aaudio: indicate client UID and PID to audio flinger
Implement correct indication of client UID and PID to audio flinger
for AAudio MMAP streams in both exclusive mode and shared mode.
- Add start/stop client methods on MMAP streams used only when the MMAP
stream is in AAudio service and carries a mix of shared streams.
- Add "In Service'" indication from "client" side to AAudioServiceStreamMMAP
so that the behavior can be adapted accordingly.
- Modify logic on audio flinger side with regard to mmap tracks and
audio HAL stream activity:
- use same audio session for all clients on a same stream to match
audio policy logic to share same direct output stream for clients on same
session. This is also more consistent with current volume and effect
handling as all MMAP clients sharing the same output stream have the
same volume and use case.
- start/stop the HAL when the stream is started/stopped with the initial client
handle (returned when the stream is opened) but do not create a track.
AAudioService implementation will always send an additional start command before
first client starts and a stop command after last client stops,
in both shared and exclusive mode.
- start/stop a track only if the start/stop stream command is received
with a handle different from the initial handle.
- Allow more than one active client from the same UID on a MMAP input in audio policy.
Bug: 62950008
Test: verify playback and capture in mmap mode
Change-Id: I86151bbb637ff172d2fd5f813056eab13a7bcd3c
diff --git a/media/libaudioclient/IAudioPolicyService.cpp b/media/libaudioclient/IAudioPolicyService.cpp
index d320320..ceba211 100644
--- a/media/libaudioclient/IAudioPolicyService.cpp
+++ b/media/libaudioclient/IAudioPolicyService.cpp
@@ -323,6 +323,7 @@
return BAD_VALUE;
}
data.write(attr, sizeof(audio_attributes_t));
+ data.writeInt32(*input);
data.writeInt32(session);
data.writeInt32(pid);
data.writeInt32(uid);
@@ -1024,6 +1025,7 @@
CHECK_INTERFACE(IAudioPolicyService, data, reply);
audio_attributes_t attr;
data.read(&attr, sizeof(audio_attributes_t));
+ audio_io_handle_t input = (audio_io_handle_t)data.readInt32();
audio_session_t session = (audio_session_t)data.readInt32();
pid_t pid = (pid_t)data.readInt32();
uid_t uid = (uid_t)data.readInt32();
@@ -1033,7 +1035,6 @@
audio_input_flags_t flags = (audio_input_flags_t) data.readInt32();
audio_port_handle_t selectedDeviceId = (audio_port_handle_t) data.readInt32();
audio_port_handle_t portId = (audio_port_handle_t)data.readInt32();
- audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
status_t status = getInputForAttr(&attr, &input, session, pid, uid,
&config,
flags, &selectedDeviceId, &portId);
diff --git a/media/libaudioclient/include/media/AudioClient.h b/media/libaudioclient/include/media/AudioClient.h
new file mode 100644
index 0000000..9efd76d
--- /dev/null
+++ b/media/libaudioclient/include/media/AudioClient.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef ANDROID_AUDIO_CLIENT_H
+#define ANDROID_AUDIO_CLIENT_H
+
+#include <system/audio.h>
+#include <utils/String16.h>
+
+namespace android {
+
+class AudioClient {
+ public:
+ AudioClient() :
+ clientUid(-1), clientPid(-1), packageName("") {}
+
+ uid_t clientUid;
+ pid_t clientPid;
+ String16 packageName;
+};
+
+}; // namespace android
+
+#endif // ANDROID_AUDIO_CLIENT_H