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4.2.3. Audio Functions

SX16_IOC_SET_AUDIO_VOLUME

ioctl( handle, SX16_IOC_SET_AUDIO_VOLUME, volume);

Parameters

volume

Volume. Must be between 0 and 63.

Return values

None.

Notes

Sets audio volume. Parameter means negative value in dB (0 – maximum volume, 63 – minimum volume).

SX16_IOC_SET_AUDIO_MUTE

ioctl( handle, SX16_IOC_SET_AUDIO_MUTE, mute);

Parameters

mute

Mute. Must be 0 or 1.

Return values

None.

Notes

Sets audio mute (0 – sound is on, 1 – sound is off).

SX16_IOC_SET_AUDIO_FORMAT

ioctl( handle, SX16_IOC_SET_AUDIO_FORMAT, format);

Parameters

format

Audio format number.

Return values

None.

Notes

Sets audio format:

AFMT_MPEG1_LAYER1 MPEG-1 Layer I

AFMT_MPEG1_LAYER2 MPEG-1 Layer II

SX16_IOC_SET_AUDIO_ BITRATE

ioctl( handle, SX16_IOC_SET_AUDIO_ BITRATE, bitrate );

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