1 | /* |
2 | * QEMU WAV audio driver |
3 | * |
4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #include "qemu/osdep.h" |
26 | #include "qemu/host-utils.h" |
27 | #include "qemu/module.h" |
28 | #include "qemu/timer.h" |
29 | #include "qapi/opts-visitor.h" |
30 | #include "audio.h" |
31 | |
32 | #define AUDIO_CAP "wav" |
33 | #include "audio_int.h" |
34 | |
35 | typedef struct WAVVoiceOut { |
36 | HWVoiceOut hw; |
37 | FILE *f; |
38 | int64_t old_ticks; |
39 | void *pcm_buf; |
40 | int total_samples; |
41 | } WAVVoiceOut; |
42 | |
43 | static size_t wav_run_out(HWVoiceOut *hw, size_t live) |
44 | { |
45 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
46 | size_t rpos, decr, samples; |
47 | uint8_t *dst; |
48 | struct st_sample *src; |
49 | int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
50 | int64_t ticks = now - wav->old_ticks; |
51 | int64_t bytes = |
52 | muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); |
53 | |
54 | if (bytes > INT_MAX) { |
55 | samples = INT_MAX >> hw->info.shift; |
56 | } |
57 | else { |
58 | samples = bytes >> hw->info.shift; |
59 | } |
60 | |
61 | wav->old_ticks = now; |
62 | decr = MIN (live, samples); |
63 | samples = decr; |
64 | rpos = hw->rpos; |
65 | while (samples) { |
66 | int left_till_end_samples = hw->samples - rpos; |
67 | int convert_samples = MIN (samples, left_till_end_samples); |
68 | |
69 | src = hw->mix_buf + rpos; |
70 | dst = advance (wav->pcm_buf, rpos << hw->info.shift); |
71 | |
72 | hw->clip (dst, src, convert_samples); |
73 | if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) { |
74 | dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n" , |
75 | convert_samples << hw->info.shift, strerror (errno)); |
76 | } |
77 | |
78 | rpos = (rpos + convert_samples) % hw->samples; |
79 | samples -= convert_samples; |
80 | wav->total_samples += convert_samples; |
81 | } |
82 | |
83 | hw->rpos = rpos; |
84 | return decr; |
85 | } |
86 | |
87 | /* VICE code: Store number as little endian. */ |
88 | static void le_store (uint8_t *buf, uint32_t val, int len) |
89 | { |
90 | int i; |
91 | for (i = 0; i < len; i++) { |
92 | buf[i] = (uint8_t) (val & 0xff); |
93 | val >>= 8; |
94 | } |
95 | } |
96 | |
97 | static int wav_init_out(HWVoiceOut *hw, struct audsettings *as, |
98 | void *drv_opaque) |
99 | { |
100 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
101 | int bits16 = 0, stereo = 0; |
102 | uint8_t hdr[] = { |
103 | 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
104 | 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
105 | 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
106 | 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
107 | }; |
108 | Audiodev *dev = drv_opaque; |
109 | AudiodevWavOptions *wopts = &dev->u.wav; |
110 | struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out); |
111 | const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav" ; |
112 | |
113 | stereo = wav_as.nchannels == 2; |
114 | switch (wav_as.fmt) { |
115 | case AUDIO_FORMAT_S8: |
116 | case AUDIO_FORMAT_U8: |
117 | bits16 = 0; |
118 | break; |
119 | |
120 | case AUDIO_FORMAT_S16: |
121 | case AUDIO_FORMAT_U16: |
122 | bits16 = 1; |
123 | break; |
124 | |
125 | case AUDIO_FORMAT_S32: |
126 | case AUDIO_FORMAT_U32: |
127 | dolog ("WAVE files can not handle 32bit formats\n" ); |
128 | return -1; |
129 | |
130 | default: |
131 | abort(); |
132 | } |
133 | |
134 | hdr[34] = bits16 ? 0x10 : 0x08; |
135 | |
136 | wav_as.endianness = 0; |
137 | audio_pcm_init_info (&hw->info, &wav_as); |
138 | |
139 | hw->samples = 1024; |
140 | wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift); |
141 | if (!wav->pcm_buf) { |
142 | dolog("Could not allocate buffer (%zu bytes)\n" , |
143 | hw->samples << hw->info.shift); |
144 | return -1; |
145 | } |
146 | |
147 | le_store (hdr + 22, hw->info.nchannels, 2); |
148 | le_store (hdr + 24, hw->info.freq, 4); |
149 | le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); |
150 | le_store (hdr + 32, 1 << (bits16 + stereo), 2); |
151 | |
152 | wav->f = fopen(wav_path, "wb" ); |
153 | if (!wav->f) { |
154 | dolog ("Failed to open wave file `%s'\nReason: %s\n" , |
155 | wav_path, strerror(errno)); |
156 | g_free (wav->pcm_buf); |
157 | wav->pcm_buf = NULL; |
158 | return -1; |
159 | } |
160 | |
161 | if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { |
162 | dolog ("wav_init_out: failed to write header\nReason: %s\n" , |
163 | strerror(errno)); |
164 | return -1; |
165 | } |
166 | return 0; |
167 | } |
168 | |
169 | static void wav_fini_out (HWVoiceOut *hw) |
170 | { |
171 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
172 | uint8_t rlen[4]; |
173 | uint8_t dlen[4]; |
174 | uint32_t datalen = wav->total_samples << hw->info.shift; |
175 | uint32_t rifflen = datalen + 36; |
176 | |
177 | if (!wav->f) { |
178 | return; |
179 | } |
180 | |
181 | le_store (rlen, rifflen, 4); |
182 | le_store (dlen, datalen, 4); |
183 | |
184 | if (fseek (wav->f, 4, SEEK_SET)) { |
185 | dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n" , |
186 | strerror(errno)); |
187 | goto doclose; |
188 | } |
189 | if (fwrite (rlen, 4, 1, wav->f) != 1) { |
190 | dolog ("wav_fini_out: failed to write rlen\nReason: %s\n" , |
191 | strerror (errno)); |
192 | goto doclose; |
193 | } |
194 | if (fseek (wav->f, 32, SEEK_CUR)) { |
195 | dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n" , |
196 | strerror (errno)); |
197 | goto doclose; |
198 | } |
199 | if (fwrite (dlen, 4, 1, wav->f) != 1) { |
200 | dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n" , |
201 | strerror (errno)); |
202 | goto doclose; |
203 | } |
204 | |
205 | doclose: |
206 | if (fclose (wav->f)) { |
207 | dolog ("wav_fini_out: fclose %p failed\nReason: %s\n" , |
208 | wav->f, strerror (errno)); |
209 | } |
210 | wav->f = NULL; |
211 | |
212 | g_free (wav->pcm_buf); |
213 | wav->pcm_buf = NULL; |
214 | } |
215 | |
216 | static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) |
217 | { |
218 | (void) hw; |
219 | (void) cmd; |
220 | return 0; |
221 | } |
222 | |
223 | static void *wav_audio_init(Audiodev *dev) |
224 | { |
225 | assert(dev->driver == AUDIODEV_DRIVER_WAV); |
226 | return dev; |
227 | } |
228 | |
229 | static void wav_audio_fini (void *opaque) |
230 | { |
231 | ldebug ("wav_fini" ); |
232 | } |
233 | |
234 | static struct audio_pcm_ops wav_pcm_ops = { |
235 | .init_out = wav_init_out, |
236 | .fini_out = wav_fini_out, |
237 | .run_out = wav_run_out, |
238 | .ctl_out = wav_ctl_out, |
239 | }; |
240 | |
241 | static struct audio_driver wav_audio_driver = { |
242 | .name = "wav" , |
243 | .descr = "WAV renderer http://wikipedia.org/wiki/WAV" , |
244 | .init = wav_audio_init, |
245 | .fini = wav_audio_fini, |
246 | .pcm_ops = &wav_pcm_ops, |
247 | .can_be_default = 0, |
248 | .max_voices_out = 1, |
249 | .max_voices_in = 0, |
250 | .voice_size_out = sizeof (WAVVoiceOut), |
251 | .voice_size_in = 0 |
252 | }; |
253 | |
254 | static void register_audio_wav(void) |
255 | { |
256 | audio_driver_register(&wav_audio_driver); |
257 | } |
258 | type_init(register_audio_wav); |
259 | |