*
* skip: Allows skipping until given timestamp in the file.
* This can speed up analyzing of long captures.
- *
+ *
* Value < 0: Skip until first timestamp listed in
* the file. (default)
*
#define LOG_PREFIX "input/vcd"
-#define DEFAULT_NUM_CHANNELS 8
#define CHUNKSIZE (1024 * 1024)
struct context {
gboolean started;
gboolean got_header;
+ uint64_t prev_timestamp;
uint64_t samplerate;
unsigned int maxchannels;
unsigned int channelcount;
/*
* Reads a single VCD section from input file and parses it to name/contents.
- * e.g. $timescale 1ps $end => "timescale" "1ps"
+ * e.g. $timescale 1ps $end => "timescale" "1ps"
*/
static gboolean parse_section(GString *buf, gchar **name, gchar **contents)
{
status = FALSE;
pos = 0;
+ /* Skip UTF8 BOM */
+ if (buf->len >= 3 && !strncmp(buf->str, "\xef\xbb\xbf", 3))
+ pos = 3;
+
/* Skip any initial white-space. */
while (pos < buf->len && g_ascii_isspace(buf->str[pos]))
pos++;
sr_info("Unsupported signal type: '%s'", parts[0]);
else if (strtol(parts[1], NULL, 10) != 1)
sr_info("Unsupported signal size: '%s'", parts[1]);
- else if (inc->channelcount >= inc->maxchannels)
+ else if (inc->maxchannels && inc->channelcount >= inc->maxchannels)
sr_warn("Skipping '%s%s' because only %d channels requested.",
parts[3], parts[4] ? : "", inc->maxchannels);
else {
static void parse_contents(const struct sr_input *in, char *data)
{
struct context *inc;
- uint64_t timestamp, prev_timestamp;
+ uint64_t timestamp;
unsigned int bit, i;
char **tokens;
inc = in->priv;
- prev_timestamp = 0;
/* Read one space-delimited token at a time. */
tokens = g_strsplit_set(data, " \t\r\n", 0);
*/
if (inc->skip < 0) {
inc->skip = timestamp;
- prev_timestamp = timestamp;
+ inc->prev_timestamp = timestamp;
} else if (inc->skip > 0 && timestamp < (uint64_t)inc->skip) {
- prev_timestamp = inc->skip;
- } else if (timestamp == prev_timestamp) {
+ inc->prev_timestamp = inc->skip;
+ } else if (timestamp == inc->prev_timestamp) {
/* Ignore repeated timestamps (e.g. sigrok outputs these) */
} else {
- if (inc->compress != 0 && timestamp - prev_timestamp > inc->compress) {
+ if (inc->compress != 0 && timestamp - inc->prev_timestamp > inc->compress) {
/* Compress long idle periods */
- prev_timestamp = timestamp - inc->compress;
+ inc->prev_timestamp = timestamp - inc->compress;
}
sr_dbg("New timestamp: %" PRIu64, timestamp);
/* Generate samples from prev_timestamp up to timestamp - 1. */
- add_samples(in, timestamp - prev_timestamp);
- prev_timestamp = timestamp;
+ add_samples(in, timestamp - inc->prev_timestamp);
+ inc->prev_timestamp = timestamp;
}
} else if (tokens[i][0] == '$' && tokens[i][1] != '\0') {
/*
static int init(struct sr_input *in, GHashTable *options)
{
struct context *inc;
- int num_channels;
- 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.");
- return SR_ERR_ARG;
- }
inc = in->priv = g_malloc0(sizeof(struct context));
- inc->maxchannels = num_channels;
+ inc->maxchannels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels"));
inc->downsample = g_variant_get_int32(g_hash_table_lookup(options, "downsample"));
if (inc->downsample < 1)
inc->downsample = 1;
inc = in->priv;
if (!inc->started) {
- std_session_send_df_header(in->sdi, LOG_PREFIX);
+ std_session_send_df_header(in->sdi);
packet.type = SR_DF_META;
packet.payload = &meta;
static int end(struct sr_input *in)
{
- struct sr_datafeed_packet packet;
struct context *inc;
int ret;
/* Send any samples that haven't been sent yet. */
send_buffer(in);
- if (inc->started) {
- packet.type = SR_DF_END;
- sr_session_send(in->sdi, &packet);
- }
+ if (inc->started)
+ std_session_send_df_end(in->sdi);
return ret;
}
inc->current_levels = NULL;
}
+static int reset(struct sr_input *in)
+{
+ struct context *inc = in->priv;
+
+ cleanup(in);
+ inc->started = FALSE;
+ g_string_truncate(in->buf, 0);
+
+ return SR_OK;
+}
+
static struct sr_option options[] = {
{ "numchannels", "Number of channels", "Number of channels", NULL, NULL },
{ "skip", "Skip", "Skip until timestamp", NULL, NULL },
static const struct sr_option *get_options(void)
{
if (!options[0].def) {
- options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS));
+ options[0].def = g_variant_ref_sink(g_variant_new_int32(0));
options[1].def = g_variant_ref_sink(g_variant_new_int32(-1));
options[2].def = g_variant_ref_sink(g_variant_new_int32(1));
options[3].def = g_variant_ref_sink(g_variant_new_int32(0));
.receive = receive,
.end = end,
.cleanup = cleanup,
+ .reset = reset,
};