Merge 32336a56e5d1852850d84aea35ab584ed6ce84a2 on remote branch

Change-Id: I37ba79726c479d04e9162c56d714be12964d0ad5

1 files changed, 312 insertions, 0 deletions

diff --git a/bluetooth/audio/utils/aidl_session/BluetoothLeAudioCodecsProvider.cpp b/bluetooth/audio/utils/aidl_session/BluetoothLeAudioCodecsProvider.cpp
new file mode 100644
index 0000000000..bf492706c8
--- /dev/null
+++ b/bluetooth/audio/utils/aidl_session/BluetoothLeAudioCodecsProvider.cpp
@@ -0,0 +1,312 @@
+/*
+ * 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 "BTAudioCodecsProviderAidl"
+
+#include "BluetoothLeAudioCodecsProvider.h"
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace bluetooth {
+namespace audio {
+
+static const char* kLeAudioCodecCapabilitiesFile =
+    "/vendor/etc/le_audio_codec_capabilities.xml";
+
+static const AudioLocation kStereoAudio = static_cast<AudioLocation>(
+    static_cast<uint8_t>(AudioLocation::FRONT_LEFT) |
+    static_cast<uint8_t>(AudioLocation::FRONT_RIGHT));
+static const AudioLocation kMonoAudio = AudioLocation::UNKNOWN;
+
+static std::vector<LeAudioCodecCapabilitiesSetting> leAudioCodecCapabilities;
+
+std::vector<LeAudioCodecCapabilitiesSetting>
+BluetoothLeAudioCodecsProvider::GetLeAudioCodecCapabilities() {
+  if (!leAudioCodecCapabilities.empty()) {
+    return leAudioCodecCapabilities;
+  }
+
+  const auto le_audio_offload_setting =
+      setting::readLeAudioOffloadSetting(kLeAudioCodecCapabilitiesFile);
+  if (!le_audio_offload_setting.has_value()) {
+    LOG(ERROR) << __func__ << ": Failed to read "
+               << kLeAudioCodecCapabilitiesFile;
+    return {};
+  }
+
+  std::vector<setting::Scenario> supported_scenarios =
+      GetScenarios(le_audio_offload_setting);
+  if (supported_scenarios.empty()) {
+    LOG(ERROR) << __func__ << ": No scenarios in "
+               << kLeAudioCodecCapabilitiesFile;
+    return {};
+  }
+
+  UpdateConfigurationsToMap(le_audio_offload_setting);
+  if (configuration_map_.empty()) {
+    LOG(ERROR) << __func__ << ": No configurations in "
+               << kLeAudioCodecCapabilitiesFile;
+    return {};
+  }
+
+  UpdateCodecConfigurationsToMap(le_audio_offload_setting);
+  if (codec_configuration_map_.empty()) {
+    LOG(ERROR) << __func__ << ": No codec configurations in "
+               << kLeAudioCodecCapabilitiesFile;
+    return {};
+  }
+
+  UpdateStrategyConfigurationsToMap(le_audio_offload_setting);
+  if (strategy_configuration_map_.empty()) {
+    LOG(ERROR) << __func__ << ": No strategy configurations in "
+               << kLeAudioCodecCapabilitiesFile;
+    return {};
+  }
+
+  leAudioCodecCapabilities =
+      ComposeLeAudioCodecCapabilities(supported_scenarios);
+  return leAudioCodecCapabilities;
+}
+
+std::vector<setting::Scenario> BluetoothLeAudioCodecsProvider::GetScenarios(
+    const std::optional<setting::LeAudioOffloadSetting>&
+        le_audio_offload_setting) {
+  std::vector<setting::Scenario> supported_scenarios;
+  if (le_audio_offload_setting->hasScenarioList()) {
+    for (const auto& scenario_list :
+         le_audio_offload_setting->getScenarioList()) {
+      if (!scenario_list.hasScenario()) {
+        continue;
+      }
+      for (const auto& scenario : scenario_list.getScenario()) {
+        if (scenario.hasEncode() && scenario.hasDecode()) {
+          supported_scenarios.push_back(scenario);
+        }
+      }
+    }
+  }
+  return supported_scenarios;
+}
+
+void BluetoothLeAudioCodecsProvider::UpdateConfigurationsToMap(
+    const std::optional<setting::LeAudioOffloadSetting>&
+        le_audio_offload_setting) {
+  if (le_audio_offload_setting->hasConfigurationList()) {
+    for (const auto& configuration_list :
+         le_audio_offload_setting->getConfigurationList()) {
+      if (!configuration_list.hasConfiguration()) {
+        continue;
+      }
+      for (const auto& configuration : configuration_list.getConfiguration()) {
+        if (configuration.hasName() && configuration.hasCodecConfiguration() &&
+            configuration.hasStrategyConfiguration()) {
+          configuration_map_.insert(
+              make_pair(configuration.getName(), configuration));
+        }
+      }
+    }
+  }
+}
+
+void BluetoothLeAudioCodecsProvider::UpdateCodecConfigurationsToMap(
+    const std::optional<setting::LeAudioOffloadSetting>&
+        le_audio_offload_setting) {
+  if (le_audio_offload_setting->hasCodecConfigurationList()) {
+    for (const auto& codec_configuration_list :
+         le_audio_offload_setting->getCodecConfigurationList()) {
+      if (!codec_configuration_list.hasCodecConfiguration()) {
+        continue;
+      }
+      for (const auto& codec_configuration :
+           codec_configuration_list.getCodecConfiguration()) {
+        if (IsValidCodecConfiguration(codec_configuration)) {
+          codec_configuration_map_.insert(
+              make_pair(codec_configuration.getName(), codec_configuration));
+        }
+      }
+    }
+  }
+}
+
+void BluetoothLeAudioCodecsProvider::UpdateStrategyConfigurationsToMap(
+    const std::optional<setting::LeAudioOffloadSetting>&
+        le_audio_offload_setting) {
+  if (le_audio_offload_setting->hasStrategyConfigurationList()) {
+    for (const auto& strategy_configuration_list :
+         le_audio_offload_setting->getStrategyConfigurationList()) {
+      if (!strategy_configuration_list.hasStrategyConfiguration()) {
+        continue;
+      }
+      for (const auto& strategy_configuration :
+           strategy_configuration_list.getStrategyConfiguration()) {
+        if (IsValidStrategyConfiguration(strategy_configuration)) {
+          strategy_configuration_map_.insert(make_pair(
+              strategy_configuration.getName(), strategy_configuration));
+        }
+      }
+    }
+  }
+}
+
+std::vector<LeAudioCodecCapabilitiesSetting>
+BluetoothLeAudioCodecsProvider::ComposeLeAudioCodecCapabilities(
+    const std::vector<setting::Scenario>& supported_scenarios) {
+  std::vector<LeAudioCodecCapabilitiesSetting> le_audio_codec_capabilities;
+  for (const auto& scenario : supported_scenarios) {
+    UnicastCapability unicast_encode_capability =
+        GetUnicastCapability(scenario.getEncode());
+    UnicastCapability unicast_decode_capability =
+        GetUnicastCapability(scenario.getDecode());
+    // encode and decode cannot be unknown at the same time
+    if (unicast_encode_capability.codecType == CodecType::UNKNOWN &&
+        unicast_decode_capability.codecType == CodecType::UNKNOWN) {
+      continue;
+    }
+    BroadcastCapability broadcast_capability = {.codecType =
+                                                    CodecType::UNKNOWN};
+    le_audio_codec_capabilities.push_back(
+        {.unicastEncodeCapability = unicast_encode_capability,
+         .unicastDecodeCapability = unicast_decode_capability,
+         .broadcastCapability = broadcast_capability});
+  }
+  return le_audio_codec_capabilities;
+}
+
+UnicastCapability BluetoothLeAudioCodecsProvider::GetUnicastCapability(
+    const std::string& coding_direction) {
+  if (coding_direction == "invalid") {
+    return {.codecType = CodecType::UNKNOWN};
+  }
+
+  auto configuration_iter = configuration_map_.find(coding_direction);
+  if (configuration_iter == configuration_map_.end()) {
+    return {.codecType = CodecType::UNKNOWN};
+  }
+
+  auto codec_configuration_iter = codec_configuration_map_.find(
+      configuration_iter->second.getCodecConfiguration());
+  if (codec_configuration_iter == codec_configuration_map_.end()) {
+    return {.codecType = CodecType::UNKNOWN};
+  }
+
+  auto strategy_configuration_iter = strategy_configuration_map_.find(
+      configuration_iter->second.getStrategyConfiguration());
+  if (strategy_configuration_iter == strategy_configuration_map_.end()) {
+    return {.codecType = CodecType::UNKNOWN};
+  }
+
+  CodecType codec_type =
+      GetCodecType(codec_configuration_iter->second.getCodec());
+  if (codec_type == CodecType::LC3) {
+    return ComposeUnicastCapability(
+        codec_type,
+        GetAudioLocation(
+            strategy_configuration_iter->second.getAudioLocation()),
+        strategy_configuration_iter->second.getConnectedDevice(),
+        strategy_configuration_iter->second.getChannelCount(),
+        ComposeLc3Capability(codec_configuration_iter->second));
+  }
+  return {.codecType = CodecType::UNKNOWN};
+}
+
+template <class T>
+UnicastCapability BluetoothLeAudioCodecsProvider::ComposeUnicastCapability(
+    const CodecType& codec_type, const AudioLocation& audio_location,
+    const uint8_t& device_cnt, const uint8_t& channel_count,
+    const T& capability) {
+  return {
+      .codecType = codec_type,
+      .supportedChannel = audio_location,
+      .deviceCount = device_cnt,
+      .channelCountPerDevice = channel_count,
+      .leAudioCodecCapabilities =
+          UnicastCapability::LeAudioCodecCapabilities(capability),
+  };
+}
+
+Lc3Capabilities BluetoothLeAudioCodecsProvider::ComposeLc3Capability(
+    const setting::CodecConfiguration& codec_configuration) {
+  return {.samplingFrequencyHz = {codec_configuration.getSamplingFrequency()},
+          .frameDurationUs = {codec_configuration.getFrameDurationUs()},
+          .octetsPerFrame = {codec_configuration.getOctetsPerCodecFrame()}};
+}
+
+AudioLocation BluetoothLeAudioCodecsProvider::GetAudioLocation(
+    const setting::AudioLocation& audio_location) {
+  switch (audio_location) {
+    case setting::AudioLocation::MONO:
+      return kMonoAudio;
+    case setting::AudioLocation::STEREO:
+      return kStereoAudio;
+    default:
+      return AudioLocation::UNKNOWN;
+  }
+}
+
+CodecType BluetoothLeAudioCodecsProvider::GetCodecType(
+    const setting::CodecType& codec_type) {
+  switch (codec_type) {
+    case setting::CodecType::LC3:
+      return CodecType::LC3;
+    default:
+      return CodecType::UNKNOWN;
+  }
+}
+
+bool BluetoothLeAudioCodecsProvider::IsValidCodecConfiguration(
+    const setting::CodecConfiguration& codec_configuration) {
+  return codec_configuration.hasName() && codec_configuration.hasCodec() &&
+         codec_configuration.hasSamplingFrequency() &&
+         codec_configuration.hasFrameDurationUs() &&
+         codec_configuration.hasOctetsPerCodecFrame();
+}
+
+bool BluetoothLeAudioCodecsProvider::IsValidStrategyConfiguration(
+    const setting::StrategyConfiguration& strategy_configuration) {
+  if (!strategy_configuration.hasName() ||
+      !strategy_configuration.hasAudioLocation() ||
+      !strategy_configuration.hasConnectedDevice() ||
+      !strategy_configuration.hasChannelCount()) {
+    return false;
+  }
+  if (strategy_configuration.getAudioLocation() ==
+      setting::AudioLocation::STEREO) {
+    if ((strategy_configuration.getConnectedDevice() == 2 &&
+         strategy_configuration.getChannelCount() == 1) ||
+        (strategy_configuration.getConnectedDevice() == 1 &&
+         strategy_configuration.getChannelCount() == 2)) {
+      // Stereo
+      // 1. two connected device, one for L one for R
+      // 2. one connected device for both L and R
+      return true;
+    }
+  } else if (strategy_configuration.getAudioLocation() ==
+             setting::AudioLocation::MONO) {
+    if (strategy_configuration.getConnectedDevice() == 1 &&
+        strategy_configuration.getChannelCount() == 1) {
+      // Mono
+      return true;
+    }
+  }
+  return false;
+}
+
+}  // namespace audio
+}  // namespace bluetooth
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl