soundtrigger/2.3/types.hal

/*
 * Copyright 2019 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.
 */

package android.hardware.soundtrigger@2.3;

import android.hidl.safe_union@1.0::Monostate;
import @2.0::ISoundTriggerHw.Properties;
import @2.1::ISoundTriggerHw.RecognitionConfig;

/**
 * AudioCapabilities supported by the implemented HAL
 * driver.
 */
enum AudioCapabilities : uint32_t {
    /**
     * If set the underlying module supports AEC.
     */
    ECHO_CANCELLATION = 1 << 0,
    /**
     * If set, the underlying module supports noise suppression.
     */
    NOISE_SUPPRESSION = 1 << 1,
};

/**
 * Extended implementation properties providing verbose implementation
 * details.
 */
struct Properties {
    @2.0::ISoundTriggerHw.Properties base;

    /**
     * String naming the architecture used for running the supported models.
     * (eg. DSP architecture)
     */
    string supportedModelArch;

    /**
     * Bit field encoding of the AudioCapabilities
     * supported by the firmware.
     */
    bitfield<AudioCapabilities> audioCapabilities;
};

/**
 * Configuration for sound trigger capture session passed to
 * startRecognition_2_1() method.
 */
struct RecognitionConfig {
    @2.1::ISoundTriggerHw.RecognitionConfig base;

    /**
     * Bit field encoding of the AudioCapabilities
     * supported by the firmware.
     */
    bitfield<AudioCapabilities> audioCapabilities;
};

/**
 * Model specific parameters to be used with parameter set and get APIs
 */
enum ModelParameter : int32_t {
    /**
     * Placeholder for invalid model parameter used for returning error or
     * passing an invalid value.
     */
    INVALID = -1,

    /**
     * Controls the sensitivity threshold adjustment factor for a given model.
     * Negative value corresponds to less sensitive model (high threshold) and
     * a positive value corresponds to a more sensitive model (low threshold).
     * Default value is 0.
     */
    THRESHOLD_FACTOR = 0
};

/**
 * Safe union wrapping ModelParameterRange.
 * Monostate is used to indicate there is no valid range
 */
safe_union OptionalModelParameterRange {
    Monostate noinit;
    ModelParameterRange range;
};

/**
 * Model specific range support for a given parameter
 */
struct ModelParameterRange {
    /**
     * start of supported value range inclusive
     */
    int32_t start;
    /**
     * end of supported value range inclusive
     */
    int32_t end;
};