欢迎使用CSDN-markdown编辑器
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首先定义了player.h的头文件,在里面声明了点击事件和页面更新的函数。
ifndef PLAYER_H
define PLAYER_H
include
endif
下面是player.c的函数
/**
gcc hellogtk.c -o hellogtk pkg-config --cflags --libs gtk+-2.0 --libs gstreamer-0.10
*/
include
include
include
include
include
include “player.h”
static GtkWidget *main_window;
static GtkWidget *play_button;
static GtkWidget *skip_button;
static GtkWidget *pause_button;
static GtkWidget *stop_button;
static GtkWidget *status_label;
static GtkWidget *song_label;
static GtkWidget *time_label;
static GtkWidget *seek_scale;
static GtkWidget *video_output;
static gpointer window;
static GstElement *play = NULL;
static GstElement *bin;
static guint timeout_source = 0;
static guint skip_time_source = 0;
static char *current_filename = NULL;
gboolean no_seek = FALSE;
gboolean is_pause_pressed = FALSE;
gboolean is_skip = FALSE;
// 打开文件
static void file_open(GtkAction *action)
{
GtkWidget *file_chooser = gtk_file_chooser_dialog_new( "Open File", GTK_WINDOW(main_window), GTK_FILE_CHOOSER_ACTION_OPEN, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, NULL); if (gtk_dialog_run(GTK_DIALOG(file_chooser)) == GTK_RESPONSE_ACCEPT) { char *filename; filename = gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(file_chooser)); // g_signal_emit_by_name(G_OBJECT(stop_button), "clicked"); if (current_filename) g_free(current_filename); current_filename = filename; g_print("current_filename===>%s",current_filename); //判断pause按钮是否按下 gtk_widget_set_sensitive(GTK_WIDGET(pause_button), FALSE); //chose the song to play if (load_file(filename)) gtk_widget_set_sensitive(GTK_WIDGET(play_button), TRUE); } gtk_widget_destroy(file_chooser);
}
// 退出
static void file_quit(GtkAction *action)
{
gtk_main_quit();
}
// 关于
static void help_about(GtkAction *action)
{
GtkWidget *about_dialog = gtk_about_dialog_new(); gtk_about_dialog_set_name(GTK_ABOUT_DIALOG(about_dialog), "MediaPlayer"); gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(about_dialog), "0.0.0"); gtk_about_dialog_set_copyright(GTK_ABOUT_DIALOG(about_dialog), "Copyright @ 2011, Figo"); gtk_dialog_run(GTK_DIALOG(about_dialog)); gtk_widget_destroy(about_dialog);
}
static GtkActionEntry mainwindow_action_entries[] = {
{ "FileMenu", "NULL", "文件" }, { "OpenFile", GTK_STOCK_OPEN, "打开(O)", "<control>O", "Open a file for playback", G_CALLBACK(file_open) }, { "QuitPlayer", GTK_STOCK_QUIT, "退出(Q)", "<control>Q", "Quit the media player", G_CALLBACK(file_quit) }, { "HelpMenu", "NULL", "帮助" }, { "HelpAbout", GTK_STOCK_ABOUT, "关于", "", "About the media player", G_CALLBACK(help_about) }
};
GtkWidget *build_gui()
{
GtkWidget *main_vbox; GtkWidget *status_hbox; GtkWidget *controls_hbox; GtkWidget *saturation_controls_hbox; GtkActionGroup *actiongroup; GtkUIManager *ui_manager; actiongroup = gtk_action_group_new("MainwindowActiongroup"); gtk_action_group_add_actions(actiongroup, mainwindow_action_entries, G_N_ELEMENTS(mainwindow_action_entries), NULL); ui_manager = gtk_ui_manager_new(); gtk_ui_manager_insert_action_group(ui_manager, actiongroup, 0); gtk_ui_manager_add_ui_from_string( ui_manager, "<ui>" " <menubar name='MainMenu'>" " <menu action='FileMenu'>" " <menuitem action='OpenFile'/>" " <separator name='fsep1'/>" " <menuitem action='QuitPlayer'/>" " </menu>" " <menu action='HelpMenu'>" " <menuitem action='HelpAbout'/>" " </menu>" " </menubar>" "</ui>", -1, NULL); // 创建主 GtkVBOx. 其他所有都在它里面 // 0:各个构件高度可能不同,6:构件之间的间距为6 像素 main_vbox = gtk_vbox_new(0, 0); // 添加菜单栏 gtk_box_pack_start( GTK_BOX(main_vbox), gtk_ui_manager_get_widget(ui_manager, "/ui/MainMenu"), FALSE, FALSE, 0); // 视频显示区域 video_output = gtk_drawing_area_new (); gtk_box_pack_start (GTK_BOX (main_vbox), video_output, TRUE, TRUE, 0); //gtk_widget_set_size_request (video_output, 0x200, 0x100); gtk_widget_set_size_request (video_output, 672, 378); gtk_widget_show (video_output); // 滑动条控制 seek_scale = gtk_hscale_new_with_range(0, 100, 1); gtk_scale_set_draw_value(GTK_SCALE(seek_scale), FALSE); gtk_range_set_update_policy(GTK_RANGE(seek_scale), GTK_UPDATE_DISCONTINUOUS); g_signal_connect(G_OBJECT(seek_scale), "value-changed", G_CALLBACK(seek_value_changed), NULL); gtk_box_pack_start(GTK_BOX(main_vbox), seek_scale, FALSE, FALSE, 0); // controls_hbox controls_hbox = gtk_hbox_new(TRUE, 6); gtk_box_pack_start_defaults(GTK_BOX(main_vbox), controls_hbox); // 播放按钮 play_button = gtk_button_new_from_stock(GTK_STOCK_MEDIA_PLAY); // 设置“敏感”属性,FALSE 表示为灰色,不响应鼠标键盘事件 gtk_widget_set_sensitive(play_button, FALSE); g_signal_connect(G_OBJECT(play_button), "clicked", G_CALLBACK(play_clicked), NULL); gtk_box_pack_start_defaults(GTK_BOX(controls_hbox), play_button); // 暂停按钮,为使按下时停留在按下状态,使用GtkToggleButton pause_button = gtk_toggle_button_new_with_label(GTK_STOCK_MEDIA_PAUSE); // 将按钮设置为固化按钮 gtk_button_set_use_stock(GTK_BUTTON(pause_button), TRUE); gtk_widget_set_sensitive(pause_button, FALSE); g_signal_connect(G_OBJECT(pause_button), "clicked", G_CALLBACK(pause_clicked), NULL); gtk_box_pack_start_defaults(GTK_BOX(controls_hbox), pause_button);
// 快进按钮
skip_button = gtk_button_new_from_stock(GTK_STOCK_MEDIA_FORWARD);
gtk_widget_set_sensitive(skip_button, FALSE);
g_signal_connect(G_OBJECT(skip_button), “clicked”, G_CALLBACK(skip_clicked), NULL);
gtk_box_pack_start_defaults(GTK_BOX(controls_hbox), skip_button);
// 停止按钮
stop_button = gtk_button_new_from_stock(GTK_STOCK_MEDIA_STOP);
gtk_widget_set_sensitive(stop_button, FALSE);
g_signal_connect(G_OBJECT(stop_button), “clicked”, G_CALLBACK(stop_clicked), NULL);
gtk_box_pack_start_defaults(GTK_BOX(controls_hbox), stop_button);
// status_hbox status_hbox = gtk_hbox_new(TRUE, 0); gtk_box_pack_start(GTK_BOX(main_vbox), status_hbox, FALSE, FALSE, 0); // 状态标签 status_label = gtk_label_new("<b>已停止</b>"); gtk_label_set_use_markup(GTK_LABEL(status_label), TRUE); gtk_misc_set_alignment(GTK_MISC(status_label), 0.0, 0.5); gtk_box_pack_start(GTK_BOX(status_hbox), status_label, TRUE, TRUE, 0); // 歌曲信息 song_label = gtk_label_new("<b>无歌曲信息</b>"); gtk_label_set_use_markup(GTK_LABEL(song_label), TRUE); gtk_misc_set_alignment(GTK_MISC(song_label), 0.0, 0.5); gtk_box_pack_start(GTK_BOX(status_hbox), song_label, TRUE, TRUE, 0); // 时间标签 time_label = gtk_label_new("00:00:00"); gtk_misc_set_alignment(GTK_MISC(time_label), 0.5, 1.0); gtk_box_pack_start(GTK_BOX(status_hbox), time_label, TRUE, TRUE, 0); return main_vbox;
}
// destory main window
static void destroy(GtkWidget *widget, gpointer data)
{
gtk_main_quit();
}
// 更新播放时间
void gui_update_time(const gchar *time, const gint64 position, const gint64 length)
{
gtk_label_set_text(GTK_LABEL(time_label), time);
if (length > 0) {
no_seek = TRUE;
gtk_range_set_value(GTK_RANGE(seek_scale), ((gdouble)position / (gdouble)length) * 100.0);
no_seek = FALSE;
}
}
// 更新播放状态
void gui_status_update(PlayerState state)
{
switch (state) {
case STATE_STOP:
is_skip = FALSE;
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(pause_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), FALSE);
gtk_label_set_markup(GTK_LABEL(status_label), “已停止“);
gtk_range_set_value(GTK_RANGE(seek_scale), 0.0);
gtk_label_set_text(GTK_LABEL(time_label), “00:00:00”);
gtk_label_set_markup(GTK_LABEL(song_label), “无歌曲信息“);
break;
case STATE_SKIP:
gtk_label_set_markup(GTK_LABEL(status_label), “快速播放“);
break;
case STATE_PLAY:
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(pause_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), TRUE);
gtk_label_set_markup(GTK_LABEL(status_label), “播放中“);
gtk_label_set_markup(GTK_LABEL(song_label), current_filename); break; case STATE_PAUSE: gtk_label_set_markup(GTK_LABEL(status_label), "<b>已暂停</b>"); break; default: break; }
}
//play按钮点击事件
static void play_clicked(GtkWidget *widget, gpointer data)
{
if (current_filename) {
if (play_file()) {
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(pause_button), TRUE);
// g_print(“Play was pressed\n”);
gui_status_update(STATE_PLAY);
g_print(“Play\n”);
}
else {
g_print(“Failed to play\n”);
}
}
}
//pause按钮点击事件
static void pause_clicked(GtkWidget *widget, gpointer data)
{
if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget)))
{
if(is_skip){
if(skip_time_source){
g_source_remove(skip_time_source);
skip_time_source = 0;}
}
gst_element_set_state(play,GST_STATE_PAUSED);
GstStateChangeReturn statechange;
statechange = gst_element_set_state(play, GST_STATE_PAUSED);
gtk_widget_set_sensitive(GTK_WIDGET(play_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(stop_button), FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), FALSE);
gui_status_update(STATE_PAUSE);
g_print(“Pause\n”);
// g_print(“Pause was pressed\n”);
}
else
{
// g_print(“Pause was pressed\n”);
if(is_skip){
skip_time_source = g_timeout_add(200, (GSourceFunc)skip_time_callback, play);;
}
gtk_widget_set_sensitive(GTK_WIDGET(play_button), TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), TRUE);
gst_element_set_state(play,GST_STATE_PLAYING);
gui_status_update(STATE_PLAY);
g_print(“Resume to play\n”);
}
}
//stop按钮点击事件
static void stop_clicked(GtkWidget *widget, gpointer data)
{
is_skip = FALSE;
if (timeout_source)
g_source_remove(timeout_source);
timeout_source = 0;
gtk_widget_set_sensitive(GTK_WIDGET(skip_button), FALSE);
// g_print(“Stop was pressed\n”);
gst_element_set_state(play,GST_STATE_NULL);
//停止之后正常播放,不在跳播
if (timeout_source){
g_source_remove(timeout_source);
timeout_source = 0;
}
if(skip_time_source){
g_source_remove(skip_time_source);
skip_time_source = 0;
}
timeout_source = g_timeout_add(200, (GSourceFunc)update_time_callback, play);
// gst_object_unref(GST_OBJECT(play));//不用销毁管道
gui_status_update(STATE_STOP);
g_print(“Deleting pipeline\n”);
g_print(“Stop\n”);
}
//skip按钮点击事件
static void skip_clicked(GtkWidget *widget, gpointer data)
{
is_skip = TRUE;
g_print(“skip_clicked\n”);
//取消正常播放的查询事件
if (timeout_source)
g_source_remove(timeout_source);
timeout_source = 0;
skip_time_source = g_timeout_add(200, (GSourceFunc)skip_time_callback, play);
gui_status_update(STATE_SKIP);
}
//快进播放模式更新页面
static gboolean skip_time_callback(GstElement *pipeline)
{
if(is_skip){
GstFormat fmt = GST_FORMAT_TIME;
gint64 position;
gint64 length;
gchar time_buffer[25];
if (gst_element_query_position(pipeline, &fmt, &position)
&& gst_element_query_duration(pipeline, &fmt, &length)) {
g_snprintf(time_buffer, 24, “%u:%02u:%02u”, GST_TIME_ARGS(position));
position += 4000000000;
//跳4秒播放一次
if (!gst_element_seek(play, 1.0, GST_FORMAT_TIME,
GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET,
position, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
g_print(“Failed to seek to desired position\n”);
// 播放完成
if(position >=length ){
if (skip_time_source)
g_source_remove(skip_time_source);
skip_time_source = 0;
gui_status_update(STATE_STOP);
}
gui_update_time(time_buffer, position, length);
}
return TRUE;
}
}
/* 进度条的拖动事件 */
static void seek_value_changed(GtkRange *range, gpointer data)
{
if (no_seek)
return;
gdouble val = gtk_range_get_value(range);
seek_to(val);
}
/* 处理进度条的拖动事件 */
void seek_to(gdouble percentage)
{
GstFormat fmt = GST_FORMAT_TIME;
gint64 length;
/* If it seems safe to attempt a seek… */
if (play && gst_element_query_duration(play, &fmt, &length)) {
/* …calculate where to seek to */
gint64 target = ((gdouble)length * (percentage / 100.0));
/* …and attempt the seek */
if (!gst_element_seek(play, 1.0, GST_FORMAT_TIME,
GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET,
target, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
g_print(“Failed to seek to desired position\n”);
}
}
//pipeline的信号处理函数
static gboolean bus_callback(GstBus *bus, GstMessage *message, gpointer data)
{
switch (GST_MESSAGE_TYPE(message)) {
case GST_MESSAGE_ERROR:
{
GError *err;
gchar *debug;
gst_message_parse_error(message, &err, &debug);
g_print(“Error: %s\n”, err->message);
g_error_free(err);
g_free(debug);
gtk_main_quit();
break;
}
case GST_MESSAGE_EOS:
{
g_print(“End of stream\n”);
// stop_playback();
// stop_clicked(GtkWidget *widget, gpointer data);
if (timeout_source)
g_source_remove(timeout_source);
timeout_source = 0;
gst_element_set_state(play, GST_STATE_NULL);
gui_status_update(STATE_STOP);
break;
}
default:
break;
}
return TRUE;
}
//创建一个pipeline
static gboolean build_gstreamer_pipeline(const gchar *uri)
{
// 创建一个playbin 元素
play = gst_element_factory_make (“playbin2”, “play”);
GstBus *bus;
bus = gst_pipeline_get_bus (GST_PIPELINE (play));
gst_bus_add_watch (bus, bus_callback, NULL);
gst_object_unref (bus);
g_object_set (G_OBJECT (play), “uri”, uri, NULL);
return TRUE;
}
// load file to play
gboolean load_file(const gchar *uri)
{
if (build_gstreamer_pipeline(uri))
return TRUE;
return FALSE;
}
static gboolean update_time_callback(GstElement *pipeline)
{
GstFormat fmt = GST_FORMAT_TIME;
gint64 position;
gint64 length;
gchar time_buffer[25];
if (gst_element_query_position(pipeline, &fmt, &position)
&& gst_element_query_duration(pipeline, &fmt, &length)) {
g_snprintf(time_buffer, 24, “%u:%02u:%02u”, GST_TIME_ARGS(position));
g_print(“duration====%llu,position===%llu\n”,length,position);
gui_update_time(time_buffer, position, length);
}
return TRUE;
}
gboolean play_file()
{
if (play) {
/* Start playing */
gst_element_set_state(play, GST_STATE_PLAYING);
gui_status_update(STATE_PLAY);
/* Connect a callback to trigger every 200 milliseconds to
* update the GUI with the playback progress. We remember
* the ID of this source so that we can remove it when we stop
* playing */
timeout_source = g_timeout_add(200, (GSourceFunc)update_time_callback, play);
return TRUE;
}
return FALSE;
}
int main(int argc, char *argv[])
{
// 初始化 GTK+
gtk_init(&argc, &argv);
gst_init(&argc, &argv);
// 创建窗口
main_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
// 设置窗口标题
gtk_window_set_title(GTK_WINDOW(main_window), “MediaPlayer”);
// 主窗口销毁句柄
g_signal_connect(G_OBJECT(main_window), “destroy”, G_CALLBACK(destroy), NULL);
// 创建主窗口GUI
gtk_container_add(GTK_CONTAINER(main_window), build_gui());
// 显示
gtk_widget_show_all(GTK_WIDGET(main_window));
// 开始主循环
gtk_main();
return 0;
}
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