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Fully document MappingTrackSelector

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-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=162721489
This commit is contained in:
olly 2017-07-21 02:43:25 -07:00 committed by Oliver Woodman
parent 07de4d1b2c
commit 89181cf4bc
2 changed files with 287 additions and 242 deletions
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4
library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
View File

@ -33,9 +33,7 @@ import java.util.List;
import java.util.concurrent.atomic.AtomicReference; import java.util.concurrent.atomic.AtomicReference;
/** /**
* A {@link MappingTrackSelector} that allows configuration of common parameters. It is safe to call * A {@link MappingTrackSelector} suitable for most use cases.
* the methods of this class from the application thread. See {@link Parameters#Parameters()} for
* default selection parameters.
*/ */
public class DefaultTrackSelector extends MappingTrackSelector { public class DefaultTrackSelector extends MappingTrackSelector {

525
library/core/src/main/java/com/google/android/exoplayer2/trackselection/MappingTrackSelector.java
View File

@ -20,6 +20,7 @@ import android.util.SparseArray;
import android.util.SparseBooleanArray; import android.util.SparseBooleanArray;
import com.google.android.exoplayer2.C; import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.ExoPlaybackException; import com.google.android.exoplayer2.ExoPlaybackException;
import com.google.android.exoplayer2.Player;
import com.google.android.exoplayer2.Renderer; import com.google.android.exoplayer2.Renderer;
import com.google.android.exoplayer2.RendererCapabilities; import com.google.android.exoplayer2.RendererCapabilities;
import com.google.android.exoplayer2.RendererConfiguration; import com.google.android.exoplayer2.RendererConfiguration;
@ -34,9 +35,258 @@ import java.util.Map;
* Base class for {@link TrackSelector}s that first establish a mapping between {@link TrackGroup}s * Base class for {@link TrackSelector}s that first establish a mapping between {@link TrackGroup}s
* and {@link Renderer}s, and then from that mapping create a {@link TrackSelection} for each * and {@link Renderer}s, and then from that mapping create a {@link TrackSelection} for each
* renderer. * renderer.
*
* <h3>Track overrides</h3>
* Mapping track selectors support overriding of track selections for each renderer. To specify an
* override for a renderer it's first necessary to obtain the tracks that have been mapped to it:
* <pre>
* {@code
* MappedTrackInfo mappedTrackInfo = trackSelector.getCurrentMappedTrackInfo();
* TrackGroupArray rendererTrackGroups = mappedTrackInfo == null ? null
* : mappedTrackInfo.getTrackGroups(rendererIndex);}
* </pre>
* If {@code rendererTrackGroups} is null then there aren't any currently mapped tracks, and so
* setting an override isn't possible. Note that a {@link Player.EventListener} registered on the
* player can be used to determine when the current tracks (and therefore the mapping) changes. If
* {@code rendererTrackGroups} is non-null then an override can be set. The next step is to query
* the properties of the available tracks to determine the {@code groupIndex} of the track group you
* want to select and the {@code trackIndices} within it. You can then create and set the override:
* <pre>
* {@code
* trackSelector.setSelectionOverride(rendererIndex, rendererTrackGroups,
* new SelectionOverride(trackSelectionFactory, groupIndex, trackIndices));}
* </pre>
* where {@code trackSelectionFactory} is a {@link TrackSelection.Factory} for generating concrete
* {@link TrackSelection} instances for the override. It's also possible to pass {@code null} as the
* selection override if you don't want any tracks to be selected.
* <p>
* Note that an override applies only when the track groups available to the renderer match the
* {@link TrackGroupArray} for which the override was specified. Overrides can be cleared using
* the {@code clearSelectionOverride} methods.
*
* <h3>Disabling renderers</h3>
* Renderers can be disabled using {@link #setRendererDisabled(int, boolean)}. Disabling a renderer
* differs from setting a {@code null} override because the renderer is disabled unconditionally,
* whereas a {@code null} override is applied only when the track groups available to the renderer
* match the {@link TrackGroupArray} for which it was specified.
*
* <h3>Tunneling</h3>
* Tunneled playback can be enabled in cases where the combination of renderers and selected tracks
* support it. See {@link #setTunnelingAudioSessionId(int)} for more details.
*/ */
public abstract class MappingTrackSelector extends TrackSelector { public abstract class MappingTrackSelector extends TrackSelector {
/**
* Provides mapped track information for each renderer.
*/
public static final class MappedTrackInfo {
/**
* The renderer does not have any associated tracks.
*/
public static final int RENDERER_SUPPORT_NO_TRACKS = 0;
/**
* The renderer has associated tracks, but all are of unsupported types.
*/
public static final int RENDERER_SUPPORT_UNSUPPORTED_TRACKS = 1;
/**
* The renderer has associated tracks and at least one is of a supported type, but all of the
* tracks whose types are supported exceed the renderer's capabilities.
*/
public static final int RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS = 2;
/**
* The renderer has associated tracks and can play at least one of them.
*/
public static final int RENDERER_SUPPORT_PLAYABLE_TRACKS = 3;
/**
* The number of renderers to which tracks are mapped.
*/
public final int length;
private final int[] rendererTrackTypes;
private final TrackGroupArray[] trackGroups;
private final int[] mixedMimeTypeAdaptiveSupport;
private final int[][][] formatSupport;
private final TrackGroupArray unassociatedTrackGroups;
/**
* @param rendererTrackTypes The track type supported by each renderer.
* @param trackGroups The {@link TrackGroup}s mapped to each renderer.
* @param mixedMimeTypeAdaptiveSupport The result of
* {@link RendererCapabilities#supportsMixedMimeTypeAdaptation()} for each renderer.
* @param formatSupport The result of {@link RendererCapabilities#supportsFormat} for each
* mapped track, indexed by renderer index, track group index and track index (in that
* order).
* @param unassociatedTrackGroups Any {@link TrackGroup}s not mapped to any renderer.
*/
/* package */ MappedTrackInfo(int[] rendererTrackTypes,
TrackGroupArray[] trackGroups, int[] mixedMimeTypeAdaptiveSupport,
int[][][] formatSupport, TrackGroupArray unassociatedTrackGroups) {
this.rendererTrackTypes = rendererTrackTypes;
this.trackGroups = trackGroups;
this.formatSupport = formatSupport;
this.mixedMimeTypeAdaptiveSupport = mixedMimeTypeAdaptiveSupport;
this.unassociatedTrackGroups = unassociatedTrackGroups;
this.length = trackGroups.length;
}
/**
* Returns the {@link TrackGroup}s mapped to the renderer at the specified index.
*
* @param rendererIndex The renderer index.
* @return The corresponding {@link TrackGroup}s.
*/
public TrackGroupArray getTrackGroups(int rendererIndex) {
return trackGroups[rendererIndex];
}
/**
* Returns the extent to which a renderer can play the tracks in the track groups mapped to it.
*
* @param rendererIndex The renderer index.
* @return One of {@link #RENDERER_SUPPORT_PLAYABLE_TRACKS},
* {@link #RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS},
* {@link #RENDERER_SUPPORT_UNSUPPORTED_TRACKS} and {@link #RENDERER_SUPPORT_NO_TRACKS}.
*/
public int getRendererSupport(int rendererIndex) {
int bestRendererSupport = RENDERER_SUPPORT_NO_TRACKS;
int[][] rendererFormatSupport = formatSupport[rendererIndex];
for (int i = 0; i < rendererFormatSupport.length; i++) {
for (int j = 0; j < rendererFormatSupport[i].length; j++) {
int trackRendererSupport;
switch (rendererFormatSupport[i][j] & RendererCapabilities.FORMAT_SUPPORT_MASK) {
case RendererCapabilities.FORMAT_HANDLED:
return RENDERER_SUPPORT_PLAYABLE_TRACKS;
case RendererCapabilities.FORMAT_EXCEEDS_CAPABILITIES:
trackRendererSupport = RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS;
break;
default:
trackRendererSupport = RENDERER_SUPPORT_UNSUPPORTED_TRACKS;
break;
}
bestRendererSupport = Math.max(bestRendererSupport, trackRendererSupport);
}
}
return bestRendererSupport;
}
/**
* Returns the best level of support obtained from {@link #getRendererSupport(int)} for all
* renderers of the specified track type. If no renderers exist for the specified type then
* {@link #RENDERER_SUPPORT_NO_TRACKS} is returned.
*
* @param trackType The track type. One of the {@link C} {@code TRACK_TYPE_*} constants.
* @return One of {@link #RENDERER_SUPPORT_PLAYABLE_TRACKS},
* {@link #RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS},
* {@link #RENDERER_SUPPORT_UNSUPPORTED_TRACKS} and {@link #RENDERER_SUPPORT_NO_TRACKS}.
*/
public int getTrackTypeRendererSupport(int trackType) {
int bestRendererSupport = RENDERER_SUPPORT_NO_TRACKS;
for (int i = 0; i < length; i++) {
if (rendererTrackTypes[i] == trackType) {
bestRendererSupport = Math.max(bestRendererSupport, getRendererSupport(i));
}
}
return bestRendererSupport;
}
/**
* Returns the extent to which an individual track is supported by the renderer.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the track group to which the track belongs.
* @param trackIndex The index of the track within the track group.
* @return One of {@link RendererCapabilities#FORMAT_HANDLED},
* {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES},
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} and
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE}.
*/
public int getTrackFormatSupport(int rendererIndex, int groupIndex, int trackIndex) {
return formatSupport[rendererIndex][groupIndex][trackIndex]
& RendererCapabilities.FORMAT_SUPPORT_MASK;
}
/**
* Returns the extent to which a renderer supports adaptation between supported tracks in a
* specified {@link TrackGroup}.
* <p>
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_HANDLED} are always considered.
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE} or
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} are never considered.
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES} are considered only if
* {@code includeCapabilitiesExceededTracks} is set to {@code true}.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the track group.
* @param includeCapabilitiesExceededTracks True if formats that exceed the capabilities of the
* renderer should be included when determining support. False otherwise.
* @return One of {@link RendererCapabilities#ADAPTIVE_SEAMLESS},
* {@link RendererCapabilities#ADAPTIVE_NOT_SEAMLESS} and
* {@link RendererCapabilities#ADAPTIVE_NOT_SUPPORTED}.
*/
public int getAdaptiveSupport(int rendererIndex, int groupIndex,
boolean includeCapabilitiesExceededTracks) {
int trackCount = trackGroups[rendererIndex].get(groupIndex).length;
// Iterate over the tracks in the group, recording the indices of those to consider.
int[] trackIndices = new int[trackCount];
int trackIndexCount = 0;
for (int i = 0; i < trackCount; i++) {
int fixedSupport = getTrackFormatSupport(rendererIndex, groupIndex, i);
if (fixedSupport == RendererCapabilities.FORMAT_HANDLED
|| (includeCapabilitiesExceededTracks
&& fixedSupport == RendererCapabilities.FORMAT_EXCEEDS_CAPABILITIES)) {
trackIndices[trackIndexCount++] = i;
}
}
trackIndices = Arrays.copyOf(trackIndices, trackIndexCount);
return getAdaptiveSupport(rendererIndex, groupIndex, trackIndices);
}
/**
* Returns the extent to which a renderer supports adaptation between specified tracks within
* a {@link TrackGroup}.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the track group.
* @return One of {@link RendererCapabilities#ADAPTIVE_SEAMLESS},
* {@link RendererCapabilities#ADAPTIVE_NOT_SEAMLESS} and
* {@link RendererCapabilities#ADAPTIVE_NOT_SUPPORTED}.
*/
public int getAdaptiveSupport(int rendererIndex, int groupIndex, int[] trackIndices) {
int handledTrackCount = 0;
int adaptiveSupport = RendererCapabilities.ADAPTIVE_SEAMLESS;
boolean multipleMimeTypes = false;
String firstSampleMimeType = null;
for (int i = 0; i < trackIndices.length; i++) {
int trackIndex = trackIndices[i];
String sampleMimeType = trackGroups[rendererIndex].get(groupIndex).getFormat(trackIndex)
.sampleMimeType;
if (handledTrackCount++ == 0) {
firstSampleMimeType = sampleMimeType;
} else {
multipleMimeTypes |= !Util.areEqual(firstSampleMimeType, sampleMimeType);
}
adaptiveSupport = Math.min(adaptiveSupport, formatSupport[rendererIndex][groupIndex][i]
& RendererCapabilities.ADAPTIVE_SUPPORT_MASK);
}
return multipleMimeTypes
? Math.min(adaptiveSupport, mixedMimeTypeAdaptiveSupport[rendererIndex])
: adaptiveSupport;
}
/**
* Returns {@link TrackGroup}s not mapped to any renderer.
*/
public TrackGroupArray getUnassociatedTrackGroups() {
return unassociatedTrackGroups;
}
}
/** /**
* A track selection override. * A track selection override.
*/ */
@ -49,8 +299,8 @@ public abstract class MappingTrackSelector extends TrackSelector {
/** /**
* @param factory A factory for creating selections from this override. * @param factory A factory for creating selections from this override.
* @param groupIndex The overriding group index. * @param groupIndex The overriding track group index.
* @param tracks The overriding track indices within the group. * @param tracks The overriding track indices within the track group.
*/ */
public SelectionOverride(TrackSelection.Factory factory, int groupIndex, int... tracks) { public SelectionOverride(TrackSelection.Factory factory, int groupIndex, int... tracks) {
this.factory = factory; this.factory = factory;
@ -62,7 +312,7 @@ public abstract class MappingTrackSelector extends TrackSelector {
/** /**
* Creates an selection from this override. * Creates an selection from this override.
* *
* @param groups The groups whose selection is being overridden. * @param groups The track groups whose selection is being overridden.
* @return The selection. * @return The selection.
*/ */
public TrackSelection createTrackSelection(TrackGroupArray groups) { public TrackSelection createTrackSelection(TrackGroupArray groups) {
@ -96,7 +346,7 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Returns the mapping information associated with the current track selections, or null if no * Returns the mapping information for the currently active track selection, or null if no
* selection is currently active. * selection is currently active.
*/ */
public final MappedTrackInfo getCurrentMappedTrackInfo() { public final MappedTrackInfo getCurrentMappedTrackInfo() {
@ -104,7 +354,8 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Sets whether the renderer at the specified index is disabled. * Sets whether the renderer at the specified index is disabled. Disabling a renderer prevents the
* selector from selecting any tracks for it.
* *
* @param rendererIndex The renderer index. * @param rendererIndex The renderer index.
* @param disabled Whether the renderer is disabled. * @param disabled Whether the renderer is disabled.
@ -129,16 +380,22 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Overrides the track selection for the renderer at a specified index. * Overrides the track selection for the renderer at the specified index.
* <p> * <p>
* When the {@link TrackGroupArray} available to the renderer at the specified index matches the * When the {@link TrackGroupArray} mapped to the renderer matches the one provided, the override
* one provided, the override is applied. When the {@link TrackGroupArray} does not match, the * is applied. When the {@link TrackGroupArray} does not match, the override has no effect. The
* override has no effect. The override replaces any previous override for the renderer and the * override replaces any previous override for the specified {@link TrackGroupArray} for the
* provided {@link TrackGroupArray}. * specified {@link Renderer}.
* <p> * <p>
* Passing a {@code null} override will explicitly disable the renderer. To remove overrides use * Passing a {@code null} override will cause the renderer to be disabled when the
* {@link #clearSelectionOverride(int, TrackGroupArray)}, {@link #clearSelectionOverrides(int)} * {@link TrackGroupArray} mapped to it matches the one provided. When the {@link TrackGroupArray}
* or {@link #clearSelectionOverrides()}. * does not match a {@code null} override has no effect. Hence a {@code null} override differs
* from disabling the renderer using {@link #setRendererDisabled(int, boolean)} because the
* renderer is disabled conditionally on the {@link TrackGroupArray} mapped to it, where-as
* {@link #setRendererDisabled(int, boolean)} disables the renderer unconditionally.
* <p>
* To remove overrides use {@link #clearSelectionOverride(int, TrackGroupArray)},
* {@link #clearSelectionOverrides(int)} or {@link #clearSelectionOverrides()}.
* *
* @param rendererIndex The renderer index. * @param rendererIndex The renderer index.
* @param groups The {@link TrackGroupArray} for which the override should be applied. * @param groups The {@link TrackGroupArray} for which the override should be applied.
@ -203,7 +460,7 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Clears all track selection override for the specified renderer. * Clears all track selection overrides for the specified renderer.
* *
* @param rendererIndex The renderer index. * @param rendererIndex The renderer index.
*/ */
@ -218,7 +475,7 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Clears all track selection overrides. * Clears all track selection overrides for all renderers.
*/ */
public final void clearSelectionOverrides() { public final void clearSelectionOverrides() {
if (selectionOverrides.size() == 0) { if (selectionOverrides.size() == 0) {
@ -340,15 +597,15 @@ public abstract class MappingTrackSelector extends TrackSelector {
} }
/** /**
* Given an array of renderers and a set of {@link TrackGroup}s mapped to each of them, provides a * Given an array of renderer capabilities and the {@link TrackGroupArray}s mapped to each of
* {@link TrackSelection} per renderer. * them, provides a {@link TrackSelection} per renderer.
* *
* @param rendererCapabilities The {@link RendererCapabilities} of the renderers for which * @param rendererCapabilities The {@link RendererCapabilities} of the renderers for which
* {@link TrackSelection}s are to be generated. * {@link TrackSelection}s are to be generated.
* @param rendererTrackGroupArrays An array of {@link TrackGroupArray}s where each entry * @param rendererTrackGroupArrays The {@link TrackGroupArray}s mapped to each of the renderers.
* corresponds to the renderer of equal index in {@code renderers}. * @param rendererFormatSupports The result of {@link RendererCapabilities#supportsFormat} for
* @param rendererFormatSupports Maps every available track to a specific level of support as * each mapped track, indexed by renderer index, track group index and track index (in that
* defined by the renderer {@code FORMAT_*} constants. * order).
* @throws ExoPlaybackException If an error occurs while selecting the tracks. * @throws ExoPlaybackException If an error occurs while selecting the tracks.
*/ */
protected abstract TrackSelection[] selectTracks(RendererCapabilities[] rendererCapabilities, protected abstract TrackSelection[] selectTracks(RendererCapabilities[] rendererCapabilities,
@ -356,9 +613,9 @@ public abstract class MappingTrackSelector extends TrackSelector {
throws ExoPlaybackException; throws ExoPlaybackException;
/** /**
* Finds the renderer to which the provided {@link TrackGroup} should be associated. * Finds the renderer to which the provided {@link TrackGroup} should be mapped.
* <p> * <p>
* A {@link TrackGroup} is associated to a renderer that reports * A {@link TrackGroup} is mapped to the renderer that reports
* {@link RendererCapabilities#FORMAT_HANDLED} support for one or more of the tracks in the group, * {@link RendererCapabilities#FORMAT_HANDLED} support for one or more of the tracks in the group,
* or {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES} if no such renderer exists, or * or {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES} if no such renderer exists, or
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} if again no such renderer exists. In * {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} if again no such renderer exists. In
@ -366,13 +623,13 @@ public abstract class MappingTrackSelector extends TrackSelector {
* lowest index is associated. * lowest index is associated.
* <p> * <p>
* If all renderers report {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE} for all of the * If all renderers report {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE} for all of the
* tracks in the group, then {@code renderers.length} is returned to indicate that no association * tracks in the group, then {@code renderers.length} is returned to indicate that the group was
* was made. * not mapped to any renderer.
* *
* @param rendererCapabilities The {@link RendererCapabilities} of the renderers. * @param rendererCapabilities The {@link RendererCapabilities} of the renderers.
* @param group The {@link TrackGroup} whose associated renderer is to be found. * @param group The track group to map to a renderer.
* @return The index of the associated renderer, or {@code renderers.length} if no * @return The index of the renderer to which the track group was mapped, or
* association was made. * {@code renderers.length} if it was not mapped to any renderer.
* @throws ExoPlaybackException If an error occurs finding a renderer. * @throws ExoPlaybackException If an error occurs finding a renderer.
*/ */
private static int findRenderer(RendererCapabilities[] rendererCapabilities, TrackGroup group) private static int findRenderer(RendererCapabilities[] rendererCapabilities, TrackGroup group)
@ -402,7 +659,7 @@ public abstract class MappingTrackSelector extends TrackSelector {
* {@link TrackGroup}, returning the results in an array. * {@link TrackGroup}, returning the results in an array.
* *
* @param rendererCapabilities The {@link RendererCapabilities} of the renderer. * @param rendererCapabilities The {@link RendererCapabilities} of the renderer.
* @param group The {@link TrackGroup} to evaluate. * @param group The track group to evaluate.
* @return An array containing the result of calling * @return An array containing the result of calling
* {@link RendererCapabilities#supportsFormat} for each track in the group. * {@link RendererCapabilities#supportsFormat} for each track in the group.
* @throws ExoPlaybackException If an error occurs determining the format support. * @throws ExoPlaybackException If an error occurs determining the format support.
@ -522,214 +779,4 @@ public abstract class MappingTrackSelector extends TrackSelector {
return true; return true;
} }
/**
* Provides track information for each renderer.
*/
public static final class MappedTrackInfo {
/**
* The renderer does not have any associated tracks.
*/
public static final int RENDERER_SUPPORT_NO_TRACKS = 0;
/**
* The renderer has associated tracks, but all are of unsupported types.
*/
public static final int RENDERER_SUPPORT_UNSUPPORTED_TRACKS = 1;
/**
* The renderer has associated tracks and at least one is of a supported type, but all of the
* tracks whose types are supported exceed the renderer's capabilities.
*/
public static final int RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS = 2;
/**
* The renderer has associated tracks and can play at least one of them.
*/
public static final int RENDERER_SUPPORT_PLAYABLE_TRACKS = 3;
/**
* The number of renderers to which tracks are mapped.
*/
public final int length;
private final int[] rendererTrackTypes;
private final TrackGroupArray[] trackGroups;
private final int[] mixedMimeTypeAdaptiveSupport;
private final int[][][] formatSupport;
private final TrackGroupArray unassociatedTrackGroups;
/**
* @param rendererTrackTypes The track type supported by each renderer.
* @param trackGroups The {@link TrackGroupArray}s for each renderer.
* @param mixedMimeTypeAdaptiveSupport The result of
* {@link RendererCapabilities#supportsMixedMimeTypeAdaptation()} for each renderer.
* @param formatSupport The result of {@link RendererCapabilities#supportsFormat} for each
* track, indexed by renderer index, group index and track index (in that order).
* @param unassociatedTrackGroups Contains {@link TrackGroup}s not associated with any renderer.
*/
/* package */ MappedTrackInfo(int[] rendererTrackTypes,
TrackGroupArray[] trackGroups, int[] mixedMimeTypeAdaptiveSupport,
int[][][] formatSupport, TrackGroupArray unassociatedTrackGroups) {
this.rendererTrackTypes = rendererTrackTypes;
this.trackGroups = trackGroups;
this.formatSupport = formatSupport;
this.mixedMimeTypeAdaptiveSupport = mixedMimeTypeAdaptiveSupport;
this.unassociatedTrackGroups = unassociatedTrackGroups;
this.length = trackGroups.length;
}
/**
* Returns the array of {@link TrackGroup}s associated to the renderer at a specified index.
*
* @param rendererIndex The renderer index.
* @return The corresponding {@link TrackGroup}s.
*/
public TrackGroupArray getTrackGroups(int rendererIndex) {
return trackGroups[rendererIndex];
}
/**
* Returns the extent to which a renderer can support playback of the tracks associated to it.
*
* @param rendererIndex The renderer index.
* @return One of {@link #RENDERER_SUPPORT_PLAYABLE_TRACKS},
* {@link #RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS},
* {@link #RENDERER_SUPPORT_UNSUPPORTED_TRACKS} and {@link #RENDERER_SUPPORT_NO_TRACKS}.
*/
public int getRendererSupport(int rendererIndex) {
int bestRendererSupport = RENDERER_SUPPORT_NO_TRACKS;
int[][] rendererFormatSupport = formatSupport[rendererIndex];
for (int i = 0; i < rendererFormatSupport.length; i++) {
for (int j = 0; j < rendererFormatSupport[i].length; j++) {
int trackRendererSupport;
switch (rendererFormatSupport[i][j] & RendererCapabilities.FORMAT_SUPPORT_MASK) {
case RendererCapabilities.FORMAT_HANDLED:
return RENDERER_SUPPORT_PLAYABLE_TRACKS;
case RendererCapabilities.FORMAT_EXCEEDS_CAPABILITIES:
trackRendererSupport = RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS;
break;
default:
trackRendererSupport = RENDERER_SUPPORT_UNSUPPORTED_TRACKS;
break;
}
bestRendererSupport = Math.max(bestRendererSupport, trackRendererSupport);
}
}
return bestRendererSupport;
}
/**
* Returns the best level of support obtained from {@link #getRendererSupport(int)} for all
* renderers of the specified track type. If no renderers exist for the specified type then
* {@link #RENDERER_SUPPORT_NO_TRACKS} is returned.
*
* @param trackType The track type. One of the {@link C} {@code TRACK_TYPE_*} constants.
* @return One of {@link #RENDERER_SUPPORT_PLAYABLE_TRACKS},
* {@link #RENDERER_SUPPORT_EXCEEDS_CAPABILITIES_TRACKS},
* {@link #RENDERER_SUPPORT_UNSUPPORTED_TRACKS} and {@link #RENDERER_SUPPORT_NO_TRACKS}.
*/
public int getTrackTypeRendererSupport(int trackType) {
int bestRendererSupport = RENDERER_SUPPORT_NO_TRACKS;
for (int i = 0; i < length; i++) {
if (rendererTrackTypes[i] == trackType) {
bestRendererSupport = Math.max(bestRendererSupport, getRendererSupport(i));
}
}
return bestRendererSupport;
}
/**
* Returns the extent to which the format of an individual track is supported by the renderer.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the group to which the track belongs.
* @param trackIndex The index of the track within the group.
* @return One of {@link RendererCapabilities#FORMAT_HANDLED},
* {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES},
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} and
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE}.
*/
public int getTrackFormatSupport(int rendererIndex, int groupIndex, int trackIndex) {
return formatSupport[rendererIndex][groupIndex][trackIndex]
& RendererCapabilities.FORMAT_SUPPORT_MASK;
}
/**
* Returns the extent to which the renderer supports adaptation between supported tracks in a
* specified {@link TrackGroup}.
* <p>
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_HANDLED} are always considered.
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_TYPE} or
* {@link RendererCapabilities#FORMAT_UNSUPPORTED_SUBTYPE} are never considered.
* Tracks for which {@link #getTrackFormatSupport(int, int, int)} returns
* {@link RendererCapabilities#FORMAT_EXCEEDS_CAPABILITIES} are considered only if
* {@code includeCapabilitiesExceededTracks} is set to {@code true}.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the group.
* @param includeCapabilitiesExceededTracks True if formats that exceed the capabilities of the
* renderer should be included when determining support. False otherwise.
* @return One of {@link RendererCapabilities#ADAPTIVE_SEAMLESS},
* {@link RendererCapabilities#ADAPTIVE_NOT_SEAMLESS} and
* {@link RendererCapabilities#ADAPTIVE_NOT_SUPPORTED}.
*/
public int getAdaptiveSupport(int rendererIndex, int groupIndex,
boolean includeCapabilitiesExceededTracks) {
int trackCount = trackGroups[rendererIndex].get(groupIndex).length;
// Iterate over the tracks in the group, recording the indices of those to consider.
int[] trackIndices = new int[trackCount];
int trackIndexCount = 0;
for (int i = 0; i < trackCount; i++) {
int fixedSupport = getTrackFormatSupport(rendererIndex, groupIndex, i);
if (fixedSupport == RendererCapabilities.FORMAT_HANDLED
|| (includeCapabilitiesExceededTracks
&& fixedSupport == RendererCapabilities.FORMAT_EXCEEDS_CAPABILITIES)) {
trackIndices[trackIndexCount++] = i;
}
}
trackIndices = Arrays.copyOf(trackIndices, trackIndexCount);
return getAdaptiveSupport(rendererIndex, groupIndex, trackIndices);
}
/**
* Returns the extent to which the renderer supports adaptation between specified tracks within
* a {@link TrackGroup}.
*
* @param rendererIndex The renderer index.
* @param groupIndex The index of the group.
* @return One of {@link RendererCapabilities#ADAPTIVE_SEAMLESS},
* {@link RendererCapabilities#ADAPTIVE_NOT_SEAMLESS} and
* {@link RendererCapabilities#ADAPTIVE_NOT_SUPPORTED}.
*/
public int getAdaptiveSupport(int rendererIndex, int groupIndex, int[] trackIndices) {
int handledTrackCount = 0;
int adaptiveSupport = RendererCapabilities.ADAPTIVE_SEAMLESS;
boolean multipleMimeTypes = false;
String firstSampleMimeType = null;
for (int i = 0; i < trackIndices.length; i++) {
int trackIndex = trackIndices[i];
String sampleMimeType = trackGroups[rendererIndex].get(groupIndex).getFormat(trackIndex)
.sampleMimeType;
if (handledTrackCount++ == 0) {
firstSampleMimeType = sampleMimeType;
} else {
multipleMimeTypes |= !Util.areEqual(firstSampleMimeType, sampleMimeType);
}
adaptiveSupport = Math.min(adaptiveSupport, formatSupport[rendererIndex][groupIndex][i]
& RendererCapabilities.ADAPTIVE_SUPPORT_MASK);
}
return multipleMimeTypes
? Math.min(adaptiveSupport, mixedMimeTypeAdaptiveSupport[rendererIndex])
: adaptiveSupport;
}
/**
* Returns the {@link TrackGroup}s not associated with any renderer.
*/
public TrackGroupArray getUnassociatedTrackGroups() {
return unassociatedTrackGroups;
}
}
} }