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
|
// sgi_dac.h
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
// Converter subclass for the Silicon Graphics Indy and Indigo workstation
// D-to-A converters.
#ifndef SGI_DAC_H
#ifdef __GNUG__
#pragma interface
#endif
#define SGI_DAC_H
extern "C" {
#include <audio.h>
#include <audiofile.h>
}
#include "converter.h"
#include "localdefs.h"
class Action;
class StatusAction;
class SGIConverter : public RealConverter {
typedef RealConverter Super;
public:
enum InputSource { Mike = 0x1, Line = 0x2, Digital = 0x4 };
SGIConverter();
virtual ~SGIConverter();
redefined int configure(Sound *sound, GoingTo);
redefined int pause();
redefined int resume();
redefined int stop();
redefined int currentPlayLevel() const;
redefined int currentRecordLevel() const;
redefined boolean setPlayLevel(int volume);
redefined boolean setRecordLevel(int volume);
redefined boolean setSpeakerOutput(boolean);
redefined DataType bestPlayableType() { return ShortData; }
int setInputSource(InputSource);
protected:
redefined boolean isPlayableFormat(DataType type);
redefined int doConfigure();
redefined int doConversion(StatusAction* askedToStop);
redefined int doRecording(StatusAction* askedToStop);
redefined int waitForStop(StatusAction *);
redefined int checkSampleRate(int rate);
redefined int checkChannels(int chans);
redefined int checkDataType(DataType);
redefined void catchSignals(boolean);
redefined void ignoreSignals(boolean);
InputSource currentInputSource();
class SGIConfigRequester : public RealConverter::ConfigRequester {
public:
SGIConfigRequester(RealConverter* cvtr) : ConfigRequester(cvtr) {}
protected:
redefined void configureRequest(Request *);
redefined boolean confirmValues();
private:
ChoiceValue source;
ChoiceValue polite;
};
friend void SGIConfigRequester::configureRequest(Request *);
redefined Requester* configRequester() {
return new SGIConfigRequester(this);
}
friend class Controller;
private:
int getDefaults();
void resetDefaults();
int initialize();
int displayError();
int sampleSize(); // size of each sample in bytes
long bestQueueSize(); // converter queue size in samples
long writeSamps(); // size of write buffer in samples
long readSamps(); // size of read buffer in samples
char* convertToSigned(char *, char*, long); // converts unsigned chars to signed
long getParameter(long param) const;
int setParameter(long param, LONG value);
int lockMemory();
int unlockMemory();
private:
static void signalExit(...);
static void signalIgnore(...);
static void signalQuit(...);
private:
long pvbuf[16];
ALconfig audio_port_config;
ALport audio_port;
static char* errorStrings[];
static boolean dontInterrupt; // true: do not play if cvtr in use
};
#endif
|
