TimestampAdjuster

public static final long MODE_NO_OFFSET = 9223372036854775807

A special firstSampleTimestampUs value indicating that presentation timestamps should not be offset. In this mode:

• getFirstSampleTimestampUs will always return TIME_UNSET.
• The only timestamp adjustment performed is to account for MPEG-2 TS timestamp rollover.

public static final long MODE_SHARED = 9223372036854775806

A special firstSampleTimestampUs value indicating that the adjuster will be shared by multiple threads. In this mode:

• getFirstSampleTimestampUs will always return TIME_UNSET.
• Calling threads must call sharedInitializeOrWait prior to adjusting timestamps.

@GuardedBy(value = "this")
public long firstSampleTimestampUs

@GuardedBy(value = "this")
public long timestampOffsetUs

public TimestampAdjuster(long firstSampleTimestampUs)

synchronized public long adjustSampleTimestamp(long timeUs)

Offsets a timestamp in microseconds.

synchronized public long adjustTsTimestamp(long pts90Khz)

Scales and offsets an MPEG-2 TS presentation timestamp considering wraparound.

When estimating the wraparound, the method assumes that this timestamp is close to the previous adjusted timestamp.

synchronized public long adjustTsTimestampGreaterThanPreviousTimestamp(long pts90Khz)

Scales and offsets an MPEG-2 TS presentation timestamp considering wraparound.

When estimating the wraparound, the method assumes that the timestamp is strictly greater than the previous adjusted timestamp.

synchronized public long getFirstSampleTimestampUs()

Returns the value of the first adjusted sample timestamp in microseconds, or TIME_UNSET if timestamps will not be offset or if the adjuster is in shared mode.

synchronized public long getLastAdjustedTimestampUs()

Returns the last adjusted timestamp, in microseconds. If no timestamps have been adjusted yet then the result of getFirstSampleTimestampUs is returned.

synchronized public long getTimestampOffsetUs()

Returns the offset between the input of adjustSampleTimestamp and its output, or TIME_UNSET if the offset has not yet been determined.

synchronized public boolean isInitialized()

Returns whether the instance is initialized with a timestamp offset.

public static long ptsToUs(long pts)

Converts a 90 kHz clock timestamp to a timestamp in microseconds.

synchronized public void reset(long firstSampleTimestampUs)

Resets the instance.

synchronized public void sharedInitializeOrWait(
    boolean canInitialize,
    long nextSampleTimestampUs,
    long timeoutMs
)

For shared timestamp adjusters, performs necessary initialization actions for a caller.

• If the adjuster has already established a timestamp offset then this method is a no-op.
• If canInitialize is true and the adjuster has not yet established a timestamp offset, then the adjuster records the desired first sample timestamp for the calling thread and returns to allow the caller to proceed. If the timestamp offset has still not been established when the caller attempts to adjust its first timestamp, then the recorded timestamp is used to set it.
• If canInitialize is false and the adjuster has not yet established a timestamp offset, then the call blocks until the timestamp offset is set.

public static long usToNonWrappedPts(long us)

Converts a timestamp in microseconds to a 90 kHz clock timestamp.

Does not perform any wraparound. To get a 90 kHz timestamp suitable for use with MPEG-TS, use usToWrappedPts.

public static long usToWrappedPts(long us)

Converts a timestamp in microseconds to a 90 kHz clock timestamp, performing wraparound to keep the result within 33-bits.