Merge "Remove system/audio_a2dp_hw" into main am: 6265a3a48c (456077f8) · Commits · e / os / android_packages_modules_Bluetooth

TEST_MAPPING

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		@@ -25,9 +25,6 @@
		//{
		// "name": "bluetooth-test-audio-hal-interface"
		//},
		{
		"name": "net_test_audio_a2dp_hw"
		},
		{
		"name": "net_test_audio_hearing_aid_hw"
		},
		@@ -226,9 +223,6 @@
		//{
		// "name": "bluetooth-test-audio-hal-interface"
		//},
		{
		"name": "net_test_audio_a2dp_hw"
		},
		{
		"name": "net_test_audio_hearing_aid_hw"
		},

android/app/Android.bp

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		@@ -102,7 +102,6 @@ cc_library_shared {
		"lib-bt-packets-base",
		"libFraunhoferAAC",
		"libaconfig_storage_read_api_cc",
		"libaudio-a2dp-hw-utils",
		"libbase",
		"libbluetooth",
		"libbluetooth-dumpsys",

system/audio_a2dp_hw/Android.bp

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		package {
		// See: http://go/android-license-faq
		// A large-scale-change added 'default_applicable_licenses' to import
		// all of the 'license_kinds' from "system_bt_license"
		// to get the below license kinds:
		// SPDX-license-identifier-Apache-2.0
		default_applicable_licenses: ["system_bt_license"],
		}

		cc_defaults {
		name: "audio_a2dp_hw_defaults",
		defaults: ["bluetooth_cflags"],
		shared_libs: ["libchrome"],
		include_dirs: [
		"packages/modules/Bluetooth/system",
		"packages/modules/Bluetooth/system/audio_a2dp_hw/include",
		"packages/modules/Bluetooth/system/gd",
		"packages/modules/Bluetooth/system/include",
		"packages/modules/Bluetooth/system/types",
		],
		}

		// Audio A2DP shared library for target
		cc_library {
		name: "audio.a2dp.default",
		defaults: ["audio_a2dp_hw_defaults"],
		relative_install_path: "hw",
		srcs: [
		"src/audio_a2dp_hw.cc",
		"src/audio_a2dp_hw_utils.cc",
		],
		apex_available: [
		"com.android.btservices",
		],
		shared_libs: [
		"libbase",
		"libcutils",
		"liblog",
		],
		static_libs: [
		"libbluetooth_gd",
		"libbluetooth_log",
		"libosi",
		],
		}

		cc_library_static {
		name: "libaudio-a2dp-hw-utils",
		defaults: ["audio_a2dp_hw_defaults"],
		srcs: [
		"src/audio_a2dp_hw_utils.cc",
		],
		host_supported: true,
		apex_available: [
		"com.android.btservices",
		],
		static_libs: [
		"libbluetooth_log",
		],
		min_sdk_version: "29",
		}

		// Audio A2DP library unit tests for target and host
		cc_test {
		name: "net_test_audio_a2dp_hw",
		test_suites: ["general-tests"],
		defaults: [
		"audio_a2dp_hw_defaults",
		"mts_defaults",
		],
		srcs: [
		"test/audio_a2dp_hw_test.cc",
		],
		shared_libs: [
		"liblog",
		],
		static_libs: [
		"audio.a2dp.default",
		"libbluetooth_log",
		"libosi",
		],
		min_sdk_version: "29",
		}

system/audio_a2dp_hw/include/audio_a2dp_hw.h

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		/******************************************************************************
		*
		* Copyright 2009-2012 Broadcom Corporation
		*
		* 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.
		*
		******************************************************************************/

		/*****************************************************************************
		*
		* Filename: audio_a2dp_hw.h
		*
		* Description:
		*
		*****************************************************************************/

		#ifndef AUDIO_A2DP_HW_H
		#define AUDIO_A2DP_HW_H

		#include <stdint.h>

		#include <hardware/bt_av.h>

		/*****************************************************************************
		* Constants & Macros
		*****************************************************************************/

		#define A2DP_AUDIO_HARDWARE_INTERFACE "audio.a2dp"
		#define A2DP_CTRL_PATH "/data/misc/bluedroid/.a2dp_ctrl"
		#define A2DP_DATA_PATH "/data/misc/bluedroid/.a2dp_data"

		// AUDIO_STREAM_OUTPUT_BUFFER_SZ controls the size of the audio socket buffer.
		// If one assumes the write buffer is always full during normal BT playback,
		// then increasing this value increases our playback latency.
		//
		// FIXME: The BT HAL should consume data at a constant rate.
		// AudioFlinger assumes that the HAL draws data at a constant rate, which is
		// true for most audio devices; however, the BT engine reads data at a variable
		// rate (over the short term), which confuses both AudioFlinger as well as
		// applications which deliver data at a (generally) fixed rate.
		//
		// 20 * 512 is not sufficient to smooth the variability for some BT devices,
		// resulting in mixer sleep and throttling. We increase this to 28 * 512 to help
		// reduce the effect of variable data consumption.
		#define AUDIO_STREAM_OUTPUT_BUFFER_SZ (28 * 512)
		#define AUDIO_STREAM_CONTROL_OUTPUT_BUFFER_SZ 256

		// AUDIO_STREAM_OUTPUT_BUFFER_PERIODS controls how the socket buffer is divided
		// for AudioFlinger data delivery. The AudioFlinger mixer delivers data in
		// chunks of AUDIO_STREAM_OUTPUT_BUFFER_SZ / AUDIO_STREAM_OUTPUT_BUFFER_PERIODS.
		// If the number of periods is 2, the socket buffer represents "double
		// buffering" of the AudioFlinger mixer buffer.
		//
		// In general, AUDIO_STREAM_OUTPUT_BUFFER_PERIODS * 16 * 4 should be a divisor
		// of AUDIO_STREAM_OUTPUT_BUFFER_SZ.
		//
		// These values should be chosen such that
		//
		// AUDIO_STREAM_BUFFER_SIZE * 1000 / (AUDIO_STREAM_OUTPUT_BUFFER_PERIODS
		// * AUDIO_STREAM_DEFAULT_RATE * 4) > 20 (ms)
		//
		// to avoid introducing the FastMixer in AudioFlinger. Using the FastMixer
		// results in unnecessary latency and CPU overhead for Bluetooth.
		#define AUDIO_STREAM_OUTPUT_BUFFER_PERIODS 2

		#define AUDIO_SKT_DISCONNECTED (-1)

		typedef enum {
		A2DP_CTRL_CMD_NONE,
		A2DP_CTRL_CMD_CHECK_READY,
		A2DP_CTRL_CMD_START,
		A2DP_CTRL_CMD_STOP,
		A2DP_CTRL_CMD_SUSPEND,
		A2DP_CTRL_GET_INPUT_AUDIO_CONFIG,
		A2DP_CTRL_GET_OUTPUT_AUDIO_CONFIG,
		A2DP_CTRL_SET_OUTPUT_AUDIO_CONFIG,
		A2DP_CTRL_GET_PRESENTATION_POSITION,
		} tA2DP_CTRL_CMD;

		typedef enum {
		A2DP_CTRL_ACK_SUCCESS,
		A2DP_CTRL_ACK_FAILURE,
		A2DP_CTRL_ACK_INCALL_FAILURE, /* Failure when in Call*/
		A2DP_CTRL_ACK_UNSUPPORTED,
		A2DP_CTRL_ACK_PENDING,
		A2DP_CTRL_ACK_DISCONNECT_IN_PROGRESS,
		} tA2DP_CTRL_ACK;

		typedef uint32_t tA2DP_SAMPLE_RATE;
		typedef uint8_t tA2DP_CHANNEL_COUNT;
		typedef uint8_t tA2DP_BITS_PER_SAMPLE;

		/*****************************************************************************
		* Type definitions for callback functions
		*****************************************************************************/

		/*****************************************************************************
		* Type definitions and return values
		*****************************************************************************/

		/*****************************************************************************
		* Extern variables and functions
		*****************************************************************************/

		/*****************************************************************************
		* Functions
		*****************************************************************************/

		// Computes the Audio A2DP HAL output buffer size.
		// \|codec_sample_rate\| is the sample rate of the output stream.
		// \|codec_bits_per_sample\| is the number of bits per sample of the output
		// stream.
		// \|codec_channel_mode\| is the channel mode of the output stream.
		//
		// The buffer size is computed by using the following formula:
		//
		// AUDIO_STREAM_OUTPUT_BUFFER_SIZE =
		// (TIME_PERIOD_MS * AUDIO_STREAM_OUTPUT_BUFFER_PERIODS *
		// SAMPLE_RATE_HZ * NUMBER_OF_CHANNELS * (BITS_PER_SAMPLE / 8)) / 1000
		//
		// AUDIO_STREAM_OUTPUT_BUFFER_PERIODS controls how the socket buffer is
		// divided for AudioFlinger data delivery. The AudioFlinger mixer delivers
		// data in chunks of
		// (AUDIO_STREAM_OUTPUT_BUFFER_SIZE / AUDIO_STREAM_OUTPUT_BUFFER_PERIODS) .
		// If the number of periods is 2, the socket buffer represents "double
		// buffering" of the AudioFlinger mixer buffer.
		//
		// Furthermore, the AudioFlinger expects the buffer size to be a multiple
		// of 16 frames.
		//
		// NOTE: Currently, the computation uses the conservative 20ms time period.
		//
		// Returns the computed buffer size. If any of the input parameters is
		// invalid, the return value is the default \|AUDIO_STREAM_OUTPUT_BUFFER_SZ\|.
		size_t audio_a2dp_hw_stream_compute_buffer_size(
		btav_a2dp_codec_sample_rate_t codec_sample_rate,
		btav_a2dp_codec_bits_per_sample_t codec_bits_per_sample,
		btav_a2dp_codec_channel_mode_t codec_channel_mode);

		// Returns whether the delay reporting property is set.
		bool delay_reporting_enabled();

		// Returns a string representation of \|event\|.
		const char* audio_a2dp_hw_dump_ctrl_event(tA2DP_CTRL_CMD event);

		#endif /* A2DP_AUDIO_HW_H */

system/audio_a2dp_hw/src/audio_a2dp_hw.cc

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