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Use Android 12's AudioManager.getPlaybackOffloadSupport

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Previously gapless offload support was hardcoded to Pixel
only.

PiperOrigin-RevId: 397070378
This commit is contained in:
krocard 2021-09-16 14:54:19 +01:00 committed by Christos Tsilopoulos
parent f8dde8ed5f
commit 4455554e9e
2 changed files with 47 additions and 19 deletions
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20
library/common/src/main/java/com/google/android/exoplayer2/C.java
View File

@ -459,6 +459,26 @@ public final class C {
public static final int AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE =
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE;
/**
* Playback offload mode. One of {@link #PLAYBACK_OFFLOAD_NOT_SUPPORTED},{@link
* PLAYBACK_OFFLOAD_SUPPORTED} or {@link PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED}.
*/
@IntDef({
PLAYBACK_OFFLOAD_NOT_SUPPORTED,
PLAYBACK_OFFLOAD_SUPPORTED,
PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED
})
@Retention(RetentionPolicy.SOURCE)
public @interface AudioManagerOffloadMode {}
/** See AudioManager#PLAYBACK_OFFLOAD_NOT_SUPPORTED */
public static final int PLAYBACK_OFFLOAD_NOT_SUPPORTED =
AudioManager.PLAYBACK_OFFLOAD_NOT_SUPPORTED;
/** See AudioManager#PLAYBACK_OFFLOAD_SUPPORTED */
public static final int PLAYBACK_OFFLOAD_SUPPORTED = AudioManager.PLAYBACK_OFFLOAD_SUPPORTED;
/** See AudioManager#PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED */
public static final int PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED =
AudioManager.PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED;
/**
* Flags which can apply to a buffer containing a media sample. Possible flag values are {@link
* #BUFFER_FLAG_KEY_FRAME}, {@link #BUFFER_FLAG_END_OF_STREAM}, {@link #BUFFER_FLAG_LAST_SAMPLE},

44
library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
View File

@ -1619,33 +1619,41 @@ public final class DefaultAudioSink implements AudioSink {
return false;
}
AudioFormat audioFormat = getAudioFormat(format.sampleRate, channelConfig, encoding);
if (!AudioManager.isOffloadedPlaybackSupported(
audioFormat, audioAttributes.getAudioAttributesV21())) {
switch (getOffloadedPlaybackSupport(audioFormat, audioAttributes.getAudioAttributesV21())) {
case C.PLAYBACK_OFFLOAD_NOT_SUPPORTED:
return false;
}
case C.PLAYBACK_OFFLOAD_SUPPORTED:
boolean isGapless = format.encoderDelay != 0 || format.encoderPadding != 0;
boolean offloadRequiresGaplessSupport = offloadMode == OFFLOAD_MODE_ENABLED_GAPLESS_REQUIRED;
if (isGapless && offloadRequiresGaplessSupport && !isOffloadedGaplessPlaybackSupported()) {
return false;
}
boolean gaplessSupportRequired = offloadMode == OFFLOAD_MODE_ENABLED_GAPLESS_REQUIRED;
return !isGapless || !gaplessSupportRequired;
case C.PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED:
return true;
default:
throw new IllegalStateException();
}
}
@C.AudioManagerOffloadMode
private int getOffloadedPlaybackSupport(
AudioFormat audioFormat, android.media.AudioAttributes audioAttributes) {
if (Util.SDK_INT >= 31) {
return AudioManager.getPlaybackOffloadSupport(audioFormat, audioAttributes);
}
if (!AudioManager.isOffloadedPlaybackSupported(audioFormat, audioAttributes)) {
return C.PLAYBACK_OFFLOAD_NOT_SUPPORTED;
}
// Manual testing has shown that Pixels on Android 11 support gapless offload.
if (Util.SDK_INT == 30 && Util.MODEL.startsWith("Pixel")) {
return C.PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED;
}
return C.PLAYBACK_OFFLOAD_SUPPORTED;
}
private static boolean isOffloadedPlayback(AudioTrack audioTrack) {
return Util.SDK_INT >= 29 && audioTrack.isOffloadedPlayback();
}
/**
* Returns whether the device supports gapless in offload playback.
*
* <p>Gapless offload is not supported by all devices and there is no API to query its support. As
* a result this detection is currently based on manual testing.
*/
// TODO(internal b/158191844): Add an SDK API to query offload gapless support.
private static boolean isOffloadedGaplessPlaybackSupported() {
return Util.SDK_INT >= 30 && Util.MODEL.startsWith("Pixel");
}
private static int getMaximumEncodedRateBytesPerSecond(@C.Encoding int encoding) {
switch (encoding) {
case C.ENCODING_MP3: