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winrt: Implement QImageEncoderControl for camera

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Implement QImageEncoderControl for camera still image capture.
It provides the functions to set camera capture resolution and
get supported resolutions list.

Task-number: QTBUG-46456
Change-Id: Ideb1aa02d420be3a30d588bebf31714fa4fa6415
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
This commit is contained in:
Peng Wu
2015-06-12 13:02:38 +03:00
committed by PengWu
parent 3cb698c0fc
commit dc9e10d4b7
7 changed files with 262 additions and 17 deletions
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30
src/plugins/winrt/qwinrtcameraimagecapturecontrol.cpp
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@@ -36,6 +36,7 @@
#include "qwinrtcameraimagecapturecontrol.h"
#include "qwinrtcameracontrol.h"
#include "qwinrtimageencodercontrol.h"
#include <QtCore/QCoreApplication>
#include <QtCore/QDir>
@@ -166,7 +167,7 @@ int QWinRTCameraImageCaptureControl::capture(const QString &fileName)
hr = g->encodingPropertiesFactory->CreateBmp(&request.imageFormat);
Q_ASSERT_SUCCEEDED(hr);
const QSize imageSize = d->cameraControl->imageSize();
const QSize imageSize = static_cast<QWinRTImageEncoderControl*>(d->cameraControl->imageEncoderControl())->imageSettings().resolution();
hr = request.imageFormat->put_Width(imageSize.width());
Q_ASSERT_SUCCEEDED(hr);
hr = request.imageFormat->put_Height(imageSize.height());
@@ -174,6 +175,10 @@ int QWinRTCameraImageCaptureControl::capture(const QString &fileName)
hr = capture->CapturePhotoToStreamAsync(request.imageFormat.Get(), request.stream.Get(), &request.op);
Q_ASSERT_SUCCEEDED(hr);
if (!request.op) {
qErrnoWarning("Camera photo capture failed.");
return -1;
}
d->requests.insert(request.op.Get(), request);
hr = request.op->put_Completed(Callback<IAsyncActionCompletedHandler>(
@@ -266,7 +271,28 @@ HRESULT QWinRTCameraImageCaptureControl::onCaptureCompleted(IAsyncAction *asyncI
const QImage image(pixelData, pixelWidth, pixelHeight, QImage::Format_RGBA8888,
reinterpret_cast<QImageCleanupFunction>(&CoTaskMemFree), pixelData);
emit imageCaptured(request.id, image);
if (image.save(request.fileName))
QWinRTImageEncoderControl *imageEncoderControl = static_cast<QWinRTImageEncoderControl*>(d->cameraControl->imageEncoderControl());
int imageQuality = 100;
switch (imageEncoderControl->imageSettings().quality()) {
case QMultimedia::VeryLowQuality:
imageQuality = 20;
break;
case QMultimedia::LowQuality:
imageQuality = 40;
break;
case QMultimedia::NormalQuality:
imageQuality = 60;
break;
case QMultimedia::HighQuality:
imageQuality = 80;
break;
case QMultimedia::VeryHighQuality:
imageQuality = 100;
break;
}
if (image.save(request.fileName, imageEncoderControl->imageSettings().codec().toLatin1().data(), imageQuality))
emit imageSaved(request.id, request.fileName);
else
emit error(request.id, QCameraImageCapture::ResourceError, tr("Image saving failed"));