1 files changed, 125 insertions, 0 deletions
diff --git a/DOCS/client_api_examples/qml/mpvrenderer.cpp b/DOCS/client_api_examples/qml/mpvrenderer.cpp
new file mode 100644
index 0000000000..af62fd2762
--- /dev/null
+++ b/DOCS/client_api_examples/qml/mpvrenderer.cpp
@@ -0,0 +1,125 @@
+#include "mpvrenderer.h"
+
+#include <QObject>
+#include <QtGlobal>
+#include <QOpenGLContext>
+
+#include <QtGui/QOpenGLFramebufferObject>
+
+#include <QtQuick/QQuickWindow>
+#include <qsgsimpletexturenode.h>
+
+class MpvRenderer : public QQuickFramebufferObject::Renderer
+{
+    static void *get_proc_address(void *ctx, const char *name) {
+        (void)ctx;
+        QOpenGLContext *glctx = QOpenGLContext::currentContext();
+        if (!glctx)
+            return NULL;
+        return (void *)glctx->getProcAddress(QByteArray(name));
+    }
+
+    mpv_opengl_cb_context *mpv_gl;
+    QQuickWindow *window;
+public:
+    MpvRenderer(mpv_opengl_cb_context *a_mpv_gl)
+        : mpv_gl(a_mpv_gl), window(NULL)
+    {
+        int r = mpv_opengl_cb_init_gl(mpv_gl, NULL, get_proc_address, NULL);
+        if (r < 0)
+            throw "could not initialize OpenGL";
+    }
+
+    virtual ~MpvRenderer()
+    {
+        mpv_opengl_cb_uninit_gl(mpv_gl);
+    }
+
+    void render()
+    {
+        assert(window); // must have been set by synchronize()
+
+        QOpenGLFramebufferObject *fbo = framebufferObject();
+        int vp[4] = {0, 0, fbo->width(), fbo->height()};
+        window->resetOpenGLState();
+        mpv_opengl_cb_render(mpv_gl, fbo->handle(), vp);
+        window->resetOpenGLState();
+    }
+
+    QOpenGLFramebufferObject *createFramebufferObject(const QSize &size)
+    {
+        QOpenGLFramebufferObjectFormat format;
+        format.setSamples(4);
+        return new QOpenGLFramebufferObject(size, format);
+    }
+
+protected:
+    virtual void synchronize(QQuickFramebufferObject *item)
+    {
+        window = item->window();
+    }
+};
+
+MpvObject::MpvObject(QQuickItem * parent)
+    : QQuickFramebufferObject(parent)
+{
+    mpv = mpv_create();
+    if (!mpv)
+        throw "could not create mpv context";
+
+    mpv_set_option_string(mpv, "terminal", "yes");
+    mpv_set_option_string(mpv, "msg-level", "all=v");
+
+    if (mpv_initialize(mpv) < 0) {
+        mpv_terminate_destroy(mpv);
+        throw "could not initialize mpv context";
+    }
+
+    // Make use of the MPV_SUB_API_OPENGL_CB API.
+    mpv::qt::set_option_variant(mpv, "vo", "opengl-cb");
+
+    // Request hw decoding, just for testing.
+    mpv::qt::set_option_variant(mpv, "hwdec", "auto");
+
+    mpv_gl = (mpv_opengl_cb_context *)mpv_get_sub_api(mpv, MPV_SUB_API_OPENGL_CB);
+    if (!mpv_gl) {
+        mpv_terminate_destroy(mpv);
+        throw "OpenGL not compiled in";
+    }
+
+    mpv_opengl_cb_set_update_callback(mpv_gl, on_update, (void *)this);
+
+    connect(this, &MpvObject::onUpdate, this, &MpvObject::doUpdate, Qt::QueuedConnection);
+}
+
+MpvObject::~MpvObject()
+{
+    mpv_terminate_destroy(mpv);
+}
+
+void MpvObject::on_update(void *ctx)
+{
+    MpvObject *self = (MpvObject *)ctx;
+    emit self->onUpdate();
+}
+
+// connected to onUpdate(); signal makes sure it runs on the GUI thread
+void MpvObject::doUpdate()
+{
+    update();
+}
+
+void MpvObject::loadfile(const QString& filename)
+{
+    QVariantList cmd;
+    cmd.append("loadfile");
+    cmd.append(filename);
+    mpv::qt::command_variant(mpv, cmd);
+}
+
+QQuickFramebufferObject::Renderer *MpvObject::createRenderer() const
+{
+    window()->setPersistentOpenGLContext(true);
+    window()->setPersistentSceneGraph(true);
+    return new MpvRenderer(mpv_gl);
+}