sub.c

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#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>

#include "config.h"
#ifdef HAVE_MALLOC_H
#include <uclib.h>
#endif

#ifdef USE_DVDNAV
#include "stream/stream.h"
#include "stream/stream_dvdnav.h"
#define OSD_NAV_BOX_ALPHA 0x7f
#endif

#ifdef HAVE_TV_TELETEXT
#include "stream/tv.h"
#include "osdep/timer.h"
#endif

#include "mplayer.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "video_out.h"
#include "font_load.h"
#include "sub.h"
#include "spudec.h"
#include "libavutil/common.h"

#define NEW_SPLITTING


// Structures needed for the new splitting algorithm.
// osd_text_t contains the single subtitle word.
// osd_text_p is used to mark the lines of subtitles
struct osd_text_t {
    int osd_kerning, //kerning with the previous word
	osd_length,  //orizontal length inside the bbox
	text_length, //number of characters
	*text;       //characters
    struct osd_text_t *prev,
                      *next;
};

struct osd_text_p {
    int  value;
    struct osd_text_t *ott;
    struct osd_text_p *prev,
                      *next;
};
//^

char * sub_osd_names[]={
    MSGTR_VO_SUB_Seekbar,
    MSGTR_VO_SUB_Play,
    MSGTR_VO_SUB_Pause,
    MSGTR_VO_SUB_Stop,
    MSGTR_VO_SUB_Rewind,
    MSGTR_VO_SUB_Forward,
    MSGTR_VO_SUB_Clock,
    MSGTR_VO_SUB_Contrast,
    MSGTR_VO_SUB_Saturation,
    MSGTR_VO_SUB_Volume,
    MSGTR_VO_SUB_Brightness,
    MSGTR_VO_SUB_Hue,
    MSGTR_VO_SUB_Balance
};
char * sub_osd_names_short[] ={ "", "|>", "||", "[]", "<<" , ">>", "", "", "", "", "", "", "" };

//static int vo_font_loaded=-1;
font_desc_t* vo_font=NULL;
font_desc_t* sub_font=NULL;

unsigned char* vo_osd_text=NULL;
#ifdef HAVE_TV_TELETEXT
void* vo_osd_teletext_page=NULL;
int vo_osd_teletext_half = 0;
int vo_osd_teletext_mode=0;
int vo_osd_teletext_format=0;
int vo_osd_teletext_scale=0;
#endif
int sub_unicode=0;
int sub_utf8=0;
int sub_pos=100;
int sub_width_p=100;
int sub_alignment=2; /* 0=top, 1=center, 2=bottom */
int sub_visibility=1;
int sub_bg_color=0; /* subtitles background color */
int sub_bg_alpha=0;
int sub_justify=0;
#ifdef USE_DVDNAV
static nav_highlight_t nav_hl;
#endif

// return the real height of a char:
static inline int get_height(int c,int h){
    int font;
    if ((font=vo_font->font[c])>=0)
	if(h<vo_font->pic_a[font]->h) h=vo_font->pic_a[font]->h;
    return h;
}

// renders char to a big per-object buffer where alpha and bitmap are separated
static void draw_alpha_buf(mp_osd_obj_t* obj, int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)
{
    int dststride = obj->stride;
    int dstskip = obj->stride-w;
    int srcskip = stride-w;
    int i, j;
    unsigned char *b = obj->bitmap_buffer + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *a = obj->alpha_buffer  + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *bs = src;
    unsigned char *as = srca;

    if (x0 < obj->bbox.x1 || x0+w > obj->bbox.x2 || y0 < obj->bbox.y1 || y0+h > obj->bbox.y2) {
	fprintf(stderr, "osd text out of range: bbox [%d %d %d %d], txt [%d %d %d %d]\n",
		obj->bbox.x1, obj->bbox.x2, obj->bbox.y1, obj->bbox.y2,
		x0, x0+w, y0, y0+h);
	return;
    }
    
    for (i = 0; i < h; i++) {
	for (j = 0; j < w; j++, b++, a++, bs++, as++) {
	    if (*b < *bs) *b = *bs;
	    if (*as) {
		if (*a == 0 || *a > *as) *a = *as;
	    }
	}
	b+= dstskip;
	a+= dstskip;
	bs+= srcskip;
	as+= srcskip;
    }
}

// allocates/enlarges the alpha/bitmap buffer
static void alloc_buf(mp_osd_obj_t* obj)
{
    int len;
    if (obj->bbox.x2 < obj->bbox.x1) obj->bbox.x2 = obj->bbox.x1;
    if (obj->bbox.y2 < obj->bbox.y1) obj->bbox.y2 = obj->bbox.y1;
    obj->stride = ((obj->bbox.x2-obj->bbox.x1)+7)&(~7);
    len = obj->stride*(obj->bbox.y2-obj->bbox.y1);
    if (obj->allocated<len) {
	obj->allocated = len;
	free(obj->bitmap_buffer);
	free(obj->alpha_buffer);
	obj->bitmap_buffer = (unsigned char *)memalign(32, len);
	obj->alpha_buffer = (unsigned char *)memalign(32, len);
    }
    memset(obj->bitmap_buffer, sub_bg_color, len);
    memset(obj->alpha_buffer, sub_bg_alpha, len);
}

// renders the buffer
inline static void vo_draw_text_from_buffer(mp_osd_obj_t* obj,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
    if (obj->allocated > 0) {
	draw_alpha(obj->bbox.x1,obj->bbox.y1,
		   obj->bbox.x2-obj->bbox.x1,
		   obj->bbox.y2-obj->bbox.y1,
		   obj->bitmap_buffer,
		   obj->alpha_buffer,
		   obj->stride);
    }
}

unsigned utf8_get_char(const char **str) {
  const uint8_t *strp = (const uint8_t *)*str;
  unsigned c;
  GET_UTF8(c, *strp++, goto no_utf8;);
  *str = (const char *)strp;
  return c;

no_utf8:
  strp = (const uint8_t *)*str;
  c = *strp++;
  *str = (const char *)strp;
  return c;
}

inline static void vo_update_text_osd(mp_osd_obj_t* obj,int dxs,int dys){
	const char *cp=vo_osd_text;
	int x=20;
	int h=0;
	int font;

        obj->bbox.x1=obj->x=x;
        obj->bbox.y1=obj->y=10;

        while (*cp){
          uint16_t c=utf8_get_char(&cp);
	  render_one_glyph(vo_font, c);
	  x+=vo_font->width[c]+vo_font->charspace;
	  h=get_height(c,h);
        }
	
	obj->bbox.x2=x-vo_font->charspace;
	obj->bbox.y2=obj->bbox.y1+h;
	obj->flags|=OSDFLAG_BBOX;

	alloc_buf(obj);

	cp=vo_osd_text;
	x = obj->x;
        while (*cp){
          uint16_t c=utf8_get_char(&cp);
          if ((font=vo_font->font[c])>=0)
            draw_alpha_buf(obj,x,obj->y,
			   vo_font->width[c],
			   vo_font->pic_a[font]->h,
			   vo_font->pic_b[font]->bmp+vo_font->start[c],
			   vo_font->pic_a[font]->bmp+vo_font->start[c],
			   vo_font->pic_a[font]->w);
          x+=vo_font->width[c]+vo_font->charspace;
        }
}

#ifdef USE_DVDNAV
void osd_set_nav_box (uint16_t sx, uint16_t sy, uint16_t ex, uint16_t ey) {
  nav_hl.sx = sx;
  nav_hl.sy = sy;
  nav_hl.ex = ex;
  nav_hl.ey = ey;
}

inline static void vo_update_nav (mp_osd_obj_t *obj, int dxs, int dys) {
  int len;

  obj->bbox.x1 = obj->x = nav_hl.sx;
  obj->bbox.y1 = obj->y = nav_hl.sy;
  obj->bbox.x2 = nav_hl.ex;
  obj->bbox.y2 = nav_hl.ey;
  
  alloc_buf (obj);
  len = obj->stride * (obj->bbox.y2 - obj->bbox.y1);
  memset (obj->bitmap_buffer, OSD_NAV_BOX_ALPHA, len);
  memset (obj->alpha_buffer, OSD_NAV_BOX_ALPHA, len);
  obj->flags |= OSDFLAG_BBOX | OSDFLAG_CHANGED;
  if (obj->bbox.y2 > obj->bbox.y1 && obj->bbox.x2 > obj->bbox.x1)
    obj->flags |= OSDFLAG_VISIBLE;
}
#endif

#ifdef HAVE_TV_TELETEXT
// renders char to a big per-object buffer where alpha and bitmap are separated
static void tt_draw_alpha_buf(mp_osd_obj_t* obj, int x0,int y0, int w,int h, unsigned char* src, int stride,int fg,int bg,int alpha)
{
    int dststride = obj->stride;
    int dstskip = obj->stride-w;
    int srcskip = stride-w;
    int i, j;
    unsigned char *b = obj->bitmap_buffer + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *a = obj->alpha_buffer  + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *bs = src;
    if (x0 < obj->bbox.x1 || x0+w > obj->bbox.x2 || y0 < obj->bbox.y1 || y0+h > obj->bbox.y2) {
	mp_msg(MSGT_OSD,MSGL_ERR,"tt osd text out of range: bbox [%d %d %d %d], txt [%d %d %d %d]\n",
		obj->bbox.x1, obj->bbox.x2, obj->bbox.y1, obj->bbox.y2,
		x0, x0+w, y0, y0+h);
	return;
    }
    for (i = 0; i < h; i++) {
	for (j = 0; j < w; j++, b++, a++, bs++) {
            *b=(fg-bg)*(*bs)/255+bg;
            *a=alpha;
	}
	b+= dstskip;
	a+= dstskip;
	bs+= srcskip;
    }
}
inline static void vo_update_text_teletext(mp_osd_obj_t *obj, int dxs, int dys)
{
    int h=0,w=0,i,j,font,flashon;
    int wm,hm;
    int color;
    int x,y,x0,y0;
    int cols,rows;
    int wm12;
    int hm13;
    int hm23;
    int start_row,max_rows;
    int b,ax[6],ay[6],aw[6],ah[6];
    tt_char tc;
    tt_char* tdp=vo_osd_teletext_page;
    unsigned char colors[8]={1,85,150,226,70,105,179,254};
    unsigned char* buf[9];

    obj->flags|=OSDFLAG_CHANGED|OSDFLAG_VISIBLE;
    if (!tdp || !vo_osd_teletext_mode) {
        obj->flags&=~OSDFLAG_VISIBLE;
        return;
    }
    flashon=(GetTimer()/1000000)%2;
    switch(vo_osd_teletext_half){
    case TT_ZOOM_TOP_HALF:
        start_row=0;
        max_rows=VBI_ROWS/2;
        break;
    case TT_ZOOM_BOTTOM_HALF:
        start_row=VBI_ROWS/2;
        max_rows=VBI_ROWS/2;
        break;
    default:
        start_row=0;
        max_rows=VBI_ROWS;
        break;
    }
    wm=0;
    for(i=start_row;i<max_rows;i++){
        for(j=0;j<VBI_COLUMNS;j++){
            tc=tdp[i*VBI_COLUMNS+j];
            if(!tc.ctl && !tc.gfx)
            {
                render_one_glyph(vo_font, tc.unicode);
                if (wm<vo_font->width[tc.unicode])
                    wm=vo_font->width[tc.unicode];
            }
        }
    }

    hm=vo_font->height+1;
    wm=dxs*hm*max_rows/(dys*VBI_COLUMNS);

    //very simple teletext font auto scaling
    if(!vo_osd_teletext_scale && hm*(max_rows+1)>dys){
        text_font_scale_factor*=1.0*(dys)/((max_rows+1)*hm);
        force_load_font=1;
        vo_osd_teletext_scale=text_font_scale_factor;
        obj->flags&=~OSDFLAG_VISIBLE;
        return;
    }

    cols=dxs/wm;
    rows=dys/hm;

    if(cols>VBI_COLUMNS)
        cols=VBI_COLUMNS;
    if(rows>max_rows)
        rows=max_rows;
    w=cols*wm-vo_font->charspace;
    h=rows*hm-vo_font->charspace;

    if(w<dxs)
        x0=(dxs-w)/2;
    else
        x0=0;
    if(h<dys)
        y0=(dys-h)/2;
    else
        y0=0;

    wm12=wm>>1;
    hm13=(hm+1)/3;
    hm23=hm13<<1;

    for(i=0;i<6;i+=2){
        ax[i+0]=0;
        aw[i+0]=wm12;

        ax[i+1]=wm12;
        aw[i+1]=wm-wm12;
    }

    for(i=0;i<2;i++){
        ay[i+0]=0;
        ah[i+0]=hm13;

        ay[i+2]=hm13;
        ah[i+2]=hm-hm23;

        ay[i+4]=hm-hm13;
        ah[i+4]=hm13;
    }

    obj->x = 0;
    obj->y = 0;
    obj->bbox.x1 = x0;
    obj->bbox.y1 = y0;
    obj->bbox.x2 = x0+w;
    obj->bbox.y2 = y0+h;
    obj->flags |= OSDFLAG_BBOX;
    alloc_buf(obj);

    for(i=0;i<9;i++)
        buf[i]=malloc(wm*hm);

    //alpha
    if(vo_osd_teletext_format==TT_FORMAT_OPAQUE ||vo_osd_teletext_format==TT_FORMAT_OPAQUE_INV)
        color=1;
    else
        color=200;
    memset(buf[8],color,wm*hm);
    //colors
    if(vo_osd_teletext_format==TT_FORMAT_OPAQUE ||vo_osd_teletext_format==TT_FORMAT_TRANSPARENT){
        for(i=0;i<8;i++){
            memset(buf[i],(unsigned char)(1.0*(255-color)*colors[i]/255),wm*hm);
        }
    }else{
        for(i=0;i<8;i++)
            memset(buf[i],(unsigned char)(1.0*(255-color)*colors[7-i]/255),wm*hm);
    }

    y=y0;
    for(i=0;i<rows;i++){
        x=x0;
        for(j=0;j<cols;j++){
            tc=tdp[(i+start_row)*VBI_COLUMNS+j];
            if (tc.hidden) { x+=wm; continue;}
            if(!tc.gfx || (tc.flh && !flashon)){
                /* Rendering one text character */
                draw_alpha_buf(obj,x,y,wm,hm,buf[tc.bg],buf[8],wm);
                if(tc.unicode!=0x20 && tc.unicode!=0x00 && !tc.ctl &&
                    (!tc.flh || flashon) &&
                    (font=vo_font->font[tc.unicode])>=0 && y+hm<dys){
                        tt_draw_alpha_buf(obj,x,y,vo_font->width[tc.unicode],vo_font->height,
                            vo_font->pic_b[font]->bmp+vo_font->start[tc.unicode]-vo_font->charspace*vo_font->pic_a[font]->w,
                            vo_font->pic_b[font]->w,
			    buf[tc.fg][0],buf[tc.bg][0],buf[8][0]);
                }
            }else{
/*
Rendering one graphics character
TODO: support for separated graphics symbols (where six rectangles does not touch each other)

    +--+    +--+    87654321
    |01|    |12|    --------
    |10| <= |34| <= 00100110 <= 0x26
    |01|    |56|
    +--+    +--+