/[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 226 - (hide annotations) (download)
Wed Aug 25 22:00:33 2004 UTC (15 years, 7 months ago) by schoenebeck
File size: 8653 byte(s)
* ALSA MIDI driver: create one MIDI port by default, implemented parameter
  info for parameter 'ALSA_SEQ_BINDINGS'
* ALSA audio driver: implemented parameter info for driver parameters
  'FRAGMENTS' and 'FRAGMENTSIZE'
* JACK audio driver: fixed creation of channels on device creation, channel
  parameter 'NAME' now actually updates the respective JACK port name,
  implemented channel parameter 'JACK_BINDINGS' (as well as its parameter
  info)
* src/network/lscpserver.cpp: fixed commands
  "GET MIDI_INPUT_DRIVER_PARAMETER INFO" and
  "GET AUDIO_OUTPUT_DRIVER_PARAMETER  INFO", fixed backward compatibility
  for "SET AUDIO_OUTPUT_TYPE" and "SET MIDI_INPUT_TYPE" commands
* src/networ/lscp.y: added comma character (',') to symbol 'char'
* src/drivers/DeviceParameter.cpp: fixed methods RangeMin(), RangeMax() in
  class DeviceCreationParameterInt which returned wrong values

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     #if HAVE_JACK
27    
28     namespace LinuxSampler {
29    
30     REGISTER_AUDIO_OUTPUT_DRIVER(AudioOutputDeviceJack);
31    
32     /* Common parameters for now they'll have to be registered here. */
33     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceJack, ParameterActive);
34     REGISTER_AUDIO_OUTPUT_DRIVER_PARAMETER(AudioOutputDeviceJack, ParameterChannels);
35    
36 schoenebeck 226
37    
38     // *************** ParameterName ***************
39     // *
40    
41     AudioOutputDeviceJack::AudioChannelJack::ParameterName::ParameterName(AudioChannelJack* pChannel) : AudioChannel::ParameterName(ToString(pChannel->ChannelNr)) {
42     this->pChannel = pChannel;
43     }
44    
45     void AudioOutputDeviceJack::AudioChannelJack::ParameterName::OnSetValue(String s) {
46     String name = "LinuxSampler:" + s;
47     if (jack_port_set_name(pChannel->hJackPort, name.c_str())) throw AudioOutputException("Failed to rename JACK port");
48     }
49    
50    
51    
52     // *************** ParameterJackBindings ***************
53     // *
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     const char** pPortNames = jack_get_ports(pChannel->pDevice->hJackClient, NULL, NULL, 0);
69     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     String src_name = "LinuxSampler:" + pChannel->Parameters["NAME"]->Value();
78     for (int i = 0; i < vS.size(); i++) {
79     String dst_name = vS[i];
80     if (jack_connect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str())) {
81     throw AudioOutputException("Jack: Cannot connect to port '" + dst_name + "'");
82     }
83     }
84     }
85    
86     String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Name() {
87     return "JACK_BINDINGS";
88     }
89    
90    
91    
92     // *************** AudioChannelJack ***************
93     // *
94    
95     AudioOutputDeviceJack::AudioChannelJack::AudioChannelJack(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) : AudioChannel(ChannelNr, CreateJackPort(ChannelNr, pDevice), pDevice->uiMaxSamplesPerCycle) {
96     this->pDevice = pDevice;
97     this->ChannelNr = ChannelNr;
98     Parameters["NAME"] = new ParameterName(this);
99     Parameters["JACK_BINDINGS"] = new ParameterJackBindings(this);
100     }
101    
102     AudioOutputDeviceJack::AudioChannelJack::~AudioChannelJack() {
103     //TODO: delete JACK port
104     }
105    
106     float* AudioOutputDeviceJack::AudioChannelJack::CreateJackPort(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) {
107     String port_id = "LinuxSampler:" + ToString(ChannelNr);
108     hJackPort = jack_port_register(pDevice->hJackClient, port_id.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
109     if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");
110     return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);
111     }
112    
113    
114    
115     // *************** AudioOutputDeviceJack ***************
116     // *
117    
118 schoenebeck 200 /**
119     * Open and initialize connection to the JACK system.
120     *
121     * @param Parameters - optional parameters
122     * @throws AudioOutputException on error
123     * @see AcquireChannels()
124     */
125 schoenebeck 226 AudioOutputDeviceJack::AudioOutputDeviceJack(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters) {
126 schoenebeck 200 if ((hJackClient = jack_client_new("LinuxSampler")) == 0)
127     throw AudioOutputException("Seems Jack server not running.");
128    
129     jack_set_process_callback(hJackClient, __libjack_process_callback, this);
130     jack_on_shutdown(hJackClient, __libjack_shutdown_callback, this);
131     if (jack_activate(hJackClient))
132     throw AudioOutputException("Jack: Cannot activate Jack client.");
133    
134     uiMaxSamplesPerCycle = jack_get_buffer_size(hJackClient);
135    
136 schoenebeck 226 // create audio channels
137     AcquireChannels(((DeviceCreationParameterInt*)Parameters["CHANNELS"])->ValueAsInt());
138 schoenebeck 200 }
139    
140     AudioOutputDeviceJack::~AudioOutputDeviceJack() {
141     // destroy jack client
142     jack_client_close(hJackClient);
143     }
144    
145     /**
146     * This method should not be called directly! It will be called by
147     * libjack to demand transmission of further sample points.
148     */
149     int AudioOutputDeviceJack::Process(uint Samples) {
150     if (csIsPlaying.Pop()) {
151     // let all connected engines render 'Samples' sample points
152     return RenderAudio(Samples);
153     }
154     else {
155     // playback stop by zeroing output buffer(s) and not calling connected sampler engines to render audio
156     return RenderSilence(Samples);
157     }
158     }
159    
160     void AudioOutputDeviceJack::Play() {
161     csIsPlaying.PushAndUnlock(true);
162     }
163    
164     bool AudioOutputDeviceJack::IsPlaying() {
165     csIsPlaying.GetUnsafe();
166     }
167    
168     void AudioOutputDeviceJack::Stop() {
169     csIsPlaying.PushAndUnlock(false);
170     }
171    
172 schoenebeck 226 AudioChannel* AudioOutputDeviceJack::CreateChannel(uint ChannelNr) {
173     return new AudioChannelJack(ChannelNr, this);
174 schoenebeck 200 }
175    
176     uint AudioOutputDeviceJack::MaxSamplesPerCycle() {
177     return jack_get_buffer_size(hJackClient);
178     }
179    
180     uint AudioOutputDeviceJack::SampleRate() {
181     return jack_get_sample_rate(hJackClient);
182     }
183    
184     String AudioOutputDeviceJack::Name() {
185 schoenebeck 221 return "JACK";
186 schoenebeck 200 }
187    
188     String AudioOutputDeviceJack::Driver() {
189     return Name();
190     }
191    
192     String AudioOutputDeviceJack::Description() {
193     return "JACK Audio Connection Kit";
194     }
195    
196     String AudioOutputDeviceJack::Version() {
197 schoenebeck 226 String s = "$Revision: 1.11 $";
198 schoenebeck 200 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
199     }
200    
201     // libjack callback functions
202    
203     int __libjack_process_callback(jack_nframes_t nframes, void* arg) {
204     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
205     return pAudioOutputDeviceJack->Process(nframes);
206     }
207    
208     void __libjack_shutdown_callback(void* arg) {
209     AudioOutputDeviceJack* pAudioOutputDeviceJack = (AudioOutputDeviceJack*) arg;
210     pAudioOutputDeviceJack->Stop();
211     fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
212     }
213    
214     } // namespace LinuxSampler
215    
216     #endif // HAVE_JACK

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