camera/ndk/impl/ACameraMetadata.cpp

/*
 * 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_NDEBUG 0
#define LOG_TAG "ACameraMetadata"

#include "ACameraMetadata.h"
#include <utils/Vector.h>

using namespace android;

/**
 * ACameraMetadata Implementation
 */
ACameraMetadata::ACameraMetadata(camera_metadata_t* buffer, ACAMERA_METADATA_TYPE type) :
        mData(buffer), mType(type) {
    if (mType == ACM_CHARACTERISTICS) {
        filterUnsupportedFeatures();
    }
    // TODO: filter request/result keys
}

bool
ACameraMetadata::isNdkSupportedCapability(int32_t capability) {
    switch (capability) {
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_RAW:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT:
            return true;
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_YUV_REPROCESSING:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_PRIVATE_REPROCESSING:
        case ANDROID_REQUEST_AVAILABLE_CAPABILITIES_CONSTRAINED_HIGH_SPEED_VIDEO:
            return false;
        default:
            // Newly defined capabilities will be unsupported by default (blacklist)
            // TODO: Should we do whitelist or blacklist here?
            ALOGE("%s: Unknonwn capability %d", __FUNCTION__, capability);
            return false;
    }
}

void
ACameraMetadata::filterUnsupportedFeatures() {
    // Hide unsupported capabilities (reprocessing)
    camera_metadata_entry entry = mData.find(ANDROID_REQUEST_AVAILABLE_CAPABILITIES);
    if (entry.count == 0 || entry.type != ACAMERA_TYPE_BYTE) {
        ALOGE("%s: malformed available capability key! count %zu, type %d",
                __FUNCTION__, entry.count, entry.type);
        return;
    }

    Vector<uint8_t> capabilities;
    capabilities.setCapacity(entry.count);
    for (size_t i = 0; i < entry.count; i++) {
        uint8_t capability = entry.data.u8[i];
        if (isNdkSupportedCapability(capability)) {
            capabilities.push(capability);
        }
    }
    mData.update(ANDROID_REQUEST_AVAILABLE_CAPABILITIES, capabilities);
    // TODO: Hide unsupported streams (input/bidirectional streams)
}

bool
ACameraMetadata::isVendorTag(const uint32_t tag) {
    uint32_t tag_section = tag >> 16;
    if (tag_section >= VENDOR_SECTION) {
        return true;
    }
    return false;
}

camera_status_t
ACameraMetadata::getConstEntry(uint32_t tag, ACameraMetadata_const_entry* entry) const {
    if (entry == nullptr) {
        return ACAMERA_ERROR_INVALID_PARAMETER;
    }

    camera_metadata_ro_entry rawEntry = mData.find(tag);
    if (rawEntry.count == 0) {
        ALOGE("%s: cannot find metadata tag %d", __FUNCTION__, tag);
        return ACAMERA_ERROR_METADATA_NOT_FOUND;
    }
    entry->tag = tag;
    entry->type = rawEntry.type;
    entry->count = rawEntry.count;
    entry->data.u8 = rawEntry.data.u8;
    return ACAMERA_OK;
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const uint8_t* data) {
    return updateImpl<uint8_t>(tag, count, data);
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const int32_t* data) {
    return updateImpl<int32_t>(tag, count, data);
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const float* data) {
    return updateImpl<float>(tag, count, data);
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const double* data) {
    return updateImpl<double>(tag, count, data);
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const int64_t* data) {
    return updateImpl<int64_t>(tag, count, data);
}

camera_status_t
ACameraMetadata::update(uint32_t tag, uint32_t count, const ACameraMetadata_rational* data) {
    return updateImpl<camera_metadata_rational_t>(tag, count, data);
}


// TODO: some of key below should be hidden from user
// ex: ACAMERA_REQUEST_ID and ACAMERA_REPROCESS_EFFECTIVE_EXPOSURE_FACTOR
/*@O~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
 * The key entries below this point are generated from metadata
 * definitions in /system/media/camera/docs. Do not modify by hand or
 * modify the comment blocks at the start or end.
 *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~*/

bool
ACameraMetadata::isCaptureRequestTag(const uint32_t tag) {
    // Skip check for vendor keys
    if (isVendorTag(tag)) {
        return true;
    }

    switch (tag) {
        case ACAMERA_COLOR_CORRECTION_MODE:
        case ACAMERA_COLOR_CORRECTION_TRANSFORM:
        case ACAMERA_COLOR_CORRECTION_GAINS:
        case ACAMERA_COLOR_CORRECTION_ABERRATION_MODE:
        case ACAMERA_CONTROL_AE_ANTIBANDING_MODE:
        case ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION:
        case ACAMERA_CONTROL_AE_LOCK:
        case ACAMERA_CONTROL_AE_MODE:
        case ACAMERA_CONTROL_AE_REGIONS:
        case ACAMERA_CONTROL_AE_TARGET_FPS_RANGE:
        case ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER:
        case ACAMERA_CONTROL_AF_MODE:
        case ACAMERA_CONTROL_AF_REGIONS:
        case ACAMERA_CONTROL_AF_TRIGGER:
        case ACAMERA_CONTROL_AWB_LOCK:
        case ACAMERA_CONTROL_AWB_MODE:
        case ACAMERA_CONTROL_AWB_REGIONS:
        case ACAMERA_CONTROL_CAPTURE_INTENT:
        case ACAMERA_CONTROL_EFFECT_MODE:
        case ACAMERA_CONTROL_MODE:
        case ACAMERA_CONTROL_SCENE_MODE:
        case ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE:
        case ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST:
        case ACAMERA_EDGE_MODE:
        case ACAMERA_FLASH_MODE:
        case ACAMERA_HOT_PIXEL_MODE:
        case ACAMERA_JPEG_GPS_COORDINATES:
        case ACAMERA_JPEG_GPS_PROCESSING_METHOD:
        case ACAMERA_JPEG_GPS_TIMESTAMP:
        case ACAMERA_JPEG_ORIENTATION:
        case ACAMERA_JPEG_QUALITY:
        case ACAMERA_JPEG_THUMBNAIL_QUALITY:
        case ACAMERA_JPEG_THUMBNAIL_SIZE:
        case ACAMERA_LENS_APERTURE:
        case ACAMERA_LENS_FILTER_DENSITY:
        case ACAMERA_LENS_FOCAL_LENGTH:
        case ACAMERA_LENS_FOCUS_DISTANCE:
        case ACAMERA_LENS_OPTICAL_STABILIZATION_MODE:
        case ACAMERA_NOISE_REDUCTION_MODE:
        case ACAMERA_REQUEST_ID:
        case ACAMERA_SCALER_CROP_REGION:
        case ACAMERA_SENSOR_EXPOSURE_TIME:
        case ACAMERA_SENSOR_FRAME_DURATION:
        case ACAMERA_SENSOR_SENSITIVITY:
        case ACAMERA_SENSOR_TEST_PATTERN_DATA:
        case ACAMERA_SENSOR_TEST_PATTERN_MODE:
        case ACAMERA_SHADING_MODE:
        case ACAMERA_STATISTICS_FACE_DETECT_MODE:
        case ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE:
        case ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE:
        case ACAMERA_TONEMAP_CURVE_BLUE:
        case ACAMERA_TONEMAP_CURVE_GREEN:
        case ACAMERA_TONEMAP_CURVE_RED:
        case ACAMERA_TONEMAP_MODE:
        case ACAMERA_TONEMAP_GAMMA:
        case ACAMERA_TONEMAP_PRESET_CURVE:
        case ACAMERA_LED_TRANSMIT:
        case ACAMERA_BLACK_LEVEL_LOCK:
        case ACAMERA_REPROCESS_EFFECTIVE_EXPOSURE_FACTOR:
            return true;
        default:
            return false;
    }
}

/*~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
 * End generated code
 *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~O@*/