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FFmpeg/libavcodec/ffv1enc.c

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  1. /*

  2.  * FFV1 encoder

  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) encoder

  26.  */

  27. 

  28. #include "libavutil/avassert.h"

  29. #include "libavutil/crc.h"

  30. #include "libavutil/opt.h"

  31. #include "libavutil/imgutils.h"

  32. #include "libavutil/pixdesc.h"

  33. #include "libavutil/timer.h"

  34. #include "avcodec.h"

  35. #include "internal.h"

  36. #include "put_bits.h"

  37. #include "rangecoder.h"

  38. #include "golomb.h"

  39. #include "mathops.h"

  40. #include "ffv1.h"

  41. 

  42. static const int8_t quant5_10bit[256] = {

  43.      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,

  44.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  45.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  46.      1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  47.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  48.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

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

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

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

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

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

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

  55.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1,

  56.     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

  57.     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

  58.     -1, -1, -1, -1, -1, -1, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0,

  59. };

  60. 

  61. static const int8_t quant5[256] = {

  62.      0,  1,  1,  1,  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,  2,

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

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

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

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

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

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

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

  77.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1,

  78. };

  79. 

  80. static const int8_t quant9_10bit[256] = {

  81.      0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  82.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,

  83.      3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,

  84.      3,  3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,  4,  4,  4,  4,

  85.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  86.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

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

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

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

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

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

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

  93.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3,

  94.     -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3,

  95.     -3, -3, -3, -3, -3, -3, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  96.     -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0,

  97. };

  98. 

  99. static const int8_t quant11[256] = {

  100.      0,  1,  2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  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,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  103.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  104.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

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

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

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

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

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

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

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

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

  113.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -4, -4,

  114.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  115.     -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1,

  116. };

  117. 

  118. static const uint8_t ver2_state[256] = {

  119.       0,  10,  10,  10,  10,  16,  16,  16, 28,   16,  16,  29,  42,  49,  20,  49,

  120.      59,  25,  26,  26,  27,  31,  33,  33, 33,   34,  34,  37,  67,  38,  39,  39,

  121.      40,  40,  41,  79,  43,  44,  45,  45, 48,   48,  64,  50,  51,  52,  88,  52,

  122.      53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  123.      87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  124.      85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93,  134, 95,  98,  105, 98,

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

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

  127.     165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  128.     147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  129.     172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  130.     175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  131.     197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  132.     209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  133.     226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  134.     241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  135. };

  136. 

  137. static void find_best_state(uint8_t best_state[256][256],

  138.                             const uint8_t one_state[256])

  139. {

  140.     int i, j, k, m;

  141.     double l2tab[256];

  142. 

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

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

  145. 

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

  147.         double best_len[256];

  148.         double p = i / 256.0;

  149. 

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

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

  152. 

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

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

  155.             double len      = 0;

  156.             occ[j] = 1.0;

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

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

  159.                 for (m = 1; m < 256; m++)

  160.                     if (occ[m]) {

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

  162.                                       + (1-p)*l2tab[256-m]);

  163.                     }

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

  165.                     best_len[k]      = len;

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

  167.                 }

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

  169.                     if (occ[m]) {

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

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

  172.                     }

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

  174.             }

  175.         }

  176.     }

  177. }

  178. 

  179. static av_always_inline av_flatten void put_symbol_inline(RangeCoder *c,

  180.                                                           uint8_t *state, int v,

  181.                                                           int is_signed,

  182.                                                           uint64_t rc_stat[256][2],

  183.                                                           uint64_t rc_stat2[32][2])

  184. {

  185.     int i;

  186. 

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

  188.     do {                                        \

  189.         if (rc_stat) {                          \

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

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

  192.         }                                       \

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

  194.     } while (0)

  195. 

  196.     if (v) {

  197.         const int a = FFABS(v);

  198.         const int e = av_log2(a);

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

  200.         if (e <= 9) {

  201.             for (i = 0; i < e; i++)

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

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

  204. 

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

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

  207. 

  208.             if (is_signed)

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

  210.         } else {

  211.             for (i = 0; i < e; i++)

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

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

  214. 

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

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

  217. 

  218.             if (is_signed)

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

  220.         }

  221.     } else {

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

  223.     }

  224. #undef put_rac

  225. }

  226. 

  227. static av_noinline void put_symbol(RangeCoder *c, uint8_t *state,

  228.                                    int v, int is_signed)

  229. {

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

  231. }

  232. 

  233. 

  234. static inline void put_vlc_symbol(PutBitContext *pb, VlcState *const state,

  235.                                   int v, int bits)

  236. {

  237.     int i, k, code;

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

  239. 

  240.     i = state->count;

  241.     k = 0;

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

  243.         k++;

  244.         i += i;

  245.     }

  246. 

  247.     av_assert2(k <= 13);

  248. 

  249. #if 0 // JPEG LS

  250.     if (k == 0 && 2 * state->drift <= -state->count)

  251.         code = v ^ (-1);

  252.     else

  253.         code = v;

  254. #else

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

  256. #endif

  257. 

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

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

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

  261. 

  262.     update_vlc_state(state, v);

  263. }

  264. 

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

  266.                                         int16_t *sample[3],

  267.                                         int plane_index, int bits)

  268. {

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

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

  271.     int x;

  272.     int run_index = s->run_index;

  273.     int run_count = 0;

  274.     int run_mode  = 0;

  275. 

  276.     if (s->ac) {

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

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

  279.             return AVERROR_INVALIDDATA;

  280.         }

  281.     } else {

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

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

  284.             return AVERROR_INVALIDDATA;

  285.         }

  286.     }

  287. 

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

  289.         int diff, context;

  290. 

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

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

  293. 

  294.         if (context < 0) {

  295.             context = -context;

  296.             diff    = -diff;

  297.         }

  298. 

  299.         diff = fold(diff, bits);

  300. 

  301.         if (s->ac) {

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

  303.                 put_symbol_inline(c, p->state[context], diff, 1, s->rc_stat,

  304.                                   s->rc_stat2[p->quant_table_index][context]);

  305.             } else {

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

  307.             }

  308.         } else {

  309.             if (context == 0)

  310.                 run_mode = 1;

  311. 

  312.             if (run_mode) {

  313.                 if (diff) {

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

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

  316.                         run_index++;

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

  318.                     }

  319. 

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

  321.                     if (run_index)

  322.                         run_index--;

  323.                     run_count = 0;

  324.                     run_mode  = 0;

  325.                     if (diff > 0)

  326.                         diff--;

  327.                 } else {

  328.                     run_count++;

  329.                 }

  330.             }

  331. 

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

  333.                     run_count, run_index, run_mode, x,

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

  335. 

  336.             if (run_mode == 0)

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

  338.         }

  339.     }

  340.     if (run_mode) {

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

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

  343.             run_index++;

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

  345.         }

  346. 

  347.         if (run_count)

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

  349.     }

  350.     s->run_index = run_index;

  351. 

  352.     return 0;

  353. }

  354. 

  355. static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h,

  356.                          int stride, int plane_index)

  357. {

  358.     int x, y, i;

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

  360.     int16_t *sample[3];

  361.     s->run_index = 0;

  362. 

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

  364. 

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

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

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

  368. 

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

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

  371. // { START_TIMER

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

  373.             for (x = 0; x < w; x++)

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

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

  376.         } else {

  377.             if (s->packed_at_lsb) {

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

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

  380.                 }

  381.             } else {

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

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

  384.                 }

  385.             }

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

  387.         }

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

  389.     }

  390. }

  391. 

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

  393. {

  394.     int x, y, p, i;

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

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

  397.     int lbd    = s->bits_per_raw_sample <= 8;

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

  399.     int offset = 1 << bits;

  400. 

  401.     s->run_index = 0;

  402. 

  403.     memset(s->sample_buffer, 0, ring_size * MAX_PLANES *

  404.                                 (w + 6) * sizeof(*s->sample_buffer));

  405. 

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

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

  408.             for (p = 0; p < MAX_PLANES; p++)

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

  410. 

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

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

  413.             if (lbd) {

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

  415.                 b =  v        & 0xFF;

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

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

  418.                 a =  v >> 24;

  419.             } else {

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

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

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

  423.             }

  424. 

  425.             b -= g;

  426.             r -= g;

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

  428.             b += offset;

  429.             r += offset;

  430. 

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

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

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

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

  435.         }

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

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

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

  439.             if (lbd)

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

  441.             else

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

  443.         }

  444.     }

  445. }

  446. 

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

  448. {

  449.     int last = 0;

  450.     int i;

  451.     uint8_t state[CONTEXT_SIZE];

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

  453. 

  454.     for (i = 1; i < 128; i++)

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

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

  457.             last = i;

  458.         }

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

  460. }

  461. 

  462. static void write_quant_tables(RangeCoder *c,

  463.                                int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  464. {

  465.     int i;

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

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

  468. }

  469. 

  470. static void write_header(FFV1Context *f)

  471. {

  472.     uint8_t state[CONTEXT_SIZE];

  473.     int i, j;

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

  475. 

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

  477. 

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

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

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

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

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

  483.                 put_symbol(c, state,

  484.                            f->state_transition[i] - c->one_state[i], 1);

  485.         }

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

  487.         if (f->version > 0)

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

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

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

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

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

  493. 

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

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

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

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

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

  499.             put_symbol(c, state,

  500.                        (fs->slice_x      + 1) * f->num_h_slices / f->width, 0);

  501.             put_symbol(c, state,

  502.                        (fs->slice_y      + 1) * f->num_v_slices / f->height, 0);

  503.             put_symbol(c, state,

  504.                        (fs->slice_width  + 1) * f->num_h_slices / f->width - 1,

  505.                        0);

  506.             put_symbol(c, state,

  507.                        (fs->slice_height + 1) * f->num_v_slices / f->height - 1,

  508.                        0);

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

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

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

  512.             }

  513.         }

  514.     }

  515. }

  516. 

  517. static int write_extradata(FFV1Context *f)

  518. {

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

  520.     uint8_t state[CONTEXT_SIZE];

  521.     int i, j, k;

  522.     uint8_t state2[32][CONTEXT_SIZE];

  523.     unsigned v;

  524. 

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

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

  527. 

  528.     f->avctx->extradata_size = 10000 + 4 +

  529.                                     (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;

  530.     f->avctx->extradata = av_malloc(f->avctx->extradata_size);

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

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

  533. 

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

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

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

  537.             f->minor_version = 3;

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

  539.     }

  540. 

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

  542.     if (f->ac > 1)

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

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

  545. 

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

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

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

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

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

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

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

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

  554. 

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

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

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

  558. 

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

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

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

  562.                 break;

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

  564.             put_rac(c, state, 1);

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

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

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

  568.                     put_symbol(c, state2[k],

  569.                                (int8_t)(f->initial_states[i][j][k] - pred), 1);

  570.                 }

  571.         } else {

  572.             put_rac(c, state, 0);

  573.         }

  574.     }

  575. 

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

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

  578.         put_symbol(c, state, f->intra = (f->avctx->gop_size < 2), 0);

  579.     }

  580. 

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

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

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

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

  585. 

  586.     return 0;

  587. }

  588. 

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

  590. {

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

  592. 

  593.     do {

  594.         changed = 0;

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

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

  597. 

  598. #define COST(old, new)                                      \

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

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

  601. 

  602. #define COST2(old, new)                         \

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

  604. 

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

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

  607.                 if (size0 - sizeX > size0*(1e-14) && i != 128 && i2 != 128) {

  608.                     int j;

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

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

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

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

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

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

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

  616.                     }

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

  618.                         if (stt[j] == i)

  619.                             stt[j] = i2;

  620.                         else if (stt[j] == i2)

  621.                             stt[j] = i;

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

  623.                             if (stt[256 - j] == 256 - i)

  624.                                 stt[256 - j] = 256 - i2;

  625.                             else if (stt[256 - j] == 256 - i2)

  626.                                 stt[256 - j] = 256 - i;

  627.                         }

  628.                     }

  629.                     print = changed = 1;

  630.                 }

  631.             }

  632.         }

  633.     } while (changed);

  634.     return print;

  635. }

  636. 

  637. static av_cold int encode_init(AVCodecContext *avctx)

  638. {

  639.     FFV1Context *s = avctx->priv_data;

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

  641.     int i, j, k, m, ret;

  642. 

  643.     ffv1_common_init(avctx);

  644. 

  645.     s->version = 0;

  646. 

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

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

  649. 

  650.     if (avctx->level == 3 || (s->version==2 && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)) {

  651.         s->version = 3;

  652.     }

  653. 

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

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

  656.     }

  657. 

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

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

  660.         return AVERROR_INVALIDDATA;

  661.     }

  662. 

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

  664. 

  665.     s->plane_count = 3;

  666.     switch(avctx->pix_fmt) {

  667.     case AV_PIX_FMT_YUV444P9:

  668.     case AV_PIX_FMT_YUV422P9:

  669.     case AV_PIX_FMT_YUV420P9:

  670.         if (!avctx->bits_per_raw_sample)

  671.             s->bits_per_raw_sample = 9;

  672.     case AV_PIX_FMT_YUV444P10:

  673.     case AV_PIX_FMT_YUV420P10:

  674.     case AV_PIX_FMT_YUV422P10:

  675.         s->packed_at_lsb = 1;

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

  677.             s->bits_per_raw_sample = 10;

  678.     case AV_PIX_FMT_GRAY16:

  679.     case AV_PIX_FMT_YUV444P16:

  680.     case AV_PIX_FMT_YUV422P16:

  681.     case AV_PIX_FMT_YUV420P16:

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

  683.             s->bits_per_raw_sample = 16;

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

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

  686.         }

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

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

  689.             return AVERROR_INVALIDDATA;

  690.         }

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

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

  693.             s->ac = 2;

  694.         }

  695.         if (!s->ac) {

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

  697.             return AVERROR(ENOSYS);

  698.         }

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

  700.     case AV_PIX_FMT_GRAY8:

  701.     case AV_PIX_FMT_YUV444P:

  702.     case AV_PIX_FMT_YUV440P:

  703.     case AV_PIX_FMT_YUV422P:

  704.     case AV_PIX_FMT_YUV420P:

  705.     case AV_PIX_FMT_YUV411P:

  706.     case AV_PIX_FMT_YUV410P:

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

  708.         s->colorspace = 0;

  709.         break;

  710.     case AV_PIX_FMT_YUVA444P:

  711.     case AV_PIX_FMT_YUVA422P:

  712.     case AV_PIX_FMT_YUVA420P:

  713.         s->chroma_planes = 1;

  714.         s->colorspace = 0;

  715.         s->transparency = 1;

  716.         break;

  717.     case AV_PIX_FMT_RGB32:

  718.         s->colorspace = 1;

  719.         s->transparency = 1;

  720.         break;

  721.     case AV_PIX_FMT_0RGB32:

  722.         s->colorspace = 1;

  723.         break;

  724.     case AV_PIX_FMT_GBRP9:

  725.         if (!avctx->bits_per_raw_sample)

  726.             s->bits_per_raw_sample = 9;

  727.     case AV_PIX_FMT_GBRP10:

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

  729.             s->bits_per_raw_sample = 10;

  730.     case AV_PIX_FMT_GBRP12:

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

  732.             s->bits_per_raw_sample = 12;

  733.     case AV_PIX_FMT_GBRP14:

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

  735.             s->bits_per_raw_sample = 14;

  736.         else if (!s->bits_per_raw_sample)

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

  738.         s->colorspace = 1;

  739.         s->chroma_planes = 1;

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

  741.         break;

  742.     default:

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

  744.         return AVERROR(ENOSYS);

  745.     }

  746.     if (s->transparency) {

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

  748.     }

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

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

  751.         return AVERROR(EINVAL);

  752.     }

  753. 

  754.     if (s->ac > 1)

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

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

  757. 

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

  759.         s->quant_table_count = 2;

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

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

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

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

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

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

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

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

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

  769.         } else {

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

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

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

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

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

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

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

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

  778.         }

  779.     }

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

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

  782.     memcpy(s->quant_table, s->quant_tables[avctx->context_model],

  783.            sizeof(s->quant_table));

  784. 

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

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

  787. 

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

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

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

  791.     }

  792. 

  793.     if ((ret = ffv1_allocate_initial_states(s)) < 0)

  794.         return ret;

  795. 

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

  797.     if (!s->transparency)

  798.         s->plane_count = 2;

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

  800.     s->picture_number = 0;

  801. 

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

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

  804.             s->rc_stat2[i] = av_mallocz(s->context_count[i] *

  805.                                         sizeof(*s->rc_stat2[i]));

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

  807.                 return AVERROR(ENOMEM);

  808.         }

  809.     }

  810.     if (avctx->stats_in) {

  811.         char *p = avctx->stats_in;

  812.         uint8_t best_state[256][256];

  813.         int gob_count = 0;

  814.         char *next;

  815. 

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

  817. 

  818.         for (;;) {

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

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

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

  822.                     if (next == p) {

  823.                         av_log(avctx, AV_LOG_ERROR,

  824.                                "2Pass file invalid at %d %d [%s]\n", j, i, p);

  825.                         return AVERROR_INVALIDDATA;

  826.                     }

  827.                     p = next;

  828.                 }

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

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

  831.                     for (k = 0; k < 32; k++)

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

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

  834.                             if (next == p) {

  835.                                 av_log(avctx, AV_LOG_ERROR,

  836.                                        "2Pass file invalid at %d %d %d %d [%s]\n",

  837.                                        i, j, k, m, p);

  838.                                 return AVERROR_INVALIDDATA;

  839.                             }

  840.                             p = next;

  841.                         }

  842.                 }

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

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

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

  846.                 return AVERROR_INVALIDDATA;

  847.             }

  848.             p = next;

  849.             while (*p == '\n' || *p == ' ')

  850.                 p++;

  851.             if (p[0] == 0)

  852.                 break;

  853.         }

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

  855. 

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

  857. 

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

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

  860.                 double a=0, b=0;

  861.                 int jp = 0;

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

  863.                     double p = 128;

  864.                     if (s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1] > 200 && j || a+b > 200) {

  865.                         if (a+b)

  866.                             p = 256.0 * b / (a + b);

  867.                         s->initial_states[i][jp][k] =

  868.                             best_state[av_clip(round(p), 1, 255)][av_clip((a + b) / gob_count, 0, 255)];

  869.                         for(jp++; jp<j; jp++)

  870.                             s->initial_states[i][jp][k] = s->initial_states[i][jp-1][k];

  871.                         a=b=0;

  872.                     }

  873.                     a += s->rc_stat2[i][j][k][0];

  874.                     b += s->rc_stat2[i][j][k][1];

  875.                     if (a+b) {

  876.                         p = 256.0 * b / (a + b);

  877.                     }

  878.                     s->initial_states[i][j][k] =

  879.                         best_state[av_clip(round(p), 1, 255)][av_clip((a + b) / gob_count, 0, 255)];

  880.                 }

  881.             }

  882.         }

  883.     }

  884. 

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

  886.         s->num_v_slices = (avctx->width > 352 || avctx->height > 288 || !avctx->slices) ? 2 : 1;

  887.         for (; s->num_v_slices < 9; s->num_v_slices++) {

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

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

  890.                     goto slices_ok;

  891.             }

  892.         }

  893.         av_log(avctx, AV_LOG_ERROR,

  894.                "Unsupported number %d of slices requested, please specify a "

  895.                "supported number with -slices (ex:4,6,9,12,16, ...)\n",

  896.                avctx->slices);

  897.         return AVERROR(ENOSYS);

  898. slices_ok:

  899.         write_extradata(s);

  900.     }

  901. 

  902.     if ((ret = ffv1_init_slice_contexts(s)) < 0)

  903.         return ret;

  904.     if ((ret = ffv1_init_slices_state(s)) < 0)

  905.         return ret;

  906. 

  907. #define STATS_OUT_SIZE 1024 * 1024 * 6

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

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

  910.         if (!avctx->stats_out)

  911.             return AVERROR(ENOMEM);

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

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

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

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

  916.                 sf->rc_stat2[i] = av_mallocz(s->context_count[i] *

  917.                                              sizeof(*sf->rc_stat2[i]));

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

  919.                     return AVERROR(ENOMEM);

  920.             }

  921.     }

  922. 

  923.     return 0;

  924. }

  925. 

  926. static void encode_slice_header(FFV1Context *f, FFV1Context *fs)

  927. {

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

  929.     uint8_t state[CONTEXT_SIZE];

  930.     int j;

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

  932. 

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

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

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

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

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

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

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

  940.     }

  941.     if (!f->picture.interlaced_frame)

  942.         put_symbol(c, state, 3, 0);

  943.     else

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

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

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

  947. }

  948. 

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

  950. {

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

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

  953.     int width        = fs->slice_width;

  954.     int height       = fs->slice_height;

  955.     int x            = fs->slice_x;

  956.     int y            = fs->slice_y;

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

  958.     const int ps     = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step_minus1 + 1;

  959. 

  960.     if (p->key_frame)

  961.         ffv1_clear_slice_state(f, fs);

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

  963.         encode_slice_header(f, fs);

  964.     }

  965.     if (!fs->ac) {

  966.         if (f->version > 2)

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

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

  969.         init_put_bits(&fs->pb,

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

  971.                       fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  972.     }

  973. 

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

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

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

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

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

  979. 

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

  981. 

  982.         if (f->chroma_planes) {

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

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

  985.         }

  986.         if (fs->transparency)

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

  988.     } else {

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

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

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

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

  993.     }

  994.     emms_c();

  995. 

  996.     return 0;

  997. }

  998. 

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

  1000.                         const AVFrame *pict, int *got_packet)

  1001. {

  1002.     FFV1Context *f      = avctx->priv_data;

  1003.     RangeCoder *const c = &f->slice_context[0]->c;

  1004.     AVFrame *const p    = &f->picture;

  1005.     int used_count      = 0;

  1006.     uint8_t keystate    = 128;

  1007.     uint8_t *buf_p;

  1008.     int i, ret;

  1009. 

  1010.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1011.                                             + FF_MIN_BUFFER_SIZE)) < 0)

  1012.         return ret;

  1013. 

  1014.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1015.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  1016. 

  1017.     *p           = *pict;

  1018.     p->pict_type = AV_PICTURE_TYPE_I;

  1019. 

  1020.     if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {

  1021.         put_rac(c, &keystate, 1);

  1022.         p->key_frame = 1;

  1023.         f->gob_count++;

  1024.         write_header(f);

  1025.     } else {

  1026.         put_rac(c, &keystate, 0);

  1027.         p->key_frame = 0;

  1028.     }

  1029. 

  1030.     if (f->ac > 1) {

  1031.         int i;

  1032.         for (i = 1; i < 256; i++) {

  1033.             c->one_state[i]        = f->state_transition[i];

  1034.             c->zero_state[256 - i] = 256 - c->one_state[i];

  1035.         }

  1036.     }

  1037. 

  1038.     for (i = 1; i < f->slice_count; i++) {

  1039.         FFV1Context *fs = f->slice_context[i];

  1040.         uint8_t *start  = pkt->data + (pkt->size - used_count) * (int64_t)i / f->slice_count;

  1041.         int len         = pkt->size / f->slice_count;

  1042.         ff_init_range_encoder(&fs->c, start, len);

  1043.     }

  1044.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,

  1045.                    f->slice_count, sizeof(void *));

  1046. 

  1047.     buf_p = pkt->data;

  1048.     for (i = 0; i < f->slice_count; i++) {

  1049.         FFV1Context *fs = f->slice_context[i];

  1050.         int bytes;

  1051. 

  1052.         if (fs->ac) {

  1053.             uint8_t state = 129;

  1054.             put_rac(&fs->c, &state, 0);

  1055.             bytes = ff_rac_terminate(&fs->c);

  1056.         } else {

  1057.             flush_put_bits(&fs->pb); // FIXME: nicer padding

  1058.             bytes = fs->ac_byte_count + (put_bits_count(&fs->pb) + 7) / 8;

  1059.         }

  1060.         if (i > 0 || f->version > 2) {

  1061.             av_assert0(bytes < pkt->size / f->slice_count);

  1062.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1063.             av_assert0(bytes < (1 << 24));

  1064.             AV_WB24(buf_p + bytes, bytes);

  1065.             bytes += 3;

  1066.         }

  1067.         if (f->ec) {

  1068.             unsigned v;

  1069.             buf_p[bytes++] = 0;

  1070.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1071.             AV_WL32(buf_p + bytes, v);

  1072.             bytes += 4;

  1073.         }

  1074.         buf_p += bytes;

  1075.     }

  1076. 

  1077.     if ((avctx->flags & CODEC_FLAG_PASS1) && (f->picture_number & 31) == 0) {

  1078.         int j, k, m;

  1079.         char *p   = avctx->stats_out;

  1080.         char *end = p + STATS_OUT_SIZE;

  1081. 

  1082.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

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

  1084.             memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));

  1085. 

  1086.         for (j = 0; j < f->slice_count; j++) {

  1087.             FFV1Context *fs = f->slice_context[j];

  1088.             for (i = 0; i < 256; i++) {

  1089.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1090.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1091.             }

  1092.             for (i = 0; i < f->quant_table_count; i++) {

  1093.                 for (k = 0; k < f->context_count[i]; k++)

  1094.                     for (m = 0; m < 32; m++) {

  1095.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1096.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1097.                     }

  1098.             }

  1099.         }

  1100. 

  1101.         for (j = 0; j < 256; j++) {

  1102.             snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1103.                      f->rc_stat[j][0], f->rc_stat[j][1]);

  1104.             p += strlen(p);

  1105.         }

  1106.         snprintf(p, end - p, "\n");

  1107. 

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

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

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

  1111.                     snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1112.                              f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1113.                     p += strlen(p);

  1114.                 }

  1115.         }

  1116.         snprintf(p, end - p, "%d\n", f->gob_count);

  1117.     } else if (avctx->flags & CODEC_FLAG_PASS1)

  1118.         avctx->stats_out[0] = '\0';

  1119. 

  1120.     f->picture_number++;

  1121.     pkt->size   = buf_p - pkt->data;

  1122.     pkt->flags |= AV_PKT_FLAG_KEY * p->key_frame;

  1123.     *got_packet = 1;

  1124. 

  1125.     return 0;

  1126. }

  1127. 

  1128. #define OFFSET(x) offsetof(FFV1Context, x)

  1129. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1130. static const AVOption options[] = {

  1131.     { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },

  1132.     { NULL }

  1133. };

  1134. 

  1135. static const AVClass class = {

  1136.     .class_name = "ffv1 encoder",

  1137.     .item_name  = av_default_item_name,

  1138.     .option     = options,

  1139.     .version    = LIBAVUTIL_VERSION_INT,

  1140. };

  1141. 

  1142. static const AVCodecDefault ffv1_defaults[] = {

  1143.     { "coder", "-1" },

  1144.     { NULL },

  1145. };

  1146. 

  1147. AVCodec ff_ffv1_encoder = {

  1148.     .name           = "ffv1",

  1149.     .type           = AVMEDIA_TYPE_VIDEO,

  1150.     .id             = AV_CODEC_ID_FFV1,

  1151.     .priv_data_size = sizeof(FFV1Context),

  1152.     .init           = encode_init,

  1153.     .encode2        = encode_frame,

  1154.     .close          = ffv1_close,

  1155.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1156.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1157.         AV_PIX_FMT_YUV420P,   AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,  AV_PIX_FMT_YUV444P,

  1158.         AV_PIX_FMT_YUVA444P,  AV_PIX_FMT_YUV440P,   AV_PIX_FMT_YUV422P,   AV_PIX_FMT_YUV411P,

  1159.         AV_PIX_FMT_YUV410P,   AV_PIX_FMT_0RGB32,    AV_PIX_FMT_RGB32,     AV_PIX_FMT_YUV420P16,

  1160.         AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV444P9,  AV_PIX_FMT_YUV422P9,

  1161.         AV_PIX_FMT_YUV420P9,  AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  1162.         AV_PIX_FMT_GRAY16,    AV_PIX_FMT_GRAY8,     AV_PIX_FMT_GBRP9,     AV_PIX_FMT_GBRP10,

  1163.         AV_PIX_FMT_GBRP12,    AV_PIX_FMT_GBRP14,

  1164.         AV_PIX_FMT_NONE

  1165. 

  1166.     },

  1167.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1168.     .defaults       = ffv1_defaults,

  1169.     .priv_class     = &class,

  1170. };