Example 1 with Util
use of com.google.android.exoplayer2.util.Util in project ExoPlayer by google.
the class DefaultTrackSelector method getViewportFilteredTrackIndices.
// Viewport size util methods.
private static List<Integer> getViewportFilteredTrackIndices(TrackGroup group, int viewportWidth, int viewportHeight, boolean orientationMayChange) {
// Initially include all indices.
ArrayList<Integer> selectedTrackIndices = new ArrayList<>(group.length);
for (int i = 0; i < group.length; i++) {
selectedTrackIndices.add(i);
}
if (viewportWidth == Integer.MAX_VALUE || viewportHeight == Integer.MAX_VALUE) {
// Viewport dimensions not set. Return the full set of indices.
return selectedTrackIndices;
}
int maxVideoPixelsToRetain = Integer.MAX_VALUE;
for (int i = 0; i < group.length; i++) {
Format format = group.getFormat(i);
// We'll discard formats of higher resolution.
if (format.width > 0 && format.height > 0) {
Point maxVideoSizeInViewport = getMaxVideoSizeInViewport(orientationMayChange, viewportWidth, viewportHeight, format.width, format.height);
int videoPixels = format.width * format.height;
if (format.width >= (int) (maxVideoSizeInViewport.x * FRACTION_TO_CONSIDER_FULLSCREEN) && format.height >= (int) (maxVideoSizeInViewport.y * FRACTION_TO_CONSIDER_FULLSCREEN) && videoPixels < maxVideoPixelsToRetain) {
maxVideoPixelsToRetain = videoPixels;
}
}
}
// filter out formats with unknown dimensions, since we have some whose dimensions are known.
if (maxVideoPixelsToRetain != Integer.MAX_VALUE) {
for (int i = selectedTrackIndices.size() - 1; i >= 0; i--) {
Format format = group.getFormat(selectedTrackIndices.get(i));
int pixelCount = format.getPixelCount();
if (pixelCount == Format.NO_VALUE || pixelCount > maxVideoPixelsToRetain) {
selectedTrackIndices.remove(i);
}
}
}
return selectedTrackIndices;
}