IqStreamDescriptor
| Frame
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{{{frame}}}, field {{{field}}}
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| Member
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{{{member}}}
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| Direction
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Server → client
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| Session
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Receiver
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| Roles
|
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| Permission
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None
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| Answered by
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| Answers
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ReceiverSessionRequest
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| Defined in
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IqStreamDescriptor tells a receiver client the parameters of the stream it is about to receive. The server sends it once, after accepting a ReceiverSessionRequest, before the first IQ block. Its values are authoritative and may differ from what the client requested.
Layout
| Field |
Type |
Description
|
packetId |
u8 |
Always 1.
|
sampleRate |
i32 |
Negotiated sample rate in complex samples per second.
|
centerFreqHz |
f32 |
Centre frequency in hertz.
|
chunkSamples |
i32 |
Number of complex samples in every following IQ block.
|
sampleFormat |
i8 |
0 = INT8, 1 = INT16. Servers currently always send 1.
|
Usage
- Size buffers from
chunkSamples and sampleFormat: each IqBlock payload is exactly 4 + chunkSamples × 2 × bytesPerComponent bytes, where bytesPerComponent is 2 for INT16 and 1 for INT8.
- No second descriptor is sent after a ReceiverRetune. Track the current frequency on the client side.
See also
