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 {

    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	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 "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