#include <audio_alsa_source.h>
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. |
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].
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 | ( | ) |
bool audio_alsa_source::check_topology | ( | int | ninputs, | |
int | noutputs | |||
) | [virtual] |
Confirm that ninputs and noutputs is an acceptable combination.
Reimplemented from gr_basic_block.
bool audio_alsa_source::read_buffer | ( | void * | buffer, | |
unsigned | nframes, | |||
unsigned | sizeof_frame | |||
) | [protected] |
int audio_alsa_source::work | ( | int | noutput_items, | |
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [virtual] |
just like gr_block::general_work, only this arranges to call consume_each for you
The user must override work to define the signal processing code
Implements gr_sync_block.
int audio_alsa_source::work_s16 | ( | int | noutput_items, | |
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [protected] |
int audio_alsa_source::work_s16_2x1 | ( | int | noutput_items, | |
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [protected] |
int audio_alsa_source::work_s32 | ( | int | noutput_items, | |
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [protected] |
int audio_alsa_source::work_s32_2x1 | ( | int | noutput_items, | |
gr_vector_const_void_star & | input_items, | |||
gr_vector_void_star & | output_items | |||
) | [protected] |
audio_alsa_source_sptr audio_alsa_make_source | ( | int | sampling_rate, | |
const std::string | device_name, | |||
bool | ok_to_block | |||
) | [friend] |
Make an ALSA audio source.
sampling_rate | sampling rate | |
dev | ALSA pcm device name, e.g., "hw:0,0" | |
ok_to_block | (currently ignored) |