feat(ivs): support recording configuration for channel

packages/@aws-cdk/aws-ivs-alpha/README.md

@@ -115,3 +115,90 @@ const myChannel = new ivs.Channel(this, 'Channel', {
   authorized: true, // default value is false
 });
 ```
+
+## Recording Configurations
+
+An Amazon IVS Recording Configuration stores settings that specify how a channel's live streams should be recorded.
+You can configure video quality, thumbnail generation, and where recordings are stored in Amazon S3.
+
+For more information about IVS recording, see [IVS Auto-Record to Amazon S3 | Low-Latency Streaming](https://docs.aws.amazon.com/ivs/latest/LowLatencyUserGuide/record-to-s3.html).
+
+You can create a recording configuration:
+
+```ts
+// create an S3 bucket for storing recordings
+const recordingBucket = new s3.Bucket(this, 'RecordingBucket');
+
+// create a basic recording configuration
+const recordingConfiguration = new ivs.RecordingConfiguration(this, 'RecordingConfiguration', {
+  bucket: recordingBucket,
+});
+```
+
+### Renditions of a Recording
+
+When you stream content to an Amazon IVS channel, auto-record-to-s3 uses the source video to generate multiple renditions.
+
+For more information, see [Discovering the Renditions of a Recording](https://docs.aws.amazon.com/ivs/latest/LowLatencyUserGuide/record-to-s3.html#r2s3-recording-renditions).
+
+```ts
+declare const recordingBucket: s3.Bucket;
+
+const recordingConfiguration= new ivs.RecordingConfiguration(this, 'RecordingConfiguration', {
+  bucket: recordingBucket,
+
+  // set rendition configuration
+  renditionConfiguration: ivs.RenditionConfiguration.custom([ivs.Resolution.HD, ivs.Resolution.SD]),
+});
+```
+
+### Thumbnail Generation
+
+You can enable or disable the recording of thumbnails for a live session and modify the interval at which thumbnails are generated for the live session.
+
+Thumbnail intervals may range from 1 second to 60 seconds; by default, thumbnail recording is enabled, at an interval of 60 seconds.
+
+For more information, see [Thumbnails](https://docs.aws.amazon.com/ivs/latest/LowLatencyUserGuide/record-to-s3.html#r2s3-thumbnails).
+
+```ts
+declare const recordingBucket: s3.Bucket;
+
+const recordingConfiguration = new ivs.RecordingConfiguration(this, 'RecordingConfiguration', {
+  bucket: recordingBucket,
+
+  // set thumbnail settings
+  thumbnailConfiguration: ivs.ThumbnailConfiguration.interval(ivs.Resolution.HD, [ivs.Storage.LATEST, ivs.Storage.SEQUENTIAL], Duration.seconds(30)),
+});
+```
+
+### Merge Fragmented Streams
+
+The `recordingReconnectWindow` property allows you to specify a window of time (in seconds) during which, if your stream is interrupted and a new stream is started, Amazon IVS tries to record to the same S3 prefix as the previous stream.
+
+In other words, if a broadcast disconnects and then reconnects within the specified interval, the multiple streams are considered a single broadcast and merged together.
+
+For more information, see [Merge Fragmented Streams](https://docs.aws.amazon.com/ivs/latest/LowLatencyUserGuide/record-to-s3.html#r2s3-merge-fragmented-streams).
+
+```ts
+declare const recordingBucket: s3.Bucket;
+
+const recordingConfiguration= new ivs.RecordingConfiguration(this, 'RecordingConfiguration', {
+  bucket: recordingBucket,
+
+  // set recording reconnect window
+  recordingReconnectWindow: Duration.seconds(60),
+});
+```
+
+### Attaching Recording Configuration to a Channel
+
+To enable recording for a channel, specify the recording configuration when creating the channel:
+
+```ts
+declare const recordingConfiguration: ivs.RecordingConfiguration;
+
+const channel = new ivs.Channel(this, 'Channel', {
+  // set recording configuration
+  recordingConfiguration: recordingConfiguration,
+});
+```

packages/@aws-cdk/aws-ivs-alpha/lib/channel.ts

@@ -3,6 +3,7 @@ import { Lazy, Names } from 'aws-cdk-lib/core';
 import { Construct } from 'constructs';
 import { CfnChannel } from 'aws-cdk-lib/aws-ivs';
 import { StreamKey } from './stream-key';
+import { IRecordingConfiguration } from './recording-configuration';
 
 /**
  * Represents an IVS Channel
@@ -153,6 +154,13 @@ export interface ChannelProps {
    * @default - Preset.HIGHER_BANDWIDTH_DELIVERY if channelType is ADVANCED_SD or ADVANCED_HD, none otherwise
    */
   readonly preset?: Preset;
+
+  /**
+   * A recording configuration for the channel.
+   *
+   * @default - recording is disabled
+   */
+  readonly recordingConfiguration?: IRecordingConfiguration;
 }
 
 /**
@@ -223,6 +231,7 @@ export class Channel extends ChannelBase {
       name: this.physicalName,
       type: props.type,
       preset,
+      recordingConfigurationArn: props.recordingConfiguration?.recordingConfigurationArn,
     });
 
     this.channelArn = resource.attrArn;

packages/@aws-cdk/aws-ivs-alpha/lib/index.ts

@@ -1,5 +1,9 @@
 export * from './channel';
 export * from './playback-key-pair';
+export * from './recording-configuration';
+export * from './rendition-configuration';
 export * from './stream-key';
+export * from './thumbnail-configuration';
+export * from './util';
 
 // AWS::IVS CloudFormation Resources:

packages/@aws-cdk/aws-ivs-alpha/lib/recording-configuration.ts

@@ -0,0 +1,210 @@
+import { CfnRecordingConfiguration } from 'aws-cdk-lib/aws-ivs';
+import { IBucket } from 'aws-cdk-lib/aws-s3';
+import { Duration, Fn, IResource, Resource, Stack, Token } from 'aws-cdk-lib/core';
+import { Construct } from 'constructs';
+import { RenditionConfiguration } from './rendition-configuration';
+import { ThumbnailConfiguration } from './thumbnail-configuration';
+
+/**
+ * Properties of the IVS Recording configuration
+ */
+export interface RecordingConfigurationProps {
+  /**
+   * S3 bucket where recorded videos will be stored.
+   */
+  readonly bucket: IBucket;
+
+  /**
+   * The name of the Recording configuration.
+   * The value does not need to be unique.
+   *
+   * @default - auto generate
+   */
+  readonly recordingConfigurationName?: string;
+
+  /**
+   * If a broadcast disconnects and then reconnects within the specified interval,
+   * the multiple streams will be considered a single broadcast and merged together.
+   *
+   * `recordingReconnectWindow` must be between 0 and 300 seconds
+   *
+   * @default - 0 seconds (means disabled)
+   */
+  readonly recordingReconnectWindow?: Duration;
+
+  /**
+   * A rendition configuration describes which renditions should be recorded for a stream.
+   *
+   * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ivs-recordingconfiguration-renditionconfiguration.html
+   *
+   * @default - no rendition configuration
+   */
+  readonly renditionConfiguration?: RenditionConfiguration;
+
+  /**
+   * A thumbnail configuration enables/disables the recording of thumbnails for a live session and controls the interval at which thumbnails are generated for the live session.
+   *
+   * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ivs-recordingconfiguration-thumbnailconfiguration.html
+   *
+   * @default - no thumbnail configuration
+   */
+  readonly thumbnailConfiguration?:ThumbnailConfiguration;
+}
+
+/**
+ * Represents the IVS Recording configuration.
+ */
+export interface IRecordingConfiguration extends IResource {
+  /**
+   * The ID of the Recording configuration.
+   * @attribute
+   */
+  readonly recordingConfigurationId: string;
+
+  /**
+   * The ARN of the Recording configuration.
+   * @attribute
+   */
+  readonly recordingConfigurationArn: string;
+}
+
+/**
+ * The IVS Recording configuration
+ *
+ * @resource AWS::IVS::RecordingConfiguration
+ */
+export class RecordingConfiguration extends Resource implements IRecordingConfiguration {
+  /**
+   * Imports an IVS Recording Configuration from attributes.
+   */
+  public static fromRecordingConfigurationId(scope: Construct, id: string,
+    recordingConfigurationId: string): IRecordingConfiguration {
+
+    class Import extends Resource implements IRecordingConfiguration {
+      public readonly recordingConfigurationId = recordingConfigurationId;
+      public readonly recordingConfigurationArn = Stack.of(this).formatArn({
+        resource: 'recording-configuration',
+        service: 'ivs',
+        resourceName: recordingConfigurationId,
+      });
+    }
+
+    return new Import(scope, id);
+  }
+
+  /**
+   * Imports an IVS Recording Configuration from its ARN
+   */
+  public static fromArn(scope: Construct, id: string, recordingConfigurationArn: string): IRecordingConfiguration {
+    const resourceParts = Fn.split('/', recordingConfigurationArn);
+
+    if (!resourceParts || resourceParts.length < 2) {
+      throw new Error(`Unexpected ARN format: ${recordingConfigurationArn}`);
+    }
+
+    const recordingConfigurationId = Fn.select(1, resourceParts);
+
+    class Import extends Resource implements IRecordingConfiguration {
+      public readonly recordingConfigurationId = recordingConfigurationId;
+      public readonly recordingConfigurationArn = recordingConfigurationArn;
+    }
+
+    return new Import(scope, id);
+  }
+
+  /**
+   * The ID of the Recording configuration.
+   * @attribute
+   */
+  readonly recordingConfigurationId: string;
+
+  /**
+   * The ARN of the Recording configuration.
+   * @attribute
+   */
+  readonly recordingConfigurationArn: string;
+
+  private readonly props: RecordingConfigurationProps;
+
+  public constructor(scope: Construct, id: string, props: RecordingConfigurationProps) {
+    super(scope, id, {
+      physicalName: props.recordingConfigurationName,
+    });
+
+    this.props = props;
+
+    this.validateRecordingConfigurationName();
+    this.validateRecordingReconnectWindowSeconds();
+
+    const resource = new CfnRecordingConfiguration(this, 'Resource', {
+      destinationConfiguration: {
+        s3: {
+          bucketName: this.props.bucket.bucketName,
+        },
+      },
+      name: this.props.recordingConfigurationName,
+      recordingReconnectWindowSeconds: this.props.recordingReconnectWindow?.toSeconds(),
+      renditionConfiguration: this._renderRenditionConfiguration(),
+      thumbnailConfiguration: this._renderThumbnailConfiguration(),
+    });
+
+    this.recordingConfigurationId = resource.ref;
+    this.recordingConfigurationArn = resource.attrArn;
+  }
+
+  private _renderRenditionConfiguration(): CfnRecordingConfiguration.RenditionConfigurationProperty | undefined {
+    if (!this.props.renditionConfiguration) {
+      return;
+    }
+
+    return {
+      renditions: this.props.renditionConfiguration.renditions,
+      renditionSelection: this.props.renditionConfiguration.renditionSelection,
+    };
+  };
+
+  private _renderThumbnailConfiguration(): CfnRecordingConfiguration.ThumbnailConfigurationProperty | undefined {
+    if (!this.props.thumbnailConfiguration) {
+      return;
+    }
+
+    return {
+      recordingMode: this.props.thumbnailConfiguration.recordingMode,
+      resolution: this.props.thumbnailConfiguration.resolution,
+      storage: this.props.thumbnailConfiguration.storage,
+      targetIntervalSeconds: this.props.thumbnailConfiguration.targetInterval?.toSeconds(),
+    };
+  };
+
+  private validateRecordingConfigurationName(): undefined {
+    const recordingConfigurationName = this.props.recordingConfigurationName;
+
+    if (recordingConfigurationName == undefined || Token.isUnresolved(recordingConfigurationName)) {
+      return;
+    }
+
+    if (!/^[a-zA-Z0-9-_]*$/.test(recordingConfigurationName)) {
+      throw new Error(`\`recordingConfigurationName\` must consist only of alphanumeric characters, hyphens or underbars, got: ${recordingConfigurationName}.`);
+    }
+
+    if (recordingConfigurationName.length > 128) {
+      throw new Error(`\`recordingConfigurationName\` must be less than or equal to 128 characters, got: ${recordingConfigurationName.length} characters.`);
+    }
+  };
+
+  private validateRecordingReconnectWindowSeconds(): undefined {
+    const recordingReconnectWindow = this.props.recordingReconnectWindow;
+
+    if (recordingReconnectWindow === undefined || Token.isUnresolved(recordingReconnectWindow)) {
+      return;
+    }
+
+    if (0 < recordingReconnectWindow.toMilliseconds() && recordingReconnectWindow.toMilliseconds() < Duration.seconds(1).toMilliseconds()) {
+      throw new Error(`\`recordingReconnectWindow\` must be between 0 and 300 seconds, got ${recordingReconnectWindow.toMilliseconds()} milliseconds.`);
+    }
+
+    if (recordingReconnectWindow.toSeconds() > 300) {
+      throw new Error(`\`recordingReconnectWindow\` must be between 0 and 300 seconds, got ${recordingReconnectWindow.toSeconds()} seconds.`);
+    }
+  };
+}

packages/@aws-cdk/aws-ivs-alpha/lib/rendition-configuration.ts

@@ -0,0 +1,55 @@
+import { Resolution } from './util';
+
+/**
+ * Rendition selection mode.
+ */
+export enum RenditionSelection {
+  /**
+   * Record all available renditions.
+   */
+  ALL = 'ALL',
+
+  /**
+   * Does not record any video. This option is useful if you just want to record thumbnails.
+   */
+  NONE = 'NONE',
+
+  /**
+   * Select a subset of video renditions to record.
+   */
+  CUSTOM = 'CUSTOM',
+}
+
+/**
+ * Rendition configuration for IVS Recording configuration
+ */
+export class RenditionConfiguration {
+  /**
+   * Record all available renditions.
+   */
+  public static all(): RenditionConfiguration {
+    return new RenditionConfiguration(RenditionSelection.ALL);
+  }
+
+  /**
+   * Does not record any video.
+   */
+  public static none(): RenditionConfiguration {
+    return new RenditionConfiguration(RenditionSelection.NONE);
+  }
+
+  /**
+   * Record a subset of video renditions.
+   *
+   * @param renditions A list of which renditions are recorded for a stream.
+   */
+  public static custom(renditions: Resolution[]): RenditionConfiguration {
+    return new RenditionConfiguration(RenditionSelection.CUSTOM, renditions);
+  }
+
+  /**
+   * @param renditionSelection The set of renditions are recorded for a stream.
+   * @param renditions A list of which renditions are recorded for a stream. If you do not specify this property, no resolution is selected.
+   */
+  private constructor(public readonly renditionSelection: RenditionSelection, public readonly renditions?: Resolution[]) { }
+}