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-rw-r--r--gr-fec/lib/ldpc_bit_flip_decoder_impl.cc152
1 files changed, 67 insertions, 85 deletions
diff --git a/gr-fec/lib/ldpc_bit_flip_decoder_impl.cc b/gr-fec/lib/ldpc_bit_flip_decoder_impl.cc
index 9de4ff1ad9..286b7364f2 100644
--- a/gr-fec/lib/ldpc_bit_flip_decoder_impl.cc
+++ b/gr-fec/lib/ldpc_bit_flip_decoder_impl.cc
@@ -31,89 +31,71 @@
#include <vector>
namespace gr {
- namespace fec {
- namespace code {
-
- generic_decoder::sptr
- ldpc_bit_flip_decoder::make(const fec_mtrx_sptr mtrx_obj,
- unsigned int max_iter)
- {
- return generic_decoder::sptr
- (new ldpc_bit_flip_decoder_impl(mtrx_obj, max_iter));
- }
-
- ldpc_bit_flip_decoder_impl::ldpc_bit_flip_decoder_impl(const fec_mtrx_sptr mtrx_obj,
- unsigned int max_iter)
- : generic_decoder("ldpc_bit_flip_decoder")
- {
- // FEC matrix object to use for decoding
- d_mtrx = mtrx_obj;
-
- d_rate = static_cast<double>(d_mtrx->k())/static_cast<double>(d_mtrx->n());
-
- // Set frame size to k, the # of bits in the information word
- // All buffers and settings will be based on this value.
- set_frame_size(d_mtrx->k());
- // Maximum number of iterations in the decoding algorithm
- d_max_iterations = max_iter;
- }
-
- ldpc_bit_flip_decoder_impl::~ldpc_bit_flip_decoder_impl()
- {
- }
-
- int
- ldpc_bit_flip_decoder_impl::get_output_size()
- {
- return d_output_size;
- }
-
- int
- ldpc_bit_flip_decoder_impl::get_input_size()
- {
- return d_input_size;
- }
-
- bool
- ldpc_bit_flip_decoder_impl::set_frame_size(unsigned int frame_size)
- {
- if(frame_size % d_mtrx->k() != 0) {
- GR_LOG_ERROR(d_logger, boost::format("Frame size (%1% bits) must be a "
- "multiple of the information word "
- "size of the LDPC matrix, %2%") \
- % frame_size % (d_mtrx->k()));
- throw std::runtime_error("ldpc_bit_flip_decoder: cannot use frame size.");
- }
-
- d_output_size = frame_size;
- d_input_size = static_cast<int>(round(frame_size / d_rate));
-
- return true;
- }
-
- double
- ldpc_bit_flip_decoder_impl::rate()
- {
- return d_rate;
- }
-
-
- void
- ldpc_bit_flip_decoder_impl::generic_work(void *inbuffer,
- void *outbuffer)
- {
- // Populate the information word
- const float *in = (const float*)inbuffer;
- unsigned char *out = (unsigned char*) outbuffer;
-
- int j = 0;
- for(int i = 0; i < d_input_size; i+=d_mtrx->n()) {
- d_mtrx->decode(&out[j], &in[i], d_mtrx->k(), d_max_iterations);
- j += d_mtrx->k();
- }
-
- } /* ldpc_bit_flip_decoder_impl::generic_work() */
-
- } /* namespace code */
- } /* namespace fec */
+namespace fec {
+namespace code {
+
+generic_decoder::sptr ldpc_bit_flip_decoder::make(const fec_mtrx_sptr mtrx_obj,
+ unsigned int max_iter)
+{
+ return generic_decoder::sptr(new ldpc_bit_flip_decoder_impl(mtrx_obj, max_iter));
+}
+
+ldpc_bit_flip_decoder_impl::ldpc_bit_flip_decoder_impl(const fec_mtrx_sptr mtrx_obj,
+ unsigned int max_iter)
+ : generic_decoder("ldpc_bit_flip_decoder")
+{
+ // FEC matrix object to use for decoding
+ d_mtrx = mtrx_obj;
+
+ d_rate = static_cast<double>(d_mtrx->k()) / static_cast<double>(d_mtrx->n());
+
+ // Set frame size to k, the # of bits in the information word
+ // All buffers and settings will be based on this value.
+ set_frame_size(d_mtrx->k());
+ // Maximum number of iterations in the decoding algorithm
+ d_max_iterations = max_iter;
+}
+
+ldpc_bit_flip_decoder_impl::~ldpc_bit_flip_decoder_impl() {}
+
+int ldpc_bit_flip_decoder_impl::get_output_size() { return d_output_size; }
+
+int ldpc_bit_flip_decoder_impl::get_input_size() { return d_input_size; }
+
+bool ldpc_bit_flip_decoder_impl::set_frame_size(unsigned int frame_size)
+{
+ if (frame_size % d_mtrx->k() != 0) {
+ GR_LOG_ERROR(d_logger,
+ boost::format("Frame size (%1% bits) must be a "
+ "multiple of the information word "
+ "size of the LDPC matrix, %2%") %
+ frame_size % (d_mtrx->k()));
+ throw std::runtime_error("ldpc_bit_flip_decoder: cannot use frame size.");
+ }
+
+ d_output_size = frame_size;
+ d_input_size = static_cast<int>(round(frame_size / d_rate));
+
+ return true;
+}
+
+double ldpc_bit_flip_decoder_impl::rate() { return d_rate; }
+
+
+void ldpc_bit_flip_decoder_impl::generic_work(void* inbuffer, void* outbuffer)
+{
+ // Populate the information word
+ const float* in = (const float*)inbuffer;
+ unsigned char* out = (unsigned char*)outbuffer;
+
+ int j = 0;
+ for (int i = 0; i < d_input_size; i += d_mtrx->n()) {
+ d_mtrx->decode(&out[j], &in[i], d_mtrx->k(), d_max_iterations);
+ j += d_mtrx->k();
+ }
+
+} /* ldpc_bit_flip_decoder_impl::generic_work() */
+
+} /* namespace code */
+} /* namespace fec */
} /* namespace gr */