#include "canvas/wave_view.h"
#include "canvas/utils.h"
#include "canvas/canvas.h"
+#include "canvas/colors.h"
#include <gdkmm/general.h>
, _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));
_gradient_depth = global_gradient_depth();
changed = true;
}
-
+
if (changed) {
begin_visual_change ();
invalidate_image_cache ();
invalidate_image_cache ();
_samples_per_pixel = samples_per_pixel;
_bounding_box_dirty = true;
-
+
end_change ();
}
}
-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)
{
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 {
for (uint32_t i = 0; i < caches.size (); ++i) {
- if (_channel != caches[i].channel
+ if (_channel != caches[i].channel
|| _height != caches[i].height
- || _region_amplitude != caches[i].amplitude
+ || _region_amplitude != caches[i].amplitude
|| _fill_color != caches[i].fill_color) {
continue;
}
deletion_list.push_back (i);
-
}
while (deletion_list.size() > 0) {
} else {
_image_cache[_region->audio_source ()] = caches;
}
-
}
void
for (uint32_t i = 0; i < caches.size (); ++i) {
- if (_channel != caches[i].channel
+ if (_channel != caches[i].channel
|| _height != caches[i].height
|| _region_amplitude != caches[i].amplitude
|| _fill_color != caches[i].fill_color) {
for (uint32_t j = i; j < caches.size (); ++j) {
- if (i == j || _channel != caches[j].channel
- || _height != caches[i].height
+ if (i == j || _channel != caches[j].channel
+ || _height != caches[i].height
|| _region_amplitude != caches[i].amplitude
|| _fill_color != caches[i].fill_color) {
deletion_list.pop_back();
}
- /* We don't care if this channel/height/amplitude has anything in the cache - just drop the Last Added entries
+ /* 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.
*/
}
Coord
-WaveView::y_extent (double s, bool round_to_lower_edge) const
+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.
+ /* 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
*/
-
- Coord pos;
-
- switch (_shape) {
- case Rectified:
- if (round_to_lower_edge) {
- pos = ceil (_height - (s * _height));
- } else {
- pos = floor (_height - (s * _height));
- }
- break;
- default:
- if (round_to_lower_edge) {
- pos = ceil ((1.0-s) * (_height/2.0));
+ 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) * (_height/2.0));
+ pos = floor ((1.0 - s) * .5 * (_height - 4.0));
}
- break;
+ 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();
- return min (_height, (max (0.0, pos)));
+ 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 spread;
bool clip_max;
bool clip_min;
-
+
LineTips() : top (0.0), bot (0.0), clip_max (false), clip_min (false) {}
};
Cairo::RefPtr<Cairo::ImageSurface> clip;
Cairo::RefPtr<Cairo::ImageSurface> zero;
- ImageSet() :
- wave (0), outline (0), clip (0), zero (0) {}
+ ImageSet() :
+ wave (0), outline (0), clip (0), zero (0) {}
};
void
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]);
if (_logscaled) {
for (int i = 0; i < n_peaks; ++i) {
- tips[i].bot = height();
+ 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 = (1.0 - p) * _height;
+ tips[i].spread = p * (_height - 1.0);
- 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;
}
}
- } else {for (int i = 0; i < n_peaks; ++i) {
-
- tips[i].bot = height();
- tips[i].top = y_extent (max (fabs (_peaks[i].max), fabs (_peaks[i].min)), true);
- tips[i].spread = (1.0 - fabs(_peaks[i].max - _peaks[i].min)) * _height;
+ } else {
+ for (int i = 0; i < n_peaks; ++i) {
- if (fabs (_peaks[i].max) >= clip_level) {
+ 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;
}
-
- if (fabs (_peaks[i].min) >= clip_level) {
- tips[i].clip_min = true;
- }
}
+
}
} else {
if (_logscaled) {
for (int i = 0; i < n_peaks; ++i) {
- double top = _peaks[i].min;
- double 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 (top) >= clip_level) {
+ if (-(_peaks[i].min) >= clip_level) {
tips[i].clip_min = true;
}
tips[i].top = y_extent (top, false);
tips[i].bot = y_extent (bot, true);
- tips[i].spread = fabs (tips[i].top - tips[i].bot);
- }
+ 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 = y_extent (_peaks[i].min, false);
- tips[i].bot = y_extent (_peaks[i].max, true);
- tips[i].spread = fabs (tips[i].top - tips[i].bot);
+ 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 (zero_context, alpha_one);
/* ensure single-pixel lines */
-
+
wave_context->set_line_width (1.0);
- wave_context->translate (0.5, 0.0);
+ wave_context->translate (0.5, +0.5);
outline_context->set_line_width (1.0);
- outline_context->translate (0.5, 0.0);
+ outline_context->translate (0.5, +0.5);
clip_context->set_line_width (1.0);
- clip_context->translate (0.5, 0.0);
+ clip_context->translate (0.5, +0.5);
zero_context->set_line_width (1.0);
- zero_context->translate (0.5, 0.0);
+ 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
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.
+
+ 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
/* waveform line */
- if (tips[i].spread >= 2.0) {
+ 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 || tips[i].clip_min)) {
+ 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, floor (tips[i].spread)));
+ 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);
+ outline_context->close_path ();
}
}
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 >= 3.0) {
+ 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 < tips[i].bot) {
+ if (tips[i-1].top + 2 < tips[i].top) {
wave_context->move_to (i-1, tips[i-1].top);
- wave_context->line_to (i, tips[i].bot);
- }
- else if (tips[i-1].bot > tips[i].top) {
- wave_context->move_to (i-1, tips[i-1].bot);
+ 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, _height/2.0);
- zero_context->rel_line_to (0, 0.5);
- }
-
- /* 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 */
- clip_context->rel_line_to (0, min (clip_height, floor (tips[i].spread)));
- } else {
- outline_context->move_to (i, tips[i].top);
- /* normal upper terminal dot */
- outline_context->rel_line_to (0, 1.0);
+ zero_context->move_to (i, floor(height_2));
+ zero_context->rel_line_to (1.0, 0);
}
- if (tips[i].spread >= 2.0) {
-
+ 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 */
- clip_context->rel_line_to (0, -(min (clip_height, floor (tips[i].spread))));
+ 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);
+ outline_context->move_to (i, tips[i].bot + 0.5);
/* normal lower terminal dot */
- outline_context->rel_line_to (0, -1.0);
+ 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);
}
}
}
/* 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) {
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[0], r, g, b, a);
gradient->add_color_stop_rgba (stops[2], r, g, b, a);
}
context->mask (images.wave, 0, 0);
- context->fill ();
+ context->fill ();
set_source_rgba (context, _outline_color);
context->mask (images.outline, 0, 0);
vector <CacheEntry> caches;
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
+ if (_channel != caches[i].channel
|| _height != caches[i].height
|| _region_amplitude != caches[i].amplitude
|| _fill_color != caches[i].fill_color) {
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 = _canvas->visible_area().width() * _samples_per_pixel; /* one canvas width */
boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
- _region->read_peaks (peaks.get(), n_peaks,
+ framecnt_t peaks_read;
+ peaks_read = _region->read_peaks (peaks.get(), n_peaks,
sample_start, sample_end - sample_start,
- _channel,
+ _channel,
_samples_per_pixel);
image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
- draw_image (image, peaks.get(), n_peaks);
+ 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));
return;
}
- Rect self = item_to_window (Rect (0.5, 0.0, _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 down in case we were asked to
* draw "between" pixels at the start and/or end.
*/
-
- const double draw_start = floor (draw.x0);
+
+ 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;
Cairo::RefPtr<Cairo::ImageSurface> image;
// 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
} else {
_bounding_box = boost::optional<Rect> ();
}
-
+
_bounding_box_dirty = false;
}
-
+
void
WaveView::set_height (Distance height)
{
{
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