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FFmpeg/libavcodec/ffv1enc.c

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  1. /*

  2.  * FFV1 encoder for libavcodec

  3.  *

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

  5.  *

  6.  * This file is part of Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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/pixdesc.h"

  31. #include "libavutil/crc.h"

  32. #include "libavutil/opt.h"

  33. #include "libavutil/imgutils.h"

  34. #include "avcodec.h"

  35. #include "internal.h"

  36. #include "get_bits.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 void find_best_state(uint8_t best_state[256][256],

  44.                             const uint8_t one_state[256])

  45. {

  46.     int i, j, k, m;

  47.     double l2tab[256];

  48. 

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

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

  51. 

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

  53.         double best_len[256];

  54.         double p = i / 256.0;

  55. 

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

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

  58. 

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

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

  61.             double len      = 0;

  62.             occ[j] = 1.0;

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

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

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

  66.                     if (occ[m]) {

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

  68.                                         (1 - p) * l2tab[256 - m]);

  69.                     }

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

  71.                     best_len[k]      = len;

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

  73.                 }

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

  75.                     if (occ[m]) {

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

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

  78.                     }

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

  80.             }

  81.         }

  82.     }

  83. }

  84. 

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

  86.                                                           uint8_t *state, int v,

  87.                                                           int is_signed,

  88.                                                           uint64_t rc_stat[256][2],

  89.                                                           uint64_t rc_stat2[32][2])

  90. {

  91.     int i;

  92. 

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

  94.     do {                                        \

  95.         if (rc_stat) {                          \

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

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

  98.         }                                       \

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

  100.     } while (0)

  101. 

  102.     if (v) {

  103.         const int a = FFABS(v);

  104.         const int e = av_log2(a);

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

  106.         if (e <= 9) {

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

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

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

  110. 

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

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

  113. 

  114.             if (is_signed)

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

  116.         } else {

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

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

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

  120. 

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

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

  123. 

  124.             if (is_signed)

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

  126.         }

  127.     } else {

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

  129.     }

  130. #undef put_rac

  131. }

  132. 

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

  134.                                    int v, int is_signed)

  135. {

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

  137. }

  138. 

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

  140.                                   int v, int bits)

  141. {

  142.     int i, k, code;

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

  144. 

  145.     i = state->count;

  146.     k = 0;

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

  148.         k++;

  149.         i += i;

  150.     }

  151. 

  152.     assert(k <= 13);

  153. 

  154. #if 0 // JPEG LS

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

  156.         code = v ^ (-1);

  157.     else

  158.         code = v;

  159. #else

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

  161. #endif

  162. 

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

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

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

  166. 

  167.     update_vlc_state(state, v);

  168. }

  169. 

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

  171.                                         int16_t *sample[3],

  172.                                         int plane_index, int bits)

  173. {

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

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

  176.     int x;

  177.     int run_index = s->run_index;

  178.     int run_count = 0;

  179.     int run_mode  = 0;

  180. 

  181.     if (s->ac) {

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

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

  184.             return AVERROR_INVALIDDATA;

  185.         }

  186.     } else {

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

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

  189.             return AVERROR_INVALIDDATA;

  190.         }

  191.     }

  192. 

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

  194.         int diff, context;

  195. 

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

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

  198. 

  199.         if (context < 0) {

  200.             context = -context;

  201.             diff    = -diff;

  202.         }

  203. 

  204.         diff = fold(diff, bits);

  205. 

  206.         if (s->ac) {

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

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

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

  210.             } else {

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

  212.             }

  213.         } else {

  214.             if (context == 0)

  215.                 run_mode = 1;

  216. 

  217.             if (run_mode) {

  218.                 if (diff) {

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

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

  221.                         run_index++;

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

  223.                     }

  224. 

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

  226.                     if (run_index)

  227.                         run_index--;

  228.                     run_count = 0;

  229.                     run_mode  = 0;

  230.                     if (diff > 0)

  231.                         diff--;

  232.                 } else {

  233.                     run_count++;

  234.                 }

  235.             }

  236. 

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

  238.                     run_count, run_index, run_mode, x,

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

  240. 

  241.             if (run_mode == 0)

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

  243.         }

  244.     }

  245.     if (run_mode) {

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

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

  248.             run_index++;

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

  250.         }

  251. 

  252.         if (run_count)

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

  254.     }

  255.     s->run_index = run_index;

  256. 

  257.     return 0;

  258. }

  259. 

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

  261.                          int stride, int plane_index)

  262. {

  263.     int x, y, i;

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

  265.     int16_t *sample[3];

  266.     s->run_index = 0;

  267. 

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

  269. 

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

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

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

  273. 

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

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

  276. // { START_TIMER

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

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

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

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

  281.         } else {

  282.             if (s->packed_at_lsb) {

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

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

  285.             } else {

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

  287.                     sample[0][x] =

  288.                         ((uint16_t *)(src + stride * y))[x] >> (16 - s->bits_per_raw_sample);

  289.             }

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

  291.         }

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

  293.     }

  294. }

  295. 

  296. static void encode_rgb_frame(FFV1Context *s, const uint8_t *src[3],

  297.                              int w, int h, const int stride[3])

  298. {

  299.     int x, y, p, i;

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

  301.     int16_t *sample[MAX_PLANES][3];

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

  303.     int bits = s->avctx->bits_per_raw_sample > 0

  304.                ? s->avctx->bits_per_raw_sample

  305.                : 8;

  306.     int offset = 1 << bits;

  307. 

  308.     s->run_index = 0;

  309. 

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

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

  312. 

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

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

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

  316.                 sample[p][i] = s->sample_buffer + p * ring_size *

  317.                                (w + 6) +

  318.                                ((h + i - y) % ring_size) * (w + 6) + 3;

  319. 

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

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

  322.             if (lbd) {

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

  324.                 b = v & 0xFF;

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

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

  327.                 a = v >> 24;

  328.             } else {

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

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

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

  332.             }

  333. 

  334.             b -= g;

  335.             r -= g;

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

  337.             b += offset;

  338.             r += offset;

  339. 

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

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

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

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

  344.         }

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

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

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

  348.             if (lbd)

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

  350.             else

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

  352.         }

  353.     }

  354. }

  355. 

  356. 

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

  358. {

  359.     int last = 0;

  360.     int i;

  361.     uint8_t state[CONTEXT_SIZE];

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

  363. 

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

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

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

  367.             last = i;

  368.         }

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

  370. }

  371. 

  372. static void write_quant_tables(RangeCoder *c,

  373.                                int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  374. {

  375.     int i;

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

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

  378. }

  379. 

  380. static void write_header(FFV1Context *f)

  381. {

  382.     uint8_t state[CONTEXT_SIZE];

  383.     int i, j;

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

  385. 

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

  387. 

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

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

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

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

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

  393.                 put_symbol(c, state,

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

  395.         }

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

  397.         if (f->version > 0)

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

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

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

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

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

  403. 

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

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

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

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

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

  409.             put_symbol(c, state,

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

  411.             put_symbol(c, state,

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

  413.             put_symbol(c, state,

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

  415.                        0);

  416.             put_symbol(c, state,

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

  418.                        0);

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

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

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

  422.             }

  423.         }

  424.     }

  425. }

  426. 

  427. static int write_extradata(FFV1Context *f)

  428. {

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

  430.     uint8_t state[CONTEXT_SIZE];

  431.     int i, j, k;

  432.     uint8_t state2[32][CONTEXT_SIZE];

  433.     unsigned v;

  434. 

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

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

  437. 

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

  439.                                     (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;

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

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

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

  443. 

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

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

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

  447.             f->minor_version = 2;

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

  449.     }

  450. 

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

  452.     if (f->ac > 1)

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

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

  455. 

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

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

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

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

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

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

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

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

  464. 

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

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

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

  468. 

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

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

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

  472.                 break;

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

  474.             put_rac(c, state, 1);

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

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

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

  478.                     put_symbol(c, state2[k],

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

  480.                 }

  481.         } else {

  482.             put_rac(c, state, 0);

  483.         }

  484.     }

  485. 

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

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

  488.     }

  489. 

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

  491. 

  492.     v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,

  493.                f->avctx->extradata, f->avctx->extradata_size);

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

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

  496. 

  497.     return 0;

  498. }

  499. 

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

  501. {

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

  503. 

  504.     do {

  505.         changed = 0;

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

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

  508. 

  509. #define COST(old, new)                                      \

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

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

  512. 

  513. #define COST2(old, new)                         \

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

  515. 

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

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

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

  519.                     int j;

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

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

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

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

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

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

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

  527.                     }

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

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

  530.                             stt[j] = i2;

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

  532.                             stt[j] = i;

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

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

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

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

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

  538.                         }

  539.                     }

  540.                     print = changed = 1;

  541.                 }

  542.             }

  543.         }

  544.     } while (changed);

  545.     return print;

  546. }

  547. 

  548. static av_cold int init_slices_state(FFV1Context *f)

  549. {

  550.     int i, ret;

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

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

  553.         if ((ret = ffv1_init_slice_state(f, fs)) < 0)

  554.             return AVERROR(ENOMEM);

  555.     }

  556.     return 0;

  557. }

  558. 

  559. static av_cold int ffv1_encode_init(AVCodecContext *avctx)

  560. {

  561.     FFV1Context *s = avctx->priv_data;

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

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

  564. 

  565.     ffv1_common_init(avctx);

  566. 

  567.     s->version = 0;

  568. 

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

  570.         avctx->slices > 1)

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

  572. 

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

  574.         s->version = 3;

  575.     }

  576. 

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

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

  579.     }

  580. 

  581.     if (s->version >= 2 &&

  582.         avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {

  583.         av_log(avctx, AV_LOG_ERROR,

  584.                "Version %d requested, please set -strict experimental in "

  585.                "order to enable it\n",

  586.                s->version);

  587.         return AVERROR(ENOSYS);

  588.     }

  589. 

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

  591. 

  592.     s->plane_count = 3;

  593.     switch (avctx->pix_fmt) {

  594.     case AV_PIX_FMT_YUV444P9:

  595.     case AV_PIX_FMT_YUV422P9:

  596.     case AV_PIX_FMT_YUV420P9:

  597.         if (!avctx->bits_per_raw_sample)

  598.             s->bits_per_raw_sample = 9;

  599.     case AV_PIX_FMT_YUV444P10:

  600.     case AV_PIX_FMT_YUV420P10:

  601.     case AV_PIX_FMT_YUV422P10:

  602.         s->packed_at_lsb = 1;

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

  604.             s->bits_per_raw_sample = 10;

  605.     case AV_PIX_FMT_GRAY16:

  606.     case AV_PIX_FMT_YUV444P16:

  607.     case AV_PIX_FMT_YUV422P16:

  608.     case AV_PIX_FMT_YUV420P16:

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

  610.             s->bits_per_raw_sample = 16;

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

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

  613.         }

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

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

  616.             return AVERROR_INVALIDDATA;

  617.         }

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

  619.             av_log(avctx, AV_LOG_INFO,

  620.                    "bits_per_raw_sample > 8, forcing coder 1\n");

  621.             s->ac = 2;

  622.         }

  623.         if (!s->ac) {

  624.             av_log(

  625.                 avctx, AV_LOG_ERROR,

  626.                 "bits_per_raw_sample of more than 8 needs -coder 1 currently\n");

  627.             return AVERROR_INVALIDDATA;

  628.         }

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

  630.     case AV_PIX_FMT_GRAY8:

  631.     case AV_PIX_FMT_YUV444P:

  632.     case AV_PIX_FMT_YUV440P:

  633.     case AV_PIX_FMT_YUV422P:

  634.     case AV_PIX_FMT_YUV420P:

  635.     case AV_PIX_FMT_YUV411P:

  636.     case AV_PIX_FMT_YUV410P:

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

  638.         s->colorspace    = 0;

  639.         break;

  640.     case AV_PIX_FMT_YUVA444P:

  641.     case AV_PIX_FMT_YUVA422P:

  642.     case AV_PIX_FMT_YUVA420P:

  643.         s->chroma_planes = 1;

  644.         s->colorspace    = 0;

  645.         s->transparency  = 1;

  646.         break;

  647.     case AV_PIX_FMT_RGB32:

  648.         s->colorspace   = 1;

  649.         s->transparency = 1;

  650.         break;

  651.     case AV_PIX_FMT_GBRP9:

  652.         if (!avctx->bits_per_raw_sample)

  653.             s->bits_per_raw_sample = 9;

  654.     case AV_PIX_FMT_GBRP10:

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

  656.             s->bits_per_raw_sample = 10;

  657.     case AV_PIX_FMT_GBRP16:

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

  659.             s->bits_per_raw_sample = 16;

  660.         else if (!s->bits_per_raw_sample)

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

  662.         s->colorspace    = 1;

  663.         s->chroma_planes = 1;

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

  665.         break;

  666.     default:

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

  668.         return AVERROR_INVALIDDATA;

  669.     }

  670.     if (s->transparency) {

  671.         av_log(

  672.             avctx, AV_LOG_WARNING,

  673.             "Storing alpha plane, this will require a recent FFV1 decoder to playback!\n");

  674.     }

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

  676.         av_log(avctx, AV_LOG_ERROR,

  677.                "Invalid context model %d, valid values are 0 and 1\n",

  678.                avctx->context_model);

  679.         return AVERROR(EINVAL);

  680.     }

  681. 

  682.     if (s->ac > 1)

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

  684.             s->state_transition[i] = ffv1_ver2_state[i];

  685. 

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

  687.         s->quant_table_count = 2;

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

  689.             s->quant_tables[0][0][i] = ffv1_quant11[i];

  690.             s->quant_tables[0][1][i] = ffv1_quant11[i] * 11;

  691.             s->quant_tables[0][2][i] = ffv1_quant11[i] * 11 * 11;

  692.             s->quant_tables[1][0][i] = ffv1_quant11[i];

  693.             s->quant_tables[1][1][i] = ffv1_quant11[i] * 11;

  694.             s->quant_tables[1][2][i] = ffv1_quant5[i]  * 11 * 11;

  695.             s->quant_tables[1][3][i] = ffv1_quant5[i]  *  5 * 11 * 11;

  696.             s->quant_tables[1][4][i] = ffv1_quant5[i]  *  5 *  5 * 11 * 11;

  697.         } else {

  698.             s->quant_tables[0][0][i] = ffv1_quant9_10bit[i];

  699.             s->quant_tables[0][1][i] = ffv1_quant9_10bit[i] * 11;

  700.             s->quant_tables[0][2][i] = ffv1_quant9_10bit[i] * 11 * 11;

  701.             s->quant_tables[1][0][i] = ffv1_quant9_10bit[i];

  702.             s->quant_tables[1][1][i] = ffv1_quant9_10bit[i] * 11;

  703.             s->quant_tables[1][2][i] = ffv1_quant5_10bit[i] * 11 * 11;

  704.             s->quant_tables[1][3][i] = ffv1_quant5_10bit[i] *  5 * 11 * 11;

  705.             s->quant_tables[1][4][i] = ffv1_quant5_10bit[i] *  5 *  5 * 11 * 11;

  706.         }

  707.     }

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

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

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

  711.            sizeof(s->quant_table));

  712. 

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

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

  715. 

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

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

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

  719.     }

  720. 

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

  722.         return ret;

  723. 

  724.     avctx->coded_frame = av_frame_alloc();

  725.     if (!avctx->coded_frame)

  726.         return AVERROR(ENOMEM);

  727. 

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

  729. 

  730.     if (!s->transparency)

  731.         s->plane_count = 2;

  732. 

  733.     av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift,

  734.                                      &s->chroma_v_shift);

  735. 

  736.     s->picture_number = 0;

  737. 

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

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

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

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

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

  743.                 return AVERROR(ENOMEM);

  744.         }

  745.     }

  746.     if (avctx->stats_in) {

  747.         char *p = avctx->stats_in;

  748.         uint8_t best_state[256][256];

  749.         int gob_count = 0;

  750.         char *next;

  751. 

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

  753. 

  754.         for (;; ) {

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

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

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

  758.                     if (next == p) {

  759.                         av_log(avctx, AV_LOG_ERROR,

  760.                                "2Pass file invalid at %d %d [%s]\n", j, i, p);

  761.                         return AVERROR_INVALIDDATA;

  762.                     }

  763.                     p = next;

  764.                 }

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

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

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

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

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

  770.                             if (next == p) {

  771.                                 av_log(avctx, AV_LOG_ERROR,

  772.                                        "2Pass file invalid at %d %d %d %d [%s]\n",

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

  774.                                 return AVERROR_INVALIDDATA;

  775.                             }

  776.                             p = next;

  777.                         }

  778.                 }

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

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

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

  782.                 return AVERROR_INVALIDDATA;

  783.             }

  784.             p = next;

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

  786.                 p++;

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

  788.                 break;

  789.         }

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

  791. 

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

  793. 

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

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

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

  797.                     double p = 128;

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

  799.                         p = 256.0 * s->rc_stat2[i][j][k][1] /

  800.                             (s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1]);

  801.                     }

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

  803.                         best_state[av_clip(round(p), 1, 255)][av_clip((s->rc_stat2[i][j][k][0] +

  804.                                                                        s->rc_stat2[i][j][k][1]) /

  805.                                                                       gob_count, 0, 255)];

  806.                 }

  807.         }

  808.     }

  809. 

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

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

  812.             for (s->num_h_slices = s->num_v_slices;

  813.                  s->num_h_slices < 2 * s->num_v_slices; s->num_h_slices++)

  814.                 if (avctx->slices == s->num_h_slices * s->num_v_slices &&

  815.                     avctx->slices <= 64 || !avctx->slices)

  816.                     goto slices_ok;

  817.         av_log(avctx, AV_LOG_ERROR,

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

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

  820.                avctx->slices);

  821.         return AVERROR(ENOSYS);

  822. slices_ok:

  823.         write_extradata(s);

  824.     }

  825. 

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

  827.         return ret;

  828.     if ((ret = init_slices_state(s)) < 0)

  829.         return ret;

  830. 

  831. #define STATS_OUT_SIZE 1024 * 1024 * 6

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

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

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

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

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

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

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

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

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

  841.                     return AVERROR(ENOMEM);

  842.             }

  843.     }

  844. 

  845.     return 0;

  846. }

  847. 

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

  849. {

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

  851.     uint8_t state[CONTEXT_SIZE];

  852.     int j;

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

  854. 

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

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

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

  858.                0);

  859.     put_symbol(c, state,

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

  861.                0);

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

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

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

  865.     }

  866.     if (!f->avctx->coded_frame->interlaced_frame)

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

  868.     else

  869.         put_symbol(c, state, 1 + !f->avctx->coded_frame->top_field_first, 0);

  870.     put_symbol(c, state, f->avctx->coded_frame->sample_aspect_ratio.num, 0);

  871.     put_symbol(c, state, f->avctx->coded_frame->sample_aspect_ratio.den, 0);

  872. }

  873. 

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

  875. {

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

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

  878.     int width        = fs->slice_width;

  879.     int height       = fs->slice_height;

  880.     int x            = fs->slice_x;

  881.     int y            = fs->slice_y;

  882.     const AVFrame *const p = f->frame;

  883.     const int ps     = (av_pix_fmt_desc_get(c->pix_fmt)->flags & AV_PIX_FMT_FLAG_PLANAR)

  884.                        ? (f->bits_per_raw_sample > 8) + 1

  885.                        : 4;

  886. 

  887.     if (c->coded_frame->key_frame)

  888.         ffv1_clear_slice_state(f, fs);

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

  890.         encode_slice_header(f, fs);

  891.     }

  892.     if (!fs->ac) {

  893.         if (f->version > 2)

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

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

  896.         init_put_bits(&fs->pb, fs->c.bytestream_start + fs->ac_byte_count,

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

  898.     }

  899. 

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

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

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

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

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

  905. 

  906.         encode_plane(fs, p->data[0] + ps * x + y * p->linesize[0],

  907.                      width, height, p->linesize[0], 0);

  908. 

  909.         if (f->chroma_planes) {

  910.             encode_plane(fs, p->data[1] + ps * cx + cy * p->linesize[1],

  911.                          chroma_width, chroma_height, p->linesize[1], 1);

  912.             encode_plane(fs, p->data[2] + ps * cx + cy * p->linesize[2],

  913.                          chroma_width, chroma_height, p->linesize[2], 1);

  914.         }

  915.         if (fs->transparency)

  916.             encode_plane(fs, p->data[3] + ps * x + y * p->linesize[3], width,

  917.                          height, p->linesize[3], 2);

  918.     } else {

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

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

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

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

  923.     }

  924.     emms_c();

  925. 

  926.     return 0;

  927. }

  928. 

  929. static int ffv1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  930.                         const AVFrame *pict, int *got_packet)

  931. {

  932.     FFV1Context *f      = avctx->priv_data;

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

  934.     AVFrame *const p    = avctx->coded_frame;

  935.     int used_count      = 0;

  936.     uint8_t keystate    = 128;

  937.     uint8_t *buf_p;

  938.     int i, ret;

  939. 

  940.     f->frame = pict;

  941. 

  942.     if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height *

  943.                              ((8 * 2 + 1 + 1) * 4) / 8 +

  944.                              FF_MIN_BUFFER_SIZE)) < 0) {

  945.         av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");

  946.         return ret;

  947.     }

  948. 

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

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

  951. 

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

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

  954.         p->key_frame = 1;

  955.         f->gob_count++;

  956.         write_header(f);

  957.     } else {

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

  959.         p->key_frame = 0;

  960.     }

  961. 

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

  963.         int i;

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

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

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

  967.         }

  968.     }

  969. 

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

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

  972.         uint8_t *start  = pkt->data +

  973.                           (pkt->size - used_count) * (int64_t)i / f->slice_count;

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

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

  976.     }

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

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

  979. 

  980.     buf_p = pkt->data;

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

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

  983.         int bytes;

  984. 

  985.         if (fs->ac) {

  986.             uint8_t state = 129;

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

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

  989.         } else {

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

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

  992.         }

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

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

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

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

  997.             AV_WB24(buf_p + bytes, bytes);

  998.             bytes += 3;

  999.         }

  1000.         if (f->ec) {

  1001.             unsigned v;

  1002.             buf_p[bytes++] = 0;

  1003.             v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);

  1004.             AV_WL32(buf_p + bytes, v);

  1005.             bytes += 4;

  1006.         }

  1007.         buf_p += bytes;

  1008.     }

  1009. 

  1010.     if ((avctx->flags & CODEC_FLAG_PASS1) && (f->picture_number & 31) == 0) {

  1011.         int j, k, m;

  1012.         char *p   = avctx->stats_out;

  1013.         char *end = p + STATS_OUT_SIZE;

  1014. 

  1015.         memset(f->rc_stat, 0, sizeof(f->rc_stat));

  1016.         for (i = 0; i < f->quant_table_count; i++)

  1017.             memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));

  1018. 

  1019.         for (j = 0; j < f->slice_count; j++) {

  1020.             FFV1Context *fs = f->slice_context[j];

  1021.             for (i = 0; i < 256; i++) {

  1022.                 f->rc_stat[i][0] += fs->rc_stat[i][0];

  1023.                 f->rc_stat[i][1] += fs->rc_stat[i][1];

  1024.             }

  1025.             for (i = 0; i < f->quant_table_count; i++) {

  1026.                 for (k = 0; k < f->context_count[i]; k++)

  1027.                     for (m = 0; m < 32; m++) {

  1028.                         f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];

  1029.                         f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];

  1030.                     }

  1031.             }

  1032.         }

  1033. 

  1034.         for (j = 0; j < 256; j++) {

  1035.             snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1036.                      f->rc_stat[j][0], f->rc_stat[j][1]);

  1037.             p += strlen(p);

  1038.         }

  1039.         snprintf(p, end - p, "\n");

  1040. 

  1041.         for (i = 0; i < f->quant_table_count; i++) {

  1042.             for (j = 0; j < f->context_count[i]; j++)

  1043.                 for (m = 0; m < 32; m++) {

  1044.                     snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",

  1045.                              f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);

  1046.                     p += strlen(p);

  1047.                 }

  1048.         }

  1049.         snprintf(p, end - p, "%d\n", f->gob_count);

  1050.     } else if (avctx->flags & CODEC_FLAG_PASS1)

  1051.         avctx->stats_out[0] = '\0';

  1052. 

  1053.     f->picture_number++;

  1054.     pkt->size   = buf_p - pkt->data;

  1055.     pkt->flags |= AV_PKT_FLAG_KEY * p->key_frame;

  1056.     *got_packet = 1;

  1057. 

  1058.     return 0;

  1059. }

  1060. 

  1061. static av_cold int ffv1_encode_close(AVCodecContext *avctx)

  1062. {

  1063.     av_frame_free(&avctx->coded_frame);

  1064.     ffv1_close(avctx);

  1065.     return 0;

  1066. }

  1067. 

  1068. #define OFFSET(x) offsetof(FFV1Context, x)

  1069. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  1070. static const AVOption options[] = {

  1071.     { "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_INT,

  1072.              { .i64 = -1 }, -1, 1, VE },

  1073.     { NULL }

  1074. };

  1075. 

  1076. static const AVClass class = {

  1077.     .class_name = "ffv1 encoder",

  1078.     .item_name  = av_default_item_name,

  1079.     .option     = options,

  1080.     .version    = LIBAVUTIL_VERSION_INT,

  1081. };

  1082. 

  1083. static const AVCodecDefault ffv1_defaults[] = {

  1084.     { "coder", "-1" },

  1085.     { NULL },

  1086. };

  1087. 

  1088. AVCodec ff_ffv1_encoder = {

  1089.     .name           = "ffv1",

  1090.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1091.     .type           = AVMEDIA_TYPE_VIDEO,

  1092.     .id             = AV_CODEC_ID_FFV1,

  1093.     .priv_data_size = sizeof(FFV1Context),

  1094.     .init           = ffv1_encode_init,

  1095.     .encode2        = ffv1_encode_frame,

  1096.     .close          = ffv1_encode_close,

  1097.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1098.     .pix_fmts       = (const enum AVPixelFormat[]) {

  1099.         AV_PIX_FMT_YUV420P,   AV_PIX_FMT_YUV422P,   AV_PIX_FMT_YUV444P,

  1100.         AV_PIX_FMT_YUV411P,   AV_PIX_FMT_YUV410P,

  1101.         AV_PIX_FMT_YUV444P9,  AV_PIX_FMT_YUV422P9,  AV_PIX_FMT_YUV420P9,

  1102.         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,

  1103.         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,

  1104.         AV_PIX_FMT_RGB32,

  1105.         AV_PIX_FMT_GBRP9,     AV_PIX_FMT_GBRP10,

  1106.         AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,  AV_PIX_FMT_YUVA444P,

  1107.         AV_PIX_FMT_GRAY16,    AV_PIX_FMT_GRAY8,

  1108.         AV_PIX_FMT_NONE

  1109. 

  1110.     },

  1111.     .defaults       = ffv1_defaults,

  1112.     .priv_class     = &class,

  1113. };