需要录制音频
    ↓
需要直接生成音频文件（如m4a）？
    ├── 是 → 使用 AVRecorder（开箱即用）
    └── 否 → 需要PCM原始数据
            ├── ArkTS/JS开发 → 使用 AudioCapturer
            └── Native C/C++开发 → 使用 OHAudio

// AVRecorder使用示例
import { media } from '@kit.MediaKit';

let avRecorder = await media.createAVRecorder();
await avRecorder.prepare({
    audioSourceType: media.AudioSourceType.AUDIO_SOURCE_TYPE_MIC,
    profile: {
        audioBitrate: 48000,
        audioCodec: media.CodecMimeType.AUDIO_AAC,
        audioSampleRate: 44100,
        audioChannels: 2
    },
    url: 'file:///data/storage/el2/base/haps/entry/files/recording.m4a'
});
await avRecorder.start();

// AudioCapturer使用示例
import { audio } from '@kit.AudioKit';

let audioCapturer = await audio.createAudioCapturer({
    streamInfo: {
        samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
        channels: audio.AudioChannel.CHANNEL_2,
        sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
        encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
    }
});

await audioCapturer.start();
// 持续读取PCM数据
let buffer = await audioCapturer.read(size);

// 申请麦克风权限
import { abilityAccessCtrl } from '@kit.AbilityKit';

let atManager = abilityAccessCtrl.createAtManager();
await atManager.requestPermissionsFromUser(context, ['ohos.permission.MICROPHONE']);

// 申请长时任务示例
import { backgroundTaskManager } from '@kit.BackgroundTasksKit';

await backgroundTaskManager.startBackgroundRunning(this.context,
    backgroundTaskManager.BackgroundMode.AUDIO_RECORDING, wantAgent);