1 | #include "qemu/osdep.h" |
2 | #include "monitor/monitor.h" |
3 | #include "qapi/error.h" |
4 | #include "qemu/error-report.h" |
5 | #include "audio.h" |
6 | |
7 | typedef struct { |
8 | FILE *f; |
9 | int bytes; |
10 | char *path; |
11 | int freq; |
12 | int bits; |
13 | int nchannels; |
14 | CaptureVoiceOut *cap; |
15 | } WAVState; |
16 | |
17 | /* VICE code: Store number as little endian. */ |
18 | static void le_store (uint8_t *buf, uint32_t val, int len) |
19 | { |
20 | int i; |
21 | for (i = 0; i < len; i++) { |
22 | buf[i] = (uint8_t) (val & 0xff); |
23 | val >>= 8; |
24 | } |
25 | } |
26 | |
27 | static void wav_notify (void *opaque, audcnotification_e cmd) |
28 | { |
29 | (void) opaque; |
30 | (void) cmd; |
31 | } |
32 | |
33 | static void wav_destroy (void *opaque) |
34 | { |
35 | WAVState *wav = opaque; |
36 | uint8_t rlen[4]; |
37 | uint8_t dlen[4]; |
38 | uint32_t datalen = wav->bytes; |
39 | uint32_t rifflen = datalen + 36; |
40 | |
41 | if (wav->f) { |
42 | le_store (rlen, rifflen, 4); |
43 | le_store (dlen, datalen, 4); |
44 | |
45 | if (fseek (wav->f, 4, SEEK_SET)) { |
46 | error_report("wav_destroy: rlen fseek failed: %s" , |
47 | strerror(errno)); |
48 | goto doclose; |
49 | } |
50 | if (fwrite (rlen, 4, 1, wav->f) != 1) { |
51 | error_report("wav_destroy: rlen fwrite failed: %s" , |
52 | strerror(errno)); |
53 | goto doclose; |
54 | } |
55 | if (fseek (wav->f, 32, SEEK_CUR)) { |
56 | error_report("wav_destroy: dlen fseek failed: %s" , |
57 | strerror(errno)); |
58 | goto doclose; |
59 | } |
60 | if (fwrite (dlen, 1, 4, wav->f) != 4) { |
61 | error_report("wav_destroy: dlen fwrite failed: %s" , |
62 | strerror(errno)); |
63 | goto doclose; |
64 | } |
65 | doclose: |
66 | if (fclose (wav->f)) { |
67 | error_report("wav_destroy: fclose failed: %s" , strerror(errno)); |
68 | } |
69 | } |
70 | |
71 | g_free (wav->path); |
72 | } |
73 | |
74 | static void wav_capture (void *opaque, void *buf, int size) |
75 | { |
76 | WAVState *wav = opaque; |
77 | |
78 | if (fwrite (buf, size, 1, wav->f) != 1) { |
79 | error_report("wav_capture: fwrite error: %s" , strerror(errno)); |
80 | } |
81 | wav->bytes += size; |
82 | } |
83 | |
84 | static void wav_capture_destroy (void *opaque) |
85 | { |
86 | WAVState *wav = opaque; |
87 | |
88 | AUD_del_capture (wav->cap, wav); |
89 | g_free (wav); |
90 | } |
91 | |
92 | static void wav_capture_info (void *opaque) |
93 | { |
94 | WAVState *wav = opaque; |
95 | char *path = wav->path; |
96 | |
97 | monitor_printf (cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n" , |
98 | wav->freq, wav->bits, wav->nchannels, |
99 | path ? path : "<not available>" , wav->bytes); |
100 | } |
101 | |
102 | static struct capture_ops wav_capture_ops = { |
103 | .destroy = wav_capture_destroy, |
104 | .info = wav_capture_info |
105 | }; |
106 | |
107 | int wav_start_capture(AudioState *state, CaptureState *s, const char *path, |
108 | int freq, int bits, int nchannels) |
109 | { |
110 | WAVState *wav; |
111 | uint8_t hdr[] = { |
112 | 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
113 | 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
114 | 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
115 | 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
116 | }; |
117 | struct audsettings as; |
118 | struct audio_capture_ops ops; |
119 | int stereo, bits16, shift; |
120 | CaptureVoiceOut *cap; |
121 | |
122 | if (bits != 8 && bits != 16) { |
123 | error_report("incorrect bit count %d, must be 8 or 16" , bits); |
124 | return -1; |
125 | } |
126 | |
127 | if (nchannels != 1 && nchannels != 2) { |
128 | error_report("incorrect channel count %d, must be 1 or 2" , |
129 | nchannels); |
130 | return -1; |
131 | } |
132 | |
133 | stereo = nchannels == 2; |
134 | bits16 = bits == 16; |
135 | |
136 | as.freq = freq; |
137 | as.nchannels = 1 << stereo; |
138 | as.fmt = bits16 ? AUDIO_FORMAT_S16 : AUDIO_FORMAT_U8; |
139 | as.endianness = 0; |
140 | |
141 | ops.notify = wav_notify; |
142 | ops.capture = wav_capture; |
143 | ops.destroy = wav_destroy; |
144 | |
145 | wav = g_malloc0 (sizeof (*wav)); |
146 | |
147 | shift = bits16 + stereo; |
148 | hdr[34] = bits16 ? 0x10 : 0x08; |
149 | |
150 | le_store (hdr + 22, as.nchannels, 2); |
151 | le_store (hdr + 24, freq, 4); |
152 | le_store (hdr + 28, freq << shift, 4); |
153 | le_store (hdr + 32, 1 << shift, 2); |
154 | |
155 | wav->f = fopen (path, "wb" ); |
156 | if (!wav->f) { |
157 | error_report("Failed to open wave file `%s': %s" , |
158 | path, strerror(errno)); |
159 | g_free (wav); |
160 | return -1; |
161 | } |
162 | |
163 | wav->path = g_strdup (path); |
164 | wav->bits = bits; |
165 | wav->nchannels = nchannels; |
166 | wav->freq = freq; |
167 | |
168 | if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { |
169 | error_report("Failed to write header: %s" , strerror(errno)); |
170 | goto error_free; |
171 | } |
172 | |
173 | cap = AUD_add_capture(state, &as, &ops, wav); |
174 | if (!cap) { |
175 | error_report("Failed to add audio capture" ); |
176 | goto error_free; |
177 | } |
178 | |
179 | wav->cap = cap; |
180 | s->opaque = wav; |
181 | s->ops = wav_capture_ops; |
182 | return 0; |
183 | |
184 | error_free: |
185 | g_free (wav->path); |
186 | if (fclose (wav->f)) { |
187 | error_report("Failed to close wave file: %s" , strerror(errno)); |
188 | } |
189 | g_free (wav); |
190 | return -1; |
191 | } |
192 | |