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>
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
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)
38 /* size of payloads sent across the session bus */
40 #define CHUNKSIZE (512 * 1024)
47 struct zip_file *capfile;
54 static GSList *dev_insts = NULL;
55 static const int hwcaps[] = {
57 SR_HWCAP_CAPTURE_UNITSIZE,
61 static int receive_data(int fd, int revents, void *cb_data)
63 struct sr_dev_inst *sdi;
64 struct session_vdev *vdev;
65 struct sr_datafeed_packet packet;
66 struct sr_datafeed_logic logic;
74 sr_dbg("Feed chunk.");
77 for (l = dev_insts; l; l = l->next) {
81 /* already done with this instance */
84 if (!(buf = g_try_malloc(CHUNKSIZE))) {
85 sr_err("%s: buf malloc failed", __func__);
89 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
92 packet.type = SR_DF_LOGIC;
93 packet.payload = &logic;
95 logic.unitsize = vdev->unitsize;
97 vdev->bytes_read += ret;
98 sr_session_send(cb_data, &packet);
100 /* done with this capture file */
101 zip_fclose(vdev->capfile);
102 g_free(vdev->capturefile);
109 packet.type = SR_DF_END;
110 sr_session_send(cb_data, &packet);
111 sr_session_source_remove(-1);
117 /* driver callbacks */
118 static int hw_cleanup(void);
120 static int hw_init(struct sr_context *sr_ctx)
127 static int hw_cleanup(void)
131 for (l = dev_insts; l; l = l->next)
132 sr_dev_inst_free(l->data);
133 g_slist_free(dev_insts);
139 static int hw_dev_open(struct sr_dev_inst *sdi)
141 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
142 sr_err("%s: sdi->priv malloc failed", __func__);
143 return SR_ERR_MALLOC;
146 dev_insts = g_slist_append(dev_insts, sdi);
151 static int hw_info_get(int info_id, const void **data,
152 const struct sr_dev_inst *sdi)
154 struct session_vdev *vdev;
160 case SR_DI_CUR_SAMPLERATE:
163 *data = &vdev->samplerate;
174 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
177 struct session_vdev *vdev;
178 const uint64_t *tmp_u64;
183 case SR_HWCAP_SAMPLERATE:
185 vdev->samplerate = *tmp_u64;
186 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
188 case SR_HWCAP_SESSIONFILE:
189 vdev->sessionfile = g_strdup(value);
190 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
192 case SR_HWCAP_CAPTUREFILE:
193 vdev->capturefile = g_strdup(value);
194 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
196 case SR_HWCAP_CAPTURE_UNITSIZE:
198 vdev->unitsize = *tmp_u64;
200 case SR_HWCAP_CAPTURE_NUM_PROBES:
202 vdev->num_probes = *tmp_u64;
205 sr_err("Unknown capability: %d.", hwcap);
212 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
216 struct session_vdev *vdev;
217 struct sr_datafeed_header *header;
218 struct sr_datafeed_packet *packet;
219 struct sr_datafeed_meta_logic meta;
224 sr_info("Opening archive %s file %s", vdev->sessionfile,
227 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
228 sr_err("Failed to open session file '%s': "
229 "zip error %d\n", vdev->sessionfile, ret);
233 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
234 sr_err("Failed to check capture file '%s' in "
235 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
239 if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
240 sr_err("Failed to open capture file '%s' in "
241 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
245 /* freewheeling source */
246 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
248 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
249 sr_err("%s: packet malloc failed", __func__);
250 return SR_ERR_MALLOC;
253 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
254 sr_err("%s: header malloc failed", __func__);
255 return SR_ERR_MALLOC;
258 /* Send header packet to the session bus. */
259 packet->type = SR_DF_HEADER;
260 packet->payload = (unsigned char *)header;
261 header->feed_version = 1;
262 gettimeofday(&header->starttime, NULL);
263 sr_session_send(cb_data, packet);
265 /* Send metadata about the SR_DF_LOGIC packets to come. */
266 packet->type = SR_DF_META_LOGIC;
267 packet->payload = &meta;
268 meta.samplerate = vdev->samplerate;
269 meta.num_probes = vdev->num_probes;
270 sr_session_send(cb_data, packet);
279 SR_PRIV struct sr_dev_driver session_driver = {
280 .name = "virtual-session",
281 .longname = "Session-emulating driver",
284 .cleanup = hw_cleanup,
285 .dev_open = hw_dev_open,
287 .info_get = hw_info_get,
288 .dev_config_set = hw_dev_config_set,
289 .dev_acquisition_start = hw_dev_acquisition_start,
290 .dev_acquisition_stop = NULL,