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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

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

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "internal.h"

  30. #include "get_bits.h"

  31. #include "put_bits.h"

  32. #include "dsputil.h"

  33. #include "rangecoder.h"

  34. #include "golomb.h"

  35. #include "mathops.h"

  36. #include "libavutil/pixdesc.h"

  37. #include "libavutil/avassert.h"

  38. #include "libavutil/crc.h"

  39. #include "libavutil/opt.h"

  40. #include "libavutil/imgutils.h"

  41. 

  42. #ifdef __INTEL_COMPILER

  43. #undef av_flatten

  44. #define av_flatten

  45. #endif

  46. 

  47. #define MAX_PLANES 4

  48. #define CONTEXT_SIZE 32

  49. 

  50. #define MAX_QUANT_TABLES 8

  51. #define MAX_CONTEXT_INPUTS 5

  52. 

  53. extern const uint8_t ff_log2_run[41];

  54. 

  55. static const int8_t quant5_10bit[256]={

  56.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

  57.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  58.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  59.  1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

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

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

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

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

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

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

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

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

  68. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

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

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

  71. -1,-1,-1,-1,-1,-1,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  72. };

  73. 

  74. static const int8_t quant5[256]={

  75.  0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  76.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  77.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

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

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

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

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

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

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

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

  85. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  86. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  87. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  88. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  89. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  90. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,

  91. };

  92. 

  93. static const int8_t quant9_10bit[256]={

  94.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  95.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

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

  97.  3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

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

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

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

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

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

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

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

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

  106. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,

  107. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  108. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  109. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  110. };

  111. 

  112. static const int8_t quant11[256]={

  113.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

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

  115.  4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

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

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

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

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

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

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

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

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

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

  125. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,

  126. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,

  127. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  128. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  129. };

  130. 

  131. static const uint8_t ver2_state[256]= {

  132.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  133.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  134.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  135.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  136.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  137.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  138.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  139.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

  140.  165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  141.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  142.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  143.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  144.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  145.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  146.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  147.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  148. };

  149. 

  150. typedef struct VlcState{

  151.     int16_t drift;

  152.     uint16_t error_sum;

  153.     int8_t bias;

  154.     uint8_t count;

  155. } VlcState;

  156. 

  157. typedef struct PlaneContext{

  158.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  159.     int quant_table_index;

  160.     int context_count;

  161.     uint8_t (*state)[CONTEXT_SIZE];

  162.     VlcState *vlc_state;

  163.     uint8_t interlace_bit_state[2];

  164. } PlaneContext;

  165. 

  166. #define MAX_SLICES 256

  167. 

  168. typedef struct FFV1Context{

  169.     AVClass *class;

  170.     AVCodecContext *avctx;

  171.     RangeCoder c;

  172.     GetBitContext gb;

  173.     PutBitContext pb;

  174.     uint64_t rc_stat[256][2];

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

  176.     int version;

  177.     int minor_version;

  178.     int width, height;

  179.     int chroma_h_shift, chroma_v_shift;

  180.     int chroma_planes;

  181.     int transparency;

  182.     int flags;

  183.     int picture_number;

  184.     AVFrame picture;

  185.     AVFrame last_picture;

  186.     int plane_count;

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

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

  189.     PlaneContext plane[MAX_PLANES];

  190.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  192.     int context_count[MAX_QUANT_TABLES];

  193.     uint8_t state_transition[256];

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

  195.     int run_index;

  196.     int colorspace;

  197.     int16_t *sample_buffer;

  198.     int gob_count;

  199.     int packed_at_lsb;

  200.     int ec;

  201.     int slice_damaged;

  202.     int key_frame_ok;

  203. 

  204.     int quant_table_count;

  205. 

  206.     DSPContext dsp;

  207. 

  208.     struct FFV1Context *slice_context[MAX_SLICES];

  209.     int slice_count;

  210.     int num_v_slices;

  211.     int num_h_slices;

  212.     int slice_width;

  213.     int slice_height;

  214.     int slice_x;

  215.     int slice_y;

  216.     int bits_per_raw_sample;

  217. }FFV1Context;

  218. 

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

  220.     if(bits==8)

  221.         diff= (int8_t)diff;

  222.     else{

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

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

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

  226.     }

  227. 

  228.     return diff;

  229. }

  230. 

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

  232. {

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

  234.     const int  T= last[ 0];

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

  236. 

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

  238. }

  239. 

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

  241.                               int16_t *last, int16_t *last2)

  242. {

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

  244.     const int  T= last[ 0];

  245.     const int RT= last[ 1];

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

  247. 

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

  249.         const int TT= last2[0];

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

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

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

  253.     }else

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

  255. }

  256. 

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

  258.     int i,j,k,m;

  259.     double l2tab[256];

  260. 

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

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

  263. 

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

  265.         double best_len[256];

  266.         double p= i/256.0;

  267. 

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

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

  270. 

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

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

  273.             double len=0;

  274.             occ[j]=1.0;

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

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

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

  278.                     if(occ[m]){

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

  280.                                       + (1-p)*l2tab[256-m]);

  281.                     }

  282.                 }

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

  284.                     best_len[k]= len;

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

  286.                 }

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

  288.                     if(occ[m]){

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

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

  291.                     }

  292.                 }

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

  294.             }

  295.         }

  296.     }

  297. }

  298. 

  299. 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]){

  300.     int i;

  301. 

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

  303. do{\

  304.     if(rc_stat){\

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

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

  307.     }\

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

  309. }while(0)

  310. 

  311.     if(v){

  312.         const int a= FFABS(v);

  313.         const int e= av_log2(a);

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

  315.         if(e<=9){

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

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

  318.             }

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

  320. 

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

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

  323.             }

  324. 

  325.             if(is_signed)

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

  327.         }else{

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

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

  330.             }

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

  332. 

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

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

  335.             }

  336. 

  337.             if(is_signed)

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

  339.         }

  340.     }else{

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

  342.     }

  343. #undef put_rac

  344. }

  345. 

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

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

  348. }

  349. 

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

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

  352.         return 0;

  353.     else{

  354.         int i, e, a;

  355.         e= 0;

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

  357.             e++;

  358.         }

  359. 

  360.         a= 1;

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

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

  363.         }

  364. 

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

  366.         return (a^e)-e;

  367.     }

  368. }

  369. 

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

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

  372. }

  373. 

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

  375.     int drift= state->drift;

  376.     int count= state->count;

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

  378.     drift += v;

  379. 

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

  381.         count >>= 1;

  382.         drift >>= 1;

  383.         state->error_sum >>= 1;

  384.     }

  385.     count++;

  386. 

  387.     if(drift <= -count){

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

  389. 

  390.         drift += count;

  391.         if(drift <= -count)

  392.             drift= -count + 1;

  393.     }else if(drift > 0){

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

  395. 

  396.         drift -= count;

  397.         if(drift > 0)

  398.             drift= 0;

  399.     }

  400. 

  401.     state->drift= drift;

  402.     state->count= count;

  403. }

  404. 

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

  406.     int i, k, code;

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

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

  409. 

  410.     i= state->count;

  411.     k=0;

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

  413.         k++;

  414.         i += i;

  415.     }

  416. 

  417.     assert(k<=8);

  418. 

  419. #if 0 // JPEG LS

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

  421.     else                                         code= v;

  422. #else

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

  424. #endif

  425. 

  426. //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);

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

  428. 

  429.     update_vlc_state(state, v);

  430. }

  431. 

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

  433.     int k, i, v, ret;

  434. 

  435.     i= state->count;

  436.     k=0;

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

  438.         k++;

  439.         i += i;

  440.     }

  441. 

  442.     assert(k<=8);

  443. 

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

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

  446. 

  447. #if 0 // JPEG LS

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

  449. #else

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

  451. #endif

  452. 

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

  454. 

  455.     update_vlc_state(state, v);

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

  457.     return ret;

  458. }

  459. 

  460. #if CONFIG_FFV1_ENCODER

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

  462.                                         int16_t *sample[3],

  463.                                         int plane_index, int bits)

  464. {

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

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

  467.     int x;

  468.     int run_index= s->run_index;

  469.     int run_count=0;

  470.     int run_mode=0;

  471. 

  472.     if(s->ac){

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

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

  475.             return -1;

  476.         }

  477.     }else{

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

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

  480.             return -1;

  481.         }

  482.     }

  483. 

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

  485.         int diff, context;

  486. 

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

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

  489. 

  490.         if(context < 0){

  491.             context = -context;

  492.             diff= -diff;

  493.         }

  494. 

  495.         diff= fold(diff, bits);

  496. 

  497.         if(s->ac){

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

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

  500.             }else{

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

  502.             }

  503.         }else{

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

  505. 

  506.             if(run_mode){

  507. 

  508.                 if(diff){

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

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

  511.                         run_index++;

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

  513.                     }

  514. 

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

  516.                     if(run_index) run_index--;

  517.                     run_count=0;

  518.                     run_mode=0;

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

  520.                 }else{

  521.                     run_count++;

  522.                 }

  523.             }

  524. 

  525. //            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));

  526. 

  527.             if(run_mode == 0)

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

  529.         }

  530.     }

  531.     if(run_mode){

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

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

  534.             run_index++;

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

  536.         }

  537. 

  538.         if(run_count)

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

  540.     }

  541.     s->run_index= run_index;

  542. 

  543.     return 0;

  544. }

  545. 

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

  547.     int x,y,i;

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

  549.     int16_t *sample[3];

  550.     s->run_index=0;

  551. 

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

  553. 

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

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

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

  557. 

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

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

  560. //{START_TIMER

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

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

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

  564.             }

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

  566.         }else{

  567.             if(s->packed_at_lsb){

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

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

  570.                 }

  571.             }else{

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

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

  574.                 }

  575.             }

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

  577.         }

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

  579.     }

  580. }

  581. 

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

  583.     int x, y, p, i;

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

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

  586.     s->run_index=0;

  587. 

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

  589. 

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

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

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

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

  594. 

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

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

  597.             int b= v&0xFF;

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

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

  600.             int a=  v>>24;

  601. 

  602.             b -= g;

  603.             r -= g;

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

  605.             b += 0x100;

  606.             r += 0x100;

  607. 

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

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

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

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

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

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

  614.         }

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

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

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

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

  619.         }

  620.     }

  621. }

  622. 

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

  624.     int last=0;

  625.     int i;

  626.     uint8_t state[CONTEXT_SIZE];

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

  628. 

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

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

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

  632.             last= i;

  633.         }

  634.     }

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

  636. }

  637. 

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

  639.     int i;

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

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

  642. }

  643. 

  644. static void write_header(FFV1Context *f){

  645.     uint8_t state[CONTEXT_SIZE];

  646.     int i, j;

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

  648. 

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

  650. 

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

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

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

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

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

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

  657.             }

  658.         }

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

  660.         if(f->version>0)

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

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

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

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

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

  666. 

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

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

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

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

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

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

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

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

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

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

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

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

  679.             }

  680.         }

  681.     }

  682. }

  683. #endif /* CONFIG_FFV1_ENCODER */

  684. 

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

  686.     FFV1Context *s = avctx->priv_data;

  687. 

  688.     s->avctx= avctx;

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

  690. 

  691.     avcodec_get_frame_defaults(&s->picture);

  692. 

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

  694. 

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

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

  697. 

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

  699.     //defaults

  700.     s->num_h_slices=1;

  701.     s->num_v_slices=1;

  702. 

  703. 

  704.     return 0;

  705. }

  706. 

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

  708.     int j;

  709. 

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

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

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

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

  714. 

  715.             if(fs->ac){

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

  717.                 if(!p->    state)

  718.                     return AVERROR(ENOMEM);

  719.             }else{

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

  721.                 if(!p->vlc_state)

  722.                     return AVERROR(ENOMEM);

  723.             }

  724.         }

  725. 

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

  727.             //FIXME only redo if state_transition changed

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

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

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

  731.             }

  732.         }

  733. 

  734.     return 0;

  735. }

  736. 

  737. static int init_slices_state(FFV1Context *f){

  738.     int i;

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

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

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

  742.             return -1;

  743.     }

  744.     return 0;

  745. }

  746. 

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

  748.     int i;

  749. 

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

  751. 

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

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

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

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

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

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

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

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

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

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

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

  763. 

  764.         fs->slice_width = sxe - sxs;

  765.         fs->slice_height= sye - sys;

  766.         fs->slice_x     = sxs;

  767.         fs->slice_y     = sys;

  768. 

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

  770.         if (!fs->sample_buffer)

  771.             return AVERROR(ENOMEM);

  772.     }

  773.     return 0;

  774. }

  775. 

  776. static int allocate_initial_states(FFV1Context *f){

  777.     int i;

  778. 

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

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

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

  782.             return AVERROR(ENOMEM);

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

  784.     }

  785.     return 0;

  786. }

  787. 

  788. #if CONFIG_FFV1_ENCODER

  789. static int write_extra_header(FFV1Context *f){

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

  791.     uint8_t state[CONTEXT_SIZE];

  792.     int i, j, k;

  793.     uint8_t state2[32][CONTEXT_SIZE];

  794.     unsigned v;

  795. 

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

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

  798. 

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

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

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

  802. 

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

  804.     if(f->version > 2)

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

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

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

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

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

  810.         }

  811.     }

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

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

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

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

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

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

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

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

  820. 

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

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

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

  824. 

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

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

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

  828.                 break;

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

  830.             put_rac(c, state, 1);

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

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

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

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

  835.                 }

  836.             }

  837.         }else{

  838.             put_rac(c, state, 0);

  839.         }

  840.     }

  841. 

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

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

  844.     }

  845. 

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

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

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

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

  850. 

  851.     return 0;

  852. }

  853. 

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

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

  856. 

  857.     do{

  858.         changed=0;

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

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

  861. #define COST(old, new) \

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

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

  864. 

  865. #define COST2(old, new) \

  866.     COST(old, new)\

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

  868. 

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

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

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

  872.                     int j;

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

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

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

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

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

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

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

  880.                     }

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

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

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

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

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

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

  887.                         }

  888.                     }

  889.                     print=changed=1;

  890.                 }

  891.             }

  892.         }

  893.     }while(changed);

  894.     return print;

  895. }

  896. 

  897. static av_cold int encode_init(AVCodecContext *avctx)

  898. {

  899.     FFV1Context *s = avctx->priv_data;

  900.     int i, j, k, m;

  901. 

  902.     common_init(avctx);

  903. 

  904.     s->version=0;

  905. 

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

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

  908. 

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

  910.         s->version = 3;

  911.     }

  912. 

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

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

  915.     }

  916. 

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

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

  919.         return AVERROR_INVALIDDATA;

  920.     }

  921. 

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

  923. 

  924.     s->plane_count=3;

  925.     switch(avctx->pix_fmt){

  926.     case PIX_FMT_YUV444P9:

  927.     case PIX_FMT_YUV422P9:

  928.     case PIX_FMT_YUV420P9:

  929.         if (!avctx->bits_per_raw_sample)

  930.             s->bits_per_raw_sample = 9;

  931.     case PIX_FMT_YUV444P10:

  932.     case PIX_FMT_YUV420P10:

  933.     case PIX_FMT_YUV422P10:

  934.         s->packed_at_lsb = 1;

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

  936.             s->bits_per_raw_sample = 10;

  937.     case PIX_FMT_GRAY16:

  938.     case PIX_FMT_YUV444P16:

  939.     case PIX_FMT_YUV422P16:

  940.     case PIX_FMT_YUV420P16:

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

  942.             s->bits_per_raw_sample = 16;

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

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

  945.         }

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

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

  948.             return AVERROR_INVALIDDATA;

  949.         }

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

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

  952.             s->ac = 2;

  953.         }

  954.         if(!s->ac){

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

  956.             return AVERROR_INVALIDDATA;

  957.         }

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

  959.     case PIX_FMT_GRAY8:

  960.     case PIX_FMT_YUV444P:

  961.     case PIX_FMT_YUV440P:

  962.     case PIX_FMT_YUV422P:

  963.     case PIX_FMT_YUV420P:

  964.     case PIX_FMT_YUV411P:

  965.     case PIX_FMT_YUV410P:

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

  967.         s->colorspace= 0;

  968.         break;

  969.     case PIX_FMT_YUVA444P:

  970.     case PIX_FMT_YUVA422P:

  971.     case PIX_FMT_YUVA420P:

  972.         s->chroma_planes= 1;

  973.         s->colorspace= 0;

  974.         s->transparency= 1;

  975.         break;

  976.     case PIX_FMT_RGB32:

  977.         s->colorspace= 1;

  978.         s->transparency= 1;

  979.         break;

  980.     case PIX_FMT_0RGB32:

  981.         s->colorspace= 1;

  982.         break;

  983.     default:

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

  985.         return AVERROR_INVALIDDATA;

  986.     }

  987.     if (s->transparency) {

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

  989.     }

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

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

  992.         return AVERROR(EINVAL);

  993.     }

  994. 

  995.     if(s->ac>1)

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

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

  998. 

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

  1000.         s->quant_table_count=2;

  1001.         if(s->bits_per_raw_sample <=8){

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

  1003.             s->quant_tables[0][1][i]=        11*quant11[i];

  1004.             s->quant_tables[0][2][i]=     11*11*quant11[i];

  1005.             s->quant_tables[1][0][i]=           quant11[i];

  1006.             s->quant_tables[1][1][i]=        11*quant11[i];

  1007.             s->quant_tables[1][2][i]=     11*11*quant5 [i];

  1008.             s->quant_tables[1][3][i]=   5*11*11*quant5 [i];

  1009.             s->quant_tables[1][4][i]= 5*5*11*11*quant5 [i];

  1010.         }else{

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

  1012.             s->quant_tables[0][1][i]=        11*quant9_10bit[i];

  1013.             s->quant_tables[0][2][i]=     11*11*quant9_10bit[i];

  1014.             s->quant_tables[1][0][i]=           quant9_10bit[i];

  1015.             s->quant_tables[1][1][i]=        11*quant9_10bit[i];

  1016.             s->quant_tables[1][2][i]=     11*11*quant5_10bit[i];

  1017.             s->quant_tables[1][3][i]=   5*11*11*quant5_10bit[i];

  1018.             s->quant_tables[1][4][i]= 5*5*11*11*quant5_10bit[i];

  1019.         }

  1020.     }

  1021.     s->context_count[0]= (11*11*11+1)/2;

  1022.     s->context_count[1]= (11*11*5*5*5+1)/2;

  1023.     memcpy(s->quant_table, s->quant_tables[avctx->context_model], sizeof(s->quant_table));

  1024. 

  1025.     for(i=0; i<s->plane_count; i++){

  1026.         PlaneContext * const p= &s->plane[i];

  1027. 

  1028.         memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));

  1029.         p->quant_table_index= avctx->context_model;

  1030.         p->context_count= s->context_count[p->quant_table_index];

  1031.     }

  1032. 

  1033.     if(allocate_initial_states(s) < 0)

  1034.         return AVERROR(ENOMEM);

  1035. 

  1036.     avctx->coded_frame= &s->picture;

  1037.     if(!s->transparency)

  1038.         s->plane_count= 2;

  1039.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  1040. 

  1041.     s->picture_number=0;

  1042. 

  1043.     if(avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  1044.         for(i=0; i<s->quant_table_count; i++){

  1045.             s->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*s->rc_stat2[i]));

  1046.             if(!s->rc_stat2[i])

  1047.                 return AVERROR(ENOMEM);

  1048.         }

  1049.     }

  1050.     if(avctx->stats_in){

  1051.         char *p= avctx->stats_in;

  1052.         uint8_t best_state[256][256];

  1053.         int gob_count=0;

  1054.         char *next;

  1055. 

  1056.         av_assert0(s->version>=2);

  1057. 

  1058.         for(;;){

  1059.             for(j=0; j<256; j++){

  1060.                 for(i=0; i<2; i++){

  1061.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1062.                     if(next==p){

  1063.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1064.                         return -1;

  1065.                     }

  1066.                     p=next;

  1067.                 }

  1068.             }

  1069.             for(i=0; i<s->quant_table_count; i++){

  1070.                 for(j=0; j<s->context_count[i]; j++){

  1071.                     for(k=0; k<32; k++){

  1072.                         for(m=0; m<2; m++){

  1073.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1074.                             if(next==p){

  1075.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1076.                                 return AVERROR_INVALIDDATA;

  1077.                             }

  1078.                             p=next;

  1079.                         }

  1080.                     }

  1081.                 }

  1082.             }

  1083.             gob_count= strtol(p, &next, 0);

  1084.             if(next==p || gob_count <0){

  1085.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1086.                 return AVERROR_INVALIDDATA;

  1087.             }

  1088.             p=next;

  1089.             while(*p=='\n' || *p==' ') p++;

  1090.             if(p[0]==0) break;

  1091.         }

  1092.         sort_stt(s, s->state_transition);

  1093. 

  1094.         find_best_state(best_state, s->state_transition);

  1095. 

  1096.         for(i=0; i<s->quant_table_count; i++){

  1097.             for(j=0; j<s->context_count[i]; j++){

  1098.                 for(k=0; k<32; k++){

  1099.                     double p= 128;

  1100.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1101.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1102.                     }

  1103.                     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)];

  1104.                 }

  1105.             }

  1106.         }

  1107.     }

  1108. 

  1109.     if(s->version>1){

  1110.         for(s->num_v_slices=2; s->num_v_slices<9; s->num_v_slices++){

  1111.             for(s->num_h_slices=s->num_v_slices; s->num_h_slices<2*s->num_v_slices; s->num_h_slices++){

  1112.                 if(avctx->slices == s->num_h_slices * s->num_v_slices && avctx->slices <= 64 || !avctx->slices)

  1113.                     goto slices_ok;

  1114.             }

  1115.         }

  1116.         av_log(avctx, AV_LOG_ERROR, "Unsupported number %d of slices requested, please specify a supported number with -slices (ex:4,6,9,12,16, ...)\n", avctx->slices);

  1117.         return -1;

  1118.         slices_ok:

  1119.         write_extra_header(s);

  1120.     }

  1121. 

  1122.     if(init_slice_contexts(s) < 0)

  1123.         return -1;

  1124.     if(init_slices_state(s) < 0)

  1125.         return -1;

  1126. 

  1127. #define STATS_OUT_SIZE 1024*1024*6

  1128.     if(avctx->flags & CODEC_FLAG_PASS1){

  1129.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1130.         for(i=0; i<s->quant_table_count; i++){

  1131.             for(j=0; j<s->slice_count; j++){

  1132.                 FFV1Context *sf= s->slice_context[j];

  1133.                 av_assert0(!sf->rc_stat2[i]);

  1134.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1135.                 if(!sf->rc_stat2[i])

  1136.                     return AVERROR(ENOMEM);

  1137.             }

  1138.         }

  1139.     }

  1140. 

  1141.     return 0;

  1142. }

  1143. #endif /* CONFIG_FFV1_ENCODER */

  1144. 

  1145. 

  1146. static void clear_slice_state(FFV1Context *f, FFV1Context *fs){

  1147.     int i, j;

  1148. 

  1149.         for(i=0; i<f->plane_count; i++){

  1150.             PlaneContext *p= &fs->plane[i];

  1151. 

  1152.             p->interlace_bit_state[0]= 128;

  1153.             p->interlace_bit_state[1]= 128;

  1154. 

  1155.             if(fs->ac){

  1156.                 if(f->initial_states[p->quant_table_index]){

  1157.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1158.                 }else

  1159.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1160.             }else{

  1161.                 for(j=0; j<p->context_count; j++){

  1162.                     p->vlc_state[j].drift= 0;

  1163.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1164.                     p->vlc_state[j].bias= 0;

  1165.                     p->vlc_state[j].count= 1;

  1166.                 }

  1167.             }

  1168.         }

  1169. }

  1170. 

  1171. #if CONFIG_FFV1_ENCODER

  1172. 

  1173. static void encode_slice_header(FFV1Context *f, FFV1Context *fs){

  1174.     RangeCoder *c = &fs->c;

  1175.     uint8_t state[CONTEXT_SIZE];

  1176.     int j;

  1177.     memset(state, 128, sizeof(state));

  1178. 

  1179.     put_symbol(c, state, (fs->slice_x     +1)*f->num_h_slices / f->width   , 0);

  1180.     put_symbol(c, state, (fs->slice_y     +1)*f->num_v_slices / f->height  , 0);

  1181.     put_symbol(c, state, (fs->slice_width +1)*f->num_h_slices / f->width -1, 0);

  1182.     put_symbol(c, state, (fs->slice_height+1)*f->num_v_slices / f->height-1, 0);

  1183.     for(j=0; j<f->plane_count; j++){

  1184.         put_symbol(c, state, f->plane[j].quant_table_index, 0);

  1185.         av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);

  1186.     }

  1187.     if(!f->picture.interlaced_frame) put_symbol(c, state, 3, 0);

  1188.     else                             put_symbol(c, state, 1 + !f->picture.top_field_first, 0);

  1189.     put_symbol(c, state, f->picture.sample_aspect_ratio.num, 0);

  1190.     put_symbol(c, state, f->picture.sample_aspect_ratio.den, 0);

  1191. }

  1192. 

  1193. static int encode_slice(AVCodecContext *c, void *arg){

  1194.     FFV1Context *fs= *(void**)arg;

  1195.     FFV1Context *f= fs->avctx->priv_data;

  1196.     int width = fs->slice_width;

  1197.     int height= fs->slice_height;

  1198.     int x= fs->slice_x;

  1199.     int y= fs->slice_y;

  1200.     AVFrame * const p= &f->picture;

  1201.     const int ps= (f->bits_per_raw_sample>8)+1;

  1202. 

  1203.     if(p->key_frame)

  1204.         clear_slice_state(f, fs);

  1205.     if(f->version > 2){

  1206.         encode_slice_header(f, fs);

  1207.     }

  1208.     if(!fs->ac){

  1209.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? ff_rac_terminate(&fs->c) : 0;

  1210.         init_put_bits(&fs->pb, fs->c.bytestream_start + fs->ac_byte_count, fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  1211.     }

  1212. 

  1213.     if(f->colorspace==0){

  1214.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1215.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1216.         const int cx= x>>f->chroma_h_shift;

  1217.         const int cy= y>>f->chroma_v_shift;

  1218. 

  1219.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1220. 

  1221.         if (f->chroma_planes){

  1222.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1223.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1224.         }

  1225.         if (fs->transparency)

  1226.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1227.     }else{

  1228.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1229.     }

  1230.     emms_c();

  1231. 

  1232.     return 0;

  1233. }

  1234. 

  1235. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1236.                         const AVFrame *pict, int *got_packet)

  1237. {

  1238.     FFV1Context *f = avctx->priv_data;

  1239.     RangeCoder * const c= &f->slice_context[0]->c;

  1240.     AVFrame * const p= &f->picture;

  1241.     int used_count= 0;

  1242.     uint8_t keystate=128;

  1243.     uint8_t *buf_p;

  1244.     int i, ret;

  1245. 

  1246.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1247.                                   + FF_MIN_BUFFER_SIZE)) < 0)

  1248.         return ret;

  1249. 

  1250.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1251.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1252. 

  1253.     *p = *pict;

  1254.     p->pict_type= AV_PICTURE_TYPE_I;

  1255. 

  1256.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1257.         put_rac(c, &keystate, 1);

  1258.         p->key_frame= 1;

  1259.         f->gob_count++;

  1260.         write_header(f);

  1261.     }else{

  1262.         put_rac(c, &keystate, 0);

  1263.         p->key_frame= 0;

  1264.     }

  1265. 

  1266.     if (f->ac>1){

  1267.         int i;

  1268.         for(i=1; i<256; i++){

  1269.             c->one_state[i]= f->state_transition[i];

  1270.             c->zero_state[256-i]= 256-c->one_state[i];

  1271.         }

  1272.     }

  1273. 

  1274.     for(i=1; i<f->slice_count; i++){

  1275.         FFV1Context *fs= f->slice_context[i];

  1276.         uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;

  1277.         int len = pkt->size/f->slice_count;

  1278. 

  1279.         ff_init_range_encoder(&fs->c, start, len);

  1280.     }

  1281.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1282. 

  1283.     buf_p = pkt->data;

  1284.     for(i=0; i<f->slice_count; i++){

  1285.         FFV1Context *fs= f->slice_context[i];

  1286.         int bytes;

  1287. 

  1288.         if(fs->ac){

  1289.             uint8_t state=128;

  1290.             put_rac(&fs->c, &state, 0);

  1291.             bytes= ff_rac_terminate(&fs->c);

  1292.         }else{

  1293.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1294.             bytes= fs->ac_byte_count + (put_bits_count(&fs->pb)+7)/8;

  1295.         }

  1296.         if(i>0 || f->version>2){

  1297.             av_assert0(bytes < pkt->size/f->slice_count);

  1298.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1299.             av_assert0(bytes < (1<<24));

  1300.             AV_WB24(buf_p+bytes, bytes);

  1301.             bytes+=3;

  1302.         }

  1303.         if(f->ec){

  1304.             unsigned v;

  1305.             buf_p[bytes++] = 0;

  1306.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1307.             AV_WL32(buf_p + bytes, v); bytes += 4;

  1308.         }

  1309.         buf_p += bytes;

  1310.     }

  1311. 

  1312.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1313.         int j, k, m;

  1314.         char *p= avctx->stats_out;

  1315.         char *end= p + STATS_OUT_SIZE;

  1316. 

  1317.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1318.         for(i=0; i<f->quant_table_count; i++)

  1319.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1320. 

  1321.         for(j=0; j<f->slice_count; j++){

  1322.             FFV1Context *fs= f->slice_context[j];

  1323.             for(i=0; i<256; i++){

  1324.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1325.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1326.             }

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

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

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

  1330.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1331.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1332.                     }

  1333.                 }

  1334.             }

  1335.         }

  1336. 

  1337.         for(j=0; j<256; j++){

  1338.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1339.             p+= strlen(p);

  1340.         }

  1341.         snprintf(p, end-p, "\n");

  1342. 

  1343.         for(i=0; i<f->quant_table_count; i++){

  1344.             for(j=0; j<f->context_count[i]; j++){

  1345.                 for(m=0; m<32; m++){

  1346.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1347.                     p+= strlen(p);

  1348.                 }

  1349.             }

  1350.         }

  1351.         snprintf(p, end-p, "%d\n", f->gob_count);

  1352.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1353.         avctx->stats_out[0] = '\0';

  1354. 

  1355.     f->picture_number++;

  1356.     pkt->size   = buf_p - pkt->data;

  1357.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1358.     *got_packet = 1;

  1359. 

  1360.     return 0;

  1361. }

  1362. #endif /* CONFIG_FFV1_ENCODER */

  1363. 

  1364. static av_cold int common_end(AVCodecContext *avctx){

  1365.     FFV1Context *s = avctx->priv_data;

  1366.     int i, j;

  1367. 

  1368.     if (avctx->codec->decode && s->picture.data[0])

  1369.         avctx->release_buffer(avctx, &s->picture);

  1370.     if (avctx->codec->decode && s->last_picture.data[0])

  1371.         avctx->release_buffer(avctx, &s->last_picture);

  1372. 

  1373.     for(j=0; j<s->slice_count; j++){

  1374.         FFV1Context *fs= s->slice_context[j];

  1375.         for(i=0; i<s->plane_count; i++){

  1376.             PlaneContext *p= &fs->plane[i];

  1377. 

  1378.             av_freep(&p->state);

  1379.             av_freep(&p->vlc_state);

  1380.         }

  1381.         av_freep(&fs->sample_buffer);

  1382.     }

  1383. 

  1384.     av_freep(&avctx->stats_out);

  1385.     for(j=0; j<s->quant_table_count; j++){

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

  1387.         for(i=0; i<s->slice_count; i++){

  1388.             FFV1Context *sf= s->slice_context[i];

  1389.             av_freep(&sf->rc_stat2[j]);

  1390.         }

  1391.         av_freep(&s->rc_stat2[j]);

  1392.     }

  1393. 

  1394.     for(i=0; i<s->slice_count; i++){

  1395.         av_freep(&s->slice_context[i]);

  1396.     }

  1397. 

  1398.     return 0;

  1399. }

  1400. 

  1401. static av_always_inline void decode_line(FFV1Context *s, int w,

  1402.                                          int16_t *sample[2],

  1403.                                          int plane_index, int bits)

  1404. {

  1405.     PlaneContext * const p= &s->plane[plane_index];

  1406.     RangeCoder * const c= &s->c;

  1407.     int x;

  1408.     int run_count=0;

  1409.     int run_mode=0;

  1410.     int run_index= s->run_index;

  1411. 

  1412.     for(x=0; x<w; x++){

  1413.         int diff, context, sign;

  1414. 

  1415.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1416.         if(context < 0){

  1417.             context= -context;

  1418.             sign=1;

  1419.         }else

  1420.             sign=0;

  1421. 

  1422.         av_assert2(context < p->context_count);

  1423. 

  1424.         if(s->ac){

  1425.             diff= get_symbol_inline(c, p->state[context], 1);

  1426.         }else{

  1427.             if(context == 0 && run_mode==0) run_mode=1;

  1428. 

  1429.             if(run_mode){

  1430.                 if(run_count==0 && run_mode==1){

  1431.                     if(get_bits1(&s->gb)){

  1432.                         run_count = 1<<ff_log2_run[run_index];

  1433.                         if(x + run_count <= w) run_index++;

  1434.                     }else{

  1435.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1436.                         else run_count=0;

  1437.                         if(run_index) run_index--;

  1438.                         run_mode=2;

  1439.                     }

  1440.                 }

  1441.                 run_count--;

  1442.                 if(run_count < 0){

  1443.                     run_mode=0;

  1444.                     run_count=0;

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

  1446.                     if(diff>=0) diff++;

  1447.                 }else

  1448.                     diff=0;

  1449.             }else

  1450.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1451. 

  1452. //            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));

  1453.         }

  1454. 

  1455.         if(sign) diff= -diff;

  1456. 

  1457.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1458.     }

  1459.     s->run_index= run_index;

  1460. }

  1461. 

  1462. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1463.     int x, y;

  1464.     int16_t *sample[2];

  1465.     sample[0]=s->sample_buffer    +3;

  1466.     sample[1]=s->sample_buffer+w+6+3;

  1467. 

  1468.     s->run_index=0;

  1469. 

  1470.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1471. 

  1472.     for(y=0; y<h; y++){

  1473.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1474. 

  1475.         sample[0]= sample[1];

  1476.         sample[1]= temp;

  1477. 

  1478.         sample[1][-1]= sample[0][0  ];

  1479.         sample[0][ w]= sample[0][w-1];

  1480. 

  1481. //{START_TIMER

  1482.         if(s->avctx->bits_per_raw_sample <= 8){

  1483.             decode_line(s, w, sample, plane_index, 8);

  1484.             for(x=0; x<w; x++){

  1485.                 src[x + stride*y]= sample[1][x];

  1486.             }

  1487.         }else{

  1488.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1489.             if(s->packed_at_lsb){

  1490.                 for(x=0; x<w; x++){

  1491.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1492.                 }

  1493.             }else{

  1494.                 for(x=0; x<w; x++){

  1495.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1496.                 }

  1497.             }

  1498.         }

  1499. //STOP_TIMER("decode-line")}

  1500.     }

  1501. }

  1502. 

  1503. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1504.     int x, y, p;

  1505.     int16_t *sample[4][2];

  1506.     for(x=0; x<4; x++){

  1507.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1508.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1509.     }

  1510. 

  1511.     s->run_index=0;

  1512. 

  1513.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1514. 

  1515.     for(y=0; y<h; y++){

  1516.         for(p=0; p<3 + s->transparency; p++){

  1517.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1518. 

  1519.             sample[p][0]= sample[p][1];

  1520.             sample[p][1]= temp;

  1521. 

  1522.             sample[p][1][-1]= sample[p][0][0  ];

  1523.             sample[p][0][ w]= sample[p][0][w-1];

  1524.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1525.         }

  1526.         for(x=0; x<w; x++){

  1527.             int g= sample[0][1][x];

  1528.             int b= sample[1][1][x];

  1529.             int r= sample[2][1][x];

  1530.             int a= sample[3][1][x];

  1531. 

  1532. //            assert(g>=0 && b>=0 && r>=0);

  1533. //            assert(g<256 && b<512 && r<512);

  1534. 

  1535.             b -= 0x100;

  1536.             r -= 0x100;

  1537.             g -= (b + r)>>2;

  1538.             b += g;

  1539.             r += g;

  1540. 

  1541.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1542.         }

  1543.     }

  1544. }

  1545. 

  1546. static int decode_slice_header(FFV1Context *f, FFV1Context *fs){

  1547.     RangeCoder *c = &fs->c;

  1548.     uint8_t state[CONTEXT_SIZE];

  1549.     unsigned ps, i, context_count;

  1550.     memset(state, 128, sizeof(state));

  1551. 

  1552.     av_assert0(f->version > 2);

  1553. 

  1554.     fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1555.     fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1556.     fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1557.     fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1558. 

  1559.     fs->slice_x /= f->num_h_slices;

  1560.     fs->slice_y /= f->num_v_slices;

  1561.     fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1562.     fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1563.     if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1564.         return -1;

  1565.     if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1566.         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1567.         return -1;

  1568. 

  1569.     for(i=0; i<f->plane_count; i++){

  1570.         PlaneContext * const p= &fs->plane[i];

  1571.         int idx=get_symbol(c, state, 0);

  1572.         if(idx > (unsigned)f->quant_table_count){

  1573.             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1574.             return -1;

  1575.         }

  1576.         p->quant_table_index= idx;

  1577.         memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1578.         context_count= f->context_count[idx];

  1579. 

  1580.         if(p->context_count < context_count){

  1581.             av_freep(&p->state);

  1582.             av_freep(&p->vlc_state);

  1583.         }

  1584.         p->context_count= context_count;

  1585.     }

  1586. 

  1587.     ps = get_symbol(c, state, 0);

  1588.     if(ps==1){

  1589.         f->picture.interlaced_frame = 1;

  1590.         f->picture.top_field_first  = 1;

  1591.     } else if(ps==2){

  1592.         f->picture.interlaced_frame = 1;

  1593.         f->picture.top_field_first  = 0;

  1594.     } else if(ps==3){

  1595.         f->picture.interlaced_frame = 0;

  1596.     }

  1597.     f->picture.sample_aspect_ratio.num = get_symbol(c, state, 0);

  1598.     f->picture.sample_aspect_ratio.den = get_symbol(c, state, 0);

  1599. 

  1600.     return 0;

  1601. }

  1602. 

  1603. static int decode_slice(AVCodecContext *c, void *arg){

  1604.     FFV1Context *fs= *(void**)arg;

  1605.     FFV1Context *f= fs->avctx->priv_data;

  1606.     int width, height, x, y;

  1607.     const int ps= (c->bits_per_raw_sample>8)+1;

  1608.     AVFrame * const p= &f->picture;

  1609. 

  1610.     if(f->version > 2){

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

  1612.             return AVERROR(ENOMEM);

  1613.         if(decode_slice_header(f, fs) < 0) {

  1614.             fs->slice_damaged = 1;

  1615.             return AVERROR_INVALIDDATA;

  1616.         }

  1617.     }

  1618.     if(init_slice_state(f, fs) < 0)

  1619.         return AVERROR(ENOMEM);

  1620.     if(f->picture.key_frame)

  1621.         clear_slice_state(f, fs);

  1622.     width = fs->slice_width;

  1623.     height= fs->slice_height;

  1624.     x= fs->slice_x;

  1625.     y= fs->slice_y;

  1626. 

  1627.     if(!fs->ac){

  1628.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;

  1629.         init_get_bits(&fs->gb,

  1630.                       fs->c.bytestream_start + fs->ac_byte_count,

  1631.                       (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);

  1632.     }

  1633. 

  1634.     av_assert1(width && height);

  1635.     if(f->colorspace==0){

  1636.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1637.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1638.         const int cx= x>>f->chroma_h_shift;

  1639.         const int cy= y>>f->chroma_v_shift;

  1640.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1641. 

  1642.         if (f->chroma_planes){

  1643.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1644.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1645.         }

  1646.         if (fs->transparency)

  1647.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1648.     }else{

  1649.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1650.     }

  1651.     if(fs->ac && f->version > 2) {

  1652.         int v = fs->c.bytestream_end - fs->c.bytestream - 3 - 5*f->ec;

  1653.         if(v != -1 && v!= 0) {

  1654.             av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);

  1655.             fs->slice_damaged = 1;

  1656.         }

  1657.     }

  1658. 

  1659.     emms_c();

  1660. 

  1661.     return 0;

  1662. }

  1663. 

  1664. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1665.     int v;

  1666.     int i=0;

  1667.     uint8_t state[CONTEXT_SIZE];

  1668. 

  1669.     memset(state, 128, sizeof(state));

  1670. 

  1671.     for(v=0; i<128 ; v++){

  1672.         unsigned len= get_symbol(c, state, 0) + 1;

  1673. 

  1674.         if(len > 128 - i) return -1;

  1675. 

  1676.         while(len--){

  1677.             quant_table[i] = scale*v;

  1678.             i++;

  1679. //printf("%2d ",v);

  1680. //if(i%16==0) printf("\n");

  1681.         }

  1682.     }

  1683. 

  1684.     for(i=1; i<128; i++){

  1685.         quant_table[256-i]= -quant_table[i];

  1686.     }

  1687.     quant_table[128]= -quant_table[127];

  1688. 

  1689.     return 2*v - 1;

  1690. }

  1691. 

  1692. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1693.     int i;

  1694.     int context_count=1;

  1695. 

  1696.     for(i=0; i<5; i++){

  1697.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1698.         if(context_count > 32768U){

  1699.             return -1;

  1700.         }

  1701.     }

  1702.     return (context_count+1)/2;

  1703. }

  1704. 

  1705. static int read_extra_header(FFV1Context *f){

  1706.     RangeCoder * const c= &f->c;

  1707.     uint8_t state[CONTEXT_SIZE];

  1708.     int i, j, k;

  1709.     uint8_t state2[32][CONTEXT_SIZE];

  1710. 

  1711.     memset(state2, 128, sizeof(state2));

  1712.     memset(state, 128, sizeof(state));

  1713. 

  1714.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1715.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1716. 

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

  1718.     if(f->version > 2) {

  1719.         c->bytestream_end -= 4;

  1720.         f->minor_version= get_symbol(c, state, 0);

  1721.     }

  1722.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1723.     if(f->ac>1){

  1724.         for(i=1; i<256; i++){

  1725.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1726.         }

  1727.     }

  1728.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1729.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1730.     f->chroma_planes= get_rac(c, state);

  1731.     f->chroma_h_shift= get_symbol(c, state, 0);

  1732.     f->chroma_v_shift= get_symbol(c, state, 0);

  1733.     f->transparency= get_rac(c, state);

  1734.     f->plane_count= 2 + f->transparency;

  1735.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1736.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1737.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1738.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1739.         return -1;

  1740.     }

  1741. 

  1742.     f->quant_table_count= get_symbol(c, state, 0);

  1743.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1744.         return -1;

  1745.     for(i=0; i<f->quant_table_count; i++){

  1746.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1747.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1748.             return -1;

  1749.         }

  1750.     }

  1751. 

  1752.     if(allocate_initial_states(f) < 0)

  1753.         return AVERROR(ENOMEM);

  1754. 

  1755.     for(i=0; i<f->quant_table_count; i++){

  1756.         if(get_rac(c, state)){

  1757.             for(j=0; j<f->context_count[i]; j++){

  1758.                 for(k=0; k<CONTEXT_SIZE; k++){

  1759.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1760.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1761.                 }

  1762.             }

  1763.         }

  1764.     }

  1765. 

  1766.     if(f->version > 2){

  1767.         f->ec = get_symbol(c, state, 0);

  1768.     }

  1769. 

  1770.     if(f->version > 2){

  1771.         unsigned v;

  1772.         v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, f->avctx->extradata, f->avctx->extradata_size);

  1773.         if(v){

  1774.             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);

  1775.             return AVERROR_INVALIDDATA;

  1776.         }

  1777.     }

  1778. 

  1779.     return 0;

  1780. }

  1781. 

  1782. static int read_header(FFV1Context *f){

  1783.     uint8_t state[CONTEXT_SIZE];

  1784.     int i, j, context_count;

  1785.     RangeCoder * const c= &f->slice_context[0]->c;

  1786. 

  1787.     memset(state, 128, sizeof(state));

  1788. 

  1789.     if(f->version < 2){

  1790.         unsigned v= get_symbol(c, state, 0);

  1791.         if(v >= 2){

  1792.             av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);

  1793.             return AVERROR_INVALIDDATA;

  1794.         }

  1795.         f->version = v;

  1796.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1797.         if(f->ac>1){

  1798.             for(i=1; i<256; i++){

  1799.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1800.             }

  1801.         }

  1802.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1803.         if(f->version>0)

  1804.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1805.         f->chroma_planes= get_rac(c, state);

  1806.         f->chroma_h_shift= get_symbol(c, state, 0);

  1807.         f->chroma_v_shift= get_symbol(c, state, 0);

  1808.         f->transparency= get_rac(c, state);

  1809.         f->plane_count= 2 + f->transparency;

  1810.     }

  1811. 

  1812.     if(f->colorspace==0){

  1813.         if(!f->transparency && !f->chroma_planes){

  1814.             if (f->avctx->bits_per_raw_sample<=8)

  1815.                 f->avctx->pix_fmt= PIX_FMT_GRAY8;

  1816.             else

  1817.                 f->avctx->pix_fmt= PIX_FMT_GRAY16;

  1818.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1819.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1820.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1821.             case 0x01: f->avctx->pix_fmt= PIX_FMT_YUV440P; break;

  1822.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1823.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1824.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1825.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1826.             default:

  1827.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1828.                 return -1;

  1829.             }

  1830.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1831.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1832.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUVA444P; break;

  1833.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUVA422P; break;

  1834.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUVA420P; break;

  1835.             default:

  1836.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1837.                 return -1;

  1838.             }

  1839.         }else if(f->avctx->bits_per_raw_sample==9) {

  1840.             f->packed_at_lsb=1;

  1841.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1842.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P9; break;

  1843.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P9; break;

  1844.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9; break;

  1845.             default:

  1846.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1847.                 return -1;

  1848.             }

  1849.         }else if(f->avctx->bits_per_raw_sample==10) {

  1850.             f->packed_at_lsb=1;

  1851.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1852.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P10; break;

  1853.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; break;

  1854.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; break;

  1855.             default:

  1856.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1857.                 return -1;

  1858.             }

  1859.         }else {

  1860.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1861.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1862.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1863.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1864.             default:

  1865.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1866.                 return -1;

  1867.             }

  1868.         }

  1869.     }else if(f->colorspace==1){

  1870.         if(f->chroma_h_shift || f->chroma_v_shift){

  1871.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1872.             return -1;

  1873.         }

  1874.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1875.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1876.     }else{

  1877.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1878.         return -1;

  1879.     }

  1880. 

  1881. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1882.     if(f->version < 2){

  1883.         context_count= read_quant_tables(c, f->quant_table);

  1884.         if(context_count < 0){

  1885.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1886.                 return -1;

  1887.         }

  1888.     }else if(f->version < 3){

  1889.         f->slice_count= get_symbol(c, state, 0);

  1890.     }else{

  1891.         const uint8_t *p= c->bytestream_end;

  1892.         for(f->slice_count = 0; f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start; f->slice_count++){

  1893.             int trailer = 3 + 5*!!f->ec;

  1894.             int size = AV_RB24(p-trailer);

  1895.             if(size + trailer > p - c->bytestream_start)

  1896.                 break;

  1897.             p -= size + trailer;

  1898.         }

  1899.     }

  1900.     if(f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0){

  1901.         av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->slice_count);

  1902.         return -1;

  1903.     }

  1904. 

  1905.     for(j=0; j<f->slice_count; j++){

  1906.         FFV1Context *fs= f->slice_context[j];

  1907.         fs->ac= f->ac;

  1908.         fs->packed_at_lsb= f->packed_at_lsb;

  1909. 

  1910.         fs->slice_damaged = 0;

  1911. 

  1912.         if(f->version == 2){

  1913.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1914.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1915.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1916.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1917. 

  1918.             fs->slice_x /= f->num_h_slices;

  1919.             fs->slice_y /= f->num_v_slices;

  1920.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1921.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1922.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1923.                 return -1;

  1924.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1925.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1926.                 return -1;

  1927.         }

  1928. 

  1929.         for(i=0; i<f->plane_count; i++){

  1930.             PlaneContext * const p= &fs->plane[i];

  1931. 

  1932.             if(f->version == 2){

  1933.                 int idx=get_symbol(c, state, 0);

  1934.                 if(idx > (unsigned)f->quant_table_count){

  1935.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1936.                     return -1;

  1937.                 }

  1938.                 p->quant_table_index= idx;

  1939.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1940.                 context_count= f->context_count[idx];

  1941.             }else{

  1942.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1943.             }

  1944. 

  1945.             if(f->version <= 2){

  1946.                 if(p->context_count < context_count){

  1947.                     av_freep(&p->state);

  1948.                     av_freep(&p->vlc_state);

  1949.                 }

  1950.                 p->context_count= context_count;

  1951.             }

  1952.         }

  1953.     }

  1954.     return 0;

  1955. }

  1956. 

  1957. static av_cold int decode_init(AVCodecContext *avctx)

  1958. {

  1959.     FFV1Context *f = avctx->priv_data;

  1960. 

  1961.     common_init(avctx);

  1962. 

  1963.     if(avctx->extradata && read_extra_header(f) < 0)

  1964.         return -1;

  1965. 

  1966.     if(init_slice_contexts(f) < 0)

  1967.         return -1;

  1968. 

  1969.     return 0;

  1970. }

  1971. 

  1972. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1973.     const uint8_t *buf = avpkt->data;

  1974.     int buf_size = avpkt->size;

  1975.     FFV1Context *f = avctx->priv_data;

  1976.     RangeCoder * const c= &f->slice_context[0]->c;

  1977.     AVFrame * const p= &f->picture;

  1978.     int i;

  1979.     uint8_t keystate= 128;

  1980.     const uint8_t *buf_p;

  1981. 

  1982.     AVFrame *picture = data;

  1983. 

  1984.     /* release previously stored data */

  1985.     if (p->data[0])

  1986.         avctx->release_buffer(avctx, p);

  1987. 

  1988.     ff_init_range_decoder(c, buf, buf_size);

  1989.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1990. 

  1991. 

  1992.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1993.     if(get_rac(c, &keystate)){

  1994.         p->key_frame= 1;

  1995.         f->key_frame_ok = 0;

  1996.         if(read_header(f) < 0)

  1997.             return -1;

  1998.         f->key_frame_ok = 1;

  1999.     }else{

  2000.         if (!f->key_frame_ok) {

  2001.             av_log(avctx, AV_LOG_ERROR, "Cant decode non keyframe without valid keyframe\n");

  2002.             return AVERROR_INVALIDDATA;

  2003.         }

  2004.         p->key_frame= 0;

  2005.     }

  2006. 

  2007.     p->reference= 3; //for error concealment

  2008.     if(avctx->get_buffer(avctx, p) < 0){

  2009.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  2010.         return -1;

  2011.     }

  2012. 

  2013.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  2014.         av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d\n",

  2015.                f->version, p->key_frame, f->ac, f->ec, f->slice_count);

  2016. 

  2017.     buf_p= buf + buf_size;

  2018.     for(i=f->slice_count-1; i>=0; i--){

  2019.         FFV1Context *fs= f->slice_context[i];

  2020.         int trailer = 3 + 5*!!f->ec;

  2021.         int v;

  2022. 

  2023.         if(i || f->version>2) v = AV_RB24(buf_p-trailer)+trailer;

  2024.         else                  v = buf_p - c->bytestream_start;

  2025.         if(buf_p - c->bytestream_start < v){

  2026.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  2027.             return -1;

  2028.         }

  2029.         buf_p -= v;

  2030. 

  2031.         if(f->ec){

  2032.             unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);

  2033.             if(crc){

  2034.                 int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;

  2035.                 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);

  2036.                 if(ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {

  2037.                     av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n",ts*av_q2d(avctx->pkt_timebase));

  2038.                 } else if(ts != AV_NOPTS_VALUE) {

  2039.                     av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);

  2040.                 } else {

  2041.                     av_log(f->avctx, AV_LOG_ERROR, "\n");

  2042.                 }

  2043.                 fs->slice_damaged = 1;

  2044.             }

  2045.         }

  2046. 

  2047.         if(i){

  2048.             ff_init_range_decoder(&fs->c, buf_p, v);

  2049.         }else

  2050.             fs->c.bytestream_end = (uint8_t *)(buf_p + v);

  2051.     }

  2052. 

  2053.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  2054. 

  2055.     for(i=f->slice_count-1; i>=0; i--){

  2056.         FFV1Context *fs= f->slice_context[i];

  2057.         int j;

  2058.         if(fs->slice_damaged && f->last_picture.data[0]){

  2059.             uint8_t *dst[4], *src[4];

  2060.             for(j=0; j<4; j++){

  2061.                 int sh = (j==1 || j==2) ? f->chroma_h_shift : 0;

  2062.                 int sv = (j==1 || j==2) ? f->chroma_v_shift : 0;

  2063.                 dst[j] = f->picture     .data[j] + f->picture     .linesize[j]*

  2064.                          (fs->slice_y>>sv) + (fs->slice_x>>sh);

  2065.                 src[j] = f->last_picture.data[j] + f->last_picture.linesize[j]*

  2066.                          (fs->slice_y>>sv) + (fs->slice_x>>sh);

  2067.             }

  2068.             av_image_copy(dst, f->picture.linesize, (const uint8_t **)src, f->last_picture.linesize,

  2069.                           avctx->pix_fmt, fs->slice_width, fs->slice_height);

  2070.         }

  2071.     }

  2072. 

  2073.     f->picture_number++;

  2074. 

  2075.     *picture= *p;

  2076.     *data_size = sizeof(AVFrame);

  2077. 

  2078.     FFSWAP(AVFrame, f->picture, f->last_picture);

  2079. 

  2080.     return buf_size;

  2081. }

  2082. 

  2083. AVCodec ff_ffv1_decoder = {

  2084.     .name           = "ffv1",

  2085.     .type           = AVMEDIA_TYPE_VIDEO,

  2086.     .id             = AV_CODEC_ID_FFV1,

  2087.     .priv_data_size = sizeof(FFV1Context),

  2088.     .init           = decode_init,

  2089.     .close          = common_end,

  2090.     .decode         = decode_frame,

  2091.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |

  2092.                       CODEC_CAP_SLICE_THREADS,

  2093.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2094. };

  2095. 

  2096. #if CONFIG_FFV1_ENCODER

  2097. 

  2098. #define OFFSET(x) offsetof(FFV1Context, x)

  2099. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  2100. static const AVOption options[] = {

  2101.     { "slicecrc",        "Protect slices with CRCs",               OFFSET(ec),              AV_OPT_TYPE_INT, {-1}, -1, 1, VE},

  2102. {NULL}

  2103. };

  2104. 

  2105. static const AVClass class = {

  2106.     .class_name = "ffv1 encoder",

  2107.     .item_name  = av_default_item_name,

  2108.     .option     = options,

  2109.     .version    = LIBAVUTIL_VERSION_INT,

  2110. };

  2111. 

  2112. static const AVCodecDefault ffv1_defaults[] = {

  2113.     { "coder",                "-1" },

  2114.     { NULL },

  2115. };

  2116. 

  2117. AVCodec ff_ffv1_encoder = {

  2118.     .name           = "ffv1",

  2119.     .type           = AVMEDIA_TYPE_VIDEO,

  2120.     .id             = AV_CODEC_ID_FFV1,

  2121.     .priv_data_size = sizeof(FFV1Context),

  2122.     .init           = encode_init,

  2123.     .encode2        = encode_frame,

  2124.     .close          = common_end,

  2125.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  2126.     .defaults       = ffv1_defaults,

  2127.     .pix_fmts       = (const enum PixelFormat[]){

  2128.         PIX_FMT_YUV420P, PIX_FMT_YUVA420P, PIX_FMT_YUVA422P, PIX_FMT_YUV444P,

  2129.         PIX_FMT_YUVA444P, PIX_FMT_YUV440P, PIX_FMT_YUV422P, PIX_FMT_YUV411P,

  2130.         PIX_FMT_YUV410P, PIX_FMT_0RGB32, PIX_FMT_RGB32, PIX_FMT_YUV420P16,

  2131.         PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV444P9, PIX_FMT_YUV422P9,

  2132.         PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_YUV444P10,

  2133.         PIX_FMT_GRAY16, PIX_FMT_GRAY8,

  2134.         PIX_FMT_NONE

  2135.     },

  2136.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2137.     .priv_class     = &class,

  2138. };

  2139. #endif