audio_oss_source.h

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/* -*- 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_OSS_SOURCE_H
#define INCLUDED_AUDIO_OSS_SOURCE_H

#include <gr_sync_block.h>
#include <string>


class audio_oss_source;
typedef boost::shared_ptr<audio_oss_source> audio_oss_source_sptr;

audio_oss_source_sptr
audio_oss_make_source (int sampling_rate,
                       const std::string dev = "",
                       bool ok_to_block = true);

/*!
 * \brief audio source using OSS
 *
 * Output signature is one or two streams of floats.
 * Output samples will be in the range [-1,1].
 */

class audio_oss_source : public gr_sync_block {
  friend audio_oss_source_sptr
  audio_oss_make_source (int sampling_rate, const std::string device_name, bool ok_to_block);

  int           d_sampling_rate;
  std::string   d_device_name;
  int           d_fd;
  short        *d_buffer;
  int           d_chunk_size;

 protected:
  audio_oss_source (int sampling_rate,
                    const std::string device_name = "",
                    bool ok_to_block = true);

 public:
  ~audio_oss_source ();
  
  int work (int noutput_items,
            gr_vector_const_void_star &input_items,
            gr_vector_void_star &output_items);
};



#endif /* INCLUDED_AUDIO_OSS_SOURCE_H */