---
name: "snd_pcm_hw_constraint_msbits"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/snd_pcm_hw_constraint_msbits"
---

# snd\_pcm\_hw\_constraint\_msbits(9)

add a hw constraint msbits rule

## NAME

snd\_pcm\_hw\_constraint\_msbits - add a hw constraint msbits rule

## SYNOPSIS

**int snd\_pcm\_hw\_constraint\_msbits(struct snd\_pcm\_runtime \*** *runtime***, unsigned int** *cond***, unsigned int** *width***, unsigned int** *msbits***);**

## ARGUMENTS

*runtime*

PCM runtime instance

*cond*

condition bits

*width*

sample bits width

*msbits*

msbits width

## DESCRIPTION

This constraint will set the number of most significant bits (msbits) if a sample format with the specified width has been select. If width is set to 0 the msbits will be set for any sample format with a width larger than the specified msbits.

## RETURN

Zero if successful, or a negative error code on failure.

## COPYRIGHT