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24#include "qemu/osdep.h"
25#include "qemu/host-utils.h"
26#include "qemu/timer.h"
27#include "audio.h"
28
29#define AUDIO_CAP "wav"
30#include "audio_int.h"
31
32typedef struct WAVVoiceOut {
33 HWVoiceOut hw;
34 FILE *f;
35 int64_t old_ticks;
36 void *pcm_buf;
37 int total_samples;
38} WAVVoiceOut;
39
40typedef struct {
41 struct audsettings settings;
42 const char *wav_path;
43} WAVConf;
44
45static int wav_run_out (HWVoiceOut *hw, int live)
46{
47 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
48 int rpos, decr, samples;
49 uint8_t *dst;
50 struct st_sample *src;
51 int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
52 int64_t ticks = now - wav->old_ticks;
53 int64_t bytes =
54 muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
55
56 if (bytes > INT_MAX) {
57 samples = INT_MAX >> hw->info.shift;
58 }
59 else {
60 samples = bytes >> hw->info.shift;
61 }
62
63 wav->old_ticks = now;
64 decr = audio_MIN (live, samples);
65 samples = decr;
66 rpos = hw->rpos;
67 while (samples) {
68 int left_till_end_samples = hw->samples - rpos;
69 int convert_samples = audio_MIN (samples, left_till_end_samples);
70
71 src = hw->mix_buf + rpos;
72 dst = advance (wav->pcm_buf, rpos << hw->info.shift);
73
74 hw->clip (dst, src, convert_samples);
75 if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
76 dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
77 convert_samples << hw->info.shift, strerror (errno));
78 }
79
80 rpos = (rpos + convert_samples) % hw->samples;
81 samples -= convert_samples;
82 wav->total_samples += convert_samples;
83 }
84
85 hw->rpos = rpos;
86 return decr;
87}
88
89static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
90{
91 return audio_pcm_sw_write (sw, buf, len);
92}
93
94
95static void le_store (uint8_t *buf, uint32_t val, int len)
96{
97 int i;
98 for (i = 0; i < len; i++) {
99 buf[i] = (uint8_t) (val & 0xff);
100 val >>= 8;
101 }
102}
103
104static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
105 void *drv_opaque)
106{
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
114 };
115 WAVConf *conf = drv_opaque;
116 struct audsettings wav_as = conf->settings;
117
118 stereo = wav_as.nchannels == 2;
119 switch (wav_as.fmt) {
120 case AUD_FMT_S8:
121 case AUD_FMT_U8:
122 bits16 = 0;
123 break;
124
125 case AUD_FMT_S16:
126 case AUD_FMT_U16:
127 bits16 = 1;
128 break;
129
130 case AUD_FMT_S32:
131 case AUD_FMT_U32:
132 dolog ("WAVE files can not handle 32bit formats\n");
133 return -1;
134 }
135
136 hdr[34] = bits16 ? 0x10 : 0x08;
137
138 wav_as.endianness = 0;
139 audio_pcm_init_info (&hw->info, &wav_as);
140
141 hw->samples = 1024;
142 wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
143 if (!wav->pcm_buf) {
144 dolog ("Could not allocate buffer (%d bytes)\n",
145 hw->samples << hw->info.shift);
146 return -1;
147 }
148
149 le_store (hdr + 22, hw->info.nchannels, 2);
150 le_store (hdr + 24, hw->info.freq, 4);
151 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
152 le_store (hdr + 32, 1 << (bits16 + stereo), 2);
153
154 wav->f = fopen (conf->wav_path, "wb");
155 if (!wav->f) {
156 dolog ("Failed to open wave file `%s'\nReason: %s\n",
157 conf->wav_path, strerror (errno));
158 g_free (wav->pcm_buf);
159 wav->pcm_buf = NULL;
160 return -1;
161 }
162
163 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
164 dolog ("wav_init_out: failed to write header\nReason: %s\n",
165 strerror(errno));
166 return -1;
167 }
168 return 0;
169}
170
171static void wav_fini_out (HWVoiceOut *hw)
172{
173 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
174 uint8_t rlen[4];
175 uint8_t dlen[4];
176 uint32_t datalen = wav->total_samples << hw->info.shift;
177 uint32_t rifflen = datalen + 36;
178
179 if (!wav->f) {
180 return;
181 }
182
183 le_store (rlen, rifflen, 4);
184 le_store (dlen, datalen, 4);
185
186 if (fseek (wav->f, 4, SEEK_SET)) {
187 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
188 strerror(errno));
189 goto doclose;
190 }
191 if (fwrite (rlen, 4, 1, wav->f) != 1) {
192 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
193 strerror (errno));
194 goto doclose;
195 }
196 if (fseek (wav->f, 32, SEEK_CUR)) {
197 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
198 strerror (errno));
199 goto doclose;
200 }
201 if (fwrite (dlen, 4, 1, wav->f) != 1) {
202 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
203 strerror (errno));
204 goto doclose;
205 }
206
207 doclose:
208 if (fclose (wav->f)) {
209 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
210 wav->f, strerror (errno));
211 }
212 wav->f = NULL;
213
214 g_free (wav->pcm_buf);
215 wav->pcm_buf = NULL;
216}
217
218static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
219{
220 (void) hw;
221 (void) cmd;
222 return 0;
223}
224
225static WAVConf glob_conf = {
226 .settings.freq = 44100,
227 .settings.nchannels = 2,
228 .settings.fmt = AUD_FMT_S16,
229 .wav_path = "qemu.wav"
230};
231
232static void *wav_audio_init (void)
233{
234 WAVConf *conf = g_malloc(sizeof(WAVConf));
235 *conf = glob_conf;
236 return conf;
237}
238
239static void wav_audio_fini (void *opaque)
240{
241 ldebug ("wav_fini");
242 g_free(opaque);
243}
244
245static struct audio_option wav_options[] = {
246 {
247 .name = "FREQUENCY",
248 .tag = AUD_OPT_INT,
249 .valp = &glob_conf.settings.freq,
250 .descr = "Frequency"
251 },
252 {
253 .name = "FORMAT",
254 .tag = AUD_OPT_FMT,
255 .valp = &glob_conf.settings.fmt,
256 .descr = "Format"
257 },
258 {
259 .name = "DAC_FIXED_CHANNELS",
260 .tag = AUD_OPT_INT,
261 .valp = &glob_conf.settings.nchannels,
262 .descr = "Number of channels (1 - mono, 2 - stereo)"
263 },
264 {
265 .name = "PATH",
266 .tag = AUD_OPT_STR,
267 .valp = &glob_conf.wav_path,
268 .descr = "Path to wave file"
269 },
270 { }
271};
272
273static struct audio_pcm_ops wav_pcm_ops = {
274 .init_out = wav_init_out,
275 .fini_out = wav_fini_out,
276 .run_out = wav_run_out,
277 .write = wav_write_out,
278 .ctl_out = wav_ctl_out,
279};
280
281static struct audio_driver wav_audio_driver = {
282 .name = "wav",
283 .descr = "WAV renderer http://wikipedia.org/wiki/WAV",
284 .options = wav_options,
285 .init = wav_audio_init,
286 .fini = wav_audio_fini,
287 .pcm_ops = &wav_pcm_ops,
288 .can_be_default = 0,
289 .max_voices_out = 1,
290 .max_voices_in = 0,
291 .voice_size_out = sizeof (WAVVoiceOut),
292 .voice_size_in = 0
293};
294
295static void register_audio_wav(void)
296{
297 audio_driver_register(&wav_audio_driver);
298}
299type_init(register_audio_wav);
300
