lsr_enc.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

		lsr_write_vluimsbf5(lsr, count, "count");
        for (i=0; i<count; i++) {
			u8 *v = (u8 *)gf_list_get(l, i);
			lsr_write_vluimsbf5(lsr, *v, "val");
        }
	}
        break;
    case 8: // floats
	{
		u32 i, count;
		if (svg_type==SVG_StrokeDashArray_datatype) {
			SVG_StrokeDashArray *da = (SVG_StrokeDashArray *)val;
			lsr_write_vluimsbf5(lsr, da->array.count, "count");
			for (i=0; i<da->array.count; i++) {
				lsr_write_fixed_16_8(lsr, da->array.vals[i], "val");
			}
		} else if (svg_type==SVG_ViewBox_datatype) {
			SVG_ViewBox *vb = (SVG_ViewBox *)val;
			lsr_write_vluimsbf5(lsr, 4, "count");
			lsr_write_fixed_16_8(lsr, vb->x, "val");
			lsr_write_fixed_16_8(lsr, vb->y, "val");
			lsr_write_fixed_16_8(lsr, vb->width, "val");
			lsr_write_fixed_16_8(lsr, vb->height, "val");
		} else if (svg_type==SVG_Coordinates_datatype) {
			GF_List *l = *(GF_List **)val;
			count = gf_list_count(l);
			lsr_write_vluimsbf5(lsr, count, "count");
			for (i=0; i<count; i++) {
				SVG_Coordinate *v = (SVG_Coordinate *)gf_list_get(l, i);
				lsr_write_fixed_16_8(lsr, v->value, "val");
			}
		} else if (svg_type==SVG_Transform_Rotate_datatype) {
			Fixed angle;
			SVG_Point_Angle *p = (SVG_Point_Angle *)val;
			count = (p->x || p->y) ? 3 : 1;
			lsr_write_vluimsbf5(lsr, count, "count");
			angle = gf_muldiv(p->angle, INT2FIX(180), GF_PI);
			lsr_write_fixed_16_8(lsr, p->angle, "val");
			if (count==3) {
				lsr_write_fixed_16_8(lsr, p->x, "val");
				lsr_write_fixed_16_8(lsr, p->y, "val");
			}
		} else if (svg_type==SVG_Transform_Scale_datatype) {
			SVG_Point *pt = (SVG_Point *)val;
			count = (pt->x == pt->y) ? 1 : 2;
			lsr_write_vluimsbf5(lsr, count, "count");
			lsr_write_fixed_16_8(lsr, pt->x, "val");
			if (count==2) lsr_write_fixed_16_8(lsr, pt->y, "val");
		} else {
			GF_List *l = *(GF_List **)val;
			count = gf_list_count(l);
			lsr_write_vluimsbf5(lsr, count, "count");
			for (i=0; i<count; i++) {
				Fixed *v = (Fixed *)gf_list_get(l, i);
				lsr_write_fixed_16_8(lsr, *v, "val");
			}
		}
	}
        break;
    case 9: // point
		if (svg_type==SVG_Motion_datatype) {
			lsr_write_coordinate(lsr, ((GF_Matrix2D*)val)->m[2], 0, "valX");
			lsr_write_coordinate(lsr, ((GF_Matrix2D*)val)->m[5], 0, "valY");
		} else {
			lsr_write_coordinate(lsr, ((SVG_Point *)val)->x, 0, "valX");
			lsr_write_coordinate(lsr, ((SVG_Point *)val)->y, 0, "valY");
		}
        break;
    default:
		lsr_write_extension(lsr, NULL, 0, name);
        break;
    }
}

static void lsr_write_anim_value(GF_LASeRCodec *lsr, SMIL_AnimateValue *val, const char *name)
{
	if (!val || !val->type) {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
	} else {
		u32 type = svg_type_to_lsr_anim(val->type, 0, NULL, val->value);
		if (type==255) {
			GF_LOG(GF_LOG_WARNING, GF_LOG_CODING, ("[LASeR] unsupported anim type %d - skipping\n", val->type ));
			GF_LSR_WRITE_INT(lsr, 0, 1, name);
		} else {
			GF_LSR_WRITE_INT(lsr, 1, 1, name);
			GF_LSR_WRITE_INT(lsr, type, 4, "type");
			lsr_write_an_anim_value(lsr, val->value, type, val->type, 0, name);
		}
	}
}

static void lsr_write_anim_values(GF_LASeRCodec *lsr, SMIL_AnimateValues *anims, const char *name)
{
	u32 type, i, count = 0;
	if (anims && anims->type) count = gf_list_count(anims->values);

	if (!count) {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
		return;
	}
	type = svg_type_to_lsr_anim(anims->type, 0, anims->values, NULL);
	if (type==255) {
		GF_LOG(GF_LOG_WARNING, GF_LOG_CODING, ("[LASeR] unsupported anim type %d - skipping\n", anims->type ));
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
	} else {
		GF_LSR_WRITE_INT(lsr, 1, 1, name);
		GF_LSR_WRITE_INT(lsr, type, 4, "type");
		lsr_write_vluimsbf5(lsr, count, "count");
		for (i=0; i<count; i++) {
			void *att = gf_list_get(anims->values, i);
			lsr_write_an_anim_value(lsr, att, type, anims->type, 0, "a_value");
		}
	}
}

static void lsr_write_fraction_12(GF_LASeRCodec *lsr, GF_List **l, const char *name)
{
	u32 i, count;
	count = l ? gf_list_count(*l) : 0;
	if (!count) {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
		return;
	}
	GF_LSR_WRITE_INT(lsr, 1, 1, name);
	lsr_write_vluimsbf5(lsr, count, "name");
	for (i=0; i<count; i++) {
		Fixed f = * (Fixed *) gf_list_get(*l, i);
		if (!f || (f == FIX_ONE)) {
			GF_LSR_WRITE_INT(lsr, 1, 1, "hasShort");
			GF_LSR_WRITE_INT(lsr, f ? 0 : 1, 1, "isZero");
		} else {
			u32 ft = (u32) ( FIX2FLT(f) * 4096/*(1<<12)*/ );
			GF_LSR_WRITE_INT(lsr, 0, 1, "hasShort");
			GF_LSR_WRITE_INT(lsr, ft, 12, "val");
		}
	}
}
static void lsr_write_float_list(GF_LASeRCodec *lsr, GF_List **l, const char *name)
{
	u32 i, count = l ? gf_list_count(*l) : 0;
	if (!count) {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
		return;
	}
	GF_LSR_WRITE_INT(lsr, 1, 1, name);
	lsr_write_vluimsbf5(lsr, count, "count");
	for (i=0;i<count;i++) {
		Fixed *v = (Fixed *)gf_list_get(*l, i);
		lsr_write_fixed_16_8(lsr, *v, "val");
	}
}

static u32 lsr_get_bit_size(GF_LASeRCodec *lsr, Fixed v) 
{
	u32 val;
	v = gf_divfix(v, lsr->res_factor);
	val = (v<0) ? FIX2INT(-v) : FIX2INT(v);
	return 1 + gf_get_bit_size(val);
}

static void lsr_write_point_sequence(GF_LASeRCodec *lsr, GF_List **pts, const char *name)
{
	u32 i, count = pts ? gf_list_count(*pts) : 0;
	lsr_write_vluimsbf5(lsr, count, "nbPoints");
	if (!count) return;
	/*TODO golomb coding*/
	GF_LSR_WRITE_INT(lsr, 0, 1, "flag");
    if (1) {
        if (count < 3) {
			u32 nb_bits = 0;
			for (i=0; i<count; i++) {
				u32 k;
				SVG_Point *pt = (SVG_Point *)gf_list_get(*pts, i);
				k = lsr_get_bit_size(lsr, pt->x); if (k>nb_bits) nb_bits = k;
				k = lsr_get_bit_size(lsr, pt->y); if (k>nb_bits) nb_bits = k;
			}

			GF_LSR_WRITE_INT(lsr, nb_bits, 5, "bits");
            for (i=0; i<count; i++) {
				SVG_Point *pt = (SVG_Point *)gf_list_get(*pts, i);
				u32 v = lsr_translate_coords(lsr, pt->x, nb_bits);
				GF_LSR_WRITE_INT(lsr, v, nb_bits, "x");
				v = lsr_translate_coords(lsr, pt->y, nb_bits);
				GF_LSR_WRITE_INT(lsr, v, nb_bits, "y");
            }
        } else {
			Fixed c_x, c_y;
			u32 k, nb_dx, nb_dy;
			SVG_Point *pt = (SVG_Point *)gf_list_get(*pts, 0);
			nb_dx = 0;
			k = lsr_get_bit_size(lsr, pt->x); if (k>nb_dx) nb_dx = k;
			k = lsr_get_bit_size(lsr, pt->y); if (k>nb_dx) nb_dx = k;
			GF_LSR_WRITE_INT(lsr, nb_dx, 5, "bits");
			k = lsr_translate_coords(lsr, pt->x, nb_dx);
			GF_LSR_WRITE_INT(lsr, k, nb_dx, "x");
			k = lsr_translate_coords(lsr, pt->y, nb_dx);
			GF_LSR_WRITE_INT(lsr, k, nb_dx, "y");
			c_x = pt->x;
			c_y = pt->y;
			nb_dx = nb_dy = 0;
			for (i=1; i<count; i++) {
				SVG_Point *pt = (SVG_Point *)gf_list_get(*pts, i);
				k = lsr_get_bit_size(lsr, pt->x - c_x); if (k>nb_dx) nb_dx = k;
				k = lsr_get_bit_size(lsr, pt->y - c_y); if (k>nb_dy) nb_dy = k;
				c_x = pt->x;
				c_y = pt->y;
			}
			GF_LSR_WRITE_INT(lsr, nb_dx, 5, "bitsx");
			GF_LSR_WRITE_INT(lsr, nb_dy, 5, "bitsy");
			c_x = pt->x;
			c_y = pt->y;
			for (i=1; i<count; i++) {
				SVG_Point *pt = (SVG_Point *)gf_list_get(*pts, i);
				k = lsr_translate_coords(lsr, pt->x - c_x, nb_dx);
				GF_LSR_WRITE_INT(lsr, k, nb_dx, "dx");
				k = lsr_translate_coords(lsr, pt->y - c_y, nb_dy);
				GF_LSR_WRITE_INT(lsr, k, nb_dy, "dy");
				c_x = pt->x;
				c_y = pt->y;
			}
        }
	}
}
static void lsr_write_path_type(GF_LASeRCodec *lsr, SVG_PathData *path, const char *name)
{
#if USE_GF_PATH    
	u32 i, *contour, nb_types;
	GF_List *pts = gf_list_new();

	contour = path->contours;
	nb_types = 0;
	for (i=0; i<path->n_points; ) {
		switch (path->tags[i]) {
		case GF_PATH_CURVE_ON:
			gf_list_add(pts, &path->points[i]);
			nb_types++;
			i++;
			break;
		case GF_PATH_CLOSE:
			nb_types++;
			i++;
			break;
		case GF_PATH_CURVE_CONIC:
			gf_list_add(pts, &path->points[i]);
			gf_list_add(pts, &path->points[i+1]);
			i+=2;
			nb_types++;
			break;
		case GF_PATH_CURVE_CUBIC:
			gf_list_add(pts, &path->points[i]);
			gf_list_add(pts, &path->points[i+1]);
			gf_list_add(pts, &path->points[i+2]);
			i+=3;
			nb_types++;
			break;
		}
	}
	lsr_write_point_sequence(lsr, &pts, "seq");
	gf_list_del(pts);
	/*first moveTo is skiped*/
	lsr_write_vluimsbf5(lsr, nb_types-1, "nbOfTypes");
	for (i=0; i<path->n_points; ) {
		switch (path->tags[i]) {
		case GF_PATH_CLOSE:
			/*close*/
			GF_LSR_WRITE_INT(lsr, LSR_PATH_COM_Z, 5, name);
			i++;
			break;
		case GF_PATH_CURVE_ON:
			if (!i) {
			} else if (*contour == i-1) {
				/*moveTo*/
				GF_LSR_WRITE_INT(lsr, LSR_PATH_COM_M, 5, name);
			} else {
				/*lineTo*/
				GF_LSR_WRITE_INT(lsr, LSR_PATH_COM_L, 5, name);
			}
			i++;
			break;
		case GF_PATH_CURVE_CONIC:
			/*Conic*/
			GF_LSR_WRITE_INT(lsr, LSR_PATH_COM_Q, 5, name);
			i+=2;
			break;
		case GF_PATH_CURVE_CUBIC:
			/*cubic*/
			GF_LSR_WRITE_INT(lsr, LSR_PATH_COM_C, 5, name);
			i+=3;
			break;
		}
	}
#else
	u32 i, count;
	lsr_write_point_sequence(lsr, path->points, "seq");
	/*initial move is not coded*/
	count = gf_list_count(path->commands);
    lsr_write_vluimsbf5(lsr, count, "nbOfTypes");
    for (i; i<count; i++) {
        u8 type = *(u8 *) gf_list_get(path->commands, i);
		GF_LSR_WRITE_INT(lsr, type, 5, name);
    }
#endif
}

static void lsr_write_rotate_type(GF_LASeRCodec *lsr, SVG_Rotate *rotate, const char *name)
{
	GF_LSR_WRITE_INT(lsr, rotate ? 1 : 0, 1, name);
	if (!rotate) return;

	if ((rotate->type == SVG_NUMBER_AUTO) || (rotate->type == SVG_NUMBER_AUTO_REVERSE)) {
		GF_LSR_WRITE_INT(lsr, 1, 1, "choice");
		GF_LSR_WRITE_INT(lsr, (rotate->type == SVG_NUMBER_AUTO) ? 0 : 1, 1, "rotate");
	} else {
		GF_LSR_WRITE_INT(lsr, 0, 1, "choice");
		lsr_write_fixed_16_8(lsr, rotate->value, "rotate");
	}
}
static void lsr_write_sync_behavior(GF_LASeRCodec *lsr, SMIL_SyncBehavior *sync, const char *name)
{
	GF_LSR_WRITE_INT(lsr, sync ? 1 : 0, 1, name);
	if (!sync) return;
	assert(*sync!=SMIL_SYNCBEHAVIOR_INHERIT);
	GF_LSR_WRITE_INT(lsr, *sync-1, 2, name);
}
static void lsr_write_sync_tolerance(GF_LASeRCodec *lsr, SMIL_SyncTolerance *sync, const char *name)
{
	GF_LSR_WRITE_INT(lsr, sync ? 1 : 0, 1, name);
	if (!sync) return;
	assert(sync->type!=SMIL_SYNCTOLERANCE_INHERIT);

	if (sync->type==SMIL_SYNCTOLERANCE_DEFAULT) {
		GF_LSR_WRITE_INT(lsr, 1, 1, name);
	} else {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
		lsr_write_vluimsbf5(lsr, (u32) (sync->value*lsr->time_resolution), "value");
	}
}
static void lsr_write_coord_list(GF_LASeRCodec *lsr, GF_List **coords, const char *name)
{
	u32 i, count = coords ? gf_list_count(*coords) : 0;
	if (!count) {
		GF_LSR_WRITE_INT(lsr, 0, 1, name);
	} else {
		GF_LSR_WRITE_INT(lsr, 1, 1, name);
	    lsr_write_vluimsbf5(lsr, count, "nb_coords");
		for (i=0; i<count; i++) {
			SVG_Coordinate *c = (SVG_Coordinate *)gf_list_get(*coords, i);
			u32 res = lsr_translate_coords(lsr, c->value, lsr->coord_bits);
			GF_LSR_WRITE_INT(lsr, res, lsr->coord_bits, name);
		}
	}
}

static void lsr_write_transform_behavior(GF_LASeRCodec *lsr, SVG_TransformBehavior *type)
{
	GF_LSR_WRITE_INT(lsr, type ? 1 : 0, 1, "hasTransformBehavior");
	if (!type) return;
	GF_LSR_WRITE_INT(lsr, *type, 4, "transformBehavior");
}

static void lsr_write_gradient_units(GF_LASeRCodec *lsr, SVG_GradientUnit *type)
{
	GF_LSR_WRITE_INT(lsr, type ? 1 : 0, 1, "hasGradientUnits");
	if (!type) return;
	GF_LSR_WRITE_INT(lsr, *type ? 1 : 0, 1, "gradientUnits");
}

static void lsr_write_content_type(GF_LASeRCodec *lsr, SVG_String *type, const char *name)
{
	if (type) {
		GF_LSR_WRITE_INT(lsr, 1, 1, "hasType");
		lsr_write_byte_align_string(lsr, *type, "type");
	} else {
		GF_LSR_WRITE_INT(lsr, 0, 1, "hasType");
	}
}
static void lsr_write_script_type(GF_LASeRCodec *lsr, SVG_String *type)
{
	GF_LSR_WRITE_INT(lsr, type ? 1 : 0, 1, "hasType");
	if (!type) return;
	if (!strcmp(*type, "application/ecmascript")) {
		GF_LSR_WRITE_INT(lsr, 1, 1, "choice");
		GF_LSR_WRITE_INT(lsr, 0, 1, "script");
	} else if (!strcmp(*type,