| 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 |
void AudioOutputDevice::Connect(Engine* pEngine) { |
| 28 |
if (Engines.find(pEngine) == Engines.end()) { |
| 29 |
pEngine->Connect(this); |
| 30 |
Engines.insert(pEngine); |
| 31 |
} |
| 32 |
} |
| 33 |
|
| 34 |
void AudioOutputDevice::Disconnect(Engine* pEngine) { |
| 35 |
if (Engines.find(pEngine) != Engines.end()) { // if clause to prevent disconnect loop |
| 36 |
Engines.erase(pEngine); |
| 37 |
pEngine->DisconnectAudioOutputDevice(); |
| 38 |
} |
| 39 |
} |
| 40 |
|
| 41 |
AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) { |
| 42 |
return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL; |
| 43 |
} |
| 44 |
|
| 45 |
int AudioOutputDevice::RenderAudio(uint Samples) { |
| 46 |
if (Channels.empty()) return 0; |
| 47 |
|
| 48 |
// reset all channels with silence |
| 49 |
{ |
| 50 |
std::vector<AudioChannel*>::iterator iterChannels = Channels.begin(); |
| 51 |
std::vector<AudioChannel*>::iterator end = Channels.end(); |
| 52 |
for (; iterChannels != end; iterChannels++) |
| 53 |
(*iterChannels)->Clear(); // zero out audio buffer |
| 54 |
} |
| 55 |
|
| 56 |
int result = 0; |
| 57 |
|
| 58 |
// let all connected engines render audio for the current audio fragment cycle |
| 59 |
{ |
| 60 |
std::set<Engine*>::iterator iterEngine = Engines.begin(); |
| 61 |
std::set<Engine*>::iterator end = Engines.end(); |
| 62 |
for (; iterEngine != end; iterEngine++) { |
| 63 |
int res = (*iterEngine)->RenderAudio(Samples); |
| 64 |
if (res != 0) result = res; |
| 65 |
} |
| 66 |
} |
| 67 |
|
| 68 |
return result; |
| 69 |
} |
| 70 |
|
| 71 |
int AudioOutputDevice::RenderSilence(uint Samples) { |
| 72 |
if (Channels.empty()) return 0; |
| 73 |
|
| 74 |
// reset all channels with silence |
| 75 |
{ |
| 76 |
std::vector<AudioChannel*>::iterator iterChannels = Channels.begin(); |
| 77 |
std::vector<AudioChannel*>::iterator end = Channels.end(); |
| 78 |
for (; iterChannels != end; iterChannels++) |
| 79 |
(*iterChannels)->Clear(); // zero out audio buffer |
| 80 |
} |
| 81 |
|
| 82 |
return 0; |
| 83 |
} |
| 84 |
|
| 85 |
} // namespace LinuxSampler |
Parent Directory
| 
Revision Log