summaryrefslogtreecommitdiff
path: root/src/plugins/qnx/camera/bbcamerasession.cpp
blob: 523066575d08c9e0bf2206ae42d9b6a8eaca1e05 (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
/****************************************************************************
**
** Copyright (C) 2013 Research In Motion
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "bbcamerasession.h"

#include "bbcameraorientationhandler.h"
#include "bbcameraviewfindersettingscontrol.h"
#include "windowgrabber.h"

#include <QAbstractVideoSurface>
#include <QBuffer>
#include <QDebug>
#include <QImage>
#include <QUrl>
#include <QVideoSurfaceFormat>
#include <qmath.h>

#include <algorithm>

QT_BEGIN_NAMESPACE

static QString errorToString(camera_error_t error)
{
    switch (error) {
    case CAMERA_EOK:
        return QLatin1String("No error");
    case CAMERA_EAGAIN:
        return QLatin1String("Camera unavailable");
    case CAMERA_EINVAL:
        return QLatin1String("Invalid argument");
    case CAMERA_ENODEV:
        return QLatin1String("Camera not found");
    case CAMERA_EMFILE:
        return QLatin1String("File table overflow");
    case CAMERA_EBADF:
        return QLatin1String("Invalid handle passed");
    case CAMERA_EACCESS:
        return QLatin1String("No permission");
    case CAMERA_EBADR:
        return QLatin1String("Invalid file descriptor");
    case CAMERA_ENOENT:
        return QLatin1String("File or directory does not exists");
    case CAMERA_ENOMEM:
        return QLatin1String("Memory allocation failed");
    case CAMERA_EOPNOTSUPP:
        return QLatin1String("Operation not supported");
    case CAMERA_ETIMEDOUT:
        return QLatin1String("Communication timeout");
    case CAMERA_EALREADY:
        return QLatin1String("Operation already in progress");
    case CAMERA_EUNINIT:
        return QLatin1String("Camera library not initialized");
    case CAMERA_EREGFAULT:
        return QLatin1String("Callback registration failed");
    case CAMERA_EMICINUSE:
        return QLatin1String("Microphone in use already");
#ifndef Q_OS_BLACKBERRY_TABLET
    case CAMERA_ENODATA:
        return QLatin1String("Data does not exist");
    case CAMERA_EBUSY:
        return QLatin1String("Camera busy");
    case CAMERA_EDESKTOPCAMERAINUSE:
        return QLatin1String("Desktop camera in use already");
    case CAMERA_ENOSPC:
        return QLatin1String("Disk is full");
    case CAMERA_EPOWERDOWN:
        return QLatin1String("Camera in power down state");
    case CAMERA_3ALOCKED:
        return QLatin1String("3A have been locked");
//  case CAMERA_EVIEWFINDERFROZEN: // not yet available in 10.2 NDK
//      return QLatin1String("Freeze flag set");
#endif
    default:
        return QLatin1String("Unknown error");
    }
}

QDebug operator<<(QDebug debug, camera_error_t error)
{
    debug.nospace() << errorToString(error);
    return debug.space();
}

BbCameraSession::BbCameraSession(QObject *parent)
    : QObject(parent)
    , m_nativeCameraOrientation(0)
    , m_orientationHandler(new BbCameraOrientationHandler(this))
    , m_status(QCamera::UnloadedStatus)
    , m_state(QCamera::UnloadedState)
    , m_captureMode(QCamera::CaptureStillImage)
    , m_device("bb:RearCamera")
    , m_previewIsVideo(true)
    , m_surface(0)
    , m_captureImageDriveMode(QCameraImageCapture::SingleImageCapture)
    , m_lastImageCaptureId(0)
    , m_captureDestination(QCameraImageCapture::CaptureToFile)
    , m_videoState(QMediaRecorder::StoppedState)
    , m_videoStatus(QMediaRecorder::LoadedStatus)
    , m_handle(CAMERA_HANDLE_INVALID)
    , m_windowGrabber(new WindowGrabber(this))
{
    connect(this, SIGNAL(statusChanged(QCamera::Status)), SLOT(updateReadyForCapture()));
    connect(this, SIGNAL(captureModeChanged(QCamera::CaptureModes)), SLOT(updateReadyForCapture()));
    connect(m_orientationHandler, SIGNAL(orientationChanged(int)), SLOT(deviceOrientationChanged(int)));

    connect(m_windowGrabber, SIGNAL(frameGrabbed(QImage, int)), SLOT(viewfinderFrameGrabbed(QImage)));
}

BbCameraSession::~BbCameraSession()
{
    stopViewFinder();
    closeCamera();
}

camera_handle_t BbCameraSession::handle() const
{
    return m_handle;
}

QCamera::State BbCameraSession::state() const
{
    return m_state;
}

void BbCameraSession::setState(QCamera::State state)
{
    if (m_state == state)
        return;

    const QCamera::State previousState = m_state;

    if (previousState == QCamera::UnloadedState) {
        if (state == QCamera::LoadedState) {
            if (openCamera()) {
                m_state = state;
            }
        } else if (state == QCamera::ActiveState) {
            if (openCamera()) {
                QMetaObject::invokeMethod(this, "applyConfiguration", Qt::QueuedConnection);
                m_state = state;
            }
        }
    } else if (previousState == QCamera::LoadedState) {
        if (state == QCamera::UnloadedState) {
            closeCamera();
            m_state = state;
        } else if (state == QCamera::ActiveState) {
            QMetaObject::invokeMethod(this, "applyConfiguration", Qt::QueuedConnection);
            m_state = state;
        }
    } else if (previousState == QCamera::ActiveState) {
        if (state == QCamera::LoadedState) {
            stopViewFinder();
            m_state = state;
        } else if (state == QCamera::UnloadedState) {
            stopViewFinder();
            closeCamera();
            m_state = state;
        }
    }

    if (m_state != previousState)
        emit stateChanged(m_state);
}

QCamera::Status BbCameraSession::status() const
{
    return m_status;
}

QCamera::CaptureModes BbCameraSession::captureMode() const
{
    return m_captureMode;
}

void BbCameraSession::setCaptureMode(QCamera::CaptureModes captureMode)
{
    if (m_captureMode == captureMode)
        return;

    m_captureMode = captureMode;
    emit captureModeChanged(m_captureMode);
}

bool BbCameraSession::isCaptureModeSupported(QCamera::CaptureModes mode) const
{
    if (m_handle == CAMERA_HANDLE_INVALID) {
        // the camera has not been loaded yet via QCamera::load(), so
        // we open it temporarily to peek for the supported capture modes

        camera_unit_t unit = CAMERA_UNIT_REAR;
        if (m_device == cameraIdentifierFront())
            unit = CAMERA_UNIT_FRONT;
        else if (m_device == cameraIdentifierRear())
            unit = CAMERA_UNIT_REAR;
        else if (m_device == cameraIdentifierDesktop())
            unit = CAMERA_UNIT_DESKTOP;

        camera_handle_t handle;
        const camera_error_t result = camera_open(unit, CAMERA_MODE_RW, &handle);
        if (result != CAMERA_EOK)
            return true;

        const bool supported = isCaptureModeSupported(handle, mode);

        camera_close(handle);

        return supported;
    } else {
        return isCaptureModeSupported(m_handle, mode);
    }
}

QByteArray BbCameraSession::cameraIdentifierFront()
{
    return "bb:FrontCamera";
}

QByteArray BbCameraSession::cameraIdentifierRear()
{
    return "bb:RearCamera";
}

QByteArray BbCameraSession::cameraIdentifierDesktop()
{
    return "bb:DesktopCamera";
}

void BbCameraSession::setDevice(const QByteArray &device)
{
    m_device = device;
}

QByteArray BbCameraSession::device() const
{
    return m_device;
}

QAbstractVideoSurface* BbCameraSession::surface() const
{
    return m_surface;
}

void BbCameraSession::setSurface(QAbstractVideoSurface *surface)
{
    QMutexLocker locker(&m_surfaceMutex);

    if (m_surface == surface)
        return;

    m_surface = surface;
}

bool BbCameraSession::isReadyForCapture() const
{
    if (m_captureMode & QCamera::CaptureStillImage)
        return (m_status == QCamera::ActiveStatus);

    if (m_captureMode & QCamera::CaptureVideo)
        return (m_status == QCamera::ActiveStatus);

    return false;
}

QCameraImageCapture::DriveMode BbCameraSession::driveMode() const
{
    return m_captureImageDriveMode;
}

void BbCameraSession::setDriveMode(QCameraImageCapture::DriveMode mode)
{
    m_captureImageDriveMode = mode;
}

/**
 * A helper structure that keeps context data for image capture callbacks.
 */
struct ImageCaptureData
{
    int requestId;
    QString fileName;
    BbCameraSession *session;
};

static void imageCaptureShutterCallback(camera_handle_t handle, void *context)
{
    Q_UNUSED(handle)

    const ImageCaptureData *data = static_cast<ImageCaptureData*>(context);

    // We are inside a worker thread here, so emit imageExposed inside the main thread
    QMetaObject::invokeMethod(data->session, "imageExposed", Qt::QueuedConnection,
                              Q_ARG(int, data->requestId));
}

static void imageCaptureImageCallback(camera_handle_t handle, camera_buffer_t *buffer, void *context)
{
    Q_UNUSED(handle)

    QScopedPointer<ImageCaptureData> data(static_cast<ImageCaptureData*>(context));

    if (buffer->frametype != CAMERA_FRAMETYPE_JPEG) {
        // We are inside a worker thread here, so emit error signal inside the main thread
        QMetaObject::invokeMethod(data->session, "imageCaptureError", Qt::QueuedConnection,
                                  Q_ARG(int, data->requestId),
                                  Q_ARG(QCameraImageCapture::Error, QCameraImageCapture::FormatError),
                                  Q_ARG(QString, BbCameraSession::tr("Camera provides image in unsupported format")));
        return;
    }

    const QByteArray rawData((const char*)buffer->framebuf, buffer->framedesc.jpeg.bufsize);

    QImage image;
    const bool ok = image.loadFromData(rawData, "JPG");
    if (!ok) {
        const QString errorMessage = BbCameraSession::tr("Could not load JPEG data from frame");
        // We are inside a worker thread here, so emit error signal inside the main thread
        QMetaObject::invokeMethod(data->session, "imageCaptureError", Qt::QueuedConnection,
                                  Q_ARG(int, data->requestId),
                                  Q_ARG(QCameraImageCapture::Error, QCameraImageCapture::FormatError),
                                  Q_ARG(QString, errorMessage));
        return;
    }


    // We are inside a worker thread here, so invoke imageCaptured inside the main thread
    QMetaObject::invokeMethod(data->session, "imageCaptured", Qt::QueuedConnection,
                              Q_ARG(int, data->requestId),
                              Q_ARG(QImage, image),
                              Q_ARG(QString, data->fileName));
}

int BbCameraSession::capture(const QString &fileName)
{
    m_lastImageCaptureId++;

    if (!isReadyForCapture()) {
        emit imageCaptureError(m_lastImageCaptureId, QCameraImageCapture::NotReadyError, tr("Camera not ready"));
        return m_lastImageCaptureId;
    }

    if (m_captureImageDriveMode == QCameraImageCapture::SingleImageCapture) {
        // prepare context object for callback
        ImageCaptureData *context = new ImageCaptureData;
        context->requestId = m_lastImageCaptureId;
        context->fileName = fileName;
        context->session = this;

        const camera_error_t result = camera_take_photo(m_handle,
                                                        imageCaptureShutterCallback,
                                                        0,
                                                        0,
                                                        imageCaptureImageCallback,
                                                        context, false);

        if (result != CAMERA_EOK)
            qWarning() << "Unable to take photo:" << result;
    } else {
        // TODO: implement burst mode when available in Qt API
    }

    return m_lastImageCaptureId;
}

void BbCameraSession::cancelCapture()
{
    // BB10 API doesn't provide functionality for that
}

bool BbCameraSession::isCaptureDestinationSupported(QCameraImageCapture::CaptureDestinations destination) const
{
    // capture to buffer, file and both are supported.
    return destination & (QCameraImageCapture::CaptureToFile | QCameraImageCapture::CaptureToBuffer);
}

QCameraImageCapture::CaptureDestinations BbCameraSession::captureDestination() const
{
    return m_captureDestination;
}

void BbCameraSession::setCaptureDestination(QCameraImageCapture::CaptureDestinations destination)
{
    if (m_captureDestination != destination) {
        m_captureDestination = destination;
        emit captureDestinationChanged(m_captureDestination);
    }
}

QList<QSize> BbCameraSession::supportedResolutions(const QImageEncoderSettings&, bool *continuous) const
{
    if (continuous)
        *continuous = false;

    if (m_status == QCamera::UnloadedStatus)
        return QList<QSize>();

    if (m_captureMode & QCamera::CaptureStillImage) {
        return supportedResolutions(QCamera::CaptureStillImage);
    } else if (m_captureMode & QCamera::CaptureVideo) {
        return supportedResolutions(QCamera::CaptureVideo);
    }

    return QList<QSize>();
}

QImageEncoderSettings BbCameraSession::imageSettings() const
{
    return m_imageEncoderSettings;
}

void BbCameraSession::setImageSettings(const QImageEncoderSettings &settings)
{
    m_imageEncoderSettings = settings;
    if (m_imageEncoderSettings.codec().isEmpty())
        m_imageEncoderSettings.setCodec(QLatin1String("jpeg"));
}

QUrl BbCameraSession::outputLocation() const
{
    return QUrl::fromLocalFile(m_videoOutputLocation);
}

bool BbCameraSession::setOutputLocation(const QUrl &location)
{
    m_videoOutputLocation = location.toLocalFile();

    return true;
}

QMediaRecorder::State BbCameraSession::videoState() const
{
    return m_videoState;
}

void BbCameraSession::setVideoState(QMediaRecorder::State state)
{
    if (m_videoState == state)
        return;

    const QMediaRecorder::State previousState = m_videoState;

    if (previousState == QMediaRecorder::StoppedState) {
        if (state == QMediaRecorder::RecordingState) {
            if (startVideoRecording()) {
                m_videoState = state;
            }
        } else if (state == QMediaRecorder::PausedState) {
            // do nothing
        }
    } else if (previousState == QMediaRecorder::RecordingState) {
        if (state == QMediaRecorder::StoppedState) {
            stopVideoRecording();
            m_videoState = state;
        } else if (state == QMediaRecorder::PausedState) {
            //TODO: (pause) not supported by BB10 API yet
        }
    } else if (previousState == QMediaRecorder::PausedState) {
        if (state == QMediaRecorder::StoppedState) {
            stopVideoRecording();
            m_videoState = state;
        } else if (state == QMediaRecorder::RecordingState) {
            //TODO: (resume) not supported by BB10 API yet
        }
    }

    emit videoStateChanged(m_videoState);
}

QMediaRecorder::Status BbCameraSession::videoStatus() const
{
    return m_videoStatus;
}

qint64 BbCameraSession::duration() const
{
    return (m_videoRecordingDuration.isValid() ? m_videoRecordingDuration.elapsed() : 0);
}

void BbCameraSession::applyVideoSettings()
{
    if (m_handle == CAMERA_HANDLE_INVALID)
        return;

    // apply viewfinder configuration
    const QList<QSize> videoOutputResolutions = supportedResolutions(QCamera::CaptureVideo);

    if (!m_videoEncoderSettings.resolution().isValid() || !videoOutputResolutions.contains(m_videoEncoderSettings.resolution()))
        m_videoEncoderSettings.setResolution(videoOutputResolutions.first());

    QSize viewfinderResolution;

    if (m_previewIsVideo) {
        // The viewfinder is responsible for encoding the video frames, so the resolutions must match.
        viewfinderResolution = m_videoEncoderSettings.resolution();
    } else {
        // The frames are encoded separately from the viewfinder, so only the aspect ratio must match.
        const QSize videoResolution = m_videoEncoderSettings.resolution();
        const qreal aspectRatio = static_cast<qreal>(videoResolution.width())/static_cast<qreal>(videoResolution.height());

        QList<QSize> sizes = supportedViewfinderResolutions(QCamera::CaptureVideo);
        std::reverse(sizes.begin(), sizes.end()); // use smallest possible resolution
        foreach (const QSize &size, sizes) {
            // search for viewfinder resolution with the same aspect ratio
            if (qFuzzyCompare(aspectRatio, (static_cast<qreal>(size.width())/static_cast<qreal>(size.height())))) {
                viewfinderResolution = size;
                break;
            }
        }
    }

    Q_ASSERT(viewfinderResolution.isValid());

    const QByteArray windowId = QString().sprintf("qcamera_vf_%p", this).toLatin1();
    m_windowGrabber->setWindowId(windowId);

    const QByteArray windowGroupId = m_windowGrabber->windowGroupId();

    const int rotationAngle = (360 - m_nativeCameraOrientation);

    camera_error_t result = CAMERA_EOK;
    result = camera_set_videovf_property(m_handle,
                                         CAMERA_IMGPROP_WIN_GROUPID, windowGroupId.data(),
                                         CAMERA_IMGPROP_WIN_ID, windowId.data(),
                                         CAMERA_IMGPROP_WIDTH, viewfinderResolution.width(),
                                         CAMERA_IMGPROP_HEIGHT, viewfinderResolution.height(),
                                         CAMERA_IMGPROP_ROTATION, rotationAngle);

    if (result != CAMERA_EOK) {
        qWarning() << "Unable to apply video viewfinder settings:" << result;
        return;
    }

    const QSize resolution = m_videoEncoderSettings.resolution();

#ifndef Q_OS_BLACKBERRY_TABLET
    QString videoCodec = m_videoEncoderSettings.codec();
    if (videoCodec.isEmpty())
        videoCodec = QLatin1String("h264");

    camera_videocodec_t cameraVideoCodec = CAMERA_VIDEOCODEC_H264;
    if (videoCodec == QLatin1String("none"))
        cameraVideoCodec = CAMERA_VIDEOCODEC_NONE;
    else if (videoCodec == QLatin1String("avc1"))
        cameraVideoCodec = CAMERA_VIDEOCODEC_AVC1;
    else if (videoCodec == QLatin1String("h264"))
        cameraVideoCodec = CAMERA_VIDEOCODEC_H264;

    qreal frameRate = m_videoEncoderSettings.frameRate();
    if (frameRate == 0) {
        const QList<qreal> frameRates = supportedFrameRates(QVideoEncoderSettings(), 0);
        if (!frameRates.isEmpty())
            frameRate = frameRates.last();
    }

    QString audioCodec = m_audioEncoderSettings.codec();
    if (audioCodec.isEmpty())
        audioCodec = QLatin1String("aac");

    camera_audiocodec_t cameraAudioCodec = CAMERA_AUDIOCODEC_AAC;
    if (audioCodec == QLatin1String("none"))
        cameraAudioCodec = CAMERA_AUDIOCODEC_NONE;
    else if (audioCodec == QLatin1String("aac"))
        cameraAudioCodec = CAMERA_AUDIOCODEC_AAC;
    else if (audioCodec == QLatin1String("raw"))
        cameraAudioCodec = CAMERA_AUDIOCODEC_RAW;

    result = camera_set_video_property(m_handle,
                                       CAMERA_IMGPROP_WIDTH, resolution.width(),
                                       CAMERA_IMGPROP_HEIGHT, resolution.height(),
                                       CAMERA_IMGPROP_ROTATION, rotationAngle,
                                       CAMERA_IMGPROP_VIDEOCODEC, cameraVideoCodec,
                                       CAMERA_IMGPROP_AUDIOCODEC, cameraAudioCodec);
#else
    result = camera_set_video_property(m_handle,
                                       CAMERA_IMGPROP_WIDTH, resolution.width(),
                                       CAMERA_IMGPROP_HEIGHT, resolution.height());
#endif

    if (result != CAMERA_EOK) {
        qWarning() << "Unable to apply video settings:" << result;
        emit videoError(QMediaRecorder::ResourceError, tr("Unable to apply video settings"));
    }
}

QList<QSize> BbCameraSession::supportedResolutions(const QVideoEncoderSettings &settings, bool *continuous) const
{
    Q_UNUSED(settings);

    if (continuous)
        *continuous = false;

    return supportedResolutions(QCamera::CaptureVideo);
}

QList<qreal> BbCameraSession::supportedFrameRates(const QVideoEncoderSettings &settings, bool *continuous) const
{
    Q_UNUSED(settings);

    if (m_handle == CAMERA_HANDLE_INVALID)
        return QList<qreal>();

    int supported = 0;
    double rates[20];
    bool maxmin = false;

    /**
     * Since in current version of the BB10 platform the video viewfinder encodes the video frames, we use
     * the values as returned by camera_get_video_vf_framerates().
     */
    const camera_error_t result = camera_get_video_vf_framerates(m_handle, 20, &supported, rates, &maxmin);
    if (result != CAMERA_EOK) {
        qWarning() << "Unable to retrieve supported viewfinder framerates:" << result;
        return QList<qreal>();
    }

    QList<qreal> frameRates;
    for (int i = 0; i < supported; ++i)
        frameRates << rates[i];

    if (continuous)
        *continuous = maxmin;

    return frameRates;
}

QVideoEncoderSettings BbCameraSession::videoSettings() const
{
    return m_videoEncoderSettings;
}

void BbCameraSession::setVideoSettings(const QVideoEncoderSettings &settings)
{
    m_videoEncoderSettings = settings;
}

QAudioEncoderSettings BbCameraSession::audioSettings() const
{
    return m_audioEncoderSettings;
}

void BbCameraSession::setAudioSettings(const QAudioEncoderSettings &settings)
{
    m_audioEncoderSettings = settings;
}

void BbCameraSession::updateReadyForCapture()
{
    emit readyForCaptureChanged(isReadyForCapture());
}

void BbCameraSession::imageCaptured(int requestId, const QImage &rawImage, const QString &fileName)
{
    QTransform transform;

    // subtract out the native rotation
    transform.rotate(m_nativeCameraOrientation);

    // subtract out the current device orientation
    if (m_device == cameraIdentifierRear())
        transform.rotate(360 - m_orientationHandler->orientation());
    else
        transform.rotate(m_orientationHandler->orientation());

    const QImage image = rawImage.transformed(transform);

    // Generate snap preview as downscaled image
    {
        QSize previewSize = image.size();
        int downScaleSteps = 0;
        while (previewSize.width() > 800 && downScaleSteps < 8) {
            previewSize.rwidth() /= 2;
            previewSize.rheight() /= 2;
            downScaleSteps++;
        }

        const QImage snapPreview = image.scaled(previewSize);

        emit imageCaptured(requestId, snapPreview);
    }

    if (m_captureDestination & QCameraImageCapture::CaptureToBuffer) {
        QVideoFrame frame(image);

        emit imageAvailable(requestId, frame);
    }

    if (m_captureDestination & QCameraImageCapture::CaptureToFile) {
        const QString actualFileName = m_mediaStorageLocation.generateFileName(fileName,
                                                                               QCamera::CaptureStillImage,
                                                                               QLatin1String("IMG_"),
                                                                               QLatin1String("jpg"));

        QFile file(actualFileName);
        if (file.open(QFile::WriteOnly)) {
            if (image.save(&file, "JPG")) {
                emit imageSaved(requestId, actualFileName);
            } else {
                emit imageCaptureError(requestId, QCameraImageCapture::OutOfSpaceError, file.errorString());
            }
        } else {
            const QString errorMessage = tr("Could not open destination file:\n%1").arg(actualFileName);
            emit imageCaptureError(requestId, QCameraImageCapture::ResourceError, errorMessage);
        }
    }
}

void BbCameraSession::handleVideoRecordingPaused()
{
    //TODO: implement once BB10 API supports pausing a video
}

void BbCameraSession::handleVideoRecordingResumed()
{
    if (m_videoStatus == QMediaRecorder::StartingStatus) {
        m_videoStatus = QMediaRecorder::RecordingStatus;
        emit videoStatusChanged(m_videoStatus);

        m_videoRecordingDuration.restart();
    }
}

void BbCameraSession::deviceOrientationChanged(int angle)
{
    if (m_handle != CAMERA_HANDLE_INVALID)
        camera_set_device_orientation(m_handle, angle);
}

void BbCameraSession::handleCameraPowerUp()
{
    stopViewFinder();
    startViewFinder();
}

void BbCameraSession::viewfinderFrameGrabbed(const QImage &image)
{
    QTransform transform;

    // subtract out the native rotation
    transform.rotate(m_nativeCameraOrientation);

    // subtract out the current device orientation
    if (m_device == cameraIdentifierRear())
        transform.rotate(360 - m_orientationHandler->viewfinderOrientation());
    else
        transform.rotate(m_orientationHandler->viewfinderOrientation());

    QImage frame = image.copy().transformed(transform);

    QMutexLocker locker(&m_surfaceMutex);
    if (m_surface) {
        if (frame.size() != m_surface->surfaceFormat().frameSize()) {
            m_surface->stop();
            m_surface->start(QVideoSurfaceFormat(frame.size(), QVideoFrame::Format_ARGB32));
        }

        QVideoFrame videoFrame(frame);

        m_surface->present(videoFrame);
    }
}

bool BbCameraSession::openCamera()
{
    if (m_handle != CAMERA_HANDLE_INVALID) // camera is already open
        return true;

    m_status = QCamera::LoadingStatus;
    emit statusChanged(m_status);

    camera_unit_t unit = CAMERA_UNIT_REAR;
    if (m_device == cameraIdentifierFront())
        unit = CAMERA_UNIT_FRONT;
    else if (m_device == cameraIdentifierRear())
        unit = CAMERA_UNIT_REAR;
    else if (m_device == cameraIdentifierDesktop())
        unit = CAMERA_UNIT_DESKTOP;

    camera_error_t result = camera_open(unit, CAMERA_MODE_RW, &m_handle);
    if (result != CAMERA_EOK) {
        m_handle = CAMERA_HANDLE_INVALID;
        m_status = QCamera::UnloadedStatus;
        emit statusChanged(m_status);

        qWarning() << "Unable to open camera:" << result;
        emit error(QCamera::CameraError, tr("Unable to open camera"));
        return false;
    }

    result = camera_get_native_orientation(m_handle, &m_nativeCameraOrientation);
    if (result != CAMERA_EOK) {
        qWarning() << "Unable to retrieve native camera orientation:" << result;
        emit error(QCamera::CameraError, tr("Unable to retrieve native camera orientation"));
        return false;
    }

    m_previewIsVideo = camera_has_feature(m_handle, CAMERA_FEATURE_PREVIEWISVIDEO);

    m_status = QCamera::LoadedStatus;
    emit statusChanged(m_status);

    emit cameraOpened();

    return true;
}

void BbCameraSession::closeCamera()
{
    if (m_handle == CAMERA_HANDLE_INVALID) // camera is closed already
        return;

    m_status = QCamera::UnloadingStatus;
    emit statusChanged(m_status);

    const camera_error_t result = camera_close(m_handle);
    if (result != CAMERA_EOK) {
        m_status = QCamera::LoadedStatus;
        emit statusChanged(m_status);

        qWarning() << "Unable to close camera:" << result;
        emit error(QCamera::CameraError, tr("Unable to close camera"));
        return;
    }

    m_handle = CAMERA_HANDLE_INVALID;

    m_status = QCamera::UnloadedStatus;
    emit statusChanged(m_status);
}

static void viewFinderStatusCallback(camera_handle_t handle, camera_devstatus_t status, uint16_t value, void *context)
{
    Q_UNUSED(handle)

    if (status == CAMERA_STATUS_FOCUS_CHANGE) {
        BbCameraSession *session = static_cast<BbCameraSession*>(context);
        QMetaObject::invokeMethod(session, "focusStatusChanged", Qt::QueuedConnection, Q_ARG(int, value));
        return;
    }
#ifndef Q_OS_BLACKBERRY_TABLET
    else if (status == CAMERA_STATUS_POWERUP) {
        BbCameraSession *session = static_cast<BbCameraSession*>(context);
        QMetaObject::invokeMethod(session, "handleCameraPowerUp", Qt::QueuedConnection);
    }
#endif
}

bool BbCameraSession::startViewFinder()
{
    m_status = QCamera::StartingStatus;
    emit statusChanged(m_status);

    QSize viewfinderResolution;
    camera_error_t result = CAMERA_EOK;
    if (m_captureMode & QCamera::CaptureStillImage) {
        result = camera_start_photo_viewfinder(m_handle, 0, viewFinderStatusCallback, this);
        viewfinderResolution = currentViewfinderResolution(QCamera::CaptureStillImage);
    } else if (m_captureMode & QCamera::CaptureVideo) {
        result = camera_start_video_viewfinder(m_handle, 0, viewFinderStatusCallback, this);
        viewfinderResolution = currentViewfinderResolution(QCamera::CaptureVideo);
    }

    if (result != CAMERA_EOK) {
        qWarning() << "Unable to start viewfinder:" << result;
        return false;
    }

    const int angle = m_orientationHandler->viewfinderOrientation();

    const QSize rotatedSize = ((angle == 0 || angle == 180) ? viewfinderResolution
                                                            : viewfinderResolution.transposed());

    m_surfaceMutex.lock();
    if (m_surface) {
        const bool ok = m_surface->start(QVideoSurfaceFormat(rotatedSize, QVideoFrame::Format_ARGB32));
        if (!ok)
            qWarning() << "Unable to start camera viewfinder surface";
    }
    m_surfaceMutex.unlock();

    m_status = QCamera::ActiveStatus;
    emit statusChanged(m_status);

    return true;
}

void BbCameraSession::stopViewFinder()
{
    m_windowGrabber->stop();

    m_status = QCamera::StoppingStatus;
    emit statusChanged(m_status);

    m_surfaceMutex.lock();
    if (m_surface) {
        m_surface->stop();
    }
    m_surfaceMutex.unlock();

    camera_error_t result = CAMERA_EOK;
    if (m_captureMode & QCamera::CaptureStillImage)
        result = camera_stop_photo_viewfinder(m_handle);
    else if (m_captureMode & QCamera::CaptureVideo)
        result = camera_stop_video_viewfinder(m_handle);

    if (result != CAMERA_EOK) {
        qWarning() << "Unable to stop viewfinder:" << result;
        return;
    }

    m_status = QCamera::LoadedStatus;
    emit statusChanged(m_status);
}

void BbCameraSession::applyConfiguration()
{
    if (m_captureMode & QCamera::CaptureStillImage) {
        const QList<QSize> photoOutputResolutions = supportedResolutions(QCamera::CaptureStillImage);

        if (!m_imageEncoderSettings.resolution().isValid() || !photoOutputResolutions.contains(m_imageEncoderSettings.resolution()))
            m_imageEncoderSettings.setResolution(photoOutputResolutions.first());

        const QSize photoResolution = m_imageEncoderSettings.resolution();
        const qreal aspectRatio = static_cast<qreal>(photoResolution.width())/static_cast<qreal>(photoResolution.height());

        // apply viewfinder configuration
        QSize viewfinderResolution;
        QList<QSize> sizes = supportedViewfinderResolutions(QCamera::CaptureStillImage);
        std::reverse(sizes.begin(), sizes.end()); // use smallest possible resolution
        foreach (const QSize &size, sizes) {
            // search for viewfinder resolution with the same aspect ratio
            if (qFuzzyCompare(aspectRatio, (static_cast<qreal>(size.width())/static_cast<qreal>(size.height())))) {
                viewfinderResolution = size;
                break;
            }
        }

        Q_ASSERT(viewfinderResolution.isValid());

        const QByteArray windowId = QString().sprintf("qcamera_vf_%p", this).toLatin1();
        m_windowGrabber->setWindowId(windowId);

        const QByteArray windowGroupId = m_windowGrabber->windowGroupId();

        camera_error_t result = camera_set_photovf_property(m_handle,
                                                            CAMERA_IMGPROP_WIN_GROUPID, windowGroupId.data(),
                                                            CAMERA_IMGPROP_WIN_ID, windowId.data(),
                                                            CAMERA_IMGPROP_WIDTH, viewfinderResolution.width(),
                                                            CAMERA_IMGPROP_HEIGHT, viewfinderResolution.height(),
                                                            CAMERA_IMGPROP_FORMAT, CAMERA_FRAMETYPE_NV12,
                                                            CAMERA_IMGPROP_ROTATION, 360 - m_nativeCameraOrientation);

        if (result != CAMERA_EOK) {
            qWarning() << "Unable to apply photo viewfinder settings:" << result;
            return;
        }


        int jpegQuality = 100;
        switch (m_imageEncoderSettings.quality()) {
        case QMultimedia::VeryLowQuality:
            jpegQuality = 20;
            break;
        case QMultimedia::LowQuality:
            jpegQuality = 40;
            break;
        case QMultimedia::NormalQuality:
            jpegQuality = 60;
            break;
        case QMultimedia::HighQuality:
            jpegQuality = 80;
            break;
        case QMultimedia::VeryHighQuality:
            jpegQuality = 100;
            break;
        }

        // apply photo configuration
        result = camera_set_photo_property(m_handle,
                                           CAMERA_IMGPROP_WIDTH, photoResolution.width(),
                                           CAMERA_IMGPROP_HEIGHT, photoResolution.height(),
                                           CAMERA_IMGPROP_JPEGQFACTOR, jpegQuality,
                                           CAMERA_IMGPROP_ROTATION, 360 - m_nativeCameraOrientation);

        if (result != CAMERA_EOK) {
            qWarning() << "Unable to apply photo settings:" << result;
            return;
        }

    } else if (m_captureMode & QCamera::CaptureVideo) {
        applyVideoSettings();
    }

    startViewFinder();
}

static void videoRecordingStatusCallback(camera_handle_t handle, camera_devstatus_t status, uint16_t value, void *context)
{
    Q_UNUSED(handle)
    Q_UNUSED(value)

#ifndef Q_OS_BLACKBERRY_TABLET
    if (status == CAMERA_STATUS_VIDEO_PAUSE) {
        BbCameraSession *session = static_cast<BbCameraSession*>(context);
        QMetaObject::invokeMethod(session, "handleVideoRecordingPaused", Qt::QueuedConnection);
    } else if (status == CAMERA_STATUS_VIDEO_RESUME) {
        BbCameraSession *session = static_cast<BbCameraSession*>(context);
        QMetaObject::invokeMethod(session, "handleVideoRecordingResumed", Qt::QueuedConnection);
    }
#endif
}

bool BbCameraSession::startVideoRecording()
{
    m_videoRecordingDuration.invalidate();

    m_videoStatus = QMediaRecorder::StartingStatus;
    emit videoStatusChanged(m_videoStatus);

    if (m_videoOutputLocation.isEmpty())
        m_videoOutputLocation = m_mediaStorageLocation.generateFileName(QLatin1String("VID_"), m_mediaStorageLocation.defaultDir(QCamera::CaptureVideo), QLatin1String("mp4"));

    emit actualLocationChanged(m_videoOutputLocation);

    const camera_error_t result = camera_start_video(m_handle, QFile::encodeName(m_videoOutputLocation), 0, videoRecordingStatusCallback, this);
    if (result != CAMERA_EOK) {
        m_videoStatus = QMediaRecorder::LoadedStatus;
        emit videoStatusChanged(m_videoStatus);

        emit videoError(QMediaRecorder::ResourceError, tr("Unable to start video recording"));
        return false;
    }

    return true;
}

void BbCameraSession::stopVideoRecording()
{
    m_videoStatus = QMediaRecorder::FinalizingStatus;
    emit videoStatusChanged(m_videoStatus);

    const camera_error_t result = camera_stop_video(m_handle);
    if (result != CAMERA_EOK) {
        emit videoError(QMediaRecorder::ResourceError, tr("Unable to stop video recording"));
    }

    m_videoStatus = QMediaRecorder::LoadedStatus;
    emit videoStatusChanged(m_videoStatus);

    m_videoRecordingDuration.invalidate();
}

bool BbCameraSession::isCaptureModeSupported(camera_handle_t handle, QCamera::CaptureModes mode) const
{
    if (mode & QCamera::CaptureStillImage)
        return camera_has_feature(handle, CAMERA_FEATURE_PHOTO);

    if (mode & QCamera::CaptureVideo)
        return camera_has_feature(handle, CAMERA_FEATURE_VIDEO);

    return false;
}

QList<QSize> BbCameraSession::supportedResolutions(QCamera::CaptureMode mode) const
{
    Q_ASSERT(m_handle != CAMERA_HANDLE_INVALID);

    QList<QSize> list;

    camera_error_t result = CAMERA_EOK;
    camera_res_t resolutions[20];
    unsigned int supported = 0;

    if (mode == QCamera::CaptureStillImage)
        result = camera_get_photo_output_resolutions(m_handle, CAMERA_FRAMETYPE_JPEG, 20, &supported, resolutions);
    else if (mode == QCamera::CaptureVideo)
        result = camera_get_video_output_resolutions(m_handle, 20, &supported, resolutions);

    if (result != CAMERA_EOK)
        return list;

    for (unsigned int i = 0; i < supported; ++i)
        list << QSize(resolutions[i].width, resolutions[i].height);

    return list;
}

QList<QSize> BbCameraSession::supportedViewfinderResolutions(QCamera::CaptureMode mode) const
{
    Q_ASSERT(m_handle != CAMERA_HANDLE_INVALID);

    QList<QSize> list;

    camera_error_t result = CAMERA_EOK;
    camera_res_t resolutions[20];
    unsigned int supported = 0;

    if (mode == QCamera::CaptureStillImage)
        result = camera_get_photo_vf_resolutions(m_handle, 20, &supported, resolutions);
    else if (mode == QCamera::CaptureVideo)
        result = camera_get_video_vf_resolutions(m_handle, 20, &supported, resolutions);

    if (result != CAMERA_EOK)
        return list;

    for (unsigned int i = 0; i < supported; ++i)
        list << QSize(resolutions[i].width, resolutions[i].height);

    return list;
}

QSize BbCameraSession::currentViewfinderResolution(QCamera::CaptureMode mode) const
{
    Q_ASSERT(m_handle != CAMERA_HANDLE_INVALID);

    camera_error_t result = CAMERA_EOK;
    int width = 0;
    int height = 0;

    if (mode == QCamera::CaptureStillImage)
        result = camera_get_photovf_property(m_handle, CAMERA_IMGPROP_WIDTH, &width,
                                                       CAMERA_IMGPROP_HEIGHT, &height);
    else if (mode == QCamera::CaptureVideo)
        result = camera_get_videovf_property(m_handle, CAMERA_IMGPROP_WIDTH, &width,
                                                       CAMERA_IMGPROP_HEIGHT, &height);

    if (result != CAMERA_EOK)
        return QSize();

    return QSize(width, height);
}

QT_END_NAMESPACE