hi_mpi_ao_enable_chn
Applicability
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Supported |
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Description
Enables an AO channel.
Prototype
hi_s32 hi_mpi_ao_enable_chn(hi_audio_dev ao_dev, hi_ao_chn ao_chn)
Parameters
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Parameter |
Input/Output |
Description |
|---|---|---|
|
ao_dev |
Input |
Audio device ID. The value range is [0, 4]. |
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ao_chn |
Input |
AO channel ID. |
Returns
- 0: success
- Other values: failure. For details, see Audio Return Codes.
Restrictions
- Before enabling an AO channel, configure the attributes of the AO device by calling hi_mpi_ao_set_pub_attr. Otherwise, an error code is returned, indicating that the attributes are not configured.
- Before enabling an AO channel, enable the AO device to which the AO channel belongs by calling hi_mpi_ao_enable. Otherwise, an error code is returned, indicating that the AO device is not started.
- 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.
Parent topic: AI/AO