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audio clip editor: primitive (left-focus) zoom

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This commit is contained in:
Paul Davis 2021-12-10 12:50:44 -07:00
parent 5b4dd8dcf4
commit e3cac796b3
2 changed files with 92 additions and 12 deletions
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84
gtk2_ardour/audio_clip_editor.cc
View file

@ -38,6 +38,7 @@
#include "ardour/source.h"
#include "widgets/ardour_button.h"
#include "widgets/ardour_icon.h"
#include "audio_clip_editor.h"
#include "audio_clock.h"
@ -53,13 +54,14 @@ using namespace Gtk;
using namespace ARDOUR;
using namespace ArdourCanvas;
using namespace ArdourWaveView;
using namespace ArdourWidgets;
using std::min;
using std::max;
/* ------------ */
AudioClipEditor::AudioClipEditor ()
: spp (0)
: _spp (0)
, _current_drag (0)
{
const double scale = UIConfiguration::instance().get_ui_scale();
@ -75,13 +77,10 @@ AudioClipEditor::AudioClipEditor ()
const double line_width = 3.;
start_line = new Line (line_container);
start_line->set (Duple (10, 0), Duple (10, 1));
start_line->set_outline_width (line_width * scale);
end_line = new Line (line_container);
end_line->set (Duple (30, 0), Duple (30, 1));
end_line->set_outline_width (line_width * scale);
loop_line = new Line (line_container);
loop_line->set (Duple (50, 0), Duple (50, 1));
loop_line->set_outline_width (line_width * scale);
start_line->Event.connect (sigc::bind (sigc::mem_fun (*this, &AudioClipEditor::line_event_handler), start_line));
@ -133,6 +132,33 @@ AudioClipEditor::line_event_handler (GdkEvent* ev, ArdourCanvas::Line* l)
return false;
}
void
AudioClipEditor::position_lines ()
{
if (!audio_region) {
return;
}
start_line->set_x0 (sample_to_pixel (audio_region->start().samples()));
start_line->set_x1 (sample_to_pixel (audio_region->start().samples()));
end_line->set_x0 (sample_to_pixel (audio_region->end().samples()));
end_line->set_x1 (sample_to_pixel (audio_region->end().samples()));
}
double
AudioClipEditor::sample_to_pixel (samplepos_t s)
{
return s / _spp;
}
samplepos_t
AudioClipEditor::pixel_to_sample (double p)
{
return p * _spp;
}
AudioClipEditor::LineDrag::LineDrag (AudioClipEditor& ed, ArdourCanvas::Line& l)
: editor (ed)
, line (l)
@ -189,6 +215,8 @@ AudioClipEditor::set_region (boost::shared_ptr<AudioRegion> r)
{
drop_waves ();
audio_region = r;
uint32_t n_chans = r->n_channels ();
samplecnt_t len;
@ -214,7 +242,7 @@ AudioClipEditor::set_region (boost::shared_ptr<AudioRegion> r)
waves.push_back (wv);
}
set_wave_spp (len);
set_spp_from_length (len);
set_wave_heights (frame->get().height() - 2.0);
set_waveform_colors ();
@ -229,6 +257,8 @@ AudioClipEditor::on_size_allocate (Gtk::Allocation& alloc)
ArdourCanvas::Rect r (1, 1, alloc.get_width() - 2, alloc.get_height() - 2);
frame->set (r);
position_lines ();
start_line->set_y1 (frame->get().height() - 2.);
end_line->set_y1 (frame->get().height() - 2.);
loop_line->set_y1 (frame->get().height() - 2.);
@ -237,16 +267,26 @@ AudioClipEditor::on_size_allocate (Gtk::Allocation& alloc)
}
void
AudioClipEditor::set_wave_spp (samplecnt_t len)
AudioClipEditor::set_spp (double samples_per_pixel)
{
double available_width = frame->get().width();
spp = floor (len / available_width);
_spp = samples_per_pixel;
position_lines ();
for (auto & wave : waves) {
wave->set_samples_per_pixel (spp);
wave->set_samples_per_pixel (_spp);
}
}
void
AudioClipEditor::set_spp_from_length (samplecnt_t len)
{
double available_width = frame->get().width();
double s = floor (len / available_width);
set_spp (s);
}
void
AudioClipEditor::set_wave_heights (int h)
{
@ -307,7 +347,18 @@ AudioClipEditorBox::AudioClipEditorBox ()
{
_header_label.set_text(_("AUDIO Region Trimmer:"));
_header_label.set_alignment(0.0, 0.5);
pack_start(_header_label, false, false, 6);
zoom_in_button.set_icon (ArdourIcon::ZoomIn);
zoom_out_button.set_icon (ArdourIcon::ZoomOut);
zoom_in_button.signal_clicked.connect (sigc::mem_fun (*this, &AudioClipEditorBox::zoom_in_click));
zoom_out_button.signal_clicked.connect (sigc::mem_fun (*this, &AudioClipEditorBox::zoom_out_click));
header_box.pack_start (_header_label, false, false);
header_box.pack_start (zoom_in_button, false, false);
header_box.pack_start (zoom_out_button, false, false);
pack_start(header_box, false, false, 6);
editor = manage (new AudioClipEditor);
editor->set_size_request(600,120);
@ -318,6 +369,19 @@ AudioClipEditorBox::AudioClipEditorBox ()
AudioClipEditorBox::~AudioClipEditorBox ()
{
delete editor;
}
void
AudioClipEditorBox::zoom_in_click ()
{
editor->set_spp (editor->spp() / 2.);
}
void
AudioClipEditorBox::zoom_out_click ()
{
editor->set_spp (editor->spp() * 2.);
}
void

20
gtk2_ardour/audio_clip_editor.h
View file

@ -32,6 +32,8 @@
#include "gtkmm2ext/cairo_packer.h"
#include "widgets/ardour_button.h"
#include "canvas/canvas.h"
#include "canvas/container.h"
#include "canvas/rectangle.h"
@ -71,6 +73,12 @@ class AudioClipEditor : public ArdourCanvas::GtkCanvas
void set_region (boost::shared_ptr<ARDOUR::AudioRegion>);
void on_size_allocate (Gtk::Allocation&);
double sample_to_pixel (ARDOUR::samplepos_t);
samplepos_t pixel_to_sample (double);
void set_spp (double);
double spp() const { return _spp; }
private:
ArdourCanvas::Rectangle* frame;
ArdourCanvas::Container* waves_container;
@ -79,7 +87,8 @@ class AudioClipEditor : public ArdourCanvas::GtkCanvas
ArdourCanvas::Line* end_line;
ArdourCanvas::Line* loop_line;
std::vector<ArdourWaveView::WaveView *> waves;
double spp;
double _spp;
boost::shared_ptr<ARDOUR::AudioRegion> audio_region;
enum LineType {
StartLine,
@ -91,9 +100,10 @@ class AudioClipEditor : public ArdourCanvas::GtkCanvas
bool line_event_handler (GdkEvent* ev, ArdourCanvas::Line*);
void drop_waves ();
void set_wave_heights (int);
void set_wave_spp (ARDOUR::samplecnt_t);
void set_spp_from_length (ARDOUR::samplecnt_t);
void set_waveform_colors ();
void set_colors ();
void position_lines ();
class LineDrag {
public:
@ -122,6 +132,9 @@ public:
void region_changed (const PBD::PropertyChange& what_changed);
private:
Gtk::HBox header_box;
ArdourWidgets::ArdourButton zoom_in_button;
ArdourWidgets::ArdourButton zoom_out_button;
Gtk::Label _header_label;
Gtk::Table table;
@ -130,6 +143,9 @@ private:
PBD::ScopedConnection state_connection;
boost::shared_ptr<ARDOUR::Region> _region;
void zoom_in_click ();
void zoom_out_click ();
};
#endif /* __audio_region_trimmer_box_h__ */