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/*
* subtitleeditor -- a tool to create or edit subtitle
*
* https://kitone.github.io/subtitleeditor/
* https://github.com/kitone/subtitleeditor/
*
* Copyright @ 2005-2009, kitone
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gstreamermm.h>
#include <gtkmm.h>
#include <iostream>
#include <iomanip>
#include <keyframes.h>
#include <utility.h>
#include "mediadecoder.h"
/*
*/
class KeyframesGenerator : public Gtk::Dialog, public MediaDecoder
{
public:
/*
*/
KeyframesGenerator(const Glib::ustring &uri, Glib::RefPtr<KeyFrames> &keyframes)
:Gtk::Dialog(_("Generate Keyframes"), true), MediaDecoder(1000)
{
set_border_width(12);
set_default_size(300, -1);
get_vbox()->pack_start(m_progressbar, false, false);
add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
m_progressbar.set_text(_("Waiting..."));
show_all();
try
{
create_pipeline(uri);
if(run() == Gtk::RESPONSE_OK)
{
keyframes = Glib::RefPtr<KeyFrames>(new KeyFrames);
keyframes->insert(keyframes->end(), m_values.begin(), m_values.end());
keyframes->set_video_uri(uri);
}
}
catch(const std::runtime_error &ex)
{
std::cerr << ex.what() << std::endl;
}
}
/*
* Check buffer and try to catch keyframes.
*/
void on_video_identity_handoff(const Glib::RefPtr<Gst::Buffer>& buf, const Glib::RefPtr<Gst::Pad>&)
{
// FIXME: http://bugzilla.gnome.org/show_bug.cgi?id=590923
//if(!buf->flag_is_set(GST_BUFFER_FLAG_DELTA_UNIT))//Gst::BUFFER_FLAG_DELTA_UNIT))
if(!GST_BUFFER_FLAG_IS_SET(buf->gobj(), GST_BUFFER_FLAG_DELTA_UNIT))
{
// FIXME: gstreamer 1.0
//long pos = buf->get_timestamp() / GST_MSECOND;
long pos = buf->get_pts() / GST_MSECOND;
m_values.push_back(pos);
}
}
/*
* Create video bin
*/
Glib::RefPtr<Gst::Element> create_element(const Glib::ustring &structure_name)
{
try
{
// We only need and want create the video sink
if(structure_name.find("video") == Glib::ustring::npos)
return Glib::RefPtr<Gst::Element>(NULL);
Glib::RefPtr<Gst::FakeSink> fakesink = Gst::FakeSink::create("fakesink");
fakesink->set_sync(false);
fakesink->property_silent() = true;
fakesink->property_signal_handoffs() = true;
fakesink->signal_handoff().connect(
sigc::mem_fun(*this, &KeyframesGenerator::on_video_identity_handoff));
// Set the new sink tp READY as well
Gst::StateChangeReturn retst = fakesink->set_state(Gst::STATE_READY);
if( retst == Gst::STATE_CHANGE_FAILURE )
std::cerr << "Could not change state of new sink: " << retst << std::endl;
return fakesink;
}
catch(std::runtime_error &ex)
{
std::cerr << "create_element runtime_error: " << ex.what() << std::endl;
}
return Glib::RefPtr<Gst::Element>(NULL);
}
/*
* Update the progress bar
*/
bool on_timeout()
{
if(!m_pipeline)
return false;
Gst::Format fmt = Gst::FORMAT_TIME;
gint64 pos = 0, len = 0;
if(m_pipeline->query_position(fmt, pos) && m_pipeline->query_duration(fmt, len))
{
double percent = (double)pos / (double)len;
percent = CLAMP(percent, 0.0, 1.0);
m_progressbar.set_fraction(percent);
m_progressbar.set_text(time_to_string(pos) + " / " + time_to_string(len));
m_duration = len;
return pos != len;
}
else
m_progressbar.set_text(_("Waiting..."));
return true;
}
/*
*/
void on_work_finished()
{
response(Gtk::RESPONSE_OK);
}
/*
*/
void on_work_cancel()
{
response(Gtk::RESPONSE_CANCEL);
}
protected:
Gtk::ProgressBar m_progressbar;
std::list<long> m_values;
guint64 m_duration;
};
/*
*/
Glib::RefPtr<KeyFrames> generate_keyframes_from_file(const Glib::ustring &uri)
{
Glib::RefPtr<KeyFrames> kf;
KeyframesGenerator ui(uri, kf);
return kf;
}
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