Octopus Speech-to-Index
iOS API

API Reference for the Octopus iOS SDK (Cocoapod)

Octopus

public class Octopus { }

Class for the Octopus Speech-to-Index engine.

Octopus.pcmDataSampleRate

public static let pcmDataSampleRate: Int

Required audio sample rate for PCM data

Octopus.version

public static let version: String

Octopus version

Octopus.init()

public init(accessKey: String, modelPath:String? = nil) throws

Constructor for the Octopus class

Parameters

• accessKey String : The AccessKey obtained from Picovoice Console.
• modelPath String? : Absolute path to file containing model parameters (.pv).

Throws

• OctopusError: If an error occurs while creating an instance of Octopus.

Octopus.delete()

public func delete()

Releases resources acquired by Octopus.

Octopus.indexAudioData()

public func indexAudioData(pcm:[Int16]) throws -> OctopusMetadata

Parameters

• pcm [Int16] : An array of audio samples. The audio needs to have a sample rate equal to pcmDataSampleRate and be single-channel, 16-bit linearly-encoded.

Returns

• OctopusMetadata : OctopusMetadata object that is used to perform searches.

Throws

• OctopusError : If an error occurs while processing the pcm array.

Octopus.indexAudioFile()

public func indexAudioFile(path:String) throws -> OctopusMetadata

Parameters

• path String : Absolute path to an audio file. Supported formats are: FLAC, MP3, Ogg, Opus, Vorbis, WAV, and WebM.

Returns

• OctopusMetadata : OctopusMetadata object that is used to perform searches.

Throws

• OctopusError : If an error occurs while processing the audio file.

Octopus.search()

public func search(metadata: OctopusMetadata, phrases:Set<String>) throws -> Dictionary<String, [OctopusMatch]>

Parameters

• metadata OctopusMetadata : An OctopusMetadata object obtained via indexAudioData or indexAudioFile.
• phrases Set<String> : A set of phrases to search for in the metadata.
• Returns
• Dictionary<String, [OctopusMatch]> : A dictionary of phrases and match arrays. Matches are represented by immutable OctopusMatch objects.

Throws

• OctopusError : If an error occurs while processing the searching the metadata.

OctopusError

public enum OctopusError: Error { }

Error type thrown by the Octopus iOS SDK.

case OctopusOutOfMemoryError(_ message:String)
case OctopusIOError(_ message:String)
case OctopusInvalidArgumentError(_ message:String)
case OctopusStopIterationError(_ message:String)
case OctopusKeyError(_ message:String)
case OctopusInvalidStateError(_ message:String)
case OctopusRuntimeError(_ message:String)
case OctopusActivationError(_ message:String)
case OctopusActivationLimitError(_ message:String)
case OctopusActivationThrottledError(_ message:String)
case OctopusActivationRefusedError(_ message:String)
case OctopusInternalError(_ message:String)

OctopusMatch

public struct OctopusMatch { }

The type representing a matched search result.

OctopusMatch.startSec

public let startSec: Float

Start time of match in seconds

OctopusMatch.endSec

public let endSec: Float

End time of match in seconds

OctopusMatch.probability

public let probability: Float

Probability of the match being correct (floating-point value between [0, 1]).

OctopusMetadata

public class OctopusMetadata { }

The class representing audio indexed by Octopus. Returned by Octopus.indexAudioData or Octopus.indexAudioFile.

OctopusMetadata.init()

public init(metadataBytes:[UInt8])

Constructor.

Parameters

• metadataBytes [UInt8] : A byte array that was previously obtained via getBytes.

OctopusMetadata.delete()

public func delete()

Releases resources acquired by OctopusMetadata.

OctopusMetadata.getBytes()

public func getBytes() throws -> [UInt8]

Gets a binary representation of the metadata.

Returns

• [UInt8] : A byte array of the metadata.

Throws

• OctopusError : If an error occurs while retrieving the metadata bytes.