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Add comments to PlaybackResolver and remove useless @NonNull

This commit is contained in:
Stypox 2022-05-21 12:00:02 +02:00 committed by AudricV
parent 8445c381c5
commit e5ffa2aa09
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1 changed files with 105 additions and 78 deletions
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183
app/src/main/java/org/schabi/newpipe/player/resolver/PlaybackResolver.java
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@ -8,6 +8,8 @@ import static org.schabi.newpipe.player.helper.PlayerDataSource.LIVE_STREAM_EDGE
import android.net.Uri;
import android.util.Log;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.MediaItem;
import com.google.android.exoplayer2.source.MediaSource;
@ -41,20 +43,23 @@ import org.schabi.newpipe.player.mediaitem.MediaItemTag;
import org.schabi.newpipe.player.mediaitem.StreamInfoTag;
import org.schabi.newpipe.util.StreamTypeUtil;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Objects;
/**
* This interface is just a shorthand for {@link Resolver} with {@link StreamInfo} as source and
* {@link MediaSource} as product. It contains many static methods that can be used by classes
* implementing this interface, and nothing else.
*/
public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
String TAG = PlaybackResolver.class.getSimpleName();
@NonNull
private static StringBuilder commonCacheKeyOf(@NonNull final StreamInfo info,
@NonNull final Stream stream,
//region Cache key generation
private static StringBuilder commonCacheKeyOf(final StreamInfo info,
final Stream stream,
final boolean resolutionOrBitrateUnknown) {
// stream info service id
final StringBuilder cacheKey = new StringBuilder(info.getServiceId());
@ -91,9 +96,20 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
return cacheKey;
}
@NonNull
static String cacheKeyOf(@NonNull final StreamInfo info,
@NonNull final VideoStream videoStream) {
/**
* Builds the cache key of a video stream. A cache key is unique to the features of the
* provided video stream, and when possible independent of <i>transient</i> parameters (such as
* the url of the stream). This ensures that there are no conflicts, but also that the cache is
* used as much as possible: the same cache should be used for two streams which have the same
* features but e.g. a different url, since the url might have been reloaded in the meantime,
* but the stream actually referenced by the url is still the same.
*
* @param info the stream info, to distinguish between streams with the same features but coming
* from different stream infos
* @param videoStream the video stream for which the cache key should be created
* @return a key to be used to store the cache of the provided video stream
*/
static String cacheKeyOf(final StreamInfo info, final VideoStream videoStream) {
final boolean resolutionUnknown = videoStream.getResolution().equals(RESOLUTION_UNKNOWN);
final StringBuilder cacheKey = commonCacheKeyOf(info, videoStream, resolutionUnknown);
@ -110,9 +126,20 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
return cacheKey.toString();
}
@NonNull
static String cacheKeyOf(@NonNull final StreamInfo info,
@NonNull final AudioStream audioStream) {
/**
* Builds the cache key of an audio stream. A cache key is unique to the features of the
* provided audio stream, and when possible independent of <i>transient</i> parameters (such as
* the url of the stream). This ensures that there are no conflicts, but also that the cache is
* used as much as possible: the same cache should be used for two streams which have the same
* features but e.g. a different url, since the url might have been reloaded in the meantime,
* but the stream actually referenced by the url is still the same.
*
* @param info the stream info, to distinguish between streams with the same features but coming
* from different stream infos
* @param audioStream the audio stream for which the cache key should be created
* @return a key to be used to store the cache of the provided audio stream
*/
static String cacheKeyOf(final StreamInfo info, final AudioStream audioStream) {
final boolean averageBitrateUnknown = audioStream.getAverageBitrate() == UNKNOWN_BITRATE;
final StringBuilder cacheKey = commonCacheKeyOf(info, audioStream, averageBitrateUnknown);
@ -124,10 +151,13 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
return cacheKey.toString();
}
//endregion
//region Live media sources
@Nullable
static MediaSource maybeBuildLiveMediaSource(@NonNull final PlayerDataSource dataSource,
@NonNull final StreamInfo info) {
static MediaSource maybeBuildLiveMediaSource(final PlayerDataSource dataSource,
final StreamInfo info) {
final StreamType streamType = info.getStreamType();
if (!StreamTypeUtil.isLiveStream(streamType)) {
return null;
@ -143,11 +173,10 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
return null;
}
@NonNull
static MediaSource buildLiveMediaSource(@NonNull final PlayerDataSource dataSource,
@NonNull final String sourceUrl,
static MediaSource buildLiveMediaSource(final PlayerDataSource dataSource,
final String sourceUrl,
@C.ContentType final int type,
@NonNull final MediaItemTag metadata) {
final MediaItemTag metadata) {
final MediaSource.Factory factory;
switch (type) {
case C.TYPE_SS:
@ -159,7 +188,7 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
case C.TYPE_HLS:
factory = dataSource.getLiveHlsMediaSourceFactory();
break;
default:
case C.TYPE_OTHER: case C.TYPE_RTSP: default:
throw new IllegalStateException("Unsupported type: " + type);
}
@ -173,13 +202,15 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
.build())
.build());
}
//endregion
@NonNull
static MediaSource buildMediaSource(@NonNull final PlayerDataSource dataSource,
@NonNull final Stream stream,
@NonNull final StreamInfo streamInfo,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata)
//region Generic media sources
static MediaSource buildMediaSource(final PlayerDataSource dataSource,
final Stream stream,
final StreamInfo streamInfo,
final String cacheKey,
final MediaItemTag metadata)
throws IOException {
if (streamInfo.getService() == ServiceList.YouTube) {
return createYoutubeMediaSource(stream, streamInfo, dataSource, cacheKey, metadata);
@ -201,12 +232,11 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> ProgressiveMediaSource buildProgressiveMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) throws IOException {
private static ProgressiveMediaSource buildProgressiveMediaSource(
final PlayerDataSource dataSource,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata) throws IOException {
final String url = stream.getContent();
if (isNullOrEmpty(url)) {
@ -223,12 +253,11 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> DashMediaSource buildDashMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) throws IOException {
private static DashMediaSource buildDashMediaSource(final PlayerDataSource dataSource,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata)
throws IOException {
final boolean isUrlStream = stream.isUrl();
if (isUrlStream && isNullOrEmpty(stream.getContent())) {
throw new IOException("Try to generate a DASH media source from an empty string or "
@ -260,10 +289,8 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> DashManifest createDashManifest(
@NonNull final String manifestContent,
@NonNull final T stream) throws IOException {
private static DashManifest createDashManifest(final String manifestContent,
final Stream stream) throws IOException {
try {
final ByteArrayInputStream dashManifestInput = new ByteArrayInputStream(
manifestContent.getBytes(StandardCharsets.UTF_8));
@ -278,12 +305,11 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> HlsMediaSource buildHlsMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) throws IOException {
private static HlsMediaSource buildHlsMediaSource(final PlayerDataSource dataSource,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata)
throws IOException {
final boolean isUrlStream = stream.isUrl();
if (isUrlStream && isNullOrEmpty(stream.getContent())) {
throw new IOException("Try to generate an HLS media source from an empty string or "
@ -324,12 +350,11 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> SsMediaSource buildSSMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) throws IOException {
private static SsMediaSource buildSSMediaSource(final PlayerDataSource dataSource,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata)
throws IOException {
final boolean isUrlStream = stream.isUrl();
if (isUrlStream && isNullOrEmpty(stream.getContent())) {
throw new IOException("Try to generate an SmoothStreaming media source from an empty "
@ -370,13 +395,16 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
.build());
}
}
//endregion
private static <T extends Stream> MediaSource createYoutubeMediaSource(
final T stream,
final StreamInfo streamInfo,
final PlayerDataSource dataSource,
final String cacheKey,
final MediaItemTag metadata) throws IOException {
//region YouTube media sources
private static MediaSource createYoutubeMediaSource(final Stream stream,
final StreamInfo streamInfo,
final PlayerDataSource dataSource,
final String cacheKey,
final MediaItemTag metadata)
throws IOException {
if (!(stream instanceof AudioStream || stream instanceof VideoStream)) {
throw new IOException("Try to generate a DASH manifest of a YouTube "
+ stream.getClass() + " " + stream.getContent());
@ -414,12 +442,12 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
private static <T extends Stream> MediaSource createYoutubeMediaSourceOfVideoStreamType(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final StreamInfo streamInfo,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) throws IOException {
private static MediaSource createYoutubeMediaSourceOfVideoStreamType(
final PlayerDataSource dataSource,
final Stream stream,
final StreamInfo streamInfo,
final String cacheKey,
final MediaItemTag metadata) throws IOException {
final DeliveryMethod deliveryMethod = stream.getDeliveryMethod();
switch (deliveryMethod) {
case PROGRESSIVE_HTTP:
@ -480,13 +508,12 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
}
}
@NonNull
private static <T extends Stream> DashMediaSource buildYoutubeManualDashMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final DashManifest dashManifest,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) {
private static DashMediaSource buildYoutubeManualDashMediaSource(
final PlayerDataSource dataSource,
final DashManifest dashManifest,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata) {
return dataSource.getYoutubeDashMediaSourceFactory().createMediaSource(dashManifest,
new MediaItem.Builder()
.setTag(metadata)
@ -495,12 +522,11 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
.build());
}
@NonNull
private static <T extends Stream> ProgressiveMediaSource buildYoutubeProgressiveMediaSource(
@NonNull final PlayerDataSource dataSource,
@NonNull final T stream,
@NonNull final String cacheKey,
@NonNull final MediaItemTag metadata) {
private static ProgressiveMediaSource buildYoutubeProgressiveMediaSource(
final PlayerDataSource dataSource,
final Stream stream,
final String cacheKey,
final MediaItemTag metadata) {
return dataSource.getYoutubeProgressiveMediaSourceFactory()
.createMediaSource(new MediaItem.Builder()
.setTag(metadata)
@ -508,4 +534,5 @@ public interface PlaybackResolver extends Resolver<StreamInfo, MediaSource> {
.setCustomCacheKey(cacheKey)
.build());
}
//endregion
}