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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
#include <cstring>
#include <vamp-sdk/hostext/PluginLoader.h>
#include <glibmm/miscutils.h>
#include <glibmm/fileutils.h>
#include <glib/gstdio.h> // for g_remove()
#include <pbd/error.h>
#include <ardour/audioanalyser.h>
#include <ardour/readable.h>
#include <ardour/readable.h>
#include "i18n.h"
using namespace std;
using namespace Vamp;
using namespace PBD;
using namespace ARDOUR;
AudioAnalyser::AudioAnalyser (float sr, AnalysisPluginKey key)
: sample_rate (sr)
, plugin_key (key)
{
/* create VAMP plugin and initialize */
if (initialize_plugin (plugin_key, sample_rate)) {
error << string_compose (_("cannot load VAMP plugin \"%1\""), key) << endmsg;
throw failed_constructor();
}
}
AudioAnalyser::~AudioAnalyser ()
{
delete plugin;
}
int
AudioAnalyser::initialize_plugin (AnalysisPluginKey key, float sr)
{
using namespace Vamp::HostExt;
PluginLoader* loader (PluginLoader::getInstance());
plugin = loader->loadPlugin (key, sr, PluginLoader::ADAPT_ALL);
if (!plugin) {
error << string_compose (_("VAMP Plugin \"%1\" could not be loaded"), key) << endmsg;
return -1;
}
/* we asked for the buffering adapter, so set the blocksize to
something that makes for efficient disk i/o
*/
bufsize = 65536;
stepsize = bufsize;
if (plugin->getMinChannelCount() > 1) {
delete plugin;
return -1;
}
if (!plugin->initialise (1, stepsize, bufsize)) {
delete plugin;
return -1;
}
return 0;
}
void
AudioAnalyser::reset ()
{
if (plugin) {
plugin->reset ();
}
}
int
AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
{
ofstream ofile;
Plugin::FeatureSet features;
int ret = -1;
bool done = false;
Sample* data = 0;
nframes64_t len = src->readable_length();
nframes64_t pos = 0;
float* bufs[1] = { 0 };
string tmp_path;
if (!path.empty()) {
/* store data in tmp file, not the real one */
tmp_path = path;
tmp_path += ".tmp";
ofile.open (tmp_path.c_str());
if (!ofile) {
goto out;
}
}
data = new Sample[bufsize];
bufs[0] = data;
while (!done) {
nframes64_t to_read;
/* read from source */
to_read = min ((len - pos), bufsize);
if (src->read (data, pos, to_read, channel) != to_read) {
goto out;
}
/* zero fill buffer if necessary */
if (to_read != bufsize) {
memset (data + to_read, 0, (bufsize - to_read) * sizeof (Sample));
}
features = plugin->process (bufs, RealTime::fromSeconds ((double) pos / sample_rate));
if (use_features (features, (path.empty() ? 0 : &ofile))) {
goto out;
}
pos += min (stepsize, to_read);
if (pos >= len) {
done = true;
}
}
/* finish up VAMP plugin */
features = plugin->getRemainingFeatures ();
if (use_features (features, (path.empty() ? &ofile : 0))) {
goto out;
}
ret = 0;
out:
/* works even if it has not been opened */
ofile.close ();
if (ret) {
g_remove (tmp_path.c_str());
} else if (!path.empty()) {
/* move the data file to the requested path */
g_rename (tmp_path.c_str(), path.c_str());
}
if (data) {
delete [] data;
}
return ret;
}
|
