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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/attributes.h"

  29. #include "libavutil/avassert.h"

  30. #include "libavutil/crc.h"

  31. #include "libavutil/opt.h"

  32. #include "libavutil/imgutils.h"

  33. #include "libavutil/pixdesc.h"

  34. #include "libavutil/timer.h"

  35. #include "avcodec.h"

  36. #include "internal.h"

  37. #include "put_bits.h"

  38. #include "rangecoder.h"

  39. #include "golomb.h"

  40. #include "mathops.h"

  41. #include "ffv1.h"

  42. 

  43. static const int8_t quant5_10bit[256] = {

  44.      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  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,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  47.      1,  1,  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, -2,

  56.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -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, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

  59.     -1, -1, -1, -1, -1, -1, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0,

  60. };

  61. 

  62. static const int8_t quant5[256] = {

  63.      0,  1,  1,  1,  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, -2, -2, -2,

  78.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1,

  79. };

  80. 

  81. static const int8_t quant9_10bit[256] = {

  82.      0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  83.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,

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

  85.      3,  3,  3,  3,  3,  3,  3,  3,  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, -4, -4, -4, -4, -4, -4, -4,

  94.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3,

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

  96.     -3, -3, -3, -3, -3, -3, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  97.     -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0,

  98. };

  99. 

  100. static const int8_t quant11[256] = {

  101.      0,  1,  2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  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,  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, -5, -5,

  114.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -4, -4,

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

  116.     -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1,

  117. };

  118. 

  119. static const uint8_t ver2_state[256] = {

  120.       0,  10,  10,  10,  10,  16,  16,  16, 28,   16,  16,  29,  42,  49,  20,  49,

  121.      59,  25,  26,  26,  27,  31,  33,  33, 33,   34,  34,  37,  67,  38,  39,  39,

  122.      40,  40,  41,  79,  43,  44,  45,  45, 48,   48,  64,  50,  51,  52,  88,  52,

  123.      53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  124.      87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  125.      85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93,  134, 95,  98,  105, 98,

  126.     105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

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

  128.     165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  129.     147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  130.     172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  131.     175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  132.     197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  133.     209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  134.     226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  135.     241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  136. };

  137. 

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

  139.                             const uint8_t one_state[256])

  140. {

  141.     int i, j, k, m;

  142.     double l2tab[256];

  143. 

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

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

  146. 

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

  148.         double best_len[256];

  149.         double p = i / 256.0;

  150. 

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

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

  153. 

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

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

  156.             double len      = 0;

  157.             occ[j] = 1.0;

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

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

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

  161.                     if (occ[m]) {

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

  163.                                       + (1-p)*l2tab[256-m]);

  164.                     }

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

  166.                     best_len[k]      = len;

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

  168.                 }

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

  170.                     if (occ[m]) {

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

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

  173.                     }

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

  175.             }

  176.         }

  177.     }

  178. }

  179. 

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

  181.                                                           uint8_t *state, int v,

  182.                                                           int is_signed,

  183.                                                           uint64_t rc_stat[256][2],

  184.                                                           uint64_t rc_stat2[32][2])

  185. {

  186.     int i;

  187. 

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

  189.     do {                                        \

  190.         if (rc_stat) {                          \

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

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

  193.         }                                       \

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

  195.     } while (0)

  196. 

  197.     if (v) {

  198.         const int a = FFABS(v);

  199.         const int e = av_log2(a);

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

  201.         if (e <= 9) {

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

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

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

  205. 

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

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

  208. 

  209.             if (is_signed)

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

  211.         } else {

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

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

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

  215. 

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

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

  218. 

  219.             if (is_signed)

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

  221.         }

  222.     } else {

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

  224.     }

  225. #undef put_rac

  226. }

  227. 

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

  229.                                    int v, int is_signed)

  230. {

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

  232. }

  233. 

  234. 

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

  236.                                   int v, int bits)

  237. {

  238.     int i, k, code;

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

  240. 

  241.     i = state->count;

  242.     k = 0;

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

  244.         k++;

  245.         i += i;

  246.     }

  247. 

  248.     av_assert2(k <= 13);

  249. 

  250. #if 0 // JPEG LS

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

  252.         code = v ^ (-1);

  253.     else

  254.         code = v;

  255. #else

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

  257. #endif

  258. 

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

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

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

  262. 

  263.     update_vlc_state(state, v);

  264. }

  265. 

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

  267.                                         int16_t *sample[3],

  268.                                         int plane_index, int bits)

  269. {

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

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

  272.     int x;

  273.     int run_index = s->run_index;

  274.     int run_count = 0;

  275.     int run_mode  = 0;

  276. 

  277.     if (s->ac) {

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

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

  280.             return AVERROR_INVALIDDATA;

  281.         }

  282.     } else {

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

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

  285.             return AVERROR_INVALIDDATA;

  286.         }

  287.     }

  288. 

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

  290.         int diff, context;

  291. 

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

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

  294. 

  295.         if (context < 0) {

  296.             context = -context;

  297.             diff    = -diff;

  298.         }

  299. 

  300.         diff = fold(diff, bits);

  301. 

  302.         if (s->ac) {

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

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

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

  306.             } else {

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

  308.             }

  309.         } else {

  310.             if (context == 0)

  311.                 run_mode = 1;

  312. 

  313.             if (run_mode) {

  314.                 if (diff) {

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

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

  317.                         run_index++;

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

  319.                     }

  320. 

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

  322.                     if (run_index)

  323.                         run_index--;

  324.                     run_count = 0;

  325.                     run_mode  = 0;

  326.                     if (diff > 0)

  327.                         diff--;

  328.                 } else {

  329.                     run_count++;

  330.                 }

  331.             }

  332. 

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

  334.                     run_count, run_index, run_mode, x,

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

  336. 

  337.             if (run_mode == 0)

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

  339.         }

  340.     }

  341.     if (run_mode) {

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

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

  344.             run_index++;

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

  346.         }

  347. 

  348.         if (run_count)

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

  350.     }

  351.     s->run_index = run_index;

  352. 

  353.     return 0;

  354. }

  355. 

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

  357.                          int stride, int plane_index)

  358. {

  359.     int x, y, i;

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

  361.     int16_t *sample[3];

  362.     s->run_index = 0;

  363. 

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

  365. 

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

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

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

  369. 

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

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

  372. // { START_TIMER

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

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

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

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

  377.         } else {

  378.             if (s->packed_at_lsb) {

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

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

  381.                 }

  382.             } else {

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

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

  385.                 }

  386.             }

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

  388.         }

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

  390.     }

  391. }

  392. 

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

  394. {

  395.     int x, y, p, i;

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

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

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

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

  400.     int offset = 1 << bits;

  401. 

  402.     s->run_index = 0;

  403. 

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

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

  406. 

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

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

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

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

  411. 

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

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

  414.             if (lbd) {

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

  416.                 b =  v        & 0xFF;

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

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

  419.                 a =  v >> 24;

  420.             } else {

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

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

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

  424.             }

  425. 

  426.             b -= g;

  427.             r -= g;

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

  429.             b += offset;

  430.             r += offset;

  431. 

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

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

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

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

  436.         }

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

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

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

  440.             if (lbd)

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

  442.             else

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

  444.         }

  445.     }

  446. }

  447. 

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

  449. {

  450.     int last = 0;

  451.     int i;

  452.     uint8_t state[CONTEXT_SIZE];

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

  454. 

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

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

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

  458.             last = i;

  459.         }

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

  461. }

  462. 

  463. static void write_quant_tables(RangeCoder *c,

  464.                                int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  465. {

  466.     int i;

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

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

  469. }

  470. 

  471. static void write_header(FFV1Context *f)

  472. {

  473.     uint8_t state[CONTEXT_SIZE];

  474.     int i, j;

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

  476. 

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

  478. 

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

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

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

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

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

  484.                 put_symbol(c, state,

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

  486.         }

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

  488.         if (f->version > 0)

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

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

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

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

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

  494. 

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

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

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

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

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

  500.             put_symbol(c, state,

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

  502.             put_symbol(c, state,

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

  504.             put_symbol(c, state,

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

  506.                        0);

  507.             put_symbol(c, state,

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

  509.                        0);

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

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

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

  513.             }

  514.         }

  515.     }

  516. }

  517. 

  518. static int write_extradata(FFV1Context *f)

  519. {

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

  521.     uint8_t state[CONTEXT_SIZE];

  522.     int i, j, k;

  523.     uint8_t state2[32][CONTEXT_SIZE];

  524.     unsigned v;

  525. 

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

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

  528. 

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

  530.                                     (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;

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

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

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

  534. 

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

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

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

  538.             f->minor_version = 3;

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

  540.     }

  541. 

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

  543.     if (f->ac > 1)

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

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

  546. 

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

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

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

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

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

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

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

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

  555. 

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

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

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

  559. 

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

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

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

  563.                 break;

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

  565.             put_rac(c, state, 1);

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

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

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

  569.                     put_symbol(c, state2[k],

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

  571.                 }

  572.         } else {

  573.             put_rac(c, state, 0);

  574.         }

  575.     }

  576. 

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

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

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

  580.     }

  581. 

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

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

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

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

  586. 

  587.     return 0;

  588. }

  589. 

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

  591. {

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

  593. 

  594.     do {

  595.         changed = 0;

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

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

  598. 

  599. #define COST(old, new)                                      \

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

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

  602. 

  603. #define COST2(old, new)                         \

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

  605. 

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

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

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

  609.                     int j;

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

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

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

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

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

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

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

  617.                     }

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

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

  620.                             stt[j] = i2;

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

  622.                             stt[j] = i;

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

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

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

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

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

  628.                         }

  629.                     }

  630.                     print = changed = 1;

  631.                 }

  632.             }

  633.         }

  634.     } while (changed);

  635.     return print;

  636. }

  637. 

  638. static av_cold int encode_init(AVCodecContext *avctx)

  639. {

  640.     FFV1Context *s = avctx->priv_data;

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

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

  643. 

  644.     if ((ret = ffv1_common_init(avctx)) < 0)

  645.         return ret;

  646. 

  647.     s->version = 0;

  648. 

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

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

  651. 

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

  653.         s->version = 3;

  654.     }

  655. 

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

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

  658.     }

  659. 

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

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

  662.         return AVERROR_INVALIDDATA;

  663.     }

  664. 

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

  666. 

  667.     s->plane_count = 3;

  668.     switch(avctx->pix_fmt) {

  669.     case AV_PIX_FMT_YUV444P9:

  670.     case AV_PIX_FMT_YUV422P9:

  671.     case AV_PIX_FMT_YUV420P9:

  672.         if (!avctx->bits_per_raw_sample)

  673.             s->bits_per_raw_sample = 9;

  674.     case AV_PIX_FMT_YUV444P10:

  675.     case AV_PIX_FMT_YUV420P10:

  676.     case AV_PIX_FMT_YUV422P10:

  677.         s->packed_at_lsb = 1;

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

  679.             s->bits_per_raw_sample = 10;

  680.     case AV_PIX_FMT_GRAY16:

  681.     case AV_PIX_FMT_YUV444P16:

  682.     case AV_PIX_FMT_YUV422P16:

  683.     case AV_PIX_FMT_YUV420P16:

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

  685.             s->bits_per_raw_sample = 16;

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

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

  688.         }

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

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

  691.             return AVERROR_INVALIDDATA;

  692.         }

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

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

  695.             s->ac = 2;

  696.         }

  697.         if (!s->ac) {

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

  699.             return AVERROR(ENOSYS);

  700.         }

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

  702.     case AV_PIX_FMT_GRAY8:

  703.     case AV_PIX_FMT_YUV444P:

  704.     case AV_PIX_FMT_YUV440P:

  705.     case AV_PIX_FMT_YUV422P:

  706.     case AV_PIX_FMT_YUV420P:

  707.     case AV_PIX_FMT_YUV411P:

  708.     case AV_PIX_FMT_YUV410P:

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

  710.         s->colorspace = 0;

  711.         break;

  712.     case AV_PIX_FMT_YUVA444P:

  713.     case AV_PIX_FMT_YUVA422P:

  714.     case AV_PIX_FMT_YUVA420P:

  715.         s->chroma_planes = 1;

  716.         s->colorspace = 0;

  717.         s->transparency = 1;

  718.         break;

  719.     case AV_PIX_FMT_RGB32:

  720.         s->colorspace = 1;

  721.         s->transparency = 1;

  722.         break;

  723.     case AV_PIX_FMT_0RGB32:

  724.         s->colorspace = 1;

  725.         break;

  726.     case AV_PIX_FMT_GBRP9:

  727.         if (!avctx->bits_per_raw_sample)

  728.             s->bits_per_raw_sample = 9;

  729.     case AV_PIX_FMT_GBRP10:

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

  731.             s->bits_per_raw_sample = 10;

  732.     case AV_PIX_FMT_GBRP12:

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

  734.             s->bits_per_raw_sample = 12;

  735.     case AV_PIX_FMT_GBRP14:

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

  737.             s->bits_per_raw_sample = 14;

  738.         else if (!s->bits_per_raw_sample)

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

  740.         s->colorspace = 1;

  741.         s->chroma_planes = 1;

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

  743.         break;

  744.     default:

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

  746.         return AVERROR(ENOSYS);

  747.     }

  748.     if (s->transparency) {

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

  750.     }

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

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

  753.         return AVERROR(EINVAL);

  754.     }

  755. 

  756.     if (s->ac > 1)

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

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

  759. 

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

  761.         s->quant_table_count = 2;

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

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

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

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

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

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

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

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

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

  771.         } else {

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

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

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

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

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

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

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

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

  780.         }

  781.     }

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

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

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

  785.            sizeof(s->quant_table));

  786. 

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

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

  789. 

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

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

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

  793.     }

  794. 

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

  796.         return ret;

  797. 

  798.     if (!s->transparency)

  799.         s->plane_count = 2;

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

  801.     s->picture_number = 0;

  802. 

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

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

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

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

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

  808.                 return AVERROR(ENOMEM);

  809.         }

  810.     }

  811.     if (avctx->stats_in) {

  812.         char *p = avctx->stats_in;

  813.         uint8_t best_state[256][256];

  814.         int gob_count = 0;

  815.         char *next;

  816. 

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

  818. 

  819.         for (;;) {

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

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

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

  823.                     if (next == p) {

  824.                         av_log(avctx, AV_LOG_ERROR,

  825.                                "2Pass file invalid at %d %d [%s]\n", j, i, p);

  826.                         return AVERROR_INVALIDDATA;

  827.                     }

  828.                     p = next;

  829.                 }

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

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

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

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

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

  835.                             if (next == p) {

  836.                                 av_log(avctx, AV_LOG_ERROR,

  837.                                        "2Pass file invalid at %d %d %d %d [%s]\n",

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

  839.                                 return AVERROR_INVALIDDATA;

  840.                             }

  841.                             p = next;

  842.                         }

  843.                 }

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

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

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

  847.                 return AVERROR_INVALIDDATA;

  848.             }

  849.             p = next;

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

  851.                 p++;

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

  853.                 break;

  854.         }

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

  856. 

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

  858. 

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

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

  861.                 double a=0, b=0;

  862.                 int jp = 0;

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

  864.                     double p = 128;

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

  866.                         if (a+b)

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

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

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

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

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

  872.                         a=b=0;

  873.                     }

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

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

  876.                     if (a+b) {

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

  878.                     }

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

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

  881.                 }

  882.             }

  883.         }

  884.     }

  885. 

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

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

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

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

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

  891.                     goto slices_ok;

  892.             }

  893.         }

  894.         av_log(avctx, AV_LOG_ERROR,

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

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

  897.                avctx->slices);

  898.         return AVERROR(ENOSYS);

  899. slices_ok:

  900.         write_extradata(s);

  901.     }

  902. 

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

  904.         return ret;

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

  906.         return ret;

  907. 

  908. #define STATS_OUT_SIZE 1024 * 1024 * 6

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

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

  911.         if (!avctx->stats_out)

  912.             return AVERROR(ENOMEM);

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

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

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

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

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

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

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

  920.                     return AVERROR(ENOMEM);

  921.             }

  922.     }

  923. 

  924.     return 0;

  925. }

  926. 

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

  928. {

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

  930.     uint8_t state[CONTEXT_SIZE];

  931.     int j;

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

  933. 

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

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

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

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

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

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

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

  941.     }

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

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

  944.     else

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

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

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

  948. }

  949. 

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

  951. {

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

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

  954.     int width        = fs->slice_width;

  955.     int height       = fs->slice_height;

  956.     int x            = fs->slice_x;

  957.     int y            = fs->slice_y;

  958.     AVFrame *const p = f->picture.f;

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

  960. 

  961.     if (p->key_frame)

  962.         ffv1_clear_slice_state(f, fs);

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

  964.         encode_slice_header(f, fs);

  965.     }

  966.     if (!fs->ac) {

  967.         if (f->version > 2)

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

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

  970.         init_put_bits(&fs->pb,

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

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

  973.     }

  974. 

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

  976.         const int chroma_width  = FF_CEIL_RSHIFT(width,  f->chroma_h_shift);

  977.         const int chroma_height = FF_CEIL_RSHIFT(height, f->chroma_v_shift);

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

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

  980. 

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

  982. 

  983.         if (f->chroma_planes) {

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

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

  986.         }

  987.         if (fs->transparency)

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

  989.     } else {

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

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

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

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

  994.     }

  995.     emms_c();

  996. 

  997.     return 0;

  998. }

  999. 

  1000. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1001.                         const AVFrame *pict, int *got_packet)

  1002. {

  1003.     FFV1Context *f      = avctx->priv_data;

  1004.     RangeCoder *const c = &f->slice_context[0]->c;

  1005.     AVFrame *const p    = f->picture.f;

  1006.     int used_count      = 0;

  1007.     uint8_t keystate    = 128;

  1008.     uint8_t *buf_p;

  1009.     int i, ret;

  1010. 

  1011.     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*((8*2+1+1)*4)/8

  1012.                                             + FF_MIN_BUFFER_SIZE)) < 0)

  1013.         return ret;

  1014. 

  1015.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1016.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  1017. 

  1018.     av_frame_unref(p);

  1019.     if ((ret = av_frame_ref(p, pict)) < 0)

  1020.         return ret;

  1021.     p->pict_type = AV_PICTURE_TYPE_I;

  1022. 

  1023.     if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {

  1024.         put_rac(c, &keystate, 1);

  1025.         p->key_frame = 1;

  1026.         f->gob_count++;

  1027.         write_header(f);

  1028.     } else {

  1029.         put_rac(c, &keystate, 0);

  1030.         p->key_frame = 0;

  1031.     }

  1032. 

  1033.     if (f->ac > 1) {

  1034.         int i;

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

  1036.             c->one_state[i]        = f->state_transition[i];

  1037.             c->zero_state[256 - i] = 256 - c->one_state[i];

  1038.         }

  1039.     }

  1040. 

  1041.     for (i = 1; i < f->slice_count; i++) {

  1042.         FFV1Context *fs = f->slice_context[i];

  1043.         uint8_t *start  = pkt->data + (pkt->size - used_count) * (int64_t)i / f->slice_count;

  1044.         int len         = pkt->size / f->slice_count;

  1045.         ff_init_range_encoder(&fs->c, start, len);

  1046.     }

  1047.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,

  1048.                    f->slice_count, sizeof(void *));

  1049. 

  1050.     buf_p = pkt->data;

  1051.     for (i = 0; i < f->slice_count; i++) {

  1052.         FFV1Context *fs = f->slice_context[i];

  1053.         int bytes;

  1054. 

  1055.         if (fs->ac) {

  1056.             uint8_t state = 129;

  1057.             put_rac(&fs->c, &state, 0);

  1058.             bytes = ff_rac_terminate(&fs->c);

  1059.         } else {

  1060.             flush_put_bits(&fs->pb); // FIXME: nicer padding

  1061.             bytes = fs->ac_byte_count + (put_bits_count(&fs->pb) + 7) / 8;

  1062.         }

  1063.         if (i > 0 || f->version > 2) {

  1064.             av_assert0(bytes < pkt->size / f->slice_count);

  1065.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1066.             av_assert0(bytes < (1 << 24));

  1067.             AV_WB24(buf_p + bytes, bytes);

  1068.             bytes += 3;

  1069.         }

  1070.         if (f->ec) {

  1071.             unsigned v;

  1072.             buf_p[bytes++] = 0;

  1073.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1074.             AV_WL32(buf_p + bytes, v);

  1075.             bytes += 4;

  1076.         }

  1077.         buf_p += bytes;

  1078.     }

  1079. 

  1080.     if ((avctx->flags & CODEC_FLAG_PASS1) && (f->picture_number & 31) == 0) {

  1081.         int j, k, m;

  1082.         char *p   = avctx->stats_out;

  1083.         char *end = p + STATS_OUT_SIZE;

  1084. 

  1085.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1086.         for (i = 0; i < f->quant_table_count; i++)

  1087.             memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));

  1088. 

  1089.         for (j = 0; j < f->slice_count; j++) {

  1090.             FFV1Context *fs = f->slice_context[j];

  1091.             for (i = 0; i < 256; i++) {

  1092.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1093.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1094.             }

  1095.             for (i = 0; i < f->quant_table_count; i++) {

  1096.                 for (k = 0; k < f->context_count[i]; k++)

  1097.                     for (m = 0; m < 32; m++) {

  1098.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1099.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1100.                     }

  1101.             }

  1102.         }

  1103. 

  1104.         for (j = 0; j < 256; j++) {

  1105.             snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1106.                      f->rc_stat[j][0], f->rc_stat[j][1]);

  1107.             p += strlen(p);

  1108.         }

  1109.         snprintf(p, end - p, "\n");

  1110. 

  1111.         for (i = 0; i < f->quant_table_count; i++) {

  1112.             for (j = 0; j < f->context_count[i]; j++)

  1113.                 for (m = 0; m < 32; m++) {

  1114.                     snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1115.                              f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1116.                     p += strlen(p);

  1117.                 }

  1118.         }

  1119.         snprintf(p, end - p, "%d\n", f->gob_count);

  1120.     } else if (avctx->flags & CODEC_FLAG_PASS1)

  1121.         avctx->stats_out[0] = '\0';

  1122. 

  1123.     f->picture_number++;

  1124.     pkt->size   = buf_p - pkt->data;

  1125.     pkt->flags |= AV_PKT_FLAG_KEY * p->key_frame;

  1126.     *got_packet = 1;

  1127. 

  1128.     return 0;

  1129. }

  1130. 

  1131. #define OFFSET(x) offsetof(FFV1Context, x)

  1132. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1133. static const AVOption options[] = {

  1134.     { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },

  1135.     { NULL }

  1136. };

  1137. 

  1138. static const AVClass ffv1_class = {

  1139.     .class_name = "ffv1 encoder",

  1140.     .item_name  = av_default_item_name,

  1141.     .option     = options,

  1142.     .version    = LIBAVUTIL_VERSION_INT,

  1143. };

  1144. 

  1145. static const AVCodecDefault ffv1_defaults[] = {

  1146.     { "coder", "-1" },

  1147.     { NULL },

  1148. };

  1149. 

  1150. AVCodec ff_ffv1_encoder = {

  1151.     .name           = "ffv1",

  1152.     .type           = AVMEDIA_TYPE_VIDEO,

  1153.     .id             = AV_CODEC_ID_FFV1,

  1154.     .priv_data_size = sizeof(FFV1Context),

  1155.     .init           = encode_init,

  1156.     .encode2        = encode_frame,

  1157.     .close          = ffv1_close,

  1158.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1159.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1160.         AV_PIX_FMT_YUV420P,   AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,  AV_PIX_FMT_YUV444P,

  1161.         AV_PIX_FMT_YUVA444P,  AV_PIX_FMT_YUV440P,   AV_PIX_FMT_YUV422P,   AV_PIX_FMT_YUV411P,

  1162.         AV_PIX_FMT_YUV410P,   AV_PIX_FMT_0RGB32,    AV_PIX_FMT_RGB32,     AV_PIX_FMT_YUV420P16,

  1163.         AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV444P9,  AV_PIX_FMT_YUV422P9,

  1164.         AV_PIX_FMT_YUV420P9,  AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  1165.         AV_PIX_FMT_GRAY16,    AV_PIX_FMT_GRAY8,     AV_PIX_FMT_GBRP9,     AV_PIX_FMT_GBRP10,

  1166.         AV_PIX_FMT_GBRP12,    AV_PIX_FMT_GBRP14,

  1167.         AV_PIX_FMT_NONE

  1168. 

  1169.     },

  1170.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1171.     .defaults       = ffv1_defaults,

  1172.     .priv_class     = &ffv1_class,

  1173. };