CLI option: --visualize

Displays the encoded video along with MB types and motion vectors.
patch by Tuukka Toivonen.


git-svn-id: svn://svn.videolan.org/x264/trunk@227 df754926-b1dd-0310-bc7b-ec298dee348c

Makefile

@@ -9,6 +9,11 @@ SRCS = common/mc.c common/predict.c common/pixel.c common/macroblock.c \
        encoder/set.c encoder/macroblock.c encoder/cabac.c \
        encoder/cavlc.c encoder/encoder.c encoder/eval.c
 
+# Visualization sources
+ifeq ($(VIS),yes)
+SRCS   += common/visualize.c common/display-x11.c
+endif
+
 # MMX/SSE optims
 ifeq ($(ARCH),X86)
 SRCS   += common/i386/mc-c.c common/i386/dct-c.c common/i386/predict.c

common/common.h

@@ -455,6 +455,10 @@ struct x264_t
     x264_vlc_table_t *x264_total_zeros_lookup[15];
     x264_vlc_table_t *x264_total_zeros_dc_lookup[3];
     x264_vlc_table_t *x264_run_before_lookup[7];
+
+#if VISUALIZE
+    struct visualize_t *visualize;
+#endif
 };
 
 #endif

common/display-x11.c

+/*****************************************************************************
+ * x264: h264 encoder
+ *****************************************************************************
+ * Copyright (C) 2005 x264 project
+ *
+ * Author: Tuukka Toivonen <tuukkat@ee.oulu.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "display.h"
+
+static long event_mask = ConfigureNotify|ExposureMask|KeyPressMask|ButtonPressMask|StructureNotifyMask|ResizeRedirectMask;
+
+static Display *disp_display = NULL;
+static struct disp_window {
+	int init;
+	Window window;
+} disp_window[10];
+
+static inline void disp_chkerror(int cond, char *e) {
+	if (!cond) return;
+	fprintf(stderr, "error: %s\n", e ? e : "?");
+	abort();
+}
+
+static void disp_init_display(void) {
+	Visual *visual;
+	int dpy_class;
+	int screen;
+	int dpy_depth;
+
+	if (disp_display != NULL) return;
+	memset(&disp_window, 0, sizeof(disp_window));
+	disp_display = XOpenDisplay("");
+	disp_chkerror(!disp_display, "no display");
+	screen = DefaultScreen(disp_display);
+	visual = DefaultVisual(disp_display, screen);
+	dpy_class = visual->class;
+	dpy_depth = DefaultDepth(disp_display, screen);
+	disp_chkerror(!((dpy_class == TrueColor && dpy_depth == 32)
+		|| (dpy_class == TrueColor && dpy_depth == 24)
+		|| (dpy_class == TrueColor && dpy_depth == 16)
+		|| (dpy_class == PseudoColor && dpy_depth == 8)),
+		"requires 8 bit PseudoColor or 16/24/32 bit TrueColor display");
+}
+
+static void disp_init_window(int num, int width, int height, const unsigned char *tit) {
+	XSizeHints *shint;
+	XSetWindowAttributes xswa;
+	XEvent xev;
+	int screen = DefaultScreen(disp_display);
+	Visual *visual = DefaultVisual (disp_display, screen);
+	unsigned int fg, bg;
+	unsigned int mask;
+	char title[200];
+	Window window;
+	int dpy_depth;
+
+	if (tit) {
+		snprintf(title, 200, "%s: %i/disp", tit, num);
+	} else {
+		snprintf(title, 200, "%i/disp", num);
+	}
+	shint = XAllocSizeHints();
+	disp_chkerror(!shint, "memerror");
+	shint->min_width = shint->max_width = shint->width = width;
+	shint->min_height = shint->max_height = shint->height = height;
+	shint->flags = PSize | PMinSize | PMaxSize;
+	disp_chkerror(num<0 || num>=10, "bad win num");
+	if (!disp_window[num].init) {
+		disp_window[num].init = 1;
+		bg = WhitePixel(disp_display, screen);
+		fg = BlackPixel(disp_display, screen);
+		dpy_depth = DefaultDepth(disp_display, screen);
+		if (dpy_depth==32 || dpy_depth==24 || dpy_depth==16) {
+			mask |= CWColormap;
+			xswa.colormap = XCreateColormap(disp_display, DefaultRootWindow(disp_display), visual, AllocNone);
+		}
+		xswa.background_pixel = bg;
+		xswa.border_pixel = fg;
+		xswa.backing_store = Always;
+		xswa.backing_planes = -1;
+		xswa.bit_gravity = NorthWestGravity;
+		mask = CWBackPixel | CWBorderPixel | CWBackingStore | CWBackingPlanes | CWBitGravity;
+		window = XCreateWindow(disp_display, DefaultRootWindow(disp_display),
+				shint->x, shint->y, shint->width, shint->height,
+				1, dpy_depth, InputOutput, visual, mask, &xswa);
+		disp_window[num].window = window;
+
+		XSelectInput(disp_display, window, event_mask);
+		XSetStandardProperties(disp_display, window, title, title, None, NULL, 0, shint);	/* Tell other applications about this window */
+		XMapWindow(disp_display, window);							/* Map window. */
+		do {											/* Wait for map. */
+			XNextEvent(disp_display, &xev);
+		} while (xev.type!=MapNotify || xev.xmap.event!=window);
+		//XSelectInput(disp_display, window, KeyPressMask);					/*  XSelectInput(display, window, NoEventMask);*/
+	}
+	window = disp_window[num].window;
+	XSetStandardProperties(disp_display, window, title, title, None, NULL, 0, shint);		/* Tell other applications about this window */
+	XResizeWindow(disp_display, window, width, height);
+	XSync(disp_display, 1);
+	XFree(shint);
+}
+
+void disp_sync(void) {
+	XSync(disp_display, 1);
+}
+
+void disp_setcolor(unsigned char *name) {
+	int screen;
+	GC gc;
+	XColor c_exact, c_nearest;
+	Colormap cm;
+	Status st;
+
+	screen = DefaultScreen(disp_display);
+	gc = DefaultGC(disp_display, screen);		/* allocate colors */
+	cm = DefaultColormap(disp_display, screen);
+	st = XAllocNamedColor(disp_display, cm, name, &c_nearest, &c_exact);
+	disp_chkerror(st!=1, "XAllocNamedColor error");
+	XSetForeground(disp_display, gc, c_nearest.pixel);
+}
+
+void disp_gray(int num, char *data, int width, int height, int stride, const unsigned char *tit) {
+	Visual *visual;
+	XImage *ximage;
+	unsigned char *image;
+	int y,x,pixelsize;
+	char dummy;
+	int t = 1;
+	int dpy_depth;
+	int screen;
+	GC gc;
+	//XEvent xev;
+
+	disp_init_display();
+	disp_init_window(num, width, height, tit);
+	screen = DefaultScreen(disp_display);
+	visual = DefaultVisual(disp_display, screen);
+	dpy_depth = DefaultDepth(disp_display, screen);
+	ximage = XCreateImage(disp_display, visual, dpy_depth, ZPixmap, 0, &dummy, width, height, 8, 0);
+	disp_chkerror(!ximage, "no ximage");
+	if (*(char *)&t == 1) {
+		ximage->byte_order = LSBFirst;
+		ximage->bitmap_bit_order = LSBFirst;
+	} else {
+		ximage->byte_order = MSBFirst;
+		ximage->bitmap_bit_order = MSBFirst;
+	}
+	pixelsize = dpy_depth>8 ? sizeof(int) : sizeof(unsigned char);
+	image = malloc(width * height * pixelsize);
+	disp_chkerror(!image, "malloc failed");
+	for (y=0; y<height; y++) for (x=0; x<width; x++) {
+		memset(&image[(width*y + x)*pixelsize], data[y*stride+x], pixelsize);
+	}
+	ximage->data = image;
+	gc = DefaultGC(disp_display, screen);	/* allocate colors */
+
+//	XUnmapWindow(disp_display, disp_window[num].window);							/* Map window. */
+//	XMapWindow(disp_display, disp_window[num].window);							/* Map window. */
+	XPutImage(disp_display, disp_window[num].window, gc, ximage, 0, 0, 0, 0, width, height);
+//		do {											/* Wait for map. */
+//			XNextEvent(disp_display, &xev);
+//		} while (xev.type!=MapNotify || xev.xmap.event!=disp_window[num].window);
+	XPutImage(disp_display, disp_window[num].window, gc, ximage, 0, 0, 0, 0, width, height);
+
+	XDestroyImage(ximage);
+	XSync(disp_display, 1);
+
+}
+
+void disp_gray_zoom(int num, char *data, int width, int height, int stride, const unsigned char *tit, int zoom) {
+	unsigned char *dataz;
+	int y,x,y0,x0;
+	dataz = malloc(width*zoom * height*zoom);
+	disp_chkerror(!dataz, "malloc");
+	for (y=0; y<height; y++) for (x=0; x<width; x++) {
+		for (y0=0; y0<zoom; y0++) for (x0=0; x0<zoom; x0++) {
+			dataz[(y*zoom + y0)*width*zoom + x*zoom + x0] = data[y*stride+x];
+		}
+	}
+	disp_gray(num, dataz, width*zoom, height*zoom, width*zoom, tit);
+	free(dataz);
+}
+
+void disp_point(int num, int x1, int y1) {
+	int screen;
+	GC gc;
+	screen = DefaultScreen(disp_display);
+	gc = DefaultGC(disp_display, screen);		/* allocate colors */
+	XDrawPoint(disp_display, disp_window[num].window, gc, x1, y1);
+//	XSync(disp_display, 1);
+}
+
+void disp_line(int num, int x1, int y1, int x2, int y2) {
+	int screen;
+	GC gc;
+	screen = DefaultScreen(disp_display);
+	gc = DefaultGC(disp_display, screen);		/* allocate colors */
+	XDrawLine(disp_display, disp_window[num].window, gc, x1, y1, x2, y2);
+//	XSync(disp_display, 1);
+}
+
+void disp_rect(int num, int x1, int y1, int x2, int y2) {
+	int screen;
+	GC gc;
+	screen = DefaultScreen(disp_display);
+
+	gc = DefaultGC(disp_display, screen);		/* allocate colors */
+	XDrawRectangle(disp_display, disp_window[num].window, gc, x1, y1, x2-x1, y2-y1);
+//	XSync(disp_display, 1);
+}

common/display.h

+/*****************************************************************************
+ * x264: h264 encoder
+ *****************************************************************************
+ * Copyright (C) 2005 x264 project
+ *
+ * Author: Tuukka Toivonen <tuukkat@ee.oulu.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#ifndef _DISPLAY_H
+#define _DISPLAY_H 1
+
+void disp_sync(void);
+void disp_setcolor(unsigned char *name);
+/* Display a region of byte wide memory as a grayscale image.
+ * num is the window to use for displaying. */
+void disp_gray(int num, char *data, int width, int height,
+               int stride, const unsigned char *title);
+void disp_gray_zoom(int num, char *data, int width, int height,
+               int stride, const unsigned char *title, int zoom);
+void disp_point(int num, int x1, int y1);
+void disp_line(int num, int x1, int y1, int x2, int y2);
+void disp_rect(int num, int x1, int y1, int x2, int y2);
+
+#endif

common/visualize.c

+/*****************************************************************************
+ * x264: h264 encoder
+ *****************************************************************************
+ * Copyright (C) 2005 x264 project
+ *
+ * Author: Tuukka Toivonen <tuukkat@ee.oulu.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+/*
+ * Some explanation of the symbols used:
+ * Red/pink: intra block
+ * Blue: inter block
+ * Green: skip block
+ * Yellow: B-block (not visualized properly yet)
+ *
+ * The intra blocks have generally lines drawn perpendicular
+ * to the prediction direction, so for example, if there is a pink block
+ * with horizontal line at the top of it, it is interpolated by assuming
+ * luma to be vertically constant.
+ * DC predicted blocks have both horizontal and vertical lines,
+ * pink blocks with a diagonal line are predicted using the planar function.
+ */
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#else
+#include <inttypes.h>
+#endif
+#include <stddef.h>                 /* NULL */
+#include <stdio.h>                  /* getchar */
+#include <stdlib.h>                 /* abort */
+
+#include "common.h"
+#include "visualize.h"
+#include "macroblock.h"
+#include "display.h"
+
+typedef struct {
+    int     i_type;
+    int     i_partition;
+    int     i_sub_partition[4];
+    int     i_intra16x16_pred_mode;
+    int     intra4x4_pred_mode[4][4];
+    int8_t  ref[2][4][4];                  /* [list][y][x] */
+    int16_t mv[2][4][4][2];                /* [list][y][x][mvxy] */
+} visualize_t;
+
+/* {{{ [fold] char *get_string(const stringlist_t *sl, int entries, int code) */
+/* Return string from stringlist corresponding to the given code */
+#define GET_STRING(sl, code) get_string((sl), sizeof(sl)/sizeof(*(sl)), code)
+
+typedef struct {
+    int code;
+    char *string;
+} stringlist_t;
+
+static char *get_string(const stringlist_t *sl, int entries, int code)
+{
+    int i;
+
+    for (i=0; i<entries; i++) {
+        if (sl[i].code==code) break;
+    }
+    return (i>=entries) ? "?" : sl[i].string;
+}
+/* }}} */
+/* {{{ [fold] void mv(int x0, int y0, int16_t dmv[2], int zoom, char *col) */
+/* Plot motion vector */
+static void mv(int x0, int y0, int16_t dmv[2], int zoom, char *col)
+{
+    int dx = dmv[0];
+    int dy = dmv[1];
+
+    dx = (dx*zoom)/4;           /* Quarter pixel accurate MVs */
+    dy = (dy*zoom)/4;
+    disp_line(0, x0, y0, x0+dx, y0+dy);
+    disp_setcolor("black");
+    disp_point(0, x0, y0);
+    disp_setcolor(col);
+}
+/* }}} */
+
+/* {{{ [fold] void x264_visualize_init( x264_t *h ) */
+void x264_visualize_init( x264_t *h )
+{
+    int mb = h->sps->i_mb_width * h->sps->i_mb_height;
+    h->visualize = x264_malloc(mb * sizeof(visualize_t));
+}
+/* }}} */
+/* {{{ [fold] void x264_visualize_mb( x264_t *h ) */
+void x264_visualize_mb( x264_t *h )
+{
+    visualize_t *v = (visualize_t*)h->visualize + h->mb.i_mb_xy;
+    int i, l, x, y;
+
+    /* Save all data for the MB what we need for drawing the visualization */
+    v->i_type = h->mb.i_type;
+    v->i_partition = h->mb.i_partition;
+    for (i=0; i<4; i++) v->i_sub_partition[i] = h->mb.i_sub_partition[i];
+    for (y=0; y<4; y++) for (x=0; x<4; x++)
+        v->intra4x4_pred_mode[y][x] = h->mb.cache.intra4x4_pred_mode[X264_SCAN8_0+y*8+x];
+    for (l=0; l<2; l++) for (y=0; y<4; y++) for (x=0; x<4; x++) {
+        for (i=0; i<2; i++) {
+            v->mv[l][y][x][i] = h->mb.cache.mv[l][X264_SCAN8_0+y*8+x][i];
+        }
+        v->ref[l][y][x] = h->mb.cache.ref[i][X264_SCAN8_0+y*8+x];
+    }
+    v->i_intra16x16_pred_mode = h->mb.i_intra16x16_pred_mode;
+}
+/* }}} */
+/* {{{ [fold] void x264_visualize_close( x264_t *h ) */
+void x264_visualize_close( x264_t *h )
+{
+    x264_free(h->visualize);
+}
+/* }}} */
+/* {{{ [fold] void x264_visualize( x264_t *h ) */
+/* Display visualization (block types, MVs) of the encoded frame */
+/* FIXME: B-type MBs not handled yet properly
+ * Reference frame number not visualized */
+void x264_visualize_show( x264_t *h )
+{
+    int mb_xy;
+    static const stringlist_t mb_types[] = {
+        /* Block types marked as NULL will not be drawn */
+        { I_4x4   , "red" },
+        { I_16x16 , "pink" },
+        { I_PCM   , "violet" },
+        { P_L0    , "SlateBlue" },
+        { P_8x8   , "blue" },
+        { P_SKIP  , "green" },
+        { B_DIRECT, "yellow" },
+        { B_L0_L0 , "yellow" },
+        { B_L0_L1 , "yellow" },
+        { B_L0_BI , "yellow" },
+        { B_L1_L0 , "yellow" },
+        { B_L1_L1 , "yellow" },
+        { B_L1_BI , "yellow" },
+        { B_BI_L0 , "yellow" },
+        { B_BI_L1 , "yellow" },
+        { B_BI_BI , "yellow" },
+        { B_8x8   , "yellow" },
+        { B_SKIP  , "yellow" },
+    };
+
+    static const int waitkey = 1;
+    static const int drawbox = 1;
+    static const int borders = 0;
+
+    static const int pad = 32;
+    static const int zoom = 2;
+    uint8_t *const frame = h->fdec->plane[0];
+    const int width = h->param.i_width;
+    const int height = h->param.i_height;
+    const int stride = h->fdec->i_stride[0];
+
+    if (borders) {
+        disp_gray_zoom(0, frame - pad*stride - pad, width+2*pad, height+2*pad, stride, "fdec", zoom);
+    } else {
+        disp_gray_zoom(0, frame, width, height, stride, "fdec", zoom);
+    }
+
+    for( mb_xy = 0; mb_xy < h->sps->i_mb_width * h->sps->i_mb_height; mb_xy++ )
+    {
+        visualize_t *v = (visualize_t*)h->visualize + mb_xy;
+        const int mb_y = mb_xy / h->sps->i_mb_width;
+        const int mb_x = mb_xy % h->sps->i_mb_width;
+        int x = mb_x*16*zoom;
+        int y = mb_y*16*zoom;
+        if (borders) {
+            x += pad*zoom;
+            y += pad*zoom;
+        }
+        int l = 0;
+        char *col = GET_STRING(mb_types, v->i_type);
+        unsigned int i, j;
+        if (col==NULL) continue;
+        disp_setcolor(col);
+        if (drawbox) disp_rect(0, x, y, x+16*zoom-1, y+16*zoom-1);
+
+        if (v->i_type==P_L0 || v->i_type==P_8x8 || v->i_type==P_SKIP) {
+
+            /* Predicted (inter) mode, with motion vector */
+            if (v->i_partition==D_16x16 || v->i_type==P_SKIP) {
+                mv(x+8*zoom, y+8*zoom, v->mv[l][0][0], zoom, col);
+            }
+            if (v->i_partition==D_16x8) {
+                if (drawbox) disp_rect(0, x, y, x+16*zoom, y+8*zoom);
+                mv(x+8*zoom, y+4*zoom, v->mv[l][0][0], zoom, col);
+                if (drawbox) disp_rect(0, x, y+8*zoom, x+16*zoom, y+16*zoom);
+                mv(x+8*zoom, y+12*zoom, v->mv[l][2][0], zoom, col);
+            }
+            if (v->i_partition==D_8x16) {
+                if (drawbox) disp_rect(0, x,          y, x+8*zoom,  y+16*zoom);
+                mv(x+4*zoom, y+8*zoom, v->mv[l][0][0], zoom, col);
+                if (drawbox) disp_rect(0, x+8*zoom,   y, x+16*zoom, y+16*zoom);
+                mv(x+12*zoom, y+8*zoom, v->mv[l][0][2], zoom, col);
+            }
+            if (v->i_partition==D_8x8) {
+                for (i=0; i<2; i++) for (j=0; j<2; j++) {
+                    int sp = v->i_sub_partition[i*2+j];
+                    const int x0 = x + j*8*zoom;
+                    const int y0 = y + i*8*zoom;
+                    if (sp==D_L1_8x8) sp = D_L0_8x8;
+                    if (sp==D_L1_4x8) sp = D_L0_4x8;
+                    if (sp==D_L1_8x4) sp = D_L0_8x4;
+                    if (sp==D_L1_4x4) sp = D_L0_4x4;
+                    if (sp==D_L0_8x8) {
+                        if (drawbox) disp_rect(0, x0, y0, x0+8*zoom, y0+8*zoom);
+                        mv(x0+4*zoom, y0+4*zoom, v->mv[l][2*i][2*j], zoom, col);
+                    }
+                    if (sp==D_L0_8x4) {
+                        if (drawbox) disp_rect(0, x0, y0, x0+8*zoom, y0+4*zoom);
+                        if (drawbox) disp_rect(0, x0, y0+4*zoom, x0+8*zoom, y0+8*zoom);
+                        mv(x0+4*zoom, y0+2*zoom, v->mv[l][2*i][2*j], zoom, col);
+                        mv(x0+4*zoom, y0+6*zoom, v->mv[l][2*i+1][2*j], zoom, col);
+                    }
+                    if (sp==D_L0_4x8) {
+                        if (drawbox) disp_rect(0, x0, y0, x0+4*zoom, y0+8*zoom);
+                        if (drawbox) disp_rect(0, x0+4*zoom, y0, x0+8*zoom, y0+8*zoom);
+                        mv(x0+2*zoom, y0+4*zoom, v->mv[l][2*i][2*j], zoom, col);
+                        mv(x0+6*zoom, y0+4*zoom, v->mv[l][2*i][2*j+1], zoom, col);
+                    }
+                    if (sp==D_L0_4x4) {
+                        if (drawbox) disp_rect(0, x0, y0, x0+4*zoom, y0+4*zoom);
+                        if (drawbox) disp_rect(0, x0+4*zoom, y0, x0+8*zoom, y0+4*zoom);
+                        if (drawbox) disp_rect(0, x0, y0+4*zoom, x0+4*zoom, y0+8*zoom);
+                        if (drawbox) disp_rect(0, x0+4*zoom, y0+4*zoom, x0+8*zoom, y0+8*zoom);
+                        mv(x0+2*zoom, y0+2*zoom, v->mv[l][2*i][2*j], zoom, col);
+                        mv(x0+6*zoom, y0+2*zoom, v->mv[l][2*i][2*j+1], zoom, col);
+                        mv(x0+2*zoom, y0+6*zoom, v->mv[l][2*i+1][2*j], zoom, col);
+                        mv(x0+6*zoom, y0+6*zoom, v->mv[l][2*i+1][2*j+1], zoom, col);
+                    }
+                }
+            }
+        }
+
+        if (v->i_type==I_4x4 || v->i_type==I_16x16 || v->i_type==I_PCM) {
+            /* Intra coded */
+            if (v->i_type==I_16x16) {
+                switch (v->i_intra16x16_pred_mode) {
+                case I_PRED_16x16_V:
+                    disp_line(0, x+2*zoom, y+2*zoom, x+14*zoom, y+2*zoom);
+                    break;
+                case I_PRED_16x16_H:
+                    disp_line(0, x+2*zoom, y+2*zoom, x+2*zoom, y+14*zoom);
+                    break;
+                case I_PRED_16x16_DC:
+                case I_PRED_16x16_DC_LEFT:
+                case I_PRED_16x16_DC_TOP:
+                case I_PRED_16x16_DC_128:
+                    disp_line(0, x+2*zoom, y+2*zoom, x+14*zoom, y+2*zoom);
+                    disp_line(0, x+2*zoom, y+2*zoom, x+2*zoom, y+14*zoom);
+                    break;
+                case I_PRED_16x16_P:
+                    disp_line(0, x+2*zoom, y+2*zoom, x+8*zoom, y+8*zoom);
+                    break;
+                default: abort();
+                }
+            }
+            if (v->i_type==I_4x4) {
+                for (i=0; i<4; i++) for (j=0; j<4; j++) {
+                    const int x0 = x + j*4*zoom;
+                    const int y0 = y + i*4*zoom;
+                    if (drawbox) disp_rect(0, x0, y0, x0+4*zoom, y0+4*zoom);
+                    switch (v->intra4x4_pred_mode[i][j]) {
+                    case I_PRED_4x4_V:		/* Vertical */
+                        disp_line(0, x0+0*zoom, y0+1*zoom, x0+4*zoom, y0+1*zoom);
+                        break;
+                    case I_PRED_4x4_H:		/* Horizontal */
+                        disp_line(0, x0+1*zoom, y0+0*zoom, x0+1*zoom, y0+4*zoom);
+                        break;
+                    case I_PRED_4x4_DC:		/* DC, average from top and left sides */
+                    case I_PRED_4x4_DC_LEFT:
+                    case I_PRED_4x4_DC_TOP:
+                    case I_PRED_4x4_DC_128:
+                        disp_line(0, x0+1*zoom, y0+1*zoom, x0+4*zoom, y0+1*zoom);
+                        disp_line(0, x0+1*zoom, y0+1*zoom, x0+1*zoom, y0+4*zoom);
+                        break;
+                    case I_PRED_4x4_DDL:	/* Topright-downleft */
+                        disp_line(0, x0+0*zoom, y0+0*zoom, x0+4*zoom, y0+4*zoom);
+                        break;
+                    case I_PRED_4x4_DDR:	/* Topleft-downright */
+                        disp_line(0, x0+0*zoom, y0+4*zoom, x0+4*zoom, y0+0*zoom);
+                        break;
+                    case I_PRED_4x4_VR:		/* Mix of topleft-downright and vertical */