Various minor whitespace fixes.

[libsigrok.git] / src / output / wav.c

diff --git a/src/output/wav.c b/src/output/wav.c
index 8aa787bd3f14e36f67fc7a58e870b20c98762fc2..e9c7d6fd1a70bee549121c7ac1872619532e377d 100644 (file)
--- a/src/output/wav.c
+++ b/src/output/wav.c
@@ -27,6 +27,7 @@
 #define MIN_DATA_CHUNK_SAMPLES 10
 
 struct out_context {
+       double scale;
        gboolean header_done;
        uint64_t samplerate;
        int num_channels;
@@ -91,10 +92,9 @@ static int init(struct sr_output *o, GHashTable *options)
        struct sr_channel *ch;
        GSList *l;
 
-       (void)options;
-
        outc = g_malloc0(sizeof(struct out_context));
        o->priv = outc;
+       outc->scale = g_variant_get_double(g_hash_table_lookup(options, "scale"));
 
        for (l = o->sdi->channels; l; l = l->next) {
                ch = l->data;
@@ -229,6 +229,7 @@ static int check_chanbuf_size(const struct sr_output *o)
 
        return size;
 }
+
 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
                GString **out)
 {
@@ -238,6 +239,7 @@ static int receive(const struct sr_output *o, const struct sr_datafeed_packet *p
        const struct sr_config *src;
        struct sr_channel *ch;
        GSList *l;
+       float f;
        int num_channels, size, *chan_idx, idx, i, j;
        uint8_t *buf;
 
@@ -289,7 +291,10 @@ static int receive(const struct sr_output *o, const struct sr_datafeed_packet *p
                        for (j = 0; j < num_channels; j++) {
                                idx = chan_idx[j];
                                buf = outc->chanbuf[idx] + outc->chanbuf_used[idx]++ * 4;
-                               float_to_le(buf, analog->data[i * num_channels + j]);
+                               f = analog->data[i * num_channels + j];
+                               if (outc->scale != 0.0)
+                                       f /= outc->scale;
+                               float_to_le(buf, f);
                        }
                }
                g_free(chan_idx);
@@ -329,12 +334,26 @@ static int cleanup(struct sr_output *o)
        return SR_OK;
 }
 
+static struct sr_option options[] = {
+       { "scale", "Scale", "Scale values by factor", NULL, NULL },
+       ALL_ZERO
+};
+
+static const struct sr_option *get_options(void)
+{
+       if (!options[0].def)
+               options[0].def = g_variant_ref_sink(g_variant_new_double(0.0));
+
+       return options;
+}
+
 SR_PRIV struct sr_output_module output_wav = {
        .id = "wav",
        .name = "WAV",
-       .desc = "WAVE file format",
+       .desc = "Microsoft WAV file format",
+       .exts = (const char*[]){"wav", NULL},
+       .options = get_options,
        .init = init,
        .receive = receive,
        .cleanup = cleanup,
 };
-