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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qgstreamervideosink_p.h"
#include "qgstvideorenderersink_p.h"
#include "qgstsubtitlesink_p.h"
#include <qgstutils_p.h>
#include <QtGui/private/qrhi_p.h>
#if QT_CONFIG(gstreamer_gl)
#include <QtGui/private/qrhigles2_p.h>
#include <QGuiApplication>
#include <QtGui/qopenglcontext.h>
#include <QWindow>
#include <qpa/qplatformnativeinterface.h>
#include <gst/gl/gstglconfig.h>
#if GST_GL_HAVE_WINDOW_X11 && __has_include("X11/Xlib-xcb.h")
# include <gst/gl/x11/gstgldisplay_x11.h>
#endif
#if GST_GL_HAVE_PLATFORM_EGL
# include <gst/gl/egl/gstgldisplay_egl.h>
# include <EGL/egl.h>
# include <EGL/eglext.h>
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND && __has_include("wayland-client.h")
# include <gst/gl/wayland/gstgldisplay_wayland.h>
#endif
#endif // #if QT_CONFIG(gstreamer_gl)
#include <QtCore/qdebug.h>
#include <QtCore/qloggingcategory.h>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(qLcMediaVideoSink, "qt.multimedia.videosink")
QGstreamerVideoSink::QGstreamerVideoSink(QVideoSink *parent)
: QPlatformVideoSink(parent)
{
sinkBin = QGstBin("videoSinkBin");
// This is a hack for some iMX platforms. Thos require the use of a special video
// conversion element in the pipeline before the video sink, as they unfortunately
// output some proprietary format from the decoder even though it's marked as
// a regular supported video/x-raw format.
//
// To fix this, simply insert the element into the pipeline if it's available. Otherwise
// we simply use an identity element.
gstQueue = QGstElement("queue");
auto imxVideoConvert = QGstElement("imxvideoconvert_g2d");
if (!imxVideoConvert.isNull())
gstPreprocess = imxVideoConvert;
else
gstPreprocess = QGstElement("identity");
sinkBin.add(gstQueue, gstPreprocess);
gstQueue.link(gstPreprocess);
sinkBin.addGhostPad(gstQueue, "sink");
gstSubtitleSink = GST_ELEMENT(QGstSubtitleSink::createSink(this));
}
QGstreamerVideoSink::~QGstreamerVideoSink()
{
unrefGstContexts();
setPipeline(QGstPipeline());
}
QGstElement QGstreamerVideoSink::gstSink()
{
updateSinkElement();
return sinkBin;
}
void QGstreamerVideoSink::setPipeline(QGstPipeline pipeline)
{
gstPipeline = pipeline;
}
bool QGstreamerVideoSink::inStoppedState() const
{
if (gstPipeline.isNull())
return true;
return gstPipeline.inStoppedState();
}
void QGstreamerVideoSink::setRhi(QRhi *rhi)
{
if (rhi && rhi->backend() != QRhi::OpenGLES2)
rhi = nullptr;
if (m_rhi == rhi)
return;
m_rhi = rhi;
updateGstContexts();
if (!gstQtSink.isNull()) {
// force creation of a new sink with proper caps
createQtSink();
updateSinkElement();
}
}
void QGstreamerVideoSink::createQtSink()
{
gstQtSink = QGstElement(reinterpret_cast<GstElement *>(QGstVideoRendererSink::createSink(this)));
}
void QGstreamerVideoSink::updateSinkElement()
{
QGstElement newSink;
if (gstQtSink.isNull())
createQtSink();
newSink = gstQtSink;
if (newSink == gstVideoSink)
return;
gstPipeline.beginConfig();
if (!gstVideoSink.isNull()) {
gstVideoSink.setStateSync(GST_STATE_NULL);
sinkBin.remove(gstVideoSink);
}
gstVideoSink = newSink;
sinkBin.add(gstVideoSink);
if (!gstPreprocess.link(gstVideoSink))
qCDebug(qLcMediaVideoSink) << "couldn't link preprocess and sink";
gstVideoSink.setState(GST_STATE_PAUSED);
gstPipeline.endConfig();
gstPipeline.dumpGraph("updateVideoSink");
}
void QGstreamerVideoSink::unrefGstContexts()
{
if (m_gstGlDisplayContext)
gst_context_unref(m_gstGlDisplayContext);
m_gstGlDisplayContext = nullptr;
if (m_gstGlLocalContext)
gst_context_unref(m_gstGlLocalContext);
m_gstGlLocalContext = nullptr;
m_eglDisplay = nullptr;
m_eglImageTargetTexture2D = nullptr;
}
void QGstreamerVideoSink::updateGstContexts()
{
unrefGstContexts();
#if QT_CONFIG(gstreamer_gl)
if (!m_rhi || m_rhi->backend() != QRhi::OpenGLES2)
return;
auto *nativeHandles = static_cast<const QRhiGles2NativeHandles *>(m_rhi->nativeHandles());
auto glContext = nativeHandles->context;
Q_ASSERT(glContext);
const QString platform = QGuiApplication::platformName();
QPlatformNativeInterface *pni = QGuiApplication::platformNativeInterface();
m_eglDisplay = pni->nativeResourceForIntegration("egldisplay");
// qDebug() << "platform is" << platform << m_eglDisplay;
GstGLDisplay *gstGlDisplay = nullptr;
const char *contextName = "eglcontext";
GstGLPlatform glPlatform = GST_GL_PLATFORM_EGL;
// use the egl display if we have one
if (m_eglDisplay) {
#if GST_GL_HAVE_PLATFORM_EGL
gstGlDisplay = (GstGLDisplay *)gst_gl_display_egl_new_with_egl_display(m_eglDisplay);
m_eglImageTargetTexture2D = eglGetProcAddress("glEGLImageTargetTexture2DOES");
#endif
} else {
auto display = pni->nativeResourceForIntegration("display");
if (display) {
#if GST_GL_HAVE_WINDOW_X11 && __has_include("X11/Xlib-xcb.h")
if (platform == QLatin1String("xcb")) {
contextName = "glxcontext";
glPlatform = GST_GL_PLATFORM_GLX;
gstGlDisplay = (GstGLDisplay *)gst_gl_display_x11_new_with_display((Display *)display);
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND && __has_include("wayland-client.h")
if (platform.startsWith(QLatin1String("wayland"))) {
Q_ASSERT(!gstGlDisplay);
gstGlDisplay = (GstGLDisplay *)gst_gl_display_wayland_new_with_display((struct wl_display *)display);
}
#endif
}
}
if (!gstGlDisplay) {
qWarning() << "Could not create GstGLDisplay";
return;
}
void *nativeContext = pni->nativeResourceForContext(contextName, glContext);
if (!nativeContext)
qWarning() << "Could not find resource for" << contextName;
GstGLAPI glApi = QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL ? GST_GL_API_OPENGL : GST_GL_API_GLES2;
GstGLContext *appContext = gst_gl_context_new_wrapped(gstGlDisplay, (guintptr)nativeContext, glPlatform, glApi);
if (!appContext)
qWarning() << "Could not create wrappped context for platform:" << glPlatform;
GstGLContext *displayContext = nullptr;
GError *error = nullptr;
gst_gl_display_create_context(gstGlDisplay, appContext, &displayContext, &error);
if (error) {
qWarning() << "Could not create display context:" << error->message;
g_clear_error(&error);
}
if (appContext)
gst_object_unref(appContext);
m_gstGlDisplayContext = gst_context_new(GST_GL_DISPLAY_CONTEXT_TYPE, false);
gst_context_set_gl_display(m_gstGlDisplayContext, gstGlDisplay);
gst_object_unref(gstGlDisplay);
m_gstGlLocalContext = gst_context_new("gst.gl.local_context", false);
GstStructure *structure = gst_context_writable_structure(m_gstGlLocalContext);
gst_structure_set(structure, "context", GST_TYPE_GL_CONTEXT, displayContext, nullptr);
gst_object_unref(displayContext);
if (!gstPipeline.isNull())
gst_element_set_context(gstPipeline.element(), m_gstGlLocalContext);
#endif // #if QT_CONFIG(gstreamer_gl)
}
QT_END_NAMESPACE
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