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1.1 root 1: #include "vl.h"
2:
3: typedef struct {
4: QEMUFile *f;
5: int bytes;
6: char *path;
7: int freq;
8: int bits;
9: int nchannels;
10: CaptureVoiceOut *cap;
11: } WAVState;
12:
13: /* VICE code: Store number as little endian. */
14: static void le_store (uint8_t *buf, uint32_t val, int len)
15: {
16: int i;
17: for (i = 0; i < len; i++) {
18: buf[i] = (uint8_t) (val & 0xff);
19: val >>= 8;
20: }
21: }
22:
23: static void wav_notify (void *opaque, audcnotification_e cmd)
24: {
25: (void) opaque;
26: (void) cmd;
27: }
28:
29: static void wav_destroy (void *opaque)
30: {
31: WAVState *wav = opaque;
32: uint8_t rlen[4];
33: uint8_t dlen[4];
34: uint32_t datalen = wav->bytes;
35: uint32_t rifflen = datalen + 36;
36:
37: if (!wav->f) {
38: return;
39: }
40:
41: le_store (rlen, rifflen, 4);
42: le_store (dlen, datalen, 4);
43:
44: qemu_fseek (wav->f, 4, SEEK_SET);
45: qemu_put_buffer (wav->f, rlen, 4);
46:
47: qemu_fseek (wav->f, 32, SEEK_CUR);
48: qemu_put_buffer (wav->f, dlen, 4);
49: fclose (wav->f);
50: if (wav->path) {
51: qemu_free (wav->path);
52: }
53: }
54:
55: static void wav_capture (void *opaque, void *buf, int size)
56: {
57: WAVState *wav = opaque;
58:
59: qemu_put_buffer (wav->f, buf, size);
60: wav->bytes += size;
61: }
62:
63: static void wav_capture_destroy (void *opaque)
64: {
65: WAVState *wav = opaque;
66:
67: AUD_del_capture (wav->cap, wav);
68: }
69:
70: static void wav_capture_info (void *opaque)
71: {
72: WAVState *wav = opaque;
73: char *path = wav->path;
74:
75: term_printf ("Capturing audio(%d,%d,%d) to %s: %d bytes\n",
76: wav->freq, wav->bits, wav->nchannels,
77: path ? path : "<not available>", wav->bytes);
78: }
79:
80: static struct capture_ops wav_capture_ops = {
81: .destroy = wav_capture_destroy,
82: .info = wav_capture_info
83: };
84:
85: int wav_start_capture (CaptureState *s, const char *path, int freq,
86: int bits, int nchannels)
87: {
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: audsettings_t as;
96: struct audio_capture_ops ops;
97: int stereo, bits16, shift;
98: CaptureVoiceOut *cap;
99:
100: if (bits != 8 && bits != 16) {
101: term_printf ("incorrect bit count %d, must be 8 or 16\n", bits);
102: return -1;
103: }
104:
105: if (nchannels != 1 && nchannels != 2) {
106: term_printf ("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: if (!wav) {
125: term_printf ("Could not allocate memory for wav capture (%zu bytes)",
126: sizeof (*wav));
127: return -1;
128: }
129:
130: shift = bits16 + stereo;
131: hdr[34] = bits16 ? 0x10 : 0x08;
132:
133: le_store (hdr + 22, as.nchannels, 2);
134: le_store (hdr + 24, freq, 4);
135: le_store (hdr + 28, freq << shift, 4);
136: le_store (hdr + 32, 1 << shift, 2);
137:
138: wav->f = fopen (path, "wb");
139: if (!wav->f) {
140: term_printf ("Failed to open wave file `%s'\nReason: %s\n",
141: path, strerror (errno));
142: qemu_free (wav);
143: return -1;
144: }
145:
146: wav->path = qemu_strdup (path);
147: wav->bits = bits;
148: wav->nchannels = nchannels;
149: wav->freq = freq;
150:
151: qemu_put_buffer (wav->f, hdr, sizeof (hdr));
152:
153: cap = AUD_add_capture (NULL, &as, &ops, wav);
154: if (!cap) {
155: term_printf ("Failed to add audio capture\n");
156: qemu_free (wav);
157: return -1;
158: }
159:
160: wav->cap = cap;
161: s->opaque = wav;
162: s->ops = wav_capture_ops;
163: return 0;
164: }
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