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)
36 SR_PRIV struct sr_dev_driver session_driver_info;
37 static struct sr_dev_driver *di = &session_driver_info;
43 struct zip_file *capfile;
52 static const int hwcaps[] = {
54 SR_CONF_CAPTURE_UNITSIZE,
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 if (!(buf = g_try_malloc(CHUNKSIZE))) {
122 sr_err("%s: buf malloc failed", __func__);
126 ret = zip_fread(vdev->capfile, buf,
127 CHUNKSIZE / vdev->unitsize * vdev->unitsize);
129 if (ret % vdev->unitsize != 0)
130 sr_warn("Read size %d not a multiple of the"
131 " unit size %d.", ret, vdev->unitsize);
133 packet.type = SR_DF_LOGIC;
134 packet.payload = &logic;
136 logic.unitsize = vdev->unitsize;
138 vdev->bytes_read += ret;
139 sr_session_send(sdi, &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 vdev->finished = TRUE;
148 /* There might be more chunks, so don't fall through
149 * to the SR_DF_END here. */
158 packet.type = SR_DF_END;
159 sr_session_send(sdi, &packet);
160 sr_session_source_remove(sdi->session, -1);
166 /* driver callbacks */
168 static int init(struct sr_context *sr_ctx)
170 return std_init(sr_ctx, di, LOG_PREFIX);
173 static int dev_clear(void)
175 struct drv_context *drvc;
179 for (l = drvc->instances; l; l = l->next)
180 sr_dev_inst_free(l->data);
181 g_slist_free(drvc->instances);
182 drvc->instances = NULL;
187 static int dev_open(struct sr_dev_inst *sdi)
189 struct drv_context *drvc;
190 struct session_vdev *vdev;
193 vdev = g_malloc0(sizeof(struct session_vdev));
195 drvc->instances = g_slist_append(drvc->instances, sdi);
200 static int dev_close(struct sr_dev_inst *sdi)
202 const struct session_vdev *const vdev = sdi->priv;
203 g_free(vdev->sessionfile);
204 g_free(vdev->capturefile);
212 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
213 const struct sr_channel_group *cg)
215 struct session_vdev *vdev;
220 case SR_CONF_SAMPLERATE:
223 *data = g_variant_new_uint64(vdev->samplerate);
234 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
235 const struct sr_channel_group *cg)
237 struct session_vdev *vdev;
244 case SR_CONF_SAMPLERATE:
245 vdev->samplerate = g_variant_get_uint64(data);
246 sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
248 case SR_CONF_SESSIONFILE:
249 g_free(vdev->sessionfile);
250 vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
251 sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
253 case SR_CONF_CAPTUREFILE:
254 g_free(vdev->capturefile);
255 vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
256 sr_info("Setting capturefile to '%s'.", vdev->capturefile);
258 case SR_CONF_CAPTURE_UNITSIZE:
259 vdev->unitsize = g_variant_get_uint64(data);
261 case SR_CONF_NUM_LOGIC_CHANNELS:
262 vdev->num_channels = g_variant_get_uint64(data);
271 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
272 const struct sr_channel_group *cg)
278 case SR_CONF_DEVICE_OPTIONS:
279 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
280 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
289 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
291 struct session_vdev *vdev;
297 vdev->bytes_read = 0;
299 vdev->finished = FALSE;
301 sr_info("Opening archive %s file %s", vdev->sessionfile,
304 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
305 sr_err("Failed to open session file '%s': "
306 "zip error %d.", vdev->sessionfile, ret);
310 /* Send header packet to the session bus. */
311 std_session_send_df_header(sdi, LOG_PREFIX);
313 /* freewheeling source */
314 sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);
320 SR_PRIV struct sr_dev_driver session_driver = {
321 .name = "virtual-session",
322 .longname = "Session-emulating driver",
325 .cleanup = dev_clear,
328 .dev_clear = dev_clear,
329 .config_get = config_get,
330 .config_set = config_set,
331 .config_list = config_list,
332 .dev_open = dev_open,
333 .dev_close = dev_close,
334 .dev_acquisition_start = dev_acquisition_start,
335 .dev_acquisition_stop = NULL,