add mpv demo

src/main.cpp

@@ -1,6 +1,9 @@
 #include <cstdio>
 #include <cstdlib>
 
+#include <mpv/client.h>
+#include <mpv/render_gl.h>
+
 #define GLFW_INCLUDE_NONE
 #include <GLFW/glfw3.h>
 
@@ -20,24 +23,56 @@ extern "C" void userAppExit() {
 }
 #endif
 
+static void die(const char* msg) {
+    fprintf(stderr, "%s\n", msg);
+    exit(1);
+}
 
 // Main code
 int main(int argc, char* argv[]) {
-    if (!glfwInit()) return -1;
+    if (argc < 2) die("pass a single media file as argument");
+
+    if (!glfwInit()) die("init glfw failed");
+
+    mpv_render_context* mpv_context = nullptr;
+    mpv_handle* mpv = mpv_create();
+    mpv_set_option_string(mpv, "subs-fallback", "yes");
+    mpv_set_option_string(mpv, "video-timing-offset", "0");  // 60fps
+    mpv_set_option_string(mpv, "vd-lavc-dr", "yes");
+    mpv_set_option_string(mpv, "terminal", "yes");
+    mpv_set_option_string(mpv, "ytdl", "no");
+    mpv_set_option_string(mpv, "hwdec", "auto");
+#ifdef _DEBUG
+    mpv_set_option_string(this->mpv, "msg-level", "all=v");
+#endif
+    if (mpv_initialize(mpv) < 0) die("init mpv failed");
 
-    static int osdShow = 0;
     // Create window with graphics context
-    GLFWwindow* window = glfwCreateWindow(1280, 720, "xPlayer", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(1280, 720, argv[1], nullptr, nullptr);
     if (!window) {
         glfwTerminate();
         return -1;
     }
+    glfwSetWindowUserPointer(window, mpv);
     glfwSetKeyCallback(window, [](GLFWwindow* window, int key, int scancode, int action, int mods) {
+        mpv_handle* mpv = static_cast<mpv_handle*>(glfwGetWindowUserPointer(window));
         if (action == GLFW_PRESS) {
             if (key == GLFW_KEY_ESCAPE)
                 glfwSetWindowShouldClose(window, 1);
             else if (key == GLFW_KEY_ENTER)
-                osdShow = !osdShow;
+                mpv_command_string(mpv, "script-binding stats/display-stats-toggle");
+            else if (key == GLFW_KEY_SPACE)
+                mpv_command_string(mpv, "cycle pause");
+            else if (key == GLFW_KEY_LEFT)
+                mpv_command_string(mpv, "seek -15");
+            else if (key == GLFW_KEY_RIGHT)
+                mpv_command_string(mpv, "seek 15");
+            else if (key == GLFW_KEY_UP)
+                mpv_command_string(mpv, "playlist-prev");
+            else if (key == GLFW_KEY_DOWN)
+                mpv_command_string(mpv, "playlist-next");
+            else
+                printf("glfwKeyCallback key press %d\n", key);
         }
     });
 
@@ -45,14 +80,45 @@ int main(int argc, char* argv[]) {
     glfwSwapInterval(1);
     glfwSetTime(0);
 
+    mpv_opengl_init_params gl_init_params{
+        [](void* fn_ctx, const char* name) { return (void*)glfwGetProcAddress(name); }, nullptr};
+    mpv_render_param params[] = {
+        {MPV_RENDER_PARAM_API_TYPE, const_cast<char*>(MPV_RENDER_API_TYPE_OPENGL)},
+        {MPV_RENDER_PARAM_OPENGL_INIT_PARAMS, &gl_init_params},
+        {MPV_RENDER_PARAM_INVALID, nullptr},
+    };
+    if (mpv_render_context_create(&mpv_context, mpv, params) < 0) die("init mpv context failed");
+    mpv_render_context_set_update_callback(
+        mpv_context,
+        [](void* obj) {
+            mpv_render_context* ctx = static_cast<mpv_render_context*>(obj);
+            uint64_t flags = mpv_render_context_update(ctx);
+            if (flags & MPV_RENDER_UPDATE_FRAME) glfwPostEmptyEvent();
+        },
+        mpv_context);
+
+    const char* args[] = {"loadfile", argv[1], nullptr};
+    if (mpv_command_async(mpv, 0, args) < 0) die("load file failed");
+
     int fbw = 0, fbh = 0;
     // Main loop
     while (!glfwWindowShouldClose(window)) {
         glfwGetFramebufferSize(window, &fbw, &fbh);
-
+        mpv_opengl_fbo mpv_fbo{0, fbw, fbh};
+        int flip_y{1};
+        mpv_render_param mpv_params[3] = {
+            {MPV_RENDER_PARAM_OPENGL_FBO, &mpv_fbo},
+            {MPV_RENDER_PARAM_FLIP_Y, &flip_y},
+            {MPV_RENDER_PARAM_INVALID, nullptr},
+        };
+        mpv_render_context_render(mpv_context, mpv_params);
         glfwSwapBuffers(window);
         glfwWaitEvents();
     }
+
+    mpv_render_context_free(mpv_context);
+    mpv_terminate_destroy(mpv);
+
     glfwDestroyWindow(window);
     glfwTerminate();