google/cloud/videointelligence/v1p3beta1/video_intelligence.proto

// Copyright 2018 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
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

syntax = "proto3";

package google.cloud.videointelligence.v1p3beta1;

import "google/api/annotations.proto";
import "google/longrunning/operations.proto";
import "google/protobuf/duration.proto";
import "google/protobuf/timestamp.proto";
import "google/rpc/status.proto";

option csharp_namespace = "Google.Cloud.VideoIntelligence.V1P3Beta1";
option go_package = "google.golang.org/genproto/googleapis/cloud/videointelligence/v1p3beta1;videointelligence";
option java_multiple_files = true;
option java_outer_classname = "VideoIntelligenceServiceProto";
option java_package = "com.google.cloud.videointelligence.v1p3beta1";
option php_namespace = "Google\\Cloud\\VideoIntelligence\\V1p3beta1";

// Service that implements Google Cloud Video Intelligence API.
service VideoIntelligenceService {
  // 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).
  rpc AnnotateVideo(AnnotateVideoRequest)
      returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v1p3beta1/videos:annotate"
      body: "*"
    };
  }
}

// Service that implements Google Cloud Video Intelligence Streaming API.
service StreamingVideoIntelligenceService {
  // Performs video annotation with bidirectional streaming: emitting results
  // while sending video/audio bytes.
  // This method is only available via the gRPC API (not REST).
  rpc StreamingAnnotateVideo(stream StreamingAnnotateVideoRequest)
      returns (stream StreamingAnnotateVideoResponse);
}

// Video annotation request.
message AnnotateVideoRequest {
  // Input video location. Currently, only
  // [Google Cloud Storage](https://cloud.google.com/storage/) URIs are
  // supported, which must be specified in the following format:
  // `gs://bucket-id/object-id` (other URI formats return
  // [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]). For
  // more information, see [Request URIs](/storage/docs/reference-uris). A video
  // URI may include wildcards in `object-id`, and thus identify multiple
  // videos. Supported wildcards: '*' to match 0 or more characters;
  // '?' to match 1 character. If unset, the input video should be embedded
  // in the request as `input_content`. If set, `input_content` should be unset.
  string input_uri = 1;

  // The video data bytes.
  // If unset, the input video(s) should be specified via `input_uri`.
  // If set, `input_uri` should be unset.
  bytes input_content = 6;

  // Requested video annotation features.
  repeated Feature features = 2;

  // Additional video context and/or feature-specific parameters.
  VideoContext video_context = 3;

  // Optional location where the output (in JSON format) should be stored.
  // Currently, only [Google Cloud Storage](https://cloud.google.com/storage/)
  // URIs are supported, which must be specified in the following format:
  // `gs://bucket-id/object-id` (other URI formats return
  // [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]). For
  // more information, see [Request URIs](/storage/docs/reference-uris).
  string output_uri = 4;

  // Optional cloud region where annotation should take place. Supported cloud
  // regions: `us-east1`, `us-west1`, `europe-west1`, `asia-east1`. If no region
  // is specified, a region will be determined based on video file location.
  string location_id = 5;
}

// Video context and/or feature-specific parameters.
message VideoContext {
  // Video segments to annotate. The segments may overlap and are not required
  // to be contiguous or span the whole video. If unspecified, each video is
  // treated as a single segment.
  repeated VideoSegment segments = 1;

  // Config for LABEL_DETECTION.
  LabelDetectionConfig label_detection_config = 2;

  // Config for SHOT_CHANGE_DETECTION.
  ShotChangeDetectionConfig shot_change_detection_config = 3;

  // Config for EXPLICIT_CONTENT_DETECTION.
  ExplicitContentDetectionConfig explicit_content_detection_config = 4;

  // Config for SPEECH_TRANSCRIPTION.
  SpeechTranscriptionConfig speech_transcription_config = 6;

  // Config for TEXT_DETECTION.
  TextDetectionConfig text_detection_config = 8;

  // Config for OBJECT_TRACKING.
  ObjectTrackingConfig object_tracking_config = 13;
}

// Config for LABEL_DETECTION.
message LabelDetectionConfig {
  // What labels should be detected with LABEL_DETECTION, in addition to
  // video-level labels or segment-level labels.
  // If unspecified, defaults to `SHOT_MODE`.
  LabelDetectionMode label_detection_mode = 1;

  // Whether the video has been shot from a stationary (i.e. non-moving) camera.
  // When set to true, might improve detection accuracy for moving objects.
  // Should be used with `SHOT_AND_FRAME_MODE` enabled.
  bool stationary_camera = 2;

  // Model to use for label detection.
  // Supported values: "builtin/stable" (the default if unset) and
  // "builtin/latest".
  string model = 3;

  // The confidence threshold we perform filtering on the labels from
  // frame-level detection. If not set, it is set to 0.4 by default. The valid
  // range for this threshold is [0.1, 0.9]. Any value set outside of this
  // range will be clipped.
  // Note: for best results please follow the default threshold. We will update
  // the default threshold everytime when we release a new model.
  float frame_confidence_threshold = 4;

  // The confidence threshold we perform filtering on the labels from
  // video-level and shot-level detections. If not set, it is set to 0.3 by
  // default. The valid range for this threshold is [0.1, 0.9]. Any value set
  // outside of this range will be clipped.
  // Note: for best results please follow the default threshold. We will update
  // the default threshold everytime when we release a new model.
  float video_confidence_threshold = 5;
}

// Config for SHOT_CHANGE_DETECTION.
message ShotChangeDetectionConfig {
  // Model to use for shot change detection.
  // Supported values: "builtin/stable" (the default if unset) and
  // "builtin/latest".
  string model = 1;
}

// Config for OBJECT_TRACKING.
message ObjectTrackingConfig {
  // Model to use for object tracking.
  // Supported values: "builtin/stable" (the default if unset) and
  // "builtin/latest".
  string model = 1;
}

// Config for EXPLICIT_CONTENT_DETECTION.
message ExplicitContentDetectionConfig {
  // Model to use for explicit content detection.
  // Supported values: "builtin/stable" (the default if unset) and
  // "builtin/latest".
  string model = 1;
}

// Config for TEXT_DETECTION.
message TextDetectionConfig {
  // Language hint can be specified if the language to be detected is known a
  // priori. It can increase the accuracy of the detection. Language hint must
  // be language code in BCP-47 format.
  //
  // Automatic language detection is performed if no hint is provided.
  repeated string language_hints = 1;

  // Model to use for text detection.
  // Supported values: "builtin/stable" (the default if unset) and
  // "builtin/latest".
  string model = 2;
}

// Video segment.
message VideoSegment {
  // Time-offset, relative to the beginning of the video,
  // corresponding to the start of the segment (inclusive).
  google.protobuf.Duration start_time_offset = 1;

  // Time-offset, relative to the beginning of the video,
  // corresponding to the end of the segment (inclusive).
  google.protobuf.Duration end_time_offset = 2;
}

// Video segment level annotation results for label detection.
message LabelSegment {
  // Video segment where a label was detected.
  VideoSegment segment = 1;

  // Confidence that the label is accurate. Range: [0, 1].
  float confidence = 2;
}

// Video frame level annotation results for label detection.
message LabelFrame {
  // Time-offset, relative to the beginning of the video, corresponding to the
  // video frame for this location.
  google.protobuf.Duration time_offset = 1;

  // Confidence that the label is accurate. Range: [0, 1].
  float confidence = 2;
}

// Detected entity from video analysis.
message Entity {
  // Opaque entity ID. Some IDs may be available in
  // [Google Knowledge Graph Search
  // API](https://developers.google.com/knowledge-graph/).
  string entity_id = 1;

  // Textual description, e.g. `Fixed-gear bicycle`.
  string description = 2;

  // Language code for `description` in BCP-47 format.
  string language_code = 3;
}

// Label annotation.
message LabelAnnotation {
  // Detected entity.
  Entity entity = 1;

  // Common categories for the detected entity.
  // E.g. when the label is `Terrier` the category is likely `dog`. And in some
  // cases there might be more than one categories e.g. `Terrier` could also be
  // a `pet`.
  repeated Entity category_entities = 2;

  // All video segments where a label was detected.
  repeated LabelSegment segments = 3;

  // All video frames where a label was detected.
  repeated LabelFrame frames = 4;
}

// Video frame level annotation results for explicit content.
message ExplicitContentFrame {
  // Time-offset, relative to the beginning of the video, corresponding to the
  // video frame for this location.
  google.protobuf.Duration time_offset = 1;

  // Likelihood of the pornography content..
  Likelihood pornography_likelihood = 2;
}

// Explicit content annotation (based on per-frame visual signals only).
// If no explicit content has been detected in a frame, no annotations are
// present for that frame.
message ExplicitContentAnnotation {
  // All video frames where explicit content was detected.
  repeated ExplicitContentFrame frames = 1;
}

// Normalized bounding box.
// The normalized vertex coordinates are relative to the original image.
// Range: [0, 1].
message NormalizedBoundingBox {
  // Left X coordinate.
  float left = 1;

  // Top Y coordinate.
  float top = 2;

  // Right X coordinate.
  float right = 3;

  // Bottom Y coordinate.
  float bottom = 4;
}

// For tracking related features, such as LOGO_RECOGNITION, FACE_DETECTION,
// CELEBRITY_RECOGNITION, PERSON_DETECTION.
// An object at time_offset with attributes, and located with
// normalized_bounding_box.
message TimestampedObject {
  // Normalized Bounding box in a frame, where the object is located.
  NormalizedBoundingBox normalized_bounding_box = 1;

  // Time-offset, relative to the beginning of the video,
  // corresponding to the video frame for this object.
  google.protobuf.Duration time_offset = 2;

  // Optional. The attributes of the object in the bounding box.
  repeated DetectedAttribute attributes = 3;
}

// A track of an object instance.
message Track {
  // Video segment of a track.
  VideoSegment segment = 1;

  // The object with timestamp and attributes per frame in the track.
  repeated TimestampedObject timestamped_objects = 2;

  // Optional. Attributes in the track level.
  repeated DetectedAttribute attributes = 3;

  // Optional. The confidence score of the tracked object.
  float confidence = 4;
}

// A generic detected attribute represented by name in string format.
message DetectedAttribute {
  // The name of the attribute, i.e. glasses, dark_glasses, mouth_open etc.
  // A full list of supported type names will be provided in the document.
  string name = 1;

  // Detected attribute confidence. Range [0, 1].
  float confidence = 2;

  // Text value of the detection result. For example, the value for "HairColor"
  // can be "black", "blonde", etc.
  string value = 3;
}

// Annotation results for a single video.
message VideoAnnotationResults {
  // Video file location in
  // [Google Cloud Storage](https://cloud.google.com/storage/).
  string input_uri = 1;

  // Label annotations on video level or user specified segment level.
  // There is exactly one element for each unique label.
  repeated LabelAnnotation segment_label_annotations = 2;

  // Label annotations on shot level.
  // There is exactly one element for each unique label.
  repeated LabelAnnotation shot_label_annotations = 3;

  // Label annotations on frame level.
  // There is exactly one element for each unique label.
  repeated LabelAnnotation frame_label_annotations = 4;

  // Shot annotations. Each shot is represented as a video segment.
  repeated VideoSegment shot_annotations = 6;

  // Explicit content annotation.
  ExplicitContentAnnotation explicit_annotation = 7;

  // Speech transcription.
  repeated SpeechTranscription speech_transcriptions = 11;

  // OCR text detection and tracking.
  // Annotations for list of detected text snippets. Each will have list of
  // frame information associated with it.
  repeated TextAnnotation text_annotations = 12;

  // Annotations for list of objects detected and tracked in video.
  repeated ObjectTrackingAnnotation object_annotations = 14;

  // Annotations for list of logos detected, tracked and recognized in video.
  repeated LogoRecognitionAnnotation logo_recognition_annotations = 19;

  // If set, indicates an error. Note that for a single `AnnotateVideoRequest`
  // some videos may succeed and some may fail.
  google.rpc.Status error = 9;
}

// Video annotation response. Included in the `response`
// field of the `Operation` returned by the `GetOperation`
// call of the `google::longrunning::Operations` service.
message AnnotateVideoResponse {
  // Annotation results for all videos specified in `AnnotateVideoRequest`.
  repeated VideoAnnotationResults annotation_results = 1;
}

// Annotation progress for a single video.
message VideoAnnotationProgress {
  // Video file location in
  // [Google Cloud Storage](https://cloud.google.com/storage/).
  string input_uri = 1;

  // Approximate percentage processed thus far. Guaranteed to be
  // 100 when fully processed.
  int32 progress_percent = 2;

  // Time when the request was received.
  google.protobuf.Timestamp start_time = 3;

  // Time of the most recent update.
  google.protobuf.Timestamp update_time = 4;
}

// Video annotation progress. Included in the `metadata`
// field of the `Operation` returned by the `GetOperation`
// call of the `google::longrunning::Operations` service.
message AnnotateVideoProgress {
  // Progress metadata for all videos specified in `AnnotateVideoRequest`.
  repeated VideoAnnotationProgress annotation_progress = 1;
}

// Config for SPEECH_TRANSCRIPTION.
message SpeechTranscriptionConfig {
  // *Required* The language of the supplied audio as a
  // [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag.
  // Example: "en-US".
  // See [Language Support](https://cloud.google.com/speech/docs/languages)
  // for a list of the currently supported language codes.
  string language_code = 1;

  // *Optional* Maximum number of recognition hypotheses to be returned.
  // Specifically, the maximum number of `SpeechRecognitionAlternative` messages
  // within each `SpeechTranscription`. The server may return fewer than
  // `max_alternatives`. Valid values are `0`-`30`. A value of `0` or `1` will
  // return a maximum of one. If omitted, will return a maximum of one.
  int32 max_alternatives = 2;

  // *Optional* If set to `true`, the server will attempt to filter out
  // profanities, replacing all but the initial character in each filtered word
  // with asterisks, e.g. "f***". If set to `false` or omitted, profanities
  // won't be filtered out.
  bool filter_profanity = 3;

  // *Optional* A means to provide context to assist the speech recognition.
  repeated SpeechContext speech_contexts = 4;

  // *Optional* If 'true', adds punctuation to recognition result hypotheses.
  // This feature is only available in select languages. Setting this for
  // requests in other languages has no effect at all. The default 'false' value
  // does not add punctuation to result hypotheses. NOTE: "This is currently
  // offered as an experimental service, complimentary to all users. In the
  // future this may be exclusively available as a premium feature."
  bool enable_automatic_punctuation = 5;

  // *Optional* For file formats, such as MXF or MKV, supporting multiple audio
  // tracks, specify up to two tracks. Default: track 0.
  repeated int32 audio_tracks = 6;

  // *Optional* If 'true', enables speaker detection for each recognized word in
  // the top alternative of the recognition result using a speaker_tag provided
  // in the WordInfo.
  // Note: When this is true, we send all the words from the beginning of the
  // audio for the top alternative in every consecutive responses.
  // This is done in order to improve our speaker tags as our models learn to
  // identify the speakers in the conversation over time.
  bool enable_speaker_diarization = 7;

  // *Optional*
  // If set, specifies the estimated number of speakers in the conversation.
  // If not set, defaults to '2'.
  // Ignored unless enable_speaker_diarization is set to true.
  int32 diarization_speaker_count = 8;

  // *Optional* If `true`, the top result includes a list of words and the
  // confidence for those words. If `false`, no word-level confidence
  // information is returned. The default is `false`.
  bool enable_word_confidence = 9;
}

// Provides "hints" to the speech recognizer to favor specific words and phrases
// in the results.
message SpeechContext {
  // *Optional* A list of strings containing words and phrases "hints" so that
  // the speech recognition is more likely to recognize them. This can be used
  // to improve the accuracy for specific words and phrases, for example, if
  // specific commands are typically spoken by the user. This can also be used
  // to add additional words to the vocabulary of the recognizer. See
  // [usage limits](https://cloud.google.com/speech/limits#content).
  repeated string phrases = 1;
}

// A speech recognition result corresponding to a portion of the audio.
message SpeechTranscription {
  // May contain one or more recognition hypotheses (up to the maximum specified
  // in `max_alternatives`).  These alternatives are ordered in terms of
  // accuracy, with the top (first) alternative being the most probable, as
  // ranked by the recognizer.
  repeated SpeechRecognitionAlternative alternatives = 1;

  // Output only. The
  // [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag of the
  // language in this result. This language code was detected to have the most
  // likelihood of being spoken in the audio.
  string language_code = 2;
}

// Alternative hypotheses (a.k.a. n-best list).
message SpeechRecognitionAlternative {
  // Transcript text representing the words that the user spoke.
  string transcript = 1;

  // The confidence estimate between 0.0 and 1.0. A higher number
  // indicates an estimated greater likelihood that the recognized words are
  // correct. This field is typically provided only for the top hypothesis, and
  // only for `is_final=true` results. Clients should not rely on the
  // `confidence` field as it is not guaranteed to be accurate or consistent.
  // The default of 0.0 is a sentinel value indicating `confidence` was not set.
  float confidence = 2;

  // A list of word-specific information for each recognized word.
  repeated WordInfo words = 3;
}

// Word-specific information for recognized words. Word information is only
// included in the response when certain request parameters are set, such
// as `enable_word_time_offsets`.
message WordInfo {
  // Time offset relative to the beginning of the audio, and
  // corresponding to the start of the spoken word. This field is only set if
  // `enable_word_time_offsets=true` and only in the top hypothesis. This is an
  // experimental feature and the accuracy of the time offset can vary.
  google.protobuf.Duration start_time = 1;

  // Time offset relative to the beginning of the audio, and
  // corresponding to the end of the spoken word. This field is only set if
  // `enable_word_time_offsets=true` and only in the top hypothesis. This is an
  // experimental feature and the accuracy of the time offset can vary.
  google.protobuf.Duration end_time = 2;

  // The word corresponding to this set of information.
  string word = 3;

  // Output only. The confidence estimate between 0.0 and 1.0. A higher number
  // indicates an estimated greater likelihood that the recognized words are
  // correct. This field is set only for the top alternative.
  // This field is not guaranteed to be accurate and users should not rely on it
  // to be always provided.
  // The default of 0.0 is a sentinel value indicating `confidence` was not set.
  float confidence = 4;

  // Output only. A distinct integer value is assigned for every speaker within
  // the audio. This field specifies which one of those speakers was detected to
  // have spoken this word. Value ranges from 1 up to diarization_speaker_count,
  // and is only set if speaker diarization is enabled.
  int32 speaker_tag = 5;
}

// A vertex represents a 2D point in the image.
// NOTE: the normalized vertex coordinates are relative to the original image
// and range from 0 to 1.
message NormalizedVertex {
  // X coordinate.
  float x = 1;

  // Y coordinate.
  float y = 2;
}

// Normalized bounding polygon for text (that might not be aligned with axis).
// Contains list of the corner points in clockwise order starting from
// top-left corner. For example, for a rectangular bounding box:
// When the text is horizontal it might look like:
//         0----1
//         |    |
//         3----2
//
// When it's clockwise rotated 180 degrees around the top-left corner it
// becomes:
//         2----3
//         |    |
//         1----0
//
// and the vertex order will still be (0, 1, 2, 3). Note that values can be less
// than 0, or greater than 1 due to trignometric calculations for location of
// the box.
message NormalizedBoundingPoly {
  // Normalized vertices of the bounding polygon.
  repeated NormalizedVertex vertices = 1;
}

// Video segment level annotation results for text detection.
message TextSegment {
  // Video segment where a text snippet was detected.
  VideoSegment segment = 1;

  // Confidence for the track of detected text. It is calculated as the highest
  // over all frames where OCR detected text appears.
  float confidence = 2;

  // Information related to the frames where OCR detected text appears.
  repeated TextFrame frames = 3;
}

// Video frame level annotation results for text annotation (OCR).
// Contains information regarding timestamp and bounding box locations for the
// frames containing detected OCR text snippets.
message TextFrame {
  // Bounding polygon of the detected text for this frame.
  NormalizedBoundingPoly rotated_bounding_box = 1;

  // Timestamp of this frame.
  google.protobuf.Duration time_offset = 2;
}

// Annotations related to one detected OCR text snippet. This will contain the
// corresponding text, confidence value, and frame level information for each
// detection.
message TextAnnotation {
  // The detected text.
  string text = 1;

  // All video segments where OCR detected text appears.
  repeated TextSegment segments = 2;
}

// Video frame level annotations for object detection and tracking. This field
// stores per frame location, time offset, and confidence.
message ObjectTrackingFrame {
  // The normalized bounding box location of this object track for the frame.
  NormalizedBoundingBox normalized_bounding_box = 1;

  // The timestamp of the frame in microseconds.
  google.protobuf.Duration time_offset = 2;
}

// Annotations corresponding to one tracked object.
message ObjectTrackingAnnotation {
  // Entity to specify the object category that this track is labeled as.
  Entity entity = 1;

  // Object category's labeling confidence of this track.
  float confidence = 4;

  // Information corresponding to all frames where this object track appears.
  // Non-streaming batch mode: it may be one or multiple ObjectTrackingFrame
  // messages in frames.
  // Streaming mode: it can only be one ObjectTrackingFrame message in frames.
  repeated ObjectTrackingFrame frames = 2;

  // Different representation of tracking info in non-streaming batch
  // and streaming modes.
  oneof track_info {
    // Non-streaming batch mode ONLY.
    // Each object track corresponds to one video segment where it appears.
    VideoSegment segment = 3;
    // Streaming mode ONLY.
    // In streaming mode, we do not know the end time of a tracked object
    // before it is completed. Hence, there is no VideoSegment info returned.
    // Instead, we provide a unique identifiable integer track_id so that
    // the customers can correlate the results of the ongoing
    // ObjectTrackAnnotation of the same track_id over time.
    int64 track_id = 5;
  }
}

// Annotation corresponding to one detected, tracked and recognized logo class.
message LogoRecognitionAnnotation {
  // Entity category information to specify the logo class that all the logo
  // tracks within this LogoRecognitionAnnotation are recognized as.
  Entity entity = 1;

  // All logo tracks where the recognized logo appears. Each track corresponds
  // to one logo instance appearing in consecutive frames.
  repeated Track tracks = 2;

  // All video segments where the recognized logo appears. There might be
  // multiple instances of the same logo class appearing in one VideoSegment.
  repeated VideoSegment segments = 3;
}

// The top-level message sent by the client for the `StreamingAnnotateVideo`
// method. Multiple `StreamingAnnotateVideoRequest` messages are sent.
// The first message must only contain a `StreamingVideoConfig` message.
// All subsequent messages must only contain `input_content` data.
message StreamingAnnotateVideoRequest {
  // *Required* The streaming request, which is either a streaming config or
  // video content.
  oneof streaming_request {
    // Provides information to the annotator, specifing how to process the
    // request. The first `AnnotateStreamingVideoRequest` message must only
    // contain a `video_config` message.
    StreamingVideoConfig video_config = 1;

    // The video data to be annotated. Chunks of video data are sequentially
    // sent in `StreamingAnnotateVideoRequest` messages. Except the initial
    // `StreamingAnnotateVideoRequest` message containing only
    // `video_config`, all subsequent `AnnotateStreamingVideoRequest`
    // messages must only contain `input_content` field.
    // Note: as with all bytes fields, protobuffers use a pure binary
    // representation (not base64).
    bytes input_content = 2;
  }
}

// `StreamingAnnotateVideoResponse` is the only message returned to the client
// by `StreamingAnnotateVideo`. A series of zero or more
// `StreamingAnnotateVideoResponse` messages are streamed back to the client.
message StreamingAnnotateVideoResponse {
  // If set, returns a [google.rpc.Status][google.rpc.Status] message that
  // specifies the error for the operation.
  google.rpc.Status error = 1;

  // Streaming annotation results.
  StreamingVideoAnnotationResults annotation_results = 2;

  // GCS URI that stores annotation results of one streaming session.
  // It is a directory that can hold multiple files in JSON format.
  // Example uri format:
  // gs://bucket_id/object_id/cloud_project_name-session_id
  string annotation_results_uri = 3;
}

// Config for AUTOML_CLASSIFICATION in streaming mode.
message StreamingAutomlClassificationConfig {
  // Resource name of AutoML model.
  // Format: `projects/{project_id}/locations/{location_id}/models/{model_id}`
  string model_name = 1;
}

// Config for AUTOML_OBJECT_TRACKING in streaming mode.
message StreamingAutomlObjectTrackingConfig {
  // Resource name of AutoML model.
  // Format: `projects/{project_id}/locations/{location_id}/models/{model_id}`
  string model_name = 1;
}

// Config for EXPLICIT_CONTENT_DETECTION in streaming mode.
message StreamingExplicitContentDetectionConfig {
  // No customized config support.
}

// Config for LABEL_DETECTION in streaming mode.
message StreamingLabelDetectionConfig {
  // Whether the video has been captured from a stationary (i.e. non-moving)
  // camera. When set to true, might improve detection accuracy for moving
  // objects. Default: false.
  bool stationary_camera = 1;
}

// Config for STREAMING_OBJECT_TRACKING.
message StreamingObjectTrackingConfig {
  // No customized config support.
}

// Config for SHOT_CHANGE_DETECTION in streaming mode.
message StreamingShotChangeDetectionConfig {
  // No customized config support.
}

// Config for streaming storage option.
message StreamingStorageConfig {
  // Enable streaming storage. Default: false.
  bool enable_storage_annotation_result = 1;

  // GCS URI to store all annotation results for one client. Client should
  // specify this field as the top-level storage directory. Annotation results
  // of different sessions will be put into different sub-directories denoted
  // by project_name and session_id. All sub-directories will be auto generated
  // by program and will be made accessible to client in response proto.
  // URIs must be specified in the following format: `gs://bucket-id/object-id`
  // `bucket-id` should be a valid GCS bucket created by client and bucket
  // permission shall also be configured properly. `object-id` can be arbitrary
  // string that make sense to client. Other URI formats will return error and
  // cause GCS write failure.
  string annotation_result_storage_directory = 3;
}

// Streaming annotation results corresponding to a portion of the video
// that is currently being processed.
message StreamingVideoAnnotationResults {
  // Shot annotation results. Each shot is represented as a video segment.
  repeated VideoSegment shot_annotations = 1;

  // Label annotation results.
  repeated LabelAnnotation label_annotations = 2;

  // Explicit content annotation results.
  ExplicitContentAnnotation explicit_annotation = 3;

  // Object tracking results.
  repeated ObjectTrackingAnnotation object_annotations = 4;
}

// Provides information to the annotator that specifies how to process the
// request.
message StreamingVideoConfig {
  // Requested annotation feature.
  StreamingFeature feature = 1;

  // Config for requested annotation feature.
  oneof streaming_config {
    // Config for STREAMING_SHOT_CHANGE_DETECTION.
    StreamingShotChangeDetectionConfig shot_change_detection_config = 2;

    // Config for STREAMING_LABEL_DETECTION.
    StreamingLabelDetectionConfig label_detection_config = 3;

    // Config for STREAMING_EXPLICIT_CONTENT_DETECTION.
    StreamingExplicitContentDetectionConfig explicit_content_detection_config =
        4;

    // Config for STREAMING_OBJECT_TRACKING.
    StreamingObjectTrackingConfig object_tracking_config = 5;

    // Config for STREAMING_AUTOML_CLASSIFICATION.
    StreamingAutomlClassificationConfig automl_classification_config = 21;

    // Config for STREAMING_AUTOML_OBJECT_TRACKING.
    StreamingAutomlObjectTrackingConfig automl_object_tracking_config = 22;
  }

  // Streaming storage option. By default: storage is disabled.
  StreamingStorageConfig storage_config = 30;
}

// Video annotation feature.
enum Feature {
  // Unspecified.
  FEATURE_UNSPECIFIED = 0;

  // Label detection. Detect objects, such as dog or flower.
  LABEL_DETECTION = 1;

  // Shot change detection.
  SHOT_CHANGE_DETECTION = 2;

  // Explicit content detection.
  EXPLICIT_CONTENT_DETECTION = 3;

  // Speech transcription.
  SPEECH_TRANSCRIPTION = 6;

  // OCR text detection and tracking.
  TEXT_DETECTION = 7;

  // Object detection and tracking.
  OBJECT_TRACKING = 9;

  // Logo detection, tracking, and recognition.
  LOGO_RECOGNITION = 12;
}

// Label detection mode.
enum LabelDetectionMode {
  // Unspecified.
  LABEL_DETECTION_MODE_UNSPECIFIED = 0;

  // Detect shot-level labels.
  SHOT_MODE = 1;

  // Detect frame-level labels.
  FRAME_MODE = 2;

  // Detect both shot-level and frame-level labels.
  SHOT_AND_FRAME_MODE = 3;
}

// Bucketized representation of likelihood.
enum Likelihood {
  // Unspecified likelihood.
  LIKELIHOOD_UNSPECIFIED = 0;

  // Very unlikely.
  VERY_UNLIKELY = 1;

  // Unlikely.
  UNLIKELY = 2;

  // Possible.
  POSSIBLE = 3;

  // Likely.
  LIKELY = 4;

  // Very likely.
  VERY_LIKELY = 5;
}

// Streaming video annotation feature.
enum StreamingFeature {
  // Unspecified.
  STREAMING_FEATURE_UNSPECIFIED = 0;
  // Label detection. Detect objects, such as dog or flower.
  STREAMING_LABEL_DETECTION = 1;
  // Shot change detection.
  STREAMING_SHOT_CHANGE_DETECTION = 2;
  // Explicit content detection.
  STREAMING_EXPLICIT_CONTENT_DETECTION = 3;
  // Object detection and tracking.
  STREAMING_OBJECT_TRACKING = 4;
  // Video classification based on AutoML model.
  STREAMING_AUTOML_CLASSIFICATION = 21;
  // Object detection and tracking based on AutoML model.
  STREAMING_AUTOML_OBJECT_TRACKING = 22;
}