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/* -*- c++ -*- */
/*
* Copyright 2004-2011,2013 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_WINDOWS_SOURCE_H
#define INCLUDED_AUDIO_WINDOWS_SOURCE_H
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX // stops windef.h defining max/min under cygwin
#include <windows.h>
#include <mmsystem.h>
#include <gnuradio/audio/source.h>
#include <string>
#include <boost/lockfree/spsc_queue.hpp>
namespace gr {
namespace audio {
/*!
* \brief audio source using winmm mmsystem (win32 only)
* \ingroup audio_blk
*
* Output signature is one or two streams of floats.
* Output samples will be in the range [-1,1].
*/
class windows_source : public source
{
int d_sampling_freq;
std::string d_device_name;
int d_fd;
LPWAVEHDR *lp_buffers;
DWORD d_chunk_size;
DWORD d_buffer_size;
HWAVEIN d_h_wavein;
WAVEFORMATEX wave_format;
protected:
int string_to_int(const std::string & s);
int open_wavein_device(void);
MMRESULT is_format_supported(LPWAVEFORMATEX pwfx, UINT uDeviceID);
bool is_number(const std::string& s);
UINT find_device(std::string szDeviceName);
boost::lockfree::spsc_queue<LPWAVEHDR> buffer_queue{ 100 };
public:
windows_source(int sampling_freq,
const std::string device_name = "");
~windows_source();
int work(int noutput_items,
gr_vector_const_void_star & input_items,
gr_vector_void_star & output_items);
};
static void CALLBACK read_wavein(
HWAVEIN hwi,
UINT uMsg,
DWORD_PTR dwInstance,
DWORD_PTR dwParam1,
DWORD_PTR dwParam2
);
} /* namespace audio */
} /* namespace gr */
#endif /* INCLUDED_AUDIO_WINDOWS_SOURCE_H */
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