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Diffstat (limited to 'libs/ardour/ardour/audiosource.h')
| -rw-r--r-- | libs/ardour/ardour/audiosource.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/libs/ardour/ardour/audiosource.h b/libs/ardour/ardour/audiosource.h new file mode 100644 index 0000000000..d11b829694 --- /dev/null +++ b/libs/ardour/ardour/audiosource.h @@ -0,0 +1,159 @@ +/* + Copyright (C) 2000 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_audio_source_h__ +#define __ardour_audio_source_h__ + +#include <list> +#include <vector> + +#include <boost/shared_ptr.hpp> +#include <boost/enable_shared_from_this.hpp> + +#include <time.h> + +#include <glibmm/thread.h> +#include <glibmm/ustring.h> + +#include <sigc++/signal.h> + +#include <ardour/source.h> +#include <ardour/ardour.h> +#include <pbd/stateful.h> +#include <pbd/xml++.h> + +using std::list; +using std::vector; + +namespace ARDOUR { + +class AudioSource : public Source, public boost::enable_shared_from_this<ARDOUR::AudioSource> +{ + public: + AudioSource (Session&, Glib::ustring name); + AudioSource (Session&, const XMLNode&); + virtual ~AudioSource (); + + nframes64_t readable_length() const { return _length; } + uint32_t n_channels() const { return 1; } + + virtual nframes_t available_peaks (double zoom) const; + + /* stopgap until nframes_t becomes nframes64_t. this function is needed by the Readable interface */ + + virtual nframes64_t read (Sample *dst, nframes64_t start, nframes64_t cnt, int channel) const { + /* XXX currently ignores channel, assuming that source is always mono, which + historically has been true. + */ + return read (dst, (nframes_t) start, (nframes_t) cnt); + } + + virtual nframes_t read (Sample *dst, nframes_t start, nframes_t cnt) const; + virtual nframes_t write (Sample *src, nframes_t cnt); + + virtual float sample_rate () const = 0; + + virtual void mark_for_remove() = 0; + virtual void mark_streaming_write_completed () {} + + virtual bool can_truncate_peaks() const { return true; } + + void set_captured_for (Glib::ustring str) { _captured_for = str; } + Glib::ustring captured_for() const { return _captured_for; } + + uint32_t read_data_count() const { return _read_data_count; } + uint32_t write_data_count() const { return _write_data_count; } + + int read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_visual_peak) const; + + int build_peaks (); + bool peaks_ready (sigc::slot<void>, sigc::connection&) const; + + mutable sigc::signal<void> PeaksReady; + mutable sigc::signal<void,nframes_t,nframes_t> PeakRangeReady; + + XMLNode& get_state (); + int set_state (const XMLNode&); + + int rename_peakfile (Glib::ustring newpath); + void touch_peakfile (); + + static void set_build_missing_peakfiles (bool yn) { + _build_missing_peakfiles = yn; + } + + static void set_build_peakfiles (bool yn) { + _build_peakfiles = yn; + } + + static bool get_build_peakfiles () { + return _build_peakfiles; + } + + virtual int setup_peakfile () { return 0; } + + int prepare_for_peakfile_writes (); + void done_with_peakfile_writes (bool done = true); + + protected: + static bool _build_missing_peakfiles; + static bool _build_peakfiles; + + bool _peaks_built; + mutable Glib::Mutex _lock; + mutable Glib::Mutex _peaks_ready_lock; + Glib::ustring peakpath; + Glib::ustring _captured_for; + + mutable uint32_t _read_data_count; // modified in read() + mutable uint32_t _write_data_count; // modified in write() + + int initialize_peakfile (bool newfile, Glib::ustring path); + int build_peaks_from_scratch (); + int compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, bool intermediate_peaks_ready_signal); + void truncate_peakfile(); + + mutable off_t _peak_byte_max; // modified in compute_and_write_peak() + + virtual nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const = 0; + virtual nframes_t write_unlocked (Sample *dst, nframes_t cnt) = 0; + virtual Glib::ustring peak_path(Glib::ustring audio_path) = 0; + virtual Glib::ustring find_broken_peakfile (Glib::ustring missing_peak_path, Glib::ustring audio_path) = 0; + + void update_length (nframes_t pos, nframes_t cnt); + + virtual int read_peaks_with_fpp (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, + double samples_per_visual_peak, nframes_t fpp) const; + + int compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, + bool intermediate_peaks_ready_signal, nframes_t frames_per_peak); + + private: + int peakfile; + nframes_t peak_leftover_cnt; + nframes_t peak_leftover_size; + Sample* peak_leftovers; + nframes_t peak_leftover_frame; + + bool file_changed (Glib::ustring path); +}; + +} + +#endif /* __ardour_audio_source_h__ */ |