root / audio / wavcapture.c @ 376253ec
History | View | Annotate | Download (3.8 kB)
1 |
#include "hw/hw.h" |
---|---|
2 |
#include "monitor.h" |
3 |
#include "audio.h" |
4 |
|
5 |
typedef struct { |
6 |
QEMUFile *f; |
7 |
int bytes;
|
8 |
char *path;
|
9 |
int freq;
|
10 |
int bits;
|
11 |
int nchannels;
|
12 |
CaptureVoiceOut *cap; |
13 |
} WAVState; |
14 |
|
15 |
/* VICE code: Store number as little endian. */
|
16 |
static void le_store (uint8_t *buf, uint32_t val, int len) |
17 |
{ |
18 |
int i;
|
19 |
for (i = 0; i < len; i++) { |
20 |
buf[i] = (uint8_t) (val & 0xff);
|
21 |
val >>= 8;
|
22 |
} |
23 |
} |
24 |
|
25 |
static void wav_notify (void *opaque, audcnotification_e cmd) |
26 |
{ |
27 |
(void) opaque;
|
28 |
(void) cmd;
|
29 |
} |
30 |
|
31 |
static void wav_destroy (void *opaque) |
32 |
{ |
33 |
WAVState *wav = opaque; |
34 |
uint8_t rlen[4];
|
35 |
uint8_t dlen[4];
|
36 |
uint32_t datalen = wav->bytes; |
37 |
uint32_t rifflen = datalen + 36;
|
38 |
|
39 |
if (wav->f) {
|
40 |
le_store (rlen, rifflen, 4);
|
41 |
le_store (dlen, datalen, 4);
|
42 |
|
43 |
qemu_fseek (wav->f, 4, SEEK_SET);
|
44 |
qemu_put_buffer (wav->f, rlen, 4);
|
45 |
|
46 |
qemu_fseek (wav->f, 32, SEEK_CUR);
|
47 |
qemu_put_buffer (wav->f, dlen, 4);
|
48 |
qemu_fclose (wav->f); |
49 |
} |
50 |
|
51 |
qemu_free (wav->path); |
52 |
} |
53 |
|
54 |
static void wav_capture (void *opaque, void *buf, int size) |
55 |
{ |
56 |
WAVState *wav = opaque; |
57 |
|
58 |
qemu_put_buffer (wav->f, buf, size); |
59 |
wav->bytes += size; |
60 |
} |
61 |
|
62 |
static void wav_capture_destroy (void *opaque) |
63 |
{ |
64 |
WAVState *wav = opaque; |
65 |
|
66 |
AUD_del_capture (wav->cap, wav); |
67 |
} |
68 |
|
69 |
static void wav_capture_info (void *opaque) |
70 |
{ |
71 |
WAVState *wav = opaque; |
72 |
char *path = wav->path;
|
73 |
|
74 |
monitor_printf(cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
|
75 |
wav->freq, wav->bits, wav->nchannels, |
76 |
path ? path : "<not available>", wav->bytes);
|
77 |
} |
78 |
|
79 |
static struct capture_ops wav_capture_ops = { |
80 |
.destroy = wav_capture_destroy, |
81 |
.info = wav_capture_info |
82 |
}; |
83 |
|
84 |
int wav_start_capture (CaptureState *s, const char *path, int freq, |
85 |
int bits, int nchannels) |
86 |
{ |
87 |
Monitor *mon = cur_mon; |
88 |
WAVState *wav; |
89 |
uint8_t hdr[] = { |
90 |
0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
91 |
0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
92 |
0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
93 |
0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
94 |
}; |
95 |
struct audsettings as;
|
96 |
struct audio_capture_ops ops;
|
97 |
int stereo, bits16, shift;
|
98 |
CaptureVoiceOut *cap; |
99 |
|
100 |
if (bits != 8 && bits != 16) { |
101 |
monitor_printf(mon, "incorrect bit count %d, must be 8 or 16\n", bits);
|
102 |
return -1; |
103 |
} |
104 |
|
105 |
if (nchannels != 1 && nchannels != 2) { |
106 |
monitor_printf(mon, "incorrect channel count %d, must be 1 or 2\n",
|
107 |
nchannels); |
108 |
return -1; |
109 |
} |
110 |
|
111 |
stereo = nchannels == 2;
|
112 |
bits16 = bits == 16;
|
113 |
|
114 |
as.freq = freq; |
115 |
as.nchannels = 1 << stereo;
|
116 |
as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8; |
117 |
as.endianness = 0;
|
118 |
|
119 |
ops.notify = wav_notify; |
120 |
ops.capture = wav_capture; |
121 |
ops.destroy = wav_destroy; |
122 |
|
123 |
wav = qemu_mallocz (sizeof (*wav));
|
124 |
|
125 |
shift = bits16 + stereo; |
126 |
hdr[34] = bits16 ? 0x10 : 0x08; |
127 |
|
128 |
le_store (hdr + 22, as.nchannels, 2); |
129 |
le_store (hdr + 24, freq, 4); |
130 |
le_store (hdr + 28, freq << shift, 4); |
131 |
le_store (hdr + 32, 1 << shift, 2); |
132 |
|
133 |
wav->f = qemu_fopen (path, "wb");
|
134 |
if (!wav->f) {
|
135 |
monitor_printf(mon, "Failed to open wave file `%s'\nReason: %s\n",
|
136 |
path, strerror (errno)); |
137 |
qemu_free (wav); |
138 |
return -1; |
139 |
} |
140 |
|
141 |
wav->path = qemu_strdup (path); |
142 |
wav->bits = bits; |
143 |
wav->nchannels = nchannels; |
144 |
wav->freq = freq; |
145 |
|
146 |
qemu_put_buffer (wav->f, hdr, sizeof (hdr));
|
147 |
|
148 |
cap = AUD_add_capture (NULL, &as, &ops, wav);
|
149 |
if (!cap) {
|
150 |
monitor_printf(mon, "Failed to add audio capture\n");
|
151 |
qemu_free (wav->path); |
152 |
qemu_fclose (wav->f); |
153 |
qemu_free (wav); |
154 |
return -1; |
155 |
} |
156 |
|
157 |
wav->cap = cap; |
158 |
s->opaque = wav; |
159 |
s->ops = wav_capture_ops; |
160 |
return 0; |
161 |
} |