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7d658874 BV |
1 | /* |
2 | * This file is part of the sigrok project. | |
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 | |
a885ce3e UH |
29 | /* Message logging helpers with driver-specific prefix string. */ |
30 | #define DRIVER_LOG_DOMAIN "virtual-session: " | |
31 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
32 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
33 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
34 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
35 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
36 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
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; | |
52 | }; | |
53 | ||
d68e2d1a | 54 | static GSList *dev_insts = NULL; |
915f7cc8 | 55 | static const int hwcaps[] = { |
1953564a BV |
56 | SR_CONF_CAPTUREFILE, |
57 | SR_CONF_CAPTURE_UNITSIZE, | |
7d658874 BV |
58 | 0, |
59 | }; | |
60 | ||
9289e273 | 61 | static int receive_data(int fd, int revents, void *cb_data) |
7d658874 | 62 | { |
d68e2d1a | 63 | struct sr_dev_inst *sdi; |
bb7ef793 | 64 | struct session_vdev *vdev; |
7d658874 | 65 | struct sr_datafeed_packet packet; |
9c939c51 | 66 | struct sr_datafeed_logic logic; |
7d658874 BV |
67 | GSList *l; |
68 | void *buf; | |
69 | int ret, got_data; | |
70 | ||
cb93f8a9 UH |
71 | (void)fd; |
72 | (void)revents; | |
7d658874 | 73 | |
a885ce3e | 74 | sr_dbg("Feed chunk."); |
7d658874 BV |
75 | |
76 | got_data = FALSE; | |
d68e2d1a | 77 | for (l = dev_insts; l; l = l->next) { |
7d658874 | 78 | sdi = l->data; |
bb7ef793 UH |
79 | vdev = sdi->priv; |
80 | if (!vdev) | |
7d658874 BV |
81 | /* already done with this instance */ |
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 | ||
bb7ef793 | 89 | ret = zip_fread(vdev->capfile, buf, CHUNKSIZE); |
7d658874 BV |
90 | if (ret > 0) { |
91 | got_data = TRUE; | |
92 | packet.type = SR_DF_LOGIC; | |
9c939c51 BV |
93 | packet.payload = &logic; |
94 | logic.length = ret; | |
bb7ef793 | 95 | logic.unitsize = vdev->unitsize; |
9c939c51 | 96 | logic.data = buf; |
bb7ef793 | 97 | vdev->bytes_read += ret; |
9289e273 | 98 | sr_session_send(cb_data, &packet); |
7d658874 BV |
99 | } else { |
100 | /* done with this capture file */ | |
bb7ef793 UH |
101 | zip_fclose(vdev->capfile); |
102 | g_free(vdev->capturefile); | |
103 | g_free(vdev); | |
7d658874 BV |
104 | sdi->priv = NULL; |
105 | } | |
106 | } | |
107 | ||
108 | if (!got_data) { | |
109 | packet.type = SR_DF_END; | |
9289e273 | 110 | sr_session_send(cb_data, &packet); |
b863fb1b | 111 | sr_session_source_remove(-1); |
7d658874 BV |
112 | } |
113 | ||
114 | return TRUE; | |
115 | } | |
116 | ||
117 | /* driver callbacks */ | |
57ab7d9f | 118 | static int hw_cleanup(void); |
7d658874 | 119 | |
34f06b90 | 120 | static int hw_init(struct sr_context *sr_ctx) |
7d658874 | 121 | { |
34f06b90 PS |
122 | (void)sr_ctx; |
123 | ||
61136ea6 | 124 | return SR_OK; |
7d658874 BV |
125 | } |
126 | ||
57ab7d9f | 127 | static int hw_cleanup(void) |
7d658874 BV |
128 | { |
129 | GSList *l; | |
130 | ||
d68e2d1a | 131 | for (l = dev_insts; l; l = l->next) |
d3683c42 | 132 | sr_dev_inst_free(l->data); |
d68e2d1a UH |
133 | g_slist_free(dev_insts); |
134 | dev_insts = NULL; | |
805e9640 | 135 | |
57ab7d9f | 136 | return SR_OK; |
7d658874 BV |
137 | } |
138 | ||
25a0f108 | 139 | static int hw_dev_open(struct sr_dev_inst *sdi) |
7d658874 | 140 | { |
bb7ef793 | 141 | if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) { |
a885ce3e | 142 | sr_err("%s: sdi->priv malloc failed", __func__); |
b53738ba UH |
143 | return SR_ERR_MALLOC; |
144 | } | |
145 | ||
d68e2d1a | 146 | dev_insts = g_slist_append(dev_insts, sdi); |
7d658874 BV |
147 | |
148 | return SR_OK; | |
149 | } | |
150 | ||
003595ac | 151 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi) |
7d658874 | 152 | { |
bb7ef793 | 153 | struct session_vdev *vdev; |
7d658874 | 154 | |
035a1078 | 155 | switch (id) { |
123e1313 | 156 | case SR_CONF_SAMPLERATE: |
387014de BV |
157 | if (sdi) { |
158 | vdev = sdi->priv; | |
003595ac | 159 | *data = g_variant_new_uint64(vdev->samplerate); |
387014de BV |
160 | } else |
161 | return SR_ERR; | |
162 | break; | |
163 | default: | |
164 | return SR_ERR_ARG; | |
165 | } | |
7d658874 | 166 | |
387014de | 167 | return SR_OK; |
7d658874 BV |
168 | } |
169 | ||
003595ac | 170 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi) |
7d658874 | 171 | { |
bb7ef793 | 172 | struct session_vdev *vdev; |
7d658874 | 173 | |
6f4b1868 | 174 | vdev = sdi->priv; |
7d658874 | 175 | |
035a1078 | 176 | switch (id) { |
1953564a | 177 | case SR_CONF_SAMPLERATE: |
003595ac | 178 | vdev->samplerate = g_variant_get_uint64(data); |
a885ce3e | 179 | sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate); |
7d658874 | 180 | break; |
1953564a | 181 | case SR_CONF_SESSIONFILE: |
003595ac | 182 | vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL)); |
a885ce3e | 183 | sr_info("Setting sessionfile to '%s'.", vdev->sessionfile); |
40dda2c3 | 184 | break; |
1953564a | 185 | case SR_CONF_CAPTUREFILE: |
003595ac | 186 | vdev->capturefile = g_strdup(g_variant_get_string(data, NULL)); |
a885ce3e | 187 | sr_info("Setting capturefile to '%s'.", vdev->capturefile); |
7d658874 | 188 | break; |
1953564a | 189 | case SR_CONF_CAPTURE_UNITSIZE: |
003595ac | 190 | vdev->unitsize = g_variant_get_uint64(data); |
7d658874 | 191 | break; |
1953564a | 192 | case SR_CONF_CAPTURE_NUM_PROBES: |
003595ac | 193 | vdev->num_probes = g_variant_get_uint64(data); |
7d658874 BV |
194 | break; |
195 | default: | |
035a1078 | 196 | sr_err("Unknown capability: %d.", id); |
7d658874 BV |
197 | return SR_ERR; |
198 | } | |
199 | ||
200 | return SR_OK; | |
201 | } | |
202 | ||
003595ac | 203 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) |
9a6517d1 BV |
204 | { |
205 | ||
206 | (void)sdi; | |
207 | ||
208 | switch (key) { | |
209 | case SR_CONF_DEVICE_OPTIONS: | |
003595ac BV |
210 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, |
211 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
9a6517d1 BV |
212 | break; |
213 | default: | |
214 | return SR_ERR_ARG; | |
215 | } | |
216 | ||
217 | return SR_OK; | |
218 | } | |
219 | ||
4d684427 BV |
220 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, |
221 | void *cb_data) | |
7d658874 BV |
222 | { |
223 | struct zip_stat zs; | |
bb7ef793 | 224 | struct session_vdev *vdev; |
ebc34738 | 225 | int ret; |
7d658874 | 226 | |
4d684427 | 227 | vdev = sdi->priv; |
7d658874 | 228 | |
a885ce3e | 229 | sr_info("Opening archive %s file %s", vdev->sessionfile, |
bb7ef793 | 230 | vdev->capturefile); |
7d658874 | 231 | |
40dda2c3 | 232 | if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) { |
a885ce3e | 233 | sr_err("Failed to open session file '%s': " |
40dda2c3 | 234 | "zip error %d\n", vdev->sessionfile, ret); |
7d658874 BV |
235 | return SR_ERR; |
236 | } | |
237 | ||
bb7ef793 | 238 | if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) { |
a885ce3e | 239 | sr_err("Failed to check capture file '%s' in " |
40dda2c3 | 240 | "session file '%s'.", vdev->capturefile, vdev->sessionfile); |
7d658874 BV |
241 | return SR_ERR; |
242 | } | |
243 | ||
bb7ef793 | 244 | if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) { |
a885ce3e | 245 | sr_err("Failed to open capture file '%s' in " |
40dda2c3 | 246 | "session file '%s'.", vdev->capturefile, vdev->sessionfile); |
7d658874 BV |
247 | return SR_ERR; |
248 | } | |
249 | ||
4afdfd46 UH |
250 | /* Send header packet to the session bus. */ |
251 | std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN); | |
252 | ||
7d658874 | 253 | /* freewheeling source */ |
9289e273 | 254 | sr_session_source_add(-1, 0, 0, receive_data, cb_data); |
7d658874 | 255 | |
7d658874 BV |
256 | return SR_OK; |
257 | } | |
258 | ||
b4bd7088 | 259 | /** @private */ |
c09f0b57 | 260 | SR_PRIV struct sr_dev_driver session_driver = { |
a885ce3e | 261 | .name = "virtual-session", |
5097b0d0 UH |
262 | .longname = "Session-emulating driver", |
263 | .api_version = 1, | |
264 | .init = hw_init, | |
265 | .cleanup = hw_cleanup, | |
035a1078 BV |
266 | .config_get = config_get, |
267 | .config_set = config_set, | |
9a6517d1 | 268 | .config_list = config_list, |
e7eb703f UH |
269 | .dev_open = hw_dev_open, |
270 | .dev_close = NULL, | |
69040b7c UH |
271 | .dev_acquisition_start = hw_dev_acquisition_start, |
272 | .dev_acquisition_stop = NULL, | |
7d658874 | 273 | }; |