import the recent additions for video console into trunk,

giving you support for up to 9 video sources (e.g. webcams,
or X11 grabbers, etc.) active at once, displaying thumbnails for
each of them in the main GUI window, and with the ability to switch
between them on the fly during a conversation.

The code also implements a 'Picture in Picture' feature,
allowing you to select any source as primary or secondary,
and move the PiP window by just dragging it with the mouse.

The window looks like this:
 ________________________________________________________________
|  ______   ______   ______   ______   ______   ______   ______  |
| | tn.1 | | tn.2 | | tn.3 | | tn.4 | | tn.5 | | tn.6 | | tn.7 | |
| |______| |______| |______| |______| |______| |______| |______| |
|  ______   ______   ______   ______   ______   ______   ______  |
| |______| |______| |______| |______| |______| |______| |______| |
|  _________________    __________________    _________________  |
| |                 |  |                  |  |                 | |
| |                 |  |                  |  |                 | |
| |                 |  |                  |  |                 | |
| |   remote video  |  |                  |  |   local video   | |
| |                 |  |                  |  |          ______ | |
| |                 |  |      keypad      |  |         |  PIP || |
| |                 |  |                  |  |         |______|| |
| |_________________|  |                  |  |_________________| |
|                      |                  |                      |
|                      |                  |                      |
|                      |__________________|                      |
|________________________________________________________________|



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@126480 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 517 insertions, 63 deletions

diff --git a/channels/console_gui.c b/channels/console_gui.c
index 699e6b1fa..a228c3ce7 100644
--- a/channels/console_gui.c
+++ b/channels/console_gui.c
@@ -7,30 +7,72 @@
 /*
  * GUI layout, structure and management
  
-For the GUI we use SDL to create a large surface (gui->screen)
-containing tree sections: remote video on the left, local video
-on the right, and the keypad with all controls and text windows
-in the center.
-The central section is built using an image for the skin, fonts and
-other GUI elements.  Comments embedded in the image to indicate to
-what function each area is mapped to.
+For the GUI we use SDL to create a large surface (gui->screen) with 4 areas:
+remote video on the left, local video on the right, keypad with all controls
+and text windows in the center, and source device thumbnails on the top.
+The top row is not displayed if no devices are specified in the config file.
+
+     ________________________________________________________________
+    |  ______   ______   ______   ______   ______   ______   ______  |
+    | | tn.1 | | tn.2 | | tn.3 | | tn.4 | | tn.5 | | tn.6 | | tn.7 | |
+    | |______| |______| |______| |______| |______| |______| |______| |
+    |  ______   ______   ______   ______   ______   ______   ______  |
+    | |______| |______| |______| |______| |______| |______| |______| |
+    |  _________________    __________________    _________________  |
+    | |                 |  |                  |  |                 | |
+    | |                 |  |                  |  |                 | |
+    | |                 |  |                  |  |                 | |
+    | |   remote video  |  |                  |  |   local video   | |
+    | |                 |  |                  |  |          ______ | |
+    | |                 |  |      keypad      |  |         |  PIP || |
+    | |                 |  |                  |  |         |______|| |
+    | |_________________|  |                  |  |_________________| |
+    |                      |                  |                      |
+    |                      |                  |                      |
+    |                      |__________________|                      |
+    |________________________________________________________________|
+
+
+The central section is built using an image (jpg, png, maybe gif too)
+for the skin, and other GUI elements.  Comments embedded in the image
+indicate to what function each area is mapped to.
+Another image (png with transparency) is used for the font.
 
 Mouse and keyboard events are detected on the whole surface, and
 handled differently according to their location:
-
+- center/right click on the local/remote window are used to resize
+  the corresponding window;
+- clicks on the thumbnail start/stop sources and select them as
+  primary or secondary video sources;
 - drag on the local video window are used to move the captured
-  area (in the case of X11 grabber) or the picture-in-picture
-  location (in case of camera included on the X11 grab).
-- click on the keypad are mapped to the corresponding key;
+  area (in the case of X11 grabber) or the picture-in-picture position;
+- keystrokes on the keypad are mapped to the corresponding key;
+  keystrokes are used as keypad functions, or as text input
+  if we are in text-input mode.
 - drag on some keypad areas (sliders etc.) are mapped to the
   corresponding functions;
-- keystrokes are used as keypad functions, or as text input
-  if we are in text-input mode.
 
 Configuration options control the appeareance of the gui:
 
-    keypad = /tmp/phone.jpg	; the skin
-    keypad_font = /tmp/font.ttf	; the font to use for output (XXX deprecated)
+    keypad = /tmp/kpad2.jpg	; the skin
+    keypad_font = /tmp/font.png	; the font to use for output
+
+For future implementation, intresting features can be the following:
+- freeze of the video coming from our remote party
+- save of the whole SDL window as a picture
+- oudio output device switching
+
+The audio switching feature should allow changing the device
+or switching to a recorded message for audio sent to remote party.
+The selection of the device should happen clicking on a marker in the layout.
+For this reason above the thumbnails row in the layout we would like a new row,
+the elements composing the row could be message boards, reporting the name of the
+device or the path of the message to be played.
+
+For video input freeze and entire window capture, we define 2 new key types,
+those should be activated pressing the buttons on the keypad, associated with
+new regions inside the keypad pictureas comments
+
 
  *
  */
@@ -42,13 +84,15 @@ Configuration options control the appeareance of the gui:
 #include "asterisk/utils.h"	/* ast_calloc and ast_realloc */
 #include <math.h>		/* sqrt */
 
-/* We use 3 'windows' in the GUI */
-enum { WIN_LOCAL, WIN_REMOTE, WIN_KEYPAD, WIN_MAX };
+/* We use a maximum of 12 'windows' in the GUI */
+enum { WIN_LOCAL, WIN_REMOTE, WIN_KEYPAD, WIN_SRC1,
+	WIN_SRC2, WIN_SRC3, WIN_SRC4, WIN_SRC5,
+	WIN_SRC6, WIN_SRC7, WIN_SRC8, WIN_SRC9, WIN_MAX };
 
 #ifndef HAVE_SDL	/* stubs if we don't have any sdl */
 static void show_frame(struct video_desc *env, int out)	{}
 static void sdl_setup(struct video_desc *env)		{}
-static struct gui_info *cleanup_sdl(struct gui_info *gui)	{ return NULL; }
+static struct gui_info *cleanup_sdl(struct gui_info* g, int n)	{ return NULL; }
 static void eventhandler(struct video_desc *env, const char *caption)	{}
 static int keypad_cfg_read(struct gui_info *gui, const char *val)	{ return 0; }
 
@@ -65,6 +109,9 @@ static int keypad_cfg_read(struct gui_info *gui, const char *val)	{ return 0; }
 #include <X11/Xlib.h>
 #endif
 
+#define BORDER	5		/* border around our windows */
+#define SRC_MSG_BD_H 20		/* height of the message board below those windows */
+
 enum kp_type { KP_NONE, KP_RECT, KP_CIRCLE };
 struct keypad_entry {
         int c;  /* corresponding character */
@@ -75,11 +122,18 @@ struct keypad_entry {
 /* our representation of a displayed window. SDL can only do one main
  * window so we map everything within that one
  */
-struct display_window {   
+struct display_window {
 	SDL_Overlay	*bmp;
 	SDL_Rect	rect;	/* location of the window */
 };
 
+/* each thumbnail message board has a rectangle associated for the geometry,
+ * and a board structure, we include these two elements in a singole structure */
+struct thumb_bd {
+	SDL_Rect		rect;		/* the rect for geometry and background */
+	struct board		*board;		/* the board */
+};
+
 struct gui_info {
 	enum kb_output		kb_output;	/* where the keyboard output goes */
 	struct drag_info	drag;		/* info on the window are we dragging */
@@ -92,9 +146,11 @@ struct gui_info {
 	SDL_Surface		*font;		/* font to be used */ 
 	SDL_Rect		font_rects[96];	/* only printable chars */
 
-	/* each board has two rectangles,
+	/* each of the following board has two rectangles,
 	 * [0] is the geometry relative to the keypad,
 	 * [1] is the geometry relative to the whole screen
+	 * we do not use the thumb_bd for these boards because here we need
+	 * 2 rectangles for geometry
 	 */
 	SDL_Rect		kp_msg[2];		/* incoming msg, relative to kpad */
 	struct board		*bd_msg;
@@ -105,6 +161,12 @@ struct gui_info {
 	SDL_Rect		kp_dialed[2];	/* dialed number */
 	struct board		*bd_dialed;
 
+	/* other boards are one associated with the source windows
+	 * above the keypad in the layout, we only have the geometry
+	 * relative to the whole screen
+	 */
+	struct thumb_bd		thumb_bd_array[MAX_VIDEO_SOURCES];
+
 	/* variable-size array mapping keypad regions to functions */
 	int kp_size, kp_used;
 	struct keypad_entry *kp;
@@ -115,7 +177,7 @@ struct gui_info {
 /*! \brief free the resources in struct gui_info and the descriptor itself.
  *  Return NULL so we can assign the value back to the descriptor in case.
  */
-static struct gui_info *cleanup_sdl(struct gui_info *gui)
+static struct gui_info *cleanup_sdl(struct gui_info *gui, int device_num)
 {
 	int i;
 
@@ -142,11 +204,43 @@ static struct gui_info *cleanup_sdl(struct gui_info *gui)
 			SDL_FreeYUVOverlay(gui->win[i].bmp);
 	}
 	bzero(gui, sizeof(gui));
+
+	/* deallocates the space allocated for the keypad message boards */
+	if (gui->bd_dialed)
+		delete_board(gui->bd_dialed);
+	if (gui->bd_msg)
+		delete_board(gui->bd_msg);
+
+	/* deallocates the space allocated for the thumbnail message boards */
+	for (i = 0; i < device_num; i++) {
+		if (gui->thumb_bd_array[i].board) /* may be useless */
+			delete_board(gui->thumb_bd_array[i].board);
+	}
+	
 	ast_free(gui);
 	SDL_Quit();
 	return NULL;
 }
 
+/* messages to be displayed in the sources message boards
+ * below the source windows
+ */
+
+/* costants defined to describe status of devices */
+#define IS_PRIMARY 1
+#define IS_SECONDARY 2
+#define IS_ON 4
+
+char* src_msgs[] = {
+	"    OFF",
+	"1   OFF",
+	"  2 OFF",
+	"1+2 OFF",
+	"    ON",
+	"1   ON",
+	"  2 ON",
+	"1+2 ON",
+};
 /*
  * Display video frames (from local or remote stream) using the SDL library.
  * - Set the video mode to use the resolution specified by the codec context
@@ -171,7 +265,7 @@ static void show_frame(struct video_desc *env, int out)
 		b_in = &env->enc_in;
 		b_out = &env->loc_dpy;
 		p_in = NULL;
-	} else {
+	} else if (out == WIN_REMOTE) {
 		/* copy input format from the decoding context */
 		AVCodecContext *c;
 		if (env->in == NULL)	/* XXX should not happen - decoder not ready */
@@ -184,7 +278,14 @@ static void show_frame(struct video_desc *env, int out)
 
 		b_out = &env->rem_dpy;
 		p_in = (AVPicture *)env->in->d_frame;
-	}
+	} else {
+		int i = out-WIN_SRC1;
+		b_in = env->out.devices[i].dev_buf;
+		if (b_in == NULL)
+			return;
+		p_in = NULL;
+		b_out = &env->src_dpy[i];
+	}		
 	bmp = gui->win[out].bmp;
 	SDL_LockYUVOverlay(bmp);
 	/* output picture info - this is sdl, YUV420P */
@@ -236,6 +337,21 @@ enum skin_area {
 	KEY_DIALED = 203,	/* area for dialed numbers */
 	KEY_EDIT = 204,		/* area for editing user input */
 
+#ifdef notyet /* XXX for future implementation */
+	KEY_AUDIO_SRCS = 210,
+	/*indexes between 210 and 219 (or more) have been reserved for the "keys"
+	associated with the audio device markers, clicking on these markers
+	will change the source device for audio output */
+
+	KEY_FREEZE = 220,	/* freeze the incoming video */
+	KEY_CAPTURE = 221,	/* capture the whole SDL window as a picture */
+#endif
+	/* video source switching key(s) */
+	KEY_PIP = 230,
+	/*indexes between 231 and 239 have been reserved for the "keys"
+	associated with the device thumbnails, clicking on these pictures
+	will change the source device for primary or secondary (PiP) video output*/
+	KEY_SRCS_WIN = 231, /* till 239 */
 	/* areas outside the keypad - simulated */
 	KEY_OUT_OF_KEYPAD = 241,
 	KEY_REM_DPY = 242,
@@ -270,15 +386,16 @@ static char *keypad_toggle(struct video_desc *env, int index)
 	ast_log(LOG_WARNING, "keypad_toggle(%i) called\n", index);
 
 	switch (index) {
-	case KEY_SENDVIDEO:
+	case KEY_SENDVIDEO: /* send or do not send video */
 		env->out.sendvideo = !env->out.sendvideo;
 		break;
-#ifdef notyet
-	case KEY_MUTE: {
-		struct chan_oss_pvt *o = find_desc(oss_active);
-		o->mute = !o->mute;
-		}
+	case KEY_PIP: /* enable or disable Picture in Picture */
+		env->out.picture_in_picture = !env->out.picture_in_picture;
+		break;
+	case KEY_MUTE: /* send or do not send audio */
+		ast_cli_command(env->gui->outfd, "console mute toggle");
 		break;
+#ifdef notyet
 	case KEY_AUTOANSWER: {
 		struct chan_oss_pvt *o = find_desc(oss_active);
 		o->autoanswer = !o->autoanswer;
@@ -357,6 +474,130 @@ static void set_drag(struct drag_info *drag, int x, int y, enum drag_window win)
 	drag->drag_window = win;
 }
 
+static int update_device_info(struct video_desc *env, int i)
+{
+	reset_board(env->gui->thumb_bd_array[i].board);
+	print_message(env->gui->thumb_bd_array[i].board,
+		src_msgs[env->out.devices[i].status_index]);
+	return 0;
+}
+
+/*! \brief Changes the video output (local video) source, controlling if
+ * it is already using that video device, 
+ * and switching the correct fields of env->out.
+ * grabbers are always open and saved in the device table.
+ * The secondary or the primary device can be changed,
+ * according to the "button" parameter:
+ * the primary device is changed if button = SDL_BUTTON_LEFT;
+ * the secondary device is changed if button = not SDL_BUTTON_LEFT;
+ * 
+ * the correct message boards of the sources are also updated
+ * with the new status
+ * 
+ * \param env = pointer to the video environment descriptor
+ * \param index = index of the device the caller wants to use are primary or secondary device
+ * \param button = button clicked on the mouse
+ *
+ * returns 0 on success,
+ * returns 1 on error 
+ */
+static int switch_video_out(struct video_desc *env, int index, Uint8 button)
+{
+	int *p; /* pointer to the index of the device to select */
+
+	if (index >= env->out.device_num) {
+		ast_log(LOG_WARNING, "no devices\n");
+		return 1;
+	}
+	/* select primary or secondary */
+	p = (button == SDL_BUTTON_LEFT) ? &env->out.device_primary :
+		&env->out.device_secondary;
+	/* controls if the device is already selected */
+	if (index == *p) {
+		ast_log(LOG_WARNING, "device %s already selected\n", env->out.devices[index].name);
+		return 0;
+	}
+	ast_log(LOG_WARNING, "switching to %s...\n", env->out.devices[index].name);
+	/* already open */
+	if (env->out.devices[index].grabber) {
+		/* we also have to update the messages in the source 
+		message boards below the source windows */
+		/* first we update the board of the previous source */
+		if (p == &env->out.device_primary)
+			env->out.devices[*p].status_index &= ~IS_PRIMARY;
+		else
+			env->out.devices[*p].status_index &= ~IS_SECONDARY;
+		update_device_info(env, *p);
+		/* update the index used as primary or secondary */
+		*p = index;
+		ast_log(LOG_WARNING, "done\n");
+		/* then we update the board of the new primary or secondary source */
+		if (p == &env->out.device_primary)
+			env->out.devices[*p].status_index |= IS_PRIMARY;
+		else
+			env->out.devices[*p].status_index |= IS_SECONDARY;
+		update_device_info(env, *p);
+		return 0;
+	}
+	/* device is off, just do nothing */
+	ast_log(LOG_WARNING, "device is down\n");
+	return 1;
+}
+
+/*! \brief tries to switch the state of a device from on to off or off to on
+ * we also have to update the status of the device and the correct message board
+ *
+ * \param index = the device that must be turned on or off
+ * \param env = pointer to the video environment descriptor
+ *
+ * returns:
+ * - 0 on falure switching from off to on
+ * - 1 on success in switching from off to on
+ * - 2 on success in switching from on to off
+*/
+static int turn_on_off(int index, struct video_desc *env)
+{
+	struct video_device *p = &env->out.devices[index];
+
+	if (index >= env->out.device_num) {
+		ast_log(LOG_WARNING, "no devices\n");
+		return 0;
+	}
+
+	if (!p->grabber) { /* device off */
+		void *g_data; /* result of grabber_open() */
+		struct grab_desc *g;
+		int i;
+
+		/* see if the device can be used by one of the existing drivers */
+		for (i = 0; (g = console_grabbers[i]); i++) {
+			/* try open the device */
+			g_data = g->open(p->name, &env->out.loc_src_geometry, env->out.fps);
+			if (!g_data)	/* no luck, try the next driver */
+				continue;
+			p->grabber = g;
+			p->grabber_data = g_data;
+			/* update the status of the source */
+			p->status_index |= IS_ON;
+			/* print the new message in the message board */
+			update_device_info(env, index);
+			return 1; /* open succeded */
+		}
+		return 0; /* failure */
+	} else {
+		/* the grabber must be closed */
+		p->grabber_data = p->grabber->close(p->grabber_data);
+		p->grabber = NULL;
+		/* dev_buf is already freed by grabber->close() */
+		p->dev_buf = NULL;
+		/* update the status of the source */
+		p->status_index &= ~IS_ON;
+		/* print the new message in the message board */
+		update_device_info(env, index);
+		return 2; /* closed */
+	}	
+}
+
 /*
  * Handle SDL_MOUSEBUTTONDOWN type, finding the palette
  * index value and calling the right callback.
@@ -367,29 +608,83 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 {
 	uint8_t index = KEY_OUT_OF_KEYPAD;	/* the key or region of the display we clicked on */
 	struct gui_info *gui = env->gui;
+		
+	int i; /* integer variable used as iterator */
 
+	int x; /* integer variable usable as a container */
+	
+	/* total width of source device thumbnails */
+	int src_wins_tot_w = env->out.device_num*(SRC_WIN_W+BORDER)+BORDER;
+
+	/* x coordinate of the center of the keypad */
+	int x0 = MAX(env->rem_dpy.w+gui->keypad->w/2+2*BORDER, src_wins_tot_w/2);
+	
 #if 0
 	ast_log(LOG_WARNING, "event %d %d have %d/%d regions at %p\n",
 		button.x, button.y, gui->kp_used, gui->kp_size, gui->kp);
 #endif
 	/* for each mousedown we end previous drag */
 	gui->drag.drag_window = DRAG_NONE;
-
+	
 	/* define keypad boundary */
-	if (button.x < env->rem_dpy.w)
-		index = KEY_REM_DPY; /* click on remote video */
-	else if (button.x > env->rem_dpy.w + gui->keypad->w)
-		index = KEY_LOC_DPY; /* click on local video */
-	else if (button.y > gui->keypad->h)
-		index = KEY_OUT_OF_KEYPAD; /* click outside the keypad */
-	else if (gui->kp) {
-		int i;
-		for (i = 0; i < gui->kp_used; i++) {
-			if (kp_match_area(&gui->kp[i], button.x - env->rem_dpy.w, button.y)) {
-				index = gui->kp[i].c;
-				break;
+	/* XXX this should be extended for clicks on different audio device markers */
+	if (button.y >= (env->out.device_num ? SRC_WIN_H+2*BORDER+SRC_MSG_BD_H : 0)) {
+		/* if control reaches this point this means that the clicked point is
+		below the row of the additional sources windows*/
+		/* adjust the y coordinate as if additional devices windows were not present */
+		button.y -= (env->out.device_num ? SRC_WIN_H+2*BORDER+SRC_MSG_BD_H : 0);
+		if (button.y < BORDER)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.y >= MAX(MAX(env->rem_dpy.h, env->loc_dpy.h), gui->keypad->h))
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x < x0 - gui->keypad->w/2 - BORDER - env->rem_dpy.w)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x < x0 - gui->keypad->w/2 - BORDER)
+			index = KEY_REM_DPY;
+		else if (button.x < x0 - gui->keypad->w/2)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x >= x0 + gui->keypad->w/2 + BORDER + env->loc_dpy.w)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x >= x0 + gui->keypad->w/2 + BORDER)
+			index = KEY_LOC_DPY;
+		else if (button.x >= x0 + gui->keypad->w/2)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (gui->kp) {
+			/* we have to calculate the first coordinate 
+			inside the keypad before calling the kp_match_area*/
+			int x_keypad = button.x - (x0 - gui->keypad->w/2);
+			/* find the key clicked (if one was clicked) */
+			for (i = 0; i < gui->kp_used; i++) {
+				if (kp_match_area(&gui->kp[i],x_keypad, button.y - BORDER)) {
+					index = gui->kp[i].c;
+					break;
+				}
 			}
 		}
+	} else if (button.y < BORDER) {
+		index = KEY_OUT_OF_KEYPAD;
+	} else {  /* we are in the thumbnail area */
+		x = x0 - src_wins_tot_w/2 + BORDER;
+		if (button.y >= BORDER + SRC_WIN_H)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x < x)
+			index = KEY_OUT_OF_KEYPAD;
+		else if (button.x < x + src_wins_tot_w - BORDER) {
+			/* note that the additional device windows 
+			are numbered from left to right
+			starting from 0, with a maximum of 8, the index associated on a click is:
+			KEY_SRCS_WIN + number_of_the_window */
+			for (i = 1; i <= env->out.device_num; i++) {
+				if (button.x < x+i*(SRC_WIN_W+BORDER)-BORDER) {
+					index = KEY_SRCS_WIN+i-1;
+					break;
+				} else if (button.x < x+i*(SRC_WIN_W+BORDER)) {
+					index = KEY_OUT_OF_KEYPAD;
+					break;
+				}
+			}
+		} else
+			index = KEY_OUT_OF_KEYPAD;
 	}
 
 	/* exec the function */
@@ -397,6 +692,37 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 		keypad_digit(env, index);
 		return;
 	}
+
+	else if (index >= KEY_SRCS_WIN && index < KEY_SRCS_WIN+env->out.device_num) {
+		index -= KEY_SRCS_WIN; /* index of the window, equal to the device index in the table */
+		/* if one of the additional device windows is clicked with
+		left or right mouse button, we have to switch to that device */
+		if (button.button == SDL_BUTTON_RIGHT || button.button == SDL_BUTTON_LEFT) {
+			switch_video_out(env, index, button.button);
+			return;
+		}
+		/* turn on or off the devices selectively with other mouse buttons */
+		else {
+			int ret = turn_on_off(index, env);
+			/* print a message according to what happened */
+			if (!ret)
+				ast_log(LOG_WARNING, "unable to turn on device %s\n",
+					env->out.devices[index].name);
+			else if (ret == 1)
+				ast_log(LOG_WARNING, "device %s changed state to on\n",
+					env->out.devices[index].name);
+			else if (ret == 2)
+				ast_log(LOG_WARNING, "device %s changed state to off\n",
+					env->out.devices[index].name);
+			return;
+		}
+	}
+
+	/* XXX for future implementation
+	else if (click on audio source marker)
+		change audio source device
+	*/
+
 	switch (index) {
 	/* answer/close function */
 	case KEY_PICK_UP:
@@ -407,9 +733,10 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 		break;
 
 	/* other functions */
-	case KEY_MUTE:
+	case KEY_MUTE: /* send or not send the audio */
 	case KEY_AUTOANSWER:
-	case KEY_SENDVIDEO:
+	case KEY_SENDVIDEO: /* send or not send the video */
+	case KEY_PIP: /* activate/deactivate picture in picture mode */
 		keypad_toggle(env, index);
 		break;
 
@@ -418,6 +745,13 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 	case KEY_REMOTEVIDEO:
 		break;
 
+#ifdef notyet /* XXX for future implementations */
+	case KEY_FREEZE:
+		break
+	case KEY_CAPTURE:
+		break;
+#endif
+
 	case KEY_MESSAGEBOARD:
 		if (button.button == SDL_BUTTON_LEFT)
 			set_drag(&gui->drag, button.x, button.y, DRAG_MESSAGE);
@@ -427,8 +761,26 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 	case KEY_LOC_DPY:
 	case KEY_REM_DPY:
 		if (button.button == SDL_BUTTON_LEFT) {
-			if (index == KEY_LOC_DPY)
+			/* values used to find the position of the picture in picture (if present) */
+			int pip_loc_x = (double)env->out.pip_x/env->enc_in.w * env->loc_dpy.w;
+			int pip_loc_y = (double)env->out.pip_y/env->enc_in.h * env->loc_dpy.h;
+			/* check if picture in picture is active and the click was on it */
+			if (index == KEY_LOC_DPY && env->out.picture_in_picture &&
+			  button.x >= x0+gui->keypad->w/2+BORDER+pip_loc_x &&
+			  button.x < x0+gui->keypad->w/2+BORDER+pip_loc_x+env->loc_dpy.w/3 &&
+			  button.y >= BORDER+pip_loc_y && 
+			  button.y < BORDER+pip_loc_y+env->loc_dpy.h/3) {
+				/* set the y cordinate to his previous value */
+				button.y += (env->out.device_num ? SRC_WIN_H+2*BORDER+SRC_MSG_BD_H : 0);
+				/* starts dragging the picture inside the picture */
+				set_drag(&gui->drag, button.x, button.y, DRAG_PIP);
+			}
+			else if (index == KEY_LOC_DPY) {
+				/* set the y cordinate to his previous value */
+				button.y += (env->out.device_num ? SRC_WIN_H+2*BORDER+SRC_MSG_BD_H : 0);
+				/* click in the local display, but not on the PiP */
 				set_drag(&gui->drag, button.x, button.y, DRAG_LOCAL);
+			}
 			break;
 		} else {
 			char buf[128];
@@ -437,9 +789,21 @@ static void handle_mousedown(struct video_desc *env, SDL_MouseButtonEvent button
 				fb->w, fb->h);
 			video_geom(fb, buf);
 			sdl_setup(env);
+			/* writes messages in the source boards, those can be 
+			modified during the execution, because of the events 
+			this must be done here, otherwise the status of sources will not be
+			shown after sdl_setup */
+			for (i = 0; i < env->out.device_num; i++) {
+				update_device_info(env, i);
+			}
+			/* we also have to refresh other boards, 
+			to avoid messages to disappear after video resize */
+			print_message(gui->bd_msg, " \b");
+			print_message(gui->bd_dialed, " \b");
 		}
 		break;
 	case KEY_OUT_OF_KEYPAD:
+		ast_log(LOG_WARNING, "nothing clicked, coordinates: %d, %d\n", button.x, button.y);
 		break;
 
 	case KEY_DIGIT_BACKGROUND:
@@ -524,7 +888,7 @@ static void handle_keyboard_input(struct video_desc *env, SDL_keysym *ks)
 	return;
 }
 
-static void grabber_move(struct video_out_desc *, int dx, int dy);
+static void grabber_move(struct video_device *, int dx, int dy);
 
 int compute_drag(int *start, int end, int magnifier);
 int compute_drag(int *start, int end, int magnifier)
@@ -539,6 +903,33 @@ int compute_drag(int *start, int end, int magnifier)
 	return delta;
 }
 
+/*! \brief This function moves the picture in picture,
+ * controlling the limits of the containing buffer
+ * to avoid problems deriving from going through the limits.
+ *
+ * \param env = pointer to the descriptor of the video environment
+ * \param dx = the variation of the x position
+ * \param dy = the variation of the y position
+*/
+static void pip_move(struct video_desc* env, int dx, int dy) {
+	int new_pip_x = env->out.pip_x+dx;
+	int new_pip_y = env->out.pip_y+dy;
+	/* going beyond the left borders */
+	if (new_pip_x < 0)
+		new_pip_x = 0;
+	/* going beyond the right borders */
+	else if (new_pip_x > env->enc_in.w - env->enc_in.w/3)
+		new_pip_x = env->enc_in.w - env->enc_in.w/3;
+	/* going beyond the top borders */
+	if (new_pip_y < 0)
+		new_pip_y = 0;
+	/* going beyond the bottom borders */
+	else if (new_pip_y > env->enc_in.h - env->enc_in.h/3)
+		new_pip_y = env->enc_in.h - env->enc_in.h/3;
+	env->out.pip_x = new_pip_x;
+	env->out.pip_y = new_pip_y;
+}
+
 /*
  * I am seeing some kind of deadlock or stall around
  * SDL_PumpEvents() while moving the window on a remote X server
@@ -593,11 +984,24 @@ static void eventhandler(struct video_desc *env, const char *caption)
 
 			case SDL_MOUSEMOTION:
 			case SDL_MOUSEBUTTONUP:
-				if (drag->drag_window == DRAG_LOCAL) {
+				if (drag->drag_window == DRAG_LOCAL && env->out.device_num) {
 					/* move the capture source */
 					int dx = compute_drag(&drag->x_start, ev[i].motion.x, 3);
 					int dy = compute_drag(&drag->y_start, ev[i].motion.y, 3);
-					grabber_move(&env->out, dx, dy);
+					grabber_move(&env->out.devices[env->out.device_primary], dx, dy);
+				} else if (drag->drag_window == DRAG_PIP) {
+					/* move the PiP image inside the frames of the enc_in buffers */
+					int dx = ev[i].motion.x - drag->x_start;
+					int dy = ev[i].motion.y - drag->y_start;
+					/* dx and dy value are directly applied to env->out.pip_x and
+					env->out.pip_y, so they must work as if the format was cif */
+					dx = (double)dx*env->enc_in.w/env->loc_dpy.w;
+					dy = (double)dy*env->enc_in.h/env->loc_dpy.h;
+					/* sets starts to a new value */
+					drag->x_start = ev[i].motion.x;
+					drag->y_start = ev[i].motion.y;
+					/* ast_log(LOG_WARNING, "moving: %d, %d\n", dx, dy); */
+					pip_move(env, dx, dy);
 				} else if (drag->drag_window == DRAG_MESSAGE) {
 					/* scroll up/down the window */
 					int dy = compute_drag(&drag->y_start, ev[i].motion.y, 1);
@@ -808,7 +1212,15 @@ static void sdl_setup(struct video_desc *env)
 	const SDL_VideoInfo *info;
 	int kp_w = 0, kp_h = 0;	/* keypad width and height */
 	struct gui_info *gui = env->gui;
-
+	
+	/* Some helper variables used for filling the SDL window */
+	int x0; /* the x coordinate of the center of the keypad */
+	int x1; /* userful for calculating of the size of the parent window */
+	int y0; /* y coordinate of the keypad, the remote window and the local window */
+	int src_wins_tot_w; /* total width of the source windows */
+	int i;
+	int x; /* useful for the creation of the source windows; */
+	
 #ifdef HAVE_X11
 	const char *e = getenv("SDL_WINDOWID");
 
@@ -830,6 +1242,8 @@ static void sdl_setup(struct video_desc *env)
 	 * initialize the SDL environment. We have one large window
 	 * with local and remote video, and a keypad.
 	 * At the moment we arrange them statically, as follows:
+	 * - top row: thumbnails for local video sources;
+	 * - next row: message boards for local video sources
 	 * - on the left, the remote video;
 	 * - on the center, the keypad
 	 * - on the right, the local video
@@ -869,13 +1283,23 @@ static void sdl_setup(struct video_desc *env)
 			kp_h = gui->keypad->h;
 		}
 	}
-	/* XXX same for other boards */
-#define BORDER	5	/* border around our windows */
-	maxw = env->rem_dpy.w + env->loc_dpy.w + kp_w;
-	maxh = MAX( MAX(env->rem_dpy.h, env->loc_dpy.h), kp_h);
-	maxw += 4 * BORDER;
-	maxh += 2 * BORDER;
-
+	
+	/* total width of the thumbnails */
+	src_wins_tot_w = env->out.device_num*(SRC_WIN_W+BORDER)+BORDER;
+	
+	/* x coordinate of the center of the keypad */
+	x0 = MAX(env->rem_dpy.w+kp_w/2+2*BORDER, src_wins_tot_w/2);
+	
+	/* from center of the keypad to right border */
+	x1 = MAX(env->loc_dpy.w+kp_w/2+2*BORDER, src_wins_tot_w/2);
+	
+	/* total width of the SDL window to create */
+	maxw = x0+x1;
+	
+	/* total height of the mother window to create */
+	maxh = MAX( MAX(env->rem_dpy.h, env->loc_dpy.h), kp_h)+2*BORDER;
+	maxh += env->out.device_num ? (2*BORDER+SRC_WIN_H+SRC_MSG_BD_H) : 0;
+	
 	gui->screen = SDL_SetVideoMode(maxw, maxh, depth, 0);
 	if (!gui->screen) {
 		ast_log(LOG_ERROR, "SDL: could not set video mode - exiting\n");
@@ -974,24 +1398,53 @@ static void sdl_setup(struct video_desc *env)
 	}
     } while (0);
 #endif /* HAVE_X11 */
+
+	y0 = env->out.device_num ? (3*BORDER+SRC_WIN_H+SRC_MSG_BD_H) : BORDER;
+	
 	SDL_WM_SetCaption("Asterisk console Video Output", NULL);
+	
+	/* intialize the windows for local and remote video */
 	if (set_win(gui->screen, &gui->win[WIN_REMOTE], dpy_fmt,
-			env->rem_dpy.w, env->rem_dpy.h, BORDER, BORDER))
+			env->rem_dpy.w, env->rem_dpy.h, x0-kp_w/2-BORDER-env->rem_dpy.w, y0))
 		goto no_sdl;
 	if (set_win(gui->screen, &gui->win[WIN_LOCAL], dpy_fmt,
 			env->loc_dpy.w, env->loc_dpy.h,
-			3*BORDER+env->rem_dpy.w + kp_w, BORDER))
+			x0+kp_w/2+BORDER, y0))
 		goto no_sdl;
+	
+	/* initialize device_num source windows (thumbnails) and boards
+	(for a maximum of 9 additional windows and boards) */
+	x = x0 - src_wins_tot_w/2 + BORDER;
+	for (i = 0; i < env->out.device_num; i++){
+		struct thumb_bd *p = &gui->thumb_bd_array[i];
+		if (set_win(gui->screen, &gui->win[i+WIN_SRC1], dpy_fmt,
+			SRC_WIN_W, SRC_WIN_H, x+i*(BORDER+SRC_WIN_W), BORDER))
+			goto no_sdl;
+		/* set geometry for the rect for the message board of the device */
+		p->rect.w = SRC_WIN_W;
+		p->rect.h = SRC_MSG_BD_H;
+		p->rect.x = x+i*(BORDER+SRC_WIN_W);
+		p->rect.y = 2*BORDER+SRC_WIN_H;
+		/* the white color is used as background */
+		SDL_FillRect(gui->screen, &p->rect,
+			SDL_MapRGB(gui->screen->format, 255, 255, 255));
+		/* if necessary, initialize boards for the sources */
+		if (!p->board)
+			p->board =
+				board_setup(gui->screen, &p->rect,
+				gui->font, gui->font_rects);
+		/* update board rect */
+		SDL_UpdateRect(gui->screen, p->rect.x, p->rect.y, p->rect.w, p->rect.h);
+	}
 
 	/* display the skin, but do not free it as we need it later to
-	 * restore text areas and maybe sliders too.
-	 */
+	restore text areas and maybe sliders too */
 	if (gui->keypad) {
 		struct SDL_Rect *dest = &gui->win[WIN_KEYPAD].rect;
 		struct SDL_Rect *src = (gui->kp_rect.w > 0 && gui->kp_rect.h > 0) ? & gui->kp_rect : NULL;
 		/* set the coordinates of the keypad relative to the main screen */
-		dest->x = 2*BORDER + env->rem_dpy.w;
-		dest->y = BORDER;
+		dest->x = x0-kp_w/2;
+		dest->y = y0;
 		dest->w = kp_w;
 		dest->h = kp_h;
 		SDL_BlitSurface(gui->keypad, src, gui->screen, dest);
@@ -1003,7 +1456,7 @@ static void sdl_setup(struct video_desc *env)
 
 no_sdl:
 	/* free resources in case of errors */
-	env->gui = cleanup_sdl(gui);
+	env->gui = cleanup_sdl(gui, env->out.device_num);
 }
 
 /*
@@ -1043,6 +1496,7 @@ static int kp_match_area(const struct keypad_entry *e, int x, int y)
 
 struct _s_k { const char *s; int k; };
 static struct _s_k gui_key_map[] = {
+	{"PIP",		KEY_PIP},
 	{"PICK_UP",	KEY_PICK_UP },
 	{"PICKUP",	KEY_PICK_UP },
         {"HANG_UP",	KEY_HANG_UP },