#include <cmath>
#include <cairomm/cairomm.h>
+#include <glibmm/threads.h>
+
#include "gtkmm2ext/utils.h"
+#include "gtkmm2ext/gui_thread.h"
+#include "pbd/base_ui.h"
#include "pbd/compose.h"
+#include "pbd/convert.h"
#include "pbd/signals.h"
#include "pbd/stacktrace.h"
#include "ardour/types.h"
#include "ardour/dB.h"
+#include "ardour/lmath.h"
#include "ardour/audioregion.h"
+#include "ardour/audiosource.h"
+#include "ardour/session.h"
-#include "canvas/wave_view.h"
-#include "canvas/utils.h"
#include "canvas/canvas.h"
+#include "canvas/colors.h"
+#include "canvas/debug.h"
+#include "canvas/utils.h"
+#include "canvas/wave_view.h"
+
+#include "evoral/Range.hpp"
#include <gdkmm/general.h>
+#include "gtkmm2ext/gui_thread.h"
+
using namespace std;
using namespace ARDOUR;
+using namespace PBD;
using namespace ArdourCanvas;
double WaveView::_global_gradient_depth = 0.6;
bool WaveView::_global_show_waveform_clipping = true;
double WaveView::_clip_level = 0.98853;
+WaveViewCache* WaveView::images = 0;
+gint WaveView::drawing_thread_should_quit = 0;
+Glib::Threads::Mutex WaveView::request_queue_lock;
+Glib::Threads::Mutex WaveView::current_image_lock;
+Glib::Threads::Cond WaveView::request_cond;
+Glib::Threads::Thread* WaveView::_drawing_thread = 0;
+WaveView::DrawingRequestQueue WaveView::request_queue;
+
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())
+ , get_image_in_thread (false)
+ , always_get_image_in_thread (false)
+ , rendered (false)
+{
+ if (!images) {
+ images = new WaveViewCache;
+ }
+
+ 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));
+
+ ImageReady.connect (image_ready_connection, invalidator (*this), boost::bind (&WaveView::image_ready, this), gui_context());
+}
+
+WaveView::WaveView (Item* parent, boost::shared_ptr<ARDOUR::AudioRegion> region)
: Item (parent)
- , Outline (parent)
- , Fill (parent)
, _region (region)
, _channel (0)
, _samples_per_pixel (0)
, _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())
- , _sample_start (-1)
- , _sample_end (-1)
+ , get_image_in_thread (false)
+ , always_get_image_in_thread (false)
+ , rendered (false)
{
+ if (!images) {
+ images = new WaveViewCache;
+ }
+
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));
+
+ ImageReady.connect (image_ready_connection, invalidator (*this), boost::bind (&WaveView::image_ready, this), gui_context());
}
WaveView::~WaveView ()
{
+ invalidate_image_cache ();
+ if (images ) {
+ images->clear_cache ();
+ }
+}
+
+string
+WaveView::debug_name() const
+{
+ return _region->name() + string (":") + PBD::to_string (_channel+1, std::dec);
+}
+
+void
+WaveView::image_ready ()
+{
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("queue draw for %1 at %2 (vis = %3 CR %4)\n", this, g_get_monotonic_time(), visible(), current_request));
+ redraw ();
+}
+
+void
+WaveView::set_always_get_image_in_thread (bool yn)
+{
+ always_get_image_in_thread = yn;
}
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)
-{
- return image_start - wave_origin;
-}
-
static inline float
_log_meter (float power, double lower_db, double upper_db, double non_linearity)
{
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 ()
+{
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 invalidates image cache and cancels current request\n", this));
+ cancel_my_render_request ();
+ Glib::Threads::Mutex::Lock lci (current_image_lock);
+ _current_image.reset ();
+}
+
+void
+WaveView::compute_tips (PeakData const & peak, WaveView::LineTips& tips) const
+{
+ const double effective_height = _height;
+
+ /* remember: canvas (and cairo) coordinate space puts the origin at the upper left.
+
+ So, a sample value of 1.0 (0dbFS) will be computed as:
+
+ (1.0 - 1.0) * 0.5 * effective_height
+
+ which evaluates to 0, or the top of the image.
+
+ A sample value of -1.0 will be computed as
+
+ (1.0 + 1.0) * 0.5 * effective height
+
+ which evaluates to effective height, or the bottom of the image.
+ */
+
+ const double pmax = (1.0 - peak.max) * 0.5 * effective_height;
+ const double pmin = (1.0 - peak.min) * 0.5 * effective_height;
+
+ /* remember that the bottom of the image (pmin) has larger y-coordinates
+ than the top (pmax).
+ */
+
+ double spread = (pmin - pmax) * 0.5;
+
+ /* find the nearest pixel to the nominal center. */
+ const double center = round (pmin - spread);
+
+ if (spread < 1.0) {
+ /* minimum distance between line ends is 1 pixel, and we want it "centered" on a pixel,
+ as per cairo single-pixel line issues.
+
+ NOTE: the caller will not draw a line between these two points if the spread is
+ less than 2 pixels. So only the tips.top value matters, which is where we will
+ draw a single pixel as part of the outline.
+ */
+ tips.top = center;
+ tips.bot = center + 1.0;
+ } else {
+ /* round spread above and below center to an integer number of pixels */
+ spread = round (spread);
+ /* top and bottom are located equally either side of the center */
+ tips.top = center - spread;
+ tips.bot = center + spread;
+ }
+
+ tips.top = min (effective_height, max (0.0, tips.top));
+ tips.bot = min (effective_height, max (0.0, tips.bot));
+}
+
+
+Coord
+WaveView::y_extent (double s) const
+{
+ assert (_shape == Rectified);
+ return floor ((1.0 - s) * _height);
+}
+
+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) {}
+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, boost::shared_ptr<WaveViewThreadRequest> req) 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);
+ tips[i].spread = p * _height;
+
+ 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);
+ tips[i].spread = p * _height;
+ 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;
+ PeakData p;
+ p.max = _peaks[i].max;
+ p.min = _peaks[i].min;
- if (fabs (top) >= clip_level) {
+ 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)));
- } else if (top < 0.0) {
- top = position (-alt_log_meter (fast_coefficient_to_dB (-top)));
+ if (p.max > 0.0) {
+ p.max = alt_log_meter (fast_coefficient_to_dB (p.max));
+ } else if (p.max < 0.0) {
+ p.max =-alt_log_meter (fast_coefficient_to_dB (-p.max));
} else {
- top = position (0.0);
+ p.max = 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)));
+ if (p.min > 0.0) {
+ p.min = alt_log_meter (fast_coefficient_to_dB (p.min));
+ } else if (p.min < 0.0) {
+ p.min = -alt_log_meter (fast_coefficient_to_dB (-p.min));
} else {
- bot = position (0.0);
+ p.min = 0.0;
}
-
- tips[i].top = top;
- tips[i].bot = bot;
- }
+
+ compute_tips (p, tips[i]);
+ 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);
+ compute_tips (_peaks[i], tips[i]);
+ tips[i].spread = tips[i].bot - tips[i].top;
+ }
+
+ }
+ }
+
+ if (req->should_stop()) {
+ return;
+ }
+
+ 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));
+
+ /* 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);
+ }
+
+ /* clip indicator */
+
+ if (_global_show_waveform_clipping && (tips[i].clip_max || tips[i].clip_min)) {
+ 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->rel_line_to (0, -1.0);
+ }
+ }
+
+ wave_context->stroke ();
+ clip_context->stroke ();
+ outline_context->stroke ();
+
+ } else {
+ const int height_zero = floor( _height * .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, show only if there is enough spread
+ or the waveform line does not cross zero line */
+
+ if (show_zero_line() && ((tips[i].spread >= 5.0) || (tips[i].top > height_zero ) || (tips[i].bot < height_zero)) ) {
+ zero_context->move_to (i, height_zero);
+ zero_context->rel_line_to (1.0, 0);
+ }
+
+ if (tips[i].spread > 1.0) {
+ bool clipped = false;
+ /* outline/clip indicators */
+ 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 + 0.5)));
+ clipped = true;
+ }
+
+ if (_global_show_waveform_clipping && tips[i].clip_min) {
+ clip_context->move_to (i, tips[i].bot);
+ /* clip-indicating lower terminal line */
+ clip_context->rel_line_to (0, - min (clip_height, ceil(tips[i].spread + 0.5)));
+ clipped = true;
+ }
+ if (!clipped && tips[i].spread > 2.0) {
+ /* only draw the outline if the spread
+ implies 3 or more pixels (so that we see 1
+ white pixel in the middle).
+ */
+ outline_context->move_to (i, tips[i].bot);
+ /* normal lower terminal dot; line moves up */
+ outline_context->rel_line_to (0, -1.0);
+
+ outline_context->move_to (i, tips[i].top);
+ /* normal upper terminal dot, line moves down */
+ outline_context->rel_line_to (0, 1.0);
+ }
+ } else {
+ bool clipped = false;
+ /* outline/clip indicator */
+ if (_global_show_waveform_clipping && (tips[i].clip_max || tips[i].clip_min)) {
+ clip_context->move_to (i, tips[i].top);
+ /* clip-indicating upper / lower terminal line */
+ clip_context->rel_line_to (0, 1.0);
+ clipped = true;
+ }
+ if (!clipped) {
+ /* special case where only 1 pixel of
+ * the waveform line is drawn (and
+ * nothing else).
+ *
+ * we draw a 1px "line", pretending
+ * that the span is 1.0 (whether it is
+ * zero or 1.0)
+ */
+ wave_context->move_to (i, tips[i].top);
+ wave_context->rel_line_to (0, 1.0);
+ }
}
}
+
+ wave_context->stroke ();
+ outline_context->stroke ();
+ clip_context->stroke ();
+ zero_context->stroke ();
+ }
+
+ if (req->should_stop()) {
+ return;
}
+
+ 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);
-
- /* 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 (req->should_stop()) {
+ return;
}
+
+ context->mask (images.wave, 0, 0);
+ context->fill ();
- /* now add dots to the top and bottom of each line (this is
- * modelled on pyramix, except that we add clipping indicators.
- */
-
- if (_global_show_waveform_clipping) {
-
- set_source_rgba (context, _outline_color);
-
- /* 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) {
- set_source_rgba (context, _clip_color);
- context->rel_line_to (0, clip_height);
- context->stroke ();
- set_source_rgba (context, _outline_color);
- } else {
- context->rel_line_to (0, 1.0);
- context->stroke ();
- }
-
- if (_shape != WaveView::Rectified) {
- context->move_to (i, tips[i].bot);
- if (tips[i].clip_min) {
- set_source_rgba (context, _clip_color);
- context->rel_line_to (0, -clip_height);
- context->stroke ();
- set_source_rgba (context, _outline_color);
- } else {
- context->rel_line_to (0, -1.0);
- context->stroke ();
- }
- }
- }
- }
+ set_source_rgba (context, _outline_color);
+ context->mask (images.outline, 0, 0);
+ context->fill ();
- if (show_zero_line()) {
+ set_source_rgba (context, _clip_color);
+ context->mask (images.clip, 0, 0);
+ context->fill ();
- 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 ();
- }
+ set_source_rgba (context, _zero_color);
+ context->mask (images.zero, 0, 0);
+ context->fill ();
}
-void
-WaveView::ensure_cache (framepos_t start, framepos_t end) const
+boost::shared_ptr<WaveViewCache::Entry>
+WaveView::cache_request_result (boost::shared_ptr<WaveViewThreadRequest> req) 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 = 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
+ boost::shared_ptr<WaveViewCache::Entry> ret (new WaveViewCache::Entry (req->channel,
+ req->height,
+ req->amplitude,
+ req->fill_color,
+ req->samples_per_pixel,
+ req->start,
+ req->end,
+ req->image));
+ images->add (_region->audio_source (_channel), ret);
+
+ /* consolidate cache first (removes fully-contained
+ * duplicate images)
*/
+
+ images->consolidate_image_cache (_region->audio_source (_channel),
+ req->channel, req->height, req->amplitude,
+ req->fill_color, req->samples_per_pixel);
- _sample_start = max ((framepos_t) 0, (center - canvas_samples));
- _sample_end = min (center + canvas_samples, _region->source_length (0));
+ return ret;
+}
- 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);
+boost::shared_ptr<WaveViewCache::Entry>
+WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const
+{
+ boost::shared_ptr<WaveViewCache::Entry> ret;
- boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
+ full_image = true;
+
+ /* this is called from a ::render() call, when we need an image to
+ draw with.
+ */
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 needs image from %2 .. %3\n", name, start, end));
+
+
+ {
+ Glib::Threads::Mutex::Lock lmq (request_queue_lock);
+
+ /* if there's a draw request outstanding, check to see if we
+ * have an image there. if so, use it (and put it in the cache
+ * while we're here.
+ */
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 CR %2 stop? %3 image %4\n", this, current_request,
+ (current_request ? current_request->should_stop() : false),
+ (current_request ? current_request->image : 0)));
+
+ if (current_request && !current_request->should_stop() && current_request->image) {
+
+ /* put the image into the cache so that other
+ * WaveViews can use it if it is useful
+ */
+
+ if (current_request->start <= start && current_request->end >= end) {
+
+ ret.reset (new WaveViewCache::Entry (current_request->channel,
+ current_request->height,
+ current_request->amplitude,
+ current_request->fill_color,
+ current_request->samples_per_pixel,
+ current_request->start,
+ current_request->end,
+ current_request->image));
+
+ cache_request_result (current_request);
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1: got image from completed request, spans %2..%3\n",
+ name, current_request->start, current_request->end));
+ }
+
+ /* drop our handle on the current request */
+ current_request.reset ();
+ }
+ }
+
+ if (!ret) {
+
+ /* no current image draw request, so look in the cache */
+
+ ret = get_image_from_cache (start, end, full_image);
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1: lookup from cache gave %2 (full %3)\n",
+ name, ret, full_image));
+
+ }
+
+
+
+ if (!ret || !full_image) {
- _region->read_peaks (peaks.get(), n_peaks,
- _sample_start, _sample_end - _sample_start,
- _channel,
- _samples_per_pixel);
+ if ((rendered && get_image_in_thread) || always_get_image_in_thread) {
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1: generating image in caller thread\n", name));
+
+ boost::shared_ptr<WaveViewThreadRequest> req (new WaveViewThreadRequest);
+
+ req->type = WaveViewThreadRequest::Draw;
+ req->start = start;
+ req->end = end;
+ req->samples_per_pixel = _samples_per_pixel;
+ req->region = _region; /* weak ptr, to avoid storing a reference in the request queue */
+ req->channel = _channel;
+ req->height = _height;
+ req->fill_color = _fill_color;
+ req->amplitude = _region_amplitude * _amplitude_above_axis;
+ req->width = desired_image_width ();
+
+ /* draw image in this (the GUI thread) */
+
+ generate_image (req, false);
- draw_image (peaks.get(), n_peaks);
+ /* cache the result */
+
+ ret = cache_request_result (req);
+
+ /* reset this so that future missing images are
+ * generated in a a worker thread.
+ */
+
+ get_image_in_thread = false;
+
+ } else {
+ queue_get_image (_region, start, end);
+ }
+ }
+
+ if (ret) {
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 got an image from %2 .. %3 (full ? %4)\n", name, ret->start, ret->end, full_image));
+ } else {
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 no useful image available\n", name));
+ }
+
+ return ret;
+}
+
+boost::shared_ptr<WaveViewCache::Entry>
+WaveView::get_image_from_cache (framepos_t start, framepos_t end, bool& full) const
+{
+ if (!images) {
+ return boost::shared_ptr<WaveViewCache::Entry>();
+ }
+
+ return images->lookup_image (_region->audio_source (_channel), start, end, _channel,
+ _height, _region_amplitude * _amplitude_above_axis, _fill_color, _samples_per_pixel, full);
+}
+
+framecnt_t
+WaveView::desired_image_width () const
+{
+ /* compute how wide the image should be, in samples.
+ *
+ * We want at least 1 canvas width's worth, but if that
+ * represents less than 1/10th of a second, use 1/10th of
+ * a second instead.
+ */
+
+ framecnt_t canvas_width_samples = _canvas->visible_area().width() * _samples_per_pixel;
+ const framecnt_t one_tenth_of_second = _region->session().frame_rate() / 10;
+
+ if (canvas_width_samples > one_tenth_of_second) {
+ return canvas_width_samples;
+ }
+
+ return one_tenth_of_second;
+}
+
+void
+WaveView::queue_get_image (boost::shared_ptr<const ARDOUR::Region> region, framepos_t start, framepos_t end) const
+{
+ boost::shared_ptr<WaveViewThreadRequest> req (new WaveViewThreadRequest);
+
+ req->type = WaveViewThreadRequest::Draw;
+ req->start = start;
+ req->end = end;
+ req->samples_per_pixel = _samples_per_pixel;
+ req->region = _region; /* weak ptr, to avoid storing a reference in the request queue */
+ req->channel = _channel;
+ req->height = _height;
+ req->fill_color = _fill_color;
+ req->amplitude = _region_amplitude * _amplitude_above_axis;
+ req->width = desired_image_width ();
+
+ if (current_request) {
+ /* this will stop rendering in progress (which might otherwise
+ be long lived) for any current request.
+ */
+ current_request->cancel ();
+ }
+
+ start_drawing_thread ();
+
+ /* swap requests (protected by lock) */
+
+ {
+ Glib::Threads::Mutex::Lock lm (request_queue_lock);
+ current_request = req;
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 now has current request %2\n", this, req));
+
+ if (request_queue.insert (this).second) {
+ /* this waveview was not already in the request queue, make sure we wake
+ the rendering thread in case it is asleep.
+ */
+ request_cond.signal ();
+ }
+ }
+}
+
+void
+WaveView::generate_image (boost::shared_ptr<WaveViewThreadRequest> req, bool in_render_thread) const
+{
+ if (!req->should_stop()) {
+
+ /* sample position is canonical here, and we want to generate
+ * an image that spans about 3x the canvas width. We get to that
+ * width by using an image sample count of the screen width added
+ * on each side of the desired image center.
+ */
+
+ const framepos_t center = req->start + ((req->end - req->start) / 2);
+ const framecnt_t image_samples = req->width;
+
+ /* we can request data from anywhere in the Source, between 0 and its length
+ */
+
+ framepos_t sample_start = max (_region_start, (center - image_samples));
+ framepos_t sample_end = min (center + image_samples, region_end());
+ const int n_peaks = llrintf ((sample_end - sample_start)/ (req->samples_per_pixel));
+
+ boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
+
+ /* Note that Region::read_peaks() takes a start position based on an
+ offset into the Region's **SOURCE**, rather than an offset into
+ the Region itself.
+ */
+
+ framecnt_t peaks_read = _region->read_peaks (peaks.get(), n_peaks,
+ sample_start, sample_end - sample_start,
+ req->channel,
+ req->samples_per_pixel);
+
+ req->image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, req->height);
+ /* make sure we record the sample positions that were actually used */
+ req->start = sample_start;
+ req->end = sample_end;
+
+ if (peaks_read > 0) {
+
+ /* region amplitude will have been used to generate the
+ * peak values already, but not the visual-only
+ * amplitude_above_axis. So apply that here before
+ * rendering.
+ */
+
+ if (_amplitude_above_axis != 1.0) {
+ for (framecnt_t i = 0; i < n_peaks; ++i) {
+ peaks[i].max *= _amplitude_above_axis;
+ peaks[i].min *= _amplitude_above_axis;
+ }
+ }
+
+ draw_image (req->image, peaks.get(), n_peaks, req);
+ } else {
+ draw_absent_image (req->image, peaks.get(), n_peaks);
+ }
+ } else {
+ cerr << "Request stopped before image generation\n";
+ }
+
+ if (in_render_thread && !req->should_stop()) {
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("done with request for %1 at %2 CR %3 req %4 range %5 .. %6\n", this, g_get_monotonic_time(), current_request, req, req->start, req->end));
+ const_cast<WaveView*>(this)->ImageReady (); /* emit signal */
+ }
+
+ cerr << "Generate image done, image = " << req->image << endl;
+
+ return;
+}
+
+/** Given a waveform that starts at window x-coordinate @param wave_origin
+ * and the first pixel that we will actually draw @param draw_start, return
+ * the offset into an image of the entire waveform that we will need to use.
+ *
+ * Note: most of our cached images are NOT of the entire waveform, this is just
+ * computationally useful when determining which the sample range span for
+ * the image we need.
+ */
+static inline double
+window_to_image (double wave_origin, double image_start)
+{
+ return image_start - wave_origin;
}
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 (0.0, 0.0, floor (_region->length() / _samples_per_pixel), _height));
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("render %1 at %2\n", this, g_get_monotonic_time()));
+
+ /* a WaveView is intimately connected to an AudioRegion. It will
+ * display the waveform within the region, anywhere from the start of
+ * the region to its end.
+ *
+ * the area we've been aked to render may overlap with area covered
+ * by the region in any of the normal ways:
+ *
+ * - it may begin and end within the area covered by the region
+ * - it may start before and end after the area covered by region
+ * - it may start before and end within the area covered by the region
+ * - it may start within and end after the area covered by the region
+ * - it may be precisely coincident with the area covered by region.
+ *
+ * So let's start by determining the area covered by the region, in
+ * window coordinates. It begins at zero (in item coordinates for this
+ * waveview, and extends to region_length() / _samples_per_pixel.
+ */
+
+ Rect self = item_to_window (Rect (0.0, 0.0, region_length() / _samples_per_pixel, _height));
+
+ // cerr << name << " RENDER " << area << " self = " << self << endl;
+
+ /* Now lets get the intersection with the area we've been asked to draw */
+
boost::optional<Rect> d = self.intersection (area);
if (!d) {
return;
}
-
+
Rect draw = d.get();
+ /* "draw" is now a rectangle that defines the rectangle we need to
+ * update/render the waveview into, in window coordinate space.
+ */
+
/* 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.
*/
+
+ double draw_start = floor (draw.x0);
+ const double draw_end = floor (draw.x1);
- const double draw_start = floor (draw.x0);
- const double draw_end = ceil (draw.x1);
-
- // cerr << "Need to draw " << draw_start << " .. " << draw_end << endl;
+ // cerr << "Need to draw " << draw_start << " .. " << draw_end << " vs. " << area << " and self = " << self << 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.
+ * that begins 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 */
+
+ /* sample coordinates - note, these are not subject to rounding error
+ *
+ * "sample_start = N" means "the first sample we need to represent is N
+ * samples after the first sample of the region"
+ */
+
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 << " @ " << _samples_per_pixel << " rs = " << _region_start << endl;
- // cerr << "Sample space: " << sample_start << " .. " << sample_end << endl;
+ /* sample_start and sample_end are bounded by the region
+ * limits. sample_start, because of the was just computed, must already
+ * be greater than or equal to the _region_start value.
+ */
+
+ sample_end = min (region_end(), sample_end);
+
+ // cerr << debug_name() << " will need image spanning " << sample_start << " .. " << sample_end << " region spans " << _region_start << " .. " << region_end() << endl;
- ensure_cache (sample_start, sample_end);
+ double image_origin_in_self_coordinates;
+ boost::shared_ptr<WaveViewCache::Entry> image_to_draw;
+
+ Glib::Threads::Mutex::Lock lci (current_image_lock);
+ if (_current_image) {
- // cerr << "Cache contains " << _cache->pixel_start() << " .. " << _cache->pixel_end() << " / "
- // << _cache->sample_start() << " .. " << _cache->sample_end()
- // << endl;
+ /* check it covers the right sample range */
+
+ if (_current_image->start > sample_start || _current_image->end < sample_end) {
+ /* doesn't cover the area we need ... reset */
+ _current_image.reset ();
+ } else {
+ /* timestamp our continuing use of this image/cache entry */
+ images->use (_region->audio_source (_channel), _current_image);
+ image_to_draw = _current_image;
+ }
+ }
- double image_offset = (_sample_start - _region->start()) / _samples_per_pixel;
+ if (!image_to_draw) {
- // cerr << "Offset into image to place at zero: " << image_offset << endl;
+ /* look it up */
- context->rectangle (draw_start, draw.y0, draw_end - draw_start, draw.height());
+ bool full_image;
+ image_to_draw = get_image (sample_start, sample_end, full_image);
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 image to draw = %2 (full? %3)\n", name, image_to_draw, full_image));
+
+ if (!image_to_draw) {
+ /* image not currently available. A redraw will be scheduled
+ when it is ready.
+ */
+ return;
+ }
+
+ if (full_image) {
+ /* found an image that covers our entire sample range,
+ * so keep a reference to it.
+ */
+ _current_image = image_to_draw;
+ }
+ }
+
+ /* compute the first pixel of the image that should be used when we
+ * render the specified range.
+ */
+
+ image_origin_in_self_coordinates = (image_to_draw->start - _region_start) / _samples_per_pixel;
+
+ 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_origin_in_self_coordinates += _start_shift;
+ }
+
+ /* the image may only be a best-effort ... it may not span the entire
+ * range requested, though it is guaranteed to cover the start. So
+ * determine how many pixels we can actually draw.
+ */
+
+ double draw_width;
+
+ if (image_to_draw != _current_image) {
+ lci.release ();
+
+ /* the image is guaranteed to start at or before
+ * draw_start. But if it starts before draw_start, that reduces
+ * the maximum available width we can render with.
+ *
+ * so .. clamp the draw width to the smaller of what we need to
+ * draw or the available width of the image.
+ */
+
+ draw_width = min ((double) image_to_draw->image->get_width() - (draw_start - image_to_draw->start),
+ (draw_end - draw_start));
+
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 draw just %2 of %3 (iwidth %4 off %5 img @ %6 rs @ %7)\n", name, draw_width, (draw_end - draw_start),
+ image_to_draw->image->get_width(), image_origin_in_self_coordinates,
+ image_to_draw->start, _region_start));
+ } else {
+ draw_width = draw_end - draw_start;
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("use current image, span entire render width %1..%2\n", draw_start, draw_end));
+ }
+
+ context->rectangle (draw_start, draw.y0, draw_width, draw.height());
/* round image origin position to an exact pixel in device space to
* avoid blurring
*/
- double x = self.x0 + image_offset;
+ double x = self.x0 + image_origin_in_self_coordinates;
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);
+ /* the coordinates specify where in "user coordinates" (i.e. what we
+ * generally call "canvas coordinates" in this code) the image origin
+ * will appear. So specifying (10,10) will put the upper left corner of
+ * the image at (10,10) in user space.
+ */
+
+ context->set_source (image_to_draw->image, x, y);
context->fill ();
+
+ /* image obtained, some of it painted to display: we are rendered.
+ Future calls to get_image_in_thread are now meaningful.
+ */
+
+ rendered = true;
}
void
WaveView::compute_bounding_box () const
{
if (_region) {
- _bounding_box = Rect (0.0, 0.0, _region->length() / _samples_per_pixel, _height);
+ _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;
+ get_image_in_thread = true;
_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 ();
+ get_image_in_thread = true;
+ 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 ();
}
}
void
WaveView::set_amplitude_above_axis (double a)
{
- if (_amplitude_above_axis != a) {
+ if (fabs (_amplitude_above_axis - a) > 0.01) {
+ begin_visual_change ();
+ invalidate_image_cache ();
_amplitude_above_axis = a;
- invalidate_image ();
+ get_image_in_thread = true;
+ end_visual_change ();
}
}
{
if (_global_shape != s) {
_global_shape = s;
+ if (images) {
+ images->clear_cache ();
+ }
VisualPropertiesChanged (); /* EMIT SIGNAL */
}
}
{
if (_global_logscaled != yn) {
_global_logscaled = yn;
+ if (images) {
+ images->clear_cache ();
+ }
VisualPropertiesChanged (); /* EMIT SIGNAL */
}
}
+framecnt_t
+WaveView::region_length() const
+{
+ return _region->length() - (_region_start - _region->start());
+}
+
+framepos_t
+WaveView::region_end() const
+{
+ return _region_start + region_length();
+}
+
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 ();
}
+void
+WaveView::cancel_my_render_request () const
+{
+ if (!images) {
+ return;
+ }
+
+ /* try to stop any current rendering of the request, or prevent it from
+ * ever starting up.
+ */
+
+ if (current_request) {
+ current_request->cancel ();
+ }
+
+ Glib::Threads::Mutex::Lock lm (request_queue_lock);
+
+ /* now remove it from the queue and reset our request pointer so that
+ have no outstanding request (that we know about)
+ */
+
+ request_queue.erase (this);
+ current_request.reset ();
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 now has no request %2\n", this));
+
+}
+
+void
+WaveView::set_image_cache_size (uint64_t sz)
+{
+ if (!images) {
+ images = new WaveViewCache;
+ }
+
+ images->set_image_cache_threshold (sz);
+}
+
+/*-------------------------------------------------*/
+
+void
+WaveView::start_drawing_thread ()
+{
+ if (!_drawing_thread) {
+ _drawing_thread = Glib::Threads::Thread::create (sigc::ptr_fun (WaveView::drawing_thread));
+ }
+}
+
+void
+WaveView::stop_drawing_thread ()
+{
+ if (_drawing_thread) {
+ Glib::Threads::Mutex::Lock lm (request_queue_lock);
+ g_atomic_int_set (&drawing_thread_should_quit, 1);
+ request_cond.signal ();
+ }
+}
+
+void
+WaveView::drawing_thread ()
+{
+ using namespace Glib::Threads;
+
+ WaveView const * requestor;
+ Mutex::Lock lm (request_queue_lock);
+ bool run = true;
+
+ while (run) {
+
+ /* remember that we hold the lock at this point, no matter what */
+
+ if (g_atomic_int_get (&drawing_thread_should_quit)) {
+ break;
+ }
+
+ if (request_queue.empty()) {
+ request_cond.wait (request_queue_lock);
+ }
+
+ if (request_queue.empty()) {
+ assert (g_atomic_int_get (&drawing_thread_should_quit));
+ continue; // or break;
+ }
+
+ /* remove the request from the queue (remember: the "request"
+ * is just a pointer to a WaveView object)
+ */
+
+ requestor = *(request_queue.begin());
+ request_queue.erase (request_queue.begin());
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("start request for %1 at %2\n", requestor, g_get_monotonic_time()));
+
+ boost::shared_ptr<WaveViewThreadRequest> req = requestor->current_request;
+
+ if (!req) {
+ continue;
+ }
+
+ /* Generate an image. Unlock the request queue lock
+ * while we do this, so that other things can happen
+ * as we do rendering.
+ */
+
+ request_queue_lock.unlock (); /* some RAII would be good here */
+
+ try {
+ requestor->generate_image (req, true);
+ } catch (...) {
+ req->image.clear(); /* just in case it was set before the exception, whatever it was */
+ }
+
+ request_queue_lock.lock ();
+
+ req.reset (); /* drop/delete request as appropriate */
+ }
+
+ /* thread is vanishing */
+ _drawing_thread = 0;
+}
+
+/*-------------------------------------------------*/
+
+WaveViewCache::WaveViewCache ()
+ : image_cache_size (0)
+ , _image_cache_threshold (100 * 1048576) /* bytes */
+{
+}
+
+WaveViewCache::~WaveViewCache ()
+{
+}
+
+
+boost::shared_ptr<WaveViewCache::Entry>
+WaveViewCache::lookup_image (boost::shared_ptr<ARDOUR::AudioSource> src,
+ framepos_t start, framepos_t end,
+ int channel,
+ Coord height,
+ float amplitude,
+ Color fill_color,
+ double samples_per_pixel,
+ bool& full_coverage)
+{
+ ImageCache::iterator x;
+
+ if ((x = cache_map.find (src)) == cache_map.end ()) {
+ /* nothing in the cache for this audio source at all */
+ return boost::shared_ptr<WaveViewCache::Entry> ();
+ }
+
+ CacheLine& caches = x->second;
+ boost::shared_ptr<Entry> best_partial;
+ framecnt_t max_coverage = 0;
+
+ /* Find a suitable ImageSurface, if it exists.
+ */
+
+ for (CacheLine::iterator c = caches.begin(); c != caches.end(); ++c) {
+
+ boost::shared_ptr<Entry> e (*c);
+
+ if (channel != e->channel
+ || height != e->height
+ || amplitude != e->amplitude
+ || samples_per_pixel != e->samples_per_pixel
+ || fill_color != e->fill_color) {
+ continue;
+ }
+
+ switch (Evoral::coverage (start, end, e->start, e->end)) {
+ case Evoral::OverlapExternal: /* required range is inside image range */
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("found image spanning %1..%2 covers %3..%4\n",
+ e->start, e->end, start, end));
+ use (src, e);
+ full_coverage = true;
+ return e;
+
+ case Evoral::OverlapStart: /* required range start is covered by image range */
+ if ((e->end - start) > max_coverage) {
+ best_partial = e;
+ max_coverage = e->end - start;
+ }
+ break;
+
+ case Evoral::OverlapNone:
+ case Evoral::OverlapEnd:
+ case Evoral::OverlapInternal:
+ break;
+ }
+ }
+
+ if (best_partial) {
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("found PARTIAL image spanning %1..%2 partially covers %3..%4\n",
+ best_partial->start, best_partial->end, start, end));
+ use (src, best_partial);
+ full_coverage = false;
+ return best_partial;
+ }
+
+ return boost::shared_ptr<Entry> ();
+}
+
+void
+WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> src,
+ int channel,
+ Coord height,
+ float amplitude,
+ Color fill_color,
+ double samples_per_pixel)
+{
+ list <uint32_t> deletion_list;
+ uint32_t other_entries = 0;
+ ImageCache::iterator x;
+
+ /* MUST BE CALLED FROM (SINGLE) GUI THREAD */
+
+ if ((x = cache_map.find (src)) == cache_map.end ()) {
+ return;
+ }
+
+ CacheLine& caches = x->second;
+
+ for (CacheLine::iterator c1 = caches.begin(); c1 != caches.end(); ) {
+
+ CacheLine::iterator nxt = c1;
+ ++nxt;
+
+ boost::shared_ptr<Entry> e1 (*c1);
+
+ if (channel != e1->channel
+ || height != e1->height
+ || amplitude != e1->amplitude
+ || samples_per_pixel != e1->samples_per_pixel
+ || fill_color != e1->fill_color) {
+
+ /* doesn't match current properties, ignore and move on
+ * to the next one.
+ */
+
+ other_entries++;
+ c1 = nxt;
+ continue;
+ }
+
+ /* c1 now points to a cached image entry that matches current
+ * properties. Check all subsequent cached imaged entries to
+ * see if there are others that also match but represent
+ * subsets of the range covered by this one.
+ */
+
+ for (CacheLine::iterator c2 = c1; c2 != caches.end(); ) {
+
+ CacheLine::iterator nxt2 = c2;
+ ++nxt2;
+
+ boost::shared_ptr<Entry> e2 (*c2);
+
+ if (e1 == e2 || channel != e2->channel
+ || height != e2->height
+ || amplitude != e2->amplitude
+ || samples_per_pixel != e2->samples_per_pixel
+ || fill_color != e2->fill_color) {
+
+ /* properties do not match, ignore for the
+ * purposes of consolidation.
+ */
+ c2 = nxt2;
+ continue;
+ }
+
+ if (e2->start >= e1->start && e2->end <= e1->end) {
+ /* c2 is fully contained by c1, so delete it */
+ caches.erase (c2);
+
+ /* and re-start the whole iteration */
+ nxt = caches.begin ();
+ break;
+ }
+
+ c2 = nxt2;
+ }
+
+ c1 = nxt;
+ }
+}
+
+void
+WaveViewCache::use (boost::shared_ptr<ARDOUR::AudioSource> src, boost::shared_ptr<Entry> ce)
+{
+ ce->timestamp = g_get_monotonic_time ();
+}
+
+void
+WaveViewCache::add (boost::shared_ptr<ARDOUR::AudioSource> src, boost::shared_ptr<Entry> ce)
+{
+ /* MUST BE CALLED FROM (SINGLE) GUI THREAD */
+
+ Cairo::RefPtr<Cairo::ImageSurface> img (ce->image);
+
+ image_cache_size += img->get_height() * img->get_width () * 4; /* 4 = bytes per FORMAT_ARGB32 pixel */
+
+ if (cache_full()) {
+ cache_flush ();
+ }
+
+ ce->timestamp = g_get_monotonic_time ();
+
+ cache_map[src].push_back (ce);
+}
+
+uint64_t
+WaveViewCache::compute_image_cache_size()
+{
+ uint64_t total = 0;
+ for (ImageCache::iterator s = cache_map.begin(); s != cache_map.end(); ++s) {
+ CacheLine& per_source_cache (s->second);
+ for (CacheLine::iterator c = per_source_cache.begin(); c != per_source_cache.end(); ++c) {
+ Cairo::RefPtr<Cairo::ImageSurface> img ((*c)->image);
+ total += img->get_height() * img->get_width() * 4; /* 4 = bytes per FORMAT_ARGB32 pixel */
+ }
+ }
+ return total;
+}
+
+bool
+WaveViewCache::cache_full()
+{
+ return image_cache_size > _image_cache_threshold;
+}
+
+void
+WaveViewCache::cache_flush ()
+{
+ /* Build a sortable list of all cache entries */
+
+ CacheList cache_list;
+
+ for (ImageCache::const_iterator cm = cache_map.begin(); cm != cache_map.end(); ++cm) {
+ for (CacheLine::const_iterator cl = cm->second.begin(); cl != cm->second.end(); ++cl) {
+ cache_list.push_back (make_pair (cm->first, *cl));
+ }
+ }
+
+ /* sort list in LRU order */
+ SortByTimestamp sorter;
+ sort (cache_list.begin(), cache_list.end(), sorter);
+
+ while (image_cache_size > _image_cache_threshold && !cache_map.empty() && !cache_list.empty()) {
+
+ ListEntry& le (cache_list.front());
+
+ ImageCache::iterator x;
+
+ if ((x = cache_map.find (le.first)) != cache_map.end ()) {
+
+ CacheLine& cl = x->second;
+
+ for (CacheLine::iterator c = cl.begin(); c != cl.end(); ++c) {
+
+ if (*c == le.second) {
+
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("Removing cache line entry for %1\n", x->first->name()));
+
+ /* Remove this entry from this cache line */
+ cl.erase (c);
+
+ if (cl.empty()) {
+ /* remove cache line from main cache: no more entries */
+ cache_map.erase (x);
+ }
+
+ break;
+ }
+ }
+
+ Cairo::RefPtr<Cairo::ImageSurface> img (le.second->image);
+ uint64_t size = img->get_height() * img->get_width() * 4; /* 4 = bytes per FORMAT_ARGB32 pixel */
+
+ if (image_cache_size > size) {
+ image_cache_size -= size;
+ } else {
+ image_cache_size = 0;
+ }
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("cache shrunk to %1\n", image_cache_size));
+ }
+
+ /* Remove from the linear list, even if we didn't find it in
+ * the actual cache_mao
+ */
+ cache_list.erase (cache_list.begin());
+ }
+}
+
+void
+WaveViewCache::clear_cache ()
+{
+ DEBUG_TRACE (DEBUG::WaveView, "clear cache\n");
+ const uint64_t image_cache_threshold = _image_cache_threshold;
+ _image_cache_threshold = 0;
+ cache_flush ();
+ _image_cache_threshold = image_cache_threshold;
+}
+
+void
+WaveViewCache::set_image_cache_threshold (uint64_t sz)
+{
+ DEBUG_TRACE (DEBUG::WaveView, string_compose ("new image cache size %1\n", sz));
+ _image_cache_threshold = sz;
+ cache_flush ();
+}
projects / ardour.git / blobdiff