drivers/audio/AudioOutputDevice.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and 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"

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 (LinuxSamplerException) {
        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 (LinuxSamplerException) {
        /* 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 optional<int>::nothing;
    }

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

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

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

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


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

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

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

        }

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

    void AudioOutputDevice::Connect(Engine* pEngine) {
        if (Engines.find(pEngine) == Engines.end()) {
            pEngine->Connect(this);
            Engines.insert(pEngine);
        }
    }

    void AudioOutputDevice::Disconnect(Engine* pEngine) {
        if (Engines.find(pEngine) != Engines.end()) { // if clause to prevent disconnect loop
            Engines.erase(pEngine);
            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));
            }
        }
    }

    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
        {
            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;
            }
        }

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