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ao_open_live

declared in "ao/ao.h";

Open a live playback audio device for output.

ao_device* ao_open_live(int driver_id, ao_sample_format *format, ao_option *options);

Parameters

driver_id

The ID number of the driver as returned by either ao_driver_id() or ao_default_driver_id().

format

Pointer to a struct describing the sample format. The caller retains ownership of this structure.

options

A linked list of options to be passed to the driver or NULL if no options are needed. Unsupported options are ignored.

Return Values

non-NULL pointer inicates success. This pointer must be passed in subsequent calls to ao_play() and ao_close().

NULL indicates failure. errno will contain the specific cause of the failure:

• AO_ENODRIVER - No driver corresponds to driver_id.
• AO_ENOTLIVE - This driver is not a live output device.
• AO_EBADOPTION - A valid option key has an invalid value.
• AO_EOPENDEVICE - Cannot open the device (for example, if /dev/dsp cannot be opened for writing).
• AO_EFAIL - Any other cause of failure.

Notes

File output drivers cannot be used with this function. Use ao_open_file() instead.