Merge "Add callback for output stream." into rvc-dev am: 3e9669ff69 am: ccf37b0ffa (64a74862) · Commits · e / os / android_hardware_interfaces

audio/6.0/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@ hidl_interface {
		"IStreamIn.hal",
		"IStreamOut.hal",
		"IStreamOutCallback.hal",
		"IStreamOutEventCallback.hal",
		],
		interfaces: [
		"android.hardware.audio.common@6.0",

+13 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package android.hardware.audio@6.0;
		import android.hardware.audio.common@6.0;
		import IStream;
		import IStreamOutCallback;
		import IStreamOutEventCallback;

		interface IStreamOut extends IStream {
		/**
		@@ -167,6 +168,18 @@ interface IStreamOut extends IStream {
		*/
		clearCallback() generates (Result retval);

		/**
		* Set the callback interface for notifying about an output stream event.
		*
		* Calling this method with a null pointer will result in releasing
		* the local callback proxy on the server side and thus dereference
		* the callback implementation on the client side.
		*
		* @return retval operation completion status.
		*/
		setEventCallback(IStreamOutEventCallback callback)
		generates (Result retval);

		/**
		* Returns whether HAL supports pausing and resuming of streams.
		*

0 → 100644

+35 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2020 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.
		*/

		package android.hardware.audio@6.0;

		/**
		* Asynchronous stream out event callback interface. The interface provides
		* a way for the HAL to notify platform when there are changes, e.g. codec
		* format change, from the lower layer.
		*/
		interface IStreamOutEventCallback {
		/**
		* Codec format changed.
		*
		* @param audioMetadata is a buffer containing decoded format changes
		* reported by codec. The buffer contains data that can be transformed
		* to audio metadata, which is a C++ object based map. See
		* `system/media/audio_utils/include/audio_utils/Metadata.h` for
		* more details.
		*/
		oneway onCodecFormatChanged(vec<uint8_t> audioMetadata);
		};

+29 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,8 @@
		//#define LOG_NDEBUG 0
		#define ATRACE_TAG ATRACE_TAG_AUDIO

		#include <string.h>

		#include <memory>

		#include <android/log.h>
		@@ -612,6 +614,33 @@ Return<Result> StreamOut::setPlaybackRateParameters(const PlaybackRate& /*playba
		return Result::NOT_SUPPORTED;
		}

		Return<Result> StreamOut::setEventCallback(const sp<IStreamOutEventCallback>& callback) {
		if (mStream->set_event_callback == nullptr) return Result::NOT_SUPPORTED;
		int result = mStream->set_event_callback(mStream, StreamOut::asyncEventCallback, this);
		if (result == 0) {
		mEventCallback = callback;
		}
		return Stream::analyzeStatus("set_stream_out_callback", result, {ENOSYS} /ignore/);
		}

		// static
		int StreamOut::asyncEventCallback(stream_event_callback_type_t event, void* param, void* cookie) {
		StreamOut* self = reinterpret_cast<StreamOut*>(cookie);
		sp<IStreamOutEventCallback> eventCallback = self->mEventCallback;
		if (eventCallback.get() == nullptr) return 0;
		ALOGV("%s event %d", __func__, event);
		switch (event) {
		case STREAM_EVENT_CBK_TYPE_CODEC_FORMAT_CHANGED: {
		hidl_vec<uint8_t> audioMetadata;
		audioMetadata.setToExternal((uint8_t)param, strlen((char)param));
		eventCallback->onCodecFormatChanged(audioMetadata);
		} break;
		default:
		ALOGW("%s unknown event %d", __func__, event);
		break;
		}
		return 0;
		}
		#endif

		} // namespace implementation

+13 −2

Original line number	Diff line number	Diff line
		@@ -133,12 +133,19 @@ struct StreamOut : public IStreamOut {
		static Result getPresentationPositionImpl(audio_stream_out_t* stream, uint64_t* frames,
		TimeSpec* timeStamp);

		#if MAJOR_VERSION >= 6
		Return<Result> setEventCallback(const sp<IStreamOutEventCallback>& callback) override;
		#endif

		private:
		const sp<Device> mDevice;
		audio_stream_out_t* mStream;
		const sp<Stream> mStreamCommon;
		const sp<StreamMmap<audio_stream_out_t>> mStreamMmap;
		sp<IStreamOutCallback> mCallback;
		sp<IStreamOutCallback> mCallback; // Callback for non-blocking write and drain
		#if MAJOR_VERSION >= 6
		sp<IStreamOutEventCallback> mEventCallback;
		#endif
		std::unique_ptr<CommandMQ> mCommandMQ;
		std::unique_ptr<DataMQ> mDataMQ;
		std::unique_ptr<StatusMQ> mStatusMQ;
		@@ -149,6 +156,10 @@ struct StreamOut : public IStreamOut {
		virtual ~StreamOut();

		static int asyncCallback(stream_callback_event_t event, void* param, void* cookie);

		#if MAJOR_VERSION >= 6
		static int asyncEventCallback(stream_event_callback_type_t event, void* param, void* cookie);
		#endif
		};

		} // namespace implementation