drivers/audio/AudioOutputDeviceJack.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
 *                                                                         *
 *   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., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "AudioOutputDeviceJack.h"
#include "AudioOutputDeviceFactory.h"

#include <errno.h>

#if HAVE_JACK

#ifndef HAVE_JACK_CLIENT_NAME_SIZE
#define jack_client_name_size() 33
#endif

namespace LinuxSampler {

    /// number of currently existing JACK audio output devices in LinuxSampler
    static int existingJackDevices = 0;

// *************** AudioChannelJack::ParameterName ***************
// *

    AudioOutputDeviceJack::AudioChannelJack::ParameterName::ParameterName(AudioChannelJack* pChannel) : AudioChannel::ParameterName(ToString(pChannel->ChannelNr)) {
        this->pChannel = pChannel;
    }

    void AudioOutputDeviceJack::AudioChannelJack::ParameterName::OnSetValue(String s) {
        if (jack_port_set_name(pChannel->hJackPort, s.c_str())) throw AudioOutputException("Failed to rename JACK port");
    }


// *************** AudioChannelJack::ParameterJackBindings ***************
// *

    AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::ParameterJackBindings(AudioChannelJack* pChannel) : DeviceRuntimeParameterStrings(std::vector<String>()) {
        this->pChannel = pChannel;
    }

    String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Description() {
        return "Bindings to other JACK clients";
    }

    bool AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Fix() {
        return false;
    }

    std::vector<String> AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::PossibilitiesAsString() {
        const char** pPortNames = jack_get_ports(pChannel->pDevice->hJackClient, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput);
        if (!pPortNames) return std::vector<String>();
        std::vector<String> result;
        for (int i = 0; pPortNames[i]; i++) result.push_back(pPortNames[i]);
        free(pPortNames);
        return result;
    }

    void AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::OnSetValue(std::vector<String> vS) {
        String src_name = ((DeviceCreationParameterString*)pChannel->pDevice->Parameters["NAME"])->ValueAsString() + ":" +
                          ((DeviceRuntimeParameterString*)pChannel->Parameters["NAME"])->ValueAsString();
        // disconnect all current bindings first
        for (int i = 0; i < Bindings.size(); i++) {
            String dst_name = Bindings[i];
            int res = jack_disconnect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str());
        }
        // connect new bindings
        for (int i = 0; i < vS.size(); i++) {
            String dst_name = vS[i];
            int res = jack_connect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str());
            if (res == EEXIST) throw AudioOutputException("Jack: Connection to port '" + dst_name + "' already established");
            else if (res)      throw AudioOutputException("Jack: Cannot connect port '" + src_name + "' to port '" + dst_name + "'");
        }
        // remember bindings
        Bindings = vS;
    }

    String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Name() {
        return "JACK_BINDINGS";
    }


// *************** AudioChannelJack ***************
// *

    AudioOutputDeviceJack::AudioChannelJack::AudioChannelJack(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) : AudioChannel(ChannelNr, CreateJackPort(ChannelNr, pDevice), pDevice->uiMaxSamplesPerCycle) {
        this->pDevice   = pDevice;
        this->ChannelNr = ChannelNr;
        delete Parameters["NAME"];
        Parameters["NAME"]          = new ParameterName(this);
        Parameters["JACK_BINDINGS"] = new ParameterJackBindings(this);
    }

    AudioOutputDeviceJack::AudioChannelJack::~AudioChannelJack() {
        //TODO: delete JACK port
    }

    float* AudioOutputDeviceJack::AudioChannelJack::CreateJackPort(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) {
        String port_id = ToString(ChannelNr);
        hJackPort = jack_port_register(pDevice->hJackClient, port_id.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
        if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");
        return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);
    }


// *************** AudioOutputDeviceJack::ParameterName ***************
// *

    AudioOutputDeviceJack::ParameterName::ParameterName() : DeviceCreationParameterString() {
        InitWithDefault(); // use default name
    }

    AudioOutputDeviceJack::ParameterName::ParameterName(String s) throw (Exception) : DeviceCreationParameterString(s) {
    }

    String AudioOutputDeviceJack::ParameterName::Description() {
        return "Arbitrary JACK client name";
    }

    bool AudioOutputDeviceJack::ParameterName::Fix() {
        return true;
    }

    bool AudioOutputDeviceJack::ParameterName::Mandatory() {
        return false;
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDeviceJack::ParameterName::DependsAsParameters() {
        return std::map<String,DeviceCreationParameter*>(); // no dependencies
    }

    std::vector<String> AudioOutputDeviceJack::ParameterName::PossibilitiesAsString(std::map<String,String> Parameters) {
        return std::vector<String>();
    }

    optional<String> AudioOutputDeviceJack::ParameterName::DefaultAsString(std::map<String,String> Parameters) {
        return (existingJackDevices) ? "LinuxSampler" + ToString(existingJackDevices) : "LinuxSampler";
    }

    void AudioOutputDeviceJack::ParameterName::OnSetValue(String s) throw (Exception) {
        // not possible, as parameter is fix
    }

    String AudioOutputDeviceJack::ParameterName::Name() {
        return "NAME";
    }


// *************** AudioOutputDeviceJack ***************
// *

    /**
     * Open and initialize connection to the JACK system.
     *
     * @param Parameters - optional parameters
     * @throws AudioOutputException  on error
     * @see AcquireChannels()
     */
    AudioOutputDeviceJack::AudioOutputDeviceJack(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters) {
        JackClient* pJackClient = JackClient::CreateAudio(((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString());
        existingJackDevices++;
        pJackClient->SetAudioOutputDevice(this);
        hJackClient = pJackClient->hJackClient;
        uiMaxSamplesPerCycle = jack_get_buffer_size(hJackClient);

        // create audio channels
        AcquireChannels(((DeviceCreationParameterInt*)Parameters["CHANNELS"])->ValueAsInt());

        // finally activate device if desired
        if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) Play();
    }

    AudioOutputDeviceJack::~AudioOutputDeviceJack() {
        // destroy jack client if there is no midi device associated with it
        JackClient::ReleaseAudio(((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString());
        existingJackDevices--;
    }

    /**
     * This method should not be called directly! It will be called by
     * libjack to demand transmission of further sample points.
     */
    int AudioOutputDeviceJack::Process(uint Samples) {
        if (csIsPlaying.Pop()) {
            // let all connected engines render 'Samples' sample points
            return RenderAudio(Samples);
        }
        else {
            // playback stop by zeroing output buffer(s) and not calling connected sampler engines to render audio
            return RenderSilence(Samples);
        }
    }

    void AudioOutputDeviceJack::Play() {
        csIsPlaying.PushAndUnlock(true);
    }

    bool AudioOutputDeviceJack::IsPlaying() {
        return csIsPlaying.GetUnsafe();
    }

    void AudioOutputDeviceJack::Stop() {
        csIsPlaying.PushAndUnlock(false);
    }

    AudioChannel* AudioOutputDeviceJack::CreateChannel(uint ChannelNr) {
        return new AudioChannelJack(ChannelNr, this);
    }

    uint AudioOutputDeviceJack::MaxSamplesPerCycle() {
        return jack_get_buffer_size(hJackClient);
    }

    uint AudioOutputDeviceJack::SampleRate() {
        return jack_get_sample_rate(hJackClient);
    }

    String AudioOutputDeviceJack::Name() {
        return "JACK";
    }

    String AudioOutputDeviceJack::Driver() {
        return Name();
    }

    String AudioOutputDeviceJack::Description() {
        return "JACK Audio Connection Kit";
    }

    String AudioOutputDeviceJack::Version() {
       String s = "$Revision: 1.22 $";
       return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
    }


// *************** JackClient ***************
// *

    // libjack callback functions

    int linuxsampler_libjack_process_callback(jack_nframes_t nframes, void* arg) {
        return static_cast<JackClient*>(arg)->Process(nframes);
    }

    void linuxsampler_libjack_shutdown_callback(void* arg) {
        static_cast<JackClient*>(arg)->Stop();
        fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
    }

    std::map<String, JackClient*> JackClient::Clients;

    int JackClient::Process(uint Samples) {
        const config_t& config = ConfigReader.Lock();
#if HAVE_JACK_MIDI
        if (config.MidiDevice) config.MidiDevice->Process(Samples);
#endif
        int res = config.AudioDevice ? config.AudioDevice->Process(Samples) : 0;
        ConfigReader.Unlock();
        return res;
    }

    void JackClient::Stop() {
        const config_t& config = ConfigReader.Lock();
        if (config.AudioDevice) config.AudioDevice->Stop();
        ConfigReader.Unlock();
    }

    JackClient::JackClient(String Name) : ConfigReader(Config) {
        {
            config_t& config = Config.GetConfigForUpdate();
            config.AudioDevice = 0;
            config.MidiDevice = 0;
        }
        {
            config_t& config = Config.SwitchConfig();
            config.AudioDevice = 0;
            config.MidiDevice = 0;
        }
        audio = midi = false;
        if (Name.size() >= jack_client_name_size())
            throw Exception("JACK client name too long");
        if ((hJackClient = jack_client_new(Name.c_str())) == 0)
            throw Exception("Seems Jack server is not running.");
        jack_set_process_callback(hJackClient, linuxsampler_libjack_process_callback, this);
        jack_on_shutdown(hJackClient, linuxsampler_libjack_shutdown_callback, this);
        if (jack_activate(hJackClient))
            throw Exception("Jack: Cannot activate Jack client.");
    }

    JackClient::~JackClient() {
        jack_client_close(hJackClient);
    }

    void JackClient::SetAudioOutputDevice(AudioOutputDeviceJack* device) {
        Config.GetConfigForUpdate().AudioDevice = device;
        Config.SwitchConfig().AudioDevice = device;
    }

    void JackClient::SetMidiInputDevice(MidiInputDeviceJack* device) {
        Config.GetConfigForUpdate().MidiDevice = device;
        Config.SwitchConfig().MidiDevice = device;
    }

    JackClient* JackClient::CreateAudio(String Name) { // static
        JackClient* client;
        std::map<String, JackClient*>::const_iterator it = Clients.find(Name);
        if (it == Clients.end()) {
            client = new JackClient(Name);
            Clients[Name] = client;
        } else {
            client = it->second;
            if (client->audio) throw Exception("Jack audio device '" + Name + "' already exists");
        }
        client->audio = true;
        return client;
    }

    JackClient* JackClient::CreateMidi(String Name) { // static
        JackClient* client;
        std::map<String, JackClient*>::const_iterator it = Clients.find(Name);
        if (it == Clients.end()) {
            client = new JackClient(Name);
            Clients[Name] = client;
        } else {
            client = it->second;
            if (client->midi) throw Exception("Jack MIDI device '" + Name + "' already exists");
        }
        client->midi = true;
        return client;
    }

    void JackClient::ReleaseAudio(String Name) { // static
        JackClient* client = Clients[Name];
        client->SetAudioOutputDevice(0);
        client->audio = false;
        if (!client->midi) {
            Clients.erase(Name);
            delete client;
        }
    }

    void JackClient::ReleaseMidi(String Name) { // static
        JackClient* client = Clients[Name];
        client->SetMidiInputDevice(0);
        client->midi = false;
        if (!client->audio) {
            Clients.erase(Name);
            delete client;
        }
    }

} // namespace LinuxSampler

#endif // HAVE_JACK
1	schoenebeck	200	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	persson	1651	* Copyright (C) 2005 - 2008 Christian Schoenebeck *
7	schoenebeck	200	* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "AudioOutputDeviceJack.h"
25			#include "AudioOutputDeviceFactory.h"
26
27	capela	268	#include <errno.h>
28
29	schoenebeck	200	#if HAVE_JACK
30
31	persson	379	#ifndef HAVE_JACK_CLIENT_NAME_SIZE
32			#define jack_client_name_size() 33
33			#endif
34
35	schoenebeck	200	namespace LinuxSampler {
36
37	schoenebeck	374	/// number of currently existing JACK audio output devices in LinuxSampler
38			static int existingJackDevices = 0;
39
40			// ************* AudioChannelJack::ParameterName *************
41	schoenebeck	226	// *
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	schoenebeck	374	// ************* AudioChannelJack::ParameterJackBindings *************
54	schoenebeck	226	// *
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	persson	1651	const char** pPortNames = jack_get_ports(pChannel->pDevice->hJackClient, NULL, JACK_DEFAULT_AUDIO_TYPE, 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	persson	1651	free(pPortNames);
74	schoenebeck	226	return result;
75			}
76
77			void AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::OnSetValue(std::vector<String> vS) {
78	schoenebeck	403	String src_name = ((DeviceCreationParameterString*)pChannel->pDevice->Parameters["NAME"])->ValueAsString() + ":" +
79			((DeviceRuntimeParameterString*)pChannel->Parameters["NAME"])->ValueAsString();
80	schoenebeck	483	// disconnect all current bindings first
81			for (int i = 0; i < Bindings.size(); i++) {
82			String dst_name = Bindings[i];
83			int res = jack_disconnect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str());
84			}
85			// connect new bindings
86	schoenebeck	226	for (int i = 0; i < vS.size(); i++) {
87			String dst_name = vS[i];
88	schoenebeck	227	int res = jack_connect(pChannel->pDevice->hJackClient, src_name.c_str(), dst_name.c_str());
89			if (res == EEXIST) throw AudioOutputException("Jack: Connection to port '" + dst_name + "' already established");
90			else if (res) throw AudioOutputException("Jack: Cannot connect port '" + src_name + "' to port '" + dst_name + "'");
91	schoenebeck	226	}
92	schoenebeck	483	// remember bindings
93			Bindings = vS;
94	schoenebeck	226	}
95
96			String AudioOutputDeviceJack::AudioChannelJack::ParameterJackBindings::Name() {
97			return "JACK_BINDINGS";
98			}
99
100
101
102			// ************* AudioChannelJack *************
103			// *
104
105			AudioOutputDeviceJack::AudioChannelJack::AudioChannelJack(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) : AudioChannel(ChannelNr, CreateJackPort(ChannelNr, pDevice), pDevice->uiMaxSamplesPerCycle) {
106			this->pDevice = pDevice;
107			this->ChannelNr = ChannelNr;
108	persson	1248	delete Parameters["NAME"];
109	schoenebeck	226	Parameters["NAME"] = new ParameterName(this);
110			Parameters["JACK_BINDINGS"] = new ParameterJackBindings(this);
111			}
112
113			AudioOutputDeviceJack::AudioChannelJack::~AudioChannelJack() {
114			//TODO: delete JACK port
115			}
116
117			float* AudioOutputDeviceJack::AudioChannelJack::CreateJackPort(uint ChannelNr, AudioOutputDeviceJack* pDevice) throw (AudioOutputException) {
118	schoenebeck	227	String port_id = ToString(ChannelNr);
119	schoenebeck	226	hJackPort = jack_port_register(pDevice->hJackClient, port_id.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
120			if (!hJackPort) throw AudioOutputException("Jack: Cannot register Jack output port.");
121			return (float*) jack_port_get_buffer(hJackPort, pDevice->uiMaxSamplesPerCycle);
122			}
123
124
125
126	schoenebeck	374	// ************* AudioOutputDeviceJack::ParameterName *************
127			// *
128
129			AudioOutputDeviceJack::ParameterName::ParameterName() : DeviceCreationParameterString() {
130			InitWithDefault(); // use default name
131			}
132
133	schoenebeck	880	AudioOutputDeviceJack::ParameterName::ParameterName(String s) throw (Exception) : DeviceCreationParameterString(s) {
134	schoenebeck	374	}
135
136			String AudioOutputDeviceJack::ParameterName::Description() {
137			return "Arbitrary JACK client name";
138			}
139
140			bool AudioOutputDeviceJack::ParameterName::Fix() {
141			return true;
142			}
143
144			bool AudioOutputDeviceJack::ParameterName::Mandatory() {
145			return false;
146			}
147
148			std::map<String,DeviceCreationParameter*> AudioOutputDeviceJack::ParameterName::DependsAsParameters() {
149			return std::map<String,DeviceCreationParameter*>(); // no dependencies
150			}
151
152			std::vector<String> AudioOutputDeviceJack::ParameterName::PossibilitiesAsString(std::map<String,String> Parameters) {
153			return std::vector<String>();
154			}
155
156			optional<String> AudioOutputDeviceJack::ParameterName::DefaultAsString(std::map<String,String> Parameters) {
157			return (existingJackDevices) ? "LinuxSampler" + ToString(existingJackDevices) : "LinuxSampler";
158			}
159
160	schoenebeck	880	void AudioOutputDeviceJack::ParameterName::OnSetValue(String s) throw (Exception) {
161	schoenebeck	374	// not possible, as parameter is fix
162			}
163
164			String AudioOutputDeviceJack::ParameterName::Name() {
165			return "NAME";
166			}
167
168
169
170	schoenebeck	226	// ************* AudioOutputDeviceJack *************
171			// *
172
173	schoenebeck	200	/**
174			* Open and initialize connection to the JACK system.
175			*
176			* @param Parameters - optional parameters
177			* @throws AudioOutputException on error
178			* @see AcquireChannels()
179			*/
180	schoenebeck	226	AudioOutputDeviceJack::AudioOutputDeviceJack(std::map<String,DeviceCreationParameter*> Parameters) : AudioOutputDevice(Parameters) {
181	persson	1651	JackClient* pJackClient = JackClient::CreateAudio(((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString());
182	schoenebeck	374	existingJackDevices++;
183	persson	1651	pJackClient->SetAudioOutputDevice(this);
184			hJackClient = pJackClient->hJackClient;
185	schoenebeck	200	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	persson	1651	// destroy jack client if there is no midi device associated with it
196			JackClient::ReleaseAudio(((DeviceCreationParameterString*)Parameters["NAME"])->ValueAsString());
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	persson	497	return csIsPlaying.GetUnsafe();
221	schoenebeck	200	}
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	persson	1651	String s = "$Revision: 1.22 $";
253	schoenebeck	200	return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
254			}
255
256	persson	1651
257
258			// ************* JackClient *************
259			// *
260
261	schoenebeck	200	// libjack callback functions
262
263	persson	1651	int linuxsampler_libjack_process_callback(jack_nframes_t nframes, void* arg) {
264			return static_cast<JackClient*>(arg)->Process(nframes);
265	schoenebeck	200	}
266
267	persson	1651	void linuxsampler_libjack_shutdown_callback(void* arg) {
268			static_cast<JackClient*>(arg)->Stop();
269	schoenebeck	200	fprintf(stderr, "Jack: Jack server shutdown, exiting.\n");
270			}
271
272	persson	1651	std::map<String, JackClient*> JackClient::Clients;
273
274			int JackClient::Process(uint Samples) {
275			const config_t& config = ConfigReader.Lock();
276			#if HAVE_JACK_MIDI
277			if (config.MidiDevice) config.MidiDevice->Process(Samples);
278			#endif
279			int res = config.AudioDevice ? config.AudioDevice->Process(Samples) : 0;
280			ConfigReader.Unlock();
281			return res;
282			}
283
284			void JackClient::Stop() {
285			const config_t& config = ConfigReader.Lock();
286			if (config.AudioDevice) config.AudioDevice->Stop();
287			ConfigReader.Unlock();
288			}
289
290			JackClient::JackClient(String Name) : ConfigReader(Config) {
291			{
292			config_t& config = Config.GetConfigForUpdate();
293			config.AudioDevice = 0;
294			config.MidiDevice = 0;
295			}
296			{
297			config_t& config = Config.SwitchConfig();
298			config.AudioDevice = 0;
299			config.MidiDevice = 0;
300			}
301			audio = midi = false;
302			if (Name.size() >= jack_client_name_size())
303			throw Exception("JACK client name too long");
304			if ((hJackClient = jack_client_new(Name.c_str())) == 0)
305			throw Exception("Seems Jack server is not running.");
306			jack_set_process_callback(hJackClient, linuxsampler_libjack_process_callback, this);
307			jack_on_shutdown(hJackClient, linuxsampler_libjack_shutdown_callback, this);
308			if (jack_activate(hJackClient))
309			throw Exception("Jack: Cannot activate Jack client.");
310			}
311
312			JackClient::~JackClient() {
313			jack_client_close(hJackClient);
314			}
315
316			void JackClient::SetAudioOutputDevice(AudioOutputDeviceJack* device) {
317			Config.GetConfigForUpdate().AudioDevice = device;
318			Config.SwitchConfig().AudioDevice = device;
319			}
320
321			void JackClient::SetMidiInputDevice(MidiInputDeviceJack* device) {
322			Config.GetConfigForUpdate().MidiDevice = device;
323			Config.SwitchConfig().MidiDevice = device;
324			}
325
326			JackClient* JackClient::CreateAudio(String Name) { // static
327			JackClient* client;
328			std::map<String, JackClient*>::const_iterator it = Clients.find(Name);
329			if (it == Clients.end()) {
330			client = new JackClient(Name);
331			Clients[Name] = client;
332			} else {
333			client = it->second;
334			if (client->audio) throw Exception("Jack audio device '" + Name + "' already exists");
335			}
336			client->audio = true;
337			return client;
338			}
339
340			JackClient* JackClient::CreateMidi(String Name) { // static
341			JackClient* client;
342			std::map<String, JackClient*>::const_iterator it = Clients.find(Name);
343			if (it == Clients.end()) {
344			client = new JackClient(Name);
345			Clients[Name] = client;
346			} else {
347			client = it->second;
348			if (client->midi) throw Exception("Jack MIDI device '" + Name + "' already exists");
349			}
350			client->midi = true;
351			return client;
352			}
353
354			void JackClient::ReleaseAudio(String Name) { // static
355			JackClient* client = Clients[Name];
356			client->SetAudioOutputDevice(0);
357			client->audio = false;
358			if (!client->midi) {
359			Clients.erase(Name);
360			delete client;
361			}
362			}
363
364			void JackClient::ReleaseMidi(String Name) { // static
365			JackClient* client = Clients[Name];
366			client->SetMidiInputDevice(0);
367			client->midi = false;
368			if (!client->audio) {
369			Clients.erase(Name);
370			delete client;
371			}
372			}
373
374	schoenebeck	200	} // namespace LinuxSampler
375
376			#endif // HAVE_JACK