/* * Copyright (C) 2021 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 #include #include #include #include "PropertyUtils.h" namespace android { using media::audio::common::AudioMMapPolicy; using media::audio::common::AudioMMapPolicyType; using media::audio::common::AudioMMapPolicyInfo; std::string getMmapPolicyProperty(AudioMMapPolicyType policyType) { switch (policyType) { case AudioMMapPolicyType::DEFAULT: return "aaudio.mmap_policy"; case AudioMMapPolicyType::EXCLUSIVE: return "aaudio.mmap_exclusive_policy"; default: return ""; } } int getDefaultPolicyFromType(AudioMMapPolicyType policyType) { switch (policyType) { case AudioMMapPolicyType::EXCLUSIVE: return AAUDIO_UNSPECIFIED; case AudioMMapPolicyType::DEFAULT: default: return AAUDIO_POLICY_NEVER; } } AudioMMapPolicy legacy2aidl_aaudio_policy_t_AudioMMapPolicy(aaudio_policy_t legacy) { switch (legacy) { case AAUDIO_POLICY_NEVER: return AudioMMapPolicy::NEVER; case AAUDIO_POLICY_AUTO: return AudioMMapPolicy::AUTO; case AAUDIO_POLICY_ALWAYS: return AudioMMapPolicy::ALWAYS; case AAUDIO_UNSPECIFIED: return AudioMMapPolicy::UNSPECIFIED; default: ALOGE("%s unknown aaudio policy: %d", __func__, legacy); return AudioMMapPolicy::UNSPECIFIED; } } status_t getMmapPolicyInfosFromSystemProperty( AudioMMapPolicyType policyType, std::vector *policyInfos) { AudioMMapPolicyInfo policyInfo; const std::string propertyStr = getMmapPolicyProperty(policyType); if (propertyStr.empty()) { return BAD_VALUE; } policyInfo.mmapPolicy = legacy2aidl_aaudio_policy_t_AudioMMapPolicy( property_get_int32(propertyStr.c_str(), getDefaultPolicyFromType(policyType))); policyInfos->push_back(policyInfo); return NO_ERROR; } int32_t getAAudioMixerBurstCountFromSystemProperty() { static const int32_t sDefaultBursts = 2; // arbitrary, use 2 for double buffered static const int32_t sMaxBursts = 1024; // arbitrary static const char* sPropMixerBursts = "aaudio.mixer_bursts"; int32_t prop = property_get_int32(sPropMixerBursts, sDefaultBursts); if (prop <= 0 || prop > sMaxBursts) { ALOGE("%s: invalid value %d, use default %d", __func__, prop, sDefaultBursts); prop = sDefaultBursts; } return prop; } int32_t getAAudioHardwareBurstMinUsecFromSystemProperty() { static const int32_t sDefaultMicros = 1000; // arbitrary static const int32_t sMaxMicros = 1000 * 1000; // arbitrary static const char* sPropHwBurstMinUsec = "aaudio.hw_burst_min_usec"; int32_t prop = property_get_int32(sPropHwBurstMinUsec, sDefaultMicros); if (prop <= 0 || prop > sMaxMicros) { ALOGE("%s invalid value %d, use default %d", __func__, prop, sDefaultMicros); prop = sDefaultMicros; } return prop; } } // namespace android