enable scene detection, update man page, add commandline parameter -S/--scene-detection. automatically creates new samples from video files loaded at startup.

veejay-current/veejay-server/libel/vj-el.c

@@ -1374,6 +1374,49 @@ void	vj_el_scan_video_file( char *filename,  int *dw, int *dh, float *dfps, long
 }
 
 
+int	vj_el_auto_detect_scenes( editlist *el, uint8_t *tmp[4], int w, int h, int dl_threshold )
+{
+	long n1 = 0;
+	long n2 = el->total_frames;
+	long n;
+	int dl = 0;
+	int last_lm = 0;
+	int index = 0;
+	long max = (el->total_frames/2) -1;
+	long prev = 0;
+
+	if( el == NULL || el->is_empty || el->total_frames < 2 )
+		return 0;
+
+	for( n = n1; n < n2; n ++ ) {
+		vj_el_get_video_frame(el, n, tmp );
+		int lm = luminance_mean( tmp, w, h );
+		if( n == 0 ) {
+			dl = 0;
+		}
+		else {
+			dl = abs( lm - last_lm );
+		}
+		last_lm = lm;
+
+		veejay_msg(VEEJAY_MSG_DEBUG,"frame %ld/%ld luminance mean %d, delta %d ", n, n2, lm, dl );
+
+		if( dl > dl_threshold ) {
+
+			if( prev == 0 ) {
+				sample_new_simple(el,0,n);
+				veejay_msg(VEEJAY_MSG_INFO,"sampled frames %ld - %ld", 0,n);
+			} else {
+				sample_new_simple(el,prev,n);
+				veejay_msg(VEEJAY_MSG_INFO,"sampled frames %ld - %ld", prev, n );
+			}
+
+			prev = n;
+			index ++;
+		}	
+	}
+	return index;
+}
 
 editlist *vj_el_init_with_args(char **filename, int num_files, int flags, int deinterlace, int force,char norm , int out_format, int width, int height)
 {

veejay-current/veejay-server/libel/vj-el.h

@@ -155,4 +155,6 @@ float	vj_el_get_default_framerate( int norm );
 
 char	vj_el_get_default_norm( float fps );
 
+int	vj_el_auto_detect_scenes( editlist *el, uint8_t *tmp[4], int w, int h, int dl_threshold );
+
 #endif

veejay-current/veejay-server/libsample/sampleadm.c

@@ -337,6 +337,8 @@ sample_info *sample_skeleton_new(long startFrame, long endFrame)
     return si;
 }
 
+
+
 int sample_store(sample_info * skel)
 {
     hnode_t *sample_node;
@@ -359,6 +361,15 @@ int sample_store(sample_info * skel)
     return 0;
 }
 
+void 	sample_new_simple( void *el, long start, long end )
+{
+	sample_info *sample = sample_skeleton_new(start,end);
+	if(sample) {
+		sample->edit_list = el;
+		sample_store(sample);
+	}
+}
+
 /****************************************************************************************************
  *
  * sample_get(int sample_id)

veejay-current/veejay-server/libsample/sampleadm.h

@@ -192,6 +192,7 @@ extern int sample_set_state(int new_state);
 extern int sample_get_state();
 extern sample_info *sample_skeleton_new(long startFrame, long endFrame);
 extern sample_info *sample_get(int sample_id);
+void 	sample_new_simple( void *el, long start, long end );
 extern int sample_store(sample_info * skel);
 extern int sample_is_deleted(int s1);
 extern int sample_exists(int sample_id);

veejay-current/veejay-server/man/veejay.1

@@ -179,6 +179,9 @@ Do not start with projection enabled.
 .B \--qrcode-connection-info
 Encode veejay server IP and port number in QR code image
 .TP
+.B \-S/--scene-detection <threshold>
+Create new samples based on scene detection threshold. 
+.TP
 .B \--benchmark NxN
 Benchmark veejay's core functions (multi-thread vs single thread model) using a specific resolution NxN
 .TP

veejay-current/veejay-server/veejay/veejay.c

@@ -294,6 +294,8 @@ static void Usage(char *progname)
 	fprintf(stderr,
 		"  --qrcode-connection-info\tEncode veejay's external IP and port number into QR code\n" );
 #endif
+	fprintf(stderr,
+		"  -S/--scene-detection <num>\tCreate new samples based on scene detection threshold <num>\n");
 	fprintf(stderr,"  -q/--quit \t\t\tQuit at end of file\n");
 	fprintf(stderr,"\n\n");
 }
@@ -412,7 +414,12 @@ static int set_option(const char *name, char *value)
     } else if (strcmp(name, "size") == 0 || strcmp(name, "s") == 0) {
 	if (sscanf(value, "%dx%d", &info->bes_width, &info->bes_height) !=
 	    2) {
-	    fprintf(stderr,"-S/--size parameter requires NxN argument\n");
+	    fprintf(stderr,"-s/--size parameter requires NxN argument\n");
+	    nerr++;
+	}
+     } else if (strcmp(name,"scene-detection" ) == 0 || strcmp( name,"S") == 0 ) {
+	if ((sscanf(value, "%d", &info->uc->scene_detection )) != 1 ) {
+		fprintf(stderr, "-S/--scene-detection requires threshold argument\n");
 		nerr++;
 	}
      }
@@ -574,6 +581,7 @@ static int check_command_line_options(int argc, char *argv[])
 	{"swap-range",0,0,0},
 	{"load-generators",1,0,0},
 	{"qrcode-connection-info",0,0,0},
+	{"scene-detection",1,0,0},
 	{0, 0, 0, 0}
     };
 #endif
@@ -587,12 +595,12 @@ static int check_command_line_options(int argc, char *argv[])
 #ifdef HAVE_GETOPT_LONG
     while ((n =
 	    getopt_long(argc, argv,
-			"o:G:O:a:H:s:c:t:j:l:p:m:h:w:x:y:r:f:Y:A:N:H:W:M:T:F:nILPVDugvBdibjqeZ:",
+			"o:G:O:a:H:s:c:t:j:l:p:m:h:w:x:y:r:f:Y:A:N:H:W:M:T:F:nILPVDugvBdibjqeZ:S:",
 			long_options, &option_index)) != EOF)
 #else
     while ((n =
 	    getopt(argc, argv,
-		   	"o:G:O:a:H:s:c:t:j:l:p:m:h:w:x:y:r:f:Y:A:N:H:W:M:T:F:nILPVDugvBdibjqeZ:"
+		   	"o:G:O:a:H:s:c:t:j:l:p:m:h:w:x:y:r:f:Y:A:N:H:W:M:T:F:nILPVDugvBdibjqeZ:S:"
 						   )) != EOF)
 #endif
     {

veejay-current/veejay-server/veejay/vj-lib.h

@@ -252,6 +252,7 @@ typedef struct {
     int geox;
     int geoy;
     int file_as_sample;
+    int scene_detection;
     int mouse[4];
     char *osd_extra;
 } user_control;

veejay-current/veejay-server/veejay/vj-perform.c

@@ -740,6 +740,10 @@ int vj_perform_init(veejay_t * info)
 			( mlock_success ? "is not going to be" : "may be" )
 		); 
 
+	if( info->uc->scene_detection ) {
+		vj_el_auto_detect_scenes( info->edit_list, temp_buffer, w,h, info->uc->scene_detection );
+	}
+
 	return 1;
 }