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Improve code readability and fix an issue with text tracks that should not be selected

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This commit is contained in:
Yannick RUI 2019-07-19 08:38:47 +02:00
parent 1909987dc8
commit 8b554dc30a
1 changed files with 30 additions and 32 deletions
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62
library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
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@ -2076,7 +2076,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
params.exceedRendererCapabilitiesIfNecessary)) {
Format format = trackGroup.getFormat(trackIndex);
TextTrackScore trackScore = new TextTrackScore(format, params, trackFormatSupport[trackIndex], selectedAudioLanguage);
if ((selectedTrackScore == null) || trackScore.compareTo(selectedTrackScore) > 0) {
if (trackScore.isWithinConstraints
&& ((selectedTrackScore == null) || trackScore.compareTo(selectedTrackScore) > 0)) {
selectedGroup = trackGroup;
selectedTrackIndex = trackIndex;
selectedTrackScore = trackScore;
@ -2514,8 +2515,9 @@ public class DefaultTrackSelector extends MappingTrackSelector {
private final int preferredLanguageScore;
private final int selectedAudioLanguageScore;
private final boolean trackHasNoLanguage;
private final boolean selectUndeterminedTextLanguage;
private final boolean stringDefinesNoLang;
private final boolean hasLanguageMatch;
private final boolean hasSelectedAudioLanguageMatch;
private final boolean isWithinConstraints;
public TextTrackScore(
Format format,
@ -2525,13 +2527,17 @@ public class DefaultTrackSelector extends MappingTrackSelector {
isWithinRendererCapabilities = isSupported(trackFormatSupport, false);
int maskedSelectionFlags =
format.selectionFlags & ~parameters.disabledTextTrackSelectionFlags;
isDefault = (format.selectionFlags & C.SELECTION_FLAG_DEFAULT) != 0;
isDefault = (maskedSelectionFlags & C.SELECTION_FLAG_DEFAULT) != 0;
isForced = (maskedSelectionFlags & C.SELECTION_FLAG_FORCED) != 0;
preferredLanguageScore = getFormatLanguageScore(format, parameters.preferredTextLanguage);
selectedAudioLanguageScore = getFormatLanguageScore(format, selectedAudioLanguage);
trackHasNoLanguage = formatHasNoLanguage(format);
selectUndeterminedTextLanguage = parameters.selectUndeterminedTextLanguage;
stringDefinesNoLang = stringDefinesNoLanguage(selectedAudioLanguage);
hasLanguageMatch = preferredLanguageScore > 0
|| (parameters.selectUndeterminedTextLanguage && trackHasNoLanguage);
hasSelectedAudioLanguageMatch = (selectedAudioLanguageScore > 0)
|| (trackHasNoLanguage && stringDefinesNoLanguage(selectedAudioLanguage));
isWithinConstraints =
(hasLanguageMatch || isDefault || (isForced && hasSelectedAudioLanguageMatch));
}
/**
@ -2546,34 +2552,26 @@ public class DefaultTrackSelector extends MappingTrackSelector {
if (this.isWithinRendererCapabilities != other.isWithinRendererCapabilities) {
return this.isWithinRendererCapabilities ? 1 : -1;
}
if ((this.preferredLanguageScore > 0 || (this.selectUndeterminedTextLanguage && this.trackHasNoLanguage)) ==
(other.preferredLanguageScore > 0 || (other.selectUndeterminedTextLanguage && other.trackHasNoLanguage))) {
if (this.preferredLanguageScore > 0 || (this.selectUndeterminedTextLanguage
&& this.trackHasNoLanguage)) {
if (this.isDefault != other.isDefault) {
return this.isDefault ? 1 : -1;
}
if (this.isForced != other.isForced) {
// Prefer non-forced to forced if a preferred text language has been specified. Where
// both are provided the non-forced track will usually contain the forced subtitles as
// a subset.
return !this.isForced ? 1 : -1;
}
return (this.preferredLanguageScore > other.preferredLanguageScore) ? 1 : -1;
} else {
if (this.isDefault != other.isDefault) {
return this.isDefault ? 1 : -1;
}
if ((this.isForced && (this.selectedAudioLanguageScore > 0 || (this.trackHasNoLanguage && this.stringDefinesNoLang))) !=
(other.isForced && (other.selectedAudioLanguageScore > 0 || (other.trackHasNoLanguage && other.stringDefinesNoLang)))) {
return (this.isForced && (this.selectedAudioLanguageScore > 0
|| (this.trackHasNoLanguage && this.stringDefinesNoLang))) ? 1 : -1;
}
// Track should not be selected.
return -1;
if (this.hasLanguageMatch != other.hasLanguageMatch) {
return this.hasLanguageMatch ? 1 : -1;
}
if (this.isDefault != other.isDefault) {
return this.isDefault ? 1 : -1;
}
if (this.hasLanguageMatch) {
if (this.isForced != other.isForced) {
// Prefer non-forced to forced if a preferred text language has been specified. Where
// both are provided the non-forced track will usually contain the forced subtitles as
// a subset.
return !this.isForced ? 1 : -1;
}
return this.preferredLanguageScore - other.preferredLanguageScore;
} else {
return (this.preferredLanguageScore > 0 || (this.selectUndeterminedTextLanguage && this.trackHasNoLanguage)) ? 1 : -1;
if ((this.isForced && this.hasSelectedAudioLanguageMatch) !=
(other.isForced && other.hasSelectedAudioLanguageMatch)) {
return (this.isForced && this.hasSelectedAudioLanguageMatch) ? 1 : -1;
}
return 0;
}
}
}