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/*
* Copyright (C) 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.
*/
#define LOG_TAG "BTAudioProviderLeAudioSW"
#include "LeAudioSoftwareAudioProvider.h"
#include <BluetoothAudioCodecs.h>
#include <BluetoothAudioSessionReport.h>
#include <android-base/logging.h>
#include <cstdint>
namespace aidl {
namespace android {
namespace hardware {
namespace bluetooth {
namespace audio {
static constexpr uint32_t kBufferOutCount = 2; // two frame buffer
static constexpr uint32_t kBufferInCount = 2; // two frame buffer
inline uint32_t channel_mode_to_channel_count(ChannelMode channel_mode) {
switch (channel_mode) {
case ChannelMode::MONO:
return 1;
case ChannelMode::STEREO:
return 2;
default:
return 0;
}
return 0;
}
LeAudioSoftwareOutputAudioProvider::LeAudioSoftwareOutputAudioProvider()
: LeAudioSoftwareAudioProvider() {
session_type_ = SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH;
}
LeAudioSoftwareInputAudioProvider::LeAudioSoftwareInputAudioProvider()
: LeAudioSoftwareAudioProvider() {
session_type_ = SessionType::LE_AUDIO_SOFTWARE_DECODING_DATAPATH;
}
LeAudioSoftwareBroadcastAudioProvider::LeAudioSoftwareBroadcastAudioProvider()
: LeAudioSoftwareAudioProvider() {
session_type_ = SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH;
}
LeAudioSoftwareAudioProvider::LeAudioSoftwareAudioProvider()
: BluetoothAudioProvider(), data_mq_(nullptr) {}
bool LeAudioSoftwareAudioProvider::isValid(const SessionType& sessionType) {
return (sessionType == session_type_);
}
ndk::ScopedAStatus LeAudioSoftwareAudioProvider::startSession(
const std::shared_ptr<IBluetoothAudioPort>& host_if,
const AudioConfiguration& audio_config,
const std::vector<LatencyMode>& latency_modes, DataMQDesc* _aidl_return) {
if (audio_config.getTag() != AudioConfiguration::pcmConfig) {
LOG(WARNING) << __func__ << " - Invalid Audio Configuration="
<< audio_config.toString();
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
const auto& pcm_config = audio_config.get<AudioConfiguration::pcmConfig>();
if (!BluetoothAudioCodecs::IsSoftwarePcmConfigurationValid(pcm_config)) {
LOG(WARNING) << __func__ << " - Unsupported PCM Configuration="
<< pcm_config.toString();
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
uint32_t buffer_modifier = 0;
if (session_type_ == SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH ||
session_type_ ==
SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH)
buffer_modifier = kBufferOutCount;
else if (session_type_ == SessionType::LE_AUDIO_SOFTWARE_DECODING_DATAPATH)
buffer_modifier = kBufferInCount;
uint32_t data_mq_size =
(ceil(pcm_config.sampleRateHz) / 1000) *
channel_mode_to_channel_count(pcm_config.channelMode) *
(pcm_config.bitsPerSample / 8) * (pcm_config.dataIntervalUs / 1000) *
buffer_modifier;
if (data_mq_size <= 0) {
LOG(ERROR) << __func__ << "Unexpected audio buffer size: " << data_mq_size
<< ", SampleRateHz: " << pcm_config.sampleRateHz
<< ", ChannelMode: " << toString(pcm_config.channelMode)
<< ", BitsPerSample: "
<< static_cast<int>(pcm_config.bitsPerSample)
<< ", DataIntervalUs: " << pcm_config.dataIntervalUs
<< ", SessionType: " << toString(session_type_);
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
LOG(INFO) << __func__ << " - size of audio buffer " << data_mq_size
<< " byte(s)";
std::unique_ptr<DataMQ> temp_data_mq(
new DataMQ(data_mq_size, /* EventFlag */ true));
if (temp_data_mq == nullptr || !temp_data_mq->isValid()) {
ALOGE_IF(!temp_data_mq, "failed to allocate data MQ");
ALOGE_IF(temp_data_mq && !temp_data_mq->isValid(), "data MQ is invalid");
*_aidl_return = DataMQDesc();
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
data_mq_ = std::move(temp_data_mq);
return BluetoothAudioProvider::startSession(
host_if, audio_config, latency_modes, _aidl_return);
}
ndk::ScopedAStatus LeAudioSoftwareAudioProvider::onSessionReady(
DataMQDesc* _aidl_return) {
if (data_mq_ == nullptr || !data_mq_->isValid()) {
*_aidl_return = DataMQDesc();
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
}
*_aidl_return = data_mq_->dupeDesc();
auto desc = data_mq_->dupeDesc();
BluetoothAudioSessionReport::OnSessionStarted(
session_type_, stack_iface_, &desc, *audio_config_, latency_modes_);
return ndk::ScopedAStatus::ok();
}
} // namespace audio
} // namespace bluetooth
} // namespace hardware
} // namespace android
} // namespace aidl
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