2.2.4.1 Playback Acknowledgment Message (PLAYBACK_ACK)
The PLAYBACK_ACK message is sent from the client to the server to acknowledge the media data that has already been played.
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Header (variable) |
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StreamId |
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DataDuration |
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cbData |
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Header (variable): The common message header (as specified in section 2.2.1). The InterfaceId field MUST be set to 0x00000001. The Mask field MUST be set to STREAM_ID_PROXY. The FunctionId field MUST be set to PLAYBACK_ACK (0x00000100).
StreamId (4 bytes): A 32-bit unsigned integer that indicates the stream ID of the sample that is being acknowledged.
DataDuration (8 bytes): A 64-bit unsigned integer that indicates the calculated data duration of the sample that is being acknowledged. This field MUST be set to the ThrottleDuration field of the TS_MM_DATA_SAMPLE structure of the sample that is being acknowledged.
cbData (8 bytes): A 64-bit unsigned integer that indicates the data size of the sample that is being acknowledged. This field MUST be set to the cbData field of the TS_MM_DATA_SAMPLE structure of the sample that is being acknowledged.