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;
49 static GSList *dev_insts = NULL;
50 static const int hwcaps[] = {
52 SR_CONF_CAPTURE_UNITSIZE,
56 static int receive_data(int fd, int revents, void *cb_data)
58 struct sr_dev_inst *sdi;
59 struct session_vdev *vdev;
60 struct sr_datafeed_packet packet;
61 struct sr_datafeed_logic logic;
72 for (l = dev_insts; l; l = l->next) {
76 /* Already done with this instance. */
80 /* No capture file opened yet, or finished with the last
82 if (vdev->cur_chunk == 0) {
83 /* capturefile is always the unchunked base name. */
84 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
85 /* No chunks, just a single capture file. */
87 if (!(vdev->capfile = zip_fopen(vdev->archive,
88 vdev->capturefile, 0)))
90 sr_dbg("Opened %s.", vdev->capturefile);
92 /* Try as first chunk filename. */
93 snprintf(capturefile, 15, "%s-1", vdev->capturefile);
94 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
96 if (!(vdev->capfile = zip_fopen(vdev->archive,
99 sr_dbg("Opened %s.", capturefile);
101 sr_err("No capture file '%s' in " "session file '%s'.",
102 vdev->capturefile, vdev->sessionfile);
107 /* Capture data is chunked, advance to the next chunk. */
109 snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
111 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
112 if (!(vdev->capfile = zip_fopen(vdev->archive,
115 sr_dbg("Opened %s.", capturefile);
117 /* We got all the chunks, finish up. */
118 g_free(vdev->capturefile);
119 vdev->finished = TRUE;
125 if (!(buf = g_try_malloc(CHUNKSIZE))) {
126 sr_err("%s: buf malloc failed", __func__);
130 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
133 packet.type = SR_DF_LOGIC;
134 packet.payload = &logic;
136 logic.unitsize = vdev->unitsize;
138 vdev->bytes_read += ret;
139 sr_session_send(cb_data, &packet);
141 /* done with this capture file */
142 zip_fclose(vdev->capfile);
143 vdev->capfile = NULL;
144 if (vdev->cur_chunk == 0) {
145 /* It was the only file. */
146 g_free(vdev->capturefile);
147 vdev->finished = TRUE;
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 dev_clear(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 struct session_vdev *vdev;
192 vdev = g_try_malloc0(sizeof(struct session_vdev));
194 dev_insts = g_slist_append(dev_insts, sdi);
199 static int dev_close(struct sr_dev_inst *sdi)
207 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
208 const struct sr_probe_group *probe_group)
210 struct session_vdev *vdev;
215 case SR_CONF_SAMPLERATE:
218 *data = g_variant_new_uint64(vdev->samplerate);
229 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
230 const struct sr_probe_group *probe_group)
232 struct session_vdev *vdev;
239 case SR_CONF_SAMPLERATE:
240 vdev->samplerate = g_variant_get_uint64(data);
241 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
243 case SR_CONF_SESSIONFILE:
244 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
245 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
247 case SR_CONF_CAPTUREFILE:
248 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
249 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
251 case SR_CONF_CAPTURE_UNITSIZE:
252 vdev->unitsize = g_variant_get_uint64(data);
254 case SR_CONF_NUM_LOGIC_PROBES:
255 vdev->num_probes = g_variant_get_uint64(data);
264 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
265 const struct sr_probe_group *probe_group)
271 case SR_CONF_DEVICE_OPTIONS:
272 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
273 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
282 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
284 struct session_vdev *vdev;
289 sr_info("Opening archive %s file %s", vdev->sessionfile,
292 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
293 sr_err("Failed to open session file '%s': "
294 "zip error %d.", vdev->sessionfile, ret);
298 /* Send header packet to the session bus. */
299 std_session_send_df_header(cb_data, LOG_PREFIX);
301 /* freewheeling source */
302 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
308 SR_PRIV struct sr_dev_driver session_driver = {
309 .name = "virtual-session",
310 .longname = "Session-emulating driver",
313 .cleanup = dev_clear,
316 .dev_clear = dev_clear,
317 .config_get = config_get,
318 .config_set = config_set,
319 .config_list = config_list,
320 .dev_open = dev_open,
321 .dev_close = dev_close,
322 .dev_acquisition_start = dev_acquisition_start,
323 .dev_acquisition_stop = NULL,