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/*
* Copyright (C) 2012 Intel Corporation.
*
* Author: Jens Georg <jensg@openismus.com>
*
* This file is part of Rygel.
*
* Rygel is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Rygel is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
using Gst;
public class Rygel.GstDataSource : Rygel.DataSource, GLib.Object {
private dynamic Element src;
private Pipeline pipeline;
private HTTPSeek seek = null;
private GstSink sink;
private uint bus_watch_id;
public GstDataSource (string uri) {
this.src = GstUtils.create_source_for_uri (uri);
}
~GstDataSource () {
this.sink.cancellable.cancel ();
this.pipeline.set_state (State.NULL);
}
public GstDataSource.from_element (Element element) {
this.src = element;
}
public void start (HTTPSeek? offsets) throws Error {
this.seek = offsets;
this.prepare_pipeline ("RygelGstDataSource", this.src);
if (this.seek != null) {
this.pipeline.set_state (State.PAUSED);
} else {
this.pipeline.set_state (State.PLAYING);
}
}
public void freeze () {
this.sink.freeze ();
}
public void thaw () {
this.sink.thaw ();
}
public void stop () {
// Unlock eventually frozen sink
this.sink.cancellable.cancel ();
this.pipeline.set_state (State.NULL);
Source.remove (this.bus_watch_id);
Idle.add ( () => { this.done (); return false; });
}
private void prepare_pipeline (string name,
Element src) throws Error {
this.sink = new GstSink (this, this.seek);
this.pipeline = new Pipeline (name);
if (pipeline == null) {
throw new DataSourceError.GENERAL
(_("Failed to create pipeline"));
}
this.pipeline.add_many (src, sink);
if (src.numsrcpads == 0) {
// Seems source uses dynamic pads, link when pad available
src.pad_added.connect (this.src_pad_added);
} else {
// static pads? easy!
if (!src.link (sink)) {
throw new GstError.LINK (_("Failed to link %s to %s"),
src.name,
sink.name);
}
}
// Bus handler
var bus = this.pipeline.get_bus ();
this.bus_watch_id = bus.add_watch (this.bus_handler);
}
private void src_pad_added (Element src, Pad src_pad) {
var caps = src_pad.get_caps_reffed ();
var sink = this.pipeline.get_by_name (GstSink.NAME);
Pad sink_pad;
dynamic Element depay = GstUtils.get_rtp_depayloader (caps);
if (depay != null) {
this.pipeline.add (depay);
if (!depay.link (sink)) {
critical (_("Failed to link %s to %s"),
depay.name,
sink.name);
this.done ();
return;
}
sink_pad = depay.get_compatible_pad (src_pad, caps);
} else {
sink_pad = sink.get_compatible_pad (src_pad, caps);
}
if (src_pad.link (sink_pad) != PadLinkReturn.OK) {
critical (_("Failed to link pad %s to %s"),
src_pad.name,
sink_pad.name);
this.done ();
return;
}
if (depay != null) {
depay.sync_state_with_parent ();
}
}
private bool bus_handler (Gst.Bus bus, Gst.Message message) {
bool ret = true;
if (message.type == MessageType.EOS) {
ret = false;
} else if (message.type == MessageType.STATE_CHANGED) {
if (message.src != this.pipeline) {
return true;
}
State old_state;
State new_state;
message.parse_state_changed (out old_state,
out new_state,
null);
if (old_state == State.NULL && new_state == State.READY) {
dynamic Element element = this.pipeline.get_by_name ("muxer");
if (element != null) {
var name = element.get_factory ().get_name ();
// Awesome gross hack, really.
if (name == "mp4mux") {
element.streamable = true;
element.fragment_duration = 1000;
}
}
}
if (this.seek != null) {
if (old_state == State.READY && new_state == State.PAUSED) {
if (this.perform_seek ()) {
this.pipeline.set_state (State.PLAYING);
}
}
}
} else {
GLib.Error err;
string err_msg;
if (message.type == MessageType.ERROR) {
message.parse_error (out err, out err_msg);
critical (_("Error from pipeline %s: %s"),
this.pipeline.name,
err_msg);
ret = false;
} else if (message.type == MessageType.WARNING) {
message.parse_warning (out err, out err_msg);
warning (_("Warning from pipeline %s: %s"),
this.pipeline.name,
err_msg);
}
}
if (!ret) {
Idle.add_full (Priority.DEFAULT, () => {
this.done ();
return false;
});
}
return ret;
}
private bool perform_seek () {
var stop_type = Gst.SeekType.NONE;
Format format;
var flags = SeekFlags.FLUSH;
if (this.seek is HTTPTimeSeek) {
format = Format.TIME;
flags |= SeekFlags.KEY_UNIT;
} else {
format = Format.BYTES;
flags |= SeekFlags.ACCURATE;
}
if (this.seek.stop > 0) {
stop_type = Gst.SeekType.SET;
}
if (!this.pipeline.seek (1.0,
format,
flags,
Gst.SeekType.SET,
this.seek.start,
stop_type,
this.seek.stop + 1)) {
warning (_("Failed to seek to offsets %lld:%lld"),
this.seek.start,
this.seek.stop);
this.error (new DataSourceError.SEEK_FAILED (_("Failed to seek")));
return false;
}
return true;
}
}
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