snd_rawmidi_transmit(9)

💜 snd_rawmidi_transmit(9) 💜

okay bestie, this page is straight out of the Kernel API Manual, and it’s giving “copy bytes into the device” realness ✨ no cap. let’s get into it 🎀

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🌸 NAME 🌸

• snd_rawmidi_transmit — copy from the buffer to the device 💫

✨ SYNOPSIS ✨

here’s the whole signature, bestie — keep it exactly like this 🫶

int snd_rawmidi_transmit (struct snd_rawmidi_substream *substream ,
unsigned char *buffer , int count );

🎀 ARGUMENTS 🎀

• substream — the rawmidi substream, the main character we’re working with 👑
• buffer — the buffer pointer, periodt 🫶
• count — the data size to transfer, aka the amount bestie 💅

💖 DESCRIPTION 💖

okay so this one literally copies data from the buffer to the device and advances the pointer. that’s the whole vibe, no cap ✨

🌈 RETURN 🌈

on success you get the copied size — slay 🎉. on failure you get a negative error code 😭. that’s it, fr fr.

🦋 SEE ALSO 🦋

the kernel file is ./sound/core/rawmidi.c, and these besties are also in the group chat 👯‍♀️:

• snd_rawmidi_receive(9)
• snd_rawmidi_transmit_empty(9)
• snd_rawmidi_transmit_peek(9)
• snd_rawmidi_transmit_ack(9)
• snd_rawmidi_proceed(9)
• snd_rawmidi_new(9)
• snd_rawmidi_set_ops(9)

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catch u later, bestie 💖 this page lives under ./sound/core, dated October 2026, and it’s all about snd_rawmidi_transmit(9) 🎀✨