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output/bits: Support getting samplerate from meta packets.

This commit is contained in:
Bert Vermeulen 2014-04-28 14:54:47 -07:00
parent 7ea458625c
commit 35159a6b28
1 changed files with 49 additions and 23 deletions
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72
output/bits.c
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@ -32,10 +32,11 @@ struct context {
int samples_per_line;
int spl_cnt;
int trigger;
uint64_t samplerate;
int *channel_index;
char **channel_names;
gboolean header_done;
GString **lines;
GString *header;
};
static int init(struct sr_output *o)
@ -43,13 +44,10 @@ static int init(struct sr_output *o)
struct context *ctx;
struct sr_channel *ch;
GSList *l;
GVariant *gvar;
GHashTableIter iter;
gpointer key, value;
uint64_t samplerate;
unsigned int i, j;
int spl, num_channels;
char *samplerate_s;
int spl;
if (!o || !o->sdi)
return SR_ERR_ARG;
@ -99,27 +97,49 @@ static int init(struct sr_output *o)
j++;
}
ctx->header = g_string_sized_new(512);
g_string_printf(ctx->header, "%s\n", PACKAGE_STRING);
num_channels = g_slist_length(o->sdi->channels);
if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
&gvar) == SR_OK) {
samplerate = g_variant_get_uint64(gvar);
samplerate_s = sr_samplerate_string(samplerate);
g_string_append_printf(ctx->header, "Acquisition with %d/%d channels at %s\n",
ctx->num_enabled_channels, num_channels, samplerate_s);
g_free(samplerate_s);
g_variant_unref(gvar);
return SR_OK;
}
return SR_OK;
static GString *gen_header(struct sr_output *o)
{
struct context *ctx;
GVariant *gvar;
GString *header;
int num_channels;
char *samplerate_s;
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);
}
}
header = g_string_sized_new(512);
g_string_printf(header, "%s\n", PACKAGE_STRING);
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");
return header;
}
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;
struct context *ctx;
GSList *l;
int idx, offset;
uint64_t i, j;
gchar *p, c;
@ -131,14 +151,22 @@ static int receive(struct sr_output *o, const struct sr_datafeed_packet *packet,
return SR_ERR_ARG;
switch (packet->type) {
case 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);
}
break;
case SR_DF_TRIGGER:
ctx->trigger = ctx->spl_cnt;
break;
case SR_DF_LOGIC:
if (ctx->header) {
/* The header is still here, this must be the first packet. */
*out = ctx->header;
ctx->header = NULL;
if (!ctx->header_done) {
*out = gen_header(o);
ctx->header_done = TRUE;
} else
*out = g_string_sized_new(512);
@ -202,8 +230,6 @@ static int cleanup(struct sr_output *o)
for (i = 0; i < ctx->num_enabled_channels; i++)
g_string_free(ctx->lines[i], TRUE);
g_free(ctx->lines);
if (ctx->header)
g_string_free(ctx->header, TRUE);
g_free(ctx);
o->internal = NULL;