diff options
Diffstat (limited to 'src/plugins/avfoundation/camera/avfcamerautility.mm')
| -rw-r--r-- | src/plugins/avfoundation/camera/avfcamerautility.mm | 240 |
1 files changed, 238 insertions, 2 deletions
diff --git a/src/plugins/avfoundation/camera/avfcamerautility.mm b/src/plugins/avfoundation/camera/avfcamerautility.mm index bdf88e24f..279642e4f 100644 --- a/src/plugins/avfoundation/camera/avfcamerautility.mm +++ b/src/plugins/avfoundation/camera/avfcamerautility.mm @@ -177,8 +177,7 @@ QVector<AVCaptureDeviceFormat *> qt_unique_device_formats(AVCaptureDevice *captu QSize qt_device_format_resolution(AVCaptureDeviceFormat *format) { - Q_ASSERT(format); - if (!format.formatDescription) + if (!format || !format.formatDescription) return QSize(); const CMVideoDimensions res = CMVideoFormatDescriptionGetDimensions(format.formatDescription); @@ -387,6 +386,243 @@ AVFrameRateRange *qt_find_supported_framerate_range(AVCaptureDeviceFormat *forma return match; } +bool qt_formats_are_equal(AVCaptureDeviceFormat *f1, AVCaptureDeviceFormat *f2) +{ + if (f1 == f2) + return true; + + if (![f1.mediaType isEqualToString:f2.mediaType]) + return false; + + return CMFormatDescriptionEqual(f1.formatDescription, f2.formatDescription); +} + +bool qt_set_active_format(AVCaptureDevice *captureDevice, AVCaptureDeviceFormat *format, bool preserveFps) +{ + static bool firstSet = true; + + if (!captureDevice || !format) + return false; + + if (qt_formats_are_equal(captureDevice.activeFormat, format)) { + if (firstSet) { + // The capture device format is persistent. The first time we set a format, report that + // it changed even if the formats are the same. + // This prevents the session from resetting the format to the default value. + firstSet = false; + return true; + } + return false; + } + + firstSet = false; + + const AVFConfigurationLock lock(captureDevice); + if (!lock) { + qWarning("Failed to set active format (lock failed)"); + return false; + } + + // Changing the activeFormat resets the frame rate. + AVFPSRange fps; + if (preserveFps) + fps = qt_current_framerates(captureDevice, nil); + + captureDevice.activeFormat = format; + + if (preserveFps) + qt_set_framerate_limits(captureDevice, nil, fps.first, fps.second); + + return true; +} + #endif // SDK +void qt_set_framerate_limits(AVCaptureConnection *videoConnection, qreal minFPS, qreal maxFPS) +{ + Q_ASSERT(videoConnection); + + if (minFPS < 0. || maxFPS < 0. || (maxFPS && maxFPS < minFPS)) { + qDebugCamera() << Q_FUNC_INFO << "invalid framerates (min, max):" + << minFPS << maxFPS; + return; + } + + CMTime minDuration = kCMTimeInvalid; + if (maxFPS > 0.) { + if (!videoConnection.supportsVideoMinFrameDuration) + qDebugCamera() << Q_FUNC_INFO << "maximum framerate is not supported"; + else + minDuration = CMTimeMake(1, maxFPS); + } + if (videoConnection.supportsVideoMinFrameDuration) + videoConnection.videoMinFrameDuration = minDuration; + +#if QT_MAC_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_9, __IPHONE_5_0) +#if QT_OSX_DEPLOYMENT_TARGET_BELOW(__MAC_10_9) + if (QSysInfo::MacintoshVersion < QSysInfo::MV_10_9) { + if (minFPS > 0.) + qDebugCamera() << Q_FUNC_INFO << "minimum framerate is not supported"; + } else +#endif + { + CMTime maxDuration = kCMTimeInvalid; + if (minFPS > 0.) { + if (!videoConnection.supportsVideoMaxFrameDuration) + qDebugCamera() << Q_FUNC_INFO << "minimum framerate is not supported"; + else + maxDuration = CMTimeMake(1, minFPS); + } + if (videoConnection.supportsVideoMaxFrameDuration) + videoConnection.videoMaxFrameDuration = maxDuration; + } +#else + if (minFPS > 0.) + qDebugCamera() << Q_FUNC_INFO << "minimum framerate is not supported"; +#endif +} + +#if QT_MAC_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_7, __IPHONE_7_0) + +CMTime qt_adjusted_frame_duration(AVFrameRateRange *range, qreal fps) +{ + Q_ASSERT(range); + Q_ASSERT(fps > 0.); + + if (range.maxFrameRate - range.minFrameRate < 0.1) { + // Can happen on OS X. + return range.minFrameDuration; + } + + if (fps <= range.minFrameRate) + return range.maxFrameDuration; + if (fps >= range.maxFrameRate) + return range.minFrameDuration; + + int n, d; + qt_real_to_fraction(1. / fps, &n, &d); + return CMTimeMake(n, d); +} + +void qt_set_framerate_limits(AVCaptureDevice *captureDevice, qreal minFPS, qreal maxFPS) +{ + Q_ASSERT(captureDevice); + if (!captureDevice.activeFormat) { + qDebugCamera() << Q_FUNC_INFO << "no active capture device format"; + return; + } + + if (minFPS < 0. || maxFPS < 0. || (maxFPS && maxFPS < minFPS)) { + qDebugCamera() << Q_FUNC_INFO << "invalid framerates (min, max):" + << minFPS << maxFPS; + return; + } + + CMTime minFrameDuration = kCMTimeInvalid; + CMTime maxFrameDuration = kCMTimeInvalid; + if (maxFPS || minFPS) { + AVFrameRateRange *range = qt_find_supported_framerate_range(captureDevice.activeFormat, + maxFPS ? maxFPS : minFPS); + if (!range) { + qDebugCamera() << Q_FUNC_INFO << "no framerate range found, (min, max):" + << minFPS << maxFPS; + return; + } + + if (maxFPS) + minFrameDuration = qt_adjusted_frame_duration(range, maxFPS); + if (minFPS) + maxFrameDuration = qt_adjusted_frame_duration(range, minFPS); + } + + const AVFConfigurationLock lock(captureDevice); + if (!lock) { + qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; + return; + } + + // While Apple's docs say kCMTimeInvalid will end in default + // settings for this format, kCMTimeInvalid on OS X ends with a runtime + // exception: + // "The activeVideoMinFrameDuration passed is not supported by the device." + // Instead, use the first item in the supported frame rates. +#ifdef Q_OS_IOS + [captureDevice setActiveVideoMinFrameDuration:minFrameDuration]; + [captureDevice setActiveVideoMaxFrameDuration:maxFrameDuration]; +#else // Q_OS_OSX + if (CMTimeCompare(minFrameDuration, kCMTimeInvalid) == 0 + && CMTimeCompare(maxFrameDuration, kCMTimeInvalid) == 0) { + AVFrameRateRange *range = captureDevice.activeFormat.videoSupportedFrameRateRanges.firstObject; + minFrameDuration = range.minFrameDuration; + maxFrameDuration = range.maxFrameDuration; + } + + if (CMTimeCompare(minFrameDuration, kCMTimeInvalid)) + [captureDevice setActiveVideoMinFrameDuration:minFrameDuration]; + +#if QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_9) +#if QT_OSX_DEPLOYMENT_TARGET_BELOW(__MAC_10_9) + if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_9) +#endif + { + if (CMTimeCompare(maxFrameDuration, kCMTimeInvalid)) + [captureDevice setActiveVideoMaxFrameDuration:maxFrameDuration]; + } +#endif // QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_9) +#endif // Q_OS_OSX +} + +#endif // Platform SDK >= 10.9, >= 7.0. + +void qt_set_framerate_limits(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection, + qreal minFPS, qreal maxFPS) +{ + Q_ASSERT(captureDevice); +#if QT_MAC_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_7, __IPHONE_7_0) + if (QSysInfo::MacintoshVersion >= qt_OS_limit(QSysInfo::MV_10_9, QSysInfo::MV_IOS_7_0)) + qt_set_framerate_limits(captureDevice, minFPS, maxFPS); + else +#endif + if (videoConnection) + qt_set_framerate_limits(videoConnection, minFPS, maxFPS); + +} + +AVFPSRange qt_current_framerates(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection) +{ + Q_ASSERT(captureDevice); + + AVFPSRange fps; +#if QT_MAC_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_7, __IPHONE_7_0) + if (QSysInfo::MacintoshVersion >= qt_OS_limit(QSysInfo::MV_10_7, QSysInfo::MV_IOS_7_0)) { + const CMTime minDuration = captureDevice.activeVideoMinFrameDuration; + if (CMTimeCompare(minDuration, kCMTimeInvalid)) { + if (const Float64 minSeconds = CMTimeGetSeconds(minDuration)) + fps.second = 1. / minSeconds; // Max FPS = 1 / MinDuration. + } + +#if QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_9) +#if QT_OSX_DEPLOYMENT_TARGET_BELOW(__MAC_10_9) + if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_9) +#endif + { + const CMTime maxDuration = captureDevice.activeVideoMaxFrameDuration; + if (CMTimeCompare(maxDuration, kCMTimeInvalid)) { + if (const Float64 maxSeconds = CMTimeGetSeconds(maxDuration)) + fps.first = 1. / maxSeconds; // Min FPS = 1 / MaxDuration. + } + } +#endif // QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_9) + + } else { +#else // OSX < 10.7 or iOS < 7.0 + { +#endif // QT_MAC_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_7, __IPHONE_7_0) + if (videoConnection) + fps = qt_connection_framerates(videoConnection); + } + + return fps; +} + QT_END_NAMESPACE |