std::future<std::wstring> call(const std::vector<std::wstring>& params) override
{
static const boost::wregex loop_exp(LR"(LOOP\s*(?<VALUE>\d?)?)", boost::regex::icase);
- static const boost::wregex seek_exp(LR"(SEEK\s+(?<VALUE>\d+))", boost::regex::icase);
+ static const boost::wregex seek_exp(LR"(SEEK\s+(?<VALUE>(\+|-)?\d+)(\s+(?<WHENCE>REL|END))?)", boost::regex::icase);
static const boost::wregex length_exp(LR"(LENGTH\s+(?<VALUE>\d+)?)", boost::regex::icase);
static const boost::wregex start_exp(LR"(START\\s+(?<VALUE>\\d+)?)", boost::regex::icase);
}
else if(boost::regex_match(param, what, seek_exp))
{
- auto value = what["VALUE"].str();
- input_.seek(boost::lexical_cast<uint32_t>(value));
+ auto value = boost::lexical_cast<uint32_t>(what["VALUE"].str());
+ auto whence = what["WHENCE"].str();
+
+ if(boost::iequals(whence, L"REL"))
+ {
+ value = file_frame_number() + value;
+ }
+ else if(boost::iequals(whence, L"END"))
+ {
+ value = file_nb_frames() - value;
+ }
+
+ input_.seek(value);
}
else if(boost::regex_match(param, what, length_exp))
{