mirror of
https://github.com/MaSzyna-EU07/maszyna.git
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91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#if defined(__APPLE__) && !__has_include(<AL/al.h>)
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#include <OpenAL/al.h>
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#include <OpenAL/alc.h>
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#else
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#include <AL/al.h>
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#include <AL/alc.h>
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#include <AL/alext.h>
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#endif
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namespace audio {
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ALuint const null_resource{ ~ALuint{0} };
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// wrapper for audio sample
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struct openal_buffer {
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// members
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ALuint id { null_resource }; // associated AL resource
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unsigned int rate {}; // sample rate of the data
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std::string name;
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std::string caption;
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// constructors
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openal_buffer() = default;
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explicit openal_buffer( std::string const &Filename );
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// methods
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// retrieves sound caption in currently set language
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void
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fetch_caption();
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};
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using buffer_handle = std::size_t;
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//
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class buffer_manager {
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public:
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// constructors
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buffer_manager(); // makes empty bindings for null buffer
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// destructor
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~buffer_manager();
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// methods
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// creates buffer object out of data stored in specified file. returns: handle to the buffer or null_handle if creation failed
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buffer_handle
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create( std::string const &Filename );
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// provides direct access to a specified buffer. a buffer still decoded in the background is completed first
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audio::openal_buffer const &
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buffer( audio::buffer_handle const Buffer ) const;
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// creates AL buffers for files decoded in the background so far, or for all of them if requested
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void
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update( bool const Wait = false );
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private:
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// types
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using buffer_sequence = std::vector<openal_buffer>;
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using index_map = std::unordered_map<std::string, std::size_t>;
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struct decoder; // background decoding of sound files, used with sound.asyncload
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// methods
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// places in the bank a buffer containing data stored in specified file. returns: handle to the buffer
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buffer_handle
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emplace( std::string Filename );
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// checks whether specified buffer is in the buffer bank. returns: buffer handle, or null_handle.
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buffer_handle
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find_buffer( std::string const &Buffername ) const;
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// checks whether specified file exists. returns: name of the located file, or empty string.
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std::string
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find_file( std::string const &Filename ) const;
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// creates AL buffer for a file decoded in the background, waiting for the decoder if needed
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void
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complete( audio::buffer_handle const Buffer ) const;
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// members
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mutable buffer_sequence m_buffers; // buffers decoded in the background are completed on first access
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index_map m_buffermappings;
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mutable std::unique_ptr<decoder> m_decoder;
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};
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} // audio
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//---------------------------------------------------------------------------
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