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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "AudioOutputDevice.h" |
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|
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namespace LinuxSampler { |
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|
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AudioOutputDevice::AudioOutputDevice(std::map<String,DeviceCreationParameter*> DriverParameters) { |
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if (!DriverParameters["ACTIVE"]) DriverParameters["ACTIVE"] = new ParameterActive(this); |
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if (!DriverParameters["SAMPLERATE"]) DriverParameters["SAMPLERATE"] = new ParameterSampleRate(this); |
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if (!DriverParameters["CHANNELS"]) DriverParameters["CHANNELS"] = new ParameterChannels(this); |
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this->Parameters = DriverParameters; |
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} |
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|
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AudioOutputDevice::~AudioOutputDevice() { |
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std::map<String,DeviceCreationParameter*>::iterator iter = Parameters.begin(); |
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while (iter != Parameters.end()) { |
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delete iter->second; |
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Parameters.erase(iter); |
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} |
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} |
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|
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std::map<String,DeviceCreationParameter*> AudioOutputDevice::AvailableParameters() { |
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static const std::map<String,DeviceCreationParameter*> available_parameters = CreateAvailableParameters(); |
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return available_parameters; |
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} |
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|
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std::map<String,DeviceCreationParameter*> AudioOutputDevice::CreateAvailableParameters() { |
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static ParameterActive param_active(NULL); |
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static ParameterSampleRate param_samplerate(NULL); |
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static ParameterChannels param_channels(NULL); |
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std::map<String,DeviceCreationParameter*> result; |
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result["ACTIVE"] = ¶m_active; |
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result["SAMPLERATE"] = ¶m_samplerate; |
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result["CHANNELS"] = ¶m_channels; |
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return result; |
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} |
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|
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void AudioOutputDevice::Connect(Engine* pEngine) { |
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if (Engines.find(pEngine) == Engines.end()) { |
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pEngine->Connect(this); |
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Engines.insert(pEngine); |
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} |
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} |
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|
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void AudioOutputDevice::Disconnect(Engine* pEngine) { |
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if (Engines.find(pEngine) != Engines.end()) { // if clause to prevent disconnect loop |
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Engines.erase(pEngine); |
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pEngine->DisconnectAudioOutputDevice(); |
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} |
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} |
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|
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AudioChannel* AudioOutputDevice::Channel(uint ChannelIndex) { |
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return (ChannelIndex < Channels.size()) ? Channels[ChannelIndex] : NULL; |
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} |
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|
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std::map<String,DeviceCreationParameter*> AudioOutputDevice::DeviceParameters() { |
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return Parameters; |
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} |
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|
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int AudioOutputDevice::RenderAudio(uint Samples) { |
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if (Channels.empty()) return 0; |
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|
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// reset all channels with silence |
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{ |
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std::vector<AudioChannel*>::iterator iterChannels = Channels.begin(); |
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std::vector<AudioChannel*>::iterator end = Channels.end(); |
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for (; iterChannels != end; iterChannels++) |
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(*iterChannels)->Clear(); // zero out audio buffer |
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} |
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|
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int result = 0; |
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|
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// let all connected engines render audio for the current audio fragment cycle |
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{ |
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std::set<Engine*>::iterator iterEngine = Engines.begin(); |
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std::set<Engine*>::iterator end = Engines.end(); |
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for (; iterEngine != end; iterEngine++) { |
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int res = (*iterEngine)->RenderAudio(Samples); |
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if (res != 0) result = res; |
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} |
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} |
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|
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return result; |
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} |
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|
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int AudioOutputDevice::RenderSilence(uint Samples) { |
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if (Channels.empty()) return 0; |
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|
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// reset all channels with silence |
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{ |
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std::vector<AudioChannel*>::iterator iterChannels = Channels.begin(); |
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std::vector<AudioChannel*>::iterator end = Channels.end(); |
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for (; iterChannels != end; iterChannels++) |
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(*iterChannels)->Clear(); // zero out audio buffer |
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} |
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|
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return 0; |
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} |
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|
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} // namespace LinuxSampler |