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Count buffer ahead periods rather than using their indices.

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This is in preparation for allowing MediaSources to skip over periods when one
period ends, which is needed for starting to play a multi-period live stream
that is concatenated on to another period at the live edge.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=128674659
This commit is contained in:
andrewlewis 2016-07-28 01:22:09 -07:00 committed by Oliver Woodman
parent 5818409f4e
commit dfdb3bbc95
1 changed files with 12 additions and 2 deletions
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14
library/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java
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@ -612,6 +612,8 @@ import java.util.ArrayList;
public boolean isReady;
public boolean isEnded;
private int bufferAheadPeriodCount;
private Period playingPeriod;
private Period readingPeriod;
private Period loadingPeriod;
@ -693,6 +695,7 @@ import java.util.ArrayList;
Period previousPeriod = playingPeriod;
boolean seenReadingPeriod = false;
bufferAheadPeriodCount = 0;
while (previousPeriod.nextPeriod != null) {
Period period = previousPeriod.nextPeriod;
index++;
@ -716,6 +719,7 @@ import java.util.ArrayList;
break;
}
bufferAheadPeriodCount++;
period.index = index;
period.isLast = timeline.isFinal() && index == periodCount - 1;
if (period == readingPeriod) {
@ -729,6 +733,7 @@ import java.util.ArrayList;
if (index == Timeline.NO_PERIOD_INDEX) {
loadingPeriod.release();
loadingPeriod = null;
bufferAheadPeriodCount = 0;
} else {
int periodCount = timeline.getPeriodCount();
loadingPeriod.index = index;
@ -758,8 +763,7 @@ import java.util.ArrayList;
// Update the loading period.
if (loadingPeriod == null || (loadingPeriod.isFullyBuffered() && !loadingPeriod.isLast
&& (playingPeriod == null || loadingPeriod.index - playingPeriod.index
< MAXIMUM_BUFFER_AHEAD_PERIODS))) {
&& bufferAheadPeriodCount < MAXIMUM_BUFFER_AHEAD_PERIODS)) {
// Try to obtain the next period to start loading.
int periodIndex = loadingPeriod == null ? playbackInfo.periodIndex
: loadingPeriod.index + 1;
@ -772,6 +776,7 @@ import java.util.ArrayList;
if (loadingPeriod != null) {
loadingPeriod.setNextPeriod(newPeriod);
}
bufferAheadPeriodCount++;
loadingPeriod = newPeriod;
long startPositionUs = playingPeriod == null ? playbackInfo.positionUs : 0;
setIsLoading(true);
@ -802,6 +807,7 @@ import java.util.ArrayList;
// reached the end of the playing period, so advance playback to the next period.
playingPeriod.release();
setPlayingPeriod(playingPeriod.nextPeriod);
bufferAheadPeriodCount--;
playbackInfo = new PlaybackInfo(playingPeriod.index);
updatePlaybackPositions();
eventHandler.obtainMessage(MSG_PERIOD_CHANGED, playbackInfo).sendToTarget();
@ -903,6 +909,7 @@ import java.util.ArrayList;
period = period.nextPeriod;
}
bufferAheadPeriodCount = 0;
if (newPlayingPeriod != null) {
newPlayingPeriod.nextPeriod = null;
setPlayingPeriod(newPlayingPeriod);
@ -957,6 +964,7 @@ import java.util.ArrayList;
readingPeriod = playingPeriod;
loadingPeriod = playingPeriod;
playingPeriodEndPositionUs = C.UNSET_TIME_US;
bufferAheadPeriodCount = 0;
// Update streams for the new selection, recreating all streams if reading ahead.
boolean recreateStreams = readingPeriod != playingPeriod;
@ -1000,6 +1008,7 @@ import java.util.ArrayList;
while (period != null) {
period.release();
period = period.nextPeriod;
bufferAheadPeriodCount--;
}
loadingPeriod.nextPeriod = null;
long positionUs = Math.max(0, internalPositionUs - loadingPeriod.offsetUs);
@ -1017,6 +1026,7 @@ import java.util.ArrayList;
readingPeriod = null;
loadingPeriod = null;
timeline = null;
bufferAheadPeriodCount = 0;
}
private void releasePeriodsFrom(Period period) {