feat: add AUDIO_INPUT protocol crate

.agents/skills/commit-scope/SKILL.md

@@ -11,7 +11,7 @@ Choose at most one optional scope for `<type>[optional scope][!]: <description>`
 
 ```text
 meta core error pdu str bulk graphics config input connector session driver
-svc dvc cliprdr rdpdr rdpsnd displaycontrol echo egfx rdpeudp rdpeusb rdpemt rdcleanpath
+svc dvc cliprdr rdpdr rdpsnd rdpeai displaycontrol echo egfx rdpeudp rdpeusb rdpemt rdcleanpath
 tls mstsgu vmconnect
 
 client viewer agent daemon rpc activex server web ffi replay
@@ -29,6 +29,7 @@ Use these aggregate mappings:
 - `driver`: `ironrdp-async`, `ironrdp-blocking`, `ironrdp-tokio`, and `ironrdp-futures`.
 - `dvc`: DRDYNVC infrastructure, the COM plugin, and the pipe proxy, but not specific dynamic channels.
 - `cliprdr`, `rdpdr`, and `rdpsnd`: each protocol and its format or native support crates.
+- `rdpeai`: MS-RDPEAI audio input protocol and related client capture wiring.
 - `server`: `ironrdp-acceptor` and `ironrdp-server`.
 - `web`: WASM bindings, the Rust web helper, and everything under `web-client`.
 - `ffi`: the Rust FFI and generated or manual .NET bindings, but not ActiveX.

crates/ironrdp-rdpeai/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "ironrdp-rdpeai"
+version = "0.1.0"
+readme = "README.md"
+description = "AUDIO_INPUT dynamic channel for audio capture as described in MS-RDPEAI"
+edition.workspace = true
+rust-version = "1.94"
+license.workspace = true
+homepage.workspace = true
+repository.workspace = true
+authors.workspace = true
+keywords.workspace = true
+categories.workspace = true
+
+publish = false
+
+[lib]
+doctest = false
+test = false
+
+[dependencies]
+ironrdp-core = { path = "../ironrdp-core", version = "0.2", features = ["alloc"] }
+ironrdp-dvc = { path = "../ironrdp-dvc", version = "0.8" } # public
+ironrdp-pdu = { path = "../ironrdp-pdu", version = "0.9", features = ["alloc"] } # public
+ironrdp-rdpsnd = { path = "../ironrdp-rdpsnd", version = "0.9" } # public — shared AUDIO_FORMAT
+ironrdp-svc = { path = "../ironrdp-svc", version = "0.8" } # public
+tracing = { version = "0.1", features = ["log"] }
+
+[lints]
+workspace = true

crates/ironrdp-rdpeai/README.md

@@ -0,0 +1,14 @@
+# IronRDP AUDIO_INPUT (MS-RDPEAI)
+
+Client-side [MS-RDPEAI][1] implementation over Dynamic Virtual Channels [MS-RDPEDYC][2].
+
+This library includes:
+
+- AUDIO_INPUT PDU parse/serialize (`MSG_SNDIN_*`)
+- Dynamic virtual channel client processor
+- Capture backend trait for feeding PCM packets upstream
+
+Minimum supported codec: `WAVE_FORMAT_PCM` (0x0001).
+
+[1]: https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpeai/2eb8be0c-4f17-418b-9911-edb8d2ffcde5
+[2]: https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpedyc/3bd53020-9b64-4c9a-97fc-90a79e7e1e06