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Make milliseconds optional in SubRip (SRT) subtitles

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issue:#7122
PiperOrigin-RevId: 303154493
This commit is contained in:
ibaker 2020-03-26 18:17:57 +00:00 committed by Oliver Woodman
parent 47d5dd911c
commit 2842eb3eb4
4 changed files with 14 additions and 9 deletions
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2
RELEASENOTES.md
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@ -86,7 +86,7 @@
([#6885](https://github.com/google/ExoPlayer/issues/6885)).
* Parse `tts:ruby` and `tts:rubyPosition` properties in TTML subtitles
(rendering is coming later).
* Allow missing hours in SubRip (.srt) timecodes
* Allow missing hours & milliseconds in SubRip (.srt) timecodes
([#7122](https://github.com/google/ExoPlayer/issues/7122)).
* DRM:
* Add support for attaching DRM sessions to clear content in the demo app.

9
library/core/src/main/java/com/google/android/exoplayer2/text/subrip/SubripDecoder.java
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@ -41,8 +41,8 @@ public final class SubripDecoder extends SimpleSubtitleDecoder {
private static final String TAG = "SubripDecoder";
// Some SRT files don't include hours in the timecode, so we use an optional group.
private static final String SUBRIP_TIMECODE = "(?:(\\d+):)?(\\d+):(\\d+),(\\d+)";
// Some SRT files don't include hours or milliseconds in the timecode, so we use optional groups.
private static final String SUBRIP_TIMECODE = "(?:(\\d+):)?(\\d+):(\\d+)(?:,(\\d+))?";
private static final Pattern SUBRIP_TIMING_LINE =
Pattern.compile("\\s*(" + SUBRIP_TIMECODE + ")\\s*-->\\s*(" + SUBRIP_TIMECODE + ")\\s*");
@ -235,7 +235,10 @@ public final class SubripDecoder extends SimpleSubtitleDecoder {
long timestampMs = hours != null ? Long.parseLong(hours) * 60 * 60 * 1000 : 0;
timestampMs += Long.parseLong(matcher.group(groupOffset + 2)) * 60 * 1000;
timestampMs += Long.parseLong(matcher.group(groupOffset + 3)) * 1000;
timestampMs += Long.parseLong(matcher.group(groupOffset + 4));
@Nullable String millis = matcher.group(groupOffset + 4);
if (millis != null) {
timestampMs += Long.parseLong(millis);
}
return timestampMs * 1000;
}

10
library/core/src/test/java/com/google/android/exoplayer2/text/subrip/SubripDecoderTest.java
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@ -39,7 +39,7 @@ public final class SubripDecoderTest {
private static final String TYPICAL_NEGATIVE_TIMESTAMPS = "subrip/typical_negative_timestamps";
private static final String TYPICAL_UNEXPECTED_END = "subrip/typical_unexpected_end";
private static final String TYPICAL_WITH_TAGS = "subrip/typical_with_tags";
private static final String TYPICAL_NO_HOURS = "subrip/typical_no_hours";
private static final String TYPICAL_NO_HOURS_AND_MILLIS = "subrip/typical_no_hours_and_millis";
@Test
public void decodeEmpty() throws IOException {
@ -179,15 +179,17 @@ public final class SubripDecoderTest {
}
@Test
public void decodeTypicalNoHours() throws IOException {
public void decodeTypicalNoHoursAndMillis() throws IOException {
SubripDecoder decoder = new SubripDecoder();
byte[] bytes =
TestUtil.getByteArray(ApplicationProvider.getApplicationContext(), TYPICAL_NO_HOURS);
TestUtil.getByteArray(
ApplicationProvider.getApplicationContext(), TYPICAL_NO_HOURS_AND_MILLIS);
Subtitle subtitle = decoder.decode(bytes, bytes.length, false);
assertThat(subtitle.getEventTimeCount()).isEqualTo(6);
assertTypicalCue1(subtitle, 0);
assertTypicalCue2(subtitle, 2);
assertThat(subtitle.getEventTime(2)).isEqualTo(2_000_000);
assertThat(subtitle.getEventTime(3)).isEqualTo(3_000_000);
assertTypicalCue3(subtitle, 4);
}

2
testdata/src/test/assets/subrip/typical_no_hours → testdata/src/test/assets/subrip/typical_no_hours_and_millis vendored
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@ -3,7 +3,7 @@
This is the first subtitle.
2
00:02,345 --> 00:03,456
00:00:02 --> 00:00:03
This is the second subtitle.
Second subtitle with second line.