Add mlt_profile_from_producer().

[mlt] / src / framework / mlt_profile.c

diff --git a/src/framework/mlt_profile.c b/src/framework/mlt_profile.c
index 04b04cc92744d0ee7de46e692eaa251c26f9322c..542a8f11b896984aabe4dbda80d6abed78ed7cec 100644 (file)
--- a/src/framework/mlt_profile.c
+++ b/src/framework/mlt_profile.c
@@ -21,9 +21,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#include "mlt_profile.h"
-#include "mlt_factory.h"
-#include "mlt_properties.h"
+#include "mlt.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -390,3 +388,59 @@ mlt_properties mlt_profile_list( )
 
        return properties;
 }
+
+/** Update the profile using the attributes of a producer.
+ *
+ * Use this to make an "auto-profile." Typically, you need to re-open the producer
+ * after you use this because some producers (e.g. avformat) adjust their framerate
+ * to that of the profile used when you created it.
+ * \public \memberof mlt_profile_s
+ * \param profile the profile to update
+ * \param producer the producer to inspect
+ */
+
+void mlt_profile_from_producer( mlt_profile profile, mlt_producer producer )
+{
+       mlt_frame fr = NULL;
+       uint8_t *buffer;
+       mlt_image_format fmt = mlt_image_yuv422;
+       mlt_properties p;
+       int w = profile->width;
+       int h = profile->height;
+
+       if ( ! mlt_service_get_frame( MLT_PRODUCER_SERVICE(producer), &fr, 0 ) && fr )
+       {
+               mlt_properties_set_double( MLT_FRAME_PROPERTIES( fr ), "consumer_aspect_ratio", mlt_profile_sar( profile ) );
+               if ( ! mlt_frame_get_image( fr, &buffer, &fmt, &w, &h, 0 ) )
+               {
+                       // Some source properties are not exposed until after the first get_image call.
+                       mlt_frame_close( fr );
+                       mlt_service_get_frame( MLT_PRODUCER_SERVICE(producer), &fr, 0 );
+                       p = MLT_FRAME_PROPERTIES( fr );
+//                     mlt_properties_dump(p, stderr);
+                       if ( mlt_properties_get_int( p, "meta.media.frame_rate_den" ) && mlt_properties_get_int( p, "meta.media.sample_aspect_den" ) )
+                       {
+                               profile->width = mlt_properties_get_int( p, "meta.media.width" );
+                               profile->height = mlt_properties_get_int( p, "meta.media.height" );
+                               profile->progressive = mlt_properties_get_int( p, "meta.media.progressive" );
+                               profile->frame_rate_num = mlt_properties_get_int( p, "meta.media.frame_rate_num" );
+                               profile->frame_rate_den = mlt_properties_get_int( p, "meta.media.frame_rate_den" );
+                               // AVCHD is mis-reported as double frame rate.
+                               if ( profile->progressive == 0 && (
+                                    profile->frame_rate_num / profile->frame_rate_den == 50 ||
+                                    profile->frame_rate_num / profile->frame_rate_den == 59 ) )
+                                       profile->frame_rate_num /= 2;
+                               profile->sample_aspect_num = mlt_properties_get_int( p, "meta.media.sample_aspect_num" );
+                               profile->sample_aspect_den = mlt_properties_get_int( p, "meta.media.sample_aspect_den" );
+                               profile->colorspace = mlt_properties_get_int( p, "meta.media.colorspace" );
+                               profile->display_aspect_num = (int) ( (double) profile->sample_aspect_num * profile->width / profile->sample_aspect_den + 0.5 );
+                               profile->display_aspect_den = profile->height;
+                               free( profile->description );
+                               profile->description = strdup( "automatic" );
+                               profile->is_explicit = 0;
+                       }
+               }
+       }
+       mlt_frame_close( fr );
+       mlt_producer_seek( producer, 0 );
+}