/* * Copyright (C) 2017-2019 Robin Gareus * Copyright (C) 2017 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef __ardour_disk_reader_h__ #define __ardour_disk_reader_h__ #include #include "pbd/i18n.h" #include "evoral/Curve.h" #include "ardour/disk_io.h" #include "ardour/midi_buffer.h" #include "ardour/midi_state_tracker.h" namespace ARDOUR { class Playlist; class AudioPlaylist; class MidiPlaylist; template 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 samplecnt_t chunk_samples() { return _chunk_samples; } static samplecnt_t default_chunk_samples (); static void set_chunk_samples (samplecnt_t n) { _chunk_samples = n; } void run (BufferSet& /*bufs*/, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double speed, pframes_t /*nframes*/, bool /*result_required*/); void realtime_handle_transport_stopped (); void realtime_locate (bool); bool overwrite_existing_buffers (); void set_pending_overwrite (OverwriteReason); void set_loop (Location *); int set_state (const XMLNode&, int version); PBD::Signal0 AlignmentStyleChanged; float buffer_load() const; void move_processor_automation (boost::weak_ptr, std::list > const &); /* called by the Butler in a non-realtime context as part of its normal * buffer refill loop (not due to transport-mechanism requests like * locate) */ int do_refill (); /** For contexts outside the normal butler refill loop (allocates temporary working buffers) */ int do_refill_with_alloc (bool partial_fill, bool reverse); bool pending_overwrite () const; // Working buffers for do_refill (butler thread) static void allocate_working_buffers(); static void free_working_buffers(); void adjust_buffering (); bool can_internal_playback_seek (sampleoffset_t distance); void internal_playback_seek (sampleoffset_t distance); int seek (samplepos_t sample, bool complete_refill = false); static PBD::Signal0 Underrun; void playlist_modified (); void reset_tracker (); bool declick_in_progress () const; void reload_loop (); /* inc/dec variants MUST be called as part of the process call tree, before any disk readers are invoked. We use it when the session needs the transport (and thus effective read position for DiskReaders) to keep advancing as part of syncing up with a transport master, but we don't want any actual disk output yet because we are still not synced. */ static void inc_no_disk_output (); static void dec_no_disk_output(); static bool no_disk_output () { return g_atomic_int_get (&_no_disk_output); } static void reset_loop_declick (Location*, samplecnt_t sample_rate); static void alloc_loop_declick (samplecnt_t sample_rate); protected: friend class Track; friend class MidiTrack; struct ReaderChannelInfo : public DiskIOProcessor::ChannelInfo { ReaderChannelInfo (samplecnt_t buffer_size, samplecnt_t preloop_size) : DiskIOProcessor::ChannelInfo (buffer_size) , pre_loop_buffer (0) , pre_loop_buffer_size (0) { resize (buffer_size); resize_preloop (preloop_size); } ~ReaderChannelInfo() { delete [] pre_loop_buffer; } void resize (samplecnt_t); void resize_preloop (samplecnt_t); Sample* pre_loop_buffer; samplecnt_t pre_loop_buffer_size; }; XMLNode& state (); void resolve_tracker (Evoral::EventSink& buffer, samplepos_t time); int use_playlist (DataType, boost::shared_ptr); void playlist_ranges_moved (std::list< Evoral::RangeMove > const &, bool); int add_channel_to (boost::shared_ptr, uint32_t how_many); class DeclickAmp { public: DeclickAmp (samplecnt_t sample_rate); void apply_gain (AudioBuffer& buf, samplecnt_t n_samples, const float target, sampleoffset_t buffer_offset = 0); float gain () const { return _g; } void set_gain (float g) { _g = g; } private: float _a; float _l; float _g; }; class Declicker { public: Declicker (); ~Declicker (); void alloc (samplecnt_t sr, bool fadein); void run (Sample* buf, samplepos_t start, samplepos_t end); void reset (samplepos_t start, samplepos_t end, bool fadein, samplecnt_t sr); samplepos_t fade_start; samplepos_t fade_end; samplecnt_t fade_length; Sample* vec; }; private: samplepos_t overwrite_sample; sampleoffset_t overwrite_offset; samplepos_t new_file_sample; mutable gint _pending_overwrite; bool run_must_resolve; IOChange input_change_pending; samplepos_t file_sample[DataType::num_types]; DeclickAmp _declick_amp; sampleoffset_t _declick_offs; MidiStateTracker _tracker; boost::optional _last_read_reversed; static samplecnt_t _chunk_samples; static gint _no_disk_output; static Declicker loop_declick_in; static Declicker loop_declick_out; static samplecnt_t loop_fade_length; samplecnt_t audio_read (Sample* sum_buffer, Sample* mixdown_buffer, float* gain_buffer, samplepos_t& start, samplecnt_t cnt, ReaderChannelInfo* rci, int channel, bool reversed); static Sample* _sum_buffer; static Sample* _mixdown_buffer; static gain_t* _gain_buffer; int refill (Sample* sum_buffer, Sample* mixdown_buffer, float* gain_buffer, samplecnt_t fill_level, bool reversed); int refill_audio (Sample* sum_buffer, Sample *mixdown_buffer, float *gain_buffer, samplecnt_t fill_level, bool reversed); sampleoffset_t calculate_playback_distance (pframes_t); RTMidiBuffer* rt_midibuffer(); void get_midi_playback (MidiBuffer& dst, samplepos_t start_sample, samplepos_t end_sample, MonitorState, BufferSet&, double speed, samplecnt_t distance); void maybe_xfade_loop (Sample*, samplepos_t read_start, samplepos_t read_end, ReaderChannelInfo*); bool overwrite_existing_audio (); bool overwrite_existing_midi (); }; } // namespace #endif /* __ardour_disk_reader_h__ */