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Diffstat (limited to 'gr-dtv/lib/atsc/atsc_fs_checker_impl.cc')
-rw-r--r--gr-dtv/lib/atsc/atsc_fs_checker_impl.cc151
1 files changed, 72 insertions, 79 deletions
diff --git a/gr-dtv/lib/atsc/atsc_fs_checker_impl.cc b/gr-dtv/lib/atsc/atsc_fs_checker_impl.cc
index 3a39bc794b..6297650227 100644
--- a/gr-dtv/lib/atsc/atsc_fs_checker_impl.cc
+++ b/gr-dtv/lib/atsc/atsc_fs_checker_impl.cc
@@ -31,98 +31,91 @@
#include "gnuradio/dtv/atsc_consts.h"
#include <gnuradio/io_signature.h>
-static const int PN511_ERROR_LIMIT = 20; // max number of bits wrong
+static const int PN511_ERROR_LIMIT = 20; // max number of bits wrong
static const int PN63_ERROR_LIMIT = 5;
namespace gr {
- namespace dtv {
-
- atsc_fs_checker::sptr
- atsc_fs_checker::make()
- {
- return gnuradio::get_initial_sptr
- (new atsc_fs_checker_impl());
- }
-
- atsc_fs_checker_impl::atsc_fs_checker_impl()
- : gr::block("dtv_atsc_fs_checker",
- io_signature::make(1, 1, sizeof(atsc_soft_data_segment)),
- io_signature::make(1, 1, sizeof(atsc_soft_data_segment)))
- {
- reset();
- }
-
- void
- atsc_fs_checker_impl::reset()
- {
- d_index = 0;
- memset (d_sample_sr, 0, sizeof (d_sample_sr));
- memset (d_tag_sr, 0, sizeof (d_tag_sr));
- memset (d_bit_sr, 0, sizeof (d_bit_sr));
- d_field_num = 0;
- d_segment_num = 0;
- }
-
- atsc_fs_checker_impl::~atsc_fs_checker_impl()
- {
- }
-
- int
- atsc_fs_checker_impl::general_work(int noutput_items,
- gr_vector_int &ninput_items,
- gr_vector_const_void_star &input_items,
- gr_vector_void_star &output_items)
- {
- const atsc_soft_data_segment *in = (const atsc_soft_data_segment *) input_items[0];
- atsc_soft_data_segment *out = (atsc_soft_data_segment *) output_items[0];
-
- int output_produced = 0;
-
- for (int i = 0; i < noutput_items; i++) {
+namespace dtv {
+
+atsc_fs_checker::sptr atsc_fs_checker::make()
+{
+ return gnuradio::get_initial_sptr(new atsc_fs_checker_impl());
+}
+
+atsc_fs_checker_impl::atsc_fs_checker_impl()
+ : gr::block("dtv_atsc_fs_checker",
+ io_signature::make(1, 1, sizeof(atsc_soft_data_segment)),
+ io_signature::make(1, 1, sizeof(atsc_soft_data_segment)))
+{
+ reset();
+}
+
+void atsc_fs_checker_impl::reset()
+{
+ d_index = 0;
+ memset(d_sample_sr, 0, sizeof(d_sample_sr));
+ memset(d_tag_sr, 0, sizeof(d_tag_sr));
+ memset(d_bit_sr, 0, sizeof(d_bit_sr));
+ d_field_num = 0;
+ d_segment_num = 0;
+}
+
+atsc_fs_checker_impl::~atsc_fs_checker_impl() {}
+
+int atsc_fs_checker_impl::general_work(int noutput_items,
+ gr_vector_int& ninput_items,
+ gr_vector_const_void_star& input_items,
+ gr_vector_void_star& output_items)
+{
+ const atsc_soft_data_segment* in = (const atsc_soft_data_segment*)input_items[0];
+ atsc_soft_data_segment* out = (atsc_soft_data_segment*)output_items[0];
+
+ int output_produced = 0;
+
+ for (int i = 0; i < noutput_items; i++) {
// check for a hit on the PN 511 pattern
int errors = 0;
for (int j = 0; j < LENGTH_511 && errors < PN511_ERROR_LIMIT; j++)
- errors += (in[i].data[j + OFFSET_511] >= 0) ^ atsc_pn511[j];
+ errors += (in[i].data[j + OFFSET_511] >= 0) ^ atsc_pn511[j];
- //std::cout << errors << std::endl;
+ // std::cout << errors << std::endl;
if (errors < PN511_ERROR_LIMIT) { // 511 pattern is good.
- // determine if this is field 1 or field 2
- errors = 0;
- for (int j = 0; j < LENGTH_2ND_63; j++)
- errors += (in[i].data[j + OFFSET_2ND_63] >= 0) ^ atsc_pn63[j];
-
- // we should have either field 1 (== PN63) or field 2 (== ~PN63)
- if (errors <= PN63_ERROR_LIMIT) {
- //std::cout << "Found FIELD_SYNC_1" << std::endl;
- d_field_num = 1; // We are in field number 1 now
- d_segment_num = -1; // This is the first segment
- }
- else if (errors >= (LENGTH_2ND_63 - PN63_ERROR_LIMIT)) {
- //std::cout << "Found FIELD_SYNC_2" << std::endl;
- d_field_num = 2; // We are in field number 2 now
- d_segment_num = -1; // This is the first segment
- }
- else {
- // should be extremely rare.
- std::cerr << "!!! atsc_fs_checker: PN63 error count = " << errors << std::endl;
- }
+ // determine if this is field 1 or field 2
+ errors = 0;
+ for (int j = 0; j < LENGTH_2ND_63; j++)
+ errors += (in[i].data[j + OFFSET_2ND_63] >= 0) ^ atsc_pn63[j];
+
+ // we should have either field 1 (== PN63) or field 2 (== ~PN63)
+ if (errors <= PN63_ERROR_LIMIT) {
+ // std::cout << "Found FIELD_SYNC_1" << std::endl;
+ d_field_num = 1; // We are in field number 1 now
+ d_segment_num = -1; // This is the first segment
+ } else if (errors >= (LENGTH_2ND_63 - PN63_ERROR_LIMIT)) {
+ // std::cout << "Found FIELD_SYNC_2" << std::endl;
+ d_field_num = 2; // We are in field number 2 now
+ d_segment_num = -1; // This is the first segment
+ } else {
+ // should be extremely rare.
+ std::cerr << "!!! atsc_fs_checker: PN63 error count = " << errors
+ << std::endl;
+ }
}
- if( d_field_num == 1 || d_field_num == 2 ) { // If we have sync
- // So we copy out current packet data to an output packet and fill its plinfo
- for( int j = 0; j < ATSC_DATA_SEGMENT_LENGTH; j++ )
- out[output_produced].data[j] = in[i].data[j];
- out[output_produced].pli.set_regular_seg((d_field_num == 2), d_segment_num);
- d_segment_num++;
- output_produced++;
+ if (d_field_num == 1 || d_field_num == 2) { // If we have sync
+ // So we copy out current packet data to an output packet and fill its plinfo
+ for (int j = 0; j < ATSC_DATA_SEGMENT_LENGTH; j++)
+ out[output_produced].data[j] = in[i].data[j];
+ out[output_produced].pli.set_regular_seg((d_field_num == 2), d_segment_num);
+ d_segment_num++;
+ output_produced++;
}
- }
-
- consume_each(noutput_items);
- return output_produced;
}
- } /* namespace dtv */
+ consume_each(noutput_items);
+ return output_produced;
+}
+
+} /* namespace dtv */
} /* namespace gr */