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Diffstat (limited to 'gr-audio-alsa/src/audio_alsa_sink.h')
| -rw-r--r-- | gr-audio-alsa/src/audio_alsa_sink.h | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/gr-audio-alsa/src/audio_alsa_sink.h b/gr-audio-alsa/src/audio_alsa_sink.h deleted file mode 100644 index f3007f60f..000000000 --- a/gr-audio-alsa/src/audio_alsa_sink.h +++ /dev/null @@ -1,125 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2004 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_SINK_H -#define INCLUDED_AUDIO_ALSA_SINK_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_sink; -typedef boost::shared_ptr<audio_alsa_sink> audio_alsa_sink_sptr; - -/*! - * \brief make an alsa audio sink. - * - * \param sampling_rate sampling rate in Hz - * \param device_name ALSA pcm device name, e.g., "hw:0,0" - * \param ok_to_block (currently ignored) - */ -audio_alsa_sink_sptr -audio_alsa_make_sink (int sampling_rate, - const std::string device_name = "", - bool ok_to_block = true); - -/*! - * \brief 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]. - */ -class audio_alsa_sink : public gr_sync_block { - friend audio_alsa_sink_sptr - audio_alsa_make_sink (int sampling_rate, const std::string device_name, - bool ok_to_block); - - // typedef for pointer to class work method - typedef int (audio_alsa_sink::*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 - bool d_special_case_mono_to_stereo; - - // random stats - int d_nunderuns; // count of underruns - int d_nsuspends; // count of suspends - bool d_ok_to_block; // defaults to "true", controls blocking/non-block I/O - - void output_error_msg (const char *msg, int err); - void bail (const char *msg, int err) throw (std::runtime_error); - - protected: - audio_alsa_sink (int sampling_rate, const std::string device_name, - bool ok_to_block); - - public: - ~audio_alsa_sink (); - - 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 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); -}; - -#endif /* INCLUDED_AUDIO_ALSA_SINK_H */ |