1#include "hw/hw.h"
2#include "console.h"
3#include "audio.h"
4
5typedef 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
16static 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
25static void wav_notify (void *opaque, audcnotification_e cmd)
26{
27 (void) opaque;
28 (void) cmd;
29}
30
31static 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
54static 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
62static void wav_capture_destroy (void *opaque)
63{
64 WAVState *wav = opaque;
65
66 AUD_del_capture (wav->cap, wav);
67}
68
69static void wav_capture_info (void *opaque)
70{
71 WAVState *wav = opaque;
72 char *path = wav->path;
73
74 term_printf ("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
79static struct capture_ops wav_capture_ops = {
80 .destroy = wav_capture_destroy,
81 .info = wav_capture_info
82};
83
84int wav_start_capture (CaptureState *s, const char *path, int freq,
85 int bits, int nchannels)
86{
87 WAVState *wav;
88 uint8_t hdr[] = {
89 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
90 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
91 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
92 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
93 };
94 struct audsettings as;
95 struct audio_capture_ops ops;
96 int stereo, bits16, shift;
97 CaptureVoiceOut *cap;
98
99 if (bits != 8 && bits != 16) {
100 term_printf ("incorrect bit count %d, must be 8 or 16\n", bits);
101 return -1;
102 }
103
104 if (nchannels != 1 && nchannels != 2) {
105 term_printf ("incorrect channel count %d, must be 1 or 2\n",
106 nchannels);
107 return -1;
108 }
109
110 stereo = nchannels == 2;
111 bits16 = bits == 16;
112
113 as.freq = freq;
114 as.nchannels = 1 << stereo;
115 as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8;
116 as.endianness = 0;
117
118 ops.notify = wav_notify;
119 ops.capture = wav_capture;
120 ops.destroy = wav_destroy;
121
122 wav = qemu_mallocz (sizeof (*wav));
123
124 shift = bits16 + stereo;
125 hdr[34] = bits16 ? 0x10 : 0x08;
126
127 le_store (hdr + 22, as.nchannels, 2);
128 le_store (hdr + 24, freq, 4);
129 le_store (hdr + 28, freq << shift, 4);
130 le_store (hdr + 32, 1 << shift, 2);
131
132 wav->f = qemu_fopen (path, "wb");
133 if (!wav->f) {
134 term_printf ("Failed to open wave file `%s'\nReason: %s\n",
135 path, strerror (errno));
136 qemu_free (wav);
137 return -1;
138 }
139
140 wav->path = qemu_strdup (path);
141 wav->bits = bits;
142 wav->nchannels = nchannels;
143 wav->freq = freq;
144
145 qemu_put_buffer (wav->f, hdr, sizeof (hdr));
146
147 cap = AUD_add_capture (NULL, &as, &ops, wav);
148 if (!cap) {
149 term_printf ("Failed to add audio capture\n");
150 qemu_free (wav->path);
151 qemu_fclose (wav->f);
152 qemu_free (wav);
153 return -1;
154 }
155
156 wav->cap = cap;
157 s->opaque = wav;
158 s->ops = wav_capture_ops;
159 return 0;
160}
161
