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
|
#include "hw/hw.h"
#include "monitor/monitor.h"
#include "audio.h"
typedef struct {
FILE *f;
int bytes;
char *path;
int freq;
int bits;
int nchannels;
CaptureVoiceOut *cap;
} WAVState;
/* VICE code: Store number as little endian. */
static void le_store (uint8_t *buf, uint32_t val, int len)
{
int i;
for (i = 0; i < len; i++) {
buf[i] = (uint8_t) (val & 0xff);
val >>= 8;
}
}
static void wav_notify (void *opaque, audcnotification_e cmd)
{
(void) opaque;
(void) cmd;
}
static void wav_destroy (void *opaque)
{
WAVState *wav = opaque;
uint8_t rlen[4];
uint8_t dlen[4];
uint32_t datalen = wav->bytes;
uint32_t rifflen = datalen + 36;
Monitor *mon = cur_mon;
if (wav->f) {
le_store (rlen, rifflen, 4);
le_store (dlen, datalen, 4);
if (fseek (wav->f, 4, SEEK_SET)) {
monitor_printf (mon, "wav_destroy: rlen fseek failed\nReason: %s\n",
strerror (errno));
goto doclose;
}
if (fwrite (rlen, 4, 1, wav->f) != 1) {
monitor_printf (mon, "wav_destroy: rlen fwrite failed\nReason %s\n",
strerror (errno));
goto doclose;
}
if (fseek (wav->f, 32, SEEK_CUR)) {
monitor_printf (mon, "wav_destroy: dlen fseek failed\nReason %s\n",
strerror (errno));
goto doclose;
}
if (fwrite (dlen, 1, 4, wav->f) != 4) {
monitor_printf (mon, "wav_destroy: dlen fwrite failed\nReason %s\n",
strerror (errno));
goto doclose;
}
doclose:
if (fclose (wav->f)) {
fprintf (stderr, "wav_destroy: fclose failed: %s",
strerror (errno));
}
}
g_free (wav->path);
}
static void wav_capture (void *opaque, void *buf, int size)
{
WAVState *wav = opaque;
if (fwrite (buf, size, 1, wav->f) != 1) {
monitor_printf (cur_mon, "wav_capture: fwrite error\nReason: %s",
strerror (errno));
}
wav->bytes += size;
}
static void wav_capture_destroy (void *opaque)
{
WAVState *wav = opaque;
AUD_del_capture (wav->cap, wav);
}
static void wav_capture_info (void *opaque)
{
WAVState *wav = opaque;
char *path = wav->path;
monitor_printf (cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
wav->freq, wav->bits, wav->nchannels,
path ? path : "<not available>", wav->bytes);
}
static struct capture_ops wav_capture_ops = {
.destroy = wav_capture_destroy,
.info = wav_capture_info
};
int wav_start_capture (CaptureState *s, const char *path, int freq,
int bits, int nchannels)
{
Monitor *mon = cur_mon;
WAVState *wav;
uint8_t hdr[] = {
0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
};
struct audsettings as;
struct audio_capture_ops ops;
int stereo, bits16, shift;
CaptureVoiceOut *cap;
if (bits != 8 && bits != 16) {
monitor_printf (mon, "incorrect bit count %d, must be 8 or 16\n", bits);
return -1;
}
if (nchannels != 1 && nchannels != 2) {
monitor_printf (mon, "incorrect channel count %d, must be 1 or 2\n",
nchannels);
return -1;
}
stereo = nchannels == 2;
bits16 = bits == 16;
as.freq = freq;
as.nchannels = 1 << stereo;
as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8;
as.endianness = 0;
ops.notify = wav_notify;
ops.capture = wav_capture;
ops.destroy = wav_destroy;
wav = g_malloc0 (sizeof (*wav));
shift = bits16 + stereo;
hdr[34] = bits16 ? 0x10 : 0x08;
le_store (hdr + 22, as.nchannels, 2);
le_store (hdr + 24, freq, 4);
le_store (hdr + 28, freq << shift, 4);
le_store (hdr + 32, 1 << shift, 2);
wav->f = fopen (path, "wb");
if (!wav->f) {
monitor_printf (mon, "Failed to open wave file `%s'\nReason: %s\n",
path, strerror (errno));
g_free (wav);
return -1;
}
wav->path = g_strdup (path);
wav->bits = bits;
wav->nchannels = nchannels;
wav->freq = freq;
if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
monitor_printf (mon, "Failed to write header\nReason: %s\n",
strerror (errno));
goto error_free;
}
cap = AUD_add_capture (&as, &ops, wav);
if (!cap) {
monitor_printf (mon, "Failed to add audio capture\n");
goto error_free;
}
wav->cap = cap;
s->opaque = wav;
s->ops = wav_capture_ops;
return 0;
error_free:
g_free (wav->path);
if (fclose (wav->f)) {
monitor_printf (mon, "Failed to close wave file\nReason: %s\n",
strerror (errno));
}
g_free (wav);
return -1;
}
|
