mirror of
https://github.com/Michatec/Radio.git
synced 2026-03-31 23:46:28 +02:00
93 lines
2.8 KiB
Kotlin
93 lines
2.8 KiB
Kotlin
/*
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* AudioHelper.kt
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* Implements the AudioHelper object
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* A AudioHelper provides helper methods for handling audio files
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*
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* This file is part of
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* TRANSISTOR - Radio App for Android
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*
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* Copyright (c) 2015-22 - Y20K.org
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* Licensed under the MIT-License
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* http://opensource.org/licenses/MIT
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*/
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package com.michatec.radio.helpers
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import android.util.Log
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import androidx.annotation.OptIn
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import androidx.media3.common.Metadata
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import androidx.media3.common.util.UnstableApi
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import androidx.media3.extractor.metadata.icy.IcyHeaders
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import androidx.media3.extractor.metadata.icy.IcyInfo
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import androidx.media3.extractor.metadata.id3.Id3Frame
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import androidx.media3.extractor.metadata.id3.TextInformationFrame
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import com.michatec.radio.Keys
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import kotlin.math.min
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/*
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* AudioHelper object
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*/
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object AudioHelper {
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/* Define log tag */
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private val TAG: String = AudioHelper::class.java.simpleName
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/* Extract audio stream metadata */
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@OptIn(UnstableApi::class)
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fun getMetadataString(metadata: Metadata): String {
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var title = ""
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var artist = ""
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var album = ""
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for (i in 0 until metadata.length()) {
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// extract IceCast metadata
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when (val entry = metadata.get(i)) {
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is IcyInfo -> {
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title = entry.title.toString()
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}
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is IcyHeaders -> {
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Log.i(TAG, "icyHeaders:" + entry.name + " - " + entry.genre)
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}
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is Id3Frame -> {
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when (entry) {
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is TextInformationFrame -> {
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when (entry.id) {
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"TIT2" -> title = entry.values.getOrNull(0) ?: "" // Title
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"TPE1" -> artist = entry.values.getOrNull(0) ?: "" // Artist
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"TALB" -> album = entry.values.getOrNull(0) ?: "" // Album
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}
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}
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else -> {
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Log.d(TAG, "Unhandled ID3 frame: ${entry.javaClass.simpleName}")
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}
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}
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}
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else -> {
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Log.w(TAG, "Unsupported metadata received (type = ${entry.javaClass.simpleName})")
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}
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}
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}
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// Build metadata string
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var metadataString = title
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if (artist.isNotEmpty() && title.isNotEmpty()) {
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metadataString = "$artist - $title"
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}
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if (album.isNotEmpty() && metadataString.isNotEmpty()) {
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metadataString += " ($album)"
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}
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// ensure a max length of the metadata string
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if (metadataString.isNotEmpty()) {
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metadataString = metadataString.take(min(metadataString.length, Keys.DEFAULT_MAX_LENGTH_OF_METADATA_ENTRY))
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}
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return metadataString
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}
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}
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