audiofilesource.h

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/*
    Copyright (C) 2006 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_audiofilesource_h__
#define __ardour_audiofilesource_h__

#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;
};

class LIBARDOUR_API AudioFileSource : public AudioSource, public FileSource {
public:
        virtual ~AudioFileSource ();

        std::string peak_path (std::string audio_path);
        std::string find_broken_peakfile (std::string missing_peak_path,
                                          std::string audio_path);

        static void set_peak_dir (std::string dir) { peak_dir = dir; }

        static bool get_soundfile_info (std::string path, SoundFileInfo& _info, std::string& error);

        bool safe_file_extension (const std::string& path) const {
                return safe_audio_file_extension(path);
        }

        /* this block of methods do nothing for regular file sources, but are significant
           for files used in destructive recording.
        */
        virtual framepos_t last_capture_start_frame() const { return 0; }
        virtual void      mark_capture_start (framepos_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 (framepos_t when, struct tm&, time_t) = 0;
        virtual int flush_header () = 0;

        void mark_streaming_write_completed (const Lock& lock);

        int setup_peakfile ();

        XMLNode& get_state ();
        int set_state (const XMLNode&, int version);

        bool can_truncate_peaks() const { return !destructive(); }
        bool can_be_analysed() const    { return _length > 0; }

        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 (framecnt_t offset);

        static PBD::Signal0<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_timeline_position () = 0;
        virtual void handle_header_position_change () {}

        int move_dependents_to_trash();

        static Sample* get_interleave_buffer (framecnt_t size);

        static std::string peak_dir;

        static char bwf_country_code[3];
        static char bwf_organization_code[4];
        static char bwf_serial_number[13];

        static framecnt_t header_position_offset;

  private:
        std::string old_peak_path (std::string audio_path);
        std::string broken_peak_path (std::string audio_path);
};

} // namespace ARDOUR

#endif /* __ardour_audiofilesource_h__ */