hi_mpi_ao_enable_chn

Applicability

Function Description

Enables an AO channel.

Prototype

hi_s32 hi_mpi_ao_enable_chn(hi_audio_dev ao_dev, hi_ao_chn ao_chn)

Parameters

Returns

• 0: success
• Other values: failure. For details, see Audio Return Codes.

Restrictions

• Before enabling an AO channel, you must set the attributes of the AO device by calling hi_mpi_ao_set_pub_attr. Otherwise, an error code indicating that the attributes are not set is returned.
• Before enabling an AO channel, you must call hi_mpi_ao_enable to enable the AO device to which the AO channel belongs. Otherwise, the error code is returned, indicating that the AO device is not enabled.
• When the audio-left channel or stereo channel is used for recording, ao_chn must be fixed at 0. When the audio-right channel is used for recording, ao_chn is 1.
• If the AO device is enabled, a code indicating success is returned.

See Also

For the API call sequence, see Obtaining and Playing Audios.