-/** Change the gains of the supplied AudioMapping to make it a default
- * for this film. The defaults are guessed based on what processor (if any)
- * is in use, the number of input channels and any filename supplied.
- */
-void
-Film::make_audio_mapping_default (AudioMapping& mapping, optional<boost::filesystem::path> filename) const
-{
- static string const regex[] = {
- ".*[\\._-]L[\\._-].*",
- ".*[\\._-]R[\\._-].*",
- ".*[\\._-]C[\\._-].*",
- ".*[\\._-]Lfe[\\._-].*",
- ".*[\\._-]Ls[\\._-].*",
- ".*[\\._-]Rs[\\._-].*"
- };
-
- static int const regexes = sizeof(regex) / sizeof(*regex);
-
- if (audio_processor ()) {
- audio_processor()->make_audio_mapping_default (mapping);
- } else {
- mapping.make_zero ();
- if (mapping.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], boost::regex::icase);
- if (boost::regex_match (filename->string(), e) && i < mapping.output_channels()) {
- mapping.set (0, i, 1);
- guessed = true;
- }
- }
- }
-
- if (!guessed) {
- /* If we have no idea, just put it on centre */
- mapping.set (0, static_cast<int> (dcp::CENTRE), 1);
- }
- } else {
- /* 1:1 mapping */
- for (int i = 0; i < min (mapping.input_channels(), mapping.output_channels()); ++i) {
- mapping.set (i, i, 1);
- }
- }
- }
-}
-