Add method to plot loudness analysis graph
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babf319cea
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A090BCE02CF57F04
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@ -499,3 +499,399 @@ ArdourGraphs::time_axis (Glib::RefPtr<Pango::Context> pctx, int width, int m_l,
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ytme->flush ();
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return ytme;
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}
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Cairo::RefPtr<Cairo::ImageSurface>
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ArdourGraphs::plot_loudness (Glib::RefPtr<Pango::Context> pctx, ExportAnalysisPtr p, int height, int margin_left, samplecnt_t sample_rate)
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{
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int w, h, anw;
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Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (pctx);
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layout->set_font_description (UIConfiguration::instance ().get_SmallMonospaceFont ());
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layout->set_text ("-888");
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layout->get_pixel_size (anw, h);
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layout->set_text ("00:00:00.0");
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layout->get_pixel_size (w, h);
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const size_t width = sizeof (p->lgraph_i) / sizeof (float); // 800
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const int n_labels = width / (w * 1.75);
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if (height < 0) {
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height = width / 3;
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}
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int m_top = h;
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int m_right = h;
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int m_bottom = h * 1.75;
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layout->set_text ("-89");
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layout->get_pixel_size (w, h);
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int m_left = w * 1.75;
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bool render_for_export = false;
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if (margin_left > 0) {
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m_left = margin_left - 1;
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m_right = 0;
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m_top = 0;
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m_bottom = 0;
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render_for_export = true;
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} else {
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margin_left = m_left;
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}
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float x0 = m_left + .5;
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float y0 = m_top + .5;
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Cairo::RefPtr<Cairo::ImageSurface> ls = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, width + margin_left + m_right, height + m_top + m_bottom);
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Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create (ls);
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/* background */
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cr->set_source_rgb (0, 0, 0);
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cr->paint ();
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if (render_for_export) {
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cr->set_operator (Cairo::OPERATOR_SOURCE);
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cr->rectangle (0, 0, margin_left - 1, height + m_top);
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cr->set_source_rgba (0, 0, 0, 0);
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cr->fill ();
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cr->set_operator (Cairo::OPERATOR_OVER);
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} else {
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/* border (left, bottom) */
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cr->set_source_rgba (.7, .7, .7, 1.0);
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cr->set_line_width (1.0);
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cr->move_to (x0, y0 + height);
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cr->line_to (x0 + width, y0 + height);
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cr->stroke ();
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cr->move_to (x0, y0);
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cr->line_to (x0, y0 + height);
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cr->stroke ();
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}
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/* determine y-axis range */
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bool have_data = false;
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float v_max = -10;
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float v_min = -40;
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/* determine y-axis range */
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for (size_t x = 0; x < width; ++x) {
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if (p->lgraph_i[x] > -110) {
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v_max = std::max (v_max, p->lgraph_i[x]);
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v_min = std::min (v_min, p->lgraph_i[x]);
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have_data = true;
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}
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if (p->lgraph_s[x] > -110) {
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v_max = std::max (v_max, p->lgraph_s[x]);
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v_min = std::min (v_min, p->lgraph_s[x]);
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have_data = true;
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}
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if (p->lgraph_m[x] > -110) {
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v_max = std::max (v_max, p->lgraph_m[x]);
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v_min = std::min (v_min, p->lgraph_m[x]);
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have_data = true;
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}
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}
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if (render_for_export) {
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v_max = ceilf ((v_max - 5.f) / 10.f) * 10.f + 5.f;
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v_min = floorf ((v_min + 5.f) / 10.f) * 10.f - 5.f;
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} else {
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v_max = ceilf (v_max / 10.f) * 10.f;
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v_min = floorf ((v_min + 5.f) / 10.f) * 10.f - 5.f;
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}
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v_min = std::max (-95.f, v_min);
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std::vector<double> dashes;
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dashes.push_back (3.0);
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dashes.push_back (5.0);
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cr->set_line_cap (Cairo::LINE_CAP_ROUND);
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/* time axis labels */
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cr->set_line_width (1.0);
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for (int i = 0; i <= n_labels; ++i) {
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const float fract = (float)i / n_labels;
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const float xalign = (i == n_labels) ? 1 : (i == 0) ? 0 : 0.5;
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if (!render_for_export) {
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char buf[16];
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AudioClock::print_minsec (p->n_samples * fract, buf, sizeof (buf), sample_rate, 1);
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layout->set_text (&buf[1]);
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layout->get_pixel_size (w, h);
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cr->move_to (rint (m_left + width * fract - w * xalign), height + m_top + m_bottom - h - 1);
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cr->set_source_rgba (.9, .9, .9, 1.0);
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layout->show_in_cairo_context (cr);
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cr->set_source_rgba (.7, .7, .7, 1.0);
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cr->move_to (rint (m_left + width * fract) + .5, m_top + height + .5);
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cr->line_to (rint (m_left + width * fract) + .5, floor (height + m_top * 1.5) + .5);
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cr->stroke ();
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} else {
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cr->set_source_rgba (.7, .7, .7, 1.0);
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}
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if (i == 0 && !render_for_export) {
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continue;
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}
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cr->move_to (rint (m_left + width * fract) + .5, m_top + .5);
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cr->line_to (rint (m_left + width * fract) + .5, m_top + height + .5);
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cr->set_source_rgba (.5, .5, .5, 1.0);
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cr->set_dash (dashes, 2.0);
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cr->stroke ();
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cr->unset_dash ();
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}
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#define YPOS(val) (height * std::min (1.f, std::max<float> (0.f, (v_max - (val)) / (v_max - v_min))))
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layout->set_font_description (UIConfiguration::instance ().get_SmallerFont ());
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layout->set_text (_("LUFS"));
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layout->get_pixel_size (w, h);
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if (render_for_export) {
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cr->move_to (rint (margin_left - h - anw - 10), rint ((height + w) * .5));
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} else {
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cr->move_to (m_left - h - 5, m_top + height + rint ((m_bottom + w) * .5) - 3);
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}
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cr->save ();
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cr->set_source_rgba (.9, .9, .9, 1.0);
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cr->rotate (M_PI / -2.f);
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layout->show_in_cairo_context (cr);
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cr->restore ();
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layout->set_font_description (UIConfiguration::instance ().get_SmallMonospaceFont ());
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for (float v = v_min + 5; v <= v_max; v += 10.f) {
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char buf[16];
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snprintf (buf, sizeof (buf), "%.0f", v);
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float y = YPOS (v);
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cr->save ();
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layout->set_text (buf);
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layout->get_pixel_size (w, h);
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cr->move_to (m_left - h - 5, m_top + rint (y + w * .5));
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cr->set_source_rgba (.9, .9, .9, 1.0);
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cr->rotate (M_PI / -2.f);
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layout->show_in_cairo_context (cr);
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cr->restore ();
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y = y0 + rintf (y);
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cr->set_source_rgba (.7, .7, .7, 1.0);
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cr->move_to (m_left - 3.5, y);
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cr->line_to (m_left + 0.5, y);
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cr->stroke ();
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cr->set_source_rgba (.5, .5, .5, 1.0);
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cr->move_to (m_left, y);
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cr->line_to (m_left + width, y);
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cr->set_dash (dashes, 2.0);
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cr->stroke ();
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cr->unset_dash ();
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}
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if (!have_data) {
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layout->set_font_description (UIConfiguration::instance ().get_HugerItalicFont ());
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layout->set_text ("Silence");
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layout->get_pixel_size (w, h);
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cr->set_source_rgba (.7, .7, .7, 0.7);
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cr->move_to (m_left + rint ((width - w) * .5), m_top + rint ((height - h) * .5));
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layout->show_in_cairo_context (cr);
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ls->flush ();
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return ls;
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}
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cr->rectangle (m_left, m_top, width, height);
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cr->clip ();
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/* plot data */
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bool first = true;
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int skip = 0;
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float yp;
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/* values */
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cr->set_line_width (3);
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dashes.clear ();
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dashes.push_back (6.0);
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dashes.push_back (6.0);
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if (p->max_loudness_momentary >= v_min) {
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cr->set_dash (dashes, 2.0);
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cr->set_source_rgba (.1, .4, 1, 0.4);
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float y = y0 + YPOS (p->max_loudness_momentary);
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cr->move_to (x0, y);
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cr->line_to (x0 + width, y);
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cr->stroke ();
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}
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if (p->max_loudness_short >= v_min) {
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cr->set_dash (dashes, 8.0);
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cr->set_source_rgba (1, .2, .1, 0.25);
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float y = y0 + YPOS (p->max_loudness_short);
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cr->move_to (x0, y);
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cr->line_to (x0 + width, y);
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cr->stroke ();
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}
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cr->set_line_width (6);
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cr->unset_dash ();
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if (p->integrated_loudness >= v_min) {
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cr->set_source_rgba (.3, 1, .3, 0.3);
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float y = y0 + YPOS (p->integrated_loudness);
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cr->move_to (x0, y);
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cr->line_to (x0 + width, y);
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cr->stroke ();
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}
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/* integrated */
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cr->set_source_rgba (.1, 1, .1, 1.0);
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cr->set_line_width (1.5);
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for (size_t x = 0; x < width; ++x) {
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if (p->lgraph_i[x] < v_min && first) {
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continue;
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}
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float y = y0 + YPOS (p->lgraph_i[x]);
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if (first) {
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cr->move_to (x0 + x, y);
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yp = y;
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first = false;
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} else if ((x == width - 1) || fabsf (yp - y) > 0.5) {
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if (skip > 9 && fabsf (yp - y) > 9) {
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cr->line_to (x0 + x - 1, yp);
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}
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yp = y;
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cr->line_to (x0 + x, y);
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skip = 0;
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} else {
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++skip;
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}
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}
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cr->stroke ();
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/* short */
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cr->set_source_rgba (1, .2, .1, 1.0);
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cr->set_line_width (1.0);
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first = true;
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skip = 0;
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for (size_t x = 0; x < width; ++x) {
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if (p->lgraph_s[x] <= v_min && first) {
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continue;
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}
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float y = y0 + YPOS (p->lgraph_s[x]);
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if (first) {
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yp = y;
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cr->move_to (x0 + x, y);
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first = false;
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} else if ((x == width - 1) || fabsf (yp - y) > 0.5) {
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if (skip > 5 && fabsf (yp - y) > 5) {
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cr->line_to (x0 + x - 1, yp);
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}
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yp = y;
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cr->line_to (x0 + x, y);
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skip = 0;
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} else {
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++skip;
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}
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}
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cr->stroke ();
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/* momentary */
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cr->set_source_rgba (.1, .4, 1, 1.0);
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first = true;
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skip = 0;
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for (size_t x = 0; x < width; ++x) {
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if (p->lgraph_m[x] <= v_min && first) {
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continue;
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}
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float y = y0 + YPOS (p->lgraph_m[x]);
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if (first) {
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cr->move_to (x0 + x, y);
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yp = y;
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first = false;
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} else if ((x == width - 1) || fabsf (yp - y) > 0.5) {
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if (skip > 5 && fabsf (yp - y) > 5) {
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cr->line_to (x0 + x - 1, yp);
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}
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yp = y;
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cr->line_to (x0 + x, y);
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skip = 0;
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} else {
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++skip;
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}
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}
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cr->stroke ();
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/* legend */
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float xl = m_left + 10;
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float yl = height + m_top - 8;
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int lw = 0;
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int lh = 0;
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layout->set_text ("Integrated");
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layout->get_pixel_size (w, h);
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lw = w;
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lh = h;
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layout->set_text ("Short");
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layout->get_pixel_size (w, h);
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lw = std::max (lw, w);
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lh = std::max (lh, h);
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layout->set_text ("Momentary");
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layout->get_pixel_size (w, h);
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lw = std::max (lw, w);
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h = std::max (lh, h);
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lh = ceil (3.6 * h);
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Gtkmm2ext::rounded_rectangle (cr, xl - 4, yl - lh, lw + 20, lh, 5);
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cr->set_source_rgba (.3, .3, .3, .75);
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cr->fill ();
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yl -= h * .7;
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cr->set_line_width (2);
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float yy = rint (yl);
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cr->move_to (xl + 0.5, yy);
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cr->line_to (xl + 7.5, yy);
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cr->set_source_rgba (.1, .4, 1, 1.0);
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cr->stroke ();
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cr->move_to (xl + 11, rint (yl - h * .5));
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cr->set_source_rgba (.9, .9, .9, 1.0);
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layout->show_in_cairo_context (cr);
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yl -= h * 1.1;
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layout->set_text ("Short");
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layout->get_pixel_size (w, h);
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yy = rint (yl);
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cr->move_to (xl + 0.5, yy);
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cr->line_to (xl + 7.5, yy);
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cr->set_source_rgba (1, .2, .1, 1.0);
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cr->stroke ();
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cr->move_to (xl + 11, rint (yl - h * .5));
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cr->set_source_rgba (.9, .9, .9, 1.0);
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layout->show_in_cairo_context (cr);
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yl -= h * 1.1;
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layout->set_text ("Integrated");
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layout->get_pixel_size (w, h);
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yy = rint (yl);
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cr->move_to (xl + 0.5, yy);
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cr->line_to (xl + 7.5, yy);
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cr->set_source_rgba (.1, 1, .1, 1.0);
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cr->stroke ();
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cr->move_to (xl + 11, rint (yl - h * .5));
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cr->set_source_rgba (.9, .9, .9, 1.0);
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layout->show_in_cairo_context (cr);
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ls->flush ();
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return ls;
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}
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@ -39,4 +39,7 @@ loudness_histogram (Glib::RefPtr<Pango::Context>, ARDOUR::ExportAnalysisPtr, int
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Cairo::RefPtr<Cairo::ImageSurface>
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time_axis (Glib::RefPtr<Pango::Context>, int width, int margin_left, ARDOUR::samplepos_t start, ARDOUR::samplecnt_t len, ARDOUR::samplecnt_t rate);
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Cairo::RefPtr<Cairo::ImageSurface>
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plot_loudness (Glib::RefPtr<Pango::Context>, ARDOUR::ExportAnalysisPtr, int height, int margin_left, ARDOUR::samplecnt_t rate);
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}; // namespace ArdourGraphs
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