GNU Radio 3.6.3.1 C++ API
audio_windows_sink.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004-2011 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef INCLUDED_AUDIO_WINDOWS_SINK_H
24 #define INCLUDED_AUDIO_WINDOWS_SINK_H
25 
26 #define WIN32_LEAN_AND_MEAN
27 #define NOMINMAX // stops windef.h defining max/min under cygwin
28 
29 #include <windows.h>
30 #include <mmsystem.h>
31 
32 #include <gr_audio_sink.h>
33 #include <string>
34 
35 /*!
36  * \brief audio sink using winmm mmsystem (win32 only)
37  * \ingroup audio_blk
38  *
39  * input signature is one or two streams of floats.
40  * Input samples must be in the range [-1,1].
41  */
42 
44 {
45  int d_sampling_freq;
46  std::string d_device_name;
47  int d_fd;
48  short *d_buffer;
49  int d_chunk_size;
50  HWAVEOUT d_h_waveout;
51  HGLOBAL d_h_wave_hdr;
52  LPWAVEHDR d_lp_wave_hdr;
53  HANDLE d_wave_write_event;
54 
55 protected:
56  int
57  string_to_int (const std::string & s);
58  int
59  open_waveout_device (void);
60  int
61  write_waveout (HPSTR lp_data, DWORD dw_data_size);
62 
63 public:
64  audio_windows_sink (int sampling_freq, const std::string device_name = "");
66 
67  int
68  work (int noutput_items,
69  gr_vector_const_void_star & input_items,
70  gr_vector_void_star & output_items);
71 };
72 
73 #endif /* INCLUDED_AUDIO_WINDOWS_SINK_H */