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
167
168
169
170
171
172
173
174
175
176
|
#include <math.h>
#include "artsflow.h"
#include "stdsynthmodule.h"
#include "gst_artsio.h"
#include "convert.h"
#include "connect.h"
#include "flowsystem.h"
#include <gst/gst.h>
using namespace Arts;
namespace Gst {
class ArtsStereoSink_impl : virtual public ArtsStereoSink_skel,
virtual public StdSynthModule
{
GstPad *sinkpad;
GstPad *srcpad;
unsigned long remainingsamples;
GstData *inbuf;
unsigned char *dataptr;
public:
ArtsStereoSink_impl()
{
remainingsamples = 0;
inbuf = NULL;
dataptr = NULL;
}
void calculateBlock (unsigned long samples)
{
unsigned long fulfilled = 0;
//gint16 *s;
//fprintf(stderr,"StereoSink: getting %d samples\n",samples);
while (fulfilled < samples) {
if (remainingsamples == 0) {
//fprintf(stderr,"need to get a buffer\n");
if (inbuf) {
gst_data_unref(inbuf);
inbuf = NULL;
}
// start by pulling a buffer from GStreamer
inbuf = gst_pad_pull (sinkpad);
while (GST_IS_EVENT (inbuf)) {
switch (GST_EVENT_TYPE (inbuf)) {
case GST_EVENT_EOS:
gst_element_set_eos (GST_PAD_PARENT (sinkpad));
default:
break;
}
gst_pad_event_default (srcpad, GST_EVENT(inbuf));
inbuf = gst_pad_pull (sinkpad);
}
dataptr = GST_BUFFER_DATA(GST_BUFFER(inbuf));
remainingsamples = GST_BUFFER_SIZE(GST_BUFFER(inbuf)) / 4;
//fprintf(stderr,"got a buffer with %d samples\n",remainingsamples);
}
unsigned long count = MIN(remainingsamples,samples-fulfilled);
//fprintf(stderr,"have %d samples left, can fill %d\n",remainingsamples,count);
convert_stereo_i16le_2float(count,dataptr,outleft,outright);
//s = (gint16 *)dataptr;
//fprintf(stderr,"samples in are %d and %d, out are %f and %f\n",s[0],s[1],outleft[0],outright[0]);
remainingsamples -= count;
dataptr += 4 * count;
fulfilled += count;
}
}
void setPad(GstPad *pad)
{
sinkpad = pad;
}
void setSrcPad(GstPad *pad)
{
srcpad = pad;
}
};
class ArtsStereoSrc_impl : virtual public ArtsStereoSrc_skel,
virtual public StdSynthModule
{
GstPad *srcpad;
GstBuffer *outbuf;
unsigned char *dataptr;
public:
void calculateBlock (unsigned long samples)
{
//gint16 *s;
//fprintf(stderr,"StereoSrc: handed %d samples\n",samples);
outbuf = gst_buffer_new();
GST_BUFFER_DATA(outbuf) = (guchar *)g_malloc(samples*4);
GST_BUFFER_SIZE(outbuf) = samples*4;
memset(GST_BUFFER_DATA(outbuf),0,samples*4);
convert_stereo_2float_i16le(samples,inleft,inright,GST_BUFFER_DATA(outbuf));
//s = (gint16 *)GST_BUFFER_DATA(outbuf);
//fprintf(stderr,"samples in are %f and %f, out are %d and %d\n",inleft[0],inright[0],s[0],s[1]);
gst_pad_push(srcpad,GST_DATA(outbuf));
outbuf = NULL;
}
void setPad(GstPad *pad)
{
srcpad = pad;
}
};
class GstArtsWrapper {
Dispatcher *dispatcher;
ArtsStereoSink sink;
ArtsStereoSrc source;
StereoVolumeControl effect;
public:
GstArtsWrapper(GstPad *sinkpad, GstPad *sourcepad) {
dispatcher = new Arts::Dispatcher();
ArtsStereoSink_impl *sink_impl = new ArtsStereoSink_impl();
ArtsStereoSrc_impl *source_impl = new ArtsStereoSrc_impl();
sink_impl->setPad(sinkpad);
sink_impl->setSrcPad(sourcepad);
source_impl->setPad(sourcepad);
sink = ArtsStereoSink::_from_base(sink_impl);
source = ArtsStereoSrc::_from_base(source_impl);
sink.start();
effect.start();
source.start();
effect.scaleFactor(0.5);
connect(sink, effect);
connect(effect, source);
// connect(sink,source);
}
void iterate()
{
source._node()->requireFlow();
}
};
};
extern "C" {
void *gst_arts_wrapper_new(GstPad *sinkpad, GstPad *sourcepad)
{
return new Gst::GstArtsWrapper(sinkpad, sourcepad);
}
void gst_arts_wrapper_free(void *wrapper)
{
Gst::GstArtsWrapper *w = (Gst::GstArtsWrapper *)wrapper;
delete w;
}
void gst_arts_wrapper_do(void *wrapper)
{
Gst::GstArtsWrapper *w = (Gst::GstArtsWrapper *)wrapper;
w->iterate();
}
}
// vim:sts=2:sw=2
|
