drivers/audio/AudioOutputDevice.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 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 "AudioOutputDeviceFactory.h"
#include "AudioOutputDevice.h"
#include "../../common/global_private.h"

namespace LinuxSampler {

// *************** ParameterActive ***************
// *

    AudioOutputDevice::ParameterActive::ParameterActive() : DeviceCreationParameterBool() {
        InitWithDefault();
    }

    AudioOutputDevice::ParameterActive::ParameterActive(String s) : DeviceCreationParameterBool(s) {
    }

    String AudioOutputDevice::ParameterActive::Description() {
        return "Enable / disable device";
    }

    bool AudioOutputDevice::ParameterActive::Fix() {
        return false;
    }

    bool AudioOutputDevice::ParameterActive::Mandatory() {
        return false;
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterActive::DependsAsParameters() {
        return std::map<String,DeviceCreationParameter*>();
    }

    optional<bool> AudioOutputDevice::ParameterActive::DefaultAsBool(std::map<String,String> Parameters) {
        return true;
    }

    void AudioOutputDevice::ParameterActive::OnSetValue(bool b) throw (Exception) {
        if (b) ((AudioOutputDevice*)pDevice)->Play();
        else ((AudioOutputDevice*)pDevice)->Stop();
    }

    String AudioOutputDevice::ParameterActive::Name() {
        return "ACTIVE";
    }


// *************** ParameterSampleRate ***************
// *

    AudioOutputDevice::ParameterSampleRate::ParameterSampleRate() : DeviceCreationParameterInt() {
        InitWithDefault();
    }

    AudioOutputDevice::ParameterSampleRate::ParameterSampleRate(String s) : DeviceCreationParameterInt(s) {
    }

    String AudioOutputDevice::ParameterSampleRate::Description() {
        return "Output sample rate";
    }

    bool AudioOutputDevice::ParameterSampleRate::Fix() {
        return true;
    }

    bool AudioOutputDevice::ParameterSampleRate::Mandatory() {
        return false;
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterSampleRate::DependsAsParameters() {
        return std::map<String,DeviceCreationParameter*>();
    }

    optional<int> AudioOutputDevice::ParameterSampleRate::DefaultAsInt(std::map<String,String> Parameters) {
        return 44100;
    }

    optional<int> AudioOutputDevice::ParameterSampleRate::RangeMinAsInt(std::map<String,String> Parameters) {
        return optional<int>::nothing;
    }

    optional<int> AudioOutputDevice::ParameterSampleRate::RangeMaxAsInt(std::map<String,String> Parameters) {
        return optional<int>::nothing;
    }

    std::vector<int> AudioOutputDevice::ParameterSampleRate::PossibilitiesAsInt(std::map<String,String> Parameters) {
        return std::vector<int>();
    }

    void AudioOutputDevice::ParameterSampleRate::OnSetValue(int i) throw (Exception) {
        /* cannot happen, as parameter is fix */
    }

    String AudioOutputDevice::ParameterSampleRate::Name() {
        return "SAMPLERATE";
    }


// *************** ParameterChannels ***************
// *

    AudioOutputDevice::ParameterChannels::ParameterChannels() : DeviceCreationParameterInt() {
       InitWithDefault();
    }

    AudioOutputDevice::ParameterChannels::ParameterChannels(String s) : DeviceCreationParameterInt(s) {
    }

    String AudioOutputDevice::ParameterChannels::Description() {
        return "Number of output channels";
    }

    bool AudioOutputDevice::ParameterChannels::Fix() {
        return false;
    }

    bool AudioOutputDevice::ParameterChannels::Mandatory() {
        return false;
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterChannels::DependsAsParameters() {
        return std::map<String,DeviceCreationParameter*>();
    }

    optional<int> AudioOutputDevice::ParameterChannels::DefaultAsInt(std::map<String,String> Parameters) {
        return 2;
    }

    optional<int> AudioOutputDevice::ParameterChannels::RangeMinAsInt(std::map<String,String> Parameters) {
        return 1;
    }

    optional<int> AudioOutputDevice::ParameterChannels::RangeMaxAsInt(std::map<String,String> Parameters) {
        return 100;
    }

    std::vector<int> AudioOutputDevice::ParameterChannels::PossibilitiesAsInt(std::map<String,String> Parameters) {
        return std::vector<int>();
    }

    void AudioOutputDevice::ParameterChannels::OnSetValue(int i) throw (Exception) {
        ((AudioOutputDevice*)pDevice)->AcquireChannels(i);
    }

    String AudioOutputDevice::ParameterChannels::Name() {
        return "CHANNELS";
    }


// *************** AudioOutputDevice ***************
// *

    AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters)
        : EnginesReader(Engines) {
        this->Parameters = DriverParameters;
    }

    AudioOutputDevice::~AudioOutputDevice() {
        // delete all audio channels
        {
            std::vector<AudioChannel*>::iterator iter = Channels.begin();
            while (iter != Channels.end()) {
                delete *iter;
                iter++;
            }
            Channels.clear();
        }

        // delete all device parameters
        {
            std::map<String,DeviceCreationParameter*>::iterator iter = Parameters.begin();
            while (iter != Parameters.end()) {
                delete iter->second;
                iter++;
            }
            Parameters.clear();
        }
    }

    void AudioOutputDevice::Connect(Engine* pEngine) {
        std::set<Engine*>& engines = Engines.GetConfigForUpdate();
        if (engines.find(pEngine) == engines.end()) {
            engines.insert(pEngine);
            Engines.SwitchConfig().insert(pEngine);
            // make sure the engine knows about the connection
            //pEngine->Connect(this);
        }
    }

    void AudioOutputDevice::Disconnect(Engine* pEngine) {
        std::set<Engine*>& engines = Engines.GetConfigForUpdate();
        if (engines.find(pEngine) != engines.end()) { // if clause to prevent disconnect loop
            engines.erase(pEngine);
            Engines.SwitchConfig().erase(pEngine);
            // make sure the engine knows about the disconnection
            //pEngine->DisconnectAudioOutputDevice();
        }
    }

    AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) {
        return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL;
    }

    void AudioOutputDevice::AcquireChannels(uint Channels) {
        if (Channels > this->Channels.size()) {
            for (int c = this->Channels.size(); c < Channels; c++) {
                this->Channels.push_back(CreateChannel(c));
            }
        }
    }

    uint AudioOutputDevice::ChannelCount() {
        return Channels.size();
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::DeviceParameters() {
        return Parameters;
    }

    int AudioOutputDevice::RenderAudio(uint Samples) {
        if (Channels.empty()) return 0;

        // reset all channels with silence
        {
            std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
            std::vector<AudioChannel*>::iterator end          = Channels.end();
            for (; iterChannels != end; iterChannels++)
                (*iterChannels)->Clear(); // zero out audio buffer
        }

        int result = 0;

        // let all connected engines render audio for the current audio fragment cycle
        const std::set<Engine*>& engines = EnginesReader.Lock();
        #if CONFIG_RT_EXCEPTIONS
        try
        #endif // CONFIG_RT_EXCEPTIONS
        {
            std::set<Engine*>::iterator iterEngine = engines.begin();
            std::set<Engine*>::iterator end        = engines.end();
            for (; iterEngine != end; iterEngine++) {
                int res = (*iterEngine)->RenderAudio(Samples);
                if (res != 0) result = res;
            }
        }
        #if CONFIG_RT_EXCEPTIONS
        catch (std::runtime_error se) {
            std::cerr << "std::runtime_error: " << se.what() << std::endl << std::flush;
            exit(EXIT_FAILURE);
        }
        #endif // CONFIG_RT_EXCEPTIONS

        EnginesReader.Unlock();
        return result;
    }

    int AudioOutputDevice::RenderSilence(uint Samples) {
        if (Channels.empty()) return 0;

        // reset all channels with silence
        {
            std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
            std::vector<AudioChannel*>::iterator end          = Channels.end();
            for (; iterChannels != end; iterChannels++)
                (*iterChannels)->Clear(); // zero out audio buffer
        }

        return 0;
    }

} // namespace LinuxSampler
1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
7	* *
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 "AudioOutputDeviceFactory.h"
25	#include "AudioOutputDevice.h"
26	#include "../../common/global_private.h"
27
28	namespace LinuxSampler {
29
30	// ************* ParameterActive *************
31	// *
32
33	AudioOutputDevice::ParameterActive::ParameterActive() : DeviceCreationParameterBool() {
34	InitWithDefault();
35	}
36
37	AudioOutputDevice::ParameterActive::ParameterActive(String s) : DeviceCreationParameterBool(s) {
38	}
39
40	String AudioOutputDevice::ParameterActive::Description() {
41	return "Enable / disable device";
42	}
43
44	bool AudioOutputDevice::ParameterActive::Fix() {
45	return false;
46	}
47
48	bool AudioOutputDevice::ParameterActive::Mandatory() {
49	return false;
50	}
51
52	std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterActive::DependsAsParameters() {
53	return std::map<String,DeviceCreationParameter*>();
54	}
55
56	optional<bool> AudioOutputDevice::ParameterActive::DefaultAsBool(std::map<String,String> Parameters) {
57	return true;
58	}
59
60	void AudioOutputDevice::ParameterActive::OnSetValue(bool b) throw (Exception) {
61	if (b) ((AudioOutputDevice*)pDevice)->Play();
62	else ((AudioOutputDevice*)pDevice)->Stop();
63	}
64
65	String AudioOutputDevice::ParameterActive::Name() {
66	return "ACTIVE";
67	}
68
69
70
71	// ************* ParameterSampleRate *************
72	// *
73
74	AudioOutputDevice::ParameterSampleRate::ParameterSampleRate() : DeviceCreationParameterInt() {
75	InitWithDefault();
76	}
77
78	AudioOutputDevice::ParameterSampleRate::ParameterSampleRate(String s) : DeviceCreationParameterInt(s) {
79	}
80
81	String AudioOutputDevice::ParameterSampleRate::Description() {
82	return "Output sample rate";
83	}
84
85	bool AudioOutputDevice::ParameterSampleRate::Fix() {
86	return true;
87	}
88
89	bool AudioOutputDevice::ParameterSampleRate::Mandatory() {
90	return false;
91	}
92
93	std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterSampleRate::DependsAsParameters() {
94	return std::map<String,DeviceCreationParameter*>();
95	}
96
97	optional<int> AudioOutputDevice::ParameterSampleRate::DefaultAsInt(std::map<String,String> Parameters) {
98	return 44100;
99	}
100
101	optional<int> AudioOutputDevice::ParameterSampleRate::RangeMinAsInt(std::map<String,String> Parameters) {
102	return optional<int>::nothing;
103	}
104
105	optional<int> AudioOutputDevice::ParameterSampleRate::RangeMaxAsInt(std::map<String,String> Parameters) {
106	return optional<int>::nothing;
107	}
108
109	std::vector<int> AudioOutputDevice::ParameterSampleRate::PossibilitiesAsInt(std::map<String,String> Parameters) {
110	return std::vector<int>();
111	}
112
113	void AudioOutputDevice::ParameterSampleRate::OnSetValue(int i) throw (Exception) {
114	/* cannot happen, as parameter is fix */
115	}
116
117	String AudioOutputDevice::ParameterSampleRate::Name() {
118	return "SAMPLERATE";
119	}
120
121
122
123	// ************* ParameterChannels *************
124	// *
125
126	AudioOutputDevice::ParameterChannels::ParameterChannels() : DeviceCreationParameterInt() {
127	InitWithDefault();
128	}
129
130	AudioOutputDevice::ParameterChannels::ParameterChannels(String s) : DeviceCreationParameterInt(s) {
131	}
132
133	String AudioOutputDevice::ParameterChannels::Description() {
134	return "Number of output channels";
135	}
136
137	bool AudioOutputDevice::ParameterChannels::Fix() {
138	return false;
139	}
140
141	bool AudioOutputDevice::ParameterChannels::Mandatory() {
142	return false;
143	}
144
145	std::map<String,DeviceCreationParameter*> AudioOutputDevice::ParameterChannels::DependsAsParameters() {
146	return std::map<String,DeviceCreationParameter*>();
147	}
148
149	optional<int> AudioOutputDevice::ParameterChannels::DefaultAsInt(std::map<String,String> Parameters) {
150	return 2;
151	}
152
153	optional<int> AudioOutputDevice::ParameterChannels::RangeMinAsInt(std::map<String,String> Parameters) {
154	return 1;
155	}
156
157	optional<int> AudioOutputDevice::ParameterChannels::RangeMaxAsInt(std::map<String,String> Parameters) {
158	return 100;
159	}
160
161	std::vector<int> AudioOutputDevice::ParameterChannels::PossibilitiesAsInt(std::map<String,String> Parameters) {
162	return std::vector<int>();
163	}
164
165	void AudioOutputDevice::ParameterChannels::OnSetValue(int i) throw (Exception) {
166	((AudioOutputDevice*)pDevice)->AcquireChannels(i);
167	}
168
169	String AudioOutputDevice::ParameterChannels::Name() {
170	return "CHANNELS";
171	}
172
173
174
175	// ************* AudioOutputDevice *************
176	// *
177
178	AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters)
179	: EnginesReader(Engines) {
180	this->Parameters = DriverParameters;
181	}
182
183	AudioOutputDevice::~AudioOutputDevice() {
184	// delete all audio channels
185	{
186	std::vector<AudioChannel*>::iterator iter = Channels.begin();
187	while (iter != Channels.end()) {
188	delete *iter;
189	iter++;
190	}
191	Channels.clear();
192	}
193
194	// delete all device parameters
195	{
196	std::map<String,DeviceCreationParameter*>::iterator iter = Parameters.begin();
197	while (iter != Parameters.end()) {
198	delete iter->second;
199	iter++;
200	}
201	Parameters.clear();
202	}
203	}
204
205	void AudioOutputDevice::Connect(Engine* pEngine) {
206	std::set<Engine*>& engines = Engines.GetConfigForUpdate();
207	if (engines.find(pEngine) == engines.end()) {
208	engines.insert(pEngine);
209	Engines.SwitchConfig().insert(pEngine);
210	// make sure the engine knows about the connection
211	//pEngine->Connect(this);
212	}
213	}
214
215	void AudioOutputDevice::Disconnect(Engine* pEngine) {
216	std::set<Engine*>& engines = Engines.GetConfigForUpdate();
217	if (engines.find(pEngine) != engines.end()) { // if clause to prevent disconnect loop
218	engines.erase(pEngine);
219	Engines.SwitchConfig().erase(pEngine);
220	// make sure the engine knows about the disconnection
221	//pEngine->DisconnectAudioOutputDevice();
222	}
223	}
224
225	AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) {
226	return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL;
227	}
228
229	void AudioOutputDevice::AcquireChannels(uint Channels) {
230	if (Channels > this->Channels.size()) {
231	for (int c = this->Channels.size(); c < Channels; c++) {
232	this->Channels.push_back(CreateChannel(c));
233	}
234	}
235	}
236
237	uint AudioOutputDevice::ChannelCount() {
238	return Channels.size();
239	}
240
241	std::map<String,DeviceCreationParameter*> AudioOutputDevice::DeviceParameters() {
242	return Parameters;
243	}
244
245	int AudioOutputDevice::RenderAudio(uint Samples) {
246	if (Channels.empty()) return 0;
247
248	// reset all channels with silence
249	{
250	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
251	std::vector<AudioChannel*>::iterator end = Channels.end();
252	for (; iterChannels != end; iterChannels++)
253	(*iterChannels)->Clear(); // zero out audio buffer
254	}
255
256	int result = 0;
257
258	// let all connected engines render audio for the current audio fragment cycle
259	const std::set<Engine*>& engines = EnginesReader.Lock();
260	#if CONFIG_RT_EXCEPTIONS
261	try
262	#endif // CONFIG_RT_EXCEPTIONS
263	{
264	std::set<Engine*>::iterator iterEngine = engines.begin();
265	std::set<Engine*>::iterator end = engines.end();
266	for (; iterEngine != end; iterEngine++) {
267	int res = (*iterEngine)->RenderAudio(Samples);
268	if (res != 0) result = res;
269	}
270	}
271	#if CONFIG_RT_EXCEPTIONS
272	catch (std::runtime_error se) {
273	std::cerr << "std::runtime_error: " << se.what() << std::endl << std::flush;
274	exit(EXIT_FAILURE);
275	}
276	#endif // CONFIG_RT_EXCEPTIONS
277
278	EnginesReader.Unlock();
279	return result;
280	}
281
282	int AudioOutputDevice::RenderSilence(uint Samples) {
283	if (Channels.empty()) return 0;
284
285	// reset all channels with silence
286	{
287	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
288	std::vector<AudioChannel*>::iterator end = Channels.end();
289	for (; iterChannels != end; iterChannels++)
290	(*iterChannels)->Clear(); // zero out audio buffer
291	}
292
293	return 0;
294	}
295
296	} // namespace LinuxSampler