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Diffstat (limited to 'src/multimedia/platform/darwin/camera/avfcamerautility.mm')
| -rw-r--r-- | src/multimedia/platform/darwin/camera/avfcamerautility.mm | 714 |
1 files changed, 0 insertions, 714 deletions
diff --git a/src/multimedia/platform/darwin/camera/avfcamerautility.mm b/src/multimedia/platform/darwin/camera/avfcamerautility.mm deleted file mode 100644 index 444162523..000000000 --- a/src/multimedia/platform/darwin/camera/avfcamerautility.mm +++ /dev/null @@ -1,714 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/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 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "avfcamerautility_p.h" -#include "avfcameradebug_p.h" - -#include <QtCore/qvector.h> -#include <QtCore/qpair.h> -#include <private/qmultimediautils_p.h> -#include "private/avfvideobuffer_p.h" - -#include <functional> -#include <algorithm> -#include <limits> -#include <tuple> - -QT_BEGIN_NAMESPACE - -AVFPSRange qt_connection_framerates(AVCaptureConnection *videoConnection) -{ - Q_ASSERT(videoConnection); - - AVFPSRange newRange; - // "The value in the videoMinFrameDuration is equivalent to the reciprocal - // of the maximum framerate, the value in the videoMaxFrameDuration is equivalent - // to the reciprocal of the minimum framerate." - if (videoConnection.supportsVideoMinFrameDuration) { - const CMTime cmMin = videoConnection.videoMinFrameDuration; - if (CMTimeCompare(cmMin, kCMTimeInvalid)) { // Has some non-default value: - if (const Float64 minSeconds = CMTimeGetSeconds(cmMin)) - newRange.second = 1. / minSeconds; - } - } - - if (videoConnection.supportsVideoMaxFrameDuration) { - const CMTime cmMax = videoConnection.videoMaxFrameDuration; - if (CMTimeCompare(cmMax, kCMTimeInvalid)) { - if (const Float64 maxSeconds = CMTimeGetSeconds(cmMax)) - newRange.first = 1. / maxSeconds; - } - } - - return newRange; -} - -namespace { - -inline bool qt_area_sane(const QSize &size) -{ - return !size.isNull() && size.isValid() - && std::numeric_limits<int>::max() / size.width() >= size.height(); -} - -template <template <typename...> class Comp> // std::less or std::greater (or std::equal_to) -struct ByResolution -{ - bool operator() (AVCaptureDeviceFormat *f1, AVCaptureDeviceFormat *f2)const - { - Q_ASSERT(f1 && f2); - const QSize r1(qt_device_format_resolution(f1)); - const QSize r2(qt_device_format_resolution(f2)); - // use std::tuple for lexicograpical sorting: - const Comp<std::tuple<int, int>> op = {}; - return op(std::make_tuple(r1.width(), r1.height()), - std::make_tuple(r2.width(), r2.height())); - } -}; - -struct FormatHasNoFPSRange : std::unary_function<AVCaptureDeviceFormat *, bool> -{ - bool operator() (AVCaptureDeviceFormat *format) - { - Q_ASSERT(format); - return !format.videoSupportedFrameRateRanges || !format.videoSupportedFrameRateRanges.count; - } -}; - -Float64 qt_find_min_framerate_distance(AVCaptureDeviceFormat *format, Float64 fps) -{ - Q_ASSERT(format && format.videoSupportedFrameRateRanges - && format.videoSupportedFrameRateRanges.count); - - AVFrameRateRange *range = [format.videoSupportedFrameRateRanges objectAtIndex:0]; - Float64 distance = qAbs(range.maxFrameRate - fps); - for (NSUInteger i = 1, e = format.videoSupportedFrameRateRanges.count; i < e; ++i) { - range = [format.videoSupportedFrameRateRanges objectAtIndex:i]; - distance = qMin(distance, qAbs(range.maxFrameRate - fps)); - } - - return distance; -} - -} // Unnamed namespace. - -AVCaptureDeviceFormat *qt_convert_to_capture_device_format(AVCaptureDevice *captureDevice, - const QCameraFormat &cameraFormat) -{ - AVCaptureDeviceFormat *newFormat = nil; - NSArray<AVCaptureDeviceFormat *> *formats = captureDevice.formats; - for (AVCaptureDeviceFormat *format in formats) { - CMFormatDescriptionRef formatDesc = format.formatDescription; - CMVideoDimensions dim = CMVideoFormatDescriptionGetDimensions(formatDesc); - FourCharCode formatCodec = CMVideoFormatDescriptionGetCodecType(formatDesc); - if (AVFVideoBuffer::fromCVPixelFormat(formatCodec) == cameraFormat.pixelFormat() - && cameraFormat.resolution().width() == dim.width - && cameraFormat.resolution().height() == dim.height) { - for (AVFrameRateRange *frameRateRange in format.videoSupportedFrameRateRanges) { - if (frameRateRange.minFrameRate >= cameraFormat.minFrameRate() - && frameRateRange.maxFrameRate <= cameraFormat.maxFrameRate()) { - newFormat = format; - break; - } - } - } - if (newFormat) - break; - } - return newFormat; -} - -QVector<AVCaptureDeviceFormat *> qt_unique_device_formats(AVCaptureDevice *captureDevice, FourCharCode filter) -{ - // 'filter' is the format we prefer if we have duplicates. - Q_ASSERT(captureDevice); - - QVector<AVCaptureDeviceFormat *> formats; - - if (!captureDevice.formats || !captureDevice.formats.count) - return formats; - - formats.reserve(captureDevice.formats.count); - for (AVCaptureDeviceFormat *format in captureDevice.formats) { - const QSize resolution(qt_device_format_resolution(format)); - if (resolution.isNull() || !resolution.isValid()) - continue; - formats << format; - } - - if (!formats.size()) - return formats; - - std::sort(formats.begin(), formats.end(), ByResolution<std::less>()); - - QSize size(qt_device_format_resolution(formats[0])); - FourCharCode codec = CMVideoFormatDescriptionGetCodecType(formats[0].formatDescription); - int last = 0; - for (int i = 1; i < formats.size(); ++i) { - const QSize nextSize(qt_device_format_resolution(formats[i])); - if (nextSize == size) { - if (codec == filter) - continue; - formats[last] = formats[i]; - } else { - ++last; - formats[last] = formats[i]; - size = nextSize; - } - codec = CMVideoFormatDescriptionGetCodecType(formats[i].formatDescription); - } - formats.resize(last + 1); - - return formats; -} - -QSize qt_device_format_resolution(AVCaptureDeviceFormat *format) -{ - if (!format || !format.formatDescription) - return QSize(); - - const CMVideoDimensions res = CMVideoFormatDescriptionGetDimensions(format.formatDescription); - return QSize(res.width, res.height); -} - -QSize qt_device_format_high_resolution(AVCaptureDeviceFormat *format) -{ - Q_ASSERT(format); - QSize res; -#if defined(Q_OS_IOS) - const CMVideoDimensions hrDim(format.highResolutionStillImageDimensions); - res.setWidth(hrDim.width); - res.setHeight(hrDim.height); -#endif - return res; -} - -QVector<AVFPSRange> qt_device_format_framerates(AVCaptureDeviceFormat *format) -{ - Q_ASSERT(format); - - QVector<AVFPSRange> qtRanges; - - if (!format.videoSupportedFrameRateRanges || !format.videoSupportedFrameRateRanges.count) - return qtRanges; - - qtRanges.reserve(format.videoSupportedFrameRateRanges.count); - for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges) - qtRanges << AVFPSRange(range.minFrameRate, range.maxFrameRate); - - return qtRanges; -} - -QSize qt_device_format_pixel_aspect_ratio(AVCaptureDeviceFormat *format) -{ - Q_ASSERT(format); - - if (!format.formatDescription) { - qDebugCamera() << Q_FUNC_INFO << "no format description found"; - return QSize(); - } - - const CMVideoDimensions res = CMVideoFormatDescriptionGetDimensions(format.formatDescription); - const CGSize resPAR = CMVideoFormatDescriptionGetPresentationDimensions(format.formatDescription, true, false); - - if (qAbs(resPAR.width - res.width) < 1.) { - // "Pixel aspect ratio is used to adjust the width, leaving the height alone." - return QSize(1, 1); - } - - if (!res.width || !resPAR.width) - return QSize(); - - int n, d; - qt_real_to_fraction(resPAR.width > res.width - ? res.width / qreal(resPAR.width) - : resPAR.width / qreal(res.width), - &n, &d); - - return QSize(n, d); -} - -AVCaptureDeviceFormat *qt_find_best_resolution_match(AVCaptureDevice *captureDevice, - const QSize &request, - FourCharCode filter, - bool stillImage) -{ - Q_ASSERT(captureDevice); - Q_ASSERT(!request.isNull() && request.isValid()); - - if (!captureDevice.formats || !captureDevice.formats.count) - return nullptr; - - QVector<AVCaptureDeviceFormat *> formats(qt_unique_device_formats(captureDevice, filter)); - - for (int i = 0; i < formats.size(); ++i) { - AVCaptureDeviceFormat *format = formats[i]; - if (qt_device_format_resolution(format) == request) - return format; - // iOS only (still images). - if (stillImage && qt_device_format_high_resolution(format) == request) - return format; - } - - if (!qt_area_sane(request)) - return nullptr; - - typedef QPair<QSize, AVCaptureDeviceFormat *> FormatPair; - - QVector<FormatPair> pairs; // default|HR sizes - pairs.reserve(formats.size()); - - for (int i = 0; i < formats.size(); ++i) { - AVCaptureDeviceFormat *format = formats[i]; - const QSize res(qt_device_format_resolution(format)); - if (!res.isNull() && res.isValid() && qt_area_sane(res)) - pairs << FormatPair(res, format); - const QSize highRes(qt_device_format_high_resolution(format)); - if (stillImage && !highRes.isNull() && highRes.isValid() && qt_area_sane(highRes)) - pairs << FormatPair(highRes, format); - } - - if (!pairs.size()) - return nullptr; - - AVCaptureDeviceFormat *best = pairs[0].second; - QSize next(pairs[0].first); - int wDiff = qAbs(request.width() - next.width()); - int hDiff = qAbs(request.height() - next.height()); - const int area = request.width() * request.height(); - int areaDiff = qAbs(area - next.width() * next.height()); - for (int i = 1; i < pairs.size(); ++i) { - next = pairs[i].first; - const int newWDiff = qAbs(next.width() - request.width()); - const int newHDiff = qAbs(next.height() - request.height()); - const int newAreaDiff = qAbs(area - next.width() * next.height()); - - if ((newWDiff < wDiff && newHDiff < hDiff) - || ((newWDiff <= wDiff || newHDiff <= hDiff) && newAreaDiff <= areaDiff)) { - wDiff = newWDiff; - hDiff = newHDiff; - best = pairs[i].second; - areaDiff = newAreaDiff; - } - } - - return best; -} - -AVCaptureDeviceFormat *qt_find_best_framerate_match(AVCaptureDevice *captureDevice, - FourCharCode filter, - Float64 fps) -{ - Q_ASSERT(captureDevice); - Q_ASSERT(fps > 0.); - - const qreal epsilon = 0.1; - - QVector<AVCaptureDeviceFormat *>sorted(qt_unique_device_formats(captureDevice, filter)); - // Sort formats by their resolution in decreasing order: - std::sort(sorted.begin(), sorted.end(), ByResolution<std::greater>()); - // We can use only formats with framerate ranges: - sorted.erase(std::remove_if(sorted.begin(), sorted.end(), FormatHasNoFPSRange()), sorted.end()); - - if (!sorted.size()) - return nil; - - for (int i = 0; i < sorted.size(); ++i) { - AVCaptureDeviceFormat *format = sorted[i]; - for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges) { - if (range.maxFrameRate - range.minFrameRate < epsilon) { - // On OS X ranges are points (built-in camera). - if (qAbs(fps - range.maxFrameRate) < epsilon) - return format; - } - - if (fps >= range.minFrameRate && fps <= range.maxFrameRate) - return format; - } - } - - Float64 distance = qt_find_min_framerate_distance(sorted[0], fps); - AVCaptureDeviceFormat *match = sorted[0]; - for (int i = 1; i < sorted.size(); ++i) { - const Float64 newDistance = qt_find_min_framerate_distance(sorted[i], fps); - if (newDistance < distance) { - distance = newDistance; - match = sorted[i]; - } - } - - return match; -} - -AVFrameRateRange *qt_find_supported_framerate_range(AVCaptureDeviceFormat *format, Float64 fps) -{ - Q_ASSERT(format && format.videoSupportedFrameRateRanges - && format.videoSupportedFrameRateRanges.count); - - const qreal epsilon = 0.1; - - for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges) { - if (range.maxFrameRate - range.minFrameRate < epsilon) { - // On OS X ranges are points (built-in camera). - if (qAbs(fps - range.maxFrameRate) < epsilon) - return range; - } - - if (fps >= range.minFrameRate && fps <= range.maxFrameRate) - return range; - } - - AVFrameRateRange *match = [format.videoSupportedFrameRateRanges objectAtIndex:0]; - Float64 distance = qAbs(match.maxFrameRate - fps); - for (NSUInteger i = 1, e = format.videoSupportedFrameRateRanges.count; i < e; ++i) { - AVFrameRateRange *range = [format.videoSupportedFrameRateRanges objectAtIndex:i]; - const Float64 newDistance = qAbs(range.maxFrameRate - fps); - if (newDistance < distance) { - distance = newDistance; - match = range; - } - } - - return match; -} - -bool qt_format_supports_framerate(AVCaptureDeviceFormat *format, qreal fps) -{ - if (format && fps > qreal(0)) { - const qreal epsilon = 0.1; - for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges) { - if (fps >= range.minFrameRate - epsilon && fps <= range.maxFrameRate + epsilon) - return true; - } - } - - return false; -} - -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; -} - -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; - - 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; -} - -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]; -#elif defined(Q_OS_MACOS) - 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 (CMTimeCompare(maxFrameDuration, kCMTimeInvalid)) - [captureDevice setActiveVideoMaxFrameDuration:maxFrameDuration]; -#endif // Q_OS_MACOS -} - -void qt_set_framerate_limits(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection, - qreal minFPS, qreal maxFPS) -{ - Q_UNUSED(videoConnection); - Q_ASSERT(captureDevice); - qt_set_framerate_limits(captureDevice, minFPS, maxFPS); -} - -AVFPSRange qt_current_framerates(AVCaptureDevice *captureDevice, AVCaptureConnection *videoConnection) -{ - Q_UNUSED(videoConnection); - Q_ASSERT(captureDevice); - - AVFPSRange fps; - const CMTime minDuration = captureDevice.activeVideoMinFrameDuration; - if (CMTimeCompare(minDuration, kCMTimeInvalid)) { - if (const Float64 minSeconds = CMTimeGetSeconds(minDuration)) - fps.second = 1. / minSeconds; // Max FPS = 1 / MinDuration. - } - - const CMTime maxDuration = captureDevice.activeVideoMaxFrameDuration; - if (CMTimeCompare(maxDuration, kCMTimeInvalid)) { - if (const Float64 maxSeconds = CMTimeGetSeconds(maxDuration)) - fps.first = 1. / maxSeconds; // Min FPS = 1 / MaxDuration. - } - - return fps; -} - -QList<AudioValueRange> qt_supported_sample_rates_for_format(int codecId) -{ - QList<AudioValueRange> result; - UInt32 format = codecId; - UInt32 size; - OSStatus err = AudioFormatGetPropertyInfo( - kAudioFormatProperty_AvailableEncodeSampleRates, - sizeof(format), - &format, - &size); - - if (err != noErr) - return result; - - UInt32 numRanges = size / sizeof(AudioValueRange); - AudioValueRange sampleRanges[numRanges]; - - err = AudioFormatGetProperty(kAudioFormatProperty_AvailableEncodeSampleRates, - sizeof(format), - &format, - &size, - sampleRanges); - if (err != noErr) - return result; - - for (UInt32 i = 0; i < numRanges; i++) - result << sampleRanges[i]; - - return result; -} - -QList<AudioValueRange> qt_supported_bit_rates_for_format(int codecId) -{ - QList<AudioValueRange> result; - UInt32 format = codecId; - UInt32 size; - OSStatus err = AudioFormatGetPropertyInfo( - kAudioFormatProperty_AvailableEncodeBitRates, - sizeof(format), - &format, - &size); - - if (err != noErr) - return result; - - UInt32 numRanges = size / sizeof(AudioValueRange); - AudioValueRange bitRanges[numRanges]; - - err = AudioFormatGetProperty(kAudioFormatProperty_AvailableEncodeBitRates, - sizeof(format), - &format, - &size, - bitRanges); - if (err != noErr) - return result; - - for (UInt32 i = 0; i < numRanges; i++) - result << bitRanges[i]; - - return result; -} - -std::optional<QList<UInt32>> qt_supported_channel_counts_for_format(int codecId) -{ - QList<UInt32> result; - AudioStreamBasicDescription sf = {}; - sf.mFormatID = codecId; - UInt32 size; - OSStatus err = AudioFormatGetPropertyInfo( - kAudioFormatProperty_AvailableEncodeNumberChannels, - sizeof(sf), - &sf, - &size); - - if (err != noErr) - return result; - - // From Apple's docs: - // A value of 0xFFFFFFFF indicates that any number of channels may be encoded. - if (int(size) == -1) - return std::nullopt; - - UInt32 numCounts = size / sizeof(UInt32); - UInt32 channelCounts[numCounts]; - - err = AudioFormatGetProperty(kAudioFormatProperty_AvailableEncodeNumberChannels, - sizeof(sf), - &sf, - &size, - channelCounts); - if (err != noErr) - return result; - - for (UInt32 i = 0; i < numCounts; i++) - result << channelCounts[i]; - - return result; -} - -QT_END_NAMESPACE |