From f26534ca8d7107b14fdd5a02cbadd56505d159de Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Thu, 8 Aug 2019 22:12:09 +0200
Subject: Switch from libmpv to mpv process with window embed

---
 include/Program.h       | 20 ++++++++++++
 include/VideoPlayer.hpp | 85 +++++++++++++++++++++++--------------------------
 2 files changed, 59 insertions(+), 46 deletions(-)

(limited to 'include')

diff --git a/include/Program.h b/include/Program.h
index ba7e523..69ee564 100644
--- a/include/Program.h
+++ b/include/Program.h
@@ -1,10 +1,18 @@
 #ifndef QUICKMEDIA_PROGRAM_H
 #define QUICKMEDIA_PROGRAM_H
 
+#include <sys/types.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef struct {
+    pid_t pid;
+    int read_fd;
+    int write_fd;
+} ProgramPipe;
+
 /* Return 0 if you want to continue reading. @data is null-terminated */
 typedef int (*ProgramOutputCallback)(char *data, int size, void *userdata);
 
@@ -14,6 +22,18 @@ typedef int (*ProgramOutputCallback)(char *data, int size, void *userdata);
 */
 int exec_program(const char **args, ProgramOutputCallback output_callback, void *userdata);
 
+/*
+    @args need to have at least 2 arguments. The first which is the program name
+    and the last which is NULL, which indicates end of args
+*/
+int exec_program_async(const char **args, pid_t *result_process_id);
+#if 0
+
+int program_pipe_write(ProgramPipe *self, const char *data, size_t size);
+int program_pipe_read(ProgramPipe *self, ProgramOutputCallback output_callback, void *userdata);
+void program_pipe_close(ProgramPipe *self);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/VideoPlayer.hpp b/include/VideoPlayer.hpp
index a9b177c..9d30dc5 100644
--- a/include/VideoPlayer.hpp
+++ b/include/VideoPlayer.hpp
@@ -1,63 +1,56 @@
 #pragma once
 
-#include <SFML/Graphics/RenderWindow.hpp>
-#include <SFML/Window/Event.hpp>
-#include <SFML/Graphics/Texture.hpp>
-#include <SFML/Graphics/Sprite.hpp>
-#include <SFML/Graphics/RectangleShape.hpp>
-#include <SFML/Window/Context.hpp>
-#include <thread>
-#include <mutex>
-#include <atomic>
-#include <stdexcept>
+#include <SFML/Window/WindowHandle.hpp>
+#include <SFML/System/Clock.hpp>
+#include <stdio.h>
 #include <functional>
+#include <thread>
 
-class mpv_handle;
-class mpv_render_context;
+#include <sys/un.h>
 
 namespace QuickMedia {
-    class VideoInitializationException : public std::runtime_error {
-    public:
-        VideoInitializationException(const std::string &errMsg) : std::runtime_error(errMsg) {}
-    };
+    using EventCallbackFunc = std::function<void(const char *event_name)>;
 
-    using PlaybackEndedCallback = std::function<void()>;
-    
+    // Currently this video player launches mpv and embeds it into the QuickMedia window
     class VideoPlayer {
     public:
-        // Throws VideoInitializationException on error
-        VideoPlayer(sf::RenderWindow *window, unsigned int width, unsigned int height, const char *file, bool loop = false);
-        ~VideoPlayer();
+        enum class Error {
+            OK,
+            FAIL_TO_LAUNCH_PROCESS,
+            FAIL_TO_CREATE_SOCKET,
+            FAIL_TO_GENERATE_IPC_FILENAME,
+            FAIL_TO_CONNECT_TIMEOUT,
+            FAIL_NOT_CONNECTED,
+            FAIL_TO_SEND,
+            INIT_FAILED
+        };
 
+        // @event_callback is called from another thread
+        VideoPlayer(EventCallbackFunc event_callback);
+        ~VideoPlayer();
         VideoPlayer(const VideoPlayer&) = delete;
         VideoPlayer& operator=(const VideoPlayer&) = delete;
-        
-        void handle_event(sf::Event &event);
-        void setPosition(float x, float y);
-        void resize(const sf::Vector2f &size);
-        void draw(sf::RenderWindow &window);
 
-        // @path can also be an url if youtube-dl is installed
-        void load_file(const std::string &path);
-        
-        // This is updated when mpv wants to render
-        std::atomic_bool redraw;
-        std::atomic_bool event_update;
-        // Important: Do not destroy the video player in this callback
-        PlaybackEndedCallback onPlaybackEndedCallback;
+        // @path can also be an url if youtube-dl is installed and accessible to mpv
+        Error load_video(const char *path, sf::WindowHandle parent_window);
+        // Should be called every update frame
+        Error update();
+
+        Error toggle_pause();
     private:
-        void handle_mpv_events();
+        Error send_command(const char *cmd, size_t size);
+        Error launch_video_process(const char *path, sf::WindowHandle parent_window);
+        void read_ipc_func();
     private:
-        mpv_handle *mpv;
-        mpv_render_context *mpvGl;
-        std::unique_ptr<sf::Context> context;
-        sf::Sprite sprite;
-        sf::Texture texture;
-        sf::Uint8 *textureBuffer;
-        sf::Vector2i video_size;
-        sf::Vector2f desired_size;
-        sf::RectangleShape seekbar;
-        sf::RectangleShape seekbar_background;
-        sf::Clock cursor_last_active_timer;
+        pid_t video_process_id;
+        int ipc_socket;
+        bool connected_to_ipc;
+        sf::Clock ipc_connect_retry_timer;
+        int connect_tries;
+        struct sockaddr_un ipc_addr;
+        char ipc_server_path[L_tmpnam];
+        EventCallbackFunc event_callback;
+        std::thread event_read_thread;
+        bool alive;
     };
 }
-- 
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