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/>.
21 #include <sys/types.h>
27 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
30 #define LOG_PREFIX "virtual-session"
32 /* size of payloads sent across the session bus */
34 #define CHUNKSIZE (512 * 1024)
37 SR_PRIV struct sr_dev_driver session_driver_info;
43 struct zip_file *capfile;
52 static const uint32_t devopts[] = {
53 SR_CONF_CAPTUREFILE | SR_CONF_SET,
54 SR_CONF_CAPTURE_UNITSIZE | SR_CONF_GET | SR_CONF_SET,
55 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET,
58 static int receive_data(int fd, int revents, void *cb_data)
60 struct sr_dev_inst *sdi;
61 struct session_vdev *vdev;
62 struct sr_datafeed_packet packet;
63 struct sr_datafeed_logic logic;
75 if (!vdev->finished) {
77 /* No capture file opened yet, or finished with the last
79 if (vdev->cur_chunk == 0) {
80 /* capturefile is always the unchunked base name. */
81 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
82 /* No chunks, just a single capture file. */
84 if (!(vdev->capfile = zip_fopen(vdev->archive,
85 vdev->capturefile, 0)))
87 sr_dbg("Opened %s.", vdev->capturefile);
89 /* Try as first chunk filename. */
90 snprintf(capturefile, 15, "%s-1", vdev->capturefile);
91 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
93 if (!(vdev->capfile = zip_fopen(vdev->archive,
96 sr_dbg("Opened %s.", capturefile);
98 sr_err("No capture file '%s' in " "session file '%s'.",
99 vdev->capturefile, vdev->sessionfile);
104 /* Capture data is chunked, advance to the next chunk. */
106 snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
108 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
109 if (!(vdev->capfile = zip_fopen(vdev->archive,
112 sr_dbg("Opened %s.", capturefile);
114 /* We got all the chunks, finish up. */
115 vdev->finished = TRUE;
121 buf = g_malloc(CHUNKSIZE);
123 ret = zip_fread(vdev->capfile, buf,
124 CHUNKSIZE / vdev->unitsize * vdev->unitsize);
126 if (ret % vdev->unitsize != 0)
127 sr_warn("Read size %d not a multiple of the"
128 " unit size %d.", ret, vdev->unitsize);
130 packet.type = SR_DF_LOGIC;
131 packet.payload = &logic;
133 logic.unitsize = vdev->unitsize;
135 vdev->bytes_read += ret;
136 sr_session_send(sdi, &packet);
138 /* done with this capture file */
139 zip_fclose(vdev->capfile);
140 vdev->capfile = NULL;
141 if (vdev->cur_chunk == 0) {
142 /* It was the only file. */
143 vdev->finished = TRUE;
145 /* There might be more chunks, so don't fall through
146 * to the SR_DF_END here. */
155 packet.type = SR_DF_END;
156 sr_session_send(sdi, &packet);
157 sr_session_source_remove(sdi->session, -1);
163 /* driver callbacks */
165 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
167 return std_init(sr_ctx, di, LOG_PREFIX);
170 static int dev_clear(const struct sr_dev_driver *di)
172 struct drv_context *drvc;
176 for (l = drvc->instances; l; l = l->next)
177 sr_dev_inst_free(l->data);
178 g_slist_free(drvc->instances);
179 drvc->instances = NULL;
184 static int dev_open(struct sr_dev_inst *sdi)
186 struct sr_dev_driver *di;
187 struct drv_context *drvc;
188 struct session_vdev *vdev;
192 vdev = g_malloc0(sizeof(struct session_vdev));
194 drvc->instances = g_slist_append(drvc->instances, sdi);
199 static int dev_close(struct sr_dev_inst *sdi)
201 const struct session_vdev *const vdev = sdi->priv;
202 g_free(vdev->sessionfile);
203 g_free(vdev->capturefile);
211 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
212 const struct sr_channel_group *cg)
214 struct session_vdev *vdev;
224 case SR_CONF_SAMPLERATE:
225 *data = g_variant_new_uint64(vdev->samplerate);
227 case SR_CONF_CAPTURE_UNITSIZE:
228 *data = g_variant_new_uint64(vdev->unitsize);
237 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
238 const struct sr_channel_group *cg)
240 struct session_vdev *vdev;
247 case SR_CONF_SAMPLERATE:
248 vdev->samplerate = g_variant_get_uint64(data);
249 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
251 case SR_CONF_SESSIONFILE:
252 g_free(vdev->sessionfile);
253 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
254 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
256 case SR_CONF_CAPTUREFILE:
257 g_free(vdev->capturefile);
258 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
259 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
261 case SR_CONF_CAPTURE_UNITSIZE:
262 vdev->unitsize = g_variant_get_uint64(data);
264 case SR_CONF_NUM_LOGIC_CHANNELS:
265 vdev->num_channels = g_variant_get_uint64(data);
274 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
275 const struct sr_channel_group *cg)
281 case SR_CONF_DEVICE_OPTIONS:
282 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
283 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
292 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
294 struct session_vdev *vdev;
300 vdev->bytes_read = 0;
302 vdev->finished = FALSE;
304 sr_info("Opening archive %s file %s", vdev->sessionfile,
307 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
308 sr_err("Failed to open session file '%s': "
309 "zip error %d.", vdev->sessionfile, ret);
313 /* Send header packet to the session bus. */
314 std_session_send_df_header(sdi, LOG_PREFIX);
316 /* freewheeling source */
317 sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);
323 SR_PRIV struct sr_dev_driver session_driver = {
324 .name = "virtual-session",
325 .longname = "Session-emulating driver",
328 .cleanup = dev_clear,
331 .dev_clear = dev_clear,
332 .config_get = config_get,
333 .config_set = config_set,
334 .config_list = config_list,
335 .dev_open = dev_open,
336 .dev_close = dev_close,
337 .dev_acquisition_start = dev_acquisition_start,
338 .dev_acquisition_stop = NULL,