diff options
Diffstat (limited to 'libs/canvas/wave_view.cc')
| -rw-r--r-- | libs/canvas/wave_view.cc | 154 |
1 files changed, 77 insertions, 77 deletions
diff --git a/libs/canvas/wave_view.cc b/libs/canvas/wave_view.cc index 7f0aed6dff..fce30e7f38 100644 --- a/libs/canvas/wave_view.cc +++ b/libs/canvas/wave_view.cc @@ -274,7 +274,7 @@ 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 @@ -317,11 +317,11 @@ WaveView::compute_tips (PeakData const & peak, WaveView::LineTips& tips) const 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 @@ -474,7 +474,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak } else { p.min = 0.0; } - + compute_tips (p, tips[i]); tips[i].spread = tips[i].bot - tips[i].top; } @@ -498,7 +498,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak if (req->should_stop()) { return; } - + Color alpha_one = rgba_to_color (0, 0, 0, 1.0); set_source_rgba (wave_context, alpha_one); @@ -590,7 +590,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak 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) { @@ -678,7 +678,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak 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. */ @@ -722,7 +722,7 @@ WaveView::draw_image (Cairo::RefPtr<Cairo::ImageSurface>& image, PeakData* _peak if (req->should_stop()) { return; } - + context->mask (images.wave, 0, 0); context->fill (); @@ -756,11 +756,11 @@ WaveView::cache_request_result (boost::shared_ptr<WaveViewThreadRequest> req) co 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); @@ -774,14 +774,14 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const boost::shared_ptr<WaveViewCache::Entry> ret; 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); @@ -793,7 +793,7 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const 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 @@ -801,7 +801,7 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const */ if (current_request->start <= start && current_request->end >= end) { - + ret.reset (new WaveViewCache::Entry (current_request->channel, current_request->height, current_request->amplitude, @@ -810,7 +810,7 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const 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)); @@ -824,21 +824,21 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const 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) { 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; @@ -853,7 +853,7 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const req->width = desired_image_width (); /* draw image in this (the GUI thread) */ - + generate_image (req, false); /* cache the result */ @@ -863,7 +863,7 @@ WaveView::get_image (framepos_t start, framepos_t end, bool& full_image) const /* reset this so that future missing images are * generated in a a worker thread. */ - + get_image_in_thread = false; } else { @@ -963,34 +963,34 @@ WaveView::generate_image (boost::shared_ptr<WaveViewThreadRequest> req, bool in_ * 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 @@ -998,7 +998,7 @@ WaveView::generate_image (boost::shared_ptr<WaveViewThreadRequest> req, bool in_ * 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; @@ -1012,8 +1012,8 @@ WaveView::generate_image (boost::shared_ptr<WaveViewThreadRequest> req, bool in_ } } 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 */ @@ -1040,7 +1040,7 @@ void WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const { assert (_samples_per_pixel != 0); - + if (!_region) { return; } @@ -1064,11 +1064,11 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons * 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); @@ -1082,17 +1082,17 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons /* "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 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); // 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 begins N pixels after the start of region that this waveview is @@ -1101,18 +1101,18 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons 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_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; /* sample_start and sample_end are bounded by the region @@ -1121,17 +1121,17 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons */ 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; 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) { /* 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 (); @@ -1150,7 +1150,7 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons 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. @@ -1171,7 +1171,7 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons */ 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 @@ -1181,14 +1181,14 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons //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 (); @@ -1230,7 +1230,7 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons * 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 (); @@ -1262,7 +1262,7 @@ WaveView::set_height (Distance height) invalidate_image_cache (); _height = height; get_image_in_thread = true; - + _bounding_box_dirty = true; end_change (); } @@ -1468,17 +1468,17 @@ WaveView::cancel_my_render_request () const /* 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)); @@ -1527,7 +1527,7 @@ WaveView::drawing_thread () while (run) { /* remember that we hold the lock at this point, no matter what */ - + if (g_atomic_int_get (&drawing_thread_should_quit)) { break; } @@ -1544,7 +1544,7 @@ WaveView::drawing_thread () /* 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()); @@ -1602,7 +1602,7 @@ WaveViewCache::lookup_image (boost::shared_ptr<ARDOUR::AudioSource> src, 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> (); @@ -1611,14 +1611,14 @@ WaveViewCache::lookup_image (boost::shared_ptr<ARDOUR::AudioSource> src, 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 @@ -1673,7 +1673,7 @@ WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> s ImageCache::iterator x; /* MUST BE CALLED FROM (SINGLE) GUI THREAD */ - + if ((x = cache_map.find (src)) == cache_map.end ()) { return; } @@ -1686,7 +1686,7 @@ WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> s ++nxt; boost::shared_ptr<Entry> e1 (*c1); - + if (channel != e1->channel || height != e1->height || amplitude != e1->amplitude @@ -1696,12 +1696,12 @@ WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> s /* 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 @@ -1714,7 +1714,7 @@ WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> s ++nxt2; boost::shared_ptr<Entry> e2 (*c2); - + if (e1 == e2 || channel != e2->channel || height != e2->height || amplitude != e2->amplitude @@ -1727,7 +1727,7 @@ WaveViewCache::consolidate_image_cache (boost::shared_ptr<ARDOUR::AudioSource> s c2 = nxt2; continue; } - + if (e2->start >= e1->start && e2->end <= e1->end) { /* c2 is fully contained by c1, so delete it */ caches.erase (c2); @@ -1754,7 +1754,7 @@ 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 */ @@ -1792,7 +1792,7 @@ 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) { @@ -1800,7 +1800,7 @@ WaveViewCache::cache_flush () cache_list.push_back (make_pair (cm->first, *cl)); } } - + /* sort list in LRU order */ SortByTimestamp sorter; sort (cache_list.begin(), cache_list.end(), sorter); @@ -1810,32 +1810,32 @@ WaveViewCache::cache_flush () 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 { |