xref: /openbmc/qemu/audio/spiceaudio.c (revision 10500ce2)
1 /*
2  * Copyright (C) 2010 Red Hat, Inc.
3  *
4  * maintained by Gerd Hoffmann <kraxel@redhat.com>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License as
8  * published by the Free Software Foundation; either version 2 or
9  * (at your option) version 3 of the License.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #include "hw/hw.h"
21 #include "qemu/timer.h"
22 #include "ui/qemu-spice.h"
23 
24 #define AUDIO_CAP "spice"
25 #include "audio.h"
26 #include "audio_int.h"
27 
28 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
29 #define LINE_OUT_SAMPLES (480 * 4)
30 #else
31 #define LINE_OUT_SAMPLES (256 * 4)
32 #endif
33 
34 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
35 #define LINE_IN_SAMPLES (480 * 4)
36 #else
37 #define LINE_IN_SAMPLES (256 * 4)
38 #endif
39 
40 typedef struct SpiceRateCtl {
41     int64_t               start_ticks;
42     int64_t               bytes_sent;
43 } SpiceRateCtl;
44 
45 typedef struct SpiceVoiceOut {
46     HWVoiceOut            hw;
47     SpicePlaybackInstance sin;
48     SpiceRateCtl          rate;
49     int                   active;
50     uint32_t              *frame;
51     uint32_t              *fpos;
52     uint32_t              fsize;
53 } SpiceVoiceOut;
54 
55 typedef struct SpiceVoiceIn {
56     HWVoiceIn             hw;
57     SpiceRecordInstance   sin;
58     SpiceRateCtl          rate;
59     int                   active;
60     uint32_t              samples[LINE_IN_SAMPLES];
61 } SpiceVoiceIn;
62 
63 static const SpicePlaybackInterface playback_sif = {
64     .base.type          = SPICE_INTERFACE_PLAYBACK,
65     .base.description   = "playback",
66     .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
67     .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
68 };
69 
70 static const SpiceRecordInterface record_sif = {
71     .base.type          = SPICE_INTERFACE_RECORD,
72     .base.description   = "record",
73     .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
74     .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
75 };
76 
77 static void *spice_audio_init (void)
78 {
79     if (!using_spice) {
80         return NULL;
81     }
82     return &spice_audio_init;
83 }
84 
85 static void spice_audio_fini (void *opaque)
86 {
87     /* nothing */
88 }
89 
90 static void rate_start (SpiceRateCtl *rate)
91 {
92     memset (rate, 0, sizeof (*rate));
93     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
94 }
95 
96 static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
97 {
98     int64_t now;
99     int64_t ticks;
100     int64_t bytes;
101     int64_t samples;
102 
103     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
104     ticks = now - rate->start_ticks;
105     bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
106     samples = (bytes - rate->bytes_sent) >> info->shift;
107     if (samples < 0 || samples > 65536) {
108         error_report("Resetting rate control (%" PRId64 " samples)", samples);
109         rate_start (rate);
110         samples = 0;
111     }
112     rate->bytes_sent += samples << info->shift;
113     return samples;
114 }
115 
116 /* playback */
117 
118 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
119                          void *drv_opaque)
120 {
121     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
122     struct audsettings settings;
123 
124 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
125     settings.freq       = spice_server_get_best_playback_rate(NULL);
126 #else
127     settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
128 #endif
129     settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
130     settings.fmt        = AUD_FMT_S16;
131     settings.endianness = AUDIO_HOST_ENDIANNESS;
132 
133     audio_pcm_init_info (&hw->info, &settings);
134     hw->samples = LINE_OUT_SAMPLES;
135     out->active = 0;
136 
137     out->sin.base.sif = &playback_sif.base;
138     qemu_spice_add_interface (&out->sin.base);
139 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
140     spice_server_set_playback_rate(&out->sin, settings.freq);
141 #endif
142     return 0;
143 }
144 
145 static void line_out_fini (HWVoiceOut *hw)
146 {
147     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
148 
149     spice_server_remove_interface (&out->sin.base);
150 }
151 
152 static int line_out_run (HWVoiceOut *hw, int live)
153 {
154     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
155     int rpos, decr;
156     int samples;
157 
158     if (!live) {
159         return 0;
160     }
161 
162     decr = rate_get_samples (&hw->info, &out->rate);
163     decr = audio_MIN (live, decr);
164 
165     samples = decr;
166     rpos = hw->rpos;
167     while (samples) {
168         int left_till_end_samples = hw->samples - rpos;
169         int len = audio_MIN (samples, left_till_end_samples);
170 
171         if (!out->frame) {
172             spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
173             out->fpos = out->frame;
174         }
175         if (out->frame) {
176             len = audio_MIN (len, out->fsize);
177             hw->clip (out->fpos, hw->mix_buf + rpos, len);
178             out->fsize -= len;
179             out->fpos  += len;
180             if (out->fsize == 0) {
181                 spice_server_playback_put_samples (&out->sin, out->frame);
182                 out->frame = out->fpos = NULL;
183             }
184         }
185         rpos = (rpos + len) % hw->samples;
186         samples -= len;
187     }
188     hw->rpos = rpos;
189     return decr;
190 }
191 
192 static int line_out_write (SWVoiceOut *sw, void *buf, int len)
193 {
194     return audio_pcm_sw_write (sw, buf, len);
195 }
196 
197 static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
198 {
199     SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
200 
201     switch (cmd) {
202     case VOICE_ENABLE:
203         if (out->active) {
204             break;
205         }
206         out->active = 1;
207         rate_start (&out->rate);
208         spice_server_playback_start (&out->sin);
209         break;
210     case VOICE_DISABLE:
211         if (!out->active) {
212             break;
213         }
214         out->active = 0;
215         if (out->frame) {
216             memset (out->fpos, 0, out->fsize << 2);
217             spice_server_playback_put_samples (&out->sin, out->frame);
218             out->frame = out->fpos = NULL;
219         }
220         spice_server_playback_stop (&out->sin);
221         break;
222     case VOICE_VOLUME:
223         {
224 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
225             SWVoiceOut *sw;
226             va_list ap;
227             uint16_t vol[2];
228 
229             va_start (ap, cmd);
230             sw = va_arg (ap, SWVoiceOut *);
231             va_end (ap);
232 
233             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
234             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
235             spice_server_playback_set_volume (&out->sin, 2, vol);
236             spice_server_playback_set_mute (&out->sin, sw->vol.mute);
237 #endif
238             break;
239         }
240     }
241 
242     return 0;
243 }
244 
245 /* record */
246 
247 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
248 {
249     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
250     struct audsettings settings;
251 
252 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
253     settings.freq       = spice_server_get_best_record_rate(NULL);
254 #else
255     settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
256 #endif
257     settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
258     settings.fmt        = AUD_FMT_S16;
259     settings.endianness = AUDIO_HOST_ENDIANNESS;
260 
261     audio_pcm_init_info (&hw->info, &settings);
262     hw->samples = LINE_IN_SAMPLES;
263     in->active = 0;
264 
265     in->sin.base.sif = &record_sif.base;
266     qemu_spice_add_interface (&in->sin.base);
267 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
268     spice_server_set_record_rate(&in->sin, settings.freq);
269 #endif
270     return 0;
271 }
272 
273 static void line_in_fini (HWVoiceIn *hw)
274 {
275     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
276 
277     spice_server_remove_interface (&in->sin.base);
278 }
279 
280 static int line_in_run (HWVoiceIn *hw)
281 {
282     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
283     int num_samples;
284     int ready;
285     int len[2];
286     uint64_t delta_samp;
287     const uint32_t *samples;
288 
289     if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
290         return 0;
291     }
292 
293     delta_samp = rate_get_samples (&hw->info, &in->rate);
294     num_samples = audio_MIN (num_samples, delta_samp);
295 
296     ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
297     samples = in->samples;
298     if (ready == 0) {
299         static const uint32_t silence[LINE_IN_SAMPLES];
300         samples = silence;
301         ready = LINE_IN_SAMPLES;
302     }
303 
304     num_samples = audio_MIN (ready, num_samples);
305 
306     if (hw->wpos + num_samples > hw->samples) {
307         len[0] = hw->samples - hw->wpos;
308         len[1] = num_samples - len[0];
309     } else {
310         len[0] = num_samples;
311         len[1] = 0;
312     }
313 
314     hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
315 
316     if (len[1]) {
317         hw->conv (hw->conv_buf, samples + len[0], len[1]);
318     }
319 
320     hw->wpos = (hw->wpos + num_samples) % hw->samples;
321 
322     return num_samples;
323 }
324 
325 static int line_in_read (SWVoiceIn *sw, void *buf, int size)
326 {
327     return audio_pcm_sw_read (sw, buf, size);
328 }
329 
330 static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
331 {
332     SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
333 
334     switch (cmd) {
335     case VOICE_ENABLE:
336         if (in->active) {
337             break;
338         }
339         in->active = 1;
340         rate_start (&in->rate);
341         spice_server_record_start (&in->sin);
342         break;
343     case VOICE_DISABLE:
344         if (!in->active) {
345             break;
346         }
347         in->active = 0;
348         spice_server_record_stop (&in->sin);
349         break;
350     case VOICE_VOLUME:
351         {
352 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
353             SWVoiceIn *sw;
354             va_list ap;
355             uint16_t vol[2];
356 
357             va_start (ap, cmd);
358             sw = va_arg (ap, SWVoiceIn *);
359             va_end (ap);
360 
361             vol[0] = sw->vol.l / ((1ULL << 16) + 1);
362             vol[1] = sw->vol.r / ((1ULL << 16) + 1);
363             spice_server_record_set_volume (&in->sin, 2, vol);
364             spice_server_record_set_mute (&in->sin, sw->vol.mute);
365 #endif
366             break;
367         }
368     }
369 
370     return 0;
371 }
372 
373 static struct audio_option audio_options[] = {
374     { /* end of list */ },
375 };
376 
377 static struct audio_pcm_ops audio_callbacks = {
378     .init_out = line_out_init,
379     .fini_out = line_out_fini,
380     .run_out  = line_out_run,
381     .write    = line_out_write,
382     .ctl_out  = line_out_ctl,
383 
384     .init_in  = line_in_init,
385     .fini_in  = line_in_fini,
386     .run_in   = line_in_run,
387     .read     = line_in_read,
388     .ctl_in   = line_in_ctl,
389 };
390 
391 struct audio_driver spice_audio_driver = {
392     .name           = "spice",
393     .descr          = "spice audio driver",
394     .options        = audio_options,
395     .init           = spice_audio_init,
396     .fini           = spice_audio_fini,
397     .pcm_ops        = &audio_callbacks,
398     .max_voices_out = 1,
399     .max_voices_in  = 1,
400     .voice_size_out = sizeof (SpiceVoiceOut),
401     .voice_size_in  = sizeof (SpiceVoiceIn),
402 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
403     .ctl_caps       = VOICE_VOLUME_CAP
404 #endif
405 };
406 
407 void qemu_spice_audio_init (void)
408 {
409     spice_audio_driver.can_be_default = 1;
410 }
411