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Merge pull request #7968 from DolbyLaboratories:dev-v2-channelConfiguration

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PiperOrigin-RevId: 333485323
This commit is contained in:
kim-vde 2020-09-25 16:31:49 +01:00 committed by Oliver Woodman
parent 30be792a15
commit 31251a40c1
1 changed files with 41 additions and 7 deletions
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48
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java
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@ -70,6 +70,16 @@ public class DashManifestParser extends DefaultHandler
private static final Pattern CEA_708_ACCESSIBILITY_PATTERN =
Pattern.compile("([1-9]|[1-5][0-9]|6[0-3])=.*");
/**
* Maps the value attribute of an AudioElementConfiguration with schemeIdUri
* "urn:mpeg:mpegB:cicp:ChannelConfiguration", as defined by ISO 23001-8 clause 8.1, to a channel
* count.
*/
private static final int[] MPEG_CHANNEL_CONFIGURATION_MAPPING =
new int[] {
Format.NO_VALUE, 1, 2, 3, 4, 5, 6, 8, 2, 3, 4, 7, 8, 24, 8, 12, 10, 12, 14, 12, 14
};
private final XmlPullParserFactory xmlParserFactory;
public DashManifestParser() {
@ -1156,13 +1166,22 @@ public class DashManifestParser extends DefaultHandler
protected int parseAudioChannelConfiguration(XmlPullParser xpp)
throws XmlPullParserException, IOException {
String schemeIdUri = parseString(xpp, "schemeIdUri", null);
int audioChannels =
"urn:mpeg:dash:23003:3:audio_channel_configuration:2011".equals(schemeIdUri)
? parseInt(xpp, "value", Format.NO_VALUE)
: ("tag:dolby.com,2014:dash:audio_channel_configuration:2011".equals(schemeIdUri)
|| "urn:dolby:dash:audio_channel_configuration:2011".equals(schemeIdUri)
? parseDolbyChannelConfiguration(xpp)
: Format.NO_VALUE);
int audioChannels;
switch (schemeIdUri) {
case "urn:mpeg:dash:23003:3:audio_channel_configuration:2011":
audioChannels = parseInt(xpp, "value", Format.NO_VALUE);
break;
case "urn:mpeg:mpegB:cicp:ChannelConfiguration":
audioChannels = parseMpegChannelConfiguration(xpp);
break;
case "tag:dolby.com,2014:dash:audio_channel_configuration:2011":
case "urn:dolby:dash:audio_channel_configuration:2011":
audioChannels = parseDolbyChannelConfiguration(xpp);
break;
default:
audioChannels = Format.NO_VALUE;
break;
}
do {
xpp.next();
} while (!XmlPullParserUtil.isEndTag(xpp, "AudioChannelConfiguration"));
@ -1528,6 +1547,21 @@ public class DashManifestParser extends DefaultHandler
return value == null ? defaultValue : value;
}
/**
* Parses the number of channels from the value attribute of an AudioElementConfiguration with
* schemeIdUri "urn:mpeg:mpegB:cicp:ChannelConfiguration", as defined by ISO 23001-8 clause 8.1.
*
* @param xpp The parser from which to read.
* @return The parsed number of channels, or {@link Format#NO_VALUE} if the channel count could
* not be parsed.
*/
protected static int parseMpegChannelConfiguration(XmlPullParser xpp) {
int index = parseInt(xpp, "value", C.INDEX_UNSET);
return 0 <= index && index < MPEG_CHANNEL_CONFIGURATION_MAPPING.length
? MPEG_CHANNEL_CONFIGURATION_MAPPING[index]
: Format.NO_VALUE;
}
/**
* Parses the number of channels from the value attribute of an AudioElementConfiguration with
* schemeIdUri "tag:dolby.com,2014:dash:audio_channel_configuration:2011", as defined by table E.5