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/timer.h"
28 #define AUDIO_CAP "wav"
29 #include "audio_int.h"
31 typedef struct WAVVoiceOut {
40 struct audsettings settings;
44 static int wav_run_out (HWVoiceOut *hw, int live)
46 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
47 int rpos, decr, samples;
49 struct st_sample *src;
50 int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
51 int64_t ticks = now - wav->old_ticks;
53 muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());
55 if (bytes > INT_MAX) {
56 samples = INT_MAX >> hw->info.shift;
59 samples = bytes >> hw->info.shift;
63 decr = audio_MIN (live, samples);
67 int left_till_end_samples = hw->samples - rpos;
68 int convert_samples = audio_MIN (samples, left_till_end_samples);
70 src = hw->mix_buf + rpos;
71 dst = advance (wav->pcm_buf, rpos << hw->info.shift);
73 hw->clip (dst, src, convert_samples);
74 if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
75 dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
76 convert_samples << hw->info.shift, strerror (errno));
79 rpos = (rpos + convert_samples) % hw->samples;
80 samples -= convert_samples;
81 wav->total_samples += convert_samples;
88 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
90 return audio_pcm_sw_write (sw, buf, len);
93 /* VICE code: Store number as little endian. */
94 static void le_store (uint8_t *buf, uint32_t val, int len)
97 for (i = 0; i < len; i++) {
98 buf[i] = (uint8_t) (val & 0xff);
103 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
106 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
107 int bits16 = 0, stereo = 0;
109 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
110 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
111 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
112 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
114 WAVConf *conf = drv_opaque;
115 struct audsettings wav_as = conf->settings;
117 stereo = wav_as.nchannels == 2;
118 switch (wav_as.fmt) {
131 dolog ("WAVE files can not handle 32bit formats\n");
135 hdr[34] = bits16 ? 0x10 : 0x08;
137 wav_as.endianness = 0;
138 audio_pcm_init_info (&hw->info, &wav_as);
141 wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
143 dolog ("Could not allocate buffer (%d bytes)\n",
144 hw->samples << hw->info.shift);
148 le_store (hdr + 22, hw->info.nchannels, 2);
149 le_store (hdr + 24, hw->info.freq, 4);
150 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
151 le_store (hdr + 32, 1 << (bits16 + stereo), 2);
153 wav->f = fopen (conf->wav_path, "wb");
155 dolog ("Failed to open wave file `%s'\nReason: %s\n",
156 conf->wav_path, strerror (errno));
157 g_free (wav->pcm_buf);
162 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
163 dolog ("wav_init_out: failed to write header\nReason: %s\n",
170 static void wav_fini_out (HWVoiceOut *hw)
172 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
175 uint32_t datalen = wav->total_samples << hw->info.shift;
176 uint32_t rifflen = datalen + 36;
182 le_store (rlen, rifflen, 4);
183 le_store (dlen, datalen, 4);
185 if (fseek (wav->f, 4, SEEK_SET)) {
186 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
190 if (fwrite (rlen, 4, 1, wav->f) != 1) {
191 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
195 if (fseek (wav->f, 32, SEEK_CUR)) {
196 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
200 if (fwrite (dlen, 4, 1, wav->f) != 1) {
201 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
207 if (fclose (wav->f)) {
208 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
209 wav->f, strerror (errno));
213 g_free (wav->pcm_buf);
217 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
224 static WAVConf glob_conf = {
225 .settings.freq = 44100,
226 .settings.nchannels = 2,
227 .settings.fmt = AUD_FMT_S16,
228 .wav_path = "qemu.wav"
231 static void *wav_audio_init (void)
233 WAVConf *conf = g_malloc(sizeof(WAVConf));
238 static void wav_audio_fini (void *opaque)
244 static struct audio_option wav_options[] = {
248 .valp = &glob_conf.settings.freq,
254 .valp = &glob_conf.settings.fmt,
258 .name = "DAC_FIXED_CHANNELS",
260 .valp = &glob_conf.settings.nchannels,
261 .descr = "Number of channels (1 - mono, 2 - stereo)"
266 .valp = &glob_conf.wav_path,
267 .descr = "Path to wave file"
269 { /* End of list */ }
272 static struct audio_pcm_ops wav_pcm_ops = {
273 .init_out = wav_init_out,
274 .fini_out = wav_fini_out,
275 .run_out = wav_run_out,
276 .write = wav_write_out,
277 .ctl_out = wav_ctl_out,
280 struct audio_driver wav_audio_driver = {
282 .descr = "WAV renderer http://wikipedia.org/wiki/WAV",
283 .options = wav_options,
284 .init = wav_audio_init,
285 .fini = wav_audio_fini,
286 .pcm_ops = &wav_pcm_ops,
290 .voice_size_out = sizeof (WAVVoiceOut),