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7d658874 | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
7d658874 | 3 | * |
13d8e03c | 4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> |
7d658874 BV |
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> | |
45c59c8b BV |
26 | #include "libsigrok.h" |
27 | #include "libsigrok-internal.h" | |
7d658874 | 28 | |
29a27196 UH |
29 | /* Message logging helpers with subsystem-specific prefix string. */ |
30 | #define LOG_PREFIX "virtual-session: " | |
31 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
32 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
33 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
34 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
35 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
36 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
a885ce3e | 37 | |
7d658874 | 38 | /* size of payloads sent across the session bus */ |
b4bd7088 | 39 | /** @cond PRIVATE */ |
8ff6afc9 | 40 | #define CHUNKSIZE (512 * 1024) |
b4bd7088 | 41 | /** @endcond */ |
7d658874 | 42 | |
bb7ef793 | 43 | struct session_vdev { |
40dda2c3 | 44 | char *sessionfile; |
7d658874 BV |
45 | char *capturefile; |
46 | struct zip *archive; | |
47 | struct zip_file *capfile; | |
cb1e389c | 48 | int bytes_read; |
7d658874 BV |
49 | uint64_t samplerate; |
50 | int unitsize; | |
51 | int num_probes; | |
f438e0c9 | 52 | int cur_chunk; |
7d658874 BV |
53 | }; |
54 | ||
d68e2d1a | 55 | static GSList *dev_insts = NULL; |
915f7cc8 | 56 | static const int hwcaps[] = { |
1953564a BV |
57 | SR_CONF_CAPTUREFILE, |
58 | SR_CONF_CAPTURE_UNITSIZE, | |
7d658874 BV |
59 | 0, |
60 | }; | |
61 | ||
9289e273 | 62 | static int receive_data(int fd, int revents, void *cb_data) |
7d658874 | 63 | { |
d68e2d1a | 64 | struct sr_dev_inst *sdi; |
bb7ef793 | 65 | struct session_vdev *vdev; |
7d658874 | 66 | struct sr_datafeed_packet packet; |
9c939c51 | 67 | struct sr_datafeed_logic logic; |
f438e0c9 | 68 | struct zip_stat zs; |
7d658874 | 69 | GSList *l; |
7d658874 | 70 | int ret, got_data; |
f438e0c9 BV |
71 | char capturefile[16]; |
72 | void *buf; | |
7d658874 | 73 | |
cb93f8a9 UH |
74 | (void)fd; |
75 | (void)revents; | |
7d658874 | 76 | |
7d658874 | 77 | got_data = FALSE; |
d68e2d1a | 78 | for (l = dev_insts; l; l = l->next) { |
7d658874 | 79 | sdi = l->data; |
f438e0c9 BV |
80 | if (!(vdev = sdi->priv)) |
81 | /* Already done with this instance. */ | |
7d658874 BV |
82 | continue; |
83 | ||
b53738ba | 84 | if (!(buf = g_try_malloc(CHUNKSIZE))) { |
a885ce3e | 85 | sr_err("%s: buf malloc failed", __func__); |
a2e46460 | 86 | return FALSE; |
b53738ba UH |
87 | } |
88 | ||
f438e0c9 BV |
89 | if (!vdev->capfile) { |
90 | /* No capture file opened yet, or finished with the last | |
91 | * chunked one. */ | |
92 | if (vdev->cur_chunk == 0) { | |
93 | /* capturefile is always the unchunked base name. */ | |
94 | if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) { | |
95 | /* No chunks, just a single capture file. */ | |
96 | vdev->cur_chunk = 0; | |
97 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
98 | vdev->capturefile, 0))) | |
99 | return FALSE; | |
100 | sr_dbg("Opened %s.", vdev->capturefile); | |
101 | } else { | |
102 | /* Try as first chunk filename. */ | |
103 | snprintf(capturefile, 15, "%s-1", vdev->capturefile); | |
104 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
105 | vdev->cur_chunk = 1; | |
106 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
107 | capturefile, 0))) | |
108 | return FALSE; | |
109 | sr_dbg("Opened %s.", capturefile); | |
110 | } else { | |
111 | sr_err("No capture file '%s' in " "session file '%s'.", | |
112 | vdev->capturefile, vdev->sessionfile); | |
113 | return FALSE; | |
114 | } | |
115 | } | |
116 | } else { | |
117 | /* Capture data is chunked, advance to the next chunk. */ | |
118 | vdev->cur_chunk++; | |
119 | snprintf(capturefile, 15, "%s-%d", vdev->capturefile, | |
120 | vdev->cur_chunk); | |
121 | if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) { | |
122 | if (!(vdev->capfile = zip_fopen(vdev->archive, | |
123 | capturefile, 0))) | |
124 | return FALSE; | |
125 | sr_dbg("Opened %s.", capturefile); | |
126 | } else { | |
127 | /* We got all the chunks, finish up. */ | |
128 | g_free(vdev->capturefile); | |
129 | g_free(vdev); | |
130 | sdi->priv = NULL; | |
131 | continue; | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
bb7ef793 | 136 | ret = zip_fread(vdev->capfile, buf, CHUNKSIZE); |
7d658874 BV |
137 | if (ret > 0) { |
138 | got_data = TRUE; | |
139 | packet.type = SR_DF_LOGIC; | |
9c939c51 BV |
140 | packet.payload = &logic; |
141 | logic.length = ret; | |
bb7ef793 | 142 | logic.unitsize = vdev->unitsize; |
9c939c51 | 143 | logic.data = buf; |
bb7ef793 | 144 | vdev->bytes_read += ret; |
9289e273 | 145 | sr_session_send(cb_data, &packet); |
7d658874 BV |
146 | } else { |
147 | /* done with this capture file */ | |
bb7ef793 | 148 | zip_fclose(vdev->capfile); |
f438e0c9 BV |
149 | vdev->capfile = NULL; |
150 | if (vdev->cur_chunk == 0) { | |
151 | /* It was the only file. */ | |
152 | g_free(vdev->capturefile); | |
153 | g_free(vdev); | |
154 | sdi->priv = NULL; | |
155 | } else { | |
156 | /* There might be more chunks, so don't fall through | |
157 | * to the SR_DF_END here. */ | |
158 | return TRUE; | |
159 | } | |
7d658874 BV |
160 | } |
161 | } | |
162 | ||
163 | if (!got_data) { | |
164 | packet.type = SR_DF_END; | |
9289e273 | 165 | sr_session_send(cb_data, &packet); |
b863fb1b | 166 | sr_session_source_remove(-1); |
7d658874 BV |
167 | } |
168 | ||
169 | return TRUE; | |
170 | } | |
171 | ||
172 | /* driver callbacks */ | |
173 | ||
6078d2c9 | 174 | static int init(struct sr_context *sr_ctx) |
7d658874 | 175 | { |
34f06b90 PS |
176 | (void)sr_ctx; |
177 | ||
61136ea6 | 178 | return SR_OK; |
7d658874 BV |
179 | } |
180 | ||
6078d2c9 | 181 | static int cleanup(void) |
7d658874 BV |
182 | { |
183 | GSList *l; | |
184 | ||
d68e2d1a | 185 | for (l = dev_insts; l; l = l->next) |
d3683c42 | 186 | sr_dev_inst_free(l->data); |
d68e2d1a UH |
187 | g_slist_free(dev_insts); |
188 | dev_insts = NULL; | |
805e9640 | 189 | |
57ab7d9f | 190 | return SR_OK; |
7d658874 BV |
191 | } |
192 | ||
6078d2c9 | 193 | static int dev_open(struct sr_dev_inst *sdi) |
7d658874 | 194 | { |
bb7ef793 | 195 | if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) { |
96ea73db | 196 | sr_err("Device context malloc failed."); |
b53738ba UH |
197 | return SR_ERR_MALLOC; |
198 | } | |
199 | ||
d68e2d1a | 200 | dev_insts = g_slist_append(dev_insts, sdi); |
7d658874 BV |
201 | |
202 | return SR_OK; | |
203 | } | |
204 | ||
003595ac | 205 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi) |
7d658874 | 206 | { |
bb7ef793 | 207 | struct session_vdev *vdev; |
7d658874 | 208 | |
035a1078 | 209 | switch (id) { |
123e1313 | 210 | case SR_CONF_SAMPLERATE: |
387014de BV |
211 | if (sdi) { |
212 | vdev = sdi->priv; | |
003595ac | 213 | *data = g_variant_new_uint64(vdev->samplerate); |
387014de BV |
214 | } else |
215 | return SR_ERR; | |
216 | break; | |
217 | default: | |
96ea73db | 218 | return SR_ERR_NA; |
387014de | 219 | } |
7d658874 | 220 | |
387014de | 221 | return SR_OK; |
7d658874 BV |
222 | } |
223 | ||
003595ac | 224 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi) |
7d658874 | 225 | { |
bb7ef793 | 226 | struct session_vdev *vdev; |
7d658874 | 227 | |
6f4b1868 | 228 | vdev = sdi->priv; |
7d658874 | 229 | |
035a1078 | 230 | switch (id) { |
1953564a | 231 | case SR_CONF_SAMPLERATE: |
003595ac | 232 | vdev->samplerate = g_variant_get_uint64(data); |
a885ce3e | 233 | sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate); |
7d658874 | 234 | break; |
1953564a | 235 | case SR_CONF_SESSIONFILE: |
003595ac | 236 | vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL)); |
a885ce3e | 237 | sr_info("Setting sessionfile to '%s'.", vdev->sessionfile); |
40dda2c3 | 238 | break; |
1953564a | 239 | case SR_CONF_CAPTUREFILE: |
003595ac | 240 | vdev->capturefile = g_strdup(g_variant_get_string(data, NULL)); |
a885ce3e | 241 | sr_info("Setting capturefile to '%s'.", vdev->capturefile); |
7d658874 | 242 | break; |
1953564a | 243 | case SR_CONF_CAPTURE_UNITSIZE: |
003595ac | 244 | vdev->unitsize = g_variant_get_uint64(data); |
7d658874 | 245 | break; |
1953564a | 246 | case SR_CONF_CAPTURE_NUM_PROBES: |
003595ac | 247 | vdev->num_probes = g_variant_get_uint64(data); |
7d658874 BV |
248 | break; |
249 | default: | |
96ea73db | 250 | return SR_ERR_NA; |
7d658874 BV |
251 | } |
252 | ||
253 | return SR_OK; | |
254 | } | |
255 | ||
003595ac | 256 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) |
9a6517d1 BV |
257 | { |
258 | ||
259 | (void)sdi; | |
260 | ||
261 | switch (key) { | |
262 | case SR_CONF_DEVICE_OPTIONS: | |
003595ac BV |
263 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, |
264 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
9a6517d1 BV |
265 | break; |
266 | default: | |
96ea73db | 267 | return SR_ERR_NA; |
9a6517d1 BV |
268 | } |
269 | ||
270 | return SR_OK; | |
271 | } | |
272 | ||
6078d2c9 | 273 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) |
7d658874 | 274 | { |
bb7ef793 | 275 | struct session_vdev *vdev; |
ebc34738 | 276 | int ret; |
7d658874 | 277 | |
4d684427 | 278 | vdev = sdi->priv; |
7d658874 | 279 | |
a885ce3e | 280 | sr_info("Opening archive %s file %s", vdev->sessionfile, |
bb7ef793 | 281 | vdev->capturefile); |
7d658874 | 282 | |
40dda2c3 | 283 | if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) { |
a885ce3e | 284 | sr_err("Failed to open session file '%s': " |
40dda2c3 | 285 | "zip error %d\n", vdev->sessionfile, ret); |
7d658874 BV |
286 | return SR_ERR; |
287 | } | |
288 | ||
4afdfd46 | 289 | /* Send header packet to the session bus. */ |
29a27196 | 290 | std_session_send_df_header(cb_data, LOG_PREFIX); |
4afdfd46 | 291 | |
7d658874 | 292 | /* freewheeling source */ |
9289e273 | 293 | sr_session_source_add(-1, 0, 0, receive_data, cb_data); |
7d658874 | 294 | |
7d658874 BV |
295 | return SR_OK; |
296 | } | |
297 | ||
b4bd7088 | 298 | /** @private */ |
c09f0b57 | 299 | SR_PRIV struct sr_dev_driver session_driver = { |
a885ce3e | 300 | .name = "virtual-session", |
5097b0d0 UH |
301 | .longname = "Session-emulating driver", |
302 | .api_version = 1, | |
6078d2c9 UH |
303 | .init = init, |
304 | .cleanup = cleanup, | |
96ea73db UH |
305 | .scan = NULL, |
306 | .dev_list = NULL, | |
307 | .dev_clear = NULL, | |
035a1078 BV |
308 | .config_get = config_get, |
309 | .config_set = config_set, | |
9a6517d1 | 310 | .config_list = config_list, |
6078d2c9 | 311 | .dev_open = dev_open, |
e7eb703f | 312 | .dev_close = NULL, |
6078d2c9 | 313 | .dev_acquisition_start = dev_acquisition_start, |
69040b7c | 314 | .dev_acquisition_stop = NULL, |
96ea73db | 315 | .priv = NULL, |
7d658874 | 316 | }; |