+static int OpaquePage( decoder_t *p_dec, vbi_page p_page,
+ video_format_t fmt, picture_t **p_src )
+{
+ int result = VLC_EGENERIC;
+
+ /* Kludge since zvbi doesn't provide an option to specify opacity. */
+ switch( fmt.i_chroma )
+ {
+ case VLC_FOURCC('R','G','B','A' ):
+ result = Opaque_32bpp( p_dec, p_page, fmt, p_src );
+ break;
+ case VLC_FOURCC('Y','U','V','A' ):
+ result = Opaque_8bpp( p_dec, p_page, fmt, p_src );
+ break;
+ default:
+ msg_Err( p_dec, "chroma not supported %4.4s", (char *)&fmt.i_chroma );
+ return VLC_EGENERIC;
+ }
+ return result;
+}
+
+static int Opaque_32bpp( decoder_t *p_dec, vbi_page p_page,
+ video_format_t fmt, picture_t **p_src )
+{
+ decoder_sys_t *p_sys = (decoder_sys_t *) p_dec->p_sys;
+ uint32_t *p_begin, *p_end;
+ unsigned int x = 0, y = 0;
+ vbi_opacity opacity;
+
+ /* Kludge since zvbi doesn't provide an option to specify opacity. */
+ switch( fmt.i_chroma )
+ {
+ case VLC_FOURCC('R','G','B','A' ):
+ p_begin = (uint32_t *)(*p_src)->p->p_pixels;
+ p_end = (uint32_t *)(*p_src)->p->p_pixels +
+ ( fmt.i_width * fmt.i_height );
+ break;
+ default:
+ msg_Err( p_dec, "chroma not supported %4.4s", (char *)&fmt.i_chroma );
+ return VLC_EGENERIC;
+ }
+
+ for( ; p_begin < p_end; p_begin++ )
+ {
+ opacity = p_page.text[ y / 10 * p_page.columns + x / 12 ].opacity;
+ switch( opacity )
+ {
+ /* Show video instead of this character */
+ case VBI_TRANSPARENT_SPACE:
+ *p_begin = 0;
+ break;
+ /* To make the boxed text "closed captioning" transparent
+ * change true to false.
+ */
+ case VBI_OPAQUE:
+ if( p_sys->b_opaque )
+ break;
+ /* Full text transparency. only foreground color is show */
+ case VBI_TRANSPARENT_FULL:
+ *p_begin = 0;
+ break;
+ /* Transparency for boxed text */
+ case VBI_SEMI_TRANSPARENT:
+ if( (*p_begin & 0xffffff00) == 0xff )
+ *p_begin = 0;
+ break;
+ }
+ x++;
+ if( x >= fmt.i_width )
+ {
+ x = 0;
+ y++;
+ }
+ }
+ /* end of kludge */
+ return VLC_SUCCESS;
+}
+
+static int Opaque_8bpp( decoder_t *p_dec, vbi_page p_page,
+ video_format_t fmt, picture_t **p_src )
+{
+ decoder_sys_t *p_sys = (decoder_sys_t *) p_dec->p_sys;
+ uint8_t *p_begin, *p_end;
+ uint32_t i_width = 0;
+ unsigned int x = 0, y = 0;
+ vbi_opacity opacity;
+
+ /* Kludge since zvbi doesn't provide an option to specify opacity. */
+ switch( fmt.i_chroma )
+ {
+ case VLC_FOURCC('Y','U','V','A' ):
+ p_begin = (uint8_t *)(*p_src)->p[A_PLANE].p_pixels;
+ p_end = (uint8_t *)(*p_src)->p[A_PLANE].p_pixels +
+ ( fmt.i_height * (*p_src)->p[A_PLANE].i_pitch );
+ i_width = (*p_src)->p[A_PLANE].i_pitch;
+ break;
+ default:
+ msg_Err( p_dec, "chroma not supported %4.4s", (char *)&fmt.i_chroma );
+ return VLC_EGENERIC;
+ }
+
+ for( ; p_begin < p_end; p_begin++ )
+ {
+ opacity = p_page.text[ y / 10 * p_page.columns + x / 12 ].opacity;
+ switch( opacity )
+ {
+ /* Show video instead of this character */
+ case VBI_TRANSPARENT_SPACE:
+ *p_begin = 0;
+ break;
+ /* To make the boxed text "closed captioning" transparent
+ * change true to false.
+ */
+ case VBI_OPAQUE:
+ if( p_sys->b_opaque )
+ break;
+ /* Full text transparency. only foreground color is show */
+ case VBI_TRANSPARENT_FULL:
+ *p_begin = 0;
+ break;
+ /* Transparency for boxed text */
+ case VBI_SEMI_TRANSPARENT:
+ if( (*p_begin & 0xffffff00) == 0xff )
+ *p_begin = 0;
+ break;
+ }
+ x++;
+ if( x >= i_width )
+ {
+ x = 0;
+ y++;
+ }
+ }
+ /* end of kludge */
+ return VLC_SUCCESS;
+}
+