/[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 268 - (hide annotations) (download)
Thu Oct 7 22:20:20 2004 UTC (15 years, 9 months ago) by capela
File size: 9043 byte(s)
* gcc-c++ 3.4.1 compability fixes.

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     namespace LinuxSampler {
31    
32     REGISTER_AUDIO_OUTPUT_DRIVER(AudioOutputDeviceJack);
33    
34     /* Common parameters for now they'll have to be registered here. */
35     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceJack, ParameterActive);
36     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceJack, ParameterChannels);
37    
38 schoenebeck 226
39    
40     // *************** ParameterName ***************
41     // *
42    
43     AudioOutputDeviceJack::AudioChannelJack::ParameterName::ParameterName(AudioChannelJack* pChannel) : AudioChannel::ParameterName(ToString(pChannel->ChannelNr)) {
44     this->pChannel = pChannel;
45     }
46    
47     void AudioOutputDeviceJack::AudioChannelJack::ParameterName::OnSetValue(String s) {
48 schoenebeck 227 if (jack_port_set_name(pChannel->hJackPort, s.c_str())) throw AudioOutputException("Failed to rename JACK port");
49 schoenebeck 226 }
50    
51    
52    
53     // *************** ParameterJackBindings ***************
54     // *
55    
56     AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::ParameterJackBindings(AudioChannelJack* pChannel) : DeviceRuntimeParameterStrings(std::vector<String>()) {
57     this->pChannel = pChannel;
58     }
59    
60     String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Description() {
61     return "Bindings to other JACK clients";
62     }
63    
64     bool AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Fix() {
65     return false;
66     }
67    
68     std::vector<String> AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::PossibilitiesAsString() {
69 schoenebeck 227 const char** pPortNames = jack_get_ports(pChannel->pDevice->hJackClient, NULL, NULL, JackPortIsInput);
70 schoenebeck 226 if (!pPortNames) return std::vector<String>();
71     std::vector<String> result;
72     for (int i = 0; pPortNames[i]; i++) result.push_back(pPortNames[i]);
73     //free(pPortNames); FIXME: pPortNames should be freed here
74     return result;
75     }
76    
77     void AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::OnSetValue(std::vector<String> vS) {
78 schoenebeck 227 // TODO: we should remove all existing bindings before we connect new ones here
79     String src_name = "LinuxSampler:" + ((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     // *************** AudioOutputDeviceJack ***************
118     // *
119    
120 schoenebeck 200 /**
121     * Open and initialize connection to the JACK system.
122     *
123     * @param Parameters - optional parameters
124     * @throws AudioOutputException on error
125     * @see AcquireChannels()
126     */
127 schoenebeck 226 AudioOutputDeviceJack::AudioOutputDeviceJack(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters) {
128 schoenebeck 200 if ((hJackClient = jack_client_new("LinuxSampler")) == 0)
129     throw AudioOutputException("Seems Jack server not running.");
130    
131     jack_set_process_callback(hJackClient, __libjack_process_callback, this);
132     jack_on_shutdown(hJackClient, __libjack_shutdown_callback, this);
133     if (jack_activate(hJackClient))
134     throw AudioOutputException("Jack: Cannot activate Jack client.");
135    
136     uiMaxSamplesPerCycle = jack_get_buffer_size(hJackClient);
137    
138 schoenebeck 226 // create audio channels
139     AcquireChannels(((DeviceCreationParameterInt*)Parameters["CHANNELS"])->ValueAsInt());
140 schoenebeck 227
141     // finally activate device if desired
142     if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) Play();
143 schoenebeck 200 }
144    
145     AudioOutputDeviceJack::~AudioOutputDeviceJack() {
146     // destroy jack client
147     jack_client_close(hJackClient);
148     }
149    
150     /**
151     * This method should not be called directly! It will be called by
152     * libjack to demand transmission of further sample points.
153     */
154     int AudioOutputDeviceJack::Process(uint Samples) {
155     if (csIsPlaying.Pop()) {
156     // let all connected engines render 'Samples' sample points
157     return RenderAudio(Samples);
158     }
159     else {
160     // playback stop by zeroing output buffer(s) and not calling connected sampler engines to render audio
161     return RenderSilence(Samples);
162     }
163     }
164    
165     void AudioOutputDeviceJack::Play() {
166     csIsPlaying.PushAndUnlock(true);
167     }
168    
169     bool AudioOutputDeviceJack::IsPlaying() {
170     csIsPlaying.GetUnsafe();
171     }
172    
173     void AudioOutputDeviceJack::Stop() {
174     csIsPlaying.PushAndUnlock(false);
175     }
176    
177 schoenebeck 226 AudioChannel* AudioOutputDeviceJack::CreateChannel(uint ChannelNr) {
178     return new AudioChannelJack(ChannelNr, this);
179 schoenebeck 200 }
180    
181     uint AudioOutputDeviceJack::MaxSamplesPerCycle() {
182     return jack_get_buffer_size(hJackClient);
183     }
184    
185     uint AudioOutputDeviceJack::SampleRate() {
186     return jack_get_sample_rate(hJackClient);
187     }
188    
189     String AudioOutputDeviceJack::Name() {
190 schoenebeck 221 return "JACK";
191 schoenebeck 200 }
192    
193     String AudioOutputDeviceJack::Driver() {
194     return Name();
195     }
196    
197     String AudioOutputDeviceJack::Description() {
198     return "JACK Audio Connection Kit";
199     }
200    
201     String AudioOutputDeviceJack::Version() {
202 capela 268 String s = "$Revision: 1.13 $";
203 schoenebeck 200 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
204     }
205    
206     // libjack callback functions
207    
208     int __libjack_process_callback(jack_nframes_t nframes, void* arg) {
209     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
210     return pAudioOutputDeviceJack->Process(nframes);
211     }
212    
213     void __libjack_shutdown_callback(void* arg) {
214     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
215     pAudioOutputDeviceJack->Stop();
216     fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
217     }
218    
219     } // namespace LinuxSampler
220    
221     #endif // HAVE_JACK

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