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
|
/*
Copyright (C) 2006 Paul Davis
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.
*/
#include <cassert>
#include <ardour/audio_port.h>
#include <ardour/jack_audio_port.h>
#include <ardour/audioengine.h>
#include <ardour/data_type.h>
using namespace ARDOUR;
using namespace std;
AudioPort::AudioPort (const std::string& name, Flags flags, bool external, nframes_t capacity)
: Port (name, flags)
, BaseAudioPort (name, flags)
, PortFacade (name, flags)
{
if (!external || receives_input()) {
/* internal-only and input ports need their own buffers.
external output ports use the external port buffer.
*/
_buffer = new AudioBuffer (capacity);
_own_buffer = true;
}
if (!external) {
_ext_port = 0;
set_name (name);
} else {
/* make the JackAudioPort create its own buffer. For input,
we will copy from it during cycle_start(). For output,
we will set up our buffer to point to its buffer, which
will in turn be using the JACK port buffer for data.
*/
_ext_port = new JackAudioPort (name, flags, 0);
if (sends_output()) {
_buffer = &dynamic_cast<JackAudioPort*>(_ext_port)->get_audio_buffer();
}
Port::set_name (_ext_port->name());
}
reset ();
}
AudioPort::~AudioPort()
{
if (_ext_port) {
delete _ext_port;
_ext_port = 0;
}
}
void
AudioPort::reset()
{
BaseAudioPort::reset();
if (_ext_port) {
_ext_port->reset ();
}
}
void
AudioPort::cycle_start (nframes_t nframes, nframes_t offset)
{
/* caller must hold process lock */
if (_ext_port) {
_ext_port->cycle_start (nframes, offset);
}
if (_flags & IsInput) {
if (_ext_port) {
_buffer->read_from (dynamic_cast<BaseAudioPort*>(_ext_port)->get_audio_buffer(), nframes, offset);
if (!_connections.empty()) {
(*_mixdown) (_connections, _buffer, nframes, offset, false);
}
} else {
if (_connections.empty()) {
_buffer->silence (nframes, offset);
} else {
(*_mixdown) (_connections, _buffer, nframes, offset, true);
}
}
} else {
// XXX if we could get the output stage to not purely mix into, but also
// to initially overwrite the buffer, we could avoid this silence step.
_buffer->silence (nframes, offset);
}
}
void
AudioPort::cycle_end (nframes_t nframes, nframes_t offset)
{
}
|
