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
|
/***************************************************************************
playeralsa.h - description
-------------------
begin : Wed Feb 20 2002
copyright : (C) 2002 by Tue and Ken Haste Andersen
email :
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#ifndef PLAYERALSA_H
#define PLAYERALSA_H
/**
*@author Tue and Ken Haste Andersen, Peter Chang
*/
#ifndef PLAYERTEST
#include "player.h"
#else
// some definitions to avoid using player.h in test mode
#include <math.h>
#include <qstring.h>
#include <qstringlist.h>
typedef float CSAMPLE; // defines the CSAMPLE type used for intermediate calculations
#endif
#include <qregexp.h>
#include <qthread.h>
#include <alsa/asoundlib.h>
/**
* there are two independent defines S16_OUTPUT and DIRECT_OUTPUT
* 1) S16_OUTPUT makes the class output short integers to ALSA
* 2) DIRECT_OUTPUT uses mmapped output
*
* NB by default, these are not defined and so the class uses floats via the
* plug plugin. Defining S16_OUTPUT allows the bare hw to be used (via surround40).
* XXX: Mmapped output doesn't seem to work with the plug plugin...
*/
#ifndef PLAYERTEST
class PlayerALSA : public Player, public QThread {
public:
PlayerALSA(ConfigObject<ConfigValue> *config);
#else
class PlayerALSA : public QThread {
public:
PlayerALSA();
#endif
~PlayerALSA();
bool initialize();
bool open();
void close();
void setDefaults();
QStringList getInterfaces();
QStringList getSampleRates();
static QString getSoundApi();
QString getSoundApiName() { return getSoundApi(); };
/** Satisfy virtual declaration in EngineObject */
void process(const CSAMPLE *, const CSAMPLE *, const int) {};
/** Main loop of player. Executed in a separate thread by QT */
void run();
protected:
/** ALSA parameters */
snd_pcm_t *handle;
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t period_size;
unsigned int period_no;
bool isformatfloat;
/** True if devices are open */
bool isopen;
/** Channels used for each output from Mixxx. Set to -1 when not in use */
int max_channels;
int masterleft, masterright, headleft, headright;
#ifdef PLAYERTEST
CSAMPLE *prepareBuffer(int nframes);
#endif
int setPeriodSize(bool setMinimum);
int set_hwparams();
int set_swparams();
int xrun_recovery(int err);
bool twrite; // flag for thread
private:
static const snd_pcm_access_t alsa_access = SND_PCM_ACCESS_RW_INTERLEAVED;
static const int alsa_channels = 4;
static const int default_latency = 200;
};
#endif
|
