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FFmpeg/libavcodec/ffv1enc.c

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  1. /*

  2.  * FFV1 encoder

  3.  *

  4.  * Copyright (c) 2003-2013 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. 

  36. #include "avcodec.h"

  37. #include "internal.h"

  38. #include "put_bits.h"

  39. #include "rangecoder.h"

  40. #include "golomb.h"

  41. #include "mathops.h"

  42. #include "ffv1.h"

  43. 

  44. static const int8_t quant5_10bit[256] = {

  45.      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  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,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  48.      1,  1,  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, -2,

  57.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1,

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

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

  60.     -1, -1, -1, -1, -1, -1, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0,

  61. };

  62. 

  63. static const int8_t quant5[256] = {

  64.      0,  1,  1,  1,  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, -2, -2, -2,

  79.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1,

  80. };

  81. 

  82. static const int8_t quant9_10bit[256] = {

  83.      0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  84.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,

  85.      3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,

  86.      3,  3,  3,  3,  3,  3,  3,  3,  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, -4, -4, -4, -4, -4, -4, -4,

  95.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3,

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

  97.     -3, -3, -3, -3, -3, -3, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  98.     -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0,

  99. };

  100. 

  101. static const int8_t quant11[256] = {

  102.      0,  1,  2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,

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

  104.      4,  4,  4,  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, -5, -5,

  115.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -4, -4,

  116.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  117.     -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1,

  118. };

  119. 

  120. static const uint8_t ver2_state[256] = {

  121.       0,  10,  10,  10,  10,  16,  16,  16, 28,   16,  16,  29,  42,  49,  20,  49,

  122.      59,  25,  26,  26,  27,  31,  33,  33, 33,   34,  34,  37,  67,  38,  39,  39,

  123.      40,  40,  41,  79,  43,  44,  45,  45, 48,   48,  64,  50,  51,  52,  88,  52,

  124.      53,  74,  55,  57,  58,  58,  74,  60, 101,  61,  62,  84,  66,  66,  68,  69,

  125.      87,  82,  71,  97,  73,  73,  82,  75, 111,  77,  94,  78,  87,  81,  83,  97,

  126.      85,  83,  94,  86,  99,  89,  90,  99, 111,  92,  93,  134, 95,  98,  105, 98,

  127.     105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  128.     115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

  129.     165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  130.     147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  131.     172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  132.     175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  133.     197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  134.     209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  135.     226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  136.     241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  137. };

  138. 

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

  140.                             const uint8_t one_state[256])

  141. {

  142.     int i, j, k, m;

  143.     double l2tab[256];

  144. 

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

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

  147. 

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

  149.         double best_len[256];

  150.         double p = i / 256.0;

  151. 

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

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

  154. 

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

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

  157.             double len      = 0;

  158.             occ[j] = 1.0;

  159. 

  160.             if (!one_state[j])

  161.                 continue;

  162. 

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

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

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

  166.                     if (occ[m]) {

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

  168.                                       + (1-p)*l2tab[256-m]);

  169.                     }

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

  171.                     best_len[k]      = len;

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

  173.                 }

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

  175.                     if (occ[m]) {

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

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

  178.                     }

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

  180.             }

  181.         }

  182.     }

  183. }

  184. 

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

  186.                                                           uint8_t *state, int v,

  187.                                                           int is_signed,

  188.                                                           uint64_t rc_stat[256][2],

  189.                                                           uint64_t rc_stat2[32][2])

  190. {

  191.     int i;

  192. 

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

  194.     do {                                        \

  195.         if (rc_stat) {                          \

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

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

  198.         }                                       \

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

  200.     } while (0)

  201. 

  202.     if (v) {

  203.         const int a = FFABS(v);

  204.         const int e = av_log2(a);

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

  206.         if (e <= 9) {

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

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

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

  210. 

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

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

  213. 

  214.             if (is_signed)

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

  216.         } else {

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

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

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

  220. 

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

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

  223. 

  224.             if (is_signed)

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

  226.         }

  227.     } else {

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

  229.     }

  230. #undef put_rac

  231. }

  232. 

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

  234.                                    int v, int is_signed)

  235. {

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

  237. }

  238. 

  239. 

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

  241.                                   int v, int bits)

  242. {

  243.     int i, k, code;

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

  245. 

  246.     i = state->count;

  247.     k = 0;

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

  249.         k++;

  250.         i += i;

  251.     }

  252. 

  253.     av_assert2(k <= 13);

  254. 

  255. #if 0 // JPEG LS

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

  257.         code = v ^ (-1);

  258.     else

  259.         code = v;

  260. #else

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

  262. #endif

  263. 

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

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

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

  267. 

  268.     update_vlc_state(state, v);

  269. }

  270. 

  271. #define TYPE int16_t

  272. #define RENAME(name) name

  273. #include "ffv1enc_template.c"

  274. #undef TYPE

  275. #undef RENAME

  276. 

  277. #define TYPE int32_t

  278. #define RENAME(name) name ## 32

  279. #include "ffv1enc_template.c"

  280. 

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

  282.                          int stride, int plane_index, int pixel_stride)

  283. {

  284.     int x, y, i, ret;

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

  286.     int16_t *sample[3];

  287.     s->run_index = 0;

  288. 

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

  290. 

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

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

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

  294. 

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

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

  297. // { START_TIMER

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

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

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

  301.             if((ret = encode_line(s, w, sample, plane_index, 8)) < 0)

  302.                 return ret;

  303.         } else {

  304.             if (s->packed_at_lsb) {

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

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

  307.                 }

  308.             } else {

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

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

  311.                 }

  312.             }

  313.             if((ret = encode_line(s, w, sample, plane_index, s->bits_per_raw_sample)) < 0)

  314.                 return ret;

  315.         }

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

  317.     }

  318.     return 0;

  319. }

  320. 

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

  322. {

  323.     int last = 0;

  324.     int i;

  325.     uint8_t state[CONTEXT_SIZE];

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

  327. 

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

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

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

  331.             last = i;

  332.         }

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

  334. }

  335. 

  336. static void write_quant_tables(RangeCoder *c,

  337.                                int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  338. {

  339.     int i;

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

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

  342. }

  343. 

  344. static void write_header(FFV1Context *f)

  345. {

  346.     uint8_t state[CONTEXT_SIZE];

  347.     int i, j;

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

  349. 

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

  351. 

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

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

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

  355.         if (f->ac == AC_RANGE_CUSTOM_TAB) {

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

  357.                 put_symbol(c, state,

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

  359.         }

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

  361.         if (f->version > 0)

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

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

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

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

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

  367. 

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

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

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

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

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

  373.             put_symbol(c, state,

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

  375.             put_symbol(c, state,

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

  377.             put_symbol(c, state,

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

  379.                        0);

  380.             put_symbol(c, state,

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

  382.                        0);

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

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

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

  386.             }

  387.         }

  388.     }

  389. }

  390. 

  391. static int write_extradata(FFV1Context *f)

  392. {

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

  394.     uint8_t state[CONTEXT_SIZE];

  395.     int i, j, k;

  396.     uint8_t state2[32][CONTEXT_SIZE];

  397.     unsigned v;

  398. 

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

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

  401. 

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

  403.                                     (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;

  404.     f->avctx->extradata = av_malloc(f->avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);

  405.     if (!f->avctx->extradata)

  406.         return AVERROR(ENOMEM);

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

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

  409. 

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

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

  412.         if (f->version == 3) {

  413.             f->micro_version = 4;

  414.         } else if (f->version == 4)

  415.             f->micro_version = 2;

  416.         put_symbol(c, state, f->micro_version, 0);

  417.     }

  418. 

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

  420.     if (f->ac == AC_RANGE_CUSTOM_TAB)

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

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

  423. 

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

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

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

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

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

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

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

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

  432. 

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

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

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

  436. 

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

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

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

  440.                 break;

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

  442.             put_rac(c, state, 1);

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

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

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

  446.                     put_symbol(c, state2[k],

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

  448.                 }

  449.         } else {

  450.             put_rac(c, state, 0);

  451.         }

  452.     }

  453. 

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

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

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

  457.     }

  458. 

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

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

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

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

  463. 

  464.     return 0;

  465. }

  466. 

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

  468. {

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

  470. 

  471.     do {

  472.         changed = 0;

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

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

  475. 

  476. #define COST(old, new)                                      \

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

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

  479. 

  480. #define COST2(old, new)                         \

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

  482. 

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

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

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

  486.                     int j;

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

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

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

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

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

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

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

  494.                     }

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

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

  497.                             stt[j] = i2;

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

  499.                             stt[j] = i;

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

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

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

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

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

  505.                         }

  506.                     }

  507.                     print = changed = 1;

  508.                 }

  509.             }

  510.         }

  511.     } while (changed);

  512.     return print;

  513. }

  514. 

  515. static av_cold int encode_init(AVCodecContext *avctx)

  516. {

  517.     FFV1Context *s = avctx->priv_data;

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

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

  520. 

  521.     if ((ret = ff_ffv1_common_init(avctx)) < 0)

  522.         return ret;

  523. 

  524.     s->version = 0;

  525. 

  526.     if ((avctx->flags & (AV_CODEC_FLAG_PASS1 | AV_CODEC_FLAG_PASS2)) ||

  527.         avctx->slices > 1)

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

  529. 

  530.     // Unspecified level & slices, we choose version 1.2+ to ensure multithreaded decodability

  531.     if (avctx->slices == 0 && avctx->level < 0 && avctx->width * avctx->height > 720*576)

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

  533. 

  534.     if (avctx->level <= 0 && s->version == 2) {

  535.         s->version = 3;

  536.     }

  537.     if (avctx->level >= 0 && avctx->level <= 4) {

  538.         if (avctx->level < s->version) {

  539.             av_log(avctx, AV_LOG_ERROR, "Version %d needed for requested features but %d requested\n", s->version, avctx->level);

  540.             return AVERROR(EINVAL);

  541.         }

  542.         s->version = avctx->level;

  543.     }

  544. 

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

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

  547.     }

  548. 

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

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

  551.         return AVERROR_INVALIDDATA;

  552.     }

  553. 

  554. #if FF_API_CODER_TYPE

  555. FF_DISABLE_DEPRECATION_WARNINGS

  556.     if (avctx->coder_type != -1)

  557.         s->ac = avctx->coder_type > 0 ? AC_RANGE_CUSTOM_TAB : AC_GOLOMB_RICE;

  558.     else

  559. FF_ENABLE_DEPRECATION_WARNINGS

  560. #endif

  561.     if (s->ac == 1) // Compatbility with common command line usage

  562.         s->ac = AC_RANGE_CUSTOM_TAB;

  563.     else if (s->ac == AC_RANGE_DEFAULT_TAB_FORCE)

  564.         s->ac = AC_RANGE_DEFAULT_TAB;

  565. 

  566.     s->plane_count = 3;

  567.     switch(avctx->pix_fmt) {

  568.     case AV_PIX_FMT_YUV444P9:

  569.     case AV_PIX_FMT_YUV422P9:

  570.     case AV_PIX_FMT_YUV420P9:

  571.     case AV_PIX_FMT_YUVA444P9:

  572.     case AV_PIX_FMT_YUVA422P9:

  573.     case AV_PIX_FMT_YUVA420P9:

  574.         if (!avctx->bits_per_raw_sample)

  575.             s->bits_per_raw_sample = 9;

  576.     case AV_PIX_FMT_YUV444P10:

  577.     case AV_PIX_FMT_YUV420P10:

  578.     case AV_PIX_FMT_YUV422P10:

  579.     case AV_PIX_FMT_YUVA444P10:

  580.     case AV_PIX_FMT_YUVA422P10:

  581.     case AV_PIX_FMT_YUVA420P10:

  582.         s->packed_at_lsb = 1;

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

  584.             s->bits_per_raw_sample = 10;

  585.     case AV_PIX_FMT_GRAY16:

  586.     case AV_PIX_FMT_YUV444P16:

  587.     case AV_PIX_FMT_YUV422P16:

  588.     case AV_PIX_FMT_YUV420P16:

  589.     case AV_PIX_FMT_YUVA444P16:

  590.     case AV_PIX_FMT_YUVA422P16:

  591.     case AV_PIX_FMT_YUVA420P16:

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

  593.             s->bits_per_raw_sample = 16;

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

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

  596.         }

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

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

  599.             return AVERROR_INVALIDDATA;

  600.         }

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

  602.     case AV_PIX_FMT_GRAY8:

  603.     case AV_PIX_FMT_YA8:

  604.     case AV_PIX_FMT_YUV444P:

  605.     case AV_PIX_FMT_YUV440P:

  606.     case AV_PIX_FMT_YUV422P:

  607.     case AV_PIX_FMT_YUV420P:

  608.     case AV_PIX_FMT_YUV411P:

  609.     case AV_PIX_FMT_YUV410P:

  610.     case AV_PIX_FMT_YUVA444P:

  611.     case AV_PIX_FMT_YUVA422P:

  612.     case AV_PIX_FMT_YUVA420P:

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

  614.         s->colorspace = 0;

  615.         s->transparency = desc->nb_components == 4 || desc->nb_components == 2;

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

  617.             s->bits_per_raw_sample = 8;

  618.         else if (!s->bits_per_raw_sample)

  619.             s->bits_per_raw_sample = 8;

  620.         break;

  621.     case AV_PIX_FMT_RGB32:

  622.         s->colorspace = 1;

  623.         s->transparency = 1;

  624.         s->chroma_planes = 1;

  625.         s->bits_per_raw_sample = 8;

  626.         break;

  627.     case AV_PIX_FMT_0RGB32:

  628.         s->colorspace = 1;

  629.         s->chroma_planes = 1;

  630.         s->bits_per_raw_sample = 8;

  631.         break;

  632.     case AV_PIX_FMT_GBRP9:

  633.         if (!avctx->bits_per_raw_sample)

  634.             s->bits_per_raw_sample = 9;

  635.     case AV_PIX_FMT_GBRP10:

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

  637.             s->bits_per_raw_sample = 10;

  638.     case AV_PIX_FMT_GBRP12:

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

  640.             s->bits_per_raw_sample = 12;

  641.     case AV_PIX_FMT_GBRP14:

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

  643.             s->bits_per_raw_sample = 14;

  644.     case AV_PIX_FMT_GBRP16:

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

  646.             s->bits_per_raw_sample = 16;

  647.         else if (!s->bits_per_raw_sample)

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

  649.         s->colorspace = 1;

  650.         s->chroma_planes = 1;

  651.         if (s->bits_per_raw_sample >= 16) {

  652.             s->use32bit = 1;

  653.             if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {

  654.                 av_log(avctx, AV_LOG_ERROR, "16bit RGB is experimental and under development, only use it for experiments\n");

  655.                 return AVERROR_INVALIDDATA;

  656.             }

  657.         }

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

  659.         break;

  660.     default:

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

  662.         return AVERROR(ENOSYS);

  663.     }

  664.     av_assert0(s->bits_per_raw_sample >= 8);

  665. 

  666.     if (s->bits_per_raw_sample > 8) {

  667.         if (s->ac == AC_GOLOMB_RICE) {

  668.             av_log(avctx, AV_LOG_INFO,

  669.                     "bits_per_raw_sample > 8, forcing range coder\n");

  670.             s->ac = AC_RANGE_CUSTOM_TAB;

  671.         }

  672.     }

  673.     if (s->transparency) {

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

  675.     }

  676. #if FF_API_PRIVATE_OPT

  677. FF_DISABLE_DEPRECATION_WARNINGS

  678.     if (avctx->context_model)

  679.         s->context_model = avctx->context_model;

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

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

  682.         return AVERROR(EINVAL);

  683.     }

  684. FF_ENABLE_DEPRECATION_WARNINGS

  685. #endif

  686. 

  687.     if (s->ac == AC_RANGE_CUSTOM_TAB) {

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

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

  690.     } else {

  691.         RangeCoder c;

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

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

  694.             s->state_transition[i] = c.one_state[i];

  695.     }

  696. 

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

  698.         s->quant_table_count = 2;

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

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

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

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

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

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

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

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

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

  708.         } else {

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

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

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

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

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

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

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

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

  717.         }

  718.     }

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

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

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

  722.            sizeof(s->quant_table));

  723. 

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

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

  726. 

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

  728.         p->quant_table_index = s->context_model;

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

  730.     }

  731. 

  732.     if ((ret = ff_ffv1_allocate_initial_states(s)) < 0)

  733.         return ret;

  734. 

  735. #if FF_API_CODED_FRAME

  736. FF_DISABLE_DEPRECATION_WARNINGS

  737.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

  738. FF_ENABLE_DEPRECATION_WARNINGS

  739. #endif

  740. 

  741.     if (!s->transparency)

  742.         s->plane_count = 2;

  743.     if (!s->chroma_planes && s->version > 3)

  744.         s->plane_count--;

  745. 

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

  747.     s->picture_number = 0;

  748. 

  749.     if (avctx->flags & (AV_CODEC_FLAG_PASS1 | AV_CODEC_FLAG_PASS2)) {

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

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

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

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

  754.                 return AVERROR(ENOMEM);

  755.         }

  756.     }

  757.     if (avctx->stats_in) {

  758.         char *p = avctx->stats_in;

  759.         uint8_t (*best_state)[256] = av_malloc_array(256, 256);

  760.         int gob_count = 0;

  761.         char *next;

  762.         if (!best_state)

  763.             return AVERROR(ENOMEM);

  764. 

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

  766. 

  767.         for (;;) {

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

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

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

  771.                     if (next == p) {

  772.                         av_log(avctx, AV_LOG_ERROR,

  773.                                "2Pass file invalid at %d %d [%s]\n", j, i, p);

  774.                         av_freep(&best_state);

  775.                         return AVERROR_INVALIDDATA;

  776.                     }

  777.                     p = next;

  778.                 }

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

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

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

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

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

  784.                             if (next == p) {

  785.                                 av_log(avctx, AV_LOG_ERROR,

  786.                                        "2Pass file invalid at %d %d %d %d [%s]\n",

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

  788.                                 av_freep(&best_state);

  789.                                 return AVERROR_INVALIDDATA;

  790.                             }

  791.                             p = next;

  792.                         }

  793.                 }

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

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

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

  797.                 av_freep(&best_state);

  798.                 return AVERROR_INVALIDDATA;

  799.             }

  800.             p = next;

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

  802.                 p++;

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

  804.                 break;

  805.         }

  806.         if (s->ac == AC_RANGE_CUSTOM_TAB)

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

  808. 

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

  810. 

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

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

  813.                 double a=0, b=0;

  814.                 int jp = 0;

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

  816.                     double p = 128;

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

  818.                         if (a+b)

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

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

  821.                             best_state[av_clip(round(p), 1, 255)][av_clip_uint8((a + b) / gob_count)];

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

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

  824.                         a=b=0;

  825.                     }

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

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

  828.                     if (a+b) {

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

  830.                     }

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

  832.                         best_state[av_clip(round(p), 1, 255)][av_clip_uint8((a + b) / gob_count)];

  833.                 }

  834.             }

  835.         }

  836.         av_freep(&best_state);

  837.     }

  838. 

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

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

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

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

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

  844.                     goto slices_ok;

  845.             }

  846.         }

  847.         av_log(avctx, AV_LOG_ERROR,

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

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

  850.                avctx->slices);

  851.         return AVERROR(ENOSYS);

  852. slices_ok:

  853.         if ((ret = write_extradata(s)) < 0)

  854.             return ret;

  855.     }

  856. 

  857.     if ((ret = ff_ffv1_init_slice_contexts(s)) < 0)

  858.         return ret;

  859.     s->slice_count = s->max_slice_count;

  860.     if ((ret = ff_ffv1_init_slices_state(s)) < 0)

  861.         return ret;

  862. 

  863. #define STATS_OUT_SIZE 1024 * 1024 * 6

  864.     if (avctx->flags & AV_CODEC_FLAG_PASS1) {

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

  866.         if (!avctx->stats_out)

  867.             return AVERROR(ENOMEM);

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

  869.             for (j = 0; j < s->max_slice_count; j++) {

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

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

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

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

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

  875.                     return AVERROR(ENOMEM);

  876.             }

  877.     }

  878. 

  879.     return 0;

  880. }

  881. 

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

  883. {

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

  885.     uint8_t state[CONTEXT_SIZE];

  886.     int j;

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

  888. 

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

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

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

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

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

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

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

  896.     }

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

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

  899.     else

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

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

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

  903.     if (f->version > 3) {

  904.         put_rac(c, state, fs->slice_coding_mode == 1);

  905.         if (fs->slice_coding_mode == 1)

  906.             ff_ffv1_clear_slice_state(f, fs);

  907.         put_symbol(c, state, fs->slice_coding_mode, 0);

  908.         if (fs->slice_coding_mode != 1) {

  909.             put_symbol(c, state, fs->slice_rct_by_coef, 0);

  910.             put_symbol(c, state, fs->slice_rct_ry_coef, 0);

  911.         }

  912.     }

  913. }

  914. 

  915. static void choose_rct_params(FFV1Context *fs, const uint8_t *src[3], const int stride[3], int w, int h)

  916. {

  917. #define NB_Y_COEFF 15

  918.     static const int rct_y_coeff[15][2] = {

  919.         {0, 0}, //      4G

  920.         {1, 1}, //  R + 2G + B

  921.         {2, 2}, // 2R      + 2B

  922.         {0, 2}, //      2G + 2B

  923.         {2, 0}, // 2R + 2G

  924.         {4, 0}, // 4R

  925.         {0, 4}, //           4B

  926. 

  927.         {0, 3}, //      1G + 3B

  928.         {3, 0}, // 3R + 1G

  929.         {3, 1}, // 3R      +  B

  930.         {1, 3}, //  R      + 3B

  931.         {1, 2}, //  R +  G + 2B

  932.         {2, 1}, // 2R +  G +  B

  933.         {0, 1}, //      3G +  B

  934.         {1, 0}, //  R + 3G

  935.     };

  936. 

  937.     int stat[NB_Y_COEFF] = {0};

  938.     int x, y, i, p, best;

  939.     int16_t *sample[3];

  940.     int lbd = fs->bits_per_raw_sample <= 8;

  941. 

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

  943.         int lastr=0, lastg=0, lastb=0;

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

  945.             sample[p] = fs->sample_buffer + p*w;

  946. 

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

  948.             int b, g, r;

  949.             int ab, ag, ar;

  950.             if (lbd) {

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

  952.                 b =  v        & 0xFF;

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

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

  955.             } else {

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

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

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

  959.             }

  960. 

  961.             ar = r - lastr;

  962.             ag = g - lastg;

  963.             ab = b - lastb;

  964.             if (x && y) {

  965.                 int bg = ag - sample[0][x];

  966.                 int bb = ab - sample[1][x];

  967.                 int br = ar - sample[2][x];

  968. 

  969.                 br -= bg;

  970.                 bb -= bg;

  971. 

  972.                 for (i = 0; i<NB_Y_COEFF; i++) {

  973.                     stat[i] += FFABS(bg + ((br*rct_y_coeff[i][0] + bb*rct_y_coeff[i][1])>>2));

  974.                 }

  975. 

  976.             }

  977.             sample[0][x] = ag;

  978.             sample[1][x] = ab;

  979.             sample[2][x] = ar;

  980. 

  981.             lastr = r;

  982.             lastg = g;

  983.             lastb = b;

  984.         }

  985.     }

  986. 

  987.     best = 0;

  988.     for (i=1; i<NB_Y_COEFF; i++) {

  989.         if (stat[i] < stat[best])

  990.             best = i;

  991.     }

  992. 

  993.     fs->slice_rct_by_coef = rct_y_coeff[best][1];

  994.     fs->slice_rct_ry_coef = rct_y_coeff[best][0];

  995. }

  996. 

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

  998. {

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

  1000.     FFV1Context *f   = fs->avctx->priv_data;

  1001.     int width        = fs->slice_width;

  1002.     int height       = fs->slice_height;

  1003.     int x            = fs->slice_x;

  1004.     int y            = fs->slice_y;

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

  1006.     const int ps     = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;

  1007.     int ret;

  1008.     RangeCoder c_bak = fs->c;

  1009.     const uint8_t *planes[3] = {p->data[0] + ps*x + y*p->linesize[0],

  1010.                                 p->data[1] + ps*x + y*p->linesize[1],

  1011.                                 p->data[2] + ps*x + y*p->linesize[2]};

  1012. 

  1013.     fs->slice_coding_mode = 0;

  1014.     if (f->version > 3) {

  1015.         choose_rct_params(fs, planes, p->linesize, width, height);

  1016.     } else {

  1017.         fs->slice_rct_by_coef = 1;

  1018.         fs->slice_rct_ry_coef = 1;

  1019.     }

  1020. 

  1021. retry:

  1022.     if (f->key_frame)

  1023.         ff_ffv1_clear_slice_state(f, fs);

  1024.     if (f->version > 2) {

  1025.         encode_slice_header(f, fs);

  1026.     }

  1027.     if (fs->ac == AC_GOLOMB_RICE) {

  1028.         if (f->version > 2)

  1029.             put_rac(&fs->c, (uint8_t[]) { 129 }, 0);

  1030.         fs->ac_byte_count = f->version > 2 || (!x && !y) ? ff_rac_terminate(&fs->c) : 0;

  1031.         init_put_bits(&fs->pb,

  1032.                       fs->c.bytestream_start + fs->ac_byte_count,

  1033.                       fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  1034.     }

  1035. 

  1036.     if (f->colorspace == 0 && c->pix_fmt != AV_PIX_FMT_YA8) {

  1037.         const int chroma_width  = AV_CEIL_RSHIFT(width,  f->chroma_h_shift);

  1038.         const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);

  1039.         const int cx            = x >> f->chroma_h_shift;

  1040.         const int cy            = y >> f->chroma_v_shift;

  1041. 

  1042.         ret = encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);

  1043. 

  1044.         if (f->chroma_planes) {

  1045.             ret |= encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);

  1046.             ret |= encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);

  1047.         }

  1048.         if (fs->transparency)

  1049.             ret |= encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2, 1);

  1050.     } else if (c->pix_fmt == AV_PIX_FMT_YA8) {

  1051.         ret  = encode_plane(fs, p->data[0] +     ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 2);

  1052.         ret |= encode_plane(fs, p->data[0] + 1 + ps*x + y*p->linesize[0], width, height, p->linesize[0], 1, 2);

  1053.     } else if (f->use32bit) {

  1054.         ret = encode_rgb_frame32(fs, planes, width, height, p->linesize);

  1055.     } else {

  1056.         ret = encode_rgb_frame(fs, planes, width, height, p->linesize);

  1057.     }

  1058.     emms_c();

  1059. 

  1060.     if (ret < 0) {

  1061.         av_assert0(fs->slice_coding_mode == 0);

  1062.         if (fs->version < 4 || !fs->ac) {

  1063.             av_log(c, AV_LOG_ERROR, "Buffer too small\n");

  1064.             return ret;

  1065.         }

  1066.         av_log(c, AV_LOG_DEBUG, "Coding slice as PCM\n");

  1067.         fs->slice_coding_mode = 1;

  1068.         fs->c = c_bak;

  1069.         goto retry;

  1070.     }

  1071. 

  1072.     return 0;

  1073. }

  1074. 

  1075. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1076.                         const AVFrame *pict, int *got_packet)

  1077. {

  1078.     FFV1Context *f      = avctx->priv_data;

  1079.     RangeCoder *const c = &f->slice_context[0]->c;

  1080.     AVFrame *const p    = f->picture.f;

  1081.     int used_count      = 0;

  1082.     uint8_t keystate    = 128;

  1083.     uint8_t *buf_p;

  1084.     int i, ret;

  1085.     int64_t maxsize =   AV_INPUT_BUFFER_MIN_SIZE

  1086.                       + avctx->width*avctx->height*37LL*4;

  1087. 

  1088.     if(!pict) {

  1089.         if (avctx->flags & AV_CODEC_FLAG_PASS1) {

  1090.             int j, k, m;

  1091.             char *p   = avctx->stats_out;

  1092.             char *end = p + STATS_OUT_SIZE;

  1093. 

  1094.             memset(f->rc_stat, 0, sizeof(f->rc_stat));

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

  1096.                 memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));

  1097. 

  1098.             av_assert0(f->slice_count == f->max_slice_count);

  1099.             for (j = 0; j < f->slice_count; j++) {

  1100.                 FFV1Context *fs = f->slice_context[j];

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

  1102.                     f->rc_stat[i][0] += fs->rc_stat[i][0];

  1103.                     f->rc_stat[i][1] += fs->rc_stat[i][1];

  1104.                 }

  1105.                 for (i = 0; i < f->quant_table_count; i++) {

  1106.                     for (k = 0; k < f->context_count[i]; k++)

  1107.                         for (m = 0; m < 32; m++) {

  1108.                             f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1109.                             f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1110.                         }

  1111.                 }

  1112.             }

  1113. 

  1114.             for (j = 0; j < 256; j++) {

  1115.                 snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1116.                         f->rc_stat[j][0], f->rc_stat[j][1]);

  1117.                 p += strlen(p);

  1118.             }

  1119.             snprintf(p, end - p, "\n");

  1120. 

  1121.             for (i = 0; i < f->quant_table_count; i++) {

  1122.                 for (j = 0; j < f->context_count[i]; j++)

  1123.                     for (m = 0; m < 32; m++) {

  1124.                         snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1125.                                 f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1126.                         p += strlen(p);

  1127.                     }

  1128.             }

  1129.             snprintf(p, end - p, "%d\n", f->gob_count);

  1130.         }

  1131.         return 0;

  1132.     }

  1133. 

  1134.     if (f->version > 3)

  1135.         maxsize = AV_INPUT_BUFFER_MIN_SIZE + avctx->width*avctx->height*3LL*4;

  1136. 

  1137.     if ((ret = ff_alloc_packet2(avctx, pkt, maxsize, 0)) < 0)

  1138.         return ret;

  1139. 

  1140.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1141.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  1142. 

  1143.     av_frame_unref(p);

  1144.     if ((ret = av_frame_ref(p, pict)) < 0)

  1145.         return ret;

  1146. #if FF_API_CODED_FRAME

  1147. FF_DISABLE_DEPRECATION_WARNINGS

  1148.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

  1149. FF_ENABLE_DEPRECATION_WARNINGS

  1150. #endif

  1151. 

  1152.     if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {

  1153.         put_rac(c, &keystate, 1);

  1154.         f->key_frame = 1;

  1155.         f->gob_count++;

  1156.         write_header(f);

  1157.     } else {

  1158.         put_rac(c, &keystate, 0);

  1159.         f->key_frame = 0;

  1160.     }

  1161. 

  1162.     if (f->ac == AC_RANGE_CUSTOM_TAB) {

  1163.         int i;

  1164.         for (i = 1; i < 256; i++) {

  1165.             c->one_state[i]        = f->state_transition[i];

  1166.             c->zero_state[256 - i] = 256 - c->one_state[i];

  1167.         }

  1168.     }

  1169. 

  1170.     for (i = 1; i < f->slice_count; i++) {

  1171.         FFV1Context *fs = f->slice_context[i];

  1172.         uint8_t *start  = pkt->data + (pkt->size - used_count) * (int64_t)i / f->slice_count;

  1173.         int len         = pkt->size / f->slice_count;

  1174.         ff_init_range_encoder(&fs->c, start, len);

  1175.     }

  1176.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,

  1177.                    f->slice_count, sizeof(void *));

  1178. 

  1179.     buf_p = pkt->data;

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

  1181.         FFV1Context *fs = f->slice_context[i];

  1182.         int bytes;

  1183. 

  1184.         if (fs->ac != AC_GOLOMB_RICE) {

  1185.             uint8_t state = 129;

  1186.             put_rac(&fs->c, &state, 0);

  1187.             bytes = ff_rac_terminate(&fs->c);

  1188.         } else {

  1189.             flush_put_bits(&fs->pb); // FIXME: nicer padding

  1190.             bytes = fs->ac_byte_count + (put_bits_count(&fs->pb) + 7) / 8;

  1191.         }

  1192.         if (i > 0 || f->version > 2) {

  1193.             av_assert0(bytes < pkt->size / f->slice_count);

  1194.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1195.             av_assert0(bytes < (1 << 24));

  1196.             AV_WB24(buf_p + bytes, bytes);

  1197.             bytes += 3;

  1198.         }

  1199.         if (f->ec) {

  1200.             unsigned v;

  1201.             buf_p[bytes++] = 0;

  1202.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1203.             AV_WL32(buf_p + bytes, v);

  1204.             bytes += 4;

  1205.         }

  1206.         buf_p += bytes;

  1207.     }

  1208. 

  1209.     if (avctx->flags & AV_CODEC_FLAG_PASS1)

  1210.         avctx->stats_out[0] = '\0';

  1211. 

  1212. #if FF_API_CODED_FRAME

  1213. FF_DISABLE_DEPRECATION_WARNINGS

  1214.     avctx->coded_frame->key_frame = f->key_frame;

  1215. FF_ENABLE_DEPRECATION_WARNINGS

  1216. #endif

  1217. 

  1218.     f->picture_number++;

  1219.     pkt->size   = buf_p - pkt->data;

  1220.     pkt->pts    =

  1221.     pkt->dts    = pict->pts;

  1222.     pkt->flags |= AV_PKT_FLAG_KEY * f->key_frame;

  1223.     *got_packet = 1;

  1224. 

  1225.     return 0;

  1226. }

  1227. 

  1228. static av_cold int encode_close(AVCodecContext *avctx)

  1229. {

  1230.     ff_ffv1_close(avctx);

  1231.     return 0;

  1232. }

  1233. 

  1234. #define OFFSET(x) offsetof(FFV1Context, x)

  1235. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1236. static const AVOption options[] = {

  1237.     { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VE },

  1238.     { "coder", "Coder type", OFFSET(ac), AV_OPT_TYPE_INT,

  1239.             { .i64 = 0 }, -2, 2, VE, "coder" },

  1240.         { "rice", "Golomb rice", 0, AV_OPT_TYPE_CONST,

  1241.             { .i64 = AC_GOLOMB_RICE }, INT_MIN, INT_MAX, VE, "coder" },

  1242.         { "range_def", "Range with default table", 0, AV_OPT_TYPE_CONST,

  1243.             { .i64 = AC_RANGE_DEFAULT_TAB_FORCE }, INT_MIN, INT_MAX, VE, "coder" },

  1244.         { "range_tab", "Range with custom table", 0, AV_OPT_TYPE_CONST,

  1245.             { .i64 = AC_RANGE_CUSTOM_TAB }, INT_MIN, INT_MAX, VE, "coder" },

  1246.         { "ac", "Range with custom table (the ac option exists for compatibility and is deprecated)", 0, AV_OPT_TYPE_CONST,

  1247.             { .i64 = 1 }, INT_MIN, INT_MAX, VE, "coder" },

  1248.     { "context", "Context model", OFFSET(context_model), AV_OPT_TYPE_INT,

  1249.             { .i64 = 0 }, 0, 1, VE },

  1250. 

  1251.     { NULL }

  1252. };

  1253. 

  1254. static const AVClass ffv1_class = {

  1255.     .class_name = "ffv1 encoder",

  1256.     .item_name  = av_default_item_name,

  1257.     .option     = options,

  1258.     .version    = LIBAVUTIL_VERSION_INT,

  1259. };

  1260. 

  1261. #if FF_API_CODER_TYPE

  1262. static const AVCodecDefault ffv1_defaults[] = {

  1263.     { "coder", "-1" },

  1264.     { NULL },

  1265. };

  1266. #endif

  1267. 

  1268. AVCodec ff_ffv1_encoder = {

  1269.     .name           = "ffv1",

  1270.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1271.     .type           = AVMEDIA_TYPE_VIDEO,

  1272.     .id             = AV_CODEC_ID_FFV1,

  1273.     .priv_data_size = sizeof(FFV1Context),

  1274.     .init           = encode_init,

  1275.     .encode2        = encode_frame,

  1276.     .close          = encode_close,

  1277.     .capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DELAY,

  1278.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1279.         AV_PIX_FMT_YUV420P,   AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,  AV_PIX_FMT_YUV444P,

  1280.         AV_PIX_FMT_YUVA444P,  AV_PIX_FMT_YUV440P,   AV_PIX_FMT_YUV422P,   AV_PIX_FMT_YUV411P,

  1281.         AV_PIX_FMT_YUV410P,   AV_PIX_FMT_0RGB32,    AV_PIX_FMT_RGB32,     AV_PIX_FMT_YUV420P16,

  1282.         AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV444P9,  AV_PIX_FMT_YUV422P9,

  1283.         AV_PIX_FMT_YUV420P9,  AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  1284.         AV_PIX_FMT_YUVA444P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA420P16,

  1285.         AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA420P10,

  1286.         AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA420P9,

  1287.         AV_PIX_FMT_GRAY16,    AV_PIX_FMT_GRAY8,     AV_PIX_FMT_GBRP9,     AV_PIX_FMT_GBRP10,

  1288.         AV_PIX_FMT_GBRP12,    AV_PIX_FMT_GBRP14,

  1289.         AV_PIX_FMT_YA8,

  1290.         AV_PIX_FMT_GBRP16,

  1291.         AV_PIX_FMT_NONE

  1292. 

  1293.     },

  1294. #if FF_API_CODER_TYPE

  1295.     .defaults       = ffv1_defaults,

  1296. #endif

  1297.     .priv_class     = &ffv1_class,

  1298. };