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Change all the conditions and scores that are currently in the constructor of TextTrackScore to comparisons in TextTrackScore.compareTo

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This commit is contained in:
Yannick RUI 2019-07-15 16:05:01 +02:00
parent af98883a7b
commit 1909987dc8
1 changed files with 41 additions and 32 deletions
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73
library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
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@ -2508,49 +2508,30 @@ public class DefaultTrackSelector extends MappingTrackSelector {
/** Represents how well an text track matches the selection {@link Parameters}. */
protected static final class TextTrackScore implements Comparable<TextTrackScore> {
private final boolean isWithinRendererCapabilities;
private final boolean isDefault;
private final boolean isForced;
private final int languageScore;
private final int preferredLanguageScore;
private final int selectedAudioLanguageScore;
private final boolean trackHasNoLanguage;
private int bestMatchScore = 0;
private final boolean selectUndeterminedTextLanguage;
private final boolean stringDefinesNoLang;
public TextTrackScore(
Format format,
Parameters parameters,
int trackFormatSupport,
@Nullable String selectedAudioLanguage) {
languageScore = getFormatLanguageScore(format, parameters.preferredTextLanguage);
isWithinRendererCapabilities = isSupported(trackFormatSupport, false);
int maskedSelectionFlags =
format.selectionFlags & ~parameters.disabledTextTrackSelectionFlags;
isDefault = (format.selectionFlags & C.SELECTION_FLAG_DEFAULT) != 0;
isForced = (maskedSelectionFlags & C.SELECTION_FLAG_FORCED) != 0;
preferredLanguageScore = getFormatLanguageScore(format, parameters.preferredTextLanguage);
selectedAudioLanguageScore = getFormatLanguageScore(format, selectedAudioLanguage);
trackHasNoLanguage = formatHasNoLanguage(format);
if (languageScore > 0 || (parameters.selectUndeterminedTextLanguage && trackHasNoLanguage)) {
if (isDefault) {
bestMatchScore = 11;
} else if (!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.
bestMatchScore = 7;
} else {
bestMatchScore = 3;
}
bestMatchScore += languageScore;
} else if (isDefault) {
bestMatchScore = 2;
} else if (isForced
&& (languageScore > 0
|| (trackHasNoLanguage && stringDefinesNoLanguage(selectedAudioLanguage)))) {
bestMatchScore = 1;
} else {
// Track should not be selected.
bestMatchScore = -1;
}
if (isSupported(trackFormatSupport, false)) {
bestMatchScore += WITHIN_RENDERER_CAPABILITIES_BONUS;
}
selectUndeterminedTextLanguage = parameters.selectUndeterminedTextLanguage;
stringDefinesNoLang = stringDefinesNoLanguage(selectedAudioLanguage);
}
/**
@ -2562,10 +2543,38 @@ public class DefaultTrackSelector extends MappingTrackSelector {
*/
@Override
public int compareTo(@NonNull TextTrackScore other) {
if (this.bestMatchScore != other.bestMatchScore) {
return compareInts(this.bestMatchScore, other.bestMatchScore);
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;
}
} else {
return (this.preferredLanguageScore > 0 || (this.selectUndeterminedTextLanguage && this.trackHasNoLanguage)) ? 1 : -1;
}
return 0;
}
}
}