Jack2: JackMidiDriver.cpp Source File

Jack2 1.9.12

JackMidiDriver.cpp
1 /*
2 Copyright (C) 2009 Grame.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 (at your option) any later version.
11
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 */
19
20 #include "JackSystemDeps.h"
21 #include "JackMidiDriver.h"
22 #include "JackTime.h"
23 #include "JackError.h"
24 #include "JackEngineControl.h"
25 #include "JackPort.h"
26 #include "JackGraphManager.h"
27 #include "JackException.h"
28 #include <assert.h>
29
30 using namespace std;
31
32 namespace Jack
33 {
34
35 JackMidiDriver::JackMidiDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
36 : JackDriver(name, alias, engine, table)
37 {}
38
39 JackMidiDriver::~JackMidiDriver()
40 {}
41
42 int JackMidiDriver::Open(bool capturing,
43 bool playing,
44 int inchannels,
45 int outchannels,
46 bool monitor,
47 const char* capture_driver_name,
48 const char* playback_driver_name,
49 jack_nframes_t capture_latency,
50 jack_nframes_t playback_latency)
51 {
52 fCaptureChannels = inchannels;
53 fPlaybackChannels = outchannels;
54 return JackDriver::Open(0, 0, capturing, playing, inchannels, outchannels, monitor, capture_driver_name, playback_driver_name, capture_latency, playback_latency);
55 }
56
57 int JackMidiDriver::Attach()
58 {
59 JackPort* port;
60 jack_port_id_t port_index;
61 char name[REAL_JACK_PORT_NAME_SIZE+1];
62 char alias[REAL_JACK_PORT_NAME_SIZE+1];
63 int i;
64
65 jack_log("JackMidiDriver::Attach fBufferSize = %ld fSampleRate = %ld", fEngineControl->fBufferSize, fEngineControl->fSampleRate);
66
67 for (i = 0; i < fCaptureChannels; i++) {
68 snprintf(alias, sizeof(alias), "%s:%s:out%d", fAliasName, fCaptureDriverName, i + 1);
69 snprintf(name, sizeof(name), "%s:capture_%d", fClientControl.fName, i + 1);
70 if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, CaptureDriverFlags, fEngineControl->fBufferSize, &port_index) < 0) {
71 jack_error("driver: cannot register port for %s", name);
72 return -1;
73 }
74 port = fGraphManager->GetPort(port_index);
75 port->SetAlias(alias);
76 fCapturePortList[i] = port_index;
77 jack_log("JackMidiDriver::Attach fCapturePortList[i] port_index = %ld", port_index);
78 }
79
80 for (i = 0; i < fPlaybackChannels; i++) {
81 snprintf(alias, sizeof(alias), "%s:%s:in%d", fAliasName, fPlaybackDriverName, i + 1);
82 snprintf(name, sizeof(name), "%s:playback_%d", fClientControl.fName, i + 1);
83 if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, PlaybackDriverFlags, fEngineControl->fBufferSize, &port_index) < 0) {
84 jack_error("driver: cannot register port for %s", name);
85 return -1;
86 }
87 port = fGraphManager->GetPort(port_index);
88 port->SetAlias(alias);
89 fPlaybackPortList[i] = port_index;
90 jack_log("JackMidiDriver::Attach fPlaybackPortList[i] port_index = %ld", port_index);
91 }
92
93 UpdateLatencies();
94 return 0;
95 }
96
97 int JackMidiDriver::Detach()
98 {
99 int i;
100 jack_log("JackMidiDriver::Detach");
101
102 for (i = 0; i < fCaptureChannels; i++) {
103 fEngine->PortUnRegister(fClientControl.fRefNum, fCapturePortList[i]);
104 }
105
106 for (i = 0; i < fPlaybackChannels; i++) {
107 fEngine->PortUnRegister(fClientControl.fRefNum, fPlaybackPortList[i]);
108 }
109
110 return 0;
111 }
112
113 void JackMidiDriver::UpdateLatencies()
114 {
115 jack_latency_range_t range;
116
117 for (int i = 0; i < fCaptureChannels; i++) {
118 range.max = range.min = fEngineControl->fBufferSize;
119 fGraphManager->GetPort(fCapturePortList[i])->SetLatencyRange(JackCaptureLatency, &range);
120 }
121
122 for (int i = 0; i < fPlaybackChannels; i++) {
123 if (! fEngineControl->fSyncMode) {
124 range.max = range.min = fEngineControl->fBufferSize * 2;
125 }
126 fGraphManager->GetPort(fPlaybackPortList[i])->SetLatencyRange(JackPlaybackLatency, &range);
127 }
128 }
129
130 int JackMidiDriver::SetBufferSize(jack_nframes_t buffer_size)
131 {
132 UpdateLatencies();
133 return 0;
134 }
135
136 int JackMidiDriver::ProcessReadSync()
137 {
138 int res = 0;
139
140 // Read input buffers for the current cycle
141 if (Read() < 0) {
142 jack_error("JackMidiDriver::ProcessReadSync: read error");
143 res = -1;
144 }
145
146 if (ResumeRefNum() < 0) {
147 jack_error("JackMidiDriver::ProcessReadSync: ResumeRefNum error");
148 res = -1;
149 }
150
151 return res;
152 }
153
154 int JackMidiDriver::ProcessWriteSync()
155 {
156 int res = 0;
157
158 if (SuspendRefNum() < 0) {
159 jack_error("JackMidiDriver::ProcessWriteSync: SuspendRefNum error");
160 res = -1;
161 }
162
163 // Write output buffers from the current cycle
164 if (Write() < 0) {
165 jack_error("JackMidiDriver::ProcessWriteSync: write error");
166 res = -1;
167 }
168
169 return res;
170 }
171
172 int JackMidiDriver::ProcessReadAsync()
173 {
174 int res = 0;
175
176 // Read input buffers for the current cycle
177 if (Read() < 0) {
178 jack_error("JackMidiDriver::ProcessReadAsync: read error");
179 res = -1;
180 }
181
182 // Write output buffers from the previous cycle
183 if (Write() < 0) {
184 jack_error("JackMidiDriver::ProcessReadAsync: write error");
185 res = -1;
186 }
187
188 if (ResumeRefNum() < 0) {
189 jack_error("JackMidiDriver::ProcessReadAsync: ResumeRefNum error");
190 res = -1;
191 }
192
193 return res;
194 }
195
196 int JackMidiDriver::ProcessWriteAsync()
197 {
198 return 0;
199 }
200
201 JackMidiBuffer* JackMidiDriver::GetInputBuffer(int port_index)
202 {
203 assert(fCapturePortList[port_index]);
204 return (JackMidiBuffer*)fGraphManager->GetBuffer(fCapturePortList[port_index], fEngineControl->fBufferSize);
205 }
206
207 JackMidiBuffer* JackMidiDriver::GetOutputBuffer(int port_index)
208 {
209 assert(fPlaybackPortList[port_index]);
210 return (JackMidiBuffer*)fGraphManager->GetBuffer(fPlaybackPortList[port_index], fEngineControl->fBufferSize);
211 }
212
213 } // end of namespace
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
_jack_latency_range::min
jack_nframes_t min
Definition: types.h:270
_jack_latency_range
Definition: types.h:265
_jack_latency_range::max
jack_nframes_t max
Definition: types.h:274
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108