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Fix discarding upstream from DefaultTrackOutput

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-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=158837777
This commit is contained in:
olly 2017-06-13 06:19:59 -07:00 committed by Oliver Woodman
parent 0c1212b309
commit fb12a659a2
2 changed files with 77 additions and 3 deletions
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76
library/core/src/androidTest/java/com/google/android/exoplayer2/extractor/DefaultTrackOutputTest.java
View File

@ -251,6 +251,68 @@ public class DefaultTrackOutputTest extends TestCase {
assertNoSamplesToRead(TEST_FORMAT_2);
}
public void testDiscardUpstream() {
writeTestData();
trackOutput.discardUpstreamSamples(8);
assertAllocationCount(10);
trackOutput.discardUpstreamSamples(7);
assertAllocationCount(9);
trackOutput.discardUpstreamSamples(6);
assertAllocationCount(8); // Byte not belonging to sample prevents 7.
trackOutput.discardUpstreamSamples(5);
assertAllocationCount(5);
trackOutput.discardUpstreamSamples(4);
assertAllocationCount(4);
trackOutput.discardUpstreamSamples(3);
assertAllocationCount(3);
trackOutput.discardUpstreamSamples(2);
assertAllocationCount(3); // Byte not belonging to sample prevents 2.
trackOutput.discardUpstreamSamples(1);
assertAllocationCount(2); // Byte not belonging to sample prevents 1.
trackOutput.discardUpstreamSamples(0);
assertAllocationCount(1); // Byte not belonging to sample prevents 0.
assertReadFormat(false, TEST_FORMAT_2);
assertNoSamplesToRead(TEST_FORMAT_2);
}
public void testDiscardUpstreamMulti() {
writeTestData();
trackOutput.discardUpstreamSamples(4);
assertAllocationCount(4);
trackOutput.discardUpstreamSamples(0);
assertAllocationCount(1); // Byte not belonging to sample prevents 0.
assertReadFormat(false, TEST_FORMAT_2);
assertNoSamplesToRead(TEST_FORMAT_2);
}
public void testDiscardUpstreamBeforeRead() {
writeTestData();
trackOutput.discardUpstreamSamples(4);
assertAllocationCount(4);
assertReadTestData(null, 0, 4);
assertReadFormat(false, TEST_FORMAT_2);
assertNoSamplesToRead(TEST_FORMAT_2);
}
public void testDiscardUpstreamAfterRead() {
writeTestData();
assertReadTestData(null, 0, 3);
trackOutput.discardUpstreamSamples(8);
assertAllocationCount(7);
trackOutput.discardUpstreamSamples(7);
assertAllocationCount(6);
trackOutput.discardUpstreamSamples(6);
assertAllocationCount(5); // Byte not belonging to sample prevents 4.
trackOutput.discardUpstreamSamples(5);
assertAllocationCount(2);
trackOutput.discardUpstreamSamples(4);
assertAllocationCount(1);
trackOutput.discardUpstreamSamples(3);
assertAllocationCount(0);
assertReadFormat(false, TEST_FORMAT_2);
assertNoSamplesToRead(TEST_FORMAT_2);
}
// Internal methods.
/**
@ -293,8 +355,20 @@ public class DefaultTrackOutputTest extends TestCase {
* @param firstSampleIndex The index of the first sample that's expected to be read.
*/
private void assertReadTestData(Format startFormat, int firstSampleIndex) {
assertReadTestData(startFormat, firstSampleIndex,
TEST_SAMPLE_TIMESTAMPS.length - firstSampleIndex);
}
/**
* Asserts correct reading of standard test data from {@code trackOutput}.
*
* @param startFormat The format of the last sample previously read from {@code trackOutput}.
* @param firstSampleIndex The index of the first sample that's expected to be read.
* @param sampleCount The number of samples to read.
*/
private void assertReadTestData(Format startFormat, int firstSampleIndex, int sampleCount) {
Format format = startFormat;
for (int i = firstSampleIndex; i < TEST_SAMPLE_TIMESTAMPS.length; i++) {
for (int i = firstSampleIndex; i < firstSampleIndex + sampleCount; i++) {
// Use equals() on the read side despite using referential equality on the write side, since
// trackOutput de-duplicates written formats using equals().
if (!TEST_SAMPLE_FORMATS[i].equals(format)) {

4
library/core/src/main/java/com/google/android/exoplayer2/extractor/SampleMetadataQueue.java
View File

@ -111,8 +111,8 @@ import com.google.android.exoplayer2.util.Util;
Assertions.checkArgument(0 <= discardCount && discardCount <= length);
if (discardCount == 0) {
if (absoluteStartIndex == 0) {
// length == absoluteStartIndex == 0, so nothing has been written to the queue.
if (absoluteStartIndex == 0 && length == 0) {
// Nothing has been written to the queue.
return 0;
}
int lastWriteIndex = (relativeEndIndex == 0 ? capacity : relativeEndIndex) - 1;