virtiofsd: Add `sigreturn` to the seccomp whitelist
[qemu.git] / audio / spiceaudio.c
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 "qemu/osdep.h"
21 #include "qemu/host-utils.h"
22 #include "qemu/module.h"
23 #include "qemu/error-report.h"
24 #include "qemu/timer.h"
25 #include "ui/qemu-spice.h"
26
27 #define AUDIO_CAP "spice"
28 #include "audio.h"
29 #include "audio_int.h"
30
31 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
32 #define LINE_OUT_SAMPLES (480 * 4)
33 #else
34 #define LINE_OUT_SAMPLES (256 * 4)
35 #endif
36
37 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
38 #define LINE_IN_SAMPLES (480 * 4)
39 #else
40 #define LINE_IN_SAMPLES (256 * 4)
41 #endif
42
43 typedef struct SpiceVoiceOut {
44 HWVoiceOut hw;
45 SpicePlaybackInstance sin;
46 RateCtl rate;
47 int active;
48 uint32_t *frame;
49 uint32_t fpos;
50 uint32_t fsize;
51 } SpiceVoiceOut;
52
53 typedef struct SpiceVoiceIn {
54 HWVoiceIn hw;
55 SpiceRecordInstance sin;
56 RateCtl rate;
57 int active;
58 } SpiceVoiceIn;
59
60 static const SpicePlaybackInterface playback_sif = {
61 .base.type = SPICE_INTERFACE_PLAYBACK,
62 .base.description = "playback",
63 .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
64 .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
65 };
66
67 static const SpiceRecordInterface record_sif = {
68 .base.type = SPICE_INTERFACE_RECORD,
69 .base.description = "record",
70 .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
71 .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
72 };
73
74 static void *spice_audio_init(Audiodev *dev)
75 {
76 if (!using_spice) {
77 return NULL;
78 }
79 return &spice_audio_init;
80 }
81
82 static void spice_audio_fini (void *opaque)
83 {
84 /* nothing */
85 }
86
87 /* playback */
88
89 static int line_out_init(HWVoiceOut *hw, struct audsettings *as,
90 void *drv_opaque)
91 {
92 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
93 struct audsettings settings;
94
95 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
96 settings.freq = spice_server_get_best_playback_rate(NULL);
97 #else
98 settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ;
99 #endif
100 settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN;
101 settings.fmt = AUDIO_FORMAT_S16;
102 settings.endianness = AUDIO_HOST_ENDIANNESS;
103
104 audio_pcm_init_info (&hw->info, &settings);
105 hw->samples = LINE_OUT_SAMPLES;
106 out->active = 0;
107
108 out->sin.base.sif = &playback_sif.base;
109 qemu_spice.add_interface(&out->sin.base);
110 #if SPICE_INTERFACE_PLAYBACK_MAJOR > 1 || SPICE_INTERFACE_PLAYBACK_MINOR >= 3
111 spice_server_set_playback_rate(&out->sin, settings.freq);
112 #endif
113 return 0;
114 }
115
116 static void line_out_fini (HWVoiceOut *hw)
117 {
118 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
119
120 spice_server_remove_interface (&out->sin.base);
121 }
122
123 static size_t line_out_get_free(HWVoiceOut *hw)
124 {
125 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
126
127 return audio_rate_peek_bytes(&out->rate, &hw->info);
128 }
129
130 static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
131 {
132 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
133
134 if (!out->frame) {
135 spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
136 out->fpos = 0;
137 }
138
139 if (out->frame) {
140 *size = MIN((out->fsize - out->fpos) << 2, *size);
141 }
142
143 return out->frame + out->fpos;
144 }
145
146 static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
147 {
148 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
149
150 audio_rate_add_bytes(&out->rate, size);
151
152 if (buf) {
153 assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
154 out->fpos += size >> 2;
155
156 if (out->fpos == out->fsize) { /* buffer full */
157 spice_server_playback_put_samples(&out->sin, out->frame);
158 out->frame = NULL;
159 }
160 }
161
162 return size;
163 }
164
165 static void line_out_enable(HWVoiceOut *hw, bool enable)
166 {
167 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
168
169 if (enable) {
170 if (out->active) {
171 return;
172 }
173 out->active = 1;
174 audio_rate_start(&out->rate);
175 spice_server_playback_start (&out->sin);
176 } else {
177 if (!out->active) {
178 return;
179 }
180 out->active = 0;
181 if (out->frame) {
182 memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
183 spice_server_playback_put_samples (&out->sin, out->frame);
184 out->frame = NULL;
185 }
186 spice_server_playback_stop (&out->sin);
187 }
188 }
189
190 #if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
191 static void line_out_volume(HWVoiceOut *hw, Volume *vol)
192 {
193 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
194 uint16_t svol[2];
195
196 assert(vol->channels == 2);
197 svol[0] = vol->vol[0] * 257;
198 svol[1] = vol->vol[1] * 257;
199 spice_server_playback_set_volume(&out->sin, 2, svol);
200 spice_server_playback_set_mute(&out->sin, vol->mute);
201 }
202 #endif
203
204 /* record */
205
206 static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
207 {
208 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
209 struct audsettings settings;
210
211 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
212 settings.freq = spice_server_get_best_record_rate(NULL);
213 #else
214 settings.freq = SPICE_INTERFACE_RECORD_FREQ;
215 #endif
216 settings.nchannels = SPICE_INTERFACE_RECORD_CHAN;
217 settings.fmt = AUDIO_FORMAT_S16;
218 settings.endianness = AUDIO_HOST_ENDIANNESS;
219
220 audio_pcm_init_info (&hw->info, &settings);
221 hw->samples = LINE_IN_SAMPLES;
222 in->active = 0;
223
224 in->sin.base.sif = &record_sif.base;
225 qemu_spice.add_interface(&in->sin.base);
226 #if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
227 spice_server_set_record_rate(&in->sin, settings.freq);
228 #endif
229 return 0;
230 }
231
232 static void line_in_fini (HWVoiceIn *hw)
233 {
234 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
235
236 spice_server_remove_interface (&in->sin.base);
237 }
238
239 static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
240 {
241 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
242 uint64_t to_read = audio_rate_get_bytes(&in->rate, &hw->info, len) >> 2;
243 size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
244
245 /*
246 * If the client didn't send new frames, it most likely disconnected.
247 * Generate silence in this case to avoid a stalled audio stream.
248 */
249 if (ready == 0) {
250 memset(buf, 0, to_read << 2);
251 ready = to_read;
252 }
253
254 return ready << 2;
255 }
256
257 static void line_in_enable(HWVoiceIn *hw, bool enable)
258 {
259 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
260
261 if (enable) {
262 if (in->active) {
263 return;
264 }
265 in->active = 1;
266 audio_rate_start(&in->rate);
267 spice_server_record_start (&in->sin);
268 } else {
269 if (!in->active) {
270 return;
271 }
272 in->active = 0;
273 spice_server_record_stop (&in->sin);
274 }
275 }
276
277 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
278 static void line_in_volume(HWVoiceIn *hw, Volume *vol)
279 {
280 SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw);
281 uint16_t svol[2];
282
283 assert(vol->channels == 2);
284 svol[0] = vol->vol[0] * 257;
285 svol[1] = vol->vol[1] * 257;
286 spice_server_record_set_volume(&in->sin, 2, svol);
287 spice_server_record_set_mute(&in->sin, vol->mute);
288 }
289 #endif
290
291 static struct audio_pcm_ops audio_callbacks = {
292 .init_out = line_out_init,
293 .fini_out = line_out_fini,
294 .write = audio_generic_write,
295 .buffer_get_free = line_out_get_free,
296 .get_buffer_out = line_out_get_buffer,
297 .put_buffer_out = line_out_put_buffer,
298 .enable_out = line_out_enable,
299 #if (SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && \
300 (SPICE_INTERFACE_PLAYBACK_MINOR >= 2)
301 .volume_out = line_out_volume,
302 #endif
303
304 .init_in = line_in_init,
305 .fini_in = line_in_fini,
306 .read = line_in_read,
307 .run_buffer_in = audio_generic_run_buffer_in,
308 .enable_in = line_in_enable,
309 #if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
310 .volume_in = line_in_volume,
311 #endif
312 };
313
314 static struct audio_driver spice_audio_driver = {
315 .name = "spice",
316 .descr = "spice audio driver",
317 .init = spice_audio_init,
318 .fini = spice_audio_fini,
319 .pcm_ops = &audio_callbacks,
320 .max_voices_out = 1,
321 .max_voices_in = 1,
322 .voice_size_out = sizeof (SpiceVoiceOut),
323 .voice_size_in = sizeof (SpiceVoiceIn),
324 };
325
326 static void register_audio_spice(void)
327 {
328 audio_driver_register(&spice_audio_driver);
329 }
330 type_init(register_audio_spice);
331
332 module_dep("ui-spice-core");