+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <zip.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "virtual-session: "
-#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
-#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
-#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
-#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
-#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
-#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
-
-/* size of payloads sent across the session bus */
-/** @cond PRIVATE */
-#define CHUNKSIZE (512 * 1024)
-/** @endcond */
-
-struct session_vdev {
- char *sessionfile;
- char *capturefile;
- struct zip *archive;
- struct zip_file *capfile;
- int bytes_read;
- uint64_t samplerate;
- int unitsize;
- int num_probes;
- int cur_chunk;
-};
-
-static GSList *dev_insts = NULL;
-static const int hwcaps[] = {
- SR_CONF_CAPTUREFILE,
- SR_CONF_CAPTURE_UNITSIZE,
- 0,
-};
-
-static int receive_data(int fd, int revents, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct session_vdev *vdev;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- struct zip_stat zs;
- GSList *l;
- int ret, got_data;
- char capturefile[16];
- void *buf;
-
- (void)fd;
- (void)revents;
-
- got_data = FALSE;
- for (l = dev_insts; l; l = l->next) {
- sdi = l->data;
- if (!(vdev = sdi->priv))
- /* Already done with this instance. */
- continue;
-
- if (!vdev->capfile) {
- /* No capture file opened yet, or finished with the last
- * chunked one. */
- if (vdev->cur_chunk == 0) {
- /* capturefile is always the unchunked base name. */
- if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
- /* No chunks, just a single capture file. */
- vdev->cur_chunk = 0;
- if (!(vdev->capfile = zip_fopen(vdev->archive,
- vdev->capturefile, 0)))
- return FALSE;
- sr_dbg("Opened %s.", vdev->capturefile);
- } else {
- /* Try as first chunk filename. */
- snprintf(capturefile, 15, "%s-1", vdev->capturefile);
- if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
- vdev->cur_chunk = 1;
- if (!(vdev->capfile = zip_fopen(vdev->archive,
- capturefile, 0)))
- return FALSE;
- sr_dbg("Opened %s.", capturefile);
- } else {
- sr_err("No capture file '%s' in " "session file '%s'.",
- vdev->capturefile, vdev->sessionfile);
- return FALSE;
- }
- }
- } else {
- /* Capture data is chunked, advance to the next chunk. */
- vdev->cur_chunk++;
- snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
- vdev->cur_chunk);
- if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
- if (!(vdev->capfile = zip_fopen(vdev->archive,
- capturefile, 0)))
- return FALSE;
- sr_dbg("Opened %s.", capturefile);
- } else {
- /* We got all the chunks, finish up. */
- g_free(vdev->capturefile);
- g_free(vdev);
- sdi->priv = NULL;
- continue;
- }
- }
- }
-
- if (!(buf = g_try_malloc(CHUNKSIZE))) {
- sr_err("%s: buf malloc failed", __func__);
- return FALSE;
- }
-
- ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
- if (ret > 0) {
- got_data = TRUE;
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = ret;
- logic.unitsize = vdev->unitsize;
- logic.data = buf;
- vdev->bytes_read += ret;
- sr_session_send(cb_data, &packet);
- } else {
- /* done with this capture file */
- zip_fclose(vdev->capfile);
- vdev->capfile = NULL;
- if (vdev->cur_chunk == 0) {
- /* It was the only file. */
- g_free(vdev->capturefile);
- g_free(vdev);
- sdi->priv = NULL;
- } else {
- /* There might be more chunks, so don't fall through
- * to the SR_DF_END here. */
- g_free(buf);
- return TRUE;
- }
- }
- g_free(buf);
- }
-
- if (!got_data) {
- packet.type = SR_DF_END;
- sr_session_send(cb_data, &packet);
- sr_session_source_remove(-1);
- }
-
- return TRUE;
-}
-
-/* driver callbacks */
-
-static int init(struct sr_context *sr_ctx)
-{
- (void)sr_ctx;
-
- return SR_OK;
-}
-
-static int cleanup(void)
-{
- GSList *l;
-
- for (l = dev_insts; l; l = l->next)
- sr_dev_inst_free(l->data);
- g_slist_free(dev_insts);
- dev_insts = NULL;
-
- return SR_OK;
-}
-
-static int dev_open(struct sr_dev_inst *sdi)
-{
- if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
- sr_err("Device context malloc failed.");
- return SR_ERR_MALLOC;
- }
-
- dev_insts = g_slist_append(dev_insts, sdi);
-
- return SR_OK;
-}
-
-static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- struct session_vdev *vdev;
-
- (void)probe_group;
-
- switch (id) {
- case SR_CONF_SAMPLERATE:
- if (sdi) {
- vdev = sdi->priv;
- *data = g_variant_new_uint64(vdev->samplerate);
- } else
- return SR_ERR;
- break;
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- struct session_vdev *vdev;
-
- (void)probe_group;
-
- vdev = sdi->priv;
-
- switch (id) {
- case SR_CONF_SAMPLERATE:
- vdev->samplerate = g_variant_get_uint64(data);
- sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
- break;
- case SR_CONF_SESSIONFILE:
- vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
- sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
- break;
- case SR_CONF_CAPTUREFILE:
- vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
- sr_info("Setting capturefile to '%s'.", vdev->capturefile);
- break;
- case SR_CONF_CAPTURE_UNITSIZE:
- vdev->unitsize = g_variant_get_uint64(data);
- break;
- case SR_CONF_CAPTURE_NUM_PROBES:
- vdev->num_probes = g_variant_get_uint64(data);
- break;
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
- const struct sr_probe_group *probe_group)
-{
- (void)sdi;
- (void)probe_group;
-
- switch (key) {
- case SR_CONF_DEVICE_OPTIONS:
- *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
- hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
- break;
- default:
- return SR_ERR_NA;
- }
-
- return SR_OK;
-}
-
-static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
-{
- struct session_vdev *vdev;
- int ret;
-
- vdev = sdi->priv;
-
- sr_info("Opening archive %s file %s", vdev->sessionfile,
- vdev->capturefile);
-
- if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
- sr_err("Failed to open session file '%s': "
- "zip error %d\n", vdev->sessionfile, ret);
- return SR_ERR;
- }
-
- /* Send header packet to the session bus. */
- std_session_send_df_header(cb_data, LOG_PREFIX);
-
- /* freewheeling source */
- sr_session_source_add(-1, 0, 0, receive_data, cb_data);
-
- return SR_OK;
-}
-
-/** @private */
-SR_PRIV struct sr_dev_driver session_driver = {
- .name = "virtual-session",
- .longname = "Session-emulating driver",
- .api_version = 1,
- .init = init,
- .cleanup = cleanup,
- .scan = NULL,
- .dev_list = NULL,
- .dev_clear = NULL,
- .config_get = config_get,
- .config_set = config_set,
- .config_list = config_list,
- .dev_open = dev_open,
- .dev_close = NULL,
- .dev_acquisition_start = dev_acquisition_start,
- .dev_acquisition_stop = NULL,
- .priv = NULL,
-};
projects / libsigrok.git / blobdiff