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// Copyright 2021 Google LLC
// 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
// Code generated by protoc-gen-go_gapic. DO NOT EDIT.
package videointelligence
import (
lroauto ""
gax ""
gtransport ""
videointelligencepb ""
longrunningpb ""
var newClientHook clientHook
// CallOptions contains the retry settings for each method of Client.
type CallOptions struct {
AnnotateVideo []gax.CallOption
func defaultClientOptions() []option.ClientOption {
return []option.ClientOption{
func defaultCallOptions() *CallOptions {
return &CallOptions{
AnnotateVideo: []gax.CallOption{
gax.WithRetry(func() gax.Retryer {
return gax.OnCodes([]codes.Code{
}, gax.Backoff{
Initial: 1000 * time.Millisecond,
Max: 120000 * time.Millisecond,
Multiplier: 2.50,
// Client is a client for interacting with Google Cloud Video Intelligence API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type Client struct {
// Connection pool of gRPC connections to the service.
connPool gtransport.ConnPool
// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
disableDeadlines bool
// The gRPC API client.
client videointelligencepb.VideoIntelligenceServiceClient
// LROClient is used internally to handle longrunning operations.
// It is exposed so that its CallOptions can be modified if required.
// Users should not Close this client.
LROClient *lroauto.OperationsClient
// The call options for this service.
CallOptions *CallOptions
// The x-goog-* metadata to be sent with each request.
xGoogMetadata metadata.MD
// NewClient creates a new video intelligence service client.
// Service that implements Google Cloud Video Intelligence API.
func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error) {
clientOpts := defaultClientOptions()
if newClientHook != nil {
hookOpts, err := newClientHook(ctx, clientHookParams{})
if err != nil {
return nil, err
clientOpts = append(clientOpts, hookOpts...)
disableDeadlines, err := checkDisableDeadlines()
if err != nil {
return nil, err
connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
if err != nil {
return nil, err
c := &Client{
connPool: connPool,
disableDeadlines: disableDeadlines,
CallOptions: defaultCallOptions(),
client: videointelligencepb.NewVideoIntelligenceServiceClient(connPool),
c.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
if err != nil {
// This error "should not happen", since we are just reusing old connection pool
// and never actually need to dial.
// If this does happen, we could leak connp. However, we cannot close conn:
// If the user invoked the constructor with option.WithGRPCConn,
// we would close a connection that's still in use.
// TODO: investigate error conditions.
return nil, err
return c, nil
// Connection returns a connection to the API service.
// Deprecated.
func (c *Client) Connection() *grpc.ClientConn {
return c.connPool.Conn()
// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *Client) Close() error {
return c.connPool.Close()
// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *Client) setGoogleClientInfo(keyval ...string) {
kv := append([]string{"gl-go", versionGo()}, keyval...)
kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
// AnnotateVideo performs asynchronous video annotation. Progress and results can be
// retrieved through the google.longrunning.Operations interface.
// Operation.metadata contains AnnotateVideoProgress (progress).
// Operation.response contains AnnotateVideoResponse (results).
func (c *Client) AnnotateVideo(ctx context.Context, req *videointelligencepb.AnnotateVideoRequest, opts ...gax.CallOption) (*AnnotateVideoOperation, error) {
if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
defer cancel()
ctx = cctx
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.AnnotateVideo[0:len(c.CallOptions.AnnotateVideo):len(c.CallOptions.AnnotateVideo)], opts...)
var resp *longrunningpb.Operation
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.client.AnnotateVideo(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
return &AnnotateVideoOperation{
lro: longrunning.InternalNewOperation(c.LROClient, resp),
}, nil
// AnnotateVideoOperation manages a long-running operation from AnnotateVideo.
type AnnotateVideoOperation struct {
lro *longrunning.Operation
// AnnotateVideoOperation returns a new AnnotateVideoOperation from a given name.
// The name must be that of a previously created AnnotateVideoOperation, possibly from a different process.
func (c *Client) AnnotateVideoOperation(name string) *AnnotateVideoOperation {
return &AnnotateVideoOperation{
lro: longrunning.InternalNewOperation(c.LROClient, &longrunningpb.Operation{Name: name}),
// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
// See documentation of Poll for error-handling information.
func (op *AnnotateVideoOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*videointelligencepb.AnnotateVideoResponse, error) {
var resp videointelligencepb.AnnotateVideoResponse
if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
return nil, err
return &resp, nil
// Poll fetches the latest state of the long-running operation.
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *AnnotateVideoOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*videointelligencepb.AnnotateVideoResponse, error) {
var resp videointelligencepb.AnnotateVideoResponse
if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
return nil, err
if !op.Done() {
return nil, nil
return &resp, nil
// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *AnnotateVideoOperation) Metadata() (*videointelligencepb.AnnotateVideoProgress, error) {
var meta videointelligencepb.AnnotateVideoProgress
if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
return nil, nil
} else if err != nil {
return nil, err
return &meta, nil
// Done reports whether the long-running operation has completed.
func (op *AnnotateVideoOperation) Done() bool {
return op.lro.Done()
// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *AnnotateVideoOperation) Name() string {
return op.lro.Name()