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Prevent wrapping detection on new passthrough AudioTracks.

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This commit is contained in:
Oliver Woodman 2015-05-08 17:03:05 +01:00
parent de5bce3400
commit a1083d360a
1 changed files with 9 additions and 3 deletions
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12
library/src/main/java/com/google/android/exoplayer/audio/AudioTrack.java
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@ -790,9 +790,15 @@ public final class AudioTrack {
public long getPlaybackHeadPosition() {
long rawPlaybackHeadPosition = 0xFFFFFFFFL & audioTrack.getPlaybackHeadPosition();
if (Util.SDK_INT <= 22 && isPassthrough) {
// Work around an issue on platform API versions 21/22 where the playback head position
// jumps back to zero on paused passthrough/direct audio tracks. See [Internal: b/19187573].
if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED
// Work around issues with passthrough/direct AudioTracks on platform API versions 21/22:
// - After resetting, the new AudioTrack's playback position continues to increase for a
// short time from the old AudioTrack's position, while in the PLAYSTATE_STOPPED state.
// - The playback head position jumps back to zero on paused passthrough/direct audio
// tracks. See [Internal: b/19187573].
if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_STOPPED) {
// Prevent detecting a wrapped position.
lastRawPlaybackHeadPosition = rawPlaybackHeadPosition;
} else if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED
&& rawPlaybackHeadPosition == 0) {
passthroughWorkaroundPauseOffset = lastRawPlaybackHeadPosition;
}