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 #define LOG_PREFIX "virtual-session"
31 /* size of payloads sent across the session bus */
33 #define CHUNKSIZE (512 * 1024)
40 struct zip_file *capfile;
48 static GSList *dev_insts = NULL;
49 static const int hwcaps[] = {
51 SR_CONF_CAPTURE_UNITSIZE,
55 static int receive_data(int fd, int revents, void *cb_data)
57 struct sr_dev_inst *sdi;
58 struct session_vdev *vdev;
59 struct sr_datafeed_packet packet;
60 struct sr_datafeed_logic logic;
71 for (l = dev_insts; l; l = l->next) {
73 if (!(vdev = sdi->priv))
74 /* Already done with this instance. */
78 /* No capture file opened yet, or finished with the last
80 if (vdev->cur_chunk == 0) {
81 /* capturefile is always the unchunked base name. */
82 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
83 /* No chunks, just a single capture file. */
85 if (!(vdev->capfile = zip_fopen(vdev->archive,
86 vdev->capturefile, 0)))
88 sr_dbg("Opened %s.", vdev->capturefile);
90 /* Try as first chunk filename. */
91 snprintf(capturefile, 15, "%s-1", vdev->capturefile);
92 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
94 if (!(vdev->capfile = zip_fopen(vdev->archive,
97 sr_dbg("Opened %s.", capturefile);
99 sr_err("No capture file '%s' in " "session file '%s'.",
100 vdev->capturefile, vdev->sessionfile);
105 /* Capture data is chunked, advance to the next chunk. */
107 snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
109 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
110 if (!(vdev->capfile = zip_fopen(vdev->archive,
113 sr_dbg("Opened %s.", capturefile);
115 /* We got all the chunks, finish up. */
116 g_free(vdev->capturefile);
124 if (!(buf = g_try_malloc(CHUNKSIZE))) {
125 sr_err("%s: buf malloc failed", __func__);
129 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
132 packet.type = SR_DF_LOGIC;
133 packet.payload = &logic;
135 logic.unitsize = vdev->unitsize;
137 vdev->bytes_read += ret;
138 sr_session_send(cb_data, &packet);
140 /* done with this capture file */
141 zip_fclose(vdev->capfile);
142 vdev->capfile = NULL;
143 if (vdev->cur_chunk == 0) {
144 /* It was the only file. */
145 g_free(vdev->capturefile);
149 /* There might be more chunks, so don't fall through
150 * to the SR_DF_END here. */
159 packet.type = SR_DF_END;
160 sr_session_send(cb_data, &packet);
161 sr_session_source_remove(-1);
167 /* driver callbacks */
169 static int init(struct sr_context *sr_ctx)
176 static int cleanup(void)
180 for (l = dev_insts; l; l = l->next)
181 sr_dev_inst_free(l->data);
182 g_slist_free(dev_insts);
188 static int dev_open(struct sr_dev_inst *sdi)
190 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
191 sr_err("Device context malloc failed.");
192 return SR_ERR_MALLOC;
195 dev_insts = g_slist_append(dev_insts, sdi);
200 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
201 const struct sr_probe_group *probe_group)
203 struct session_vdev *vdev;
208 case SR_CONF_SAMPLERATE:
211 *data = g_variant_new_uint64(vdev->samplerate);
222 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
223 const struct sr_probe_group *probe_group)
225 struct session_vdev *vdev;
232 case SR_CONF_SAMPLERATE:
233 vdev->samplerate = g_variant_get_uint64(data);
234 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
236 case SR_CONF_SESSIONFILE:
237 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
238 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
240 case SR_CONF_CAPTUREFILE:
241 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
242 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
244 case SR_CONF_CAPTURE_UNITSIZE:
245 vdev->unitsize = g_variant_get_uint64(data);
247 case SR_CONF_NUM_LOGIC_PROBES:
248 vdev->num_probes = g_variant_get_uint64(data);
257 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
258 const struct sr_probe_group *probe_group)
264 case SR_CONF_DEVICE_OPTIONS:
265 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
266 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
275 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
277 struct session_vdev *vdev;
282 sr_info("Opening archive %s file %s", vdev->sessionfile,
285 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
286 sr_err("Failed to open session file '%s': "
287 "zip error %d.", vdev->sessionfile, ret);
291 /* Send header packet to the session bus. */
292 std_session_send_df_header(cb_data, LOG_PREFIX);
294 /* freewheeling source */
295 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
301 SR_PRIV struct sr_dev_driver session_driver = {
302 .name = "virtual-session",
303 .longname = "Session-emulating driver",
310 .config_get = config_get,
311 .config_set = config_set,
312 .config_list = config_list,
313 .dev_open = dev_open,
315 .dev_acquisition_start = dev_acquisition_start,
316 .dev_acquisition_stop = NULL,