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/*
* Copyright 2020 HIMSA II K/S - www.himsa.com. Represented by EHIMA -
* www.ehima.com
*
* 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 "BTAudioProviderLeAudio"
#include "LeAudioAudioProvider.h"
#include <android-base/logging.h>
#include "BluetoothAudioSessionReport_2_1.h"
#include "BluetoothAudioSupportedCodecsDB_2_1.h"
namespace android {
namespace hardware {
namespace bluetooth {
namespace audio {
namespace V2_1 {
namespace implementation {
using ::android::bluetooth::audio::BluetoothAudioSessionReport_2_1;
using ::android::hardware::Void;
using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
using ::android::hardware::bluetooth::audio::V2_0::ChannelMode;
using ::android::hardware::bluetooth::audio::V2_1::SampleRate;
static constexpr uint32_t kBufferOutCount = 2; // two frame buffer
static constexpr uint32_t kBufferInCount = 2; // two frame buffer
LeAudioOutputAudioProvider::LeAudioOutputAudioProvider()
: LeAudioAudioProvider() {
session_type_ = SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH;
}
LeAudioInputAudioProvider::LeAudioInputAudioProvider()
: LeAudioAudioProvider() {
session_type_ = SessionType::LE_AUDIO_SOFTWARE_DECODED_DATAPATH;
}
LeAudioAudioProvider::LeAudioAudioProvider()
: BluetoothAudioProvider(), mDataMQ(nullptr) {}
bool LeAudioAudioProvider::isValid(const V2_0::SessionType& sessionType) {
LOG(ERROR) << __func__ << ", invalid session type for Le Audio provider: "
<< toString(sessionType);
return false;
}
bool LeAudioAudioProvider::isValid(const SessionType& sessionType) {
return (sessionType == session_type_);
}
Return<void> LeAudioAudioProvider::startSession_2_1(
const sp<V2_0::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::pcmConfig) {
LOG(WARNING) << __func__
<< " - Invalid Audio Configuration=" << toString(audioConfig);
_hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,
DataMQ::Descriptor());
return Void();
} else if (!android::bluetooth::audio::IsSoftwarePcmConfigurationValid_2_1(
audioConfig.pcmConfig())) {
LOG(WARNING) << __func__ << " - Unsupported PCM Configuration="
<< toString(audioConfig.pcmConfig());
_hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,
DataMQ::Descriptor());
return Void();
}
uint32_t kDataMqSize = 0;
switch (audioConfig.pcmConfig().sampleRate) {
case SampleRate::RATE_8000:
kDataMqSize = 8000;
break;
case SampleRate::RATE_16000:
kDataMqSize = 16000;
break;
case SampleRate::RATE_24000:
kDataMqSize = 24000;
break;
case SampleRate::RATE_32000:
kDataMqSize = 32000;
break;
case SampleRate::RATE_44100:
kDataMqSize = 44100;
break;
case SampleRate::RATE_48000:
kDataMqSize = 48000;
break;
default:
LOG(WARNING) << __func__ << " - Unsupported sampling frequency="
<< toString(audioConfig.pcmConfig());
_hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,
DataMQ::Descriptor());
return Void();
}
/* Number of samples per millisecond */
kDataMqSize = ceil(kDataMqSize / 1000);
switch (audioConfig.pcmConfig().channelMode) {
case ChannelMode::MONO:
break;
case ChannelMode::STEREO:
kDataMqSize *= 2;
break;
default:
/* This should never happen it would be caught while validating
* parameters.
*/
break;
}
switch (audioConfig.pcmConfig().bitsPerSample) {
case BitsPerSample::BITS_16:
kDataMqSize *= 2;
break;
case BitsPerSample::BITS_24:
kDataMqSize *= 3;
break;
case BitsPerSample::BITS_32:
kDataMqSize *= 4;
break;
default:
/* This should never happen it would be caught while validating
* parameters.
*/
break;
}
if (session_type_ == SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH)
kDataMqSize *= kBufferOutCount;
else if (session_type_ == SessionType::LE_AUDIO_SOFTWARE_DECODED_DATAPATH)
kDataMqSize *= kBufferInCount;
else
LOG(WARNING) << __func__ << ", default single buffer used";
kDataMqSize *= audioConfig.pcmConfig().dataIntervalUs / 1000;
LOG(INFO) << __func__ << " - size of audio buffer " << kDataMqSize
<< " byte(s)";
std::unique_ptr<DataMQ> tempDataMQ(
new DataMQ(kDataMqSize, /* EventFlag */ true));
if (tempDataMQ && tempDataMQ->isValid()) {
mDataMQ = std::move(tempDataMQ);
} else {
ALOGE_IF(!tempDataMQ, "failed to allocate data MQ");
ALOGE_IF(tempDataMQ && !tempDataMQ->isValid(), "data MQ is invalid");
_hidl_cb(BluetoothAudioStatus::FAILURE, DataMQ::Descriptor());
return Void();
}
return BluetoothAudioProvider::startSession_2_1(hostIf, audioConfig,
_hidl_cb);
}
Return<void> LeAudioAudioProvider::onSessionReady(startSession_cb _hidl_cb) {
if (mDataMQ && mDataMQ->isValid()) {
BluetoothAudioSessionReport_2_1::OnSessionStarted(
session_type_, stack_iface_, mDataMQ->getDesc(), audio_config_);
_hidl_cb(BluetoothAudioStatus::SUCCESS, *mDataMQ->getDesc());
} else {
_hidl_cb(BluetoothAudioStatus::FAILURE, DataMQ::Descriptor());
}
return Void();
}
} // namespace implementation
} // namespace V2_1
} // namespace audio
} // namespace bluetooth
} // namespace hardware
} // namespace android
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