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6ed4f044 DR |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com> | |
0254651d | 5 | * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> |
6ed4f044 DR |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
9cd9f6b7 | 22 | #include "protocol.h" |
45c59c8b BV |
23 | #include "libsigrok.h" |
24 | #include "libsigrok-internal.h" | |
6ed4f044 | 25 | |
9cd9f6b7 AG |
26 | #include <stdlib.h> |
27 | #include <unistd.h> | |
28 | #include <string.h> | |
472bbb46 | 29 | |
9cd9f6b7 | 30 | #define DEFAULT_PROBES 2 |
0254651d UH |
31 | #define SAMPLE_WIDTH 16 |
32 | #define DEFAULT_SAMPLERATE 44100 | |
33 | // #define AUDIO_DEV "plughw:0,0" | |
34 | #define AUDIO_DEV "default" | |
a4cfb10f | 35 | |
915f7cc8 | 36 | static const int hwcaps[] = { |
5a2326a7 UH |
37 | SR_HWCAP_SAMPLERATE, |
38 | SR_HWCAP_LIMIT_SAMPLES, | |
39 | SR_HWCAP_CONTINUOUS, | |
0254651d | 40 | 0, |
6ed4f044 DR |
41 | }; |
42 | ||
0254651d | 43 | static const char *probe_names[] = { |
78693401 | 44 | "Channel 0", "Channel 1", |
464d12c7 KS |
45 | NULL, |
46 | }; | |
47 | ||
0254651d UH |
48 | SR_PRIV struct sr_dev_driver alsa_driver_info; |
49 | static struct sr_dev_driver *di = &alsa_driver_info; | |
6ed4f044 | 50 | |
0254651d UH |
51 | static int clear_instances(void) |
52 | { | |
53 | /* TODO */ | |
54 | ||
55 | return SR_OK; | |
56 | } | |
57 | ||
34f06b90 | 58 | static int hw_init(struct sr_context *sr_ctx) |
6ed4f044 | 59 | { |
0254651d | 60 | struct drv_context *drvc; |
6ed4f044 | 61 | |
0254651d UH |
62 | if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) { |
63 | sr_err("Driver context malloc failed."); | |
886a52b6 | 64 | return SR_ERR_MALLOC; |
92b3101c | 65 | } |
6ed4f044 | 66 | |
0254651d UH |
67 | drvc->sr_ctx = sr_ctx; |
68 | di->priv = drvc; | |
69 | ||
70 | return SR_OK; | |
71 | } | |
72 | ||
73 | static GSList *hw_scan(GSList *options) | |
74 | { | |
75 | struct drv_context *drvc; | |
76 | struct dev_context *devc; | |
77 | struct sr_dev_inst *sdi; | |
78 | struct sr_probe *probe; | |
79 | GSList *devices; | |
80 | int i; | |
81 | ||
82 | (void)options; | |
83 | ||
84 | drvc = di->priv; | |
85 | drvc->instances = NULL; | |
86 | ||
87 | devices = NULL; | |
88 | ||
89 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
90 | sr_err("Device context malloc failed."); | |
91 | return NULL; | |
92 | } | |
93 | ||
ea9cfed7 | 94 | if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL))) { |
0254651d UH |
95 | sr_err("Failed to create device instance."); |
96 | return NULL; | |
ea9cfed7 | 97 | } |
6ed4f044 | 98 | |
0254651d UH |
99 | /* Set the samplerate to a default value for now. */ |
100 | devc->cur_samplerate = DEFAULT_SAMPLERATE; | |
9cd9f6b7 | 101 | devc->num_probes = DEFAULT_PROBES; |
0254651d UH |
102 | |
103 | sdi->priv = devc; | |
104 | sdi->driver = di; | |
6ed4f044 | 105 | |
0254651d UH |
106 | for (i = 0; probe_names[i]; i++) { |
107 | if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, | |
108 | probe_names[i]))) { | |
109 | sr_err("Failed to create probe."); | |
110 | return NULL; | |
111 | } | |
112 | sdi->probes = g_slist_append(sdi->probes, probe); | |
113 | } | |
6ed4f044 | 114 | |
0254651d UH |
115 | drvc->instances = g_slist_append(drvc->instances, sdi); |
116 | devices = g_slist_append(devices, sdi); | |
ffedd0bf | 117 | |
0254651d | 118 | return devices; |
6ed4f044 DR |
119 | } |
120 | ||
0254651d | 121 | static GSList *hw_dev_list(void) |
6ed4f044 | 122 | { |
0254651d UH |
123 | struct drv_context *drvc; |
124 | ||
125 | drvc = di->priv; | |
126 | ||
127 | return drvc->instances; | |
128 | } | |
129 | ||
130 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
131 | { | |
132 | struct dev_context *devc; | |
ebc34738 | 133 | int ret; |
6ed4f044 | 134 | |
0254651d | 135 | devc = sdi->priv; |
6ed4f044 | 136 | |
0254651d UH |
137 | sr_dbg("Opening audio device '%s' for stream capture.", AUDIO_DEV); |
138 | ret = snd_pcm_open(&devc->capture_handle, AUDIO_DEV, | |
ea9cfed7 | 139 | SND_PCM_STREAM_CAPTURE, 0); |
ebc34738 | 140 | if (ret < 0) { |
0254651d | 141 | sr_err("Can't open audio device: %s.", snd_strerror(ret)); |
e46b8fb1 | 142 | return SR_ERR; |
6ed4f044 DR |
143 | } |
144 | ||
0254651d UH |
145 | sr_dbg("Allocating hardware parameter structure."); |
146 | ret = snd_pcm_hw_params_malloc(&devc->hw_params); | |
ebc34738 | 147 | if (ret < 0) { |
0254651d | 148 | sr_err("Can't allocate hardware parameter structure: %s.", |
ebc34738 | 149 | snd_strerror(ret)); |
886a52b6 | 150 | return SR_ERR_MALLOC; |
6ed4f044 DR |
151 | } |
152 | ||
0254651d UH |
153 | sr_dbg("Initializing hardware parameter structure."); |
154 | ret = snd_pcm_hw_params_any(devc->capture_handle, devc->hw_params); | |
ebc34738 | 155 | if (ret < 0) { |
0254651d | 156 | sr_err("Can't initialize hardware parameter structure: %s.", |
472bbb46 | 157 | snd_strerror(ret)); |
e46b8fb1 | 158 | return SR_ERR; |
6ed4f044 DR |
159 | } |
160 | ||
e46b8fb1 | 161 | return SR_OK; |
6ed4f044 DR |
162 | } |
163 | ||
0254651d | 164 | static int hw_dev_close(struct sr_dev_inst *sdi) |
6ed4f044 | 165 | { |
0254651d UH |
166 | int ret; |
167 | struct dev_context *devc; | |
6ed4f044 | 168 | |
0254651d UH |
169 | devc = sdi->priv; |
170 | ||
171 | sr_dbg("Closing device."); | |
6ed4f044 | 172 | |
0254651d UH |
173 | if (devc->hw_params) { |
174 | sr_dbg("Freeing hardware parameters."); | |
175 | snd_pcm_hw_params_free(devc->hw_params); | |
176 | } else { | |
177 | sr_dbg("No hardware parameters, no need to free."); | |
697785d1 UH |
178 | } |
179 | ||
0254651d UH |
180 | if (devc->capture_handle) { |
181 | sr_dbg("Closing PCM device."); | |
182 | if ((ret = snd_pcm_close(devc->capture_handle)) < 0) { | |
183 | sr_err("Failed to close device: %s.", | |
184 | snd_strerror(ret)); | |
185 | } | |
186 | } else { | |
187 | sr_dbg("No capture handle, no need to close audio device."); | |
188 | } | |
697785d1 UH |
189 | |
190 | return SR_OK; | |
6ed4f044 DR |
191 | } |
192 | ||
57ab7d9f | 193 | static int hw_cleanup(void) |
6ed4f044 | 194 | { |
0254651d | 195 | clear_instances(); |
57ab7d9f UH |
196 | |
197 | return SR_OK; | |
6ed4f044 DR |
198 | } |
199 | ||
0254651d UH |
200 | static int hw_info_get(int info_id, const void **data, |
201 | const struct sr_dev_inst *sdi) | |
6ed4f044 | 202 | { |
0254651d | 203 | struct dev_context *devc; |
6ed4f044 | 204 | |
0254651d UH |
205 | if (info_id != SR_DI_HWCAPS) /* For SR_DI_HWCAPS sdi will be NULL. */ |
206 | devc = sdi->priv; | |
6ed4f044 | 207 | |
0254651d UH |
208 | switch (info_id) { |
209 | case SR_DI_HWCAPS: | |
210 | *data = hwcaps; | |
6ed4f044 | 211 | break; |
5a2326a7 | 212 | case SR_DI_NUM_PROBES: |
9cd9f6b7 | 213 | *data = GINT_TO_POINTER(DEFAULT_PROBES); |
6ed4f044 | 214 | break; |
464d12c7 | 215 | case SR_DI_PROBE_NAMES: |
0254651d | 216 | *data = probe_names; |
464d12c7 | 217 | break; |
5a2326a7 | 218 | case SR_DI_CUR_SAMPLERATE: |
0254651d | 219 | *data = &devc->cur_samplerate; |
6ed4f044 | 220 | break; |
0254651d UH |
221 | default: |
222 | sr_err("Invalid info_id: %d.", info_id); | |
223 | return SR_ERR_ARG; | |
6ed4f044 DR |
224 | } |
225 | ||
0254651d | 226 | return SR_OK; |
6ed4f044 DR |
227 | } |
228 | ||
0254651d UH |
229 | static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap, |
230 | const void *value) | |
6ed4f044 | 231 | { |
0254651d | 232 | struct dev_context *devc; |
6ed4f044 | 233 | |
0254651d | 234 | devc = sdi->priv; |
6ed4f044 | 235 | |
ffedd0bf | 236 | switch (hwcap) { |
5a2326a7 | 237 | case SR_HWCAP_SAMPLERATE: |
0254651d UH |
238 | devc->cur_samplerate = *(const uint64_t *)value; |
239 | break; | |
5a2326a7 | 240 | case SR_HWCAP_LIMIT_SAMPLES: |
0254651d UH |
241 | devc->limit_samples = *(const uint64_t *)value; |
242 | break; | |
6ed4f044 | 243 | default: |
0254651d | 244 | sr_err("Unknown capability: %d.", hwcap); |
e46b8fb1 | 245 | return SR_ERR; |
6ed4f044 | 246 | } |
0254651d UH |
247 | |
248 | return SR_OK; | |
6ed4f044 DR |
249 | } |
250 | ||
0254651d UH |
251 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, |
252 | void *cb_data) | |
6ed4f044 | 253 | { |
b9c735a2 UH |
254 | struct sr_datafeed_packet packet; |
255 | struct sr_datafeed_header header; | |
0254651d UH |
256 | struct sr_datafeed_meta_analog meta; |
257 | struct dev_context *devc; | |
258 | int count, ret; | |
6ed4f044 | 259 | |
0254651d UH |
260 | devc = sdi->priv; |
261 | devc->cb_data = cb_data; | |
6ed4f044 | 262 | |
0254651d UH |
263 | sr_dbg("Setting audio access type to RW/interleaved."); |
264 | ret = snd_pcm_hw_params_set_access(devc->capture_handle, | |
265 | devc->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); | |
ebc34738 | 266 | if (ret < 0) { |
0254651d | 267 | sr_err("Can't set audio access type: %s.", snd_strerror(ret)); |
e46b8fb1 | 268 | return SR_ERR; |
6ed4f044 DR |
269 | } |
270 | ||
0254651d UH |
271 | /* FIXME: Hardcoded for 16bits. */ |
272 | sr_dbg("Setting audio sample format to signed 16bit (little endian)."); | |
273 | ret = snd_pcm_hw_params_set_format(devc->capture_handle, | |
274 | devc->hw_params, SND_PCM_FORMAT_S16_LE); | |
ebc34738 | 275 | if (ret < 0) { |
0254651d | 276 | sr_err("Can't set audio sample format: %s.", snd_strerror(ret)); |
e46b8fb1 | 277 | return SR_ERR; |
6ed4f044 DR |
278 | } |
279 | ||
0254651d UH |
280 | sr_dbg("Setting audio samplerate to %" PRIu64 "Hz.", |
281 | devc->cur_samplerate); | |
0d6ff103 AG |
282 | ret = snd_pcm_hw_params_set_rate(devc->capture_handle, devc->hw_params, |
283 | (unsigned int)devc->cur_samplerate, 0); | |
ebc34738 | 284 | if (ret < 0) { |
0254651d | 285 | sr_err("Can't set audio sample rate: %s.", snd_strerror(ret)); |
e46b8fb1 | 286 | return SR_ERR; |
6ed4f044 DR |
287 | } |
288 | ||
9cd9f6b7 | 289 | sr_dbg("Setting audio channel count to %d.", devc->num_probes); |
0254651d | 290 | ret = snd_pcm_hw_params_set_channels(devc->capture_handle, |
9cd9f6b7 | 291 | devc->hw_params, devc->num_probes); |
ebc34738 | 292 | if (ret < 0) { |
0254651d | 293 | sr_err("Can't set channel count: %s.", snd_strerror(ret)); |
e46b8fb1 | 294 | return SR_ERR; |
6ed4f044 DR |
295 | } |
296 | ||
0254651d UH |
297 | sr_dbg("Setting audio parameters."); |
298 | ret = snd_pcm_hw_params(devc->capture_handle, devc->hw_params); | |
ebc34738 | 299 | if (ret < 0) { |
0254651d | 300 | sr_err("Can't set parameters: %s.", snd_strerror(ret)); |
e46b8fb1 | 301 | return SR_ERR; |
6ed4f044 DR |
302 | } |
303 | ||
0254651d UH |
304 | sr_dbg("Preparing audio interface for use."); |
305 | ret = snd_pcm_prepare(devc->capture_handle); | |
ebc34738 | 306 | if (ret < 0) { |
0254651d | 307 | sr_err("Can't prepare audio interface for use: %s.", |
ebc34738 | 308 | snd_strerror(ret)); |
e46b8fb1 | 309 | return SR_ERR; |
6ed4f044 DR |
310 | } |
311 | ||
0254651d | 312 | count = snd_pcm_poll_descriptors_count(devc->capture_handle); |
6ed4f044 | 313 | if (count < 1) { |
472bbb46 | 314 | sr_err("Unable to obtain poll descriptors count."); |
e46b8fb1 | 315 | return SR_ERR; |
6ed4f044 | 316 | } |
0254651d | 317 | sr_spew("Obtained poll descriptor count: %d.", count); |
6ed4f044 | 318 | |
0254651d UH |
319 | if (!(devc->ufds = g_try_malloc(count * sizeof(struct pollfd)))) { |
320 | sr_err("Failed to malloc ufds."); | |
e46b8fb1 | 321 | return SR_ERR_MALLOC; |
92b3101c | 322 | } |
6ed4f044 | 323 | |
0254651d UH |
324 | sr_err("Getting %d poll descriptors.", count); |
325 | ret = snd_pcm_poll_descriptors(devc->capture_handle, devc->ufds, count); | |
ebc34738 | 326 | if (ret < 0) { |
0254651d | 327 | sr_err("Unable to obtain poll descriptors: %s.", |
ebc34738 | 328 | snd_strerror(ret)); |
0254651d | 329 | g_free(devc->ufds); |
e46b8fb1 | 330 | return SR_ERR; |
6ed4f044 DR |
331 | } |
332 | ||
0254651d UH |
333 | /* Send header packet to the session bus. */ |
334 | sr_dbg("Sending SR_DF_HEADER packet."); | |
5a2326a7 | 335 | packet.type = SR_DF_HEADER; |
0254651d | 336 | packet.payload = (uint8_t *)&header; |
6ed4f044 DR |
337 | header.feed_version = 1; |
338 | gettimeofday(&header.starttime, NULL); | |
0254651d UH |
339 | sr_session_send(devc->cb_data, &packet); |
340 | ||
341 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
342 | sr_dbg("Sending SR_DF_META_ANALOG packet."); | |
343 | packet.type = SR_DF_META_ANALOG; | |
344 | packet.payload = &meta; | |
9cd9f6b7 | 345 | meta.num_probes = devc->num_probes; |
0254651d UH |
346 | sr_session_send(devc->cb_data, &packet); |
347 | ||
348 | /* Poll every 10ms, or whenever some data comes in. */ | |
349 | sr_source_add(devc->ufds[0].fd, devc->ufds[0].events, 10, | |
9cd9f6b7 | 350 | alsa_receive_data, (void *)sdi); |
0254651d UH |
351 | |
352 | // g_free(devc->ufds); /* FIXME */ | |
6ed4f044 | 353 | |
e46b8fb1 | 354 | return SR_OK; |
6ed4f044 DR |
355 | } |
356 | ||
0254651d | 357 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) |
6ed4f044 | 358 | { |
0254651d UH |
359 | struct sr_datafeed_packet packet; |
360 | struct dev_context *devc; | |
361 | ||
362 | devc = sdi->priv; | |
363 | devc->cb_data = cb_data; | |
364 | ||
365 | sr_source_remove(devc->ufds[0].fd); | |
366 | ||
367 | /* Send end packet to the session bus. */ | |
368 | sr_dbg("Sending SR_DF_END packet."); | |
369 | packet.type = SR_DF_END; | |
370 | sr_session_send(cb_data, &packet); | |
3010f21c UH |
371 | |
372 | return SR_OK; | |
6ed4f044 DR |
373 | } |
374 | ||
c09f0b57 | 375 | SR_PRIV struct sr_dev_driver alsa_driver_info = { |
e519ba86 UH |
376 | .name = "alsa", |
377 | .longname = "ALSA driver", | |
378 | .api_version = 1, | |
379 | .init = hw_init, | |
380 | .cleanup = hw_cleanup, | |
0254651d UH |
381 | .scan = hw_scan, |
382 | .dev_list = hw_dev_list, | |
383 | .dev_clear = clear_instances, | |
e7eb703f UH |
384 | .dev_open = hw_dev_open, |
385 | .dev_close = hw_dev_close, | |
0254651d | 386 | .info_get = hw_info_get, |
a9a245b4 | 387 | .dev_config_set = hw_dev_config_set, |
69040b7c UH |
388 | .dev_acquisition_start = hw_dev_acquisition_start, |
389 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
0254651d | 390 | .priv = NULL, |
6ed4f044 | 391 | }; |