audio_instrument_atlas.hpp

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// audio_instrument_atlas.hpp
/*
  neogfx C++ App/Game Engine
  Copyright (c) 2021 Leigh Johnston.  All Rights Reserved.
  
  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 3 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, see <http://www.gnu.org/licenses/>.
*/
 
#include <neogfx/neogfx.hpp>
#include <neogfx/audio/audio_primitives.hpp>
#include <neogfx/audio/i_audio_instrument_atlas.hpp>
 
#pragma once
 
namespace neogfx
{
    class audio_instrument_atlas : public i_audio_instrument_atlas
    {
    private:
        typedef std::tuple<neogfx::instrument, audio_sample_rate, note> note_key;
        struct sample_info
        {
            std::string sampleFile;
            note midiKeyLow;
            note midiKeyPitchCentre;
            note midiKeyHigh;
        };
    public:
        audio_instrument_atlas();
    public:
        bool load_instrument(neogfx::instrument aInstrument, audio_sample_rate aSampleRate) override;
        i_audio_bitstream& instrument(neogfx::instrument aInstrument, audio_sample_rate aSampleRate, note aNote) override;
    private:
        std::map<neogfx::instrument, std::map<note, sample_info>> iSamples;
        std::map<note_key, ref_ptr<i_audio_bitstream>> iNotes;
    };
}