From 7788892bfb8aaceaa67fccad1ea4aff325a5ac32 Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Tue, 19 Jan 2016 08:32:44 +0100 Subject: Split CacheManager into several AudioCache classes and refactored the lot of them. Unit tests added. --- src/audiocachefile.h | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 src/audiocachefile.h (limited to 'src/audiocachefile.h') diff --git a/src/audiocachefile.h b/src/audiocachefile.h new file mode 100644 index 0000000..2ed1d47 --- /dev/null +++ b/src/audiocachefile.h @@ -0,0 +1,95 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * cacheaudiofile.h + * + * Thu Dec 24 12:17:58 CET 2015 + * Copyright 2015 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#pragma once + +#include +#include +#include +#include + +#include + +#include + +class CacheChannel { +public: + size_t channel; + sample_t* samples; + size_t num_samples; + volatile bool* ready; +}; + +using CacheChannels = std::list; + +//! This class is used to encapsulate reading from a single file source. +//! The access is ref counted so that the file is only opened once and closed +//! when it is no longer required. +class AudioCacheFile { + friend class AudioCacheFiles; + friend class TestableAudioCacheFiles; +public: + //! Create file handle for filename. + AudioCacheFile(const std::string& filename); + + //! Closes file handle. + ~AudioCacheFile(); + + //! Get sample count of the file connected with this cache object. + size_t getSize() const; + + //! Get filename of the file connected with this cache object. + const std::string& getFilename() const; + + //! Get number of channels in the file + size_t getChannelCount(); + + //! Read audio data from the file into the supplied channel caches. + void readChunk(const CacheChannels& channels, size_t pos, size_t num_samples); + +private: + int ref{0}; + SNDFILE* fh{nullptr}; + SF_INFO sf_info; + std::string filename; +}; + +class AudioCacheFiles { +public: + //! Get the CacheAudioFile object corresponding to filename. + //! If it does not exist it will be created. + //! It's ref count will be increased. + AudioCacheFile& getFile(const std::string& filename); + + //! Release the CacheAudioFile corresponding to filename. + //! It's ref count will be decreased. + //! If the ref count reaches 0 the object will be deleted. + void releaseFile(const std::string& filename); + +protected: + std::map audiofiles; + std::mutex mutex; +}; -- cgit v1.2.3