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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

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

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "internal.h"

  30. #include "get_bits.h"

  31. #include "put_bits.h"

  32. #include "dsputil.h"

  33. #include "rangecoder.h"

  34. #include "golomb.h"

  35. #include "mathops.h"

  36. #include "libavutil/pixdesc.h"

  37. #include "libavutil/avassert.h"

  38. 

  39. #define MAX_PLANES 4

  40. #define CONTEXT_SIZE 32

  41. 

  42. #define MAX_QUANT_TABLES 8

  43. #define MAX_CONTEXT_INPUTS 5

  44. 

  45. extern const uint8_t ff_log2_run[41];

  46. 

  47. static const int8_t quant5_10bit[256]={

  48.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

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

  50.  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  51.  1, 1, 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,-2,

  59. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  60. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

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

  62. -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  63. -1,-1,-1,-1,-1,-1,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  64. };

  65. 

  66. static const int8_t quant5[256]={

  67.  0, 1, 1, 1, 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,-2,-2,-2,

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

  82. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,

  83. };

  84. 

  85. static const int8_t quant9_10bit[256]={

  86.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  87.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,

  88.  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,

  89.  3, 3, 3, 3, 3, 3, 3, 3, 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,-4,-4,-4,-4,-4,-4,-4,

  97. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  98. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,

  99. -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,

  100. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  101. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  102. };

  103. 

  104. static const int8_t quant11[256]={

  105.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

  106.  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,

  107.  4, 4, 4, 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,-5,-5,

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

  118. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,

  119. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  120. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  121. };

  122. 

  123. static const uint8_t ver2_state[256]= {

  124.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  125.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  126.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  127.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  128.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  129.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  130.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

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

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

  133.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  134.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  135.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  136.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  137.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  138.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  139.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  140. };

  141. 

  142. typedef struct VlcState{

  143.     int16_t drift;

  144.     uint16_t error_sum;

  145.     int8_t bias;

  146.     uint8_t count;

  147. } VlcState;

  148. 

  149. typedef struct PlaneContext{

  150.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  151.     int quant_table_index;

  152.     int context_count;

  153.     uint8_t (*state)[CONTEXT_SIZE];

  154.     VlcState *vlc_state;

  155.     uint8_t interlace_bit_state[2];

  156. } PlaneContext;

  157. 

  158. #define MAX_SLICES 256

  159. 

  160. typedef struct FFV1Context{

  161.     AVCodecContext *avctx;

  162.     RangeCoder c;

  163.     GetBitContext gb;

  164.     PutBitContext pb;

  165.     uint64_t rc_stat[256][2];

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

  167.     int version;

  168.     int width, height;

  169.     int chroma_h_shift, chroma_v_shift;

  170.     int chroma_planes;

  171.     int transparency;

  172.     int flags;

  173.     int picture_number;

  174.     AVFrame picture;

  175.     int plane_count;

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

  177.     PlaneContext plane[MAX_PLANES];

  178.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  180.     int context_count[MAX_QUANT_TABLES];

  181.     uint8_t state_transition[256];

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

  183.     int run_index;

  184.     int colorspace;

  185.     int16_t *sample_buffer;

  186.     int gob_count;

  187.     int packed_at_lsb;

  188. 

  189.     int quant_table_count;

  190. 

  191.     DSPContext dsp;

  192. 

  193.     struct FFV1Context *slice_context[MAX_SLICES];

  194.     int slice_count;

  195.     int num_v_slices;

  196.     int num_h_slices;

  197.     int slice_width;

  198.     int slice_height;

  199.     int slice_x;

  200.     int slice_y;

  201.     int bits_per_raw_sample;

  202. }FFV1Context;

  203. 

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

  205.     if(bits==8)

  206.         diff= (int8_t)diff;

  207.     else{

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

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

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

  211.     }

  212. 

  213.     return diff;

  214. }

  215. 

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

  217. {

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

  219.     const int  T= last[ 0];

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

  221. 

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

  223. }

  224. 

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

  226.                               int16_t *last, int16_t *last2)

  227. {

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

  229.     const int  T= last[ 0];

  230.     const int RT= last[ 1];

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

  232. 

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

  234.         const int TT= last2[0];

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

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

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

  238.     }else

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

  240. }

  241. 

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

  243.     int i,j,k,m;

  244.     double l2tab[256];

  245. 

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

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

  248. 

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

  250.         double best_len[256];

  251.         double p= i/256.0;

  252. 

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

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

  255. 

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

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

  258.             double len=0;

  259.             occ[j]=1.0;

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

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

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

  263.                     if(occ[m]){

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

  265.                                       + (1-p)*l2tab[256-m]);

  266.                     }

  267.                 }

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

  269.                     best_len[k]= len;

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

  271.                 }

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

  273.                     if(occ[m]){

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

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

  276.                     }

  277.                 }

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

  279.             }

  280.         }

  281.     }

  282. }

  283. 

  284. 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]){

  285.     int i;

  286. 

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

  288. do{\

  289.     if(rc_stat){\

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

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

  292.     }\

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

  294. }while(0)

  295. 

  296.     if(v){

  297.         const int a= FFABS(v);

  298.         const int e= av_log2(a);

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

  300.         if(e<=9){

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

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

  303.             }

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

  305. 

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

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

  308.             }

  309. 

  310.             if(is_signed)

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

  312.         }else{

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

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

  315.             }

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

  317. 

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

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

  320.             }

  321. 

  322.             if(is_signed)

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

  324.         }

  325.     }else{

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

  327.     }

  328. #undef put_rac

  329. }

  330. 

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

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

  333. }

  334. 

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

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

  337.         return 0;

  338.     else{

  339.         int i, e, a;

  340.         e= 0;

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

  342.             e++;

  343.         }

  344. 

  345.         a= 1;

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

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

  348.         }

  349. 

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

  351.         return (a^e)-e;

  352.     }

  353. }

  354. 

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

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

  357. }

  358. 

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

  360.     int drift= state->drift;

  361.     int count= state->count;

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

  363.     drift += v;

  364. 

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

  366.         count >>= 1;

  367.         drift >>= 1;

  368.         state->error_sum >>= 1;

  369.     }

  370.     count++;

  371. 

  372.     if(drift <= -count){

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

  374. 

  375.         drift += count;

  376.         if(drift <= -count)

  377.             drift= -count + 1;

  378.     }else if(drift > 0){

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

  380. 

  381.         drift -= count;

  382.         if(drift > 0)

  383.             drift= 0;

  384.     }

  385. 

  386.     state->drift= drift;

  387.     state->count= count;

  388. }

  389. 

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

  391.     int i, k, code;

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

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

  394. 

  395.     i= state->count;

  396.     k=0;

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

  398.         k++;

  399.         i += i;

  400.     }

  401. 

  402.     assert(k<=8);

  403. 

  404. #if 0 // JPEG LS

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

  406.     else                                         code= v;

  407. #else

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

  409. #endif

  410. 

  411. //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);

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

  413. 

  414.     update_vlc_state(state, v);

  415. }

  416. 

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

  418.     int k, i, v, ret;

  419. 

  420.     i= state->count;

  421.     k=0;

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

  423.         k++;

  424.         i += i;

  425.     }

  426. 

  427.     assert(k<=8);

  428. 

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

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

  431. 

  432. #if 0 // JPEG LS

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

  434. #else

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

  436. #endif

  437. 

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

  439. 

  440.     update_vlc_state(state, v);

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

  442.     return ret;

  443. }

  444. 

  445. #if CONFIG_FFV1_ENCODER

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

  447.                                         int16_t *sample[2],

  448.                                         int plane_index, int bits)

  449. {

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

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

  452.     int x;

  453.     int run_index= s->run_index;

  454.     int run_count=0;

  455.     int run_mode=0;

  456. 

  457.     if(s->ac){

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

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

  460.             return -1;

  461.         }

  462.     }else{

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

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

  465.             return -1;

  466.         }

  467.     }

  468. 

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

  470.         int diff, context;

  471. 

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

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

  474. 

  475.         if(context < 0){

  476.             context = -context;

  477.             diff= -diff;

  478.         }

  479. 

  480.         diff= fold(diff, bits);

  481. 

  482.         if(s->ac){

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

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

  485.             }else{

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

  487.             }

  488.         }else{

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

  490. 

  491.             if(run_mode){

  492. 

  493.                 if(diff){

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

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

  496.                         run_index++;

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

  498.                     }

  499. 

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

  501.                     if(run_index) run_index--;

  502.                     run_count=0;

  503.                     run_mode=0;

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

  505.                 }else{

  506.                     run_count++;

  507.                 }

  508.             }

  509. 

  510. //            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));

  511. 

  512.             if(run_mode == 0)

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

  514.         }

  515.     }

  516.     if(run_mode){

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

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

  519.             run_index++;

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

  521.         }

  522. 

  523.         if(run_count)

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

  525.     }

  526.     s->run_index= run_index;

  527. 

  528.     return 0;

  529. }

  530. 

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

  532.     int x,y,i;

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

  534.     int16_t *sample[3];

  535.     s->run_index=0;

  536. 

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

  538. 

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

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

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

  542. 

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

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

  545. //{START_TIMER

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

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

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

  549.             }

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

  551.         }else{

  552.             if(s->packed_at_lsb){

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

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

  555.                 }

  556.             }else{

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

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

  559.                 }

  560.             }

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

  562.         }

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

  564.     }

  565. }

  566. 

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

  568.     int x, y, p, i;

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

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

  571.     s->run_index=0;

  572. 

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

  574. 

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

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

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

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

  579. 

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

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

  582.             int b= v&0xFF;

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

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

  585.             int a=  v>>24;

  586. 

  587.             b -= g;

  588.             r -= g;

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

  590.             b += 0x100;

  591.             r += 0x100;

  592. 

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

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

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

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

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

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

  599.         }

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

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

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

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

  604.         }

  605.     }

  606. }

  607. 

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

  609.     int last=0;

  610.     int i;

  611.     uint8_t state[CONTEXT_SIZE];

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

  613. 

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

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

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

  617.             last= i;

  618.         }

  619.     }

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

  621. }

  622. 

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

  624.     int i;

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

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

  627. }

  628. 

  629. static void write_header(FFV1Context *f){

  630.     uint8_t state[CONTEXT_SIZE];

  631.     int i, j;

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

  633. 

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

  635. 

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

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

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

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

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

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

  642.             }

  643.         }

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

  645.         if(f->version>0)

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

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

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

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

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

  651. 

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

  653.     }else{

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

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

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

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

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

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

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

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

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

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

  664.             }

  665.         }

  666.     }

  667. }

  668. #endif /* CONFIG_FFV1_ENCODER */

  669. 

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

  671.     FFV1Context *s = avctx->priv_data;

  672. 

  673.     s->avctx= avctx;

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

  675. 

  676.     avcodec_get_frame_defaults(&s->picture);

  677. 

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

  679. 

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

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

  682. 

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

  684.     //defaults

  685.     s->num_h_slices=1;

  686.     s->num_v_slices=1;

  687. 

  688. 

  689.     return 0;

  690. }

  691. 

  692. static int init_slice_state(FFV1Context *f){

  693.     int i, j;

  694. 

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

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

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

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

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

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

  701. 

  702.             if(fs->ac){

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

  704.                 if(!p->    state)

  705.                     return AVERROR(ENOMEM);

  706.             }else{

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

  708.                 if(!p->vlc_state)

  709.                     return AVERROR(ENOMEM);

  710.             }

  711.         }

  712. 

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

  714.             //FIXME only redo if state_transition changed

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

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

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

  718.             }

  719.         }

  720.     }

  721. 

  722.     return 0;

  723. }

  724. 

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

  726.     int i;

  727. 

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

  729. 

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

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

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

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

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

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

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

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

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

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

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

  741. 

  742.         fs->slice_width = sxe - sxs;

  743.         fs->slice_height= sye - sys;

  744.         fs->slice_x     = sxs;

  745.         fs->slice_y     = sys;

  746. 

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

  748.         if (!fs->sample_buffer)

  749.             return AVERROR(ENOMEM);

  750.     }

  751.     return 0;

  752. }

  753. 

  754. static int allocate_initial_states(FFV1Context *f){

  755.     int i;

  756. 

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

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

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

  760.             return AVERROR(ENOMEM);

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

  762.     }

  763.     return 0;

  764. }

  765. 

  766. #if CONFIG_FFV1_ENCODER

  767. static int write_extra_header(FFV1Context *f){

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

  769.     uint8_t state[CONTEXT_SIZE];

  770.     int i, j, k;

  771.     uint8_t state2[32][CONTEXT_SIZE];

  772. 

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

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

  775. 

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

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

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

  779. 

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

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

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

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

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

  785.         }

  786.     }

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

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

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

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

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

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

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

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

  795. 

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

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

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

  799. 

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

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

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

  803.                 break;

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

  805.             put_rac(c, state, 1);

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

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

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

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

  810.                 }

  811.             }

  812.         }else{

  813.             put_rac(c, state, 0);

  814.         }

  815.     }

  816. 

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

  818. 

  819.     return 0;

  820. }

  821. 

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

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

  824. 

  825.     do{

  826.         changed=0;

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

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

  829. #define COST(old, new) \

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

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

  832. 

  833. #define COST2(old, new) \

  834.     COST(old, new)\

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

  836. 

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

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

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

  840.                     int j;

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

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

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

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

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

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

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

  848.                     }

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

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

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

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

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

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

  855.                         }

  856.                     }

  857.                     print=changed=1;

  858.                 }

  859.             }

  860.         }

  861.     }while(changed);

  862.     return print;

  863. }

  864. 

  865. static av_cold int encode_init(AVCodecContext *avctx)

  866. {

  867.     FFV1Context *s = avctx->priv_data;

  868.     int i, j, k, m;

  869. 

  870.     common_init(avctx);

  871. 

  872.     s->version=0;

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

  874. 

  875.     if(s->ac>1)

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

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

  878. 

  879.     s->plane_count=3;

  880.     switch(avctx->pix_fmt){

  881.     case PIX_FMT_YUV444P9:

  882.     case PIX_FMT_YUV422P9:

  883.     case PIX_FMT_YUV420P9:

  884.         if (!avctx->bits_per_raw_sample)

  885.             s->bits_per_raw_sample = 9;

  886.     case PIX_FMT_YUV444P10:

  887.     case PIX_FMT_YUV420P10:

  888.     case PIX_FMT_YUV422P10:

  889.         s->packed_at_lsb = 1;

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

  891.             s->bits_per_raw_sample = 10;

  892.     case PIX_FMT_GRAY16:

  893.     case PIX_FMT_YUV444P16:

  894.     case PIX_FMT_YUV422P16:

  895.     case PIX_FMT_YUV420P16:

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

  897.             s->bits_per_raw_sample = 16;

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

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

  900.         }

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

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

  903.             return -1;

  904.         }

  905.         if(!s->ac){

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

  907.             return -1;

  908.         }

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

  910.     case PIX_FMT_GRAY8:

  911.     case PIX_FMT_YUV444P:

  912.     case PIX_FMT_YUV440P:

  913.     case PIX_FMT_YUV422P:

  914.     case PIX_FMT_YUV420P:

  915.     case PIX_FMT_YUV411P:

  916.     case PIX_FMT_YUV410P:

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

  918.         s->colorspace= 0;

  919.         break;

  920.     case PIX_FMT_YUVA444P:

  921.     case PIX_FMT_YUVA420P:

  922.         s->chroma_planes= 1;

  923.         s->colorspace= 0;

  924.         s->transparency= 1;

  925.         break;

  926.     case PIX_FMT_RGB32:

  927.         s->colorspace= 1;

  928.         s->transparency= 1;

  929.         break;

  930.     case PIX_FMT_0RGB32:

  931.         s->colorspace= 1;

  932.         break;

  933.     default:

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

  935.         return -1;

  936.     }

  937.     if (s->transparency) {

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

  939.     }

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

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

  942.         return AVERROR(EINVAL);

  943.     }

  944. 

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

  946.         s->quant_table_count=2;

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

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

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

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

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

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

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

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

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

  956.         }else{

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

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

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

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

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

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

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

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

  965.         }

  966.     }

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

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

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

  970. 

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

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

  973. 

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

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

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

  977.     }

  978. 

  979.     if(allocate_initial_states(s) < 0)

  980.         return AVERROR(ENOMEM);

  981. 

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

  983.     if(!s->transparency)

  984.         s->plane_count= 2;

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

  986. 

  987.     s->picture_number=0;

  988. 

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

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

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

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

  993.                 return AVERROR(ENOMEM);

  994.         }

  995.     }

  996.     if(avctx->stats_in){

  997.         char *p= avctx->stats_in;

  998.         uint8_t best_state[256][256];

  999.         int gob_count=0;

  1000.         char *next;

  1001. 

  1002.         av_assert0(s->version>=2);

  1003. 

  1004.         for(;;){

  1005.             for(j=0; j<256; j++){

  1006.                 for(i=0; i<2; i++){

  1007.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1008.                     if(next==p){

  1009.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1010.                         return -1;

  1011.                     }

  1012.                     p=next;

  1013.                 }

  1014.             }

  1015.             for(i=0; i<s->quant_table_count; i++){

  1016.                 for(j=0; j<s->context_count[i]; j++){

  1017.                     for(k=0; k<32; k++){

  1018.                         for(m=0; m<2; m++){

  1019.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1020.                             if(next==p){

  1021.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1022.                                 return -1;

  1023.                             }

  1024.                             p=next;

  1025.                         }

  1026.                     }

  1027.                 }

  1028.             }

  1029.             gob_count= strtol(p, &next, 0);

  1030.             if(next==p || gob_count <0){

  1031.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1032.                 return -1;

  1033.             }

  1034.             p=next;

  1035.             while(*p=='\n' || *p==' ') p++;

  1036.             if(p[0]==0) break;

  1037.         }

  1038.         sort_stt(s, s->state_transition);

  1039. 

  1040.         find_best_state(best_state, s->state_transition);

  1041. 

  1042.         for(i=0; i<s->quant_table_count; i++){

  1043.             for(j=0; j<s->context_count[i]; j++){

  1044.                 for(k=0; k<32; k++){

  1045.                     double p= 128;

  1046.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1047.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1048.                     }

  1049.                     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)];

  1050.                 }

  1051.             }

  1052.         }

  1053.     }

  1054. 

  1055.     if(s->version>1){

  1056.         s->num_h_slices=2;

  1057.         s->num_v_slices=2;

  1058.         write_extra_header(s);

  1059.     }

  1060. 

  1061.     if(init_slice_contexts(s) < 0)

  1062.         return -1;

  1063.     if(init_slice_state(s) < 0)

  1064.         return -1;

  1065. 

  1066. #define STATS_OUT_SIZE 1024*1024*6

  1067.     if(avctx->flags & CODEC_FLAG_PASS1){

  1068.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

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

  1070.             for(j=0; j<s->slice_count; j++){

  1071.                 FFV1Context *sf= s->slice_context[j];

  1072.                 av_assert0(!sf->rc_stat2[i]);

  1073.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1074.                 if(!sf->rc_stat2[i])

  1075.                     return AVERROR(ENOMEM);

  1076.             }

  1077.         }

  1078.     }

  1079. 

  1080.     return 0;

  1081. }

  1082. #endif /* CONFIG_FFV1_ENCODER */

  1083. 

  1084. 

  1085. static void clear_state(FFV1Context *f){

  1086.     int i, si, j;

  1087. 

  1088.     for(si=0; si<f->slice_count; si++){

  1089.         FFV1Context *fs= f->slice_context[si];

  1090.         for(i=0; i<f->plane_count; i++){

  1091.             PlaneContext *p= &fs->plane[i];

  1092. 

  1093.             p->interlace_bit_state[0]= 128;

  1094.             p->interlace_bit_state[1]= 128;

  1095. 

  1096.             if(fs->ac){

  1097.                 if(f->initial_states[p->quant_table_index]){

  1098.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1099.                 }else

  1100.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1101.             }else{

  1102.                 for(j=0; j<p->context_count; j++){

  1103.                     p->vlc_state[j].drift= 0;

  1104.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1105.                     p->vlc_state[j].bias= 0;

  1106.                     p->vlc_state[j].count= 1;

  1107.                 }

  1108.             }

  1109.         }

  1110.     }

  1111. }

  1112. 

  1113. #if CONFIG_FFV1_ENCODER

  1114. static int encode_slice(AVCodecContext *c, void *arg){

  1115.     FFV1Context *fs= *(void**)arg;

  1116.     FFV1Context *f= fs->avctx->priv_data;

  1117.     int width = fs->slice_width;

  1118.     int height= fs->slice_height;

  1119.     int x= fs->slice_x;

  1120.     int y= fs->slice_y;

  1121.     AVFrame * const p= &f->picture;

  1122.     const int ps= (f->bits_per_raw_sample>8)+1;

  1123. 

  1124.     if(f->colorspace==0){

  1125.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1126.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1127.         const int cx= x>>f->chroma_h_shift;

  1128.         const int cy= y>>f->chroma_v_shift;

  1129. 

  1130.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1131. 

  1132.         if (f->chroma_planes){

  1133.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1134.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1135.         }

  1136.         if (fs->transparency)

  1137.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1138.     }else{

  1139.         encode_rgb_frame(fs, (uint32_t*)(p->data[0]) + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1140.     }

  1141.     emms_c();

  1142. 

  1143.     return 0;

  1144. }

  1145. 

  1146. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1147.                         const AVFrame *pict, int *got_packet)

  1148. {

  1149.     FFV1Context *f = avctx->priv_data;

  1150.     RangeCoder * const c= &f->slice_context[0]->c;

  1151.     AVFrame * const p= &f->picture;

  1152.     int used_count= 0;

  1153.     uint8_t keystate=128;

  1154.     uint8_t *buf_p;

  1155.     int i, ret;

  1156. 

  1157.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1158.                                   + FF_MIN_BUFFER_SIZE)) < 0)

  1159.         return ret;

  1160. 

  1161.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1162.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1163. 

  1164.     *p = *pict;

  1165.     p->pict_type= AV_PICTURE_TYPE_I;

  1166. 

  1167.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1168.         put_rac(c, &keystate, 1);

  1169.         p->key_frame= 1;

  1170.         f->gob_count++;

  1171.         write_header(f);

  1172.         clear_state(f);

  1173.     }else{

  1174.         put_rac(c, &keystate, 0);

  1175.         p->key_frame= 0;

  1176.     }

  1177. 

  1178.     if(!f->ac){

  1179.         used_count += ff_rac_terminate(c);

  1180. //printf("pos=%d\n", used_count);

  1181.         init_put_bits(&f->slice_context[0]->pb, pkt->data + used_count, pkt->size - used_count);

  1182.     }else if (f->ac>1){

  1183.         int i;

  1184.         for(i=1; i<256; i++){

  1185.             c->one_state[i]= f->state_transition[i];

  1186.             c->zero_state[256-i]= 256-c->one_state[i];

  1187.         }

  1188.     }

  1189. 

  1190.     for(i=1; i<f->slice_count; i++){

  1191.         FFV1Context *fs= f->slice_context[i];

  1192.         uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;

  1193.         int len = pkt->size/f->slice_count;

  1194. 

  1195.         if(fs->ac){

  1196.             ff_init_range_encoder(&fs->c, start, len);

  1197.         }else{

  1198.             init_put_bits(&fs->pb, start, len);

  1199.         }

  1200.     }

  1201.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1202. 

  1203.     buf_p = pkt->data;

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

  1205.         FFV1Context *fs= f->slice_context[i];

  1206.         int bytes;

  1207. 

  1208.         if(fs->ac){

  1209.             uint8_t state=128;

  1210.             put_rac(&fs->c, &state, 0);

  1211.             bytes= ff_rac_terminate(&fs->c);

  1212.         }else{

  1213.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1214.             bytes= used_count + (put_bits_count(&fs->pb)+7)/8;

  1215.             used_count= 0;

  1216.         }

  1217.         if(i>0){

  1218.             av_assert0(bytes < pkt->size/f->slice_count);

  1219.             memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);

  1220.             av_assert0(bytes < (1<<24));

  1221.             AV_WB24(buf_p+bytes, bytes);

  1222.             bytes+=3;

  1223.         }

  1224.         buf_p += bytes;

  1225.     }

  1226. 

  1227.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1228.         int j, k, m;

  1229.         char *p= avctx->stats_out;

  1230.         char *end= p + STATS_OUT_SIZE;

  1231. 

  1232.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1233.         for(i=0; i<f->quant_table_count; i++)

  1234.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1235. 

  1236.         for(j=0; j<f->slice_count; j++){

  1237.             FFV1Context *fs= f->slice_context[j];

  1238.             for(i=0; i<256; i++){

  1239.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1240.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1241.             }

  1242.             for(i=0; i<f->quant_table_count; i++){

  1243.                 for(k=0; k<f->context_count[i]; k++){

  1244.                     for(m=0; m<32; m++){

  1245.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1246.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1247.                     }

  1248.                 }

  1249.             }

  1250.         }

  1251. 

  1252.         for(j=0; j<256; j++){

  1253.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1254.             p+= strlen(p);

  1255.         }

  1256.         snprintf(p, end-p, "\n");

  1257. 

  1258.         for(i=0; i<f->quant_table_count; i++){

  1259.             for(j=0; j<f->context_count[i]; j++){

  1260.                 for(m=0; m<32; m++){

  1261.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1262.                     p+= strlen(p);

  1263.                 }

  1264.             }

  1265.         }

  1266.         snprintf(p, end-p, "%d\n", f->gob_count);

  1267.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1268.         avctx->stats_out[0] = '\0';

  1269. 

  1270.     f->picture_number++;

  1271.     pkt->size   = buf_p - pkt->data;

  1272.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1273.     *got_packet = 1;

  1274. 

  1275.     return 0;

  1276. }

  1277. #endif /* CONFIG_FFV1_ENCODER */

  1278. 

  1279. static av_cold int common_end(AVCodecContext *avctx){

  1280.     FFV1Context *s = avctx->priv_data;

  1281.     int i, j;

  1282. 

  1283.     if (avctx->codec->decode && s->picture.data[0])

  1284.         avctx->release_buffer(avctx, &s->picture);

  1285. 

  1286.     for(j=0; j<s->slice_count; j++){

  1287.         FFV1Context *fs= s->slice_context[j];

  1288.         for(i=0; i<s->plane_count; i++){

  1289.             PlaneContext *p= &fs->plane[i];

  1290. 

  1291.             av_freep(&p->state);

  1292.             av_freep(&p->vlc_state);

  1293.         }

  1294.         av_freep(&fs->sample_buffer);

  1295.     }

  1296. 

  1297.     av_freep(&avctx->stats_out);

  1298.     for(j=0; j<s->quant_table_count; j++){

  1299.         av_freep(&s->initial_states[j]);

  1300.         for(i=0; i<s->slice_count; i++){

  1301.             FFV1Context *sf= s->slice_context[i];

  1302.             av_freep(&sf->rc_stat2[j]);

  1303.         }

  1304.         av_freep(&s->rc_stat2[j]);

  1305.     }

  1306. 

  1307.     for(i=0; i<s->slice_count; i++){

  1308.         av_freep(&s->slice_context[i]);

  1309.     }

  1310. 

  1311.     return 0;

  1312. }

  1313. 

  1314. static av_always_inline void decode_line(FFV1Context *s, int w,

  1315.                                          int16_t *sample[2],

  1316.                                          int plane_index, int bits)

  1317. {

  1318.     PlaneContext * const p= &s->plane[plane_index];

  1319.     RangeCoder * const c= &s->c;

  1320.     int x;

  1321.     int run_count=0;

  1322.     int run_mode=0;

  1323.     int run_index= s->run_index;

  1324. 

  1325.     for(x=0; x<w; x++){

  1326.         int diff, context, sign;

  1327. 

  1328.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1329.         if(context < 0){

  1330.             context= -context;

  1331.             sign=1;

  1332.         }else

  1333.             sign=0;

  1334. 

  1335.         av_assert2(context < p->context_count);

  1336. 

  1337.         if(s->ac){

  1338.             diff= get_symbol_inline(c, p->state[context], 1);

  1339.         }else{

  1340.             if(context == 0 && run_mode==0) run_mode=1;

  1341. 

  1342.             if(run_mode){

  1343.                 if(run_count==0 && run_mode==1){

  1344.                     if(get_bits1(&s->gb)){

  1345.                         run_count = 1<<ff_log2_run[run_index];

  1346.                         if(x + run_count <= w) run_index++;

  1347.                     }else{

  1348.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1349.                         else run_count=0;

  1350.                         if(run_index) run_index--;

  1351.                         run_mode=2;

  1352.                     }

  1353.                 }

  1354.                 run_count--;

  1355.                 if(run_count < 0){

  1356.                     run_mode=0;

  1357.                     run_count=0;

  1358.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1359.                     if(diff>=0) diff++;

  1360.                 }else

  1361.                     diff=0;

  1362.             }else

  1363.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1364. 

  1365. //            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));

  1366.         }

  1367. 

  1368.         if(sign) diff= -diff;

  1369. 

  1370.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1371.     }

  1372.     s->run_index= run_index;

  1373. }

  1374. 

  1375. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1376.     int x, y;

  1377.     int16_t *sample[2];

  1378.     sample[0]=s->sample_buffer    +3;

  1379.     sample[1]=s->sample_buffer+w+6+3;

  1380. 

  1381.     s->run_index=0;

  1382. 

  1383.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1384. 

  1385.     for(y=0; y<h; y++){

  1386.         int16_t *temp = sample[0]; //FIXME try a normal buffer

  1387. 

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

  1389.         sample[1]= temp;

  1390. 

  1391.         sample[1][-1]= sample[0][0  ];

  1392.         sample[0][ w]= sample[0][w-1];

  1393. 

  1394. //{START_TIMER

  1395.         if(s->avctx->bits_per_raw_sample <= 8){

  1396.             decode_line(s, w, sample, plane_index, 8);

  1397.             for(x=0; x<w; x++){

  1398.                 src[x + stride*y]= sample[1][x];

  1399.             }

  1400.         }else{

  1401.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1402.             if(s->packed_at_lsb){

  1403.                 for(x=0; x<w; x++){

  1404.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1405.                 }

  1406.             }else{

  1407.                 for(x=0; x<w; x++){

  1408.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1409.                 }

  1410.             }

  1411.         }

  1412. //STOP_TIMER("decode-line")}

  1413.     }

  1414. }

  1415. 

  1416. static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){

  1417.     int x, y, p;

  1418.     int16_t *sample[4][2];

  1419.     for(x=0; x<4; x++){

  1420.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1421.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1422.     }

  1423. 

  1424.     s->run_index=0;

  1425. 

  1426.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1427. 

  1428.     for(y=0; y<h; y++){

  1429.         for(p=0; p<3 + s->transparency; p++){

  1430.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1431. 

  1432.             sample[p][0]= sample[p][1];

  1433.             sample[p][1]= temp;

  1434. 

  1435.             sample[p][1][-1]= sample[p][0][0  ];

  1436.             sample[p][0][ w]= sample[p][0][w-1];

  1437.             decode_line(s, w, sample[p], (p+1)/2, 9);

  1438.         }

  1439.         for(x=0; x<w; x++){

  1440.             int g= sample[0][1][x];

  1441.             int b= sample[1][1][x];

  1442.             int r= sample[2][1][x];

  1443.             int a= sample[3][1][x];

  1444. 

  1445. //            assert(g>=0 && b>=0 && r>=0);

  1446. //            assert(g<256 && b<512 && r<512);

  1447. 

  1448.             b -= 0x100;

  1449.             r -= 0x100;

  1450.             g -= (b + r)>>2;

  1451.             b += g;

  1452.             r += g;

  1453. 

  1454.             src[x + stride*y]= b + (g<<8) + (r<<16) + (a<<24);

  1455.         }

  1456.     }

  1457. }

  1458. 

  1459. static int decode_slice(AVCodecContext *c, void *arg){

  1460.     FFV1Context *fs= *(void**)arg;

  1461.     FFV1Context *f= fs->avctx->priv_data;

  1462.     int width = fs->slice_width;

  1463.     int height= fs->slice_height;

  1464.     int x= fs->slice_x;

  1465.     int y= fs->slice_y;

  1466.     const int ps= (c->bits_per_raw_sample>8)+1;

  1467.     AVFrame * const p= &f->picture;

  1468. 

  1469.     av_assert1(width && height);

  1470.     if(f->colorspace==0){

  1471.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1472.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1473.         const int cx= x>>f->chroma_h_shift;

  1474.         const int cy= y>>f->chroma_v_shift;

  1475.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1476. 

  1477.         if (f->chroma_planes){

  1478.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1479.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1480.         }

  1481.         if (fs->transparency)

  1482.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1483.     }else{

  1484.         decode_rgb_frame(fs, (uint32_t*)p->data[0] + ps*x + y*(p->linesize[0]/4), width, height, p->linesize[0]/4);

  1485.     }

  1486. 

  1487.     emms_c();

  1488. 

  1489.     return 0;

  1490. }

  1491. 

  1492. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1493.     int v;

  1494.     int i=0;

  1495.     uint8_t state[CONTEXT_SIZE];

  1496. 

  1497.     memset(state, 128, sizeof(state));

  1498. 

  1499.     for(v=0; i<128 ; v++){

  1500.         int len= get_symbol(c, state, 0) + 1;

  1501. 

  1502.         if(len + i > 128) return -1;

  1503. 

  1504.         while(len--){

  1505.             quant_table[i] = scale*v;

  1506.             i++;

  1507. //printf("%2d ",v);

  1508. //if(i%16==0) printf("\n");

  1509.         }

  1510.     }

  1511. 

  1512.     for(i=1; i<128; i++){

  1513.         quant_table[256-i]= -quant_table[i];

  1514.     }

  1515.     quant_table[128]= -quant_table[127];

  1516. 

  1517.     return 2*v - 1;

  1518. }

  1519. 

  1520. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1521.     int i;

  1522.     int context_count=1;

  1523. 

  1524.     for(i=0; i<5; i++){

  1525.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1526.         if(context_count > 32768U){

  1527.             return -1;

  1528.         }

  1529.     }

  1530.     return (context_count+1)/2;

  1531. }

  1532. 

  1533. static int read_extra_header(FFV1Context *f){

  1534.     RangeCoder * const c= &f->c;

  1535.     uint8_t state[CONTEXT_SIZE];

  1536.     int i, j, k;

  1537.     uint8_t state2[32][CONTEXT_SIZE];

  1538. 

  1539.     memset(state2, 128, sizeof(state2));

  1540.     memset(state, 128, sizeof(state));

  1541. 

  1542.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1543.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1544. 

  1545.     f->version= get_symbol(c, state, 0);

  1546.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1547.     if(f->ac>1){

  1548.         for(i=1; i<256; i++){

  1549.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1550.         }

  1551.     }

  1552.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1553.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1554.     get_rac(c, state); //no chroma = false

  1555.     f->chroma_h_shift= get_symbol(c, state, 0);

  1556.     f->chroma_v_shift= get_symbol(c, state, 0);

  1557.     f->transparency= get_rac(c, state);

  1558.     f->plane_count= 2 + f->transparency;

  1559.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1560.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1561.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1562.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1563.         return -1;

  1564.     }

  1565. 

  1566.     f->quant_table_count= get_symbol(c, state, 0);

  1567.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1568.         return -1;

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

  1570.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1571.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1572.             return -1;

  1573.         }

  1574.     }

  1575. 

  1576.     if(allocate_initial_states(f) < 0)

  1577.         return AVERROR(ENOMEM);

  1578. 

  1579.     for(i=0; i<f->quant_table_count; i++){

  1580.         if(get_rac(c, state)){

  1581.             for(j=0; j<f->context_count[i]; j++){

  1582.                 for(k=0; k<CONTEXT_SIZE; k++){

  1583.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1584.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1585.                 }

  1586.             }

  1587.         }

  1588.     }

  1589. 

  1590.     return 0;

  1591. }

  1592. 

  1593. static int read_header(FFV1Context *f){

  1594.     uint8_t state[CONTEXT_SIZE];

  1595.     int i, j, context_count;

  1596.     RangeCoder * const c= &f->slice_context[0]->c;

  1597. 

  1598.     memset(state, 128, sizeof(state));

  1599. 

  1600.     if(f->version < 2){

  1601.         f->version= get_symbol(c, state, 0);

  1602.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1603.         if(f->ac>1){

  1604.             for(i=1; i<256; i++){

  1605.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1606.             }

  1607.         }

  1608.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1609.         if(f->version>0)

  1610.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1611.         f->chroma_planes= get_rac(c, state);

  1612.         f->chroma_h_shift= get_symbol(c, state, 0);

  1613.         f->chroma_v_shift= get_symbol(c, state, 0);

  1614.         f->transparency= get_rac(c, state);

  1615.         f->plane_count= 2 + f->transparency;

  1616.     }

  1617. 

  1618.     if(f->colorspace==0){

  1619.         if(!f->transparency && !f->chroma_planes){

  1620.             if (f->avctx->bits_per_raw_sample<=8)

  1621.                 f->avctx->pix_fmt= PIX_FMT_GRAY8;

  1622.             else

  1623.                 f->avctx->pix_fmt= PIX_FMT_GRAY16;

  1624.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1625.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1626.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;

  1627.             case 0x01: f->avctx->pix_fmt= PIX_FMT_YUV440P; break;

  1628.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;

  1629.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;

  1630.             case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;

  1631.             case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;

  1632.             default:

  1633.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1634.                 return -1;

  1635.             }

  1636.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1637.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1638.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUVA444P; break;

  1639.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUVA420P; break;

  1640.             default:

  1641.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1642.                 return -1;

  1643.             }

  1644.         }else if(f->avctx->bits_per_raw_sample==9) {

  1645.             f->packed_at_lsb=1;

  1646.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1647.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P9; break;

  1648.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P9; break;

  1649.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P9; break;

  1650.             default:

  1651.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1652.                 return -1;

  1653.             }

  1654.         }else if(f->avctx->bits_per_raw_sample==10) {

  1655.             f->packed_at_lsb=1;

  1656.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1657.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P10; break;

  1658.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P10; break;

  1659.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P10; break;

  1660.             default:

  1661.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1662.                 return -1;

  1663.             }

  1664.         }else {

  1665.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1666.             case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P16; break;

  1667.             case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P16; break;

  1668.             case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P16; break;

  1669.             default:

  1670.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1671.                 return -1;

  1672.             }

  1673.         }

  1674.     }else if(f->colorspace==1){

  1675.         if(f->chroma_h_shift || f->chroma_v_shift){

  1676.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1677.             return -1;

  1678.         }

  1679.         if(f->transparency) f->avctx->pix_fmt= PIX_FMT_RGB32;

  1680.         else                f->avctx->pix_fmt= PIX_FMT_0RGB32;

  1681.     }else{

  1682.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1683.         return -1;

  1684.     }

  1685. 

  1686. //printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);

  1687.     if(f->version < 2){

  1688.         context_count= read_quant_tables(c, f->quant_table);

  1689.         if(context_count < 0){

  1690.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1691.                 return -1;

  1692.         }

  1693.     }else{

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

  1695.         if(f->slice_count > (unsigned)MAX_SLICES)

  1696.             return -1;

  1697.     }

  1698. 

  1699.     for(j=0; j<f->slice_count; j++){

  1700.         FFV1Context *fs= f->slice_context[j];

  1701.         fs->ac= f->ac;

  1702.         fs->packed_at_lsb= f->packed_at_lsb;

  1703. 

  1704.         if(f->version >= 2){

  1705.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1706.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1707.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1708.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1709. 

  1710.             fs->slice_x /= f->num_h_slices;

  1711.             fs->slice_y /= f->num_v_slices;

  1712.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1713.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1714.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1715.                 return -1;

  1716.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1717.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1718.                 return -1;

  1719.         }

  1720. 

  1721.         for(i=0; i<f->plane_count; i++){

  1722.             PlaneContext * const p= &fs->plane[i];

  1723. 

  1724.             if(f->version >= 2){

  1725.                 int idx=get_symbol(c, state, 0);

  1726.                 if(idx > (unsigned)f->quant_table_count){

  1727.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1728.                     return -1;

  1729.                 }

  1730.                 p->quant_table_index= idx;

  1731.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1732.                 context_count= f->context_count[idx];

  1733.             }else{

  1734.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  1735.             }

  1736. 

  1737.             if(p->context_count < context_count){

  1738.                 av_freep(&p->state);

  1739.                 av_freep(&p->vlc_state);

  1740.             }

  1741.             p->context_count= context_count;

  1742.         }

  1743.     }

  1744. 

  1745.     return 0;

  1746. }

  1747. 

  1748. static av_cold int decode_init(AVCodecContext *avctx)

  1749. {

  1750.     FFV1Context *f = avctx->priv_data;

  1751. 

  1752.     common_init(avctx);

  1753. 

  1754.     if(avctx->extradata && read_extra_header(f) < 0)

  1755.         return -1;

  1756. 

  1757.     if(init_slice_contexts(f) < 0)

  1758.         return -1;

  1759. 

  1760.     return 0;

  1761. }

  1762. 

  1763. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  1764.     const uint8_t *buf = avpkt->data;

  1765.     int buf_size = avpkt->size;

  1766.     FFV1Context *f = avctx->priv_data;

  1767.     RangeCoder * const c= &f->slice_context[0]->c;

  1768.     AVFrame * const p= &f->picture;

  1769.     int bytes_read, i;

  1770.     uint8_t keystate= 128;

  1771.     const uint8_t *buf_p;

  1772. 

  1773.     AVFrame *picture = data;

  1774. 

  1775.     /* release previously stored data */

  1776.     if (p->data[0])

  1777.         avctx->release_buffer(avctx, p);

  1778. 

  1779.     ff_init_range_decoder(c, buf, buf_size);

  1780.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1781. 

  1782. 

  1783.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  1784.     if(get_rac(c, &keystate)){

  1785.         p->key_frame= 1;

  1786.         if(read_header(f) < 0)

  1787.             return -1;

  1788.         if(init_slice_state(f) < 0)

  1789.             return -1;

  1790. 

  1791.         clear_state(f);

  1792.     }else{

  1793.         p->key_frame= 0;

  1794.     }

  1795.     if(f->ac>1){

  1796.         int i;

  1797.         for(i=1; i<256; i++){

  1798.             c->one_state[i]= f->state_transition[i];

  1799.             c->zero_state[256-i]= 256-c->one_state[i];

  1800.         }

  1801.     }

  1802. 

  1803.     p->reference= 0;

  1804.     if(avctx->get_buffer(avctx, p) < 0){

  1805.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  1806.         return -1;

  1807.     }

  1808. 

  1809.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  1810.         av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);

  1811. 

  1812.     if(!f->ac){

  1813.         bytes_read = c->bytestream - c->bytestream_start - 1;

  1814.         if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME

  1815. //printf("pos=%d\n", bytes_read);

  1816.         init_get_bits(&f->slice_context[0]->gb, buf + bytes_read, (buf_size - bytes_read) * 8);

  1817.     } else {

  1818.         bytes_read = 0; /* avoid warning */

  1819.     }

  1820. 

  1821.     buf_p= buf + buf_size;

  1822.     for(i=f->slice_count-1; i>0; i--){

  1823.         FFV1Context *fs= f->slice_context[i];

  1824.         int v= AV_RB24(buf_p-3)+3;

  1825.         if(buf_p - buf <= v){

  1826.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  1827.             return -1;

  1828.         }

  1829.         buf_p -= v;

  1830.         if(fs->ac){

  1831.             ff_init_range_decoder(&fs->c, buf_p, v);

  1832.         }else{

  1833.             init_get_bits(&fs->gb, buf_p, v * 8);

  1834.         }

  1835.     }

  1836. 

  1837.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1838.     f->picture_number++;

  1839. 

  1840.     *picture= *p;

  1841.     *data_size = sizeof(AVFrame);

  1842. 

  1843.     return buf_size;

  1844. }

  1845. 

  1846. AVCodec ff_ffv1_decoder = {

  1847.     .name           = "ffv1",

  1848.     .type           = AVMEDIA_TYPE_VIDEO,

  1849.     .id             = CODEC_ID_FFV1,

  1850.     .priv_data_size = sizeof(FFV1Context),

  1851.     .init           = decode_init,

  1852.     .close          = common_end,

  1853.     .decode         = decode_frame,

  1854.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ | CODEC_CAP_SLICE_THREADS,

  1855.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1856. };

  1857. 

  1858. #if CONFIG_FFV1_ENCODER

  1859. AVCodec ff_ffv1_encoder = {

  1860.     .name           = "ffv1",

  1861.     .type           = AVMEDIA_TYPE_VIDEO,

  1862.     .id             = CODEC_ID_FFV1,

  1863.     .priv_data_size = sizeof(FFV1Context),

  1864.     .init           = encode_init,

  1865.     .encode2        = encode_frame,

  1866.     .close          = common_end,

  1867.     .capabilities = CODEC_CAP_SLICE_THREADS,

  1868.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUVA420P, PIX_FMT_YUV444P, PIX_FMT_YUVA444P, PIX_FMT_YUV440P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_0RGB32, PIX_FMT_RGB32, PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16, PIX_FMT_YUV444P9, PIX_FMT_YUV422P9, PIX_FMT_YUV420P9, PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_YUV444P10, PIX_FMT_GRAY16, PIX_FMT_GRAY8, PIX_FMT_NONE},

  1869.     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1870. };

  1871. #endif