api_op_GetSegmentDetection.go

// Code generated by smithy-go-codegen DO NOT EDIT.

package rekognition

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/service/rekognition/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Gets the segment detection results of a Amazon Rekognition Video analysis
// started by StartSegmentDetection. Segment detection with Amazon Rekognition
// Video is an asynchronous operation. You start segment detection by calling
// StartSegmentDetection which returns a job identifier (JobId). When the segment
// detection operation finishes, Amazon Rekognition publishes a completion status
// to the Amazon Simple Notification Service topic registered in the initial call
// to StartSegmentDetection. To get the results of the segment detection operation,
// first check that the status value published to the Amazon SNS topic is
// SUCCEEDED. if so, call GetSegmentDetection and pass the job identifier (JobId)
// from the initial call of StartSegmentDetection. GetSegmentDetection returns
// detected segments in an array (Segments) of SegmentDetection objects. Segments
// is sorted by the segment types specified in the SegmentTypes input parameter of
// StartSegmentDetection. Each element of the array includes the detected segment,
// the precentage confidence in the acuracy of the detected segment, the type of
// the segment, and the frame in which the segment was detected. Use
// SelectedSegmentTypes to find out the type of segment detection requested in the
// call to StartSegmentDetection. Use the MaxResults parameter to limit the number
// of segment detections returned. If there are more results than specified in
// MaxResults, the value of NextToken in the operation response contains a
// pagination token for getting the next set of results. To get the next page of
// results, call GetSegmentDetection and populate the NextToken request parameter
// with the token value returned from the previous call to GetSegmentDetection. For
// more information, see Detecting Video Segments in Stored Video in the Amazon
// Rekognition Developer Guide.
func (c *Client) GetSegmentDetection(ctx context.Context, params *GetSegmentDetectionInput, optFns ...func(*Options)) (*GetSegmentDetectionOutput, error) {
	if params == nil {
		params = &GetSegmentDetectionInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "GetSegmentDetection", params, optFns, addOperationGetSegmentDetectionMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*GetSegmentDetectionOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type GetSegmentDetectionInput struct {

	// Job identifier for the text detection operation for which you want results
	// returned. You get the job identifer from an initial call to
	// StartSegmentDetection.
	//
	// This member is required.
	JobId *string

	// Maximum number of results to return per paginated call. The largest value you
	// can specify is 1000.
	MaxResults *int32

	// If the response is truncated, Amazon Rekognition Video returns this token that
	// you can use in the subsequent request to retrieve the next set of text.
	NextToken *string
}

type GetSegmentDetectionOutput struct {

	// An array of objects. There can be multiple audio streams. Each AudioMetadata
	// object contains metadata for a single audio stream. Audio information in an
	// AudioMetadata objects includes the audio codec, the number of audio channels,
	// the duration of the audio stream, and the sample rate. Audio metadata is
	// returned in each page of information returned by GetSegmentDetection.
	AudioMetadata []types.AudioMetadata

	// Current status of the segment detection job.
	JobStatus types.VideoJobStatus

	// If the previous response was incomplete (because there are more labels to
	// retrieve), Amazon Rekognition Video returns a pagination token in the response.
	// You can use this pagination token to retrieve the next set of text.
	NextToken *string

	// An array of segments detected in a video. The array is sorted by the segment
	// types (TECHNICAL_CUE or SHOT) specified in the SegmentTypes input parameter of
	// StartSegmentDetection. Within each segment type the array is sorted by timestamp
	// values.
	Segments []types.SegmentDetection

	// An array containing the segment types requested in the call to
	// StartSegmentDetection.
	SelectedSegmentTypes []types.SegmentTypeInfo

	// If the job fails, StatusMessage provides a descriptive error message.
	StatusMessage *string

	// Currently, Amazon Rekognition Video returns a single object in the VideoMetadata
	// array. The object contains information about the video stream in the input file
	// that Amazon Rekognition Video chose to analyze. The VideoMetadata object
	// includes the video codec, video format and other information. Video metadata is
	// returned in each page of information returned by GetSegmentDetection.
	VideoMetadata []types.VideoMetadata

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata
}

func addOperationGetSegmentDetectionMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpGetSegmentDetection{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpGetSegmentDetection{}, middleware.After)
	if err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addOpGetSegmentDetectionValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetSegmentDetection(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	return nil
}

// GetSegmentDetectionAPIClient is a client that implements the GetSegmentDetection
// operation.
type GetSegmentDetectionAPIClient interface {
	GetSegmentDetection(context.Context, *GetSegmentDetectionInput, ...func(*Options)) (*GetSegmentDetectionOutput, error)
}

var _ GetSegmentDetectionAPIClient = (*Client)(nil)

// GetSegmentDetectionPaginatorOptions is the paginator options for
// GetSegmentDetection
type GetSegmentDetectionPaginatorOptions struct {
	// Maximum number of results to return per paginated call. The largest value you
	// can specify is 1000.
	Limit int32

	// Set to true if pagination should stop if the service returns a pagination token
	// that matches the most recent token provided to the service.
	StopOnDuplicateToken bool
}

// GetSegmentDetectionPaginator is a paginator for GetSegmentDetection
type GetSegmentDetectionPaginator struct {
	options   GetSegmentDetectionPaginatorOptions
	client    GetSegmentDetectionAPIClient
	params    *GetSegmentDetectionInput
	nextToken *string
	firstPage bool
}

// NewGetSegmentDetectionPaginator returns a new GetSegmentDetectionPaginator
func NewGetSegmentDetectionPaginator(client GetSegmentDetectionAPIClient, params *GetSegmentDetectionInput, optFns ...func(*GetSegmentDetectionPaginatorOptions)) *GetSegmentDetectionPaginator {
	if params == nil {
		params = &GetSegmentDetectionInput{}
	}

	options := GetSegmentDetectionPaginatorOptions{}
	if params.MaxResults != nil {
		options.Limit = *params.MaxResults
	}

	for _, fn := range optFns {
		fn(&options)
	}

	return &GetSegmentDetectionPaginator{
		options:   options,
		client:    client,
		params:    params,
		firstPage: true,
	}
}

// HasMorePages returns a boolean indicating whether more pages are available
func (p *GetSegmentDetectionPaginator) HasMorePages() bool {
	return p.firstPage || p.nextToken != nil
}

// NextPage retrieves the next GetSegmentDetection page.
func (p *GetSegmentDetectionPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*GetSegmentDetectionOutput, error) {
	if !p.HasMorePages() {
		return nil, fmt.Errorf("no more pages available")
	}

	params := *p.params
	params.NextToken = p.nextToken

	var limit *int32
	if p.options.Limit > 0 {
		limit = &p.options.Limit
	}
	params.MaxResults = limit

	result, err := p.client.GetSegmentDetection(ctx, &params, optFns...)
	if err != nil {
		return nil, err
	}
	p.firstPage = false

	prevToken := p.nextToken
	p.nextToken = result.NextToken

	if p.options.StopOnDuplicateToken && prevToken != nil && p.nextToken != nil && *prevToken == *p.nextToken {
		p.nextToken = nil
	}

	return result, nil
}

func newServiceMetadataMiddleware_opGetSegmentDetection(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "rekognition",
		OperationName: "GetSegmentDetection",
	}
}