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#include "mpvrenderer.h"
#include <stdexcept>
#include <QObject>
#include <QtGlobal>
#include <QOpenGLContext>
#include <QtGui/QOpenGLFramebufferObject>
#include <QtQuick/QQuickWindow>
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::qt::Handle mpv;
QQuickWindow *window;
mpv_opengl_cb_context *mpv_gl;
public:
MpvRenderer(const MpvObject *obj)
: mpv(obj->mpv), window(obj->window()), mpv_gl(obj->mpv_gl)
{
int r = mpv_opengl_cb_init_gl(mpv_gl, NULL, get_proc_address, NULL);
if (r < 0)
throw std::runtime_error("could not initialize OpenGL");
}
virtual ~MpvRenderer()
{
// Until this call is done, we need to make sure the player remains
// alive. This is done implicitly with the mpv::qt::Handle instance
// in this class.
mpv_opengl_cb_uninit_gl(mpv_gl);
}
void render()
{
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();
}
};
MpvObject::MpvObject(QQuickItem * parent)
: QQuickFramebufferObject(parent), mpv_gl(0)
{
mpv = mpv::qt::Handle::FromRawHandle(mpv_create());
if (!mpv)
throw std::runtime_error("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)
throw std::runtime_error("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");
// Setup the callback that will make QtQuick update and redraw if there
// is a new video frame. Use a queued connection: this makes sure the
// doUpdate() function is run on the GUI thread.
mpv_gl = (mpv_opengl_cb_context *)mpv_get_sub_api(mpv, MPV_SUB_API_OPENGL_CB);
if (!mpv_gl)
throw std::runtime_error("OpenGL not compiled in");
mpv_opengl_cb_set_update_callback(mpv_gl, MpvObject::on_update, (void *)this);
connect(this, &MpvObject::onUpdate, this, &MpvObject::doUpdate,
Qt::QueuedConnection);
}
MpvObject::~MpvObject()
{
if (mpv_gl)
mpv_opengl_cb_set_update_callback(mpv_gl, NULL, NULL);
}
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::command(const QVariant& params)
{
mpv::qt::command_variant(mpv, params);
}
void MpvObject::setProperty(const QString& name, const QVariant& value)
{
mpv::qt::set_property_variant(mpv, name, value);
}
QQuickFramebufferObject::Renderer *MpvObject::createRenderer() const
{
window()->setPersistentOpenGLContext(true);
window()->setPersistentSceneGraph(true);
return new MpvRenderer(this);
}
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