falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35057 Commits
32 Branches
325MB
Tree: 9c6cf7f2c9
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '9c6cf7f2c9'
${ noResults }
FFmpeg/libavcodec/ffv1.c

1764 lines
56KB
Raw Blame History 

  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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. 

  184.     int quant_table_count;

  185. 

  186.     DSPContext dsp;

  187. 

  188.     struct FFV1Context *slice_context[MAX_SLICES];

  189.     int slice_count;

  190.     int num_v_slices;

  191.     int num_h_slices;

  192.     int slice_width;

  193.     int slice_height;

  194.     int slice_x;

  195.     int slice_y;

  196. }FFV1Context;

  197. 

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

  199.     if(bits==8)

  200.         diff= (int8_t)diff;

  201.     else{

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

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

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

  205.     }

  206. 

  207.     return diff;

  208. }

  209. 

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

  211. {

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

  213.     const int  T= last[ 0];

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

  215. 

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

  217. }

  218. 

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

  220.                               int16_t *last, int16_t *last2)

  221. {

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

  223.     const int  T= last[ 0];

  224.     const int RT= last[ 1];

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

  226. 

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

  228.         const int TT= last2[0];

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

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

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

  232.     }else

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

  234. }

  235. 

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

  237.     int i,j,k,m;

  238.     double l2tab[256];

  239. 

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

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

  242. 

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

  244.         double best_len[256];

  245.         double p= i/256.0;

  246. 

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

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

  249. 

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

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

  252.             double len=0;

  253.             occ[j]=1.0;

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

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

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

  257.                     if(occ[m]){

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

  259.                                       + (1-p)*l2tab[256-m]);

  260.                     }

  261.                 }

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

  263.                     best_len[k]= len;

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

  265.                 }

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

  267.                     if(occ[m]){

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

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

  270.                     }

  271.                 }

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

  273.             }

  274.         }

  275.     }

  276. }

  277. 

  278. 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]){

  279.     int i;

  280. 

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

  282. do{\

  283.     if(rc_stat){\

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

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

  286.     }\

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

  288. }while(0)

  289. 

  290.     if(v){

  291.         const int a= FFABS(v);

  292.         const int e= av_log2(a);

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

  294.         if(e<=9){

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

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

  297.             }

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

  299. 

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

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

  302.             }

  303. 

  304.             if(is_signed)

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

  306.         }else{

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

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

  309.             }

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

  311. 

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

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

  314.             }

  315. 

  316.             if(is_signed)

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

  318.         }

  319.     }else{

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

  321.     }

  322. #undef put_rac

  323. }

  324. 

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

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

  327. }

  328. 

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

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

  331.         return 0;

  332.     else{

  333.         int i, e, a;

  334.         e= 0;

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

  336.             e++;

  337.         }

  338. 

  339.         a= 1;

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

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

  342.         }

  343. 

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

  345.         return (a^e)-e;

  346.     }

  347. }

  348. 

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

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

  351. }

  352. 

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

  354.     int drift= state->drift;

  355.     int count= state->count;

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

  357.     drift += v;

  358. 

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

  360.         count >>= 1;

  361.         drift >>= 1;

  362.         state->error_sum >>= 1;

  363.     }

  364.     count++;

  365. 

  366.     if(drift <= -count){

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

  368. 

  369.         drift += count;

  370.         if(drift <= -count)

  371.             drift= -count + 1;

  372.     }else if(drift > 0){

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

  374. 

  375.         drift -= count;

  376.         if(drift > 0)

  377.             drift= 0;

  378.     }

  379. 

  380.     state->drift= drift;

  381.     state->count= count;

  382. }

  383. 

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

  385.     int i, k, code;

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

  387. 

  388.     i= state->count;

  389.     k=0;

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

  391.         k++;

  392.         i += i;

  393.     }

  394. 

  395.     assert(k<=8);

  396. 

  397. #if 0 // JPEG LS

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

  399.     else                                         code= v;

  400. #else

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

  402. #endif

  403. 

  404. //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);

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

  406. 

  407.     update_vlc_state(state, v);

  408. }

  409. 

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

  411.     int k, i, v, ret;

  412. 

  413.     i= state->count;

  414.     k=0;

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

  416.         k++;

  417.         i += i;

  418.     }

  419. 

  420.     assert(k<=8);

  421. 

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

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

  424. 

  425. #if 0 // JPEG LS

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

  427. #else

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

  429. #endif

  430. 

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

  432. 

  433.     update_vlc_state(state, v);

  434. 

  435.     return ret;

  436. }

  437. 

  438. #if CONFIG_FFV1_ENCODER

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

  440.                                         int16_t *sample[3],

  441.                                         int plane_index, int bits)

  442. {

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

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

  445.     int x;

  446.     int run_index= s->run_index;

  447.     int run_count=0;

  448.     int run_mode=0;

  449. 

  450.     if(s->ac){

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

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

  453.             return -1;

  454.         }

  455.     }else{

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

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

  458.             return -1;

  459.         }

  460.     }

  461. 

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

  463.         int diff, context;

  464. 

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

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

  467. 

  468.         if(context < 0){

  469.             context = -context;

  470.             diff= -diff;

  471.         }

  472. 

  473.         diff= fold(diff, bits);

  474. 

  475.         if(s->ac){

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

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

  478.             }else{

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

  480.             }

  481.         }else{

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

  483. 

  484.             if(run_mode){

  485. 

  486.                 if(diff){

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

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

  489.                         run_index++;

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

  491.                     }

  492. 

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

  494.                     if(run_index) run_index--;

  495.                     run_count=0;

  496.                     run_mode=0;

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

  498.                 }else{

  499.                     run_count++;

  500.                 }

  501.             }

  502. 

  503. //            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));

  504. 

  505.             if(run_mode == 0)

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

  507.         }

  508.     }

  509.     if(run_mode){

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

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

  512.             run_index++;

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

  514.         }

  515. 

  516.         if(run_count)

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

  518.     }

  519.     s->run_index= run_index;

  520. 

  521.     return 0;

  522. }

  523. 

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

  525.     int x,y,i;

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

  527.     int16_t *sample[3];

  528.     s->run_index=0;

  529. 

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

  531. 

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

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

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

  535. 

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

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

  538. //{START_TIMER

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

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

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

  542.             }

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

  544.         }else{

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

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

  547.             }

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

  549.         }

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

  551.     }

  552. }

  553. 

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

  555.     int x, y, p, i;

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

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

  558.     s->run_index=0;

  559. 

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

  561. 

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

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

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

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

  566. 

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

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

  569.             int b= v&0xFF;

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

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

  572. 

  573.             b -= g;

  574.             r -= g;

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

  576.             b += 0x100;

  577.             r += 0x100;

  578. 

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

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

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

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

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

  584.         }

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

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

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

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

  589.         }

  590.     }

  591. }

  592. 

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

  594.     int last=0;

  595.     int i;

  596.     uint8_t state[CONTEXT_SIZE];

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

  598. 

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

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

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

  602.             last= i;

  603.         }

  604.     }

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

  606. }

  607. 

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

  609.     int i;

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

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

  612. }

  613. 

  614. static void write_header(FFV1Context *f){

  615.     uint8_t state[CONTEXT_SIZE];

  616.     int i, j;

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

  618. 

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

  620. 

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

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

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

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

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

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

  627.             }

  628.         }

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

  630.         if(f->version>0)

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

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

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

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

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

  636. 

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

  638.     }else{

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

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

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

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

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

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

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

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

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

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

  649.             }

  650.         }

  651.     }

  652. }

  653. #endif /* CONFIG_FFV1_ENCODER */

  654. 

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

  656.     FFV1Context *s = avctx->priv_data;

  657. 

  658.     s->avctx= avctx;

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

  660. 

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

  662. 

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

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

  665. 

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

  667.     //defaults

  668.     s->num_h_slices=1;

  669.     s->num_v_slices=1;

  670. 

  671. 

  672.     return 0;

  673. }

  674. 

  675. static int init_slice_state(FFV1Context *f){

  676.     int i, j;

  677. 

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

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

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

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

  682. 

  683.             if(fs->ac){

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

  685.                 if(!p->    state)

  686.                     return AVERROR(ENOMEM);

  687.             }else{

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

  689.                 if(!p->vlc_state)

  690.                     return AVERROR(ENOMEM);

  691.             }

  692.         }

  693. 

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

  695.             //FIXME only redo if state_transition changed

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

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

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

  699.             }

  700.         }

  701.     }

  702. 

  703.     return 0;

  704. }

  705. 

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

  707.     int i;

  708. 

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

  710. 

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

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

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

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

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

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

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

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

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

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

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

  722. 

  723.         fs->slice_width = sxe - sxs;

  724.         fs->slice_height= sye - sys;

  725.         fs->slice_x     = sxs;

  726.         fs->slice_y     = sys;

  727. 

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

  729.         if (!fs->sample_buffer)

  730.             return AVERROR(ENOMEM);

  731.     }

  732.     return 0;

  733. }

  734. 

  735. static int allocate_initial_states(FFV1Context *f){

  736.     int i;

  737. 

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

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

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

  741.             return AVERROR(ENOMEM);

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

  743.     }

  744.     return 0;

  745. }

  746. 

  747. #if CONFIG_FFV1_ENCODER

  748. static int write_extra_header(FFV1Context *f){

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

  750.     uint8_t state[CONTEXT_SIZE];

  751.     int i, j, k;

  752.     uint8_t state2[32][CONTEXT_SIZE];

  753. 

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

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

  756. 

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

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

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

  760. 

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

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

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

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

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

  766.         }

  767.     }

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

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

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

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

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

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

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

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

  776. 

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

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

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

  780. 

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

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

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

  784.                 break;

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

  786.             put_rac(c, state, 1);

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

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

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

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

  791.                 }

  792.             }

  793.         }else{

  794.             put_rac(c, state, 0);

  795.         }

  796.     }

  797. 

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

  799. 

  800.     return 0;

  801. }

  802. 

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

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

  805. 

  806.     do{

  807.         changed=0;

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

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

  810. #define COST(old, new) \

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

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

  813. 

  814. #define COST2(old, new) \

  815.     COST(old, new)\

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

  817. 

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

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

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

  821.                     int j;

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

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

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

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

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

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

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

  829.                     }

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

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

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

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

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

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

  836.                         }

  837.                     }

  838.                     print=changed=1;

  839.                 }

  840.             }

  841.         }

  842.     }while(changed);

  843.     return print;

  844. }

  845. 

  846. static av_cold int encode_init(AVCodecContext *avctx)

  847. {

  848.     FFV1Context *s = avctx->priv_data;

  849.     int i, j, k, m;

  850. 

  851.     common_init(avctx);

  852. 

  853.     s->version=0;

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

  855. 

  856.     if(s->ac>1)

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

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

  859. 

  860.     s->plane_count=2;

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

  862.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  872.         }else{

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

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

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

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

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

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

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

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

  881.         }

  882.     }

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

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

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

  886. 

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

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

  889. 

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

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

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

  893.     }

  894. 

  895.     if(allocate_initial_states(s) < 0)

  896.         return AVERROR(ENOMEM);

  897. 

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

  899.     switch(avctx->pix_fmt){

  900.     case PIX_FMT_YUV444P16:

  901.     case PIX_FMT_YUV422P16:

  902.     case PIX_FMT_YUV420P16:

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

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

  905.             return -1;

  906.         }

  907.         if(!s->ac){

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

  909.             return -1;

  910.         }

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

  912.     case PIX_FMT_YUV444P:

  913.     case PIX_FMT_YUV422P:

  914.     case PIX_FMT_YUV420P:

  915.     case PIX_FMT_YUV411P:

  916.     case PIX_FMT_YUV410P:

  917.         s->colorspace= 0;

  918.         break;

  919.     case PIX_FMT_RGB32:

  920.         s->colorspace= 1;

  921.         break;

  922.     default:

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

  924.         return -1;

  925.     }

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

  927. 

  928.     s->picture_number=0;

  929. 

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

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

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

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

  934.                 return AVERROR(ENOMEM);

  935.         }

  936.     }

  937.     if(avctx->stats_in){

  938.         char *p= avctx->stats_in;

  939.         uint8_t best_state[256][256];

  940.         int gob_count=0;

  941.         char *next;

  942. 

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

  944. 

  945.         for(;;){

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

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

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

  949.                     if(next==p){

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

  951.                         return -1;

  952.                     }

  953.                     p=next;

  954.                 }

  955.             }

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

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

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

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

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

  961.                             if(next==p){

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

  963.                                 return -1;

  964.                             }

  965.                             p=next;

  966.                         }

  967.                     }

  968.                 }

  969.             }

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

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

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

  973.                 return -1;

  974.             }

  975.             p=next;

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

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

  978.         }

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

  980. 

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

  982. 

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

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

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

  986.                     double p= 128;

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

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

  989.                     }

  990.                     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)];

  991.                 }

  992.             }

  993.         }

  994.     }

  995. 

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

  997.         s->num_h_slices=2;

  998.         s->num_v_slices=2;

  999.         write_extra_header(s);

  1000.     }

  1001. 

  1002.     if(init_slice_contexts(s) < 0)

  1003.         return -1;

  1004.     if(init_slice_state(s) < 0)

  1005.         return -1;

  1006. 

  1007. #define STATS_OUT_SIZE 1024*1024*6

  1008.     if(avctx->flags & CODEC_FLAG_PASS1){

  1009.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1010.         for(i=0; i<s->quant_table_count; i++){

  1011.             for(j=0; j<s->slice_count; j++){

  1012.                 FFV1Context *sf= s->slice_context[j];

  1013.                 av_assert0(!sf->rc_stat2[i]);

  1014.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1015.                 if(!sf->rc_stat2[i])

  1016.                     return AVERROR(ENOMEM);

  1017.             }

  1018.         }

  1019.     }

  1020. 

  1021.     return 0;

  1022. }

  1023. #endif /* CONFIG_FFV1_ENCODER */

  1024. 

  1025. 

  1026. static void clear_state(FFV1Context *f){

  1027.     int i, si, j;

  1028. 

  1029.     for(si=0; si<f->slice_count; si++){

  1030.         FFV1Context *fs= f->slice_context[si];

  1031.         for(i=0; i<f->plane_count; i++){

  1032.             PlaneContext *p= &fs->plane[i];

  1033. 

  1034.             p->interlace_bit_state[0]= 128;

  1035.             p->interlace_bit_state[1]= 128;

  1036. 

  1037.             if(fs->ac){

  1038.                 if(f->initial_states[p->quant_table_index]){

  1039.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1040.                 }else

  1041.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1042.             }else{

  1043.             for(j=0; j<p->context_count; j++){

  1044.                     p->vlc_state[j].drift= 0;

  1045.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1046.                     p->vlc_state[j].bias= 0;

  1047.                     p->vlc_state[j].count= 1;

  1048.             }

  1049.             }

  1050.         }

  1051.     }

  1052. }

  1053. 

  1054. #if CONFIG_FFV1_ENCODER

  1055. static int encode_slice(AVCodecContext *c, void *arg){

  1056.     FFV1Context *fs= *(void**)arg;

  1057.     FFV1Context *f= fs->avctx->priv_data;

  1058.     int width = fs->slice_width;

  1059.     int height= fs->slice_height;

  1060.     int x= fs->slice_x;

  1061.     int y= fs->slice_y;

  1062.     AVFrame * const p= &f->picture;

  1063. 

  1064.     if(f->colorspace==0){

  1065.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1066.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1067.         const int cx= x>>f->chroma_h_shift;

  1068.         const int cy= y>>f->chroma_v_shift;

  1069. 

  1070.         encode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1071. 

  1072.         encode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1073.         encode_plane(fs, p->data[2] + cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1074.     }else{

  1075.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1076.     }

  1077.     emms_c();

  1078. 

  1079.     return 0;

  1080. }

  1081. 

  1082. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1083.                         const AVFrame *pict, int *got_packet)

  1084. {

  1085.     FFV1Context *f = avctx->priv_data;

  1086.     RangeCoder * const c= &f->slice_context[0]->c;

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

  1088.     int used_count= 0;

  1089.     uint8_t keystate=128;

  1090.     uint8_t *buf_p;

  1091.     int i, ret;

  1092. 

  1093.     if (!pkt->data &&

  1094.         (ret = av_new_packet(pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1095.                                   + FF_MIN_BUFFER_SIZE)) < 0) {

  1096.         av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");

  1097.         return ret;

  1098.     }

  1099. 

  1100.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1101.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1102. 

  1103.     *p = *pict;

  1104.     p->pict_type= AV_PICTURE_TYPE_I;

  1105. 

  1106.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1107.         put_rac(c, &keystate, 1);

  1108.         p->key_frame= 1;

  1109.         f->gob_count++;

  1110.         write_header(f);

  1111.         clear_state(f);

  1112.     }else{

  1113.         put_rac(c, &keystate, 0);

  1114.         p->key_frame= 0;

  1115.     }

  1116. 

  1117.     if(!f->ac){

  1118.         used_count += ff_rac_terminate(c);

  1119.         init_put_bits(&f->slice_context[0]->pb, pkt->data + used_count, pkt->size - used_count);

  1120.     }else if (f->ac>1){

  1121.         int i;

  1122.         for(i=1; i<256; i++){

  1123.             c->one_state[i]= f->state_transition[i];

  1124.             c->zero_state[256-i]= 256-c->one_state[i];

  1125.         }

  1126.     }

  1127. 

  1128.     for(i=1; i<f->slice_count; i++){

  1129.         FFV1Context *fs= f->slice_context[i];

  1130.         uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;

  1131.         int len = pkt->size/f->slice_count;

  1132. 

  1133.         if(fs->ac){

  1134.             ff_init_range_encoder(&fs->c, start, len);

  1135.         }else{

  1136.             init_put_bits(&fs->pb, start, len);

  1137.         }

  1138.     }

  1139.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1140. 

  1141.     buf_p = pkt->data;

  1142.     for(i=0; i<f->slice_count; i++){

  1143.         FFV1Context *fs= f->slice_context[i];

  1144.         int bytes;

  1145. 

  1146.         if(fs->ac){

  1147.             uint8_t state=128;

  1148.             put_rac(&fs->c, &state, 0);

  1149.             bytes= ff_rac_terminate(&fs->c);

  1150.         }else{

  1151.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1152.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1153.             used_count= 0;

  1154.         }

  1155.         if(i>0){

  1156.             av_assert0(bytes < pkt->size/f->slice_count);

  1157.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1158.             av_assert0(bytes < (1<<24));

  1159.             AV_WB24(buf_p+bytes, bytes);

  1160.             bytes+=3;

  1161.         }

  1162.         buf_p += bytes;

  1163.     }

  1164. 

  1165.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1166.         int j, k, m;

  1167.         char *p= avctx->stats_out;

  1168.         char *end= p + STATS_OUT_SIZE;

  1169. 

  1170.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1171.         for(i=0; i<f->quant_table_count; i++)

  1172.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1173. 

  1174.         for(j=0; j<f->slice_count; j++){

  1175.             FFV1Context *fs= f->slice_context[j];

  1176.             for(i=0; i<256; i++){

  1177.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1178.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1179.             }

  1180.             for(i=0; i<f->quant_table_count; i++){

  1181.                 for(k=0; k<f->context_count[i]; k++){

  1182.                     for(m=0; m<32; m++){

  1183.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1184.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1185.                     }

  1186.                 }

  1187.             }

  1188.         }

  1189. 

  1190.         for(j=0; j<256; j++){

  1191.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1192.             p+= strlen(p);

  1193.         }

  1194.         snprintf(p, end-p, "\n");

  1195. 

  1196.         for(i=0; i<f->quant_table_count; i++){

  1197.             for(j=0; j<f->context_count[i]; j++){

  1198.                 for(m=0; m<32; m++){

  1199.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1200.                     p+= strlen(p);

  1201.                 }

  1202.             }

  1203.         }

  1204.         snprintf(p, end-p, "%d\n", f->gob_count);

  1205.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1206.         avctx->stats_out[0] = '\0';

  1207. 

  1208.     f->picture_number++;

  1209.     pkt->size   = buf_p - pkt->data;

  1210.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1211.     *got_packet = 1;

  1212. 

  1213.     return 0;

  1214. }

  1215. #endif /* CONFIG_FFV1_ENCODER */

  1216. 

  1217. static av_cold int common_end(AVCodecContext *avctx){

  1218.     FFV1Context *s = avctx->priv_data;

  1219.     int i, j;

  1220. 

  1221.     if (avctx->codec->decode && s->picture.data[0])

  1222.         avctx->release_buffer(avctx, &s->picture);

  1223. 

  1224.     for(j=0; j<s->slice_count; j++){

  1225.         FFV1Context *fs= s->slice_context[j];

  1226.         for(i=0; i<s->plane_count; i++){

  1227.             PlaneContext *p= &fs->plane[i];

  1228. 

  1229.             av_freep(&p->state);

  1230.             av_freep(&p->vlc_state);

  1231.         }

  1232.         av_freep(&fs->sample_buffer);

  1233.     }

  1234. 

  1235.     av_freep(&avctx->stats_out);

  1236.     for(j=0; j<s->quant_table_count; j++){

  1237.         av_freep(&s->initial_states[j]);

  1238.         for(i=0; i<s->slice_count; i++){

  1239.             FFV1Context *sf= s->slice_context[i];

  1240.             av_freep(&sf->rc_stat2[j]);

  1241.         }

  1242.         av_freep(&s->rc_stat2[j]);

  1243.     }

  1244. 

  1245.     for(i=0; i<s->slice_count; i++){

  1246.         av_freep(&s->slice_context[i]);

  1247.     }

  1248. 

  1249.     return 0;

  1250. }

  1251. 

  1252. static av_always_inline void decode_line(FFV1Context *s, int w,

  1253.                                          int16_t *sample[2],

  1254.                                          int plane_index, int bits)

  1255. {

  1256.     PlaneContext * const p= &s->plane[plane_index];

  1257.     RangeCoder * const c= &s->c;

  1258.     int x;

  1259.     int run_count=0;

  1260.     int run_mode=0;

  1261.     int run_index= s->run_index;

  1262. 

  1263.     for(x=0; x<w; x++){

  1264.         int diff, context, sign;

  1265. 

  1266.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1267.         if(context < 0){

  1268.             context= -context;

  1269.             sign=1;

  1270.         }else

  1271.             sign=0;

  1272. 

  1273.         av_assert2(context < p->context_count);

  1274. 

  1275.         if(s->ac){

  1276.             diff= get_symbol_inline(c, p->state[context], 1);

  1277.         }else{

  1278.             if(context == 0 && run_mode==0) run_mode=1;

  1279. 

  1280.             if(run_mode){

  1281.                 if(run_count==0 && run_mode==1){

  1282.                     if(get_bits1(&s->gb)){

  1283.                         run_count = 1<<ff_log2_run[run_index];

  1284.                         if(x + run_count <= w) run_index++;

  1285.                     }else{

  1286.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1287.                         else run_count=0;

  1288.                         if(run_index) run_index--;

  1289.                         run_mode=2;

  1290.                     }

  1291.                 }

  1292.                 run_count--;

  1293.                 if(run_count < 0){

  1294.                     run_mode=0;

  1295.                     run_count=0;

  1296.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1297.                     if(diff>=0) diff++;

  1298.                 }else

  1299.                     diff=0;

  1300.             }else

  1301.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1302. 

  1303. //            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));

  1304.         }

  1305. 

  1306.         if(sign) diff= -diff;

  1307. 

  1308.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1309.     }

  1310.     s->run_index= run_index;

  1311. }

  1312. 

  1313. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1314.     int x, y;

  1315.     int16_t *sample[2];

  1316.     sample[0]=s->sample_buffer    +3;

  1317.     sample[1]=s->sample_buffer+w+6+3;

  1318. 

  1319.     s->run_index=0;

  1320. 

  1321.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1322. 

  1323.     for(y=0; y<h; y++){

  1324.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1325. 

  1326.         sample[0]= sample[1];

  1327.         sample[1]= temp;

  1328. 

  1329.         sample[1][-1]= sample[0][0  ];

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

  1331. 

  1332. //{START_TIMER

  1333.         if(s->avctx->bits_per_raw_sample <= 8){

  1334.             decode_line(s, w, sample, plane_index, 8);

  1335.             for(x=0; x<w; x++){

  1336.                 src[x + stride*y]= sample[1][x];

  1337.             }

  1338.         }else{

  1339.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1340.             for(x=0; x<w; x++){

  1341.                 ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1342.             }

  1343.         }

  1344. //STOP_TIMER("decode-line")}

  1345.     }

  1346. }

  1347. 

  1348. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1349.     int x, y, p;

  1350.     int16_t *sample[3][2];

  1351.     for(x=0; x<3; x++){

  1352.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1353.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1354.     }

  1355. 

  1356.     s->run_index=0;

  1357. 

  1358.     memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));

  1359. 

  1360.     for(y=0; y<h; y++){

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

  1362.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1363. 

  1364.             sample[p][0]= sample[p][1];

  1365.             sample[p][1]= temp;

  1366. 

  1367.             sample[p][1][-1]= sample[p][0][0  ];

  1368.             sample[p][0][ w]= sample[p][0][w-1];

  1369.             decode_line(s, w, sample[p], FFMIN(p, 1), 9);

  1370.         }

  1371.         for(x=0; x<w; x++){

  1372.             int g= sample[0][1][x];

  1373.             int b= sample[1][1][x];

  1374.             int r= sample[2][1][x];

  1375. 

  1376. //            assert(g>=0 && b>=0 && r>=0);

  1377. //            assert(g<256 && b<512 && r<512);

  1378. 

  1379.             b -= 0x100;

  1380.             r -= 0x100;

  1381.             g -= (b + r)>>2;

  1382.             b += g;

  1383.             r += g;

  1384. 

  1385.             src[x + stride*y]= b + (g<<8) + (r<<16) + (0xFF<<24);

  1386.         }

  1387.     }

  1388. }

  1389. 

  1390. static int decode_slice(AVCodecContext *c, void *arg){

  1391.     FFV1Context *fs= *(void**)arg;

  1392.     FFV1Context *f= fs->avctx->priv_data;

  1393.     int width = fs->slice_width;

  1394.     int height= fs->slice_height;

  1395.     int x= fs->slice_x;

  1396.     int y= fs->slice_y;

  1397.     AVFrame * const p= &f->picture;

  1398. 

  1399.     av_assert1(width && height);

  1400.     if(f->colorspace==0){

  1401.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1402.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1403.         const int cx= x>>f->chroma_h_shift;

  1404.         const int cy= y>>f->chroma_v_shift;

  1405.         decode_plane(fs, p->data[0] + x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1406. 

  1407.         decode_plane(fs, p->data[1] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1408.         decode_plane(fs, p->data[2] + cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[2], 1);

  1409.     }else{

  1410.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1411.     }

  1412. 

  1413.     emms_c();

  1414. 

  1415.     return 0;

  1416. }

  1417. 

  1418. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1419.     int v;

  1420.     int i=0;

  1421.     uint8_t state[CONTEXT_SIZE];

  1422. 

  1423.     memset(state, 128, sizeof(state));

  1424. 

  1425.     for(v=0; i<128 ; v++){

  1426.         int len= get_symbol(c, state, 0) + 1;

  1427. 

  1428.         if(len + i > 128) return -1;

  1429. 

  1430.         while(len--){

  1431.             quant_table[i] = scale*v;

  1432.             i++;

  1433.         }

  1434.     }

  1435. 

  1436.     for(i=1; i<128; i++){

  1437.         quant_table[256-i]= -quant_table[i];

  1438.     }

  1439.     quant_table[128]= -quant_table[127];

  1440. 

  1441.     return 2*v - 1;

  1442. }

  1443. 

  1444. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1445.     int i;

  1446.     int context_count=1;

  1447. 

  1448.     for(i=0; i<5; i++){

  1449.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1450.         if(context_count > 32768U){

  1451.             return -1;

  1452.         }

  1453.     }

  1454.     return (context_count+1)/2;

  1455. }

  1456. 

  1457. static int read_extra_header(FFV1Context *f){

  1458.     RangeCoder * const c= &f->c;

  1459.     uint8_t state[CONTEXT_SIZE];

  1460.     int i, j, k;

  1461.     uint8_t state2[32][CONTEXT_SIZE];

  1462. 

  1463.     memset(state2, 128, sizeof(state2));

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

  1465. 

  1466.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1467.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1468. 

  1469.     f->version= get_symbol(c, state, 0);

  1470.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1471.     if(f->ac>1){

  1472.         for(i=1; i<256; i++){

  1473.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1474.         }

  1475.     }

  1476.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1477.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1478.     get_rac(c, state); //no chroma = false

  1479.     f->chroma_h_shift= get_symbol(c, state, 0);

  1480.     f->chroma_v_shift= get_symbol(c, state, 0);

  1481.     get_rac(c, state); //transparency plane

  1482.     f->plane_count= 2;

  1483.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1484.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1485.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1486.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1487.         return -1;

  1488.     }

  1489. 

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

  1491.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1492.         return -1;

  1493.     for(i=0; i<f->quant_table_count; i++){

  1494.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1495.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1496.             return -1;

  1497.         }

  1498.     }

  1499. 

  1500.     if(allocate_initial_states(f) < 0)

  1501.         return AVERROR(ENOMEM);

  1502. 

  1503.     for(i=0; i<f->quant_table_count; i++){

  1504.         if(get_rac(c, state)){

  1505.             for(j=0; j<f->context_count[i]; j++){

  1506.                 for(k=0; k<CONTEXT_SIZE; k++){

  1507.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1508.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1509.                 }

  1510.             }

  1511.         }

  1512.     }

  1513. 

  1514.     return 0;

  1515. }

  1516. 

  1517. static int read_header(FFV1Context *f){

  1518.     uint8_t state[CONTEXT_SIZE];

  1519.     int i, j, context_count;

  1520.     RangeCoder * const c= &f->slice_context[0]->c;

  1521. 

  1522.     memset(state, 128, sizeof(state));

  1523. 

  1524.     if(f->version < 2){

  1525.         f->version= get_symbol(c, state, 0);

  1526.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1527.         if(f->ac>1){

  1528.             for(i=1; i<256; i++){

  1529.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1530.             }

  1531.         }

  1532.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1533.         if(f->version>0)

  1534.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1535.         get_rac(c, state); //no chroma = false

  1536.         f->chroma_h_shift= get_symbol(c, state, 0);

  1537.         f->chroma_v_shift= get_symbol(c, state, 0);

  1538.         get_rac(c, state); //transparency plane

  1539.         f->plane_count= 2;

  1540.     }

  1541. 

  1542.     if(f->colorspace==0){

  1543.         if(f->avctx->bits_per_raw_sample<=8){

  1544.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1545.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1546.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1547.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1548.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1549.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1550.             default:

  1551.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1552.                 return -1;

  1553.             }

  1554.         }else{

  1555.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1556.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1557.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1558.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1559.             default:

  1560.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1561.                 return -1;

  1562.             }

  1563.         }

  1564.     }else if(f->colorspace==1){

  1565.         if(f->chroma_h_shift || f->chroma_v_shift){

  1566.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1567.             return -1;

  1568.         }

  1569.         f->avctx->pix_fmt= PIX_FMT_RGB32;

  1570.     }else{

  1571.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1572.         return -1;

  1573.     }

  1574. 

  1575. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1576.     if(f->version < 2){

  1577.         context_count= read_quant_tables(c, f->quant_table);

  1578.         if(context_count < 0){

  1579.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1580.                 return -1;

  1581.         }

  1582.     }else{

  1583.         f->slice_count= get_symbol(c, state, 0);

  1584.         if(f->slice_count > (unsigned)MAX_SLICES)

  1585.             return -1;

  1586.     }

  1587. 

  1588.     for(j=0; j<f->slice_count; j++){

  1589.         FFV1Context *fs= f->slice_context[j];

  1590.         fs->ac= f->ac;

  1591. 

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

  1593.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1594.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1595.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1596.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1597. 

  1598.             fs->slice_x /= f->num_h_slices;

  1599.             fs->slice_y /= f->num_v_slices;

  1600.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1601.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1602.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1603.                 return -1;

  1604.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1605.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1606.                 return -1;

  1607.         }

  1608. 

  1609.         for(i=0; i<f->plane_count; i++){

  1610.             PlaneContext * const p= &fs->plane[i];

  1611. 

  1612.             if(f->version >= 2){

  1613.                 int idx=get_symbol(c, state, 0);

  1614.                 if(idx > (unsigned)f->quant_table_count){

  1615.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1616.                     return -1;

  1617.                 }

  1618.                 p->quant_table_index= idx;

  1619.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1620.                 context_count= f->context_count[idx];

  1621.             }else{

  1622.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1623.             }

  1624. 

  1625.             if(p->context_count < context_count){

  1626.                 av_freep(&p->state);

  1627.                 av_freep(&p->vlc_state);

  1628.             }

  1629.             p->context_count= context_count;

  1630.         }

  1631.     }

  1632. 

  1633.     return 0;

  1634. }

  1635. 

  1636. static av_cold int decode_init(AVCodecContext *avctx)

  1637. {

  1638.     FFV1Context *f = avctx->priv_data;

  1639. 

  1640.     common_init(avctx);

  1641. 

  1642.     if(avctx->extradata && read_extra_header(f) < 0)

  1643.         return -1;

  1644. 

  1645.     if(init_slice_contexts(f) < 0)

  1646.         return -1;

  1647. 

  1648.     return 0;

  1649. }

  1650. 

  1651. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1652.     const uint8_t *buf = avpkt->data;

  1653.     int buf_size = avpkt->size;

  1654.     FFV1Context *f = avctx->priv_data;

  1655.     RangeCoder * const c= &f->slice_context[0]->c;

  1656.     AVFrame * const p= &f->picture;

  1657.     int bytes_read, i;

  1658.     uint8_t keystate= 128;

  1659.     const uint8_t *buf_p;

  1660. 

  1661.     AVFrame *picture = data;

  1662. 

  1663.     /* release previously stored data */

  1664.     if (p->data[0])

  1665.         avctx->release_buffer(avctx, p);

  1666. 

  1667.     ff_init_range_decoder(c, buf, buf_size);

  1668.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1669. 

  1670. 

  1671.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1672.     if(get_rac(c, &keystate)){

  1673.         p->key_frame= 1;

  1674.         if(read_header(f) < 0)

  1675.             return -1;

  1676.         if(init_slice_state(f) < 0)

  1677.             return -1;

  1678. 

  1679.         clear_state(f);

  1680.     }else{

  1681.         p->key_frame= 0;

  1682.     }

  1683.     if(f->ac>1){

  1684.         int i;

  1685.         for(i=1; i<256; i++){

  1686.             c->one_state[i]= f->state_transition[i];

  1687.             c->zero_state[256-i]= 256-c->one_state[i];

  1688.         }

  1689.     }

  1690. 

  1691.     p->reference= 0;

  1692.     if(avctx->get_buffer(avctx, p) < 0){

  1693.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1694.         return -1;

  1695.     }

  1696. 

  1697.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1698.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1699. 

  1700.     if(!f->ac){

  1701.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1702.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1703.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1704.     } else {

  1705.         bytes_read = 0; /* avoid warning */

  1706.     }

  1707. 

  1708.     buf_p= buf + buf_size;

  1709.     for(i=f->slice_count-1; i>0; i--){

  1710.         FFV1Context *fs= f->slice_context[i];

  1711.         int v= AV_RB24(buf_p-3)+3;

  1712.         if(buf_p - buf <= v){

  1713.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1714.             return -1;

  1715.         }

  1716.         buf_p -= v;

  1717.         if(fs->ac){

  1718.             ff_init_range_decoder(&fs->c, buf_p, v);

  1719.         }else{

  1720.             init_get_bits(&fs->gb, buf_p, v * 8);

  1721.         }

  1722.     }

  1723. 

  1724.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1725.     f->picture_number++;

  1726. 

  1727.     *picture= *p;

  1728.     *data_size = sizeof(AVFrame);

  1729. 

  1730.     return buf_size;

  1731. }

  1732. 

  1733. AVCodec ff_ffv1_decoder = {

  1734.     .name           = "ffv1",

  1735.     .type           = AVMEDIA_TYPE_VIDEO,

  1736.     .id             = AV_CODEC_ID_FFV1,

  1737.     .priv_data_size = sizeof(FFV1Context),

  1738.     .init           = decode_init,

  1739.     .close          = common_end,

  1740.     .decode         = decode_frame,

  1741.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |

  1742.                       CODEC_CAP_SLICE_THREADS,

  1743.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1744. };

  1745. 

  1746. #if CONFIG_FFV1_ENCODER

  1747. AVCodec ff_ffv1_encoder = {

  1748.     .name           = "ffv1",

  1749.     .type           = AVMEDIA_TYPE_VIDEO,

  1750.     .id             = AV_CODEC_ID_FFV1,

  1751.     .priv_data_size = sizeof(FFV1Context),

  1752.     .init           = encode_init,

  1753.     .encode2        = encode_frame,

  1754.     .close          = common_end,

  1755.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1756.     .pix_fmts       = (const enum PixelFormat[]){

  1757.         PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P,

  1758.         PIX_FMT_YUV410P, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16,

  1759.         PIX_FMT_YUV444P16, PIX_FMT_NONE

  1760.     },

  1761.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1762. };

  1763. #endif