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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 flags;

  169.     int picture_number;

  170.     AVFrame picture;

  171.     int plane_count;

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

  173.     PlaneContext plane[MAX_PLANES];

  174.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  176.     int context_count[MAX_QUANT_TABLES];

  177.     uint8_t state_transition[256];

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

  179.     int run_index;

  180.     int colorspace;

  181.     int16_t *sample_buffer;

  182.     int gob_count;

  183.     int packed_at_lsb;

  184. 

  185.     int quant_table_count;

  186. 

  187.     DSPContext dsp;

  188. 

  189.     struct FFV1Context *slice_context[MAX_SLICES];

  190.     int slice_count;

  191.     int num_v_slices;

  192.     int num_h_slices;

  193.     int slice_width;

  194.     int slice_height;

  195.     int slice_x;

  196.     int slice_y;

  197. }FFV1Context;

  198. 

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

  200.     if(bits==8)

  201.         diff= (int8_t)diff;

  202.     else{

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

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

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

  206.     }

  207. 

  208.     return diff;

  209. }

  210. 

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

  212. {

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

  214.     const int  T= last[ 0];

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

  216. 

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

  218. }

  219. 

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

  221.                               int16_t *last, int16_t *last2)

  222. {

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

  224.     const int  T= last[ 0];

  225.     const int RT= last[ 1];

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

  227. 

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

  229.         const int TT= last2[0];

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

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

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

  233.     }else

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

  235. }

  236. 

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

  238.     int i,j,k,m;

  239.     double l2tab[256];

  240. 

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

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

  243. 

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

  245.         double best_len[256];

  246.         double p= i/256.0;

  247. 

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

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

  250. 

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

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

  253.             double len=0;

  254.             occ[j]=1.0;

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

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

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

  258.                     if(occ[m]){

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

  260.                                       + (1-p)*l2tab[256-m]);

  261.                     }

  262.                 }

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

  264.                     best_len[k]= len;

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

  266.                 }

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

  268.                     if(occ[m]){

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

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

  271.                     }

  272.                 }

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

  274.             }

  275.         }

  276.     }

  277. }

  278. 

  279. 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]){

  280.     int i;

  281. 

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

  283. do{\

  284.     if(rc_stat){\

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

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

  287.     }\

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

  289. }while(0)

  290. 

  291.     if(v){

  292.         const int a= FFABS(v);

  293.         const int e= av_log2(a);

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

  295.         if(e<=9){

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

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

  298.             }

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

  300. 

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

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

  303.             }

  304. 

  305.             if(is_signed)

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

  307.         }else{

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

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

  310.             }

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

  312. 

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

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

  315.             }

  316. 

  317.             if(is_signed)

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

  319.         }

  320.     }else{

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

  322.     }

  323. #undef put_rac

  324. }

  325. 

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

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

  328. }

  329. 

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

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

  332.         return 0;

  333.     else{

  334.         int i, e, a;

  335.         e= 0;

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

  337.             e++;

  338.         }

  339. 

  340.         a= 1;

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

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

  343.         }

  344. 

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

  346.         return (a^e)-e;

  347.     }

  348. }

  349. 

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

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

  352. }

  353. 

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

  355.     int drift= state->drift;

  356.     int count= state->count;

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

  358.     drift += v;

  359. 

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

  361.         count >>= 1;

  362.         drift >>= 1;

  363.         state->error_sum >>= 1;

  364.     }

  365.     count++;

  366. 

  367.     if(drift <= -count){

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

  369. 

  370.         drift += count;

  371.         if(drift <= -count)

  372.             drift= -count + 1;

  373.     }else if(drift > 0){

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

  375. 

  376.         drift -= count;

  377.         if(drift > 0)

  378.             drift= 0;

  379.     }

  380. 

  381.     state->drift= drift;

  382.     state->count= count;

  383. }

  384. 

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

  386.     int i, k, code;

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

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

  389. 

  390.     i= state->count;

  391.     k=0;

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

  393.         k++;

  394.         i += i;

  395.     }

  396. 

  397.     assert(k<=8);

  398. 

  399. #if 0 // JPEG LS

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

  401.     else                                         code= v;

  402. #else

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

  404. #endif

  405. 

  406. //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);

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

  408. 

  409.     update_vlc_state(state, v);

  410. }

  411. 

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

  413.     int k, i, v, ret;

  414. 

  415.     i= state->count;

  416.     k=0;

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

  418.         k++;

  419.         i += i;

  420.     }

  421. 

  422.     assert(k<=8);

  423. 

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

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

  426. 

  427. #if 0 // JPEG LS

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

  429. #else

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

  431. #endif

  432. 

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

  434. 

  435.     update_vlc_state(state, v);

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

  437.     return ret;

  438. }

  439. 

  440. #if CONFIG_FFV1_ENCODER

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

  442.                                         int16_t *sample[2],

  443.                                         int plane_index, int bits)

  444. {

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

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

  447.     int x;

  448.     int run_index= s->run_index;

  449.     int run_count=0;

  450.     int run_mode=0;

  451. 

  452.     if(s->ac){

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

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

  455.             return -1;

  456.         }

  457.     }else{

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

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

  460.             return -1;

  461.         }

  462.     }

  463. 

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

  465.         int diff, context;

  466. 

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

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

  469. 

  470.         if(context < 0){

  471.             context = -context;

  472.             diff= -diff;

  473.         }

  474. 

  475.         diff= fold(diff, bits);

  476. 

  477.         if(s->ac){

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

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

  480.             }else{

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

  482.             }

  483.         }else{

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

  485. 

  486.             if(run_mode){

  487. 

  488.                 if(diff){

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

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

  491.                         run_index++;

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

  493.                     }

  494. 

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

  496.                     if(run_index) run_index--;

  497.                     run_count=0;

  498.                     run_mode=0;

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

  500.                 }else{

  501.                     run_count++;

  502.                 }

  503.             }

  504. 

  505. //            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));

  506. 

  507.             if(run_mode == 0)

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

  509.         }

  510.     }

  511.     if(run_mode){

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

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

  514.             run_index++;

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

  516.         }

  517. 

  518.         if(run_count)

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

  520.     }

  521.     s->run_index= run_index;

  522. 

  523.     return 0;

  524. }

  525. 

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

  527.     int x,y,i;

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

  529.     int16_t *sample[3];

  530.     s->run_index=0;

  531. 

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

  533. 

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

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

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

  537. 

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

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

  540. //{START_TIMER

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

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

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

  544.             }

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

  546.         }else{

  547.             if(s->packed_at_lsb){

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

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

  550.                 }

  551.             }else{

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

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

  554.                 }

  555.             }

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

  557.         }

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

  559.     }

  560. }

  561. 

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

  563.     int x, y, p, i;

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

  565.     int16_t *sample[3][3];

  566.     s->run_index=0;

  567. 

  568.     memset(s->sample_buffer, 0, ring_size*3*(w+6)*sizeof(*s->sample_buffer));

  569. 

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

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

  572.             for(p=0; p<3; p++)

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

  574. 

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

  576.             int v= src[x + stride*y];

  577.             int b= v&0xFF;

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

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

  580. 

  581.             b -= g;

  582.             r -= g;

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

  584.             b += 0x100;

  585.             r += 0x100;

  586. 

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

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

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

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

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

  592.         }

  593.         for(p=0; p<3; p++){

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

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

  596.             encode_line(s, w, sample[p], FFMIN(p, 1), 9);

  597.         }

  598.     }

  599. }

  600. 

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

  602.     int last=0;

  603.     int i;

  604.     uint8_t state[CONTEXT_SIZE];

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

  606. 

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

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

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

  610.             last= i;

  611.         }

  612.     }

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

  614. }

  615. 

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

  617.     int i;

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

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

  620. }

  621. 

  622. static void write_header(FFV1Context *f){

  623.     uint8_t state[CONTEXT_SIZE];

  624.     int i, j;

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

  626. 

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

  628. 

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

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

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

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

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

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

  635.             }

  636.         }

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

  638.         if(f->version>0)

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

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

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

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

  643.         put_rac(c, state, 0); //no transparency plane

  644. 

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

  646.     }else{

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

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

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

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

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

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

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

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

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

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

  657.             }

  658.         }

  659.     }

  660. }

  661. #endif /* CONFIG_FFV1_ENCODER */

  662. 

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

  664.     FFV1Context *s = avctx->priv_data;

  665. 

  666.     s->avctx= avctx;

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

  668. 

  669.     avcodec_get_frame_defaults(&s->picture);

  670. 

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

  672. 

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

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

  675. 

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

  677.     //defaults

  678.     s->num_h_slices=1;

  679.     s->num_v_slices=1;

  680. 

  681. 

  682.     return 0;

  683. }

  684. 

  685. static int init_slice_state(FFV1Context *f){

  686.     int i, j;

  687. 

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

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

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

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

  692. 

  693.             if(fs->ac){

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

  695.                 if(!p->    state)

  696.                     return AVERROR(ENOMEM);

  697.             }else{

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

  699.                 if(!p->vlc_state)

  700.                     return AVERROR(ENOMEM);

  701.             }

  702.         }

  703. 

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

  705.             //FIXME only redo if state_transition changed

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

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

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

  709.             }

  710.         }

  711.     }

  712. 

  713.     return 0;

  714. }

  715. 

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

  717.     int i;

  718. 

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

  720. 

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

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

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

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

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

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

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

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

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

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

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

  732. 

  733.         fs->slice_width = sxe - sxs;

  734.         fs->slice_height= sye - sys;

  735.         fs->slice_x     = sxs;

  736.         fs->slice_y     = sys;

  737. 

  738.         fs->sample_buffer = av_malloc(9 * (fs->width+6) * sizeof(*fs->sample_buffer));

  739.         if (!fs->sample_buffer)

  740.             return AVERROR(ENOMEM);

  741.     }

  742.     return 0;

  743. }

  744. 

  745. static int allocate_initial_states(FFV1Context *f){

  746.     int i;

  747. 

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

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

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

  751.             return AVERROR(ENOMEM);

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

  753.     }

  754.     return 0;

  755. }

  756. 

  757. #if CONFIG_FFV1_ENCODER

  758. static int write_extra_header(FFV1Context *f){

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

  760.     uint8_t state[CONTEXT_SIZE];

  761.     int i, j, k;

  762.     uint8_t state2[32][CONTEXT_SIZE];

  763. 

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

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

  766. 

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

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

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

  770. 

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

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

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

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

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

  776.         }

  777.     }

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

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

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

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

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

  783.     put_rac(c, state, 0); //no transparency plane

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

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

  786. 

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

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

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

  790. 

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

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

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

  794.                 break;

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

  796.             put_rac(c, state, 1);

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

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

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

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

  801.                 }

  802.             }

  803.         }else{

  804.             put_rac(c, state, 0);

  805.         }

  806.     }

  807. 

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

  809. 

  810.     return 0;

  811. }

  812. 

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

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

  815. 

  816.     do{

  817.         changed=0;

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

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

  820. #define COST(old, new) \

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

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

  823. 

  824. #define COST2(old, new) \

  825.     COST(old, new)\

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

  827. 

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

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

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

  831.                     int j;

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

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

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

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

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

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

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

  839.                     }

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

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

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

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

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

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

  846.                         }

  847.                     }

  848.                     print=changed=1;

  849.                 }

  850.             }

  851.         }

  852.     }while(changed);

  853.     return print;

  854. }

  855. 

  856. static av_cold int encode_init(AVCodecContext *avctx)

  857. {

  858.     FFV1Context *s = avctx->priv_data;

  859.     int i, j, k, m;

  860. 

  861.     common_init(avctx);

  862. 

  863.     s->version=0;

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

  865. 

  866.     if(s->ac>1)

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

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

  869. 

  870.     s->plane_count=2;

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

  872.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  882.         }else{

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

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

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

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

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

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

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

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

  891.         }

  892.     }

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

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

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

  896. 

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

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

  899. 

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

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

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

  903.     }

  904. 

  905.     if(allocate_initial_states(s) < 0)

  906.         return AVERROR(ENOMEM);

  907. 

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

  909.     switch(avctx->pix_fmt){

  910.     case PIX_FMT_YUV420P9:

  911.     case PIX_FMT_YUV420P10:

  912.     case PIX_FMT_YUV422P10:

  913.         s->packed_at_lsb = 1;

  914.     case PIX_FMT_YUV444P16:

  915.     case PIX_FMT_YUV422P16:

  916.     case PIX_FMT_YUV420P16:

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

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

  919.             return -1;

  920.         }

  921.         if(!s->ac){

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

  923.             return -1;

  924.         }

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

  926.     case PIX_FMT_YUV444P:

  927.     case PIX_FMT_YUV422P:

  928.     case PIX_FMT_YUV420P:

  929.     case PIX_FMT_YUV411P:

  930.     case PIX_FMT_YUV410P:

  931.         s->colorspace= 0;

  932.         break;

  933.     case PIX_FMT_RGB32:

  934.         s->colorspace= 1;

  935.         break;

  936.     default:

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

  938.         return -1;

  939.     }

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

  941. 

  942.     s->picture_number=0;

  943. 

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

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

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

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

  948.                 return AVERROR(ENOMEM);

  949.         }

  950.     }

  951.     if(avctx->stats_in){

  952.         char *p= avctx->stats_in;

  953.         uint8_t best_state[256][256];

  954.         int gob_count=0;

  955.         char *next;

  956. 

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

  958. 

  959.         for(;;){

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

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

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

  963.                     if(next==p){

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

  965.                         return -1;

  966.                     }

  967.                     p=next;

  968.                 }

  969.             }

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

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

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

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

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

  975.                             if(next==p){

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

  977.                                 return -1;

  978.                             }

  979.                             p=next;

  980.                         }

  981.                     }

  982.                 }

  983.             }

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

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

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

  987.                 return -1;

  988.             }

  989.             p=next;

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

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

  992.         }

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

  994. 

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

  996. 

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

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

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

  1000.                     double p= 128;

  1001.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1002.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1003.                     }

  1004.                     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)];

  1005.                 }

  1006.             }

  1007.         }

  1008.     }

  1009. 

  1010.     if(s->version>1){

  1011.         s->num_h_slices=2;

  1012.         s->num_v_slices=2;

  1013.         write_extra_header(s);

  1014.     }

  1015. 

  1016.     if(init_slice_contexts(s) < 0)

  1017.         return -1;

  1018.     if(init_slice_state(s) < 0)

  1019.         return -1;

  1020. 

  1021. #define STATS_OUT_SIZE 1024*1024*6

  1022.     if(avctx->flags & CODEC_FLAG_PASS1){

  1023.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1024.         for(i=0; i<s->quant_table_count; i++){

  1025.             for(j=0; j<s->slice_count; j++){

  1026.                 FFV1Context *sf= s->slice_context[j];

  1027.                 av_assert0(!sf->rc_stat2[i]);

  1028.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1029.                 if(!sf->rc_stat2[i])

  1030.                     return AVERROR(ENOMEM);

  1031.             }

  1032.         }

  1033.     }

  1034. 

  1035.     return 0;

  1036. }

  1037. #endif /* CONFIG_FFV1_ENCODER */

  1038. 

  1039. 

  1040. static void clear_state(FFV1Context *f){

  1041.     int i, si, j;

  1042. 

  1043.     for(si=0; si<f->slice_count; si++){

  1044.         FFV1Context *fs= f->slice_context[si];

  1045.         for(i=0; i<f->plane_count; i++){

  1046.             PlaneContext *p= &fs->plane[i];

  1047. 

  1048.             p->interlace_bit_state[0]= 128;

  1049.             p->interlace_bit_state[1]= 128;

  1050. 

  1051.             if(fs->ac){

  1052.                 if(f->initial_states[p->quant_table_index]){

  1053.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1054.                 }else

  1055.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1056.             }else{

  1057.             for(j=0; j<p->context_count; j++){

  1058.                     p->vlc_state[j].drift= 0;

  1059.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1060.                     p->vlc_state[j].bias= 0;

  1061.                     p->vlc_state[j].count= 1;

  1062.             }

  1063.             }

  1064.         }

  1065.     }

  1066. }

  1067. 

  1068. #if CONFIG_FFV1_ENCODER

  1069. static int encode_slice(AVCodecContext *c, void *arg){

  1070.     FFV1Context *fs= *(void**)arg;

  1071.     FFV1Context *f= fs->avctx->priv_data;

  1072.     int width = fs->slice_width;

  1073.     int height= fs->slice_height;

  1074.     int x= fs->slice_x;

  1075.     int y= fs->slice_y;

  1076.     AVFrame * const p= &f->picture;

  1077.     const int ps= (c->bits_per_raw_sample>8)+1;

  1078. 

  1079.     if(f->colorspace==0){

  1080.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1081.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1082.         const int cx= x>>f->chroma_h_shift;

  1083.         const int cy= y>>f->chroma_v_shift;

  1084. 

  1085.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1086. 

  1087.         encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1088.         encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1089.     }else{

  1090.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1091.     }

  1092.     emms_c();

  1093. 

  1094.     return 0;

  1095. }

  1096. 

  1097. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  1098.     FFV1Context *f = avctx->priv_data;

  1099.     RangeCoder * const c= &f->slice_context[0]->c;

  1100.     AVFrame *pict = data;

  1101.     AVFrame * const p= &f->picture;

  1102.     int used_count= 0;

  1103.     uint8_t keystate=128;

  1104.     uint8_t *buf_p;

  1105.     int i;

  1106. 

  1107.     ff_init_range_encoder(c, buf, buf_size);

  1108.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1109. 

  1110.     *p = *pict;

  1111.     p->pict_type= AV_PICTURE_TYPE_I;

  1112. 

  1113.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1114.         put_rac(c, &keystate, 1);

  1115.         p->key_frame= 1;

  1116.         f->gob_count++;

  1117.         write_header(f);

  1118.         clear_state(f);

  1119.     }else{

  1120.         put_rac(c, &keystate, 0);

  1121.         p->key_frame= 0;

  1122.     }

  1123. 

  1124.     if(!f->ac){

  1125.         used_count += ff_rac_terminate(c);

  1126. //printf("pos=%d\n", used_count);

  1127.         init_put_bits(&f->slice_context[0]->pb, buf + used_count, buf_size - used_count);

  1128.     }else if (f->ac>1){

  1129.         int i;

  1130.         for(i=1; i<256; i++){

  1131.             c->one_state[i]= f->state_transition[i];

  1132.             c->zero_state[256-i]= 256-c->one_state[i];

  1133.         }

  1134.     }

  1135. 

  1136.     for(i=1; i<f->slice_count; i++){

  1137.         FFV1Context *fs= f->slice_context[i];

  1138.         uint8_t *start= buf + (buf_size-used_count)*i/f->slice_count;

  1139.         int len= buf_size/f->slice_count;

  1140. 

  1141.         if(fs->ac){

  1142.             ff_init_range_encoder(&fs->c, start, len);

  1143.         }else{

  1144.             init_put_bits(&fs->pb, start, len);

  1145.         }

  1146.     }

  1147.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1148. 

  1149.     buf_p=buf;

  1150.     for(i=0; i<f->slice_count; i++){

  1151.         FFV1Context *fs= f->slice_context[i];

  1152.         int bytes;

  1153. 

  1154.         if(fs->ac){

  1155.             uint8_t state=128;

  1156.             put_rac(&fs->c, &state, 0);

  1157.             bytes= ff_rac_terminate(&fs->c);

  1158.         }else{

  1159.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1160.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1161.             used_count= 0;

  1162.         }

  1163.         if(i>0){

  1164.             av_assert0(bytes < buf_size/f->slice_count);

  1165.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1166.             av_assert0(bytes < (1<<24));

  1167.             AV_WB24(buf_p+bytes, bytes);

  1168.             bytes+=3;

  1169.         }

  1170.         buf_p += bytes;

  1171.     }

  1172. 

  1173.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1174.         int j, k, m;

  1175.         char *p= avctx->stats_out;

  1176.         char *end= p + STATS_OUT_SIZE;

  1177. 

  1178.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1179.         for(i=0; i<f->quant_table_count; i++)

  1180.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1181. 

  1182.         for(j=0; j<f->slice_count; j++){

  1183.             FFV1Context *fs= f->slice_context[j];

  1184.             for(i=0; i<256; i++){

  1185.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1186.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1187.             }

  1188.             for(i=0; i<f->quant_table_count; i++){

  1189.                 for(k=0; k<f->context_count[i]; k++){

  1190.                     for(m=0; m<32; m++){

  1191.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1192.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1193.                     }

  1194.                 }

  1195.             }

  1196.         }

  1197. 

  1198.         for(j=0; j<256; j++){

  1199.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1200.             p+= strlen(p);

  1201.         }

  1202.         snprintf(p, end-p, "\n");

  1203. 

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

  1205.             for(j=0; j<f->context_count[i]; j++){

  1206.                 for(m=0; m<32; m++){

  1207.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1208.                     p+= strlen(p);

  1209.                 }

  1210.             }

  1211.         }

  1212.         snprintf(p, end-p, "%d\n", f->gob_count);

  1213.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1214.         avctx->stats_out[0] = '\0';

  1215. 

  1216.     f->picture_number++;

  1217.     return buf_p-buf;

  1218. }

  1219. #endif /* CONFIG_FFV1_ENCODER */

  1220. 

  1221. static av_cold int common_end(AVCodecContext *avctx){

  1222.     FFV1Context *s = avctx->priv_data;

  1223.     int i, j;

  1224. 

  1225.     if (avctx->codec->decode && s->picture.data[0])

  1226.         avctx->release_buffer(avctx, &s->picture);

  1227. 

  1228.     for(j=0; j<s->slice_count; j++){

  1229.         FFV1Context *fs= s->slice_context[j];

  1230.         for(i=0; i<s->plane_count; i++){

  1231.             PlaneContext *p= &fs->plane[i];

  1232. 

  1233.             av_freep(&p->state);

  1234.             av_freep(&p->vlc_state);

  1235.         }

  1236.         av_freep(&fs->sample_buffer);

  1237.     }

  1238. 

  1239.     av_freep(&avctx->stats_out);

  1240.     for(j=0; j<s->quant_table_count; j++){

  1241.         av_freep(&s->initial_states[j]);

  1242.         for(i=0; i<s->slice_count; i++){

  1243.             FFV1Context *sf= s->slice_context[i];

  1244.             av_freep(&sf->rc_stat2[j]);

  1245.         }

  1246.         av_freep(&s->rc_stat2[j]);

  1247.     }

  1248. 

  1249.     for(i=0; i<s->slice_count; i++){

  1250.         av_freep(&s->slice_context[i]);

  1251.     }

  1252. 

  1253.     return 0;

  1254. }

  1255. 

  1256. static av_always_inline void decode_line(FFV1Context *s, int w,

  1257.                                          int16_t *sample[2],

  1258.                                          int plane_index, int bits)

  1259. {

  1260.     PlaneContext * const p= &s->plane[plane_index];

  1261.     RangeCoder * const c= &s->c;

  1262.     int x;

  1263.     int run_count=0;

  1264.     int run_mode=0;

  1265.     int run_index= s->run_index;

  1266. 

  1267.     for(x=0; x<w; x++){

  1268.         int diff, context, sign;

  1269. 

  1270.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1271.         if(context < 0){

  1272.             context= -context;

  1273.             sign=1;

  1274.         }else

  1275.             sign=0;

  1276. 

  1277.         av_assert2(context < p->context_count);

  1278. 

  1279.         if(s->ac){

  1280.             diff= get_symbol_inline(c, p->state[context], 1);

  1281.         }else{

  1282.             if(context == 0 && run_mode==0) run_mode=1;

  1283. 

  1284.             if(run_mode){

  1285.                 if(run_count==0 && run_mode==1){

  1286.                     if(get_bits1(&s->gb)){

  1287.                         run_count = 1<<ff_log2_run[run_index];

  1288.                         if(x + run_count <= w) run_index++;

  1289.                     }else{

  1290.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1291.                         else run_count=0;

  1292.                         if(run_index) run_index--;

  1293.                         run_mode=2;

  1294.                     }

  1295.                 }

  1296.                 run_count--;

  1297.                 if(run_count < 0){

  1298.                     run_mode=0;

  1299.                     run_count=0;

  1300.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1301.                     if(diff>=0) diff++;

  1302.                 }else

  1303.                     diff=0;

  1304.             }else

  1305.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1306. 

  1307. //            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));

  1308.         }

  1309. 

  1310.         if(sign) diff= -diff;

  1311. 

  1312.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1313.     }

  1314.     s->run_index= run_index;

  1315. }

  1316. 

  1317. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1318.     int x, y;

  1319.     int16_t *sample[2];

  1320.     sample[0]=s->sample_buffer    +3;

  1321.     sample[1]=s->sample_buffer+w+6+3;

  1322. 

  1323.     s->run_index=0;

  1324. 

  1325.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1326. 

  1327.     for(y=0; y<h; y++){

  1328.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1329. 

  1330.         sample[0]= sample[1];

  1331.         sample[1]= temp;

  1332. 

  1333.         sample[1][-1]= sample[0][0  ];

  1334.         sample[0][ w]= sample[0][w-1];

  1335. 

  1336. //{START_TIMER

  1337.         if(s->avctx->bits_per_raw_sample <= 8){

  1338.             decode_line(s, w, sample, plane_index, 8);

  1339.             for(x=0; x<w; x++){

  1340.                 src[x + stride*y]= sample[1][x];

  1341.             }

  1342.         }else{

  1343.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1344.             if(s->packed_at_lsb){

  1345.                 for(x=0; x<w; x++){

  1346.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1347.                 }

  1348.             }else{

  1349.                 for(x=0; x<w; x++){

  1350.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1351.                 }

  1352.             }

  1353.         }

  1354. //STOP_TIMER("decode-line")}

  1355.     }

  1356. }

  1357. 

  1358. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1359.     int x, y, p;

  1360.     int16_t *sample[3][2];

  1361.     for(x=0; x<3; x++){

  1362.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1363.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1364.     }

  1365. 

  1366.     s->run_index=0;

  1367. 

  1368.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1369. 

  1370.     for(y=0; y<h; y++){

  1371.         for(p=0; p<3; p++){

  1372.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1373. 

  1374.             sample[p][0]= sample[p][1];

  1375.             sample[p][1]= temp;

  1376. 

  1377.             sample[p][1][-1]= sample[p][0][0  ];

  1378.             sample[p][0][ w]= sample[p][0][w-1];

  1379.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1380.         }

  1381.         for(x=0; x<w; x++){

  1382.             int g= sample[0][1][x];

  1383.             int b= sample[1][1][x];

  1384.             int r= sample[2][1][x];

  1385. 

  1386. //            assert(g>=0 && b>=0 && r>=0);

  1387. //            assert(g<256 && b<512 && r<512);

  1388. 

  1389.             b -= 0x100;

  1390.             r -= 0x100;

  1391.             g -= (b + r)>>2;

  1392.             b += g;

  1393.             r += g;

  1394. 

  1395.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1396.         }

  1397.     }

  1398. }

  1399. 

  1400. static int decode_slice(AVCodecContext *c, void *arg){

  1401.     FFV1Context *fs= *(void**)arg;

  1402.     FFV1Context *f= fs->avctx->priv_data;

  1403.     int width = fs->slice_width;

  1404.     int height= fs->slice_height;

  1405.     int x= fs->slice_x;

  1406.     int y= fs->slice_y;

  1407.     const int ps= (c->bits_per_raw_sample>8)+1;

  1408.     AVFrame * const p= &f->picture;

  1409. 

  1410.     av_assert1(width && height);

  1411.     if(f->colorspace==0){

  1412.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1413.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1414.         const int cx= x>>f->chroma_h_shift;

  1415.         const int cy= y>>f->chroma_v_shift;

  1416.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1417. 

  1418.         decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1419.         decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1420.     }else{

  1421.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1422.     }

  1423. 

  1424.     emms_c();

  1425. 

  1426.     return 0;

  1427. }

  1428. 

  1429. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1430.     int v;

  1431.     int i=0;

  1432.     uint8_t state[CONTEXT_SIZE];

  1433. 

  1434.     memset(state, 128, sizeof(state));

  1435. 

  1436.     for(v=0; i<128 ; v++){

  1437.         int len= get_symbol(c, state, 0) + 1;

  1438. 

  1439.         if(len + i > 128) return -1;

  1440. 

  1441.         while(len--){

  1442.             quant_table[i] = scale*v;

  1443.             i++;

  1444. //printf("%2d ",v);

  1445. //if(i%16==0) printf("\n");

  1446.         }

  1447.     }

  1448. 

  1449.     for(i=1; i<128; i++){

  1450.         quant_table[256-i]= -quant_table[i];

  1451.     }

  1452.     quant_table[128]= -quant_table[127];

  1453. 

  1454.     return 2*v - 1;

  1455. }

  1456. 

  1457. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1458.     int i;

  1459.     int context_count=1;

  1460. 

  1461.     for(i=0; i<5; i++){

  1462.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1463.         if(context_count > 32768U){

  1464.             return -1;

  1465.         }

  1466.     }

  1467.     return (context_count+1)/2;

  1468. }

  1469. 

  1470. static int read_extra_header(FFV1Context *f){

  1471.     RangeCoder * const c= &f->c;

  1472.     uint8_t state[CONTEXT_SIZE];

  1473.     int i, j, k;

  1474.     uint8_t state2[32][CONTEXT_SIZE];

  1475. 

  1476.     memset(state2, 128, sizeof(state2));

  1477.     memset(state, 128, sizeof(state));

  1478. 

  1479.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1480.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1481. 

  1482.     f->version= get_symbol(c, state, 0);

  1483.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1484.     if(f->ac>1){

  1485.         for(i=1; i<256; i++){

  1486.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1487.         }

  1488.     }

  1489.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1490.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1491.     get_rac(c, state); //no chroma = false

  1492.     f->chroma_h_shift= get_symbol(c, state, 0);

  1493.     f->chroma_v_shift= get_symbol(c, state, 0);

  1494.     get_rac(c, state); //transparency plane

  1495.     f->plane_count= 2;

  1496.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1497.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1498.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1499.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1500.         return -1;

  1501.     }

  1502. 

  1503.     f->quant_table_count= get_symbol(c, state, 0);

  1504.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1505.         return -1;

  1506.     for(i=0; i<f->quant_table_count; i++){

  1507.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1508.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1509.             return -1;

  1510.         }

  1511.     }

  1512. 

  1513.     if(allocate_initial_states(f) < 0)

  1514.         return AVERROR(ENOMEM);

  1515. 

  1516.     for(i=0; i<f->quant_table_count; i++){

  1517.         if(get_rac(c, state)){

  1518.             for(j=0; j<f->context_count[i]; j++){

  1519.                 for(k=0; k<CONTEXT_SIZE; k++){

  1520.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1521.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1522.                 }

  1523.             }

  1524.         }

  1525.     }

  1526. 

  1527.     return 0;

  1528. }

  1529. 

  1530. static int read_header(FFV1Context *f){

  1531.     uint8_t state[CONTEXT_SIZE];

  1532.     int i, j, context_count;

  1533.     RangeCoder * const c= &f->slice_context[0]->c;

  1534. 

  1535.     memset(state, 128, sizeof(state));

  1536. 

  1537.     if(f->version < 2){

  1538.         f->version= get_symbol(c, state, 0);

  1539.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1540.         if(f->ac>1){

  1541.             for(i=1; i<256; i++){

  1542.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1543.             }

  1544.         }

  1545.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1546.         if(f->version>0)

  1547.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1548.         get_rac(c, state); //no chroma = false

  1549.         f->chroma_h_shift= get_symbol(c, state, 0);

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

  1551.         get_rac(c, state); //transparency plane

  1552.         f->plane_count= 2;

  1553.     }

  1554. 

  1555.     if(f->colorspace==0){

  1556.         if(f->avctx->bits_per_raw_sample<=8){

  1557.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1558.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1559.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1560.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1561.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1562.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1563.             default:

  1564.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1565.                 return -1;

  1566.             }

  1567.         }else if(f->avctx->bits_per_raw_sample==9) {

  1568.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1569.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1570.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1571.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9 ; f->packed_at_lsb=1; break;

  1572.             default:

  1573.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1574.                 return -1;

  1575.             }

  1576.         }else if(f->avctx->bits_per_raw_sample==10) {

  1577.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1578.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1579.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; f->packed_at_lsb=1; break;

  1580.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; f->packed_at_lsb=1; break;

  1581.             default:

  1582.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1583.                 return -1;

  1584.             }

  1585.         }else {

  1586.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1587.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1588.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1589.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1590.             default:

  1591.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1592.                 return -1;

  1593.             }

  1594.         }

  1595.     }else if(f->colorspace==1){

  1596.         if(f->chroma_h_shift || f->chroma_v_shift){

  1597.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1598.             return -1;

  1599.         }

  1600.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1601.     }else{

  1602.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1603.         return -1;

  1604.     }

  1605. 

  1606. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1607.     if(f->version < 2){

  1608.         context_count= read_quant_tables(c, f->quant_table);

  1609.         if(context_count < 0){

  1610.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1611.                 return -1;

  1612.         }

  1613.     }else{

  1614.         f->slice_count= get_symbol(c, state, 0);

  1615.         if(f->slice_count > (unsigned)MAX_SLICES)

  1616.             return -1;

  1617.     }

  1618. 

  1619.     for(j=0; j<f->slice_count; j++){

  1620.         FFV1Context *fs= f->slice_context[j];

  1621.         fs->ac= f->ac;

  1622.         fs->packed_at_lsb= f->packed_at_lsb;

  1623. 

  1624.         if(f->version >= 2){

  1625.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1626.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1627.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1628.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1629. 

  1630.             fs->slice_x /= f->num_h_slices;

  1631.             fs->slice_y /= f->num_v_slices;

  1632.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1633.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1634.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1635.                 return -1;

  1636.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1637.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1638.                 return -1;

  1639.         }

  1640. 

  1641.         for(i=0; i<f->plane_count; i++){

  1642.             PlaneContext * const p= &fs->plane[i];

  1643. 

  1644.             if(f->version >= 2){

  1645.                 int idx=get_symbol(c, state, 0);

  1646.                 if(idx > (unsigned)f->quant_table_count){

  1647.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1648.                     return -1;

  1649.                 }

  1650.                 p->quant_table_index= idx;

  1651.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1652.                 context_count= f->context_count[idx];

  1653.             }else{

  1654.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1655.             }

  1656. 

  1657.             if(p->context_count < context_count){

  1658.                 av_freep(&p->state);

  1659.                 av_freep(&p->vlc_state);

  1660.             }

  1661.             p->context_count= context_count;

  1662.         }

  1663.     }

  1664. 

  1665.     return 0;

  1666. }

  1667. 

  1668. static av_cold int decode_init(AVCodecContext *avctx)

  1669. {

  1670.     FFV1Context *f = avctx->priv_data;

  1671. 

  1672.     common_init(avctx);

  1673. 

  1674.     if(avctx->extradata && read_extra_header(f) < 0)

  1675.         return -1;

  1676. 

  1677.     if(init_slice_contexts(f) < 0)

  1678.         return -1;

  1679. 

  1680.     return 0;

  1681. }

  1682. 

  1683. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1684.     const uint8_t *buf = avpkt->data;

  1685.     int buf_size = avpkt->size;

  1686.     FFV1Context *f = avctx->priv_data;

  1687.     RangeCoder * const c= &f->slice_context[0]->c;

  1688.     AVFrame * const p= &f->picture;

  1689.     int bytes_read, i;

  1690.     uint8_t keystate= 128;

  1691.     const uint8_t *buf_p;

  1692. 

  1693.     AVFrame *picture = data;

  1694. 

  1695.     /* release previously stored data */

  1696.     if (p->data[0])

  1697.         avctx->release_buffer(avctx, p);

  1698. 

  1699.     ff_init_range_decoder(c, buf, buf_size);

  1700.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1701. 

  1702. 

  1703.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1704.     if(get_rac(c, &keystate)){

  1705.         p->key_frame= 1;

  1706.         if(read_header(f) < 0)

  1707.             return -1;

  1708.         if(init_slice_state(f) < 0)

  1709.             return -1;

  1710. 

  1711.         clear_state(f);

  1712.     }else{

  1713.         p->key_frame= 0;

  1714.     }

  1715.     if(f->ac>1){

  1716.         int i;

  1717.         for(i=1; i<256; i++){

  1718.             c->one_state[i]= f->state_transition[i];

  1719.             c->zero_state[256-i]= 256-c->one_state[i];

  1720.         }

  1721.     }

  1722. 

  1723.     p->reference= 0;

  1724.     if(avctx->get_buffer(avctx, p) < 0){

  1725.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1726.         return -1;

  1727.     }

  1728. 

  1729.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1730.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1731. 

  1732.     if(!f->ac){

  1733.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1734.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1735. //printf("pos=%d\n", bytes_read);

  1736.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1737.     } else {

  1738.         bytes_read = 0; /* avoid warning */

  1739.     }

  1740. 

  1741.     buf_p= buf + buf_size;

  1742.     for(i=f->slice_count-1; i>0; i--){

  1743.         FFV1Context *fs= f->slice_context[i];

  1744.         int v= AV_RB24(buf_p-3)+3;

  1745.         if(buf_p - buf <= v){

  1746.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1747.             return -1;

  1748.         }

  1749.         buf_p -= v;

  1750.         if(fs->ac){

  1751.             ff_init_range_decoder(&fs->c, buf_p, v);

  1752.         }else{

  1753.             init_get_bits(&fs->gb, buf_p, v * 8);

  1754.         }

  1755.     }

  1756. 

  1757.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1758.     f->picture_number++;

  1759. 

  1760.     *picture= *p;

  1761.     *data_size = sizeof(AVFrame);

  1762. 

  1763.     return buf_size;

  1764. }

  1765. 

  1766. AVCodec ff_ffv1_decoder = {

  1767.     .name           = "ffv1",

  1768.     .type           = AVMEDIA_TYPE_VIDEO,

  1769.     .id             = CODEC_ID_FFV1,

  1770.     .priv_data_size = sizeof(FFV1Context),

  1771.     .init           = decode_init,

  1772.     .close          = common_end,

  1773.     .decode         = decode_frame,

  1774.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ | CODEC_CAP_SLICE_THREADS,

  1775.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1776. };

  1777. 

  1778. #if CONFIG_FFV1_ENCODER

  1779. AVCodec ff_ffv1_encoder = {

  1780.     .name           = "ffv1",

  1781.     .type           = AVMEDIA_TYPE_VIDEO,

  1782.     .id             = CODEC_ID_FFV1,

  1783.     .priv_data_size = sizeof(FFV1Context),

  1784.     .init           = encode_init,

  1785.     .encode         = encode_frame,

  1786.     .close          = common_end,

  1787.     .capabilities = CODEC_CAP_SLICE_THREADS,

  1788.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_NONE},

  1789.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1790. };

  1791. #endif