261 lines
7.9 KiB
C++
261 lines
7.9 KiB
C++
/*
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* Copyright (C) 2017-2019 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.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_disk_reader_h_
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#define _ardour_disk_reader_h_
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#include <atomic>
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#include <boost/optional.hpp>
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#include "evoral/Curve.h"
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#include "ardour/disk_io.h"
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#include "ardour/midi_buffer.h"
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#include "ardour/midi_state_tracker.h"
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namespace ARDOUR
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{
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class Playlist;
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class AudioPlaylist;
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class MidiPlaylist;
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template <typename T> class MidiRingBuffer;
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class /*LIBARDOUR_API*/ DiskReader : public DiskIOProcessor
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{
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public:
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LIBARDOUR_API DiskReader (Session&, Track&, std::string const& name, Temporal::TimeDomainProvider const &, DiskIOProcessor::Flag f = DiskIOProcessor::Flag (0));
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LIBARDOUR_API ~DiskReader ();
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LIBARDOUR_API bool set_name (std::string const& str);
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LIBARDOUR_API std::string display_name () const;
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LIBARDOUR_API static samplecnt_t chunk_samples ()
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{
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return _chunk_samples;
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}
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LIBARDOUR_API static void set_chunk_samples (samplecnt_t n)
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{
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_chunk_samples = n;
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}
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LIBARDOUR_API static samplecnt_t default_chunk_samples ();
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LIBARDOUR_API void run (BufferSet& /*bufs*/, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double speed, pframes_t /*nframes*/, bool /*result_required*/);
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LIBARDOUR_API void realtime_handle_transport_stopped ();
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LIBARDOUR_API void realtime_locate (bool);
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LIBARDOUR_API bool overwrite_existing_buffers ();
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LIBARDOUR_API void set_pending_overwrite (OverwriteReason);
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LIBARDOUR_API void set_loop (Location*);
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LIBARDOUR_API int set_state (const XMLNode&, int version);
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PBD::Signal0<void> AlignmentStyleChanged;
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LIBARDOUR_API float buffer_load () const;
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LIBARDOUR_API void move_processor_automation (std::weak_ptr<Processor>, std::list<Temporal::RangeMove> const&);
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/* called by the Butler in a non-realtime context as part of its normal
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* buffer refill loop (not due to transport-mechanism requests like
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* locate)
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*/
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LIBARDOUR_API int do_refill ();
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/** For contexts outside the normal butler refill loop (allocates temporary working buffers) */
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int do_refill_with_alloc (bool partial_fill, bool reverse);
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LIBARDOUR_API bool pending_overwrite () const;
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/* Working buffers for do_refill (butler thread) */
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LIBARDOUR_API static void allocate_working_buffers ();
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LIBARDOUR_API static void free_working_buffers ();
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LIBARDOUR_API void adjust_buffering ();
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LIBARDOUR_API bool can_internal_playback_seek (sampleoffset_t distance);
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LIBARDOUR_API void internal_playback_seek (sampleoffset_t distance);
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LIBARDOUR_API int seek (samplepos_t sample, bool complete_refill = false);
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LIBARDOUR_API static PBD::Signal0<void> Underrun;
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LIBARDOUR_API void playlist_modified ();
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LIBARDOUR_API void reset_tracker ();
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LIBARDOUR_API bool declick_in_progress () const;
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LIBARDOUR_API void set_need_midi_catchup (bool);
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/* inc/dec variants MUST be called as part of the process call tree, before any
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* disk readers are invoked. We use it when the session needs the
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* transport (and thus effective read position for DiskReaders) to keep
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* advancing as part of syncing up with a transport master, but we
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* don't want any actual disk output yet because we are still not
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* synced.
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*/
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LIBARDOUR_API static void inc_no_disk_output ();
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LIBARDOUR_API static void dec_no_disk_output ();
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LIBARDOUR_API static bool no_disk_output ()
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{
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return _no_disk_output.load ();
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}
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LIBARDOUR_API static void reset_loop_declick (Location*, samplecnt_t sample_rate);
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LIBARDOUR_API static void alloc_loop_declick (samplecnt_t sample_rate);
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protected:
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friend class Track;
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friend class MidiTrack;
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struct ReaderChannelInfo : public DiskIOProcessor::ChannelInfo {
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LIBARDOUR_API ReaderChannelInfo (samplecnt_t buffer_size, samplecnt_t preloop_size)
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: DiskIOProcessor::ChannelInfo (buffer_size)
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, pre_loop_buffer (0)
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, pre_loop_buffer_size (0)
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, initialized (false)
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{
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resize (buffer_size);
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}
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LIBARDOUR_API ~ReaderChannelInfo ()
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{
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delete[] pre_loop_buffer;
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}
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LIBARDOUR_API void resize (samplecnt_t);
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LIBARDOUR_API void resize_preloop (samplecnt_t);
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Sample* pre_loop_buffer;
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samplecnt_t pre_loop_buffer_size;
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bool initialized;
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};
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LIBARDOUR_API XMLNode& state () const;
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LIBARDOUR_API void resolve_tracker (Evoral::EventSink<samplepos_t>& buffer, samplepos_t time);
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LIBARDOUR_API int use_playlist (DataType, std::shared_ptr<Playlist>);
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LIBARDOUR_API void playlist_ranges_moved (std::list<Temporal::RangeMove> const&, bool);
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LIBARDOUR_API int add_channel_to (std::shared_ptr<ChannelList>, uint32_t how_many);
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class DeclickAmp
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{
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public:
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DeclickAmp (samplecnt_t sample_rate);
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void apply_gain (AudioBuffer& buf, samplecnt_t n_samples, const float target, sampleoffset_t buffer_offset = 0);
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float gain () const
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{
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return _g;
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}
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void set_gain (float g)
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{
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_g = g;
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}
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private:
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float _a;
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float _l;
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float _g;
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};
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class Declicker
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{
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public:
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Declicker ();
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~Declicker ();
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void alloc (samplecnt_t sr, bool fadein, bool linear);
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void run (Sample* buf, samplepos_t start, samplepos_t end);
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void reset (samplepos_t start, samplepos_t end, bool fadein, samplecnt_t sr);
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samplepos_t fade_start;
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samplepos_t fade_end;
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samplecnt_t fade_length;
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Sample* vec;
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};
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private:
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samplepos_t overwrite_sample;
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sampleoffset_t overwrite_offset;
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samplepos_t new_file_sample;
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bool run_must_resolve;
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IOChange input_change_pending;
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samplepos_t file_sample[DataType::num_types];
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mutable std::atomic<OverwriteReason> _pending_overwrite;
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DeclickAmp _declick_amp;
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sampleoffset_t _declick_offs;
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bool _declick_enabled;
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MidiNoteTracker _tracker;
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boost::optional<bool> _last_read_reversed;
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boost::optional<bool> _last_read_loop;
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static samplecnt_t _chunk_samples;
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static std::atomic<int> _no_disk_output;
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static Declicker loop_declick_in;
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static Declicker loop_declick_out;
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static samplecnt_t loop_fade_length;
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samplecnt_t audio_read (Sample* sum_buffer,
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Sample* mixdown_buffer,
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float* gain_buffer,
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samplepos_t& start, samplecnt_t cnt,
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ReaderChannelInfo* rci,
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int channel,
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bool reversed);
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static thread_local Sample* _sum_buffer;
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static thread_local Sample* _mixdown_buffer;
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static thread_local gain_t* _gain_buffer;
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int refill (Sample* sum_buffer, Sample* mixdown_buffer, float* gain_buffer, samplecnt_t fill_level, bool reversed);
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int refill_audio (Sample* sum_buffer, Sample* mixdown_buffer, float* gain_buffer, samplecnt_t fill_level, bool reversed);
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sampleoffset_t calculate_playback_distance (pframes_t);
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RTMidiBuffer* rt_midibuffer ();
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void get_midi_playback (MidiBuffer& dst, samplepos_t start_sample, samplepos_t end_sample, MonitorState, BufferSet&, double speed, samplecnt_t distance);
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void maybe_xfade_loop (Sample*, samplepos_t read_start, samplepos_t read_end, ReaderChannelInfo*);
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void configuration_changed ();
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bool overwrite_existing_audio ();
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bool overwrite_existing_midi ();
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samplepos_t last_refill_loop_start;
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void setup_preloop_buffer ();
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bool _midi_catchup;
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bool _need_midi_catchup;
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};
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} // namespace ARDOUR
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#endif /* _ardour_disk_reader_h_ */
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