2 * QEMU WAV audio driver
4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
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"
32 #define AUDIO_CAP "wav"
33 #include "audio_int.h"
35 typedef struct WAVVoiceOut
{
43 static size_t wav_run_out(HWVoiceOut
*hw
, size_t live
)
45 WAVVoiceOut
*wav
= (WAVVoiceOut
*) hw
;
46 size_t rpos
, decr
, samples
;
48 struct st_sample
*src
;
49 int64_t now
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
50 int64_t ticks
= now
- wav
->old_ticks
;
52 muldiv64(ticks
, hw
->info
.bytes_per_second
, NANOSECONDS_PER_SECOND
);
54 if (bytes
> INT_MAX
) {
55 samples
= INT_MAX
>> hw
->info
.shift
;
58 samples
= bytes
>> hw
->info
.shift
;
62 decr
= MIN (live
, samples
);
66 int left_till_end_samples
= hw
->samples
- rpos
;
67 int convert_samples
= MIN (samples
, left_till_end_samples
);
69 src
= hw
->mix_buf
+ rpos
;
70 dst
= advance (wav
->pcm_buf
, rpos
<< hw
->info
.shift
);
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
));
78 rpos
= (rpos
+ convert_samples
) % hw
->samples
;
79 samples
-= convert_samples
;
80 wav
->total_samples
+= convert_samples
;
87 /* VICE code: Store number as little endian. */
88 static void le_store (uint8_t *buf
, uint32_t val
, int len
)
91 for (i
= 0; i
< len
; i
++) {
92 buf
[i
] = (uint8_t) (val
& 0xff);
97 static int wav_init_out(HWVoiceOut
*hw
, struct audsettings
*as
,
100 WAVVoiceOut
*wav
= (WAVVoiceOut
*) hw
;
101 int bits16
= 0, stereo
= 0;
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
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";
113 stereo
= wav_as
.nchannels
== 2;
114 switch (wav_as
.fmt
) {
115 case AUDIO_FORMAT_S8
:
116 case AUDIO_FORMAT_U8
:
120 case AUDIO_FORMAT_S16
:
121 case AUDIO_FORMAT_U16
:
125 case AUDIO_FORMAT_S32
:
126 case AUDIO_FORMAT_U32
:
127 dolog ("WAVE files can not handle 32bit formats\n");
134 hdr
[34] = bits16
? 0x10 : 0x08;
136 wav_as
.endianness
= 0;
137 audio_pcm_init_info (&hw
->info
, &wav_as
);
140 wav
->pcm_buf
= audio_calloc(__func__
, hw
->samples
, 1 << hw
->info
.shift
);
142 dolog("Could not allocate buffer (%zu bytes)\n",
143 hw
->samples
<< hw
->info
.shift
);
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);
152 wav
->f
= fopen(wav_path
, "wb");
154 dolog ("Failed to open wave file `%s'\nReason: %s\n",
155 wav_path
, strerror(errno
));
156 g_free (wav
->pcm_buf
);
161 if (fwrite (hdr
, sizeof (hdr
), 1, wav
->f
) != 1) {
162 dolog ("wav_init_out: failed to write header\nReason: %s\n",
169 static void wav_fini_out (HWVoiceOut
*hw
)
171 WAVVoiceOut
*wav
= (WAVVoiceOut
*) hw
;
174 uint32_t datalen
= wav
->total_samples
<< hw
->info
.shift
;
175 uint32_t rifflen
= datalen
+ 36;
181 le_store (rlen
, rifflen
, 4);
182 le_store (dlen
, datalen
, 4);
184 if (fseek (wav
->f
, 4, SEEK_SET
)) {
185 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
189 if (fwrite (rlen
, 4, 1, wav
->f
) != 1) {
190 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
194 if (fseek (wav
->f
, 32, SEEK_CUR
)) {
195 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
199 if (fwrite (dlen
, 4, 1, wav
->f
) != 1) {
200 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
206 if (fclose (wav
->f
)) {
207 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
208 wav
->f
, strerror (errno
));
212 g_free (wav
->pcm_buf
);
216 static int wav_ctl_out (HWVoiceOut
*hw
, int cmd
, ...)
223 static void *wav_audio_init(Audiodev
*dev
)
225 assert(dev
->driver
== AUDIODEV_DRIVER_WAV
);
229 static void wav_audio_fini (void *opaque
)
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
,
241 static struct audio_driver wav_audio_driver
= {
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
,
250 .voice_size_out
= sizeof (WAVVoiceOut
),
254 static void register_audio_wav(void)
256 audio_driver_register(&wav_audio_driver
);
258 type_init(register_audio_wav
);