MediaTypes

Namespace: Vercel.AI.ProviderUtils

public static class MediaTypes

Detects IANA media types from file signatures. Maps to detectMediaType.

Inheritance: object

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Fields

MaxId3TagBytes

public const int MaxId3TagBytes = 131072

Largest ID3v2 tag skipped before the audio frame.

Value: int

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Methods

DetectMediaType(byte[], string?)

public static string? DetectMediaType(byte[] data, string? topLevelType = null)

Detects a media type from raw bytes or a base64 string. When <code class=“paramref”>topLevelType</code> is omitted, image, document, audio, and video signatures are considered.

Parameters

Name	Type	Description
data	byte[]
topLevelType	string

Returns: string

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DetectMediaType(string, string?)

public static string? DetectMediaType(string base64, string? topLevelType = null)

Detects a media type from a base64 string. See String).

Parameters

Name	Type	Description
base64	string
topLevelType	string

Returns: string

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GetTopLevelMediaType(string)

public static string GetTopLevelMediaType(string mediaType)

Returns the segment before the first slash. Maps to getTopLevelMediaType.

Parameters

Name	Type	Description
mediaType	string

Returns: string

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IsFullMediaType(string)

public static bool IsFullMediaType(string mediaType)

True for type/subtype when the subtype is non-empty and not *. Maps to isFullMediaType.

Parameters

Name	Type	Description
mediaType	string

Returns: bool

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ResolveFullMediaType(string, byte[]?)

public static string ResolveFullMediaType(string mediaType, byte[]? inlineData)

Resolves a media type for inline bytes, or null when the file is not inline. See ResolveFullMediaType(LanguageModelFilePart).

Parameters

Name	Type	Description
mediaType	string
inlineData	byte[]

Returns: string

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ResolveFullMediaType(LanguageModelFilePart)

public static string ResolveFullMediaType(LanguageModelFilePart file)

Returns the file part media type when it has a subtype. Otherwise detects the subtype from the file part data, which is the file part’s bytes or base64 text, or null when the file is not inline. Maps to resolveFullMediaType.

Parameters

Name	Type	Description
file	LanguageModelFilePart

Returns: string

Exceptions

Type	Condition
UnsupportedFunctionalityException	The subtype cannot be resolved.

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