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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 | #include "hw/hw.h" | |
25 | #include "qemu-timer.h" | |
26 | #include "audio.h" | |
27 | ||
28 | #define AUDIO_CAP "wav" | |
29 | #include "audio_int.h" | |
30 | ||
31 | typedef struct WAVVoiceOut { | |
32 | HWVoiceOut hw; | |
33 | FILE *f; | |
34 | int64_t old_ticks; | |
35 | void *pcm_buf; | |
36 | int total_samples; | |
37 | } WAVVoiceOut; | |
38 | ||
39 | static struct { | |
40 | struct audsettings settings; | |
41 | const char *wav_path; | |
42 | } conf = { | |
43 | .settings.freq = 44100, | |
44 | .settings.nchannels = 2, | |
45 | .settings.fmt = AUD_FMT_S16, | |
46 | .wav_path = "qemu.wav" | |
47 | }; | |
48 | ||
49 | static int wav_run_out (HWVoiceOut *hw, int live) | |
50 | { | |
51 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; | |
52 | int rpos, decr, samples; | |
53 | uint8_t *dst; | |
54 | struct st_sample *src; | |
55 | int64_t now = qemu_get_clock_ns (vm_clock); | |
56 | int64_t ticks = now - wav->old_ticks; | |
57 | int64_t bytes = | |
58 | muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ()); | |
59 | ||
60 | if (bytes > INT_MAX) { | |
61 | samples = INT_MAX >> hw->info.shift; | |
62 | } | |
63 | else { | |
64 | samples = bytes >> hw->info.shift; | |
65 | } | |
66 | ||
67 | wav->old_ticks = now; | |
68 | decr = audio_MIN (live, samples); | |
69 | samples = decr; | |
70 | rpos = hw->rpos; | |
71 | while (samples) { | |
72 | int left_till_end_samples = hw->samples - rpos; | |
73 | int convert_samples = audio_MIN (samples, left_till_end_samples); | |
74 | ||
75 | src = hw->mix_buf + rpos; | |
76 | dst = advance (wav->pcm_buf, rpos << hw->info.shift); | |
77 | ||
78 | hw->clip (dst, src, convert_samples); | |
79 | if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) { | |
80 | dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n", | |
81 | convert_samples << hw->info.shift, strerror (errno)); | |
82 | } | |
83 | ||
84 | rpos = (rpos + convert_samples) % hw->samples; | |
85 | samples -= convert_samples; | |
86 | wav->total_samples += convert_samples; | |
87 | } | |
88 | ||
89 | hw->rpos = rpos; | |
90 | return decr; | |
91 | } | |
92 | ||
93 | static int wav_write_out (SWVoiceOut *sw, void *buf, int len) | |
94 | { | |
95 | return audio_pcm_sw_write (sw, buf, len); | |
96 | } | |
97 | ||
98 | /* VICE code: Store number as little endian. */ | |
99 | static void le_store (uint8_t *buf, uint32_t val, int len) | |
100 | { | |
101 | int i; | |
102 | for (i = 0; i < len; i++) { | |
103 | buf[i] = (uint8_t) (val & 0xff); | |
104 | val >>= 8; | |
105 | } | |
106 | } | |
107 | ||
108 | static int wav_init_out (HWVoiceOut *hw, struct audsettings *as) | |
109 | { | |
110 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; | |
111 | int bits16 = 0, stereo = 0; | |
112 | uint8_t hdr[] = { | |
113 | 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, | |
114 | 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, | |
115 | 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, | |
116 | 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 | |
117 | }; | |
118 | struct audsettings wav_as = conf.settings; | |
119 | ||
120 | (void) as; | |
121 | ||
122 | stereo = wav_as.nchannels == 2; | |
123 | switch (wav_as.fmt) { | |
124 | case AUD_FMT_S8: | |
125 | case AUD_FMT_U8: | |
126 | bits16 = 0; | |
127 | break; | |
128 | ||
129 | case AUD_FMT_S16: | |
130 | case AUD_FMT_U16: | |
131 | bits16 = 1; | |
132 | break; | |
133 | ||
134 | case AUD_FMT_S32: | |
135 | case AUD_FMT_U32: | |
136 | dolog ("WAVE files can not handle 32bit formats\n"); | |
137 | return -1; | |
138 | } | |
139 | ||
140 | hdr[34] = bits16 ? 0x10 : 0x08; | |
141 | ||
142 | wav_as.endianness = 0; | |
143 | audio_pcm_init_info (&hw->info, &wav_as); | |
144 | ||
145 | hw->samples = 1024; | |
146 | wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); | |
147 | if (!wav->pcm_buf) { | |
148 | dolog ("Could not allocate buffer (%d bytes)\n", | |
149 | hw->samples << hw->info.shift); | |
150 | return -1; | |
151 | } | |
152 | ||
153 | le_store (hdr + 22, hw->info.nchannels, 2); | |
154 | le_store (hdr + 24, hw->info.freq, 4); | |
155 | le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); | |
156 | le_store (hdr + 32, 1 << (bits16 + stereo), 2); | |
157 | ||
158 | wav->f = fopen (conf.wav_path, "wb"); | |
159 | if (!wav->f) { | |
160 | dolog ("Failed to open wave file `%s'\nReason: %s\n", | |
161 | conf.wav_path, strerror (errno)); | |
162 | g_free (wav->pcm_buf); | |
163 | wav->pcm_buf = NULL; | |
164 | return -1; | |
165 | } | |
166 | ||
167 | if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { | |
168 | dolog ("wav_init_out: failed to write header\nReason: %s\n", | |
169 | strerror(errno)); | |
170 | return -1; | |
171 | } | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static void wav_fini_out (HWVoiceOut *hw) | |
176 | { | |
177 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; | |
178 | uint8_t rlen[4]; | |
179 | uint8_t dlen[4]; | |
180 | uint32_t datalen = wav->total_samples << hw->info.shift; | |
181 | uint32_t rifflen = datalen + 36; | |
182 | ||
183 | if (!wav->f) { | |
184 | return; | |
185 | } | |
186 | ||
187 | le_store (rlen, rifflen, 4); | |
188 | le_store (dlen, datalen, 4); | |
189 | ||
190 | if (fseek (wav->f, 4, SEEK_SET)) { | |
191 | dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n", | |
192 | strerror(errno)); | |
193 | goto doclose; | |
194 | } | |
195 | if (fwrite (rlen, 4, 1, wav->f) != 1) { | |
196 | dolog ("wav_fini_out: failed to write rlen\nReason: %s\n", | |
197 | strerror (errno)); | |
198 | goto doclose; | |
199 | } | |
200 | if (fseek (wav->f, 32, SEEK_CUR)) { | |
201 | dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n", | |
202 | strerror (errno)); | |
203 | goto doclose; | |
204 | } | |
205 | if (fwrite (dlen, 4, 1, wav->f) != 1) { | |
206 | dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n", | |
207 | strerror (errno)); | |
208 | goto doclose; | |
209 | } | |
210 | ||
211 | doclose: | |
212 | if (fclose (wav->f)) { | |
213 | dolog ("wav_fini_out: fclose %p failed\nReason: %s\n", | |
214 | wav->f, strerror (errno)); | |
215 | } | |
216 | wav->f = NULL; | |
217 | ||
218 | g_free (wav->pcm_buf); | |
219 | wav->pcm_buf = NULL; | |
220 | } | |
221 | ||
222 | static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) | |
223 | { | |
224 | (void) hw; | |
225 | (void) cmd; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static void *wav_audio_init (void) | |
230 | { | |
231 | return &conf; | |
232 | } | |
233 | ||
234 | static void wav_audio_fini (void *opaque) | |
235 | { | |
236 | (void) opaque; | |
237 | ldebug ("wav_fini"); | |
238 | } | |
239 | ||
240 | static struct audio_option wav_options[] = { | |
241 | { | |
242 | .name = "FREQUENCY", | |
243 | .tag = AUD_OPT_INT, | |
244 | .valp = &conf.settings.freq, | |
245 | .descr = "Frequency" | |
246 | }, | |
247 | { | |
248 | .name = "FORMAT", | |
249 | .tag = AUD_OPT_FMT, | |
250 | .valp = &conf.settings.fmt, | |
251 | .descr = "Format" | |
252 | }, | |
253 | { | |
254 | .name = "DAC_FIXED_CHANNELS", | |
255 | .tag = AUD_OPT_INT, | |
256 | .valp = &conf.settings.nchannels, | |
257 | .descr = "Number of channels (1 - mono, 2 - stereo)" | |
258 | }, | |
259 | { | |
260 | .name = "PATH", | |
261 | .tag = AUD_OPT_STR, | |
262 | .valp = &conf.wav_path, | |
263 | .descr = "Path to wave file" | |
264 | }, | |
265 | { /* End of list */ } | |
266 | }; | |
267 | ||
268 | static struct audio_pcm_ops wav_pcm_ops = { | |
269 | .init_out = wav_init_out, | |
270 | .fini_out = wav_fini_out, | |
271 | .run_out = wav_run_out, | |
272 | .write = wav_write_out, | |
273 | .ctl_out = wav_ctl_out, | |
274 | }; | |
275 | ||
276 | struct audio_driver wav_audio_driver = { | |
277 | .name = "wav", | |
278 | .descr = "WAV renderer http://wikipedia.org/wiki/WAV", | |
279 | .options = wav_options, | |
280 | .init = wav_audio_init, | |
281 | .fini = wav_audio_fini, | |
282 | .pcm_ops = &wav_pcm_ops, | |
283 | .can_be_default = 0, | |
284 | .max_voices_out = 1, | |
285 | .max_voices_in = 0, | |
286 | .voice_size_out = sizeof (WAVVoiceOut), | |
287 | .voice_size_in = 0 | |
288 | }; |