pjmedia_aud_param Struct Reference
[Audio Device API Reference]

Data Fields
pjmedia_dir	dir
pjmedia_aud_dev_index	rec_id
pjmedia_aud_dev_index	play_id
unsigned	clock_rate
unsigned	channel_count
unsigned	samples_per_frame
unsigned	bits_per_sample
unsigned	flags
pjmedia_format	ext_fmt
unsigned	input_latency_ms
unsigned	output_latency_ms
unsigned	input_vol
unsigned	output_vol
pjmedia_aud_dev_route	input_route
pjmedia_aud_dev_route	output_route
pj_bool_t	ec_enabled
unsigned	ec_tail_ms
pj_bool_t	plc_enabled
pj_bool_t	cng_enabled

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Detailed Description

This structure specifies the parameters to open the audio stream.

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Field Documentation

pjmedia_dir pjmedia_aud_param::dir

The audio direction. This setting is mandatory.

pjmedia_aud_dev_index pjmedia_aud_param::rec_id

The audio recorder device ID. This setting is mandatory if the audio direction includes input/capture direction.

pjmedia_aud_dev_index pjmedia_aud_param::play_id

The audio playback device ID. This setting is mandatory if the audio direction includes output/playback direction.

unsigned pjmedia_aud_param::clock_rate

Clock rate/sampling rate. This setting is mandatory.

unsigned pjmedia_aud_param::channel_count

Number of channels. This setting is mandatory.

unsigned pjmedia_aud_param::samples_per_frame

Number of samples per frame. This setting is mandatory.

unsigned pjmedia_aud_param::bits_per_sample

Number of bits per sample. This setting is mandatory.

unsigned pjmedia_aud_param::flags

This flags specifies which of the optional settings are valid in this structure. The flags is bitmask combination of pjmedia_aud_dev_cap.

pjmedia_format pjmedia_aud_param::ext_fmt

Set the audio format. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_EXT_FORMAT is set in the flags.

unsigned pjmedia_aud_param::input_latency_ms

Input latency, in milliseconds. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_INPUT_LATENCY is set in the flags.

unsigned pjmedia_aud_param::output_latency_ms

Input latency, in milliseconds. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_OUTPUT_LATENCY is set in the flags.

unsigned pjmedia_aud_param::input_vol

Input volume setting, in percent. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_INPUT_VOLUME_SETTING is set in the flags.

unsigned pjmedia_aud_param::output_vol

Output volume setting, in percent. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_OUTPUT_VOLUME_SETTING is set in the flags.

pjmedia_aud_dev_route pjmedia_aud_param::input_route

Set the audio input route. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_INPUT_ROUTE is set in the flags.

pjmedia_aud_dev_route pjmedia_aud_param::output_route

Set the audio output route. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_OUTPUT_ROUTE is set in the flags.

pj_bool_t pjmedia_aud_param::ec_enabled

Enable/disable echo canceller, if the device supports it. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_EC is set in the flags.

unsigned pjmedia_aud_param::ec_tail_ms

Set echo canceller tail length in milliseconds, if the device supports it. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_EC_TAIL is set in the flags.

pj_bool_t pjmedia_aud_param::plc_enabled

Enable/disable PLC. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_PLC is set in the flags.

pj_bool_t pjmedia_aud_param::cng_enabled

Enable/disable CNG. This setting is optional, and will only be used if PJMEDIA_AUD_DEV_CAP_CNG is set in the flags.

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The documentation for this struct was generated from the following file:

• audiodev.h