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More array index out of bound protections for viterbi decoder

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This commit is contained in:
Javier 2015-06-12 16:10:59 +02:00
parent adf73e0610
commit d9da6e1e60
1 changed files with 24 additions and 5 deletions
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29
src/algorithms/telemetry_decoder/libs/viterbi_decoder.cc
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@ -578,12 +578,22 @@ int Viterbi_Decoder::Prev::get_anchestor_state_of_current_state(int current_stat
int Viterbi_Decoder::Prev::get_bit_of_current_state(int current_state)
{
//std::cout << "get prev bit : for state " << current_state << " at time " << t << ", the send bit is " << bit[current_state] << std::endl;
return bit[current_state];
if (num_states>current_state)
{
return bit[current_state];
}else{
return 0;
}
}
float Viterbi_Decoder::Prev::get_metric_of_current_state(int current_state)
{
return metric[current_state];
if (num_states>current_state)
{
return metric[current_state];
}else{
return 0;
}
}
int Viterbi_Decoder::Prev::get_t()
@ -593,15 +603,24 @@ int Viterbi_Decoder::Prev::get_t()
void Viterbi_Decoder::Prev::set_current_state_as_ancestor_of_next_state(int next_state, int current_state)
{
state[next_state] = current_state;
if (num_states>next_state)
{
state[next_state] = current_state;
}
}
void Viterbi_Decoder::Prev::set_decoded_bit_for_next_state(int next_state, int bit)
{
this->bit[next_state] = bit;
if (num_states>next_state)
{
this->bit[next_state] = bit;
}
}
void Viterbi_Decoder::Prev::set_survivor_branch_metric_of_next_state(int next_state, float metric)
{
this->metric[next_state] = metric;
if (num_states>next_state)
{
this->metric[next_state] = metric;
}
}