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Fix 2 CEA decoder bugs

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1- Avoid dropped buffers by using a PriorityQueue instead of a set.
2- Process the end of stream after non-EOS buffers.

Issue:#3250

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=169077365
This commit is contained in:
aquilescanta 2017-09-18 05:44:31 -07:00 committed by Oliver Woodman
parent 8d739067ec
commit 5e2c7d967a
3 changed files with 13 additions and 12 deletions
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3
library/core/src/main/java/com/google/android/exoplayer2/text/SubtitleInputBuffer.java
View File

@ -37,6 +37,9 @@ public final class SubtitleInputBuffer extends DecoderInputBuffer
@Override
public int compareTo(@NonNull SubtitleInputBuffer other) {
if (isEndOfStream() != other.isEndOfStream()) {
return isEndOfStream() ? 1 : -1;
}
long delta = timeUs - other.timeUs;
if (delta == 0) {
return 0;

8
library/core/src/main/java/com/google/android/exoplayer2/text/TextRenderer.java
View File

@ -37,7 +37,7 @@ import java.util.List;
* <p>
* {@link Subtitle}s are decoded from sample data using {@link SubtitleDecoder} instances obtained
* from a {@link SubtitleDecoderFactory}. The actual rendering of the subtitle {@link Cue}s is
* delegated to an {@link TextOutput}.
* delegated to a {@link TextOutput}.
*/
public final class TextRenderer extends BaseRenderer implements Callback {
@ -291,9 +291,9 @@ public final class TextRenderer extends BaseRenderer implements Callback {
}
private long getNextEventTime() {
return ((nextSubtitleEventIndex == C.INDEX_UNSET)
|| (nextSubtitleEventIndex >= subtitle.getEventTimeCount())) ? Long.MAX_VALUE
: (subtitle.getEventTime(nextSubtitleEventIndex));
return nextSubtitleEventIndex == C.INDEX_UNSET
|| nextSubtitleEventIndex >= subtitle.getEventTimeCount()
? Long.MAX_VALUE : subtitle.getEventTime(nextSubtitleEventIndex);
}
private void updateOutput(List<Cue> cues) {

14
library/core/src/main/java/com/google/android/exoplayer2/text/cea/CeaDecoder.java
View File

@ -24,7 +24,7 @@ import com.google.android.exoplayer2.text.SubtitleInputBuffer;
import com.google.android.exoplayer2.text.SubtitleOutputBuffer;
import com.google.android.exoplayer2.util.Assertions;
import java.util.LinkedList;
import java.util.TreeSet;
import java.util.PriorityQueue;
/**
* Base class for subtitle parsers for CEA captions.
@ -36,7 +36,7 @@ import java.util.TreeSet;
private final LinkedList<SubtitleInputBuffer> availableInputBuffers;
private final LinkedList<SubtitleOutputBuffer> availableOutputBuffers;
private final TreeSet<SubtitleInputBuffer> queuedInputBuffers;
private final PriorityQueue<SubtitleInputBuffer> queuedInputBuffers;
private SubtitleInputBuffer dequeuedInputBuffer;
private long playbackPositionUs;
@ -50,7 +50,7 @@ import java.util.TreeSet;
for (int i = 0; i < NUM_OUTPUT_BUFFERS; i++) {
availableOutputBuffers.add(new CeaOutputBuffer(this));
}
queuedInputBuffers = new TreeSet<>();
queuedInputBuffers = new PriorityQueue<>();
}
@Override
@ -73,7 +73,6 @@ import java.util.TreeSet;
@Override
public void queueInputBuffer(SubtitleInputBuffer inputBuffer) throws SubtitleDecoderException {
Assertions.checkArgument(inputBuffer != null);
Assertions.checkArgument(inputBuffer == dequeuedInputBuffer);
if (inputBuffer.isDecodeOnly()) {
// We can drop this buffer early (i.e. before it would be decoded) as the CEA formats allow
@ -90,13 +89,12 @@ import java.util.TreeSet;
if (availableOutputBuffers.isEmpty()) {
return null;
}
// iterate through all available input buffers whose timestamps are less than or equal
// to the current playback position; processing input buffers for future content should
// be deferred until they would be applicable
while (!queuedInputBuffers.isEmpty()
&& queuedInputBuffers.first().timeUs <= playbackPositionUs) {
SubtitleInputBuffer inputBuffer = queuedInputBuffers.pollFirst();
&& queuedInputBuffers.peek().timeUs <= playbackPositionUs) {
SubtitleInputBuffer inputBuffer = queuedInputBuffers.poll();
// If the input buffer indicates we've reached the end of the stream, we can
// return immediately with an output buffer propagating that
@ -142,7 +140,7 @@ import java.util.TreeSet;
public void flush() {
playbackPositionUs = 0;
while (!queuedInputBuffers.isEmpty()) {
releaseInputBuffer(queuedInputBuffers.pollFirst());
releaseInputBuffer(queuedInputBuffers.poll());
}
if (dequeuedInputBuffer != null) {
releaseInputBuffer(dequeuedInputBuffer);