88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/*
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* Copyright (C) 2021 Marijn Kruisselbrink <mek@google.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_ffmpegfile_importable_source_h_
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#define _ardour_ffmpegfile_importable_source_h_
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#include "pbd/g_atomic_compat.h"
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#include "pbd/ringbuffer.h"
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#include "ardour/importable_source.h"
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#include "ardour/libardour_visibility.h"
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#include "ardour/system_exec.h"
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#include "ardour/types.h"
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namespace ARDOUR {
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class LIBARDOUR_API FFMPEGFileImportableSource : public ImportableSource
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{
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public:
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enum {
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ALL_CHANNELS = -1,
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};
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FFMPEGFileImportableSource (const std::string& path, int channel = ALL_CHANNELS);
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virtual ~FFMPEGFileImportableSource ();
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/* ImportableSource API */
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samplecnt_t read (Sample*, samplecnt_t nframes);
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uint32_t channels () const { return _channels; }
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samplecnt_t length () const { return _length; }
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samplecnt_t samplerate () const { return _samplerate; }
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void seek (samplepos_t pos);
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samplepos_t natural_position () const { return _natural_position; }
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bool clamped_at_unity () const { return false; }
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std::string format_name () const { return _format_name; }
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private:
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void start_ffmpeg ();
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void reset ();
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void did_read_data (std::string data, size_t size);
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std::string _path;
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int _channel;
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uint32_t _channels;
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samplecnt_t _length;
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samplecnt_t _samplerate;
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samplepos_t _natural_position;
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std::string _format_name;
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PBD::RingBuffer<Sample> _buffer;
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/* Set to 1 to indicate that ffmpeg should be terminating. */
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GATOMIC_QUAL gint _ffmpeg_should_terminate;
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/* To make sure we don't try to parse partial floats, we might have a couple of bytes
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* of leftover unparsable data after any `did_read_data` call. Those couple of bytes are
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* stored here until the next `did_read_data` call.
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*/
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std::string _leftover_data;
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samplecnt_t _read_pos;
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ARDOUR::SystemExec* _ffmpeg_exec;
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PBD::ScopedConnection _ffmpeg_conn;
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};
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} // namespace ARDOUR
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#endif /* _ardour_ffmpegfile_importable_source_h_ */
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