Present fixed formats with video content and variable formats with stills.

[dcpomatic.git] / src / lib / film_state.cc

diff --git a/src/lib/film_state.cc b/src/lib/film_state.cc
index 739eeac3c7a89dc9a1b05f55c870ff11ce33254f..3cd7091ca69ebdb62a8706c652dc7113d63f8779 100644 (file)
--- a/src/lib/film_state.cc
+++ b/src/lib/film_state.cc
@@ -35,6 +35,7 @@
 #include "format.h"
 #include "dcp_content_type.h"
 #include "util.h"
+#include "exceptions.h"
 
 using namespace std;
 using namespace boost;
@@ -251,10 +252,13 @@ ContentType
 FilmState::content_type () const
 {
 #if BOOST_FILESYSTEM_VERSION == 3
-       string const ext = filesystem::path(content).extension().string();
+       string ext = filesystem::path(content).extension().string();
 #else
-       string const ext = filesystem::path(content).extension();
+       string ext = filesystem::path(content).extension();
 #endif
+
+       transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
+       
        if (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png") {
                return STILL;
        }
@@ -275,3 +279,35 @@ FilmState::bytes_per_sample () const
 
        return 0;
 }
+
+int
+FilmState::target_sample_rate () const
+{
+       double t = dcp_audio_sample_rate (audio_sample_rate);
+       if (rint (frames_per_second) != frames_per_second) {
+               if (fabs (frames_per_second - 23.976) < 1e-6 || (fabs (frames_per_second - 29.97) < 1e-6)) {
+                       /* 24fps or 30fps drop-frame ie {24,30} * 1000 / 1001 frames per second;
+                          hence we need to resample the audio to dcp_audio_sample_rate * 1000 / 1001
+                          so that when we play it back at dcp_audio_sample_rate it is sped up
+                          by the same amount that the video is
+                       */
+                       t *= double(1000) / 1001;
+               } else {
+                       throw EncodeError ("unknown fractional frame rate");
+               }
+       }
+
+       return rint (t);
+}
+
+int
+FilmState::dcp_length () const
+{
+       if (dcp_frames) {
+               return dcp_frames;
+       }
+
+       return length;
+}
+
+