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FMP4: Correctly handle multiple sbgp and sgpd boxes

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Find sbgp and sgpd boxes with grouping_type == seig in the case they don't
come first. Previoulsy we would only find them if they came first.

Issue: Issue: #7716
PiperOrigin-RevId: 325407819
This commit is contained in:
olly 2020-08-07 11:23:42 +01:00 committed by kim-vde
parent b9612bc338
commit 6a54ddd217
2 changed files with 33 additions and 24 deletions
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2
RELEASENOTES.md
View file

@ -215,6 +215,8 @@
([#7230](https://github.com/google/ExoPlayer/issues/7230)).
* MP4: Fix playback of MP4 containing Opus.
* Matroska: Remove support for "Invisible" block header flag.
* FMP4: Fix handling of `traf` boxes containing multiple `sbgp` or `sgpd`
boxes.
* FLV: Ignore SCRIPTDATA segments with invalid name types, rather than failing
playback ([#7675](https://github.com/google/ExoPlayer/issues/7675)).
* Extractors:

55
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/FragmentedMp4Extractor.java
View file

@ -752,12 +752,7 @@ public class FragmentedMp4Extractor implements Extractor {
parseSenc(senc.data, fragment);
}
@Nullable LeafAtom sbgp = traf.getLeafAtomOfType(Atom.TYPE_sbgp);
@Nullable LeafAtom sgpd = traf.getLeafAtomOfType(Atom.TYPE_sgpd);
if (sbgp != null && sgpd != null) {
parseSgpd(sbgp.data, sgpd.data, encryptionBox != null ? encryptionBox.schemeType : null,
fragment);
}
parseSampleGroups(traf, encryptionBox != null ? encryptionBox.schemeType : null, fragment);
int leafChildrenSize = traf.leafChildren.size();
for (int i = 0; i < leafChildrenSize; i++) {
@ -1099,32 +1094,43 @@ public class FragmentedMp4Extractor implements Extractor {
out.fillEncryptionData(senc);
}
private static void parseSgpd(
ParsableByteArray sbgp,
ParsableByteArray sgpd,
@Nullable String schemeType,
TrackFragment out)
throws ParserException {
sbgp.setPosition(Atom.HEADER_SIZE);
int sbgpFullAtom = sbgp.readInt();
if (sbgp.readInt() != SAMPLE_GROUP_TYPE_seig) {
// Only seig grouping type is supported.
private static void parseSampleGroups(
ContainerAtom traf, @Nullable String schemeType, TrackFragment out) throws ParserException {
// Find sbgp and sgpd boxes with grouping_type == seig.
@Nullable ParsableByteArray sbgp = null;
@Nullable ParsableByteArray sgpd = null;
for (int i = 0; i < traf.leafChildren.size(); i++) {
LeafAtom leafAtom = traf.leafChildren.get(i);
ParsableByteArray leafAtomData = leafAtom.data;
if (leafAtom.type == Atom.TYPE_sbgp) {
leafAtomData.setPosition(Atom.FULL_HEADER_SIZE);
if (leafAtomData.readInt() == SAMPLE_GROUP_TYPE_seig) {
sbgp = leafAtomData;
}
} else if (leafAtom.type == Atom.TYPE_sgpd) {
leafAtomData.setPosition(Atom.FULL_HEADER_SIZE);
if (leafAtomData.readInt() == SAMPLE_GROUP_TYPE_seig) {
sgpd = leafAtomData;
}
}
}
if (sbgp == null || sgpd == null) {
return;
}
if (Atom.parseFullAtomVersion(sbgpFullAtom) == 1) {
sbgp.skipBytes(4); // default_length.
sbgp.setPosition(Atom.HEADER_SIZE);
int sbgpVersion = Atom.parseFullAtomVersion(sbgp.readInt());
sbgp.skipBytes(4); // grouping_type == seig.
if (sbgpVersion == 1) {
sbgp.skipBytes(4); // grouping_type_parameter.
}
if (sbgp.readInt() != 1) { // entry_count.
throw new ParserException("Entry count in sbgp != 1 (unsupported).");
}
sgpd.setPosition(Atom.HEADER_SIZE);
int sgpdFullAtom = sgpd.readInt();
if (sgpd.readInt() != SAMPLE_GROUP_TYPE_seig) {
// Only seig grouping type is supported.
return;
}
int sgpdVersion = Atom.parseFullAtomVersion(sgpdFullAtom);
int sgpdVersion = Atom.parseFullAtomVersion(sgpd.readInt());
sgpd.skipBytes(4); // grouping_type == seig.
if (sgpdVersion == 1) {
if (sgpd.readUnsignedInt() == 0) {
throw new ParserException("Variable length description in sgpd found (unsupported)");
@ -1135,6 +1141,7 @@ public class FragmentedMp4Extractor implements Extractor {
if (sgpd.readUnsignedInt() != 1) { // entry_count.
throw new ParserException("Entry count in sgpd != 1 (unsupported).");
}
// CencSampleEncryptionInformationGroupEntry
sgpd.skipBytes(1); // reserved = 0.
int patternByte = sgpd.readUnsignedByte();