Class OpusUtil
- java.lang.Object
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- com.google.android.exoplayer2.audio.OpusUtil
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public class OpusUtil extends Object
Utility methods for handling Opus audio streams.
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Field Summary
Fields Modifier and Type Field Description static int
SAMPLE_RATE
Opus streams are always 48000 Hz.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static List<byte[]>
buildInitializationData(byte[] header)
Builds codec initialization data from an Opus Identification Header.static int
getChannelCount(byte[] header)
Parses the channel count from an Opus Identification Header.static int
getPreSkipSamples(List<byte[]> initializationData)
Returns the number of pre-skip samples specified by the given Opus codec initialization data.static int
getSeekPreRollSamples(List<byte[]> initializationData)
Returns the number of seek per-roll samples specified by the given Opus codec initialization data.
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Field Detail
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SAMPLE_RATE
public static final int SAMPLE_RATE
Opus streams are always 48000 Hz.- See Also:
- Constant Field Values
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Method Detail
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getChannelCount
public static int getChannelCount(byte[] header)
Parses the channel count from an Opus Identification Header.- Parameters:
header
- An Opus Identification Header, as defined by RFC 7845.- Returns:
- The parsed channel count.
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buildInitializationData
public static List<byte[]> buildInitializationData(byte[] header)
Builds codec initialization data from an Opus Identification Header.- Parameters:
header
- An Opus Identification Header, as defined by RFC 7845.- Returns:
- Codec initialization data suitable for an Opus MediaCodec.
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getPreSkipSamples
public static int getPreSkipSamples(List<byte[]> initializationData)
Returns the number of pre-skip samples specified by the given Opus codec initialization data.- Parameters:
initializationData
- The codec initialization data.- Returns:
- The number of pre-skip samples.
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getSeekPreRollSamples
public static int getSeekPreRollSamples(List<byte[]> initializationData)
Returns the number of seek per-roll samples specified by the given Opus codec initialization data.- Parameters:
initializationData
- The codec initialization data.- Returns:
- The number of seek pre-roll samples.
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