X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2Faudiosource.h;h=67d5ddce3ad3b965bbc1e34f1402c012c5a740f6;hb=cd17e05e3a22614387050736c89a4727c4da0d61;hp=4af857c1d63ce3985209db2eb704ac033e6df4c3;hpb=30c08ba655330232767554c48bda1975bfb5628c;p=ardour.git

diff --git a/libs/ardour/ardour/audiosource.h b/libs/ardour/ardour/audiosource.h
index 4af857c1d6..67d5ddce3a 100644
--- a/libs/ardour/ardour/audiosource.h
+++ b/libs/ardour/ardour/audiosource.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2000 Paul Davis 
+    Copyright (C) 2000 Paul Davis
 
     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
@@ -15,74 +15,76 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: audio_source.h 486 2006-04-27 09:04:24Z pauld $
 */
 
 #ifndef __ardour_audio_source_h__
 #define __ardour_audio_source_h__
 
-#include <list>
-#include <vector>
-#include <string>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
 
 #include <time.h>
 
 #include <glibmm/thread.h>
+#include <boost/function.hpp>
 
-#include <sigc++/signal.h>
-
-#include <ardour/source.h>
-#include <ardour/ardour.h>
-#include <pbd/stateful.h> 
-#include <pbd/xml++.h>
-
-using std::list;
-using std::vector;
-using std::string;
+#include "ardour/source.h"
+#include "ardour/ardour.h"
+#include "ardour/readable.h"
+#include "pbd/file_manager.h"
+#include "pbd/stateful.h"
+#include "pbd/xml++.h"
 
 namespace ARDOUR {
 
-const jack_nframes_t frames_per_peak = 256;
-
-class AudioSource : public Source
+class AudioSource : virtual public Source,
+		public ARDOUR::Readable,
+		public boost::enable_shared_from_this<ARDOUR::AudioSource>
 {
   public:
-	AudioSource (string name);
-	AudioSource (const XMLNode&);
+	AudioSource (Session&, std::string name);
+	AudioSource (Session&, const XMLNode&);
 	virtual ~AudioSource ();
-	
-	virtual jack_nframes_t available_peaks (double zoom) const;
 
-	virtual jack_nframes_t read (Sample *dst, jack_nframes_t start, jack_nframes_t cnt) const;
-	virtual jack_nframes_t write (Sample *src, jack_nframes_t cnt);
+	framecnt_t readable_length() const { return _length; }
+	virtual uint32_t n_channels()      const { return 1; }
+
+	virtual bool       empty() const;
+	framecnt_t length (framepos_t pos) const;
+	void       update_length (framepos_t pos, framecnt_t cnt);
+
+	virtual framecnt_t available_peaks (double zoom) const;
+
+	virtual framecnt_t read (Sample *dst, framepos_t start, framecnt_t cnt, int channel=0) const;
+	virtual framecnt_t write (Sample *src, framecnt_t cnt);
 
 	virtual float sample_rate () const = 0;
 
-	virtual void mark_for_remove() = 0;
-	virtual void mark_streaming_write_completed () {}
+	virtual void mark_streaming_write_completed ();
 
-	void set_captured_for (string str) { _captured_for = str; }
-	string captured_for() const { return _captured_for; }
+	virtual bool can_truncate_peaks() const { return true; }
+
+	void set_captured_for (std::string str) { _captured_for = str; }
+	std::string captured_for() const { return _captured_for; }
 
 	uint32_t read_data_count() const { return _read_data_count; }
 	uint32_t write_data_count() const { return _write_data_count; }
+	void dec_read_data_count (framecnt_t);
 
- 	int  read_peaks (PeakData *peaks, jack_nframes_t npeaks, jack_nframes_t start, jack_nframes_t cnt, double samples_per_unit) const;
- 	int  build_peaks ();
-	bool peaks_ready (sigc::slot<void>, sigc::connection&) const;
+	int read_peaks (PeakData *peaks, framecnt_t npeaks,
+			framepos_t start, framecnt_t cnt, double samples_per_visual_peak) const;
 
-	static sigc::signal<void,AudioSource*> AudioSourceCreated;
-	       
-	mutable sigc::signal<void>  PeaksReady;
-	mutable sigc::signal<void,jack_nframes_t,jack_nframes_t>  PeakRangeReady;
-	
-	XMLNode& get_state ();
-	int set_state (const XMLNode&);
+	int  build_peaks ();
+	bool peaks_ready (boost::function<void()> callWhenReady, PBD::ScopedConnection** connection_created_if_not_ready, PBD::EventLoop* event_loop) const;
+
+	mutable PBD::Signal0<void>  PeaksReady;
+	mutable PBD::Signal2<void,framepos_t,framepos_t>  PeakRangeReady;
 
-	static int  start_peak_thread ();
-	static void stop_peak_thread ();
+	XMLNode& get_state ();
+	int set_state (const XMLNode&, int version);
 
 	int rename_peakfile (std::string newpath);
+	void touch_peakfile ();
 
 	static void set_build_missing_peakfiles (bool yn) {
 		_build_missing_peakfiles = yn;
@@ -92,64 +94,84 @@ class AudioSource : public Source
 		_build_peakfiles = yn;
 	}
 
+	static bool get_build_peakfiles () {
+		return _build_peakfiles;
+	}
+
+	virtual int setup_peakfile () { return 0; }
+
+	int prepare_for_peakfile_writes ();
+	void done_with_peakfile_writes (bool done = true);
+
+	/** @return true if the each source sample s must be clamped to -1 < s < 1 */
+	virtual bool clamped_at_unity () const = 0;
+
+	static void allocate_working_buffers (framecnt_t framerate);
+
   protected:
 	static bool _build_missing_peakfiles;
 	static bool _build_peakfiles;
 
-	bool                _peaks_built;
-	mutable Glib::Mutex _lock;
-	bool                 next_peak_clear_should_notify;
-	string               peakpath;
-	string              _captured_for;
+	static size_t _working_buffers_size;
+
+	/* these collections of working buffers for supporting
+	   playlist's reading from potentially nested/recursive
+	   sources assume SINGLE THREADED reads by the butler
+	   thread, or a lock around calls that use them.
+	*/
+
+	static std::vector<boost::shared_ptr<Sample> > _mixdown_buffers;
+	static std::vector<boost::shared_ptr<gain_t> > _gain_buffers;
+	static Glib::StaticMutex    _level_buffer_lock;
+
+	static void ensure_buffers_for_level (uint32_t, framecnt_t);
+	static void ensure_buffers_for_level_locked (uint32_t, framecnt_t);
+
+	framecnt_t           _length;
+	std::string         peakpath;
+	std::string        _captured_for;
 
 	mutable uint32_t _read_data_count;  // modified in read()
 	mutable uint32_t _write_data_count; // modified in write()
 
-	int initialize_peakfile (bool newfile, string path);
-	void build_peaks_from_scratch ();
-
-	int  do_build_peak (jack_nframes_t, jack_nframes_t);
-
-	virtual jack_nframes_t read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t cnt) const = 0;
-	virtual jack_nframes_t write_unlocked (Sample *dst, jack_nframes_t cnt) = 0;
-	virtual string peak_path(string audio_path) = 0;
-	virtual string old_peak_path(string audio_path) = 0;
-	
-	static pthread_t peak_thread;
-	static bool      have_peak_thread;
-	static void*     peak_thread_work(void*);
-
-	static int peak_request_pipe[2];
-
-	struct PeakRequest {
-	    enum Type {
-		    Build,
-		    Quit
-	    };
-	};
-
-	static vector<AudioSource*> pending_peak_sources;
-	static Glib::Mutex* pending_peak_sources_lock;
-
-	static void queue_for_peaks (AudioSource&);
-	static void clear_queue_for_peaks ();
-	
-	struct PeakBuildRecord {
-	    jack_nframes_t frame;
-	    jack_nframes_t cnt;
-
-	    PeakBuildRecord (jack_nframes_t f, jack_nframes_t c) 
-		    : frame (f), cnt (c) {}
-	    PeakBuildRecord (const PeakBuildRecord& other) {
-		    frame = other.frame;
-		    cnt = other.cnt;
-	    }
-	};
-
-	list<AudioSource::PeakBuildRecord *> pending_peak_builds;
+	int initialize_peakfile (bool newfile, std::string path);
+	int build_peaks_from_scratch ();
+	int compute_and_write_peaks (Sample* buf, framecnt_t first_frame, framecnt_t cnt,
+	bool force, bool intermediate_peaks_ready_signal);
+	void truncate_peakfile();
+
+	mutable off_t _peak_byte_max; // modified in compute_and_write_peak()
+
+	virtual framecnt_t read_unlocked (Sample *dst, framepos_t start, framecnt_t cnt) const = 0;
+	virtual framecnt_t write_unlocked (Sample *dst, framecnt_t cnt) = 0;
+	virtual std::string peak_path(std::string audio_path) = 0;
+	virtual std::string find_broken_peakfile (std::string missing_peak_path,
+	                                          std::string audio_path) { return peak_path (audio_path); }
+
+	virtual int read_peaks_with_fpp (PeakData *peaks,
+					 framecnt_t npeaks, framepos_t start, framecnt_t cnt,
+					 double samples_per_visual_peak, framecnt_t fpp) const;
+
+	int compute_and_write_peaks (Sample* buf, framecnt_t first_frame, framecnt_t cnt,
+				     bool force, bool intermediate_peaks_ready_signal,
+				     framecnt_t frames_per_peak);
 
   private:
-	bool file_changed (string path);
+	bool _peaks_built;
+	/** This mutex is used to protect both the _peaks_built
+	 *  variable and also the emission (and handling) of the
+	 *  PeaksReady signal.  Holding the lock when emitting
+	 *  PeaksReady means that _peaks_built cannot be changed
+	 *  during the handling of the signal.
+	 */
+	mutable Glib::Mutex _peaks_ready_lock;
+
+	PBD::FdFileDescriptor* _peakfile_descriptor;
+	int        _peakfile_fd;
+	framecnt_t peak_leftover_cnt;
+	framecnt_t peak_leftover_size;
+	Sample*    peak_leftovers;
+	framepos_t peak_leftover_frame;
 };
 
 }