aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/libx265.c
blob: 851f099343c224dd83ed6408125efd0862f81b41 (plain) (blame)
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
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
/*
 * libx265 encoder
 *
 * Copyright (c) 2013-2014 Derek Buitenhuis
 *
 * 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
 */

#if defined(_MSC_VER)
#define X265_API_IMPORTS 1
#endif

#include <x265.h>
#include <float.h>

#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "encode.h"
#include "internal.h"
#include "packet_internal.h"
#include "sei.h"

typedef struct libx265Context {
    const AVClass *class;

    x265_encoder *encoder;
    x265_param   *params;
    const x265_api *api;

    float crf;
    int   cqp;
    int   forced_idr;
    char *preset;
    char *tune;
    char *profile;
    AVDictionary *x265_opts;

    void *sei_data;
    int sei_data_size;
    int udu_sei;

    /**
     * If the encoder does not support ROI then warn the first time we
     * encounter a frame with ROI side data.
     */
    int roi_warned;
} libx265Context;

static int is_keyframe(NalUnitType naltype)
{
    switch (naltype) {
    case NAL_UNIT_CODED_SLICE_BLA_W_LP:
    case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
    case NAL_UNIT_CODED_SLICE_BLA_N_LP:
    case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
    case NAL_UNIT_CODED_SLICE_IDR_N_LP:
    case NAL_UNIT_CODED_SLICE_CRA:
        return 1;
    default:
        return 0;
    }
}

static av_cold int libx265_encode_close(AVCodecContext *avctx)
{
    libx265Context *ctx = avctx->priv_data;

    ctx->api->param_free(ctx->params);
    av_freep(&ctx->sei_data);

    if (ctx->encoder)
        ctx->api->encoder_close(ctx->encoder);

    return 0;
}

static av_cold int libx265_param_parse_float(AVCodecContext *avctx,
                                           const char *key, float value)
{
    libx265Context *ctx = avctx->priv_data;
    char buf[256];

    snprintf(buf, sizeof(buf), "%2.2f", value);
    if (ctx->api->param_parse(ctx->params, key, buf) == X265_PARAM_BAD_VALUE) {
        av_log(avctx, AV_LOG_ERROR, "Invalid value %2.2f for param \"%s\".\n", value, key);
        return AVERROR(EINVAL);
    }

    return 0;
}

static av_cold int libx265_param_parse_int(AVCodecContext *avctx,
                                           const char *key, int value)
{
    libx265Context *ctx = avctx->priv_data;
    char buf[256];

    snprintf(buf, sizeof(buf), "%d", value);
    if (ctx->api->param_parse(ctx->params, key, buf) == X265_PARAM_BAD_VALUE) {
        av_log(avctx, AV_LOG_ERROR, "Invalid value %d for param \"%s\".\n", value, key);
        return AVERROR(EINVAL);
    }

    return 0;
}

static av_cold int libx265_encode_init(AVCodecContext *avctx)
{
    libx265Context *ctx = avctx->priv_data;
    AVCPBProperties *cpb_props = NULL;
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
    int ret;

    ctx->api = x265_api_get(desc->comp[0].depth);
    if (!ctx->api)
        ctx->api = x265_api_get(0);

    ctx->params = ctx->api->param_alloc();
    if (!ctx->params) {
        av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
        return AVERROR(ENOMEM);
    }

    if (ctx->api->param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
        int i;

        av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", ctx->preset, ctx->tune);
        av_log(avctx, AV_LOG_INFO, "Possible presets:");
        for (i = 0; x265_preset_names[i]; i++)
            av_log(avctx, AV_LOG_INFO, " %s", x265_preset_names[i]);

        av_log(avctx, AV_LOG_INFO, "\n");
        av_log(avctx, AV_LOG_INFO, "Possible tunes:");
        for (i = 0; x265_tune_names[i]; i++)
            av_log(avctx, AV_LOG_INFO, " %s", x265_tune_names[i]);

        av_log(avctx, AV_LOG_INFO, "\n");

        return AVERROR(EINVAL);
    }

    ctx->params->frameNumThreads = avctx->thread_count;
    if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
        ctx->params->fpsNum      = avctx->framerate.num;
        ctx->params->fpsDenom    = avctx->framerate.den;
    } else {
        ctx->params->fpsNum      = avctx->time_base.den;
        ctx->params->fpsDenom    = avctx->time_base.num * avctx->ticks_per_frame;
    }
    ctx->params->sourceWidth     = avctx->width;
    ctx->params->sourceHeight    = avctx->height;
    ctx->params->bEnablePsnr     = !!(avctx->flags & AV_CODEC_FLAG_PSNR);
    ctx->params->bOpenGOP        = !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP);

    /* Tune the CTU size based on input resolution. */
    if (ctx->params->sourceWidth < 64 || ctx->params->sourceHeight < 64)
        ctx->params->maxCUSize = 32;
    if (ctx->params->sourceWidth < 32 || ctx->params->sourceHeight < 32)
        ctx->params->maxCUSize = 16;
    if (ctx->params->sourceWidth < 16 || ctx->params->sourceHeight < 16) {
        av_log(avctx, AV_LOG_ERROR, "Image size is too small (%dx%d).\n",
               ctx->params->sourceWidth, ctx->params->sourceHeight);
        return AVERROR(EINVAL);
    }


    ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;

    if (avctx->color_range != AVCOL_RANGE_UNSPECIFIED)
        ctx->params->vui.bEnableVideoFullRangeFlag =
            avctx->color_range == AVCOL_RANGE_JPEG;
    else
        ctx->params->vui.bEnableVideoFullRangeFlag =
            (desc->flags & AV_PIX_FMT_FLAG_RGB) ||
            avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
            avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
            avctx->pix_fmt == AV_PIX_FMT_YUVJ444P;

    if ((avctx->color_primaries <= AVCOL_PRI_SMPTE432 &&
         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) ||
        (avctx->color_trc <= AVCOL_TRC_ARIB_STD_B67 &&
         avctx->color_trc != AVCOL_TRC_UNSPECIFIED) ||
        (avctx->colorspace <= AVCOL_SPC_ICTCP &&
         avctx->colorspace != AVCOL_SPC_UNSPECIFIED)) {

        ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;

        // x265 validates the parameters internally
        ctx->params->vui.colorPrimaries          = avctx->color_primaries;
        ctx->params->vui.transferCharacteristics = avctx->color_trc;
#if X265_BUILD >= 159
        if (avctx->color_trc == AVCOL_TRC_ARIB_STD_B67)
            ctx->params->preferredTransferCharacteristics = ctx->params->vui.transferCharacteristics;
#endif
        ctx->params->vui.matrixCoeffs            = avctx->colorspace;
    }

    // chroma sample location values are to be ignored in case of non-4:2:0
    // according to the specification, so we only write them out in case of
    // 4:2:0 (log2_chroma_{w,h} == 1).
    ctx->params->vui.bEnableChromaLocInfoPresentFlag =
        avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED &&
        desc->log2_chroma_w == 1 && desc->log2_chroma_h == 1;

    if (ctx->params->vui.bEnableChromaLocInfoPresentFlag) {
        ctx->params->vui.chromaSampleLocTypeTopField =
        ctx->params->vui.chromaSampleLocTypeBottomField =
            avctx->chroma_sample_location - 1;
    }

    if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
        char sar[12];
        int sar_num, sar_den;

        av_reduce(&sar_num, &sar_den,
                  avctx->sample_aspect_ratio.num,
                  avctx->sample_aspect_ratio.den, 65535);
        snprintf(sar, sizeof(sar), "%d:%d", sar_num, sar_den);
        if (ctx->api->param_parse(ctx->params, "sar", sar) == X265_PARAM_BAD_VALUE) {
            av_log(avctx, AV_LOG_ERROR, "Invalid SAR: %d:%d.\n", sar_num, sar_den);
            return AVERROR_INVALIDDATA;
        }
    }

    switch (avctx->pix_fmt) {
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUV420P10:
    case AV_PIX_FMT_YUV420P12:
        ctx->params->internalCsp = X265_CSP_I420;
        break;
    case AV_PIX_FMT_YUV422P:
    case AV_PIX_FMT_YUV422P10:
    case AV_PIX_FMT_YUV422P12:
        ctx->params->internalCsp = X265_CSP_I422;
        break;
    case AV_PIX_FMT_GBRP:
    case AV_PIX_FMT_GBRP10:
    case AV_PIX_FMT_GBRP12:
        ctx->params->vui.matrixCoeffs = AVCOL_SPC_RGB;
        ctx->params->vui.bEnableVideoSignalTypePresentFlag  = 1;
        ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;
    case AV_PIX_FMT_YUV444P:
    case AV_PIX_FMT_YUV444P10:
    case AV_PIX_FMT_YUV444P12:
        ctx->params->internalCsp = X265_CSP_I444;
        break;
    case AV_PIX_FMT_GRAY8:
    case AV_PIX_FMT_GRAY10:
    case AV_PIX_FMT_GRAY12:
        if (ctx->api->api_build_number < 85) {
            av_log(avctx, AV_LOG_ERROR,
                   "libx265 version is %d, must be at least 85 for gray encoding.\n",
                   ctx->api->api_build_number);
            return AVERROR_INVALIDDATA;
        }
        ctx->params->internalCsp = X265_CSP_I400;
        break;
    }

    if (ctx->crf >= 0) {
        char crf[6];

        snprintf(crf, sizeof(crf), "%2.2f", ctx->crf);
        if (ctx->api->param_parse(ctx->params, "crf", crf) == X265_PARAM_BAD_VALUE) {
            av_log(avctx, AV_LOG_ERROR, "Invalid crf: %2.2f.\n", ctx->crf);
            return AVERROR(EINVAL);
        }
    } else if (avctx->bit_rate > 0) {
        ctx->params->rc.bitrate         = avctx->bit_rate / 1000;
        ctx->params->rc.rateControlMode = X265_RC_ABR;
    } else if (ctx->cqp >= 0) {
        ret = libx265_param_parse_int(avctx, "qp", ctx->cqp);
        if (ret < 0)
            return ret;
    }

#if X265_BUILD >= 89
    if (avctx->qmin >= 0) {
        ret = libx265_param_parse_int(avctx, "qpmin", avctx->qmin);
        if (ret < 0)
            return ret;
    }
    if (avctx->qmax >= 0) {
        ret = libx265_param_parse_int(avctx, "qpmax", avctx->qmax);
        if (ret < 0)
            return ret;
    }
#endif
    if (avctx->max_qdiff >= 0) {
        ret = libx265_param_parse_int(avctx, "qpstep", avctx->max_qdiff);
        if (ret < 0)
            return ret;
    }
    if (avctx->qblur >= 0) {
        ret = libx265_param_parse_float(avctx, "qblur", avctx->qblur);
        if (ret < 0)
            return ret;
    }
    if (avctx->qcompress >= 0) {
        ret = libx265_param_parse_float(avctx, "qcomp", avctx->qcompress);
        if (ret < 0)
            return ret;
    }
    if (avctx->i_quant_factor >= 0) {
        ret = libx265_param_parse_float(avctx, "ipratio", avctx->i_quant_factor);
        if (ret < 0)
            return ret;
    }
    if (avctx->b_quant_factor >= 0) {
        ret = libx265_param_parse_float(avctx, "pbratio", avctx->b_quant_factor);
        if (ret < 0)
            return ret;
    }

    ctx->params->rc.vbvBufferSize = avctx->rc_buffer_size / 1000;
    ctx->params->rc.vbvMaxBitrate = avctx->rc_max_rate    / 1000;

    cpb_props = ff_add_cpb_side_data(avctx);
    if (!cpb_props)
        return AVERROR(ENOMEM);
    cpb_props->buffer_size = ctx->params->rc.vbvBufferSize * 1000;
    cpb_props->max_bitrate = ctx->params->rc.vbvMaxBitrate * 1000LL;
    cpb_props->avg_bitrate = ctx->params->rc.bitrate       * 1000LL;

    if (!(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
        ctx->params->bRepeatHeaders = 1;

    if (avctx->gop_size >= 0) {
        ret = libx265_param_parse_int(avctx, "keyint", avctx->gop_size);
        if (ret < 0)
            return ret;
    }
    if (avctx->keyint_min > 0) {
        ret = libx265_param_parse_int(avctx, "min-keyint", avctx->keyint_min);
        if (ret < 0)
            return ret;
    }
    if (avctx->max_b_frames >= 0) {
        ret = libx265_param_parse_int(avctx, "bframes", avctx->max_b_frames);
        if (ret < 0)
            return ret;
    }
    if (avctx->refs >= 0) {
        ret = libx265_param_parse_int(avctx, "ref", avctx->refs);
        if (ret < 0)
            return ret;
    }

    {
        AVDictionaryEntry *en = NULL;
        while ((en = av_dict_get(ctx->x265_opts, "", en, AV_DICT_IGNORE_SUFFIX))) {
            int parse_ret = ctx->api->param_parse(ctx->params, en->key, en->value);

            switch (parse_ret) {
            case X265_PARAM_BAD_NAME:
                av_log(avctx, AV_LOG_WARNING,
                      "Unknown option: %s.\n", en->key);
                break;
            case X265_PARAM_BAD_VALUE:
                av_log(avctx, AV_LOG_WARNING,
                      "Invalid value for %s: %s.\n", en->key, en->value);
                break;
            default:
                break;
            }
        }
    }

    if (ctx->params->rc.vbvBufferSize && avctx->rc_initial_buffer_occupancy > 1000 &&
        ctx->params->rc.vbvBufferInit == 0.9) {
        ctx->params->rc.vbvBufferInit = (float)avctx->rc_initial_buffer_occupancy / 1000;
    }

    if (ctx->profile) {
        if (ctx->api->param_apply_profile(ctx->params, ctx->profile) < 0) {
            int i;
            av_log(avctx, AV_LOG_ERROR, "Invalid or incompatible profile set: %s.\n", ctx->profile);
            av_log(avctx, AV_LOG_INFO, "Possible profiles:");
            for (i = 0; x265_profile_names[i]; i++)
                av_log(avctx, AV_LOG_INFO, " %s", x265_profile_names[i]);
            av_log(avctx, AV_LOG_INFO, "\n");
            return AVERROR(EINVAL);
        }
    }

    ctx->encoder = ctx->api->encoder_open(ctx->params);
    if (!ctx->encoder) {
        av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
        libx265_encode_close(avctx);
        return AVERROR_INVALIDDATA;
    }

    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
        x265_nal *nal;
        int nnal;

        avctx->extradata_size = ctx->api->encoder_headers(ctx->encoder, &nal, &nnal);
        if (avctx->extradata_size <= 0) {
            av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
            libx265_encode_close(avctx);
            return AVERROR_INVALIDDATA;
        }

        avctx->extradata = av_malloc(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!avctx->extradata) {
            av_log(avctx, AV_LOG_ERROR,
                   "Cannot allocate HEVC header of size %d.\n", avctx->extradata_size);
            libx265_encode_close(avctx);
            return AVERROR(ENOMEM);
        }

        memcpy(avctx->extradata, nal[0].payload, avctx->extradata_size);
        memset(avctx->extradata + avctx->extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
    }

    return 0;
}

static av_cold int libx265_encode_set_roi(libx265Context *ctx, const AVFrame *frame, x265_picture* pic)
{
    AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST);
    if (sd) {
        if (ctx->params->rc.aqMode == X265_AQ_NONE) {
            if (!ctx->roi_warned) {
                ctx->roi_warned = 1;
                av_log(ctx, AV_LOG_WARNING, "Adaptive quantization must be enabled to use ROI encoding, skipping ROI.\n");
            }
        } else {
            /* 8x8 block when qg-size is 8, 16*16 block otherwise. */
            int mb_size = (ctx->params->rc.qgSize == 8) ? 8 : 16;
            int mbx = (frame->width + mb_size - 1) / mb_size;
            int mby = (frame->height + mb_size - 1) / mb_size;
            int qp_range = 51 + 6 * (pic->bitDepth - 8);
            int nb_rois;
            const AVRegionOfInterest *roi;
            uint32_t roi_size;
            float *qoffsets;         /* will be freed after encode is called. */

            roi = (const AVRegionOfInterest*)sd->data;
            roi_size = roi->self_size;
            if (!roi_size || sd->size % roi_size != 0) {
                av_log(ctx, AV_LOG_ERROR, "Invalid AVRegionOfInterest.self_size.\n");
                return AVERROR(EINVAL);
            }
            nb_rois = sd->size / roi_size;

            qoffsets = av_calloc(mbx * mby, sizeof(*qoffsets));
            if (!qoffsets)
                return AVERROR(ENOMEM);

            // This list must be iterated in reverse because the first
            // region in the list applies when regions overlap.
            for (int i = nb_rois - 1; i >= 0; i--) {
                int startx, endx, starty, endy;
                float qoffset;

                roi = (const AVRegionOfInterest*)(sd->data + roi_size * i);

                starty = FFMIN(mby, roi->top / mb_size);
                endy   = FFMIN(mby, (roi->bottom + mb_size - 1)/ mb_size);
                startx = FFMIN(mbx, roi->left / mb_size);
                endx   = FFMIN(mbx, (roi->right + mb_size - 1)/ mb_size);

                if (roi->qoffset.den == 0) {
                    av_free(qoffsets);
                    av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.qoffset.den must not be zero.\n");
                    return AVERROR(EINVAL);
                }
                qoffset = roi->qoffset.num * 1.0f / roi->qoffset.den;
                qoffset = av_clipf(qoffset * qp_range, -qp_range, +qp_range);

                for (int y = starty; y < endy; y++)
                    for (int x = startx; x < endx; x++)
                        qoffsets[x + y*mbx] = qoffset;
            }

            pic->quantOffsets = qoffsets;
        }
    }
    return 0;
}

static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                const AVFrame *pic, int *got_packet)
{
    libx265Context *ctx = avctx->priv_data;
    x265_picture x265pic;
    x265_picture x265pic_out = { 0 };
    x265_nal *nal;
    uint8_t *dst;
    int pict_type;
    int payload = 0;
    int nnal;
    int ret;
    int i;

    ctx->api->picture_init(ctx->params, &x265pic);

    if (pic) {
        x265_sei *sei = &x265pic.userSEI;
        sei->numPayloads = 0;
        for (i = 0; i < 3; i++) {
           x265pic.planes[i] = pic->data[i];
           x265pic.stride[i] = pic->linesize[i];
        }

        x265pic.pts      = pic->pts;
        x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth;

        x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ?
                                              (ctx->forced_idr ? X265_TYPE_IDR : X265_TYPE_I) :
                            pic->pict_type == AV_PICTURE_TYPE_P ? X265_TYPE_P :
                            pic->pict_type == AV_PICTURE_TYPE_B ? X265_TYPE_B :
                            X265_TYPE_AUTO;

        ret = libx265_encode_set_roi(ctx, pic, &x265pic);
        if (ret < 0)
            return ret;

        if (pic->reordered_opaque) {
            x265pic.userData = av_malloc(sizeof(pic->reordered_opaque));
            if (!x265pic.userData) {
                av_freep(&x265pic.quantOffsets);
                return AVERROR(ENOMEM);
            }

            memcpy(x265pic.userData, &pic->reordered_opaque, sizeof(pic->reordered_opaque));
        }

        if (ctx->udu_sei) {
            for (i = 0; i < pic->nb_side_data; i++) {
                AVFrameSideData *side_data = pic->side_data[i];
                void *tmp;
                x265_sei_payload *sei_payload;

                if (side_data->type != AV_FRAME_DATA_SEI_UNREGISTERED)
                    continue;

                tmp = av_fast_realloc(ctx->sei_data,
                        &ctx->sei_data_size,
                        (sei->numPayloads + 1) * sizeof(*sei_payload));
                if (!tmp) {
                    av_freep(&x265pic.userData);
                    av_freep(&x265pic.quantOffsets);
                    return AVERROR(ENOMEM);
                }
                ctx->sei_data = tmp;
                sei->payloads = ctx->sei_data;
                sei_payload = &sei->payloads[sei->numPayloads];
                sei_payload->payload = side_data->data;
                sei_payload->payloadSize = side_data->size;
                /* Equal to libx265 USER_DATA_UNREGISTERED */
                sei_payload->payloadType = SEI_TYPE_USER_DATA_UNREGISTERED;
                sei->numPayloads++;
            }
        }
    }

    ret = ctx->api->encoder_encode(ctx->encoder, &nal, &nnal,
                                   pic ? &x265pic : NULL, &x265pic_out);

    av_freep(&x265pic.quantOffsets);

    if (ret < 0)
        return AVERROR_EXTERNAL;

    if (!nnal)
        return 0;

    for (i = 0; i < nnal; i++)
        payload += nal[i].sizeBytes;

    ret = ff_get_encode_buffer(avctx, pkt, payload, 0);
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
        return ret;
    }
    dst = pkt->data;

    for (i = 0; i < nnal; i++) {
        memcpy(dst, nal[i].payload, nal[i].sizeBytes);
        dst += nal[i].sizeBytes;

        if (is_keyframe(nal[i].type))
            pkt->flags |= AV_PKT_FLAG_KEY;
    }

    pkt->pts = x265pic_out.pts;
    pkt->dts = x265pic_out.dts;

    switch (x265pic_out.sliceType) {
    case X265_TYPE_IDR:
    case X265_TYPE_I:
        pict_type = AV_PICTURE_TYPE_I;
        break;
    case X265_TYPE_P:
        pict_type = AV_PICTURE_TYPE_P;
        break;
    case X265_TYPE_B:
    case X265_TYPE_BREF:
        pict_type = AV_PICTURE_TYPE_B;
        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "Unknown picture type encountered.\n");
        return AVERROR_EXTERNAL;
    }

#if X265_BUILD >= 130
    if (x265pic_out.sliceType == X265_TYPE_B)
#else
    if (x265pic_out.frameData.sliceType == 'b')
#endif
        pkt->flags |= AV_PKT_FLAG_DISPOSABLE;

    ff_side_data_set_encoder_stats(pkt, x265pic_out.frameData.qp * FF_QP2LAMBDA, NULL, 0, pict_type);

    if (x265pic_out.userData) {
        memcpy(&avctx->reordered_opaque, x265pic_out.userData, sizeof(avctx->reordered_opaque));
        av_freep(&x265pic_out.userData);
    } else
        avctx->reordered_opaque = 0;

    *got_packet = 1;
    return 0;
}

static const enum AVPixelFormat x265_csp_eight[] = {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUVJ420P,
    AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_GBRP,
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_NONE
};

static const enum AVPixelFormat x265_csp_ten[] = {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUVJ420P,
    AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_GBRP,
    AV_PIX_FMT_YUV420P10,
    AV_PIX_FMT_YUV422P10,
    AV_PIX_FMT_YUV444P10,
    AV_PIX_FMT_GBRP10,
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_GRAY10,
    AV_PIX_FMT_NONE
};

static const enum AVPixelFormat x265_csp_twelve[] = {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUVJ420P,
    AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_GBRP,
    AV_PIX_FMT_YUV420P10,
    AV_PIX_FMT_YUV422P10,
    AV_PIX_FMT_YUV444P10,
    AV_PIX_FMT_GBRP10,
    AV_PIX_FMT_YUV420P12,
    AV_PIX_FMT_YUV422P12,
    AV_PIX_FMT_YUV444P12,
    AV_PIX_FMT_GBRP12,
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_GRAY10,
    AV_PIX_FMT_GRAY12,
    AV_PIX_FMT_NONE
};

static av_cold void libx265_encode_init_csp(AVCodec *codec)
{
    if (x265_api_get(12))
        codec->pix_fmts = x265_csp_twelve;
    else if (x265_api_get(10))
        codec->pix_fmts = x265_csp_ten;
    else if (x265_api_get(8))
        codec->pix_fmts = x265_csp_eight;
}

#define OFFSET(x) offsetof(libx265Context, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "crf",         "set the x265 crf",                                                            OFFSET(crf),       AV_OPT_TYPE_FLOAT,  { .dbl = -1 }, -1, FLT_MAX, VE },
    { "qp",          "set the x265 qp",                                                             OFFSET(cqp),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE },
    { "forced-idr",  "if forcing keyframes, force them as IDR frames",                              OFFSET(forced_idr),AV_OPT_TYPE_BOOL,   { .i64 =  0 },  0,       1, VE },
    { "preset",      "set the x265 preset",                                                         OFFSET(preset),    AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
    { "tune",        "set the x265 tune parameter",                                                 OFFSET(tune),      AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
    { "profile",     "set the x265 profile",                                                        OFFSET(profile),   AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
    { "udu_sei",      "Use user data unregistered SEI if available",                                OFFSET(udu_sei),   AV_OPT_TYPE_BOOL,   { .i64 = 0 }, 0, 1, VE },
    { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_DICT,   { 0 }, 0, 0, VE },
    { NULL }
};

static const AVClass class = {
    .class_name = "libx265",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

static const AVCodecDefault x265_defaults[] = {
    { "b", "0" },
    { "bf", "-1" },
    { "g", "-1" },
    { "keyint_min", "-1" },
    { "refs", "-1" },
    { "qmin", "-1" },
    { "qmax", "-1" },
    { "qdiff", "-1" },
    { "qblur", "-1" },
    { "qcomp", "-1" },
    { "i_qfactor", "-1" },
    { "b_qfactor", "-1" },
    { NULL },
};

AVCodec ff_libx265_encoder = {
    .name             = "libx265",
    .long_name        = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_HEVC,
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
                        AV_CODEC_CAP_OTHER_THREADS |
                        AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .init             = libx265_encode_init,
    .init_static_data = libx265_encode_init_csp,
    .encode2          = libx265_encode_frame,
    .close            = libx265_encode_close,
    .priv_data_size   = sizeof(libx265Context),
    .priv_class       = &class,
    .defaults         = x265_defaults,
    .caps_internal    = FF_CODEC_CAP_AUTO_THREADS,
    .wrapper_name     = "libx265",
};