* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#define LOG_PREFIX "transform/scale"
struct context {
- double factor;
+ struct sr_rational factor;
};
static int init(struct sr_transform *t, GHashTable *options)
t->priv = ctx = g_malloc0(sizeof(struct context));
- ctx->factor = g_variant_get_double(g_hash_table_lookup(options, "factor"));
+ g_variant_get(g_hash_table_lookup(options, "factor"), "(xt)",
+ &ctx->factor.p, &ctx->factor.q);
return SR_OK;
}
{
struct context *ctx;
const struct sr_datafeed_analog *analog;
- struct sr_channel *ch;
- GSList *l;
- float *fdata;
- int i, num_channels, c;
if (!t || !t->sdi || !packet_in || !packet_out)
return SR_ERR_ARG;
switch (packet_in->type) {
case SR_DF_ANALOG:
analog = packet_in->payload;
- fdata = (float *)analog->data;
- num_channels = g_slist_length(analog->channels);
- for (i = 0; i < analog->num_samples; i++) {
- /* For now scale all values in all channels. */
- for (l = analog->channels, c = 0; l; l = l->next, c++) {
- ch = l->data;
- (void)ch;
- fdata[i * num_channels + c] *= ctx->factor;
- }
- }
+ analog->encoding->scale.p *= ctx->factor.p;
+ analog->encoding->scale.q *= ctx->factor.q;
break;
default:
sr_spew("Unsupported packet type %d, ignoring.", packet_in->type);
static const struct sr_option *get_options(void)
{
+ int64_t p = 1;
+ uint64_t q = 1;
+
/* Default to a scaling factor of 1.0. */
if (!options[0].def)
- options[0].def = g_variant_ref_sink(g_variant_new_double(1.0));
+ options[0].def = g_variant_ref_sink(g_variant_new("(xt)", &p, &q));
return options;
}