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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
silence.cpp - LV2 Toolkit API Demonstration Plugin
Copyright (C) 2012 Michael Fisher <mfisher31@gmail.com>
This program 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 of
the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
@file silence.cpp
Demonstrates LV2 URID mapping, Log, and State Save/Restore
*/
#include <iostream>
#include <vector>
#include <cstdlib>
#include <lvtk/plugin.hpp>
#include "silence.h"
using namespace lvtk;
using std::vector;
#define LVTK_SILENCE_URI "http://lvtoolkit.org/plugins/silence"
#define LVTK_SILENCE_PREFIX LVTK_SILENCE_URI "#"
#define LVTK_SILENCE_MSG LVTK_SILENCE_PREFIX "msg"
class Silence : public Plugin<Silence, URID<true>, State<true> >
{
public:
Silence (double rate)
: Plugin<Silence, URID<true>, State<true> > (1)
{
urids.atom_String = map (LV2_ATOM__String);
urids.silence_msg = map (LVTK_SILENCE_MSG);
urids.midi_type = map (LV2_MIDI__MidiEvent);
}
void
run(uint32_t nframes)
{
float *out = p(0);
check_midi();
for (int i = 0; i < nframes; i++)
{
out[i] = 0.0f;
}
}
StateStatus
save (StateStore &store, uint32_t flags, const FeatureVec &features)
{
const char* msg = "Sorry I can't hear you. Please speak up";
return store (urids.silence_msg, (void*)msg,
strlen(msg), urids.atom_String,
STATE_IS_POD | STATE_IS_PORTABLE);
}
StateStatus
restore (StateRetrieve &retrieve, uint32_t flags, const FeatureVec &features)
{
size_t size;
uint32_t type,fs;
const void *message = retrieve (urids.silence_msg, &size, &type, &fs);
if (message)
{
std::cout << "[silence] " << (char*)message << std::endl;
return STATE_SUCCESS;
}
return STATE_ERR_UNKNOWN;
}
private:
void
check_midi ()
{
const LV2_Atom_Sequence* midiseq = p<LV2_Atom_Sequence> (p_midi);
LV2_ATOM_SEQUENCE_FOREACH(midiseq, ev)
{
uint32_t frame_offset = ev->time.frames;
if (ev->body.type == urids.midi_type)
{
std::cout << "MIDI\n";
}
}
}
struct SilenceURIs {
LV2_URID atom_String;
LV2_URID silence_msg;
LV2_URID midi_type;
} urids;
};
static int _ = Silence::register_class (LVTK_SILENCE_URI);
|
