xref: /openbmc/qemu/audio/wavaudio.c (revision 5b4edd72)
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     RateCtl rate;
39     int total_samples;
40 } WAVVoiceOut;
41 
wav_write_out(HWVoiceOut * hw,void * buf,size_t len)42 static size_t wav_write_out(HWVoiceOut *hw, void *buf, size_t len)
43 {
44     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
45     int64_t bytes = audio_rate_get_bytes(&wav->rate, &hw->info, len);
46     assert(bytes % hw->info.bytes_per_frame == 0);
47 
48     if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) {
49         dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n",
50               bytes, strerror(errno));
51     }
52 
53     wav->total_samples += bytes / hw->info.bytes_per_frame;
54     return bytes;
55 }
56 
57 /* VICE code: Store number as little endian. */
le_store(uint8_t * buf,uint32_t val,int len)58 static void le_store (uint8_t *buf, uint32_t val, int len)
59 {
60     int i;
61     for (i = 0; i < len; i++) {
62         buf[i] = (uint8_t) (val & 0xff);
63         val >>= 8;
64     }
65 }
66 
wav_init_out(HWVoiceOut * hw,struct audsettings * as,void * drv_opaque)67 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
68                         void *drv_opaque)
69 {
70     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
71     int bits16 = 0, stereo = 0;
72     uint8_t hdr[] = {
73         0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
74         0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
75         0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
76         0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
77     };
78     Audiodev *dev = drv_opaque;
79     AudiodevWavOptions *wopts = &dev->u.wav;
80     struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out);
81     const char *wav_path = wopts->path ?: "qemu.wav";
82 
83     stereo = wav_as.nchannels == 2;
84     switch (wav_as.fmt) {
85     case AUDIO_FORMAT_S8:
86     case AUDIO_FORMAT_U8:
87         bits16 = 0;
88         break;
89 
90     case AUDIO_FORMAT_S16:
91     case AUDIO_FORMAT_U16:
92         bits16 = 1;
93         break;
94 
95     case AUDIO_FORMAT_S32:
96     case AUDIO_FORMAT_U32:
97         dolog ("WAVE files can not handle 32bit formats\n");
98         return -1;
99 
100     case AUDIO_FORMAT_F32:
101         dolog("WAVE files can not handle float formats\n");
102         return -1;
103 
104     default:
105         abort();
106     }
107 
108     hdr[34] = bits16 ? 0x10 : 0x08;
109 
110     wav_as.endianness = 0;
111     audio_pcm_init_info (&hw->info, &wav_as);
112 
113     hw->samples = 1024;
114     le_store (hdr + 22, hw->info.nchannels, 2);
115     le_store (hdr + 24, hw->info.freq, 4);
116     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
117     le_store (hdr + 32, 1 << (bits16 + stereo), 2);
118 
119     wav->f = fopen(wav_path, "wb");
120     if (!wav->f) {
121         dolog ("Failed to open wave file `%s'\nReason: %s\n",
122                wav_path, strerror(errno));
123         return -1;
124     }
125 
126     if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
127         dolog ("wav_init_out: failed to write header\nReason: %s\n",
128                strerror(errno));
129         return -1;
130     }
131 
132     audio_rate_start(&wav->rate);
133     return 0;
134 }
135 
wav_fini_out(HWVoiceOut * hw)136 static void wav_fini_out (HWVoiceOut *hw)
137 {
138     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
139     uint8_t rlen[4];
140     uint8_t dlen[4];
141     uint32_t datalen = wav->total_samples * hw->info.bytes_per_frame;
142     uint32_t rifflen = datalen + 36;
143 
144     if (!wav->f) {
145         return;
146     }
147 
148     le_store (rlen, rifflen, 4);
149     le_store (dlen, datalen, 4);
150 
151     if (fseek (wav->f, 4, SEEK_SET)) {
152         dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
153                strerror(errno));
154         goto doclose;
155     }
156     if (fwrite (rlen, 4, 1, wav->f) != 1) {
157         dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
158                strerror (errno));
159         goto doclose;
160     }
161     if (fseek (wav->f, 32, SEEK_CUR)) {
162         dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
163                strerror (errno));
164         goto doclose;
165     }
166     if (fwrite (dlen, 4, 1, wav->f) != 1) {
167         dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
168                strerror (errno));
169         goto doclose;
170     }
171 
172  doclose:
173     if (fclose (wav->f))  {
174         dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
175                wav->f, strerror (errno));
176     }
177     wav->f = NULL;
178 }
179 
wav_enable_out(HWVoiceOut * hw,bool enable)180 static void wav_enable_out(HWVoiceOut *hw, bool enable)
181 {
182     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
183 
184     if (enable) {
185         audio_rate_start(&wav->rate);
186     }
187 }
188 
wav_audio_init(Audiodev * dev,Error ** errp)189 static void *wav_audio_init(Audiodev *dev, Error **errp)
190 {
191     assert(dev->driver == AUDIODEV_DRIVER_WAV);
192     return dev;
193 }
194 
wav_audio_fini(void * opaque)195 static void wav_audio_fini (void *opaque)
196 {
197     ldebug ("wav_fini");
198 }
199 
200 static struct audio_pcm_ops wav_pcm_ops = {
201     .init_out = wav_init_out,
202     .fini_out = wav_fini_out,
203     .write    = wav_write_out,
204     .buffer_get_free = audio_generic_buffer_get_free,
205     .run_buffer_out = audio_generic_run_buffer_out,
206     .enable_out = wav_enable_out,
207 };
208 
209 static struct audio_driver wav_audio_driver = {
210     .name           = "wav",
211     .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
212     .init           = wav_audio_init,
213     .fini           = wav_audio_fini,
214     .pcm_ops        = &wav_pcm_ops,
215     .max_voices_out = 1,
216     .max_voices_in  = 0,
217     .voice_size_out = sizeof (WAVVoiceOut),
218     .voice_size_in  = 0
219 };
220 
register_audio_wav(void)221 static void register_audio_wav(void)
222 {
223     audio_driver_register(&wav_audio_driver);
224 }
225 type_init(register_audio_wav);
226