#include "canvas/wave_view.h"
#include "canvas/utils.h"
#include "canvas/canvas.h"
+#include "canvas/colors.h"
#include <gdkmm/general.h>
using namespace ARDOUR;
using namespace ArdourCanvas;
+#define CACHE_HIGH_WATER (2)
+
+std::map <boost::shared_ptr<AudioSource>, std::vector<WaveView::CacheEntry> > WaveView::_image_cache;
double WaveView::_global_gradient_depth = 0.6;
bool WaveView::_global_logscaled = false;
WaveView::Shape WaveView::_global_shape = WaveView::Normal;
PBD::Signal0<void> WaveView::VisualPropertiesChanged;
PBD::Signal0<void> WaveView::ClipLevelChanged;
-WaveView::WaveView (Group* parent, boost::shared_ptr<ARDOUR::AudioRegion> region)
+WaveView::WaveView (Canvas* c, boost::shared_ptr<ARDOUR::AudioRegion> region)
+ : Item (c)
+ , _region (region)
+ , _channel (0)
+ , _samples_per_pixel (0)
+ , _height (64)
+ , _show_zero (false)
+ , _zero_color (0xff0000ff)
+ , _clip_color (0xff0000ff)
+ , _logscaled (_global_logscaled)
+ , _shape (_global_shape)
+ , _gradient_depth (_global_gradient_depth)
+ , _shape_independent (false)
+ , _logscaled_independent (false)
+ , _gradient_depth_independent (false)
+ , _amplitude_above_axis (1.0)
+ , _region_amplitude (_region->scale_amplitude ())
+ , _start_shift (0.0)
+ , _region_start (region->start())
+{
+ VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
+ ClipLevelChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_clip_level_change, this));
+}
+
+WaveView::WaveView (Item* parent, boost::shared_ptr<ARDOUR::AudioRegion> region)
: Item (parent)
- , Outline (parent)
- , Fill (parent)
, _region (region)
, _channel (0)
, _samples_per_pixel (0)
, _height (64)
- , _wave_color (0xffffffff)
, _show_zero (false)
, _zero_color (0xff0000ff)
, _clip_color (0xff0000ff)
, _logscaled_independent (false)
, _gradient_depth_independent (false)
, _amplitude_above_axis (1.0)
+ , _region_amplitude (_region->scale_amplitude ())
, _region_start (region->start())
- , _sample_start (-1)
- , _sample_end (-1)
{
VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
+ ClipLevelChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_clip_level_change, this));
}
WaveView::~WaveView ()
{
+ invalidate_image_cache ();
}
void
_gradient_depth = global_gradient_depth();
changed = true;
}
-
+
if (changed) {
- invalidate_image ();
+ begin_visual_change ();
+ invalidate_image_cache ();
+ end_visual_change ();
}
}
+void
+WaveView::handle_clip_level_change ()
+{
+ begin_visual_change ();
+ invalidate_image_cache ();
+ end_visual_change ();
+}
+
void
WaveView::set_fill_color (Color c)
{
if (c != _fill_color) {
- invalidate_image ();
+ begin_visual_change ();
+ invalidate_image_cache ();
Fill::set_fill_color (c);
+ end_visual_change ();
}
}
WaveView::set_outline_color (Color c)
{
if (c != _outline_color) {
- invalidate_image ();
+ begin_visual_change ();
+ invalidate_image_cache ();
Outline::set_outline_color (c);
+ end_visual_change ();
}
}
if (samples_per_pixel != _samples_per_pixel) {
begin_change ();
+ invalidate_image_cache ();
_samples_per_pixel = samples_per_pixel;
-
_bounding_box_dirty = true;
-
+
end_change ();
-
- invalidate_image ();
}
}
-static inline double
-image_to_window (double wave_origin, double image_start)
-{
- return wave_origin + image_start;
-}
-
static inline double
window_to_image (double wave_origin, double image_start)
{
void
WaveView::set_clip_level (double dB)
{
- _clip_level = dB_to_coefficient (dB);
- ClipLevelChanged ();
+ const double clip_level = dB_to_coefficient (dB);
+ if (clip_level != _clip_level) {
+ _clip_level = clip_level;
+ ClipLevelChanged ();
+ }
+}
+
+void
+WaveView::invalidate_image_cache ()
+{
+ vector <uint32_t> deletion_list;
+ vector <CacheEntry> caches;
+
+ /* The source may have disappeared in the case of rec regions.*/
+ if (_region->n_channels() == 0) {
+ std::map <boost::shared_ptr<ARDOUR::AudioSource>, std::vector <CacheEntry> >::iterator i;
+ for (i = _image_cache.begin(); i != _image_cache.end(); ++i) {
+ if (i->first.unique()) {
+ for (uint32_t n = 0; n < (*i).second.size (); ++n) {
+ (*i).second[n].image.clear ();
+ }
+ (*i).second.clear ();
+ _image_cache.erase(i->first);
+ }
+ }
+ return;
+ }
+
+ if (_image_cache.find (_region->audio_source ()) != _image_cache.end ()) {
+ caches = _image_cache.find (_region->audio_source ())->second;
+ } else {
+ return;
+ }
+
+ 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) {
+
+ continue;
+ }
+
+ deletion_list.push_back (i);
+ }
+
+ while (deletion_list.size() > 0) {
+ caches[deletion_list.back ()].image.clear ();
+ caches.erase (caches.begin() + deletion_list.back());
+ deletion_list.pop_back();
+ }
+
+ if (caches.size () == 0) {
+ _image_cache.erase(_region->audio_source ());
+ } else {
+ _image_cache[_region->audio_source ()] = caches;
+ }
+}
+
+void
+WaveView::consolidate_image_cache () const
+{
+ list <uint32_t> deletion_list;
+ vector <CacheEntry> caches;
+ uint32_t other_entries = 0;
+
+ if (_image_cache.find (_region->audio_source ()) != _image_cache.end ()) {
+ caches = _image_cache.find (_region->audio_source ())->second;
+ }
+
+ 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) {
+
+ other_entries++;
+ continue;
+ }
+
+ framepos_t segment_start = caches[i].start;
+ framepos_t segment_end = caches[i].end;
+
+ for (uint32_t j = i; j < caches.size (); ++j) {
+
+ if (i == j || _channel != caches[j].channel
+ || _height != caches[i].height
+ || _region_amplitude != caches[i].amplitude
+ || _fill_color != caches[i].fill_color) {
+
+ continue;
+ }
+
+ if (caches[j].start >= segment_start && caches[j].end <= segment_end) {
+
+ deletion_list.push_back (j);
+ }
+ }
+ }
+
+ deletion_list.sort ();
+ deletion_list.unique ();
+
+ while (deletion_list.size() > 0) {
+ caches[deletion_list.back ()].image.clear ();
+ caches.erase (caches.begin() + deletion_list.back ());
+ deletion_list.pop_back();
+ }
+
+ /* We don't care if this channel/height/amplitude has anything in the cache - just drop the Last Added entries
+ until we reach a size where there is a maximum of CACHE_HIGH_WATER + other entries.
+ */
+
+ while (caches.size() > CACHE_HIGH_WATER + other_entries) {
+ caches.front ().image.clear ();
+ caches.erase(caches.begin ());
+ }
+
+ if (caches.size () == 0) {
+ _image_cache.erase (_region->audio_source ());
+ } else {
+ _image_cache[_region->audio_source ()] = caches;
+ }
+}
+
+Coord
+WaveView::y_extent (double s, bool /*round_to_lower_edge*/) const
+{
+ /* it is important that this returns an integral value, so that we
+ * can ensure correct single pixel behaviour.
+ *
+ * we need (_height - max(wave_line_width))
+ * wave_line_width == 1 IFF top==bottom (1 sample per pixel or flat line)
+ * wave_line_width == 2 otherwise
+ * then round away from the zero line, towards peak
+ */
+ if (_shape == Rectified) {
+ // we only ever have 1 point and align to the bottom (not center)
+ return floor ((1.0 - s) * (_height - 2.0));
+ } else {
+ /* currently canvas rectangle is off-by-one and we
+ * cannot draw a pixel at 0 (-.5 .. +.5) without it being
+ * clipped. A value 1.0 (ideally one point at y=0) ends
+ * up a pixel down. and a value of -1.0 (ideally y = _height-1)
+ * currently is on the bottom separator line :(
+ * So to make the complete waveform appear centered in
+ * a region, we translate by +.5 (instead of -.5)
+ * and waste two pixel of height: -4 (instad of -2)
+ *
+ * This needs fixing in canvas/rectangle the intersect
+ * functions and probably a couple of other places as well...
+ */
+ Coord pos;
+ if (s < 0) {
+ pos = ceil ((1.0 - s) * .5 * (_height - 4.0));
+ } else {
+ pos = floor ((1.0 - s) * .5 * (_height - 4.0));
+ }
+ return min (_height - 4.0, (max (0.0, pos)));
+ }
+}
+
+void
+WaveView::draw_absent_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peaks, int n_peaks) const
+{
+ Cairo::RefPtr<Cairo::ImageSurface> stripe = Cairo::ImageSurface::create (Cairo::FORMAT_A8, n_peaks, _height);
+
+ Cairo::RefPtr<Cairo::Context> stripe_context = Cairo::Context::create (stripe);
+ stripe_context->set_antialias (Cairo::ANTIALIAS_NONE);
+
+ uint32_t stripe_separation = 150;
+ double start = - floor (_height / stripe_separation) * stripe_separation;
+ int stripe_x = 0;
+
+ while (start < n_peaks) {
+
+ stripe_context->move_to (start, 0);
+ stripe_x = start + _height;
+ stripe_context->line_to (stripe_x, _height);
+ start += stripe_separation;
+ }
+
+ stripe_context->set_source_rgba (1.0, 1.0, 1.0, 1.0);
+ stripe_context->set_line_cap (Cairo::LINE_CAP_SQUARE);
+ stripe_context->set_line_width(50);
+ stripe_context->stroke();
+
+ Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (image);
+
+ context->set_source_rgba (1.0, 1.0, 0.0, 0.3);
+ context->mask (stripe, 0, 0);
+ context->fill ();
}
struct LineTips {
- double top;
- double bot;
- bool clip_max;
- bool clip_min;
-
- LineTips() : top (0.0), bot (0.0), clip_max (false), clip_min (false) {}
+ double top;
+ double bot;
+ double spread;
+ bool clip_max;
+ bool clip_min;
+
+ LineTips() : top (0.0), bot (0.0), clip_max (false), clip_min (false) {}
+};
+
+struct ImageSet {
+ Cairo::RefPtr<Cairo::ImageSurface> wave;
+ Cairo::RefPtr<Cairo::ImageSurface> outline;
+ Cairo::RefPtr<Cairo::ImageSurface> clip;
+ Cairo::RefPtr<Cairo::ImageSurface> zero;
+
+ ImageSet() :
+ wave (0), outline (0), clip (0), zero (0) {}
};
void
-WaveView::draw_image (PeakData* _peaks, int n_peaks) const
+WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peaks, int n_peaks) const
{
- _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
- Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
+ ImageSet images;
+
+ images.wave = Cairo::ImageSurface::create (Cairo::FORMAT_A8, n_peaks, _height);
+ images.outline = Cairo::ImageSurface::create (Cairo::FORMAT_A8, n_peaks, _height);
+ images.clip = Cairo::ImageSurface::create (Cairo::FORMAT_A8, n_peaks, _height);
+ images.zero = Cairo::ImageSurface::create (Cairo::FORMAT_A8, n_peaks, _height);
+
+ Cairo::RefPtr<Cairo::Context> wave_context = Cairo::Context::create (images.wave);
+ Cairo::RefPtr<Cairo::Context> outline_context = Cairo::Context::create (images.outline);
+ Cairo::RefPtr<Cairo::Context> clip_context = Cairo::Context::create (images.clip);
+ Cairo::RefPtr<Cairo::Context> zero_context = Cairo::Context::create (images.zero);
+ wave_context->set_antialias (Cairo::ANTIALIAS_NONE);
+ outline_context->set_antialias (Cairo::ANTIALIAS_NONE);
+ clip_context->set_antialias (Cairo::ANTIALIAS_NONE);
+ zero_context->set_antialias (Cairo::ANTIALIAS_NONE);
boost::scoped_array<LineTips> tips (new LineTips[n_peaks]);
has been scaled by scale_amplitude() already.
*/
- const double clip_level = _clip_level * _region->scale_amplitude();
+ const double clip_level = _clip_level * _region_amplitude;
if (_shape == WaveView::Rectified) {
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)))));
- if (fabs (_peaks[i].max) >= clip_level) {
+ tips[i].bot = height() - 1.0;
+ const double p = alt_log_meter (fast_coefficient_to_dB (max (fabs (_peaks[i].max), fabs (_peaks[i].min))));
+ tips[i].top = y_extent (p, false);
+ tips[i].spread = p * (_height - 1.0);
+
+ if (_peaks[i].max >= clip_level) {
tips[i].clip_max = true;
}
- if (fabs (_peaks[i].min) >= clip_level) {
+ if (-(_peaks[i].min) >= clip_level) {
tips[i].clip_min = true;
}
}
- } 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)));
- if (fabs (_peaks[i].max) >= clip_level) {
- tips[i].clip_max = true;
- }
+ } else {
+ for (int i = 0; i < n_peaks; ++i) {
- if (fabs (_peaks[i].min) >= clip_level) {
- tips[i].clip_min = true;
+ tips[i].bot = height() - 1.0;
+ const double p = max(fabs (_peaks[i].max), fabs (_peaks[i].min));
+ tips[i].top = y_extent (p, false);
+ tips[i].spread = p * (_height - 2.0);
+ if (p >= clip_level) {
+ tips[i].clip_max = true;
}
}
+
}
} else {
if (_logscaled) {
for (int i = 0; i < n_peaks; ++i) {
- Coord top = _peaks[i].min;
- Coord bot = _peaks[i].max;
+ double top = _peaks[i].max;
+ double bot = _peaks[i].min;
- if (fabs (top) >= clip_level) {
- tips[i].clip_max = true;
+ if (_peaks[i].max >= clip_level) {
+ tips[i].clip_max = true;
}
-
- if (fabs (bot) >= clip_level) {
+ if (-(_peaks[i].min) >= clip_level) {
tips[i].clip_min = true;
}
if (top > 0.0) {
- top = position (alt_log_meter (fast_coefficient_to_dB (top)));
+ top = alt_log_meter (fast_coefficient_to_dB (top));
} else if (top < 0.0) {
- top = position (-alt_log_meter (fast_coefficient_to_dB (-top)));
+ top =-alt_log_meter (fast_coefficient_to_dB (-top));
} else {
- top = position (0.0);
+ top = 0.0;
}
if (bot > 0.0) {
- bot = position (alt_log_meter (fast_coefficient_to_dB (bot)));
+ bot = alt_log_meter (fast_coefficient_to_dB (bot));
} else if (bot < 0.0) {
- bot = position (-alt_log_meter (fast_coefficient_to_dB (-bot)));
+ bot = -alt_log_meter (fast_coefficient_to_dB (-bot));
} else {
- bot = position (0.0);
+ bot = 0.0;
}
- tips[i].top = top;
- tips[i].bot = bot;
- }
+ tips[i].top = y_extent (top, false);
+ tips[i].bot = y_extent (bot, true);
+ tips[i].spread = tips[i].bot - tips[i].top;
+ }
} else {
for (int i = 0; i < n_peaks; ++i) {
-
- if (fabs (_peaks[i].max) >= clip_level) {
+ if (_peaks[i].max >= clip_level) {
tips[i].clip_max = true;
}
-
- if (fabs (_peaks[i].min) >= clip_level) {
+ if (-(_peaks[i].min) >= clip_level) {
tips[i].clip_min = true;
}
- tips[i].top = position (_peaks[i].min);
- tips[i].bot = position (_peaks[i].max);
+ tips[i].top = y_extent (_peaks[i].max, false);
+ tips[i].bot = y_extent (_peaks[i].min, true);
+ tips[i].spread = tips[i].bot - tips[i].top;
+ }
+
+ }
+ }
+ Color alpha_one = rgba_to_color (0, 0, 0, 1.0);
+
+ set_source_rgba (wave_context, alpha_one);
+ set_source_rgba (outline_context, alpha_one);
+ set_source_rgba (clip_context, alpha_one);
+ set_source_rgba (zero_context, alpha_one);
+
+ /* ensure single-pixel lines */
+
+ wave_context->set_line_width (1.0);
+ wave_context->translate (0.5, +0.5);
+
+ outline_context->set_line_width (1.0);
+ outline_context->translate (0.5, +0.5);
+
+ clip_context->set_line_width (1.0);
+ clip_context->translate (0.5, +0.5);
+
+ zero_context->set_line_width (1.0);
+ zero_context->translate (0.5, +0.5);
+
+ /* the height of the clip-indicator should be at most 7 pixels,
+ * or 5% of the height of the waveview item.
+ */
+
+ const double clip_height = min (7.0, ceil (_height * 0.05));
+ bool draw_outline_as_wave = false;
+
+ /* There are 3 possible components to draw at each x-axis position: the
+ waveform "line", the zero line and an outline/clip indicator. We
+ have to decide which of the 3 to draw at each position, pixel by
+ pixel. This makes the rendering less efficient but it is the only
+ way I can see to do this correctly.
+
+ To avoid constant source swapping and stroking, we draw the components separately
+ onto four alpha only image surfaces for use as a mask.
+
+ With only 1 pixel of spread between the top and bottom of the line,
+ we just draw the upper outline/clip indicator.
+
+ With 2 pixels of spread, we draw the upper and lower outline clip
+ indicators.
+
+ With 3 pixels of spread we draw the upper and lower outline/clip
+ indicators and at least 1 pixel of the waveform line.
+
+ With 5 pixels of spread, we draw all components.
+
+ We can do rectified as two separate passes because we have a much
+ easier decision regarding whether to draw the waveform line. We
+ always draw the clip/outline indicators.
+ */
+
+ if (_shape == WaveView::Rectified) {
+
+ for (int i = 0; i < n_peaks; ++i) {
+
+ /* waveform line */
+
+ if (tips[i].spread >= 1.0) {
+ wave_context->move_to (i, tips[i].top);
+ wave_context->line_to (i, tips[i].bot);
+ }
+
+ if (_global_show_waveform_clipping && (tips[i].clip_max)) {
+ clip_context->move_to (i, tips[i].top);
+ /* clip-indicating upper terminal line */
+ clip_context->rel_line_to (0, min (clip_height, ceil(tips[i].spread + .5)));
+ } else {
+ outline_context->move_to (i, tips[i].top);
+ /* normal upper terminal dot */
+ outline_context->close_path ();
+ }
+ }
+
+ wave_context->stroke ();
+ clip_context->stroke ();
+ outline_context->stroke ();
+
+ } else {
+ const double height_2 = (_height - 4.0) * .5;
+
+ for (int i = 0; i < n_peaks; ++i) {
+
+ /* waveform line */
+
+ if (tips[i].spread >= 2.0) {
+ wave_context->move_to (i, tips[i].top);
+ wave_context->line_to (i, tips[i].bot);
+ }
+ /* draw square waves and other discontiguous points clearly */
+ if (i > 0) {
+ if (tips[i-1].top + 2 < tips[i].top) {
+ wave_context->move_to (i-1, tips[i-1].top);
+ wave_context->line_to (i-1, (tips[i].bot + tips[i-1].top)/2);
+ wave_context->move_to (i, (tips[i].bot + tips[i-1].top)/2);
+ wave_context->line_to (i, tips[i].top);
+ } else if (tips[i-1].bot > tips[i].bot + 2) {
+ wave_context->move_to (i-1, tips[i-1].bot);
+ wave_context->line_to (i-1, (tips[i].top + tips[i-1].bot)/2);
+ wave_context->move_to (i, (tips[i].top + tips[i-1].bot)/2);
+ wave_context->line_to (i, tips[i].bot);
+ }
+ }
+
+ /* zero line */
+ if (tips[i].spread >= 5.0 && show_zero_line()) {
+ zero_context->move_to (i, floor(height_2));
+ zero_context->rel_line_to (1.0, 0);
+ }
+ if (tips[i].spread > 1.0) {
+ draw_outline_as_wave = false;
+ /* lower outline/clip indicator */
+ if (_global_show_waveform_clipping && tips[i].clip_min) {
+ clip_context->move_to (i, tips[i].bot);
+ /* clip-indicating lower terminal line */
+ const double sign = tips[i].bot > height_2 ? -1 : 1;
+ clip_context->rel_line_to (0, sign * min (clip_height, ceil (tips[i].spread + .5)));
+ } else {
+ outline_context->move_to (i, tips[i].bot + 0.5);
+ /* normal lower terminal dot */
+ outline_context->rel_line_to (0, -0.5);
+ }
+ } else {
+ draw_outline_as_wave = true;
+ if (tips[i].clip_min) {
+ // make sure we draw the clip
+ tips[i].clip_max = true;
+ }
+ }
+
+ /* upper outline/clip indicator */
+ if (_global_show_waveform_clipping && tips[i].clip_max) {
+ clip_context->move_to (i, tips[i].top);
+ /* clip-indicating upper terminal line */
+ const double sign = tips[i].top > height_2 ? -1 : 1;
+ clip_context->rel_line_to (0, sign * min(clip_height, ceil(tips[i].spread + .5)));
+ } else {
+ if (draw_outline_as_wave) {
+ wave_context->move_to (i, tips[i].top + 0.5);
+ /* special case where outline only is drawn.
+ is this correct? too short by 0.5?
+ */
+ wave_context->rel_line_to (0, -0.5);
+ } else {
+ outline_context->move_to (i, tips[i].top + 0.5);
+ /* normal upper terminal dot */
+ outline_context->rel_line_to (0, -0.5);
+ }
}
}
+
+ wave_context->stroke ();
+ outline_context->stroke ();
+ clip_context->stroke ();
+ zero_context->stroke ();
}
+ Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (image);
+
+ /* Here we set a source colour and use the various components as a mask. */
+
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;
+ stops[1] = 0.3;
+ stops[2] = 0.9;
} else {
stops[0] = 0.1;
stops[1] = 0.5;
}
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);
-
+ gradient->add_color_stop_rgba (stops[1], 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 center = hsva_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);
-
+
+ gradient->add_color_stop_rgba (stops[0], r, g, b, a);
+ gradient->add_color_stop_rgba (stops[2], 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);
+ context->mask (images.wave, 0, 0);
+ context->fill ();
- /* draw the lines */
+ set_source_rgba (context, _outline_color);
+ context->mask (images.outline, 0, 0);
+ context->fill ();
- 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 ();
- }
+ set_source_rgba (context, _clip_color);
+ context->mask (images.clip, 0, 0);
+ context->fill ();
+
+ set_source_rgba (context, _zero_color);
+ context->mask (images.zero, 0, 0);
+ context->fill ();
+
+}
+
+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;
}
- /* now add dots to the top and bottom of each line (this is
- * modelled on pyramix, except that we add clipping indicators.
- */
+ /* Find a suitable ImageSurface.
+ */
+ for (uint32_t i = 0; i < caches.size (); ++i) {
- if (_global_show_waveform_clipping) {
-
- context->set_source_rgba (0, 0, 0, 1.0);
-
- /* the height of the clip-indicator should be at most 7 pixels,
- or 5% of the height of the waveview item.
- */
- const double clip_height = min (7.0, ceil (_height * 0.05));
-
- for (int i = 0; i < n_peaks; ++i) {
- context->move_to (i, tips[i].top);
-
- bool show_top_clip = (_shape == WaveView::Rectified && (tips[i].clip_max || tips[i].clip_min)) ||
- tips[i].clip_max;
-
- if (show_top_clip) {
- context->set_source_rgba (1.0, 0, 0, 1.0);
- context->rel_line_to (0, clip_height);
- context->stroke ();
- context->set_source_rgba (0.0, 0, 0, 1.0);
- } else {
- context->rel_line_to (0, 1.0);
- context->stroke ();
- }
+ if (_channel != caches[i].channel
+ || _height != caches[i].height
+ || _region_amplitude != caches[i].amplitude
+ || _fill_color != caches[i].fill_color) {
- if (_shape != WaveView::Rectified) {
- context->move_to (i, tips[i].bot);
- if (tips[i].clip_min) {
- context->set_source_rgba (1.0, 0, 0, 1.0);
- context->rel_line_to (0, -clip_height);
- context->stroke ();
- context->set_source_rgba (0.0, 0, 0, 1.0);
- } else {
- context->rel_line_to (0, -1.0);
- context->stroke ();
- }
- }
+ continue;
}
- }
- if (show_zero_line()) {
+ framepos_t segment_start = caches[i].start;
+ framepos_t segment_end = caches[i].end;
- set_source_rgba (context, _zero_color);
- context->set_line_width (1.0);
- context->move_to (0, position (0.0) + 0.5);
- context->line_to (n_peaks, position (0.0) + 0.5);
- context->stroke ();
- }
-}
+ if (end <= segment_end && start >= segment_start) {
+ image_offset = (segment_start - _region_start) / _samples_per_pixel;
+ image = caches[i].image;
-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;
+ return;
+ }
}
+ consolidate_image_cache ();
+
/* sample position is canonical here, and we want to generate
- * an image that spans about twice the canvas width
+ * an image that spans about twice the canvas width
*/
-
+
const framepos_t center = start + ((end - start) / 2);
- const framecnt_t canvas_samples = 2 * (_canvas->visible_area().width() * _samples_per_pixel);
+ 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
*/
- _sample_start = max ((framepos_t) 0, (center - canvas_samples));
- _sample_end = min (center + canvas_samples, _region->source_length (0));
+ framepos_t sample_start = max ((framepos_t) 0, (center - canvas_samples));
+ framepos_t sample_end = min (center + canvas_samples, _region->source_length (0));
- 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);
+ 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,
+ framecnt_t peaks_read;
+ peaks_read = _region->read_peaks (peaks.get(), n_peaks,
+ sample_start, sample_end - sample_start,
+ _channel,
_samples_per_pixel);
- draw_image (peaks.get(), n_peaks);
+ image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
+
+ if (peaks_read > 0) {
+ draw_image (image, peaks.get(), n_peaks);
+ } else {
+ draw_absent_image (image, peaks.get(), n_peaks);
+ }
+
+ _image_cache[_region->audio_source ()].push_back (CacheEntry (_channel, _height, _region_amplitude, _fill_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
return;
}
- Rect self = item_to_window (Rect (0.0, 0.0, floor (_region->length() / _samples_per_pixel), _height));
+ Rect self = item_to_window (Rect (0.0, 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 up and down in case we were asked to
+ * 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 = ceil (draw.x1);
+
+ 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.
+ * representing.
*/
const framepos_t image_start = window_to_image (self.x0, draw_start);
/* 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;
- ensure_cache (sample_start, sample_end);
-
- // cerr << "Cache contains " << _cache->pixel_start() << " .. " << _cache->pixel_end() << " / "
- // << _cache->sample_start() << " .. " << _cache->sample_end()
- // << endl;
+ Cairo::RefPtr<Cairo::ImageSurface> image;
+ double image_offset = 0;
- double image_offset = (_sample_start - _region->start()) / _samples_per_pixel;
+ get_image (image, sample_start, sample_end, image_offset);
// cerr << "Offset into image to place at zero: " << image_offset << endl;
+ if (_start_shift && (sample_start == _region_start) && (self.x0 == draw.x0)) {
+ /* we are going to draw the first pixel for this region, but
+ we may not want this to overlap a border around the
+ waveform. If so, _start_shift will be set.
+ */
+ //cerr << name.substr (23) << " ss = " << sample_start << " rs = " << _region_start << " sf = " << _start_shift << " ds = " << draw_start << " self = " << self << " draw = " << draw << endl;
+ //draw_start += _start_shift;
+ //image_offset += _start_shift;
+ }
+
context->rectangle (draw_start, draw.y0, draw_end - draw_start, draw.height());
/* round image origin position to an exact pixel in device space to
y = round (y);
context->device_to_user (x, y);
- context->set_source (_image, x, y);
+ context->set_source (image, x, y);
context->fill ();
+
}
void
} 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 ();
-
- invalidate_image ();
}
}
{
if (channel != _channel) {
begin_change ();
-
+
+ invalidate_image_cache ();
_channel = channel;
-
+
_bounding_box_dirty = true;
end_change ();
-
- invalidate_image ();
}
}
-void
-WaveView::invalidate_image ()
-{
- begin_visual_change ();
-
- _image.clear ();
- _sample_start = -1;
- _sample_end = -1;
-
- end_visual_change ();
-}
-
-
void
WaveView::set_logscaled (bool yn)
{
if (_logscaled != yn) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_logscaled = yn;
- invalidate_image ();
+ end_visual_change ();
}
}
void
WaveView::gain_changed ()
{
- invalidate_image ();
+ 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;
- invalidate_image ();
+ end_visual_change ();
}
}
WaveView::set_clip_color (Color c)
{
if (_clip_color != c) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_clip_color = c;
- invalidate_image ();
+ end_visual_change ();
}
}
WaveView::set_show_zero_line (bool yn)
{
if (_show_zero != yn) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_show_zero = yn;
- invalidate_image ();
+ end_visual_change ();
}
}
WaveView::set_shape (Shape s)
{
if (_shape != s) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_shape = s;
- invalidate_image ();
+ end_visual_change ();
}
}
WaveView::set_amplitude_above_axis (double a)
{
if (_amplitude_above_axis != a) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_amplitude_above_axis = a;
- invalidate_image ();
+ end_visual_change ();
}
}
}
void
-WaveView::region_resized ()
+WaveView::set_region_start (frameoffset_t start)
{
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;
+ if (_region_start == start) {
+ return;
+ }
+ begin_change ();
+ _region_start = start;
_bounding_box_dirty = true;
- compute_bounding_box ();
-
end_change ();
}
-Coord
-WaveView::position (double s) const
+void
+WaveView::region_resized ()
{
- /* it is important that this returns an integral value, so that we
- can ensure correct single pixel behaviour.
- */
-
- Coord pos;
+ /* Called when the region start or end (thus length) has changed.
+ */
- switch (_shape) {
- case Rectified:
- pos = floor (_height - (s * _height));
- default:
- pos = floor ((1.0-s) * (_height / 2.0));
- break;
+ if (!_region) {
+ return;
}
- return min (_height, (max (0.0, pos)));
+ begin_change ();
+ _region_start = _region->start();
+ _bounding_box_dirty = true;
+ end_change ();
}
void
{
if (_global_show_waveform_clipping != yn) {
_global_show_waveform_clipping = yn;
- VisualPropertiesChanged (); /* EMIT SIGNAL */
+ ClipLevelChanged ();
}
}
+void
+WaveView::set_start_shift (double pixels)
+{
+ if (pixels < 0) {
+ return;
+ }
+
+ begin_visual_change ();
+ _start_shift = pixels;
+ end_visual_change ();
+}
+
projects / ardour.git / blobdiff