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