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Add a "forceLowestBitrate" option to DefaultTrackSelector

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-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=169668371
This commit is contained in:
aquilescanta 2017-09-22 03:22:02 -07:00 committed by Oliver Woodman
parent 25a9177ce3
commit 4fb18453e1
1 changed files with 60 additions and 30 deletions
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90
library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
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@ -127,6 +127,11 @@ public class DefaultTrackSelector extends MappingTrackSelector {
public final boolean viewportOrientationMayChange;
// General
/**
* Whether to force selection of the single lowest bitrate audio and video tracks that comply
* with all other constraints.
*/
public final boolean forceLowestBitrate;
/**
* Whether to allow adaptive selections containing mixed mime types.
*/
@ -145,6 +150,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
* <ul>
* <li>No preferred audio language is set.</li>
* <li>No preferred text language is set.</li>
* <li>Lowest bitrate track selections are not forced.</li>
* <li>Adaptation between different mime types is not allowed.</li>
* <li>Non seamless adaptation is allowed.</li>
* <li>No max limit for video width/height.</li>
@ -155,13 +161,14 @@ public class DefaultTrackSelector extends MappingTrackSelector {
* </ul>
*/
public Parameters() {
this(null, null, false, true, Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE, true,
true, Integer.MAX_VALUE, Integer.MAX_VALUE, true);
this(null, null, false, false, true, Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE,
true, true, Integer.MAX_VALUE, Integer.MAX_VALUE, true);
}
/**
* @param preferredAudioLanguage See {@link #preferredAudioLanguage}
* @param preferredTextLanguage See {@link #preferredTextLanguage}
* @param forceLowestBitrate See {@link #forceLowestBitrate}.
* @param allowMixedMimeAdaptiveness See {@link #allowMixedMimeAdaptiveness}
* @param allowNonSeamlessAdaptiveness See {@link #allowNonSeamlessAdaptiveness}
* @param maxVideoWidth See {@link #maxVideoWidth}
@ -174,12 +181,14 @@ public class DefaultTrackSelector extends MappingTrackSelector {
* @param viewportOrientationMayChange See {@link #viewportOrientationMayChange}
*/
public Parameters(String preferredAudioLanguage, String preferredTextLanguage,
boolean allowMixedMimeAdaptiveness, boolean allowNonSeamlessAdaptiveness,
int maxVideoWidth, int maxVideoHeight, int maxVideoBitrate,
boolean exceedVideoConstraintsIfNecessary, boolean exceedRendererCapabilitiesIfNecessary,
int viewportWidth, int viewportHeight, boolean viewportOrientationMayChange) {
boolean forceLowestBitrate, boolean allowMixedMimeAdaptiveness,
boolean allowNonSeamlessAdaptiveness, int maxVideoWidth, int maxVideoHeight,
int maxVideoBitrate, boolean exceedVideoConstraintsIfNecessary,
boolean exceedRendererCapabilitiesIfNecessary, int viewportWidth, int viewportHeight,
boolean viewportOrientationMayChange) {
this.preferredAudioLanguage = preferredAudioLanguage;
this.preferredTextLanguage = preferredTextLanguage;
this.forceLowestBitrate = forceLowestBitrate;
this.allowMixedMimeAdaptiveness = allowMixedMimeAdaptiveness;
this.allowNonSeamlessAdaptiveness = allowNonSeamlessAdaptiveness;
this.maxVideoWidth = maxVideoWidth;
@ -200,7 +209,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (TextUtils.equals(preferredAudioLanguage, this.preferredAudioLanguage)) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -214,7 +223,20 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (TextUtils.equals(preferredTextLanguage, this.preferredTextLanguage)) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
}
/**
* Returns an instance with the provided {@link #forceLowestBitrate}.
*/
public Parameters withForceLowestBitrate(boolean forceLowestBitrate) {
if (forceLowestBitrate == this.forceLowestBitrate) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -227,7 +249,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (allowMixedMimeAdaptiveness == this.allowMixedMimeAdaptiveness) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -240,7 +262,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (allowNonSeamlessAdaptiveness == this.allowNonSeamlessAdaptiveness) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -253,7 +275,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (maxVideoWidth == this.maxVideoWidth && maxVideoHeight == this.maxVideoHeight) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -266,7 +288,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (maxVideoBitrate == this.maxVideoBitrate) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -298,7 +320,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (exceedVideoConstraintsIfNecessary == this.exceedVideoConstraintsIfNecessary) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -312,7 +334,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (exceedRendererCapabilitiesIfNecessary == this.exceedRendererCapabilitiesIfNecessary) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -328,7 +350,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
&& viewportOrientationMayChange == this.viewportOrientationMayChange) {
return this;
}
return new Parameters(preferredAudioLanguage, preferredTextLanguage,
return new Parameters(preferredAudioLanguage, preferredTextLanguage, forceLowestBitrate,
allowMixedMimeAdaptiveness, allowNonSeamlessAdaptiveness, maxVideoWidth, maxVideoHeight,
maxVideoBitrate, exceedVideoConstraintsIfNecessary, exceedRendererCapabilitiesIfNecessary,
viewportWidth, viewportHeight, viewportOrientationMayChange);
@ -366,7 +388,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
return false;
}
Parameters other = (Parameters) obj;
return allowMixedMimeAdaptiveness == other.allowMixedMimeAdaptiveness
return forceLowestBitrate == other.forceLowestBitrate
&& allowMixedMimeAdaptiveness == other.allowMixedMimeAdaptiveness
&& allowNonSeamlessAdaptiveness == other.allowNonSeamlessAdaptiveness
&& maxVideoWidth == other.maxVideoWidth && maxVideoHeight == other.maxVideoHeight
&& exceedVideoConstraintsIfNecessary == other.exceedVideoConstraintsIfNecessary
@ -382,6 +405,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
public int hashCode() {
int result = preferredAudioLanguage.hashCode();
result = 31 * result + preferredTextLanguage.hashCode();
result = 31 * result + (forceLowestBitrate ? 1 : 0);
result = 31 * result + (allowMixedMimeAdaptiveness ? 1 : 0);
result = 31 * result + (allowNonSeamlessAdaptiveness ? 1 : 0);
result = 31 * result + maxVideoWidth;
@ -535,7 +559,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
TrackGroupArray groups, int[][] formatSupport, Parameters params,
TrackSelection.Factory adaptiveTrackSelectionFactory) throws ExoPlaybackException {
TrackSelection selection = null;
if (adaptiveTrackSelectionFactory != null) {
if (!params.forceLowestBitrate && adaptiveTrackSelectionFactory != null) {
selection = selectAdaptiveVideoTrack(rendererCapabilities, groups, formatSupport,
params, adaptiveTrackSelectionFactory);
}
@ -676,19 +700,21 @@ public class DefaultTrackSelector extends MappingTrackSelector {
}
boolean selectTrack = trackScore > selectedTrackScore;
if (trackScore == selectedTrackScore) {
// Use the pixel count as a tie breaker (or bitrate if pixel counts are tied). If we're
// within constraints prefer a higher pixel count (or bitrate), else prefer a lower
// count (or bitrate). If still tied then prefer the first track (i.e. the one that's
// already selected).
int comparisonResult;
int formatPixelCount = format.getPixelCount();
if (formatPixelCount != selectedPixelCount) {
comparisonResult = compareFormatValues(format.getPixelCount(), selectedPixelCount);
if (params.forceLowestBitrate) {
// Use bitrate as a tie breaker, preferring the lower bitrate.
selectTrack = compareFormatValues(format.bitrate, selectedBitrate) < 0;
} else {
comparisonResult = compareFormatValues(format.bitrate, selectedBitrate);
// Use the pixel count as a tie breaker (or bitrate if pixel counts are tied). If
// we're within constraints prefer a higher pixel count (or bitrate), else prefer a
// lower count (or bitrate). If still tied then prefer the first track (i.e. the one
// that's already selected).
int formatPixelCount = format.getPixelCount();
int comparisonResult = formatPixelCount != selectedPixelCount
? compareFormatValues(formatPixelCount, selectedPixelCount)
: compareFormatValues(format.bitrate, selectedBitrate);
selectTrack = isWithinCapabilities && isWithinConstraints
? comparisonResult > 0 : comparisonResult < 0;
}
selectTrack = isWithinCapabilities && isWithinConstraints
? comparisonResult > 0 : comparisonResult < 0;
}
if (selectTrack) {
selectedGroup = trackGroup;
@ -739,6 +765,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
int selectedGroupIndex = C.INDEX_UNSET;
int selectedTrackIndex = C.INDEX_UNSET;
int selectedTrackScore = 0;
int selectedBitrate = Format.NO_VALUE;
for (int groupIndex = 0; groupIndex < groups.length; groupIndex++) {
TrackGroup trackGroup = groups.get(groupIndex);
int[] trackFormatSupport = formatSupport[groupIndex];
@ -748,10 +775,13 @@ public class DefaultTrackSelector extends MappingTrackSelector {
Format format = trackGroup.getFormat(trackIndex);
int trackScore = getAudioTrackScore(trackFormatSupport[trackIndex],
params.preferredAudioLanguage, format);
if (trackScore > selectedTrackScore) {
if (trackScore > selectedTrackScore
|| (trackScore == selectedTrackScore && params.forceLowestBitrate
&& compareFormatValues(format.bitrate, selectedBitrate) < 0)) {
selectedGroupIndex = groupIndex;
selectedTrackIndex = trackIndex;
selectedTrackScore = trackScore;
selectedBitrate = format.bitrate;
}
}
}
@ -762,7 +792,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
}
TrackGroup selectedGroup = groups.get(selectedGroupIndex);
if (adaptiveTrackSelectionFactory != null) {
if (!params.forceLowestBitrate && adaptiveTrackSelectionFactory != null) {
// If the group of the track with the highest score allows it, try to enable adaptation.
int[] adaptiveTracks = getAdaptiveAudioTracks(selectedGroup,
formatSupport[selectedGroupIndex], params.allowMixedMimeAdaptiveness);