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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
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 <sys/types.h> | |
21 | #include <sys/stat.h> | |
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/time.h> | |
25 | #include <zip.h> | |
26 | #include "libsigrok.h" | |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | #define LOG_PREFIX "virtual-session" | |
30 | ||
31 | /* size of payloads sent across the session bus */ | |
32 | /** @cond PRIVATE */ | |
33 | #define CHUNKSIZE (512 * 1024) | |
34 | /** @endcond */ | |
35 | ||
36 | struct session_vdev { | |
37 | char *sessionfile; | |
38 | char *capturefile; | |
39 | struct zip *archive; | |
40 | struct zip_file *capfile; | |
41 | int bytes_read; | |
42 | uint64_t samplerate; | |
43 | int unitsize; | |
44 | int num_probes; | |
45 | int cur_chunk; | |
46 | gboolean finished; | |
47 | }; | |
48 | ||
49 | static GSList *dev_insts = NULL; | |
50 | static const int hwcaps[] = { | |
51 | SR_CONF_CAPTUREFILE, | |
52 | SR_CONF_CAPTURE_UNITSIZE, | |
53 | SR_CONF_SAMPLERATE, | |
54 | }; | |
55 | ||
56 | static int receive_data(int fd, int revents, void *cb_data) | |
57 | { | |
58 | struct sr_dev_inst *sdi; | |
59 | struct session_vdev *vdev; | |
60 | struct sr_datafeed_packet packet; | |
61 | struct sr_datafeed_logic logic; | |
62 | struct zip_stat zs; | |
63 | GSList *l; | |
64 | int ret, got_data; | |
65 | char capturefile[16]; | |
66 | void *buf; | |
67 | ||
68 | (void)fd; | |
69 | (void)revents; | |
70 | ||
71 | got_data = FALSE; | |
72 | for (l = dev_insts; l; l = l->next) { | |
73 | sdi = l->data; | |
74 | vdev = sdi->priv; | |
75 | if (vdev->finished) | |
76 | /* Already done with this instance. */ | |
77 | continue; | |
78 | ||
79 | if (!vdev->capfile) { | |
80 | /* No capture file opened yet, or finished with the last | |
81 | * chunked one. */ | |
82 | if (vdev->cur_chunk == 0) { | |
83 | /* capturefile is always the unchunked base name. */ | |
84 | if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) { | |
85 | /* No chunks, just a single capture file. */ | |
86 | vdev->cur_chunk = 0; | |
87 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
88 | vdev->capturefile, 0))) | |
89 | return FALSE; | |
90 | sr_dbg("Opened %s.", vdev->capturefile); | |
91 | } else { | |
92 | /* Try as first chunk filename. */ | |
93 | snprintf(capturefile, 15, "%s-1", vdev->capturefile); | |
94 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
95 | vdev->cur_chunk = 1; | |
96 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
97 | capturefile, 0))) | |
98 | return FALSE; | |
99 | sr_dbg("Opened %s.", capturefile); | |
100 | } else { | |
101 | sr_err("No capture file '%s' in " "session file '%s'.", | |
102 | vdev->capturefile, vdev->sessionfile); | |
103 | return FALSE; | |
104 | } | |
105 | } | |
106 | } else { | |
107 | /* Capture data is chunked, advance to the next chunk. */ | |
108 | vdev->cur_chunk++; | |
109 | snprintf(capturefile, 15, "%s-%d", vdev->capturefile, | |
110 | vdev->cur_chunk); | |
111 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
112 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
113 | capturefile, 0))) | |
114 | return FALSE; | |
115 | sr_dbg("Opened %s.", capturefile); | |
116 | } else { | |
117 | /* We got all the chunks, finish up. */ | |
118 | vdev->finished = TRUE; | |
119 | continue; | |
120 | } | |
121 | } | |
122 | } | |
123 | ||
124 | if (!(buf = g_try_malloc(CHUNKSIZE))) { | |
125 | sr_err("%s: buf malloc failed", __func__); | |
126 | return FALSE; | |
127 | } | |
128 | ||
129 | ret = zip_fread(vdev->capfile, buf, | |
130 | CHUNKSIZE / vdev->unitsize * vdev->unitsize); | |
131 | if (ret > 0) { | |
132 | if (ret % vdev->unitsize != 0) | |
133 | sr_warn("Read size %d not a multiple of the" | |
134 | " unit size %d.", ret, vdev->unitsize); | |
135 | got_data = TRUE; | |
136 | packet.type = SR_DF_LOGIC; | |
137 | packet.payload = &logic; | |
138 | logic.length = ret; | |
139 | logic.unitsize = vdev->unitsize; | |
140 | logic.data = buf; | |
141 | vdev->bytes_read += ret; | |
142 | sr_session_send(cb_data, &packet); | |
143 | } else { | |
144 | /* done with this capture file */ | |
145 | zip_fclose(vdev->capfile); | |
146 | vdev->capfile = NULL; | |
147 | if (vdev->cur_chunk == 0) { | |
148 | /* It was the only file. */ | |
149 | vdev->finished = TRUE; | |
150 | } else { | |
151 | /* There might be more chunks, so don't fall through | |
152 | * to the SR_DF_END here. */ | |
153 | g_free(buf); | |
154 | return TRUE; | |
155 | } | |
156 | } | |
157 | g_free(buf); | |
158 | } | |
159 | ||
160 | if (!got_data) { | |
161 | packet.type = SR_DF_END; | |
162 | sr_session_send(cb_data, &packet); | |
163 | sr_session_source_remove(-1); | |
164 | } | |
165 | ||
166 | return TRUE; | |
167 | } | |
168 | ||
169 | /* driver callbacks */ | |
170 | ||
171 | static int init(struct sr_context *sr_ctx) | |
172 | { | |
173 | (void)sr_ctx; | |
174 | ||
175 | return SR_OK; | |
176 | } | |
177 | ||
178 | static int dev_clear(void) | |
179 | { | |
180 | GSList *l; | |
181 | ||
182 | for (l = dev_insts; l; l = l->next) | |
183 | sr_dev_inst_free(l->data); | |
184 | g_slist_free(dev_insts); | |
185 | dev_insts = NULL; | |
186 | ||
187 | return SR_OK; | |
188 | } | |
189 | ||
190 | static int dev_open(struct sr_dev_inst *sdi) | |
191 | { | |
192 | struct session_vdev *vdev; | |
193 | ||
194 | vdev = g_try_malloc0(sizeof(struct session_vdev)); | |
195 | sdi->priv = vdev; | |
196 | dev_insts = g_slist_append(dev_insts, sdi); | |
197 | ||
198 | return SR_OK; | |
199 | } | |
200 | ||
201 | static int dev_close(struct sr_dev_inst *sdi) | |
202 | { | |
203 | const struct session_vdev *const vdev = sdi->priv; | |
204 | g_free(vdev->sessionfile); | |
205 | g_free(vdev->capturefile); | |
206 | ||
207 | g_free(sdi->priv); | |
208 | sdi->priv = NULL; | |
209 | ||
210 | return SR_OK; | |
211 | } | |
212 | ||
213 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, | |
214 | const struct sr_probe_group *probe_group) | |
215 | { | |
216 | struct session_vdev *vdev; | |
217 | ||
218 | (void)probe_group; | |
219 | ||
220 | switch (id) { | |
221 | case SR_CONF_SAMPLERATE: | |
222 | if (sdi) { | |
223 | vdev = sdi->priv; | |
224 | *data = g_variant_new_uint64(vdev->samplerate); | |
225 | } else | |
226 | return SR_ERR; | |
227 | break; | |
228 | default: | |
229 | return SR_ERR_NA; | |
230 | } | |
231 | ||
232 | return SR_OK; | |
233 | } | |
234 | ||
235 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, | |
236 | const struct sr_probe_group *probe_group) | |
237 | { | |
238 | struct session_vdev *vdev; | |
239 | ||
240 | (void)probe_group; | |
241 | ||
242 | vdev = sdi->priv; | |
243 | ||
244 | switch (id) { | |
245 | case SR_CONF_SAMPLERATE: | |
246 | vdev->samplerate = g_variant_get_uint64(data); | |
247 | sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate); | |
248 | break; | |
249 | case SR_CONF_SESSIONFILE: | |
250 | g_free(vdev->sessionfile); | |
251 | vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL)); | |
252 | sr_info("Setting sessionfile to '%s'.", vdev->sessionfile); | |
253 | break; | |
254 | case SR_CONF_CAPTUREFILE: | |
255 | g_free(vdev->capturefile); | |
256 | vdev->capturefile = g_strdup(g_variant_get_string(data, NULL)); | |
257 | sr_info("Setting capturefile to '%s'.", vdev->capturefile); | |
258 | break; | |
259 | case SR_CONF_CAPTURE_UNITSIZE: | |
260 | vdev->unitsize = g_variant_get_uint64(data); | |
261 | break; | |
262 | case SR_CONF_NUM_LOGIC_PROBES: | |
263 | vdev->num_probes = g_variant_get_uint64(data); | |
264 | break; | |
265 | default: | |
266 | return SR_ERR_NA; | |
267 | } | |
268 | ||
269 | return SR_OK; | |
270 | } | |
271 | ||
272 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
273 | const struct sr_probe_group *probe_group) | |
274 | { | |
275 | (void)sdi; | |
276 | (void)probe_group; | |
277 | ||
278 | switch (key) { | |
279 | case SR_CONF_DEVICE_OPTIONS: | |
280 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
281 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
282 | break; | |
283 | default: | |
284 | return SR_ERR_NA; | |
285 | } | |
286 | ||
287 | return SR_OK; | |
288 | } | |
289 | ||
290 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
291 | { | |
292 | struct session_vdev *vdev; | |
293 | int ret; | |
294 | ||
295 | vdev = sdi->priv; | |
296 | ||
297 | vdev->bytes_read = 0; | |
298 | vdev->cur_chunk = 0; | |
299 | vdev->finished = FALSE; | |
300 | ||
301 | sr_info("Opening archive %s file %s", vdev->sessionfile, | |
302 | vdev->capturefile); | |
303 | ||
304 | if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) { | |
305 | sr_err("Failed to open session file '%s': " | |
306 | "zip error %d.", vdev->sessionfile, ret); | |
307 | return SR_ERR; | |
308 | } | |
309 | ||
310 | /* Send header packet to the session bus. */ | |
311 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
312 | ||
313 | /* freewheeling source */ | |
314 | sr_session_source_add(-1, 0, 0, receive_data, cb_data); | |
315 | ||
316 | return SR_OK; | |
317 | } | |
318 | ||
319 | /** @private */ | |
320 | SR_PRIV struct sr_dev_driver session_driver = { | |
321 | .name = "virtual-session", | |
322 | .longname = "Session-emulating driver", | |
323 | .api_version = 1, | |
324 | .init = init, | |
325 | .cleanup = dev_clear, | |
326 | .scan = NULL, | |
327 | .dev_list = NULL, | |
328 | .dev_clear = dev_clear, | |
329 | .config_get = config_get, | |
330 | .config_set = config_set, | |
331 | .config_list = config_list, | |
332 | .dev_open = dev_open, | |
333 | .dev_close = dev_close, | |
334 | .dev_acquisition_start = dev_acquisition_start, | |
335 | .dev_acquisition_stop = NULL, | |
336 | .priv = NULL, | |
337 | }; |