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Add bit-perfect mixer behavior.

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The bit-perfect mixer behavior is used by preferred mixer attributes
APIs. With setting the mixer behavior as bit-perfect, the audio data can
be sent bit-perfectly down to the HAL.

Bug: 239435816
Test: make
Change-Id: I86a3826e22ec04a861d033afe669b7ea44d81217
This commit is contained in:
jiabin
2022-12-06 00:01:08 +00:00
parent 89f87edfd2
commit 7a81f84343
3 changed files with 20 additions and 3 deletions
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1
core/api/current.txt
View File

@@ -20818,6 +20818,7 @@ package android.media {
method public int getMixerBehavior();
method public void writeToParcel(@NonNull android.os.Parcel, int);
field @NonNull public static final android.os.Parcelable.Creator<android.media.AudioMixerAttributes> CREATOR;
field public static final int MIXER_BEHAVIOR_BIT_PERFECT = 1; // 0x1
field public static final int MIXER_BEHAVIOR_DEFAULT = 0; // 0x0
}

5
core/jni/android_media_AudioMixerAttributes.h
View File

@@ -21,6 +21,7 @@
// Keep sync with AudioMixerAttributes.java
#define MIXER_BEHAVIOR_DEFAULT 0
#define MIXER_BEHAVIOR_BIT_PERFECT 1
// Invalid value is not added in JAVA API, but keep sync with native value
#define MIXER_BEHAVIOR_INVALID -1
@@ -28,6 +29,8 @@ static inline audio_mixer_behavior_t audioMixerBehaviorToNative(int mixerBehavio
switch (mixerBehavior) {
case MIXER_BEHAVIOR_DEFAULT:
return AUDIO_MIXER_BEHAVIOR_DEFAULT;
case MIXER_BEHAVIOR_BIT_PERFECT:
return AUDIO_MIXER_BEHAVIOR_BIT_PERFECT;
default:
return AUDIO_MIXER_BEHAVIOR_INVALID;
}
@@ -37,6 +40,8 @@ static inline jint audioMixerBehaviorFromNative(audio_mixer_behavior_t mixerBeha
switch (mixerBehavior) {
case AUDIO_MIXER_BEHAVIOR_DEFAULT:
return MIXER_BEHAVIOR_DEFAULT;
case AUDIO_MIXER_BEHAVIOR_BIT_PERFECT:
return MIXER_BEHAVIOR_BIT_PERFECT;
case AUDIO_MIXER_BEHAVIOR_INVALID:
default:
return MIXER_BEHAVIOR_INVALID;

17
media/java/android/media/AudioMixerAttributes.java
View File

@@ -37,10 +37,17 @@ public final class AudioMixerAttributes implements Parcelable {
*/
public static final int MIXER_BEHAVIOR_DEFAULT = 0;
/**
* Constant indicating the audio mixer behavior is bit-perfect, which indicates there will
* not be mixing happen, the audio data will be sent as is down to the HAL.
*/
public static final int MIXER_BEHAVIOR_BIT_PERFECT = 1;
/** @hide */
@IntDef(flag = false, prefix = "MIXER_BEHAVIOR_", value = {
MIXER_BEHAVIOR_DEFAULT }
)
MIXER_BEHAVIOR_DEFAULT,
MIXER_BEHAVIOR_BIT_PERFECT
})
@Retention(RetentionPolicy.SOURCE)
public @interface MixerBehavior {}
@@ -103,12 +110,14 @@ public final class AudioMixerAttributes implements Parcelable {
/**
* Sets the mixer behavior for the audio mixer
* @param mixerBehavior must be {@link #MIXER_BEHAVIOR_DEFAULT}.
* @param mixerBehavior must be {@link #MIXER_BEHAVIOR_DEFAULT} or
* {@link #MIXER_BEHAVIOR_BIT_PERFECT}.
* @return the same Builder instance.
*/
public @NonNull Builder setMixerBehavior(@MixerBehavior int mixerBehavior) {
switch (mixerBehavior) {
case MIXER_BEHAVIOR_DEFAULT:
case MIXER_BEHAVIOR_BIT_PERFECT:
mMixerBehavior = mixerBehavior;
break;
default:
@@ -137,6 +146,8 @@ public final class AudioMixerAttributes implements Parcelable {
switch (mixerBehavior) {
case MIXER_BEHAVIOR_DEFAULT:
return "default";
case MIXER_BEHAVIOR_BIT_PERFECT:
return "bit-perfect";
default:
return "unknown";
}