amdtp_am824_midi_trigger(9)

✨ amdtp_am824_midi_trigger ✨

okay so this is a page straight out of the Kernel API Manual — yes, the kernel has a manual, and yes, it's kind of iconic 💅 this one is all about amdtp_am824_midi_trigger, and bestie, it's literally the start/stop button for playback and capture with a MIDI device 🎹

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🌸 NAME 🌸

amdtp_am824_midi_trigger — start/stop playback/capture with a MIDI device

so like, that's the whole vibe: you're triggering MIDI transmission on or off 🫶

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🦋 SYNOPSIS 🦋

void amdtp_am824_midi_trigger (struct amdtp_stream *s , unsigned int
port , struct snd_rawmidi_substream *midi );

copy it exactly, no cap 📋

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💖 ARGUMENTS 💖

• s — the AMDTP stream, aka the main character of this whole situation ✨
• port — index of MIDI port, like which door we're knocking on 🚪
• midi — the MIDI device to be started, or NULL to stop the current device. yeah, NULL is the "we're done here" signal 🙈

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🎀 DESCRIPTION 🎀

Call this function on a running isochronous stream to enable the actual transmission of MIDI data 🔥 lowkey that's the whole point — if the stream isn't running, this isn't the move, iykyk.

This function should be called from the MIDI device's .trigger callback ⭐ like, that's its home, that's where it belongs, that's its main character energy 👑

fr fr: port is just an index, and passing NULL as midi is the designated way to stop whatever device is currently going — don't overthink it 🍓

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🌈 SEE ALSO 🌈

• Kernel file ./sound/firewire/amdtp-am824.c 📁 (go read the source, bestie, it's giving transparency)
• amdtp_am824_set_parameters(9)
• amdtp_am824_set_pcm_position(9)
• amdtp_am824_set_midi_position(9)
• amdtp_am824_add_pcm_hw_constraints(9)
• amdtp_am824_init(9)

the whole friend group, all accounted for 💜

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and that's the page! 🌸 brought to you by the fine folks over at ./sound/firewire, dated October 2026 — mwah, slay, periodt 🎀✨💅