/[svn]/linuxsampler/trunk/src/audiodriver/AudioChannel.cpp
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Contents of /linuxsampler/trunk/src/audiodriver/AudioChannel.cpp

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Revision 123 - (show annotations) (download)
Mon Jun 14 19:33:16 2004 UTC (19 years, 10 months ago) by schoenebeck
File size: 4709 byte(s) 
* src/common: added template class 'optional<>' which can be used e.g. as
  return type whenever a value might be returned, but don't has to; this
  template class pretty much acts like a pointer of the given type, but is
  much more safer than a simple pointer
* src/audiodriver: added static class AudioDeviceFactory to create audio
  devices at runtime by using a string and to obtain driver informations
  of drivers at runtime, driver classes should simply use the macro
  REGISTER_AUDIO_OUTPUT_DRIVER(DriverName,DriverClass) in their cpp file
  to register the driver to LinuxSampler (no changes needed anymore in the
  LS code to add a new audio output driver)
* src/drivers: added classes to dynamically manage driver parameters; there
  are two different kinds of parameters: parameters which are need to
  create a new device (DeviceCreationParameterX) used to e.g. create an
  audio output device or a MIDI input device and parameters which are only
  available at runtime, means when a device is already created
  (DeviceRuntimeParameterX) which will be e.g. used as audio channel
  parameters and MIDI port parameters
* src/linuxsampler.cpp: all registered audio output drivers will be shown
  on the console on startup
* src/network: implemented configuration of audio output devices via LSCP
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 "AudioChannel.h"
24
25 namespace LinuxSampler {
26
27 /**
28 * Create real channel.
29 *
30 * @param BufferSize - desired audio data buffer size
31 * @param Name - arbitrary name for this channel (optional)
32 */
33 AudioChannel::AudioChannel(uint BufferSize, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {
34 this->pBuffer = new float[BufferSize];
35 this->uiBufferSize = BufferSize;
36 this->pMixChannel = NULL;
37 this->UsesExternalBuffer = false;
38
39 if (!ChannelParameters["NAME"]) ChannelParameters["Name"] = new ParameterName(Name);
40 if (!ChannelParameters["IS_MIX_CHANNEL"]) ChannelParameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
41 this->mParameters = ChannelParameters;
42
43 Clear();
44 }
45
46 /**
47 * Create channel with external (already existing) audio buffer.
48 *
49 * @param pBuffer - external audio buffer
50 * @param BufferSIze - size of the external buffer
51 * @param Name - arbitrary name for this channel (optional)
52 */
53 AudioChannel::AudioChannel(float* pBuffer, uint BufferSize, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {
54 this->pBuffer = pBuffer;
55 this->uiBufferSize = BufferSize;
56 this->pMixChannel = NULL;
57 this->UsesExternalBuffer = true;
58
59 if (!ChannelParameters["NAME"]) ChannelParameters["Name"] = new ParameterName(Name);
60 if (!ChannelParameters["IS_MIX_CHANNEL"]) ChannelParameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
61
62 Clear();
63 }
64
65 /**
66 * Create mix channel.
67 *
68 * @param pMixChannel - the real channel this new mix channel refers to
69 * @param Name - arbitrary name for this channel (optional)
70 */
71 AudioChannel::AudioChannel(AudioChannel* pMixChannel, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {
72 this->pBuffer = pMixChannel->Buffer();
73 this->uiBufferSize = pMixChannel->uiBufferSize;
74 this->pMixChannel = pMixChannel;
75 this->UsesExternalBuffer = true;
76
77 if (!ChannelParameters["NAME"]) ChannelParameters["Name"] = new ParameterName(Name);
78 if (!ChannelParameters["IS_MIX_CHANNEL"]) ChannelParameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(true);
79 //TODO: if (!ChannelParameters["MIX_CHANNEL_DESTINATION"]) ChannelParameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan);
80
81 Clear();
82 }
83
84 /**
85 * Destructor
86 */
87 AudioChannel::~AudioChannel() {
88 std::map<String,DeviceRuntimeParameter*>::iterator iter = mParameters.begin();
89 while (iter != mParameters.end()) delete iter->second;
90 if (!UsesExternalBuffer) delete[] pBuffer;
91 }
92
93 std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() {
94 return mParameters;
95 }
96 }
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