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
|
/*
Copyright (C) 2000 Stefan Westerfeld
[email protected]
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#ifdef HAVE_LIBAUDIOFILE
#include "soundserver.h"
#include "cachedwav.h"
#include "stdsynthmodule.h"
#include "convert.h"
#include "debug.h"
#include <math.h>
using namespace std;
using namespace Arts;
class WavPlayObject_impl :public WavPlayObject_skel, public StdSynthModule {
protected:
CachedWav *wav;
double flpos;
poState _state;
int sampleCount()
{
if(!wav) return 0;
return wav->bufferSize / wav->channelCount / (wav->sampleWidth/8);
}
public:
/*
* construction, destruction
*/
WavPlayObject_impl() :wav(0), flpos(0.0), _state(posIdle)
{
arts_debug("WavPlayObject_impl");
}
virtual ~WavPlayObject_impl()
{
arts_debug("~WavPlayObject_impl");
if(wav) wav->decRef();
}
/*
* KMedia2 private interface
*/
bool loadMedia(const string &filename) {
arts_debug("Wav: loadMedia %s", filename.c_str());
wav = CachedWav::load(Cache::the(), filename);
return (wav != 0);
}
/*
* KMedia2 interface
*/
string description() {
return "no description (see " __FILE__ ")";
}
poTime currentTime() {
if(!wav) return poTime(0,0,0,"samples");
float timesec = flpos / (float)wav->samplingRate;
float timems = (timesec - floor(timesec)) * 1000.0;
return poTime( int( timesec ), int( timems ), (int)flpos, "samples" );
}
poTime overallTime() {
float timesec = (float)sampleCount() / (float)wav->samplingRate;
float timems = (timesec - floor(timesec)) * 1000.0;
return poTime( int( timesec ), int( timems ), sampleCount(), "samples" );
}
poCapabilities capabilities() {
return static_cast<poCapabilities>(capPause+capSeek);
}
string mediaName() {
return wav ? wav->mediaName() : "";
}
poState state() {
return _state;
}
void play() {
_state = posPlaying;
}
void halt() {
_state = posIdle;
flpos = 0.0;
}
void seek(const class poTime &newTime) {
if(!wav) return;
float fnewsamples = -1;
if(newTime.seconds != -1 && newTime.ms != -1)
{
float flnewtime = (float)newTime.seconds+((float)newTime.ms/1000.0);
fnewsamples = flnewtime * (float)wav->samplingRate;
}
else if(newTime.custom >= 0 && newTime.customUnit == "samples")
{
fnewsamples = newTime.custom;
}
if(fnewsamples > (float)sampleCount())
fnewsamples = (float)sampleCount();
if(fnewsamples >= 0) flpos = fnewsamples;
}
void pause() {
arts_debug("pause");
_state = posPaused;
}
void calculateBlock(unsigned long samples) {
unsigned long haveSamples = 0;
if(wav && _state == posPlaying)
{
double speed = wav->samplingRate / samplingRateFloat;
haveSamples = uni_convert_stereo_2float(samples, wav->buffer,
wav->bufferSize,wav->channelCount,wav->sampleWidth,
left,right,speed,flpos);
flpos += (double)haveSamples * speed;
}
if(haveSamples != samples)
{
unsigned long i;
for(i=haveSamples;i<samples;i++)
left[i] = right[i] = 0.0;
if(_state == posPlaying) {
_state = posIdle;
flpos = 0.0;
}
}
}
};
REGISTER_IMPLEMENTATION(WavPlayObject_impl);
#endif
|
