src/audiodriver/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 {

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

    AudioOutputDevice::~AudioOutputDevice() {
        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;
    }

    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	AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters) {
29	this->Parameters = DriverParameters;
30	}
31
32	AudioOutputDevice::~AudioOutputDevice() {
33	std::map<String,DeviceCreationParameter*>::iterator iter = Parameters.begin();
34	while (iter != Parameters.end()) {
35	Parameters.erase(iter);
36	delete iter->second;
37	iter++;
38	}
39	}
40
41	void AudioOutputDevice::Connect(Engine* pEngine) {
42	if (Engines.find(pEngine) == Engines.end()) {
43	pEngine->Connect(this);
44	Engines.insert(pEngine);
45	}
46	}
47
48	void AudioOutputDevice::Disconnect(Engine* pEngine) {
49	if (Engines.find(pEngine) != Engines.end()) { // if clause to prevent disconnect loop
50	Engines.erase(pEngine);
51	pEngine->DisconnectAudioOutputDevice();
52	}
53	}
54
55	AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) {
56	return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL;
57	}
58
59	std::map<String,DeviceCreationParameter*> AudioOutputDevice::DeviceParameters() {
60	return Parameters;
61	}
62
63	int AudioOutputDevice::RenderAudio(uint Samples) {
64	if (Channels.empty()) return 0;
65
66	// reset all channels with silence
67	{
68	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
69	std::vector<AudioChannel*>::iterator end = Channels.end();
70	for (; iterChannels != end; iterChannels++)
71	(*iterChannels)->Clear(); // zero out audio buffer
72	}
73
74	int result = 0;
75
76	// let all connected engines render audio for the current audio fragment cycle
77	{
78	std::set<Engine*>::iterator iterEngine = Engines.begin();
79	std::set<Engine*>::iterator end = Engines.end();
80	for (; iterEngine != end; iterEngine++) {
81	int res = (*iterEngine)->RenderAudio(Samples);
82	if (res != 0) result = res;
83	}
84	}
85
86	return result;
87	}
88
89	int AudioOutputDevice::RenderSilence(uint Samples) {
90	if (Channels.empty()) return 0;
91
92	// reset all channels with silence
93	{
94	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
95	std::vector<AudioChannel*>::iterator end = Channels.end();
96	for (; iterChannels != end; iterChannels++)
97	(*iterChannels)->Clear(); // zero out audio buffer
98	}
99
100	return 0;
101	}
102
103	} // namespace LinuxSampler