412 lines
15 KiB
C++
412 lines
15 KiB
C++
#include "mpv_plugin.h"
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#include <cstring>
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/// Plugin structure definition.
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struct _MpvPlugin {
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GObject parent_instance;
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FlPluginRegistrar* registrar;
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FlMethodChannel* method_channel;
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FlEventChannel* event_channel;
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FlBasicMessageChannel* event_message_channel;
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GtkOverlay* overlay;
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GtkGLArea* gl_area;
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GtkWidget* flutter_view;
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std::unique_ptr<mpv::MpvPlayer> player;
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gboolean visible;
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gboolean initialized;
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};
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G_DEFINE_TYPE(MpvPlugin, mpv_plugin, G_TYPE_OBJECT)
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// Forward declarations
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static void mpv_plugin_handle_method_call(FlMethodChannel* channel,
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FlMethodCall* method_call,
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gpointer user_data);
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static gboolean on_gl_render(GtkGLArea* area,
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GdkGLContext* context,
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gpointer user_data);
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static void on_gl_realize(GtkGLArea* area, gpointer user_data);
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static void on_gl_unrealize(GtkGLArea* area, gpointer user_data);
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static void mpv_plugin_dispose(GObject* object) {
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MpvPlugin* self = MPV_PLUGIN(object);
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if (self->player) {
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self->player->Dispose();
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self->player.reset();
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}
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g_clear_object(&self->method_channel);
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g_clear_object(&self->event_channel);
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g_clear_object(&self->registrar);
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G_OBJECT_CLASS(mpv_plugin_parent_class)->dispose(object);
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}
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static void mpv_plugin_class_init(MpvPluginClass* klass) {
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G_OBJECT_CLASS(klass)->dispose = mpv_plugin_dispose;
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}
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static void mpv_plugin_init(MpvPlugin* self) {
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self->visible = FALSE;
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self->initialized = FALSE;
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}
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/// Send an event through the event channel.
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static void send_event(MpvPlugin* self, FlValue* event) {
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if (self->event_channel) {
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g_autoptr(GError) error = nullptr;
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if (!fl_event_channel_send(self->event_channel, event, nullptr, &error)) {
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if (error != nullptr) {
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g_warning("Failed to send event: %s", error->message);
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}
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}
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}
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}
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MpvPlugin* mpv_plugin_new(FlPluginRegistrar* registrar,
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GtkOverlay* overlay,
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GtkGLArea* gl_area,
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GtkWidget* flutter_view) {
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MpvPlugin* self = MPV_PLUGIN(g_object_new(MPV_PLUGIN_TYPE, nullptr));
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self->registrar = FL_PLUGIN_REGISTRAR(g_object_ref(registrar));
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self->overlay = overlay;
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self->gl_area = gl_area;
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self->flutter_view = flutter_view;
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self->player = std::make_unique<mpv::MpvPlayer>();
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// Create method channel.
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g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
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self->method_channel = fl_method_channel_new(
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fl_plugin_registrar_get_messenger(registrar),
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"com.plezy/mpv_player",
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FL_METHOD_CODEC(codec));
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fl_method_channel_set_method_call_handler(
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self->method_channel,
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mpv_plugin_handle_method_call,
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self,
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nullptr);
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// Create event channel.
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self->event_channel = fl_event_channel_new(
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fl_plugin_registrar_get_messenger(registrar),
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"com.plezy/mpv_player/events",
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FL_METHOD_CODEC(codec));
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// Connect GtkGLArea signals.
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g_signal_connect(gl_area, "render", G_CALLBACK(on_gl_render), self);
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g_signal_connect(gl_area, "realize", G_CALLBACK(on_gl_realize), self);
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g_signal_connect(gl_area, "unrealize", G_CALLBACK(on_gl_unrealize), self);
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// Set up auto-render to false - we control when to render.
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gtk_gl_area_set_auto_render(gl_area, FALSE);
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// Use OpenGL 3.3 core profile.
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gtk_gl_area_set_required_version(gl_area, 3, 3);
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return self;
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}
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// Static reference to keep the plugin alive for the lifetime of the app.
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// The plugin will be disposed when the GL area is unrealized.
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static MpvPlugin* g_mpv_plugin = nullptr;
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void mpv_plugin_register_with_registrar(FlPluginRegistrar* registrar,
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GtkOverlay* overlay,
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GtkGLArea* gl_area,
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GtkWidget* flutter_view) {
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g_mpv_plugin = mpv_plugin_new(registrar, overlay, gl_area, flutter_view);
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// Keep a reference - the plugin will be cleaned up when the app exits
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}
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/// GtkGLArea render callback.
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static gboolean on_gl_render(GtkGLArea* area,
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GdkGLContext* context,
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gpointer user_data) {
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(void)context;
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MpvPlugin* self = MPV_PLUGIN(user_data);
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if (!self->player || !self->player->IsInitialized() || !self->visible) {
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// Clear to transparent when not showing video.
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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return TRUE;
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}
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int width = gtk_widget_get_allocated_width(GTK_WIDGET(area));
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int height = gtk_widget_get_allocated_height(GTK_WIDGET(area));
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// Get the scale factor for HiDPI support.
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int scale = gtk_widget_get_scale_factor(GTK_WIDGET(area));
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width *= scale;
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height *= scale;
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// Get the FBO that GtkGLArea is rendering to.
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// GtkGLArea uses its own FBO, not the default framebuffer (0).
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GLint fbo = 0;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &fbo);
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// Render the video frame.
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self->player->Render(width, height, fbo);
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self->player->ClearRedrawFlag();
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return TRUE;
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}
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/// GtkGLArea realize callback.
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static void on_gl_realize(GtkGLArea* area, gpointer user_data) {
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(void)user_data;
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gtk_gl_area_make_current(area);
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// Check for GL errors.
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GError* error = gtk_gl_area_get_error(area);
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if (error != nullptr) {
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g_warning("MPV Plugin: GL area error: %s", error->message);
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return;
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}
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// Enable blending for transparency support.
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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g_message("MPV Plugin: GL area realized");
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}
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/// GtkGLArea unrealize callback.
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static void on_gl_unrealize(GtkGLArea* area, gpointer user_data) {
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MpvPlugin* self = MPV_PLUGIN(user_data);
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gtk_gl_area_make_current(area);
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if (self->player) {
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self->player->Dispose();
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}
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g_message("MPV Plugin: GL area unrealized");
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}
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/// Method call handler.
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static void mpv_plugin_handle_method_call(FlMethodChannel* channel,
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FlMethodCall* method_call,
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gpointer user_data) {
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(void)channel;
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MpvPlugin* self = MPV_PLUGIN(user_data);
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const gchar* method = fl_method_call_get_name(method_call);
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FlValue* args = fl_method_call_get_args(method_call);
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g_autoptr(FlMethodResponse) response = nullptr;
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if (strcmp(method, "initialize") == 0) {
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if (self->initialized) {
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response = FL_METHOD_RESPONSE(
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fl_method_success_response_new(fl_value_new_bool(TRUE)));
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} else {
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// Create player if it was disposed
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if (!self->player) {
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self->player = std::make_unique<mpv::MpvPlayer>();
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}
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// Check if GL area is realized before trying to use it
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if (!gtk_widget_get_realized(GTK_WIDGET(self->gl_area))) {
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// Force realization of the GL area
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gtk_widget_realize(GTK_WIDGET(self->gl_area));
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}
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// Initialize the player with the GL area.
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gtk_gl_area_make_current(self->gl_area);
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GError* error = gtk_gl_area_get_error(self->gl_area);
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if (error != nullptr) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"GL_ERROR", error->message, nullptr));
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} else if (self->player->Initialize(self->gl_area)) {
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self->initialized = TRUE;
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// Set up event callback.
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self->player->SetEventCallback([self](FlValue* event) {
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// Send event - must be called from main thread
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// The event is already created on the main thread via g_idle_add in mpv_player.cc
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send_event(self, event);
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});
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response = FL_METHOD_RESPONSE(
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fl_method_success_response_new(fl_value_new_bool(TRUE)));
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} else {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INIT_FAILED", "Failed to initialize MPV player", nullptr));
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}
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}
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} else if (strcmp(method, "dispose") == 0) {
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if (self->player) {
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// Make GL context current before disposing mpv GL resources
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gtk_gl_area_make_current(self->gl_area);
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self->player->Dispose();
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self->player.reset();
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}
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self->initialized = FALSE;
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self->visible = FALSE;
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gtk_widget_set_visible(GTK_WIDGET(self->gl_area), FALSE);
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// Restore Flutter view opacity to 1.0 (may have been set to 0 by setControlsVisible)
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if (self->flutter_view != nullptr) {
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gtk_widget_set_opacity(self->flutter_view, 1.0);
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// Force Flutter view to redraw
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gtk_widget_queue_draw(self->flutter_view);
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}
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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} else if (strcmp(method, "command") == 0) {
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if (!self->player || !self->initialized) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"NOT_INITIALIZED", "Player not initialized", nullptr));
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} else {
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FlValue* args_value = fl_value_lookup_string(args, "args");
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if (args_value == nullptr ||
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fl_value_get_type(args_value) != FL_VALUE_TYPE_LIST) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'args' list", nullptr));
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} else {
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std::vector<std::string> command_args;
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size_t len = fl_value_get_length(args_value);
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for (size_t i = 0; i < len; i++) {
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FlValue* item = fl_value_get_list_value(args_value, i);
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if (fl_value_get_type(item) == FL_VALUE_TYPE_STRING) {
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command_args.push_back(fl_value_get_string(item));
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}
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}
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self->player->Command(command_args);
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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}
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}
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} else if (strcmp(method, "setProperty") == 0) {
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if (!self->player || !self->initialized) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"NOT_INITIALIZED", "Player not initialized", nullptr));
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} else {
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FlValue* name_value = fl_value_lookup_string(args, "name");
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FlValue* value_value = fl_value_lookup_string(args, "value");
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if (name_value == nullptr ||
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fl_value_get_type(name_value) != FL_VALUE_TYPE_STRING) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'name'", nullptr));
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} else if (value_value == nullptr ||
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fl_value_get_type(value_value) != FL_VALUE_TYPE_STRING) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'value'", nullptr));
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} else {
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self->player->SetProperty(fl_value_get_string(name_value),
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fl_value_get_string(value_value));
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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}
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}
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} else if (strcmp(method, "getProperty") == 0) {
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if (!self->player || !self->initialized) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"NOT_INITIALIZED", "Player not initialized", nullptr));
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} else {
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FlValue* name_value = fl_value_lookup_string(args, "name");
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if (name_value == nullptr ||
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fl_value_get_type(name_value) != FL_VALUE_TYPE_STRING) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'name'", nullptr));
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} else {
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std::string value =
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self->player->GetProperty(fl_value_get_string(name_value));
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if (value.empty()) {
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response =
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FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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} else {
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(
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fl_value_new_string(value.c_str())));
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}
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}
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}
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} else if (strcmp(method, "observeProperty") == 0) {
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if (!self->player || !self->initialized) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"NOT_INITIALIZED", "Player not initialized", nullptr));
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} else {
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FlValue* name_value = fl_value_lookup_string(args, "name");
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FlValue* format_value = fl_value_lookup_string(args, "format");
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if (name_value == nullptr ||
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fl_value_get_type(name_value) != FL_VALUE_TYPE_STRING) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'name'", nullptr));
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} else if (format_value == nullptr ||
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fl_value_get_type(format_value) != FL_VALUE_TYPE_STRING) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'format'", nullptr));
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} else {
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self->player->ObserveProperty(fl_value_get_string(name_value),
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fl_value_get_string(format_value));
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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}
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}
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} else if (strcmp(method, "setVisible") == 0) {
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FlValue* visible_value = fl_value_lookup_string(args, "visible");
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if (visible_value == nullptr ||
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fl_value_get_type(visible_value) != FL_VALUE_TYPE_BOOL) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'visible'", nullptr));
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} else {
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gboolean visible = fl_value_get_bool(visible_value);
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self->visible = visible;
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// Show/hide the GL area.
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gtk_widget_set_visible(GTK_WIDGET(self->gl_area), visible);
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if (visible) {
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gtk_gl_area_queue_render(self->gl_area);
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}
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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}
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} else if (strcmp(method, "setVideoRect") == 0) {
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// On Linux, the GtkGLArea fills the entire overlay area,
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// and mpv handles its own aspect ratio. So we just trigger a redraw.
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if (self->player && self->initialized && self->visible) {
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gtk_gl_area_queue_render(self->gl_area);
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}
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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} else if (strcmp(method, "setControlsVisible") == 0) {
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// Set Flutter view opacity when controls are hidden/shown.
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// This is a workaround for Flutter's lack of transparency support on Linux.
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// When controls are hidden, setting opacity to 0 shows only the video
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// while keeping the widget interactive for mouse events.
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FlValue* controls_visible_value = fl_value_lookup_string(args, "visible");
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if (controls_visible_value == nullptr ||
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fl_value_get_type(controls_visible_value) != FL_VALUE_TYPE_BOOL) {
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response = FL_METHOD_RESPONSE(fl_method_error_response_new(
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"INVALID_ARGS", "Missing 'visible'", nullptr));
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} else {
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gboolean controls_visible = fl_value_get_bool(controls_visible_value);
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// When controls are hidden, set Flutter view opacity to 0.
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// When controls are visible, set opacity to 1.
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// Using opacity keeps the widget interactive for mouse events.
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if (self->flutter_view != nullptr) {
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gtk_widget_set_opacity(self->flutter_view, controls_visible ? 1.0 : 0.0);
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}
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response = FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
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}
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} else if (strcmp(method, "isInitialized") == 0) {
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gboolean initialized = self->player && self->initialized;
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response = FL_METHOD_RESPONSE(
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fl_method_success_response_new(fl_value_new_bool(initialized)));
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} else {
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response = FL_METHOD_RESPONSE(fl_method_not_implemented_response_new());
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}
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fl_method_call_respond(method_call, response, nullptr);
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}
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