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get length of mp3 files

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minjaesong
2023-12-11 17:08:02 +09:00
parent 82e89452d6
commit b0149bcba3
1 changed files with 39 additions and 7 deletions
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46
src/net/torvald/terrarum/modulebasegame/TerrarumMusicGovernor.kt
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@@ -17,6 +17,7 @@ import net.torvald.terrarum.audio.AudioMixer
import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE
import net.torvald.unicode.EMDASH import net.torvald.unicode.EMDASH
import java.io.File import java.io.File
import java.io.FileInputStream
import javax.sound.sampled.AudioSystem import javax.sound.sampled.AudioSystem
data class MusicContainer( data class MusicContainer(
@@ -75,25 +76,56 @@ data class MusicContainer(
samplesTotal = when (gdxMusic) { samplesTotal = when (gdxMusic) {
is Wav.Music -> getWavFileSampleCount(file) is Wav.Music -> getWavFileSampleCount(file)
is Ogg.Music -> getOggFileSampleCount(file) is Ogg.Music -> getOggFileSampleCount(file)
is Mp3.Music -> getMp3FileSampleCount(file)
else -> Long.MAX_VALUE else -> Long.MAX_VALUE
} }
} }
private fun getWavFileSampleCount(file: File): Long { private fun getWavFileSampleCount(file: File): Long {
val ais = AudioSystem.getAudioInputStream(file) return try {
val r = ais.frameLength val ais = AudioSystem.getAudioInputStream(file)
ais.close() val r = ais.frameLength
return r ais.close()
r
}
catch (e: Throwable) {
Long.MAX_VALUE
}
} }
private fun getOggFileSampleCount(file: File): Long { private fun getOggFileSampleCount(file: File): Long {
try { return try {
val vorbisFile = VorbisFile(file.absolutePath) val vorbisFile = VorbisFile(file.absolutePath)
return vorbisFile.pcm_total(0) vorbisFile.pcm_total(0)
} }
catch (e: Throwable) { catch (e: Throwable) {
return Long.MAX_VALUE Long.MAX_VALUE
}
}
private fun getMp3FileSampleCount(file: File): Long {
return try {
val fis = FileInputStream(file)
val bs = Bitstream(fis)
var header = bs.readFrame()
val rate = header.frequency()
var totalSamples = 0L
while (header != null) {
totalSamples += (header.ms_per_frame() * rate / 1000).toLong()
bs.closeFrame()
header = bs.readFrame()
}
bs.close()
fis.close()
totalSamples
}
catch (_: Throwable) {
Long.MAX_VALUE
} }
} }