-AudioMapping::AudioMapping (int c)
- : _source_channels (c)
-{
-
-}
-
-optional<libdcp::Channel>
-AudioMapping::source_to_dcp (int c) const
-{
- if (c >= _source_channels) {
- return optional<libdcp::Channel> ();
- }
-
- if (_source_channels == 1) {
- /* mono sources to centre */
- return libdcp::CENTRE;
- }
-
- return static_cast<libdcp::Channel> (c);
-}
-
-optional<int>
-AudioMapping::dcp_to_source (libdcp::Channel c) const
-{
- if (_source_channels == 1) {
- if (c == libdcp::CENTRE) {
- return 0;
- } else {
- return optional<int> ();
- }
- }
-
- if (static_cast<int> (c) >= _source_channels) {
- return optional<int> ();
- }
-
- return static_cast<int> (c);
-}
-
-int
-AudioMapping::dcp_channels () const
-{
- if (_source_channels == 1) {
- /* The source is mono, so to put the mono channel into
- the centre we need to generate a 5.1 soundtrack.
- */
- return 6;
- }
-
- return _source_channels;
-}
-