summaryrefslogtreecommitdiff
path: root/libavcodec/crystalhd.c
blob: 503baaae73663f952876895ff79f93a3f615d22b (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
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
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
/*
 * - CrystalHD decoder module -
 *
 * Copyright(C) 2010,2011 Philip Langdale <ffmpeg.philipl@overt.org>
 *
 * 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
 */

/*
 * - Principles of Operation -
 *
 * The CrystalHD decoder operates at the bitstream level - which is an even
 * higher level than the decoding hardware you typically see in modern GPUs.
 * This means it has a very simple interface, in principle. You feed demuxed
 * packets in one end and get decoded picture (fields/frames) out the other.
 *
 * Of course, nothing is ever that simple. Due, at the very least, to b-frame
 * dependencies in the supported formats, the hardware has a delay between
 * when a packet goes in, and when a picture comes out. Furthermore, this delay
 * is not just a function of time, but also one of the dependency on additional
 * frames being fed into the decoder to satisfy the b-frame dependencies.
 *
 * As such, a pipeline will build up that is roughly equivalent to the required
 * DPB for the file being played. If that was all it took, things would still
 * be simple - so, of course, it isn't.
 *
 * The hardware has a way of indicating that a picture is ready to be copied out,
 * but this is unreliable - and sometimes the attempt will still fail so, based
 * on testing, the code will wait until 3 pictures are ready before starting
 * to copy out - and this has the effect of extending the pipeline.
 *
 * Finally, while it is tempting to say that once the decoder starts outputting
 * frames, the software should never fail to return a frame from a decode(),
 * this is a hard assertion to make, because the stream may switch between
 * differently encoded content (number of b-frames, interlacing, etc) which
 * might require a longer pipeline than before. If that happened, you could
 * deadlock trying to retrieve a frame that can't be decoded without feeding
 * in additional packets.
 *
 * As such, the code will return in the event that a picture cannot be copied
 * out, leading to an increase in the length of the pipeline. This in turn,
 * means we have to be sensitive to the time it takes to decode a picture;
 * We do not want to give up just because the hardware needed a little more
 * time to prepare the picture! For this reason, there are delays included
 * in the decode() path that ensure that, under normal conditions, the hardware
 * will only fail to return a frame if it really needs additional packets to
 * complete the decoding.
 *
 * Finally, to be explicit, we do not want the pipeline to grow without bound
 * for two reasons: 1) The hardware can only buffer a finite number of packets,
 * and 2) The client application may not be able to cope with arbitrarily long
 * delays in the video path relative to the audio path. For example. MPlayer
 * can only handle a 20 picture delay (although this is arbitrary, and needs
 * to be extended to fully support the CrystalHD where the delay could be up
 * to 32 pictures - consider PAFF H.264 content with 16 b-frames).
 */

/*****************************************************************************
 * Includes
 ****************************************************************************/

#define _XOPEN_SOURCE 600
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <libcrystalhd/bc_dts_types.h>
#include <libcrystalhd/bc_dts_defs.h>
#include <libcrystalhd/libcrystalhd_if.h>

#include "avcodec.h"
#include "h264.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"

/** Timeout parameter passed to DtsProcOutput() in us */
#define OUTPUT_PROC_TIMEOUT 50
/** Step between fake timestamps passed to hardware in units of 100ns */
#define TIMESTAMP_UNIT 100000
/** Initial value in us of the wait in decode() */
#define BASE_WAIT 10000
/** Increment in us to adjust wait in decode() */
#define WAIT_UNIT 1000


/*****************************************************************************
 * Module private data
 ****************************************************************************/

typedef enum {
    RET_ERROR           = -1,
    RET_OK              = 0,
    RET_COPY_AGAIN      = 1,
    RET_SKIP_NEXT_COPY  = 2,
    RET_COPY_NEXT_FIELD = 3,
} CopyRet;

typedef struct OpaqueList {
    struct OpaqueList *next;
    uint64_t fake_timestamp;
    uint64_t reordered_opaque;
    uint8_t pic_type;
} OpaqueList;

typedef struct {
    AVClass *av_class;
    AVCodecContext *avctx;
    AVFrame pic;
    HANDLE dev;

    uint8_t *orig_extradata;
    uint32_t orig_extradata_size;

    AVBitStreamFilterContext *bsfc;
    AVCodecParserContext *parser;

    uint8_t is_70012;
    uint8_t *sps_pps_buf;
    uint32_t sps_pps_size;
    uint8_t is_nal;
    uint8_t output_ready;
    uint8_t need_second_field;
    uint8_t skip_next_output;
    uint64_t decode_wait;

    uint64_t last_picture;

    OpaqueList *head;
    OpaqueList *tail;

    /* Options */
    uint32_t sWidth;
    uint8_t bframe_bug;
} CHDContext;

static const AVOption options[] = {
    { "crystalhd_downscale_width",
      "Turn on downscaling to the specified width",
      offsetof(CHDContext, sWidth),
      AV_OPT_TYPE_INT, 0, 0, UINT32_MAX,
      AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM, },
    { NULL, },
};


/*****************************************************************************
 * Helper functions
 ****************************************************************************/

static inline BC_MEDIA_SUBTYPE id2subtype(CHDContext *priv, enum AVCodecID id)
{
    switch (id) {
    case AV_CODEC_ID_MPEG4:
        return BC_MSUBTYPE_DIVX;
    case AV_CODEC_ID_MSMPEG4V3:
        return BC_MSUBTYPE_DIVX311;
    case AV_CODEC_ID_MPEG2VIDEO:
        return BC_MSUBTYPE_MPEG2VIDEO;
    case AV_CODEC_ID_VC1:
        return BC_MSUBTYPE_VC1;
    case AV_CODEC_ID_WMV3:
        return BC_MSUBTYPE_WMV3;
    case AV_CODEC_ID_H264:
        return priv->is_nal ? BC_MSUBTYPE_AVC1 : BC_MSUBTYPE_H264;
    default:
        return BC_MSUBTYPE_INVALID;
    }
}

static inline void print_frame_info(CHDContext *priv, BC_DTS_PROC_OUT *output)
{
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tYBuffSz: %u\n", output->YbuffSz);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tYBuffDoneSz: %u\n",
           output->YBuffDoneSz);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tUVBuffDoneSz: %u\n",
           output->UVBuffDoneSz);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tTimestamp: %"PRIu64"\n",
           output->PicInfo.timeStamp);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tPicture Number: %u\n",
           output->PicInfo.picture_number);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tWidth: %u\n",
           output->PicInfo.width);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tHeight: %u\n",
           output->PicInfo.height);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tChroma: 0x%03x\n",
           output->PicInfo.chroma_format);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tPulldown: %u\n",
           output->PicInfo.pulldown);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tFlags: 0x%08x\n",
           output->PicInfo.flags);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrame Rate/Res: %u\n",
           output->PicInfo.frame_rate);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tAspect Ratio: %u\n",
           output->PicInfo.aspect_ratio);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tColor Primaries: %u\n",
           output->PicInfo.colour_primaries);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tMetaData: %u\n",
           output->PicInfo.picture_meta_payload);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tSession Number: %u\n",
           output->PicInfo.sess_num);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tycom: %u\n",
           output->PicInfo.ycom);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tCustom Aspect: %u\n",
           output->PicInfo.custom_aspect_ratio_width_height);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrames to Drop: %u\n",
           output->PicInfo.n_drop);
    av_log(priv->avctx, AV_LOG_VERBOSE, "\tH264 Valid Fields: 0x%08x\n",
           output->PicInfo.other.h264.valid);
}


/*****************************************************************************
 * OpaqueList functions
 ****************************************************************************/

static uint64_t opaque_list_push(CHDContext *priv, uint64_t reordered_opaque,
                                 uint8_t pic_type)
{
    OpaqueList *newNode = av_mallocz(sizeof (OpaqueList));
    if (!newNode) {
        av_log(priv->avctx, AV_LOG_ERROR,
               "Unable to allocate new node in OpaqueList.\n");
        return 0;
    }
    if (!priv->head) {
        newNode->fake_timestamp = TIMESTAMP_UNIT;
        priv->head              = newNode;
    } else {
        newNode->fake_timestamp = priv->tail->fake_timestamp + TIMESTAMP_UNIT;
        priv->tail->next        = newNode;
    }
    priv->tail = newNode;
    newNode->reordered_opaque = reordered_opaque;
    newNode->pic_type = pic_type;

    return newNode->fake_timestamp;
}

/*
 * The OpaqueList is built in decode order, while elements will be removed
 * in presentation order. If frames are reordered, this means we must be
 * able to remove elements that are not the first element.
 *
 * Returned node must be freed by caller.
 */
static OpaqueList *opaque_list_pop(CHDContext *priv, uint64_t fake_timestamp)
{
    OpaqueList *node = priv->head;

    if (!priv->head) {
        av_log(priv->avctx, AV_LOG_ERROR,
               "CrystalHD: Attempted to query non-existent timestamps.\n");
        return NULL;
    }

    /*
     * The first element is special-cased because we have to manipulate
     * the head pointer rather than the previous element in the list.
     */
    if (priv->head->fake_timestamp == fake_timestamp) {
        priv->head = node->next;

        if (!priv->head->next)
            priv->tail = priv->head;

        node->next = NULL;
        return node;
    }

    /*
     * The list is processed at arm's length so that we have the
     * previous element available to rewrite its next pointer.
     */
    while (node->next) {
        OpaqueList *current = node->next;
        if (current->fake_timestamp == fake_timestamp) {
            node->next = current->next;

            if (!node->next)
               priv->tail = node;

            current->next = NULL;
            return current;
        } else {
            node = current;
        }
    }

    av_log(priv->avctx, AV_LOG_VERBOSE,
           "CrystalHD: Couldn't match fake_timestamp.\n");
    return NULL;
}


/*****************************************************************************
 * Video decoder API function definitions
 ****************************************************************************/

static void flush(AVCodecContext *avctx)
{
    CHDContext *priv = avctx->priv_data;

    avctx->has_b_frames     = 0;
    priv->last_picture      = -1;
    priv->output_ready      = 0;
    priv->need_second_field = 0;
    priv->skip_next_output  = 0;
    priv->decode_wait       = BASE_WAIT;

    if (priv->pic.data[0])
        avctx->release_buffer(avctx, &priv->pic);

    /* Flush mode 4 flushes all software and hardware buffers. */
    DtsFlushInput(priv->dev, 4);
}


static av_cold int uninit(AVCodecContext *avctx)
{
    CHDContext *priv = avctx->priv_data;
    HANDLE device;

    device = priv->dev;
    DtsStopDecoder(device);
    DtsCloseDecoder(device);
    DtsDeviceClose(device);

    /*
     * Restore original extradata, so that if the decoder is
     * reinitialised, the bitstream detection and filtering
     * will work as expected.
     */
    if (priv->orig_extradata) {
        av_free(avctx->extradata);
        avctx->extradata = priv->orig_extradata;
        avctx->extradata_size = priv->orig_extradata_size;
        priv->orig_extradata = NULL;
        priv->orig_extradata_size = 0;
    }

    av_parser_close(priv->parser);
    if (priv->bsfc) {
        av_bitstream_filter_close(priv->bsfc);
    }

    av_free(priv->sps_pps_buf);

    if (priv->pic.data[0])
        avctx->release_buffer(avctx, &priv->pic);

    if (priv->head) {
       OpaqueList *node = priv->head;
       while (node) {
          OpaqueList *next = node->next;
          av_free(node);
          node = next;
       }
    }

    return 0;
}


static av_cold int init(AVCodecContext *avctx)
{
    CHDContext* priv;
    BC_STATUS ret;
    BC_INFO_CRYSTAL version;
    BC_INPUT_FORMAT format = {
        .FGTEnable   = FALSE,
        .Progressive = TRUE,
        .OptFlags    = 0x80000000 | vdecFrameRate59_94 | 0x40,
        .width       = avctx->width,
        .height      = avctx->height,
    };

    BC_MEDIA_SUBTYPE subtype;

    uint32_t mode = DTS_PLAYBACK_MODE |
                    DTS_LOAD_FILE_PLAY_FW |
                    DTS_SKIP_TX_CHK_CPB |
                    DTS_PLAYBACK_DROP_RPT_MODE |
                    DTS_SINGLE_THREADED_MODE |
                    DTS_DFLT_RESOLUTION(vdecRESOLUTION_1080p23_976);

    av_log(avctx, AV_LOG_VERBOSE, "CrystalHD Init for %s\n",
           avctx->codec->name);

    avctx->pix_fmt = PIX_FMT_YUYV422;

    /* Initialize the library */
    priv               = avctx->priv_data;
    priv->avctx        = avctx;
    priv->is_nal       = avctx->extradata_size > 0 && *(avctx->extradata) == 1;
    priv->last_picture = -1;
    priv->decode_wait  = BASE_WAIT;

    subtype = id2subtype(priv, avctx->codec->id);
    switch (subtype) {
    case BC_MSUBTYPE_AVC1:
        {
            uint8_t *dummy_p;
            int dummy_int;

            /* Back up the extradata so it can be restored at close time. */
            priv->orig_extradata = av_malloc(avctx->extradata_size);
            if (!priv->orig_extradata) {
                av_log(avctx, AV_LOG_ERROR,
                       "Failed to allocate copy of extradata\n");
                return AVERROR(ENOMEM);
            }
            priv->orig_extradata_size = avctx->extradata_size;
            memcpy(priv->orig_extradata, avctx->extradata, avctx->extradata_size);

            priv->bsfc = av_bitstream_filter_init("h264_mp4toannexb");
            if (!priv->bsfc) {
                av_log(avctx, AV_LOG_ERROR,
                       "Cannot open the h264_mp4toannexb BSF!\n");
                return AVERROR_BSF_NOT_FOUND;
            }
            av_bitstream_filter_filter(priv->bsfc, avctx, NULL, &dummy_p,
                                       &dummy_int, NULL, 0, 0);
        }
        subtype = BC_MSUBTYPE_H264;
        // Fall-through
    case BC_MSUBTYPE_H264:
        format.startCodeSz = 4;
        // Fall-through
    case BC_MSUBTYPE_VC1:
    case BC_MSUBTYPE_WVC1:
    case BC_MSUBTYPE_WMV3:
    case BC_MSUBTYPE_WMVA:
    case BC_MSUBTYPE_MPEG2VIDEO:
    case BC_MSUBTYPE_DIVX:
    case BC_MSUBTYPE_DIVX311:
        format.pMetaData  = avctx->extradata;
        format.metaDataSz = avctx->extradata_size;
        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: Unknown codec name\n");
        return AVERROR(EINVAL);
    }
    format.mSubtype = subtype;

    if (priv->sWidth) {
        format.bEnableScaling = 1;
        format.ScalingParams.sWidth = priv->sWidth;
    }

    /* Get a decoder instance */
    av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: starting up\n");
    // Initialize the Link and Decoder devices
    ret = DtsDeviceOpen(&priv->dev, mode);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: DtsDeviceOpen failed\n");
        goto fail;
    }

    ret = DtsCrystalHDVersion(priv->dev, &version);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_VERBOSE,
               "CrystalHD: DtsCrystalHDVersion failed\n");
        goto fail;
    }
    priv->is_70012 = version.device == 0;

    if (priv->is_70012 &&
        (subtype == BC_MSUBTYPE_DIVX || subtype == BC_MSUBTYPE_DIVX311)) {
        av_log(avctx, AV_LOG_VERBOSE,
               "CrystalHD: BCM70012 doesn't support MPEG4-ASP/DivX/Xvid\n");
        goto fail;
    }

    ret = DtsSetInputFormat(priv->dev, &format);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: SetInputFormat failed\n");
        goto fail;
    }

    ret = DtsOpenDecoder(priv->dev, BC_STREAM_TYPE_ES);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsOpenDecoder failed\n");
        goto fail;
    }

    ret = DtsSetColorSpace(priv->dev, OUTPUT_MODE422_YUY2);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsSetColorSpace failed\n");
        goto fail;
    }
    ret = DtsStartDecoder(priv->dev);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartDecoder failed\n");
        goto fail;
    }
    ret = DtsStartCapture(priv->dev);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartCapture failed\n");
        goto fail;
    }

    if (avctx->codec->id == AV_CODEC_ID_H264) {
        priv->parser = av_parser_init(avctx->codec->id);
        if (!priv->parser)
            av_log(avctx, AV_LOG_WARNING,
                   "Cannot open the h.264 parser! Interlaced h.264 content "
                   "will not be detected reliably.\n");
        priv->parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
    }
    av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Init complete.\n");

    return 0;

 fail:
    uninit(avctx);
    return -1;
}


static inline CopyRet copy_frame(AVCodecContext *avctx,
                                 BC_DTS_PROC_OUT *output,
                                 void *data, int *data_size)
{
    BC_STATUS ret;
    BC_DTS_STATUS decoder_status = { 0, };
    uint8_t trust_interlaced;
    uint8_t interlaced;

    CHDContext *priv = avctx->priv_data;
    int64_t pkt_pts  = AV_NOPTS_VALUE;
    uint8_t pic_type = 0;

    uint8_t bottom_field = (output->PicInfo.flags & VDEC_FLAG_BOTTOMFIELD) ==
                           VDEC_FLAG_BOTTOMFIELD;
    uint8_t bottom_first = !!(output->PicInfo.flags & VDEC_FLAG_BOTTOM_FIRST);

    int width    = output->PicInfo.width;
    int height   = output->PicInfo.height;
    int bwidth;
    uint8_t *src = output->Ybuff;
    int sStride;
    uint8_t *dst;
    int dStride;

    if (output->PicInfo.timeStamp != 0) {
        OpaqueList *node = opaque_list_pop(priv, output->PicInfo.timeStamp);
        if (node) {
            pkt_pts = node->reordered_opaque;
            pic_type = node->pic_type;
            av_free(node);
        } else {
            /*
             * We will encounter a situation where a timestamp cannot be
             * popped if a second field is being returned. In this case,
             * each field has the same timestamp and the first one will
             * cause it to be popped. To keep subsequent calculations
             * simple, pic_type should be set a FIELD value - doesn't
             * matter which, but I chose BOTTOM.
             */
            pic_type = PICT_BOTTOM_FIELD;
        }
        av_log(avctx, AV_LOG_VERBOSE, "output \"pts\": %"PRIu64"\n",
               output->PicInfo.timeStamp);
        av_log(avctx, AV_LOG_VERBOSE, "output picture type %d\n",
               pic_type);
    }

    ret = DtsGetDriverStatus(priv->dev, &decoder_status);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR,
               "CrystalHD: GetDriverStatus failed: %u\n", ret);
       return RET_ERROR;
    }

    /*
     * For most content, we can trust the interlaced flag returned
     * by the hardware, but sometimes we can't. These are the
     * conditions under which we can trust the flag:
     *
     * 1) It's not h.264 content
     * 2) The UNKNOWN_SRC flag is not set
     * 3) We know we're expecting a second field
     * 4) The hardware reports this picture and the next picture
     *    have the same picture number.
     *
     * Note that there can still be interlaced content that will
     * fail this check, if the hardware hasn't decoded the next
     * picture or if there is a corruption in the stream. (In either
     * case a 0 will be returned for the next picture number)
     */
    trust_interlaced = avctx->codec->id != AV_CODEC_ID_H264 ||
                       !(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ||
                       priv->need_second_field ||
                       (decoder_status.picNumFlags & ~0x40000000) ==
                       output->PicInfo.picture_number;

    /*
     * If we got a false negative for trust_interlaced on the first field,
     * we will realise our mistake here when we see that the picture number is that
     * of the previous picture. We cannot recover the frame and should discard the
     * second field to keep the correct number of output frames.
     */
    if (output->PicInfo.picture_number == priv->last_picture && !priv->need_second_field) {
        av_log(avctx, AV_LOG_WARNING,
               "Incorrectly guessed progressive frame. Discarding second field\n");
        /* Returning without providing a picture. */
        return RET_OK;
    }

    interlaced = (output->PicInfo.flags & VDEC_FLAG_INTERLACED_SRC) &&
                 trust_interlaced;

    if (!trust_interlaced && (decoder_status.picNumFlags & ~0x40000000) == 0) {
        av_log(avctx, AV_LOG_VERBOSE,
               "Next picture number unknown. Assuming progressive frame.\n");
    }

    av_log(avctx, AV_LOG_VERBOSE, "Interlaced state: %d | trust_interlaced %d\n",
           interlaced, trust_interlaced);

    if (priv->pic.data[0] && !priv->need_second_field)
        avctx->release_buffer(avctx, &priv->pic);

    priv->need_second_field = interlaced && !priv->need_second_field;

    priv->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
                             FF_BUFFER_HINTS_REUSABLE;
    if (!priv->pic.data[0]) {
        if (avctx->get_buffer(avctx, &priv->pic) < 0) {
            av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
            return RET_ERROR;
        }
    }

    bwidth = av_image_get_linesize(avctx->pix_fmt, width, 0);
    if (priv->is_70012) {
        int pStride;

        if (width <= 720)
            pStride = 720;
        else if (width <= 1280)
            pStride = 1280;
        else pStride = 1920;
        sStride = av_image_get_linesize(avctx->pix_fmt, pStride, 0);
    } else {
        sStride = bwidth;
    }

    dStride = priv->pic.linesize[0];
    dst     = priv->pic.data[0];

    av_log(priv->avctx, AV_LOG_VERBOSE, "CrystalHD: Copying out frame\n");

    if (interlaced) {
        int dY = 0;
        int sY = 0;

        height /= 2;
        if (bottom_field) {
            av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: bottom field\n");
            dY = 1;
        } else {
            av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: top field\n");
            dY = 0;
        }

        for (sY = 0; sY < height; dY++, sY++) {
            memcpy(&(dst[dY * dStride]), &(src[sY * sStride]), bwidth);
            dY++;
        }
    } else {
        av_image_copy_plane(dst, dStride, src, sStride, bwidth, height);
    }

    priv->pic.interlaced_frame = interlaced;
    if (interlaced)
        priv->pic.top_field_first = !bottom_first;

    priv->pic.pkt_pts = pkt_pts;

    if (!priv->need_second_field) {
        *data_size       = sizeof(AVFrame);
        *(AVFrame *)data = priv->pic;
    }

    /*
     * Two types of PAFF content have been observed. One form causes the
     * hardware to return a field pair and the other individual fields,
     * even though the input is always individual fields. We must skip
     * copying on the next decode() call to maintain pipeline length in
     * the first case.
     */
    if (!interlaced && (output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) &&
        (pic_type == PICT_TOP_FIELD || pic_type == PICT_BOTTOM_FIELD)) {
        av_log(priv->avctx, AV_LOG_VERBOSE, "Fieldpair from two packets.\n");
        return RET_SKIP_NEXT_COPY;
    }

    /*
     * The logic here is purely based on empirical testing with samples.
     * If we need a second field, it could come from a second input packet,
     * or it could come from the same field-pair input packet at the current
     * field. In the first case, we should return and wait for the next time
     * round to get the second field, while in the second case, we should
     * ask the decoder for it immediately.
     *
     * Testing has shown that we are dealing with the fieldpair -> two fields
     * case if the VDEC_FLAG_UNKNOWN_SRC is not set or if the input picture
     * type was PICT_FRAME (in this second case, the flag might still be set)
     */
    return priv->need_second_field &&
           (!(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ||
            pic_type == PICT_FRAME) ?
           RET_COPY_NEXT_FIELD : RET_OK;
}


static inline CopyRet receive_frame(AVCodecContext *avctx,
                                    void *data, int *data_size)
{
    BC_STATUS ret;
    BC_DTS_PROC_OUT output = {
        .PicInfo.width  = avctx->width,
        .PicInfo.height = avctx->height,
    };
    CHDContext *priv = avctx->priv_data;
    HANDLE dev       = priv->dev;

    *data_size = 0;

    // Request decoded data from the driver
    ret = DtsProcOutputNoCopy(dev, OUTPUT_PROC_TIMEOUT, &output);
    if (ret == BC_STS_FMT_CHANGE) {
        av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Initial format change\n");
        avctx->width  = output.PicInfo.width;
        avctx->height = output.PicInfo.height;
        switch ( output.PicInfo.aspect_ratio ) {
        case vdecAspectRatioSquare:
            avctx->sample_aspect_ratio = (AVRational) {  1,  1};
            break;
        case vdecAspectRatio12_11:
            avctx->sample_aspect_ratio = (AVRational) { 12, 11};
            break;
        case vdecAspectRatio10_11:
            avctx->sample_aspect_ratio = (AVRational) { 10, 11};
            break;
        case vdecAspectRatio16_11:
            avctx->sample_aspect_ratio = (AVRational) { 16, 11};
            break;
        case vdecAspectRatio40_33:
            avctx->sample_aspect_ratio = (AVRational) { 40, 33};
            break;
        case vdecAspectRatio24_11:
            avctx->sample_aspect_ratio = (AVRational) { 24, 11};
            break;
        case vdecAspectRatio20_11:
            avctx->sample_aspect_ratio = (AVRational) { 20, 11};
            break;
        case vdecAspectRatio32_11:
            avctx->sample_aspect_ratio = (AVRational) { 32, 11};
            break;
        case vdecAspectRatio80_33:
            avctx->sample_aspect_ratio = (AVRational) { 80, 33};
            break;
        case vdecAspectRatio18_11:
            avctx->sample_aspect_ratio = (AVRational) { 18, 11};
            break;
        case vdecAspectRatio15_11:
            avctx->sample_aspect_ratio = (AVRational) { 15, 11};
            break;
        case vdecAspectRatio64_33:
            avctx->sample_aspect_ratio = (AVRational) { 64, 33};
            break;
        case vdecAspectRatio160_99:
            avctx->sample_aspect_ratio = (AVRational) {160, 99};
            break;
        case vdecAspectRatio4_3:
            avctx->sample_aspect_ratio = (AVRational) {  4,  3};
            break;
        case vdecAspectRatio16_9:
            avctx->sample_aspect_ratio = (AVRational) { 16,  9};
            break;
        case vdecAspectRatio221_1:
            avctx->sample_aspect_ratio = (AVRational) {221,  1};
            break;
        }
        return RET_COPY_AGAIN;
    } else if (ret == BC_STS_SUCCESS) {
        int copy_ret = -1;
        if (output.PoutFlags & BC_POUT_FLAGS_PIB_VALID) {
            if (priv->last_picture == -1) {
                /*
                 * Init to one less, so that the incrementing code doesn't
                 * need to be special-cased.
                 */
                priv->last_picture = output.PicInfo.picture_number - 1;
            }

            if (avctx->codec->id == AV_CODEC_ID_MPEG4 &&
                output.PicInfo.timeStamp == 0 && priv->bframe_bug) {
                av_log(avctx, AV_LOG_VERBOSE,
                       "CrystalHD: Not returning packed frame twice.\n");
                priv->last_picture++;
                DtsReleaseOutputBuffs(dev, NULL, FALSE);
                return RET_COPY_AGAIN;
            }

            print_frame_info(priv, &output);

            if (priv->last_picture + 1 < output.PicInfo.picture_number) {
                av_log(avctx, AV_LOG_WARNING,
                       "CrystalHD: Picture Number discontinuity\n");
                /*
                 * Have we lost frames? If so, we need to shrink the
                 * pipeline length appropriately.
                 *
                 * XXX: I have no idea what the semantics of this situation
                 * are so I don't even know if we've lost frames or which
                 * ones.
                 *
                 * In any case, only warn the first time.
                 */
               priv->last_picture = output.PicInfo.picture_number - 1;
            }

            copy_ret = copy_frame(avctx, &output, data, data_size);
            if (*data_size > 0) {
                avctx->has_b_frames--;
                priv->last_picture++;
                av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Pipeline length: %u\n",
                       avctx->has_b_frames);
            }
        } else {
            /*
             * An invalid frame has been consumed.
             */
            av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput succeeded with "
                                        "invalid PIB\n");
            avctx->has_b_frames--;
            copy_ret = RET_OK;
        }
        DtsReleaseOutputBuffs(dev, NULL, FALSE);

        return copy_ret;
    } else if (ret == BC_STS_BUSY) {
        return RET_COPY_AGAIN;
    } else {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput failed %d\n", ret);
        return RET_ERROR;
    }
}


static int decode(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
    BC_STATUS ret;
    BC_DTS_STATUS decoder_status = { 0, };
    CopyRet rec_ret;
    CHDContext *priv   = avctx->priv_data;
    HANDLE dev         = priv->dev;
    uint8_t *in_data   = avpkt->data;
    int len            = avpkt->size;
    int free_data      = 0;
    uint8_t pic_type   = 0;

    av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: decode_frame\n");

    if (avpkt->size == 7 && !priv->bframe_bug) {
        /*
         * The use of a drop frame triggers the bug
         */
        av_log(avctx, AV_LOG_INFO,
               "CrystalHD: Enabling work-around for packed b-frame bug\n");
        priv->bframe_bug = 1;
    } else if (avpkt->size == 8 && priv->bframe_bug) {
        /*
         * Delay frames don't trigger the bug
         */
        av_log(avctx, AV_LOG_INFO,
               "CrystalHD: Disabling work-around for packed b-frame bug\n");
        priv->bframe_bug = 0;
    }

    if (len) {
        int32_t tx_free = (int32_t)DtsTxFreeSize(dev);

        if (priv->parser) {
            int ret = 0;

            if (priv->bsfc) {
                ret = av_bitstream_filter_filter(priv->bsfc, avctx, NULL,
                                                 &in_data, &len,
                                                 avpkt->data, len, 0);
            }
            free_data = ret > 0;

            if (ret >= 0) {
                uint8_t *pout;
                int psize;
                int index;
                H264Context *h = priv->parser->priv_data;

                index = av_parser_parse2(priv->parser, avctx, &pout, &psize,
                                         in_data, len, avctx->pkt->pts,
                                         avctx->pkt->dts, 0);
                if (index < 0) {
                    av_log(avctx, AV_LOG_WARNING,
                           "CrystalHD: Failed to parse h.264 packet to "
                           "detect interlacing.\n");
                } else if (index != len) {
                    av_log(avctx, AV_LOG_WARNING,
                           "CrystalHD: Failed to parse h.264 packet "
                           "completely. Interlaced frames may be "
                           "incorrectly detected.\n");
                } else {
                    av_log(avctx, AV_LOG_VERBOSE,
                           "CrystalHD: parser picture type %d\n",
                           h->s.picture_structure);
                    pic_type = h->s.picture_structure;
                }
            } else {
                av_log(avctx, AV_LOG_WARNING,
                       "CrystalHD: mp4toannexb filter failed to filter "
                       "packet. Interlaced frames may be incorrectly "
                       "detected.\n");
            }
        }

        if (len < tx_free - 1024) {
            /*
             * Despite being notionally opaque, either libcrystalhd or
             * the hardware itself will mangle pts values that are too
             * small or too large. The docs claim it should be in units
             * of 100ns. Given that we're nominally dealing with a black
             * box on both sides, any transform we do has no guarantee of
             * avoiding mangling so we need to build a mapping to values
             * we know will not be mangled.
             */
            uint64_t pts = opaque_list_push(priv, avctx->pkt->pts, pic_type);
            if (!pts) {
                if (free_data) {
                    av_freep(&in_data);
                }
                return AVERROR(ENOMEM);
            }
            av_log(priv->avctx, AV_LOG_VERBOSE,
                   "input \"pts\": %"PRIu64"\n", pts);
            ret = DtsProcInput(dev, in_data, len, pts, 0);
            if (free_data) {
                av_freep(&in_data);
            }
            if (ret == BC_STS_BUSY) {
                av_log(avctx, AV_LOG_WARNING,
                       "CrystalHD: ProcInput returned busy\n");
                usleep(BASE_WAIT);
                return AVERROR(EBUSY);
            } else if (ret != BC_STS_SUCCESS) {
                av_log(avctx, AV_LOG_ERROR,
                       "CrystalHD: ProcInput failed: %u\n", ret);
                return -1;
            }
            avctx->has_b_frames++;
        } else {
            av_log(avctx, AV_LOG_WARNING, "CrystalHD: Input buffer full\n");
            len = 0; // We didn't consume any bytes.
        }
    } else {
        av_log(avctx, AV_LOG_INFO, "CrystalHD: No more input data\n");
    }

    if (priv->skip_next_output) {
        av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Skipping next output.\n");
        priv->skip_next_output = 0;
        avctx->has_b_frames--;
        return len;
    }

    ret = DtsGetDriverStatus(dev, &decoder_status);
    if (ret != BC_STS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "CrystalHD: GetDriverStatus failed\n");
        return -1;
    }

    /*
     * No frames ready. Don't try to extract.
     *
     * Empirical testing shows that ReadyListCount can be a damn lie,
     * and ProcOut still fails when count > 0. The same testing showed
     * that two more iterations were needed before ProcOutput would
     * succeed.
     */
    if (priv->output_ready < 2) {
        if (decoder_status.ReadyListCount != 0)
            priv->output_ready++;
        usleep(BASE_WAIT);
        av_log(avctx, AV_LOG_INFO, "CrystalHD: Filling pipeline.\n");
        return len;
    } else if (decoder_status.ReadyListCount == 0) {
        /*
         * After the pipeline is established, if we encounter a lack of frames
         * that probably means we're not giving the hardware enough time to
         * decode them, so start increasing the wait time at the end of a
         * decode call.
         */
        usleep(BASE_WAIT);
        priv->decode_wait += WAIT_UNIT;
        av_log(avctx, AV_LOG_INFO, "CrystalHD: No frames ready. Returning\n");
        return len;
    }

    do {
        rec_ret = receive_frame(avctx, data, data_size);
        if (rec_ret == RET_OK && *data_size == 0) {
            /*
             * This case is for when the encoded fields are stored
             * separately and we get a separate avpkt for each one. To keep
             * the pipeline stable, we should return nothing and wait for
             * the next time round to grab the second field.
             * H.264 PAFF is an example of this.
             */
            av_log(avctx, AV_LOG_VERBOSE, "Returning after first field.\n");
            avctx->has_b_frames--;
        } else if (rec_ret == RET_COPY_NEXT_FIELD) {
            /*
             * This case is for when the encoded fields are stored in a
             * single avpkt but the hardware returns then separately. Unless
             * we grab the second field before returning, we'll slip another
             * frame in the pipeline and if that happens a lot, we're sunk.
             * So we have to get that second field now.
             * Interlaced mpeg2 and vc1 are examples of this.
             */
            av_log(avctx, AV_LOG_VERBOSE, "Trying to get second field.\n");
            while (1) {
                usleep(priv->decode_wait);
                ret = DtsGetDriverStatus(dev, &decoder_status);
                if (ret == BC_STS_SUCCESS &&
                    decoder_status.ReadyListCount > 0) {
                    rec_ret = receive_frame(avctx, data, data_size);
                    if ((rec_ret == RET_OK && *data_size > 0) ||
                        rec_ret == RET_ERROR)
                        break;
                }
            }
            av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Got second field.\n");
        } else if (rec_ret == RET_SKIP_NEXT_COPY) {
            /*
             * Two input packets got turned into a field pair. Gawd.
             */
            av_log(avctx, AV_LOG_VERBOSE,
                   "Don't output on next decode call.\n");
            priv->skip_next_output = 1;
        }
        /*
         * If rec_ret == RET_COPY_AGAIN, that means that either we just handled
         * a FMT_CHANGE event and need to go around again for the actual frame,
         * we got a busy status and need to try again, or we're dealing with
         * packed b-frames, where the hardware strangely returns the packed
         * p-frame twice. We choose to keep the second copy as it carries the
         * valid pts.
         */
    } while (rec_ret == RET_COPY_AGAIN);
    usleep(priv->decode_wait);
    return len;
}


#if CONFIG_H264_CRYSTALHD_DECODER
static AVClass h264_class = {
    "h264_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_h264_crystalhd_decoder = {
    .name           = "h264_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H264,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &h264_class,
};
#endif

#if CONFIG_MPEG2_CRYSTALHD_DECODER
static AVClass mpeg2_class = {
    "mpeg2_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_mpeg2_crystalhd_decoder = {
    .name           = "mpeg2_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MPEG2VIDEO,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 Video (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &mpeg2_class,
};
#endif

#if CONFIG_MPEG4_CRYSTALHD_DECODER
static AVClass mpeg4_class = {
    "mpeg4_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_mpeg4_crystalhd_decoder = {
    .name           = "mpeg4_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MPEG4,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &mpeg4_class,
};
#endif

#if CONFIG_MSMPEG4_CRYSTALHD_DECODER
static AVClass msmpeg4_class = {
    "msmpeg4_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_msmpeg4_crystalhd_decoder = {
    .name           = "msmpeg4_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MSMPEG4V3,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 Microsoft variant version 3 (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &msmpeg4_class,
};
#endif

#if CONFIG_VC1_CRYSTALHD_DECODER
static AVClass vc1_class = {
    "vc1_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_vc1_crystalhd_decoder = {
    .name           = "vc1_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VC1,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1 (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &vc1_class,
};
#endif

#if CONFIG_WMV3_CRYSTALHD_DECODER
static AVClass wmv3_class = {
    "wmv3_crystalhd",
    av_default_item_name,
    options,
    LIBAVUTIL_VERSION_INT,
};

AVCodec ff_wmv3_crystalhd_decoder = {
    .name           = "wmv3_crystalhd",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_WMV3,
    .priv_data_size = sizeof(CHDContext),
    .init           = init,
    .close          = uninit,
    .decode         = decode,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
    .flush          = flush,
    .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 (CrystalHD acceleration)"),
    .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
    .priv_class     = &wmv3_class,
};
#endif