Code drop from DreamSourceLabs first source release.

[libsigrok.git] / input / in_binary.c

diff --git a/input/in_binary.c b/input/in_binary.c
new file mode 100644 (file)
index 0000000..2d52c30
--- /dev/null
+++ b/input/in_binary.c
@@ -0,0 +1,158 @@
+/*
+ * 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 <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+
+/* Message logging helpers with subsystem-specific prefix string. */
+#define LOG_PREFIX "input/binary: "
+#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)
+
+#define CHUNKSIZE             (512 * 1024)
+#define DEFAULT_NUM_PROBES    8
+
+struct context {
+       uint64_t samplerate;
+};
+
+static int format_match(const char *filename)
+{
+       (void)filename;
+
+       /* This module will handle anything you throw at it. */
+       return TRUE;
+}
+
+static int init(struct sr_input *in, const char *filename)
+{
+       struct sr_probe *probe;
+       int num_probes, i;
+       char name[SR_MAX_PROBENAME_LEN + 1];
+       char *param;
+       struct context *ctx;
+
+       (void)filename;
+
+       if (!(ctx = g_try_malloc0(sizeof(*ctx)))) {
+               sr_err("Input format context malloc failed.");
+               return SR_ERR_MALLOC;
+       }
+
+       num_probes = DEFAULT_NUM_PROBES;
+       ctx->samplerate = 0;
+
+       if (in->param) {
+               param = g_hash_table_lookup(in->param, "numprobes");
+               if (param) {
+                       num_probes = strtoul(param, NULL, 10);
+                       if (num_probes < 1)
+                               return SR_ERR;
+               }
+
+               param = g_hash_table_lookup(in->param, "samplerate");
+               if (param) {
+                       if (sr_parse_sizestring(param, &ctx->samplerate) != SR_OK)
+                               return SR_ERR;
+               }
+       }
+
+       /* Create a virtual device. */
+       in->sdi = sr_dev_inst_new(LOGIC, 0, SR_ST_ACTIVE, NULL, NULL, NULL);
+       in->internal = ctx;
+
+       for (i = 0; i < num_probes; i++) {
+               snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i);
+               /* TODO: Check return value. */
+               if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, name)))
+                       return SR_ERR;
+               in->sdi->probes = g_slist_append(in->sdi->probes, probe);
+       }
+
+       return SR_OK;
+}
+
+static int loadfile(struct sr_input *in, const char *filename)
+{
+       struct sr_datafeed_packet packet;
+       struct sr_datafeed_meta meta;
+       struct sr_datafeed_logic logic;
+       struct sr_config *src;
+       unsigned char buffer[CHUNKSIZE];
+       int fd, size, num_probes;
+       struct context *ctx;
+
+       ctx = in->internal;
+
+       if ((fd = open(filename, O_RDONLY)) == -1)
+               return SR_ERR;
+
+       num_probes = g_slist_length(in->sdi->probes);
+
+       /* Send header packet to the session bus. */
+       std_session_send_df_header(in->sdi, LOG_PREFIX);
+
+       if (ctx->samplerate) {
+               packet.type = SR_DF_META;
+               packet.payload = &meta;
+               src = sr_config_new(SR_CONF_SAMPLERATE,
+                               g_variant_new_uint64(ctx->samplerate));
+               meta.config = g_slist_append(NULL, src);
+               sr_session_send(in->sdi, &packet);
+               sr_config_free(src);
+       }
+
+       /* Chop up the input file into chunks & send it to the session bus. */
+       packet.type = SR_DF_LOGIC;
+       packet.payload = &logic;
+       logic.unitsize = (num_probes + 7) / 8;
+       logic.data = buffer;
+       while ((size = read(fd, buffer, CHUNKSIZE)) > 0) {
+               logic.length = size;
+               sr_session_send(in->sdi, &packet);
+       }
+       close(fd);
+
+       /* Send end packet to the session bus. */
+       packet.type = SR_DF_END;
+       sr_session_send(in->sdi, &packet);
+
+       g_free(ctx);
+       in->internal = NULL;
+
+       return SR_OK;
+}
+
+SR_PRIV struct sr_input_format input_binary = {
+       .id = "binary",
+       .description = "Raw binary",
+       .format_match = format_match,
+       .init = init,
+       .loadfile = loadfile,
+};