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Allow simplified custom adaptive track selection factories.

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Custom factories currently need to copy most of the code in the
AdaptiveTrackSelection.Factory to make use of the same functionality.
Simplify this by allowing to overwrite the factory.

PiperOrigin-RevId: 240773271
This commit is contained in:
tonihei 2019-03-28 14:58:49 +00:00 committed by Toni
parent bb48dc9916
commit e8cf67c0cd
1 changed files with 29 additions and 24 deletions
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53
library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
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@ -36,10 +36,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
*/
public class AdaptiveTrackSelection extends BaseTrackSelection {
/**
* Factory for {@link AdaptiveTrackSelection} instances.
*/
public static final class Factory implements TrackSelection.Factory {
/** Factory for {@link AdaptiveTrackSelection} instances. */
public static class Factory implements TrackSelection.Factory {
private final @Nullable BandwidthMeter bandwidthMeter;
private final int minDurationForQualityIncreaseMs;
@ -215,7 +213,8 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
*
* @param trackBitrateEstimator A {@link TrackBitrateEstimator}.
*/
public void experimental_setTrackBitrateEstimator(TrackBitrateEstimator trackBitrateEstimator) {
public final void experimental_setTrackBitrateEstimator(
TrackBitrateEstimator trackBitrateEstimator) {
this.trackBitrateEstimator = trackBitrateEstimator;
}
@ -224,13 +223,16 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
*
* <p>This method is experimental, and will be renamed or removed in a future release.
*/
public void experimental_enableBlockFixedTrackSelectionBandwidth() {
public final void experimental_enableBlockFixedTrackSelectionBandwidth() {
this.blockFixedTrackSelectionBandwidth = true;
}
@Override
public @NullableType TrackSelection[] createTrackSelections(
public final @NullableType TrackSelection[] createTrackSelections(
@NullableType Definition[] definitions, BandwidthMeter bandwidthMeter) {
if (this.bandwidthMeter != null) {
bandwidthMeter = this.bandwidthMeter;
}
TrackSelection[] selections = new TrackSelection[definitions.length];
List<AdaptiveTrackSelection> adaptiveSelections = new ArrayList<>();
int totalFixedBandwidth = 0;
@ -242,6 +244,7 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
if (definition.tracks.length > 1) {
AdaptiveTrackSelection adaptiveSelection =
createAdaptiveTrackSelection(definition.group, bandwidthMeter, definition.tracks);
adaptiveSelection.experimental_setTrackBitrateEstimator(trackBitrateEstimator);
adaptiveSelections.add(adaptiveSelection);
selections[i] = adaptiveSelection;
} else {
@ -279,24 +282,26 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
return selections;
}
private AdaptiveTrackSelection createAdaptiveTrackSelection(
/**
* Creates a single adaptive selection for the given group, bandwidth meter and tracks.
*
* @param group The {@link TrackGroup}.
* @param bandwidthMeter A {@link BandwidthMeter} which can be used to select tracks.
* @param tracks The indices of the selected tracks in the track group.
* @return An {@link AdaptiveTrackSelection} for the specified tracks.
*/
protected AdaptiveTrackSelection createAdaptiveTrackSelection(
TrackGroup group, BandwidthMeter bandwidthMeter, int[] tracks) {
if (this.bandwidthMeter != null) {
bandwidthMeter = this.bandwidthMeter;
}
AdaptiveTrackSelection adaptiveTrackSelection =
new AdaptiveTrackSelection(
group,
tracks,
new DefaultBandwidthProvider(bandwidthMeter, bandwidthFraction),
minDurationForQualityIncreaseMs,
maxDurationForQualityDecreaseMs,
minDurationToRetainAfterDiscardMs,
bufferedFractionToLiveEdgeForQualityIncrease,
minTimeBetweenBufferReevaluationMs,
clock);
adaptiveTrackSelection.experimental_setTrackBitrateEstimator(trackBitrateEstimator);
return adaptiveTrackSelection;
return new AdaptiveTrackSelection(
group,
tracks,
new DefaultBandwidthProvider(bandwidthMeter, bandwidthFraction),
minDurationForQualityIncreaseMs,
maxDurationForQualityDecreaseMs,
minDurationToRetainAfterDiscardMs,
bufferedFractionToLiveEdgeForQualityIncrease,
minTimeBetweenBufferReevaluationMs,
clock);
}
}