audiofilesource.h

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/*
 * Copyright (C) 2006-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
 * Copyright (C) 2015-2016 Robin Gareus <robin@gareus.org>
 *
 * 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.
 */
 
#pragma once
 
#include <exception>
#include <time.h>
#include "ardour/audiosource.h"
#include "ardour/file_source.h"
 
namespace ARDOUR {
 
struct LIBARDOUR_API SoundFileInfo {
        float       samplerate;
        uint16_t    channels;
        int64_t     length;
        std::string format_name;
        int64_t     timecode;
        bool        seekable; // non-seekable files must be converted/imported
};
 
class LIBARDOUR_API AudioFileSource : public AudioSource, public FileSource {
public:
        virtual ~AudioFileSource ();
 
        std::string construct_peak_filepath (const std::string& audio_path, const bool in_session = false, const bool old_peak_name = false) const;
 
        static bool get_soundfile_info (const std::string& path, SoundFileInfo& _info, std::string& error);
 
        bool safe_file_extension (const std::string& path) const {
                return safe_audio_file_extension(path);
        }
 
        virtual samplepos_t last_capture_start_sample() const { return 0; }
        virtual void      mark_capture_start (samplepos_t) {}
        virtual void      mark_capture_end () {}
        virtual void      clear_capture_marks() {}
        virtual bool      one_of_several_channels () const { return false; }
 
        virtual void flush () = 0;
        virtual int update_header (samplepos_t when, struct tm&, time_t) = 0;
        virtual int flush_header () = 0;
 
        void mark_streaming_write_completed (const WriterLock& lock, Temporal::timecnt_t const & duration);
 
        int setup_peakfile ();
        void set_gain (float g, bool temporarily = false);
 
        XMLNode& get_state () const;
        int set_state (const XMLNode&, int version);
 
        bool can_truncate_peaks() const { return true; }
        bool can_be_analysed() const    { return _length.is_positive(); }
 
        static bool safe_audio_file_extension (const std::string& path);
 
        static bool is_empty (Session&, std::string path);
 
        static void set_bwf_serial_number (int);
        static void set_header_position_offset (samplecnt_t offset);
 
        static PBD::Signal<void()> HeaderPositionOffsetChanged;
 
protected:
        AudioFileSource (Session&, const std::string& path, Source::Flag flags);
 
        AudioFileSource (Session&, const std::string& path, const std::string& origin, Source::Flag flags,
                        SampleFormat samp_format, HeaderFormat hdr_format);
 
        AudioFileSource (Session&, const XMLNode&, bool must_exist = true);
 
        AudioFileSource (Session&, const std::string& path, Source::Flag flags, bool);
 
        int init (const std::string& idstr, bool must_exist);
 
        virtual void set_header_natural_position () = 0;
        virtual void handle_header_position_change () {}
 
        int move_dependents_to_trash();
 
        static Sample* get_interleave_buffer (samplecnt_t size);
 
        static char bwf_country_code[3];
        static char bwf_organization_code[4];
        static char bwf_serial_number[13];
 
        static samplecnt_t header_position_offset;
};
 
} // namespace ARDOUR