+ static ChannelRegex const regex[] = {
+ ChannelRegex(".*[\\._-]L[\\._-].*", 0),
+ ChannelRegex(".*[\\._-]R[\\._-].*", 1),
+ ChannelRegex(".*[\\._-]C[\\._-].*", 2),
+ ChannelRegex(".*[\\._-]Lfe[\\._-].*", 3),
+ ChannelRegex(".*[\\._-]LFE[\\._-].*", 3),
+ ChannelRegex(".*[\\._-]Lss[\\._-].*", 4),
+ ChannelRegex(".*[\\._-]Lsr[\\._-].*", 6),
+ ChannelRegex(".*[\\._-]Lrs[\\._-].*", 6),
+ ChannelRegex(".*[\\._-]Ls[\\._-].*", 4),
+ ChannelRegex(".*[\\._-]Rss[\\._-].*", 5),
+ ChannelRegex(".*[\\._-]Rsr[\\._-].*", 7),
+ ChannelRegex(".*[\\._-]Rrs[\\._-].*", 7),
+ ChannelRegex(".*[\\._-]Rs[\\._-].*", 5),
+ };
+
+ static int const regexes = sizeof(regex) / sizeof(*regex);
+
+ if (processor) {
+ processor->make_audio_mapping_default (*this);
+ } else {
+ make_zero ();
+ if (input_channels() == 1) {
+ bool guessed = false;
+
+ /* See if we can guess where this stream should go */
+ if (filename) {
+ for (int i = 0; i < regexes; ++i) {
+ boost::regex e (regex[i].regex, boost::regex::icase);
+ if (boost::regex_match(filename->filename().string(), e) && regex[i].channel < output_channels()) {
+ set (0, regex[i].channel, 1);
+ guessed = true;
+ }
+ }
+ }
+
+ if (!guessed) {
+ /* If we have no idea, just put it on centre */
+ set (0, static_cast<int>(dcp::Channel::CENTRE), 1);
+ }
+ } else {
+ /* 1:1 mapping */
+ for (int i = 0; i < min (input_channels(), output_channels()); ++i) {
+ set (i, i, 1);
+ }