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/*
Copyright (C) 2009-2016 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
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 __ardour_disk_reader_h__
#define __ardour_disk_reader_h__
#include "pbd/i18n.h"
#include "ardour/disk_io.h"
#include "ardour/midi_buffer.h"
namespace ARDOUR
{
class Playlist;
class AudioPlaylist;
class MidiPlaylist;
template<typename T> class MidiRingBuffer;
class LIBARDOUR_API DiskReader : public DiskIOProcessor
{
public:
DiskReader (Session&, std::string const & name, DiskIOProcessor::Flag f = DiskIOProcessor::Flag (0));
~DiskReader ();
bool set_name (std::string const & str);
std::string display_name() const { return std::string (_("player")); }
static framecnt_t chunk_frames() { return _chunk_frames; }
static framecnt_t default_chunk_frames ();
static void set_chunk_frames (framecnt_t n) { _chunk_frames = n; }
void run (BufferSet& /*bufs*/, framepos_t /*start_frame*/, framepos_t /*end_frame*/, double speed, pframes_t /*nframes*/, bool /*result_required*/);
void realtime_handle_transport_stopped ();
void realtime_locate ();
int overwrite_existing_buffers ();
void set_pending_overwrite (bool yn);
framecnt_t roll_delay() const { return _roll_delay; }
void set_roll_delay (framecnt_t);
virtual XMLNode& state (bool full);
int set_state (const XMLNode&, int version);
PBD::Signal0<void> AlignmentStyleChanged;
float buffer_load() const;
void move_processor_automation (boost::weak_ptr<Processor>, std::list<Evoral::RangeMove<framepos_t> > const &);
/* called by the Butler in a non-realtime context */
int do_refill () {
return refill (_mixdown_buffer, _gain_buffer, 0);
}
/** For non-butler contexts (allocates temporary working buffers)
*
* This accessible method has a default argument; derived classes
* must inherit the virtual method that we call which does NOT
* have a default argument, to avoid complications with inheritance
*/
int do_refill_with_alloc (bool partial_fill = true) {
return _do_refill_with_alloc (partial_fill);
}
bool pending_overwrite () const { return _pending_overwrite; }
// Working buffers for do_refill (butler thread)
static void allocate_working_buffers();
static void free_working_buffers();
void adjust_buffering ();
int can_internal_playback_seek (framecnt_t distance);
int internal_playback_seek (framecnt_t distance);
int seek (framepos_t frame, bool complete_refill = false);
static PBD::Signal0<void> Underrun;
void playlist_modified ();
void reset_tracker ();
static void set_midi_readahead_frames (framecnt_t frames_ahead) { midi_readahead = frames_ahead; }
static void set_no_disk_output (bool yn);
static bool no_disk_output() { return _no_disk_output; }
protected:
friend class Track;
friend class MidiTrack;
void resolve_tracker (Evoral::EventSink<framepos_t>& buffer, framepos_t time);
boost::shared_ptr<MidiBuffer> get_gui_feed_buffer () const;
void playlist_changed (const PBD::PropertyChange&);
int use_playlist (DataType, boost::shared_ptr<Playlist>);
void playlist_ranges_moved (std::list< Evoral::RangeMove<framepos_t> > const &, bool);
private:
/** The number of frames by which this diskstream's output should be delayed
with respect to the transport frame. This is used for latency compensation.
*/
framecnt_t _roll_delay;
framepos_t overwrite_frame;
off_t overwrite_offset;
bool _pending_overwrite;
bool overwrite_queued;
IOChange input_change_pending;
framepos_t file_frame[DataType::num_types];
int _do_refill_with_alloc (bool partial_fill);
static framecnt_t _chunk_frames;
static framecnt_t midi_readahead;
static bool _no_disk_output;
/* The MIDI stuff */
/** A buffer that we use to put newly-arrived MIDI data in for
the GUI to read (so that it can update itself).
*/
MidiBuffer _gui_feed_buffer;
mutable Glib::Threads::Mutex _gui_feed_buffer_mutex;
int audio_read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
framepos_t& start, framecnt_t cnt,
int channel, bool reversed);
int midi_read (framepos_t& start, framecnt_t cnt, bool reversed);
static Sample* _mixdown_buffer;
static gain_t* _gain_buffer;
int refill (Sample* mixdown_buffer, float* gain_buffer, framecnt_t fill_level);
int refill_audio (Sample *mixdown_buffer, float *gain_buffer, framecnt_t fill_level);
int refill_midi ();
frameoffset_t calculate_playback_distance (pframes_t);
void get_midi_playback (MidiBuffer& dst, framecnt_t nframes, MonitorState, BufferSet&, double speed, framecnt_t distance);
};
} // namespace
#endif /* __ardour_disk_reader_h__ */
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