[vlc-devel] [PATCH] Added hotkey for video transformation. Pressing Ctrl+Alt+r the user can navigate through the available transformation modes.

[Stefanos Orovas]

---
 include/vlc_keys.h        |    2 ++
 modules/control/hotkeys.c |   45 ++++++++++++++++++++++++++++++++++++++++++++-
 src/config/keys.c         |    1 +
 src/libvlc-module.c       |    8 ++++++++
 4 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/include/vlc_keys.h b/include/vlc_keys.h
index aafa589..027c812 100644
--- a/include/vlc_keys.h
+++ b/include/vlc_keys.h
@@ -211,6 +211,8 @@ typedef enum vlc_action {
     ACTIONID_ZOOM_DOUBLE,
     /* Cycle Through Audio Devices */
     ACTIONID_AUDIODEVICE_CYCLE,
+    /* Transforming */
+    ACTIONID_TRANSFORM,
     /* scaling */
     ACTIONID_TOGGLE_AUTOSCALE,
     ACTIONID_SCALE_UP,
diff --git a/modules/control/hotkeys.c b/modules/control/hotkeys.c
index ab68340..51ad890 100644
--- a/modules/control/hotkeys.c
+++ b/modules/control/hotkeys.c
@@ -836,7 +836,50 @@ static int PutAction( intf_thread_t *p_intf, int i_action )
             if( p_vout )
                 var_DecInteger( p_vout, "crop-right" );
             break;
-
+	case ACTIONID_TRANSFORM:
+	    if ( p_vout )
+	    {
+		char *psz_parser, *transform_type = "";
+		char *psz_string = config_GetPsz( p_vout, "video-filter" );
+		static int tr_mode = 0;
+
+		if ( !psz_string ) psz_string = strdup( "" );
+		psz_parser = strstr( psz_string, "transform" );
+
+		if ( !psz_parser ){
+		    psz_parser = psz_string;
+		    asprintf( &psz_string, ( *psz_string ) ? "%s:%s" : "%s%s", psz_string, "transform" );
+		}
+
+		switch( tr_mode ){
+	 	    case 0: transform_type = "90"; 	      break;
+		    case 1: transform_type = "180"; 	      break;
+		    case 2: transform_type = "270"; 	      break;
+		    case 3: transform_type = "hflip";         break;
+		    case 4: transform_type = "vflip";         break;
+		    case 5: transform_type = "transpose";     break;
+		    case 6: transform_type = "antitranspose"; break;
+		    case 7: // reset psz_string  
+		        if( *( psz_parser + strlen( "transform" ) ) == ':' )
+			    memmove( psz_parser, psz_parser + strlen( "transform" ) + 1,
+			          	 strlen( psz_parser + strlen( "transform" ) + 1 ) + 1 );
+			else *psz_parser = '\0';
+
+			/* Remove trailing : : */
+			size_t i_len = strlen( psz_string );
+			if( i_len > 0 && *( psz_string + i_len - 1 ) == ':' )
+			{
+			    *( psz_string + i_len - 1 ) = '\0';
+			}
+			break;
+		}
+		tr_mode ++; tr_mode = tr_mode % 8;
+	
+		config_PutPsz( p_intf, "transform-type", transform_type );
+		config_PutPsz( p_intf, "video-filter", psz_string );
+		var_SetString( p_vout, "video-filter", psz_string );
+	    }
+	    break;
          case ACTIONID_TOGGLE_AUTOSCALE:
             if( p_vout )
             {
diff --git a/src/config/keys.c b/src/config/keys.c
index 07c0d75..8c323a4 100644
--- a/src/config/keys.c
+++ b/src/config/keys.c
@@ -358,6 +358,7 @@ static const struct action actions[] =
     { "title-prev", ACTIONID_TITLE_PREV, },
     { "toggle-autoscale", ACTIONID_TOGGLE_AUTOSCALE, },
     { "toggle-fullscreen", ACTIONID_TOGGLE_FULLSCREEN, },
+    { "transform", ACTIONID_TRANSFORM, },
     { "uncrop-bottom", ACTIONID_UNCROP_BOTTOM, },
     { "uncrop-left", ACTIONID_UNCROP_LEFT, },
     { "uncrop-right", ACTIONID_UNCROP_RIGHT, },
diff --git a/src/libvlc-module.c b/src/libvlc-module.c
index 745c992..94cc950 100644
--- a/src/libvlc-module.c
+++ b/src/libvlc-module.c
@@ -1320,6 +1320,9 @@ static const char *const mouse_wheel_texts[] =
 #define AUDIODELAY_DOWN_KEY_TEXT N_("Audio delay down")
 #define AUDIODELAY_DOWN_KEY_LONGTEXT N_("Select the key to decrease the audio delay.")
 
+#define TRANSFORM_TEXT N_("Transform video")
+#define TRANSFORM_LONGTEXT N_("Transforms the video.")
+
 #define ZOOM_QUARTER_KEY_TEXT N_("1:4 Quarter")
 #define ZOOM_HALF_KEY_TEXT N_("1:2 Half")
 #define ZOOM_ORIGINAL_KEY_TEXT N_("1:1 Original")
@@ -2209,6 +2212,7 @@ vlc_module_begin ()
 #   define KEY_CHAPTER_PREV       "Ctrl+u"
 #   define KEY_CHAPTER_NEXT       "Ctrl+d"
 #   define KEY_SNAPSHOT           "Command+Alt+s"
+#   define KEY_TRANSFORM 	  "Ctrl+Alt+r"
 #   define KEY_ZOOM               "z"
 #   define KEY_UNZOOM             "Shift+z"
 #   define KEY_RANDOM             "Command+z"
@@ -2335,6 +2339,8 @@ vlc_module_begin ()
 #   define KEY_CHAPTER_NEXT       "Shift+n"
 #   define KEY_SNAPSHOT           "Shift+s"
 
+#   define KEY_TRANSFORM 	  "Ctrl+Alt+r"
+
 #   define KEY_ZOOM               "z"
 #   define KEY_UNZOOM             "Shift+z"
 
@@ -2543,6 +2549,8 @@ vlc_module_begin ()
              RANDOM_KEY_TEXT, RANDOM_KEY_LONGTEXT, false )
     add_key( "key-loop", KEY_LOOP,
              LOOP_KEY_TEXT, LOOP_KEY_LONGTEXT, false )
+    add_key( "key-transform", KEY_TRANSFORM,
+	     TRANSFORM_TEXT, TRANSFORM_LONGTEXT, false )
 
     set_section ( N_("Zoom" ), NULL )
     add_key( "key-zoom-quarter",  KEY_ZOOM_QUARTER,
-- 
1.7.9.5