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audio_stream Struct Reference
#include <
audio.h
>
Definition at line
170
of file
audio.h
.
dump the state of the audio input/output device
Definition at line
212
of file
audio.h
.
|
size_t(* get_buffer_size)(const struct
audio_stream
*stream)
|
Return size of input/output buffer in bytes for this stream - eg. 4800. It should be a multiple of the frame size. See also get_input_buffer_size.
Definition at line
186
of file
audio.h
.
|
audio_channel_mask_t(* get_channels)(const struct
audio_stream
*stream)
|
Return the channel mask - e.g. AUDIO_CHANNEL_OUT_STEREO or AUDIO_CHANNEL_IN_STEREO
Definition at line
192
of file
audio.h
.
|
audio_devices_t(* get_device)(const struct
audio_stream
*stream)
|
Return the set of device(s) which this stream is connected to
Definition at line
215
of file
audio.h
.
|
audio_format_t(* get_format)(const struct
audio_stream
*stream)
|
Return the audio format - e.g. AUDIO_FORMAT_PCM_16_BIT
Definition at line
197
of file
audio.h
.
|
char*(* get_parameters)(const struct
audio_stream
*stream, const char *keys)
|
|
uint32_t(* get_sample_rate)(const struct
audio_stream
*stream)
|
Return the sampling rate in Hz - eg. 44100.
Definition at line
175
of file
audio.h
.
|
int(* set_device)(struct
audio_stream
*stream, audio_devices_t device)
|
Currently unused -
set_device()
corresponds to
set_parameters()
with key AUDIO_PARAMETER_STREAM_ROUTING for both input and output. AUDIO_PARAMETER_STREAM_INPUT_SOURCE is an additional information used by input streams only.
Definition at line
223
of file
audio.h
.
|
int(* set_format)(struct
audio_stream
*stream, audio_format_t format)
|
|
int(* set_parameters)(struct
audio_stream
*stream, const char *kv_pairs)
|
set/get audio stream parameters. The function accepts a list of parameter key value pairs in the form: key1=value1;key2=value2;...
Some keys are reserved for standard parameters (See AudioParameter class)
If the implementation does not accept a parameter change while the output is active but the parameter is acceptable otherwise, it must return -ENOSYS.
The audio flinger will put the stream in standby and then change the parameter value.
Definition at line
238
of file
audio.h
.
|
int(* set_sample_rate)(struct
audio_stream
*stream, uint32_t rate)
|
Put the audio hardware input/output into standby mode. Driver should exit from standby mode at the next I/O operation. Returns 0 on success and <0 on failure.
Definition at line
209
of file
audio.h
.
The documentation for this struct was generated from the following file:
-
hardware/libhardware/include/hardware/
audio.h
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2019-10-02 UTC.
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