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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_SINK_H
#define INCLUDED_AUDIO_WINDOWS_SINK_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/sink.h>
#include <gnuradio/logger.h>
#include <string>
namespace gr {
namespace audio {
/*!
* \brief audio sink using winmm mmsystem (win32 only)
* \ingroup audio_blk
*
* input signature is one or two streams of floats.
* Input samples must be in the range [-1,1].
*/
class windows_sink : public sink
{
int d_sampling_freq;
std::string d_device_name;
int d_fd;
LPWAVEHDR* d_buffers;
DWORD d_chunk_size;
DWORD d_buffer_size;
bool d_ok_to_block;
HWAVEOUT d_h_waveout;
HANDLE d_wave_write_event;
WAVEFORMATEX wave_format;
protected:
int string_to_int(const std::string& s);
int open_waveout_device(void);
int write_waveout(LPWAVEHDR lp_wave_hdr);
MMRESULT is_format_supported(LPWAVEFORMATEX pwfx, UINT uDeviceID);
bool is_number(const std::string& s);
UINT find_device(std::string szDeviceName);
public:
windows_sink(int sampling_freq, const std::string device_name, bool ok_to_block);
~windows_sink();
int work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items);
};
} /* namespace audio */
} /* namespace gr */
#endif /* INCLUDED_AUDIO_WINDOWS_SINK_H */
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