tape_region_view.cc

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/*
    Copyright (C) 2006 Paul Davis

    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <cmath>
#include <algorithm>

#include <gtkmm.h>

#include <gtkmm2ext/gtk_ui.h>

#include "ardour/audioregion.h"
#include "ardour/audiosource.h"

#include "tape_region_view.h"
#include "audio_time_axis.h"
#include "gui_thread.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Editing;
using namespace ArdourCanvas;

const TimeAxisViewItem::Visibility TapeAudioRegionView::default_tape_visibility
        = TimeAxisViewItem::Visibility (
                TimeAxisViewItem::ShowNameHighlight |
                TimeAxisViewItem::ShowNameText |
                TimeAxisViewItem::ShowFrame |
                TimeAxisViewItem::HideFrameRight |
                TimeAxisViewItem::FullWidthNameHighlight);

TapeAudioRegionView::TapeAudioRegionView (ArdourCanvas::Container *parent, RouteTimeAxisView &tv,
                                          boost::shared_ptr<AudioRegion> r,
                                          double spu,
                                          uint32_t basic_color)

        : AudioRegionView (parent, tv, r, spu, basic_color, false,
                           TimeAxisViewItem::Visibility ((r->position() != 0) ? default_tape_visibility :
                                                         TimeAxisViewItem::Visibility (default_tape_visibility|TimeAxisViewItem::HideFrameLeft)))
{
}

void
TapeAudioRegionView::init (bool /*wfw*/)
{
        /* never wait for data: always just create the waves, connect once and then
           we'll update whenever we need to.
        */

        AudioRegionView::init (false);

        /* every time the wave data changes and peaks are ready, redraw */

        for (uint32_t n = 0; n < audio_region()->n_channels(); ++n) {
                audio_region()->audio_source(n)->PeaksReady.connect (*this, invalidator (*this), boost::bind (&TapeAudioRegionView::update, this, n), gui_context());
        }

}

TapeAudioRegionView::~TapeAudioRegionView()
{
}

void
TapeAudioRegionView::update (uint32_t /*n*/)
{
        /* check that all waves are build and ready */
        if (!tmp_waves.empty()) {
                return;
        }

        ENSURE_GUI_THREAD (*this, &TapeAudioRegionView::update, n);
        // CAIROCANVAS

        /* this is a quick hack to draw something (abuse gain_changed to force
         * an image-cache invalidation.
         *
         * TODO: ArdourCanvas::WaveView needs an API to look up the specific channel "n"
         * and a special case to not only invalidate the cache but re-expose the
         * waveform. e.g.
         *
         * waves[m]->rebuild();  // where 'm' corresponds to channel 'n'.
         */
        for (uint32_t i = 0; i < waves.size(); ++i) {
                waves[i]->gain_changed ();
        }
}