/[svn]/linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceJack.cpp
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Annotation of /linuxsampler/trunk/src/drivers/audio/AudioOutputDeviceJack.cpp

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Revision 403 - (hide annotations) (download)
Tue Feb 22 20:37:59 2005 UTC (19 years, 1 month ago) by schoenebeck
File size: 10876 byte(s)
* JACK driver: fixed channel parameter 'JACK_BINDINGS' which did not work
  for a multi JACK device setup

1 schoenebeck 200 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5     * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6     * *
7     * This program is free software; you can redistribute it and/or modify *
8     * it under the terms of the GNU General Public License as published by *
9     * the Free Software Foundation; either version 2 of the License, or *
10     * (at your option) any later version. *
11     * *
12     * This program is distributed in the hope that it will be useful, *
13     * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15     * GNU General Public License for more details. *
16     * *
17     * You should have received a copy of the GNU General Public License *
18     * along with this program; if not, write to the Free Software *
19     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20     * MA 02111-1307 USA *
21     ***************************************************************************/
22    
23     #include "AudioOutputDeviceJack.h"
24     #include "AudioOutputDeviceFactory.h"
25    
26 capela 268 #include <errno.h>
27    
28 schoenebeck 200 #if HAVE_JACK
29    
30 persson 379 #ifndef HAVE_JACK_CLIENT_NAME_SIZE
31     #define jack_client_name_size() 33
32     #endif
33    
34 schoenebeck 200 namespace LinuxSampler {
35    
36 schoenebeck 374 /// number of currently existing JACK audio output devices in LinuxSampler
37     static int existingJackDevices = 0;
38    
39     // *************** AudioChannelJack::ParameterName ***************
40 schoenebeck 226 // *
41    
42     AudioOutputDeviceJack::AudioChannelJack::ParameterName::ParameterName(AudioChannelJack* pChannel) : AudioChannel::ParameterName(ToString(pChannel->ChannelNr)) {
43     this->pChannel = pChannel;
44     }
45    
46     void AudioOutputDeviceJack::AudioChannelJack::ParameterName::OnSetValue(String s) {
47 schoenebeck 227 if (jack_port_set_name(pChannel->hJackPort, s.c_str())) throw AudioOutputException("Failed to rename JACK port");
48 schoenebeck 226 }
49    
50    
51    
52 schoenebeck 374 // *************** AudioChannelJack::ParameterJackBindings ***************
53 schoenebeck 226 // *
54    
55     AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::ParameterJackBindings(AudioChannelJack* pChannel) : DeviceRuntimeParameterStrings(std::vector<String>()) {
56     this->pChannel = pChannel;
57     }
58    
59     String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Description() {
60     return "Bindings to other JACK clients";
61     }
62    
63     bool AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Fix() {
64     return false;
65     }
66    
67     std::vector<String> AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::PossibilitiesAsString() {
68 schoenebeck 227 const char** pPortNames = jack_get_ports(pChannel->pDevice->hJackClient, NULL, NULL, JackPortIsInput);
69 schoenebeck 226 if (!pPortNames) return std::vector<String>();
70     std::vector<String> result;
71     for (int i = 0; pPortNames[i]; i++) result.push_back(pPortNames[i]);
72     //free(pPortNames); FIXME: pPortNames should be freed here
73     return result;
74     }
75    
76     void AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::OnSetValue(std::vector<String> vS) {
77 schoenebeck 227 // TODO: we should remove all existing bindings before we connect new ones here
78 schoenebeck 403 String src_name = ((DeviceCreationParameterString*)pChannel->pDevice->Parameters["NAME"])->ValueAsString() + ":" +
79     ((DeviceRuntimeParameterString*)pChannel->Parameters["NAME"])->ValueAsString();
80 schoenebeck 226 for (int i = 0; i < vS.size(); i++) {
81     String dst_name = vS[i];
82 schoenebeck 227 int res = jack_connect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str());
83     if (res == EEXIST) throw AudioOutputException("Jack: Connection to port '" + dst_name + "' already established");
84     else if (res) throw AudioOutputException("Jack: Cannot connect port '" + src_name + "' to port '" + dst_name + "'");
85 schoenebeck 226 }
86     }
87    
88     String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Name() {
89     return "JACK_BINDINGS";
90     }
91    
92    
93    
94     // *************** AudioChannelJack ***************
95     // *
96    
97     AudioOutputDeviceJack::AudioChannelJack::AudioChannelJack(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) : AudioChannel(ChannelNr, CreateJackPort(ChannelNr, pDevice), pDevice->uiMaxSamplesPerCycle) {
98     this->pDevice = pDevice;
99     this->ChannelNr = ChannelNr;
100     Parameters["NAME"] = new ParameterName(this);
101     Parameters["JACK_BINDINGS"] = new ParameterJackBindings(this);
102     }
103    
104     AudioOutputDeviceJack::AudioChannelJack::~AudioChannelJack() {
105     //TODO: delete JACK port
106     }
107    
108     float* AudioOutputDeviceJack::AudioChannelJack::CreateJackPort(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) {
109 schoenebeck 227 String port_id = ToString(ChannelNr);
110 schoenebeck 226 hJackPort = jack_port_register(pDevice->hJackClient, port_id.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
111     if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");
112     return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);
113     }
114    
115    
116    
117 schoenebeck 374 // *************** AudioOutputDeviceJack::ParameterName ***************
118     // *
119    
120     AudioOutputDeviceJack::ParameterName::ParameterName() : DeviceCreationParameterString() {
121     InitWithDefault(); // use default name
122     }
123    
124     AudioOutputDeviceJack::ParameterName::ParameterName(String s) throw (LinuxSamplerException) : DeviceCreationParameterString(s) {
125     }
126    
127     String AudioOutputDeviceJack::ParameterName::Description() {
128     return "Arbitrary JACK client name";
129     }
130    
131     bool AudioOutputDeviceJack::ParameterName::Fix() {
132     return true;
133     }
134    
135     bool AudioOutputDeviceJack::ParameterName::Mandatory() {
136     return false;
137     }
138    
139     std::map<String,DeviceCreationParameter*> AudioOutputDeviceJack::ParameterName::DependsAsParameters() {
140     return std::map<String,DeviceCreationParameter*>(); // no dependencies
141     }
142    
143     std::vector<String> AudioOutputDeviceJack::ParameterName::PossibilitiesAsString(std::map<String,String> Parameters) {
144     return std::vector<String>();
145     }
146    
147     optional<String> AudioOutputDeviceJack::ParameterName::DefaultAsString(std::map<String,String> Parameters) {
148     return (existingJackDevices) ? "LinuxSampler" + ToString(existingJackDevices) : "LinuxSampler";
149     }
150    
151     void AudioOutputDeviceJack::ParameterName::OnSetValue(String s) throw (LinuxSamplerException) {
152     // not possible, as parameter is fix
153     }
154    
155     String AudioOutputDeviceJack::ParameterName::Name() {
156     return "NAME";
157     }
158    
159    
160    
161 schoenebeck 226 // *************** AudioOutputDeviceJack ***************
162     // *
163    
164 schoenebeck 200 /**
165     * Open and initialize connection to the JACK system.
166     *
167     * @param Parameters - optional parameters
168     * @throws AudioOutputException on error
169     * @see AcquireChannels()
170     */
171 schoenebeck 226 AudioOutputDeviceJack::AudioOutputDeviceJack(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters) {
172 schoenebeck 374 if (((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString().size() >= jack_client_name_size())
173     throw LinuxSamplerException("JACK client name too long");
174    
175     if ((hJackClient = jack_client_new(((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString().c_str())) == 0)
176 schoenebeck 200 throw AudioOutputException("Seems Jack server not running.");
177    
178 schoenebeck 374 existingJackDevices++;
179    
180 schoenebeck 200 jack_set_process_callback(hJackClient, __libjack_process_callback, this);
181     jack_on_shutdown(hJackClient, __libjack_shutdown_callback, this);
182     if (jack_activate(hJackClient))
183     throw AudioOutputException("Jack: Cannot activate Jack client.");
184    
185     uiMaxSamplesPerCycle = jack_get_buffer_size(hJackClient);
186    
187 schoenebeck 226 // create audio channels
188     AcquireChannels(((DeviceCreationParameterInt*)Parameters["CHANNELS"])->ValueAsInt());
189 schoenebeck 227
190     // finally activate device if desired
191     if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) Play();
192 schoenebeck 200 }
193    
194     AudioOutputDeviceJack::~AudioOutputDeviceJack() {
195     // destroy jack client
196     jack_client_close(hJackClient);
197 schoenebeck 374 existingJackDevices--;
198 schoenebeck 200 }
199    
200     /**
201     * This method should not be called directly! It will be called by
202     * libjack to demand transmission of further sample points.
203     */
204     int AudioOutputDeviceJack::Process(uint Samples) {
205     if (csIsPlaying.Pop()) {
206     // let all connected engines render 'Samples' sample points
207     return RenderAudio(Samples);
208     }
209     else {
210     // playback stop by zeroing output buffer(s) and not calling connected sampler engines to render audio
211     return RenderSilence(Samples);
212     }
213     }
214    
215     void AudioOutputDeviceJack::Play() {
216     csIsPlaying.PushAndUnlock(true);
217     }
218    
219     bool AudioOutputDeviceJack::IsPlaying() {
220     csIsPlaying.GetUnsafe();
221     }
222    
223     void AudioOutputDeviceJack::Stop() {
224     csIsPlaying.PushAndUnlock(false);
225     }
226    
227 schoenebeck 226 AudioChannel* AudioOutputDeviceJack::CreateChannel(uint ChannelNr) {
228     return new AudioChannelJack(ChannelNr, this);
229 schoenebeck 200 }
230    
231     uint AudioOutputDeviceJack::MaxSamplesPerCycle() {
232     return jack_get_buffer_size(hJackClient);
233     }
234    
235     uint AudioOutputDeviceJack::SampleRate() {
236     return jack_get_sample_rate(hJackClient);
237     }
238    
239     String AudioOutputDeviceJack::Name() {
240 schoenebeck 221 return "JACK";
241 schoenebeck 200 }
242    
243     String AudioOutputDeviceJack::Driver() {
244     return Name();
245     }
246    
247     String AudioOutputDeviceJack::Description() {
248     return "JACK Audio Connection Kit";
249     }
250    
251     String AudioOutputDeviceJack::Version() {
252 schoenebeck 403 String s = "$Revision: 1.17 $";
253 schoenebeck 200 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
254     }
255    
256     // libjack callback functions
257    
258     int __libjack_process_callback(jack_nframes_t nframes, void* arg) {
259     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
260     return pAudioOutputDeviceJack->Process(nframes);
261     }
262    
263     void __libjack_shutdown_callback(void* arg) {
264     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
265     pAudioOutputDeviceJack->Stop();
266     fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
267     }
268    
269     } // namespace LinuxSampler
270    
271     #endif // HAVE_JACK

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