input: Add sdi_ready flag to struct sr_input.

[libsigrok.git] / src / input / vcd.c

diff --git a/src/input/vcd.c b/src/input/vcd.c
index 8111c59cf757237149be9026100a4d6a0fa3c1c1..9d164f9884567e810ad4ff1c51dca2d110ff8562 100644 (file)
--- a/src/input/vcd.c
+++ b/src/input/vcd.c
@@ -70,6 +70,7 @@
 #define CHUNKSIZE 1024
 
 struct context {
+       gboolean started;
        gboolean got_header;
        uint64_t samplerate;
        unsigned int maxchannels;
@@ -256,7 +257,7 @@ static int format_match(GHashTable *metadata)
        g_free(name);
        g_free(contents);
 
-       return status;
+       return status ? SR_OK : SR_ERR;
 }
 
 /* Send N samples of the given value. */
@@ -408,8 +409,6 @@ static int init(struct sr_input *in, GHashTable *options)
        char name[16];
        struct context *inc;
 
-       inc = g_malloc0(sizeof(struct context));
-
        num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels"));
        if (num_channels < 1) {
                sr_err("Invalid value for numchannels: must be at least 1.");
@@ -419,6 +418,7 @@ static int init(struct sr_input *in, GHashTable *options)
                sr_err("No more than 64 channels supported.");
                return SR_ERR_ARG;
        }
+       inc = in->priv = g_malloc0(sizeof(struct context));
        inc->maxchannels = num_channels;
 
        inc->downsample = g_variant_get_int32(g_hash_table_lookup(options, "downsample"));
@@ -429,8 +429,7 @@ static int init(struct sr_input *in, GHashTable *options)
        inc->skip = g_variant_get_int32(g_hash_table_lookup(options, "skip"));
        inc->skip /= inc->downsample;
 
-       /* Create a virtual device. */
-       in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL);
+       in->sdi = sr_dev_inst_new(SR_ST_ACTIVE, NULL, NULL, NULL);
        in->priv = inc;
 
        for (i = 0; i < num_channels; i++) {
@@ -458,7 +457,7 @@ static gboolean have_header(GString *buf)
        return FALSE;
 }
 
-static int receive(const struct sr_input *in, GString *buf)
+static int receive(struct sr_input *in, GString *buf)
 {
        struct sr_datafeed_packet packet;
        struct sr_datafeed_meta meta;
@@ -467,13 +466,6 @@ static int receive(const struct sr_input *in, GString *buf)
        uint64_t samplerate;
        char *p;
 
-       if (buf->len == 0) {
-               /* End of stream. */
-               packet.type = SR_DF_END;
-               sr_session_send(in->sdi, &packet);
-               return SR_OK;
-       }
-
        g_string_append_len(in->buf, buf->str, buf->len);
 
        inc = in->priv;
@@ -484,6 +476,12 @@ static int receive(const struct sr_input *in, GString *buf)
                        /* There was a header in there, but it was malformed. */
                        return SR_ERR;
 
+               in->sdi_ready = TRUE;
+               /* sdi is ready, notify frontend. */
+               return SR_OK;
+       }
+
+       if (!inc->started) {
                std_session_send_df_header(in->sdi, LOG_PREFIX);
 
                packet.type = SR_DF_META;
@@ -493,6 +491,8 @@ static int receive(const struct sr_input *in, GString *buf)
                meta.config = g_slist_append(NULL, src);
                sr_session_send(in->sdi, &packet);
                sr_config_free(src);
+
+               inc->started = TRUE;
        }
 
        while ((p = g_strrstr_len(in->buf->str, in->buf->len, "\n"))) {
@@ -508,9 +508,16 @@ static int receive(const struct sr_input *in, GString *buf)
 
 static int cleanup(struct sr_input *in)
 {
+       struct sr_datafeed_packet packet;
        struct context *inc;
 
        inc = in->priv;
+       if (inc->started) {
+               /* End of stream. */
+               packet.type = SR_DF_END;
+               sr_session_send(in->sdi, &packet);
+       }
+
        g_slist_free_full(inc->channels, free_channel);
        g_free(inc);
        in->priv = NULL;
@@ -519,11 +526,11 @@ static int cleanup(struct sr_input *in)
 }
 
 static struct sr_option options[] = {
-       { "numchannels", "Max channels", "Maximum number of channels", NULL, NULL },
+       { "numchannels", "Number of channels", "Number of channels", NULL, NULL },
        { "skip", "Skip", "Skip until timestamp", NULL, NULL },
        { "downsample", "Downsample", "Divide samplerate by factor", NULL, NULL },
        { "compress", "Compress", "Compress idle periods longer than this value", NULL, NULL },
-       { 0 }
+       ALL_ZERO
 };
 
 static struct sr_option *get_options(void)