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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. 

  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. 

  159.             if (!one_state[j])

  160.                 continue;

  161. 

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

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

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

  165.                     if (occ[m]) {

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

  167.                                       + (1-p)*l2tab[256-m]);

  168.                     }

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

  170.                     best_len[k]      = len;

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

  172.                 }

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

  174.                     if (occ[m]) {

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

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

  177.                     }

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

  179.             }

  180.         }

  181.     }

  182. }

  183. 

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

  185.                                                           uint8_t *state, int v,

  186.                                                           int is_signed,

  187.                                                           uint64_t rc_stat[256][2],

  188.                                                           uint64_t rc_stat2[32][2])

  189. {

  190.     int i;

  191. 

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

  193.     do {                                        \

  194.         if (rc_stat) {                          \

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

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

  197.         }                                       \

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

  199.     } while (0)

  200. 

  201.     if (v) {

  202.         const int a = FFABS(v);

  203.         const int e = av_log2(a);

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

  205.         if (e <= 9) {

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

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

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

  209. 

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

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

  212. 

  213.             if (is_signed)

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

  215.         } else {

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

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

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

  219. 

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

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

  222. 

  223.             if (is_signed)

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

  225.         }

  226.     } else {

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

  228.     }

  229. #undef put_rac

  230. }

  231. 

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

  233.                                    int v, int is_signed)

  234. {

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

  236. }

  237. 

  238. 

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

  240.                                   int v, int bits)

  241. {

  242.     int i, k, code;

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

  244. 

  245.     i = state->count;

  246.     k = 0;

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

  248.         k++;

  249.         i += i;

  250.     }

  251. 

  252.     av_assert2(k <= 13);

  253. 

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

  255. 

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

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

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

  259. 

  260.     update_vlc_state(state, v);

  261. }

  262. 

  263. #define TYPE int16_t

  264. #define RENAME(name) name

  265. #include "ffv1enc_template.c"

  266. #undef TYPE

  267. #undef RENAME

  268. 

  269. #define TYPE int32_t

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

  271. #include "ffv1enc_template.c"

  272. 

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

  274.                          int stride, int plane_index, int pixel_stride)

  275. {

  276.     int x, y, i, ret;

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

  278.     int16_t *sample[3];

  279.     s->run_index = 0;

  280. 

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

  282. 

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

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

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

  286. 

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

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

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

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

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

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

  293.                 return ret;

  294.         } else {

  295.             if (s->packed_at_lsb) {

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

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

  298.                 }

  299.             } else {

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

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

  302.                 }

  303.             }

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

  305.                 return ret;

  306.         }

  307.     }

  308.     return 0;

  309. }

  310. 

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

  312. {

  313.     int last = 0;

  314.     int i;

  315.     uint8_t state[CONTEXT_SIZE];

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

  317. 

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

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

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

  321.             last = i;

  322.         }

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

  324. }

  325. 

  326. static void write_quant_tables(RangeCoder *c,

  327.                                int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  328. {

  329.     int i;

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

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

  332. }

  333. 

  334. static int contains_non_128(uint8_t (*initial_state)[CONTEXT_SIZE],

  335.                             int nb_contexts)

  336. {

  337.     if (!initial_state)

  338.         return 0;

  339.     for (int i = 0; i < nb_contexts; i++)

  340.         for (int j = 0; j < CONTEXT_SIZE; j++)

  341.             if (initial_state[i][j] != 128)

  342.                 return 1;

  343.     return 0;

  344. }

  345. 

  346. static void write_header(FFV1Context *f)

  347. {

  348.     uint8_t state[CONTEXT_SIZE];

  349.     int i, j;

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

  351. 

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

  353. 

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

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

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

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

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

  359.                 put_symbol(c, state,

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

  361.         }

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

  363.         if (f->version > 0)

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

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

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

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

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

  369. 

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

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

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

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

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

  375.             put_symbol(c, state,

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

  377.             put_symbol(c, state,

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

  379.             put_symbol(c, state,

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

  381.                        0);

  382.             put_symbol(c, state,

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

  384.                        0);

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

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

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

  388.             }

  389.         }

  390.     }

  391. }

  392. 

  393. static int write_extradata(FFV1Context *f)

  394. {

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

  396.     uint8_t state[CONTEXT_SIZE];

  397.     int i, j, k;

  398.     uint8_t state2[32][CONTEXT_SIZE];

  399.     unsigned v;

  400. 

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

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

  403. 

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

  405.                                     (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;

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

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

  408.         return AVERROR(ENOMEM);

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

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

  411. 

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

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

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

  415.             f->micro_version = 4;

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

  417.             f->micro_version = 2;

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

  419.     }

  420. 

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

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

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

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

  425. 

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

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

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

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

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

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

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

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

  434. 

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

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

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

  438. 

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

  440.         if (contains_non_128(f->initial_states[i], f->context_count[i])) {

  441.             put_rac(c, state, 1);

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

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

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

  445.                     put_symbol(c, state2[k],

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

  447.                 }

  448.         } else {

  449.             put_rac(c, state, 0);

  450.         }

  451.     }

  452. 

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

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

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

  456.     }

  457. 

  458.     f->avctx->extradata_size = ff_rac_terminate(c, 0);

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

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

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

  462. 

  463.     return 0;

  464. }

  465. 

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

  467. {

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

  469. 

  470.     do {

  471.         changed = 0;

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

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

  474. 

  475. #define COST(old, new)                                      \

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

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

  478. 

  479. #define COST2(old, new)                         \

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

  481. 

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

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

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

  485.                     int j;

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

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

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

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

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

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

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

  493.                     }

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

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

  496.                             stt[j] = i2;

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

  498.                             stt[j] = i;

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

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

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

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

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

  504.                         }

  505.                     }

  506.                     print = changed = 1;

  507.                 }

  508.             }

  509.         }

  510.     } while (changed);

  511.     return print;

  512. }

  513. 

  514. static av_cold int encode_init(AVCodecContext *avctx)

  515. {

  516.     FFV1Context *s = avctx->priv_data;

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

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

  519. 

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

  521.         return ret;

  522. 

  523.     s->version = 0;

  524. 

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

  526.         avctx->slices > 1)

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

  528. 

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

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

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

  532. 

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

  534.         s->version = 3;

  535.     }

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

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

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

  539.             return AVERROR(EINVAL);

  540.         }

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

  542.     }

  543. 

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

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

  546.     }

  547. 

  548.     // CRC requires version 3+

  549.     if (s->ec)

  550.         s->version = FFMAX(s->version, 3);

  551. 

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

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

  554.         return AVERROR_INVALIDDATA;

  555.     }

  556. 

  557. #if FF_API_CODER_TYPE

  558. FF_DISABLE_DEPRECATION_WARNINGS

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

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

  561.     else

  562. FF_ENABLE_DEPRECATION_WARNINGS

  563. #endif

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

  565.         s->ac = AC_RANGE_CUSTOM_TAB;

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

  567.         s->ac = AC_RANGE_DEFAULT_TAB;

  568. 

  569.     s->plane_count = 3;

  570.     switch(avctx->pix_fmt) {

  571.     case AV_PIX_FMT_GRAY9:

  572.     case AV_PIX_FMT_YUV444P9:

  573.     case AV_PIX_FMT_YUV422P9:

  574.     case AV_PIX_FMT_YUV420P9:

  575.     case AV_PIX_FMT_YUVA444P9:

  576.     case AV_PIX_FMT_YUVA422P9:

  577.     case AV_PIX_FMT_YUVA420P9:

  578.         if (!avctx->bits_per_raw_sample)

  579.             s->bits_per_raw_sample = 9;

  580.     case AV_PIX_FMT_GRAY10:

  581.     case AV_PIX_FMT_YUV444P10:

  582.     case AV_PIX_FMT_YUV440P10:

  583.     case AV_PIX_FMT_YUV420P10:

  584.     case AV_PIX_FMT_YUV422P10:

  585.     case AV_PIX_FMT_YUVA444P10:

  586.     case AV_PIX_FMT_YUVA422P10:

  587.     case AV_PIX_FMT_YUVA420P10:

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

  589.             s->bits_per_raw_sample = 10;

  590.     case AV_PIX_FMT_GRAY12:

  591.     case AV_PIX_FMT_YUV444P12:

  592.     case AV_PIX_FMT_YUV440P12:

  593.     case AV_PIX_FMT_YUV420P12:

  594.     case AV_PIX_FMT_YUV422P12:

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

  596.             s->bits_per_raw_sample = 12;

  597.     case AV_PIX_FMT_YUV444P14:

  598.     case AV_PIX_FMT_YUV420P14:

  599.     case AV_PIX_FMT_YUV422P14:

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

  601.             s->bits_per_raw_sample = 14;

  602.         s->packed_at_lsb = 1;

  603.     case AV_PIX_FMT_GRAY16:

  604.     case AV_PIX_FMT_YUV444P16:

  605.     case AV_PIX_FMT_YUV422P16:

  606.     case AV_PIX_FMT_YUV420P16:

  607.     case AV_PIX_FMT_YUVA444P16:

  608.     case AV_PIX_FMT_YUVA422P16:

  609.     case AV_PIX_FMT_YUVA420P16:

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

  611.             s->bits_per_raw_sample = 16;

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

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

  614.         }

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

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

  617.             return AVERROR_INVALIDDATA;

  618.         }

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

  620.     case AV_PIX_FMT_GRAY8:

  621.     case AV_PIX_FMT_YA8:

  622.     case AV_PIX_FMT_YUV444P:

  623.     case AV_PIX_FMT_YUV440P:

  624.     case AV_PIX_FMT_YUV422P:

  625.     case AV_PIX_FMT_YUV420P:

  626.     case AV_PIX_FMT_YUV411P:

  627.     case AV_PIX_FMT_YUV410P:

  628.     case AV_PIX_FMT_YUVA444P:

  629.     case AV_PIX_FMT_YUVA422P:

  630.     case AV_PIX_FMT_YUVA420P:

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

  632.         s->colorspace = 0;

  633.         s->transparency = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);

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

  635.             s->bits_per_raw_sample = 8;

  636.         else if (!s->bits_per_raw_sample)

  637.             s->bits_per_raw_sample = 8;

  638.         break;

  639.     case AV_PIX_FMT_RGB32:

  640.         s->colorspace = 1;

  641.         s->transparency = 1;

  642.         s->chroma_planes = 1;

  643.         s->bits_per_raw_sample = 8;

  644.         break;

  645.     case AV_PIX_FMT_RGBA64:

  646.         s->colorspace = 1;

  647.         s->transparency = 1;

  648.         s->chroma_planes = 1;

  649.         s->bits_per_raw_sample = 16;

  650.         s->use32bit = 1;

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

  652.         break;

  653.     case AV_PIX_FMT_RGB48:

  654.         s->colorspace = 1;

  655.         s->chroma_planes = 1;

  656.         s->bits_per_raw_sample = 16;

  657.         s->use32bit = 1;

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

  659.         break;

  660.     case AV_PIX_FMT_0RGB32:

  661.         s->colorspace = 1;

  662.         s->chroma_planes = 1;

  663.         s->bits_per_raw_sample = 8;

  664.         break;

  665.     case AV_PIX_FMT_GBRP9:

  666.         if (!avctx->bits_per_raw_sample)

  667.             s->bits_per_raw_sample = 9;

  668.     case AV_PIX_FMT_GBRP10:

  669.     case AV_PIX_FMT_GBRAP10:

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

  671.             s->bits_per_raw_sample = 10;

  672.     case AV_PIX_FMT_GBRP12:

  673.     case AV_PIX_FMT_GBRAP12:

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

  675.             s->bits_per_raw_sample = 12;

  676.     case AV_PIX_FMT_GBRP14:

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

  678.             s->bits_per_raw_sample = 14;

  679.     case AV_PIX_FMT_GBRP16:

  680.     case AV_PIX_FMT_GBRAP16:

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

  682.             s->bits_per_raw_sample = 16;

  683.         else if (!s->bits_per_raw_sample)

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

  685.         s->transparency = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);

  686.         s->colorspace = 1;

  687.         s->chroma_planes = 1;

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

  689.             s->use32bit = 1;

  690.         }

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

  692.         break;

  693.     default:

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

  695.         return AVERROR(ENOSYS);

  696.     }

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

  698. 

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

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

  701.             av_log(avctx, AV_LOG_INFO,

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

  703.             s->ac = AC_RANGE_CUSTOM_TAB;

  704.         }

  705.     }

  706. #if FF_API_PRIVATE_OPT

  707. FF_DISABLE_DEPRECATION_WARNINGS

  708.     if (avctx->context_model)

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

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

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

  712.         return AVERROR(EINVAL);

  713.     }

  714. FF_ENABLE_DEPRECATION_WARNINGS

  715. #endif

  716. 

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

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

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

  720.     } else {

  721.         RangeCoder c;

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

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

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

  725.     }

  726. 

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

  728.         s->quant_table_count = 2;

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

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

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

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

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

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

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

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

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

  738.         } else {

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

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

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

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

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

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

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

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

  747.         }

  748.     }

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

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

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

  752.            sizeof(s->quant_table));

  753. 

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

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

  756. 

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

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

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

  760.     }

  761. 

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

  763.         return ret;

  764. 

  765. #if FF_API_CODED_FRAME

  766. FF_DISABLE_DEPRECATION_WARNINGS

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

  768. FF_ENABLE_DEPRECATION_WARNINGS

  769. #endif

  770. 

  771.     if (!s->transparency)

  772.         s->plane_count = 2;

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

  774.         s->plane_count--;

  775. 

  776.     ret = av_pix_fmt_get_chroma_sub_sample (avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);

  777.     if (ret)

  778.         return ret;

  779. 

  780.     s->picture_number = 0;

  781. 

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

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

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

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

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

  787.                 return AVERROR(ENOMEM);

  788.         }

  789.     }

  790.     if (avctx->stats_in) {

  791.         char *p = avctx->stats_in;

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

  793.         int gob_count = 0;

  794.         char *next;

  795.         if (!best_state)

  796.             return AVERROR(ENOMEM);

  797. 

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

  799. 

  800.         for (;;) {

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

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

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

  804.                     if (next == p) {

  805.                         av_log(avctx, AV_LOG_ERROR,

  806.                                "2Pass file invalid at %d %d [%s]\n", j, i, p);

  807.                         av_freep(&best_state);

  808.                         return AVERROR_INVALIDDATA;

  809.                     }

  810.                     p = next;

  811.                 }

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

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

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

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

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

  817.                             if (next == p) {

  818.                                 av_log(avctx, AV_LOG_ERROR,

  819.                                        "2Pass file invalid at %d %d %d %d [%s]\n",

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

  821.                                 av_freep(&best_state);

  822.                                 return AVERROR_INVALIDDATA;

  823.                             }

  824.                             p = next;

  825.                         }

  826.                 }

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

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

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

  830.                 av_freep(&best_state);

  831.                 return AVERROR_INVALIDDATA;

  832.             }

  833.             p = next;

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

  835.                 p++;

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

  837.                 break;

  838.         }

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

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

  841. 

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

  843. 

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

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

  846.                 double a=0, b=0;

  847.                 int jp = 0;

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

  849.                     double p = 128;

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

  851.                         if (a+b)

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

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

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

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

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

  857.                         a=b=0;

  858.                     }

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

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

  861.                     if (a+b) {

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

  863.                     }

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

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

  866.                 }

  867.             }

  868.         }

  869.         av_freep(&best_state);

  870.     }

  871. 

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

  873.         int plane_count = 1 + 2*s->chroma_planes + s->transparency;

  874.         int max_h_slices = AV_CEIL_RSHIFT(avctx->width , s->chroma_h_shift);

  875.         int max_v_slices = AV_CEIL_RSHIFT(avctx->height, s->chroma_v_shift);

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

  877. 

  878.         s->num_v_slices = FFMIN(s->num_v_slices, max_v_slices);

  879. 

  880.         for (; s->num_v_slices < 32; s->num_v_slices++) {

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

  882.                 int maxw = (avctx->width  + s->num_h_slices - 1) / s->num_h_slices;

  883.                 int maxh = (avctx->height + s->num_v_slices - 1) / s->num_v_slices;

  884.                 if (s->num_h_slices > max_h_slices || s->num_v_slices > max_v_slices)

  885.                     continue;

  886.                 if (maxw * maxh * (int64_t)(s->bits_per_raw_sample+1) * plane_count > 8<<24)

  887.                     continue;

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

  889.                     goto slices_ok;

  890.             }

  891.         }

  892.         av_log(avctx, AV_LOG_ERROR,

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

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

  895.                avctx->slices);

  896.         return AVERROR(ENOSYS);

  897. slices_ok:

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

  899.             return ret;

  900.     }

  901. 

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

  903.         return ret;

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

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

  906.         return ret;

  907. 

  908. #define STATS_OUT_SIZE 1024 * 1024 * 6

  909.     if (avctx->flags & AV_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->max_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->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.     if (f->version > 3) {

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

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

  951.             ff_ffv1_clear_slice_state(f, fs);

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

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

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

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

  956.         }

  957.     }

  958. }

  959. 

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

  961. {

  962. #define NB_Y_COEFF 15

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

  964.         {0, 0}, //      4G

  965.         {1, 1}, //  R + 2G + B

  966.         {2, 2}, // 2R      + 2B

  967.         {0, 2}, //      2G + 2B

  968.         {2, 0}, // 2R + 2G

  969.         {4, 0}, // 4R

  970.         {0, 4}, //           4B

  971. 

  972.         {0, 3}, //      1G + 3B

  973.         {3, 0}, // 3R + 1G

  974.         {3, 1}, // 3R      +  B

  975.         {1, 3}, //  R      + 3B

  976.         {1, 2}, //  R +  G + 2B

  977.         {2, 1}, // 2R +  G +  B

  978.         {0, 1}, //      3G +  B

  979.         {1, 0}, //  R + 3G

  980.     };

  981. 

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

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

  984.     int16_t *sample[3];

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

  986. 

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

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

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

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

  991. 

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

  993.             int b, g, r;

  994.             int ab, ag, ar;

  995.             if (lbd) {

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

  997.                 b =  v        & 0xFF;

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

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

  1000.             } else {

  1001.                 b = *((const uint16_t*)(src[0] + x*2 + stride[0]*y));

  1002.                 g = *((const uint16_t*)(src[1] + x*2 + stride[1]*y));

  1003.                 r = *((const uint16_t*)(src[2] + x*2 + stride[2]*y));

  1004.             }

  1005. 

  1006.             ar = r - lastr;

  1007.             ag = g - lastg;

  1008.             ab = b - lastb;

  1009.             if (x && y) {

  1010.                 int bg = ag - sample[0][x];

  1011.                 int bb = ab - sample[1][x];

  1012.                 int br = ar - sample[2][x];

  1013. 

  1014.                 br -= bg;

  1015.                 bb -= bg;

  1016. 

  1017.                 for (i = 0; i<NB_Y_COEFF; i++) {

  1018.                     stat[i] += FFABS(bg + ((br*rct_y_coeff[i][0] + bb*rct_y_coeff[i][1])>>2));

  1019.                 }

  1020. 

  1021.             }

  1022.             sample[0][x] = ag;

  1023.             sample[1][x] = ab;

  1024.             sample[2][x] = ar;

  1025. 

  1026.             lastr = r;

  1027.             lastg = g;

  1028.             lastb = b;

  1029.         }

  1030.     }

  1031. 

  1032.     best = 0;

  1033.     for (i=1; i<NB_Y_COEFF; i++) {

  1034.         if (stat[i] < stat[best])

  1035.             best = i;

  1036.     }

  1037. 

  1038.     fs->slice_rct_by_coef = rct_y_coeff[best][1];

  1039.     fs->slice_rct_ry_coef = rct_y_coeff[best][0];

  1040. }

  1041. 

  1042. static int encode_slice(AVCodecContext *c, void *arg)

  1043. {

  1044.     FFV1Context *fs  = *(void **)arg;

  1045.     FFV1Context *f   = fs->avctx->priv_data;

  1046.     int width        = fs->slice_width;

  1047.     int height       = fs->slice_height;

  1048.     int x            = fs->slice_x;

  1049.     int y            = fs->slice_y;

  1050.     const AVFrame *const p = f->picture.f;

  1051.     const int ps     = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;

  1052.     int ret;

  1053.     RangeCoder c_bak = fs->c;

  1054.     const uint8_t *planes[4] = {p->data[0] + ps*x + y*p->linesize[0],

  1055.                                 p->data[1] ? p->data[1] + ps*x + y*p->linesize[1] : NULL,

  1056.                                 p->data[2] ? p->data[2] + ps*x + y*p->linesize[2] : NULL,

  1057.                                 p->data[3] ? p->data[3] + ps*x + y*p->linesize[3] : NULL};

  1058. 

  1059.     fs->slice_coding_mode = 0;

  1060.     if (f->version > 3) {

  1061.         choose_rct_params(fs, planes, p->linesize, width, height);

  1062.     } else {

  1063.         fs->slice_rct_by_coef = 1;

  1064.         fs->slice_rct_ry_coef = 1;

  1065.     }

  1066. 

  1067. retry:

  1068.     if (f->key_frame)

  1069.         ff_ffv1_clear_slice_state(f, fs);

  1070.     if (f->version > 2) {

  1071.         encode_slice_header(f, fs);

  1072.     }

  1073.     if (fs->ac == AC_GOLOMB_RICE) {

  1074.         fs->ac_byte_count = f->version > 2 || (!x && !y) ? ff_rac_terminate(&fs->c, f->version > 2) : 0;

  1075.         init_put_bits(&fs->pb,

  1076.                       fs->c.bytestream_start + fs->ac_byte_count,

  1077.                       fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);

  1078.     }

  1079. 

  1080.     if (f->colorspace == 0 && c->pix_fmt != AV_PIX_FMT_YA8) {

  1081.         const int chroma_width  = AV_CEIL_RSHIFT(width,  f->chroma_h_shift);

  1082.         const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);

  1083.         const int cx            = x >> f->chroma_h_shift;

  1084.         const int cy            = y >> f->chroma_v_shift;

  1085. 

  1086.         ret = encode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);

  1087. 

  1088.         if (f->chroma_planes) {

  1089.             ret |= encode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);

  1090.             ret |= encode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);

  1091.         }

  1092.         if (fs->transparency)

  1093.             ret |= encode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2, 1);

  1094.     } else if (c->pix_fmt == AV_PIX_FMT_YA8) {

  1095.         ret  = encode_plane(fs, p->data[0] +     ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 2);

  1096.         ret |= encode_plane(fs, p->data[0] + 1 + ps*x + y*p->linesize[0], width, height, p->linesize[0], 1, 2);

  1097.     } else if (f->use32bit) {

  1098.         ret = encode_rgb_frame32(fs, planes, width, height, p->linesize);

  1099.     } else {

  1100.         ret = encode_rgb_frame(fs, planes, width, height, p->linesize);

  1101.     }

  1102.     emms_c();

  1103. 

  1104.     if (ret < 0) {

  1105.         av_assert0(fs->slice_coding_mode == 0);

  1106.         if (fs->version < 4 || !fs->ac) {

  1107.             av_log(c, AV_LOG_ERROR, "Buffer too small\n");

  1108.             return ret;

  1109.         }

  1110.         av_log(c, AV_LOG_DEBUG, "Coding slice as PCM\n");

  1111.         fs->slice_coding_mode = 1;

  1112.         fs->c = c_bak;

  1113.         goto retry;

  1114.     }

  1115. 

  1116.     return 0;

  1117. }

  1118. 

  1119. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  1120.                         const AVFrame *pict, int *got_packet)

  1121. {

  1122.     FFV1Context *f      = avctx->priv_data;

  1123.     RangeCoder *const c = &f->slice_context[0]->c;

  1124.     AVFrame *const p    = f->picture.f;

  1125.     uint8_t keystate    = 128;

  1126.     uint8_t *buf_p;

  1127.     int i, ret;

  1128.     int64_t maxsize =   AV_INPUT_BUFFER_MIN_SIZE

  1129.                       + avctx->width*avctx->height*37LL*4;

  1130. 

  1131.     if(!pict) {

  1132.         if (avctx->flags & AV_CODEC_FLAG_PASS1) {

  1133.             int j, k, m;

  1134.             char *p   = avctx->stats_out;

  1135.             char *end = p + STATS_OUT_SIZE;

  1136. 

  1137.             memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1138.             for (i = 0; i < f->quant_table_count; i++)

  1139.                 memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));

  1140. 

  1141.             av_assert0(f->slice_count == f->max_slice_count);

  1142.             for (j = 0; j < f->slice_count; j++) {

  1143.                 FFV1Context *fs = f->slice_context[j];

  1144.                 for (i = 0; i < 256; i++) {

  1145.                     f->rc_stat[i][0] += fs->rc_stat[i][0];

  1146.                     f->rc_stat[i][1] += fs->rc_stat[i][1];

  1147.                 }

  1148.                 for (i = 0; i < f->quant_table_count; i++) {

  1149.                     for (k = 0; k < f->context_count[i]; k++)

  1150.                         for (m = 0; m < 32; m++) {

  1151.                             f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1152.                             f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1153.                         }

  1154.                 }

  1155.             }

  1156. 

  1157.             for (j = 0; j < 256; j++) {

  1158.                 snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1159.                         f->rc_stat[j][0], f->rc_stat[j][1]);

  1160.                 p += strlen(p);

  1161.             }

  1162.             snprintf(p, end - p, "\n");

  1163. 

  1164.             for (i = 0; i < f->quant_table_count; i++) {

  1165.                 for (j = 0; j < f->context_count[i]; j++)

  1166.                     for (m = 0; m < 32; m++) {

  1167.                         snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1168.                                 f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1169.                         p += strlen(p);

  1170.                     }

  1171.             }

  1172.             snprintf(p, end - p, "%d\n", f->gob_count);

  1173.         }

  1174.         return 0;

  1175.     }

  1176. 

  1177.     if (f->version > 3)

  1178.         maxsize = AV_INPUT_BUFFER_MIN_SIZE + avctx->width*avctx->height*3LL*4;

  1179. 

  1180.     if (maxsize > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE - 32) {

  1181.         av_log(avctx, AV_LOG_WARNING, "Cannot allocate worst case packet size, the encoding could fail\n");

  1182.         maxsize = INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE - 32;

  1183.     }

  1184. 

  1185.     if ((ret = ff_alloc_packet2(avctx, pkt, maxsize, 0)) < 0)

  1186.         return ret;

  1187. 

  1188.     ff_init_range_encoder(c, pkt->data, pkt->size);

  1189.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  1190. 

  1191.     av_frame_unref(p);

  1192.     if ((ret = av_frame_ref(p, pict)) < 0)

  1193.         return ret;

  1194. #if FF_API_CODED_FRAME

  1195. FF_DISABLE_DEPRECATION_WARNINGS

  1196.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

  1197. FF_ENABLE_DEPRECATION_WARNINGS

  1198. #endif

  1199. 

  1200.     if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {

  1201.         put_rac(c, &keystate, 1);

  1202.         f->key_frame = 1;

  1203.         f->gob_count++;

  1204.         write_header(f);

  1205.     } else {

  1206.         put_rac(c, &keystate, 0);

  1207.         f->key_frame = 0;

  1208.     }

  1209. 

  1210.     if (f->ac == AC_RANGE_CUSTOM_TAB) {

  1211.         int i;

  1212.         for (i = 1; i < 256; i++) {

  1213.             c->one_state[i]        = f->state_transition[i];

  1214.             c->zero_state[256 - i] = 256 - c->one_state[i];

  1215.         }

  1216.     }

  1217. 

  1218.     for (i = 0; i < f->slice_count; i++) {

  1219.         FFV1Context *fs = f->slice_context[i];

  1220.         uint8_t *start  = pkt->data + pkt->size * (int64_t)i / f->slice_count;

  1221.         int len         = pkt->size / f->slice_count;

  1222.         if (i) {

  1223.             ff_init_range_encoder(&fs->c, start, len);

  1224.         } else {

  1225.             av_assert0(fs->c.bytestream_end >= fs->c.bytestream_start + len);

  1226.             av_assert0(fs->c.bytestream < fs->c.bytestream_start + len);

  1227.             fs->c.bytestream_end = fs->c.bytestream_start + len;

  1228.         }

  1229.     }

  1230.     avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,

  1231.                    f->slice_count, sizeof(void *));

  1232. 

  1233.     buf_p = pkt->data;

  1234.     for (i = 0; i < f->slice_count; i++) {

  1235.         FFV1Context *fs = f->slice_context[i];

  1236.         int bytes;

  1237. 

  1238.         if (fs->ac != AC_GOLOMB_RICE) {

  1239.             bytes = ff_rac_terminate(&fs->c, 1);

  1240.         } else {

  1241.             flush_put_bits(&fs->pb); // FIXME: nicer padding

  1242.             bytes = fs->ac_byte_count + (put_bits_count(&fs->pb) + 7) / 8;

  1243.         }

  1244.         if (i > 0 || f->version > 2) {

  1245.             av_assert0(bytes < pkt->size / f->slice_count);

  1246.             memmove(buf_p, fs->c.bytestream_start, bytes);

  1247.             av_assert0(bytes < (1 << 24));

  1248.             AV_WB24(buf_p + bytes, bytes);

  1249.             bytes += 3;

  1250.         }

  1251.         if (f->ec) {

  1252.             unsigned v;

  1253.             buf_p[bytes++] = 0;

  1254.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1255.             AV_WL32(buf_p + bytes, v);

  1256.             bytes += 4;

  1257.         }

  1258.         buf_p += bytes;

  1259.     }

  1260. 

  1261.     if (avctx->flags & AV_CODEC_FLAG_PASS1)

  1262.         avctx->stats_out[0] = '\0';

  1263. 

  1264. #if FF_API_CODED_FRAME

  1265. FF_DISABLE_DEPRECATION_WARNINGS

  1266.     avctx->coded_frame->key_frame = f->key_frame;

  1267. FF_ENABLE_DEPRECATION_WARNINGS

  1268. #endif

  1269. 

  1270.     f->picture_number++;

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

  1272.     pkt->pts    =

  1273.     pkt->dts    = pict->pts;

  1274.     pkt->flags |= AV_PKT_FLAG_KEY * f->key_frame;

  1275.     *got_packet = 1;

  1276. 

  1277.     return 0;

  1278. }

  1279. 

  1280. static av_cold int encode_close(AVCodecContext *avctx)

  1281. {

  1282.     ff_ffv1_close(avctx);

  1283.     return 0;

  1284. }

  1285. 

  1286. #define OFFSET(x) offsetof(FFV1Context, x)

  1287. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1288. static const AVOption options[] = {

  1289.     { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VE },

  1290.     { "coder", "Coder type", OFFSET(ac), AV_OPT_TYPE_INT,

  1291.             { .i64 = 0 }, -2, 2, VE, "coder" },

  1292.         { "rice", "Golomb rice", 0, AV_OPT_TYPE_CONST,

  1293.             { .i64 = AC_GOLOMB_RICE }, INT_MIN, INT_MAX, VE, "coder" },

  1294.         { "range_def", "Range with default table", 0, AV_OPT_TYPE_CONST,

  1295.             { .i64 = AC_RANGE_DEFAULT_TAB_FORCE }, INT_MIN, INT_MAX, VE, "coder" },

  1296.         { "range_tab", "Range with custom table", 0, AV_OPT_TYPE_CONST,

  1297.             { .i64 = AC_RANGE_CUSTOM_TAB }, INT_MIN, INT_MAX, VE, "coder" },

  1298.         { "ac", "Range with custom table (the ac option exists for compatibility and is deprecated)", 0, AV_OPT_TYPE_CONST,

  1299.             { .i64 = 1 }, INT_MIN, INT_MAX, VE, "coder" },

  1300.     { "context", "Context model", OFFSET(context_model), AV_OPT_TYPE_INT,

  1301.             { .i64 = 0 }, 0, 1, VE },

  1302. 

  1303.     { NULL }

  1304. };

  1305. 

  1306. static const AVClass ffv1_class = {

  1307.     .class_name = "ffv1 encoder",

  1308.     .item_name  = av_default_item_name,

  1309.     .option     = options,

  1310.     .version    = LIBAVUTIL_VERSION_INT,

  1311. };

  1312. 

  1313. #if FF_API_CODER_TYPE

  1314. static const AVCodecDefault ffv1_defaults[] = {

  1315.     { "coder", "-1" },

  1316.     { NULL },

  1317. };

  1318. #endif

  1319. 

  1320. AVCodec ff_ffv1_encoder = {

  1321.     .name           = "ffv1",

  1322.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1323.     .type           = AVMEDIA_TYPE_VIDEO,

  1324.     .id             = AV_CODEC_ID_FFV1,

  1325.     .priv_data_size = sizeof(FFV1Context),

  1326.     .init           = encode_init,

  1327.     .encode2        = encode_frame,

  1328.     .close          = encode_close,

  1329.     .capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DELAY,

  1330.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1331.         AV_PIX_FMT_YUV420P,   AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,  AV_PIX_FMT_YUV444P,

  1332.         AV_PIX_FMT_YUVA444P,  AV_PIX_FMT_YUV440P,   AV_PIX_FMT_YUV422P,   AV_PIX_FMT_YUV411P,

  1333.         AV_PIX_FMT_YUV410P,   AV_PIX_FMT_0RGB32,    AV_PIX_FMT_RGB32,     AV_PIX_FMT_YUV420P16,

  1334.         AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV444P9,  AV_PIX_FMT_YUV422P9,

  1335.         AV_PIX_FMT_YUV420P9,  AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  1336.         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,

  1337.         AV_PIX_FMT_YUVA444P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA420P16,

  1338.         AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA420P10,

  1339.         AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA420P9,

  1340.         AV_PIX_FMT_GRAY16,    AV_PIX_FMT_GRAY8,     AV_PIX_FMT_GBRP9,     AV_PIX_FMT_GBRP10,

  1341.         AV_PIX_FMT_GBRP12,    AV_PIX_FMT_GBRP14,

  1342.         AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12,

  1343.         AV_PIX_FMT_YA8,

  1344.         AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,

  1345.         AV_PIX_FMT_GBRP16, AV_PIX_FMT_RGB48,

  1346.         AV_PIX_FMT_GBRAP16, AV_PIX_FMT_RGBA64,

  1347.         AV_PIX_FMT_GRAY9,

  1348.         AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,

  1349.         AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV440P12,

  1350.         AV_PIX_FMT_NONE

  1351. 

  1352.     },

  1353. #if FF_API_CODER_TYPE

  1354.     .defaults       = ffv1_defaults,

  1355. #endif

  1356.     .priv_class     = &ffv1_class,

  1357. };