MXL reads channel_count (plain integer) to determine grain buffer
geometry, defaulting to 1 if absent. The NMOS IS-04 channels array
is ignored by MXL. Without channel_count, stereo audio grains were
half the required size.
Also: MXL only accepts bit_depth 32 or 64 for audio flows.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
MXL FlowParser requires urn:x-nmos:tag:grouphint/v1.0 in the tags
object of every flow definition. make_audio_flow_def was missing tags
entirely, causing FlowParser.cpp:192 "Invalid group hint tag".
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- FlowDef.hpp: add make_audio_flow_def (NMOS IS-04 audio/Lnn flow)
- NDIReceiver: replace capture_v210 with capture() — single recv call
dispatches to FrameKind::{Video,Audio,None}; AudioInfo struct carries
sample_rate/channels/samples/channel_stride
- ndiin: optional audio writer when graph wires audio_flow_id; single
loop with 5ms NDI poll; audio grains written immediately on arrival;
video grains written when mxlGetCurrentIndex reaches video_index
- build_graph: rename ndiin video port flow_id → video_flow_id; add
audio_flow_id edge (no sink yet — wired to ndiin only)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
JohannesItten