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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,91 @@ | ||
| package tools | ||
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| import org.apache.commons.lang3.StringUtils | ||
| import org.apache.pekko.actor.ActorSystem | ||
| import org.apache.pekko.stream.scaladsl.{Framing, Sink, Source, StreamConverters} | ||
| import org.apache.pekko.util.ByteString | ||
| import org.slf4j.{Logger, LoggerFactory} | ||
|
|
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| import java.io.FileInputStream | ||
| import java.time.format.DateTimeFormatter | ||
| import java.time.{Duration, LocalTime} | ||
| import scala.concurrent.duration.DurationInt | ||
| import scala.concurrent.{Await, ExecutionContextExecutor} | ||
|
|
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| /** | ||
| * Run with a reasonably well formatted .srt file in UTF-8 encoding | ||
| * | ||
| * @param sourceFilePath | ||
| */ | ||
| class SrtParser(sourceFilePath: String) { | ||
| val logger: Logger = LoggerFactory.getLogger(this.getClass) | ||
| implicit val system: ActorSystem = ActorSystem() | ||
| implicit val executionContext: ExecutionContextExecutor = system.dispatcher | ||
|
|
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| val ls = sys.props("line.separator") | ||
|
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| private val frameByEmptyLine = Framing.delimiter( | ||
| ByteString(ls + ls), | ||
| maximumFrameLength = 2048, | ||
| allowTruncation = true) | ||
|
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| private def toMillisOfDay(value: String) = { | ||
| val formatter = DateTimeFormatter.ofPattern("HH:mm:ss,SSS") | ||
| val localTime = LocalTime.parse(value, formatter) | ||
| localTime.toNanoOfDay / 1_000_000 | ||
| } | ||
|
|
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| private def convertTo(raw: String) = { | ||
| val parts = raw.split(ls) | ||
| val times = parts(1).split("""\s*-->\s*""") | ||
| val lines = parts.drop(2).toList | ||
| SubtitleBlock(toMillisOfDay(times.head), toMillisOfDay(times.tail.head), lines) | ||
| } | ||
|
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| val source: Source[SubtitleBlock, Any] = { | ||
| StreamConverters.fromInputStream(() => new FileInputStream(sourceFilePath)) | ||
| .via(frameByEmptyLine) | ||
| .map(each => each.utf8String) | ||
| .map(each => convertTo(each)) | ||
| } | ||
|
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| def runSync(): Seq[SubtitleBlock] = { | ||
| val resultFut = source.runWith(Sink.seq) | ||
| Await.result(resultFut, 10.seconds) | ||
| } | ||
| } | ||
|
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| object SrtParser extends App { | ||
| val logger: Logger = LoggerFactory.getLogger(this.getClass) | ||
| val parser = new SrtParser("src/main/resources/EN_challenges.srt") | ||
| val result = parser.runSync() | ||
| logger.info(s"File contains: ${result.size} SubtitleBlock(s)") | ||
| logger.info(s"Blocks: $result") | ||
|
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| def apply(sourceFilePath: String): SrtParser = new SrtParser(sourceFilePath) | ||
| } | ||
|
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| case class SubtitleBlock(start: Long, end: Long, lines: Seq[String]) { | ||
| val logger: Logger = LoggerFactory.getLogger(this.getClass) | ||
| val ls = sys.props("line.separator") | ||
|
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| def allLines: String = lines.mkString(" ") | ||
|
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| def allLinesEnd: String = allLines + ls + ls | ||
|
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| def formatOutBlock(blockCounter: Long): String = { | ||
| // Spec: https://wiki.videolan.org/SubRip | ||
| val outputFormatted = s"$blockCounter$ls${toTime(start)} --> ${toTime(end)}$ls${lines.mkString("\n")}$ls$ls" | ||
| logger.info(s"Writing block:$ls {}", outputFormatted) | ||
| outputFormatted | ||
| } | ||
|
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| private def toTime(ms: Long) = { | ||
| val d = Duration.ofMillis(ms) | ||
| val hours = StringUtils.leftPad(d.toHoursPart.toString, 2, "0") | ||
| val minutes = StringUtils.leftPad(d.toMinutesPart.toString, 2, "0") | ||
| val seconds = StringUtils.leftPad(d.toSecondsPart.toString, 2, "0") | ||
| val milliSeconds = StringUtils.leftPad(d.toMillisPart.toString, 3, "0") | ||
| s"$hours:$minutes:$seconds,$milliSeconds" | ||
| } | ||
| } |
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