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Diffstat (limited to 'services/audiopolicy/common/managerdefinitions/src/ConfigParsingUtils.cpp')
-rw-r--r-- | services/audiopolicy/common/managerdefinitions/src/ConfigParsingUtils.cpp | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/services/audiopolicy/common/managerdefinitions/src/ConfigParsingUtils.cpp b/services/audiopolicy/common/managerdefinitions/src/ConfigParsingUtils.cpp new file mode 100644 index 0000000..fe5bc5f --- /dev/null +++ b/services/audiopolicy/common/managerdefinitions/src/ConfigParsingUtils.cpp @@ -0,0 +1,288 @@ +/* + * Copyright (C) 2015 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 "APM::ConfigParsingUtils" +//#define LOG_NDEBUG 0 + +#include "ConfigParsingUtils.h" +#include "AudioGain.h" +#include <hardware/audio.h> +#include <utils/Log.h> +#include <cutils/misc.h> + +namespace android { + +//static +uint32_t ConfigParsingUtils::stringToEnum(const struct StringToEnum *table, + size_t size, + const char *name) +{ + for (size_t i = 0; i < size; i++) { + if (strcmp(table[i].name, name) == 0) { + ALOGV("stringToEnum() found %s", table[i].name); + return table[i].value; + } + } + return 0; +} + +//static +const char *ConfigParsingUtils::enumToString(const struct StringToEnum *table, + size_t size, + uint32_t value) +{ + for (size_t i = 0; i < size; i++) { + if (table[i].value == value) { + return table[i].name; + } + } + return ""; +} + +//static +bool ConfigParsingUtils::stringToBool(const char *value) +{ + return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0)); +} + + +// --- audio_policy.conf file parsing +//static +uint32_t ConfigParsingUtils::parseOutputFlagNames(char *name) +{ + uint32_t flag = 0; + + // it is OK to cast name to non const here as we are not going to use it after + // strtok() modifies it + char *flagName = strtok(name, "|"); + while (flagName != NULL) { + if (strlen(flagName) != 0) { + flag |= ConfigParsingUtils::stringToEnum(sOutputFlagNameToEnumTable, + ARRAY_SIZE(sOutputFlagNameToEnumTable), + flagName); + } + flagName = strtok(NULL, "|"); + } + //force direct flag if offload flag is set: offloading implies a direct output stream + // and all common behaviors are driven by checking only the direct flag + // this should normally be set appropriately in the policy configuration file + if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) { + flag |= AUDIO_OUTPUT_FLAG_DIRECT; + } + + return flag; +} + +//static +uint32_t ConfigParsingUtils::parseInputFlagNames(char *name) +{ + uint32_t flag = 0; + + // it is OK to cast name to non const here as we are not going to use it after + // strtok() modifies it + char *flagName = strtok(name, "|"); + while (flagName != NULL) { + if (strlen(flagName) != 0) { + flag |= stringToEnum(sInputFlagNameToEnumTable, + ARRAY_SIZE(sInputFlagNameToEnumTable), + flagName); + } + flagName = strtok(NULL, "|"); + } + return flag; +} + +//static +audio_devices_t ConfigParsingUtils::parseDeviceNames(char *name) +{ + uint32_t device = 0; + + char *devName = strtok(name, "|"); + while (devName != NULL) { + if (strlen(devName) != 0) { + device |= stringToEnum(sDeviceNameToEnumTable, + ARRAY_SIZE(sDeviceNameToEnumTable), + devName); + } + devName = strtok(NULL, "|"); + } + return device; +} + +//static +void ConfigParsingUtils::loadHwModule(cnode *root, HwModuleCollection &hwModules, + DeviceVector &availableInputDevices, + DeviceVector &availableOutputDevices, + sp<DeviceDescriptor> &defaultOutputDevices, + bool &isSpeakerDrcEnable) +{ + status_t status = NAME_NOT_FOUND; + cnode *node; + sp<HwModule> module = new HwModule(root->name); + + node = config_find(root, DEVICES_TAG); + if (node != NULL) { + node = node->first_child; + while (node) { + ALOGV("loadHwModule() loading device %s", node->name); + status_t tmpStatus = module->loadDevice(node); + if (status == NAME_NOT_FOUND || status == NO_ERROR) { + status = tmpStatus; + } + node = node->next; + } + } + node = config_find(root, OUTPUTS_TAG); + if (node != NULL) { + node = node->first_child; + while (node) { + ALOGV("loadHwModule() loading output %s", node->name); + status_t tmpStatus = module->loadOutput(node); + if (status == NAME_NOT_FOUND || status == NO_ERROR) { + status = tmpStatus; + } + node = node->next; + } + } + node = config_find(root, INPUTS_TAG); + if (node != NULL) { + node = node->first_child; + while (node) { + ALOGV("loadHwModule() loading input %s", node->name); + status_t tmpStatus = module->loadInput(node); + if (status == NAME_NOT_FOUND || status == NO_ERROR) { + status = tmpStatus; + } + node = node->next; + } + } + loadGlobalConfig(root, module, availableInputDevices, availableOutputDevices, + defaultOutputDevices, isSpeakerDrcEnable); + + if (status == NO_ERROR) { + hwModules.add(module); + } +} + +//static +void ConfigParsingUtils::loadHwModules(cnode *root, HwModuleCollection &hwModules, + DeviceVector &availableInputDevices, + DeviceVector &availableOutputDevices, + sp<DeviceDescriptor> &defaultOutputDevices, + bool &isSpeakerDrcEnabled) +{ + cnode *node = config_find(root, AUDIO_HW_MODULE_TAG); + if (node == NULL) { + return; + } + + node = node->first_child; + while (node) { + ALOGV("loadHwModules() loading module %s", node->name); + loadHwModule(node, hwModules, availableInputDevices, availableOutputDevices, + defaultOutputDevices, isSpeakerDrcEnabled); + node = node->next; + } +} + +//static +void ConfigParsingUtils::loadGlobalConfig(cnode *root, const sp<HwModule>& module, + DeviceVector &availableInputDevices, + DeviceVector &availableOutputDevices, + sp<DeviceDescriptor> &defaultOutputDevice, + bool &speakerDrcEnabled) +{ + cnode *node = config_find(root, GLOBAL_CONFIG_TAG); + + if (node == NULL) { + return; + } + DeviceVector declaredDevices; + if (module != NULL) { + declaredDevices = module->mDeclaredDevices; + } + + node = node->first_child; + while (node) { + if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) { + availableOutputDevices.loadDevicesFromName((char *)node->value, + declaredDevices); + ALOGV("loadGlobalConfig() Attached Output Devices %08x", + availableOutputDevices.types()); + } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) { + audio_devices_t device = (audio_devices_t)stringToEnum( + sDeviceNameToEnumTable, + ARRAY_SIZE(sDeviceNameToEnumTable), + (char *)node->value); + if (device != AUDIO_DEVICE_NONE) { + defaultOutputDevice = new DeviceDescriptor(String8("default-output"), device); + } else { + ALOGW("loadGlobalConfig() default device not specified"); + } + ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", defaultOutputDevice->type()); + } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) { + availableInputDevices.loadDevicesFromName((char *)node->value, + declaredDevices); + ALOGV("loadGlobalConfig() Available InputDevices %08x", availableInputDevices.types()); + } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) { + speakerDrcEnabled = stringToBool((char *)node->value); + ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", speakerDrcEnabled); + } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) { + uint32_t major, minor; + sscanf((char *)node->value, "%u.%u", &major, &minor); + module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor); + ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u", + module->mHalVersion, major, minor); + } + node = node->next; + } +} + +//static +status_t ConfigParsingUtils::loadAudioPolicyConfig(const char *path, + HwModuleCollection &hwModules, + DeviceVector &availableInputDevices, + DeviceVector &availableOutputDevices, + sp<DeviceDescriptor> &defaultOutputDevices, + bool &isSpeakerDrcEnabled) +{ + cnode *root; + char *data; + + data = (char *)load_file(path, NULL); + if (data == NULL) { + return -ENODEV; + } + root = config_node("", ""); + config_load(root, data); + + loadHwModules(root, hwModules, + availableInputDevices, availableOutputDevices, + defaultOutputDevices, isSpeakerDrcEnabled); + // legacy audio_policy.conf files have one global_configuration section + loadGlobalConfig(root, hwModules.getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY), + availableInputDevices, availableOutputDevices, + defaultOutputDevices, isSpeakerDrcEnabled); + config_free(root); + free(root); + free(data); + + ALOGI("loadAudioPolicyConfig() loaded %s\n", path); + + return NO_ERROR; +} + +}; // namespace android |