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;
55 static GSList *dev_insts = NULL;
56 static const int hwcaps[] = {
58 SR_CONF_CAPTURE_UNITSIZE,
62 static int receive_data(int fd, int revents, void *cb_data)
64 struct sr_dev_inst *sdi;
65 struct session_vdev *vdev;
66 struct sr_datafeed_packet packet;
67 struct sr_datafeed_logic logic;
78 for (l = dev_insts; l; l = l->next) {
80 if (!(vdev = sdi->priv))
81 /* Already done with this instance. */
84 if (!(buf = g_try_malloc(CHUNKSIZE))) {
85 sr_err("%s: buf malloc failed", __func__);
90 /* No capture file opened yet, or finished with the last
92 if (vdev->cur_chunk == 0) {
93 /* capturefile is always the unchunked base name. */
94 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
95 /* No chunks, just a single capture file. */
97 if (!(vdev->capfile = zip_fopen(vdev->archive,
98 vdev->capturefile, 0)))
100 sr_dbg("Opened %s.", vdev->capturefile);
102 /* Try as first chunk filename. */
103 snprintf(capturefile, 15, "%s-1", vdev->capturefile);
104 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
106 if (!(vdev->capfile = zip_fopen(vdev->archive,
109 sr_dbg("Opened %s.", capturefile);
111 sr_err("No capture file '%s' in " "session file '%s'.",
112 vdev->capturefile, vdev->sessionfile);
117 /* Capture data is chunked, advance to the next chunk. */
119 snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
121 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
122 if (!(vdev->capfile = zip_fopen(vdev->archive,
125 sr_dbg("Opened %s.", capturefile);
127 /* We got all the chunks, finish up. */
128 g_free(vdev->capturefile);
136 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
139 packet.type = SR_DF_LOGIC;
140 packet.payload = &logic;
142 logic.unitsize = vdev->unitsize;
144 vdev->bytes_read += ret;
145 sr_session_send(cb_data, &packet);
147 /* done with this capture file */
148 zip_fclose(vdev->capfile);
149 vdev->capfile = NULL;
150 if (vdev->cur_chunk == 0) {
151 /* It was the only file. */
152 g_free(vdev->capturefile);
156 /* There might be more chunks, so don't fall through
157 * to the SR_DF_END here. */
164 packet.type = SR_DF_END;
165 sr_session_send(cb_data, &packet);
166 sr_session_source_remove(-1);
172 /* driver callbacks */
174 static int init(struct sr_context *sr_ctx)
181 static int cleanup(void)
185 for (l = dev_insts; l; l = l->next)
186 sr_dev_inst_free(l->data);
187 g_slist_free(dev_insts);
193 static int dev_open(struct sr_dev_inst *sdi)
195 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
196 sr_err("Device context malloc failed.");
197 return SR_ERR_MALLOC;
200 dev_insts = g_slist_append(dev_insts, sdi);
205 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
206 const struct sr_probe_group *probe_group)
208 struct session_vdev *vdev;
213 case SR_CONF_SAMPLERATE:
216 *data = g_variant_new_uint64(vdev->samplerate);
227 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
228 const struct sr_probe_group *probe_group)
230 struct session_vdev *vdev;
237 case SR_CONF_SAMPLERATE:
238 vdev->samplerate = g_variant_get_uint64(data);
239 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
241 case SR_CONF_SESSIONFILE:
242 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
243 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
245 case SR_CONF_CAPTUREFILE:
246 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
247 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
249 case SR_CONF_CAPTURE_UNITSIZE:
250 vdev->unitsize = g_variant_get_uint64(data);
252 case SR_CONF_CAPTURE_NUM_PROBES:
253 vdev->num_probes = g_variant_get_uint64(data);
262 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
263 const struct sr_probe_group *probe_group)
269 case SR_CONF_DEVICE_OPTIONS:
270 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
271 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
280 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
282 struct session_vdev *vdev;
287 sr_info("Opening archive %s file %s", vdev->sessionfile,
290 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
291 sr_err("Failed to open session file '%s': "
292 "zip error %d\n", vdev->sessionfile, ret);
296 /* Send header packet to the session bus. */
297 std_session_send_df_header(cb_data, LOG_PREFIX);
299 /* freewheeling source */
300 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
306 SR_PRIV struct sr_dev_driver session_driver = {
307 .name = "virtual-session",
308 .longname = "Session-emulating driver",
315 .config_get = config_get,
316 .config_set = config_set,
317 .config_list = config_list,
318 .dev_open = dev_open,
320 .dev_acquisition_start = dev_acquisition_start,
321 .dev_acquisition_stop = NULL,