2 * This file is part of the sigrok project.
4 * Copyright (C) 2010-2012 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 (512 * 1024)
35 struct zip_file *capfile;
42 static char *sessionfile = NULL;
43 static GSList *dev_insts = NULL;
44 static int hwcaps[] = {
46 SR_HWCAP_CAPTURE_UNITSIZE,
53 * @param dev_index TODO.
55 static struct session_vdev *get_vdev_by_index(int dev_index)
57 struct sr_dev_inst *sdi;
58 struct session_vdev *vdev;
60 /* TODO: Sanity checks on dev_index. */
62 if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
63 sr_err("session driver: %s: device instance with device "
64 "index %d was not found", __func__, dev_index);
68 /* TODO: Is sdi->priv == NULL valid? */
79 * @param revents TODO.
80 * @param cb_data TODO.
84 static int receive_data(int fd, int revents, void *cb_data)
86 struct sr_dev_inst *sdi;
87 struct session_vdev *vdev;
88 struct sr_datafeed_packet packet;
89 struct sr_datafeed_logic logic;
94 /* Avoid compiler warnings. */
98 sr_dbg("session_driver: feed chunk");
101 for (l = dev_insts; l; l = l->next) {
105 /* already done with this instance */
108 if (!(buf = g_try_malloc(CHUNKSIZE))) {
109 sr_err("session driver: %s: buf malloc failed",
111 return FALSE; /* TODO: SR_ERR_MALLOC */
114 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
117 packet.type = SR_DF_LOGIC;
118 packet.payload = &logic;
120 logic.unitsize = vdev->unitsize;
122 vdev->bytes_read += ret;
123 sr_session_send(cb_data, &packet);
125 /* done with this capture file */
126 zip_fclose(vdev->capfile);
127 g_free(vdev->capturefile);
134 packet.type = SR_DF_END;
135 sr_session_send(cb_data, &packet);
141 /* driver callbacks */
142 static int hw_cleanup(void);
147 * @param devinfo TODO.
151 static int hw_init(const char *devinfo)
153 sessionfile = g_strdup(devinfo);
161 static int hw_cleanup(void)
165 for (l = dev_insts; l; l = l->next)
166 sr_dev_inst_free(l->data);
167 g_slist_free(dev_insts);
170 sr_session_source_remove(-1);
177 static int hw_dev_open(int dev_index)
179 struct sr_dev_inst *sdi;
181 sdi = sr_dev_inst_new(dev_index, SR_ST_INITIALIZING,
186 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
187 sr_err("session driver: %s: sdi->priv malloc failed", __func__);
188 return SR_ERR_MALLOC;
191 dev_insts = g_slist_append(dev_insts, sdi);
196 static void *hw_dev_info_get(int dev_index, int dev_info_id)
198 struct session_vdev *vdev;
201 if (dev_info_id != SR_DI_CUR_SAMPLERATE)
204 if (!(vdev = get_vdev_by_index(dev_index)))
207 info = &vdev->samplerate;
212 static int hw_dev_status_get(int dev_index)
214 /* Avoid compiler warnings. */
217 if (sr_dev_list() != NULL)
224 * Get the list of hardware capabilities.
226 * @return A pointer to the (hardware) capabilities of this virtual session
227 * driver. This could be NULL, if no such capabilities exist.
229 static int *hw_hwcap_get_all(void)
234 static int hw_dev_config_set(int dev_index, int hwcap, void *value)
236 struct session_vdev *vdev;
239 if (!(vdev = get_vdev_by_index(dev_index)))
243 case SR_HWCAP_SAMPLERATE:
245 vdev->samplerate = *tmp_u64;
246 sr_info("session driver: setting samplerate to %" PRIu64,
249 case SR_HWCAP_CAPTUREFILE:
250 vdev->capturefile = g_strdup(value);
251 sr_info("session driver: setting capturefile to %s",
254 case SR_HWCAP_CAPTURE_UNITSIZE:
256 vdev->unitsize = *tmp_u64;
258 case SR_HWCAP_CAPTURE_NUM_PROBES:
260 vdev->num_probes = *tmp_u64;
263 sr_err("session driver: %s: unknown capability %d requested",
271 static int hw_dev_acquisition_start(int dev_index, void *cb_data)
274 struct session_vdev *vdev;
275 struct sr_datafeed_header *header;
276 struct sr_datafeed_packet *packet;
279 if (!(vdev = get_vdev_by_index(dev_index)))
282 sr_info("session_driver: opening archive %s file %s", sessionfile,
285 if (!(vdev->archive = zip_open(sessionfile, 0, &ret))) {
286 sr_err("session driver: Failed to open session file '%s': "
287 "zip error %d\n", sessionfile, ret);
291 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
292 sr_err("session driver: Failed to check capture file '%s' in "
293 "session file '%s'.", vdev->capturefile, sessionfile);
297 if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
298 sr_err("session driver: Failed to open capture file '%s' in "
299 "session file '%s'.", vdev->capturefile, sessionfile);
303 /* freewheeling source */
304 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
306 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
307 sr_err("session driver: %s: packet malloc failed", __func__);
308 return SR_ERR_MALLOC;
311 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
312 sr_err("session driver: %s: header malloc failed", __func__);
313 return SR_ERR_MALLOC;
316 /* Send header packet to the session bus. */
317 packet->type = SR_DF_HEADER;
318 packet->payload = (unsigned char *)header;
319 header->feed_version = 1;
320 gettimeofday(&header->starttime, NULL);
321 header->samplerate = vdev->samplerate;
322 header->num_logic_probes = vdev->num_probes;
323 sr_session_send(cb_data, packet);
330 SR_PRIV struct sr_dev_driver session_driver = {
332 .longname = "Session-emulating driver",
335 .cleanup = hw_cleanup,
336 .dev_open = hw_dev_open,
338 .dev_info_get = hw_dev_info_get,
339 .dev_status_get = hw_dev_status_get,
340 .hwcap_get_all = hw_hwcap_get_all,
341 .dev_config_set = hw_dev_config_set,
342 .dev_acquisition_start = hw_dev_acquisition_start,
343 .dev_acquisition_stop = NULL,