Introduce LE Audio software provider for bluetooth audio 2.1 am: b5f2d23e

        },

        {

            "Bluetooth Audio API",

            "android.hardware.bluetooth.audio@2.0::IBluetoothAudioProvidersFactory"

            "android.hardware.bluetooth.audio@2.1::IBluetoothAudioProvidersFactory",

            "android.hardware.bluetooth.audio@2.0::IBluetoothAudioProvidersFactory",

        },

        // remove the old HIDL when Bluetooth Audio Hal V2 has offloading supported

        {

// This file is autogenerated by hidl-gen -Landroidbp.

hidl_interface {

    name: "android.hardware.bluetooth.audio@2.1",

    root: "android.hardware",

    srcs: [

        "types.hal",

        "IBluetoothAudioProvider.hal",

        "IBluetoothAudioProvidersFactory.hal",

    ],

    interfaces: [

        "android.hardware.audio.common@5.0",

        "android.hardware.bluetooth.audio@2.0",

        "android.hidl.base@1.0",

        "android.hidl.safe_union@1.0",

    ],

    apex_available: [

        "//apex_available:platform",

        "com.android.bluetooth.updatable",

    ],

    gen_java: false,

}

/*

 * Copyright 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.bluetooth.audio@2.1;

import @2.0::IBluetoothAudioProvider;

import @2.0::IBluetoothAudioPort;

import @2.0::Status;

/**

 * HAL interface from the Bluetooth stack to the Audio HAL

 *

 * The Bluetooth stack calls methods in this interface to start and end audio

 * sessions and sends callback events to the Audio HAL.

 *

 * Note: For HIDL APIs with a "generates" statement, the callback parameter used

 * for return value must be invoked synchronously before the API call returns.

 */

interface IBluetoothAudioProvider extends @2.0::IBluetoothAudioProvider {

    /**

     * This method indicates that the Bluetooth stack is ready to stream audio.

     * It registers an instance of IBluetoothAudioPort with and provides the

     * current negotiated codec to the Audio HAL. After this method is called,

     * the Audio HAL can invoke IBluetoothAudioPort.startStream().

     *

     * Note: endSession() must be called to unregister this IBluetoothAudioPort

     *

     * @param hostIf An instance of IBluetoothAudioPort for stream control

     * @param audioConfig The audio configuration negotiated with the remote

     *    device. The PCM parameters are set if software based encoding,

     *    otherwise the correct codec configuration is used for hardware

     *    encoding.

     *

     * @return status One of the following

     *    SUCCESS if this IBluetoothAudioPort was successfully registered with

     *        the Audio HAL

     *    UNSUPPORTED_CODEC_CONFIGURATION if the Audio HAL cannot register this

     *        IBluetoothAudioPort with the given codec configuration

     *    FAILURE if the Audio HAL cannot register this IBluetoothAudioPort for

     *        any other reason

     * @return dataMQ The fast message queue for audio data from/to this

     *    provider. Audio data will be in PCM format as specified by the

     *    audioConfig.pcmConfig parameter. Invalid if streaming is offloaded

     *    from/to hardware or on failure.

     */

    startSession_2_1(IBluetoothAudioPort hostIf, AudioConfiguration audioConfig)

                generates (Status status, fmq_sync<uint8_t> dataMQ);

};

/*

 * Copyright 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.bluetooth.audio@2.1;

import IBluetoothAudioProvider;

import @2.0::IBluetoothAudioProvidersFactory;

import @2.0::Status;

/**

 * This factory allows a HAL implementation to be split into multiple

 * independent providers.

 *

 * When the Bluetooth stack is ready to create an audio session, it must first

 * obtain the IBluetoothAudioProvider for that session type by calling

 * openProvider().

 *

 * Note: For HIDL APIs with a "generates" statement, the callback parameter used

 * for return value must be invoked synchronously before the API call returns.

 */

interface IBluetoothAudioProvidersFactory extends @2.0::IBluetoothAudioProvidersFactory {

    /**

     * Opens an audio provider for a session type. To close the provider, it is

     * necessary to release references to the returned provider object.

     *

     * @param sessionType The session type (e.g.

     *    LE_AUDIO_SOFTWARE_ENCODING_DATAPATH).

     *

     * @return status One of the following

     *    SUCCESS if the Audio HAL successfully opens the provider with the

     *        given session type

     *    FAILURE if the Audio HAL cannot open the provider

     * @return provider The provider of the specified session type

     */

    openProvider_2_1(SessionType sessionType)

        generates (Status status, IBluetoothAudioProvider provider);

    /**

     * Gets a list of audio capabilities for a session type.

     *

     * For software encoding, the PCM capabilities are returned.

     * For hardware encoding, the supported codecs and their capabilities are

     * returned.

     *

     * @param sessionType The session type (e.g.

     *    A2DP_SOFTWARE_ENCODING_DATAPATH).

     * @return audioCapabilities A list containing all the capabilities

     *    supported by the sesson type. The capabilities is a list of

     *    available options when configuring the codec for the session.

     *    For software encoding it is the PCM data rate.

     *    For hardware encoding it is the list of supported codecs and their

     *    capabilities.

     *    If a provider isn't supported, an empty list should be returned.

     *    Note: Only one entry should exist per codec when using hardware

     *    encoding.

     */

     getProviderCapabilities_2_1(SessionType sessionType)

         generates (vec<AudioCapabilities> audioCapabilities);

};

/*

 * Copyright 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.

 */

#define LOG_TAG "BTAudioProviderA2dpOffload"

#include "A2dpOffloadAudioProvider.h"

#include <android-base/logging.h>

#include <fmq/MessageQueue.h>

#include <hidl/MQDescriptor.h>

#include "BluetoothAudioSessionReport.h"

#include "BluetoothAudioSupportedCodecsDB.h"

namespace android {

namespace hardware {

namespace bluetooth {

namespace audio {

namespace V2_1 {

namespace implementation {

using ::android::bluetooth::audio::BluetoothAudioSessionReport;

using ::android::hardware::kSynchronizedReadWrite;

using ::android::hardware::MessageQueue;

using ::android::hardware::Void;

using ::android::hardware::bluetooth::audio::V2_0::AudioConfiguration;

using DataMQ = MessageQueue<uint8_t, kSynchronizedReadWrite>;

A2dpOffloadAudioProvider::A2dpOffloadAudioProvider()

    : BluetoothAudioProvider() {

  session_type_ = SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH;

}

bool A2dpOffloadAudioProvider::isValid(const V2_0::SessionType& sessionType) {

  return isValid(static_cast<SessionType>(sessionType));

}

bool A2dpOffloadAudioProvider::isValid(const SessionType& sessionType) {

  return (sessionType == session_type_);

}

Return<void> A2dpOffloadAudioProvider::startSession(

    const sp<IBluetoothAudioPort>& hostIf,

    const AudioConfiguration& audioConfig, startSession_cb _hidl_cb) {

  /**

   * Initialize the audio platform if audioConfiguration is supported.

   * Save the IBluetoothAudioPort interface, so that it can be used

   * later to send stream control commands to the HAL client, based on

   * interaction with Audio framework.

   */

  if (audioConfig.getDiscriminator() !=

      AudioConfiguration::hidl_discriminator::codecConfig) {

    LOG(WARNING) << __func__

                 << " - Invalid Audio Configuration=" << toString(audioConfig);

    _hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,

             DataMQ::Descriptor());

    return Void();

  } else if (!android::bluetooth::audio::IsOffloadCodecConfigurationValid(

                 session_type_, audioConfig.codecConfig())) {

    _hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,

             DataMQ::Descriptor());

    return Void();

  }

  return BluetoothAudioProvider::startSession(hostIf, audioConfig, _hidl_cb);

}

Return<void> A2dpOffloadAudioProvider::onSessionReady(

    startSession_cb _hidl_cb) {

  BluetoothAudioSessionReport::OnSessionStarted(session_type_, stack_iface_,

                                                nullptr, audio_config_);

  _hidl_cb(BluetoothAudioStatus::SUCCESS, DataMQ::Descriptor());

  return Void();

}

}  // namespace implementation

}  // namespace V2_1

}  // namespace audio

}  // namespace bluetooth

}  // namespace hardware

}  // namespace android