GNU Radio 3.6.4 C++ API
audio_alsa_sink Class Reference

audio sink using ALSAThe sink has N input streams of floats, where N depends on the hardware characteristics of the selected device. More...

#include <audio_alsa_sink.h>

Inheritance diagram for audio_alsa_sink:
audio_sink gr_sync_block gr_block gr_basic_block gr_msg_accepter gruel::msg_accepter

Public Member Functions

 audio_alsa_sink (int sampling_rate, const std::string device_name, bool ok_to_block)
 ~audio_alsa_sink ()
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

bool write_buffer (const 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_1x2 (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_1x2 (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)

Additional Inherited Members

- Public Types inherited from audio_sink
typedef boost::shared_ptr
< audio_sink
sptr
- Protected Types inherited from gr_basic_block
enum  vcolor { WHITE, GREY, BLACK }
- Protected Attributes inherited from gr_block
std::vector< long > d_max_output_buffer
std::vector< long > d_min_output_buffer
gruel::mutex d_setlock

Detailed Description

audio sink using ALSA

The sink has N input streams of floats, where N depends on the hardware characteristics of the selected device.

Input samples must be in the range [-1,1].

Constructor & Destructor Documentation

audio_alsa_sink::audio_alsa_sink ( int  sampling_rate,
const std::string  device_name,
bool  ok_to_block 
)
audio_alsa_sink::~audio_alsa_sink ( )

Member Function Documentation

bool audio_alsa_sink::check_topology ( int  ninputs,
int  noutputs 
)
virtual

Confirm that ninputs and noutputs is an acceptable combination.

Parameters
ninputsnumber of input streams connected
noutputsnumber 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.

int audio_alsa_sink::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_sink::work_s16 ( int  noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
)
protected
int audio_alsa_sink::work_s16_1x2 ( int  noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
)
protected
int audio_alsa_sink::work_s32 ( int  noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
)
protected
int audio_alsa_sink::work_s32_1x2 ( int  noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
)
protected
bool audio_alsa_sink::write_buffer ( const void buffer,
unsigned  nframes,
unsigned  sizeof_frame 
)
protected

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