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 */
31 #define CHUNKSIZE (512 * 1024)
38 struct zip_file *capfile;
45 static GSList *dev_insts = NULL;
46 static const int hwcaps[] = {
48 SR_HWCAP_CAPTURE_UNITSIZE,
52 static int receive_data(int fd, int revents, void *cb_data)
54 struct sr_dev_inst *sdi;
55 struct session_vdev *vdev;
56 struct sr_datafeed_packet packet;
57 struct sr_datafeed_logic logic;
62 /* Avoid compiler warnings. */
66 sr_dbg("session_driver: feed chunk");
69 for (l = dev_insts; l; l = l->next) {
73 /* already done with this instance */
76 if (!(buf = g_try_malloc(CHUNKSIZE))) {
77 sr_err("session driver: %s: buf malloc failed", __func__);
81 ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
84 packet.type = SR_DF_LOGIC;
85 packet.payload = &logic;
87 logic.unitsize = vdev->unitsize;
89 vdev->bytes_read += ret;
90 sr_session_send(cb_data, &packet);
92 /* done with this capture file */
93 zip_fclose(vdev->capfile);
94 g_free(vdev->capturefile);
101 packet.type = SR_DF_END;
102 sr_session_send(cb_data, &packet);
103 sr_session_source_remove(-1);
109 /* driver callbacks */
110 static int hw_cleanup(void);
112 static int hw_init(void)
118 static int hw_cleanup(void)
122 for (l = dev_insts; l; l = l->next)
123 sr_dev_inst_free(l->data);
124 g_slist_free(dev_insts);
130 static int hw_dev_open(struct sr_dev_inst *sdi)
133 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
134 sr_err("session driver: %s: sdi->priv malloc failed", __func__);
135 return SR_ERR_MALLOC;
138 dev_insts = g_slist_append(dev_insts, sdi);
143 static int hw_info_get(int info_id, const void **data,
144 const struct sr_dev_inst *sdi)
146 struct session_vdev *vdev;
152 case SR_DI_CUR_SAMPLERATE:
155 *data = &vdev->samplerate;
166 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
169 struct session_vdev *vdev;
170 const uint64_t *tmp_u64;
175 case SR_HWCAP_SAMPLERATE:
177 vdev->samplerate = *tmp_u64;
178 sr_info("session driver: setting samplerate to %" PRIu64,
181 case SR_HWCAP_SESSIONFILE:
182 vdev->sessionfile = g_strdup(value);
183 sr_info("session driver: setting sessionfile to %s",
186 case SR_HWCAP_CAPTUREFILE:
187 vdev->capturefile = g_strdup(value);
188 sr_info("session driver: setting capturefile to %s",
191 case SR_HWCAP_CAPTURE_UNITSIZE:
193 vdev->unitsize = *tmp_u64;
195 case SR_HWCAP_CAPTURE_NUM_PROBES:
197 vdev->num_probes = *tmp_u64;
200 sr_err("session driver: %s: unknown capability %d requested",
208 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
212 struct session_vdev *vdev;
213 struct sr_datafeed_header *header;
214 struct sr_datafeed_packet *packet;
215 struct sr_datafeed_meta_logic meta;
220 sr_info("session_driver: opening archive %s file %s", vdev->sessionfile,
223 if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
224 sr_err("session driver: Failed to open session file '%s': "
225 "zip error %d\n", vdev->sessionfile, ret);
229 if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
230 sr_err("session driver: Failed to check capture file '%s' in "
231 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
235 if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
236 sr_err("session driver: Failed to open capture file '%s' in "
237 "session file '%s'.", vdev->capturefile, vdev->sessionfile);
241 /* freewheeling source */
242 sr_session_source_add(-1, 0, 0, receive_data, cb_data);
244 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
245 sr_err("session driver: %s: packet malloc failed", __func__);
246 return SR_ERR_MALLOC;
249 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
250 sr_err("session driver: %s: header malloc failed", __func__);
251 return SR_ERR_MALLOC;
254 /* Send header packet to the session bus. */
255 packet->type = SR_DF_HEADER;
256 packet->payload = (unsigned char *)header;
257 header->feed_version = 1;
258 gettimeofday(&header->starttime, NULL);
259 sr_session_send(cb_data, packet);
261 /* Send metadata about the SR_DF_LOGIC packets to come. */
262 packet->type = SR_DF_META_LOGIC;
263 packet->payload = &meta;
264 meta.samplerate = vdev->samplerate;
265 meta.num_probes = vdev->num_probes;
266 sr_session_send(cb_data, packet);
275 SR_PRIV struct sr_dev_driver session_driver = {
277 .longname = "Session-emulating driver",
280 .cleanup = hw_cleanup,
281 .dev_open = hw_dev_open,
283 .info_get = hw_info_get,
284 .dev_config_set = hw_dev_config_set,
285 .dev_acquisition_start = hw_dev_acquisition_start,
286 .dev_acquisition_stop = NULL,