+++ /dev/null
-/*
- Copyright (C) 2017 Tim Mayberry
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-*/
-
-#ifndef __CANVAS_WAVE_VIEW_PRIVATE_H__
-#define __CANVAS_WAVE_VIEW_PRIVATE_H__
-
-#include <deque>
-
-#include "canvas/wave_view.h"
-
-namespace ARDOUR {
- class AudioRegion;
-}
-
-namespace ArdourCanvas {
-
-struct WaveViewProperties
-{
-public: // ctors
- WaveViewProperties (boost::shared_ptr<ARDOUR::AudioRegion> region);
-
- // WaveViewProperties (WaveViewProperties const& other) = default;
-
- // WaveViewProperties& operator=(WaveViewProperties const& other) = default;
-
-public: // member variables
-
- framepos_t region_start;
- framepos_t region_end;
- uint16_t channel;
- double height;
- double samples_per_pixel;
- double amplitude;
- double amplitude_above_axis;
- Gtkmm2ext::Color fill_color;
- Gtkmm2ext::Color outline_color;
- Gtkmm2ext::Color zero_color;
- Gtkmm2ext::Color clip_color;
- bool show_zero;
- bool logscaled;
- WaveView::Shape shape;
- double gradient_depth;
- double start_shift;
-
-private: // member variables
-
- framepos_t sample_start;
- framepos_t sample_end;
-
-public: // methods
-
- bool is_valid () const
- {
- return (sample_end != 0 && samples_per_pixel != 0);
- }
-
- void set_width_samples (ARDOUR::framecnt_t const width_samples)
- {
- assert (is_valid());
- assert (width_samples != 0);
- ARDOUR::framecnt_t half_width = width_samples / 2;
- framepos_t new_sample_start = std::max (region_start, get_center_sample () - half_width);
- framepos_t new_sample_end = std::min (get_center_sample () + half_width, region_end);
- assert (new_sample_start <= new_sample_end);
- sample_start = new_sample_start;
- sample_end = new_sample_end;
- }
-
- uint64_t get_width_pixels () const
- {
- return (uint64_t)std::max (1LL, llrint (ceil (get_length_samples () / samples_per_pixel)));
- }
-
-
- void set_sample_offsets (framepos_t const start, framepos_t const end)
- {
- assert (start <= end);
-
- // sample_start and sample_end are bounded by the region limits.
- if (start < region_start) {
- sample_start = region_start;
- } else if (start > region_end) {
- sample_start = region_end;
- } else {
- sample_start = start;
- }
-
- if (end > region_end) {
- sample_end = region_end;
- } else if (end < region_start) {
- sample_end = region_start;
- } else {
- sample_end = end;
- }
-
- assert (sample_start <= sample_end);
- }
-
- framepos_t get_sample_start () const
- {
- return sample_start;
- }
-
- framepos_t get_sample_end () const
- {
- return sample_end;
- }
-
- void set_sample_positions_from_pixel_offsets (double start_pixel, double end_pixel)
- {
- assert (start_pixel <= end_pixel);
- /**
- * It is possible for the new sample positions to be past the region_end,
- * so we have to do bounds checking/adjustment for this in set_sample_offsets.
- */
- framepos_t new_sample_start = region_start + (start_pixel * samples_per_pixel);
- framepos_t new_sample_end = region_start + (end_pixel * samples_per_pixel);
- set_sample_offsets (new_sample_start, new_sample_end);
- }
-
- ARDOUR::framecnt_t get_length_samples () const
- {
- assert (sample_start <= sample_end);
- return sample_end - sample_start;
- }
-
- framepos_t get_center_sample ()
- {
- return sample_start + (get_length_samples() / 2);
- }
-
- bool is_equivalent (WaveViewProperties const& other)
- {
- return (samples_per_pixel == other.samples_per_pixel &&
- contains (other.sample_start, other.sample_end) && channel == other.channel &&
- height == other.height && amplitude == other.amplitude &&
- amplitude_above_axis == other.amplitude_above_axis && fill_color == other.fill_color &&
- outline_color == other.outline_color && zero_color == other.zero_color &&
- clip_color == other.clip_color && show_zero == other.show_zero &&
- logscaled == other.logscaled && shape == other.shape &&
- gradient_depth == other.gradient_depth);
- // region_start && start_shift??
- }
-
- bool contains (framepos_t start, framepos_t end)
- {
- return (sample_start <= start && end <= sample_end);
- }
-};
-
-struct WaveViewImage {
-public: // ctors
- WaveViewImage (boost::shared_ptr<const ARDOUR::AudioRegion> const& region_ptr,
- WaveViewProperties const& properties);
-
- ~WaveViewImage ();
-
-public: // member variables
- boost::weak_ptr<const ARDOUR::AudioRegion> region;
- WaveViewProperties props;
- Cairo::RefPtr<Cairo::ImageSurface> cairo_image;
- uint64_t timestamp;
-
-public: // methods
- bool finished() { return static_cast<bool>(cairo_image); }
-
- bool
- contains_image_with_properties (WaveViewProperties const& other_props)
- {
- return cairo_image && props.is_equivalent (other_props);
- }
-
- bool is_valid () {
- return props.is_valid ();
- }
-
- size_t size_in_bytes ()
- {
- // 4 = bytes per FORMAT_ARGB32 pixel
- return props.height * props.get_width_pixels() * 4;
- }
-};
-
-struct WaveViewDrawRequest
-{
-public:
- WaveViewDrawRequest ();
- ~WaveViewDrawRequest ();
-
- bool stopped() const { return (bool) g_atomic_int_get (const_cast<gint*>(&stop)); }
- void cancel() { g_atomic_int_set (&stop, 1); }
- bool finished() { return image->finished(); }
-
- boost::shared_ptr<WaveViewImage> image;
-
- bool is_valid () {
- return (image && image->is_valid());
- }
-
-private:
- gint stop; /* intended for atomic access */
-};
-
-class WaveViewCache;
-
-class WaveViewCacheGroup
-{
-public:
- WaveViewCacheGroup (WaveViewCache& parent_cache);
-
- ~WaveViewCacheGroup ();
-
-public:
-
- // @return image with matching properties or null
- boost::shared_ptr<WaveViewImage> lookup_image (WaveViewProperties const&);
-
- void add_image (boost::shared_ptr<WaveViewImage>);
-
- bool full () const { return _cached_images.size() > max_size(); }
-
- static uint32_t max_size () { return 16; }
-
- void clear_cache ();
-
-private:
-
- /**
- * At time of writing we don't strictly need a reference to the parent cache
- * as there is only a single global cache but if the image cache ever becomes
- * a per canvas cache then a using a reference is handy.
- */
- WaveViewCache& _parent_cache;
-
- typedef std::list<boost::shared_ptr<WaveViewImage> > ImageCache;
- ImageCache _cached_images;
-};
-
-class WaveViewCache
-{
-public:
- static WaveViewCache* get_instance ();
-
- uint64_t image_cache_threshold () const { return _image_cache_threshold; }
- void set_image_cache_threshold (uint64_t);
-
- void clear_cache ();
-
- boost::shared_ptr<WaveViewCacheGroup> get_cache_group (boost::shared_ptr<ARDOUR::AudioSource>);
-
- void reset_cache_group (boost::shared_ptr<WaveViewCacheGroup>&);
-
-private:
- WaveViewCache();
- ~WaveViewCache();
-
-private:
- typedef std::map<boost::shared_ptr<ARDOUR::AudioSource>, boost::shared_ptr<WaveViewCacheGroup> >
- CacheGroups;
-
- CacheGroups cache_group_map;
-
- uint64_t image_cache_size;
- uint64_t _image_cache_threshold;
-
-private:
- friend class WaveViewCacheGroup;
-
- void increase_size (uint64_t bytes);
- void decrease_size (uint64_t bytes);
-
- bool full () { return image_cache_size > _image_cache_threshold; }
-};
-
-class WaveViewDrawRequestQueue
-{
-public:
-
- void enqueue (boost::shared_ptr<WaveViewDrawRequest>&);
-
- // @return valid request or null if non-blocking or no request is available
- boost::shared_ptr<WaveViewDrawRequest> dequeue (bool block);
-
- void wake_up ();
-
-private:
-
- mutable Glib::Threads::Mutex _queue_mutex;
- Glib::Threads::Cond _cond;
-
- typedef std::deque<boost::shared_ptr<WaveViewDrawRequest> > DrawRequestQueueType;
- DrawRequestQueueType _queue;
-};
-
-class WaveViewDrawingThread
-{
-public:
- WaveViewDrawingThread ();
- ~WaveViewDrawingThread ();
-
-private:
- void start ();
- void quit ();
- void run ();
-
-private:
- Glib::Threads::Thread* _thread;
- gint _quit;
-};
-
-class WaveViewThreads {
-private:
- WaveViewThreads ();
- ~WaveViewThreads ();
-
-public:
- static void initialize ();
- static void deinitialize ();
-
- static bool enabled () { return (instance); }
-
- static void enqueue_draw_request (boost::shared_ptr<WaveViewDrawRequest>&);
-
-private:
- friend class WaveViewDrawingThread;
-
- static void wake_up ();
-
- // will block until a request is available
- static boost::shared_ptr<WaveViewDrawRequest> dequeue_draw_request ();
-
- void start_threads ();
- void stop_threads ();
-
-private:
- static uint32_t init_count;
- static WaveViewThreads* instance;
-
- // TODO use std::unique_ptr when possible
- typedef std::vector<boost::shared_ptr<WaveViewDrawingThread> > WaveViewThreadList;
-
- WaveViewThreadList _threads;
- WaveViewDrawRequestQueue _request_queue;
-};
-
-
-} // namespace ArdourCanvas
-
-#endif // __CANVAS_WAVE_VIEW_PRIVATE_H__
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