883 lines
21 KiB
C++
883 lines
21 KiB
C++
/*
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Copyright (C) 2011-2013 Paul Davis
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Author: Carl Hetherington <cth@carlh.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cmath>
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#include <cairomm/cairomm.h>
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#include "gtkmm2ext/utils.h"
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#include "pbd/compose.h"
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#include "pbd/signals.h"
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#include "pbd/stacktrace.h"
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#include "ardour/types.h"
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#include "ardour/dB.h"
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#include "ardour/audioregion.h"
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#include "canvas/wave_view.h"
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#include "canvas/utils.h"
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#include "canvas/canvas.h"
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#include <gdkmm/general.h>
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using namespace std;
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using namespace ARDOUR;
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using namespace ArdourCanvas;
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#define CACHE_HIGH_WATER (2)
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std::map <boost::shared_ptr<AudioSource>, std::vector<WaveView::CacheEntry> > WaveView::_image_cache;
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double WaveView::_global_gradient_depth = 0.6;
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bool WaveView::_global_logscaled = false;
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WaveView::Shape WaveView::_global_shape = WaveView::Normal;
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bool WaveView::_global_show_waveform_clipping = true;
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double WaveView::_clip_level = 0.98853;
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PBD::Signal0<void> WaveView::VisualPropertiesChanged;
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PBD::Signal0<void> WaveView::ClipLevelChanged;
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WaveView::WaveView (Canvas* c, boost::shared_ptr<ARDOUR::AudioRegion> region)
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: Item (c)
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, _region (region)
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, _channel (0)
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, _samples_per_pixel (0)
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, _height (64)
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, _show_zero (false)
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, _zero_color (0xff0000ff)
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, _clip_color (0xff0000ff)
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, _logscaled (_global_logscaled)
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, _shape (_global_shape)
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, _gradient_depth (_global_gradient_depth)
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, _shape_independent (false)
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, _logscaled_independent (false)
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, _gradient_depth_independent (false)
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, _amplitude_above_axis (1.0)
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, _region_amplitude (_region->scale_amplitude ())
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, _region_start (region->start())
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{
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VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
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ClipLevelChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_clip_level_change, this));
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}
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WaveView::WaveView (Group* g, boost::shared_ptr<ARDOUR::AudioRegion> region)
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: Item (g)
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, _region (region)
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, _channel (0)
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, _samples_per_pixel (0)
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, _height (64)
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, _show_zero (false)
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, _zero_color (0xff0000ff)
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, _clip_color (0xff0000ff)
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, _logscaled (_global_logscaled)
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, _shape (_global_shape)
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, _gradient_depth (_global_gradient_depth)
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, _shape_independent (false)
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, _logscaled_independent (false)
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, _gradient_depth_independent (false)
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, _amplitude_above_axis (1.0)
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, _region_amplitude (_region->scale_amplitude ())
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, _region_start (region->start())
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{
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VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
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ClipLevelChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_clip_level_change, this));
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}
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WaveView::~WaveView ()
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{
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invalidate_image_cache ();
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}
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void
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WaveView::handle_visual_property_change ()
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{
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bool changed = false;
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if (!_shape_independent && (_shape != global_shape())) {
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_shape = global_shape();
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changed = true;
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}
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if (!_logscaled_independent && (_logscaled != global_logscaled())) {
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_logscaled = global_logscaled();
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changed = true;
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}
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if (!_gradient_depth_independent && (_gradient_depth != global_gradient_depth())) {
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_gradient_depth = global_gradient_depth();
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changed = true;
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}
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if (changed) {
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begin_visual_change ();
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invalidate_image_cache ();
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end_visual_change ();
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}
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}
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void
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WaveView::handle_clip_level_change ()
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{
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begin_visual_change ();
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invalidate_image_cache ();
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end_visual_change ();
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}
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void
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WaveView::set_fill_color (Color c)
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{
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if (c != _fill_color) {
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begin_visual_change ();
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invalidate_image_cache ();
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Fill::set_fill_color (c);
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end_visual_change ();
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}
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}
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void
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WaveView::set_outline_color (Color c)
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{
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if (c != _outline_color) {
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begin_visual_change ();
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invalidate_image_cache ();
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Outline::set_outline_color (c);
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end_visual_change ();
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}
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}
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void
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WaveView::set_samples_per_pixel (double samples_per_pixel)
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{
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if (samples_per_pixel != _samples_per_pixel) {
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begin_change ();
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invalidate_image_cache ();
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_samples_per_pixel = samples_per_pixel;
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_bounding_box_dirty = true;
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end_change ();
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}
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}
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static inline double
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image_to_window (double wave_origin, double image_start)
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{
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return wave_origin + image_start;
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}
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static inline double
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window_to_image (double wave_origin, double image_start)
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{
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return image_start - wave_origin;
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}
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static inline float
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_log_meter (float power, double lower_db, double upper_db, double non_linearity)
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{
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return (power < lower_db ? 0.0 : pow((power-lower_db)/(upper_db-lower_db), non_linearity));
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}
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static inline float
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alt_log_meter (float power)
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{
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return _log_meter (power, -192.0, 0.0, 8.0);
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}
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void
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WaveView::set_clip_level (double dB)
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{
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const double clip_level = dB_to_coefficient (dB);
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if (clip_level != _clip_level) {
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_clip_level = clip_level;
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ClipLevelChanged ();
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}
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}
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void
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WaveView::invalidate_image_cache ()
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{
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vector <uint32_t> deletion_list;
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vector <CacheEntry> caches;
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if (_image_cache.find (_region->audio_source ()) != _image_cache.end ()) {
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caches = _image_cache.find (_region->audio_source ())->second;
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} else {
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return;
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}
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for (uint32_t i = 0; i < caches.size (); ++i) {
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if (_channel != caches[i].channel
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|| _height != caches[i].height
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|| _region_amplitude != caches[i].amplitude
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|| _fill_color != caches[i].fill_color
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|| _outline_color != caches[i].outline_color) {
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continue;
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}
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deletion_list.push_back (i);
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}
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while (deletion_list.size() > 0) {
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caches[deletion_list.back ()].image.clear ();
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caches.erase (caches.begin() + deletion_list.back());
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deletion_list.pop_back();
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}
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if (caches.size () == 0) {
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_image_cache.erase(_region->audio_source ());
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} else {
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_image_cache[_region->audio_source ()] = caches;
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}
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}
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void
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WaveView::consolidate_image_cache () const
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{
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list <uint32_t> deletion_list;
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vector <CacheEntry> caches;
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uint32_t other_entries = 0;
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if (_image_cache.find (_region->audio_source ()) != _image_cache.end ()) {
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caches = _image_cache.find (_region->audio_source ())->second;
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}
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for (uint32_t i = 0; i < caches.size (); ++i) {
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if (_channel != caches[i].channel
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|| _height != caches[i].height
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|| _region_amplitude != caches[i].amplitude
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|| _fill_color != caches[i].fill_color
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|| _outline_color != caches[i].outline_color) {
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other_entries++;
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continue;
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}
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framepos_t segment_start = caches[i].start;
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framepos_t segment_end = caches[i].end;
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for (uint32_t j = i; j < caches.size (); ++j) {
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if (i == j || _channel != caches[j].channel
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|| _height != caches[i].height
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|| _region_amplitude != caches[i].amplitude
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|| _fill_color != caches[i].fill_color
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|| _outline_color != caches[i].outline_color) {
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continue;
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}
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if (caches[j].start >= segment_start && caches[j].end <= segment_end) {
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deletion_list.push_back (j);
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}
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}
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}
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deletion_list.sort ();
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deletion_list.unique ();
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while (deletion_list.size() > 0) {
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caches[deletion_list.back ()].image.clear ();
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caches.erase (caches.begin() + deletion_list.back ());
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deletion_list.pop_back();
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}
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/* We don't care if this channel/height/amplitude has anything in the cache - just drop the Last Added entries
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until we reach a size where there is a maximum of CACHE_HIGH_WATER + other entries.
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*/
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while (caches.size() > CACHE_HIGH_WATER + other_entries) {
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caches.front ().image.clear ();
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caches.erase(caches.begin ());
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}
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if (caches.size () == 0) {
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_image_cache.erase (_region->audio_source ());
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} else {
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_image_cache[_region->audio_source ()] = caches;
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}
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}
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struct LineTips {
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double top;
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double bot;
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bool clip_max;
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bool clip_min;
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LineTips() : top (0.0), bot (0.0), clip_max (false), clip_min (false) {}
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};
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void
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WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peaks, int n_peaks) const
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{
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Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (image);
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boost::scoped_array<LineTips> tips (new LineTips[n_peaks]);
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/* Clip level nominally set to -0.9dBFS to account for inter-sample
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interpolation possibly clipping (value may be too low).
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We adjust by the region's own gain (but note: not by any gain
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automation or its gain envelope) so that clip indicators are closer
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to providing data about on-disk data. This multiplication is
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needed because the data we get from AudioRegion::read_peaks()
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has been scaled by scale_amplitude() already.
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*/
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const double clip_level = _clip_level * _region_amplitude;
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if (_shape == WaveView::Rectified) {
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/* each peak is a line from the bottom of the waveview
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* to a point determined by max (_peaks[i].max,
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* _peaks[i].min)
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*/
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if (_logscaled) {
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for (int i = 0; i < n_peaks; ++i) {
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tips[i].bot = height();
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tips[i].top = y_extent (alt_log_meter (fast_coefficient_to_dB (max (fabs (_peaks[i].max), fabs (_peaks[i].min)))));
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if (fabs (_peaks[i].max) >= clip_level) {
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tips[i].clip_max = true;
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}
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if (fabs (_peaks[i].min) >= clip_level) {
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tips[i].clip_min = true;
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}
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}
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} else {for (int i = 0; i < n_peaks; ++i) {
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tips[i].bot = height();
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tips[i].top = y_extent (max (fabs (_peaks[i].max), fabs (_peaks[i].min)));
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if (fabs (_peaks[i].max) >= clip_level) {
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tips[i].clip_max = true;
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}
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if (fabs (_peaks[i].min) >= clip_level) {
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tips[i].clip_min = true;
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}
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}
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}
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} else {
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if (_logscaled) {
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for (int i = 0; i < n_peaks; ++i) {
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Coord top = _peaks[i].min;
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Coord bot = _peaks[i].max;
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if (fabs (top) >= clip_level) {
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tips[i].clip_max = true;
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}
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if (fabs (bot) >= clip_level) {
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tips[i].clip_min = true;
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}
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if (top > 0.0) {
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top = y_extent (alt_log_meter (fast_coefficient_to_dB (top)));
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} else if (top < 0.0) {
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top = y_extent (-alt_log_meter (fast_coefficient_to_dB (-top)));
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} else {
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top = y_extent (0.0);
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}
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if (bot > 0.0) {
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bot = y_extent (alt_log_meter (fast_coefficient_to_dB (bot)));
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} else if (bot < 0.0) {
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bot = y_extent (-alt_log_meter (fast_coefficient_to_dB (-bot)));
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} else {
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bot = y_extent (0.0);
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}
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tips[i].top = top;
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tips[i].bot = bot;
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}
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} else {
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for (int i = 0; i < n_peaks; ++i) {
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if (fabs (_peaks[i].max) >= clip_level) {
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tips[i].clip_max = true;
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}
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if (fabs (_peaks[i].min) >= clip_level) {
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tips[i].clip_min = true;
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}
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tips[i].top = y_extent (_peaks[i].min);
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tips[i].bot = y_extent (_peaks[i].max);
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}
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}
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}
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if (gradient_depth() != 0.0) {
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Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _height));
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double stops[3];
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double r, g, b, a;
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if (_shape == Rectified) {
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stops[0] = 0.1;
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stops[0] = 0.3;
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stops[0] = 0.9;
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} else {
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stops[0] = 0.1;
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stops[1] = 0.5;
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stops[2] = 0.9;
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}
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color_to_rgba (_fill_color, r, g, b, a);
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gradient->add_color_stop_rgba (stops[0], r, g, b, a);
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gradient->add_color_stop_rgba (stops[2], r, g, b, a);
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/* generate a new color for the middle of the gradient */
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double h, s, v;
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color_to_hsv (_fill_color, h, s, v);
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/* change v towards white */
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v *= 1.0 - gradient_depth();
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Color center = hsv_to_color (h, s, v, a);
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color_to_rgba (center, r, g, b, a);
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gradient->add_color_stop_rgba (stops[1], r, g, b, a);
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context->set_source (gradient);
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} else {
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set_source_rgba (context, _fill_color);
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}
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/* ensure single-pixel lines */
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context->set_line_width (0.5);
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context->translate (0.5, 0.0);
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/* draw the lines */
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if (_shape == WaveView::Rectified) {
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for (int i = 0; i < n_peaks; ++i) {
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context->move_to (i, tips[i].top); /* down 1 pixel */
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context->line_to (i, tips[i].bot);
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}
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} else {
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for (int i = 0; i < n_peaks; ++i) {
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context->move_to (i, tips[i].top);
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context->line_to (i, tips[i].bot);
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}
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}
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context->stroke ();
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/* now add dots to the top and bottom of each line (this is
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* modelled on pyramix, except that we add clipping indicators.
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*
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* the height of the clip-indicator should be at most 7 pixels,
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* or 5% of the height of the waveview item.
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*/
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const double clip_height = min (7.0, ceil (_height * 0.05));
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set_source_rgba (context, _outline_color);
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for (int i = 0; i < n_peaks; ++i) {
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context->move_to (i, tips[i].top);
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bool show_top_clip = _global_show_waveform_clipping &&
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((_shape == WaveView::Rectified && (tips[i].clip_max || tips[i].clip_min)) ||
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tips[i].clip_max);
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if (show_top_clip) {
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/* clip-indicating upper terminal line */
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set_source_rgba (context, _clip_color);
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context->rel_line_to (0, clip_height);
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context->stroke ();
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set_source_rgba (context, _outline_color);
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} else {
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/* normal upper terminal dot */
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context->rel_line_to (0, 1.0);
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context->stroke ();
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}
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if (_global_show_waveform_clipping && _shape != WaveView::Rectified) {
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context->move_to (i, tips[i].bot);
|
|
if (tips[i].clip_min) {
|
|
/* clip-indicating lower terminal line */
|
|
set_source_rgba (context, _clip_color);
|
|
context->rel_line_to (0, -clip_height);
|
|
context->stroke ();
|
|
set_source_rgba (context, _outline_color);
|
|
} else {
|
|
/* normal lower terminal dot */
|
|
context->rel_line_to (0, -1.0);
|
|
context->stroke ();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (show_zero_line()) {
|
|
set_source_rgba (context, _zero_color);
|
|
context->set_line_width (1.0);
|
|
context->move_to (0, y_extent (0.0) + 0.5);
|
|
context->line_to (n_peaks, y_extent (0.0) + 0.5);
|
|
context->stroke ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::get_image (Cairo::RefPtr<Cairo::ImageSurface>& image, framepos_t start, framepos_t end, double& image_offset) const
|
|
{
|
|
vector <CacheEntry> caches;
|
|
|
|
if (_image_cache.find (_region->audio_source ()) != _image_cache.end ()) {
|
|
|
|
caches = _image_cache.find (_region->audio_source ())->second;
|
|
}
|
|
|
|
/* Find a suitable ImageSurface.
|
|
*/
|
|
for (uint32_t i = 0; i < caches.size (); ++i) {
|
|
|
|
if (_channel != caches[i].channel
|
|
|| _height != caches[i].height
|
|
|| _region_amplitude != caches[i].amplitude
|
|
|| _fill_color != caches[i].fill_color
|
|
|| _outline_color != caches[i].outline_color) {
|
|
|
|
continue;
|
|
}
|
|
|
|
framepos_t segment_start = caches[i].start;
|
|
framepos_t segment_end = caches[i].end;
|
|
|
|
if (end <= segment_end && start >= segment_start) {
|
|
image_offset = (segment_start - _region->start()) / _samples_per_pixel;
|
|
image = caches[i].image;
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
consolidate_image_cache ();
|
|
|
|
/* sample position is canonical here, and we want to generate
|
|
* an image that spans about twice the canvas width
|
|
*/
|
|
|
|
const framepos_t center = start + ((end - start) / 2);
|
|
const framecnt_t canvas_samples = _canvas->visible_area().width() * _samples_per_pixel; /* one canvas width */
|
|
|
|
/* we can request data from anywhere in the Source, between 0 and its length
|
|
*/
|
|
|
|
framepos_t sample_start = max ((framepos_t) 0, (center - canvas_samples));
|
|
framepos_t sample_end = min (center + canvas_samples, _region->source_length (0));
|
|
|
|
const int n_peaks = llrintf ((sample_end - sample_start)/ (double) _samples_per_pixel);
|
|
|
|
boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
|
|
|
|
_region->read_peaks (peaks.get(), n_peaks,
|
|
sample_start, sample_end - sample_start,
|
|
_channel,
|
|
_samples_per_pixel);
|
|
|
|
image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, ((double)(sample_end - sample_start)) / _samples_per_pixel, _height);
|
|
|
|
draw_image (image, peaks.get(), n_peaks);
|
|
|
|
_image_cache[_region->audio_source ()].push_back (CacheEntry (_channel, _height, _region_amplitude, _fill_color, _outline_color, sample_start, sample_end, image));
|
|
|
|
image_offset = (sample_start - _region->start()) / _samples_per_pixel;
|
|
|
|
//cerr << "_image_cache size is : " << _image_cache.size() << " entries for this audiosource : " << _image_cache.find (_region->audio_source ())->second.size() << endl;
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
|
|
{
|
|
assert (_samples_per_pixel != 0);
|
|
|
|
if (!_region) {
|
|
return;
|
|
}
|
|
|
|
Rect self = item_to_window (Rect (0.5, 0.0, _region->length() / _samples_per_pixel, _height));
|
|
boost::optional<Rect> d = self.intersection (area);
|
|
|
|
if (!d) {
|
|
return;
|
|
}
|
|
|
|
Rect draw = d.get();
|
|
|
|
/* window coordinates - pixels where x=0 is the left edge of the canvas
|
|
* window. We round down in case we were asked to
|
|
* draw "between" pixels at the start and/or end.
|
|
*/
|
|
|
|
const double draw_start = floor (draw.x0);
|
|
const double draw_end = floor (draw.x1);
|
|
|
|
// cerr << "Need to draw " << draw_start << " .. " << draw_end << endl;
|
|
|
|
/* image coordnates: pixels where x=0 is the start of this waveview,
|
|
* wherever it may be positioned. thus image_start=N means "an image
|
|
* that beings N pixels after the start of region that this waveview is
|
|
* representing.
|
|
*/
|
|
|
|
const framepos_t image_start = window_to_image (self.x0, draw_start);
|
|
const framepos_t image_end = window_to_image (self.x0, draw_end);
|
|
|
|
// cerr << "Image/WV space: " << image_start << " .. " << image_end << endl;
|
|
|
|
/* sample coordinates - note, these are not subject to rounding error */
|
|
framepos_t sample_start = _region_start + (image_start * _samples_per_pixel);
|
|
framepos_t sample_end = _region_start + (image_end * _samples_per_pixel);
|
|
|
|
// cerr << "Sample space: " << sample_start << " .. " << sample_end << endl;
|
|
|
|
Cairo::RefPtr<Cairo::ImageSurface> image;
|
|
double image_offset = 0;
|
|
|
|
get_image (image, sample_start, sample_end, image_offset);
|
|
|
|
// cerr << "Offset into image to place at zero: " << image_offset << endl;
|
|
|
|
context->rectangle (draw_start, draw.y0, draw_end - draw_start, draw.height());
|
|
|
|
/* round image origin position to an exact pixel in device space to
|
|
* avoid blurring
|
|
*/
|
|
|
|
double x = self.x0 + image_offset;
|
|
double y = self.y0;
|
|
context->user_to_device (x, y);
|
|
x = round (x);
|
|
y = round (y);
|
|
context->device_to_user (x, y);
|
|
|
|
context->set_source (image, x, y);
|
|
context->fill ();
|
|
}
|
|
|
|
void
|
|
WaveView::compute_bounding_box () const
|
|
{
|
|
if (_region) {
|
|
_bounding_box = Rect (0.0, 0.0, _region->length() / _samples_per_pixel, _height);
|
|
} else {
|
|
_bounding_box = boost::optional<Rect> ();
|
|
}
|
|
|
|
_bounding_box_dirty = false;
|
|
}
|
|
|
|
void
|
|
WaveView::set_height (Distance height)
|
|
{
|
|
if (height != _height) {
|
|
begin_change ();
|
|
|
|
invalidate_image_cache ();
|
|
_height = height;
|
|
|
|
_bounding_box_dirty = true;
|
|
end_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_channel (int channel)
|
|
{
|
|
if (channel != _channel) {
|
|
begin_change ();
|
|
|
|
invalidate_image_cache ();
|
|
_channel = channel;
|
|
|
|
_bounding_box_dirty = true;
|
|
end_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_logscaled (bool yn)
|
|
{
|
|
if (_logscaled != yn) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_logscaled = yn;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::gain_changed ()
|
|
{
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_region_amplitude = _region->scale_amplitude ();
|
|
end_visual_change ();
|
|
}
|
|
|
|
void
|
|
WaveView::set_zero_color (Color c)
|
|
{
|
|
if (_zero_color != c) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_zero_color = c;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_clip_color (Color c)
|
|
{
|
|
if (_clip_color != c) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_clip_color = c;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_show_zero_line (bool yn)
|
|
{
|
|
if (_show_zero != yn) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_show_zero = yn;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_shape (Shape s)
|
|
{
|
|
if (_shape != s) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_shape = s;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_amplitude_above_axis (double a)
|
|
{
|
|
if (_amplitude_above_axis != a) {
|
|
begin_visual_change ();
|
|
invalidate_image_cache ();
|
|
_amplitude_above_axis = a;
|
|
end_visual_change ();
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_global_shape (Shape s)
|
|
{
|
|
if (_global_shape != s) {
|
|
_global_shape = s;
|
|
VisualPropertiesChanged (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_global_logscaled (bool yn)
|
|
{
|
|
if (_global_logscaled != yn) {
|
|
_global_logscaled = yn;
|
|
VisualPropertiesChanged (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::region_resized ()
|
|
{
|
|
if (!_region) {
|
|
return;
|
|
}
|
|
|
|
/* special: do not use _region->length() here to compute
|
|
bounding box because it will already have changed.
|
|
|
|
if we have a bounding box, use it.
|
|
*/
|
|
|
|
_pre_change_bounding_box = _bounding_box;
|
|
|
|
_bounding_box_dirty = true;
|
|
compute_bounding_box ();
|
|
|
|
end_change ();
|
|
}
|
|
|
|
Coord
|
|
WaveView::y_extent (double s) const
|
|
{
|
|
/* it is important that this returns an integral value, so that we
|
|
can ensure correct single pixel behaviour.
|
|
*/
|
|
|
|
Coord pos;
|
|
|
|
switch (_shape) {
|
|
case Rectified:
|
|
pos = floor (_height - (s * _height));
|
|
break;
|
|
default:
|
|
pos = floor ((1.0-s) * (_height / 2.0));
|
|
break;
|
|
}
|
|
|
|
return min (_height, (max (0.0, pos)));
|
|
}
|
|
|
|
void
|
|
WaveView::set_global_gradient_depth (double depth)
|
|
{
|
|
if (_global_gradient_depth != depth) {
|
|
_global_gradient_depth = depth;
|
|
VisualPropertiesChanged (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|
|
void
|
|
WaveView::set_global_show_waveform_clipping (bool yn)
|
|
{
|
|
if (_global_show_waveform_clipping != yn) {
|
|
_global_show_waveform_clipping = yn;
|
|
VisualPropertiesChanged (); /* EMIT SIGNAL */
|
|
}
|
|
}
|
|
|