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winrt: Fix crash during certain video operations

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The abstract video buffer pointer was being reused and (improperly)
deleted when its reference count went to zero. As QVideoFrame utilizes
an explicitly shared pointer which also tracks the video buffer, simply
reuse the QVideoFrame instance instead.

Task-number: QTBUG-47373
Change-Id: Idadae205cb520a0a1d752aa20256c0567b3be699
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
This commit is contained in:
Peng Wu
2015-07-22 18:34:02 +03:00
parent f25034afaf
commit 94eb599b69
1 changed files with 10 additions and 27 deletions
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37
src/plugins/winrt/qwinrtabstractvideorenderercontrol.cpp
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@@ -125,21 +125,13 @@ Q_GLOBAL_STATIC(QWinRTVideoRendererControlGlobal, g)
class QWinRTVideoBuffer : public QAbstractVideoBuffer, public QOpenGLTexture
{
public:
QWinRTVideoBuffer()
QWinRTVideoBuffer(const QSize &size, TextureFormat format)
: QAbstractVideoBuffer(QAbstractVideoBuffer::GLTextureHandle)
, QOpenGLTexture(QOpenGLTexture::Target2D)
{
}
void addRef()
{
refCount.ref();
}
void release() Q_DECL_OVERRIDE
{
if (!refCount.deref())
delete this;
setSize(size.width(), size.height());
setFormat(format);
create();
}
MapMode mapMode() const Q_DECL_OVERRIDE
@@ -163,9 +155,6 @@ public:
{
return QVariant::fromValue(textureId());
}
private:
QAtomicInt refCount;
};
enum DirtyState {
@@ -189,7 +178,7 @@ public:
EGLConfig eglConfig;
EGLSurface eglSurface;
QWinRTVideoBuffer *videoBuffer;
QVideoFrame presentFrame;
QThread renderThread;
bool active;
@@ -224,8 +213,6 @@ QWinRTAbstractVideoRendererControl::QWinRTAbstractVideoRendererControl(const QSi
d->eglSurface = EGL_NO_SURFACE;
d->active = false;
d->videoBuffer = new QWinRTVideoBuffer;
connect(&d->renderThread, &QThread::started,
this, &QWinRTAbstractVideoRendererControl::syncAndRender,
Qt::DirectConnection);
@@ -390,23 +377,19 @@ void QWinRTAbstractVideoRendererControl::present()
return;
}
d->videoBuffer->setFormat(QOpenGLTexture::RGBAFormat);
d->videoBuffer->setSize(d->format.frameWidth(), d->format.frameHeight());
if (!d->videoBuffer->isCreated())
d->videoBuffer->create();
QWinRTVideoBuffer *videoBuffer = new QWinRTVideoBuffer(d->format.frameSize(), QOpenGLTexture::RGBAFormat);
d->presentFrame = QVideoFrame(videoBuffer, d->format.frameSize(), d->format.pixelFormat());
// bind the pbuffer surface to the texture
d->videoBuffer->bind();
videoBuffer->bind();
eglBindTexImage(d->eglDisplay, d->eglSurface, EGL_BACK_BUFFER);
static_cast<QOpenGLTexture *>(d->videoBuffer)->release();
static_cast<QOpenGLTexture *>(videoBuffer)->release();
d->dirtyState = NotDirty;
}
// Present the frame
d->videoBuffer->addRef();
QVideoFrame frame(d->videoBuffer, d->format.frameSize(), d->format.pixelFormat());
d->surface->present(frame);
d->surface->present(d->presentFrame);
}
QT_END_NAMESPACE