/usr/include/svxlink/AsyncAudioProcessor.h is in libasyncaudio-dev 14.08.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | /**
@file AsyncAudioProcessor.h
@brief The base class for an audio processor class
@author Tobias Blomberg / SM0SVX
@date 2006-04-23
\verbatim
Async - A library for programming event driven applications
Copyright (C) 2003-2008 Tobias Blomberg / SM0SVX
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
\endverbatim
*/
#ifndef ASYNC_AUDIO_PROCESSOR_INCLUDED
#define ASYNC_AUDIO_PROCESSOR_INCLUDED
/****************************************************************************
*
* System Includes
*
****************************************************************************/
#include <string>
/****************************************************************************
*
* Project Includes
*
****************************************************************************/
/****************************************************************************
*
* Local Includes
*
****************************************************************************/
#include <AsyncAudioSource.h>
#include <AsyncAudioSink.h>
/****************************************************************************
*
* Forward declarations
*
****************************************************************************/
/****************************************************************************
*
* Namespace
*
****************************************************************************/
namespace Async
{
/****************************************************************************
*
* Forward declarations of classes inside of the declared namespace
*
****************************************************************************/
/****************************************************************************
*
* Defines & typedefs
*
****************************************************************************/
/****************************************************************************
*
* Exported Global Variables
*
****************************************************************************/
/****************************************************************************
*
* Class definitions
*
****************************************************************************/
/**
@brief The base class for an audio processor
@author Tobias Blomberg / SM0SVX
@date 2006-04-23
This class is the base class for an audio processor. An audio processor is
a class that is both an audio sink and source. It receives samples, process
them in some way and send them further down the chain.
*/
class AudioProcessor : public AudioSink, public AudioSource
{
public:
/**
* @brief Default constuctor
*/
AudioProcessor(void);
/**
* @brief Destructor
*/
virtual ~AudioProcessor(void);
/**
* @brief Write audio to the filter
* @param samples The buffer containing the samples
* @param len The number of samples in the buffer
* @return Return the number of samples processed
*/
int writeSamples(const float *samples, int len);
/**
* @brief Order a flush of all samples
*/
void flushSamples(void);
/**
* @brief Resume output to the sink if previously stopped
*/
void resumeOutput(void);
/**
* @brief All samples have been flushed by the sink
*/
void allSamplesFlushed(void);
protected:
/**
* @brief Set the input and output sample rates
* @param input_rate The input sample rate
* @param output_rate The output sample rate
*/
void setInputOutputSampleRate(int input_rate, int output_rate);
/**
* @brief Process incoming samples and put them into the output buffer
* @param dest Destination buffer
* @param src Source buffer
* @param count Number of samples in the source buffer
*
* This function should be reimplemented by the inheriting class to
* do the actual processing of the incoming samples. All samples must
* be processed, otherwise they are lost and the output buffer will
* contain garbage.
*/
virtual void processSamples(float *dest, const float *src, int count) = 0;
private:
static const int BUFSIZE = 256;
float buf[BUFSIZE];
int buf_cnt;
bool do_flush;
bool input_stopped;
bool output_stopped;
int input_rate;
int output_rate;
float *input_buf;
int input_buf_cnt;
int input_buf_size;
AudioProcessor(const AudioProcessor&);
AudioProcessor& operator=(const AudioProcessor&);
void writeFromBuf(void);
}; /* class AudioProcessor */
} /* namespace */
#endif /* ASYNC_AUDIO_PROCESSOR_INCLUDED */
/*
* This file has not been truncated
*/
|