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/* -*- c++ -*- */
/*
* Copyright 2004-2011,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#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 <mmsystem.h>
#include <windows.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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