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Diffstat (limited to 'libs/canvas/canvas/wave_view_private.h')
| -rw-r--r-- | libs/canvas/canvas/wave_view_private.h | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/libs/canvas/canvas/wave_view_private.h b/libs/canvas/canvas/wave_view_private.h deleted file mode 100644 index d870300998..0000000000 --- a/libs/canvas/canvas/wave_view_private.h +++ /dev/null @@ -1,365 +0,0 @@ -/* - 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__ |