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/freebsd-11.0-release/sys/dev/sound/pcm/ | ||
H A D | mixer.h | diff 70618 Wed Jan 03 01:29:47 MST 2001 jhb Add a new API for soundcards that have hardware volume control: - The mixer_hwmute() function can be called when a soundcard receives a mute request. - The mixer_hwstep() function can be used to adjust the volume of one or both channels. - The 'hw.snd.hwvol_step' sysctl determines the amount that mixer_hwstep() adjusts the volume by on each call. - The 'hw.snd.hwvol_mixer' sysctl specifies the mixer device to adjust the volume on for both functions. The values used correspond to the SOUNDCARD_MIXER_* constants. |
H A D | mixer.c | diff 70618 Wed Jan 03 01:29:47 MST 2001 jhb Add a new API for soundcards that have hardware volume control: - The mixer_hwmute() function can be called when a soundcard receives a mute request. - The mixer_hwstep() function can be used to adjust the volume of one or both channels. - The 'hw.snd.hwvol_step' sysctl determines the amount that mixer_hwstep() adjusts the volume by on each call. - The 'hw.snd.hwvol_mixer' sysctl specifies the mixer device to adjust the volume on for both functions. The values used correspond to the SOUNDCARD_MIXER_* constants. |
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