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7d658874 BV |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 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 <sigrok.h> | |
27 | ||
28 | /* size of payloads sent across the session bus */ | |
29 | #define CHUNKSIZE 4096 | |
30 | ||
31 | struct session_vdevice { | |
32 | char *capturefile; | |
33 | struct zip *archive; | |
34 | struct zip_file *capfile; | |
35 | uint64_t samplerate; | |
36 | int unitsize; | |
37 | int num_probes; | |
38 | }; | |
39 | ||
40 | static char *sessionfile = NULL; | |
41 | static GSList *device_instances = NULL; | |
42 | static int capabilities[] = { | |
43 | SR_HWCAP_CAPTUREFILE, | |
44 | SR_HWCAP_CAPTURE_UNITSIZE, | |
45 | 0, | |
46 | }; | |
47 | ||
48 | ||
49 | static struct session_vdevice *get_vdevice_by_index(int device_index) | |
50 | { | |
51 | struct sr_device_instance *sdi; | |
52 | struct session_vdevice *vdevice; | |
53 | ||
54 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) | |
55 | return NULL; | |
56 | ||
57 | vdevice = sdi->priv; | |
58 | ||
59 | return vdevice; | |
60 | } | |
61 | ||
62 | static int feed_chunk(int fd, int revents, void *user_data) | |
63 | { | |
64 | struct sr_device_instance *sdi; | |
65 | struct session_vdevice *vdevice; | |
66 | struct sr_datafeed_packet packet; | |
67 | GSList *l; | |
68 | void *buf; | |
69 | int ret, got_data; | |
70 | ||
71 | /* avoid compiler warning */ | |
72 | fd = fd; | |
73 | revents = revents; | |
74 | ||
75 | g_debug("session_driver: feed chunk"); | |
76 | ||
77 | got_data = FALSE; | |
78 | for (l = device_instances; l; l = l->next) { | |
79 | sdi = l->data; | |
80 | vdevice = sdi->priv; | |
81 | if (!vdevice) | |
82 | /* already done with this instance */ | |
83 | continue; | |
84 | ||
85 | buf = g_malloc(CHUNKSIZE); | |
86 | ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE); | |
87 | if (ret > 0) { | |
88 | got_data = TRUE; | |
89 | packet.type = SR_DF_LOGIC; | |
90 | packet.length = ret; | |
91 | packet.unitsize = vdevice->unitsize; | |
92 | packet.payload = buf; | |
8a2efef2 | 93 | sr_session_bus(user_data, &packet); |
7d658874 BV |
94 | } else { |
95 | /* done with this capture file */ | |
96 | zip_fclose(vdevice->capfile); | |
97 | g_free(vdevice->capturefile); | |
98 | g_free(vdevice); | |
99 | sdi->priv = NULL; | |
100 | } | |
101 | } | |
102 | ||
103 | if (!got_data) { | |
104 | packet.type = SR_DF_END; | |
105 | packet.length = 0; | |
8a2efef2 | 106 | sr_session_bus(user_data, &packet); |
7d658874 BV |
107 | } |
108 | ||
109 | return TRUE; | |
110 | } | |
111 | ||
112 | /* driver callbacks */ | |
113 | ||
54ac5277 | 114 | static int hw_init(const char *deviceinfo) |
7d658874 BV |
115 | { |
116 | ||
117 | sessionfile = g_strdup(deviceinfo); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static void hw_cleanup(void) | |
123 | { | |
124 | GSList *l; | |
125 | ||
126 | for (l = device_instances; l; l = l->next) | |
127 | sr_device_instance_free(l->data); | |
128 | ||
129 | g_free(sessionfile); | |
130 | ||
131 | } | |
132 | ||
133 | static int hw_opendev(int device_index) | |
134 | { | |
135 | struct sr_device_instance *sdi; | |
136 | ||
137 | sdi = sr_device_instance_new(device_index, SR_ST_INITIALIZING, | |
138 | NULL, NULL, NULL); | |
139 | if (!sdi) | |
140 | return SR_ERR; | |
141 | sdi->priv = g_malloc0(sizeof(struct session_vdevice)); | |
142 | if (!sdi->priv) | |
143 | return SR_ERR; | |
144 | device_instances = g_slist_append(device_instances, sdi); | |
145 | ||
146 | return SR_OK; | |
147 | } | |
148 | ||
7d658874 BV |
149 | static void *hw_get_device_info(int device_index, int device_info_id) |
150 | { | |
151 | struct session_vdevice *vdevice; | |
152 | void *info; | |
153 | ||
b8c2f85f BV |
154 | if (device_info_id != SR_DI_CUR_SAMPLERATE) |
155 | return NULL; | |
156 | ||
7d658874 BV |
157 | if (!(vdevice = get_vdevice_by_index(device_index))) |
158 | return NULL; | |
159 | ||
160 | info = &vdevice->samplerate; | |
161 | ||
162 | return info; | |
163 | } | |
164 | ||
165 | static int hw_get_status(int device_index) | |
166 | { | |
167 | ||
168 | /* avoid compiler warning */ | |
169 | device_index = device_index; | |
170 | ||
171 | if (devices) | |
172 | return SR_OK; | |
173 | else | |
174 | return SR_ERR; | |
175 | } | |
176 | ||
177 | static int *hw_get_capabilities(void) | |
178 | { | |
179 | ||
180 | return capabilities; | |
181 | } | |
182 | ||
183 | static int hw_set_configuration(int device_index, int capability, void *value) | |
184 | { | |
185 | struct session_vdevice *vdevice; | |
186 | uint64_t *tmp_u64; | |
187 | ||
188 | if (!(vdevice = get_vdevice_by_index(device_index))) | |
189 | return SR_ERR; | |
190 | ||
191 | switch (capability) { | |
192 | case SR_HWCAP_SAMPLERATE: | |
193 | tmp_u64 = value; | |
194 | vdevice->samplerate = *tmp_u64; | |
195 | break; | |
196 | case SR_HWCAP_CAPTUREFILE: | |
197 | vdevice->capturefile = g_strdup(value); | |
198 | break; | |
199 | case SR_HWCAP_CAPTURE_UNITSIZE: | |
200 | tmp_u64 = value; | |
201 | vdevice->unitsize = *tmp_u64; | |
202 | break; | |
203 | case SR_HWCAP_CAPTURE_NUM_PROBES: | |
204 | tmp_u64 = value; | |
205 | vdevice->num_probes = *tmp_u64; | |
206 | break; | |
207 | default: | |
208 | return SR_ERR; | |
209 | } | |
210 | ||
211 | return SR_OK; | |
212 | } | |
213 | ||
214 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
215 | { | |
216 | struct zip_stat zs; | |
217 | struct session_vdevice *vdevice; | |
218 | struct sr_datafeed_header *header; | |
219 | struct sr_datafeed_packet *packet; | |
220 | int err; | |
221 | ||
222 | /* avoid compiler warning */ | |
223 | session_device_id = session_device_id; | |
224 | ||
225 | if (!(vdevice = get_vdevice_by_index(device_index))) | |
226 | return SR_ERR; | |
227 | ||
228 | g_message("session_driver: opening archive %s file %s", | |
229 | sessionfile, vdevice->capturefile); | |
230 | ||
231 | if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) { | |
232 | g_warning("Failed to open session file '%s': zip error %d\n", | |
233 | sessionfile, err); | |
234 | return SR_ERR; | |
235 | } | |
236 | ||
237 | if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) { | |
238 | g_warning("Failed to check capture file '%s' in session file '%s'.", | |
239 | vdevice->capturefile, sessionfile); | |
240 | return SR_ERR; | |
241 | } | |
242 | ||
243 | if (!(vdevice->capfile = zip_fopen(vdevice->archive, vdevice->capturefile, 0))) { | |
244 | g_warning("Failed to open capture file '%s' in session file '%s'.", | |
245 | vdevice->capturefile, sessionfile); | |
246 | return SR_ERR; | |
247 | } | |
248 | ||
249 | /* freewheeling source */ | |
8a2efef2 | 250 | sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id); |
7d658874 BV |
251 | |
252 | /* Send header packet to the session bus. */ | |
253 | packet = g_malloc(sizeof(struct sr_datafeed_packet)); | |
254 | header = g_malloc(sizeof(struct sr_datafeed_header)); | |
255 | if (!packet || !header) | |
256 | return SR_ERR; | |
257 | packet->type = SR_DF_HEADER; | |
258 | packet->length = sizeof(struct sr_datafeed_header); | |
259 | packet->payload = (unsigned char *)header; | |
260 | header->feed_version = 1; | |
261 | gettimeofday(&header->starttime, NULL); | |
262 | header->samplerate = 0; | |
263 | header->protocol_id = SR_PROTO_RAW; | |
264 | header->num_logic_probes = vdevice->num_probes; | |
265 | header->num_analog_probes = 0; | |
8a2efef2 | 266 | sr_session_bus(session_device_id, packet); |
7d658874 BV |
267 | g_free(header); |
268 | g_free(packet); | |
269 | ||
270 | return SR_OK; | |
271 | } | |
272 | ||
7d658874 BV |
273 | |
274 | struct sr_device_plugin session_driver = { | |
275 | "session", | |
276 | "Session-emulating driver", | |
277 | 1, | |
278 | hw_init, | |
279 | hw_cleanup, | |
280 | hw_opendev, | |
b8c2f85f | 281 | NULL, |
7d658874 BV |
282 | hw_get_device_info, |
283 | hw_get_status, | |
284 | hw_get_capabilities, | |
285 | hw_set_configuration, | |
286 | hw_start_acquisition, | |
8a2efef2 | 287 | NULL, |
7d658874 | 288 | }; |