diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2013-02-11 21:20:27 -0500 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2013-02-11 21:20:27 -0500 |
| commit | 354c1219a22e13422b14d9bc14645e1296776d24 (patch) | |
| tree | e432361a66c5ecb8c6fd47c16e2f96722690f0c4 /gr-audio/lib/alsa/audio_alsa_source.h | |
| parent | d28b2f2bdd4a2961bb29076085a129299aeec157 (diff) | |
audio: wip: conversion cont. Alsa building.
Diffstat (limited to 'gr-audio/lib/alsa/audio_alsa_source.h')
| -rw-r--r-- | gr-audio/lib/alsa/audio_alsa_source.h | 151 |
1 files changed, 79 insertions, 72 deletions
diff --git a/gr-audio/lib/alsa/audio_alsa_source.h b/gr-audio/lib/alsa/audio_alsa_source.h index fd33fd89ad..6314fc1376 100644 --- a/gr-audio/lib/alsa/audio_alsa_source.h +++ b/gr-audio/lib/alsa/audio_alsa_source.h @@ -28,80 +28,87 @@ #define ALSA_PCM_NEW_SW_PARAMS_API #include <audio/source.h> -#include <string> #include <alsa/asoundlib.h> +#include <string> #include <stdexcept> -class audio_alsa_source; -typedef boost::shared_ptr<audio_alsa_source> audio_alsa_source_sptr; - -/*! - * \brief audio source using ALSA - * \ingroup audio_blk - * - * 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]. - */ -class audio_alsa_source : public audio_source { - // typedef for pointer to class work method - typedef int (audio_alsa_source::*work_t)(int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items); - - unsigned int d_sampling_rate; - std::string d_device_name; - snd_pcm_t *d_pcm_handle; - snd_pcm_hw_params_t *d_hw_params; - snd_pcm_sw_params_t *d_sw_params; - snd_pcm_format_t d_format; - unsigned int d_nperiods; - unsigned int d_period_time_us; // microseconds - snd_pcm_uframes_t d_period_size; // in frames - unsigned int d_buffer_size_bytes; // sizeof of d_buffer - char *d_buffer; - work_t d_worker; // the work method to use - unsigned int d_hw_nchan; // # of configured h/w channels - bool d_special_case_stereo_to_mono; - - // random stats - int d_noverruns; // count of overruns - int d_nsuspends; // count of suspends - - void output_error_msg (const char *msg, int err); - void bail (const char *msg, int err) throw (std::runtime_error); - -public: - audio_alsa_source (int sampling_rate, const std::string device_name, - bool ok_to_block); - - ~audio_alsa_source (); - - bool check_topology (int ninputs, int noutputs); - - int work (int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items); - -protected: - 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); -}; +namespace gr { + namespace audio { + + class alsa_source; + typedef boost::shared_ptr<alsa_source> alsa_source_sptr; + + /*! + * \brief audio source using ALSA + * \ingroup audio_blk + * + * 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]. + */ + class alsa_source : public source + { + // typedef for pointer to class work method + typedef int(alsa_source::*work_t)(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + unsigned int d_sampling_rate; + std::string d_device_name; + snd_pcm_t *d_pcm_handle; + snd_pcm_hw_params_t *d_hw_params; + snd_pcm_sw_params_t *d_sw_params; + snd_pcm_format_t d_format; + unsigned int d_nperiods; + unsigned int d_period_time_us; // microseconds + snd_pcm_uframes_t d_period_size; // in frames + unsigned int d_buffer_size_bytes; // sizeof of d_buffer + char *d_buffer; + work_t d_worker; // the work method to use + unsigned int d_hw_nchan; // # of configured h/w channels + bool d_special_case_stereo_to_mono; + + // random stats + int d_noverruns; // count of overruns + int d_nsuspends; // count of suspends + + void output_error_msg(const char *msg, int err); + void bail(const char *msg, int err) throw (std::runtime_error); + + public: + alsa_source(int sampling_rate, + const std::string device_name, + bool ok_to_block); + ~alsa_source(); + + bool check_topology(int ninputs, int noutputs); + + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + protected: + 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); + }; + + } /* namespace audio */ +} /* namespace gr */ #endif /* INCLUDED_AUDIO_ALSA_SOURCE_H */ |