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AudioAttributes: add ability to set Hotword mode for capture

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Allow setting Hotword mode for capture usecases that want to use the low
power DSP based hotword source for capturing audio. This will be only
available for AudioSource.VOICE_RECOGNITION. There is no guarantee that
this mode will be available on the device. The caller must have the
CAPTURE_AUDIO_HOTWORD permission granted.

Bug 178317696
Test: Able to setHotwordMode from AGSA application. Confirmed
HAL receives the flag and audioSource correctly in open_input_stream.

Change-Id: I1fb80a047654e2abb8a587bf2f6ff82fcacd67b6
This commit is contained in:
Bhalchandra Gajare
2021-01-24 07:21:59 -08:00
parent daf905f45d
commit 25c32fbd9e
2 changed files with 25 additions and 0 deletions
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1
core/api/system-current.txt
View File

@@ -4622,6 +4622,7 @@ package android.media {
public static class AudioAttributes.Builder {
method public android.media.AudioAttributes.Builder addBundle(@NonNull android.os.Bundle);
method public android.media.AudioAttributes.Builder setCapturePreset(int);
method @NonNull @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_HOTWORD) public android.media.AudioAttributes.Builder setHotwordMode();
method public android.media.AudioAttributes.Builder setInternalCapturePreset(int);
method @NonNull @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING) public android.media.AudioAttributes.Builder setSystemUsage(int);
}

24
media/java/android/media/AudioAttributes.java
View File

@@ -739,6 +739,13 @@ public final class AudioAttributes implements Parcelable {
if (mBundle != null) {
aa.mBundle = new Bundle(mBundle);
}
// Allow the FLAG_HW_HOTWORD only for AudioSource.VOICE_RECOGNITION
if (mSource != MediaRecorder.AudioSource.VOICE_RECOGNITION
&& (mFlags & FLAG_HW_HOTWORD) == FLAG_HW_HOTWORD) {
aa.mFlags &= ~FLAG_HW_HOTWORD;
}
return aa;
}
@@ -851,6 +858,23 @@ public final class AudioAttributes implements Parcelable {
return this;
}
/**
* @hide
* Request for capture in hotword mode.
*
* Requests an audio path optimized for Hotword detection use cases from
* the low power audio DSP. This is valid only for capture with
* audio source {@link MediaRecorder.AudioSource#VOICE_RECOGNITION}.
* There is no guarantee that this mode is available on the device.
* @return the same Builder instance.
*/
@SystemApi
@RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_HOTWORD)
public @NonNull Builder setHotwordMode() {
mFlags |= FLAG_HW_HOTWORD;
return this;
}
/**
* Specifies whether the audio may or may not be captured by other apps or the system.
*