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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_io_h__
#define __ardour_disk_io_h__
#include <vector>
#include <string>
#include <exception>
#include "pbd/ringbufferNPT.h"
#include "pbd/rcu.h"
#include "ardour/interpolation.h"
#include "ardour/processor.h"
namespace ARDOUR {
class AudioFileSource;
class AudioPlaylist;
class Location;
class MidiPlaylist;
class Playlist;
class Route;
class Route;
class Session;
template<typename T> class MidiRingBuffer;
class LIBARDOUR_API DiskIOProcessor : public Processor
{
public:
enum Flag {
Recordable = 0x1,
Hidden = 0x2,
Destructive = 0x4,
NonLayered = 0x8 // deprecated (kept only for enum compat)
};
static const std::string state_node_name;
DiskIOProcessor (Session&, const std::string& name, Flag f);
virtual ~DiskIOProcessor ();
void set_route (boost::shared_ptr<Route>);
void drop_route ();
static void set_buffering_parameters (BufferingPreset bp);
int set_block_size (pframes_t);
bool configure_io (ChanCount in, ChanCount out);
bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
/** @return A number between 0 and 1, where 0 indicates that the playback/capture buffer
* is dry (ie the disk subsystem could not keep up) and 1 indicates that the
* buffer is full.
*/
virtual float buffer_load() const = 0;
void set_flag (Flag f) { _flags = Flag (_flags | f); }
void unset_flag (Flag f) { _flags = Flag (_flags & ~f); }
bool hidden() const { return _flags & Hidden; }
bool recordable() const { return _flags & Recordable; }
virtual void non_realtime_locate (samplepos_t);
virtual void punch_in() {}
virtual void punch_out() {}
bool slaved() const { return _slaved; }
void set_slaved(bool yn) { _slaved = yn; }
PBD::Signal0<void> SpeedChanged;
PBD::Signal0<void> ReverseChanged;
int set_state (const XMLNode&, int version);
int add_channel (uint32_t how_many);
int remove_channel (uint32_t how_many);
bool need_butler() const { return _need_butler; }
boost::shared_ptr<Playlist> get_playlist (DataType dt) const { return _playlists[dt]; }
boost::shared_ptr<MidiPlaylist> midi_playlist() const;
boost::shared_ptr<AudioPlaylist> audio_playlist() const;
virtual void playlist_modified () {}
virtual int use_playlist (DataType, boost::shared_ptr<Playlist>);
virtual void adjust_buffering() = 0;
protected:
friend class Auditioner;
virtual int seek (samplepos_t which_sample, bool complete_refill = false) = 0;
protected:
Flag _flags;
uint32_t i_am_the_modifier;
double _actual_speed;
double _target_speed;
bool _slaved;
bool in_set_state;
samplepos_t playback_sample;
bool _need_butler;
boost::shared_ptr<Route> _route;
void init ();
Glib::Threads::Mutex state_lock;
static bool get_buffering_presets (BufferingPreset bp,
samplecnt_t& read_chunk_size,
samplecnt_t& read_buffer_size,
samplecnt_t& write_chunk_size,
samplecnt_t& write_buffer_size);
enum TransitionType {
CaptureStart = 0,
CaptureEnd
};
struct CaptureTransition {
TransitionType type;
samplepos_t capture_val; ///< The start or end file sample position
};
/** Information about one audio channel, playback or capture
* (depending on the derived class)
*/
struct ChannelInfo : public boost::noncopyable {
ChannelInfo (samplecnt_t buffer_size);
virtual ~ChannelInfo ();
/** Ringbuffer for data to be played back.
* written to in the butler thread, read from in the process thread.
*/
PBD::RingBufferNPT<Sample>* rbuf;
/** A ringbuffer for data to be recorded back, written to in the
* process thread, read from in the butler thread.
*/
PBD::RingBufferNPT<Sample>* wbuf;
PBD::RingBufferNPT<Sample>::rw_vector rw_vector;
/* used only by capture */
boost::shared_ptr<AudioFileSource> write_source;
PBD::RingBufferNPT<CaptureTransition>* capture_transition_buf;
/* used in the butler thread only */
samplecnt_t curr_capture_cnt;
virtual void resize (samplecnt_t) = 0;
};
typedef std::vector<ChannelInfo*> ChannelList;
SerializedRCUManager<ChannelList> channels;
virtual int add_channel_to (boost::shared_ptr<ChannelList>, uint32_t how_many) = 0;
int remove_channel_from (boost::shared_ptr<ChannelList>, uint32_t how_many);
boost::shared_ptr<Playlist> _playlists[DataType::num_types];
PBD::ScopedConnectionList playlist_connections;
virtual void playlist_changed (const PBD::PropertyChange&) {}
virtual void playlist_deleted (boost::weak_ptr<Playlist>);
virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<samplepos_t> > const &, bool) {}
/* The MIDI stuff */
MidiRingBuffer<samplepos_t>* _midi_buf;
gint _samples_written_to_ringbuffer;
gint _samples_read_from_ringbuffer;
static void get_location_times (const Location* location, samplepos_t* start, samplepos_t* end, samplepos_t* length);
};
} // namespace ARDOUR
#endif /* __ardour_disk_io_h__ */
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