amethyst/app/src/main/java/com/vitorpamplona/amethyst/service/playback/VideoCache.kt

/**
 * Copyright (c) 2024 Vitor Pamplona
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
 * Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.vitorpamplona.amethyst.service.playback

import android.annotation.SuppressLint
import android.content.Context
import androidx.media3.database.StandaloneDatabaseProvider
import androidx.media3.datasource.cache.CacheDataSource
import androidx.media3.datasource.cache.LeastRecentlyUsedCacheEvictor
import androidx.media3.datasource.cache.SimpleCache
import androidx.media3.datasource.okhttp.OkHttpDataSource
import okhttp3.OkHttpClient
import java.io.File

@SuppressLint("UnsafeOptInUsageError")
class VideoCache {
    var exoPlayerCacheSize: Long = 150 * 1024 * 1024 // 90MB

    var leastRecentlyUsedCacheEvictor = LeastRecentlyUsedCacheEvictor(exoPlayerCacheSize)

    lateinit var exoDatabaseProvider: StandaloneDatabaseProvider
    lateinit var simpleCache: SimpleCache

    lateinit var cacheDataSourceFactory: CacheDataSource.Factory

    @Synchronized
    fun initFileCache(context: Context) {
        exoDatabaseProvider = StandaloneDatabaseProvider(context)

        simpleCache =
            SimpleCache(
                File(context.cacheDir, "exoplayer"),
                leastRecentlyUsedCacheEvictor,
                exoDatabaseProvider,
            )
    }

    // This method should be called when proxy setting changes.
    fun renewCacheFactory(client: OkHttpClient) {
        cacheDataSourceFactory =
            CacheDataSource.Factory()
                .setCache(simpleCache)
                .setUpstreamDataSourceFactory(
                    OkHttpDataSource.Factory(client),
                )
                .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)
    }

    fun get(client: OkHttpClient): CacheDataSource.Factory {
        // Renews the factory because OkHttpMight have changed.
        renewCacheFactory(client)

        return cacheDataSourceFactory
    }
}