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Update MPEG-DASH AudioChannelConfiguration Parsing

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Add support for schemeIdUri="urn:mpeg:mpegB:cicp:ChannelConfiguration".
https://dashif.org/identifiers/audio_source_metadata/ and clause 8.2 in ISO/IEC 23001-8.
This commit is contained in:
ybai001 2020-09-23 14:30:51 +08:00
parent b4658ae6ff
commit 1736e7cc85
1 changed files with 34 additions and 7 deletions
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41
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java
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@ -1279,13 +1279,21 @@ 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 = Format.NO_VALUE;
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:
break;
}
do {
xpp.next();
} while (!XmlPullParserUtil.isEndTag(xpp, "AudioChannelConfiguration"));
@ -1651,6 +1659,25 @@ 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
* https://dashif.org/identifiers/audio_source_metadata/ and clause 8.2, in ISO/IEC 23001-8.
*
* @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 channelIndex = parseInt(xpp, "value", Format.NO_VALUE);
int[] channelCountMapping = new int[]{Format.NO_VALUE, 1, 2, 3, 4, 5, 6, 8, 2, 3, /* 0--9 */
4,7, 8, 24, 8, 12, 10, 12, 14, 12, /* 10--19 */
14 /* 20 */};
return (channelIndex >=0 && channelIndex < channelCountMapping.length)
? channelCountMapping[channelIndex]
: 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