2 * This file is part of the sigrok project.
4 * Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
20 #include <sys/types.h>
27 #include <sigrok-internal.h>
29 /* size of payloads sent across the session bus */
30 #define CHUNKSIZE 4096
32 struct session_vdevice {
35 struct zip_file *capfile;
41 static char *sessionfile = NULL;
42 static GSList *device_instances = NULL;
43 static int capabilities[] = {
45 SR_HWCAP_CAPTURE_UNITSIZE,
50 static struct session_vdevice *get_vdevice_by_index(int device_index)
52 struct sr_device_instance *sdi;
53 struct session_vdevice *vdevice;
55 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
63 static int feed_chunk(int fd, int revents, void *session_data)
65 struct sr_device_instance *sdi;
66 struct session_vdevice *vdevice;
67 struct sr_datafeed_packet packet;
68 struct sr_datafeed_logic logic;
73 /* Avoid compiler warnings. */
77 sr_dbg("session_driver: feed chunk");
80 for (l = device_instances; l; l = l->next) {
84 /* already done with this instance */
87 if (!(buf = g_try_malloc(CHUNKSIZE))) {
88 sr_err("session: %s: buf malloc failed", __func__);
89 // return SR_ERR_MALLOC;
93 ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE);
96 packet.type = SR_DF_LOGIC;
97 packet.timeoffset = 0;
99 packet.payload = &logic;
101 logic.unitsize = vdevice->unitsize;
103 sr_session_bus(session_data, &packet);
105 /* done with this capture file */
106 zip_fclose(vdevice->capfile);
107 g_free(vdevice->capturefile);
114 packet.type = SR_DF_END;
115 sr_session_bus(session_data, &packet);
121 /* driver callbacks */
122 static void hw_cleanup(void);
124 static int hw_init(const char *deviceinfo)
128 sessionfile = g_strdup(deviceinfo);
133 static void hw_cleanup(void)
137 for (l = device_instances; l; l = l->next)
138 sr_device_instance_free(l->data);
140 g_slist_free(device_instances);
141 device_instances = NULL;
143 sr_session_source_remove(-1);
149 static int hw_opendev(int device_index)
151 struct sr_device_instance *sdi;
153 sdi = sr_device_instance_new(device_index, SR_ST_INITIALIZING,
158 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdevice)))) {
159 sr_err("session: %s: sdi->priv malloc failed", __func__);
160 return SR_ERR_MALLOC;
163 device_instances = g_slist_append(device_instances, sdi);
168 static void *hw_get_device_info(int device_index, int device_info_id)
170 struct session_vdevice *vdevice;
173 if (device_info_id != SR_DI_CUR_SAMPLERATE)
176 if (!(vdevice = get_vdevice_by_index(device_index)))
179 info = &vdevice->samplerate;
184 static int hw_get_status(int device_index)
186 /* Avoid compiler warnings. */
195 static int *hw_get_capabilities(void)
201 static int hw_set_configuration(int device_index, int capability, void *value)
203 struct session_vdevice *vdevice;
206 if (!(vdevice = get_vdevice_by_index(device_index)))
209 switch (capability) {
210 case SR_HWCAP_SAMPLERATE:
212 vdevice->samplerate = *tmp_u64;
214 case SR_HWCAP_CAPTUREFILE:
215 vdevice->capturefile = g_strdup(value);
217 case SR_HWCAP_CAPTURE_UNITSIZE:
219 vdevice->unitsize = *tmp_u64;
221 case SR_HWCAP_CAPTURE_NUM_PROBES:
223 vdevice->num_probes = *tmp_u64;
232 static int hw_start_acquisition(int device_index, gpointer session_device_id)
235 struct session_vdevice *vdevice;
236 struct sr_datafeed_header *header;
237 struct sr_datafeed_packet *packet;
240 /* Avoid compiler warnings. */
241 (void)session_device_id;
243 if (!(vdevice = get_vdevice_by_index(device_index)))
246 sr_info("session_driver: opening archive %s file %s", sessionfile,
247 vdevice->capturefile);
249 if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) {
250 sr_warn("Failed to open session file '%s': zip error %d\n",
255 if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) {
256 sr_warn("Failed to check capture file '%s' in session file '%s'.",
257 vdevice->capturefile, sessionfile);
261 if (!(vdevice->capfile = zip_fopen(vdevice->archive, vdevice->capturefile, 0))) {
262 sr_warn("Failed to open capture file '%s' in session file '%s'.",
263 vdevice->capturefile, sessionfile);
267 /* freewheeling source */
268 sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id);
270 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
271 sr_err("session: %s: packet malloc failed", __func__);
272 return SR_ERR_MALLOC;
275 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
276 sr_err("session: %s: header malloc failed", __func__);
277 return SR_ERR_MALLOC;
280 /* Send header packet to the session bus. */
281 packet->type = SR_DF_HEADER;
282 packet->payload = (unsigned char *)header;
283 header->feed_version = 1;
284 gettimeofday(&header->starttime, NULL);
285 header->samplerate = vdevice->samplerate;
286 header->num_logic_probes = vdevice->num_probes;
287 header->num_analog_probes = 0;
288 sr_session_bus(session_device_id, packet);
295 struct sr_device_plugin session_driver = {
297 "Session-emulating driver",
306 hw_set_configuration,
307 hw_start_acquisition,