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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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* Copyright (C) 2005, 2006 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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#include "AudioChannel.h" |
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#if defined(__APPLE__) |
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# include <stdlib.h> |
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#else |
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# include <malloc.h> |
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#endif |
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namespace LinuxSampler { |
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/** |
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* Create real channel. |
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* |
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* @param ChannelNr - channel number of this new channel |
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* @param BufferSize - desired audio data buffer size |
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*/ |
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AudioChannel::AudioChannel(uint ChannelNr, uint BufferSize) { |
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this->ChannelNr = ChannelNr; |
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#if defined(__APPLE__) |
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this->pBuffer = (float *) malloc(BufferSize*sizeof(float)); |
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#else |
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this->pBuffer = (float *) memalign(16,BufferSize*sizeof(float)); |
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#endif |
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this->uiBufferSize = BufferSize; |
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this->pMixChannel = NULL; |
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this->UsesExternalBuffer = false; |
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Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr)); |
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Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false); |
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Clear(); |
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} |
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/** |
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* Create channel with external (already existing) audio buffer. |
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* |
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* @param ChannelNr - channel number of this new channel |
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* @param pBuffer - external audio buffer |
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* @param BufferSIze - size of the external buffer |
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*/ |
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AudioChannel::AudioChannel(uint ChannelNr, float* pBuffer, uint BufferSize) { |
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this->ChannelNr = ChannelNr; |
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this->pBuffer = pBuffer; |
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this->uiBufferSize = BufferSize; |
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this->pMixChannel = NULL; |
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this->UsesExternalBuffer = true; |
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Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr)); |
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Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false); |
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Clear(); |
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} |
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/** |
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* Create mix channel. |
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* |
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* @param ChannelNr - channel number of this new channel |
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* @param pMixChannelDestination - a real audio channel this new mix |
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* channel refers to |
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*/ |
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AudioChannel::AudioChannel(uint ChannelNr, AudioChannel* pMixChannelDestination) { |
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this->ChannelNr = ChannelNr; |
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this->pBuffer = pMixChannelDestination->Buffer(); |
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this->uiBufferSize = pMixChannelDestination->uiBufferSize; |
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this->pMixChannel = pMixChannelDestination; |
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this->UsesExternalBuffer = true; |
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Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr)); |
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Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(true); |
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//TODO: Parameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan); |
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Clear(); |
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} |
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/** |
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* Destructor |
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*/ |
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AudioChannel::~AudioChannel() { |
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std::map<String,DeviceRuntimeParameter*>::iterator iter = Parameters.begin(); |
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while (iter != Parameters.end()) { delete iter->second; iter++; } |
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if (!UsesExternalBuffer) free(pBuffer); |
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} |
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/** |
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* Copies audio data (unmodified) from this AudioChannel to the given |
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* destination AudioChannel. |
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* |
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* @param pDst - destination channel |
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* @param Samples - amount of sample points to be copied |
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*/ |
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void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples) { |
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memcpy(pDst->Buffer(), Buffer(), Samples * sizeof(float)); |
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} |
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/** |
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* Copies audio data from this AudioChannel to the given destination |
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* AudioChannel and applies the given volume coefficient to the |
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* destination audio signal. |
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* |
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* @param pDst - destination channel |
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* @param Samples - amount of sample points to be copied |
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* @param fLevel - volume coefficient to be applied |
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*/ |
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void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples, const float fLevel) { |
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if (fLevel == 1.0f) CopyTo(pDst, Samples); |
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else { |
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float* pSrcBuf = Buffer(); |
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float* pDstBuf = pDst->Buffer(); |
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for (int i = 0; i < Samples; i++) |
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pDstBuf[i] = pSrcBuf[i] * fLevel; |
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} |
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} |
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std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() { |
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return Parameters; |
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} |
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} |