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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. 

  40. #ifdef __INTEL_COMPILER

  41. #undef av_flatten

  42. #define av_flatten

  43. #endif

  44. 

  45. #define MAX_PLANES 4

  46. #define CONTEXT_SIZE 32

  47. 

  48. #define MAX_QUANT_TABLES 8

  49. #define MAX_CONTEXT_INPUTS 5

  50. 

  51. extern const uint8_t ff_log2_run[41];

  52. 

  53. static const int8_t quant5_10bit[256]={

  54.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

  55.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  56.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  57.  1, 1, 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, 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,-1,

  67. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-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,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  70. };

  71. 

  72. static const int8_t quant5[256]={

  73.  0, 1, 1, 1, 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, 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,-1,-1,-1,

  89. };

  90. 

  91. static const int8_t quant9_10bit[256]={

  92.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  93.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

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

  95.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

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

  105. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  106. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  107. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  108. };

  109. 

  110. static const int8_t quant11[256]={

  111.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

  112.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

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

  125. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  126. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  127. };

  128. 

  129. static const uint8_t ver2_state[256]= {

  130.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  131.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  132.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  133.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  134.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  135.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  136.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  137.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

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

  139.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  140.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  141.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  142.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  143.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  144.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  145.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  146. };

  147. 

  148. typedef struct VlcState{

  149.     int16_t drift;

  150.     uint16_t error_sum;

  151.     int8_t bias;

  152.     uint8_t count;

  153. } VlcState;

  154. 

  155. typedef struct PlaneContext{

  156.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  157.     int quant_table_index;

  158.     int context_count;

  159.     uint8_t (*state)[CONTEXT_SIZE];

  160.     VlcState *vlc_state;

  161.     uint8_t interlace_bit_state[2];

  162. } PlaneContext;

  163. 

  164. #define MAX_SLICES 256

  165. 

  166. typedef struct FFV1Context{

  167.     AVCodecContext *avctx;

  168.     RangeCoder c;

  169.     GetBitContext gb;

  170.     PutBitContext pb;

  171.     uint64_t rc_stat[256][2];

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

  173.     int version;

  174.     int minor_version;

  175.     int width, height;

  176.     int chroma_h_shift, chroma_v_shift;

  177.     int chroma_planes;

  178.     int transparency;

  179.     int flags;

  180.     int picture_number;

  181.     AVFrame picture;

  182.     int plane_count;

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

  184.     PlaneContext plane[MAX_PLANES];

  185.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  187.     int context_count[MAX_QUANT_TABLES];

  188.     uint8_t state_transition[256];

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

  190.     int run_index;

  191.     int colorspace;

  192.     int16_t *sample_buffer;

  193.     int gob_count;

  194.     int packed_at_lsb;

  195. 

  196.     int quant_table_count;

  197. 

  198.     DSPContext dsp;

  199. 

  200.     struct FFV1Context *slice_context[MAX_SLICES];

  201.     int slice_count;

  202.     int num_v_slices;

  203.     int num_h_slices;

  204.     int slice_width;

  205.     int slice_height;

  206.     int slice_x;

  207.     int slice_y;

  208.     int bits_per_raw_sample;

  209. }FFV1Context;

  210. 

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

  212.     if(bits==8)

  213.         diff= (int8_t)diff;

  214.     else{

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

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

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

  218.     }

  219. 

  220.     return diff;

  221. }

  222. 

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

  224. {

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

  226.     const int  T= last[ 0];

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

  228. 

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

  230. }

  231. 

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

  233.                               int16_t *last, int16_t *last2)

  234. {

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

  236.     const int  T= last[ 0];

  237.     const int RT= last[ 1];

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

  239. 

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

  241.         const int TT= last2[0];

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

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

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

  245.     }else

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

  247. }

  248. 

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

  250.     int i,j,k,m;

  251.     double l2tab[256];

  252. 

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

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

  255. 

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

  257.         double best_len[256];

  258.         double p= i/256.0;

  259. 

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

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

  262. 

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

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

  265.             double len=0;

  266.             occ[j]=1.0;

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

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

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

  270.                     if(occ[m]){

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

  272.                                       + (1-p)*l2tab[256-m]);

  273.                     }

  274.                 }

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

  276.                     best_len[k]= len;

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

  278.                 }

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

  280.                     if(occ[m]){

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

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

  283.                     }

  284.                 }

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

  286.             }

  287.         }

  288.     }

  289. }

  290. 

  291. 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]){

  292.     int i;

  293. 

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

  295. do{\

  296.     if(rc_stat){\

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

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

  299.     }\

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

  301. }while(0)

  302. 

  303.     if(v){

  304.         const int a= FFABS(v);

  305.         const int e= av_log2(a);

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

  307.         if(e<=9){

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

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

  310.             }

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

  312. 

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

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

  315.             }

  316. 

  317.             if(is_signed)

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

  319.         }else{

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

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

  322.             }

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

  324. 

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

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

  327.             }

  328. 

  329.             if(is_signed)

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

  331.         }

  332.     }else{

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

  334.     }

  335. #undef put_rac

  336. }

  337. 

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

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

  340. }

  341. 

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

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

  344.         return 0;

  345.     else{

  346.         int i, e, a;

  347.         e= 0;

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

  349.             e++;

  350.         }

  351. 

  352.         a= 1;

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

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

  355.         }

  356. 

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

  358.         return (a^e)-e;

  359.     }

  360. }

  361. 

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

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

  364. }

  365. 

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

  367.     int drift= state->drift;

  368.     int count= state->count;

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

  370.     drift += v;

  371. 

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

  373.         count >>= 1;

  374.         drift >>= 1;

  375.         state->error_sum >>= 1;

  376.     }

  377.     count++;

  378. 

  379.     if(drift <= -count){

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

  381. 

  382.         drift += count;

  383.         if(drift <= -count)

  384.             drift= -count + 1;

  385.     }else if(drift > 0){

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

  387. 

  388.         drift -= count;

  389.         if(drift > 0)

  390.             drift= 0;

  391.     }

  392. 

  393.     state->drift= drift;

  394.     state->count= count;

  395. }

  396. 

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

  398.     int i, k, code;

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

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

  401. 

  402.     i= state->count;

  403.     k=0;

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

  405.         k++;

  406.         i += i;

  407.     }

  408. 

  409.     assert(k<=8);

  410. 

  411. #if 0 // JPEG LS

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

  413.     else                                         code= v;

  414. #else

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

  416. #endif

  417. 

  418. //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);

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

  420. 

  421.     update_vlc_state(state, v);

  422. }

  423. 

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

  425.     int k, i, v, ret;

  426. 

  427.     i= state->count;

  428.     k=0;

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

  430.         k++;

  431.         i += i;

  432.     }

  433. 

  434.     assert(k<=8);

  435. 

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

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

  438. 

  439. #if 0 // JPEG LS

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

  441. #else

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

  443. #endif

  444. 

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

  446. 

  447.     update_vlc_state(state, v);

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

  449.     return ret;

  450. }

  451. 

  452. #if CONFIG_FFV1_ENCODER

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

  454.                                         int16_t *sample[3],

  455.                                         int plane_index, int bits)

  456. {

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

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

  459.     int x;

  460.     int run_index= s->run_index;

  461.     int run_count=0;

  462.     int run_mode=0;

  463. 

  464.     if(s->ac){

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

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

  467.             return -1;

  468.         }

  469.     }else{

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

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

  472.             return -1;

  473.         }

  474.     }

  475. 

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

  477.         int diff, context;

  478. 

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

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

  481. 

  482.         if(context < 0){

  483.             context = -context;

  484.             diff= -diff;

  485.         }

  486. 

  487.         diff= fold(diff, bits);

  488. 

  489.         if(s->ac){

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

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

  492.             }else{

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

  494.             }

  495.         }else{

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

  497. 

  498.             if(run_mode){

  499. 

  500.                 if(diff){

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

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

  503.                         run_index++;

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

  505.                     }

  506. 

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

  508.                     if(run_index) run_index--;

  509.                     run_count=0;

  510.                     run_mode=0;

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

  512.                 }else{

  513.                     run_count++;

  514.                 }

  515.             }

  516. 

  517. //            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));

  518. 

  519.             if(run_mode == 0)

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

  521.         }

  522.     }

  523.     if(run_mode){

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

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

  526.             run_index++;

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

  528.         }

  529. 

  530.         if(run_count)

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

  532.     }

  533.     s->run_index= run_index;

  534. 

  535.     return 0;

  536. }

  537. 

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

  539.     int x,y,i;

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

  541.     int16_t *sample[3];

  542.     s->run_index=0;

  543. 

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

  545. 

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

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

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

  549. 

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

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

  552. //{START_TIMER

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

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

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

  556.             }

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

  558.         }else{

  559.             if(s->packed_at_lsb){

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

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

  562.                 }

  563.             }else{

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

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

  566.                 }

  567.             }

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

  569.         }

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

  571.     }

  572. }

  573. 

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

  575.     int x, y, p, i;

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

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

  578.     s->run_index=0;

  579. 

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

  581. 

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

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

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

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

  586. 

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

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

  589.             int b= v&0xFF;

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

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

  592.             int a=  v>>24;

  593. 

  594.             b -= g;

  595.             r -= g;

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

  597.             b += 0x100;

  598.             r += 0x100;

  599. 

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

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

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

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

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

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

  606.         }

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

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

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

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

  611.         }

  612.     }

  613. }

  614. 

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

  616.     int last=0;

  617.     int i;

  618.     uint8_t state[CONTEXT_SIZE];

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

  620. 

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

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

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

  624.             last= i;

  625.         }

  626.     }

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

  628. }

  629. 

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

  631.     int i;

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

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

  634. }

  635. 

  636. static void write_header(FFV1Context *f){

  637.     uint8_t state[CONTEXT_SIZE];

  638.     int i, j;

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

  640. 

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

  642. 

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

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

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

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

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

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

  649.             }

  650.         }

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

  652.         if(f->version>0)

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

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

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

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

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

  658. 

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

  660.     }else{

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

  662.         if(f->version < 3){

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

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

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

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

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

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

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

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

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

  672.             }

  673.         }

  674.         }

  675.     }

  676. }

  677. #endif /* CONFIG_FFV1_ENCODER */

  678. 

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

  680.     FFV1Context *s = avctx->priv_data;

  681. 

  682.     s->avctx= avctx;

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

  684. 

  685.     avcodec_get_frame_defaults(&s->picture);

  686. 

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

  688. 

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

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

  691. 

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

  693.     //defaults

  694.     s->num_h_slices=1;

  695.     s->num_v_slices=1;

  696. 

  697. 

  698.     return 0;

  699. }

  700. 

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

  702.     int j;

  703. 

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

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

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

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

  708. 

  709.             if(fs->ac){

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

  711.                 if(!p->    state)

  712.                     return AVERROR(ENOMEM);

  713.             }else{

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

  715.                 if(!p->vlc_state)

  716.                     return AVERROR(ENOMEM);

  717.             }

  718.         }

  719. 

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

  721.             //FIXME only redo if state_transition changed

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

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

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

  725.             }

  726.         }

  727. 

  728.     return 0;

  729. }

  730. 

  731. static int init_slices_state(FFV1Context *f){

  732.     int i;

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

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

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

  736.             return -1;

  737.     }

  738.     return 0;

  739. }

  740. 

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

  742.     int i;

  743. 

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

  745. 

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

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

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

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

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

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

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

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

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

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

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

  757. 

  758.         fs->slice_width = sxe - sxs;

  759.         fs->slice_height= sye - sys;

  760.         fs->slice_x     = sxs;

  761.         fs->slice_y     = sys;

  762. 

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

  764.         if (!fs->sample_buffer)

  765.             return AVERROR(ENOMEM);

  766.     }

  767.     return 0;

  768. }

  769. 

  770. static int allocate_initial_states(FFV1Context *f){

  771.     int i;

  772. 

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

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

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

  776.             return AVERROR(ENOMEM);

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

  778.     }

  779.     return 0;

  780. }

  781. 

  782. #if CONFIG_FFV1_ENCODER

  783. static int write_extra_header(FFV1Context *f){

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

  785.     uint8_t state[CONTEXT_SIZE];

  786.     int i, j, k;

  787.     uint8_t state2[32][CONTEXT_SIZE];

  788.     unsigned v;

  789. 

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

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

  792. 

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

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

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

  796. 

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

  798.     if(f->version > 2)

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

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

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

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

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

  804.         }

  805.     }

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

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

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

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

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

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

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

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

  814. 

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

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

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

  818. 

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

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

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

  822.                 break;

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

  824.             put_rac(c, state, 1);

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

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

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

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

  829.                 }

  830.             }

  831.         }else{

  832.             put_rac(c, state, 0);

  833.         }

  834.     }

  835. 

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

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

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

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

  840. 

  841.     return 0;

  842. }

  843. 

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

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

  846. 

  847.     do{

  848.         changed=0;

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

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

  851. #define COST(old, new) \

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

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

  854. 

  855. #define COST2(old, new) \

  856.     COST(old, new)\

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

  858. 

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

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

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

  862.                     int j;

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

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

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

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

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

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

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

  870.                     }

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

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

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

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

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

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

  877.                         }

  878.                     }

  879.                     print=changed=1;

  880.                 }

  881.             }

  882.         }

  883.     }while(changed);

  884.     return print;

  885. }

  886. 

  887. static av_cold int encode_init(AVCodecContext *avctx)

  888. {

  889.     FFV1Context *s = avctx->priv_data;

  890.     int i, j, k, m;

  891. 

  892.     common_init(avctx);

  893. 

  894.     s->version=0;

  895. 

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

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

  898. 

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

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

  901.         return -1;

  902.     }

  903. 

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

  905. 

  906.     if(s->ac>1)

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

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

  909. 

  910.     s->plane_count=3;

  911.     switch(avctx->pix_fmt){

  912.     case PIX_FMT_YUV444P9:

  913.     case PIX_FMT_YUV422P9:

  914.     case PIX_FMT_YUV420P9:

  915.         if (!avctx->bits_per_raw_sample)

  916.             s->bits_per_raw_sample = 9;

  917.     case PIX_FMT_YUV444P10:

  918.     case PIX_FMT_YUV420P10:

  919.     case PIX_FMT_YUV422P10:

  920.         s->packed_at_lsb = 1;

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

  922.             s->bits_per_raw_sample = 10;

  923.     case PIX_FMT_GRAY16:

  924.     case PIX_FMT_YUV444P16:

  925.     case PIX_FMT_YUV422P16:

  926.     case PIX_FMT_YUV420P16:

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

  928.             s->bits_per_raw_sample = 16;

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

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

  931.         }

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

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

  934.             return -1;

  935.         }

  936.         if(!s->ac){

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

  938.             return -1;

  939.         }

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

  941.     case PIX_FMT_GRAY8:

  942.     case PIX_FMT_YUV444P:

  943.     case PIX_FMT_YUV440P:

  944.     case PIX_FMT_YUV422P:

  945.     case PIX_FMT_YUV420P:

  946.     case PIX_FMT_YUV411P:

  947.     case PIX_FMT_YUV410P:

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

  949.         s->colorspace= 0;

  950.         break;

  951.     case PIX_FMT_YUVA444P:

  952.     case PIX_FMT_YUVA420P:

  953.         s->chroma_planes= 1;

  954.         s->colorspace= 0;

  955.         s->transparency= 1;

  956.         break;

  957.     case PIX_FMT_RGB32:

  958.         s->colorspace= 1;

  959.         s->transparency= 1;

  960.         break;

  961.     case PIX_FMT_0RGB32:

  962.         s->colorspace= 1;

  963.         break;

  964.     default:

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

  966.         return -1;

  967.     }

  968.     if (s->transparency) {

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

  970.     }

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

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

  973.         return AVERROR(EINVAL);

  974.     }

  975. 

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

  977.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  987.         }else{

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

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

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

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

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

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

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

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

  996.         }

  997.     }

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

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

  1000.     memcpy(s->quant_table, s->quant_tables[avctx->context_model], sizeof(s->quant_table));

  1001. 

  1002.     for(i=0; i<s->plane_count; i++){

  1003.         PlaneContext * const p= &s->plane[i];

  1004. 

  1005.         memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));

  1006.         p->quant_table_index= avctx->context_model;

  1007.         p->context_count= s->context_count[p->quant_table_index];

  1008.     }

  1009. 

  1010.     if(allocate_initial_states(s) < 0)

  1011.         return AVERROR(ENOMEM);

  1012. 

  1013.     avctx->coded_frame= &s->picture;

  1014.     if(!s->transparency)

  1015.         s->plane_count= 2;

  1016.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  1017. 

  1018.     s->picture_number=0;

  1019. 

  1020.     if(avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  1021.         for(i=0; i<s->quant_table_count; i++){

  1022.             s->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*s->rc_stat2[i]));

  1023.             if(!s->rc_stat2[i])

  1024.                 return AVERROR(ENOMEM);

  1025.         }

  1026.     }

  1027.     if(avctx->stats_in){

  1028.         char *p= avctx->stats_in;

  1029.         uint8_t best_state[256][256];

  1030.         int gob_count=0;

  1031.         char *next;

  1032. 

  1033.         av_assert0(s->version>=2);

  1034. 

  1035.         for(;;){

  1036.             for(j=0; j<256; j++){

  1037.                 for(i=0; i<2; i++){

  1038.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1039.                     if(next==p){

  1040.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1041.                         return -1;

  1042.                     }

  1043.                     p=next;

  1044.                 }

  1045.             }

  1046.             for(i=0; i<s->quant_table_count; i++){

  1047.                 for(j=0; j<s->context_count[i]; j++){

  1048.                     for(k=0; k<32; k++){

  1049.                         for(m=0; m<2; m++){

  1050.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1051.                             if(next==p){

  1052.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1053.                                 return -1;

  1054.                             }

  1055.                             p=next;

  1056.                         }

  1057.                     }

  1058.                 }

  1059.             }

  1060.             gob_count= strtol(p, &next, 0);

  1061.             if(next==p || gob_count <0){

  1062.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1063.                 return -1;

  1064.             }

  1065.             p=next;

  1066.             while(*p=='\n' || *p==' ') p++;

  1067.             if(p[0]==0) break;

  1068.         }

  1069.         sort_stt(s, s->state_transition);

  1070. 

  1071.         find_best_state(best_state, s->state_transition);

  1072. 

  1073.         for(i=0; i<s->quant_table_count; i++){

  1074.             for(j=0; j<s->context_count[i]; j++){

  1075.                 for(k=0; k<32; k++){

  1076.                     double p= 128;

  1077.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1078.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1079.                     }

  1080.                     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)];

  1081.                 }

  1082.             }

  1083.         }

  1084.     }

  1085. 

  1086.     if(s->version>1){

  1087.         for(s->num_v_slices=2; s->num_v_slices<9; s->num_v_slices++){

  1088.             for(s->num_h_slices=s->num_v_slices; s->num_h_slices<2*s->num_v_slices; s->num_h_slices++){

  1089.                 if(avctx->slices == s->num_h_slices * s->num_v_slices && avctx->slices <= 64)

  1090.                     goto slices_ok;

  1091.             }

  1092.         }

  1093.         av_log(avctx, AV_LOG_ERROR, "Unsupported number %d of slices requested\n", avctx->slices);

  1094.         return -1;

  1095.         slices_ok:

  1096.         write_extra_header(s);

  1097.     }

  1098. 

  1099.     if(init_slice_contexts(s) < 0)

  1100.         return -1;

  1101.     if(init_slices_state(s) < 0)

  1102.         return -1;

  1103. 

  1104. #define STATS_OUT_SIZE 1024*1024*6

  1105.     if(avctx->flags & CODEC_FLAG_PASS1){

  1106.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1107.         for(i=0; i<s->quant_table_count; i++){

  1108.             for(j=0; j<s->slice_count; j++){

  1109.                 FFV1Context *sf= s->slice_context[j];

  1110.                 av_assert0(!sf->rc_stat2[i]);

  1111.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1112.                 if(!sf->rc_stat2[i])

  1113.                     return AVERROR(ENOMEM);

  1114.             }

  1115.         }

  1116.     }

  1117. 

  1118.     return 0;

  1119. }

  1120. #endif /* CONFIG_FFV1_ENCODER */

  1121. 

  1122. 

  1123. static void clear_slice_state(FFV1Context *f, FFV1Context *fs){

  1124.     int i, j;

  1125. 

  1126.         for(i=0; i<f->plane_count; i++){

  1127.             PlaneContext *p= &fs->plane[i];

  1128. 

  1129.             p->interlace_bit_state[0]= 128;

  1130.             p->interlace_bit_state[1]= 128;

  1131. 

  1132.             if(fs->ac){

  1133.                 if(f->initial_states[p->quant_table_index]){

  1134.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1135.                 }else

  1136.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1137.             }else{

  1138.                 for(j=0; j<p->context_count; j++){

  1139.                     p->vlc_state[j].drift= 0;

  1140.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1141.                     p->vlc_state[j].bias= 0;

  1142.                     p->vlc_state[j].count= 1;

  1143.                 }

  1144.             }

  1145.         }

  1146. }

  1147. 

  1148. static void clear_state(FFV1Context *f){

  1149.     int si;

  1150. 

  1151.     for(si=0; si<f->slice_count; si++){

  1152.         FFV1Context *fs= f->slice_context[si];

  1153.         clear_slice_state(f, fs);

  1154.     }

  1155. }

  1156. 

  1157. #if CONFIG_FFV1_ENCODER

  1158. 

  1159. static void encode_slice_header(FFV1Context *f, FFV1Context *fs){

  1160.     RangeCoder *c = &fs->c;

  1161.     uint8_t state[CONTEXT_SIZE];

  1162.     int j;

  1163.     memset(state, 128, sizeof(state));

  1164. 

  1165.     put_symbol(c, state, (fs->slice_x     +1)*f->num_h_slices / f->width   , 0);

  1166.     put_symbol(c, state, (fs->slice_y     +1)*f->num_v_slices / f->height  , 0);

  1167.     put_symbol(c, state, (fs->slice_width +1)*f->num_h_slices / f->width -1, 0);

  1168.     put_symbol(c, state, (fs->slice_height+1)*f->num_v_slices / f->height-1, 0);

  1169.     for(j=0; j<f->plane_count; j++){

  1170.         put_symbol(c, state, f->plane[j].quant_table_index, 0);

  1171.         av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);

  1172.     }

  1173.     if(!f->picture.interlaced_frame) put_symbol(c, state, 3, 0);

  1174.     else                             put_symbol(c, state, 1 + !f->picture.top_field_first, 0);

  1175.     put_symbol(c, state, f->picture.sample_aspect_ratio.num, 0);

  1176.     put_symbol(c, state, f->picture.sample_aspect_ratio.den, 0);

  1177. }

  1178. 

  1179. static int encode_slice(AVCodecContext *c, void *arg){

  1180.     FFV1Context *fs= *(void**)arg;

  1181.     FFV1Context *f= fs->avctx->priv_data;

  1182.     int width = fs->slice_width;

  1183.     int height= fs->slice_height;

  1184.     int x= fs->slice_x;

  1185.     int y= fs->slice_y;

  1186.     AVFrame * const p= &f->picture;

  1187.     const int ps= (f->bits_per_raw_sample>8)+1;

  1188. 

  1189.     if(f->version > 2){

  1190.         encode_slice_header(f, fs);

  1191.     }

  1192. 

  1193.     if(f->colorspace==0){

  1194.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1195.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1196.         const int cx= x>>f->chroma_h_shift;

  1197.         const int cy= y>>f->chroma_v_shift;

  1198. 

  1199.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1200. 

  1201.         if (f->chroma_planes){

  1202.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1203.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1204.         }

  1205.         if (fs->transparency)

  1206.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1207.     }else{

  1208.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1209.     }

  1210.     emms_c();

  1211. 

  1212.     return 0;

  1213. }

  1214. 

  1215. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1216.                         const AVFrame *pict, int *got_packet)

  1217. {

  1218.     FFV1Context *f = avctx->priv_data;

  1219.     RangeCoder * const c= &f->slice_context[0]->c;

  1220.     AVFrame * const p= &f->picture;

  1221.     int used_count= 0;

  1222.     uint8_t keystate=128;

  1223.     uint8_t *buf_p;

  1224.     int i, ret;

  1225. 

  1226.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1227.                                   + FF_MIN_BUFFER_SIZE)) < 0)

  1228.         return ret;

  1229. 

  1230.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1231.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1232. 

  1233.     *p = *pict;

  1234.     p->pict_type= AV_PICTURE_TYPE_I;

  1235. 

  1236.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1237.         put_rac(c, &keystate, 1);

  1238.         p->key_frame= 1;

  1239.         f->gob_count++;

  1240.         write_header(f);

  1241.         clear_state(f);

  1242.     }else{

  1243.         put_rac(c, &keystate, 0);

  1244.         p->key_frame= 0;

  1245.     }

  1246. 

  1247.     if(!f->ac){

  1248.         used_count += ff_rac_terminate(c);

  1249. //printf("pos=%d\n", used_count);

  1250.         init_put_bits(&f->slice_context[0]->pb, pkt->data + used_count, pkt->size - used_count);

  1251.     }else if (f->ac>1){

  1252.         int i;

  1253.         for(i=1; i<256; i++){

  1254.             c->one_state[i]= f->state_transition[i];

  1255.             c->zero_state[256-i]= 256-c->one_state[i];

  1256.         }

  1257.     }

  1258. 

  1259.     for(i=1; i<f->slice_count; i++){

  1260.         FFV1Context *fs= f->slice_context[i];

  1261.         uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;

  1262.         int len = pkt->size/f->slice_count;

  1263. 

  1264.         if(fs->ac){

  1265.             ff_init_range_encoder(&fs->c, start, len);

  1266.         }else{

  1267.             init_put_bits(&fs->pb, start, len);

  1268.         }

  1269.     }

  1270.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1271. 

  1272.     buf_p = pkt->data;

  1273.     for(i=0; i<f->slice_count; i++){

  1274.         FFV1Context *fs= f->slice_context[i];

  1275.         int bytes;

  1276. 

  1277.         if(fs->ac){

  1278.             uint8_t state=128;

  1279.             put_rac(&fs->c, &state, 0);

  1280.             bytes= ff_rac_terminate(&fs->c);

  1281.         }else{

  1282.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1283.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1284.             used_count= 0;

  1285.         }

  1286.         if(i>0){

  1287.             av_assert0(bytes < pkt->size/f->slice_count);

  1288.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1289.             av_assert0(bytes < (1<<24));

  1290.             AV_WB24(buf_p+bytes, bytes);

  1291.             bytes+=3;

  1292.         }

  1293.         buf_p += bytes;

  1294.     }

  1295. 

  1296.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1297.         int j, k, m;

  1298.         char *p= avctx->stats_out;

  1299.         char *end= p + STATS_OUT_SIZE;

  1300. 

  1301.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1302.         for(i=0; i<f->quant_table_count; i++)

  1303.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1304. 

  1305.         for(j=0; j<f->slice_count; j++){

  1306.             FFV1Context *fs= f->slice_context[j];

  1307.             for(i=0; i<256; i++){

  1308.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1309.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1310.             }

  1311.             for(i=0; i<f->quant_table_count; i++){

  1312.                 for(k=0; k<f->context_count[i]; k++){

  1313.                     for(m=0; m<32; m++){

  1314.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1315.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1316.                     }

  1317.                 }

  1318.             }

  1319.         }

  1320. 

  1321.         for(j=0; j<256; j++){

  1322.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1323.             p+= strlen(p);

  1324.         }

  1325.         snprintf(p, end-p, "\n");

  1326. 

  1327.         for(i=0; i<f->quant_table_count; i++){

  1328.             for(j=0; j<f->context_count[i]; j++){

  1329.                 for(m=0; m<32; m++){

  1330.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1331.                     p+= strlen(p);

  1332.                 }

  1333.             }

  1334.         }

  1335.         snprintf(p, end-p, "%d\n", f->gob_count);

  1336.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1337.         avctx->stats_out[0] = '\0';

  1338. 

  1339.     f->picture_number++;

  1340.     pkt->size   = buf_p - pkt->data;

  1341.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1342.     *got_packet = 1;

  1343. 

  1344.     return 0;

  1345. }

  1346. #endif /* CONFIG_FFV1_ENCODER */

  1347. 

  1348. static av_cold int common_end(AVCodecContext *avctx){

  1349.     FFV1Context *s = avctx->priv_data;

  1350.     int i, j;

  1351. 

  1352.     if (avctx->codec->decode && s->picture.data[0])

  1353.         avctx->release_buffer(avctx, &s->picture);

  1354. 

  1355.     for(j=0; j<s->slice_count; j++){

  1356.         FFV1Context *fs= s->slice_context[j];

  1357.         for(i=0; i<s->plane_count; i++){

  1358.             PlaneContext *p= &fs->plane[i];

  1359. 

  1360.             av_freep(&p->state);

  1361.             av_freep(&p->vlc_state);

  1362.         }

  1363.         av_freep(&fs->sample_buffer);

  1364.     }

  1365. 

  1366.     av_freep(&avctx->stats_out);

  1367.     for(j=0; j<s->quant_table_count; j++){

  1368.         av_freep(&s->initial_states[j]);

  1369.         for(i=0; i<s->slice_count; i++){

  1370.             FFV1Context *sf= s->slice_context[i];

  1371.             av_freep(&sf->rc_stat2[j]);

  1372.         }

  1373.         av_freep(&s->rc_stat2[j]);

  1374.     }

  1375. 

  1376.     for(i=0; i<s->slice_count; i++){

  1377.         av_freep(&s->slice_context[i]);

  1378.     }

  1379. 

  1380.     return 0;

  1381. }

  1382. 

  1383. static av_always_inline void decode_line(FFV1Context *s, int w,

  1384.                                          int16_t *sample[2],

  1385.                                          int plane_index, int bits)

  1386. {

  1387.     PlaneContext * const p= &s->plane[plane_index];

  1388.     RangeCoder * const c= &s->c;

  1389.     int x;

  1390.     int run_count=0;

  1391.     int run_mode=0;

  1392.     int run_index= s->run_index;

  1393. 

  1394.     for(x=0; x<w; x++){

  1395.         int diff, context, sign;

  1396. 

  1397.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1398.         if(context < 0){

  1399.             context= -context;

  1400.             sign=1;

  1401.         }else

  1402.             sign=0;

  1403. 

  1404.         av_assert2(context < p->context_count);

  1405. 

  1406.         if(s->ac){

  1407.             diff= get_symbol_inline(c, p->state[context], 1);

  1408.         }else{

  1409.             if(context == 0 && run_mode==0) run_mode=1;

  1410. 

  1411.             if(run_mode){

  1412.                 if(run_count==0 && run_mode==1){

  1413.                     if(get_bits1(&s->gb)){

  1414.                         run_count = 1<<ff_log2_run[run_index];

  1415.                         if(x + run_count <= w) run_index++;

  1416.                     }else{

  1417.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1418.                         else run_count=0;

  1419.                         if(run_index) run_index--;

  1420.                         run_mode=2;

  1421.                     }

  1422.                 }

  1423.                 run_count--;

  1424.                 if(run_count < 0){

  1425.                     run_mode=0;

  1426.                     run_count=0;

  1427.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1428.                     if(diff>=0) diff++;

  1429.                 }else

  1430.                     diff=0;

  1431.             }else

  1432.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1433. 

  1434. //            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));

  1435.         }

  1436. 

  1437.         if(sign) diff= -diff;

  1438. 

  1439.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1440.     }

  1441.     s->run_index= run_index;

  1442. }

  1443. 

  1444. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1445.     int x, y;

  1446.     int16_t *sample[2];

  1447.     sample[0]=s->sample_buffer    +3;

  1448.     sample[1]=s->sample_buffer+w+6+3;

  1449. 

  1450.     s->run_index=0;

  1451. 

  1452.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1453. 

  1454.     for(y=0; y<h; y++){

  1455.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1456. 

  1457.         sample[0]= sample[1];

  1458.         sample[1]= temp;

  1459. 

  1460.         sample[1][-1]= sample[0][0  ];

  1461.         sample[0][ w]= sample[0][w-1];

  1462. 

  1463. //{START_TIMER

  1464.         if(s->avctx->bits_per_raw_sample <= 8){

  1465.             decode_line(s, w, sample, plane_index, 8);

  1466.             for(x=0; x<w; x++){

  1467.                 src[x + stride*y]= sample[1][x];

  1468.             }

  1469.         }else{

  1470.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1471.             if(s->packed_at_lsb){

  1472.                 for(x=0; x<w; x++){

  1473.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1474.                 }

  1475.             }else{

  1476.                 for(x=0; x<w; x++){

  1477.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1478.                 }

  1479.             }

  1480.         }

  1481. //STOP_TIMER("decode-line")}

  1482.     }

  1483. }

  1484. 

  1485. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1486.     int x, y, p;

  1487.     int16_t *sample[4][2];

  1488.     for(x=0; x<4; x++){

  1489.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1490.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1491.     }

  1492. 

  1493.     s->run_index=0;

  1494. 

  1495.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1496. 

  1497.     for(y=0; y<h; y++){

  1498.         for(p=0; p<3 + s->transparency; p++){

  1499.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1500. 

  1501.             sample[p][0]= sample[p][1];

  1502.             sample[p][1]= temp;

  1503. 

  1504.             sample[p][1][-1]= sample[p][0][0  ];

  1505.             sample[p][0][ w]= sample[p][0][w-1];

  1506.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1507.         }

  1508.         for(x=0; x<w; x++){

  1509.             int g= sample[0][1][x];

  1510.             int b= sample[1][1][x];

  1511.             int r= sample[2][1][x];

  1512.             int a= sample[3][1][x];

  1513. 

  1514. //            assert(g>=0 && b>=0 && r>=0);

  1515. //            assert(g<256 && b<512 && r<512);

  1516. 

  1517.             b -= 0x100;

  1518.             r -= 0x100;

  1519.             g -= (b + r)>>2;

  1520.             b += g;

  1521.             r += g;

  1522. 

  1523.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1524.         }

  1525.     }

  1526. }

  1527. 

  1528. static int decode_slice_header(FFV1Context *f, FFV1Context *fs){

  1529.     RangeCoder *c = &fs->c;

  1530.     uint8_t state[CONTEXT_SIZE];

  1531.     unsigned ps, i, context_count;

  1532.     memset(state, 128, sizeof(state));

  1533. 

  1534.     av_assert0(f->version > 2);

  1535. 

  1536.     fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1537.     fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1538.     fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1539.     fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1540. 

  1541.     fs->slice_x /= f->num_h_slices;

  1542.     fs->slice_y /= f->num_v_slices;

  1543.     fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1544.     fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1545.     if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1546.         return -1;

  1547.     if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1548.         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1549.         return -1;

  1550. 

  1551.     for(i=0; i<f->plane_count; i++){

  1552.         PlaneContext * const p= &fs->plane[i];

  1553.         int idx=get_symbol(c, state, 0);

  1554.         if(idx > (unsigned)f->quant_table_count){

  1555.             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1556.             return -1;

  1557.         }

  1558.         p->quant_table_index= idx;

  1559.         memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1560.         context_count= f->context_count[idx];

  1561. 

  1562.         if(p->context_count < context_count){

  1563.             av_freep(&p->state);

  1564.             av_freep(&p->vlc_state);

  1565.         }

  1566.         p->context_count= context_count;

  1567.     }

  1568. 

  1569.     ps = get_symbol(c, state, 0);

  1570.     if(ps==1){

  1571.         f->picture.interlaced_frame = 1;

  1572.         f->picture.top_field_first  = 1;

  1573.     } else if(ps==2){

  1574.         f->picture.interlaced_frame = 1;

  1575.         f->picture.top_field_first  = 0;

  1576.     } else if(ps==3){

  1577.         f->picture.interlaced_frame = 0;

  1578.     }

  1579.     f->picture.sample_aspect_ratio.num = get_symbol(c, state, 0);

  1580.     f->picture.sample_aspect_ratio.den = get_symbol(c, state, 0);

  1581. 

  1582.     return 0;

  1583. }

  1584. 

  1585. static int decode_slice(AVCodecContext *c, void *arg){

  1586.     FFV1Context *fs= *(void**)arg;

  1587.     FFV1Context *f= fs->avctx->priv_data;

  1588.     int width, height, x, y;

  1589.     const int ps= (c->bits_per_raw_sample>8)+1;

  1590.     AVFrame * const p= &f->picture;

  1591. 

  1592.     if(f->version > 2){

  1593.         if(decode_slice_header(f, fs) < 0)

  1594.             return AVERROR_INVALIDDATA;

  1595. 

  1596.         if(init_slice_state(f, fs) < 0)

  1597.             return AVERROR(ENOMEM);

  1598.     }

  1599.     if(f->picture.key_frame)

  1600.         clear_slice_state(f, fs);

  1601.     width = fs->slice_width;

  1602.     height= fs->slice_height;

  1603.     x= fs->slice_x;

  1604.     y= fs->slice_y;

  1605. 

  1606.     av_assert1(width && height);

  1607.     if(f->colorspace==0){

  1608.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1609.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1610.         const int cx= x>>f->chroma_h_shift;

  1611.         const int cy= y>>f->chroma_v_shift;

  1612.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1613. 

  1614.         if (f->chroma_planes){

  1615.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1616.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1617.         }

  1618.         if (fs->transparency)

  1619.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1620.     }else{

  1621.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1622.     }

  1623. 

  1624.     emms_c();

  1625. 

  1626.     return 0;

  1627. }

  1628. 

  1629. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1630.     int v;

  1631.     int i=0;

  1632.     uint8_t state[CONTEXT_SIZE];

  1633. 

  1634.     memset(state, 128, sizeof(state));

  1635. 

  1636.     for(v=0; i<128 ; v++){

  1637.         int len= get_symbol(c, state, 0) + 1;

  1638. 

  1639.         if(len + i > 128) return -1;

  1640. 

  1641.         while(len--){

  1642.             quant_table[i] = scale*v;

  1643.             i++;

  1644. //printf("%2d ",v);

  1645. //if(i%16==0) printf("\n");

  1646.         }

  1647.     }

  1648. 

  1649.     for(i=1; i<128; i++){

  1650.         quant_table[256-i]= -quant_table[i];

  1651.     }

  1652.     quant_table[128]= -quant_table[127];

  1653. 

  1654.     return 2*v - 1;

  1655. }

  1656. 

  1657. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1658.     int i;

  1659.     int context_count=1;

  1660. 

  1661.     for(i=0; i<5; i++){

  1662.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1663.         if(context_count > 32768U){

  1664.             return -1;

  1665.         }

  1666.     }

  1667.     return (context_count+1)/2;

  1668. }

  1669. 

  1670. static int read_extra_header(FFV1Context *f){

  1671.     RangeCoder * const c= &f->c;

  1672.     uint8_t state[CONTEXT_SIZE];

  1673.     int i, j, k;

  1674.     uint8_t state2[32][CONTEXT_SIZE];

  1675. 

  1676.     memset(state2, 128, sizeof(state2));

  1677.     memset(state, 128, sizeof(state));

  1678. 

  1679.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1680.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1681. 

  1682.     f->version= get_symbol(c, state, 0);

  1683.     if(f->version > 2)

  1684.         f->minor_version= get_symbol(c, state, 0);

  1685.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1686.     if(f->ac>1){

  1687.         for(i=1; i<256; i++){

  1688.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1689.         }

  1690.     }

  1691.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1692.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1693.     f->chroma_planes= get_rac(c, state);

  1694.     f->chroma_h_shift= get_symbol(c, state, 0);

  1695.     f->chroma_v_shift= get_symbol(c, state, 0);

  1696.     f->transparency= get_rac(c, state);

  1697.     f->plane_count= 2 + f->transparency;

  1698.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1699.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1700.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1701.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1702.         return -1;

  1703.     }

  1704. 

  1705.     f->quant_table_count= get_symbol(c, state, 0);

  1706.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1707.         return -1;

  1708.     for(i=0; i<f->quant_table_count; i++){

  1709.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1710.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1711.             return -1;

  1712.         }

  1713.     }

  1714. 

  1715.     if(allocate_initial_states(f) < 0)

  1716.         return AVERROR(ENOMEM);

  1717. 

  1718.     for(i=0; i<f->quant_table_count; i++){

  1719.         if(get_rac(c, state)){

  1720.             for(j=0; j<f->context_count[i]; j++){

  1721.                 for(k=0; k<CONTEXT_SIZE; k++){

  1722.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1723.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1724.                 }

  1725.             }

  1726.         }

  1727.     }

  1728. 

  1729.     if(f->version > 2){

  1730.         unsigned v;

  1731.         v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, f->avctx->extradata, f->avctx->extradata_size);

  1732.         if(v){

  1733.             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);

  1734.             return AVERROR_INVALIDDATA;

  1735.         }

  1736.     }

  1737. 

  1738.     return 0;

  1739. }

  1740. 

  1741. static int read_header(FFV1Context *f){

  1742.     uint8_t state[CONTEXT_SIZE];

  1743.     int i, j, context_count;

  1744.     RangeCoder * const c= &f->slice_context[0]->c;

  1745. 

  1746.     memset(state, 128, sizeof(state));

  1747. 

  1748.     if(f->version < 2){

  1749.         f->version= get_symbol(c, state, 0);

  1750.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1751.         if(f->ac>1){

  1752.             for(i=1; i<256; i++){

  1753.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1754.             }

  1755.         }

  1756.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1757.         if(f->version>0)

  1758.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1759.         f->chroma_planes= get_rac(c, state);

  1760.         f->chroma_h_shift= get_symbol(c, state, 0);

  1761.         f->chroma_v_shift= get_symbol(c, state, 0);

  1762.         f->transparency= get_rac(c, state);

  1763.         f->plane_count= 2 + f->transparency;

  1764.     }

  1765. 

  1766.     if(f->colorspace==0){

  1767.         if(!f->transparency && !f->chroma_planes){

  1768.             if (f->avctx->bits_per_raw_sample<=8)

  1769.                 f->avctx->pix_fmt= PIX_FMT_GRAY8;

  1770.             else

  1771.                 f->avctx->pix_fmt= PIX_FMT_GRAY16;

  1772.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1773.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1774.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1775.             case 0x01: f->avctx->pix_fmt= PIX_FMT_YUV440P; break;

  1776.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1777.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1778.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1779.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1780.             default:

  1781.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1782.                 return -1;

  1783.             }

  1784.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1785.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1786.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUVA444P; break;

  1787.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUVA420P; break;

  1788.             default:

  1789.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1790.                 return -1;

  1791.             }

  1792.         }else if(f->avctx->bits_per_raw_sample==9) {

  1793.             f->packed_at_lsb=1;

  1794.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1795.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P9; break;

  1796.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P9; break;

  1797.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9; break;

  1798.             default:

  1799.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1800.                 return -1;

  1801.             }

  1802.         }else if(f->avctx->bits_per_raw_sample==10) {

  1803.             f->packed_at_lsb=1;

  1804.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1805.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P10; break;

  1806.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; break;

  1807.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; break;

  1808.             default:

  1809.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1810.                 return -1;

  1811.             }

  1812.         }else {

  1813.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1814.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1815.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1816.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1817.             default:

  1818.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1819.                 return -1;

  1820.             }

  1821.         }

  1822.     }else if(f->colorspace==1){

  1823.         if(f->chroma_h_shift || f->chroma_v_shift){

  1824.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1825.             return -1;

  1826.         }

  1827.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1828.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1829.     }else{

  1830.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1831.         return -1;

  1832.     }

  1833. 

  1834. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1835.     if(f->version < 2){

  1836.         context_count= read_quant_tables(c, f->quant_table);

  1837.         if(context_count < 0){

  1838.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1839.                 return -1;

  1840.         }

  1841.     }else{

  1842.         f->slice_count= get_symbol(c, state, 0);

  1843.         if(f->slice_count > (unsigned)MAX_SLICES)

  1844.             return -1;

  1845.     }

  1846. 

  1847.     for(j=0; j<f->slice_count; j++){

  1848.         FFV1Context *fs= f->slice_context[j];

  1849.         fs->ac= f->ac;

  1850.         fs->packed_at_lsb= f->packed_at_lsb;

  1851. 

  1852.         if(f->version == 2){

  1853.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1854.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1855.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1856.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1857. 

  1858.             fs->slice_x /= f->num_h_slices;

  1859.             fs->slice_y /= f->num_v_slices;

  1860.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1861.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1862.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1863.                 return -1;

  1864.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1865.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1866.                 return -1;

  1867.         }

  1868. 

  1869.         for(i=0; i<f->plane_count; i++){

  1870.             PlaneContext * const p= &fs->plane[i];

  1871. 

  1872.             if(f->version == 2){

  1873.                 int idx=get_symbol(c, state, 0);

  1874.                 if(idx > (unsigned)f->quant_table_count){

  1875.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1876.                     return -1;

  1877.                 }

  1878.                 p->quant_table_index= idx;

  1879.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1880.                 context_count= f->context_count[idx];

  1881.             }else{

  1882.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1883.             }

  1884. 

  1885.             if(f->version <= 2){

  1886.             if(p->context_count < context_count){

  1887.                 av_freep(&p->state);

  1888.                 av_freep(&p->vlc_state);

  1889.             }

  1890.             p->context_count= context_count;

  1891.             }

  1892.         }

  1893.     }

  1894.     return 0;

  1895. }

  1896. 

  1897. static av_cold int decode_init(AVCodecContext *avctx)

  1898. {

  1899.     FFV1Context *f = avctx->priv_data;

  1900. 

  1901.     common_init(avctx);

  1902. 

  1903.     if(avctx->extradata && read_extra_header(f) < 0)

  1904.         return -1;

  1905. 

  1906.     if(init_slice_contexts(f) < 0)

  1907.         return -1;

  1908. 

  1909.     return 0;

  1910. }

  1911. 

  1912. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1913.     const uint8_t *buf = avpkt->data;

  1914.     int buf_size = avpkt->size;

  1915.     FFV1Context *f = avctx->priv_data;

  1916.     RangeCoder * const c= &f->slice_context[0]->c;

  1917.     AVFrame * const p= &f->picture;

  1918.     int bytes_read, i;

  1919.     uint8_t keystate= 128;

  1920.     const uint8_t *buf_p;

  1921. 

  1922.     AVFrame *picture = data;

  1923. 

  1924.     /* release previously stored data */

  1925.     if (p->data[0])

  1926.         avctx->release_buffer(avctx, p);

  1927. 

  1928.     ff_init_range_decoder(c, buf, buf_size);

  1929.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1930. 

  1931. 

  1932.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1933.     if(get_rac(c, &keystate)){

  1934.         p->key_frame= 1;

  1935.         if(read_header(f) < 0)

  1936.             return -1;

  1937.         if(init_slices_state(f) < 0)

  1938.             return -1;

  1939.     }else{

  1940.         p->key_frame= 0;

  1941.     }

  1942.     if(f->ac>1){

  1943.         int i;

  1944.         for(i=1; i<256; i++){

  1945.             c->one_state[i]= f->state_transition[i];

  1946.             c->zero_state[256-i]= 256-c->one_state[i];

  1947.         }

  1948.     }

  1949. 

  1950.     p->reference= 0;

  1951.     if(avctx->get_buffer(avctx, p) < 0){

  1952.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1953.         return -1;

  1954.     }

  1955. 

  1956.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1957.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1958. 

  1959.     buf_p= buf + buf_size;

  1960.     for(i=f->slice_count-1; i>=0; i--){

  1961.         FFV1Context *fs= f->slice_context[i];

  1962.         int v;

  1963. 

  1964.         if(i) v = AV_RB24(buf_p-3)+3;

  1965.         else  v = buf_p - c->bytestream_start;

  1966.         if(buf_p - c->bytestream_start < v){

  1967.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1968.             return -1;

  1969.         }

  1970.         buf_p -= v;

  1971. 

  1972.         if(i){

  1973.             if(fs->ac){

  1974.                 ff_init_range_decoder(&fs->c, buf_p, v);

  1975.             }else{

  1976.                 init_get_bits(&fs->gb, buf_p, v * 8);

  1977.             }

  1978.         }else{

  1979.             if(!f->ac){

  1980.                 bytes_read = c->bytestream - c->bytestream_start - 1;

  1981.                 if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1982.                 init_get_bits(&fs->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1983.             }

  1984.         }

  1985.     }

  1986. 

  1987.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1988.     f->picture_number++;

  1989. 

  1990.     *picture= *p;

  1991.     *data_size = sizeof(AVFrame);

  1992. 

  1993.     return buf_size;

  1994. }

  1995. 

  1996. AVCodec ff_ffv1_decoder = {

  1997.     .name           = "ffv1",

  1998.     .type           = AVMEDIA_TYPE_VIDEO,

  1999.     .id             = CODEC_ID_FFV1,

  2000.     .priv_data_size = sizeof(FFV1Context),

  2001.     .init           = decode_init,

  2002.     .close          = common_end,

  2003.     .decode         = decode_frame,

  2004.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |

  2005.                       CODEC_CAP_SLICE_THREADS,

  2006.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2007. };

  2008. 

  2009. #if CONFIG_FFV1_ENCODER

  2010. AVCodec ff_ffv1_encoder = {

  2011.     .name           = "ffv1",

  2012.     .type           = AVMEDIA_TYPE_VIDEO,

  2013.     .id             = CODEC_ID_FFV1,

  2014.     .priv_data_size = sizeof(FFV1Context),

  2015.     .init           = encode_init,

  2016.     .encode2        = encode_frame,

  2017.     .close          = common_end,

  2018.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  2019.     .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_YUV444P9, PIX_FMT_YUV422P9, PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_YUV444P10, PIX_FMT_GRAY16, PIX_FMT_GRAY8, PIX_FMT_NONE},

  2020.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2021. };

  2022. #endif