virtio-pci: Don't use ioeventfd on old kernels
[qemu/stefanha.git] / audio / wavaudio.c
blobc522be4531f2831b44b00cf88596a59afcaad04a
1 /*
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
22 * THE SOFTWARE.
24 #include "hw/hw.h"
25 #include "qemu-timer.h"
26 #include "audio.h"
28 #define AUDIO_CAP "wav"
29 #include "audio_int.h"
31 typedef struct WAVVoiceOut {
32 HWVoiceOut hw;
33 QEMUFile *f;
34 int64_t old_ticks;
35 void *pcm_buf;
36 int total_samples;
37 } WAVVoiceOut;
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"
49 static int wav_run_out (HWVoiceOut *hw, int live)
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 (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 ());
60 if (bytes > INT_MAX) {
61 samples = INT_MAX >> hw->info.shift;
63 else {
64 samples = bytes >> hw->info.shift;
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);
75 src = hw->mix_buf + rpos;
76 dst = advance (wav->pcm_buf, rpos << hw->info.shift);
78 hw->clip (dst, src, convert_samples);
79 qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
81 rpos = (rpos + convert_samples) % hw->samples;
82 samples -= convert_samples;
83 wav->total_samples += convert_samples;
86 hw->rpos = rpos;
87 return decr;
90 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
92 return audio_pcm_sw_write (sw, buf, len);
95 /* VICE code: Store number as little endian. */
96 static void le_store (uint8_t *buf, uint32_t val, int len)
98 int i;
99 for (i = 0; i < len; i++) {
100 buf[i] = (uint8_t) (val & 0xff);
101 val >>= 8;
105 static int wav_init_out (HWVoiceOut *hw, struct audsettings *as)
107 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
108 int bits16 = 0, stereo = 0;
109 uint8_t hdr[] = {
110 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
111 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
112 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
113 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
115 struct audsettings wav_as = conf.settings;
117 (void) as;
119 stereo = wav_as.nchannels == 2;
120 switch (wav_as.fmt) {
121 case AUD_FMT_S8:
122 case AUD_FMT_U8:
123 bits16 = 0;
124 break;
126 case AUD_FMT_S16:
127 case AUD_FMT_U16:
128 bits16 = 1;
129 break;
131 case AUD_FMT_S32:
132 case AUD_FMT_U32:
133 dolog ("WAVE files can not handle 32bit formats\n");
134 return -1;
137 hdr[34] = bits16 ? 0x10 : 0x08;
139 wav_as.endianness = 0;
140 audio_pcm_init_info (&hw->info, &wav_as);
142 hw->samples = 1024;
143 wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
144 if (!wav->pcm_buf) {
145 dolog ("Could not allocate buffer (%d bytes)\n",
146 hw->samples << hw->info.shift);
147 return -1;
150 le_store (hdr + 22, hw->info.nchannels, 2);
151 le_store (hdr + 24, hw->info.freq, 4);
152 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
153 le_store (hdr + 32, 1 << (bits16 + stereo), 2);
155 wav->f = qemu_fopen (conf.wav_path, "wb");
156 if (!wav->f) {
157 dolog ("Failed to open wave file `%s'\nReason: %s\n",
158 conf.wav_path, strerror (errno));
159 qemu_free (wav->pcm_buf);
160 wav->pcm_buf = NULL;
161 return -1;
164 qemu_put_buffer (wav->f, hdr, sizeof (hdr));
165 return 0;
168 static void wav_fini_out (HWVoiceOut *hw)
170 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
171 uint8_t rlen[4];
172 uint8_t dlen[4];
173 uint32_t datalen = wav->total_samples << hw->info.shift;
174 uint32_t rifflen = datalen + 36;
176 if (!wav->f) {
177 return;
180 le_store (rlen, rifflen, 4);
181 le_store (dlen, datalen, 4);
183 qemu_fseek (wav->f, 4, SEEK_SET);
184 qemu_put_buffer (wav->f, rlen, 4);
186 qemu_fseek (wav->f, 32, SEEK_CUR);
187 qemu_put_buffer (wav->f, dlen, 4);
189 qemu_fclose (wav->f);
190 wav->f = NULL;
192 qemu_free (wav->pcm_buf);
193 wav->pcm_buf = NULL;
196 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
198 (void) hw;
199 (void) cmd;
200 return 0;
203 static void *wav_audio_init (void)
205 return &conf;
208 static void wav_audio_fini (void *opaque)
210 (void) opaque;
211 ldebug ("wav_fini");
214 static struct audio_option wav_options[] = {
216 .name = "FREQUENCY",
217 .tag = AUD_OPT_INT,
218 .valp = &conf.settings.freq,
219 .descr = "Frequency"
222 .name = "FORMAT",
223 .tag = AUD_OPT_FMT,
224 .valp = &conf.settings.fmt,
225 .descr = "Format"
228 .name = "DAC_FIXED_CHANNELS",
229 .tag = AUD_OPT_INT,
230 .valp = &conf.settings.nchannels,
231 .descr = "Number of channels (1 - mono, 2 - stereo)"
234 .name = "PATH",
235 .tag = AUD_OPT_STR,
236 .valp = &conf.wav_path,
237 .descr = "Path to wave file"
239 { /* End of list */ }
242 static struct audio_pcm_ops wav_pcm_ops = {
243 .init_out = wav_init_out,
244 .fini_out = wav_fini_out,
245 .run_out = wav_run_out,
246 .write = wav_write_out,
247 .ctl_out = wav_ctl_out,
250 struct audio_driver wav_audio_driver = {
251 .name = "wav",
252 .descr = "WAV renderer http://wikipedia.org/wiki/WAV",
253 .options = wav_options,
254 .init = wav_audio_init,
255 .fini = wav_audio_fini,
256 .pcm_ops = &wav_pcm_ops,
257 .can_be_default = 0,
258 .max_voices_out = 1,
259 .max_voices_in = 0,
260 .voice_size_out = sizeof (WAVVoiceOut),
261 .voice_size_in = 0