drivers/audio/AudioChannel.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "AudioChannel.h"

#include "../../common/global_private.h"
#include "../../common/Thread.h" // needed for allocAlignedMem() and freeAlignedMem()

#if defined(__APPLE__)
# include <stdlib.h>
#else
# include <malloc.h>
#endif


namespace LinuxSampler {

    /**
     * Create real channel.
     *
     * @param ChannelNr  - channel number of this new channel
     * @param BufferSize - desired audio data buffer size
     */
    AudioChannel::AudioChannel(uint ChannelNr, uint BufferSize) {
        this->ChannelNr          = ChannelNr;
        this->pBuffer            = (float *) Thread::allocAlignedMem(16,BufferSize*sizeof(float));
        this->uiBufferSize       = BufferSize;
        this->pMixChannel        = NULL;
        this->UsesExternalBuffer = false;

        Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
        Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);

        Clear();
    }

    /**
     * Create channel with external (already existing) audio buffer.
     *
     * @param ChannelNr  - channel number of this new channel
     * @param pBuffer    - external audio buffer
     * @param BufferSize - size of the external buffer
     */
    AudioChannel::AudioChannel(uint ChannelNr, float* pBuffer, uint BufferSize) {
        this->ChannelNr          = ChannelNr;
        this->pBuffer            = pBuffer;
        this->uiBufferSize       = BufferSize;
        this->pMixChannel        = NULL;
        this->UsesExternalBuffer = true;

        Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
        Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);

        Clear();
    }

    /**
     * Create mix channel.
     *
     * @param ChannelNr              - channel number of this new channel
     * @param pMixChannelDestination - a real audio channel this new mix
     *                                 channel refers to
     */
    AudioChannel::AudioChannel(uint ChannelNr, AudioChannel* pMixChannelDestination) {
        this->ChannelNr          = ChannelNr;
        this->pBuffer            = pMixChannelDestination->Buffer();
        this->uiBufferSize       = pMixChannelDestination->uiBufferSize;
        this->pMixChannel        = pMixChannelDestination;
        this->UsesExternalBuffer = true;

        Parameters["NAME"]           = new ParameterName("Channel " + ToString(ChannelNr));
        Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(true);
        //TODO: Parameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan);

        Clear();
    }

    /**
     * Destructor
     */
    AudioChannel::~AudioChannel() {
        std::map<String,DeviceRuntimeParameter*>::iterator iter = Parameters.begin();
        while (iter != Parameters.end()) { delete iter->second; iter++; }
        if (!UsesExternalBuffer) Thread::freeAlignedMem(pBuffer);
    }

    /**
     * Copies audio data (unmodified) from this AudioChannel to the given
     * destination AudioChannel.
     *
     * @e Caution: This method will overwrite the content in the destination
     * channel buffer.
     *
     * @param pDst    - destination channel
     * @param Samples - amount of sample points to be copied
     */
    void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples) {
        memcpy(pDst->Buffer(), Buffer(), Samples * sizeof(float));
    }

    /**
     * Copies audio data from this AudioChannel to the given destination
     * AudioChannel and applies the given volume coefficient to the
     * destination audio signal.
     *
     * @e Caution: This method will overwrite the content in the destination
     * channel buffer.
     *
     * @param pDst    - destination channel
     * @param Samples - amount of sample points to be copied
     * @param fLevel  - volume coefficient to be applied
     */
    void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples, const float fLevel) {
        if (fLevel == 1.0f) CopyTo(pDst, Samples);
        else {
            float* pSrcBuf = Buffer();
            float* pDstBuf = pDst->Buffer();
            for (int i = 0; i < Samples; i++)
                pDstBuf[i] = pSrcBuf[i] * fLevel;
        }
    }

    /**
     * Copies audio data (unmodified) from this AudioChannel and mixes it to the
     * given destination AudioChannel.
     *
     * @param pDst    - destination channel
     * @param Samples - amount of sample points to be mixed over
     */
    void AudioChannel::MixTo(AudioChannel* pDst, const uint Samples) {
        //TODO: there's probably a more efficient way to do this ...
        float* pSrcBuf = Buffer();
        float* pDstBuf = pDst->Buffer();
        for (int i = 0; i < Samples; i++)
            pDstBuf[i] += pSrcBuf[i];
    }

    /**
     * Copies audio data from this AudioChannel, applies the given volume
     * coefficient to the audio signal and mixes it to the given destination
     * channel.
     *
     * @param pDst    - destination channel
     * @param Samples - amount of sample points to be mixed over
     * @param fLevel  - volume coefficient to be applied
     */
    void AudioChannel::MixTo(AudioChannel* pDst, const uint Samples, const float fLevel) {
        if (fLevel == 1.0f) MixTo(pDst, Samples);
        else {
            float* pSrcBuf = Buffer();
            float* pDstBuf = pDst->Buffer();
            for (int i = 0; i < Samples; i++)
                pDstBuf[i] += pSrcBuf[i] * fLevel;
        }
    }

    std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() {
        return Parameters;
    }
}
1	schoenebeck	200	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	1037	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
7	schoenebeck	200	* *
8			* 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 *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "AudioChannel.h"
25
26	schoenebeck	1424	#include "../../common/global_private.h"
27	senoner	1481	#include "../../common/Thread.h" // needed for allocAlignedMem() and freeAlignedMem()
28	schoenebeck	1424
29	schoenebeck	361	#if defined(__APPLE__)
30			# include <stdlib.h>
31			#else
32			# include <malloc.h>
33			#endif
34
35
36	schoenebeck	200	namespace LinuxSampler {
37
38			/**
39			* Create real channel.
40			*
41	schoenebeck	226	* @param ChannelNr - channel number of this new channel
42	schoenebeck	200	* @param BufferSize - desired audio data buffer size
43			*/
44	schoenebeck	226	AudioChannel::AudioChannel(uint ChannelNr, uint BufferSize) {
45			this->ChannelNr = ChannelNr;
46	senoner	1481	this->pBuffer = (float ) Thread::allocAlignedMem(16,BufferSizesizeof(float));
47	schoenebeck	200	this->uiBufferSize = BufferSize;
48			this->pMixChannel = NULL;
49			this->UsesExternalBuffer = false;
50
51	schoenebeck	226	Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr));
52			Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
53	schoenebeck	200
54			Clear();
55			}
56
57			/**
58			* Create channel with external (already existing) audio buffer.
59			*
60	schoenebeck	226	* @param ChannelNr - channel number of this new channel
61	schoenebeck	200	* @param pBuffer - external audio buffer
62	schoenebeck	1424	* @param BufferSize - size of the external buffer
63	schoenebeck	200	*/
64	schoenebeck	226	AudioChannel::AudioChannel(uint ChannelNr, float* pBuffer, uint BufferSize) {
65			this->ChannelNr = ChannelNr;
66	schoenebeck	200	this->pBuffer = pBuffer;
67			this->uiBufferSize = BufferSize;
68			this->pMixChannel = NULL;
69			this->UsesExternalBuffer = true;
70
71	schoenebeck	226	Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr));
72			Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(false);
73	schoenebeck	200
74			Clear();
75			}
76
77			/**
78			* Create mix channel.
79			*
80	schoenebeck	226	* @param ChannelNr - channel number of this new channel
81			* @param pMixChannelDestination - a real audio channel this new mix
82			* channel refers to
83	schoenebeck	200	*/
84	schoenebeck	226	AudioChannel::AudioChannel(uint ChannelNr, AudioChannel* pMixChannelDestination) {
85			this->ChannelNr = ChannelNr;
86	senkov	331	this->pBuffer = pMixChannelDestination->Buffer();
87			this->uiBufferSize = pMixChannelDestination->uiBufferSize;
88			this->pMixChannel = pMixChannelDestination;
89	schoenebeck	200	this->UsesExternalBuffer = true;
90
91	schoenebeck	226	Parameters["NAME"] = new ParameterName("Channel " + ToString(ChannelNr));
92			Parameters["IS_MIX_CHANNEL"] = new ParameterIsMixChannel(true);
93			//TODO: Parameters["MIX_CHANNEL_DESTINATION"] = new ParameterMixChannelDestination(dest_chan);
94	schoenebeck	200
95			Clear();
96			}
97
98			/**
99			* Destructor
100			*/
101			AudioChannel::~AudioChannel() {
102	schoenebeck	226	std::map<String,DeviceRuntimeParameter*>::iterator iter = Parameters.begin();
103			while (iter != Parameters.end()) { delete iter->second; iter++; }
104	senoner	1481	if (!UsesExternalBuffer) Thread::freeAlignedMem(pBuffer);
105	schoenebeck	200	}
106
107	schoenebeck	1001	/**
108			* Copies audio data (unmodified) from this AudioChannel to the given
109			* destination AudioChannel.
110			*
111	schoenebeck	1037	* @e Caution: This method will overwrite the content in the destination
112			* channel buffer.
113			*
114	schoenebeck	1001	* @param pDst - destination channel
115			* @param Samples - amount of sample points to be copied
116			*/
117			void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples) {
118	schoenebeck	1004	memcpy(pDst->Buffer(), Buffer(), Samples * sizeof(float));
119	schoenebeck	1001	}
120
121			/**
122			* Copies audio data from this AudioChannel to the given destination
123			* AudioChannel and applies the given volume coefficient to the
124			* destination audio signal.
125			*
126	schoenebeck	1037	* @e Caution: This method will overwrite the content in the destination
127			* channel buffer.
128			*
129	schoenebeck	1001	* @param pDst - destination channel
130			* @param Samples - amount of sample points to be copied
131			* @param fLevel - volume coefficient to be applied
132			*/
133			void AudioChannel::CopyTo(AudioChannel* pDst, const uint Samples, const float fLevel) {
134			if (fLevel == 1.0f) CopyTo(pDst, Samples);
135			else {
136			float* pSrcBuf = Buffer();
137			float* pDstBuf = pDst->Buffer();
138			for (int i = 0; i < Samples; i++)
139			pDstBuf[i] = pSrcBuf[i] * fLevel;
140			}
141			}
142
143	schoenebeck	1037	/**
144			* Copies audio data (unmodified) from this AudioChannel and mixes it to the
145			* given destination AudioChannel.
146			*
147			* @param pDst - destination channel
148			* @param Samples - amount of sample points to be mixed over
149			*/
150			void AudioChannel::MixTo(AudioChannel* pDst, const uint Samples) {
151			//TODO: there's probably a more efficient way to do this ...
152			float* pSrcBuf = Buffer();
153			float* pDstBuf = pDst->Buffer();
154			for (int i = 0; i < Samples; i++)
155			pDstBuf[i] += pSrcBuf[i];
156			}
157
158			/**
159			* Copies audio data from this AudioChannel, applies the given volume
160			* coefficient to the audio signal and mixes it to the given destination
161			* channel.
162			*
163			* @param pDst - destination channel
164			* @param Samples - amount of sample points to be mixed over
165			* @param fLevel - volume coefficient to be applied
166			*/
167			void AudioChannel::MixTo(AudioChannel* pDst, const uint Samples, const float fLevel) {
168			if (fLevel == 1.0f) MixTo(pDst, Samples);
169			else {
170			float* pSrcBuf = Buffer();
171			float* pDstBuf = pDst->Buffer();
172			for (int i = 0; i < Samples; i++)
173			pDstBuf[i] += pSrcBuf[i] * fLevel;
174			}
175			}
176
177	schoenebeck	200	std::map<String,DeviceRuntimeParameter*> AudioChannel::ChannelParameters() {
178	schoenebeck	226	return Parameters;
179	schoenebeck	200	}
180			}