BASS_Mixer_ChannelFlags

Modifies and retrieves a source channel's mixer flags.

DWORD BASS_Mixer_ChannelFlags(
    DWORD handle,
    DWORD flags,
    DWORD mask
);

Parameters

handle

The channel handle.

flags

A combination of these flags.

BASS_MIXER_CHAN_BUFFER	Buffer the sample data, for use by BASS_Mixer_ChannelGetData and BASS_Mixer_ChannelGetLevel and BASS_Mixer_ChannelGetLevelEx.
BASS_MIXER_CHAN_DOWNMIX	Apply downmixing when switching BASS_SPEAKER_xxx flags. This is ignored if matrix mixing is not enabled.
BASS_MIXER_CHAN_LIMIT	Limit the mixer processing to the amount of data available from this source. This flag can only be applied to one source per mixer, so it will automatically be removed from any other source of the same mixer.
BASS_MIXER_CHAN_NORAMPIN	Do not ramp-in the start, including after seeking (BASS_Mixer_ChannelSetPosition).
BASS_MIXER_CHAN_PAUSE	Pause processing of the source.
BASS_STREAM_AUTOFREE	Automatically free the source channel when it ends.
BASS_SPEAKER_xxx	Speaker assignment flags. If matrix mixing is enabled, then the matrix will be modified to place the source on the requested speaker(s).

mask

The flags (as above) to modify. Flags that are not included in this are left as they are, so it can be set to 0 in order to just retrieve the current flags. To modify the speaker flags, any of the BASS_SPEAKER_xxx flags can be used in the mask (no need to include all of them).

Return value

If successful, the channel's updated flags are returned, else -1 is returned. Use BASS_ErrorGetCode to get the error code.

Error codes

BASS_ERROR_HANDLE	handle is not a mixer source.
BASS_ERROR_SPEAKER	The mixer does not support the requested speaker(s).

Remarks

This function only deals with the channel's mixer related flags. The channel's standard flags, for example looping (BASS_SAMPLE_LOOP), are unaffected; use BASS_ChannelFlags to modify them.

Example

Disable ramping-in of a channel.

BASS_Mixer_ChannelFlags(channel, BASS_MIXER_CHAN_NORAMPIN, BASS_MIXER_CHAN_NORAMPIN); // set NORAMPIN flag

Enable ramping-in of a channel.