/*
* Copyright 2019 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 "BTAudioClientHearingAid"
#include "hearing_aid_software_encoding.h"
#include "client_interface.h"
#include "audio_hearing_aid_hw/include/audio_hearing_aid_hw.h"
#include "osi/include/log.h"
#include "osi/include/properties.h"
namespace {
using ::android::hardware::bluetooth::audio::V2_0::CodecType;
using ::bluetooth::audio::AudioConfiguration;
using ::bluetooth::audio::BitsPerSample;
using ::bluetooth::audio::BluetoothAudioCtrlAck;
using ::bluetooth::audio::ChannelMode;
using ::bluetooth::audio::PcmParameters;
using ::bluetooth::audio::SampleRate;
using ::bluetooth::audio::SessionType;
using ::bluetooth::audio::hearing_aid::StreamCallbacks;
// Transport implementation for Hearing Aids
class HearingAidTransport
: public bluetooth::audio::IBluetoothTransportInstance {
public:
HearingAidTransport(StreamCallbacks stream_cb)
: IBluetoothTransportInstance(
SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH, {}),
stream_cb_(std::move(stream_cb)),
remote_delay_report_ms_(0),
total_bytes_read_(0),
data_position_({}){};
BluetoothAudioCtrlAck StartRequest() override {
LOG(INFO) << __func__;
if (stream_cb_.on_resume_(true)) {
return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
}
return BluetoothAudioCtrlAck::FAILURE;
}
BluetoothAudioCtrlAck SuspendRequest() override {
LOG(INFO) << __func__;
if (stream_cb_.on_suspend_()) {
uint8_t p_buf[AUDIO_STREAM_OUTPUT_BUFFER_SZ * 2];
::bluetooth::audio::hearing_aid::read(p_buf, sizeof(p_buf));
return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
} else {
return BluetoothAudioCtrlAck::FAILURE;
}
}
void StopRequest() override {
LOG(INFO) << __func__;
if (stream_cb_.on_suspend_()) {
// flush
uint8_t p_buf[AUDIO_STREAM_OUTPUT_BUFFER_SZ * 2];
::bluetooth::audio::hearing_aid::read(p_buf, sizeof(p_buf));
}
}
bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
uint64_t* total_bytes_read,
timespec* data_position) override {
VLOG(2) << __func__ << ": data=" << total_bytes_read_
<< " byte(s), timestamp=" << data_position_.tv_sec << "."
<< data_position_.tv_nsec
<< "s, delay report=" << remote_delay_report_ms_ << " msec.";
if (remote_delay_report_ns != nullptr) {
*remote_delay_report_ns = remote_delay_report_ms_ * 1000000u;
}
if (total_bytes_read != nullptr) *total_bytes_read = total_bytes_read_;
if (data_position != nullptr) *data_position = data_position_;
return true;
}
void MetadataChanged(const source_metadata_t& source_metadata) override {
auto track_count = source_metadata.track_count;
auto tracks = source_metadata.tracks;
LOG(INFO) << __func__ << ": " << track_count << " track(s) received";
while (track_count) {
VLOG(1) << __func__ << ": usage=" << tracks->usage
<< ", content_type=" << tracks->content_type
<< ", gain=" << tracks->gain;
--track_count;
++tracks;
}
}
void ResetPresentationPosition() override {
VLOG(2) << __func__ << ": called.";
remote_delay_report_ms_ = 0;
total_bytes_read_ = 0;
data_position_ = {};
}
void LogBytesRead(size_t bytes_read) override {
if (bytes_read) {
total_bytes_read_ += bytes_read;
clock_gettime(CLOCK_MONOTONIC, &data_position_);
}
}
void SetRemoteDelay(uint16_t delay_report_ms) {
LOG(INFO) << __func__ << ": delay_report=" << delay_report_ms << " msec";
remote_delay_report_ms_ = delay_report_ms;
}
private:
StreamCallbacks stream_cb_;
uint16_t remote_delay_report_ms_;
uint64_t total_bytes_read_;
timespec data_position_;
};
bool HearingAidGetSelectedHalPcmConfig(PcmParameters* hal_pcm_config) {
if (hal_pcm_config == nullptr) return false;
// TODO: we only support one config for now!
hal_pcm_config->sampleRate = SampleRate::RATE_16000;
hal_pcm_config->bitsPerSample = BitsPerSample::BITS_16;
hal_pcm_config->channelMode = ChannelMode::STEREO;
return true;
}
// Sink instance of Hearing Aids to provide call-in APIs for Bluetooth Audio Hal
HearingAidTransport* hearing_aid_sink = nullptr;
// Common interface to call-out into Bluetooth Audio Hal
bluetooth::audio::BluetoothAudioClientInterface*
hearing_aid_hal_clientinterface = nullptr;
bool btaudio_hearing_aid_disabled = false;
bool is_configured = false;
// Save the value if the remote reports its delay before hearing_aid_sink is
// initialized
uint16_t remote_delay_ms = 0;
bool is_hal_2_0_force_disabled() {
if (!is_configured) {
btaudio_hearing_aid_disabled = osi_property_get_bool(BLUETOOTH_AUDIO_HAL_PROP_DISABLED, false);
is_configured = true;
}
return btaudio_hearing_aid_disabled;
}
} // namespace
namespace bluetooth {
namespace audio {
namespace hearing_aid {
bool is_hal_2_0_enabled() { return hearing_aid_hal_clientinterface != nullptr; }
bool init(StreamCallbacks stream_cb,
bluetooth::common::MessageLoopThread* message_loop) {
LOG(INFO) << __func__;
if (is_hal_2_0_force_disabled()) {
LOG(ERROR) << __func__ << ": BluetoothAudio HAL is disabled";
return false;
}
hearing_aid_sink = new HearingAidTransport(std::move(stream_cb));
hearing_aid_hal_clientinterface =
new bluetooth::audio::BluetoothAudioClientInterface(hearing_aid_sink,
message_loop);
if (!hearing_aid_hal_clientinterface->IsValid()) {
LOG(WARNING) << __func__ << ": BluetoothAudio HAL for Hearing Aid is invalid?!";
delete hearing_aid_hal_clientinterface;
hearing_aid_hal_clientinterface = nullptr;
delete hearing_aid_sink;
hearing_aid_sink = nullptr;
return false;
}
if (remote_delay_ms != 0) {
LOG(INFO) << __func__ << ": restore DELAY " << remote_delay_ms << " ms";
hearing_aid_sink->SetRemoteDelay(remote_delay_ms);
remote_delay_ms = 0;
}
return true;
}
void cleanup() {
LOG(INFO) << __func__;
if (!is_hal_2_0_enabled()) return;
end_session();
delete hearing_aid_hal_clientinterface;
hearing_aid_hal_clientinterface = nullptr;
delete hearing_aid_sink;
hearing_aid_sink = nullptr;
remote_delay_ms = 0;
}
void start_session() {
LOG(INFO) << __func__;
if (!is_hal_2_0_enabled()) return;
AudioConfiguration audio_config;
PcmParameters pcm_config{};
if (!HearingAidGetSelectedHalPcmConfig(&pcm_config)) {
LOG(ERROR) << __func__ << ": cannot get PCM config";
return;
}
audio_config.pcmConfig(pcm_config);
if (!hearing_aid_hal_clientinterface->UpdateAudioConfig(audio_config)) {
LOG(ERROR) << __func__ << ": cannot update audio config to HAL";
return;
}
hearing_aid_hal_clientinterface->StartSession();
}
void end_session() {
LOG(INFO) << __func__;
if (!is_hal_2_0_enabled()) return;
hearing_aid_hal_clientinterface->EndSession();
}
size_t read(uint8_t* p_buf, uint32_t len) {
if (!is_hal_2_0_enabled()) return 0;
return hearing_aid_hal_clientinterface->ReadAudioData(p_buf, len);
}
// Update Hearing Aids delay report to BluetoothAudio HAL
void set_remote_delay(uint16_t delay_report_ms) {
if (!is_hal_2_0_enabled()) {
LOG(INFO) << __func__ << ": not ready for DelayReport " << delay_report_ms
<< " ms";
remote_delay_ms = delay_report_ms;
return;
}
LOG(INFO) << __func__ << ": delay_report_ms=" << delay_report_ms << " ms";
hearing_aid_sink->SetRemoteDelay(delay_report_ms);
}
} // namespace hearing_aid
} // namespace audio
} // namespace bluetooth