998.                                 return -1;

  999.                             }

  1000.                             p=next;

  1001.                         }

  1002.                     }

  1003.                 }

  1004.             }

  1005.             gob_count= strtol(p, &next, 0);

  1006.             if(next==p || gob_count <0){

  1007.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1008.                 return -1;

  1009.             }

  1010.             p=next;

  1011.             while(*p=='\n' || *p==' ') p++;

  1012.             if(p[0]==0) break;

  1013.         }

  1014.         sort_stt(s, s->state_transition);

  1015. 

  1016.         find_best_state(best_state, s->state_transition);

  1017. 

  1018.         for(i=0; i<s->quant_table_count; i++){

  1019.             for(j=0; j<s->context_count[i]; j++){

  1020.                 for(k=0; k<32; k++){

  1021.                     double p= 128;

  1022.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1023.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1024.                     }

  1025.                     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)];

  1026.                 }

  1027.             }

  1028.         }

  1029.     }

  1030. 

  1031.     if(s->version>1){

  1032.         s->num_h_slices=2;

  1033.         s->num_v_slices=2;

  1034.         write_extra_header(s);

  1035.     }

  1036. 

  1037.     if(init_slice_contexts(s) < 0)

  1038.         return -1;

  1039.     if(init_slice_state(s) < 0)

  1040.         return -1;

  1041. 

  1042. #define STATS_OUT_SIZE 1024*1024*6

  1043.     if(avctx->flags & CODEC_FLAG_PASS1){

  1044.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1045.         for(i=0; i<s->quant_table_count; i++){

  1046.             for(j=0; j<s->slice_count; j++){

  1047.                 FFV1Context *sf= s->slice_context[j];

  1048.                 av_assert0(!sf->rc_stat2[i]);

  1049.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1050.                 if(!sf->rc_stat2[i])

  1051.                     return AVERROR(ENOMEM);

  1052.             }

  1053.         }

  1054.     }

  1055. 

  1056.     return 0;

  1057. }

  1058. #endif /* CONFIG_FFV1_ENCODER */

  1059. 

  1060. 

  1061. static void clear_state(FFV1Context *f){

  1062.     int i, si, j;

  1063. 

  1064.     for(si=0; si<f->slice_count; si++){

  1065.         FFV1Context *fs= f->slice_context[si];

  1066.         for(i=0; i<f->plane_count; i++){

  1067.             PlaneContext *p= &fs->plane[i];

  1068. 

  1069.             p->interlace_bit_state[0]= 128;

  1070.             p->interlace_bit_state[1]= 128;

  1071. 

  1072.             if(fs->ac){

  1073.                 if(f->initial_states[p->quant_table_index]){

  1074.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1075.                 }else

  1076.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1077.             }else{

  1078.                 for(j=0; j<p->context_count; j++){

  1079.                     p->vlc_state[j].drift= 0;

  1080.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1081.                     p->vlc_state[j].bias= 0;

  1082.                     p->vlc_state[j].count= 1;

  1083.                 }

  1084.             }

  1085.         }

  1086.     }

  1087. }

  1088. 

  1089. #if CONFIG_FFV1_ENCODER

  1090. static int encode_slice(AVCodecContext *c, void *arg){

  1091.     FFV1Context *fs= *(void**)arg;

  1092.     FFV1Context *f= fs->avctx->priv_data;

  1093.     int width = fs->slice_width;

  1094.     int height= fs->slice_height;

  1095.     int x= fs->slice_x;

  1096.     int y= fs->slice_y;

  1097.     AVFrame * const p= &f->picture;

  1098.     const int ps= (c->bits_per_raw_sample>8)+1;

  1099. 

  1100.     if(f->colorspace==0){

  1101.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1102.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1103.         const int cx= x>>f->chroma_h_shift;

  1104.         const int cy= y>>f->chroma_v_shift;

  1105. 

  1106.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1107. 

  1108.         if (f->chroma_planes){

  1109.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1110.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1111.         }

  1112.         if (fs->transparency)

  1113.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1114.     }else{

  1115.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1116.     }

  1117.     emms_c();

  1118. 

  1119.     return 0;

  1120. }

  1121. 

  1122. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1123.     FFV1Context *f = avctx->priv_data;

  1124.     RangeCoder * const c= &f->slice_context[0]->c;

  1125.     AVFrame *pict = data;

  1126.     AVFrame * const p= &f->picture;

  1127.     int used_count= 0;

  1128.     uint8_t keystate=128;

  1129.     uint8_t *buf_p;

  1130.     int i;

  1131. 

  1132.     ff_init_range_encoder(c, buf, buf_size);

  1133.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1134. 

  1135.     *p = *pict;

  1136.     p->pict_type= AV_PICTURE_TYPE_I;

  1137. 

  1138.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1139.         put_rac(c, &keystate, 1);

  1140.         p->key_frame= 1;

  1141.         f->gob_count++;

  1142.         write_header(f);

  1143.         clear_state(f);

  1144.     }else{

  1145.         put_rac(c, &keystate, 0);

  1146.         p->key_frame= 0;

  1147.     }

  1148. 

  1149.     if(!f->ac){

  1150.         used_count += ff_rac_terminate(c);

  1151. //printf("pos=%d\n", used_count);

  1152.         init_put_bits(&f->slice_context[0]->pb, buf + used_count, buf_size - used_count);

  1153.     }else if (f->ac>1){

  1154.         int i;

  1155.         for(i=1; i<256; i++){

  1156.             c->one_state[i]= f->state_transition[i];

  1157.             c->zero_state[256-i]= 256-c->one_state[i];

  1158.         }

  1159.     }

  1160. 

  1161.     for(i=1; i<f->slice_count; i++){

  1162.         FFV1Context *fs= f->slice_context[i];

  1163.         uint8_t *start= buf + (buf_size-used_count)*i/f->slice_count;

  1164.         int len= buf_size/f->slice_count;

  1165. 

  1166.         if(fs->ac){

  1167.             ff_init_range_encoder(&fs->c, start, len);

  1168.         }else{

  1169.             init_put_bits(&fs->pb, start, len);

  1170.         }

  1171.     }

  1172.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1173. 

  1174.     buf_p=buf;

  1175.     for(i=0; i<f->slice_count; i++){

  1176.         FFV1Context *fs= f->slice_context[i];

  1177.         int bytes;

  1178. 

  1179.         if(fs->ac){

  1180.             uint8_t state=128;

  1181.             put_rac(&fs->c, &state, 0);

  1182.             bytes= ff_rac_terminate(&fs->c);

  1183.         }else{

  1184.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1185.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1186.             used_count= 0;

  1187.         }

  1188.         if(i>0){

  1189.             av_assert0(bytes < buf_size/f->slice_count);

  1190.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1191.             av_assert0(bytes < (1<<24));

  1192.             AV_WB24(buf_p+bytes, bytes);

  1193.             bytes+=3;

  1194.         }

  1195.         buf_p += bytes;

  1196.     }

  1197. 

  1198.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1199.         int j, k, m;

  1200.         char *p= avctx->stats_out;

  1201.         char *end= p + STATS_OUT_SIZE;

  1202. 

  1203.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1204.         for(i=0; i<f->quant_table_count; i++)

  1205.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1206. 

  1207.         for(j=0; j<f->slice_count; j++){

  1208.             FFV1Context *fs= f->slice_context[j];

  1209.             for(i=0; i<256; i++){

  1210.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1211.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1212.             }

  1213.             for(i=0; i<f->quant_table_count; i++){

  1214.                 for(k=0; k<f->context_count[i]; k++){

  1215.                     for(m=0; m<32; m++){

  1216.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1217.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1218.                     }

  1219.                 }

  1220.             }

  1221.         }

  1222. 

  1223.         for(j=0; j<256; j++){

  1224.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1225.             p+= strlen(p);

  1226.         }

  1227.         snprintf(p, end-p, "\n");

  1228. 

  1229.         for(i=0; i<f->quant_table_count; i++){

  1230.             for(j=0; j<f->context_count[i]; j++){

  1231.                 for(m=0; m<32; m++){

  1232.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1233.                     p+= strlen(p);

  1234.                 }

  1235.             }

  1236.         }

  1237.         snprintf(p, end-p, "%d\n", f->gob_count);

  1238.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1239.         avctx->stats_out[0] = '\0';

  1240. 

  1241.     f->picture_number++;

  1242.     return buf_p-buf;

  1243. }

  1244. #endif /* CONFIG_FFV1_ENCODER */

  1245. 

  1246. static av_cold int common_end(AVCodecContext *avctx){

  1247.     FFV1Context *s = avctx->priv_data;

  1248.     int i, j;

  1249. 

  1250.     if (avctx->codec->decode && s->picture.data[0])

  1251.         avctx->release_buffer(avctx, &s->picture);

  1252. 

  1253.     for(j=0; j<s->slice_count; j++){

  1254.         FFV1Context *fs= s->slice_context[j];

  1255.         for(i=0; i<s->plane_count; i++){

  1256.             PlaneContext *p= &fs->plane[i];

  1257. 

  1258.             av_freep(&p->state);

  1259.             av_freep(&p->vlc_state);

  1260.         }

  1261.         av_freep(&fs->sample_buffer);

  1262.     }

  1263. 

  1264.     av_freep(&avctx->stats_out);

  1265.     for(j=0; j<s->quant_table_count; j++){

  1266.         av_freep(&s->initial_states[j]);

  1267.         for(i=0; i<s->slice_count; i++){

  1268.             FFV1Context *sf= s->slice_context[i];

  1269.             av_freep(&sf->rc_stat2[j]);

  1270.         }

  1271.         av_freep(&s->rc_stat2[j]);

  1272.     }

  1273. 

  1274.     for(i=0; i<s->slice_count; i++){

  1275.         av_freep(&s->slice_context[i]);

  1276.     }

  1277. 

  1278.     return 0;

  1279. }

  1280. 

  1281. static av_always_inline void decode_line(FFV1Context *s, int w,

  1282.                                          int16_t *sample[2],

  1283.                                          int plane_index, int bits)

  1284. {

  1285.     PlaneContext * const p= &s->plane[plane_index];

  1286.     RangeCoder * const c= &s->c;

  1287.     int x;

  1288.     int run_count=0;

  1289.     int run_mode=0;

  1290.     int run_index= s->run_index;

  1291. 

  1292.     for(x=0; x<w; x++){

  1293.         int diff, context, sign;

  1294. 

  1295.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1296.         if(context < 0){

  1297.             context= -context;

  1298.             sign=1;

  1299.         }else

  1300.             sign=0;

  1301. 

  1302.         av_assert2(context < p->context_count);

  1303. 

  1304.         if(s->ac){

  1305.             diff= get_symbol_inline(c, p->state[context], 1);

  1306.         }else{

  1307.             if(context == 0 && run_mode==0) run_mode=1;

  1308. 

  1309.             if(run_mode){

  1310.                 if(run_count==0 && run_mode==1){

  1311.                     if(get_bits1(&s->gb)){

  1312.                         run_count = 1<<ff_log2_run[run_index];

  1313.                         if(x + run_count <= w) run_index++;

  1314.                     }else{

  1315.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1316.                         else run_count=0;

  1317.                         if(run_index) run_index--;

  1318.                         run_mode=2;

  1319.                     }

  1320.                 }

  1321.                 run_count--;

  1322.                 if(run_count < 0){

  1323.                     run_mode=0;

  1324.                     run_count=0;

  1325.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1326.                     if(diff>=0) diff++;

  1327.                 }else

  1328.                     diff=0;

  1329.             }else

  1330.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1331. 

  1332. //            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));

  1333.         }

  1334. 

  1335.         if(sign) diff= -diff;

  1336. 

  1337.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1338.     }

  1339.     s->run_index= run_index;

  1340. }

  1341. 

  1342. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1343.     int x, y;

  1344.     int16_t *sample[2];

  1345.     sample[0]=s->sample_buffer    +3;

  1346.     sample[1]=s->sample_buffer+w+6+3;

  1347. 

  1348.     s->run_index=0;

  1349. 

  1350.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1351. 

  1352.     for(y=0; y<h; y++){

  1353.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1354. 

  1355.         sample[0]= sample[1];

  1356.         sample[1]= temp;

  1357. 

  1358.         sample[1][-1]= sample[0][0  ];

  1359.         sample[0][ w]= sample[0][w-1];

  1360. 

  1361. //{START_TIMER

  1362.         if(s->avctx->bits_per_raw_sample <= 8){

  1363.             decode_line(s, w, sample, plane_index, 8);

  1364.             for(x=0; x<w; x++){

  1365.                 src[x + stride*y]= sample[1][x];

  1366.             }

  1367.         }else{

  1368.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1369.             if(s->packed_at_lsb){

  1370.                 for(x=0; x<w; x++){

  1371.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1372.                 }

  1373.             }else{

  1374.                 for(x=0; x<w; x++){

  1375.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1376.                 }

  1377.             }

  1378.         }

  1379. //STOP_TIMER("decode-line")}

  1380.     }

  1381. }

  1382. 

  1383. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1384.     int x, y, p;

  1385.     int16_t *sample[4][2];

  1386.     for(x=0; x<4; x++){

  1387.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1388.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1389.     }

  1390. 

  1391.     s->run_index=0;

  1392. 

  1393.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1394. 

  1395.     for(y=0; y<h; y++){

  1396.         for(p=0; p<3 + s->transparency; p++){

  1397.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1398. 

  1399.             sample[p][0]= sample[p][1];

  1400.             sample[p][1]= temp;

  1401. 

  1402.             sample[p][1][-1]= sample[p][0][0  ];

  1403.             sample[p][0][ w]= sample[p][0][w-1];

  1404.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1405.         }

  1406.         for(x=0; x<w; x++){

  1407.             int g= sample[0][1][x];

  1408.             int b= sample[1][1][x];

  1409.             int r= sample[2][1][x];

  1410.             int a= sample[3][1][x];

  1411. 

  1412. //            assert(g>=0 && b>=0 && r>=0);

  1413. //            assert(g<256 && b<512 && r<512);

  1414. 

  1415.             b -= 0x100;

  1416.             r -= 0x100;

  1417.             g -= (b + r)>>2;

  1418.             b += g;

  1419.             r += g;

  1420. 

  1421.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1422.         }

  1423.     }

  1424. }

  1425. 

  1426. static int decode_slice(AVCodecContext *c, void *arg){

  1427.     FFV1Context *fs= *(void**)arg;

  1428.     FFV1Context *f= fs->avctx->priv_data;

  1429.     int width = fs->slice_width;

  1430.     int height= fs->slice_height;

  1431.     int x= fs->slice_x;

  1432.     int y= fs->slice_y;

  1433.     const int ps= (c->bits_per_raw_sample>8)+1;

  1434.     AVFrame * const p= &f->picture;

  1435. 

  1436.     av_assert1(width && height);

  1437.     if(f->colorspace==0){

  1438.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1439.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1440.         const int cx= x>>f->chroma_h_shift;

  1441.         const int cy= y>>f->chroma_v_shift;

  1442.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1443. 

  1444.         if (f->chroma_planes){

  1445.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1446.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1447.         }

  1448.         if (fs->transparency)

  1449.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1450.     }else{

  1451.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1452.     }

  1453. 

  1454.     emms_c();

  1455. 

  1456.     return 0;

  1457. }

  1458. 

  1459. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1460.     int v;

  1461.     int i=0;

  1462.     uint8_t state[CONTEXT_SIZE];

  1463. 

  1464.     memset(state, 128, sizeof(state));

  1465. 

  1466.     for(v=0; i<128 ; v++){

  1467.         int len= get_symbol(c, state, 0) + 1;

  1468. 

  1469.         if(len + i > 128) return -1;

  1470. 

  1471.         while(len--){

  1472.             quant_table[i] = scale*v;

  1473.             i++;

  1474. //printf("%2d ",v);

  1475. //if(i%16==0) printf("\n");

  1476.         }

  1477.     }

  1478. 

  1479.     for(i=1; i<128; i++){

  1480.         quant_table[256-i]= -quant_table[i];

  1481.     }

  1482.     quant_table[128]= -quant_table[127];

  1483. 

  1484.     return 2*v - 1;

  1485. }

  1486. 

  1487. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1488.     int i;

  1489.     int context_count=1;

  1490. 

  1491.     for(i=0; i<5; i++){

  1492.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1493.         if(context_count > 32768U){

  1494.             return -1;

  1495.         }

  1496.     }

  1497.     return (context_count+1)/2;

  1498. }

  1499. 

  1500. static int read_extra_header(FFV1Context *f){

  1501.     RangeCoder * const c= &f->c;

  1502.     uint8_t state[CONTEXT_SIZE];

  1503.     int i, j, k;

  1504.     uint8_t state2[32][CONTEXT_SIZE];

  1505. 

  1506.     memset(state2, 128, sizeof(state2));

  1507.     memset(state, 128, sizeof(state));

  1508. 

  1509.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1510.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1511. 

  1512.     f->version= get_symbol(c, state, 0);

  1513.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1514.     if(f->ac>1){

  1515.         for(i=1; i<256; i++){

  1516.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1517.         }

  1518.     }

  1519.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1520.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1521.     get_rac(c, state); //no chroma = false

  1522.     f->chroma_h_shift= get_symbol(c, state, 0);

  1523.     f->chroma_v_shift= get_symbol(c, state, 0);

  1524.     f->transparency= get_rac(c, state);

  1525.     f->plane_count= 2 + f->transparency;

  1526.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1527.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1528.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1529.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1530.         return -1;

  1531.     }

  1532. 

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

  1534.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1535.         return -1;

  1536.     for(i=0; i<f->quant_table_count; i++){

  1537.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1538.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1539.             return -1;

  1540.         }

  1541.     }

  1542. 

  1543.     if(allocate_initial_states(f) < 0)

  1544.         return AVERROR(ENOMEM);

  1545. 

  1546.     for(i=0; i<f->quant_table_count; i++){

  1547.         if(get_rac(c, state)){

  1548.             for(j=0; j<f->context_count[i]; j++){

  1549.                 for(k=0; k<CONTEXT_SIZE; k++){

  1550.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1551.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1552.                 }

  1553.             }

  1554.         }

  1555.     }

  1556. 

  1557.     return 0;

  1558. }

  1559. 

  1560. static int read_header(FFV1Context *f){

  1561.     uint8_t state[CONTEXT_SIZE];

  1562.     int i, j, context_count;

  1563.     RangeCoder * const c= &f->slice_context[0]->c;

  1564. 

  1565.     memset(state, 128, sizeof(state));

  1566. 

  1567.     if(f->version < 2){

  1568.         f->version= get_symbol(c, state, 0);

  1569.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1570.         if(f->ac>1){

  1571.             for(i=1; i<256; i++){

  1572.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1573.             }

  1574.         }

  1575.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1576.         if(f->version>0)

  1577.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1578.         f->chroma_planes= get_rac(c, state);

  1579.         f->chroma_h_shift= get_symbol(c, state, 0);

  1580.         f->chroma_v_shift= get_symbol(c, state, 0);

  1581.         f->transparency= get_rac(c, state);

  1582.         f->plane_count= 2 + f->transparency;

  1583.     }

  1584. 

  1585.     if(f->colorspace==0){

  1586.         if(f->avctx->bits_per_raw_sample>8 && !f->transparency && !f->chroma_planes){

  1587.             f->avctx->pix_fmt= PIX_FMT_GRAY16;

  1588.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1589.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1590.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1591.             case 0x01: f->avctx->pix_fmt= PIX_FMT_YUV440P; break;

  1592.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1593.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1594.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1595.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1596.             default:

  1597.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1598.                 return -1;

  1599.             }

  1600.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1601.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1602.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUVA444P; break;

  1603.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUVA420P; break;

  1604.             default:

  1605.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1606.                 return -1;

  1607.             }

  1608.         }else if(f->avctx->bits_per_raw_sample==9) {

  1609.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1610.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1611.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1612.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9 ; f->packed_at_lsb=1; break;

  1613.             default:

  1614.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1615.                 return -1;

  1616.             }

  1617.         }else if(f->avctx->bits_per_raw_sample==10) {

  1618.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1619.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1620.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; f->packed_at_lsb=1; break;

  1621.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; f->packed_at_lsb=1; break;

  1622.             default:

  1623.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1624.                 return -1;

  1625.             }

  1626.         }else {

  1627.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1628.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1629.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1630.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1631.             default:

  1632.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1633.                 return -1;

  1634.             }

  1635.         }

  1636.     }else if(f->colorspace==1){

  1637.         if(f->chroma_h_shift || f->chroma_v_shift){

  1638.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1639.             return -1;

  1640.         }

  1641.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1642.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1643.     }else{

  1644.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1645.         return -1;

  1646.     }

  1647. 

  1648. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1649.     if(f->version < 2){

  1650.         context_count= read_quant_tables(c, f->quant_table);

  1651.         if(context_count < 0){

  1652.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1653.                 return -1;

  1654.         }

  1655.     }else{

  1656.         f->slice_count= get_symbol(c, state, 0);

  1657.         if(f->slice_count > (unsigned)MAX_SLICES)

  1658.             return -1;

  1659.     }

  1660. 

  1661.     for(j=0; j<f->slice_count; j++){

  1662.         FFV1Context *fs= f->slice_context[j];

  1663.         fs->ac= f->ac;

  1664.         fs->packed_at_lsb= f->packed_at_lsb;

  1665. 

  1666.         if(f->version >= 2){

  1667.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1668.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1669.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1670.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1671. 

  1672.             fs->slice_x /= f->num_h_slices;

  1673.             fs->slice_y /= f->num_v_slices;

  1674.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1675.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1676.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1677.                 return -1;

  1678.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1679.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1680.                 return -1;

  1681.         }

  1682. 

  1683.         for(i=0; i<f->plane_count; i++){

  1684.             PlaneContext * const p= &fs->plane[i];

  1685. 

  1686.             if(f->version >= 2){

  1687.                 int idx=get_symbol(c, state, 0);

  1688.                 if(idx > (unsigned)f->quant_table_count){

  1689.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1690.                     return -1;

  1691.                 }

  1692.                 p->quant_table_index= idx;

  1693.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1694.                 context_count= f->context_count[idx];

  1695.             }else{

  1696.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1697.             }

  1698. 

  1699.             if(p->context_count < context_count){

  1700.                 av_freep(&p->state);

  1701.                 av_freep(&p->vlc_state);

  1702.             }

  1703.             p->context_count= context_count;

  1704.         }

  1705.     }

  1706. 

  1707.     return 0;

  1708. }

  1709. 

  1710. static av_cold int decode_init(AVCodecContext *avctx)

  1711. {

  1712.     FFV1Context *f = avctx->priv_data;

  1713. 

  1714.     common_init(avctx);

  1715. 

  1716.     if(avctx->extradata && read_extra_header(f) < 0)

  1717.         return -1;

  1718. 

  1719.     if(init_slice_contexts(f) < 0)

  1720.         return -1;

  1721. 

  1722.     return 0;

  1723. }

  1724. 

  1725. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1726.     const uint8_t *buf = avpkt->data;

  1727.     int buf_size = avpkt->size;

  1728.     FFV1Context *f = avctx->priv_data;

  1729.     RangeCoder * const c= &f->slice_context[0]->c;

  1730.     AVFrame * const p= &f->picture;

  1731.     int bytes_read, i;

  1732.     uint8_t keystate= 128;

  1733.     const uint8_t *buf_p;

  1734. 

  1735.     AVFrame *picture = data;

  1736. 

  1737.     /* release previously stored data */

  1738.     if (p->data[0])

  1739.         avctx->release_buffer(avctx, p);

  1740. 

  1741.     ff_init_range_decoder(c, buf, buf_size);

  1742.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1743. 

  1744. 

  1745.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1746.     if(get_rac(c, &keystate)){

  1747.         p->key_frame= 1;

  1748.         if(read_header(f) < 0)

  1749.             return -1;

  1750.         if(init_slice_state(f) < 0)

  1751.             return -1;

  1752. 

  1753.         clear_state(f);

  1754.     }else{

  1755.         p->key_frame= 0;

  1756.     }

  1757.     if(f->ac>1){

  1758.         int i;

  1759.         for(i=1; i<256; i++){

  1760.             c->one_state[i]= f->state_transition[i];

  1761.             c->zero_state[256-i]= 256-c->one_state[i];

  1762.         }

  1763.     }

  1764. 

  1765.     p->reference= 0;

  1766.     if(avctx->get_buffer(avctx, p) < 0){

  1767.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1768.         return -1;

  1769.     }

  1770. 

  1771.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1772.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1773. 

  1774.     if(!f->ac){

  1775.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1776.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1777. //printf("pos=%d\n", bytes_read);

  1778.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1779.     } else {

  1780.         bytes_read = 0; /* avoid warning */

  1781.     }

  1782. 

  1783.     buf_p= buf + buf_size;

  1784.     for(i=f->slice_count-1; i>0; i--){

  1785.         FFV1Context *fs= f->slice_context[i];

  1786.         int v= AV_RB24(buf_p-3)+3;

  1787.         if(buf_p - buf <= v){

  1788.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1789.             return -1;

  1790.         }

  1791.         buf_p -= v;

  1792.         if(fs->ac){

  1793.             ff_init_range_decoder(&fs->c, buf_p, v);

  1794.         }else{

  1795.             init_get_bits(&fs->gb, buf_p, v * 8);

  1796.         }

  1797.     }

  1798. 

  1799.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1800.     f->picture_number++;

  1801. 

  1802.     *picture= *p;

  1803.     *data_size = sizeof(AVFrame);

  1804. 

  1805.     return buf_size;

  1806. }

  1807. 

  1808. AVCodec ff_ffv1_decoder = {

  1809.     .name           = "ffv1",

  1810.     .type           = AVMEDIA_TYPE_VIDEO,

  1811.     .id             = CODEC_ID_FFV1,

  1812.     .priv_data_size = sizeof(FFV1Context),

  1813.     .init           = decode_init,

  1814.     .close          = common_end,

  1815.     .decode         = decode_frame,

  1816.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ | CODEC_CAP_SLICE_THREADS,

  1817.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1818. };

  1819. 

  1820. #if CONFIG_FFV1_ENCODER

  1821. AVCodec ff_ffv1_encoder = {

  1822.     .name           = "ffv1",

  1823.     .type           = AVMEDIA_TYPE_VIDEO,

  1824.     .id             = CODEC_ID_FFV1,

  1825.     .priv_data_size = sizeof(FFV1Context),

  1826.     .init           = encode_init,

  1827.     .encode         = encode_frame,

  1828.     .close          = common_end,

  1829.     .capabilities = CODEC_CAP_SLICE_THREADS,

  1830.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUVA420P, PIX_FMT_YUV444P, PIX_FMT_YUVA444P, PIX_FMT_YUV440P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_0RGB32, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_GRAY16, PIX_FMT_NONE},

  1831.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1832. };

  1833. #endif