samples/RhythmGame/src/main/cpp/audio/AAssetDataSource.h

/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef RHYTHMGAME_AASSETDATASOURCE_H
#define RHYTHMGAME_AASSETDATASOURCE_H

#include <android/asset_manager.h>
#include <GameConstants.h>
#include "DataSource.h"

class AAssetDataSource : public DataSource {

public:
    int64_t getSize() const override { return mBufferSize; }
    AudioProperties getProperties() const override { return mProperties; }
    const float* getData() const override { return mBuffer.get(); }

    /**
     * Creates a data source from an AAsset
     * @param assetManager - the asset manager
     * @param filename - filename of the compressed audio file
     * @param outputProperties - the desired output properties of the file. Resampling and format
     * conversion may be used internally to acheive this.
     * @return AAssetDataSource
     */
    static AAssetDataSource* newFromCompressedAsset(
            AAssetManager &assetManager,
            const char *filename,
            AudioProperties *outputProperties);

    static AAssetDataSource* newFromCompressedAsset(
            AAssetManager &assetManager,
            const char *filename){
        return newFromCompressedAsset(assetManager, filename, nullptr);
    };

private:

    AAssetDataSource(std::unique_ptr<float[]> data, size_t size,
                     const AudioProperties properties)
            : mBuffer(std::move(data))
            , mBufferSize(size)
            , mProperties(properties) {
    }

    const std::unique_ptr<float[]> mBuffer;
    const int64_t mBufferSize;
    const AudioProperties mProperties;

};
#endif //RHYTHMGAME_AASSETDATASOURCE_H