summaryrefslogtreecommitdiff
path: root/libavcodec/proresenc_anatoliy.c
blob: 80ce1359c5a602401be62d93a5505df54bdf3ca3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
/*
 * Apple ProRes encoder
 *
 * Copyright (c) 2011 Anatoliy Wasserman
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * Apple ProRes encoder (Anatoliy Wasserman version)
 * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy)
 */

#include "avcodec.h"
#include "dct.h"
#include "internal.h"
#include "put_bits.h"
#include "bytestream.h"
#include "dsputil.h"

#define DEFAULT_SLICE_MB_WIDTH 8

#define FF_PROFILE_PRORES_PROXY     0
#define FF_PROFILE_PRORES_LT        1
#define FF_PROFILE_PRORES_STANDARD  2
#define FF_PROFILE_PRORES_HQ        3

static const AVProfile profiles[] = {
    { FF_PROFILE_PRORES_PROXY,    "apco"},
    { FF_PROFILE_PRORES_LT,       "apcs"},
    { FF_PROFILE_PRORES_STANDARD, "apcn"},
    { FF_PROFILE_PRORES_HQ,       "apch"},
    { FF_PROFILE_UNKNOWN }
};

static const int qp_start_table[4] = { 4, 1, 1, 1 };
static const int qp_end_table[4]   = { 8, 9, 6, 6 };
static const int bitrate_table[5]  = { 1000, 2100, 3500, 5400 };

static const uint8_t progressive_scan[64] = {
     0,  1,  8,  9,  2,  3, 10, 11,
    16, 17, 24, 25, 18, 19, 26, 27,
     4,  5, 12, 20, 13,  6,  7, 14,
    21, 28, 29, 22, 15, 23, 30, 31,
    32, 33, 40, 48, 41, 34, 35, 42,
    49, 56, 57, 50, 43, 36, 37, 44,
    51, 58, 59, 52, 45, 38, 39, 46,
    53, 60, 61, 54, 47, 55, 62, 63
};

static const uint8_t QMAT_LUMA[4][64] = {
    {
         4,  7,  9, 11, 13, 14, 15, 63,
         7,  7, 11, 12, 14, 15, 63, 63,
         9, 11, 13, 14, 15, 63, 63, 63,
        11, 11, 13, 14, 63, 63, 63, 63,
        11, 13, 14, 63, 63, 63, 63, 63,
        13, 14, 63, 63, 63, 63, 63, 63,
        13, 63, 63, 63, 63, 63, 63, 63,
        63, 63, 63, 63, 63, 63, 63, 63
    }, {
         4,  5,  6,  7,  9, 11, 13, 15,
         5,  5,  7,  8, 11, 13, 15, 17,
         6,  7,  9, 11, 13, 15, 15, 17,
         7,  7,  9, 11, 13, 15, 17, 19,
         7,  9, 11, 13, 14, 16, 19, 23,
         9, 11, 13, 14, 16, 19, 23, 29,
         9, 11, 13, 15, 17, 21, 28, 35,
        11, 13, 16, 17, 21, 28, 35, 41
    }, {
         4,  4,  5,  5,  6,  7,  7,  9,
         4,  4,  5,  6,  7,  7,  9,  9,
         5,  5,  6,  7,  7,  9,  9, 10,
         5,  5,  6,  7,  7,  9,  9, 10,
         5,  6,  7,  7,  8,  9, 10, 12,
         6,  7,  7,  8,  9, 10, 12, 15,
         6,  7,  7,  9, 10, 11, 14, 17,
         7,  7,  9, 10, 11, 14, 17, 21
    }, {
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  5,
         4,  4,  4,  4,  4,  4,  5,  5,
         4,  4,  4,  4,  4,  5,  5,  6,
         4,  4,  4,  4,  5,  5,  6,  7,
         4,  4,  4,  4,  5,  6,  7,  7
    }
};

static const uint8_t QMAT_CHROMA[4][64] = {
    {
         4,  7,  9, 11, 13, 14, 63, 63,
         7,  7, 11, 12, 14, 63, 63, 63,
         9, 11, 13, 14, 63, 63, 63, 63,
        11, 11, 13, 14, 63, 63, 63, 63,
        11, 13, 14, 63, 63, 63, 63, 63,
        13, 14, 63, 63, 63, 63, 63, 63,
        13, 63, 63, 63, 63, 63, 63, 63,
        63, 63, 63, 63, 63, 63, 63, 63
    }, {
         4,  5,  6,  7,  9, 11, 13, 15,
         5,  5,  7,  8, 11, 13, 15, 17,
         6,  7,  9, 11, 13, 15, 15, 17,
         7,  7,  9, 11, 13, 15, 17, 19,
         7,  9, 11, 13, 14, 16, 19, 23,
         9, 11, 13, 14, 16, 19, 23, 29,
         9, 11, 13, 15, 17, 21, 28, 35,
        11, 13, 16, 17, 21, 28, 35, 41
    }, {
         4,  4,  5,  5,  6,  7,  7,  9,
         4,  4,  5,  6,  7,  7,  9,  9,
         5,  5,  6,  7,  7,  9,  9, 10,
         5,  5,  6,  7,  7,  9,  9, 10,
         5,  6,  7,  7,  8,  9, 10, 12,
         6,  7,  7,  8,  9, 10, 12, 15,
         6,  7,  7,  9, 10, 11, 14, 17,
         7,  7,  9, 10, 11, 14, 17, 21
    }, {
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  4,
         4,  4,  4,  4,  4,  4,  4,  5,
         4,  4,  4,  4,  4,  4,  5,  5,
         4,  4,  4,  4,  4,  5,  5,  6,
         4,  4,  4,  4,  5,  5,  6,  7,
         4,  4,  4,  4,  5,  6,  7,  7
    }
};


typedef struct {
    uint8_t* fill_y;
    uint8_t* fill_u;
    uint8_t* fill_v;

    int qmat_luma[16][64];
    int qmat_chroma[16][64];
} ProresContext;

static void encode_codeword(PutBitContext *pb, int val, int codebook)
{
    unsigned int rice_order, exp_order, switch_bits, first_exp, exp, zeros,
            mask;

    /* number of bits to switch between rice and exp golomb */
    switch_bits = codebook & 3;
    rice_order  = codebook >> 5;
    exp_order   = (codebook >> 2) & 7;

    first_exp = ((switch_bits + 1) << rice_order);

    if (val >= first_exp) { /* exp golomb */
        val -= first_exp;
        val += (1 << exp_order);
        exp = av_log2(val);
        zeros = exp - exp_order + switch_bits + 1;
        put_bits(pb, zeros, 0);
        put_bits(pb, exp + 1, val);
    } else if (rice_order) {
        mask = (1 << rice_order) - 1;
        put_bits(pb, (val >> rice_order), 0);
        put_bits(pb, 1, 1);
        put_bits(pb, rice_order, val & mask);
    } else {
        put_bits(pb, val, 0);
        put_bits(pb, 1, 1);
    }
}

#define QSCALE(qmat,ind,val) ((val) / (qmat[ind]))
#define TO_GOLOMB(val) ((val << 1) ^ (val >> 31))
#define DIFF_SIGN(val, sign) ((val >> 31) ^ sign)
#define IS_NEGATIVE(val) (((val >> 31) ^ -1) + 1)
#define TO_GOLOMB2(val,sign) (val==0 ? 0 : (val << 1) + sign)

static av_always_inline int get_level(int val)
{
    int sign = (val >> 31);
    return (val ^ sign) - sign;
}

#define FIRST_DC_CB 0xB8

static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};

static void encode_dc_coeffs(PutBitContext *pb, int16_t *in,
        int blocks_per_slice, int *qmat)
{
    int prev_dc, code;
    int i, sign, idx;
    int new_dc, delta, diff_sign, new_code;

    prev_dc = QSCALE(qmat, 0, in[0] - 16384);
    code = TO_GOLOMB(prev_dc);
    encode_codeword(pb, code, FIRST_DC_CB);

    code = 5; sign = 0; idx = 64;
    for (i = 1; i < blocks_per_slice; i++, idx += 64) {
        new_dc    = QSCALE(qmat, 0, in[idx] - 16384);
        delta     = new_dc - prev_dc;
        diff_sign = DIFF_SIGN(delta, sign);
        new_code  = TO_GOLOMB2(get_level(delta), diff_sign);

        encode_codeword(pb, new_code, dc_codebook[FFMIN(code, 6)]);

        code      = new_code;
        sign      = delta >> 31;
        prev_dc   = new_dc;
    }
}

static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29,
        0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28,
        0x28, 0x28, 0x28, 0x4C };

static void encode_ac_coeffs(AVCodecContext *avctx, PutBitContext *pb,
        int16_t *in, int blocks_per_slice, int *qmat)
{
    int prev_run = 4;
    int prev_level = 2;

    int run = 0, level, code, i, j;
    for (i = 1; i < 64; i++) {
        int indp = progressive_scan[i];
        for (j = 0; j < blocks_per_slice; j++) {
            int val = QSCALE(qmat, indp, in[(j << 6) + indp]);
            if (val) {
                encode_codeword(pb, run, run_to_cb[FFMIN(prev_run, 15)]);

                prev_run   = run;
                run        = 0;
                level      = get_level(val);
                code       = level - 1;

                encode_codeword(pb, code, lev_to_cb[FFMIN(prev_level, 9)]);

                prev_level = level;

                put_bits(pb, 1, IS_NEGATIVE(val));
            } else {
                ++run;
            }
        }
    }
}

static void get(uint8_t *pixels, int stride, int16_t* block)
{
    int16_t *p = (int16_t*)pixels;
    int i, j;

    stride >>= 1;
    for (i = 0; i < 8; i++) {
        for (j = 0; j < 8; j++) {
            block[j] = p[j];
        }
        p += stride;
        block += 8;
    }
}

static void fdct_get(uint8_t *pixels, int stride, int16_t* block)
{
    get(pixels, stride, block);
    ff_jpeg_fdct_islow_10(block);
}

static int encode_slice_plane(AVCodecContext *avctx, int mb_count,
        uint8_t *src, int src_stride, uint8_t *buf, unsigned buf_size,
        int *qmat, int chroma)
{
    DECLARE_ALIGNED(16, int16_t, blocks)[DEFAULT_SLICE_MB_WIDTH << 8], *block;
    int i, blocks_per_slice;
    PutBitContext pb;

    block = blocks;
    for (i = 0; i < mb_count; i++) {
        fdct_get(src,                  src_stride, block + (0 << 6));
        fdct_get(src + 8 * src_stride, src_stride, block + ((2 - chroma) << 6));
        if (!chroma) {
            fdct_get(src + 16,                  src_stride, block + (1 << 6));
            fdct_get(src + 16 + 8 * src_stride, src_stride, block + (3 << 6));
        }

        block += (256 >> chroma);
        src   += (32  >> chroma);
    }

    blocks_per_slice = mb_count << (2 - chroma);
    init_put_bits(&pb, buf, buf_size << 3);

    encode_dc_coeffs(&pb, blocks, blocks_per_slice, qmat);
    encode_ac_coeffs(avctx, &pb, blocks, blocks_per_slice, qmat);

    flush_put_bits(&pb);
    return put_bits_ptr(&pb) - pb.buf;
}

static av_always_inline unsigned encode_slice_data(AVCodecContext *avctx,
        uint8_t *dest_y, uint8_t *dest_u, uint8_t *dest_v, int luma_stride,
        int chroma_stride, unsigned mb_count, uint8_t *buf, unsigned data_size,
        unsigned* y_data_size, unsigned* u_data_size, unsigned* v_data_size,
        int qp)
{
    ProresContext* ctx = avctx->priv_data;

    *y_data_size = encode_slice_plane(avctx, mb_count, dest_y, luma_stride,
            buf, data_size, ctx->qmat_luma[qp - 1], 0);

    if (!(avctx->flags & CODEC_FLAG_GRAY)) {
        *u_data_size = encode_slice_plane(avctx, mb_count, dest_u,
                chroma_stride, buf + *y_data_size, data_size - *y_data_size,
                ctx->qmat_chroma[qp - 1], 1);

        *v_data_size = encode_slice_plane(avctx, mb_count, dest_v,
                chroma_stride, buf + *y_data_size + *u_data_size,
                data_size - *y_data_size - *u_data_size,
                ctx->qmat_chroma[qp - 1], 1);
    }

    return *y_data_size + *u_data_size + *v_data_size;
}

static void subimage_with_fill(uint16_t *src, unsigned x, unsigned y,
        unsigned stride, unsigned width, unsigned height, uint16_t *dst,
        unsigned dst_width, unsigned dst_height)
{

    int box_width = FFMIN(width - x, dst_width);
    int box_height = FFMIN(height - y, dst_height);
    int i, j, src_stride = stride >> 1;
    uint16_t last_pix, *last_line;

    src += y * src_stride + x;
    for (i = 0; i < box_height; ++i) {
        for (j = 0; j < box_width; ++j) {
            dst[j] = src[j];
        }
        last_pix = dst[j - 1];
        for (; j < dst_width; j++)
            dst[j] = last_pix;
        src += src_stride;
        dst += dst_width;
    }
    last_line = dst - dst_width;
    for (; i < dst_height; i++) {
        for (j = 0; j < dst_width; ++j) {
            dst[j] = last_line[j];
        }
        dst += dst_width;
    }
}

static int encode_slice(AVCodecContext *avctx, const AVFrame *pic, int mb_x,
        int mb_y, unsigned mb_count, uint8_t *buf, unsigned data_size,
        int unsafe, int *qp)
{
    int luma_stride, chroma_stride;
    int hdr_size = 6, slice_size;
    uint8_t *dest_y, *dest_u, *dest_v;
    unsigned y_data_size = 0, u_data_size = 0, v_data_size = 0;
    ProresContext* ctx = avctx->priv_data;
    int tgt_bits   = (mb_count * bitrate_table[avctx->profile]) >> 2;
    int low_bytes  = (tgt_bits - (tgt_bits >> 3)) >> 3; // 12% bitrate fluctuation
    int high_bytes = (tgt_bits + (tgt_bits >> 3)) >> 3;

    luma_stride   = pic->linesize[0];
    chroma_stride = pic->linesize[1];

    dest_y = pic->data[0] + (mb_y << 4) * luma_stride   + (mb_x << 5);
    dest_u = pic->data[1] + (mb_y << 4) * chroma_stride + (mb_x << 4);
    dest_v = pic->data[2] + (mb_y << 4) * chroma_stride + (mb_x << 4);

    if (unsafe) {

        subimage_with_fill((uint16_t *) pic->data[0], mb_x << 4, mb_y << 4,
                luma_stride, avctx->width, avctx->height,
                (uint16_t *) ctx->fill_y, mb_count << 4, 16);
        subimage_with_fill((uint16_t *) pic->data[1], mb_x << 3, mb_y << 4,
                chroma_stride, avctx->width >> 1, avctx->height,
                (uint16_t *) ctx->fill_u, mb_count << 3, 16);
        subimage_with_fill((uint16_t *) pic->data[2], mb_x << 3, mb_y << 4,
                chroma_stride, avctx->width >> 1, avctx->height,
                (uint16_t *) ctx->fill_v, mb_count << 3, 16);

        encode_slice_data(avctx, ctx->fill_y, ctx->fill_u, ctx->fill_v,
                mb_count << 5, mb_count << 4, mb_count, buf + hdr_size,
                data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
                *qp);
    } else {
        slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                luma_stride, chroma_stride, mb_count, buf + hdr_size,
                data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
                *qp);

        if (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]) {
            do {
                *qp += 1;
                slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                        luma_stride, chroma_stride, mb_count, buf + hdr_size,
                        data_size - hdr_size, &y_data_size, &u_data_size,
                        &v_data_size, *qp);
            } while (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]);
        } else if (slice_size < low_bytes && *qp
                > qp_start_table[avctx->profile]) {
            do {
                *qp -= 1;
                slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                        luma_stride, chroma_stride, mb_count, buf + hdr_size,
                        data_size - hdr_size, &y_data_size, &u_data_size,
                        &v_data_size, *qp);
            } while (slice_size < low_bytes && *qp > qp_start_table[avctx->profile]);
        }
    }

    buf[0] = hdr_size << 3;
    buf[1] = *qp;
    AV_WB16(buf + 2, y_data_size);
    AV_WB16(buf + 4, u_data_size);

    return hdr_size + y_data_size + u_data_size + v_data_size;
}

static int prores_encode_picture(AVCodecContext *avctx, const AVFrame *pic,
        uint8_t *buf, const int buf_size)
{
    int mb_width = (avctx->width + 15) >> 4;
    int mb_height = (avctx->height + 15) >> 4;
    int hdr_size, sl_size, i;
    int mb_y, sl_data_size, qp;
    int unsafe_bot, unsafe_right;
    uint8_t *sl_data, *sl_data_sizes;
    int slice_per_line = 0, rem = mb_width;

    for (i = av_log2(DEFAULT_SLICE_MB_WIDTH); i >= 0; --i) {
        slice_per_line += rem >> i;
        rem &= (1 << i) - 1;
    }

    qp = qp_start_table[avctx->profile];
    hdr_size = 8; sl_data_size = buf_size - hdr_size;
    sl_data_sizes = buf + hdr_size;
    sl_data = sl_data_sizes + (slice_per_line * mb_height * 2);
    for (mb_y = 0; mb_y < mb_height; mb_y++) {
        int mb_x = 0;
        int slice_mb_count = DEFAULT_SLICE_MB_WIDTH;
        while (mb_x < mb_width) {
            while (mb_width - mb_x < slice_mb_count)
                slice_mb_count >>= 1;

            unsafe_bot = (avctx->height & 0xf) && (mb_y == mb_height - 1);
            unsafe_right = (avctx->width & 0xf) && (mb_x + slice_mb_count == mb_width);

            sl_size = encode_slice(avctx, pic, mb_x, mb_y, slice_mb_count,
                    sl_data, sl_data_size, unsafe_bot || unsafe_right, &qp);

            bytestream_put_be16(&sl_data_sizes, sl_size);
            sl_data           += sl_size;
            sl_data_size      -= sl_size;
            mb_x              += slice_mb_count;
        }
    }

    buf[0] = hdr_size << 3;
    AV_WB32(buf + 1, sl_data - buf);
    AV_WB16(buf + 5, slice_per_line * mb_height);
    buf[7] = av_log2(DEFAULT_SLICE_MB_WIDTH) << 4;

    return sl_data - buf;
}

static int prores_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                               const AVFrame *pict, int *got_packet)
{
    int header_size = 148;
    uint8_t *buf;
    int pic_size, ret;
    int frame_size = FFALIGN(avctx->width, 16) * FFALIGN(avctx->height, 16)*16 + 500 + FF_MIN_BUFFER_SIZE; //FIXME choose tighter limit


    if ((ret = ff_alloc_packet2(avctx, pkt, frame_size + FF_MIN_BUFFER_SIZE)) < 0)
        return ret;

    buf = pkt->data;
    pic_size = prores_encode_picture(avctx, pict, buf + header_size + 8,
            pkt->size - header_size - 8);

    bytestream_put_be32(&buf, pic_size + 8 + header_size);
    bytestream_put_buffer(&buf, "icpf", 4);

    bytestream_put_be16(&buf, header_size);
    bytestream_put_be16(&buf, 0);
    bytestream_put_buffer(&buf, "fmpg", 4);
    bytestream_put_be16(&buf, avctx->width);
    bytestream_put_be16(&buf, avctx->height);
    *buf++ = 0x83; // {10}(422){00}{00}(frame){11}
    *buf++ = 0;
    *buf++ = 2;
    *buf++ = 2;
    *buf++ = 6;
    *buf++ = 32;
    *buf++ = 0;
    *buf++ = 3;

    bytestream_put_buffer(&buf, QMAT_LUMA[avctx->profile],   64);
    bytestream_put_buffer(&buf, QMAT_CHROMA[avctx->profile], 64);

    pkt->flags |= AV_PKT_FLAG_KEY;
    pkt->size = pic_size + 8 + header_size;
    *got_packet = 1;

    return 0;
}

static void scale_mat(const uint8_t* src, int* dst, int scale)
{
    int i;
    for (i = 0; i < 64; i++)
        dst[i] = src[i] * scale;
}

static av_cold int prores_encode_init(AVCodecContext *avctx)
{
    int i;
    ProresContext* ctx = avctx->priv_data;

    if (avctx->pix_fmt != AV_PIX_FMT_YUV422P10) {
        av_log(avctx, AV_LOG_ERROR, "need YUV422P10\n");
        return -1;
    }
    if (avctx->width & 0x1) {
        av_log(avctx, AV_LOG_ERROR,
                "frame width needs to be multiple of 2\n");
        return -1;
    }

    if ((avctx->height & 0xf) || (avctx->width & 0xf)) {
        ctx->fill_y = av_malloc(4 * (DEFAULT_SLICE_MB_WIDTH << 8));
        if (!ctx->fill_y)
            return AVERROR(ENOMEM);
        ctx->fill_u = ctx->fill_y + (DEFAULT_SLICE_MB_WIDTH << 9);
        ctx->fill_v = ctx->fill_u + (DEFAULT_SLICE_MB_WIDTH << 8);
    }

    if (avctx->profile == FF_PROFILE_UNKNOWN) {
        avctx->profile = FF_PROFILE_PRORES_STANDARD;
        av_log(avctx, AV_LOG_INFO,
                "encoding with ProRes standard (apcn) profile\n");

    } else if (avctx->profile < FF_PROFILE_PRORES_PROXY
            || avctx->profile > FF_PROFILE_PRORES_HQ) {
        av_log(
                avctx,
                AV_LOG_ERROR,
                "unknown profile %d, use [0 - apco, 1 - apcs, 2 - apcn (default), 3 - apch]\n",
                avctx->profile);
        return -1;
    }

    avctx->codec_tag = AV_RL32((const uint8_t*)profiles[avctx->profile].name);

    for (i = 1; i <= 16; i++) {
        scale_mat(QMAT_LUMA[avctx->profile]  , ctx->qmat_luma[i - 1]  , i);
        scale_mat(QMAT_CHROMA[avctx->profile], ctx->qmat_chroma[i - 1], i);
    }

    avctx->coded_frame = av_frame_alloc();
    avctx->coded_frame->key_frame = 1;
    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

    return 0;
}

static av_cold int prores_encode_close(AVCodecContext *avctx)
{
    ProresContext* ctx = avctx->priv_data;
    av_freep(&avctx->coded_frame);
    av_freep(&ctx->fill_y);

    return 0;
}

AVCodec ff_prores_aw_encoder = {
    .name           = "prores_aw",
    .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_PRORES,
    .priv_data_size = sizeof(ProresContext),
    .init           = prores_encode_init,
    .close          = prores_encode_close,
    .encode2        = prores_encode_frame,
    .pix_fmts       = (const enum AVPixelFormat[]){AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE},
    .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
    .profiles       = profiles
};

AVCodec ff_prores_encoder = {
    .name           = "prores",
    .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_PRORES,
    .priv_data_size = sizeof(ProresContext),
    .init           = prores_encode_init,
    .close          = prores_encode_close,
    .encode2        = prores_encode_frame,
    .pix_fmts       = (const enum AVPixelFormat[]){AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE},
    .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
    .profiles       = profiles
};