struct context {
unsigned int num_enabled_channels;
- unsigned int unitsize;
- char *header;
- uint8_t *old_sample;
+ uint64_t samplerate;
+ uint64_t samplecount;
+ gboolean header_done;
+ uint8_t *prevsample;
+ int *channel_index;
};
static const char *gnuplot_header = "\
-# Sample data in space-separated columns format usable by gnuplot\n\
-#\n\
-# Generated by: %s on %s%s\
-# Period: %s\n\
-#\n\
-# Column\tChannel\n\
-# -------------------------------------\
-----------------------------------------\n\
-# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
-
-static const char *gnuplot_header_comment = "\
-# Comment: Acquisition with %d/%d channels at %s\n";
+# Sample data in space-separated columns format usable by gnuplot.\n";
+static const char *gnuplot_header2 = "\
+#\n# Column\tChannel\n\
+# -----------------------------------------------------------------------------\n\
+# 0\t\tSample counter (for internal gnuplot purposes)\n";
+
static int init(struct sr_output *o)
{
struct context *ctx;
struct sr_channel *ch;
GSList *l;
- GVariant *gvar;
- uint64_t samplerate;
unsigned int i;
- int num_channels;
- char *c, *frequency_s;
- char wbuf[1000], comment[128];
- time_t t;
- if (!o) {
- sr_err("%s: o was NULL", __func__);
+ if (!o || !o->sdi)
return SR_ERR_ARG;
- }
-
- if (!o->sdi) {
- sr_err("%s: o->sdi was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
- sr_err("%s: ctx malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
+ ctx = g_malloc0(sizeof(struct context));
o->internal = ctx;
ctx->num_enabled_channels = 0;
for (l = o->sdi->channels; l; l = l->next) {
ch = l->data;
- if (ch->type != SR_PROBE_LOGIC)
+ if (ch->type != SR_CHANNEL_LOGIC)
continue;
if (!ch->enabled)
continue;
ctx->num_enabled_channels++;
}
if (ctx->num_enabled_channels <= 0) {
- sr_err("%s: no logic channel enabled", __func__);
+ sr_err("No logic channel enabled.");
return SR_ERR;
}
+ ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels);
- ctx->unitsize = (ctx->num_enabled_channels + 7) / 8;
-
- num_channels = g_slist_length(o->sdi->channels);
- comment[0] = '\0';
- samplerate = 0;
- if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
- &gvar) == SR_OK) {
- samplerate = g_variant_get_uint64(gvar);
- g_variant_unref(gvar);
- if (!(frequency_s = sr_samplerate_string(samplerate))) {
- sr_err("%s: sr_samplerate_string failed", __func__);
- g_free(ctx);
- return SR_ERR;
- }
- snprintf(comment, 127, gnuplot_header_comment,
- ctx->num_enabled_channels, num_channels, frequency_s);
- g_free(frequency_s);
- }
-
- /* Columns / channels */
- wbuf[0] = '\0';
- for (i = 0, l = o->sdi->channels; l; l = l->next, i++) {
+ /* Once more to map the enabled channels. */
+ for (i = 0, l = o->sdi->channels; l; l = l->next) {
ch = l->data;
- if (ch->type != SR_PROBE_LOGIC)
+ if (ch->type != SR_CHANNEL_LOGIC)
continue;
if (!ch->enabled)
continue;
- c = (char *)&wbuf + strlen((const char *)&wbuf);
- sprintf(c, "# %d\t\t%s\n", i + 1, ch->name);
+ ctx->channel_index[i++] = ch->index;
}
- if (!(frequency_s = sr_period_string(samplerate))) {
- sr_err("%s: sr_period_string failed", __func__);
- g_free(ctx);
- return SR_ERR;
- }
-
- t = time(NULL);
- ctx->header = g_strdup_printf(gnuplot_header, PACKAGE_STRING,
- ctime(&t), comment, frequency_s, (char *)&wbuf);
- g_free(frequency_s);
-
- if (!(ctx->old_sample = g_try_malloc0(ctx->unitsize))) {
- sr_err("%s: ctx->old_sample malloc failed", __func__);
- g_free(ctx->header);
- g_free(ctx);
- return SR_ERR_MALLOC;
- }
-
- return 0;
+ return SR_OK;
}
-static int event(struct sr_output *o, int event_type, uint8_t **data_out,
- uint64_t *length_out)
+static GString *gen_header(struct sr_output *o)
{
- if (!o) {
- sr_err("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
+ struct context *ctx;
+ struct sr_channel *ch;
+ GVariant *gvar;
+ GString *header;
+ time_t t;
+ unsigned int num_channels, i;
+ char *samplerate_s;
- if (!data_out) {
- sr_err("%s: data_out was NULL", __func__);
- return SR_ERR_ARG;
+ ctx = o->internal;
+ if (ctx->samplerate == 0) {
+ if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
+ &gvar) == SR_OK) {
+ ctx->samplerate = g_variant_get_uint64(gvar);
+ g_variant_unref(gvar);
+ }
}
- if (!length_out) {
- sr_err("%s: length_out was NULL", __func__);
- return SR_ERR_ARG;
- }
+ t = time(NULL);
+ header = g_string_sized_new(512);
+ g_string_printf(header, "%s", gnuplot_header);
+ g_string_append_printf(header, "# Generated by %s on %s",
+ PACKAGE_STRING, ctime(&t));
- switch (event_type) {
- case SR_DF_TRIGGER:
- /* TODO: Can a trigger mark be in a gnuplot data file? */
- break;
- case SR_DF_END:
- g_free(o->internal);
- o->internal = NULL;
- break;
- default:
- sr_err("%s: unsupported event type: %d", __func__, event_type);
- break;
+ num_channels = g_slist_length(o->sdi->channels);
+ g_string_append_printf(header, "# Acquisition with %d/%d channels",
+ ctx->num_enabled_channels, num_channels);
+ if (ctx->samplerate != 0) {
+ samplerate_s = sr_samplerate_string(ctx->samplerate);
+ g_string_append_printf(header, " at %s", samplerate_s);
+ g_free(samplerate_s);
}
+ g_string_append_printf(header, "\n");
- *data_out = NULL;
- *length_out = 0;
+ g_string_append_printf(header, "%s", gnuplot_header2);
- return SR_OK;
+ /* Columns / channels */
+ for (i = 0; i < ctx->num_enabled_channels; i++) {
+ ch = g_slist_nth_data(o->sdi->channels, ctx->channel_index[i]);
+ g_string_append_printf(header, "# %d\t\t%s\n", i + 1, ch->name);
+ }
+
+ return header;
}
-static int data(struct sr_output *o, const uint8_t *data_in,
- uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
+static int receive(struct sr_output *o, const struct sr_datafeed_packet *packet,
+ GString **out)
{
+ const struct sr_datafeed_meta *meta;
+ const struct sr_datafeed_logic *logic;
+ const struct sr_config *src;
+ GSList *l;
struct context *ctx;
- unsigned int max_linelen, outsize, p, curbit, i;
const uint8_t *sample;
- static uint64_t samplecount = 0;
- uint8_t *outbuf, *c;
+ unsigned int curbit, p, idx, i;
- if (!o) {
- sr_err("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!o->internal) {
- sr_err("%s: o->internal was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!data_in) {
- sr_err("%s: data_in was NULL", __func__);
- return SR_ERR_ARG;
- }
+ *out = NULL;
+ if (!o || !o->internal)
+ return SR_ERR_BUG;
+ ctx = o->internal;
- if (!data_out) {
- sr_err("%s: data_out was NULL", __func__);
- return SR_ERR_ARG;
+ if (packet->type == SR_DF_META) {
+ meta = packet->payload;
+ for (l = meta->config; l; l = l->next) {
+ src = l->data;
+ if (src->key != SR_CONF_SAMPLERATE)
+ continue;
+ ctx->samplerate = g_variant_get_uint64(src->data);
+ }
}
- if (!length_out) {
- sr_err("%s: length_out was NULL", __func__);
- return SR_ERR_ARG;
- }
+ if (packet->type != SR_DF_LOGIC)
+ return SR_OK;
+ logic = packet->payload;
- ctx = o->internal;
- max_linelen = 16 + ctx->num_enabled_channels * 2;
- outsize = length_in / ctx->unitsize * max_linelen;
- if (ctx->header)
- outsize += strlen(ctx->header);
-
- if (!(outbuf = g_try_malloc0(outsize))) {
- sr_err("%s: outbuf malloc failed", __func__);
- return SR_ERR_MALLOC;
+ if (!ctx->prevsample) {
+ /* Can't allocate this until we know the stream's unitsize. */
+ ctx->prevsample = g_malloc0(logic->unitsize);
}
- outbuf[0] = '\0';
- if (ctx->header) {
- /* The header is still here, this must be the first packet. */
- strncpy((char *)outbuf, ctx->header, outsize);
- g_free(ctx->header);
- ctx->header = NULL;
+ if (!ctx->header_done) {
+ *out = gen_header(o);
+ ctx->header_done = TRUE;
+ } else {
+ *out = g_string_sized_new(512);
}
- for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
-
- sample = data_in + i;
+ for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
+ sample = logic->data + i;
+ ctx->samplecount++;
/*
- * Don't output the same samples multiple times. However, make
+ * Don't output the same sample multiple times, but make
* sure to output at least the first and last sample.
*/
- if (samplecount++ != 0 &&
- !memcmp(sample, ctx->old_sample, ctx->unitsize)) {
- if (i != (length_in - ctx->unitsize))
+ if (i > 0 && i < logic->length - logic->unitsize) {
+ if (!memcmp(sample, ctx->prevsample, logic->unitsize))
continue;
}
- memcpy(ctx->old_sample, sample, ctx->unitsize);
+ memcpy(ctx->prevsample, sample, logic->unitsize);
/* The first column is a counter (needed for gnuplot). */
- c = outbuf + strlen((const char *)outbuf);
- sprintf((char *)c, "%" PRIu64 "\t", samplecount++);
+ g_string_append_printf(*out, "%" PRIu64 "\t", ctx->samplecount);
/* The next columns are the values of all channels. */
for (p = 0; p < ctx->num_enabled_channels; p++) {
- curbit = (sample[p / 8] & ((uint8_t) (1 << (p % 8)))) >> (p % 8);
- c = outbuf + strlen((const char *)outbuf);
- sprintf((char *)c, "%d ", curbit);
+ idx = ctx->channel_index[p];
+ curbit = (sample[idx / 8] & ((uint8_t) (1 << (idx % 8)))) >> (idx % 8);
+ g_string_append_printf(*out, "%d ", curbit);
}
-
- c = outbuf + strlen((const char *)outbuf);
- sprintf((char *)c, "\n");
+ g_string_append_printf(*out, "\n");
}
- *data_out = outbuf;
- *length_out = strlen((const char *)outbuf);
+ return SR_OK;
+}
+
+static int cleanup(struct sr_output *o)
+{
+ struct context *ctx;
+
+ if (!o || !o->internal)
+ return SR_ERR_BUG;
+ ctx = o->internal;
+ g_free(ctx->channel_index);
+ g_free(ctx->prevsample);
+ g_free(ctx);
return SR_OK;
}
SR_PRIV struct sr_output_format output_gnuplot = {
.id = "gnuplot",
.description = "Gnuplot",
- .df_type = SR_DF_LOGIC,
.init = init,
- .data = data,
- .event = event,
+ .receive = receive,
+ .cleanup = cleanup,
};