1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/* -*- c++ -*- */
/*
* Copyright 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 2, 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_PORTAUDIO_SOURCE_H
#define INCLUDED_AUDIO_PORTAUDIO_SOURCE_H
#include <gr_sync_block.h>
#include <gr_buffer.h>
#include <omnithread.h>
#include <string>
#include <portaudio.h>
#include <stdexcept>
#include <gri_logger.h>
class audio_portaudio_source;
typedef boost::shared_ptr<audio_portaudio_source> audio_portaudio_source_sptr;
/*!
* \PORTAUDIO audio source.
* \param sampling_rate sampling rate in Hz
* \param dev PORTAUDIO device name, e.g., "pa:"
* \param ok_to_block true if it's ok for us to block
*/
audio_portaudio_source_sptr
audio_portaudio_make_source (int sampling_rate,
const std::string dev = "",
bool ok_to_block = true);
PaStreamCallback portaudio_source_callback;
/*!
* \ Audio source using PORTAUDIO
*
* Input samples must be in the range [-1,1].
*/
class audio_portaudio_source : public gr_sync_block {
friend audio_portaudio_source_sptr
audio_portaudio_make_source (int sampling_rate,
const std::string device_name,
bool ok_to_block);
friend PaStreamCallback portaudio_source_callback;
unsigned int d_sampling_rate;
std::string d_device_name;
bool d_ok_to_block;
bool d_verbose;
unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer
PaStream *d_stream;
PaStreamParameters d_input_parameters;
gr_buffer_sptr d_writer; // buffer used between work and callback
gr_buffer_reader_sptr d_reader;
omni_semaphore d_ringbuffer_ready; // binary semaphore
// random stats
int d_noverruns; // count of overruns
gri_logger_sptr d_log; // handle to non-blocking logging instance
void output_error_msg (const char *msg, int err);
void bail (const char *msg, int err) throw (std::runtime_error);
void create_ringbuffer();
protected:
audio_portaudio_source (int sampling_rate, const std::string device_name,
bool ok_to_block);
public:
~audio_portaudio_source ();
bool check_topology (int ninputs, int noutputs);
int work (int ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */
|
