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 extern struct sr_session *sr_current_session;
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;
74 for (l = dev_insts; l; l = l->next) {
78 /* Already done with this instance. */
82 /* No capture file opened yet, or finished with the last
84 if (vdev->cur_chunk == 0) {
85 /* capturefile is always the unchunked base name. */
86 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
87 /* No chunks, just a single capture file. */
89 if (!(vdev->capfile = zip_fopen(vdev->archive,
90 vdev->capturefile, 0)))
92 sr_dbg("Opened %s.", vdev->capturefile);
94 /* Try as first chunk filename. */
95 snprintf(capturefile, 15, "%s-1", vdev->capturefile);
96 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
98 if (!(vdev->capfile = zip_fopen(vdev->archive,
101 sr_dbg("Opened %s.", capturefile);
103 sr_err("No capture file '%s' in " "session file '%s'.",
104 vdev->capturefile, vdev->sessionfile);
109 /* Capture data is chunked, advance to the next chunk. */
111 snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
113 if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
114 if (!(vdev->capfile = zip_fopen(vdev->archive,
117 sr_dbg("Opened %s.", capturefile);
119 /* We got all the chunks, finish up. */
120 vdev->finished = TRUE;
126 if (!(buf = g_try_malloc(CHUNKSIZE))) {
127 sr_err("%s: buf malloc failed", __func__);
131 ret = zip_fread(vdev->capfile, buf,
132 CHUNKSIZE / vdev->unitsize * vdev->unitsize);
134 if (ret % vdev->unitsize != 0)
135 sr_warn("Read size %d not a multiple of the"
136 " unit size %d.", ret, vdev->unitsize);
138 packet.type = SR_DF_LOGIC;
139 packet.payload = &logic;
141 logic.unitsize = vdev->unitsize;
143 vdev->bytes_read += ret;
144 sr_session_send(cb_data, &packet);
146 /* done with this capture file */
147 zip_fclose(vdev->capfile);
148 vdev->capfile = NULL;
149 if (vdev->cur_chunk == 0) {
150 /* It was the only file. */
151 vdev->finished = TRUE;
153 /* There might be more chunks, so don't fall through
154 * to the SR_DF_END here. */
163 packet.type = SR_DF_END;
164 sr_session_send(cb_data, &packet);
165 sr_session_source_remove(sr_current_session, -1);
171 /* driver callbacks */
173 static int init(struct sr_context *sr_ctx)
180 static int dev_clear(void)
184 for (l = dev_insts; l; l = l->next)
185 sr_dev_inst_free(l->data);
186 g_slist_free(dev_insts);
192 static int dev_open(struct sr_dev_inst *sdi)
194 struct session_vdev *vdev;
196 vdev = g_try_malloc0(sizeof(struct session_vdev));
198 dev_insts = g_slist_append(dev_insts, sdi);
203 static int dev_close(struct sr_dev_inst *sdi)
205 const struct session_vdev *const vdev = sdi->priv;
206 g_free(vdev->sessionfile);
207 g_free(vdev->capturefile);
215 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
216 const struct sr_channel_group *cg)
218 struct session_vdev *vdev;
223 case SR_CONF_SAMPLERATE:
226 *data = g_variant_new_uint64(vdev->samplerate);
237 static int config_set(int id, 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(int 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_INT32,
283 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
292 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
294 struct session_vdev *vdev;
299 vdev->bytes_read = 0;
301 vdev->finished = FALSE;
303 sr_info("Opening archive %s file %s", vdev->sessionfile,
306 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
307 sr_err("Failed to open session file '%s': "
308 "zip error %d.", vdev->sessionfile, ret);
312 /* Send header packet to the session bus. */
313 std_session_send_df_header(cb_data, LOG_PREFIX);
315 /* freewheeling source */
316 sr_session_source_add(sr_current_session, -1, 0, 0, receive_data, cb_data);
322 SR_PRIV struct sr_dev_driver session_driver = {
323 .name = "virtual-session",
324 .longname = "Session-emulating driver",
327 .cleanup = dev_clear,
330 .dev_clear = dev_clear,
331 .config_get = config_get,
332 .config_set = config_set,
333 .config_list = config_list,
334 .dev_open = dev_open,
335 .dev_close = dev_close,
336 .dev_acquisition_start = dev_acquisition_start,
337 .dev_acquisition_stop = NULL,