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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 | }; | |
47 | ||
48 | static GSList *dev_insts = NULL; | |
49 | static const int hwcaps[] = { | |
50 | SR_CONF_CAPTUREFILE, | |
51 | SR_CONF_CAPTURE_UNITSIZE, | |
52 | 0, | |
53 | }; | |
54 | ||
55 | static int receive_data(int fd, int revents, void *cb_data) | |
56 | { | |
57 | struct sr_dev_inst *sdi; | |
58 | struct session_vdev *vdev; | |
59 | struct sr_datafeed_packet packet; | |
60 | struct sr_datafeed_logic logic; | |
61 | struct zip_stat zs; | |
62 | GSList *l; | |
63 | int ret, got_data; | |
64 | char capturefile[16]; | |
65 | void *buf; | |
66 | ||
67 | (void)fd; | |
68 | (void)revents; | |
69 | ||
70 | got_data = FALSE; | |
71 | for (l = dev_insts; l; l = l->next) { | |
72 | sdi = l->data; | |
73 | if (!(vdev = sdi->priv)) | |
74 | /* Already done with this instance. */ | |
75 | continue; | |
76 | ||
77 | if (!vdev->capfile) { | |
78 | /* No capture file opened yet, or finished with the last | |
79 | * chunked one. */ | |
80 | if (vdev->cur_chunk == 0) { | |
81 | /* capturefile is always the unchunked base name. */ | |
82 | if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) { | |
83 | /* No chunks, just a single capture file. */ | |
84 | vdev->cur_chunk = 0; | |
85 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
86 | vdev->capturefile, 0))) | |
87 | return FALSE; | |
88 | sr_dbg("Opened %s.", vdev->capturefile); | |
89 | } else { | |
90 | /* Try as first chunk filename. */ | |
91 | snprintf(capturefile, 15, "%s-1", vdev->capturefile); | |
92 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
93 | vdev->cur_chunk = 1; | |
94 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
95 | capturefile, 0))) | |
96 | return FALSE; | |
97 | sr_dbg("Opened %s.", capturefile); | |
98 | } else { | |
99 | sr_err("No capture file '%s' in " "session file '%s'.", | |
100 | vdev->capturefile, vdev->sessionfile); | |
101 | return FALSE; | |
102 | } | |
103 | } | |
104 | } else { | |
105 | /* Capture data is chunked, advance to the next chunk. */ | |
106 | vdev->cur_chunk++; | |
107 | snprintf(capturefile, 15, "%s-%d", vdev->capturefile, | |
108 | vdev->cur_chunk); | |
109 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
110 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
111 | capturefile, 0))) | |
112 | return FALSE; | |
113 | sr_dbg("Opened %s.", capturefile); | |
114 | } else { | |
115 | /* We got all the chunks, finish up. */ | |
116 | g_free(vdev->capturefile); | |
117 | g_free(vdev); | |
118 | sdi->priv = NULL; | |
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, CHUNKSIZE); | |
130 | if (ret > 0) { | |
131 | got_data = TRUE; | |
132 | packet.type = SR_DF_LOGIC; | |
133 | packet.payload = &logic; | |
134 | logic.length = ret; | |
135 | logic.unitsize = vdev->unitsize; | |
136 | logic.data = buf; | |
137 | vdev->bytes_read += ret; | |
138 | sr_session_send(cb_data, &packet); | |
139 | } else { | |
140 | /* done with this capture file */ | |
141 | zip_fclose(vdev->capfile); | |
142 | vdev->capfile = NULL; | |
143 | if (vdev->cur_chunk == 0) { | |
144 | /* It was the only file. */ | |
145 | g_free(vdev->capturefile); | |
146 | g_free(vdev); | |
147 | sdi->priv = NULL; | |
148 | } else { | |
149 | /* There might be more chunks, so don't fall through | |
150 | * to the SR_DF_END here. */ | |
151 | g_free(buf); | |
152 | return TRUE; | |
153 | } | |
154 | } | |
155 | g_free(buf); | |
156 | } | |
157 | ||
158 | if (!got_data) { | |
159 | packet.type = SR_DF_END; | |
160 | sr_session_send(cb_data, &packet); | |
161 | sr_session_source_remove(-1); | |
162 | } | |
163 | ||
164 | return TRUE; | |
165 | } | |
166 | ||
167 | /* driver callbacks */ | |
168 | ||
169 | static int init(struct sr_context *sr_ctx) | |
170 | { | |
171 | (void)sr_ctx; | |
172 | ||
173 | return SR_OK; | |
174 | } | |
175 | ||
176 | static int cleanup(void) | |
177 | { | |
178 | GSList *l; | |
179 | ||
180 | for (l = dev_insts; l; l = l->next) | |
181 | sr_dev_inst_free(l->data); | |
182 | g_slist_free(dev_insts); | |
183 | dev_insts = NULL; | |
184 | ||
185 | return SR_OK; | |
186 | } | |
187 | ||
188 | static int dev_open(struct sr_dev_inst *sdi) | |
189 | { | |
190 | if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) { | |
191 | sr_err("Device context malloc failed."); | |
192 | return SR_ERR_MALLOC; | |
193 | } | |
194 | ||
195 | dev_insts = g_slist_append(dev_insts, sdi); | |
196 | ||
197 | return SR_OK; | |
198 | } | |
199 | ||
200 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, | |
201 | const struct sr_probe_group *probe_group) | |
202 | { | |
203 | struct session_vdev *vdev; | |
204 | ||
205 | (void)probe_group; | |
206 | ||
207 | switch (id) { | |
208 | case SR_CONF_SAMPLERATE: | |
209 | if (sdi) { | |
210 | vdev = sdi->priv; | |
211 | *data = g_variant_new_uint64(vdev->samplerate); | |
212 | } else | |
213 | return SR_ERR; | |
214 | break; | |
215 | default: | |
216 | return SR_ERR_NA; | |
217 | } | |
218 | ||
219 | return SR_OK; | |
220 | } | |
221 | ||
222 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, | |
223 | const struct sr_probe_group *probe_group) | |
224 | { | |
225 | struct session_vdev *vdev; | |
226 | ||
227 | (void)probe_group; | |
228 | ||
229 | vdev = sdi->priv; | |
230 | ||
231 | switch (id) { | |
232 | case SR_CONF_SAMPLERATE: | |
233 | vdev->samplerate = g_variant_get_uint64(data); | |
234 | sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate); | |
235 | break; | |
236 | case SR_CONF_SESSIONFILE: | |
237 | vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL)); | |
238 | sr_info("Setting sessionfile to '%s'.", vdev->sessionfile); | |
239 | break; | |
240 | case SR_CONF_CAPTUREFILE: | |
241 | vdev->capturefile = g_strdup(g_variant_get_string(data, NULL)); | |
242 | sr_info("Setting capturefile to '%s'.", vdev->capturefile); | |
243 | break; | |
244 | case SR_CONF_CAPTURE_UNITSIZE: | |
245 | vdev->unitsize = g_variant_get_uint64(data); | |
246 | break; | |
247 | case SR_CONF_NUM_LOGIC_PROBES: | |
248 | vdev->num_probes = g_variant_get_uint64(data); | |
249 | break; | |
250 | default: | |
251 | return SR_ERR_NA; | |
252 | } | |
253 | ||
254 | return SR_OK; | |
255 | } | |
256 | ||
257 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
258 | const struct sr_probe_group *probe_group) | |
259 | { | |
260 | (void)sdi; | |
261 | (void)probe_group; | |
262 | ||
263 | switch (key) { | |
264 | case SR_CONF_DEVICE_OPTIONS: | |
265 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
266 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
267 | break; | |
268 | default: | |
269 | return SR_ERR_NA; | |
270 | } | |
271 | ||
272 | return SR_OK; | |
273 | } | |
274 | ||
275 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
276 | { | |
277 | struct session_vdev *vdev; | |
278 | int ret; | |
279 | ||
280 | vdev = sdi->priv; | |
281 | ||
282 | sr_info("Opening archive %s file %s", vdev->sessionfile, | |
283 | vdev->capturefile); | |
284 | ||
285 | if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) { | |
286 | sr_err("Failed to open session file '%s': " | |
287 | "zip error %d.", vdev->sessionfile, ret); | |
288 | return SR_ERR; | |
289 | } | |
290 | ||
291 | /* Send header packet to the session bus. */ | |
292 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
293 | ||
294 | /* freewheeling source */ | |
295 | sr_session_source_add(-1, 0, 0, receive_data, cb_data); | |
296 | ||
297 | return SR_OK; | |
298 | } | |
299 | ||
300 | /** @private */ | |
301 | SR_PRIV struct sr_dev_driver session_driver = { | |
302 | .name = "virtual-session", | |
303 | .longname = "Session-emulating driver", | |
304 | .api_version = 1, | |
305 | .init = init, | |
306 | .cleanup = cleanup, | |
307 | .scan = NULL, | |
308 | .dev_list = NULL, | |
309 | .dev_clear = NULL, | |
310 | .config_get = config_get, | |
311 | .config_set = config_set, | |
312 | .config_list = config_list, | |
313 | .dev_open = dev_open, | |
314 | .dev_close = NULL, | |
315 | .dev_acquisition_start = dev_acquisition_start, | |
316 | .dev_acquisition_stop = NULL, | |
317 | .priv = NULL, | |
318 | }; |