X-Git-Url: https://sigrok.org/gitweb/?p=sigrok-cli.git;a=blobdiff_plain;f=decode.c;h=4ddf34afbbaf00db414a041f4ef2e61ddc27bc0f;hp=0bf1d250bacb2063f5d28738a72083fd5db13b5c;hb=d4b0eec33f5f74723327305f5230ac258ba250b7;hpb=172d2b302de1d973dd15add0184e90d336c953bc

diff --git a/decode.c b/decode.c
index 0bf1d25..4ddf34a 100644
--- a/decode.c
+++ b/decode.c
@@ -29,6 +29,8 @@ static GHashTable *pd_meta_visible = NULL;
 static GHashTable *pd_binary_visible = NULL;
 static GHashTable *pd_channel_maps = NULL;
 
+uint64_t pd_samplerate = 0;
+
 extern struct srd_session *srd_sess;
 
 static int opts_to_gvar(struct srd_decoder *dec, GHashTable *hash,
@@ -137,7 +139,7 @@ static int register_pd(char *opt_pds, char *opt_pd_annotations)
 
 	pdtokens = g_strsplit(opt_pds, ",", 0);
 	for (pdtok = pdtokens; *pdtok; pdtok++) {
-		if (!(pd_opthash = parse_generic_arg(*pdtok, TRUE))) {
+		if (!(pd_opthash = parse_generic_arg(*pdtok, TRUE, NULL))) {
 			g_critical("Invalid protocol decoder option '%s'.", *pdtok);
 			break;
 		}
@@ -478,6 +480,147 @@ int setup_pd_binary(char *opt_pd_binary)
 	return 0;
 }
 
+/*
+ * Balance JSON object and array parentheses, and separate array items.
+ * Somewhat convoluted API to re-use the routine for individual items as
+ * well as the surrounding array and object, including deferred start of
+ * the output and late flush (and to keep the state strictly local to the
+ * routine). Some additional complexity due to JSON's inability to handle
+ * a trailing comma at the last item. Code phrased such that text literals
+ * are kept in their order of appearance in the output (where possible).
+ */
+static void jsontrace_open_close(gboolean is_close_req,
+	gboolean open_item, gboolean close_item)
+{
+	static gboolean is_file_open;
+	static gboolean is_item_open;
+
+	if (is_close_req && is_item_open)
+		close_item = TRUE;
+
+	/* Automatic file header, and array item separation. */
+	if (open_item) {
+		if (!is_file_open)
+			printf("{\"traceEvents\": [\n");
+		if (is_item_open) {
+			printf("}");
+			is_item_open = FALSE;
+		}
+		if (is_file_open) {
+			printf(",\n");
+		}
+		is_file_open = TRUE;
+	}
+
+	/* Array item open/append/close. */
+	if (open_item) {
+		printf("{");
+		is_item_open = TRUE;
+	}
+	if (!open_item && !close_item && !is_close_req) {
+		printf(", ");
+		is_item_open = TRUE;
+	}
+	if (close_item) {
+		printf("}");
+		is_item_open = FALSE;
+	}
+
+	/* Automatic file footer on shutdown. */
+	if (is_close_req && is_file_open) {
+		printf("\n");
+		printf("]}\n");
+	}
+	if (is_close_req)
+		is_file_open = FALSE;
+
+	/* Flush at end of lines, or end of file. */
+	if (close_item || is_close_req)
+		fflush(stdout);
+}
+
+/* Convert uint64 sample number to double timestamp in microseconds. */
+static double jsontrace_ts_usec(uint64_t snum)
+{
+	double ts_usec;
+
+	ts_usec = snum;
+	ts_usec *= 1e6;
+	ts_usec /= pd_samplerate;
+	return ts_usec;
+}
+
+/* Emit two Google Trace Events (JSON) for one PD annotation (ss, es). */
+static void jsontrace_annotation(struct srd_decoder *dec,
+	struct srd_proto_data_annotation *pda, struct srd_proto_data *pdata)
+{
+	char *row_text;
+	GSList *lrow, *lcls;
+	struct srd_decoder_annotation_row *row;
+	int cls;
+	char **ann_descr;
+
+	/*
+	 * Search for an annotation row for this index, or use the
+	 * annotation's descriptor.
+	 */
+	row_text = NULL;
+	if (dec->annotation_rows) {
+		for (lrow = dec->annotation_rows; lrow; lrow = lrow->next) {
+			row = lrow->data;
+			for (lcls = row->ann_classes; lcls; lcls = lcls->next) {
+				cls = GPOINTER_TO_INT(lcls->data);
+				if (cls == pda->ann_class) {
+					row_text = row->desc;
+					break;
+				}
+			}
+			if (row_text)
+				break;
+		}
+	}
+	if (!row_text) {
+		ann_descr = g_slist_nth_data(dec->annotations, pda->ann_class);
+		row_text = ann_descr[0];
+	}
+
+	/*
+	 * Emit two Google Trace Events for the start and end times.
+	 * Set the 'pid' (process ID) to the decoder name to group a
+	 * decoder's annotations. Set the 'tid' (thread ID) to the
+	 * annotation row's description. The 'ts' (timestamp) is in
+	 * microseconds. Set 'name' to the longest annotation text.
+	 *
+	 * BEWARE of the unfortunate JSON format limitation, which
+	 * clutters data output calls with format helper calls.
+	 * TODO Want to introduce a cJSON dependency to delegate the
+	 * construction of output text?
+	 */
+	jsontrace_open_close(FALSE, TRUE, FALSE);
+	printf("\"%s\": \"%s\"", "ph", "B");
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": %lf", "ts", jsontrace_ts_usec(pdata->start_sample));
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "pid", pdata->pdo->proto_id);
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "tid", row_text);
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "name", pda->ann_text[0]);
+
+	jsontrace_open_close(FALSE, TRUE, FALSE);
+	printf("\"%s\": \"%s\"", "ph", "E");
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": %lf", "ts", jsontrace_ts_usec(pdata->end_sample));
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "pid", pdata->pdo->proto_id);
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "tid", row_text);
+	jsontrace_open_close(FALSE, FALSE, FALSE);
+	printf("\"%s\": \"%s\"", "name", pda->ann_text[0]);
+
+	jsontrace_open_close(FALSE, FALSE, TRUE);
+}
+
 void show_pd_annotations(struct srd_proto_data *pdata, void *cb_data)
 {
 	struct srd_decoder *dec;
@@ -512,6 +655,12 @@ void show_pd_annotations(struct srd_proto_data *pdata, void *cb_data)
 	if (!show_ann)
 		return;
 
+	/* Google Trace Events are rather special. Use a separate code path. */
+	if (opt_pd_jsontrace) {
+		jsontrace_annotation(dec, pda, pdata);
+		return;
+	}
+
 	/*
 	 * Determine which fields of the annotation to display. Inspect
 	 * user specified options as well as the verbosity of the log level:
@@ -599,4 +748,16 @@ void show_pd_binary(struct srd_proto_data *pdata, void *cb_data)
 	fwrite(pdb->data, pdb->size, 1, stdout);
 	fflush(stdout);
 }
+
+void show_pd_prepare(void)
+{
+	if (opt_pd_jsontrace)
+		jsontrace_open_close(TRUE, FALSE, FALSE);
+}
+
+void show_pd_close(void)
+{
+	if (opt_pd_jsontrace)
+		jsontrace_open_close(TRUE, FALSE, FALSE);
+}
 #endif