MP3 File Source

The MP3 file source parses MP3 files.

The MP3 file source outputs buffers that contain MPEG-1 audio frames. It does not decode the audio.

File Extensions and MIME Types

The MP3 file source is the default media source for the following file name extension:

• .mp3

It is also the default media source for the following MIME types.

• audio/mpeg
• audio/x-mp3
• audio/x-mpeg

Media Types

The media type offered by the MP3 file source contains the following attributes.

Attribute	Description
MF_MT_MAJOR_TYPE	Equal to MFMediaType_Audio.
MF_MT_SUBTYPE	Equal to MFAudioFormat_MP3 or MFAudioFormat_MPEG.
MF_MT_AUDIO_AVG_BYTES_PER_SECOND	Average number of bytes per second.
MF_MT_AUDIO_BLOCK_ALIGNMENT	Equal to 1.
MF_MT_AUDIO_NUM_CHANNELS	Number of audio channels.
MF_MT_AUDIO_SAMPLES_PER_SECOND	Number of audio samples per second.
MF_MT_USER_DATA	Contains the portion of a MPEGLAYER3WAVEFORMAT structure that appears after the wfx member of the structure.

 

Interfaces

The MP3 file source exposes the following interfaces through QueryInterface:

• IMFGetService
• IMFMediaEventGenerator
• IMFMediaSource

In addition, it exposes the following interfaces through IMFGetService:

Service GUID	Interface
MF_METADATA_PROVIDER_SERVICE	IMFMetadataProvider
MF_PROPERTY_HANDLER_SERVICE	IPropertyStore Note: See Shell Metadata Providers.
MF_RATE_CONTROL_SERVICE	IMFRateControl
MF_RATE_CONTROL_SERVICE	IMFRateSupport

 

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
DLL	Mf.dll

See also

Media Sources and Sinks

Media Sources

Source Resolver

Supported Media Formats in Media Foundation