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Remove caption parser strict modes.

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They don't seem particularly useful; they don't technically force
strict compliance, but rather just catch a few token things in
each case. Furthermore, for playback, probably the right thing to
do is to always turn strict mode off.
This commit is contained in:
Oliver Woodman 2015-11-25 16:49:25 +00:00
parent 4fbe4fc7d5
commit f11a204b4a
6 changed files with 34 additions and 121 deletions
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38
library/src/androidTest/java/com/google/android/exoplayer/text/subrip/SubripParserTest.java
View File

@ -15,8 +15,6 @@
*/
package com.google.android.exoplayer.text.subrip;
import com.google.android.exoplayer.ParserException;
import android.test.InstrumentationTestCase;
import java.io.IOException;
@ -35,7 +33,7 @@ public final class SubripParserTest extends InstrumentationTestCase {
private static final String NO_END_TIMECODES_FILE = "subrip/no_end_timecodes";
public void testParseEmpty() throws IOException {
SubripParser parser = new SubripParser(true);
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(EMPTY_FILE);
SubripSubtitle subtitle = parser.parse(inputStream);
// Assert that the subtitle is empty.
@ -44,7 +42,7 @@ public final class SubripParserTest extends InstrumentationTestCase {
}
public void testParseTypical() throws IOException {
SubripParser parser = new SubripParser(true);
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(TYPICAL_FILE);
SubripSubtitle subtitle = parser.parse(inputStream);
assertEquals(6, subtitle.getEventTimeCount());
@ -54,7 +52,7 @@ public final class SubripParserTest extends InstrumentationTestCase {
}
public void testParseTypicalExtraBlankLine() throws IOException {
SubripParser parser = new SubripParser(true);
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(TYPICAL_EXTRA_BLANK_LINE);
SubripSubtitle subtitle = parser.parse(inputStream);
assertEquals(6, subtitle.getEventTimeCount());
@ -64,19 +62,9 @@ public final class SubripParserTest extends InstrumentationTestCase {
}
public void testParseTypicalMissingTimecode() throws IOException {
// Strict parsing should fail.
SubripParser parser = new SubripParser(true);
// Parsing should succeed, parsing the first and third cues only.
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(TYPICAL_MISSING_TIMECODE);
try {
parser.parse(inputStream);
fail();
} catch (ParserException e) {
// Expected.
}
// Non-strict parsing should succeed, parsing the first and third cues only.
parser = new SubripParser(false);
inputStream = getInputStream(TYPICAL_MISSING_TIMECODE);
SubripSubtitle subtitle = parser.parse(inputStream);
assertEquals(4, subtitle.getEventTimeCount());
assertTypicalCue1(subtitle, 0);
@ -84,19 +72,9 @@ public final class SubripParserTest extends InstrumentationTestCase {
}
public void testParseTypicalMissingSequence() throws IOException {
// Strict parsing should fail.
SubripParser parser = new SubripParser(true);
// Parsing should succeed, parsing the first and third cues only.
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(TYPICAL_MISSING_SEQUENCE);
try {
parser.parse(inputStream);
fail();
} catch (ParserException e) {
// Expected.
}
// Non-strict parsing should succeed, parsing the first and third cues only.
parser = new SubripParser(false);
inputStream = getInputStream(TYPICAL_MISSING_SEQUENCE);
SubripSubtitle subtitle = parser.parse(inputStream);
assertEquals(4, subtitle.getEventTimeCount());
assertTypicalCue1(subtitle, 0);
@ -104,7 +82,7 @@ public final class SubripParserTest extends InstrumentationTestCase {
}
public void testParseNoEndTimecodes() throws IOException {
SubripParser parser = new SubripParser(true);
SubripParser parser = new SubripParser();
InputStream inputStream = getInputStream(NO_END_TIMECODES_FILE);
SubripSubtitle subtitle = parser.parse(inputStream);

3
library/src/androidTest/java/com/google/android/exoplayer/text/ttml/TtmlParserTest.java
View File

@ -470,10 +470,9 @@ public final class TtmlParserTest extends InstrumentationTestCase {
}
private TtmlSubtitle getSubtitle(String file) throws IOException {
TtmlParser ttmlParser = new TtmlParser(false);
TtmlParser ttmlParser = new TtmlParser();
InputStream inputStream = getInstrumentation().getContext()
.getResources().getAssets().open(file);
return (TtmlSubtitle) ttmlParser.parse(inputStream);
}
}

32
library/src/main/java/com/google/android/exoplayer/text/subrip/SubripParser.java
View File

@ -16,7 +16,6 @@
package com.google.android.exoplayer.text.subrip;
import com.google.android.exoplayer.C;
import com.google.android.exoplayer.ParserException;
import com.google.android.exoplayer.text.Cue;
import com.google.android.exoplayer.text.SubtitleParser;
import com.google.android.exoplayer.util.LongArray;
@ -47,24 +46,14 @@ public final class SubripParser implements SubtitleParser {
Pattern.compile("(?:(\\d+):)?(\\d+):(\\d+),(\\d+)");
private final StringBuilder textBuilder;
private final boolean strictParsing;
/**
* Equivalent to {@code SubripParser(false)}.
*/
public SubripParser() {
this(false);
textBuilder = new StringBuilder();
}
/**
* @param strictParsing If true, {@link #parse(InputStream)} will throw a {@link ParserException}
* if the stream contains invalid data. If false, the parser will make a best effort to ignore
* minor errors in the stream. Note however that a {@link ParserException} will still be
* thrown when this is not possible.
*/
public SubripParser(boolean strictParsing) {
this.strictParsing = strictParsing;
textBuilder = new StringBuilder();
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_SUBRIP.equals(mimeType);
}
@Override
@ -85,12 +74,8 @@ public final class SubripParser implements SubtitleParser {
try {
Integer.parseInt(currentLine);
} catch (NumberFormatException e) {
if (!strictParsing) {
Log.w(TAG, "Skipping invalid index: " + currentLine);
continue;
} else {
throw new ParserException("Expected numeric counter: " + currentLine);
}
}
// Read and parse the timing line.
@ -104,11 +89,9 @@ public final class SubripParser implements SubtitleParser {
haveEndTimecode = true;
cueTimesUs.add(parseTimecode(matcher.group(2)));
}
} else if (!strictParsing) {
} else {
Log.w(TAG, "Skipping invalid timing: " + currentLine);
continue;
} else {
throw new ParserException("Expected timing line: " + currentLine);
}
// Read and parse the text.
@ -133,11 +116,6 @@ public final class SubripParser implements SubtitleParser {
return new SubripSubtitle(cuesArray, cueTimesUsArray);
}
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_SUBRIP.equals(mimeType);
}
private static long parseTimecode(String s) throws NumberFormatException {
Matcher matcher = SUBRIP_TIMESTAMP.matcher(s);
if (!matcher.matches()) {

29
library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlParser.java
View File

@ -82,23 +82,8 @@ public final class TtmlParser implements SubtitleParser {
private static final int DEFAULT_TICKRATE = 1;
private final XmlPullParserFactory xmlParserFactory;
private final boolean strictParsing;
/**
* Equivalent to {@code TtmlParser(false)}.
*/
public TtmlParser() {
this(false);
}
/**
* @param strictParsing If true, {@link #parse(InputStream)} will throw a {@link ParserException}
* if the stream contains invalid data. If false, the parser will make a best effort to ignore
* minor errors in the stream. Note however that a {@link ParserException} will still be
* thrown when this is not possible.
*/
public TtmlParser(boolean strictParsing) {
this.strictParsing = strictParsing;
try {
xmlParserFactory = XmlPullParserFactory.newInstance();
} catch (XmlPullParserException e) {
@ -106,6 +91,11 @@ public final class TtmlParser implements SubtitleParser {
}
}
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_TTML.equals(mimeType);
}
@Override
public Subtitle parse(InputStream inputStream) throws IOException {
try {
@ -134,15 +124,11 @@ public final class TtmlParser implements SubtitleParser {
parent.addChild(node);
}
} catch (ParserException e) {
if (strictParsing) {
throw e;
} else {
Log.w(TAG, "Suppressing parser error", e);
// Treat the node (and by extension, all of its children) as unsupported.
unsupportedNodeDepth++;
}
}
}
} else if (eventType == XmlPullParser.TEXT) {
parent.addChild(TtmlNode.buildTextNode(xmlParser.getText()));
} else if (eventType == XmlPullParser.END_TAG) {
@ -287,11 +273,6 @@ public final class TtmlParser implements SubtitleParser {
return style == null ? new TtmlStyle() : style;
}
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_TTML.equals(mimeType);
}
private TtmlNode parseNode(XmlPullParser parser, TtmlNode parent) throws ParserException {
long duration = 0;
long startTime = TtmlNode.UNDEFINED_TIME;

10
library/src/main/java/com/google/android/exoplayer/text/tx3g/Tx3gParser.java
View File

@ -31,6 +31,11 @@ import java.io.InputStream;
*/
public final class Tx3gParser implements SubtitleParser {
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_TX3G.equals(mimeType);
}
@Override
public Subtitle parse(InputStream inputStream) throws IOException {
DataInputStream dataInputStream = new DataInputStream(inputStream);
@ -38,9 +43,4 @@ public final class Tx3gParser implements SubtitleParser {
return new Tx3gSubtitle(new Cue(cueText));
}
@Override
public boolean canParse(String mimeType) {
return MimeTypes.APPLICATION_TX3G.equals(mimeType);
}
}

33
library/src/main/java/com/google/android/exoplayer/text/webvtt/WebvttParser.java
View File

@ -44,33 +44,22 @@ public final class WebvttParser implements SubtitleParser {
private static final Pattern HEADER = Pattern.compile("^\uFEFF?WEBVTT((\u0020|\u0009).*)?$");
private static final Pattern COMMENT_BLOCK = Pattern.compile("^NOTE((\u0020|\u0009).*)?$");
private static final Pattern METADATA_HEADER = Pattern.compile("\\S*[:=]\\S*");
private static final Pattern CUE_HEADER = Pattern.compile("^(\\S+)\\s+-->\\s+(\\S+)(.*)?$");
private static final Pattern CUE_SETTING = Pattern.compile("\\S+?:\\S+");
private final PositionHolder positionHolder;
private final StringBuilder textBuilder;
private final boolean strictParsing;
/**
* Equivalent to {@code WebvttParser(false)}.
*/
public WebvttParser() {
this(false);
}
/**
* @param strictParsing If true, {@link #parse(InputStream)} will throw a {@link ParserException}
* if the stream contains invalid data. If false, the parser will make a best effort to ignore
* minor errors in the stream. Note however that a {@link ParserException} will still be
* thrown when this is not possible.
*/
public WebvttParser(boolean strictParsing) {
this.strictParsing = strictParsing;
positionHolder = new PositionHolder();
textBuilder = new StringBuilder();
}
@Override
public final boolean canParse(String mimeType) {
return MimeTypes.TEXT_VTT.equals(mimeType);
}
@Override
public final WebvttSubtitle parse(InputStream inputStream) throws IOException {
ArrayList<WebvttCue> subtitles = new ArrayList<>();
@ -94,13 +83,6 @@ public final class WebvttParser implements SubtitleParser {
// We read the newline that separates the header from the body.
break;
}
if (strictParsing) {
Matcher matcher = METADATA_HEADER.matcher(line);
if (!matcher.find()) {
throw new ParserException("Unexpected line: " + line);
}
}
}
// Process the cues and text.
@ -187,11 +169,6 @@ public final class WebvttParser implements SubtitleParser {
return new WebvttSubtitle(subtitles);
}
@Override
public final boolean canParse(String mimeType) {
return MimeTypes.TEXT_VTT.equals(mimeType);
}
private static long parseTimestampUs(String s) throws NumberFormatException {
long value = 0;
String[] parts = s.split("\\.", 2);