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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

  4.  * Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

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

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "internal.h"

  30. #include "get_bits.h"

  31. #include "put_bits.h"

  32. #include "dsputil.h"

  33. #include "rangecoder.h"

  34. #include "golomb.h"

  35. #include "mathops.h"

  36. #include "libavutil/pixdesc.h"

  37. #include "libavutil/avassert.h"

  38. #include "libavutil/crc.h"

  39. #include "libavutil/opt.h"

  40. #include "libavutil/imgutils.h"

  41. #include "libavutil/timer.h"

  42. 

  43. #ifdef __INTEL_COMPILER

  44. #undef av_flatten

  45. #define av_flatten

  46. #endif

  47. 

  48. #define MAX_PLANES 4

  49. #define CONTEXT_SIZE 32

  50. 

  51. #define MAX_QUANT_TABLES 8

  52. #define MAX_CONTEXT_INPUTS 5

  53. 

  54. extern const uint8_t ff_log2_run[41];

  55. 

  56. static const int8_t quant5_10bit[256]={

  57.  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,

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

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

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

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

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

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

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

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

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

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

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

  69. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,

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

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

  72. -1,-1,-1,-1,-1,-1,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,

  73. };

  74. 

  75. static const int8_t quant5[256]={

  76.  0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  91. -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,

  92. };

  93. 

  94. static const int8_t quant9_10bit[256]={

  95.  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,

  96.  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,

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

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

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

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

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

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

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

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

  107. -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,

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

  109. -3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  110. -2,-2,-2,-2,-1,-1,-1,-1,-1,-1,-1,-1,-0,-0,-0,-0,

  111. };

  112. 

  113. static const int8_t quant11[256]={

  114.  0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,

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

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

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

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

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

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

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

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

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

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

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

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

  127. -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,

  128. -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,

  129. -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,

  130. };

  131. 

  132. static const uint8_t ver2_state[256]= {

  133.    0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  134.   59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  135.   40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  136.   53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  137.   87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  138.   85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93, 134,  95,  98, 105,  98,

  139.  105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  140.  115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

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

  142.  147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  143.  172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  144.  175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  145.  197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  146.  209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  147.  226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  148.  241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  149. };

  150. 

  151. typedef struct VlcState{

  152.     int16_t drift;

  153.     uint16_t error_sum;

  154.     int8_t bias;

  155.     uint8_t count;

  156. } VlcState;

  157. 

  158. typedef struct PlaneContext{

  159.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

  160.     int quant_table_index;

  161.     int context_count;

  162.     uint8_t (*state)[CONTEXT_SIZE];

  163.     VlcState *vlc_state;

  164.     uint8_t interlace_bit_state[2];

  165. } PlaneContext;

  166. 

  167. #define MAX_SLICES 256

  168. 

  169. typedef struct FFV1Context{

  170.     AVClass *class;

  171.     AVCodecContext *avctx;

  172.     RangeCoder c;

  173.     GetBitContext gb;

  174.     PutBitContext pb;

  175.     uint64_t rc_stat[256][2];

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

  177.     int version;

  178.     int minor_version;

  179.     int width, height;

  180.     int chroma_h_shift, chroma_v_shift;

  181.     int chroma_planes;

  182.     int transparency;

  183.     int flags;

  184.     int picture_number;

  185.     AVFrame picture;

  186.     AVFrame last_picture;

  187.     int plane_count;

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

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

  190.     PlaneContext plane[MAX_PLANES];

  191.     int16_t quant_table[MAX_CONTEXT_INPUTS][256];

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

  193.     int context_count[MAX_QUANT_TABLES];

  194.     uint8_t state_transition[256];

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

  196.     int run_index;

  197.     int colorspace;

  198.     int16_t *sample_buffer;

  199.     int gob_count;

  200.     int packed_at_lsb;

  201.     int ec;

  202.     int slice_damaged;

  203.     int key_frame_ok;

  204. 

  205.     int quant_table_count;

  206. 

  207.     DSPContext dsp;

  208. 

  209.     struct FFV1Context *slice_context[MAX_SLICES];

  210.     int slice_count;

  211.     int num_v_slices;

  212.     int num_h_slices;

  213.     int slice_width;

  214.     int slice_height;

  215.     int slice_x;

  216.     int slice_y;

  217.     int bits_per_raw_sample;

  218. }FFV1Context;

  219. 

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

  221.     if(bits==8)

  222.         diff= (int8_t)diff;

  223.     else{

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

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

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

  227.     }

  228. 

  229.     return diff;

  230. }

  231. 

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

  233. {

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

  235.     const int  T= last[ 0];

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

  237. 

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

  239. }

  240. 

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

  242.                               int16_t *last, int16_t *last2)

  243. {

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

  245.     const int  T= last[ 0];

  246.     const int RT= last[ 1];

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

  248. 

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

  250.         const int TT= last2[0];

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

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

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

  254.     }else

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

  256. }

  257. 

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

  259.     int i,j,k,m;

  260.     double l2tab[256];

  261. 

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

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

  264. 

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

  266.         double best_len[256];

  267.         double p= i/256.0;

  268. 

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

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

  271. 

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

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

  274.             double len=0;

  275.             occ[j]=1.0;

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

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

  278.                 for(m=1; m<256; m++){

  279.                     if(occ[m]){

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

  281.                                       + (1-p)*l2tab[256-m]);

  282.                     }

  283.                 }

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

  285.                     best_len[k]= len;

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

  287.                 }

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

  289.                     if(occ[m]){

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

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

  292.                     }

  293.                 }

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

  295.             }

  296.         }

  297.     }

  298. }

  299. 

  300. 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]){

  301.     int i;

  302. 

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

  304. do{\

  305.     if(rc_stat){\

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

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

  308.     }\

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

  310. }while(0)

  311. 

  312.     if(v){

  313.         const int a= FFABS(v);

  314.         const int e= av_log2(a);

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

  316.         if(e<=9){

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

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

  319.             }

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

  321. 

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

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

  324.             }

  325. 

  326.             if(is_signed)

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

  328.         }else{

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

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

  331.             }

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

  333. 

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

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

  336.             }

  337. 

  338.             if(is_signed)

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

  340.         }

  341.     }else{

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

  343.     }

  344. #undef put_rac

  345. }

  346. 

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

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

  349. }

  350. 

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

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

  353.         return 0;

  354.     else{

  355.         int i, e, a;

  356.         e= 0;

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

  358.             e++;

  359.         }

  360. 

  361.         a= 1;

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

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

  364.         }

  365. 

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

  367.         return (a^e)-e;

  368.     }

  369. }

  370. 

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

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

  373. }

  374. 

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

  376.     int drift= state->drift;

  377.     int count= state->count;

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

  379.     drift += v;

  380. 

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

  382.         count >>= 1;

  383.         drift >>= 1;

  384.         state->error_sum >>= 1;

  385.     }

  386.     count++;

  387. 

  388.     if(drift <= -count){

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

  390. 

  391.         drift += count;

  392.         if(drift <= -count)

  393.             drift= -count + 1;

  394.     }else if(drift > 0){

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

  396. 

  397.         drift -= count;

  398.         if(drift > 0)

  399.             drift= 0;

  400.     }

  401. 

  402.     state->drift= drift;

  403.     state->count= count;

  404. }

  405. 

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

  407.     int i, k, code;

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

  409. 

  410.     i= state->count;

  411.     k=0;

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

  413.         k++;

  414.         i += i;

  415.     }

  416. 

  417.     av_assert2(k<=13);

  418. 

  419. #if 0 // JPEG LS

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

  421.     else                                         code= v;

  422. #else

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

  424. #endif

  425. 

  426.      av_dlog(NULL, "v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code,

  427.              state->bias, state->error_sum, state->drift, state->count, k);

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

  429. 

  430.     update_vlc_state(state, v);

  431. }

  432. 

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

  434.     int k, i, v, ret;

  435. 

  436.     i= state->count;

  437.     k=0;

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

  439.         k++;

  440.         i += i;

  441.     }

  442. 

  443.     assert(k<=8);

  444. 

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

  446.     av_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",

  447.             v, state->bias, state->error_sum, state->drift, state->count, k);

  448. 

  449. #if 0 // JPEG LS

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

  451. #else

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

  453. #endif

  454. 

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

  456. 

  457.     update_vlc_state(state, v);

  458. 

  459.     return ret;

  460. }

  461. 

  462. #if CONFIG_FFV1_ENCODER

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

  464.                                         int16_t *sample[3],

  465.                                         int plane_index, int bits)

  466. {

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

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

  469.     int x;

  470.     int run_index= s->run_index;

  471.     int run_count=0;

  472.     int run_mode=0;

  473. 

  474.     if(s->ac){

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

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

  477.             return -1;

  478.         }

  479.     }else{

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

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

  482.             return -1;

  483.         }

  484.     }

  485. 

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

  487.         int diff, context;

  488. 

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

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

  491. 

  492.         if(context < 0){

  493.             context = -context;

  494.             diff= -diff;

  495.         }

  496. 

  497.         diff= fold(diff, bits);

  498. 

  499.         if(s->ac){

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

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

  502.             }else{

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

  504.             }

  505.         }else{

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

  507. 

  508.             if(run_mode){

  509. 

  510.                 if(diff){

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

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

  513.                         run_index++;

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

  515.                     }

  516. 

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

  518.                     if(run_index) run_index--;

  519.                     run_count=0;

  520.                     run_mode=0;

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

  522.                 }else{

  523.                     run_count++;

  524.                 }

  525.             }

  526. 

  527.             av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",

  528.                     run_count, run_index, run_mode, x,

  529.                     (int)put_bits_count(&s->pb));

  530. 

  531.             if(run_mode == 0)

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

  533.         }

  534.     }

  535.     if(run_mode){

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

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

  538.             run_index++;

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

  540.         }

  541. 

  542.         if(run_count)

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

  544.     }

  545.     s->run_index= run_index;

  546. 

  547.     return 0;

  548. }

  549. 

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

  551.     int x,y,i;

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

  553.     int16_t *sample[3];

  554.     s->run_index=0;

  555. 

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

  557. 

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

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

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

  561. 

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

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

  564. //{START_TIMER

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

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

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

  568.             }

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

  570.         }else{

  571.             if(s->packed_at_lsb){

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

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

  574.                 }

  575.             }else{

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

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

  578.                 }

  579.             }

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

  581.         }

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

  583.     }

  584. }

  585. 

  586. static void encode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3]){

  587.     int x, y, p, i;

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

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

  590.     int lbd=  s->avctx->bits_per_raw_sample <= 8;

  591.     int bits= s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;

  592.     int offset= 1 << bits;

  593.     s->run_index=0;

  594. 

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

  596. 

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

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

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

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

  601. 

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

  603.             int b,g,r,av_uninit(a);

  604.             if(lbd){

  605.                 unsigned v= *((uint32_t*)(src[0] + x*4 + stride[0]*y));

  606.                 b= v&0xFF;

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

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

  609.                 a=  v>>24;

  610.             }else{

  611.                 b= *((uint16_t*)(src[0] + x*2 + stride[0]*y));

  612.                 g= *((uint16_t*)(src[1] + x*2 + stride[1]*y));

  613.                 r= *((uint16_t*)(src[2] + x*2 + stride[2]*y));

  614.             }

  615. 

  616.             b -= g;

  617.             r -= g;

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

  619.             b += offset;

  620.             r += offset;

  621. 

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

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

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

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

  626.         }

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

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

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

  630.             if (lbd)

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

  632.             else

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

  634.         }

  635.     }

  636. }

  637. 

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

  639.     int last=0;

  640.     int i;

  641.     uint8_t state[CONTEXT_SIZE];

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

  643. 

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

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

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

  647.             last= i;

  648.         }

  649.     }

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

  651. }

  652. 

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

  654.     int i;

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

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

  657. }

  658. 

  659. static void write_header(FFV1Context *f){

  660.     uint8_t state[CONTEXT_SIZE];

  661.     int i, j;

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

  663. 

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

  665. 

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

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

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

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

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

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

  672.             }

  673.         }

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

  675.         if(f->version>0)

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

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

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

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

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

  681. 

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

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

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

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

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

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

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

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

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

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

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

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

  694.             }

  695.         }

  696.     }

  697. }

  698. #endif /* CONFIG_FFV1_ENCODER */

  699. 

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

  701.     FFV1Context *s = avctx->priv_data;

  702. 

  703.     if(!avctx->width || !avctx->height)

  704.         return AVERROR_INVALIDDATA;

  705. 

  706.     s->avctx= avctx;

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

  708. 

  709.     avcodec_get_frame_defaults(&s->picture);

  710. 

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

  712. 

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

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

  715. 

  716.     //defaults

  717.     s->num_h_slices=1;

  718.     s->num_v_slices=1;

  719. 

  720. 

  721.     return 0;

  722. }

  723. 

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

  725.     int j;

  726. 

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

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

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

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

  731. 

  732.             if(fs->ac){

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

  734.                 if(!p->    state)

  735.                     return AVERROR(ENOMEM);

  736.             }else{

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

  738.                 if(!p->vlc_state)

  739.                     return AVERROR(ENOMEM);

  740.             }

  741.         }

  742. 

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

  744.             //FIXME only redo if state_transition changed

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

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

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

  748.             }

  749.         }

  750. 

  751.     return 0;

  752. }

  753. 

  754. static int init_slices_state(FFV1Context *f){

  755.     int i;

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

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

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

  759.             return -1;

  760.     }

  761.     return 0;

  762. }

  763. 

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

  765.     int i;

  766. 

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

  768. 

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

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

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

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

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

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

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

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

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

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

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

  780. 

  781.         fs->slice_width = sxe - sxs;

  782.         fs->slice_height= sye - sys;

  783.         fs->slice_x     = sxs;

  784.         fs->slice_y     = sys;

  785. 

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

  787.         if (!fs->sample_buffer)

  788.             return AVERROR(ENOMEM);

  789.     }

  790.     return 0;

  791. }

  792. 

  793. static int allocate_initial_states(FFV1Context *f){

  794.     int i;

  795. 

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

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

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

  799.             return AVERROR(ENOMEM);

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

  801.     }

  802.     return 0;

  803. }

  804. 

  805. #if CONFIG_FFV1_ENCODER

  806. static int write_extra_header(FFV1Context *f){

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

  808.     uint8_t state[CONTEXT_SIZE];

  809.     int i, j, k;

  810.     uint8_t state2[32][CONTEXT_SIZE];

  811.     unsigned v;

  812. 

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

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

  815. 

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

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

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

  819. 

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

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

  822.         if(f->version == 3)

  823.             f->minor_version = 2;

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

  825.     }

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

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

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

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

  830.         }

  831.     }

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

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

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

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

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

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

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

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

  840. 

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

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

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

  844. 

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

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

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

  848.                 break;

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

  850.             put_rac(c, state, 1);

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

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

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

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

  855.                 }

  856.             }

  857.         }else{

  858.             put_rac(c, state, 0);

  859.         }

  860.     }

  861. 

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

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

  864.     }

  865. 

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

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

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

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

  870. 

  871.     return 0;

  872. }

  873. 

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

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

  876. 

  877.     do{

  878.         changed=0;

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

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

  881. #define COST(old, new) \

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

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

  884. 

  885. #define COST2(old, new) \

  886.     COST(old, new)\

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

  888. 

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

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

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

  892.                     int j;

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

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

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

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

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

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

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

  900.                     }

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

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

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

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

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

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

  907.                         }

  908.                     }

  909.                     print=changed=1;

  910.                 }

  911.             }

  912.         }

  913.     }while(changed);

  914.     return print;

  915. }

  916. 

  917. static av_cold int encode_init(AVCodecContext *avctx)

  918. {

  919.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);

  920.     FFV1Context *s = avctx->priv_data;

  921.     int i, j, k, m;

  922. 

  923.     common_init(avctx);

  924. 

  925.     s->version=0;

  926. 

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

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

  929. 

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

  931.         s->version = 3;

  932.     }

  933. 

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

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

  936.     }

  937. 

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

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

  940.         return AVERROR_INVALIDDATA;

  941.     }

  942. 

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

  944. 

  945.     s->plane_count=3;

  946.     switch(avctx->pix_fmt){

  947.     case AV_PIX_FMT_YUV444P9:

  948.     case AV_PIX_FMT_YUV422P9:

  949.     case AV_PIX_FMT_YUV420P9:

  950.         if (!avctx->bits_per_raw_sample)

  951.             s->bits_per_raw_sample = 9;

  952.     case AV_PIX_FMT_YUV444P10:

  953.     case AV_PIX_FMT_YUV420P10:

  954.     case AV_PIX_FMT_YUV422P10:

  955.         s->packed_at_lsb = 1;

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

  957.             s->bits_per_raw_sample = 10;

  958.     case AV_PIX_FMT_GRAY16:

  959.     case AV_PIX_FMT_YUV444P16:

  960.     case AV_PIX_FMT_YUV422P16:

  961.     case AV_PIX_FMT_YUV420P16:

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

  963.             s->bits_per_raw_sample = 16;

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

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

  966.         }

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

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

  969.             return AVERROR_INVALIDDATA;

  970.         }

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

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

  973.             s->ac = 2;

  974.         }

  975.         if(!s->ac){

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

  977.             return AVERROR_INVALIDDATA;

  978.         }

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

  980.     case AV_PIX_FMT_GRAY8:

  981.     case AV_PIX_FMT_YUV444P:

  982.     case AV_PIX_FMT_YUV440P:

  983.     case AV_PIX_FMT_YUV422P:

  984.     case AV_PIX_FMT_YUV420P:

  985.     case AV_PIX_FMT_YUV411P:

  986.     case AV_PIX_FMT_YUV410P:

  987.         s->chroma_planes= desc->nb_components < 3 ? 0 : 1;

  988.         s->colorspace= 0;

  989.         break;

  990.     case AV_PIX_FMT_YUVA444P:

  991.     case AV_PIX_FMT_YUVA422P:

  992.     case AV_PIX_FMT_YUVA420P:

  993.         s->chroma_planes= 1;

  994.         s->colorspace= 0;

  995.         s->transparency= 1;

  996.         break;

  997.     case AV_PIX_FMT_RGB32:

  998.         s->colorspace= 1;

  999.         s->transparency= 1;

  1000.         break;

  1001.     case AV_PIX_FMT_0RGB32:

  1002.         s->colorspace= 1;

  1003.         break;

  1004.     case AV_PIX_FMT_GBRP9:

  1005.         if (!avctx->bits_per_raw_sample)

  1006.             s->bits_per_raw_sample = 9;

  1007.     case AV_PIX_FMT_GBRP10:

  1008.         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)

  1009.             s->bits_per_raw_sample = 10;

  1010.     case AV_PIX_FMT_GBRP12:

  1011.         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)

  1012.             s->bits_per_raw_sample = 12;

  1013.     case AV_PIX_FMT_GBRP14:

  1014.         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)

  1015.             s->bits_per_raw_sample = 14;

  1016.         else if (!s->bits_per_raw_sample)

  1017.             s->bits_per_raw_sample = avctx->bits_per_raw_sample;

  1018.         s->colorspace= 1;

  1019.         s->chroma_planes= 1;

  1020.         s->version= FFMAX(s->version, 1);

  1021.         break;

  1022.     default:

  1023.         av_log(avctx, AV_LOG_ERROR, "format not supported\n");

  1024.         return AVERROR_INVALIDDATA;

  1025.     }

  1026.     if (s->transparency) {

  1027.         av_log(avctx, AV_LOG_WARNING, "Storing alpha plane, this will require a recent FFV1 decoder to playback!\n");

  1028.     }

  1029.     if (avctx->context_model > 1U) {

  1030.         av_log(avctx, AV_LOG_ERROR, "Invalid context model %d, valid values are 0 and 1\n", avctx->context_model);

  1031.         return AVERROR(EINVAL);

  1032.     }

  1033. 

  1034.     if(s->ac>1)

  1035.         for(i=1; i<256; i++)

  1036.             s->state_transition[i]=ver2_state[i];

  1037. 

  1038.     for(i=0; i<256; i++){

  1039.         s->quant_table_count=2;

  1040.         if(s->bits_per_raw_sample <=8){

  1041.             s->quant_tables[0][0][i]=           quant11[i];

  1042.             s->quant_tables[0][1][i]=        11*quant11[i];

  1043.             s->quant_tables[0][2][i]=     11*11*quant11[i];

  1044.             s->quant_tables[1][0][i]=           quant11[i];

  1045.             s->quant_tables[1][1][i]=        11*quant11[i];

  1046.             s->quant_tables[1][2][i]=     11*11*quant5 [i];

  1047.             s->quant_tables[1][3][i]=   5*11*11*quant5 [i];

  1048.             s->quant_tables[1][4][i]= 5*5*11*11*quant5 [i];

  1049.         }else{

  1050.             s->quant_tables[0][0][i]=           quant9_10bit[i];

  1051.             s->quant_tables[0][1][i]=        11*quant9_10bit[i];

  1052.             s->quant_tables[0][2][i]=     11*11*quant9_10bit[i];

  1053.             s->quant_tables[1][0][i]=           quant9_10bit[i];

  1054.             s->quant_tables[1][1][i]=        11*quant9_10bit[i];

  1055.             s->quant_tables[1][2][i]=     11*11*quant5_10bit[i];

  1056.             s->quant_tables[1][3][i]=   5*11*11*quant5_10bit[i];

  1057.             s->quant_tables[1][4][i]= 5*5*11*11*quant5_10bit[i];

  1058.         }

  1059.     }

  1060.     s->context_count[0]= (11*11*11+1)/2;

  1061.     s->context_count[1]= (11*11*5*5*5+1)/2;

  1062.     memcpy(s->quant_table, s->quant_tables[avctx->context_model], sizeof(s->quant_table));

  1063. 

  1064.     for(i=0; i<s->plane_count; i++){

  1065.         PlaneContext * const p= &s->plane[i];

  1066. 

  1067.         memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));

  1068.         p->quant_table_index= avctx->context_model;

  1069.         p->context_count= s->context_count[p->quant_table_index];

  1070.     }

  1071. 

  1072.     if(allocate_initial_states(s) < 0)

  1073.         return AVERROR(ENOMEM);

  1074. 

  1075.     avctx->coded_frame= &s->picture;

  1076.     if(!s->transparency)

  1077.         s->plane_count= 2;

  1078.     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  1079. 

  1080.     s->picture_number=0;

  1081. 

  1082.     if(avctx->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){

  1083.         for(i=0; i<s->quant_table_count; i++){

  1084.             s->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*s->rc_stat2[i]));

  1085.             if(!s->rc_stat2[i])

  1086.                 return AVERROR(ENOMEM);

  1087.         }

  1088.     }

  1089.     if(avctx->stats_in){

  1090.         char *p= avctx->stats_in;

  1091.         uint8_t best_state[256][256];

  1092.         int gob_count=0;

  1093.         char *next;

  1094. 

  1095.         av_assert0(s->version>=2);

  1096. 

  1097.         for(;;){

  1098.             for(j=0; j<256; j++){

  1099.                 for(i=0; i<2; i++){

  1100.                     s->rc_stat[j][i]= strtol(p, &next, 0);

  1101.                     if(next==p){

  1102.                         av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d [%s]\n", j,i,p);

  1103.                         return -1;

  1104.                     }

  1105.                     p=next;

  1106.                 }

  1107.             }

  1108.             for(i=0; i<s->quant_table_count; i++){

  1109.                 for(j=0; j<s->context_count[i]; j++){

  1110.                     for(k=0; k<32; k++){

  1111.                         for(m=0; m<2; m++){

  1112.                             s->rc_stat2[i][j][k][m]= strtol(p, &next, 0);

  1113.                             if(next==p){

  1114.                                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid at %d %d %d %d [%s]\n", i,j,k,m,p);

  1115.                                 return AVERROR_INVALIDDATA;

  1116.                             }

  1117.                             p=next;

  1118.                         }

  1119.                     }

  1120.                 }

  1121.             }

  1122.             gob_count= strtol(p, &next, 0);

  1123.             if(next==p || gob_count <0){

  1124.                 av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");

  1125.                 return AVERROR_INVALIDDATA;

  1126.             }

  1127.             p=next;

  1128.             while(*p=='\n' || *p==' ') p++;

  1129.             if(p[0]==0) break;

  1130.         }

  1131.         sort_stt(s, s->state_transition);

  1132. 

  1133.         find_best_state(best_state, s->state_transition);

  1134. 

  1135.         for(i=0; i<s->quant_table_count; i++){

  1136.             for(j=0; j<s->context_count[i]; j++){

  1137.                 for(k=0; k<32; k++){

  1138.                     double p= 128;

  1139.                     if(s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]){

  1140.                         p=256.0*s->rc_stat2[i][j][k][1] / (s->rc_stat2[i][j][k][0]+s->rc_stat2[i][j][k][1]);

  1141.                     }

  1142.                     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)];

  1143.                 }

  1144.             }

  1145.         }

  1146.     }

  1147. 

  1148.     if(s->version>1){

  1149.         for(s->num_v_slices=2; s->num_v_slices<9; s->num_v_slices++){

  1150.             for(s->num_h_slices=s->num_v_slices; s->num_h_slices<2*s->num_v_slices; s->num_h_slices++){

  1151.                 if(avctx->slices == s->num_h_slices * s->num_v_slices && avctx->slices <= 64 || !avctx->slices)

  1152.                     goto slices_ok;

  1153.             }

  1154.         }

  1155.         av_log(avctx, AV_LOG_ERROR, "Unsupported number %d of slices requested, please specify a supported number with -slices (ex:4,6,9,12,16, ...)\n", avctx->slices);

  1156.         return -1;

  1157.         slices_ok:

  1158.         write_extra_header(s);

  1159.     }

  1160. 

  1161.     if(init_slice_contexts(s) < 0)

  1162.         return -1;

  1163.     if(init_slices_state(s) < 0)

  1164.         return -1;

  1165. 

  1166. #define STATS_OUT_SIZE 1024*1024*6

  1167.     if(avctx->flags & CODEC_FLAG_PASS1){

  1168.         avctx->stats_out= av_mallocz(STATS_OUT_SIZE);

  1169.         for(i=0; i<s->quant_table_count; i++){

  1170.             for(j=0; j<s->slice_count; j++){

  1171.                 FFV1Context *sf= s->slice_context[j];

  1172.                 av_assert0(!sf->rc_stat2[i]);

  1173.                 sf->rc_stat2[i]= av_mallocz(s->context_count[i]*sizeof(*sf->rc_stat2[i]));

  1174.                 if(!sf->rc_stat2[i])

  1175.                     return AVERROR(ENOMEM);

  1176.             }

  1177.         }

  1178.     }

  1179. 

  1180.     return 0;

  1181. }

  1182. #endif /* CONFIG_FFV1_ENCODER */

  1183. 

  1184. 

  1185. static void clear_slice_state(FFV1Context *f, FFV1Context *fs){

  1186.     int i, j;

  1187. 

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

  1189.             PlaneContext *p= &fs->plane[i];

  1190. 

  1191.             p->interlace_bit_state[0]= 128;

  1192.             p->interlace_bit_state[1]= 128;

  1193. 

  1194.             if(fs->ac){

  1195.                 if(f->initial_states[p->quant_table_index]){

  1196.                     memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);

  1197.                 }else

  1198.                 memset(p->state, 128, CONTEXT_SIZE*p->context_count);

  1199.             }else{

  1200.                 for(j=0; j<p->context_count; j++){

  1201.                     p->vlc_state[j].drift= 0;

  1202.                     p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);

  1203.                     p->vlc_state[j].bias= 0;

  1204.                     p->vlc_state[j].count= 1;

  1205.                 }

  1206.             }

  1207.         }

  1208. }

  1209. 

  1210. #if CONFIG_FFV1_ENCODER

  1211. 

  1212. static void encode_slice_header(FFV1Context *f, FFV1Context *fs){

  1213.     RangeCoder *c = &fs->c;

  1214.     uint8_t state[CONTEXT_SIZE];

  1215.     int j;

  1216.     memset(state, 128, sizeof(state));

  1217. 

  1218.     put_symbol(c, state, (fs->slice_x     +1)*f->num_h_slices / f->width   , 0);

  1219.     put_symbol(c, state, (fs->slice_y     +1)*f->num_v_slices / f->height  , 0);

  1220.     put_symbol(c, state, (fs->slice_width +1)*f->num_h_slices / f->width -1, 0);

  1221.     put_symbol(c, state, (fs->slice_height+1)*f->num_v_slices / f->height-1, 0);

  1222.     for(j=0; j<f->plane_count; j++){

  1223.         put_symbol(c, state, f->plane[j].quant_table_index, 0);

  1224.         av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);

  1225.     }

  1226.     if(!f->picture.interlaced_frame) put_symbol(c, state, 3, 0);

  1227.     else                             put_symbol(c, state, 1 + !f->picture.top_field_first, 0);

  1228.     put_symbol(c, state, f->picture.sample_aspect_ratio.num, 0);

  1229.     put_symbol(c, state, f->picture.sample_aspect_ratio.den, 0);

  1230. }

  1231. 

  1232. static int encode_slice(AVCodecContext *c, void *arg){

  1233.     FFV1Context *fs= *(void**)arg;

  1234.     FFV1Context *f= fs->avctx->priv_data;

  1235.     int width = fs->slice_width;

  1236.     int height= fs->slice_height;

  1237.     int x= fs->slice_x;

  1238.     int y= fs->slice_y;

  1239.     AVFrame * const p= &f->picture;

  1240.     const int ps= (f->bits_per_raw_sample>8)+1;

  1241. 

  1242.     if(p->key_frame)

  1243.         clear_slice_state(f, fs);

  1244.     if(f->version > 2){

  1245.         encode_slice_header(f, fs);

  1246.     }

  1247.     if(!fs->ac){

  1248.         if(f->version > 2)

  1249.             put_rac(&fs->c, (uint8_t[]){129}, 0);

  1250.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? ff_rac_terminate(&fs->c) : 0;

  1251.         init_put_bits(&fs->pb, fs->c.bytestream_start + fs->ac_byte_count, fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  1252.     }

  1253. 

  1254.     if(f->colorspace==0){

  1255.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1256.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1257.         const int cx= x>>f->chroma_h_shift;

  1258.         const int cy= y>>f->chroma_v_shift;

  1259. 

  1260.         encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1261. 

  1262.         if (f->chroma_planes){

  1263.             encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1264.             encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1265.         }

  1266.         if (fs->transparency)

  1267.             encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1268.     }else{

  1269.         uint8_t *planes[3] = {p->data[0] + ps*x + y*p->linesize[0],

  1270.                               p->data[1] + ps*x + y*p->linesize[1],

  1271.                               p->data[2] + ps*x + y*p->linesize[2]};

  1272.         encode_rgb_frame(fs, planes, width, height, p->linesize);

  1273.     }

  1274.     emms_c();

  1275. 

  1276.     return 0;

  1277. }

  1278. 

  1279. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1280.                         const AVFrame *pict, int *got_packet)

  1281. {

  1282.     FFV1Context *f = avctx->priv_data;

  1283.     RangeCoder * const c= &f->slice_context[0]->c;

  1284.     AVFrame * const p= &f->picture;

  1285.     int used_count= 0;

  1286.     uint8_t keystate=128;

  1287.     uint8_t *buf_p;

  1288.     int i, ret;

  1289. 

  1290.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1291.                                   + FF_MIN_BUFFER_SIZE)) < 0)

  1292.         return ret;

  1293. 

  1294.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1295.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1296. 

  1297.     *p = *pict;

  1298.     p->pict_type= AV_PICTURE_TYPE_I;

  1299. 

  1300.     if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){

  1301.         put_rac(c, &keystate, 1);

  1302.         p->key_frame= 1;

  1303.         f->gob_count++;

  1304.         write_header(f);

  1305.     }else{

  1306.         put_rac(c, &keystate, 0);

  1307.         p->key_frame= 0;

  1308.     }

  1309. 

  1310.     if (f->ac>1){

  1311.         int i;

  1312.         for(i=1; i<256; i++){

  1313.             c->one_state[i]= f->state_transition[i];

  1314.             c->zero_state[256-i]= 256-c->one_state[i];

  1315.         }

  1316.     }

  1317. 

  1318.     for(i=1; i<f->slice_count; i++){

  1319.         FFV1Context *fs= f->slice_context[i];

  1320.         uint8_t *start = pkt->data + (pkt->size-used_count)*(int64_t)i/f->slice_count;

  1321.         int len = pkt->size/f->slice_count;

  1322.         ff_init_range_encoder(&fs->c, start, len);

  1323.     }

  1324.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  1325. 

  1326.     buf_p = pkt->data;

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

  1328.         FFV1Context *fs= f->slice_context[i];

  1329.         int bytes;

  1330. 

  1331.         if(fs->ac){

  1332.             uint8_t state=129;

  1333.             put_rac(&fs->c, &state, 0);

  1334.             bytes= ff_rac_terminate(&fs->c);

  1335.         }else{

  1336.             flush_put_bits(&fs->pb); //nicer padding FIXME

  1337.             bytes= fs->ac_byte_count + (put_bits_count(&fs->pb)+7)/8;

  1338.         }

  1339.         if(i>0 || f->version>2){

  1340.             av_assert0(bytes < pkt->size/f->slice_count);

  1341.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1342.             av_assert0(bytes < (1<<24));

  1343.             AV_WB24(buf_p+bytes, bytes);

  1344.             bytes+=3;

  1345.         }

  1346.         if(f->ec){

  1347.             unsigned v;

  1348.             buf_p[bytes++] = 0;

  1349.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1350.             AV_WL32(buf_p + bytes, v); bytes += 4;

  1351.         }

  1352.         buf_p += bytes;

  1353.     }

  1354. 

  1355.     if((avctx->flags&CODEC_FLAG_PASS1) && (f->picture_number&31)==0){

  1356.         int j, k, m;

  1357.         char *p= avctx->stats_out;

  1358.         char *end= p + STATS_OUT_SIZE;

  1359. 

  1360.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1361.         for(i=0; i<f->quant_table_count; i++)

  1362.             memset(f->rc_stat2[i], 0, f->context_count[i]*sizeof(*f->rc_stat2[i]));

  1363. 

  1364.         for(j=0; j<f->slice_count; j++){

  1365.             FFV1Context *fs= f->slice_context[j];

  1366.             for(i=0; i<256; i++){

  1367.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1368.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1369.             }

  1370.             for(i=0; i<f->quant_table_count; i++){

  1371.                 for(k=0; k<f->context_count[i]; k++){

  1372.                     for(m=0; m<32; m++){

  1373.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1374.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1375.                     }

  1376.                 }

  1377.             }

  1378.         }

  1379. 

  1380.         for(j=0; j<256; j++){

  1381.             snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat[j][0], f->rc_stat[j][1]);

  1382.             p+= strlen(p);

  1383.         }

  1384.         snprintf(p, end-p, "\n");

  1385. 

  1386.         for(i=0; i<f->quant_table_count; i++){

  1387.             for(j=0; j<f->context_count[i]; j++){

  1388.                 for(m=0; m<32; m++){

  1389.                     snprintf(p, end-p, "%"PRIu64" %"PRIu64" ", f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1390.                     p+= strlen(p);

  1391.                 }

  1392.             }

  1393.         }

  1394.         snprintf(p, end-p, "%d\n", f->gob_count);

  1395.     } else if(avctx->flags&CODEC_FLAG_PASS1)

  1396.         avctx->stats_out[0] = '\0';

  1397. 

  1398.     f->picture_number++;

  1399.     pkt->size   = buf_p - pkt->data;

  1400.     pkt->flags |= AV_PKT_FLAG_KEY*p->key_frame;

  1401.     *got_packet = 1;

  1402. 

  1403.     return 0;

  1404. }

  1405. #endif /* CONFIG_FFV1_ENCODER */

  1406. 

  1407. static av_cold int common_end(AVCodecContext *avctx){

  1408.     FFV1Context *s = avctx->priv_data;

  1409.     int i, j;

  1410. 

  1411.     if (avctx->codec->decode && s->picture.data[0])

  1412.         avctx->release_buffer(avctx, &s->picture);

  1413.     if (avctx->codec->decode && s->last_picture.data[0])

  1414.         avctx->release_buffer(avctx, &s->last_picture);

  1415. 

  1416.     for(j=0; j<s->slice_count; j++){

  1417.         FFV1Context *fs= s->slice_context[j];

  1418.         for(i=0; i<s->plane_count; i++){

  1419.             PlaneContext *p= &fs->plane[i];

  1420. 

  1421.             av_freep(&p->state);

  1422.             av_freep(&p->vlc_state);

  1423.         }

  1424.         av_freep(&fs->sample_buffer);

  1425.     }

  1426. 

  1427.     av_freep(&avctx->stats_out);

  1428.     for(j=0; j<s->quant_table_count; j++){

  1429.         av_freep(&s->initial_states[j]);

  1430.         for(i=0; i<s->slice_count; i++){

  1431.             FFV1Context *sf= s->slice_context[i];

  1432.             av_freep(&sf->rc_stat2[j]);

  1433.         }

  1434.         av_freep(&s->rc_stat2[j]);

  1435.     }

  1436. 

  1437.     for(i=0; i<s->slice_count; i++){

  1438.         av_freep(&s->slice_context[i]);

  1439.     }

  1440. 

  1441.     return 0;

  1442. }

  1443. 

  1444. static av_always_inline void decode_line(FFV1Context *s, int w,

  1445.                                          int16_t *sample[2],

  1446.                                          int plane_index, int bits)

  1447. {

  1448.     PlaneContext * const p= &s->plane[plane_index];

  1449.     RangeCoder * const c= &s->c;

  1450.     int x;

  1451.     int run_count=0;

  1452.     int run_mode=0;

  1453.     int run_index= s->run_index;

  1454. 

  1455.     for(x=0; x<w; x++){

  1456.         int diff, context, sign;

  1457. 

  1458.         context= get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);

  1459.         if(context < 0){

  1460.             context= -context;

  1461.             sign=1;

  1462.         }else

  1463.             sign=0;

  1464. 

  1465.         av_assert2(context < p->context_count);

  1466. 

  1467.         if(s->ac){

  1468.             diff= get_symbol_inline(c, p->state[context], 1);

  1469.         }else{

  1470.             if(context == 0 && run_mode==0) run_mode=1;

  1471. 

  1472.             if(run_mode){

  1473.                 if(run_count==0 && run_mode==1){

  1474.                     if(get_bits1(&s->gb)){

  1475.                         run_count = 1<<ff_log2_run[run_index];

  1476.                         if(x + run_count <= w) run_index++;

  1477.                     }else{

  1478.                         if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_log2_run[run_index]);

  1479.                         else run_count=0;

  1480.                         if(run_index) run_index--;

  1481.                         run_mode=2;

  1482.                     }

  1483.                 }

  1484.                 run_count--;

  1485.                 if(run_count < 0){

  1486.                     run_mode=0;

  1487.                     run_count=0;

  1488.                     diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1489.                     if(diff>=0) diff++;

  1490.                 }else

  1491.                     diff=0;

  1492.             }else

  1493.                 diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);

  1494. 

  1495.             av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",

  1496.                     run_count, run_index, run_mode, x, get_bits_count(&s->gb));

  1497.         }

  1498. 

  1499.         if(sign) diff= -diff;

  1500. 

  1501.         sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);

  1502.     }

  1503.     s->run_index= run_index;

  1504. }

  1505. 

  1506. static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){

  1507.     int x, y;

  1508.     int16_t *sample[2];

  1509.     sample[0]=s->sample_buffer    +3;

  1510.     sample[1]=s->sample_buffer+w+6+3;

  1511. 

  1512.     s->run_index=0;

  1513. 

  1514.     memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));

  1515. 

  1516.     for(y=0; y<h; y++){

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

  1518. 

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

  1520.         sample[1]= temp;

  1521. 

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

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

  1524. 

  1525. //{START_TIMER

  1526.         if(s->avctx->bits_per_raw_sample <= 8){

  1527.             decode_line(s, w, sample, plane_index, 8);

  1528.             for(x=0; x<w; x++){

  1529.                 src[x + stride*y]= sample[1][x];

  1530.             }

  1531.         }else{

  1532.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  1533.             if(s->packed_at_lsb){

  1534.                 for(x=0; x<w; x++){

  1535.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x];

  1536.                 }

  1537.             }else{

  1538.                 for(x=0; x<w; x++){

  1539.                     ((uint16_t*)(src + stride*y))[x]= sample[1][x] << (16 - s->avctx->bits_per_raw_sample);

  1540.                 }

  1541.             }

  1542.         }

  1543. //STOP_TIMER("decode-line")}

  1544.     }

  1545. }

  1546. 

  1547. static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3]){

  1548.     int x, y, p;

  1549.     int16_t *sample[4][2];

  1550.     int lbd=  s->avctx->bits_per_raw_sample <= 8;

  1551.     int bits= s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;

  1552.     int offset= 1 << bits;

  1553.     for(x=0; x<4; x++){

  1554.         sample[x][0] = s->sample_buffer +  x*2   *(w+6) + 3;

  1555.         sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;

  1556.     }

  1557. 

  1558.     s->run_index=0;

  1559. 

  1560.     memset(s->sample_buffer, 0, 8*(w+6)*sizeof(*s->sample_buffer));

  1561. 

  1562.     for(y=0; y<h; y++){

  1563.         for(p=0; p<3 + s->transparency; p++){

  1564.             int16_t *temp = sample[p][0]; //FIXME try a normal buffer

  1565. 

  1566.             sample[p][0]= sample[p][1];

  1567.             sample[p][1]= temp;

  1568. 

  1569.             sample[p][1][-1]= sample[p][0][0  ];

  1570.             sample[p][0][ w]= sample[p][0][w-1];

  1571.             if (lbd)

  1572.                 decode_line(s, w, sample[p], (p+1)/2, 9);

  1573.             else

  1574.                 decode_line(s, w, sample[p], (p+1)/2, bits+1);

  1575.         }

  1576.         for(x=0; x<w; x++){

  1577.             int g= sample[0][1][x];

  1578.             int b= sample[1][1][x];

  1579.             int r= sample[2][1][x];

  1580.             int a= sample[3][1][x];

  1581. 

  1582.             b -= offset;

  1583.             r -= offset;

  1584.             g -= (b + r)>>2;

  1585.             b += g;

  1586.             r += g;

  1587. 

  1588.             if(lbd)

  1589.                 *((uint32_t*)(src[0] + x*4 + stride[0]*y))= b + (g<<8) + (r<<16) + (a<<24);

  1590.             else{

  1591.                 *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;

  1592.                 *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;

  1593.                 *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;

  1594.             }

  1595.         }

  1596.     }

  1597. }

  1598. 

  1599. static int decode_slice_header(FFV1Context *f, FFV1Context *fs){

  1600.     RangeCoder *c = &fs->c;

  1601.     uint8_t state[CONTEXT_SIZE];

  1602.     unsigned ps, i, context_count;

  1603.     memset(state, 128, sizeof(state));

  1604. 

  1605.     av_assert0(f->version > 2);

  1606. 

  1607.     fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1608.     fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1609.     fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1610.     fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1611. 

  1612.     fs->slice_x /= f->num_h_slices;

  1613.     fs->slice_y /= f->num_v_slices;

  1614.     fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1615.     fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1616.     if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1617.         return -1;

  1618.     if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1619.         || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1620.         return -1;

  1621. 

  1622.     for(i=0; i<f->plane_count; i++){

  1623.         PlaneContext * const p= &fs->plane[i];

  1624.         int idx=get_symbol(c, state, 0);

  1625.         if(idx > (unsigned)f->quant_table_count){

  1626.             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  1627.             return -1;

  1628.         }

  1629.         p->quant_table_index= idx;

  1630.         memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  1631.         context_count= f->context_count[idx];

  1632. 

  1633.         if(p->context_count < context_count){

  1634.             av_freep(&p->state);

  1635.             av_freep(&p->vlc_state);

  1636.         }

  1637.         p->context_count= context_count;

  1638.     }

  1639. 

  1640.     ps = get_symbol(c, state, 0);

  1641.     if(ps==1){

  1642.         f->picture.interlaced_frame = 1;

  1643.         f->picture.top_field_first  = 1;

  1644.     } else if(ps==2){

  1645.         f->picture.interlaced_frame = 1;

  1646.         f->picture.top_field_first  = 0;

  1647.     } else if(ps==3){

  1648.         f->picture.interlaced_frame = 0;

  1649.     }

  1650.     f->picture.sample_aspect_ratio.num = get_symbol(c, state, 0);

  1651.     f->picture.sample_aspect_ratio.den = get_symbol(c, state, 0);

  1652. 

  1653.     return 0;

  1654. }

  1655. 

  1656. static int decode_slice(AVCodecContext *c, void *arg){

  1657.     FFV1Context *fs= *(void**)arg;

  1658.     FFV1Context *f= fs->avctx->priv_data;

  1659.     int width, height, x, y;

  1660.     const int ps= (c->bits_per_raw_sample>8)+1;

  1661.     AVFrame * const p= &f->picture;

  1662. 

  1663.     if(f->version > 2){

  1664.         if(init_slice_state(f, fs) < 0)

  1665.             return AVERROR(ENOMEM);

  1666.         if(decode_slice_header(f, fs) < 0) {

  1667.             fs->slice_damaged = 1;

  1668.             return AVERROR_INVALIDDATA;

  1669.         }

  1670.     }

  1671.     if(init_slice_state(f, fs) < 0)

  1672.         return AVERROR(ENOMEM);

  1673.     if(f->picture.key_frame)

  1674.         clear_slice_state(f, fs);

  1675.     width = fs->slice_width;

  1676.     height= fs->slice_height;

  1677.     x= fs->slice_x;

  1678.     y= fs->slice_y;

  1679. 

  1680.     if(!fs->ac){

  1681.         if (f->version == 3 && f->minor_version > 1 || f->version > 3)

  1682.             get_rac(&fs->c, (uint8_t[]){129});

  1683.         fs->ac_byte_count = f->version > 2 || (!x&&!y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;

  1684.         init_get_bits(&fs->gb,

  1685.                       fs->c.bytestream_start + fs->ac_byte_count,

  1686.                       (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);

  1687.     }

  1688. 

  1689.     av_assert1(width && height);

  1690.     if(f->colorspace==0){

  1691.         const int chroma_width = -((-width )>>f->chroma_h_shift);

  1692.         const int chroma_height= -((-height)>>f->chroma_v_shift);

  1693.         const int cx= x>>f->chroma_h_shift;

  1694.         const int cy= y>>f->chroma_v_shift;

  1695.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);

  1696. 

  1697.         if (f->chroma_planes){

  1698.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);

  1699.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);

  1700.         }

  1701.         if (fs->transparency)

  1702.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);

  1703.     }else{

  1704.         uint8_t *planes[3] = {p->data[0] + ps*x + y*p->linesize[0],

  1705.                               p->data[1] + ps*x + y*p->linesize[1],

  1706.                               p->data[2] + ps*x + y*p->linesize[2]};

  1707.         decode_rgb_frame(fs, planes, width, height, p->linesize);

  1708.     }

  1709.     if(fs->ac && f->version > 2) {

  1710.         int v;

  1711.         get_rac(&fs->c, (uint8_t[]){129});

  1712.         v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;

  1713.         if(v) {

  1714.             av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);

  1715.             fs->slice_damaged = 1;

  1716.         }

  1717.     }

  1718. 

  1719.     emms_c();

  1720. 

  1721.     return 0;

  1722. }

  1723. 

  1724. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){

  1725.     int v;

  1726.     int i=0;

  1727.     uint8_t state[CONTEXT_SIZE];

  1728. 

  1729.     memset(state, 128, sizeof(state));

  1730. 

  1731.     for(v=0; i<128 ; v++){

  1732.         unsigned len= get_symbol(c, state, 0) + 1;

  1733. 

  1734.         if(len > 128 - i) return -1;

  1735. 

  1736.         while(len--){

  1737.             quant_table[i] = scale*v;

  1738.             i++;

  1739.         }

  1740.     }

  1741. 

  1742.     for(i=1; i<128; i++){

  1743.         quant_table[256-i]= -quant_table[i];

  1744.     }

  1745.     quant_table[128]= -quant_table[127];

  1746. 

  1747.     return 2*v - 1;

  1748. }

  1749. 

  1750. static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256]){

  1751.     int i;

  1752.     int context_count=1;

  1753. 

  1754.     for(i=0; i<5; i++){

  1755.         context_count*= read_quant_table(c, quant_table[i], context_count);

  1756.         if(context_count > 32768U){

  1757.             return -1;

  1758.         }

  1759.     }

  1760.     return (context_count+1)/2;

  1761. }

  1762. 

  1763. static int read_extra_header(FFV1Context *f){

  1764.     RangeCoder * const c= &f->c;

  1765.     uint8_t state[CONTEXT_SIZE];

  1766.     int i, j, k;

  1767.     uint8_t state2[32][CONTEXT_SIZE];

  1768. 

  1769.     memset(state2, 128, sizeof(state2));

  1770.     memset(state, 128, sizeof(state));

  1771. 

  1772.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  1773.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  1774. 

  1775.     f->version= get_symbol(c, state, 0);

  1776.     if(f->version > 2) {

  1777.         c->bytestream_end -= 4;

  1778.         f->minor_version= get_symbol(c, state, 0);

  1779.     }

  1780.     f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1781.     if(f->ac>1){

  1782.         for(i=1; i<256; i++){

  1783.             f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1784.         }

  1785.     }

  1786.     f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1787.     f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1788.     f->chroma_planes= get_rac(c, state);

  1789.     f->chroma_h_shift= get_symbol(c, state, 0);

  1790.     f->chroma_v_shift= get_symbol(c, state, 0);

  1791.     f->transparency= get_rac(c, state);

  1792.     f->plane_count= 2 + f->transparency;

  1793.     f->num_h_slices= 1 + get_symbol(c, state, 0);

  1794.     f->num_v_slices= 1 + get_symbol(c, state, 0);

  1795.     if(f->num_h_slices > (unsigned)f->width || f->num_v_slices > (unsigned)f->height){

  1796.         av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");

  1797.         return -1;

  1798.     }

  1799. 

  1800.     f->quant_table_count= get_symbol(c, state, 0);

  1801.     if(f->quant_table_count > (unsigned)MAX_QUANT_TABLES)

  1802.         return -1;

  1803.     for(i=0; i<f->quant_table_count; i++){

  1804.         if((f->context_count[i]= read_quant_tables(c, f->quant_tables[i])) < 0){

  1805.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1806.             return -1;

  1807.         }

  1808.     }

  1809. 

  1810.     if(allocate_initial_states(f) < 0)

  1811.         return AVERROR(ENOMEM);

  1812. 

  1813.     for(i=0; i<f->quant_table_count; i++){

  1814.         if(get_rac(c, state)){

  1815.             for(j=0; j<f->context_count[i]; j++){

  1816.                 for(k=0; k<CONTEXT_SIZE; k++){

  1817.                     int pred= j ? f->initial_states[i][j-1][k] : 128;

  1818.                     f->initial_states[i][j][k]= (pred+get_symbol(c, state2[k], 1))&0xFF;

  1819.                 }

  1820.             }

  1821.         }

  1822.     }

  1823. 

  1824.     if(f->version > 2){

  1825.         f->ec = get_symbol(c, state, 0);

  1826.     }

  1827. 

  1828.     if(f->version > 2){

  1829.         unsigned v;

  1830.         v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, f->avctx->extradata, f->avctx->extradata_size);

  1831.         if(v){

  1832.             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);

  1833.             return AVERROR_INVALIDDATA;

  1834.         }

  1835.     }

  1836. 

  1837.     return 0;

  1838. }

  1839. 

  1840. static int read_header(FFV1Context *f){

  1841.     uint8_t state[CONTEXT_SIZE];

  1842.     int i, j, context_count = -1; //-1 to avoid warning

  1843.     RangeCoder * const c= &f->slice_context[0]->c;

  1844. 

  1845.     memset(state, 128, sizeof(state));

  1846. 

  1847.     if(f->version < 2){

  1848.         unsigned v= get_symbol(c, state, 0);

  1849.         if(v >= 2){

  1850.             av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);

  1851.             return AVERROR_INVALIDDATA;

  1852.         }

  1853.         f->version = v;

  1854.         f->ac= f->avctx->coder_type= get_symbol(c, state, 0);

  1855.         if(f->ac>1){

  1856.             for(i=1; i<256; i++){

  1857.                 f->state_transition[i]= get_symbol(c, state, 1) + c->one_state[i];

  1858.             }

  1859.         }

  1860.         f->colorspace= get_symbol(c, state, 0); //YUV cs type

  1861.         if(f->version>0)

  1862.             f->avctx->bits_per_raw_sample= get_symbol(c, state, 0);

  1863.         f->chroma_planes= get_rac(c, state);

  1864.         f->chroma_h_shift= get_symbol(c, state, 0);

  1865.         f->chroma_v_shift= get_symbol(c, state, 0);

  1866.         f->transparency= get_rac(c, state);

  1867.         f->plane_count= 2 + f->transparency;

  1868.     }

  1869. 

  1870.     if(f->colorspace==0){

  1871.         if(!f->transparency && !f->chroma_planes){

  1872.             if (f->avctx->bits_per_raw_sample<=8)

  1873.                 f->avctx->pix_fmt= AV_PIX_FMT_GRAY8;

  1874.             else

  1875.                 f->avctx->pix_fmt= AV_PIX_FMT_GRAY16;

  1876.         }else if(f->avctx->bits_per_raw_sample<=8 && !f->transparency){

  1877.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1878.             case 0x00: f->avctx->pix_fmt= AV_PIX_FMT_YUV444P; break;

  1879.             case 0x01: f->avctx->pix_fmt= AV_PIX_FMT_YUV440P; break;

  1880.             case 0x10: f->avctx->pix_fmt= AV_PIX_FMT_YUV422P; break;

  1881.             case 0x11: f->avctx->pix_fmt= AV_PIX_FMT_YUV420P; break;

  1882.             case 0x20: f->avctx->pix_fmt= AV_PIX_FMT_YUV411P; break;

  1883.             case 0x22: f->avctx->pix_fmt= AV_PIX_FMT_YUV410P; break;

  1884.             default:

  1885.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1886.                 return -1;

  1887.             }

  1888.         }else if(f->avctx->bits_per_raw_sample<=8 && f->transparency){

  1889.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1890.             case 0x00: f->avctx->pix_fmt= AV_PIX_FMT_YUVA444P; break;

  1891.             case 0x10: f->avctx->pix_fmt= AV_PIX_FMT_YUVA422P; break;

  1892.             case 0x11: f->avctx->pix_fmt= AV_PIX_FMT_YUVA420P; break;

  1893.             default:

  1894.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1895.                 return -1;

  1896.             }

  1897.         }else if(f->avctx->bits_per_raw_sample==9) {

  1898.             f->packed_at_lsb=1;

  1899.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1900.             case 0x00: f->avctx->pix_fmt= AV_PIX_FMT_YUV444P9; break;

  1901.             case 0x10: f->avctx->pix_fmt= AV_PIX_FMT_YUV422P9; break;

  1902.             case 0x11: f->avctx->pix_fmt= AV_PIX_FMT_YUV420P9; break;

  1903.             default:

  1904.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1905.                 return -1;

  1906.             }

  1907.         }else if(f->avctx->bits_per_raw_sample==10) {

  1908.             f->packed_at_lsb=1;

  1909.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1910.             case 0x00: f->avctx->pix_fmt= AV_PIX_FMT_YUV444P10; break;

  1911.             case 0x10: f->avctx->pix_fmt= AV_PIX_FMT_YUV422P10; break;

  1912.             case 0x11: f->avctx->pix_fmt= AV_PIX_FMT_YUV420P10; break;

  1913.             default:

  1914.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1915.                 return -1;

  1916.             }

  1917.         }else {

  1918.             switch(16*f->chroma_h_shift + f->chroma_v_shift){

  1919.             case 0x00: f->avctx->pix_fmt= AV_PIX_FMT_YUV444P16; break;

  1920.             case 0x10: f->avctx->pix_fmt= AV_PIX_FMT_YUV422P16; break;

  1921.             case 0x11: f->avctx->pix_fmt= AV_PIX_FMT_YUV420P16; break;

  1922.             default:

  1923.                 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  1924.                 return -1;

  1925.             }

  1926.         }

  1927.     }else if(f->colorspace==1){

  1928.         if(f->chroma_h_shift || f->chroma_v_shift){

  1929.             av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");

  1930.             return -1;

  1931.         }

  1932.         if(f->avctx->bits_per_raw_sample==9)

  1933.             f->avctx->pix_fmt= AV_PIX_FMT_GBRP9;

  1934.         else if(f->avctx->bits_per_raw_sample==10)

  1935.             f->avctx->pix_fmt= AV_PIX_FMT_GBRP10;

  1936.         else if(f->avctx->bits_per_raw_sample==12)

  1937.             f->avctx->pix_fmt= AV_PIX_FMT_GBRP12;

  1938.         else if(f->avctx->bits_per_raw_sample==14)

  1939.             f->avctx->pix_fmt= AV_PIX_FMT_GBRP14;

  1940.         else

  1941.         if(f->transparency) f->avctx->pix_fmt= AV_PIX_FMT_RGB32;

  1942.         else                f->avctx->pix_fmt= AV_PIX_FMT_0RGB32;

  1943.     }else{

  1944.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  1945.         return -1;

  1946.     }

  1947. 

  1948.     av_dlog(f->avctx, "%d %d %d\n",

  1949.             f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);

  1950.     if(f->version < 2){

  1951.         context_count= read_quant_tables(c, f->quant_table);

  1952.         if(context_count < 0){

  1953.                 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  1954.                 return -1;

  1955.         }

  1956.     }else if(f->version < 3){

  1957.         f->slice_count= get_symbol(c, state, 0);

  1958.     }else{

  1959.         const uint8_t *p= c->bytestream_end;

  1960.         for(f->slice_count = 0; f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start; f->slice_count++){

  1961.             int trailer = 3 + 5*!!f->ec;

  1962.             int size = AV_RB24(p-trailer);

  1963.             if(size + trailer > p - c->bytestream_start)

  1964.                 break;

  1965.             p -= size + trailer;

  1966.         }

  1967.     }

  1968.     if(f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0){

  1969.         av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->slice_count);

  1970.         return -1;

  1971.     }

  1972. 

  1973.     for(j=0; j<f->slice_count; j++){

  1974.         FFV1Context *fs= f->slice_context[j];

  1975.         fs->ac= f->ac;

  1976.         fs->packed_at_lsb= f->packed_at_lsb;

  1977. 

  1978.         fs->slice_damaged = 0;

  1979. 

  1980.         if(f->version == 2){

  1981.             fs->slice_x     = get_symbol(c, state, 0)   *f->width ;

  1982.             fs->slice_y     = get_symbol(c, state, 0)   *f->height;

  1983.             fs->slice_width =(get_symbol(c, state, 0)+1)*f->width  + fs->slice_x;

  1984.             fs->slice_height=(get_symbol(c, state, 0)+1)*f->height + fs->slice_y;

  1985. 

  1986.             fs->slice_x /= f->num_h_slices;

  1987.             fs->slice_y /= f->num_v_slices;

  1988.             fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  1989.             fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  1990.             if((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  1991.                 return -1;

  1992.             if(    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  1993.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  1994.                 return -1;

  1995.         }

  1996. 

  1997.         for(i=0; i<f->plane_count; i++){

  1998.             PlaneContext * const p= &fs->plane[i];

  1999. 

  2000.             if(f->version == 2){

  2001.                 int idx=get_symbol(c, state, 0);

  2002.                 if(idx > (unsigned)f->quant_table_count){

  2003.                     av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  2004.                     return -1;

  2005.                 }

  2006.                 p->quant_table_index= idx;

  2007.                 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  2008.                 context_count= f->context_count[idx];

  2009.             }else{

  2010.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  2011.             }

  2012. 

  2013.             if(f->version <= 2){

  2014.                 av_assert0(context_count>=0);

  2015.                 if(p->context_count < context_count){

  2016.                     av_freep(&p->state);

  2017.                     av_freep(&p->vlc_state);

  2018.                 }

  2019.                 p->context_count= context_count;

  2020.             }

  2021.         }

  2022.     }

  2023.     return 0;

  2024. }

  2025. 

  2026. static av_cold int decode_init(AVCodecContext *avctx)

  2027. {

  2028.     FFV1Context *f = avctx->priv_data;

  2029. 

  2030.     common_init(avctx);

  2031. 

  2032.     if(avctx->extradata && read_extra_header(f) < 0)

  2033.         return -1;

  2034. 

  2035.     if(init_slice_contexts(f) < 0)

  2036.         return -1;

  2037. 

  2038.     return 0;

  2039. }

  2040. 

  2041. static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){

  2042.     const uint8_t *buf = avpkt->data;

  2043.     int buf_size = avpkt->size;

  2044.     FFV1Context *f = avctx->priv_data;

  2045.     RangeCoder * const c= &f->slice_context[0]->c;

  2046.     AVFrame * const p= &f->picture;

  2047.     int i;

  2048.     uint8_t keystate= 128;

  2049.     const uint8_t *buf_p;

  2050. 

  2051.     AVFrame *picture = data;

  2052. 

  2053.     /* release previously stored data */

  2054.     if (p->data[0])

  2055.         avctx->release_buffer(avctx, p);

  2056. 

  2057.     ff_init_range_decoder(c, buf, buf_size);

  2058.     ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

  2059. 

  2060. 

  2061.     p->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

  2062.     if(get_rac(c, &keystate)){

  2063.         p->key_frame= 1;

  2064.         f->key_frame_ok = 0;

  2065.         if(read_header(f) < 0)

  2066.             return -1;

  2067.         f->key_frame_ok = 1;

  2068.     }else{

  2069.         if (!f->key_frame_ok) {

  2070.             av_log(avctx, AV_LOG_ERROR, "Cant decode non keyframe without valid keyframe\n");

  2071.             return AVERROR_INVALIDDATA;

  2072.         }

  2073.         p->key_frame= 0;

  2074.     }

  2075. 

  2076.     p->reference= 3; //for error concealment

  2077.     if(avctx->get_buffer(avctx, p) < 0){

  2078.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  2079.         return -1;

  2080.     }

  2081. 

  2082.     if(avctx->debug&FF_DEBUG_PICT_INFO)

  2083.         av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",

  2084.                f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);

  2085. 

  2086.     buf_p= buf + buf_size;

  2087.     for(i=f->slice_count-1; i>=0; i--){

  2088.         FFV1Context *fs= f->slice_context[i];

  2089.         int trailer = 3 + 5*!!f->ec;

  2090.         int v;

  2091. 

  2092.         if(i || f->version>2) v = AV_RB24(buf_p-trailer)+trailer;

  2093.         else                  v = buf_p - c->bytestream_start;

  2094.         if(buf_p - c->bytestream_start < v){

  2095.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  2096.             return -1;

  2097.         }

  2098.         buf_p -= v;

  2099. 

  2100.         if(f->ec){

  2101.             unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);

  2102.             if(crc){

  2103.                 int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;

  2104.                 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);

  2105.                 if(ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {

  2106.                     av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n",ts*av_q2d(avctx->pkt_timebase));

  2107.                 } else if(ts != AV_NOPTS_VALUE) {

  2108.                     av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);

  2109.                 } else {

  2110.                     av_log(f->avctx, AV_LOG_ERROR, "\n");

  2111.                 }

  2112.                 fs->slice_damaged = 1;

  2113.             }

  2114.         }

  2115. 

  2116.         if(i){

  2117.             ff_init_range_decoder(&fs->c, buf_p, v);

  2118.         }else

  2119.             fs->c.bytestream_end = (uint8_t *)(buf_p + v);

  2120.     }

  2121. 

  2122.     avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));

  2123. 

  2124.     for(i=f->slice_count-1; i>=0; i--){

  2125.         FFV1Context *fs= f->slice_context[i];

  2126.         int j;

  2127.         if(fs->slice_damaged && f->last_picture.data[0]){

  2128.             uint8_t *dst[4], *src[4];

  2129.             for(j=0; j<4; j++){

  2130.                 int sh = (j==1 || j==2) ? f->chroma_h_shift : 0;

  2131.                 int sv = (j==1 || j==2) ? f->chroma_v_shift : 0;

  2132.                 dst[j] = f->picture     .data[j] + f->picture     .linesize[j]*

  2133.                          (fs->slice_y>>sv) + (fs->slice_x>>sh);

  2134.                 src[j] = f->last_picture.data[j] + f->last_picture.linesize[j]*

  2135.                          (fs->slice_y>>sv) + (fs->slice_x>>sh);

  2136.             }

  2137.             av_image_copy(dst, f->picture.linesize, (const uint8_t **)src, f->last_picture.linesize,

  2138.                           avctx->pix_fmt, fs->slice_width, fs->slice_height);

  2139.         }

  2140.     }

  2141. 

  2142.     f->picture_number++;

  2143. 

  2144.     *picture= *p;

  2145.     *data_size = sizeof(AVFrame);

  2146. 

  2147.     FFSWAP(AVFrame, f->picture, f->last_picture);

  2148. 

  2149.     return buf_size;

  2150. }

  2151. 

  2152. AVCodec ff_ffv1_decoder = {

  2153.     .name           = "ffv1",

  2154.     .type           = AVMEDIA_TYPE_VIDEO,

  2155.     .id             = AV_CODEC_ID_FFV1,

  2156.     .priv_data_size = sizeof(FFV1Context),

  2157.     .init           = decode_init,

  2158.     .close          = common_end,

  2159.     .decode         = decode_frame,

  2160.     .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |

  2161.                       CODEC_CAP_SLICE_THREADS,

  2162.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2163. };

  2164. 

  2165. #if CONFIG_FFV1_ENCODER

  2166. 

  2167. #define OFFSET(x) offsetof(FFV1Context, x)

  2168. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  2169. static const AVOption options[] = {

  2170.     { "slicecrc",        "Protect slices with CRCs",               OFFSET(ec),              AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE},

  2171. {NULL}

  2172. };

  2173. 

  2174. static const AVClass class = {

  2175.     .class_name = "ffv1 encoder",

  2176.     .item_name  = av_default_item_name,

  2177.     .option     = options,

  2178.     .version    = LIBAVUTIL_VERSION_INT,

  2179. };

  2180. 

  2181. static const AVCodecDefault ffv1_defaults[] = {

  2182.     { "coder",                "-1" },

  2183.     { NULL },

  2184. };

  2185. 

  2186. AVCodec ff_ffv1_encoder = {

  2187.     .name           = "ffv1",

  2188.     .type           = AVMEDIA_TYPE_VIDEO,

  2189.     .id             = AV_CODEC_ID_FFV1,

  2190.     .priv_data_size = sizeof(FFV1Context),

  2191.     .init           = encode_init,

  2192.     .encode2        = encode_frame,

  2193.     .close          = common_end,

  2194.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  2195.     .defaults       = ffv1_defaults,

  2196.     .pix_fmts       = (const enum AVPixelFormat[]){

  2197.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV444P,

  2198.         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV411P,

  2199.         AV_PIX_FMT_YUV410P, AV_PIX_FMT_0RGB32, AV_PIX_FMT_RGB32, AV_PIX_FMT_YUV420P16,

  2200.         AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9,

  2201.         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  2202.         AV_PIX_FMT_GRAY16, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,

  2203.         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,

  2204.         AV_PIX_FMT_NONE

  2205.     },

  2206.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  2207.     .priv_class     = &class,

  2208. };

  2209. #endif