+/*****************************************************************************
+ * Yadif (Yet Another DeInterlacing Filter).
+ *****************************************************************************/
+/* */
+struct vf_priv_s {
+ /*
+ * 0: Output 1 frame for each frame.
+ * 1: Output 1 frame for each field.
+ * 2: Like 0 but skips spatial interlacing check.
+ * 3: Like 1 but skips spatial interlacing check.
+ *
+ * In vlc, only & 0x02 has meaning, as we do the & 0x01 ourself.
+ */
+ int mode;
+};
+
+/* I am unsure it is the right one */
+typedef intptr_t x86_reg;
+
+#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
+#define FFMAX(a,b) __MAX(a,b)
+#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
+#define FFMIN(a,b) __MIN(a,b)
+#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
+
+/* yadif.h comes from vf_yadif.c of mplayer project */
+#include "yadif.h"
+
+static void RenderYadif( vout_thread_t *p_vout, picture_t *p_dst, picture_t *p_src, int i_order, int i_field )
+{
+ vout_sys_t *p_sys = p_vout->p_sys;
+
+ /* */
+ assert( i_order == 0 || i_order == 1 );
+ assert( i_field == 0 || i_field == 1 );
+
+ if( i_order == 0 )
+ {
+ /* Duplicate the picture
+ * TODO when the vout rework is finished, picture_Hold() might be enough
+ * but becarefull, the pitches must match */
+ picture_t *p_dup = picture_NewFromFormat( &p_src->format );
+ if( p_dup )
+ picture_Copy( p_dup, p_src );
+
+ /* Slide the history */
+ if( p_sys->pp_history[0] )
+ picture_Release( p_sys->pp_history[0] );
+ for( int i = 1; i < HISTORY_SIZE; i++ )
+ p_sys->pp_history[i-1] = p_sys->pp_history[i];
+ p_sys->pp_history[HISTORY_SIZE-1] = p_dup;
+ }
+
+ /* As the pitches must match, use ONLY pictures coming from picture_New()! */
+ picture_t *p_prev = p_sys->pp_history[0];
+ picture_t *p_cur = p_sys->pp_history[1];
+ picture_t *p_next = p_sys->pp_history[2];
+
+ /* Filter if we have all the pictures we need */
+ if( p_prev && p_cur && p_next )
+ {
+ /* */
+ void (*filter)(struct vf_priv_s *p, uint8_t *dst, uint8_t *prev, uint8_t *cur, uint8_t *next, int w, int refs, int parity);
+#if defined(HAVE_YADIF_SSE2)
+ if( vlc_CPU() & CPU_CAPABILITY_SSE2 )
+ filter = yadif_filter_line_mmx2;
+ else
+#endif
+ filter = yadif_filter_line_c;
+
+ for( int n = 0; n < p_dst->i_planes; n++ )
+ {
+ const plane_t *prevp = &p_prev->p[n];
+ const plane_t *curp = &p_cur->p[n];
+ const plane_t *nextp = &p_next->p[n];
+ plane_t *dstp = &p_dst->p[n];
+
+ for( int y = 1; y < dstp->i_visible_lines - 1; y++ )
+ {
+ if( (y % 2) == i_field )
+ {
+ vlc_memcpy( &dstp->p_pixels[y * dstp->i_pitch],
+ &curp->p_pixels[y * curp->i_pitch], dstp->i_visible_pitch );
+ }
+ else
+ {
+ struct vf_priv_s cfg;
+ /* Spatial checks only when enough data */
+ cfg.mode = (y >= 2 && y < dstp->i_visible_lines - 2) ? 0 : 2;
+
+ assert( prevp->i_pitch == curp->i_pitch && curp->i_pitch == nextp->i_pitch );
+ filter( &cfg,
+ &dstp->p_pixels[y * dstp->i_pitch],
+ &prevp->p_pixels[y * prevp->i_pitch],
+ &curp->p_pixels[y * curp->i_pitch],
+ &nextp->p_pixels[y * nextp->i_pitch],
+ dstp->i_visible_pitch,
+ curp->i_pitch,
+ (i_field ^ (i_order == i_field)) & 1 );
+ }
+
+ /* We duplicate the first and last lines */
+ if( y == 1 )
+ vlc_memcpy(&dstp->p_pixels[(y-1) * dstp->i_pitch], &dstp->p_pixels[y * dstp->i_pitch], dstp->i_pitch);
+ else if( y == dstp->i_visible_lines - 2 )
+ vlc_memcpy(&dstp->p_pixels[(y+1) * dstp->i_pitch], &dstp->p_pixels[y * dstp->i_pitch], dstp->i_pitch);
+ }
+ }
+
+ /* */
+ p_dst->date = (p_next->date - p_cur->date) * i_order / 2 + p_cur->date;
+ }
+ else
+ {
+ /* Fallback to something simple
+ * XXX it is wrong when we have 2 pictures, we should not output a picture */
+ RenderX( p_dst, p_src );
+ }
+}
+