From fb9671bfc0f3d1e2fe81099e72ff0c09f07d9171 Mon Sep 17 00:00:00 2001
From: leo <leo@brix.(none)>
Date: Thu, 24 Apr 2008 02:25:11 +0100
Subject: initial

---
 gsm-tvoid/src/lib/gsm_burst_ff_single.cc | 118 +++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 gsm-tvoid/src/lib/gsm_burst_ff_single.cc

(limited to 'gsm-tvoid/src/lib/gsm_burst_ff_single.cc')

diff --git a/gsm-tvoid/src/lib/gsm_burst_ff_single.cc b/gsm-tvoid/src/lib/gsm_burst_ff_single.cc
new file mode 100644
index 0000000..ff6c354
--- /dev/null
+++ b/gsm-tvoid/src/lib/gsm_burst_ff_single.cc
@@ -0,0 +1,118 @@
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gsm_burst_ff.h>
+#include <gr_io_signature.h>
+#include <gr_math.h>
+#include <stdio.h>
+#include <gri_mmse_fir_interpolator_cc.h>
+
+gsm_burst_ff_sptr gsm_make_burst_ff (gr_feval_ll *t)
+{
+  return gsm_burst_ff_sptr (new gsm_burst_ff(t));
+}
+
+static const int MIN_IN = 1;	// minimum number of input streams
+static const int MAX_IN = 1;	// maximum number of input streams
+static const int MIN_OUT = 0;	// minimum number of output streams
+static const int MAX_OUT = 1;	// maximum number of output streams
+
+gsm_burst_ff::gsm_burst_ff (gr_feval_ll *t) : 
+	gsm_burst(t),
+	gr_block(	"burst_ff",
+				gr_make_io_signature (MIN_IN, MAX_IN, sizeof (float)),
+//				gr_make_io_signature (MIN_OUT, MAX_OUT, USEFUL_BITS * sizeof (float)))
+				gr_make_io_signature (0, 0, 0))
+//				gr_make_io_signature (MIN_OUT, MAX_OUT, sizeof (float)))
+{
+		
+	set_history(1); 
+	
+}
+
+gsm_burst_ff::~gsm_burst_ff ()
+{
+}
+
+/*
+void gsm_burst_ff::forecast (int noutput_items, gr_vector_int &ninput_items_required)
+{
+  unsigned ninputs = ninput_items_required.size ();
+  for (unsigned i = 0; i < ninputs; i++)
+    ninput_items_required[i] = noutput_items * BBUF_SIZE + history();
+}
+*/
+
+int gsm_burst_ff::general_work (int noutput_items,
+				   gr_vector_int &ninput_items,
+				   gr_vector_const_void_star &input_items,
+				   gr_vector_void_star &output_items)
+{
+	const float *in = (const float *) input_items[0];
+	float *out = (float *) output_items[0];
+	
+	int ii=0;
+	//int rval = 0;  //default to no output
+	int rval = noutput_items;  //default to no output
+
+	//int do_output = output_items.size() > 0 ? 1 : 0;
+	int do_output = 0;
+	
+	int n_input = ninput_items[0];
+//	fprintf(stderr,"out=%8.8x/#i=%d/#o=%d",(unsigned)out,n_input,noutput_items);
+//	fprintf(stderr,"#i=%d/#o=%d",n_input,noutput_items);
+
+//	while (( rval < noutput_items) && ( ii < n_input ) ) {
+	while ( ii < n_input ) {
+
+		assert(d_bbuf_pos <= BBUF_SIZE );
+		
+		if (d_bbuf_pos >= 0)	//could have been offset negative.  TODO: perhaps better just to add some slack to the buffer
+			d_burst_buffer[d_bbuf_pos] = in[ii];
+		
+		d_bbuf_pos++;
+		
+		if ( d_bbuf_pos >= BBUF_SIZE ) { 
+		
+			if (get_burst()) {
+				//found a burst, send to output
+				if (do_output) {
+					//ensure that output data is in range
+					int b = d_burst_start;
+					if (b < 0)
+						b = 0;
+					else if (b >= 2 * MAX_CORR_DIST)
+						b = 2 * MAX_CORR_DIST - 1;
+		
+					memcpy(out+rval*USEFUL_BITS, d_burst_buffer + b, USEFUL_BITS*sizeof(float));
+				}
+				//rval++;
+				//rval += USEFUL_BITS*sizeof(float);
+
+				switch ( d_clock_options & QB_MASK  ) {
+				case QB_QUARTER: //Can't do this in the FF version
+				case QB_FULL04:	//extra bit on timeslot 0 & 4
+					if (!(d_ts%4))
+						d_bbuf_pos--;
+					break;
+				case QB_NONE:	//don't adjust for quarter bits at all
+				default:
+					break;
+				}
+
+				d_last_burst_s_count = d_sample_count;	
+
+			}
+		}
+		d_sample_count++;
+ 		ii++;
+	}
+	
+//	fprintf(stderr,"/ii=%d/rval=%d\n",ii,rval);
+
+	consume_each (ii);
+	
+	return rval;
+}
-- 
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