Pass sr_datafeed_packets and payloads with const pointers

[libsigrok.git] / output / analog.c

diff --git a/output/analog.c b/output/analog.c
index 776f29549074dcbae0a23188ef53ce92b40b28c7..d2f28b6b2853bf94d6bb2ad91eea4c750c688900 100644 (file)
--- a/output/analog.c
+++ b/output/analog.c
@@ -173,6 +173,9 @@ static void fancyprint(int unit, int mqflags, float value, GString *out)
                                 * a made-up notation. */
                                g_string_append(out, " %oA");
                        break;
+               case SR_UNIT_CONCENTRATION:
+                       g_string_append_printf(out, "%f ppm", value * 1000000);
+                       break;
                default:
                        si_printf(value, out, "");
        }
@@ -186,11 +189,11 @@ static void fancyprint(int unit, int mqflags, float value, GString *out)
 }
 
 static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
-               struct sr_datafeed_packet *packet)
+               const struct sr_datafeed_packet *packet)
 {
-       struct sr_datafeed_analog *analog;
+       const struct sr_datafeed_analog *analog;
        struct context *ctx;
-       float *fdata;
+       const float *fdata;
        int i, j;
 
        (void)sdi;
@@ -211,7 +214,7 @@ static GString *receive(struct sr_output *o, const struct sr_dev_inst *sdi,
                break;
        case SR_DF_ANALOG:
                analog = packet->payload;
-               fdata = (float *)analog->data;
+               fdata = (const float *)analog->data;
                for (i = 0; i < analog->num_samples; i++) {
                        for (j = 0; j < ctx->num_enabled_probes; j++) {
                                g_string_append_printf(ctx->out, "%s: ",