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Simplify DASH live presentation delay override

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This commit is contained in:
Oliver Woodman 2018-07-23 10:39:02 +01:00
parent 58fcf52b17
commit 41345dcb83
1 changed files with 60 additions and 53 deletions
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111
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
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@ -79,7 +79,7 @@ public final class DashMediaSource extends BaseMediaSource {
private CompositeSequenceableLoaderFactory compositeSequenceableLoaderFactory;
private int minLoadableRetryCount;
private long livePresentationDelayMs;
private long defaultLivePresentationDelayMs;
private boolean livePresentationDelayOverridesManifest;
private boolean isCreateCalled;
private @Nullable Object tag;
@ -98,8 +98,7 @@ public final class DashMediaSource extends BaseMediaSource {
this.chunkSourceFactory = Assertions.checkNotNull(chunkSourceFactory);
this.manifestDataSourceFactory = manifestDataSourceFactory;
minLoadableRetryCount = DEFAULT_MIN_LOADABLE_RETRY_COUNT;
livePresentationDelayMs = DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS;
defaultLivePresentationDelayMs = DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS;
livePresentationDelayMs = DEFAULT_LIVE_PRESENTATION_DELAY_MS;
compositeSequenceableLoaderFactory = new DefaultCompositeSequenceableLoaderFactory();
}
@ -132,41 +131,36 @@ public final class DashMediaSource extends BaseMediaSource {
return this;
}
/**
* Sets the duration in milliseconds by which the default start position should precede the end
* of the live window for live playbacks. The default value is {@link
* #DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS}.
*
* @param livePresentationDelayMs For live playbacks, the duration in milliseconds by which the
* default start position should precede the end of the live window. Use {@link
* #DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS} to use the value specified by the
* manifest, if present.
* @return This factory, for convenience.
* @throws IllegalStateException If one of the {@code create} methods has already been called.
*/
/** @deprecated Use {@link #setLivePresentationDelayMs(long, boolean)}. */
@Deprecated
@SuppressWarnings("deprecation")
public Factory setLivePresentationDelayMs(long livePresentationDelayMs) {
Assertions.checkState(!isCreateCalled);
this.livePresentationDelayMs = livePresentationDelayMs;
return this;
if (livePresentationDelayMs == DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS) {
return setLivePresentationDelayMs(DEFAULT_LIVE_PRESENTATION_DELAY_MS, false);
} else {
return setLivePresentationDelayMs(livePresentationDelayMs, true);
}
}
/**
* Sets the duration in milliseconds by which the default start position should precede the end
* of the live window for live playbacks if the value is not present in the manifest.
* The default value is {@link #DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS}. This value is only
* used when {@link setLivePresentationDelayMs} has not overwritten the presentation delay to a
* value other than #DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS
* of the live window for live playbacks. The {@code overridesManifest} parameter specifies
* whether the value is used in preference to one in the manifest, if present. The default value
* is {@link #DEFAULT_LIVE_PRESENTATION_DELAY_MS}, and by default {@code overridesManifest} is
* false.
*
* @param defaultLivePresentationDelayMs For live playbacks, the duration in milliseconds by
* which the default start position should precede the end of the live window if the
* duration is not specifed in the manifest or overwritten using
* {@link setLivePresentationDelayMs}.
* @param livePresentationDelayMs For live playbacks, the duration in milliseconds by which the
* default start position should precede the end of the live window.
* @param overridesManifest Whether the value is used in preference to one in the manifest, if
* present.
* @return This factory, for convenience.
* @throws IllegalStateException If one of the {@code create} methods has already been called.
*/
public Factory setDefaultLivePresentationDelayMs(long defaultLivePresentationDelayMs) {
public Factory setLivePresentationDelayMs(
long livePresentationDelayMs, boolean overridesManifest) {
Assertions.checkState(!isCreateCalled);
this.defaultLivePresentationDelayMs = defaultLivePresentationDelayMs;
this.livePresentationDelayMs = livePresentationDelayMs;
this.livePresentationDelayOverridesManifest = overridesManifest;
return this;
}
@ -223,7 +217,7 @@ public final class DashMediaSource extends BaseMediaSource {
compositeSequenceableLoaderFactory,
minLoadableRetryCount,
livePresentationDelayMs,
defaultLivePresentationDelayMs,
livePresentationDelayOverridesManifest,
tag);
}
@ -264,7 +258,7 @@ public final class DashMediaSource extends BaseMediaSource {
compositeSequenceableLoaderFactory,
minLoadableRetryCount,
livePresentationDelayMs,
defaultLivePresentationDelayMs,
livePresentationDelayOverridesManifest,
tag);
}
@ -294,18 +288,18 @@ public final class DashMediaSource extends BaseMediaSource {
* The default minimum number of times to retry loading data prior to failing.
*/
public static final int DEFAULT_MIN_LOADABLE_RETRY_COUNT = 3;
/**
* A constant indicating that the presentation delay for live streams should be set to
* {@link DashManifest#suggestedPresentationDelayMs} if specified by the manifest, or
* {@link #DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS} otherwise. The presentation delay is the
* duration by which the default start position precedes the end of the live window.
* The default presentation delay for live streams. The presentation delay is the duration by
* which the default start position precedes the end of the live window.
*/
public static final long DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS = -1;
/**
* A fixed default presentation delay for live streams. The presentation delay is the duration
* by which the default start position precedes the end of the live window.
*/
public static final long DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS = 30000;
public static final long DEFAULT_LIVE_PRESENTATION_DELAY_MS = 30000;
/** @deprecated Use {@link #DEFAULT_LIVE_PRESENTATION_DELAY_MS}. */
@Deprecated
public static final long DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS =
DEFAULT_LIVE_PRESENTATION_DELAY_MS;
/** @deprecated Use of this parameter is no longer necessary. */
@Deprecated public static final long DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS = -1;
/**
* The interval in milliseconds between invocations of {@link
@ -326,7 +320,7 @@ public final class DashMediaSource extends BaseMediaSource {
private final CompositeSequenceableLoaderFactory compositeSequenceableLoaderFactory;
private final int minLoadableRetryCount;
private final long livePresentationDelayMs;
private final long defaultLivePresentationDelayMs;
private final boolean livePresentationDelayOverridesManifest;
private final EventDispatcher manifestEventDispatcher;
private final ParsingLoadable.Parser<? extends DashManifest> manifestParser;
private final ManifestCallback manifestCallback;
@ -369,6 +363,7 @@ public final class DashMediaSource extends BaseMediaSource {
* @deprecated Use {@link Factory} instead.
*/
@Deprecated
@SuppressWarnings("deprecation")
public DashMediaSource(
DashManifest manifest,
DashChunkSource.Factory chunkSourceFactory,
@ -403,8 +398,8 @@ public final class DashMediaSource extends BaseMediaSource {
chunkSourceFactory,
new DefaultCompositeSequenceableLoaderFactory(),
minLoadableRetryCount,
DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS,
DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS,
DEFAULT_LIVE_PRESENTATION_DELAY_MS,
/* livePresentationDelayOverridesManifest= */ false,
/* tag= */ null);
if (eventHandler != null && eventListener != null) {
addEventListener(eventHandler, eventListener);
@ -424,6 +419,7 @@ public final class DashMediaSource extends BaseMediaSource {
* @deprecated Use {@link Factory} instead.
*/
@Deprecated
@SuppressWarnings("deprecation")
public DashMediaSource(
Uri manifestUri,
DataSource.Factory manifestDataSourceFactory,
@ -453,6 +449,7 @@ public final class DashMediaSource extends BaseMediaSource {
* @deprecated Use {@link Factory} instead.
*/
@Deprecated
@SuppressWarnings("deprecation")
public DashMediaSource(
Uri manifestUri,
DataSource.Factory manifestDataSourceFactory,
@ -461,8 +458,15 @@ public final class DashMediaSource extends BaseMediaSource {
long livePresentationDelayMs,
Handler eventHandler,
MediaSourceEventListener eventListener) {
this(manifestUri, manifestDataSourceFactory, new DashManifestParser(), chunkSourceFactory,
minLoadableRetryCount, livePresentationDelayMs, eventHandler, eventListener);
this(
manifestUri,
manifestDataSourceFactory,
new DashManifestParser(),
chunkSourceFactory,
minLoadableRetryCount,
livePresentationDelayMs,
eventHandler,
eventListener);
}
/**
@ -484,6 +488,7 @@ public final class DashMediaSource extends BaseMediaSource {
* @deprecated Use {@link Factory} instead.
*/
@Deprecated
@SuppressWarnings("deprecation")
public DashMediaSource(
Uri manifestUri,
DataSource.Factory manifestDataSourceFactory,
@ -501,8 +506,10 @@ public final class DashMediaSource extends BaseMediaSource {
chunkSourceFactory,
new DefaultCompositeSequenceableLoaderFactory(),
minLoadableRetryCount,
livePresentationDelayMs,
DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS,
livePresentationDelayMs == DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS
? DEFAULT_LIVE_PRESENTATION_DELAY_MS
: livePresentationDelayMs,
livePresentationDelayMs != DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS,
/* tag= */ null);
if (eventHandler != null && eventListener != null) {
addEventListener(eventHandler, eventListener);
@ -518,7 +525,7 @@ public final class DashMediaSource extends BaseMediaSource {
CompositeSequenceableLoaderFactory compositeSequenceableLoaderFactory,
int minLoadableRetryCount,
long livePresentationDelayMs,
long defaultLivePresentationDelayMs,
boolean livePresentationDelayOverridesManifest,
@Nullable Object tag) {
this.initialManifestUri = manifestUri;
this.manifest = manifest;
@ -528,7 +535,7 @@ public final class DashMediaSource extends BaseMediaSource {
this.chunkSourceFactory = chunkSourceFactory;
this.minLoadableRetryCount = minLoadableRetryCount;
this.livePresentationDelayMs = livePresentationDelayMs;
this.defaultLivePresentationDelayMs = defaultLivePresentationDelayMs;
this.livePresentationDelayOverridesManifest = livePresentationDelayOverridesManifest;
this.compositeSequenceableLoaderFactory = compositeSequenceableLoaderFactory;
this.tag = tag;
sideloadedManifest = manifest != null;
@ -912,9 +919,9 @@ public final class DashMediaSource extends BaseMediaSource {
long windowDefaultStartPositionUs = 0;
if (manifest.dynamic) {
long presentationDelayForManifestMs = livePresentationDelayMs;
if (presentationDelayForManifestMs == DEFAULT_LIVE_PRESENTATION_DELAY_PREFER_MANIFEST_MS) {
presentationDelayForManifestMs = manifest.suggestedPresentationDelayMs != C.TIME_UNSET
? manifest.suggestedPresentationDelayMs : defaultLivePresentationDelayMs;
if (!livePresentationDelayOverridesManifest
&& manifest.suggestedPresentationDelayMs != C.TIME_UNSET) {
presentationDelayForManifestMs = manifest.suggestedPresentationDelayMs;
}
// Snap the default position to the start of the segment containing it.
windowDefaultStartPositionUs = windowDurationUs - C.msToUs(presentationDelayForManifestMs);