X-Git-Url: https://sigrok.org/gitweb/?p=sigrok-cli.git;a=blobdiff_plain;f=session.c;h=6465055a1c00f05dc3186066b17728bbca1e819e;hp=a8a647a35079c9a0ad5223319df77b24377523e9;hb=d26a362ef5ffe2f2ff2c0a4668925d554e378787;hpb=ad54a1a630e6887204bc57a95075f403fd44aa6c

diff --git a/session.c b/session.c
index a8a647a..6465055 100644
--- a/session.c
+++ b/session.c
@@ -18,51 +18,19 @@
  */
 
 #include "sigrok-cli.h"
-#include "config.h"
 #include <glib.h>
 #include <glib/gstdio.h>
+#include <string.h>
+#include <stdlib.h>
 
-static struct sr_output_format *output_format = NULL;
 static int default_output_format = FALSE;
-static char *output_format_param = NULL;
-static GByteArray *savebuf;
 static uint64_t limit_samples = 0;
 static uint64_t limit_frames = 0;
 
-extern gchar *opt_output_file;
-extern gchar *opt_output_format;
-extern gchar *opt_pds;
-extern gboolean opt_wait_trigger;
-extern gchar *opt_time;
-extern gchar *opt_samples;
-extern gchar *opt_frames;
-extern gchar *opt_continuous;
-extern gchar *opt_config;
-extern gchar *opt_triggers;
 #ifdef HAVE_SRD
 extern struct srd_session *srd_sess;
 #endif
 
-
-static GArray *get_enabled_logic_probes(const struct sr_dev_inst *sdi)
-{
-	struct sr_probe *probe;
-	GArray *probes;
-	GSList *l;
-
-	probes = g_array_new(FALSE, FALSE, sizeof(int));
-	for (l = sdi->probes; l; l = l->next) {
-		probe = l->data;
-		if (probe->type != SR_PROBE_LOGIC)
-			continue;
-		if (probe->enabled != TRUE)
-			continue;
-		g_array_append_val(probes, probe->index);
-	}
-
-	return probes;
-}
-
 static int set_limit_time(const struct sr_dev_inst *sdi)
 {
 	GVariant *gvar;
@@ -103,13 +71,37 @@ static int set_limit_time(const struct sr_dev_inst *sdi)
 	return SR_OK;
 }
 
-int setup_output_format(void)
+GHashTable *generic_arg_to_opt(const struct sr_option *opts, GHashTable *genargs)
 {
-	GHashTable *fmtargs;
-	GHashTableIter iter;
-	gpointer key, value;
-	struct sr_output_format **outputs;
-	int i;
+	GHashTable *hash;
+	GVariant *gvar;
+	const struct sr_option *opt;
+	char *s;
+
+	hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
+			(GDestroyNotify)g_variant_unref);
+	for (opt = opts; opt->id && opt->def; opt++) {
+		if (!(s = g_hash_table_lookup(genargs, opt->id)))
+			continue;
+		if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE_UINT32)) {
+			gvar = g_variant_new_uint32(strtoul(s, NULL, 10));
+			g_hash_table_insert(hash, g_strdup(opt->id),
+					g_variant_ref_sink(gvar));
+		} else {
+			g_critical("Don't know how to convert option '%s' to %s!",
+					opt->id, g_variant_get_type_string(opt->def));
+		 }
+	}
+
+	return hash;
+}
+
+const struct sr_output *setup_output_format(const struct sr_dev_inst *sdi)
+{
+	const struct sr_output_module *omod;
+	const struct sr_option *opts;
+	const struct sr_output *o;
+	GHashTable *fmtargs, *fmtopts;
 	char *fmtspec;
 
 	if (opt_output_format && !strcmp(opt_output_format, "sigrok")) {
@@ -129,32 +121,22 @@ int setup_output_format(void)
 
 	fmtargs = parse_generic_arg(opt_output_format, TRUE);
 	fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
-	if (!fmtspec) {
+	if (!fmtspec)
 		g_critical("Invalid output format.");
-		return 1;
-	}
-	outputs = sr_output_list();
-	for (i = 0; outputs[i]; i++) {
-		if (strcmp(outputs[i]->id, fmtspec))
-			continue;
-		g_hash_table_remove(fmtargs, "sigrok_key");
-		output_format = outputs[i];
-		g_hash_table_iter_init(&iter, fmtargs);
-		while (g_hash_table_iter_next(&iter, &key, &value)) {
-			/* only supporting one parameter per output module
-			 * for now, and only its value */
-			output_format_param = g_strdup(value);
-			break;
-		}
-		break;
-	}
-	if (!output_format) {
-		g_critical("Invalid output format %s.", opt_output_format);
-		return 1;
-	}
+	if (!(omod = sr_output_find(fmtspec)))
+		g_critical("Unknown output format '%s'.", fmtspec);
+	g_hash_table_remove(fmtargs, "sigrok_key");
+	if ((opts = sr_output_options_get(omod))) {
+		fmtopts = generic_arg_to_opt(opts, fmtargs);
+		sr_output_options_free(omod);
+	} else
+		fmtopts = NULL;
+	o = sr_output_new(omod, fmtopts, sdi);
+	if (fmtopts)
+		g_hash_table_destroy(fmtopts);
 	g_hash_table_destroy(fmtargs);
 
-	return 0;
+	return o;
 }
 
 void datafeed_in(const struct sr_dev_inst *sdi,
@@ -163,72 +145,59 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 	const struct sr_datafeed_meta *meta;
 	const struct sr_datafeed_logic *logic;
 	const struct sr_datafeed_analog *analog;
+	struct sr_session *session;
 	struct sr_config *src;
-	static struct sr_output *o = NULL;
-	static GArray *logic_probelist = NULL;
-	static uint64_t received_samples = 0;
-	static int unitsize = 0;
+	struct sr_channel *ch;
+	static const struct sr_output *o = NULL;
+	static const struct sr_output *oa = NULL;
+	static uint64_t rcvd_samples_logic = 0;
+	static uint64_t rcvd_samples_analog = 0;
+	static uint64_t samplerate = 0;
 	static int triggered = 0;
 	static FILE *outfile = NULL;
 	GSList *l;
 	GString *out;
-	int sample_size, ret;
-	uint64_t samplerate, output_len, filter_out_len, end_sample;
-	uint8_t *output_buf, *filter_out;
-
-	(void) cb_data;
+	GVariant *gvar;
+	uint64_t end_sample;
+	uint64_t input_len;
+	int i;
+	char **channels;
 
 	/* If the first packet to come in isn't a header, don't even try. */
 	if (packet->type != SR_DF_HEADER && o == NULL)
 		return;
 
-	sample_size = -1;
+	session = cb_data;
 	switch (packet->type) {
 	case SR_DF_HEADER:
-		g_debug("cli: Received SR_DF_HEADER");
-		/* Initialize the output module. */
-		if (!(o = g_try_malloc(sizeof(struct sr_output)))) {
-			g_critical("Output module malloc failed.");
-			exit(1);
-		}
-		o->format = output_format;
-		o->sdi = (struct sr_dev_inst *)sdi;
-		o->param = output_format_param;
-		if (o->format->init) {
-			if (o->format->init(o) != SR_OK) {
-				g_critical("Output format initialization failed.");
-				exit(1);
-			}
-		}
+		g_debug("cli: Received SR_DF_HEADER.");
+		o = setup_output_format(sdi);
+
+		/* Set up backup analog output module. */
+		oa = sr_output_new(sr_output_find("analog"), NULL, sdi);
 
 		/* Prepare non-stdout output. */
 		outfile = stdout;
 		if (opt_output_file) {
 			if (default_output_format) {
-				/* output file is in session format, so we'll
-				 * keep a copy of everything as it comes in
-				 * and save from there after the session. */
 				outfile = NULL;
-				savebuf = g_byte_array_new();
 			} else {
 				/* saving to a file in whatever format was set
 				 * with --format, so all we need is a filehandle */
 				outfile = g_fopen(opt_output_file, "wb");
 			}
 		}
+		rcvd_samples_logic = rcvd_samples_analog = 0;
 
-		/* Prepare for logic data. */
-		logic_probelist = get_enabled_logic_probes(sdi);
-		/* How many bytes we need to store the packed samples. */
-		unitsize = (logic_probelist->len + 7) / 8;
+		if (sr_config_get(sdi->driver, sdi, NULL, SR_CONF_SAMPLERATE,
+				&gvar) == SR_OK) {
+			samplerate = g_variant_get_uint64(gvar);
+			g_variant_unref(gvar);
+		}
 
 #ifdef HAVE_SRD
-		GVariant *gvar;
-		if (opt_pds && logic_probelist->len) {
-			if (sr_config_get(sdi->driver, sdi, NULL, SR_CONF_SAMPLERATE,
-					&gvar) == SR_OK) {
-				samplerate = g_variant_get_uint64(gvar);
-				g_variant_unref(gvar);
+		if (opt_pds) {
+			if (samplerate) {
 				if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 						g_variant_new_uint64(samplerate)) != SRD_OK) {
 					g_critical("Failed to configure decode session.");
@@ -244,14 +213,14 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 		break;
 
 	case SR_DF_META:
-		g_debug("cli: received SR_DF_META");
+		g_debug("cli: Received SR_DF_META.");
 		meta = packet->payload;
 		for (l = meta->config; l; l = l->next) {
 			src = l->data;
 			switch (src->key) {
 			case SR_CONF_SAMPLERATE:
 				samplerate = g_variant_get_uint64(src->data);
-				g_debug("cli: got samplerate %"PRIu64" Hz", samplerate);
+				g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 #ifdef HAVE_SRD
 				if (opt_pds) {
 					if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
@@ -263,7 +232,7 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 				break;
 			case SR_CONF_SAMPLE_INTERVAL:
 				samplerate = g_variant_get_uint64(src->data);
-				g_debug("cli: got sample interval %"PRIu64" ms", samplerate);
+				g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 				break;
 			default:
 				/* Unknown metadata is not an error. */
@@ -273,17 +242,14 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 		break;
 
 	case SR_DF_TRIGGER:
-		g_debug("cli: received SR_DF_TRIGGER");
-		if (o->format->event)
-			o->format->event(o, SR_DF_TRIGGER, &output_buf,
-					 &output_len);
+		g_debug("cli: Received SR_DF_TRIGGER.");
 		triggered = 1;
 		break;
 
 	case SR_DF_LOGIC:
 		logic = packet->payload;
-		g_message("cli: received SR_DF_LOGIC, %"PRIu64" bytes", logic->length);
-		sample_size = logic->unitsize;
+		g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
+				logic->length, logic->unitsize);
 		if (logic->length == 0)
 			break;
 
@@ -291,152 +257,111 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 		if (opt_wait_trigger && !triggered)
 			break;
 
-		if (limit_samples && received_samples >= limit_samples)
+		if (limit_samples && rcvd_samples_logic >= limit_samples)
 			break;
 
-		ret = sr_filter_probes(sample_size, unitsize, logic_probelist,
-				logic->data, logic->length,
-				&filter_out, &filter_out_len);
-		if (ret != SR_OK)
-			break;
-
-		/*
-		 * What comes out of the filter is guaranteed to be packed into the
-		 * minimum size needed to support the number of samples at this sample
-		 * size. however, the driver may have submitted too much. Cut off
-		 * the buffer of the last packet according to the sample limit.
-		 */
-		if (limit_samples && (received_samples + logic->length / sample_size >
-				limit_samples * sample_size))
-			filter_out_len = limit_samples * sample_size - received_samples;
+		end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
+		/* Cut off last packet according to the sample limit. */
+		if (limit_samples && end_sample > limit_samples)
+			end_sample = limit_samples;
+		input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 
 		if (opt_output_file && default_output_format) {
 			/* Saving to a session file. */
-			g_byte_array_append(savebuf, filter_out, filter_out_len);
+			if (rcvd_samples_logic == 0) {
+				/* First packet with logic data, init session file. */
+				channels = g_malloc(sizeof(char *) * g_slist_length(sdi->channels));
+				for (i = 0, l = sdi->channels; l; l = l->next) {
+					ch = l->data;
+					if (ch->enabled && ch->type == SR_CHANNEL_LOGIC)
+						channels[i++] = ch->name;
+				}
+				channels[i] = NULL;
+				sr_session_save_init(session, opt_output_file,
+						samplerate, channels);
+				g_free(channels);
+			}
+			save_chunk_logic(session, logic->data, input_len, logic->unitsize);
 		} else {
 			if (opt_pds) {
 #ifdef HAVE_SRD
-				end_sample = received_samples + filter_out_len / unitsize;
-				if (srd_session_send(srd_sess, received_samples, end_sample,
-						(uint8_t*)filter_out, filter_out_len) != SRD_OK)
-					sr_session_stop();
+				if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
+						logic->data, input_len) != SRD_OK)
+					sr_session_stop(session);
 #endif
-			} else {
-				output_len = 0;
-				if (o->format->data && packet->type == o->format->df_type)
-					o->format->data(o, filter_out, filter_out_len,
-							&output_buf, &output_len);
-				if (output_len) {
-					fwrite(output_buf, 1, output_len, outfile);
-					fflush(outfile);
-					g_free(output_buf);
-				}
 			}
 		}
-		g_free(filter_out);
 
-		received_samples += logic->length / sample_size;
+		rcvd_samples_logic = end_sample;
 		break;
 
 	case SR_DF_ANALOG:
 		analog = packet->payload;
-		g_message("cli: received SR_DF_ANALOG, %d samples", analog->num_samples);
+		g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 		if (analog->num_samples == 0)
 			break;
 
-		if (limit_samples && received_samples >= limit_samples)
+		if (limit_samples && rcvd_samples_analog >= limit_samples)
 			break;
 
-		if (o->format->data && packet->type == o->format->df_type) {
-			o->format->data(o, (const uint8_t *)analog->data,
-					analog->num_samples * sizeof(float),
-					&output_buf, &output_len);
-			if (output_buf) {
-				fwrite(output_buf, 1, output_len, outfile);
-				fflush(outfile);
-				g_free(output_buf);
-			}
-		}
-
-		received_samples += analog->num_samples;
+		rcvd_samples_analog += analog->num_samples;
 		break;
 
 	case SR_DF_FRAME_BEGIN:
-		g_debug("cli: received SR_DF_FRAME_BEGIN");
-		if (o->format->event) {
-			o->format->event(o, SR_DF_FRAME_BEGIN, &output_buf,
-					 &output_len);
-			if (output_buf) {
-				fwrite(output_buf, 1, output_len, outfile);
-				fflush(outfile);
-				g_free(output_buf);
-			}
-		}
+		g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 		break;
 
 	case SR_DF_FRAME_END:
-		g_debug("cli: received SR_DF_FRAME_END");
-		if (o->format->event) {
-			o->format->event(o, SR_DF_FRAME_END, &output_buf,
-					 &output_len);
-			if (output_buf) {
-				fwrite(output_buf, 1, output_len, outfile);
-				fflush(outfile);
-				g_free(output_buf);
-			}
-		}
+		g_debug("cli: Received SR_DF_FRAME_END.");
 		break;
 
 	default:
 		break;
 	}
 
-	if (o && o->format->receive) {
-		if (o->format->receive(o, sdi, packet, &out) == SR_OK && out) {
-			fwrite(out->str, 1, out->len, outfile);
-			fflush(outfile);
-			g_string_free(out, TRUE);
+	if (o && outfile && !opt_pds) {
+		if (sr_output_send(o, packet, &out) == SR_OK) {
+			if (!out || (out->len == 0 && default_output_format
+					&& packet->type == SR_DF_ANALOG)) {
+				/* The user didn't specify an output module,
+				 * but needs to see this analog data. */
+				sr_output_send(oa, packet, &out);
+			}
+			if (out && out->len > 0) {
+				fwrite(out->str, 1, out->len, outfile);
+				fflush(outfile);
+			}
+			if (out)
+				g_string_free(out, TRUE);
 		}
 	}
 
 	/* SR_DF_END needs to be handled after the output module's receive()
-	 * is called, so it can properly clean up that module etc. */
+	 * is called, so it can properly clean up that module. */
 	if (packet->type == SR_DF_END) {
-		g_debug("cli: Received SR_DF_END");
-
-		if (o->format->event) {
-			o->format->event(o, SR_DF_END, &output_buf, &output_len);
-			if (output_buf) {
-				if (outfile)
-					fwrite(output_buf, 1, output_len, outfile);
-				g_free(output_buf);
-				output_len = 0;
-			}
-		}
-
-		if (limit_samples && received_samples < limit_samples)
-			g_warning("Device only sent %" PRIu64 " samples.",
-			       received_samples);
-
-		if (opt_continuous)
-			g_warning("Device stopped after %" PRIu64 " samples.",
-			       received_samples);
+		g_debug("cli: Received SR_DF_END.");
 
-		g_array_free(logic_probelist, TRUE);
-
-		if (o->format->cleanup)
-			o->format->cleanup(o);
-		g_free(o);
+		if (o)
+			sr_output_free(o);
 		o = NULL;
 
+		sr_output_free(oa);
+		oa = NULL;
+
 		if (outfile && outfile != stdout)
 			fclose(outfile);
 
-		if (opt_output_file && default_output_format && savebuf->len) {
-			if (sr_session_save(opt_output_file, sdi, savebuf->data,
-					unitsize, savebuf->len / unitsize) != SR_OK)
-				g_critical("Failed to save session.");
-			g_byte_array_free(savebuf, TRUE);
+		if (opt_output_file && default_output_format)
+			/* Flush whatever is left out to the session file. */
+			save_chunk_logic(session, NULL, 0, 0);
+
+		if (limit_samples) {
+			if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
+				g_warning("Device only sent %" PRIu64 " samples.",
+					   rcvd_samples_logic);
+			else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
+				g_warning("Device only sent %" PRIu64 " samples.",
+					   rcvd_samples_analog);
 		}
 	}
 
@@ -445,7 +370,7 @@ void datafeed_in(const struct sr_dev_inst *sdi,
 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 {
 	const struct sr_config_info *srci;
-	double tmp_double;
+	double tmp_double, dlow, dhigh;
 	uint64_t tmp_u64, p, q, low, high;
 	GVariant *rational[2], *range[2];
 	gboolean tmp_bool;
@@ -477,7 +402,7 @@ int opt_to_gvar(char *key, char *value, struct sr_config *src)
 			break;
 		src->data = g_variant_new_int32(tmp_u64);
 		break;
-	case SR_T_CHAR:
+	case SR_T_STRING:
 		src->data = g_variant_new_string(value);
 		break;
 	case SR_T_BOOL:
@@ -515,6 +440,16 @@ int opt_to_gvar(char *key, char *value, struct sr_config *src)
 			src->data = g_variant_new_tuple(range, 2);
 		}
 		break;
+	case SR_T_DOUBLE_RANGE:
+		if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
+			ret = -1;
+			break;
+		} else {
+			range[0] = g_variant_new_double(dlow);
+			range[1] = g_variant_new_double(dhigh);
+			src->data = g_variant_new_tuple(range, 2);
+		}
+		break;
 	default:
 		ret = -1;
 	}
@@ -525,7 +460,7 @@ int opt_to_gvar(char *key, char *value, struct sr_config *src)
 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 {
 	struct sr_config src;
-	struct sr_probe_group *pg;
+	struct sr_channel_group *cg;
 	GHashTableIter iter;
 	gpointer key, value;
 	int ret;
@@ -534,8 +469,8 @@ int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 	while (g_hash_table_iter_next(&iter, &key, &value)) {
 		if ((ret = opt_to_gvar(key, value, &src)) != 0)
 			return ret;
-		pg = select_probe_group(sdi);
-		ret = sr_config_set(sdi, pg, src.key, src.data);
+		cg = select_channel_group(sdi);
+		ret = sr_config_set(sdi, cg, src.key, src.data);
 		if (ret != SR_OK) {
 			g_critical("Failed to set device option '%s'.", (char *)key);
 			return ret;
@@ -550,9 +485,10 @@ void run_session(void)
 	GSList *devices;
 	GHashTable *devargs;
 	GVariant *gvar;
+	struct sr_session *session;
+	struct sr_trigger *trigger;
 	struct sr_dev_inst *sdi;
-	int max_probes, i;
-	char **triggerlist;
+	uint64_t min_samples, max_samples;
 
 	devices = device_scan();
 	if (!devices) {
@@ -561,21 +497,23 @@ void run_session(void)
 	}
 	if (g_slist_length(devices) > 1) {
 		g_critical("sigrok-cli only supports one device for capturing.");
+		g_slist_free(devices);
 		return;
 	}
 	sdi = devices->data;
+	g_slist_free(devices);
 
-	sr_session_new();
-	sr_session_datafeed_callback_add(datafeed_in, NULL);
+	sr_session_new(&session);
+	sr_session_datafeed_callback_add(session, datafeed_in, NULL);
 
 	if (sr_dev_open(sdi) != SR_OK) {
 		g_critical("Failed to open device.");
 		return;
 	}
 
-	if (sr_session_dev_add(sdi) != SR_OK) {
+	if (sr_session_dev_add(session, sdi) != SR_OK) {
 		g_critical("Failed to add device to session.");
-		sr_session_destroy();
+		sr_session_destroy(session);
 		return;
 	}
 
@@ -587,38 +525,34 @@ void run_session(void)
 		}
 	}
 
-	if (select_probes(sdi) != SR_OK) {
-		g_critical("Failed to set probes.");
-		sr_session_destroy();
+	if (select_channels(sdi) != SR_OK) {
+		g_critical("Failed to set channels.");
+		sr_session_destroy(session);
 		return;
 	}
 
 	if (opt_triggers) {
-		if (!(triggerlist = sr_parse_triggerstring(sdi, opt_triggers))) {
-			sr_session_destroy();
+		if (!parse_triggerstring(sdi, opt_triggers, &trigger)) {
+			sr_session_destroy(session);
 			return;
 		}
-		max_probes = g_slist_length(sdi->probes);
-		for (i = 0; i < max_probes; i++) {
-			if (triggerlist[i]) {
-				sr_dev_trigger_set(sdi, i, triggerlist[i]);
-				g_free(triggerlist[i]);
-			}
+		if (sr_session_trigger_set(session, trigger) != SR_OK) {
+			sr_session_destroy(session);
+			return;
 		}
-		g_free(triggerlist);
 	}
 
 	if (opt_continuous) {
 		if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
 			g_critical("This device does not support continuous sampling.");
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
 	}
 
 	if (opt_time) {
 		if (set_limit_time(sdi) != SR_OK) {
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
 	}
@@ -626,13 +560,28 @@ void run_session(void)
 	if (opt_samples) {
 		if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
 			g_critical("Invalid sample limit '%s'.", opt_samples);
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
+		if (sr_config_list(sdi->driver, sdi, NULL,
+				SR_CONF_LIMIT_SAMPLES, &gvar) == SR_OK) {
+			/* The device has no compression, or compression is turned
+			 * off, and publishes its sample memory size. */
+			g_variant_get(gvar, "(tt)", &min_samples, &max_samples);
+			g_variant_unref(gvar);
+			if (limit_samples < min_samples) {
+				g_critical("The device stores at least %"PRIu64
+						" samples with the current settings.", min_samples);
+			}
+			if (limit_samples > max_samples) {
+				g_critical("The device can store only %"PRIu64
+						" samples with the current settings.", max_samples);
+			}
+		}
 		gvar = g_variant_new_uint64(limit_samples);
 		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
 			g_critical("Failed to configure sample limit.");
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
 	}
@@ -640,34 +589,69 @@ void run_session(void)
 	if (opt_frames) {
 		if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
 			g_critical("Invalid sample limit '%s'.", opt_samples);
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
 		gvar = g_variant_new_uint64(limit_frames);
 		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
 			g_critical("Failed to configure frame limit.");
-			sr_session_destroy();
+			sr_session_destroy(session);
 			return;
 		}
 	}
 
-	if (sr_session_start() != SR_OK) {
+	if (sr_session_start(session) != SR_OK) {
 		g_critical("Failed to start session.");
-		sr_session_destroy();
+		sr_session_destroy(session);
 		return;
 	}
 
 	if (opt_continuous)
-		add_anykey();
+		add_anykey(session);
 
-	sr_session_run();
+	sr_session_run(session);
 
 	if (opt_continuous)
 		clear_anykey();
 
-	sr_session_datafeed_callback_remove_all();
-	sr_session_destroy();
-	g_slist_free(devices);
+	sr_session_datafeed_callback_remove_all(session);
+	sr_session_destroy(session);
 
 }
 
+void save_chunk_logic(struct sr_session *session, uint8_t *data,
+		uint64_t data_len, int unitsize)
+{
+	static uint8_t *buf = NULL;
+	static int buf_len = 0;
+	static int last_unitsize = 0;
+	int max;
+
+	if (!buf)
+		buf = g_malloc(SAVE_CHUNK_SIZE);
+
+	while (data_len > SAVE_CHUNK_SIZE) {
+		save_chunk_logic(session, data, SAVE_CHUNK_SIZE, unitsize);
+		data += SAVE_CHUNK_SIZE;
+		data_len -= SAVE_CHUNK_SIZE;
+	}
+
+	if (buf_len + data_len > SAVE_CHUNK_SIZE) {
+		max = (SAVE_CHUNK_SIZE - buf_len) / unitsize * unitsize;
+		memcpy(buf + buf_len, data, max);
+		sr_session_append(session, opt_output_file, buf, unitsize,
+				(buf_len + max) / unitsize);
+		memcpy(buf, data + max, data_len - max);
+		buf_len = data_len - max;
+	} else if (data_len == 0 && last_unitsize != 0) {
+		/* End of data, flush the buffer out. */
+		sr_session_append(session, opt_output_file, buf, last_unitsize,
+				buf_len / last_unitsize);
+	} else {
+		/* Buffer chunk. */
+		memcpy(buf + buf_len, data, data_len);
+		buf_len += data_len;
+	}
+	last_unitsize = unitsize;
+
+}