2 * This file is part of the sigrok project.
4 * Copyright (C) 2010-2012 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 /* size of payloads sent across the session bus */
30 #define CHUNKSIZE (512 * 1024)
36 struct zip_file *capfile;
43 static GSList *dev_insts = NULL;
44 static const int hwcaps[] = {
46 SR_HWCAP_CAPTURE_UNITSIZE,
50 static int receive_data(int fd, int revents, void *cb_data)
52 struct sr_dev_inst *sdi;
53 struct session_vdev *vdev;
54 struct sr_datafeed_packet packet;
55 struct sr_datafeed_logic logic;
60 /* Avoid compiler warnings. */
64 sr_dbg("session_driver: feed chunk");
67 for (l = dev_insts; l; l = l->next) {
71 /* already done with this instance */
74 if (!(buf = g_try_malloc(CHUNKSIZE))) {
75 sr_err("session driver: %s: buf malloc failed", __func__);
79 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
82 packet.type = SR_DF_LOGIC;
83 packet.payload = &logic;
85 logic.unitsize = vdev->unitsize;
87 vdev->bytes_read += ret;
88 sr_session_send(cb_data, &packet);
90 /* done with this capture file */
91 zip_fclose(vdev->capfile);
92 g_free(vdev->capturefile);
99 packet.type = SR_DF_END;
100 sr_session_send(cb_data, &packet);
106 /* driver callbacks */
107 static int hw_cleanup(void);
109 static int hw_init(void)
115 static int hw_cleanup(void)
119 for (l = dev_insts; l; l = l->next)
120 sr_dev_inst_free(l->data);
121 g_slist_free(dev_insts);
124 sr_session_source_remove(-1);
129 static int hw_dev_open(struct sr_dev_inst *sdi)
132 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
133 sr_err("session driver: %s: sdi->priv malloc failed", __func__);
134 return SR_ERR_MALLOC;
137 dev_insts = g_slist_append(dev_insts, sdi);
142 static int hw_info_get(int info_id, const void **data,
143 const struct sr_dev_inst *sdi)
145 struct session_vdev *vdev;
151 case SR_DI_CUR_SAMPLERATE:
154 *data = &vdev->samplerate;
165 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
168 struct session_vdev *vdev;
169 const uint64_t *tmp_u64;
174 case SR_HWCAP_SAMPLERATE:
176 vdev->samplerate = *tmp_u64;
177 sr_info("session driver: setting samplerate to %" PRIu64,
180 case SR_HWCAP_SESSIONFILE:
181 vdev->sessionfile = g_strdup(value);
182 sr_info("session driver: setting sessionfile to %s",
185 case SR_HWCAP_CAPTUREFILE:
186 vdev->capturefile = g_strdup(value);
187 sr_info("session driver: setting capturefile to %s",
190 case SR_HWCAP_CAPTURE_UNITSIZE:
192 vdev->unitsize = *tmp_u64;
194 case SR_HWCAP_CAPTURE_NUM_PROBES:
196 vdev->num_probes = *tmp_u64;
199 sr_err("session driver: %s: unknown capability %d requested",
207 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
211 struct session_vdev *vdev;
212 struct sr_datafeed_header *header;
213 struct sr_datafeed_packet *packet;
214 struct sr_datafeed_meta_logic meta;
219 sr_info("session_driver: opening archive %s file %s", vdev->sessionfile,
222 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
223 sr_err("session driver: Failed to open session file '%s': "
224 "zip error %d\n", vdev->sessionfile, ret);
228 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
229 sr_err("session driver: Failed to check capture file '%s' in "
230 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
234 if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
235 sr_err("session driver: Failed to open capture file '%s' in "
236 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
240 /* freewheeling source */
241 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
243 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
244 sr_err("session driver: %s: packet malloc failed", __func__);
245 return SR_ERR_MALLOC;
248 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
249 sr_err("session driver: %s: header malloc failed", __func__);
250 return SR_ERR_MALLOC;
253 /* Send header packet to the session bus. */
254 packet->type = SR_DF_HEADER;
255 packet->payload = (unsigned char *)header;
256 header->feed_version = 1;
257 gettimeofday(&header->starttime, NULL);
258 sr_session_send(cb_data, packet);
260 /* Send metadata about the SR_DF_LOGIC packets to come. */
261 packet->type = SR_DF_META_LOGIC;
262 packet->payload = &meta;
263 meta.samplerate = vdev->samplerate;
264 meta.num_probes = vdev->num_probes;
265 sr_session_send(cb_data, packet);
273 SR_PRIV struct sr_dev_driver session_driver = {
275 .longname = "Session-emulating driver",
278 .cleanup = hw_cleanup,
279 .dev_open = hw_dev_open,
281 .info_get = hw_info_get,
282 .dev_config_set = hw_dev_config_set,
283 .dev_acquisition_start = hw_dev_acquisition_start,
284 .dev_acquisition_stop = NULL,