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
|
/*******************************************************************************
* Goggles Audio Player Library *
********************************************************************************
* Copyright (C) 2010-2021 by Sander Jansen. All Rights Reserved *
* --- *
* 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 3 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, see http://www.gnu.org/licenses. *
********************************************************************************/
// Building a plugin
#define GAP_PLUGIN 1
#include "ap_defs.h"
#include "ap_output_plugin.h"
using namespace ap;
namespace ap {
class WavOutput : public OutputPlugin {
protected:
FXFile file;
FXlong data_pos = 0;
public:
WavOutput(OutputContext * ctx);
FXchar type() const override { return DeviceWav; }
FXbool configure(const AudioFormat &) override;
FXbool write(const void*, FXuint) override;
void drop() override {}
void drain() override {}
void pause(FXbool) override {}
void close() override;
virtual ~WavOutput();
};
WavOutput::WavOutput(OutputContext * ctx) : OutputPlugin(ctx) {
}
WavOutput::~WavOutput() {
close();
}
enum {
WAV_FORMAT_PCM = 0x0001,
WAV_FORMAT_FLOAT = 0x0003,
//WAV_FORMAT_EXTENSIBLE = 0xFFFE
};
///FIXME perhaps support extensible wav format
FXbool WavOutput::configure(const AudioFormat & fmt) {
FXushort format;
// Can't handle big endian yet, neither does the output thread handle byteorder swaps
if (fmt.byteorder() != Format::Little)
return false;
// Extensible Wav Format not yet supported
if (fmt.channels>2)
return false;
// Determine format
switch(fmt.datatype()) {
case Format::Unsigned :
case Format::Signed : format = WAV_FORMAT_PCM; break;
case Format::Float : format = WAV_FORMAT_FLOAT; break;
default : return false; break;
}
FXString path=FXPath::unique("gap.wav");
if (file.open(path,FXIO::Writing)) {
GM_DEBUG_PRINT("[wav] opened output file: %s\n",path.text());
af=fmt;
FXuint chunksize=0;
FXlong ldata=0;
/// riff chunk
file.writeBlock("RIFF",4);
file.writeBlock(&chunksize,4); // empty for now
file.writeBlock("WAVE",4);
/// junk chunk
chunksize=28;
file.writeBlock("JUNK",4);
file.writeBlock(&chunksize,4);
file.writeBlock(&ldata,8);
file.writeBlock(&ldata,8);
file.writeBlock(&ldata,8);
chunksize=0;
file.writeBlock(&chunksize,4);
/// fmt
file.writeBlock("fmt ",4);
chunksize=16;
file.writeBlock(&chunksize,4);
file.writeBlock(&format,2);
FXushort channels=fmt.channels;
FXuint rate=fmt.rate;
FXuint byterate=fmt.rate*fmt.channels*fmt.packing();
FXushort blockalign=fmt.framesize();
FXushort bitspersample=fmt.bps();
file.writeBlock(&channels,2);
file.writeBlock(&rate,4);
file.writeBlock(&byterate,4);
file.writeBlock(&blockalign,2);
file.writeBlock(&bitspersample,2);
file.writeBlock("data",4);
chunksize=0xFFFFFFFF;
data_pos=file.position();
file.writeBlock(&chunksize,4);
return true;
}
GM_DEBUG_PRINT("[wav] failed to open output file: %s\n",path.text());
return false;
}
FXbool WavOutput::write(const void * data,FXuint nframes) {
FXlong duration = (nframes*NANOSECONDS_PER_SECOND) / af.rate;
FXThread::sleep(duration);
if (!file.isOpen() || file.writeBlock(data,af.framesize()*nframes)!=af.framesize()*nframes)
return false;
else
return true;
}
void WavOutput::close() {
if (file.isOpen()) {
GM_DEBUG_PRINT("[wav] closed output\n");
FXulong end=file.position();
FXulong size;
FXuint size32=0xFFFFFFFF;
size=end-8;
if (end>0xFFFFFFFF) {
// RIFF Chunk
file.position(0);
file.writeBlock("RF64",4);
file.writeBlock(&size32,4);
// DS64 Chunk
file.position(12);
file.writeBlock("ds64",4);
file.position(20);
file.writeBlock(&size,8);
// Data Chunk
if (data_pos) {
size=end-data_pos-4;
file.writeBlock(&size,8);
size=0;
file.writeBlock(&size,8);
}
}
else {
/// RIFF chunksize
size32=size;
file.position(4);
file.writeBlock(&size32,4);
// Data Chunksize
if (data_pos) {
file.position(data_pos);
size=end-data_pos-4;
file.writeBlock(&size,4);
}
}
file.close();
}
af.reset();
}
}
AP_IMPLEMENT_PLUGIN(WavOutput);
|
