2 * This file is part of the sigrok project.
4 * Copyright (C) 2011 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>
27 #include "sigrok-internal.h"
29 /* size of payloads sent across the session bus */
30 #define CHUNKSIZE 4096
32 struct session_vdevice {
35 struct zip_file *capfile;
42 static char *sessionfile = NULL;
43 static GSList *device_instances = NULL;
44 static int capabilities[] = {
46 SR_HWCAP_CAPTURE_UNITSIZE,
50 static struct session_vdevice *get_vdevice_by_index(int device_index)
52 struct sr_device_instance *sdi;
53 struct session_vdevice *vdevice;
55 if (!(sdi = sr_get_device_instance(device_instances, device_index)))
63 static int feed_chunk(int fd, int revents, void *session_data)
65 struct sr_device_instance *sdi;
66 struct session_vdevice *vdevice;
67 struct sr_datafeed_packet packet;
68 struct sr_datafeed_logic logic;
69 uint64_t sample_period_ps;
74 /* Avoid compiler warnings. */
78 sr_dbg("session_driver: feed chunk");
81 for (l = device_instances; l; l = l->next) {
85 /* already done with this instance */
88 if (!(buf = g_try_malloc(CHUNKSIZE))) {
89 sr_err("session: %s: buf malloc failed", __func__);
90 // return SR_ERR_MALLOC;
94 ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE);
97 packet.type = SR_DF_LOGIC;
98 sample_period_ps = 1000000000000 / vdevice->samplerate;
99 packet.timeoffset = sample_period_ps * (vdevice->bytes_read / vdevice->unitsize);
100 packet.duration = sample_period_ps * (ret / vdevice->unitsize);
101 packet.payload = &logic;
103 logic.unitsize = vdevice->unitsize;
105 vdevice->bytes_read += ret;
106 sr_session_bus(session_data, &packet);
108 /* done with this capture file */
109 zip_fclose(vdevice->capfile);
110 g_free(vdevice->capturefile);
117 packet.type = SR_DF_END;
118 sr_session_bus(session_data, &packet);
124 /* driver callbacks */
125 static void hw_cleanup(void);
127 static int hw_init(const char *deviceinfo)
131 sessionfile = g_strdup(deviceinfo);
136 static void hw_cleanup(void)
140 for (l = device_instances; l; l = l->next)
141 sr_device_instance_free(l->data);
143 g_slist_free(device_instances);
144 device_instances = NULL;
146 sr_session_source_remove(-1);
151 static int hw_opendev(int device_index)
153 struct sr_device_instance *sdi;
155 sdi = sr_device_instance_new(device_index, SR_ST_INITIALIZING,
160 if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdevice)))) {
161 sr_err("session: %s: sdi->priv malloc failed", __func__);
162 return SR_ERR_MALLOC;
165 device_instances = g_slist_append(device_instances, sdi);
170 static void *hw_get_device_info(int device_index, int device_info_id)
172 struct session_vdevice *vdevice;
175 if (device_info_id != SR_DI_CUR_SAMPLERATE)
178 if (!(vdevice = get_vdevice_by_index(device_index)))
181 info = &vdevice->samplerate;
186 static int hw_get_status(int device_index)
188 /* Avoid compiler warnings. */
191 if (sr_device_list() != NULL)
197 static int *hw_get_capabilities(void)
202 static int hw_set_configuration(int device_index, int capability, void *value)
204 struct session_vdevice *vdevice;
207 if (!(vdevice = get_vdevice_by_index(device_index)))
210 switch (capability) {
211 case SR_HWCAP_SAMPLERATE:
213 vdevice->samplerate = *tmp_u64;
215 case SR_HWCAP_CAPTUREFILE:
216 vdevice->capturefile = g_strdup(value);
218 case SR_HWCAP_CAPTURE_UNITSIZE:
220 vdevice->unitsize = *tmp_u64;
222 case SR_HWCAP_CAPTURE_NUM_PROBES:
224 vdevice->num_probes = *tmp_u64;
233 static int hw_start_acquisition(int device_index, gpointer session_device_id)
236 struct session_vdevice *vdevice;
237 struct sr_datafeed_header *header;
238 struct sr_datafeed_packet *packet;
241 /* Avoid compiler warnings. */
242 (void)session_device_id;
244 if (!(vdevice = get_vdevice_by_index(device_index)))
247 sr_info("session_driver: opening archive %s file %s", sessionfile,
248 vdevice->capturefile);
250 if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) {
251 sr_warn("Failed to open session file '%s': zip error %d\n",
256 if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) {
257 sr_warn("Failed to check capture file '%s' in session file '%s'.",
258 vdevice->capturefile, sessionfile);
262 if (!(vdevice->capfile = zip_fopen(vdevice->archive, vdevice->capturefile, 0))) {
263 sr_warn("Failed to open capture file '%s' in session file '%s'.",
264 vdevice->capturefile, sessionfile);
268 /* freewheeling source */
269 sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id);
271 if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
272 sr_err("session: %s: packet malloc failed", __func__);
273 return SR_ERR_MALLOC;
276 if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
277 sr_err("session: %s: header malloc failed", __func__);
278 return SR_ERR_MALLOC;
281 /* Send header packet to the session bus. */
282 packet->type = SR_DF_HEADER;
283 packet->payload = (unsigned char *)header;
284 header->feed_version = 1;
285 gettimeofday(&header->starttime, NULL);
286 header->samplerate = vdevice->samplerate;
287 header->num_logic_probes = vdevice->num_probes;
288 header->num_analog_probes = 0;
289 sr_session_bus(session_device_id, packet);
296 /* Not static, it's used elsewhere (via 'extern'). */
297 struct sr_device_plugin session_driver = {
299 "Session-emulating driver",
308 hw_set_configuration,
309 hw_start_acquisition,