Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1667430d authored by Abhishek Pandit-Subedi's avatar Abhishek Pandit-Subedi Committed by En-Shuo Hsu
Browse files

floss: Add HFP hal 

Add an HFP hal with stubbed defaults for Android and a complete
implementation for Floss that queries the kernel apis. Follow-up CLs
will integrate this into the stack.

Bug: 223685328
Tag: #floss
Test: Ran on Floss and verified HAL initializes with correct values.

Change-Id: I797646db2caef475aa77bbfb71616d82ea98d05c
parent cbbb39bb

system/stack/Android.bp

+2 −0
Original line number Original line Diff line number Diff line
@@ -136,6 +136,7 @@ cc_library_static { 
        "acl/btm_pm.cc",

        "acl/btm_pm.cc",

        "btm/btm_sco.cc",

        "btm/btm_sco.cc",

        "btm/btm_sco_hci.cc",

        "btm/btm_sco_hci.cc",

        "btm/btm_sco_hfp_hal.cc",

        "btm/btm_iso.cc",

        "btm/btm_iso.cc",

        "btm/btm_sec.cc",

        "btm/btm_sec.cc",

        "btm/btm_scn.cc",

        "btm/btm_scn.cc",
@@ -819,6 +820,7 @@ cc_test { 
        "btm/btm_main.cc",

        "btm/btm_main.cc",

        "btm/btm_sco.cc",

        "btm/btm_sco.cc",

        "btm/btm_sco_hci.cc",

        "btm/btm_sco_hci.cc",

        "btm/btm_sco_hfp_hal.cc",

        "btm/btm_scn.cc",

        "btm/btm_scn.cc",

        "btm/btm_sec.cc",

        "btm/btm_sec.cc",

        "metrics/stack_metrics_logging.cc",

        "metrics/stack_metrics_logging.cc",

system/stack/BUILD.gn

+1 −0
Original line number Original line Diff line number Diff line
@@ -122,6 +122,7 @@ source_set("stack") { 
    "btm/btm_scn.cc",

    "btm/btm_scn.cc",

    "btm/btm_sco.cc",

    "btm/btm_sco.cc",

    "btm/btm_sco_hci.cc",

    "btm/btm_sco_hci.cc",

    "btm/btm_sco_hfp_hal_linux.cc",

    "btm/btm_sec.cc",

    "btm/btm_sec.cc",

    "btu/btu_hcif.cc",

    "btu/btu_hcif.cc",

    "btu/btu_task.cc",

    "btu/btu_task.cc",

system/stack/btm/btm_sco.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <cstdint>

#include <cstdint>

#include <string>

#include <string>





#include "btm_sco_hfp_hal.h"

#include "device/include/esco_parameters.h"

#include "device/include/esco_parameters.h"

#include "stack/include/btm_api_types.h"

#include "stack/include/btm_api_types.h"
@@ -137,6 +138,7 @@ typedef struct { 




  void Init() {

  void Init() {

    def_esco_parms = esco_parameters_for_codec(ESCO_CODEC_CVSD_S3);

    def_esco_parms = esco_parameters_for_codec(ESCO_CODEC_CVSD_S3);

    hfp_hal_interface::init();

  }

  }





  void Free() { bluetooth::audio::sco::cleanup(); }

  void Free() { bluetooth::audio::sco::cleanup(); }

system/stack/btm/btm_sco_hfp_hal.cc

0 → 100644
+90 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright 2022 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.

 */



#include "btm_sco_hfp_hal.h"



#include <vector>



#include "device/include/esco_parameters.h"



namespace hfp_hal_interface {

namespace {

bool offload_supported = true;

bool offload_enabled = true;

std::vector<bt_codec> cached_codecs;

}  // namespace



// Android implementation only has consts. Initialize CVSD and MSBC to PCM

// offloaded defaults.

void init() {

  bt_codec cvsd = {

      .codec = codec::CVSD,

      .data_path = ESCO_DATA_PATH_PCM,

  };



  bt_codec msbc = {

      .codec = codec::MSBC,

      .data_path = ESCO_DATA_PATH_PCM,

  };



  cached_codecs.clear();

  cached_codecs.emplace_back(cvsd);

  cached_codecs.emplace_back(msbc);

}



// Android statically compiles WBS support.

bool get_wbs_supported() { return !DISABLE_WBS; }



// Checks the supported codecs

bt_codecs get_codec_capabilities(uint64_t codecs) {

  bt_codecs codec_list = {.offload_capable = offload_supported};



  for (auto c : cached_codecs) {

    if (c.codec & codecs) {

      codec_list.codecs.push_back(c);

    }

  }



  return codec_list;

}



// Check if hardware offload is supported

bool get_offload_supported() { return offload_supported; }



// Check if hardware offload is enabled

bool get_offload_enabled() { return offload_supported && offload_enabled; }



// Set offload enable/disable

bool enable_offload(bool enable) {

  if (!offload_supported) {

    return false;

  }

  offload_enabled = enable;

  return true;

}



// Notify the codec datapath to lower layer for offload mode.

bool set_codec_datapath(int codec) { return true; }



// No packet size limits on Android since it will be offloaded.

int get_packet_size(int codec) { return kDefaultPacketSize; }



void notify_sco_connection_change(RawAddress device, bool is_connected,

                                  int codec) {

  // Do nothing since this is handled by Android's audio hidl.

}



}  // namespace hfp_hal_interface

system/stack/btm/btm_sco_hfp_hal.h

0 → 100644
+80 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright 2022 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.

 */



#pragma once



#include <stdint.h>



#include <vector>



#include "bt_target.h"

#include "raw_address.h"



// Used by the Bluetooth stack to get WBS supported and codec, or notify SCO

// connection change to lower layer (kernel) when SCO-over-HCI is used. So far

// ChromeOS uses SCO-over-HCI; usually Android phone uses hardware SCO route so

// it doesn't apply here.

namespace hfp_hal_interface {

enum codec : uint64_t {

  CVSD = 1 << 0,

  MSBC_TRANSPARENT = 1 << 1,

  MSBC = 1 << 2,

};



struct bt_codec {

  codec codec;

  uint8_t data_path;

  std::vector<uint8_t> data;

};



struct bt_codecs {

  bool offload_capable;

  std::vector<bt_codec> codecs;

};



// Use default packet size for codec if this value is given.

constexpr int kDefaultPacketSize = 0;



// Initialize the SCO HFP HAL module

void init();



// Check if wideband speech is supported on local device.

bool get_wbs_supported();



// Checks the details of the codecs (specified as a bitmask of enum codec).

bt_codecs get_codec_capabilities(uint64_t codecs);



// Check if hardware offload is supported.

bool get_offload_supported();



// Check if hardware offload is enabled.

bool get_offload_enabled();



// Set offload enable/disable.

bool enable_offload(bool enable);



// Notify the codec datapath to lower layer for offload mode.

// TODO - This api may become unnecessary depending on how this is integrated.

bool set_codec_datapath(int codec);



// Get the maximum supported packet size from the lower layer.

int get_packet_size(int codec);



// Notify the lower layer about SCO connection change.

void notify_sco_connection_change(RawAddress device, bool is_connected,

                                  int codec);



}  // namespace hfp_hal_interface