/[svn]/linuxsampler/trunk/src/drivers/audio/AudioChannel.cpp
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Diff of /linuxsampler/trunk/src/drivers/audio/AudioChannel.cpp

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revision 200 by schoenebeck, Tue Jul 13 22:04:16 2004 UTC revision 1004 by schoenebeck, Thu Dec 28 18:05:14 2006 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 22  Line 23 
23    
24  #include "AudioChannel.h"  #include "AudioChannel.h"
25    
26    #if defined(__APPLE__)
27    # include <stdlib.h>
28    #else
29    # include <malloc.h>
30    #endif
31    
32    
33  namespace LinuxSampler {  namespace LinuxSampler {
34    
35      /**      /**
36       * Create real channel.       * Create real channel.
37       *       *
38         * @param ChannelNr  - channel number of this new channel
39       * @param BufferSize - desired audio data buffer size       * @param BufferSize - desired audio data buffer size
      * @param Name       - arbitrary name for this channel (optional)  
40       */       */
41      AudioChannel::AudioChannel(uint BufferSize, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {      AudioChannel::AudioChannel(uint ChannelNr, uint BufferSize) {
42          this->pBuffer            = new float[BufferSize];          this->ChannelNr          = ChannelNr;
43            #if defined(__APPLE__)
44            this->pBuffer            = (float *) malloc(BufferSize*sizeof(float));
45            #else
46            this->pBuffer            = (float *) memalign(16,BufferSize*sizeof(float));
47            #endif
48          this->uiBufferSize       = BufferSize;          this->uiBufferSize       = BufferSize;
49          this->pMixChannel        = NULL;          this->pMixChannel        = NULL;
50          this->UsesExternalBuffer = false;          this->UsesExternalBuffer = false;
51    
52          if (!ChannelParameters["Name"])           ChannelParameters["Name"]           = new ParameterName(Name);          Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
53          if (!ChannelParameters["IS_MIX_CHANNEL"]) ChannelParameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);          Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
         this->mParameters = ChannelParameters;  
54    
55          Clear();          Clear();
56      }      }
# Line 46  namespace LinuxSampler { Line 58  namespace LinuxSampler {
58      /**      /**
59       * Create channel with external (already existing) audio buffer.       * Create channel with external (already existing) audio buffer.
60       *       *
61         * @param ChannelNr  - channel number of this new channel
62       * @param pBuffer    - external audio buffer       * @param pBuffer    - external audio buffer
63       * @param BufferSIze - size of the external buffer       * @param BufferSIze - size of the external buffer
      * @param Name       - arbitrary name for this channel (optional)  
64       */       */
65      AudioChannel::AudioChannel(float* pBuffer, uint BufferSize, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {      AudioChannel::AudioChannel(uint ChannelNr, float* pBuffer, uint BufferSize) {
66            this->ChannelNr          = ChannelNr;
67          this->pBuffer            = pBuffer;          this->pBuffer            = pBuffer;
68          this->uiBufferSize       = BufferSize;          this->uiBufferSize       = BufferSize;
69          this->pMixChannel        = NULL;          this->pMixChannel        = NULL;
70          this->UsesExternalBuffer = true;          this->UsesExternalBuffer = true;
71    
72          if (!ChannelParameters["Name"])           ChannelParameters["Name"]           = new ParameterName(Name);          Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
73          if (!ChannelParameters["IS_MIX_CHANNEL"]) ChannelParameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);          Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
74    
75          Clear();          Clear();
76      }      }
# Line 65  namespace LinuxSampler { Line 78  namespace LinuxSampler {
78      /**      /**
79       * Create mix channel.       * Create mix channel.
80       *       *
81       * @param pMixChannel - the real channel this new mix channel refers to       * @param ChannelNr              - channel number of this new channel
82       * @param Name        - arbitrary name for this channel (optional)       * @param pMixChannelDestination - a real audio channel this new mix
83         *                                 channel refers to
84       */       */
85      AudioChannel::AudioChannel(AudioChannel* pMixChannel, String Name, std::map<String,DeviceRuntimeParameter*> ChannelParameters) {      AudioChannel::AudioChannel(uint ChannelNr, AudioChannel* pMixChannelDestination) {
86          this->pBuffer            = pMixChannel->Buffer();          this->ChannelNr          = ChannelNr;
87          this->uiBufferSize       = pMixChannel->uiBufferSize;          this->pBuffer            = pMixChannelDestination->Buffer();
88          this->pMixChannel        = pMixChannel;          this->uiBufferSize       = pMixChannelDestination->uiBufferSize;
89            this->pMixChannel        = pMixChannelDestination;
90          this->UsesExternalBuffer = true;          this->UsesExternalBuffer = true;
91    
92          if (!ChannelParameters["Name"])                    ChannelParameters["Name"]                    = new ParameterName(Name);          Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
93          if (!ChannelParameters["IS_MIX_CHANNEL"])          ChannelParameters["IS_MIX_CHANNEL"]          = new ParameterIsMixChannel(true);          Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(true);
94          //TODO: if (!ChannelParameters["MIX_CHANNEL_DESTINATION"]) ChannelParameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan);          //TODO: Parameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan);
95    
96          Clear();          Clear();
97      }      }
# Line 85  namespace LinuxSampler { Line 100  namespace LinuxSampler {
100       * Destructor       * Destructor
101       */       */
102      AudioChannel::~AudioChannel() {      AudioChannel::~AudioChannel() {
103          std::map<String,DeviceRuntimeParameter*>::iterator iter = mParameters.begin();          std::map<String,DeviceRuntimeParameter*>::iterator iter = Parameters.begin();
104          while (iter != mParameters.end()) { delete iter->second; iter++; }          while (iter != Parameters.end()) { delete iter->second; iter++; }
105          if (!UsesExternalBuffer)          delete[] pBuffer;          if (!UsesExternalBuffer) free(pBuffer);
106        }
107    
108        /**
109         * Copies audio data (unmodified) from this AudioChannel to the given
110         * destination AudioChannel.
111         *
112         * @param pDst    - destination channel
113         * @param Samples - amount of sample points to be copied
114         */
115        void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples) {
116            memcpy(pDst->Buffer(), Buffer(), Samples * sizeof(float));
117        }
118    
119        /**
120         * Copies audio data from this AudioChannel to the given destination
121         * AudioChannel and applies the given volume coefficient to the
122         * destination audio signal.
123         *
124         * @param pDst    - destination channel
125         * @param Samples - amount of sample points to be copied
126         * @param fLevel  - volume coefficient to be applied
127         */
128        void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples, const float fLevel) {
129            if (fLevel == 1.0f) CopyTo(pDst, Samples);
130            else {
131                float* pSrcBuf = Buffer();
132                float* pDstBuf = pDst->Buffer();
133                for (int i = 0; i < Samples; i++)
134                    pDstBuf[i] = pSrcBuf[i] * fLevel;
135            }
136      }      }
137    
138      std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() {      std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() {
139          return mParameters;          return Parameters;
140      }      }
141  }  }
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