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FragmentedMp4Extractor: Fix clearHeaderSize handling

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PiperOrigin-RevId: 324560994
This commit is contained in:
olly 2020-08-03 09:39:33 +01:00 committed by kim-vde
parent a04769f2d5
commit 42a7083b5c
1 changed files with 5 additions and 6 deletions
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11
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/FragmentedMp4Extractor.java
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@ -1753,14 +1753,13 @@ public class FragmentedMp4Extractor implements Extractor {
// We need to account for the additional clear header by adding clearHeaderSize to
// clearDataSize for the first subsample specified in the subsample encryption data.
scratch.reset(subsampleDataLength);
scratch.readBytes(subsampleEncryptionData.getData(), /* offset= */ 0, subsampleDataLength);
subsampleEncryptionData.skipBytes(subsampleDataLength);
byte[] scratchData = scratch.getData();
subsampleEncryptionData.readBytes(scratchData, /* offset= */ 0, subsampleDataLength);
byte[] data = scratch.getData();
int clearDataSize = (data[2] & 0xFF) << 8 | (data[3] & 0xFF);
int clearDataSize = (scratchData[2] & 0xFF) << 8 | (scratchData[3] & 0xFF);
int adjustedClearDataSize = clearDataSize + clearHeaderSize;
data[2] = (byte) ((adjustedClearDataSize >> 8) & 0xFF);
data[3] = (byte) (adjustedClearDataSize & 0xFF);
scratchData[2] = (byte) ((adjustedClearDataSize >> 8) & 0xFF);
scratchData[3] = (byte) (adjustedClearDataSize & 0xFF);
subsampleEncryptionData = scratch;
}