Core Device Info Query Media Count

Query Media Count

Request the latest photo, video, and audio counts from a connected device, then read the updated mediaCountInfo property.

Prerequisites

Before querying media counts, ensure:

• The device is connected and in a stable state
• The device supports the DeviceInfoAPI protocol

API Reference

Framework

AIBuds.xcframework

Import

In the files where you want to use the SDK, import the main framework:

Swift

import AIBuds

Objective-C

#import <AIBuds/AIBuds.h>
#import <AIBuds/AIBuds-Swift.h>

Protocol

The request method and result property are defined in DeviceInfoAPI.

Swift

protocol DeviceInfoAPI: DeviceAPI {
    /// Media file count information, including counts for photos, videos,
    /// audio, etc.
    var mediaCountInfo: MediaCountInfoModel? { get }

    /// Request to query the device media count information.
    /// - Parameters:
    ///   - completion: A closure that is called when the operation completes.
    ///   - success: `true` if the operation was successful; otherwise `false`.
    ///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
    func requestQueryMediaCountInfo(
        _ completion: AIBudsCompletionHandler?
    )
}

Objective-C

@protocol AIBudsDeviceInfoAPI <AIBudsDeviceAPI>
    /// Media file count information, including counts for photos, videos,
    /// audio, etc.
    @property (nonatomic, readonly, strong) AIBudsMediaCountInfoModel * _Nullable mediaCountInfo;

    /// Request to query the device media count information.
    /// - Parameters:
    ///   - completion: A closure that is called when the operation completes.
    ///   - success: `true` if the operation was successful; otherwise `false`.
    ///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
    - (void)requestQueryMediaCountInfoWithCompletion:(AIBudsCompletionHandler _Nullable)completion;
@end

Instance Method

Requests the latest counts for media stored on the device.

Swift

/// Request to query the device media count information.
/// - Parameters:
///   - completion: A closure that is called when the operation completes.
///   - success: `true` if the operation was successful; otherwise `false`.
///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
func requestQueryMediaCountInfo(
    _ completion: AIBudsCompletionHandler?
)

Objective-C

/// Request to query the device media count information.
/// - Parameters:
///   - completion: A closure that is called when the operation completes.
///   - success: `true` if the operation was successful; otherwise `false`.
///   - error: An `NSError` object that describes the error that occurred, or `nil` if the operation was successful.
- (void)requestQueryMediaCountInfoWithCompletion:(AIBudsCompletionHandler _Nullable)completion;

Parameters

Parameter	Type	Description
completion	AIBudsCompletionHandler?	Optional completion handler called when the request finishes.

Callback Parameters:

Name	Type	Description
success	Bool / BOOL	true if the request succeeded; otherwise false.
error	NSError?	Error details if the request failed; otherwise nil.

Result Properties:

Property	Type	Description
photoCount	NSNumber	The number of photos.
videoCount	NSNumber	The number of videos.
audioCount	NSNumber	The number of audio files.

Return Value

The method does not return media counts in its completion handler. After a successful request, read the updated mediaCountInfo property.

Usage Examples

Swift

import AIBuds

final class DeviceManager {
    weak var device: DeviceConvertible?

    func queryMediaCount() {
        guard let device = device as? DeviceInfoAPI else {
            print("Device does not support media-count queries")
            return
        }

        device.requestQueryMediaCountInfo { success, error in
            guard success else {
                print("Media-count query failed: \(error?.localizedDescription ?? "Unknown error")")
                return
            }

            guard let counts = device.mediaCountInfo else {
                print("The device did not provide media-count information")
                return
            }

            print("Photos: \(counts.photoCount)")
            print("Videos: \(counts.videoCount)")
            print("Audio files: \(counts.audioCount)")
        }
    }
}

Objective-C

#import <AIBuds/AIBuds.h>
#import <AIBuds/AIBuds-Swift.h>

@interface DeviceManager ()
@property (weak, nonatomic) id<AIBudsDeviceConvertible> device;
@end

@implementation DeviceManager

- (void)queryMediaCount {
    id<AIBudsDeviceInfoAPI> device = (id<AIBudsDeviceInfoAPI>)self.device;
    if (![device conformsToProtocol:@protocol(AIBudsDeviceInfoAPI)]) {
        NSLog(@"Device does not support media-count queries");
        return;
    }

    [device requestQueryMediaCountInfoWithCompletion:^(
        BOOL success,
        NSError * _Nullable error
    ) {
        if (!success) {
            NSLog(@"Media-count query failed: %@",
                  error.localizedDescription ?: @"Unknown error");
            return;
        }

        AIBudsMediaCountInfoModel *counts = device.mediaCountInfo;
        if (!counts) {
            NSLog(@"The device did not provide media-count information");
            return;
        }

        NSLog(@"Photos: %@", counts.photoCount);
        NSLog(@"Videos: %@", counts.videoCount);
        NSLog(@"Audio files: %@", counts.audioCount);
    }];
}

@end

Error Handling

1. Check success before reading the refreshed property.
2. Use error for failure details when the request does not succeed.
3. Handle a nil mediaCountInfo value even after a successful callback.
4. Do not assume fixed error codes unless they are documented for the target device.

Best Practices

1. Read After Success: Access mediaCountInfo only after the query completes successfully.
2. Use the Published Fields: Read photo, video, and audio counts independently.
3. Check Protocol Conformance: Confirm that the device supports DeviceInfoAPI.
4. Update UI on the Main Queue: Dispatch completion-driven UIKit updates to the main queue.

Notes

• The completion handler reports request status; it does not contain a MediaCountInfoModel result.
• MediaCountInfoModel exposes photo, video, and audio counts as NSNumber values.
• The SDK does not expose a totalCount property in this model.
• Media counts can change while files are captured, imported, or deleted.