From ac4038295f11b2d9793d895bb2721878b2f70dbc Mon Sep 17 00:00:00 2001 From: Nicholas Ambur Date: Thu, 15 Dec 2022 14:56:22 +0000 Subject: [PATCH] increase HotwordAudioStream copy chunk size Each read to the read end of the HotwordAudioStream pipe provided by the HotwordDetectionService is now performed with 32KB size. This request will return early with whatever bytes are available to be read. The reason for increasing the default buffer size is to improve the throughput latency of data egressed from the HotwordDetectionService. Bug: 262433815 Test: Manual testing with test app Change-Id: I922bd28e6018bd5abb1c8b5e5e79f500c0b4c093 --- .../server/voiceinteraction/HotwordAudioStreamCopier.java | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordAudioStreamCopier.java b/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordAudioStreamCopier.java index b9d2ae6b0d392..f1e86100b8a41 100644 --- a/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordAudioStreamCopier.java +++ b/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordAudioStreamCopier.java @@ -60,10 +60,10 @@ final class HotwordAudioStreamCopier { private static final String OP_MESSAGE = "Streaming hotword audio to VoiceInteractionService"; private static final String TASK_ID_PREFIX = "HotwordDetectedResult@"; private static final String THREAD_NAME_PREFIX = "Copy-"; - private static final int DEFAULT_COPY_BUFFER_LENGTH_BYTES = 2_560; // Corresponds to the OS pipe capacity in bytes private static final int MAX_COPY_BUFFER_LENGTH_BYTES = 65_536; + private static final int DEFAULT_COPY_BUFFER_LENGTH_BYTES = 32_768; private final AppOpsManager mAppOpsManager; private final int mDetectorType;