audio_alsa_source Class Reference
audio source using ALSA
More...
#include <audio_alsa_source.h>
List of all members.
Public Member Functions |
| ~audio_alsa_source () |
bool | check_topology (int ninputs, int noutputs) |
| Confirm that ninputs and noutputs is an acceptable combination.
|
int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
| just like gr_block::general_work, only this arranges to call consume_each for you
|
Protected Member Functions |
| audio_alsa_source (int sampling_rate, const std::string device_name, bool ok_to_block) |
bool | read_buffer (void *buffer, unsigned nframes, unsigned sizeof_frame) |
int | work_s16 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
int | work_s16_2x1 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
int | work_s32 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
int | work_s32_2x1 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
Friends |
audio_alsa_source_sptr | audio_alsa_make_source (int sampling_rate, const std::string device_name, bool ok_to_block) |
| Make an ALSA audio source.
|
Detailed Description
audio source using ALSA
The source has between 1 and N input streams of floats, where N is depends on the hardware characteristics of the selected device.
Output samples will be in the range [-1,1].
Constructor & Destructor Documentation
audio_alsa_source::audio_alsa_source |
( |
int |
sampling_rate, |
|
|
const std::string |
device_name, |
|
|
bool |
ok_to_block | |
|
) |
| | [protected] |
audio_alsa_source::~audio_alsa_source |
( |
|
) |
|
Member Function Documentation
bool audio_alsa_source::check_topology |
( |
int |
ninputs, |
|
|
int |
noutputs | |
|
) |
| | [virtual] |
Confirm that ninputs and noutputs is an acceptable combination.
- Parameters:
-
| ninputs | number of input streams connected |
| noutputs | number of output streams connected |
- Returns:
- true if this is a valid configuration for this block.
This function is called by the runtime system whenever the topology changes. Most classes do not need to override this. This check is in addition to the constraints specified by the input and output gr_io_signatures.
Reimplemented from gr_basic_block.
bool audio_alsa_source::read_buffer |
( |
void * |
buffer, |
|
|
unsigned |
nframes, |
|
|
unsigned |
sizeof_frame | |
|
) |
| | [protected] |
Friends And Related Function Documentation
Make an ALSA audio source.
- Parameters:
-
| sampling_rate | sampling rate |
| device_name | ALSA pcm device name, e.g., "hw:0,0" |
| ok_to_block | (currently ignored) |
The documentation for this class was generated from the following file: