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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

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

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "get_bits.h"

  30. #include "put_bits.h"

  31. #include "dsputil.h"

  32. #include "rangecoder.h"

  33. #include "golomb.h"

  34. #include "mathops.h"

  35. #include "libavutil/avassert.h"

  36. 

  37. #define MAX_PLANES 4

  38. #define CONTEXT_SIZE 32

  39. 

  40. #define MAX_QUANT_TABLES 8

  41. #define MAX_CONTEXT_INPUTS 5

  42. 

  43. extern const uint8_t ff_log2_run[41];

  44. 

  45. static const int8_t quant5_10bit[256]={

  46.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

  47.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  48.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  49.  1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

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

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

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

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

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

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

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

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

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

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

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

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

  62. };

  63. 

  64. static const int8_t quant5[256]={

  65.  0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

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

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

  68.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  69.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  70.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  71.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  72.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  73. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  74. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  75. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

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

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

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

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

  80. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,

  81. };

  82. 

  83. static const int8_t quant9_10bit[256]={

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  100. };

  101. 

  102. static const int8_t quant11[256]={

  103.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

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

  105.  4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,

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

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

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

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

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

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

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

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

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

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

  116. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,

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

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

  119. };

  120. 

  121. static const uint8_t ver2_state[256]= {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  138. };

  139. 

  140. typedef struct VlcState{

  141.     int16_t drift;

  142.     uint16_t error_sum;

  143.     int8_t bias;

  144.     uint8_t count;

  145. } VlcState;

  146. 

  147. typedef struct PlaneContext{

  148.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  149.     int quant_table_index;

  150.     int context_count;

  151.     uint8_t (*state)[CONTEXT_SIZE];

  152.     VlcState *vlc_state;

  153.     uint8_t interlace_bit_state[2];

  154. } PlaneContext;

  155. 

  156. #define MAX_SLICES 256

  157. 

  158. typedef struct FFV1Context{

  159.     AVCodecContext *avctx;

  160.     RangeCoder c;

  161.     GetBitContext gb;

  162.     PutBitContext pb;

  163.     uint64_t rc_stat[256][2];

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

  165.     int version;

  166.     int width, height;

  167.     int chroma_h_shift, chroma_v_shift;

  168.     int transparency;

  169.     int flags;

  170.     int picture_number;

  171.     AVFrame picture;

  172.     int plane_count;

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

  174.     PlaneContext plane[MAX_PLANES];

  175.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  177.     int context_count[MAX_QUANT_TABLES];

  178.     uint8_t state_transition[256];

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

  180.     int run_index;

  181.     int colorspace;

  182.     int16_t *sample_buffer;

  183.     int gob_count;

  184.     int packed_at_lsb;

  185. 

  186.     int quant_table_count;

  187. 

  188.     DSPContext dsp;

  189. 

  190.     struct FFV1Context *slice_context[MAX_SLICES];

  191.     int slice_count;

  192.     int num_v_slices;

  193.     int num_h_slices;

  194.     int slice_width;

  195.     int slice_height;

  196.     int slice_x;

  197.     int slice_y;

  198. }FFV1Context;

  199. 

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

  201.     if(bits==8)

  202.         diff= (int8_t)diff;

  203.     else{

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

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

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

  207.     }

  208. 

  209.     return diff;

  210. }

  211. 

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

  213. {

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

  215.     const int  T= last[ 0];

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

  217. 

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

  219. }

  220. 

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

  222.                               int16_t *last, int16_t *last2)

  223. {

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

  225.     const int  T= last[ 0];

  226.     const int RT= last[ 1];

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

  228. 

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

  230.         const int TT= last2[0];

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

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

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

  234.     }else

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

  236. }

  237. 

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

  239.     int i,j,k,m;

  240.     double l2tab[256];

  241. 

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

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

  244. 

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

  246.         double best_len[256];

  247.         double p= i/256.0;

  248. 

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

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

  251. 

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

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

  254.             double len=0;

  255.             occ[j]=1.0;

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

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

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

  259.                     if(occ[m]){

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

  261.                                       + (1-p)*l2tab[256-m]);

  262.                     }

  263.                 }

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

  265.                     best_len[k]= len;

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

  267.                 }

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

  269.                     if(occ[m]){

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

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

  272.                     }

  273.                 }

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

  275.             }

  276.         }

  277.     }

  278. }

  279. 

  280. 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]){

  281.     int i;

  282. 

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

  284. do{\

  285.     if(rc_stat){\

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

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

  288.     }\

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

  290. }while(0)

  291. 

  292.     if(v){

  293.         const int a= FFABS(v);

  294.         const int e= av_log2(a);

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

  296.         if(e<=9){

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

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

  299.             }

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

  301. 

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

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

  304.             }

  305. 

  306.             if(is_signed)

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

  308.         }else{

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

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

  311.             }

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

  313. 

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

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

  316.             }

  317. 

  318.             if(is_signed)

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

  320.         }

  321.     }else{

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

  323.     }

  324. #undef put_rac

  325. }

  326. 

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

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

  329. }

  330. 

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

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

  333.         return 0;

  334.     else{

  335.         int i, e, a;

  336.         e= 0;

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

  338.             e++;

  339.         }

  340. 

  341.         a= 1;

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

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

  344.         }

  345. 

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

  347.         return (a^e)-e;

  348.     }

  349. }

  350. 

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

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

  353. }

  354. 

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

  356.     int drift= state->drift;

  357.     int count= state->count;

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

  359.     drift += v;

  360. 

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

  362.         count >>= 1;

  363.         drift >>= 1;

  364.         state->error_sum >>= 1;

  365.     }

  366.     count++;

  367. 

  368.     if(drift <= -count){

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

  370. 

  371.         drift += count;

  372.         if(drift <= -count)

  373.             drift= -count + 1;

  374.     }else if(drift > 0){

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

  376. 

  377.         drift -= count;

  378.         if(drift > 0)

  379.             drift= 0;

  380.     }

  381. 

  382.     state->drift= drift;

  383.     state->count= count;

  384. }

  385. 

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

  387.     int i, k, code;

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

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

  390. 

  391.     i= state->count;

  392.     k=0;

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

  394.         k++;

  395.         i += i;

  396.     }

  397. 

  398.     assert(k<=8);

  399. 

  400. #if 0 // JPEG LS

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

  402.     else                                         code= v;

  403. #else

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

  405. #endif

  406. 

  407. //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);

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

  409. 

  410.     update_vlc_state(state, v);

  411. }

  412. 

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

  414.     int k, i, v, ret;

  415. 

  416.     i= state->count;

  417.     k=0;

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

  419.         k++;

  420.         i += i;

  421.     }

  422. 

  423.     assert(k<=8);

  424. 

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

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

  427. 

  428. #if 0 // JPEG LS

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

  430. #else

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

  432. #endif

  433. 

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

  435. 

  436.     update_vlc_state(state, v);

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

  438.     return ret;

  439. }

  440. 

  441. #if CONFIG_FFV1_ENCODER

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

  443.                                         int16_t *sample[2],

  444.                                         int plane_index, int bits)

  445. {

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

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

  448.     int x;

  449.     int run_index= s->run_index;

  450.     int run_count=0;

  451.     int run_mode=0;

  452. 

  453.     if(s->ac){

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

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

  456.             return -1;

  457.         }

  458.     }else{

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

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

  461.             return -1;

  462.         }

  463.     }

  464. 

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

  466.         int diff, context;

  467. 

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

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

  470. 

  471.         if(context < 0){

  472.             context = -context;

  473.             diff= -diff;

  474.         }

  475. 

  476.         diff= fold(diff, bits);

  477. 

  478.         if(s->ac){

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

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

  481.             }else{

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

  483.             }

  484.         }else{

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

  486. 

  487.             if(run_mode){

  488. 

  489.                 if(diff){

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

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

  492.                         run_index++;

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

  494.                     }

  495. 

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

  497.                     if(run_index) run_index--;

  498.                     run_count=0;

  499.                     run_mode=0;

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

  501.                 }else{

  502.                     run_count++;

  503.                 }

  504.             }

  505. 

  506. //            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));

  507. 

  508.             if(run_mode == 0)

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

  510.         }

  511.     }

  512.     if(run_mode){

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

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

  515.             run_index++;

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

  517.         }

  518. 

  519.         if(run_count)

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

  521.     }

  522.     s->run_index= run_index;

  523. 

  524.     return 0;

  525. }

  526. 

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

  528.     int x,y,i;

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

  530.     int16_t *sample[3];

  531.     s->run_index=0;

  532. 

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

  534. 

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

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

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

  538. 

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

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

  541. //{START_TIMER

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

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

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

  545.             }

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

  547.         }else{

  548.             if(s->packed_at_lsb){

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

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

  551.                 }

  552.             }else{

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

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

  555.                 }

  556.             }

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

  558.         }

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

  560.     }

  561. }

  562. 

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

  564.     int x, y, p, i;

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

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

  567.     s->run_index=0;

  568. 

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

  570. 

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

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

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

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

  575. 

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

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

  578.             int b= v&0xFF;

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

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

  581.             int a=  v>>24;

  582. 

  583.             b -= g;

  584.             r -= g;

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

  586.             b += 0x100;

  587.             r += 0x100;

  588. 

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

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

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

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

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

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

  595.         }

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

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

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

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

  600.         }

  601.     }

  602. }

  603. 

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

  605.     int last=0;

  606.     int i;

  607.     uint8_t state[CONTEXT_SIZE];

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

  609. 

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

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

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

  613.             last= i;

  614.         }

  615.     }

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

  617. }

  618. 

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

  620.     int i;

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

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

  623. }

  624. 

  625. static void write_header(FFV1Context *f){

  626.     uint8_t state[CONTEXT_SIZE];

  627.     int i, j;

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

  629. 

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

  631. 

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

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

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

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

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

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

  638.             }

  639.         }

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

  641.         if(f->version>0)

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

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

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

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

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

  647. 

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

  649.     }else{

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

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

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

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

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

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

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

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

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

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

  660.             }

  661.         }

  662.     }

  663. }

  664. #endif /* CONFIG_FFV1_ENCODER */

  665. 

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

  667.     FFV1Context *s = avctx->priv_data;

  668. 

  669.     s->avctx= avctx;

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

  671. 

  672.     avcodec_get_frame_defaults(&s->picture);

  673. 

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

  675. 

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

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

  678. 

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

  680.     //defaults

  681.     s->num_h_slices=1;

  682.     s->num_v_slices=1;

  683. 

  684. 

  685.     return 0;

  686. }

  687. 

  688. static int init_slice_state(FFV1Context *f){

  689.     int i, j;

  690. 

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

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

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

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

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

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

  697. 

  698.             if(fs->ac){

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

  700.                 if(!p->    state)

  701.                     return AVERROR(ENOMEM);

  702.             }else{

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

  704.                 if(!p->vlc_state)

  705.                     return AVERROR(ENOMEM);

  706.             }

  707.         }

  708. 

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

  710.             //FIXME only redo if state_transition changed

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

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

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

  714.             }

  715.         }

  716.     }

  717. 

  718.     return 0;

  719. }

  720. 

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

  722.     int i;

  723. 

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

  725. 

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

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

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

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

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

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

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

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

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

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

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

  737. 

  738.         fs->slice_width = sxe - sxs;

  739.         fs->slice_height= sye - sys;

  740.         fs->slice_x     = sxs;

  741.         fs->slice_y     = sys;

  742. 

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

  744.         if (!fs->sample_buffer)

  745.             return AVERROR(ENOMEM);

  746.     }

  747.     return 0;

  748. }

  749. 

  750. static int allocate_initial_states(FFV1Context *f){

  751.     int i;

  752. 

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

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

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

  756.             return AVERROR(ENOMEM);

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

  758.     }

  759.     return 0;

  760. }

  761. 

  762. #if CONFIG_FFV1_ENCODER

  763. static int write_extra_header(FFV1Context *f){

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

  765.     uint8_t state[CONTEXT_SIZE];

  766.     int i, j, k;

  767.     uint8_t state2[32][CONTEXT_SIZE];

  768. 

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

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

  771. 

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

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

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

  775. 

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

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

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

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

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

  781.         }

  782.     }

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

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

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

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

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

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

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

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

  791. 

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

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

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

  795. 

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

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

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

  799.                 break;

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

  801.             put_rac(c, state, 1);

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

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

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

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

  806.                 }

  807.             }

  808.         }else{

  809.             put_rac(c, state, 0);

  810.         }

  811.     }

  812. 

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

  814. 

  815.     return 0;

  816. }

  817. 

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

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

  820. 

  821.     do{

  822.         changed=0;

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

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

  825. #define COST(old, new) \

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

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

  828. 

  829. #define COST2(old, new) \

  830.     COST(old, new)\

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

  832. 

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

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

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

  836.                     int j;

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

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

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

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

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

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

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

  844.                     }

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

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

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

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

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

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

  851.                         }

  852.                     }

  853.                     print=changed=1;

  854.                 }

  855.             }

  856.         }

  857.     }while(changed);

  858.     return print;

  859. }

  860. 

  861. static av_cold int encode_init(AVCodecContext *avctx)

  862. {

  863.     FFV1Context *s = avctx->priv_data;

  864.     int i, j, k, m;

  865. 

  866.     common_init(avctx);

  867. 

  868.     s->version=0;

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

  870. 

  871.     if(s->ac>1)

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

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

  874. 

  875.     s->plane_count=3;

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

  877.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  887.         }else{

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

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

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

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

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

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

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

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

  896.         }

  897.     }

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

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

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

  901. 

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

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

  904. 

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

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

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

  908.     }

  909. 

  910.     if(allocate_initial_states(s) < 0)

  911.         return AVERROR(ENOMEM);

  912. 

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

  914.     switch(avctx->pix_fmt){

  915.     case PIX_FMT_YUV420P9:

  916.     case PIX_FMT_YUV420P10:

  917.     case PIX_FMT_YUV422P10:

  918.         s->packed_at_lsb = 1;

  919.     case PIX_FMT_YUV444P16:

  920.     case PIX_FMT_YUV422P16:

  921.     case PIX_FMT_YUV420P16:

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

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

  924.             return -1;

  925.         }

  926.         if(!s->ac){

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

  928.             return -1;

  929.         }

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

  931.     case PIX_FMT_YUV444P:

  932.     case PIX_FMT_YUV422P:

  933.     case PIX_FMT_YUV420P:

  934.     case PIX_FMT_YUV411P:

  935.     case PIX_FMT_YUV410P:

  936.         s->colorspace= 0;

  937.         break;

  938.     case PIX_FMT_RGB32:

  939.         s->colorspace= 1;

  940.         s->transparency= 1;

  941.         break;

  942.     case PIX_FMT_0RGB32:

  943.         s->colorspace= 1;

  944.         break;

  945.     default:

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

  947.         return -1;

  948.     }

  949.     if(!s->transparency)

  950.         s->plane_count= 2;

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

  952. 

  953.     s->picture_number=0;

  954. 

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

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

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

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

  959.                 return AVERROR(ENOMEM);

  960.         }

  961.     }

  962.     if(avctx->stats_in){

  963.         char *p= avctx->stats_in;

  964.         uint8_t best_state[256][256];

  965.         int gob_count=0;

  966.         char *next;

  967. 

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

  969. 

  970.         for(;;){

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

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

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

  974.                     if(next==p){

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

  976.                         return -1;

  977.                     }

  978.                     p=next;

  979.                 }

  980.             }

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

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

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

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

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

  986.                             if(next==p){

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

  988.                                 return -1;

  989.                             }

  990.                             p=next;

  991.                         }

  992.                     }

  993.                 }

  994.             }

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

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

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

  998.                 return -1;

  999.             }

  1000.             p=next;

  1001.             while(*p=='\n' || *p==' ') p++;

  1002.             if(p[0]==0) break;

  1003.         }

  1004.         sort_stt(s, s->state_transition);

  1005. 

  1006.         find_best_state(best_state, s->state_transition);

  1007. 

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

  1009.             for(j=0; j<s->context_count[i]; j++){

  1010.                 for(k=0; k<32; k++){

  1011.                     double p= 128;

  1012.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1013.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1014.                     }

  1015.                     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)];

  1016.                 }

  1017.             }

  1018.         }

  1019.     }

  1020. 

  1021.     if(s->version>1){

  1022.         s->num_h_slices=2;

  1023.         s->num_v_slices=2;

  1024.         write_extra_header(s);

  1025.     }

  1026. 

  1027.     if(init_slice_contexts(s) < 0)

  1028.         return -1;

  1029.     if(init_slice_state(s) < 0)

  1030.         return -1;

  1031. 

  1032. #define STATS_OUT_SIZE 1024*1024*6

  1033.     if(avctx->flags & CODEC_FLAG_PASS1){

  1034.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1035.         for(i=0; i<s->quant_table_count; i++){

  1036.             for(j=0; j<s->slice_count; j++){

  1037.                 FFV1Context *sf= s->slice_context[j];

  1038.                 av_assert0(!sf->rc_stat2[i]);

  1039.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1040.                 if(!sf->rc_stat2[i])

  1041.                     return AVERROR(ENOMEM);

  1042.             }

  1043.         }

  1044.     }

  1045. 

  1046.     return 0;

  1047. }

  1048. #endif /* CONFIG_FFV1_ENCODER */

  1049. 

  1050. 

  1051. static void clear_state(FFV1Context *f){

  1052.     int i, si, j;

  1053. 

  1054.     for(si=0; si<f->slice_count; si++){

  1055.         FFV1Context *fs= f->slice_context[si];

  1056.         for(i=0; i<f->plane_count; i++){

  1057.             PlaneContext *p= &fs->plane[i];

  1058. 

  1059.             p->interlace_bit_state[0]= 128;

  1060.             p->interlace_bit_state[1]= 128;

  1061. 

  1062.             if(fs->ac){

  1063.                 if(f->initial_states[p->quant_table_index]){

  1064.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1065.                 }else

  1066.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1067.             }else{

  1068.             for(j=0; j<p->context_count; j++){

  1069.                     p->vlc_state[j].drift= 0;

  1070.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1071.                     p->vlc_state[j].bias= 0;

  1072.                     p->vlc_state[j].count= 1;

  1073.             }

  1074.             }

  1075.         }

  1076.     }

  1077. }

  1078. 

  1079. #if CONFIG_FFV1_ENCODER

  1080. static int encode_slice(AVCodecContext *c, void *arg){

  1081.     FFV1Context *fs= *(void**)arg;

  1082.     FFV1Context *f= fs->avctx->priv_data;

  1083.     int width = fs->slice_width;

  1084.     int height= fs->slice_height;

  1085.     int x= fs->slice_x;

  1086.     int y= fs->slice_y;

  1087.     AVFrame * const p= &f->picture;

  1088.     const int ps= (c->bits_per_raw_sample>8)+1;

  1089. 

  1090.     if(f->colorspace==0){

  1091.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1092.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1093.         const int cx= x>>f->chroma_h_shift;

  1094.         const int cy= y>>f->chroma_v_shift;

  1095. 

  1096.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1097. 

  1098.         encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1099.         encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1100.     }else{

  1101.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1102.     }

  1103.     emms_c();

  1104. 

  1105.     return 0;

  1106. }

  1107. 

  1108. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1109.     FFV1Context *f = avctx->priv_data;

  1110.     RangeCoder * const c= &f->slice_context[0]->c;

  1111.     AVFrame *pict = data;

  1112.     AVFrame * const p= &f->picture;

  1113.     int used_count= 0;

  1114.     uint8_t keystate=128;

  1115.     uint8_t *buf_p;

  1116.     int i;

  1117. 

  1118.     ff_init_range_encoder(c, buf, buf_size);

  1119.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1120. 

  1121.     *p = *pict;

  1122.     p->pict_type= AV_PICTURE_TYPE_I;

  1123. 

  1124.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1125.         put_rac(c, &keystate, 1);

  1126.         p->key_frame= 1;

  1127.         f->gob_count++;

  1128.         write_header(f);

  1129.         clear_state(f);

  1130.     }else{

  1131.         put_rac(c, &keystate, 0);

  1132.         p->key_frame= 0;

  1133.     }

  1134. 

  1135.     if(!f->ac){

  1136.         used_count += ff_rac_terminate(c);

  1137. //printf("pos=%d\n", used_count);

  1138.         init_put_bits(&f->slice_context[0]->pb, buf + used_count, buf_size - used_count);

  1139.     }else if (f->ac>1){

  1140.         int i;

  1141.         for(i=1; i<256; i++){

  1142.             c->one_state[i]= f->state_transition[i];

  1143.             c->zero_state[256-i]= 256-c->one_state[i];

  1144.         }

  1145.     }

  1146. 

  1147.     for(i=1; i<f->slice_count; i++){

  1148.         FFV1Context *fs= f->slice_context[i];

  1149.         uint8_t *start= buf + (buf_size-used_count)*i/f->slice_count;

  1150.         int len= buf_size/f->slice_count;

  1151. 

  1152.         if(fs->ac){

  1153.             ff_init_range_encoder(&fs->c, start, len);

  1154.         }else{

  1155.             init_put_bits(&fs->pb, start, len);

  1156.         }

  1157.     }

  1158.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1159. 

  1160.     buf_p=buf;

  1161.     for(i=0; i<f->slice_count; i++){

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

  1163.         int bytes;

  1164. 

  1165.         if(fs->ac){

  1166.             uint8_t state=128;

  1167.             put_rac(&fs->c, &state, 0);

  1168.             bytes= ff_rac_terminate(&fs->c);

  1169.         }else{

  1170.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1171.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1172.             used_count= 0;

  1173.         }

  1174.         if(i>0){

  1175.             av_assert0(bytes < buf_size/f->slice_count);

  1176.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1177.             av_assert0(bytes < (1<<24));

  1178.             AV_WB24(buf_p+bytes, bytes);

  1179.             bytes+=3;

  1180.         }

  1181.         buf_p += bytes;

  1182.     }

  1183. 

  1184.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1185.         int j, k, m;

  1186.         char *p= avctx->stats_out;

  1187.         char *end= p + STATS_OUT_SIZE;

  1188. 

  1189.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1190.         for(i=0; i<f->quant_table_count; i++)

  1191.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1192. 

  1193.         for(j=0; j<f->slice_count; j++){

  1194.             FFV1Context *fs= f->slice_context[j];

  1195.             for(i=0; i<256; i++){

  1196.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1197.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1198.             }

  1199.             for(i=0; i<f->quant_table_count; i++){

  1200.                 for(k=0; k<f->context_count[i]; k++){

  1201.                     for(m=0; m<32; m++){

  1202.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1203.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1204.                     }

  1205.                 }

  1206.             }

  1207.         }

  1208. 

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

  1210.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1211.             p+= strlen(p);

  1212.         }

  1213.         snprintf(p, end-p, "\n");

  1214. 

  1215.         for(i=0; i<f->quant_table_count; i++){

  1216.             for(j=0; j<f->context_count[i]; j++){

  1217.                 for(m=0; m<32; m++){

  1218.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1219.                     p+= strlen(p);

  1220.                 }

  1221.             }

  1222.         }

  1223.         snprintf(p, end-p, "%d\n", f->gob_count);

  1224.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1225.         avctx->stats_out[0] = '\0';

  1226. 

  1227.     f->picture_number++;

  1228.     return buf_p-buf;

  1229. }

  1230. #endif /* CONFIG_FFV1_ENCODER */

  1231. 

  1232. static av_cold int common_end(AVCodecContext *avctx){

  1233.     FFV1Context *s = avctx->priv_data;

  1234.     int i, j;

  1235. 

  1236.     if (avctx->codec->decode && s->picture.data[0])

  1237.         avctx->release_buffer(avctx, &s->picture);

  1238. 

  1239.     for(j=0; j<s->slice_count; j++){

  1240.         FFV1Context *fs= s->slice_context[j];

  1241.         for(i=0; i<s->plane_count; i++){

  1242.             PlaneContext *p= &fs->plane[i];

  1243. 

  1244.             av_freep(&p->state);

  1245.             av_freep(&p->vlc_state);

  1246.         }

  1247.         av_freep(&fs->sample_buffer);

  1248.     }

  1249. 

  1250.     av_freep(&avctx->stats_out);

  1251.     for(j=0; j<s->quant_table_count; j++){

  1252.         av_freep(&s->initial_states[j]);

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

  1254.             FFV1Context *sf= s->slice_context[i];

  1255.             av_freep(&sf->rc_stat2[j]);

  1256.         }

  1257.         av_freep(&s->rc_stat2[j]);

  1258.     }

  1259. 

  1260.     for(i=0; i<s->slice_count; i++){

  1261.         av_freep(&s->slice_context[i]);

  1262.     }

  1263. 

  1264.     return 0;

  1265. }

  1266. 

  1267. static av_always_inline void decode_line(FFV1Context *s, int w,

  1268.                                          int16_t *sample[2],

  1269.                                          int plane_index, int bits)

  1270. {

  1271.     PlaneContext * const p= &s->plane[plane_index];

  1272.     RangeCoder * const c= &s->c;

  1273.     int x;

  1274.     int run_count=0;

  1275.     int run_mode=0;

  1276.     int run_index= s->run_index;

  1277. 

  1278.     for(x=0; x<w; x++){

  1279.         int diff, context, sign;

  1280. 

  1281.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1282.         if(context < 0){

  1283.             context= -context;

  1284.             sign=1;

  1285.         }else

  1286.             sign=0;

  1287. 

  1288.         av_assert2(context < p->context_count);

  1289. 

  1290.         if(s->ac){

  1291.             diff= get_symbol_inline(c, p->state[context], 1);

  1292.         }else{

  1293.             if(context == 0 && run_mode==0) run_mode=1;

  1294. 

  1295.             if(run_mode){

  1296.                 if(run_count==0 && run_mode==1){

  1297.                     if(get_bits1(&s->gb)){

  1298.                         run_count = 1<<ff_log2_run[run_index];

  1299.                         if(x + run_count <= w) run_index++;

  1300.                     }else{

  1301.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1302.                         else run_count=0;

  1303.                         if(run_index) run_index--;

  1304.                         run_mode=2;

  1305.                     }

  1306.                 }

  1307.                 run_count--;

  1308.                 if(run_count < 0){

  1309.                     run_mode=0;

  1310.                     run_count=0;

  1311.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1312.                     if(diff>=0) diff++;

  1313.                 }else

  1314.                     diff=0;

  1315.             }else

  1316.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1317. 

  1318. //            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));

  1319.         }

  1320. 

  1321.         if(sign) diff= -diff;

  1322. 

  1323.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1324.     }

  1325.     s->run_index= run_index;

  1326. }

  1327. 

  1328. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1329.     int x, y;

  1330.     int16_t *sample[2];

  1331.     sample[0]=s->sample_buffer    +3;

  1332.     sample[1]=s->sample_buffer+w+6+3;

  1333. 

  1334.     s->run_index=0;

  1335. 

  1336.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1337. 

  1338.     for(y=0; y<h; y++){

  1339.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1340. 

  1341.         sample[0]= sample[1];

  1342.         sample[1]= temp;

  1343. 

  1344.         sample[1][-1]= sample[0][0  ];

  1345.         sample[0][ w]= sample[0][w-1];

  1346. 

  1347. //{START_TIMER

  1348.         if(s->avctx->bits_per_raw_sample <= 8){

  1349.             decode_line(s, w, sample, plane_index, 8);

  1350.             for(x=0; x<w; x++){

  1351.                 src[x + stride*y]= sample[1][x];

  1352.             }

  1353.         }else{

  1354.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1355.             if(s->packed_at_lsb){

  1356.                 for(x=0; x<w; x++){

  1357.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1358.                 }

  1359.             }else{

  1360.                 for(x=0; x<w; x++){

  1361.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1362.                 }

  1363.             }

  1364.         }

  1365. //STOP_TIMER("decode-line")}

  1366.     }

  1367. }

  1368. 

  1369. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1370.     int x, y, p;

  1371.     int16_t *sample[4][2];

  1372.     for(x=0; x<4; x++){

  1373.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1374.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1375.     }

  1376. 

  1377.     s->run_index=0;

  1378. 

  1379.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1380. 

  1381.     for(y=0; y<h; y++){

  1382.         for(p=0; p<3 + s->transparency; p++){

  1383.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1384. 

  1385.             sample[p][0]= sample[p][1];

  1386.             sample[p][1]= temp;

  1387. 

  1388.             sample[p][1][-1]= sample[p][0][0  ];

  1389.             sample[p][0][ w]= sample[p][0][w-1];

  1390.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1391.         }

  1392.         for(x=0; x<w; x++){

  1393.             int g= sample[0][1][x];

  1394.             int b= sample[1][1][x];

  1395.             int r= sample[2][1][x];

  1396.             int a= sample[3][1][x];

  1397. 

  1398. //            assert(g>=0 && b>=0 && r>=0);

  1399. //            assert(g<256 && b<512 && r<512);

  1400. 

  1401.             b -= 0x100;

  1402.             r -= 0x100;

  1403.             g -= (b + r)>>2;

  1404.             b += g;

  1405.             r += g;

  1406. 

  1407.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1408.         }

  1409.     }

  1410. }

  1411. 

  1412. static int decode_slice(AVCodecContext *c, void *arg){

  1413.     FFV1Context *fs= *(void**)arg;

  1414.     FFV1Context *f= fs->avctx->priv_data;

  1415.     int width = fs->slice_width;

  1416.     int height= fs->slice_height;

  1417.     int x= fs->slice_x;

  1418.     int y= fs->slice_y;

  1419.     const int ps= (c->bits_per_raw_sample>8)+1;

  1420.     AVFrame * const p= &f->picture;

  1421. 

  1422.     av_assert1(width && height);

  1423.     if(f->colorspace==0){

  1424.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1425.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1426.         const int cx= x>>f->chroma_h_shift;

  1427.         const int cy= y>>f->chroma_v_shift;

  1428.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1429. 

  1430.         decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1431.         decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1432.     }else{

  1433.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1434.     }

  1435. 

  1436.     emms_c();

  1437. 

  1438.     return 0;

  1439. }

  1440. 

  1441. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1442.     int v;

  1443.     int i=0;

  1444.     uint8_t state[CONTEXT_SIZE];

  1445. 

  1446.     memset(state, 128, sizeof(state));

  1447. 

  1448.     for(v=0; i<128 ; v++){

  1449.         int len= get_symbol(c, state, 0) + 1;

  1450. 

  1451.         if(len + i > 128) return -1;

  1452. 

  1453.         while(len--){

  1454.             quant_table[i] = scale*v;

  1455.             i++;

  1456. //printf("%2d ",v);

  1457. //if(i%16==0) printf("\n");

  1458.         }

  1459.     }

  1460. 

  1461.     for(i=1; i<128; i++){

  1462.         quant_table[256-i]= -quant_table[i];

  1463.     }

  1464.     quant_table[128]= -quant_table[127];

  1465. 

  1466.     return 2*v - 1;

  1467. }

  1468. 

  1469. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1470.     int i;

  1471.     int context_count=1;

  1472. 

  1473.     for(i=0; i<5; i++){

  1474.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1475.         if(context_count > 32768U){

  1476.             return -1;

  1477.         }

  1478.     }

  1479.     return (context_count+1)/2;

  1480. }

  1481. 

  1482. static int read_extra_header(FFV1Context *f){

  1483.     RangeCoder * const c= &f->c;

  1484.     uint8_t state[CONTEXT_SIZE];

  1485.     int i, j, k;

  1486.     uint8_t state2[32][CONTEXT_SIZE];

  1487. 

  1488.     memset(state2, 128, sizeof(state2));

  1489.     memset(state, 128, sizeof(state));

  1490. 

  1491.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1492.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1493. 

  1494.     f->version= get_symbol(c, state, 0);

  1495.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1496.     if(f->ac>1){

  1497.         for(i=1; i<256; i++){

  1498.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1499.         }

  1500.     }

  1501.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1502.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1503.     get_rac(c, state); //no chroma = false

  1504.     f->chroma_h_shift= get_symbol(c, state, 0);

  1505.     f->chroma_v_shift= get_symbol(c, state, 0);

  1506.     f->transparency= get_rac(c, state);

  1507.     f->plane_count= 2 + f->transparency;

  1508.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1509.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1510.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1511.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1512.         return -1;

  1513.     }

  1514. 

  1515.     f->quant_table_count= get_symbol(c, state, 0);

  1516.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1517.         return -1;

  1518.     for(i=0; i<f->quant_table_count; i++){

  1519.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1520.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1521.             return -1;

  1522.         }

  1523.     }

  1524. 

  1525.     if(allocate_initial_states(f) < 0)

  1526.         return AVERROR(ENOMEM);

  1527. 

  1528.     for(i=0; i<f->quant_table_count; i++){

  1529.         if(get_rac(c, state)){

  1530.             for(j=0; j<f->context_count[i]; j++){

  1531.                 for(k=0; k<CONTEXT_SIZE; k++){

  1532.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1533.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1534.                 }

  1535.             }

  1536.         }

  1537.     }

  1538. 

  1539.     return 0;

  1540. }

  1541. 

  1542. static int read_header(FFV1Context *f){

  1543.     uint8_t state[CONTEXT_SIZE];

  1544.     int i, j, context_count;

  1545.     RangeCoder * const c= &f->slice_context[0]->c;

  1546. 

  1547.     memset(state, 128, sizeof(state));

  1548. 

  1549.     if(f->version < 2){

  1550.         f->version= get_symbol(c, state, 0);

  1551.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1552.         if(f->ac>1){

  1553.             for(i=1; i<256; i++){

  1554.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1555.             }

  1556.         }

  1557.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1558.         if(f->version>0)

  1559.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1560.         get_rac(c, state); //no chroma = false

  1561.         f->chroma_h_shift= get_symbol(c, state, 0);

  1562.         f->chroma_v_shift= get_symbol(c, state, 0);

  1563.         f->transparency= get_rac(c, state);

  1564.         f->plane_count= 2 + f->transparency;

  1565.     }

  1566. 

  1567.     if(f->colorspace==0){

  1568.         if(f->avctx->bits_per_raw_sample<=8){

  1569.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1570.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1571.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1572.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1573.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1574.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1575.             default:

  1576.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1577.                 return -1;

  1578.             }

  1579.         }else if(f->avctx->bits_per_raw_sample==9) {

  1580.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1581.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1582.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1583.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9 ; f->packed_at_lsb=1; break;

  1584.             default:

  1585.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1586.                 return -1;

  1587.             }

  1588.         }else if(f->avctx->bits_per_raw_sample==10) {

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

  1590.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1591.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; f->packed_at_lsb=1; break;

  1592.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; f->packed_at_lsb=1; break;

  1593.             default:

  1594.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1595.                 return -1;

  1596.             }

  1597.         }else {

  1598.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1599.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1600.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1601.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1602.             default:

  1603.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1604.                 return -1;

  1605.             }

  1606.         }

  1607.     }else if(f->colorspace==1){

  1608.         if(f->chroma_h_shift || f->chroma_v_shift){

  1609.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1610.             return -1;

  1611.         }

  1612.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1613.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1614.     }else{

  1615.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1616.         return -1;

  1617.     }

  1618. 

  1619. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1620.     if(f->version < 2){

  1621.         context_count= read_quant_tables(c, f->quant_table);

  1622.         if(context_count < 0){

  1623.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1624.                 return -1;

  1625.         }

  1626.     }else{

  1627.         f->slice_count= get_symbol(c, state, 0);

  1628.         if(f->slice_count > (unsigned)MAX_SLICES)

  1629.             return -1;

  1630.     }

  1631. 

  1632.     for(j=0; j<f->slice_count; j++){

  1633.         FFV1Context *fs= f->slice_context[j];

  1634.         fs->ac= f->ac;

  1635.         fs->packed_at_lsb= f->packed_at_lsb;

  1636. 

  1637.         if(f->version >= 2){

  1638.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1639.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1640.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1641.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1642. 

  1643.             fs->slice_x /= f->num_h_slices;

  1644.             fs->slice_y /= f->num_v_slices;

  1645.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1646.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1647.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1648.                 return -1;

  1649.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1650.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1651.                 return -1;

  1652.         }

  1653. 

  1654.         for(i=0; i<f->plane_count; i++){

  1655.             PlaneContext * const p= &fs->plane[i];

  1656. 

  1657.             if(f->version >= 2){

  1658.                 int idx=get_symbol(c, state, 0);

  1659.                 if(idx > (unsigned)f->quant_table_count){

  1660.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1661.                     return -1;

  1662.                 }

  1663.                 p->quant_table_index= idx;

  1664.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1665.                 context_count= f->context_count[idx];

  1666.             }else{

  1667.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1668.             }

  1669. 

  1670.             if(p->context_count < context_count){

  1671.                 av_freep(&p->state);

  1672.                 av_freep(&p->vlc_state);

  1673.             }

  1674.             p->context_count= context_count;

  1675.         }

  1676.     }

  1677. 

  1678.     return 0;

  1679. }

  1680. 

  1681. static av_cold int decode_init(AVCodecContext *avctx)

  1682. {

  1683.     FFV1Context *f = avctx->priv_data;

  1684. 

  1685.     common_init(avctx);

  1686. 

  1687.     if(avctx->extradata && read_extra_header(f) < 0)

  1688.         return -1;

  1689. 

  1690.     if(init_slice_contexts(f) < 0)

  1691.         return -1;

  1692. 

  1693.     return 0;

  1694. }

  1695. 

  1696. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1697.     const uint8_t *buf = avpkt->data;

  1698.     int buf_size = avpkt->size;

  1699.     FFV1Context *f = avctx->priv_data;

  1700.     RangeCoder * const c= &f->slice_context[0]->c;

  1701.     AVFrame * const p= &f->picture;

  1702.     int bytes_read, i;

  1703.     uint8_t keystate= 128;

  1704.     const uint8_t *buf_p;

  1705. 

  1706.     AVFrame *picture = data;

  1707. 

  1708.     /* release previously stored data */

  1709.     if (p->data[0])

  1710.         avctx->release_buffer(avctx, p);

  1711. 

  1712.     ff_init_range_decoder(c, buf, buf_size);

  1713.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1714. 

  1715. 

  1716.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1717.     if(get_rac(c, &keystate)){

  1718.         p->key_frame= 1;

  1719.         if(read_header(f) < 0)

  1720.             return -1;

  1721.         if(init_slice_state(f) < 0)

  1722.             return -1;

  1723. 

  1724.         clear_state(f);

  1725.     }else{

  1726.         p->key_frame= 0;

  1727.     }

  1728.     if(f->ac>1){

  1729.         int i;

  1730.         for(i=1; i<256; i++){

  1731.             c->one_state[i]= f->state_transition[i];

  1732.             c->zero_state[256-i]= 256-c->one_state[i];

  1733.         }

  1734.     }

  1735. 

  1736.     p->reference= 0;

  1737.     if(avctx->get_buffer(avctx, p) < 0){

  1738.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1739.         return -1;

  1740.     }

  1741. 

  1742.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1743.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1744. 

  1745.     if(!f->ac){

  1746.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1747.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1748. //printf("pos=%d\n", bytes_read);

  1749.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1750.     } else {

  1751.         bytes_read = 0; /* avoid warning */

  1752.     }

  1753. 

  1754.     buf_p= buf + buf_size;

  1755.     for(i=f->slice_count-1; i>0; i--){

  1756.         FFV1Context *fs= f->slice_context[i];

  1757.         int v= AV_RB24(buf_p-3)+3;

  1758.         if(buf_p - buf <= v){

  1759.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1760.             return -1;

  1761.         }

  1762.         buf_p -= v;

  1763.         if(fs->ac){

  1764.             ff_init_range_decoder(&fs->c, buf_p, v);

  1765.         }else{

  1766.             init_get_bits(&fs->gb, buf_p, v * 8);

  1767.         }

  1768.     }

  1769. 

  1770.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1771.     f->picture_number++;

  1772. 

  1773.     *picture= *p;

  1774.     *data_size = sizeof(AVFrame);

  1775. 

  1776.     return buf_size;

  1777. }

  1778. 

  1779. AVCodec ff_ffv1_decoder = {

  1780.     .name           = "ffv1",

  1781.     .type           = AVMEDIA_TYPE_VIDEO,

  1782.     .id             = CODEC_ID_FFV1,

  1783.     .priv_data_size = sizeof(FFV1Context),

  1784.     .init           = decode_init,

  1785.     .close          = common_end,

  1786.     .decode         = decode_frame,

  1787.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ | CODEC_CAP_SLICE_THREADS,

  1788.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1789. };

  1790. 

  1791. #if CONFIG_FFV1_ENCODER

  1792. AVCodec ff_ffv1_encoder = {

  1793.     .name           = "ffv1",

  1794.     .type           = AVMEDIA_TYPE_VIDEO,

  1795.     .id             = CODEC_ID_FFV1,

  1796.     .priv_data_size = sizeof(FFV1Context),

  1797.     .init           = encode_init,

  1798.     .encode         = encode_frame,

  1799.     .close          = common_end,

  1800.     .capabilities = CODEC_CAP_SLICE_THREADS,

  1801.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_0RGB32, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_NONE},

  1802.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1803. };

  1804. #endif