mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-05 07:56:35 +00:00
367 lines
11 KiB
C#
367 lines
11 KiB
C#
// Authors
|
|
// Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
|
|
|
|
using System;
|
|
using Gst;
|
|
using Gtk;
|
|
using System.Runtime.InteropServices;
|
|
using Gst.Video;
|
|
|
|
namespace GstreamerSharp
|
|
{
|
|
class Playback
|
|
{
|
|
static Element Playbin;
|
|
static Gtk.Range Slider;
|
|
static TextView StreamsList;
|
|
static ulong silderUpdateSignalID;
|
|
|
|
static State State;
|
|
static long Duration = -1;
|
|
static int ignoreCount = 0;
|
|
|
|
static void HandleValueChanged (object sender, EventArgs e)
|
|
{
|
|
var range = (Gtk.Range)sender;
|
|
var value = range.Value;
|
|
Playbin.SeekSimple (Format.Time, SeekFlags.Flush | SeekFlags.KeyUnit, (long)(value * Gst.Constants.SECOND));
|
|
}
|
|
|
|
// This method is called when the STOP button is clicked
|
|
static void HandleStop (object sender, EventArgs e)
|
|
{
|
|
Playbin.SetState (State.Ready);
|
|
}
|
|
|
|
// This method is called when the PAUSE button is clicked
|
|
static void HandlePause (object sender, EventArgs e)
|
|
{
|
|
Playbin.SetState (State.Paused);
|
|
}
|
|
|
|
// This method is called when the PLAY button is clicked
|
|
static void HandlePlay (object sender, EventArgs e)
|
|
{
|
|
Playbin.SetState (State.Playing);
|
|
|
|
}
|
|
|
|
static void HandleRealized (object sender, EventArgs e)
|
|
{
|
|
var widget = (Widget)sender;
|
|
var window = widget.Window;
|
|
IntPtr windowID = IntPtr.Zero;
|
|
|
|
// Retrieve window handler from GDK
|
|
switch (System.Environment.OSVersion.Platform) {
|
|
case PlatformID.Unix:
|
|
windowID = gdk_x11_window_get_xid (window.Handle);
|
|
break;
|
|
case PlatformID.Win32NT:
|
|
case PlatformID.Win32S:
|
|
case PlatformID.Win32Windows:
|
|
case PlatformID.WinCE:
|
|
windowID = gdk_win32_drawable_get_handle (window.Handle);
|
|
break;
|
|
}
|
|
|
|
Element overlay = null;
|
|
if(Playbin is Gst.Bin)
|
|
overlay = ((Gst.Bin) Playbin).GetByInterface (VideoOverlayAdapter.GType);
|
|
|
|
VideoOverlayAdapter adapter = new VideoOverlayAdapter (overlay.Handle);
|
|
adapter.WindowHandle = windowID;
|
|
adapter.HandleEvents (true);
|
|
}
|
|
|
|
// This function is called when the main window is closed
|
|
static void HandleDelete (object o, DeleteEventArgs args)
|
|
{
|
|
HandleStop (null, null);
|
|
Gtk.Application.Quit ();
|
|
}
|
|
|
|
//This function is called everytime the video window needs to be redrawn (due to damage/exposure, rescaling, etc). GStreamer takes care of this in the PAUSED and PLAYING states, otherwise, we simply draw a black rectangle to avoid garbage showing up. */
|
|
static void HandleDamage (object o, DamageEventArgs args)
|
|
{
|
|
var widget = (Widget)o;
|
|
|
|
if (State != State.Paused && State != State.Playing) {
|
|
var window = widget.Window;
|
|
var allocation = widget.Allocation;
|
|
|
|
var cr = Gdk.CairoHelper.Create (window);
|
|
cr.SetSourceRGB (0, 0, 0);
|
|
cr.Rectangle (0, 0, allocation.Width, allocation.Height);
|
|
cr.Fill ();
|
|
cr.Dispose ();
|
|
}
|
|
|
|
args.RetVal = false;
|
|
}
|
|
|
|
static void CreateUI () {
|
|
var mainWindow = new Window (WindowType.Toplevel);
|
|
mainWindow.DeleteEvent += HandleDelete;
|
|
|
|
var videoWindow = new DrawingArea ();
|
|
videoWindow.DoubleBuffered = false;
|
|
videoWindow.Realized += HandleRealized;
|
|
videoWindow.DamageEvent += HandleDamage;
|
|
|
|
var playButton = new Button (Stock.MediaPlay);
|
|
playButton.Clicked += HandlePlay;
|
|
|
|
var pauseButton = new Button (Stock.MediaPause);
|
|
pauseButton.Clicked += HandlePause;
|
|
|
|
var stopButton = new Button (Stock.MediaStop);
|
|
stopButton.Clicked += HandleStop;
|
|
|
|
Slider = new HScale (0, 100, 1);
|
|
((Scale)Slider).DrawValue = false;
|
|
Slider.ValueChanged += HandleValueChanged;
|
|
|
|
StreamsList = new TextView ();
|
|
StreamsList.Editable = false;
|
|
|
|
var controls = new HBox (false, 0);
|
|
controls.PackStart (playButton, false, false, 2);
|
|
controls.PackStart (pauseButton, false, false, 2);
|
|
controls.PackStart (stopButton, false, false, 2);
|
|
controls.PackStart (Slider, true, true, 2);
|
|
|
|
var mainHBox = new HBox (false, 0);
|
|
mainHBox.PackStart (videoWindow, true, true, 0);
|
|
mainHBox.PackStart (StreamsList, false, false, 2);
|
|
|
|
var mainBox = new VBox (false, 0);
|
|
mainBox.PackStart (mainHBox, true, true, 0);
|
|
mainBox.PackStart (controls, false, false, 0);
|
|
mainWindow.Add (mainBox);
|
|
mainWindow.SetDefaultSize (640, 480);
|
|
|
|
mainWindow.ShowAll ();
|
|
}
|
|
|
|
// This function is called periodically to refresh the GUI
|
|
static bool RefreshUI () {
|
|
var fmt = Format.Time;
|
|
long current = 0;
|
|
|
|
// We do not want to update anything nless we are in the PAUSED or PLAYING states
|
|
if (State != State.Playing && State != State.Paused)
|
|
return true;
|
|
|
|
// If we didn't know it yet, query the stream duration
|
|
if (Duration < 0) {
|
|
if (!Playbin.QueryDuration (fmt, out Duration))
|
|
Console.WriteLine ("Could not query the current duration.");
|
|
else {
|
|
// Set the range of the silder to the clip duration, in SECONDS
|
|
Slider.SetRange (0, Duration / (double)Gst.Constants.SECOND);
|
|
}
|
|
}
|
|
|
|
if (Playbin.QueryPosition (fmt, out current)) {
|
|
// Block the "value-changed" signal, so the HandleSlider function is not called (which would trigger a seek the user has not requested)
|
|
ignoreCount++;
|
|
Slider.ValueChanged -= HandleValueChanged;
|
|
// Set the position of the slider to the current pipeline position, in SECONDS
|
|
Slider.Value = current / (double)Gst.Constants.SECOND;
|
|
Slider.ValueChanged += HandleValueChanged;
|
|
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
// This function is called when an error message is posted on the bus
|
|
static void HandleTags (object sender, GLib.SignalArgs args) {
|
|
// We are possibly in the Gstreamer working thread, so we notify the main thread of this event through a message in the bus
|
|
var s = new Structure ("tags-changed");
|
|
Playbin.PostMessage (Message.NewApplication (Playbin, s));
|
|
}
|
|
|
|
// This function is called when an error message is posted on the bus
|
|
static void HandleError (object sender, GLib.SignalArgs args) {
|
|
var msg = (Message)args.Args [0];
|
|
string debug;
|
|
GLib.GException exc;
|
|
msg.ParseError (out exc, out debug);
|
|
Console.WriteLine (string.Format ("Error received from element {0}: {1}", msg.Src.Name, exc.Message));
|
|
Console.WriteLine ("Debugging information: {0}", debug);
|
|
// Set the pipeline to READY (which stops playback)
|
|
Playbin.SetState (State.Ready);
|
|
}
|
|
|
|
// This function is called when an End-Of-Stream message is posted on the bus. We just set the pipelien to READY (which stops playback)
|
|
static void HandleEos (object sender, GLib.SignalArgs args) {
|
|
Console.WriteLine ("End-Of-Stream reached.");
|
|
Playbin.SetState (State.Ready);
|
|
}
|
|
|
|
// This function is called when the pipeline changes states. We use it to keep track of the current state.
|
|
static void HandleStateChanged (object sender, GLib.SignalArgs args) {
|
|
var msg = (Message) args.Args [0];
|
|
State oldState, newState, pendingState;
|
|
msg.ParseStateChanged (out oldState, out newState, out pendingState);
|
|
if (msg.Src == Playbin) {
|
|
State = newState;
|
|
Console.WriteLine ("State set to {0}", Element.StateGetName (newState));
|
|
if (oldState == State.Ready && newState == State.Paused) {
|
|
// For extra responsiveness, we refresh the GUI as soon as we reach the PAUSED state
|
|
RefreshUI ();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// Extract metadata from all the streams and write it to the text widget in the GUI
|
|
static void AnalyzeStreams () {
|
|
TagList tags;
|
|
String str, totalStr;
|
|
uint rate;
|
|
|
|
// Clean current contents of the widget
|
|
var text = StreamsList.Buffer;
|
|
text.Text = String.Empty;
|
|
|
|
// Read some properties
|
|
var nVideo = (int) Playbin ["n-video"];
|
|
var nAudio = (int) Playbin ["n-audio"];
|
|
var nText = (int) Playbin ["n-text"];
|
|
|
|
for (int i = 0; i < nVideo; i++) {
|
|
// Retrieve the stream's video tags
|
|
tags = (TagList)Playbin.Emit ("get-video-tags", i);
|
|
|
|
if (tags != null) {
|
|
totalStr = string.Format ("video stream {0}:\n", i);
|
|
text.InsertAtCursor (totalStr);
|
|
tags.GetString (Gst.Constants.TAG_VIDEO_CODEC, out str);
|
|
totalStr = string.Format (" codec: {0}\n", str != null ? str : "unknown");
|
|
text.InsertAtCursor (totalStr);
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < nAudio; i++) {
|
|
// Retrieve the stream's audio tags
|
|
tags = (TagList)Playbin.Emit ("get-audio-tags", i);
|
|
|
|
if (tags != null) {
|
|
totalStr = string.Format ("audio stream {0}:\n", i);
|
|
text.InsertAtCursor (totalStr);
|
|
|
|
str = String.Empty;
|
|
if (tags.GetString (Gst.Constants.TAG_AUDIO_CODEC, out str)) {
|
|
totalStr = string.Format (" codec: {0}\n", str);
|
|
text.InsertAtCursor (totalStr);
|
|
}
|
|
str = String.Empty;
|
|
|
|
if (tags.GetString (Gst.Constants.TAG_LANGUAGE_CODE+"dr", out str)) {
|
|
totalStr = string.Format (" language: {0}\n", str);
|
|
text.InsertAtCursor (totalStr);
|
|
}
|
|
str = String.Empty;
|
|
|
|
if (tags.GetUint (Gst.Constants.TAG_BITRATE, out rate)) {
|
|
totalStr = string.Format (" bitrate: {0}\n", rate);
|
|
text.InsertAtCursor (totalStr);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < nText; i++) {
|
|
// Retrieve the stream's text tags
|
|
tags = (TagList)Playbin.Emit ("get-text-tags", i);
|
|
|
|
if (tags != null) {
|
|
totalStr = string.Format ("subtitle stream {0}:\n", i);
|
|
text.InsertAtCursor (totalStr);
|
|
|
|
if (tags.GetString (Gst.Constants.TAG_LANGUAGE_CODE, out str)) {
|
|
totalStr = string.Format (" language: {0}\n", str);
|
|
text.InsertAtCursor (totalStr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// This function is called when an "application" message is posted on the bus. Here we retrieve the message posted by the HandleTags callback
|
|
static void HandleApplication (object sender, GLib.SignalArgs args) {
|
|
var msg = (Message)args.Args [0];
|
|
|
|
if (msg.Structure.Name.Equals ("tags-changed")) {
|
|
// If the message is the "tags-changed" (only one we are currently issuing), update the stream info GUI
|
|
AnalyzeStreams ();
|
|
}
|
|
}
|
|
|
|
public static void Main (string[] args)
|
|
{
|
|
// Initialize GTK
|
|
Gtk.Application.Init ();
|
|
|
|
// Initialize Gstreamer
|
|
Gst.Application.Init(ref args);
|
|
|
|
// Create the elements
|
|
Playbin = ElementFactory.Make ("playbin", "playbin");
|
|
|
|
if (Playbin == null) {
|
|
Console.WriteLine ("Not all elements could be created");
|
|
return;
|
|
}
|
|
|
|
// Set the URI to play.
|
|
Playbin ["uri"] = "http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4";
|
|
|
|
// Connect to interesting signals in playbin
|
|
Playbin.Connect ("video-tags-changed", HandleTags);
|
|
Playbin.Connect ("audio-tags-changed", HandleTags);
|
|
Playbin.Connect ("text-tags-changed", HandleTags);
|
|
|
|
|
|
// Create the GUI
|
|
CreateUI ();
|
|
|
|
// Instruct the bus to emit signals for each received message, and connect to the interesting signals
|
|
var bus = Playbin.Bus;
|
|
bus.AddSignalWatch ();
|
|
bus.Connect ("message::error", HandleError);
|
|
bus.Connect ("message::eos", HandleEos);
|
|
bus.Connect ("message::state-changed", HandleStateChanged);
|
|
bus.Connect ("message::application", HandleApplication);
|
|
|
|
|
|
// Start playing
|
|
var ret = Playbin.SetState (State.Playing);
|
|
if (ret == StateChangeReturn.Failure) {
|
|
Console.WriteLine ("Unable to set the pipeline to the playing state.");
|
|
return;
|
|
}
|
|
|
|
// Register a function that GLib will call every second
|
|
GLib.Timeout.Add (1, RefreshUI);
|
|
|
|
// Start the GTK main loop- We will not regain control until gtk_main_quit is called
|
|
Gtk.Application.Run ();
|
|
|
|
// Free resources
|
|
Playbin.SetState (State.Null);
|
|
|
|
}
|
|
|
|
[DllImport ("libgdk-3.so.0") ]
|
|
static extern IntPtr gdk_x11_window_get_xid (IntPtr handle);
|
|
|
|
[DllImport ("gdk-win32-3.0-0.dll") ]
|
|
static extern IntPtr gdk_win32_drawable_get_handle (IntPtr handle);
|
|
|
|
[DllImport ("libX11.so.6")]
|
|
static extern int XInitThreads ();
|
|
}
|
|
}
|