/* * Copyright (C) 2014 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. */ #ifndef ANDROID_SOUND_TRIGGER_H #define ANDROID_SOUND_TRIGGER_H #include #include #define SOUND_TRIGGER_MAX_STRING_LEN 64 /* max length of strings in properties or descriptor structs */ #define SOUND_TRIGGER_MAX_LOCALE_LEN 6 /* max length of locale string. e.g en_US */ #define SOUND_TRIGGER_MAX_USERS 10 /* max number of concurrent users */ #define SOUND_TRIGGER_MAX_PHRASES 10 /* max number of concurrent phrases */ #define RECOGNITION_MODE_VOICE_TRIGGER 0x1 /* simple voice trigger */ #define RECOGNITION_MODE_USER_IDENTIFICATION 0x2 /* trigger only if one user in model identified */ #define RECOGNITION_MODE_USER_AUTHENTICATION 0x4 /* trigger only if one user in mode authenticated */ #define RECOGNITION_STATUS_SUCCESS 0 #define RECOGNITION_STATUS_ABORT 1 #define RECOGNITION_STATUS_FAILURE 2 #define SOUND_MODEL_STATUS_UPDATED 0 typedef enum { SOUND_MODEL_TYPE_UNKNOWN = -1, /* use for unspecified sound model type */ SOUND_MODEL_TYPE_KEYPHRASE = 0 /* use for key phrase sound models */ } sound_trigger_sound_model_type_t; typedef struct sound_trigger_uuid_s { unsigned int timeLow; unsigned short timeMid; unsigned short timeHiAndVersion; unsigned short clockSeq; unsigned char node[6]; } sound_trigger_uuid_t; /* * sound trigger implementation descriptor read by the framework via get_properties(). * Used by SoundTrigger service to report to applications and manage concurrency and policy. */ struct sound_trigger_properties { char implementor[SOUND_TRIGGER_MAX_STRING_LEN]; /* implementor name */ char description[SOUND_TRIGGER_MAX_STRING_LEN]; /* implementation description */ unsigned int version; /* implementation version */ sound_trigger_uuid_t uuid; /* unique implementation ID. Must change with version each version */ unsigned int max_sound_models; /* maximum number of concurrent sound models loaded */ unsigned int max_key_phrases; /* maximum number of key phrases */ unsigned int max_users; /* maximum number of concurrent users detected */ unsigned int recognition_modes; /* all supported modes. e.g RECOGNITION_MODE_VOICE_TRIGGER */ bool capture_transition; /* supports seamless transition from detection to capture */ unsigned int max_buffer_ms; /* maximum buffering capacity in ms if capture_transition is true*/ bool concurrent_capture; /* supports capture by other use cases while detection is active */ unsigned int power_consumption_mw; /* Rated power consumption when detection is active with TDB silence/sound/speech ratio */ }; typedef int sound_trigger_module_handle_t; struct sound_trigger_module_descriptor { sound_trigger_module_handle_t handle; struct sound_trigger_properties properties; }; typedef int sound_model_handle_t; /* * Generic sound model descriptor. This struct is the header of a larger block passed to * load_sound_model() and containing the binary data of the sound model. * Proprietary representation of users in binary data must match information indicated * by users field */ struct sound_trigger_sound_model { sound_trigger_sound_model_type_t type; /* model type. e.g. SOUND_MODEL_TYPE_KEYPHRASE */ sound_trigger_uuid_t uuid; /* unique sound model ID. */ sound_trigger_uuid_t vendor_uuid; /* unique vendor ID. Identifies the engine the sound model was build for */ unsigned int data_size; /* size of opaque model data */ unsigned int data_offset; /* offset of opaque data start from head of struct (e.g sizeof struct sound_trigger_sound_model) */ }; /* key phrase descriptor */ struct sound_trigger_phrase { unsigned int id; /* keyphrase ID */ unsigned int recognition_mode; /* recognition modes supported by this key phrase */ unsigned int num_users; /* number of users in the key phrase */ unsigned int users[SOUND_TRIGGER_MAX_USERS]; /* users ids: (not uid_t but sound trigger specific IDs */ char locale[SOUND_TRIGGER_MAX_LOCALE_LEN]; /* locale - JAVA Locale style (e.g. en_US) */ char text[SOUND_TRIGGER_MAX_STRING_LEN]; /* phrase text in UTF-8 format. */ }; /* * Specialized sound model for key phrase detection. * Proprietary representation of key phrases in binary data must match information indicated * by phrases field */ struct sound_trigger_phrase_sound_model { struct sound_trigger_sound_model common; unsigned int num_phrases; /* number of key phrases in model */ struct sound_trigger_phrase phrases[SOUND_TRIGGER_MAX_PHRASES]; }; /* * Generic recognition event sent via recognition callback */ struct sound_trigger_recognition_event { int status; /* recognition status e.g. RECOGNITION_STATUS_SUCCESS */ sound_trigger_sound_model_type_t type; /* event type, same as sound model type. e.g. SOUND_MODEL_TYPE_KEYPHRASE */ sound_model_handle_t model; /* loaded sound model that triggered the event */ bool capture_available; /* it is possible to capture audio from this utterance buffered by the implementation */ int capture_session; /* audio session ID. framework use */ int capture_delay_ms; /* delay in ms between end of model detection and start of audio available for capture. A negative value is possible (e.g. if key phrase is also available for capture */ int capture_preamble_ms; /* duration in ms of audio captured before the start of the trigger. 0 if none. */ unsigned int data_size; /* size of opaque event data */ unsigned int data_offset; /* offset of opaque data start from start of this struct (e.g sizeof struct sound_trigger_phrase_recognition_event) */ }; /* * Confidence level for each user in struct sound_trigger_phrase_recognition_extra */ struct sound_trigger_confidence_level { unsigned int user_id; /* user ID */ unsigned int level; /* confidence level in percent (0 - 100). - min level for recognition configuration - detected level for recognition event */ }; /* * Specialized recognition event for key phrase detection */ struct sound_trigger_phrase_recognition_extra { unsigned int id; /* keyphrase ID */ unsigned int recognition_modes; /* recognition modes used for this keyphrase */ unsigned int num_levels; /* number of user confidence levels */ struct sound_trigger_confidence_level levels[SOUND_TRIGGER_MAX_USERS]; }; struct sound_trigger_phrase_recognition_event { struct sound_trigger_recognition_event common; bool key_phrase_in_capture; /* true if the key phrase is present in audio data available for capture after recognition event is fired */ unsigned int num_phrases; struct sound_trigger_phrase_recognition_extra phrase_extras[SOUND_TRIGGER_MAX_PHRASES]; }; /* * configuration for sound trigger capture session passed to start_recognition() */ struct sound_trigger_recognition_config { audio_io_handle_t capture_handle; /* IO handle that will be used for capture. N/A if capture_requested is false */ audio_devices_t capture_device; /* input device requested for detection capture */ bool capture_requested; /* capture and buffer audio for this recognition instance */ unsigned int num_phrases; /* number of key phrases recognition extras */ struct sound_trigger_phrase_recognition_extra phrases[SOUND_TRIGGER_MAX_PHRASES]; /* configuration for each key phrase */ unsigned int data_size; /* size of opaque capture configuration data */ unsigned int data_offset; /* offset of opaque data start from start of this struct (e.g sizeof struct sound_trigger_recognition_config) */ }; /* * Event sent via load sound model callback */ struct sound_trigger_model_event { int status; /* sound model status e.g. SOUND_MODEL_STATUS_UPDATED */ unsigned int data_size; /* size of event data if any. Size of updated sound model if status is SOUND_MODEL_STATUS_UPDATED */ unsigned int data_offset; /* offset of data start from start of this struct (e.g sizeof struct sound_trigger_model_event) */ }; #endif // ANDROID_SOUND_TRIGGER_H