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 "AudioOutputDevice.h"

namespace LinuxSampler {

    AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters) {
//FIXME: Is this is redundant?
#if 0
        if (!DriverParameters["active"])     DriverParameters["active"]     = new ParameterActive(this);
        if (!DriverParameters["samplerate"]) DriverParameters["samplerate"] = new ParameterSampleRate(this);
        if (!DriverParameters["channels"])   DriverParameters["channels"]   = new ParameterChannels(this);
#endif
        this->Parameters = DriverParameters;
    }

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

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::AvailableParameters() {
        static const std::map<String,DeviceCreationParameter*> available_parameters = CreateAvailableParameters();
        return available_parameters;
    }

    std::map<String,DeviceCreationParameter*> AudioOutputDevice::CreateAvailableParameters() {
        static ParameterActive     param_active(NULL);
        static ParameterSampleRate param_samplerate(NULL);
        static ParameterChannels   param_channels(NULL);
        std::map<String,DeviceCreationParameter*> result;
        result["active"]     = &param_active;
        result["samplerate"] = &param_samplerate;
        result["channels"]   = &param_channels;
        return result;
    }

    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 "AudioOutputDevice.h"
24
25	namespace LinuxSampler {
26
27	AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters) {
28	//FIXME: Is this is redundant?
29	#if 0
30	if (!DriverParameters["active"]) DriverParameters["active"] = new ParameterActive(this);
31	if (!DriverParameters["samplerate"]) DriverParameters["samplerate"] = new ParameterSampleRate(this);
32	if (!DriverParameters["channels"]) DriverParameters["channels"] = new ParameterChannels(this);
33	#endif
34	this->Parameters = DriverParameters;
35	}
36
37	AudioOutputDevice::~AudioOutputDevice() {
38	std::map<String,DeviceCreationParameter*>::iterator iter = Parameters.begin();
39	while (iter != Parameters.end()) {
40	Parameters.erase(iter);
41	delete iter->second;
42	iter++;
43	}
44	}
45
46	std::map<String,DeviceCreationParameter*> AudioOutputDevice::AvailableParameters() {
47	static const std::map<String,DeviceCreationParameter*> available_parameters = CreateAvailableParameters();
48	return available_parameters;
49	}
50
51	std::map<String,DeviceCreationParameter*> AudioOutputDevice::CreateAvailableParameters() {
52	static ParameterActive param_active(NULL);
53	static ParameterSampleRate param_samplerate(NULL);
54	static ParameterChannels param_channels(NULL);
55	std::map<String,DeviceCreationParameter*> result;
56	result["active"] = &param_active;
57	result["samplerate"] = &param_samplerate;
58	result["channels"] = &param_channels;
59	return result;
60	}
61
62	void AudioOutputDevice::Connect(Engine* pEngine) {
63	if (Engines.find(pEngine) == Engines.end()) {
64	pEngine->Connect(this);
65	Engines.insert(pEngine);
66	}
67	}
68
69	void AudioOutputDevice::Disconnect(Engine* pEngine) {
70	if (Engines.find(pEngine) != Engines.end()) { // if clause to prevent disconnect loop
71	Engines.erase(pEngine);
72	pEngine->DisconnectAudioOutputDevice();
73	}
74	}
75
76	AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) {
77	return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL;
78	}
79
80	std::map<String,DeviceCreationParameter*> AudioOutputDevice::DeviceParameters() {
81	return Parameters;
82	}
83
84	int AudioOutputDevice::RenderAudio(uint Samples) {
85	if (Channels.empty()) return 0;
86
87	// reset all channels with silence
88	{
89	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
90	std::vector<AudioChannel*>::iterator end = Channels.end();
91	for (; iterChannels != end; iterChannels++)
92	(*iterChannels)->Clear(); // zero out audio buffer
93	}
94
95	int result = 0;
96
97	// let all connected engines render audio for the current audio fragment cycle
98	{
99	std::set<Engine*>::iterator iterEngine = Engines.begin();
100	std::set<Engine*>::iterator end = Engines.end();
101	for (; iterEngine != end; iterEngine++) {
102	int res = (*iterEngine)->RenderAudio(Samples);
103	if (res != 0) result = res;
104	}
105	}
106
107	return result;
108	}
109
110	int AudioOutputDevice::RenderSilence(uint Samples) {
111	if (Channels.empty()) return 0;
112
113	// reset all channels with silence
114	{
115	std::vector<AudioChannel*>::iterator iterChannels = Channels.begin();
116	std::vector<AudioChannel*>::iterator end = Channels.end();
117	for (; iterChannels != end; iterChannels++)
118	(*iterChannels)->Clear(); // zero out audio buffer
119	}
120
121	return 0;
122	}
123
124	} // namespace LinuxSampler