mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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161 lines
3.7 KiB
C#
161 lines
3.7 KiB
C#
//
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// Authors
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// Khaled Mohammed (khaled.mohammed@gmail.com)
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//
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// (C) 2006
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//
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using Gst;
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using System;
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public class MetaData
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{
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static Element pipeline = null;
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static Element source = null;
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static void PrintTag( TagList list, string tag) {
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uint count = list.GetTagSize(tag);
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Console.WriteLine("Tags found = " + count);
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for(uint i =0; i < count; i++)
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{
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string str;
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if(Tag.GetGType(tag) == GLib.GType.String) {
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if(!list.GetStringIndex(tag, i, out str))
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Console.Error.WriteLine("g_assert_not_reached()???");
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} else {
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str = (String) list.GetValueIndex(tag, i).Val;
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}
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if(i == 0)
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Console.WriteLine("{0}:\t {1}", Tag.GetNick(tag), str);
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else
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Console.WriteLine("\t{0}", str);
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}
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}
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static bool MessageLoop(Element element, ref TagList tags)
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{
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Bus bus = element.Bus;
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bool done = false;
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while(!done) {
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Message message = bus.Pop();
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if(message == null)
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break;
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switch(message.Type) {
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case MessageType.Error:
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string error;
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message.ParseError(out error);
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message.Dispose();
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return true;
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case MessageType.Eos:
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message.Dispose();
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return true;
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case MessageType.Tag: {
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TagList new_tags = new TagList();
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message.ParseTag(new_tags);
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if(tags != null) {
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tags = tags.Merge(new_tags, TagMergeMode.KeepAll);
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}
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else {
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tags = new_tags;
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}
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//tags.Foreach(PrintTag);
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//new_tags.Dispose();
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break;
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}
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default:
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break;
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}
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message.Dispose();
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}
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bus.Dispose();
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return true;
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}
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static void MakePipeline()
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{
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Element decodebin;
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if(pipeline != null) {
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pipeline.Dispose();
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}
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pipeline = new Pipeline(String.Empty);
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source = ElementFactory.Make("filesrc", "source");
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decodebin = ElementFactory.Make("decodebin", "decodebin");
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if(pipeline == null) Console.Error.WriteLine("Pipeline count not be created");
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if(source == null) Console.Error.WriteLine("Element filesrc could not be created");
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if(decodebin == null) Console.Error.WriteLine("Element decodebin coult not be created");
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Bin bin = (Bin) pipeline;
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bin.AddMany(source, decodebin);
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if(!source.Link(decodebin))
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Console.Error.WriteLine("filesrc could not be linked with decodebin");
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decodebin.Dispose();
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}
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public static void Main(string [] args)
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{
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Application.Init();
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if(args.Length < 1)
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{
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Console.Error.WriteLine("Please give filenames to read metadata from\n\n");
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return;
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}
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MakePipeline();
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int i=-1;
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while(++i < args.Length)
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{
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State state, pending;
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TagList tags = null;
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string filename = args[i];
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source.SetProperty("location", filename);
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StateChangeReturn sret = pipeline.SetState(State.Paused);
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if(sret == StateChangeReturn.Async) {
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if(StateChangeReturn.Success != pipeline.GetState(out state, out pending, Clock.Second * 5)) {
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Console.Error.WriteLine("State change failed for {0}. Aborting\n", filename);
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break;
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}
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} else if(sret != StateChangeReturn.Success) {
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Console.Error.WriteLine("{0} - Could not read file\n", filename);
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continue;
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}
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if(!MessageLoop(pipeline, ref tags)) {
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Console.Error.WriteLine("Failed in message reading for {0}", args[i]);
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}
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if(tags != null) {
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Console.WriteLine("Metadata for {0}:", args[i]);
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tags.Foreach(new TagForeachFunc(PrintTag));
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tags.Dispose();
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tags = null;
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} else Console.Error.WriteLine("No metadata found for {0}", args[0]);
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sret = pipeline.SetState(State.Null);
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if(StateChangeReturn.Async == sret) {
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if(StateChangeReturn.Failure == pipeline.GetState(out state, out pending, Clock.TimeNone)) {
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Console.Error.WriteLine("State change failed. Aborting");
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}
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}
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}
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if(pipeline != null)
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{
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pipeline.Dispose();
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}
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}
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}
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