2 Copyright (C) 2009-2016 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_disk_reader_h__
21 #define __ardour_disk_reader_h__
23 #include "ardour/disk_io.h"
24 #include "ardour/midi_buffer.h"
32 template<typename T> class MidiRingBuffer;
34 class LIBARDOUR_API DiskReader : public DiskIOProcessor
37 DiskReader (Session&, std::string const & name, DiskIOProcessor::Flag f = DiskIOProcessor::Flag (0));
40 bool set_name (std::string const & str);
42 static framecnt_t chunk_frames() { return _chunk_frames; }
43 static framecnt_t default_chunk_frames ();
44 static void set_chunk_frames (framecnt_t n) { _chunk_frames = n; }
46 void run (BufferSet& /*bufs*/, framepos_t /*start_frame*/, framepos_t /*end_frame*/, double speed, pframes_t /*nframes*/, bool /*result_required*/);
47 int set_block_size (pframes_t);
48 bool configure_io (ChanCount in, ChanCount out);
49 bool can_support_io_configuration (const ChanCount& in, ChanCount& out) = 0;
50 void realtime_handle_transport_stopped ();
51 void realtime_locate ();
52 void non_realtime_locate (framepos_t);
53 int overwrite_existing_buffers ();
54 void set_pending_overwrite (bool yn);
56 framecnt_t roll_delay() const { return _roll_delay; }
57 void set_roll_delay (framecnt_t);
59 virtual XMLNode& state (bool full);
60 int set_state (const XMLNode&, int version);
62 boost::shared_ptr<Playlist> get_playlist (DataType dt) const { return _playlists[dt]; }
63 boost::shared_ptr<MidiPlaylist> midi_playlist() const;
64 boost::shared_ptr<AudioPlaylist> audio_playlist() const;
66 virtual void playlist_modified ();
67 virtual int use_playlist (DataType, boost::shared_ptr<Playlist>);
68 virtual int use_new_playlist (DataType);
69 virtual int use_copy_playlist (DataType);
71 PBD::Signal1<void,DataType> PlaylistChanged;
72 PBD::Signal0<void> AlignmentStyleChanged;
74 int set_loop (Location *loc);
76 float buffer_load() const;
78 void move_processor_automation (boost::weak_ptr<Processor>, std::list<Evoral::RangeMove<framepos_t> > const &);
80 /* called by the Butler in a non-realtime context */
83 return refill (_mixdown_buffer, _gain_buffer, 0);
86 /** For non-butler contexts (allocates temporary working buffers)
88 * This accessible method has a default argument; derived classes
89 * must inherit the virtual method that we call which does NOT
90 * have a default argument, to avoid complications with inheritance
92 int do_refill_with_alloc (bool partial_fill = true) {
93 return _do_refill_with_alloc (partial_fill);
96 bool pending_overwrite () const { return _pending_overwrite; }
98 virtual int find_and_use_playlist (DataType, std::string const &);
100 // Working buffers for do_refill (butler thread)
101 static void allocate_working_buffers();
102 static void free_working_buffers();
104 void adjust_buffering ();
106 int can_internal_playback_seek (framecnt_t distance);
107 int seek (framepos_t frame, bool complete_refill = false);
109 bool need_butler() const { return _need_butler; }
111 PBD::Signal0<void> Underrun;
114 boost::shared_ptr<Playlist> _playlists[DataType::num_types];
116 virtual void playlist_changed (const PBD::PropertyChange&);
117 virtual void playlist_deleted (boost::weak_ptr<Playlist>);
118 virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<framepos_t> > const &, bool);
120 void reset_tracker ();
121 void resolve_tracker (Evoral::EventSink<framepos_t>& buffer, framepos_t time);
122 boost::shared_ptr<MidiBuffer> get_gui_feed_buffer () const;
125 /** The number of frames by which this diskstream's output should be delayed
126 with respect to the transport frame. This is used for latency compensation.
128 framecnt_t _roll_delay;
129 Location* loop_location;
130 framepos_t overwrite_frame;
131 off_t overwrite_offset;
132 bool _pending_overwrite;
133 bool overwrite_queued;
134 IOChange input_change_pending;
135 framecnt_t wrap_buffer_size;
136 framecnt_t speed_buffer_size;
137 framepos_t file_frame;
138 framepos_t playback_sample;
139 MonitorChoice _monitoring_choice;
142 PBD::ScopedConnectionList playlist_connections;
144 int _do_refill_with_alloc (bool partial_fill);
146 static framecnt_t _chunk_frames;
147 static framecnt_t midi_readahead;
151 MidiRingBuffer<framepos_t>* _midi_buf;
153 /** A buffer that we use to put newly-arrived MIDI data in for
154 the GUI to read (so that it can update itself).
156 MidiBuffer _gui_feed_buffer;
157 mutable Glib::Threads::Mutex _gui_feed_buffer_mutex;
158 CubicMidiInterpolation midi_interpolation;
159 gint _frames_written_to_ringbuffer;
160 gint _frames_read_from_ringbuffer;
163 int audio_read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
164 framepos_t& start, framecnt_t cnt,
165 int channel, bool reversed);
166 int midi_read (framepos_t& start, framecnt_t cnt, bool reversed);
168 static Sample* _mixdown_buffer;
169 static gain_t* _gain_buffer;
171 int refill (Sample* mixdown_buffer, float* gain_buffer, framecnt_t fill_level);
172 int refill_audio (Sample *mixdown_buffer, float *gain_buffer, framecnt_t fill_level);
175 int internal_playback_seek (framecnt_t distance);
176 frameoffset_t calculate_playback_distance (pframes_t);
178 void allocate_temporary_buffers();
179 void get_playback (MidiBuffer& dst, framecnt_t nframes);
180 void flush_playback (framepos_t start, framepos_t end);
185 #endif /* __ardour_disk_reader_h__ */