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Merge pull request #316 from jeoliva/blackplaylist_management

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Better management of blacklisted playlists
This commit is contained in:
ojw28 2015-02-25 14:33:26 +00:00
commit ea95db2375
1 changed files with 23 additions and 0 deletions
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23
library/src/main/java/com/google/android/exoplayer/hls/HlsChunkSource.java
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@ -106,6 +106,12 @@ public class HlsChunkSource {
*/
public static final long DEFAULT_MAX_BUFFER_TO_SWITCH_DOWN_MS = 20000;
/**
* The default maximum time a media playlist is blacklisted without
* rechecking if it is alive again (because an encoder reset, for example)
*/
public static final long DEFAULT_MAX_TIME_MEDIA_PLAYLIST_BLACKLISTED_MS = 60000;
private static final String TAG = "HlsChunkSource";
private static final String AAC_FILE_EXTENSION = ".aac";
private static final float BANDWIDTH_FRACTION = 0.8f;
@ -127,6 +133,7 @@ public class HlsChunkSource {
/* package */ byte[] scratchSpace;
/* package */ final HlsMediaPlaylist[] mediaPlaylists;
/* package */ final boolean[] mediaPlaylistBlacklistFlags;
/* package */ final long[] mediaPlaylistBlacklistedTimeMs;
/* package */ final long[] lastMediaPlaylistLoadTimesMs;
/* package */ boolean live;
/* package */ long durationUs;
@ -182,6 +189,7 @@ public class HlsChunkSource {
enabledVariants = new Variant[] {new Variant(0, playlistUrl, 0, null, -1, -1)};
mediaPlaylists = new HlsMediaPlaylist[1];
mediaPlaylistBlacklistFlags = new boolean[1];
mediaPlaylistBlacklistedTimeMs = new long[1];
lastMediaPlaylistLoadTimesMs = new long[1];
setMediaPlaylist(0, (HlsMediaPlaylist) playlist);
} else {
@ -189,6 +197,7 @@ public class HlsChunkSource {
enabledVariants = filterVariants((HlsMasterPlaylist) playlist, variantIndices);
mediaPlaylists = new HlsMediaPlaylist[enabledVariants.length];
mediaPlaylistBlacklistFlags = new boolean[enabledVariants.length];
mediaPlaylistBlacklistedTimeMs = new long[enabledVariants.length];
lastMediaPlaylistLoadTimesMs = new long[enabledVariants.length];
}
@ -362,6 +371,7 @@ public class HlsChunkSource {
if (responseCode == 404 || responseCode == 410) {
MediaPlaylistChunk playlistChunk = (MediaPlaylistChunk) chunk;
mediaPlaylistBlacklistFlags[playlistChunk.variantIndex] = true;
mediaPlaylistBlacklistedTimeMs[playlistChunk.variantIndex] = SystemClock.elapsedRealtime();
if (!allPlaylistsBlacklisted()) {
// We've handled the 404/410 by blacklisting the playlist.
Log.w(TAG, "Blacklisted playlist (" + responseCode + "): "
@ -372,6 +382,7 @@ public class HlsChunkSource {
Log.w(TAG, "Final playlist not blacklisted (" + responseCode + "): "
+ playlistChunk.dataSpec.uri);
mediaPlaylistBlacklistFlags[playlistChunk.variantIndex] = false;
mediaPlaylistBlacklistedTimeMs[playlistChunk.variantIndex] = 0;
return false;
}
}
@ -380,6 +391,7 @@ public class HlsChunkSource {
}
private int getNextVariantIndex(TsChunk previousTsChunk, long playbackPositionUs) {
clearStaleBlacklistedPlaylists();
int idealVariantIndex = getVariantIndexForBandwdith(
(int) (bandwidthMeter.getBitrateEstimate() * BANDWIDTH_FRACTION));
if (idealVariantIndex == variantIndex) {
@ -541,6 +553,17 @@ public class HlsChunkSource {
return true;
}
private void clearStaleBlacklistedPlaylists() {
long currentTime = SystemClock.elapsedRealtime();
for (int i = 0; i < mediaPlaylistBlacklistFlags.length; i++) {
if (mediaPlaylistBlacklistFlags[i] &&
currentTime - mediaPlaylistBlacklistedTimeMs[i] > DEFAULT_MAX_TIME_MEDIA_PLAYLIST_BLACKLISTED_MS) {
mediaPlaylistBlacklistFlags[i] = false;
mediaPlaylistBlacklistedTimeMs[i] = 0;
}
}
}
private class MediaPlaylistChunk extends DataChunk {
@SuppressWarnings("hiding")