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 {
42 static size_t wav_write_out(HWVoiceOut *hw, void *buf, size_t len)
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);
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));
53 wav->total_samples += bytes / hw->info.bytes_per_frame;
57 /* VICE code: Store number as little endian. */
58 static void le_store (uint8_t *buf, uint32_t val, int len)
61 for (i = 0; i < len; i++) {
62 buf[i] = (uint8_t) (val & 0xff);
67 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
70 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
71 int bits16 = 0, stereo = 0;
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
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";
83 stereo = wav_as.nchannels == 2;
90 case AUDIO_FORMAT_S16:
91 case AUDIO_FORMAT_U16:
95 case AUDIO_FORMAT_S32:
96 case AUDIO_FORMAT_U32:
97 dolog ("WAVE files can not handle 32bit formats\n");
104 hdr[34] = bits16 ? 0x10 : 0x08;
106 wav_as.endianness = 0;
107 audio_pcm_init_info (&hw->info, &wav_as);
110 le_store (hdr + 22, hw->info.nchannels, 2);
111 le_store (hdr + 24, hw->info.freq, 4);
112 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
113 le_store (hdr + 32, 1 << (bits16 + stereo), 2);
115 wav->f = fopen(wav_path, "wb");
117 dolog ("Failed to open wave file `%s'\nReason: %s\n",
118 wav_path, strerror(errno));
122 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
123 dolog ("wav_init_out: failed to write header\nReason: %s\n",
128 audio_rate_start(&wav->rate);
132 static void wav_fini_out (HWVoiceOut *hw)
134 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
137 uint32_t datalen = wav->total_samples * hw->info.bytes_per_frame;
138 uint32_t rifflen = datalen + 36;
144 le_store (rlen, rifflen, 4);
145 le_store (dlen, datalen, 4);
147 if (fseek (wav->f, 4, SEEK_SET)) {
148 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
152 if (fwrite (rlen, 4, 1, wav->f) != 1) {
153 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
157 if (fseek (wav->f, 32, SEEK_CUR)) {
158 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
162 if (fwrite (dlen, 4, 1, wav->f) != 1) {
163 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
169 if (fclose (wav->f)) {
170 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
171 wav->f, strerror (errno));
176 static void wav_enable_out(HWVoiceOut *hw, bool enable)
178 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
181 audio_rate_start(&wav->rate);
185 static void *wav_audio_init(Audiodev *dev, Error **errp)
187 assert(dev->driver == AUDIODEV_DRIVER_WAV);
191 static void wav_audio_fini (void *opaque)
196 static struct audio_pcm_ops wav_pcm_ops = {
197 .init_out = wav_init_out,
198 .fini_out = wav_fini_out,
199 .write = wav_write_out,
200 .buffer_get_free = audio_generic_buffer_get_free,
201 .run_buffer_out = audio_generic_run_buffer_out,
202 .enable_out = wav_enable_out,
205 static struct audio_driver wav_audio_driver = {
207 .descr = "WAV renderer http://wikipedia.org/wiki/WAV",
208 .init = wav_audio_init,
209 .fini = wav_audio_fini,
210 .pcm_ops = &wav_pcm_ops,
213 .voice_size_out = sizeof (WAVVoiceOut),
217 static void register_audio_wav(void)
219 audio_driver_register(&wav_audio_driver);
221 type_init(register_audio_wav);