com.google.android.exoplayer2.text.webvtt

Class WebvttParserUtil

java.lang.Object

com.google.android.exoplayer2.text.webvtt.WebvttParserUtil

public final class WebvttParserUtil
extends java.lang.Object

Utility methods for parsing WebVTT data.

Method Summary

Modifier and Type	Method and Description
static java.util.regex.Matcher	findNextCueHeader(ParsableByteArray input) Reads lines up to and including the next WebVTT cue header.
static float	parsePercentage(java.lang.String s) Parses a percentage string.
static long	parseTimestampUs(java.lang.String timestamp) Parses a WebVTT timestamp.
static void	validateWebvttHeaderLine(ParsableByteArray input) Reads and validates the first line of a WebVTT file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

validateWebvttHeaderLine

public static void validateWebvttHeaderLine(ParsableByteArray input)
                                     throws SubtitleDecoderException

Reads and validates the first line of a WebVTT file.

Parameters:

input - The input from which the line should be read.

Throws:

SubtitleDecoderException - If the line isn't the start of a valid WebVTT file.

parseTimestampUs

public static long parseTimestampUs(java.lang.String timestamp)
                             throws java.lang.NumberFormatException

Parses a WebVTT timestamp.

Parameters:

timestamp - The timestamp string.

Returns:

The parsed timestamp in microseconds.

Throws:

java.lang.NumberFormatException - If the timestamp could not be parsed.

parsePercentage

public static float parsePercentage(java.lang.String s)
                             throws java.lang.NumberFormatException

Parses a percentage string.

Parameters:

s - The percentage string.

Returns:

The parsed value, where 1.0 represents 100%.

Throws:

java.lang.NumberFormatException - If the percentage could not be parsed.

findNextCueHeader

public static java.util.regex.Matcher findNextCueHeader(ParsableByteArray input)

Reads lines up to and including the next WebVTT cue header.

Parameters:

input - The input from which lines should be read.

Returns:

A Matcher for the WebVTT cue header, or null if the end of the input was reached without a cue header being found. In the case that a cue header is found, groups 1, 2 and 3 of the returned matcher contain the start time, end time and settings list.