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Diffstat (limited to 'gr-audio-alsa/src/audio_alsa_source.h')
| -rw-r--r-- | gr-audio-alsa/src/audio_alsa_source.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/gr-audio-alsa/src/audio_alsa_source.h b/gr-audio-alsa/src/audio_alsa_source.h deleted file mode 100644 index db6c45683..000000000 --- a/gr-audio-alsa/src/audio_alsa_source.h +++ /dev/null @@ -1,124 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2004,2006 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 3, or (at your option) - * any later version. - * - * GNU Radio is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU Radio; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, - * Boston, MA 02110-1301, USA. - */ - -#ifndef INCLUDED_AUDIO_ALSA_SOURCE_H -#define INCLUDED_AUDIO_ALSA_SOURCE_H - -// use new ALSA API -#define ALSA_PCM_NEW_HW_PARAMS_API -#define ALSA_PCM_NEW_SW_PARAMS_API - -#include <gr_sync_block.h> -#include <string> -#include <alsa/asoundlib.h> -#include <stdexcept> - -class audio_alsa_source; -typedef boost::shared_ptr<audio_alsa_source> audio_alsa_source_sptr; - -/*! - * \brief Make an ALSA audio source. - * - * \param sampling_rate sampling rate - * \param device_name ALSA pcm device name, e.g., "hw:0,0" - * \param ok_to_block (currently ignored) - */ -audio_alsa_source_sptr -audio_alsa_make_source (int sampling_rate, - const std::string device_name = "", - bool ok_to_block = true); - -/*! - * \brief 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]. - */ -class audio_alsa_source : public gr_sync_block { - friend audio_alsa_source_sptr - audio_alsa_make_source (int sampling_rate, - const std::string device_name, - bool ok_to_block); - - // 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); - - protected: - audio_alsa_source (int sampling_rate, const std::string device_name, - bool ok_to_block); - - public: - ~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); -}; - -#endif /* INCLUDED_AUDIO_ALSA_SOURCE_H */ |