static int OpenFilter ( vlc_object_t * );
static void CloseFilter( vlc_object_t * );
-/* TODO i_alpha support for BlendR16 */
-/* YUVA */
static void Blend( filter_t *, picture_t *, picture_t *, picture_t *,
int, int, int );
+
+/* TODO i_alpha support for BlendR16 */
+/* YUVA */
static void BlendI420( filter_t *, picture_t *, picture_t *, picture_t *,
int, int, int, int, int );
static void BlendR16( filter_t *, picture_t *, picture_t *, picture_t *,
/* RGBA */
static void BlendRGBAI420( filter_t *, picture_t *, picture_t *, picture_t *,
int, int, int, int, int );
+static void BlendRGBAR16( filter_t *, picture_t *, picture_t *, picture_t *,
+ int, int, int, int, int );
static void BlendRGBAR24( filter_t *, picture_t *, picture_t *, picture_t *,
int, int, int, int, int );
( ( in_chroma != VLC_FOURCC('R','G','B','A') ) ||
( out_chroma != VLC_FOURCC('I','4','2','0') &&
out_chroma != VLC_FOURCC('Y','V','1','2') &&
+ out_chroma != VLC_FOURCC('R','V','1','6') &&
out_chroma != VLC_FOURCC('R','V','2','4') &&
out_chroma != VLC_FOURCC('R','V','3','2' ) ) )
)
if( i_width <= 0 || i_height <= 0 ) return;
+#if 0
+ printf( "chroma: %4.4s -> %4.4s\n",
+ (char *)&p_filter->fmt_in.video.i_chroma,
+ (char *)&p_filter->fmt_out.video.i_chroma );
+#endif
+
switch( p_filter->fmt_in.video.i_chroma )
{
case VLC_FOURCC('Y','U','V','A'):
i_x_offset, i_y_offset,
i_width, i_height, i_alpha );
return;
+ case VLC_FOURCC('R','V','1','6'):
+ BlendRGBAR16( p_filter, p_dst, p_dst_orig, p_src,
+ i_x_offset, i_y_offset,
+ i_width, i_height, i_alpha );
+ return;
}
}
- msg_Dbg( p_filter, "no matching alpha blending routine" );
+ msg_Dbg( p_filter, "no matching alpha blending routine "
+ "(chroma: %4.4s -> %4.4s)",
+ (char *)&p_filter->fmt_in.video.i_chroma,
+ (char *)&p_filter->fmt_out.video.i_chroma );
}
/***********************************************************************
return;
}
-static void BlendRGBAR24( filter_t *p_filter, picture_t *p_dst_pic,
+static void BlendRGBAR16( filter_t *p_filter, picture_t *p_dst_pic,
picture_t *p_dst_orig, picture_t *p_src,
int i_x_offset, int i_y_offset,
int i_width, int i_height, int i_alpha )
return;
}
+
+static void BlendRGBAR24( filter_t *p_filter, picture_t *p_dst_pic,
+ picture_t *p_dst_orig, picture_t *p_src,
+ int i_x_offset, int i_y_offset,
+ int i_width, int i_height, int i_alpha )
+{
+ int i_src1_pitch, i_src2_pitch, i_dst_pitch;
+ uint8_t *p_dst, *p_src1, *p_src2;
+ int i_x, i_y, i_pix_pitch, i_trans, i_src_pix_pitch;
+ uint16_t i_pix;
+
+ i_pix_pitch = p_dst_pic->p->i_pixel_pitch;
+ i_dst_pitch = p_dst_pic->p->i_pitch;
+ p_dst = p_dst_pic->p->p_pixels + i_x_offset * i_pix_pitch +
+ p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
+ p_dst_pic->p->i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+
+ i_src1_pitch = p_dst_orig->p->i_pitch;
+ p_src1 = p_dst_orig->p->p_pixels + i_x_offset * i_pix_pitch +
+ p_filter->fmt_out.video.i_x_offset * i_pix_pitch +
+ p_dst_orig->p->i_pitch *
+ ( i_y_offset + p_filter->fmt_out.video.i_y_offset );
+
+ i_src_pix_pitch = p_src->p->i_pixel_pitch;
+ i_src2_pitch = p_src->p->i_pitch;
+ p_src2 = p_src->p->p_pixels +
+ p_filter->fmt_in.video.i_x_offset * i_pix_pitch +
+ p_src->p->i_pitch * p_filter->fmt_in.video.i_y_offset;
+
+#define MAX_TRANS 255
+#define TRANS_BITS 8
+
+ /* Draw until we reach the bottom of the subtitle */
+ for( i_y = 0; i_y < i_height; i_y++,
+ p_dst += i_dst_pitch, p_src1 += i_src1_pitch, p_src2 += i_src2_pitch )
+ {
+ /* Draw until we reach the end of the line */
+ for( i_x = 0; i_x < i_width; i_x++ )
+ {
+#define R ( p_src2[i_x * i_src_pix_pitch + 0] )
+#define G ( p_src2[i_x * i_src_pix_pitch + 1] )
+#define B ( p_src2[i_x * i_src_pix_pitch + 2] )
+ i_trans = ( p_src2[i_x * i_src_pix_pitch + 3] * i_alpha ) / 255;
+ if( !i_trans )
+ {
+ /* Completely transparent. Don't change pixel */
+ continue;
+ }
+ else if( i_trans == MAX_TRANS )
+ {
+ /* Completely opaque. Completely overwrite underlying pixel */
+ *((uint16_t *)(&p_dst[i_x * i_pix_pitch])) = ((R >> 3) << 11) | ((G >> 2) << 5) | (B >> 3);
+ continue;
+ }
+
+ /* Blending */
+ i_pix = *((uint16_t *)(&p_dst[i_x * i_pix_pitch]));
+ *((uint16_t *)(&p_dst[i_x * i_pix_pitch])) =
+ ( ( ( (R >> 3)*i_trans
+ + (i_pix >> 11) * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS ) << 11 )
+ | ( ( ( (G >> 2)*i_trans
+ + ((i_pix & 0x07e0)>> 5) * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS ) << 5 )
+ | ( ( ( (B >> 3)*i_trans
+ + (i_pix & 0x001f) * (MAX_TRANS - i_trans) )
+ >> TRANS_BITS ) );
+#undef R
+#undef G
+#undef B
+ }
+ }
+
+#undef MAX_TRANS
+#undef TRANS_BITS
+
+ return;
+}