jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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
43typedef 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
53typedef struct SpiceVoiceIn {
54 HWVoiceIn hw;
55 SpiceRecordInstance sin;
56 RateCtl rate;
57 int active;
58} SpiceVoiceIn;
59
60static 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
67static 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
74static void *spice_audio_init(Audiodev *dev)
75{
76 if (!using_spice) {
77 return NULL;
78 }
79 return &spice_audio_init;
80}
81
82static void spice_audio_fini (void *opaque)
83{
84 /* nothing */
85}
86
87/* playback */
88
89static 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
116static 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
123static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size)
124{
125 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
126
127 if (!out->frame) {
128 spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize);
129 out->fpos = 0;
130 }
131
132 if (out->frame) {
133 *size = audio_rate_get_bytes(
134 &hw->info, &out->rate,
135 (out->fsize - out->fpos) * hw->info.bytes_per_frame);
136 } else {
137 audio_rate_start(&out->rate);
138 }
139 return out->frame + out->fpos;
140}
141
142static size_t line_out_put_buffer(HWVoiceOut *hw, void *buf, size_t size)
143{
144 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
145
146 assert(buf == out->frame + out->fpos && out->fpos <= out->fsize);
147 out->fpos += size >> 2;
148
149 if (out->fpos == out->fsize) { /* buffer full */
150 spice_server_playback_put_samples(&out->sin, out->frame);
151 out->frame = NULL;
152 }
153
154 return size;
155}
156
157static void line_out_enable(HWVoiceOut *hw, bool enable)
158{
159 SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
160
161 if (enable) {
162 if (out->active) {
163 return;
164 }
165 out->active = 1;
166 audio_rate_start(&out->rate);
167 spice_server_playback_start (&out->sin);
168 } else {
169 if (!out->active) {
170 return;
171 }
172 out->active = 0;
173 if (out->frame) {
174 memset(out->frame + out->fpos, 0, (out->fsize - out->fpos) << 2);
175 spice_server_playback_put_samples (&out->sin, out->frame);
176 out->frame = NULL;
177 }
178 spice_server_playback_stop (&out->sin);
179 }
180}
181
182#if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
183static void line_out_volume(HWVoiceOut *hw, Volume *vol)
184{
185 SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw);
186 uint16_t svol[2];
187
188 assert(vol->channels == 2);
189 svol[0] = vol->vol[0] * 257;
190 svol[1] = vol->vol[1] * 257;
191 spice_server_playback_set_volume(&out->sin, 2, svol);
192 spice_server_playback_set_mute(&out->sin, vol->mute);
193}
194#endif
195
196/* record */
197
198static int line_in_init(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
199{
200 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
201 struct audsettings settings;
202
203#if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
204 settings.freq = spice_server_get_best_record_rate(NULL);
205#else
206 settings.freq = SPICE_INTERFACE_RECORD_FREQ;
207#endif
208 settings.nchannels = SPICE_INTERFACE_RECORD_CHAN;
209 settings.fmt = AUDIO_FORMAT_S16;
210 settings.endianness = AUDIO_HOST_ENDIANNESS;
211
212 audio_pcm_init_info (&hw->info, &settings);
213 hw->samples = LINE_IN_SAMPLES;
214 in->active = 0;
215
216 in->sin.base.sif = &record_sif.base;
217 qemu_spice_add_interface (&in->sin.base);
218#if SPICE_INTERFACE_RECORD_MAJOR > 2 || SPICE_INTERFACE_RECORD_MINOR >= 3
219 spice_server_set_record_rate(&in->sin, settings.freq);
220#endif
221 return 0;
222}
223
224static void line_in_fini (HWVoiceIn *hw)
225{
226 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
227
228 spice_server_remove_interface (&in->sin.base);
229}
230
231static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len)
232{
233 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
234 uint64_t to_read = audio_rate_get_bytes(&hw->info, &in->rate, len) >> 2;
235 size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read);
236
237 /* XXX: do we need this? */
238 if (ready == 0) {
239 memset(buf, 0, to_read << 2);
240 ready = to_read;
241 }
242
243 return ready << 2;
244}
245
246static void line_in_enable(HWVoiceIn *hw, bool enable)
247{
248 SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
249
250 if (enable) {
251 if (in->active) {
252 return;
253 }
254 in->active = 1;
255 audio_rate_start(&in->rate);
256 spice_server_record_start (&in->sin);
257 } else {
258 if (!in->active) {
259 return;
260 }
261 in->active = 0;
262 spice_server_record_stop (&in->sin);
263 }
264}
265
266#if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
267static void line_in_volume(HWVoiceIn *hw, Volume *vol)
268{
269 SpiceVoiceIn *in = container_of(hw, SpiceVoiceIn, hw);
270 uint16_t svol[2];
271
272 assert(vol->channels == 2);
273 svol[0] = vol->vol[0] * 257;
274 svol[1] = vol->vol[1] * 257;
275 spice_server_record_set_volume(&in->sin, 2, svol);
276 spice_server_record_set_mute(&in->sin, vol->mute);
277}
278#endif
279
280static struct audio_pcm_ops audio_callbacks = {
281 .init_out = line_out_init,
282 .fini_out = line_out_fini,
283 .write = audio_generic_write,
284 .get_buffer_out = line_out_get_buffer,
285 .put_buffer_out = line_out_put_buffer,
286 .enable_out = line_out_enable,
287#if (SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && \
288 (SPICE_INTERFACE_PLAYBACK_MINOR >= 2)
289 .volume_out = line_out_volume,
290#endif
291
292 .init_in = line_in_init,
293 .fini_in = line_in_fini,
294 .read = line_in_read,
295 .enable_in = line_in_enable,
296#if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
297 .volume_in = line_in_volume,
298#endif
299};
300
301static struct audio_driver spice_audio_driver = {
302 .name = "spice",
303 .descr = "spice audio driver",
304 .init = spice_audio_init,
305 .fini = spice_audio_fini,
306 .pcm_ops = &audio_callbacks,
307 .max_voices_out = 1,
308 .max_voices_in = 1,
309 .voice_size_out = sizeof (SpiceVoiceOut),
310 .voice_size_in = sizeof (SpiceVoiceIn),
311};
312
313void qemu_spice_audio_init (void)
314{
315 spice_audio_driver.can_be_default = 1;
316}
317
318static void register_audio_spice(void)
319{
320 audio_driver_register(&spice_audio_driver);
321}
322type_init(register_audio_spice);