353 lines
8.9 KiB
C++
353 lines
8.9 KiB
C++
/*
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* Copyright (C) 2017 Tim Mayberry <mojofunk@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _WAVEVIEW_WAVE_VIEW_PRIVATE_H_
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#define _WAVEVIEW_WAVE_VIEW_PRIVATE_H_
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#include <deque>
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#include "waveview/wave_view.h"
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namespace ARDOUR {
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class AudioRegion;
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}
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namespace ArdourWaveView {
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struct WaveViewProperties
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{
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public: // ctors
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WaveViewProperties (boost::shared_ptr<ARDOUR::AudioRegion> region);
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// WaveViewProperties (WaveViewProperties const& other) = default;
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// WaveViewProperties& operator=(WaveViewProperties const& other) = default;
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public: // member variables
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samplepos_t region_start;
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samplepos_t region_end;
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uint16_t channel;
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double height;
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double samples_per_pixel;
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double amplitude;
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double amplitude_above_axis;
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Gtkmm2ext::Color fill_color;
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Gtkmm2ext::Color outline_color;
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Gtkmm2ext::Color zero_color;
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Gtkmm2ext::Color clip_color;
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bool show_zero;
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bool logscaled;
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WaveView::Shape shape;
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double gradient_depth;
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double start_shift;
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private: // member variables
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samplepos_t sample_start;
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samplepos_t sample_end;
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public: // methods
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bool is_valid () const
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{
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return (sample_end != 0 && samples_per_pixel != 0);
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}
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void set_width_samples (ARDOUR::samplecnt_t const width_samples)
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{
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assert (is_valid());
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assert (width_samples != 0);
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ARDOUR::samplecnt_t half_width = width_samples / 2;
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samplepos_t new_sample_start = std::max (region_start, get_center_sample () - half_width);
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samplepos_t new_sample_end = std::min (get_center_sample () + half_width, region_end);
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assert (new_sample_start <= new_sample_end);
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sample_start = new_sample_start;
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sample_end = new_sample_end;
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}
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uint64_t get_width_pixels () const
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{
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return (uint64_t)std::max (1LL, llrint (ceil (get_length_samples () / samples_per_pixel)));
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}
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void set_sample_offsets (samplepos_t const start, samplepos_t const end)
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{
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assert (start <= end);
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// sample_start and sample_end are bounded by the region limits.
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if (start < region_start) {
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sample_start = region_start;
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} else if (start > region_end) {
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sample_start = region_end;
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} else {
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sample_start = start;
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}
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if (end > region_end) {
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sample_end = region_end;
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} else if (end < region_start) {
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sample_end = region_start;
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} else {
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sample_end = end;
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}
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assert (sample_start <= sample_end);
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}
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samplepos_t get_sample_start () const
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{
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return sample_start;
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}
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samplepos_t get_sample_end () const
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{
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return sample_end;
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}
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void set_sample_positions_from_pixel_offsets (double start_pixel, double end_pixel)
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{
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assert (start_pixel <= end_pixel);
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/**
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* It is possible for the new sample positions to be past the region_end,
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* so we have to do bounds checking/adjustment for this in set_sample_offsets.
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*/
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samplepos_t new_sample_start = region_start + (start_pixel * samples_per_pixel);
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samplepos_t new_sample_end = region_start + (end_pixel * samples_per_pixel);
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set_sample_offsets (new_sample_start, new_sample_end);
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}
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ARDOUR::samplecnt_t get_length_samples () const
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{
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assert (sample_start <= sample_end);
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return sample_end - sample_start;
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}
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samplepos_t get_center_sample () const
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{
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return sample_start + (get_length_samples() / 2);
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}
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bool is_equivalent (WaveViewProperties const& other)
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{
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return (samples_per_pixel == other.samples_per_pixel &&
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contains (other.sample_start, other.sample_end) && channel == other.channel &&
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height == other.height && amplitude == other.amplitude &&
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amplitude_above_axis == other.amplitude_above_axis && fill_color == other.fill_color &&
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outline_color == other.outline_color && zero_color == other.zero_color &&
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clip_color == other.clip_color && show_zero == other.show_zero &&
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logscaled == other.logscaled && shape == other.shape &&
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gradient_depth == other.gradient_depth);
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// region_start && start_shift??
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}
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bool contains (samplepos_t start, samplepos_t end)
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{
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return (sample_start <= start && end <= sample_end);
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}
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};
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struct WaveViewImage {
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public: // ctors
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WaveViewImage (boost::shared_ptr<const ARDOUR::AudioRegion> const& region_ptr,
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WaveViewProperties const& properties);
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~WaveViewImage ();
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public: // member variables
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boost::weak_ptr<const ARDOUR::AudioRegion> region;
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WaveViewProperties props;
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Cairo::RefPtr<Cairo::ImageSurface> cairo_image;
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uint64_t timestamp;
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public: // methods
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bool finished() { return static_cast<bool>(cairo_image); }
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bool
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contains_image_with_properties (WaveViewProperties const& other_props)
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{
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return cairo_image && props.is_equivalent (other_props);
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}
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bool is_valid () {
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return props.is_valid ();
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}
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size_t size_in_bytes ()
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{
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// 4 = bytes per FORMAT_ARGB32 pixel
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return props.height * props.get_width_pixels() * 4;
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}
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};
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struct WaveViewDrawRequest
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{
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public:
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WaveViewDrawRequest ();
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~WaveViewDrawRequest ();
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bool stopped() const { return (bool) g_atomic_int_get (&_stop); }
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void cancel() { g_atomic_int_set (&_stop, 1); }
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bool finished() { return image->finished(); }
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boost::shared_ptr<WaveViewImage> image;
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bool is_valid () {
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return (image && image->is_valid());
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}
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private:
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GATOMIC_QUAL gint _stop; /* intended for atomic access */
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};
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class WaveViewCache;
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class WaveViewCacheGroup
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{
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public:
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WaveViewCacheGroup (WaveViewCache& parent_cache);
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~WaveViewCacheGroup ();
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public:
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// @return image with matching properties or null
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boost::shared_ptr<WaveViewImage> lookup_image (WaveViewProperties const&);
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void add_image (boost::shared_ptr<WaveViewImage>);
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bool full () const { return _cached_images.size() > max_size(); }
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static uint32_t max_size () { return 16; }
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void clear_cache ();
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private:
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/**
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* At time of writing we don't strictly need a reference to the parent cache
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* as there is only a single global cache but if the image cache ever becomes
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* a per canvas cache then a using a reference is handy.
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*/
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WaveViewCache& _parent_cache;
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typedef std::list<boost::shared_ptr<WaveViewImage> > ImageCache;
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ImageCache _cached_images;
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};
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class WaveViewCache
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{
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public:
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static WaveViewCache* get_instance ();
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uint64_t image_cache_threshold () const { return _image_cache_threshold; }
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void set_image_cache_threshold (uint64_t);
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void clear_cache ();
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boost::shared_ptr<WaveViewCacheGroup> get_cache_group (boost::shared_ptr<ARDOUR::AudioSource>);
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void reset_cache_group (boost::shared_ptr<WaveViewCacheGroup>&);
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private:
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WaveViewCache();
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~WaveViewCache();
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private:
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typedef std::map<boost::shared_ptr<ARDOUR::AudioSource>, boost::shared_ptr<WaveViewCacheGroup> >
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CacheGroups;
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CacheGroups cache_group_map;
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uint64_t image_cache_size;
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uint64_t _image_cache_threshold;
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private:
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friend class WaveViewCacheGroup;
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void increase_size (uint64_t bytes);
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void decrease_size (uint64_t bytes);
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bool full () { return image_cache_size > _image_cache_threshold; }
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};
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class WaveViewDrawingThread
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{
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public:
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WaveViewDrawingThread ();
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~WaveViewDrawingThread ();
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private:
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void start ();
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void run ();
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private:
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Glib::Threads::Thread* _thread;
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};
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class WaveViewThreads {
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private:
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WaveViewThreads ();
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~WaveViewThreads ();
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public:
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static void initialize ();
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static void deinitialize ();
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static bool enabled () { return (instance); }
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static void enqueue_draw_request (boost::shared_ptr<WaveViewDrawRequest>&);
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private:
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friend class WaveViewDrawingThread;
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// will block until a request is available
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static boost::shared_ptr<WaveViewDrawRequest> dequeue_draw_request ();
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static void thread_proc ();
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boost::shared_ptr<WaveViewDrawRequest> _dequeue_draw_request ();
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void _enqueue_draw_request (boost::shared_ptr<WaveViewDrawRequest>&);
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void _thread_proc ();
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void start_threads ();
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void stop_threads ();
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private:
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static uint32_t init_count;
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static WaveViewThreads* instance;
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// TODO use std::unique_ptr when possible
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typedef std::vector<boost::shared_ptr<WaveViewDrawingThread> > WaveViewThreadList;
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bool _quit;
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WaveViewThreadList _threads;
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mutable Glib::Threads::Mutex _queue_mutex;
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Glib::Threads::Cond _cond;
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typedef std::deque<boost::shared_ptr<WaveViewDrawRequest> > DrawRequestQueueType;
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DrawRequestQueueType _queue;
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};
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} /* namespace */
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#endif
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