166 lines
5.6 KiB
C++
166 lines
5.6 KiB
C++
/*
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* Copyright (C) 2006-2014 David Robillard <d@drobilla.net>
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* Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2018-2019 Ben Loftis <ben@harrisonconsoles.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 __ardour_audio_source_h__
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#define __ardour_audio_source_h__
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#include <boost/shared_ptr.hpp>
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#include <boost/shared_array.hpp>
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#include <boost/enable_shared_from_this.hpp>
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#include <time.h>
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#include <glibmm/threads.h>
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#include <boost/function.hpp>
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#include <boost/scoped_array.hpp>
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#include "ardour/source.h"
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#include "ardour/ardour.h"
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#include "ardour/readable.h"
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#include "pbd/stateful.h"
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#include "pbd/xml++.h"
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namespace ARDOUR {
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class LIBARDOUR_API AudioSource : virtual public Source, public ARDOUR::AudioReadable
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{
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public:
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AudioSource (Session&, const std::string& name);
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AudioSource (Session&, const XMLNode&);
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virtual ~AudioSource ();
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samplecnt_t readable_length_samples() const { return _length.samples(); }
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virtual uint32_t n_channels() const { return 1; }
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void update_length (timepos_t const & dur);
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virtual samplecnt_t available_peaks (double zoom) const;
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virtual samplecnt_t read (Sample *dst, samplepos_t start, samplecnt_t cnt, int channel=0) const;
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virtual samplecnt_t write (Sample *src, samplecnt_t cnt);
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virtual float sample_rate () const = 0;
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virtual void mark_streaming_write_completed (const WriterLock& lock);
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virtual bool can_truncate_peaks() const { return true; }
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int read_peaks (PeakData *peaks, samplecnt_t npeaks,
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samplepos_t start, samplecnt_t cnt, double samples_per_visual_peak) const;
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int build_peaks ();
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bool peaks_ready (boost::function<void()> callWhenReady, PBD::ScopedConnection** connection_created_if_not_ready, PBD::EventLoop* event_loop) const;
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mutable PBD::Signal0<void> PeaksReady;
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mutable PBD::Signal2<void,samplepos_t,samplepos_t> PeakRangeReady;
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XMLNode& get_state () const;
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int set_state (const XMLNode&, int version);
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int rename_peakfile (std::string newpath);
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void touch_peakfile ();
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static void set_build_missing_peakfiles (bool yn) {
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_build_missing_peakfiles = yn;
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}
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static void set_build_peakfiles (bool yn) {
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_build_peakfiles = yn;
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}
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static bool get_build_peakfiles () {
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return _build_peakfiles;
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}
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virtual int setup_peakfile () { return 0; }
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int close_peakfile ();
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int prepare_for_peakfile_writes ();
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void done_with_peakfile_writes (bool done = true);
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/** @return true if the each source sample s must be clamped to -1 < s < 1 */
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virtual bool clamped_at_unity () const = 0;
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protected:
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static bool _build_missing_peakfiles;
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static bool _build_peakfiles;
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/* these collections of working buffers for supporting
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playlist's reading from potentially nested/recursive
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sources assume SINGLE THREADED reads by the butler
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thread, or a lock around calls that use them.
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*/
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static std::vector<boost::shared_array<Sample> > _mixdown_buffers;
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static std::vector<boost::shared_array<gain_t> > _gain_buffers;
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static Glib::Threads::Mutex _level_buffer_lock;
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std::string _peakpath;
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int initialize_peakfile (const std::string& path, const bool in_session = false);
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int build_peaks_from_scratch ();
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int compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt,
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bool force, bool intermediate_peaks_ready_signal);
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void truncate_peakfile();
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mutable off_t _peak_byte_max; // modified in compute_and_write_peak()
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virtual samplecnt_t read_unlocked (Sample *dst, samplepos_t start, samplecnt_t cnt) const = 0;
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virtual samplecnt_t write_unlocked (Sample *dst, samplecnt_t cnt) = 0;
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virtual std::string construct_peak_filepath (const std::string& audio_path, const bool in_session = false, const bool old_peak_name = false) const = 0;
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virtual int read_peaks_with_fpp (PeakData *peaks,
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samplecnt_t npeaks, samplepos_t start, samplecnt_t cnt,
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double samples_per_visual_peak, samplecnt_t fpp) const;
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int compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt,
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bool force, bool intermediate_peaks_ready_signal,
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samplecnt_t samples_per_peak);
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private:
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bool _peaks_built;
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/** This mutex is used to protect both the _peaks_built
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* variable and also the emission (and handling) of the
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* PeaksReady signal. Holding the lock when emitting
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* PeaksReady means that _peaks_built cannot be changed
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* during the handling of the signal.
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*/
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mutable Glib::Threads::Mutex _peaks_ready_lock;
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Glib::Threads::Mutex _initialize_peaks_lock;
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int _peakfile_fd;
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samplecnt_t peak_leftover_cnt;
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samplecnt_t peak_leftover_size;
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Sample* peak_leftovers;
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samplepos_t peak_leftover_sample;
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mutable bool _first_run;
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mutable double _last_scale;
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mutable off_t _last_map_off;
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mutable size_t _last_raw_map_length;
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mutable boost::scoped_array<PeakData> peak_cache;
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};
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}
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#endif /* __ardour_audio_source_h__ */
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