#include <cmath>
#include <cairomm/cairomm.h>
-#include <boost/scoped_array.hpp>
-
#include "gtkmm2ext/utils.h"
#include "pbd/compose.h"
, _gradient_depth_independent (false)
, _amplitude_above_axis (1.0)
, _region_start (region->start())
- , _cache (0)
+ , _sample_start (-1)
+ , _sample_end (-1)
{
VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
}
WaveView::~WaveView ()
{
- delete _cache;
- _cache = 0;
}
void
}
if (changed) {
- invalidate_image_cache ();
+ invalidate_image ();
}
}
WaveView::set_fill_color (Color c)
{
if (c != _fill_color) {
- invalidate_image_cache ();
+ invalidate_image ();
Fill::set_fill_color (c);
}
}
WaveView::set_outline_color (Color c)
{
if (c != _outline_color) {
- invalidate_image_cache ();
+ invalidate_image ();
Outline::set_outline_color (c);
}
}
end_change ();
- invalidate_whole_cache ();
+ invalidate_image ();
}
}
return image_start - wave_origin;
}
+static inline float
+_log_meter (float power, double lower_db, double upper_db, double non_linearity)
+{
+ return (power < lower_db ? 0.0 : pow((power-lower_db)/(upper_db-lower_db), non_linearity));
+}
+
+static inline float
+alt_log_meter (float power)
+{
+ return _log_meter (power, -192.0, 0.0, 8.0);
+}
+
+struct LineTips {
+ double top;
+ double bot;
+ bool clipped;
+
+ LineTips() : top (0.0), bot (0.0), clipped (false) {}
+};
+
void
-WaveView::ensure_cache (framecnt_t start, framecnt_t end,
- framepos_t sample_start, framepos_t sample_end) const
+WaveView::draw_image (PeakData* _peaks, int n_peaks) const
{
- if (_cache && _cache->sample_start() <= sample_start && _cache->sample_end() >= sample_end) {
- /* cache already covers required range, do nothing */
- return;
+ _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
+
+ Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
+
+ boost::scoped_array<LineTips> tips (new LineTips[n_peaks]);
+
+ if (_shape == WaveView::Rectified) {
+
+ /* each peak is a line from the bottom of the waveview
+ * to a point determined by max (_peaks[i].max,
+ * _peaks[i].min)
+ */
+
+ if (_logscaled) {
+ for (int i = 0; i < n_peaks; ++i) {
+ tips[i].bot = height();
+ tips[i].top = position (alt_log_meter (fast_coefficient_to_dB (max (fabs (_peaks[i].max), fabs (_peaks[i].min)))));
+ }
+ } else {for (int i = 0; i < n_peaks; ++i) {
+ tips[i].bot = height();
+ tips[i].top = position (max (fabs (_peaks[i].max), fabs (_peaks[i].min)));
+ }
+ }
+
+ } else {
+
+ if (_logscaled) {
+ for (int i = 0; i < n_peaks; ++i) {
+ Coord top = _peaks[i].min;
+ Coord bot = _peaks[i].max;
+
+ if (top > 0.0) {
+ top = position (alt_log_meter (fast_coefficient_to_dB (top)));
+ } else if (top < 0.0) {
+ top = position (-alt_log_meter (fast_coefficient_to_dB (-top)));
+ } else {
+ top = position (0.0);
+ }
+
+ if (bot > 0.0) {
+ bot = position (alt_log_meter (fast_coefficient_to_dB (bot)));
+ } else if (bot < 0.0) {
+ bot = position (-alt_log_meter (fast_coefficient_to_dB (-bot)));
+ } else {
+ bot = position (0.0);
+ }
+
+ tips[i].top = top;
+ tips[i].bot = bot;
+
+ }
+
+ } else {
+ for (int i = 0; i < n_peaks; ++i) {
+ tips[i].top = position (_peaks[i].min);
+ tips[i].bot = position (_peaks[i].max);
+ }
+ }
+ }
+
+ if (gradient_depth() != 0.0) {
+
+ Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _height));
+
+ double stops[3];
+
+ double r, g, b, a;
+
+ if (_shape == Rectified) {
+ stops[0] = 0.1;
+ stops[0] = 0.3;
+ stops[0] = 0.9;
+ } else {
+ stops[0] = 0.1;
+ stops[1] = 0.5;
+ stops[2] = 0.9;
+ }
+
+ color_to_rgba (_fill_color, r, g, b, a);
+ gradient->add_color_stop_rgba (stops[0], r, g, b, a);
+ gradient->add_color_stop_rgba (stops[2], r, g, b, a);
+
+ /* generate a new color for the middle of the gradient */
+ double h, s, v;
+ color_to_hsv (_fill_color, h, s, v);
+ /* change v towards white */
+ v *= 1.0 - gradient_depth();
+ Color center = hsv_to_color (h, s, v, a);
+ color_to_rgba (center, r, g, b, a);
+ gradient->add_color_stop_rgba (stops[1], r, g, b, a);
+
+ context->set_source (gradient);
+ } else {
+ set_source_rgba (context, _fill_color);
+ }
+
+ /* ensure single-pixel lines */
+
+ context->set_line_width (0.5);
+ context->translate (0.5, 0.0);
+
+ /* draw the lines */
+
+ if (_shape == WaveView::Rectified) {
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top); /* down 1 pixel */
+ context->line_to (i, tips[i].bot);
+ context->stroke ();
+ }
+ } else {
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top);
+ context->line_to (i, tips[i].bot);
+ context->stroke ();
+ }
}
- if (_cache) {
- delete _cache;
- _cache = 0;
+ /* now add dots to the top and bottom of each line (this is
+ * modelled on pyramix, except that we add clipping indicators.
+ */
+
+ context->set_source_rgba (0, 0, 0, 1.0);
+
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top);
+ context->rel_line_to (0, 1.0);
+ context->stroke ();
+ if (_shape != WaveView::Rectified) {
+ context->move_to (i, tips[i].bot);
+ context->rel_line_to (0, -1.0);
+ context->stroke ();
+ }
+ }
+
+ if (show_zero_line()) {
+ set_source_rgba (context, _zero_color);
+ context->move_to (0, position (0.0));
+ context->line_to (n_peaks, position (0.0));
+ context->stroke ();
+ }
+}
+
+void
+WaveView::ensure_cache (framepos_t start, framepos_t end) const
+{
+ if (_image && _sample_start <= start && _sample_end >= end) {
+ /* cache already covers required range, do nothing */
+ return;
}
/* sample position is canonical here, and we want to generate
* an image that spans about twice the canvas width
*/
- const framepos_t center = sample_start + ((sample_end - sample_start) / 2);
+ const framepos_t center = start + ((end - start) / 2);
const framecnt_t canvas_samples = 2 * (_canvas->visible_area().width() * _samples_per_pixel);
/* we can request data from anywhere in the Source, between 0 and its length
*/
- sample_start = max ((framepos_t) 0, (center - canvas_samples));
- sample_end = min (center + canvas_samples, _region->source_length (0));
-
-#if 0
- if (sample_end <= sample_start) {
- cerr << "sample start = " << sample_start << endl;
- cerr << "center+ = " << center<< endl;
- cerr << "CS = " << canvas_samples << endl;
- cerr << "pui = " << center + canvas_samples << endl;
- cerr << "sl = " << _region->source_length (0) << endl;
- cerr << "st = " << _region->start () << endl;
- cerr << "END: " << sample_end << endl;
- assert (false);
- }
-#endif
-
- start = floor (sample_start / (double) _samples_per_pixel);
- end = ceil (sample_end / (double) _samples_per_pixel);
-
- assert (end > start);
+ _sample_start = max ((framepos_t) 0, (center - canvas_samples));
+ _sample_end = min (center + canvas_samples, _region->source_length (0));
- // cerr << name << " cache miss - new CE, span " << start << " .. " << end << " (" << sample_start << " .. " << sample_end << ")\n";
+ double pixel_start = floor (_sample_start / (double) _samples_per_pixel);
+ double pixel_end = ceil (_sample_end / (double) _samples_per_pixel);
+ int n_peaks = llrintf (pixel_end - pixel_start);
- _cache = new CacheEntry (this, start, end, sample_start, sample_end);
+ 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);
+
+ draw_image (peaks.get(), n_peaks);
}
void
// cerr << "Sample space: " << sample_start << " .. " << sample_end << endl;
- ensure_cache (image_start, image_end, sample_start, sample_end);
+ ensure_cache (sample_start, sample_end);
// cerr << "Cache contains " << _cache->pixel_start() << " .. " << _cache->pixel_end() << " / "
// << _cache->sample_start() << " .. " << _cache->sample_end()
// << endl;
- double image_offset = (_cache->sample_start() - _region->start()) / _samples_per_pixel;
+ double image_offset = (_sample_start - _region->start()) / _samples_per_pixel;
// cerr << "Offset into image to place at zero: " << image_offset << endl;
y = round (y);
context->device_to_user (x, y);
- context->set_source (_cache->image(), x, y);
+ context->set_source (_image, x, y);
context->fill ();
}
_bounding_box_dirty = true;
end_change ();
- invalidate_image_cache ();
+ invalidate_image ();
}
}
_bounding_box_dirty = true;
end_change ();
- invalidate_whole_cache ();
+ invalidate_image ();
}
}
void
-WaveView::invalidate_whole_cache ()
+WaveView::invalidate_image ()
{
begin_visual_change ();
- delete _cache;
- _cache = 0;
+
+ _image.clear ();
+ _sample_start = -1;
+ _sample_end = -1;
+
end_visual_change ();
}
-void
-WaveView::invalidate_image_cache ()
-{
- invalidate_whole_cache ();
-}
void
WaveView::set_logscaled (bool yn)
{
if (_logscaled != yn) {
_logscaled = yn;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
void
WaveView::gain_changed ()
{
- invalidate_whole_cache ();
+ invalidate_image ();
}
void
{
if (_zero_color != c) {
_zero_color = c;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_clip_color != c) {
_clip_color = c;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_show_zero != yn) {
_show_zero = yn;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_shape != s) {
_shape = s;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_amplitude_above_axis != a) {
_amplitude_above_axis = a;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
end_change ();
}
-WaveView::CacheEntry::CacheEntry (WaveView const * wave_view, double pixel_start, double pixel_end,
- framepos_t sample_start,framepos_t sample_end)
- : _wave_view (wave_view)
- , _pixel_start (pixel_start)
- , _pixel_end (pixel_end)
- , _sample_start (sample_start)
- , _sample_end (sample_end)
- , _n_peaks (_pixel_end - _pixel_start)
-{
- _peaks.reset (new PeakData[_n_peaks]);
-
- _wave_view->_region->read_peaks (_peaks.get(), _n_peaks,
- _sample_start, _sample_end - _sample_start,
- _wave_view->_channel,
- _wave_view->_samples_per_pixel);
-}
-
-WaveView::CacheEntry::~CacheEntry ()
-{
-}
-
-static inline float
-_log_meter (float power, double lower_db, double upper_db, double non_linearity)
-{
- return (power < lower_db ? 0.0 : pow((power-lower_db)/(upper_db-lower_db), non_linearity));
-}
-
-static inline float
-alt_log_meter (float power)
-{
- return _log_meter (power, -192.0, 0.0, 8.0);
-}
-
-struct LineTips {
- double top;
- double bot;
- bool clipped;
-
- LineTips() : top (0.0), bot (0.0), clipped (false) {}
-};
-
-Cairo::RefPtr<Cairo::ImageSurface>
-WaveView::CacheEntry::image ()
-{
- if (!_image) {
-
- _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _n_peaks, _wave_view->_height);
- Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
-
-#ifdef AREA_DRAW_AND_FILL
-
- /* Draw the edge of the waveform, top half first, the loop back
- * for the bottom half to create a clockwise path
- */
-
- context->begin_new_path();
-
- if (_wave_view->_shape == WaveView::Rectified) {
-
- /* top edge of waveform is based on max (fabs (peak_min, peak_max))
- */
-
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (alt_log_meter (fast_coefficient_to_dB (
- max (fabs (_peaks[i].max), fabs (_peaks[i].min))))));
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (max (fabs (_peaks[i].max), fabs (_peaks[i].min))));
- }
- }
-
- } else {
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- Coord y = _peaks[i].max;
-
- if (y > 0.0) {
- y = position (alt_log_meter (fast_coefficient_to_dB (y)));
- } else if (y < 0.0) {
- y = position (-alt_log_meter (fast_coefficient_to_dB (-y)));
- } else {
- y = position (0.0);
- }
- context->line_to (i + 0.5, y);
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (_peaks[i].max));
- }
- }
- }
-
- /* from final top point, move out of the clip zone */
-
- context->line_to (_n_peaks + 10, position (0.0));
-
- /* bottom half, in reverse */
-
- if (_wave_view->_shape == WaveView::Rectified) {
-
- /* lower half: drop to the bottom, then a line back to
- * beyond the left edge of the clip region
- */
-
- context->line_to (_n_peaks + 10, _wave_view->_height);
- context->line_to (-10.0, _wave_view->_height);
-
- } else {
-
- if (_wave_view->_logscaled) {
- for (int i = _n_peaks-1; i >= 0; --i) {
- Coord y = _peaks[i].min;
- if (y > 0.0) {
- context->line_to (i + 0.5, position (alt_log_meter (fast_coefficient_to_dB (y))));
- } else if (y < 0.0) {
- context->line_to (i + 0.5, position (-alt_log_meter (fast_coefficient_to_dB (-y))));
- } else {
- context->line_to (i + 0.5, position (0.0));
- }
- }
- } else {
- for (int i = _n_peaks-1; i >= 0; --i) {
- context->line_to (i + 0.5, position (_peaks[i].min));
- }
- }
-
- /* from final bottom point, move out of the clip zone */
-
- context->line_to (-10.0, position (0.0));
- }
-
- context->close_path ();
-
- if (_wave_view->gradient_depth() != 0.0) {
-
- Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _wave_view->_height));
-
- double stops[3];
-
- double r, g, b, a;
-
- if (_wave_view->_shape == Rectified) {
- stops[0] = 0.1;
- stops[0] = 0.3;
- stops[0] = 0.9;
- } else {
- stops[0] = 0.1;
- stops[1] = 0.5;
- stops[2] = 0.9;
- }
-
- color_to_rgba (_wave_view->_fill_color, r, g, b, a);
- gradient->add_color_stop_rgba (stops[0], r, g, b, a);
- gradient->add_color_stop_rgba (stops[2], r, g, b, a);
-
- /* generate a new color for the middle of the gradient */
- double h, s, v;
- color_to_hsv (_wave_view->_fill_color, h, s, v);
- /* tone down the saturation */
- s *= 1.0 - _wave_view->gradient_depth();
- Color center = hsv_to_color (h, s, v, a);
- color_to_rgba (center, r, g, b, a);
- gradient->add_color_stop_rgba (stops[1], r, g, b, a);
-
- context->set_source (gradient);
- } else {
- set_source_rgba (context, _wave_view->_fill_color);
- }
-
- context->fill_preserve ();
- _wave_view->setup_outline_context (context);
- context->stroke ();
-
-#else
- boost::scoped_array<LineTips> tips (new LineTips[_n_peaks]);
-
- if (_wave_view->_shape == WaveView::Rectified) {
-
- /* each peak is a line from the bottom of the waveview
- * to a point determined by max (_peaks[i].max,
- * _peaks[i].min)
- */
-
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- tips[i].bot = _wave_view->height();
- tips[i].top = position (alt_log_meter (fast_coefficient_to_dB (max (fabs (_peaks[i].max), fabs (_peaks[i].min)))));
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- tips[i].bot = _wave_view->height();
- tips[i].top = position (max (fabs (_peaks[i].max), fabs (_peaks[i].min)));
- }
- }
-
- } else {
-
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- Coord top = _peaks[i].min;
- Coord bot = _peaks[i].max;
-
- if (top > 0.0) {
- top = position (alt_log_meter (fast_coefficient_to_dB (top)));
- } else if (top < 0.0) {
- top = position (-alt_log_meter (fast_coefficient_to_dB (-top)));
- } else {
- top = position (0.0);
- }
-
- if (bot > 0.0) {
- bot = position (alt_log_meter (fast_coefficient_to_dB (bot)));
- } else if (bot < 0.0) {
- bot = position (-alt_log_meter (fast_coefficient_to_dB (-bot)));
- } else {
- bot = position (0.0);
- }
-
- tips[i].top = top;
- tips[i].bot = bot;
-
- }
-
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- tips[i].top = position (_peaks[i].min);
- tips[i].bot = position (_peaks[i].max);
- }
- }
- }
-
- if (_wave_view->gradient_depth() != 0.0) {
-
- Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _wave_view->_height));
-
- double stops[3];
-
- double r, g, b, a;
-
- if (_wave_view->_shape == Rectified) {
- stops[0] = 0.1;
- stops[0] = 0.3;
- stops[0] = 0.9;
- } else {
- stops[0] = 0.1;
- stops[1] = 0.5;
- stops[2] = 0.9;
- }
-
- color_to_rgba (_wave_view->_fill_color, r, g, b, a);
- gradient->add_color_stop_rgba (stops[0], r, g, b, a);
- gradient->add_color_stop_rgba (stops[2], r, g, b, a);
-
- /* generate a new color for the middle of the gradient */
- double h, s, v;
- color_to_hsv (_wave_view->_fill_color, h, s, v);
- /* change v towards white */
- v *= 1.0 - _wave_view->gradient_depth();
- Color center = hsv_to_color (h, s, v, a);
- color_to_rgba (center, r, g, b, a);
- gradient->add_color_stop_rgba (stops[1], r, g, b, a);
-
- context->set_source (gradient);
- } else {
- set_source_rgba (context, _wave_view->_fill_color);
- }
-
- /* ensure single-pixel lines */
-
- context->set_line_width (0.5);
- context->translate (0.5, 0.0);
-
- /* draw the lines */
-
- if (_wave_view->_shape == WaveView::Rectified) {
- for (int i = 0; i < _n_peaks; ++i) {
- context->move_to (i, tips[i].top); /* down 1 pixel */
- context->line_to (i, tips[i].bot);
- context->stroke ();
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- context->move_to (i, tips[i].top);
- context->line_to (i, tips[i].bot);
- context->stroke ();
- }
- }
-
- /* now add dots to the top and bottom of each line (this is
- * modelled on pyramix, except that we add clipping indicators.
- */
-
- context->set_source_rgba (0, 0, 0, 1.0);
-
- for (int i = 0; i < _n_peaks; ++i) {
- context->move_to (i, tips[i].top);
- context->rel_line_to (0, 1.0);
- context->stroke ();
- if (_wave_view->_shape != WaveView::Rectified) {
- context->move_to (i, tips[i].bot);
- context->rel_line_to (0, -1.0);
- context->stroke ();
- }
- }
-#endif
-
- if (_wave_view->show_zero_line()) {
- set_source_rgba (context, _wave_view->_zero_color);
- context->move_to (0, position (0.0));
- context->line_to (_n_peaks, position (0.0));
- context->stroke ();
- }
-
- }
-
- return _image;
-}
-
-
Coord
-WaveView::CacheEntry::position (double s) const
+WaveView::position (double s) const
{
/* it is important that this returns an integral value, so that we
can ensure correct single pixel behaviour.
*/
- switch (_wave_view->_shape) {
+ switch (_shape) {
case Rectified:
- return floor (_wave_view->_height - (s * _wave_view->_height));
+ return floor (_height - (s * _height));
default:
break;
}
- return floor ((1.0-s) * (_wave_view->_height / 2.0));
+ return floor ((1.0-s) * (_height / 2.0));
}
-void
-WaveView::CacheEntry::clear_image ()
-{
- _image.clear ();
-}
-
void
WaveView::set_global_gradient_depth (double depth)
{
projects / ardour.git / commitdiff