2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 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 subsystem-specific prefix string. */
30 #define LOG_PREFIX "virtual-session: "
31 #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
32 #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
33 #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
34 #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
35 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
36 #define sr_err(s, args...) sr_err(LOG_PREFIX 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_CONF_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 config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
153 struct session_vdev *vdev;
156 case SR_CONF_SAMPLERATE:
159 *data = g_variant_new_uint64(vdev->samplerate);
170 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
172 struct session_vdev *vdev;
177 case SR_CONF_SAMPLERATE:
178 vdev->samplerate = g_variant_get_uint64(data);
179 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
181 case SR_CONF_SESSIONFILE:
182 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
183 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
185 case SR_CONF_CAPTUREFILE:
186 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
187 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
189 case SR_CONF_CAPTURE_UNITSIZE:
190 vdev->unitsize = g_variant_get_uint64(data);
192 case SR_CONF_CAPTURE_NUM_PROBES:
193 vdev->num_probes = g_variant_get_uint64(data);
196 sr_err("Unknown capability: %d.", id);
203 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
209 case SR_CONF_DEVICE_OPTIONS:
210 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
211 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
220 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
224 struct session_vdev *vdev;
229 sr_info("Opening archive %s file %s", vdev->sessionfile,
232 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
233 sr_err("Failed to open session file '%s': "
234 "zip error %d\n", vdev->sessionfile, ret);
238 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
239 sr_err("Failed to check capture file '%s' in "
240 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
244 if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
245 sr_err("Failed to open capture file '%s' in "
246 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
250 /* Send header packet to the session bus. */
251 std_session_send_df_header(cb_data, LOG_PREFIX);
253 /* freewheeling source */
254 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
260 SR_PRIV struct sr_dev_driver session_driver = {
261 .name = "virtual-session",
262 .longname = "Session-emulating driver",
265 .cleanup = hw_cleanup,
266 .config_get = config_get,
267 .config_set = config_set,
268 .config_list = config_list,
269 .dev_open = hw_dev_open,
271 .dev_acquisition_start = hw_dev_acquisition_start,
272 .dev_acquisition_stop = NULL,