[FFmpeg-devel] [PATCH v1 3/3] avfilter/vf_yadif: remove duplicate code with macro-based function

Limin Wang lance.lmwang at gmail.com
Thu Dec 26 03:15:27 EET 2019


On Wed, Dec 25, 2019 at 05:57:58PM +0100, Michael Niedermayer wrote:
> On Tue, Dec 24, 2019 at 09:13:39AM +0800, Limin Wang wrote:
> > On Thu, Nov 28, 2019 at 09:34:18AM +0800, lance.lmwang at gmail.com wrote:
> > > From: Limin Wang <lance.lmwang at gmail.com>
> > > 
> > > Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> > > ---
> > >  libavfilter/vf_yadif.c | 147 +++++++++++++++--------------------------
> > >  1 file changed, 54 insertions(+), 93 deletions(-)
> > > 
> > > diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
> > > index f53bb77008..15d8c47b0b 100644
> > > --- a/libavfilter/vf_yadif.c
> > > +++ b/libavfilter/vf_yadif.c
> > > @@ -91,101 +91,62 @@ typedef struct ThreadData {
> > >          next2++; \
> > >      }
> > >  
> > > -static void filter_line_c(void *dst1,
> > > -                          void *prev1, void *cur1, void *next1,
> > > -                          int w, int prefs, int mrefs, int parity, int mode)
> > > -{
> > > -    uint8_t *dst  = dst1;
> > > -    uint8_t *prev = prev1;
> > > -    uint8_t *cur  = cur1;
> > > -    uint8_t *next = next1;
> > > -    int x;
> > > -    uint8_t *prev2 = parity ? prev : cur ;
> > > -    uint8_t *next2 = parity ? cur  : next;
> > > -
> > > -    /* The function is called with the pointers already pointing to data[3] and
> > > -     * with 6 subtracted from the width.  This allows the FILTER macro to be
> > > -     * called so that it processes all the pixels normally.  A constant value of
> > > -     * true for is_not_edge lets the compiler ignore the if statement. */
> > > -    FILTER(0, w, 1)
> > > +#define FILTER_LINE_FUNC(type, depth, bps)                                         \
> > > +static void filter_line_c_##depth##bit(void *dst1,                                 \
> > > +                          void *prev1, void *cur1, void *next1,                    \
> > > +                          int w, int prefs, int mrefs, int parity, int mode)       \
> > > +{                                                                                  \
> > > +    type *dst  = dst1;                                                             \
> > > +    type *prev = prev1;                                                            \
> > > +    type *cur  = cur1;                                                             \
> > > +    type *next = next1;                                                            \
> > > +    int x;                                                                         \
> > > +    type *prev2 = parity ? prev : cur ;                                            \
> > > +    type *next2 = parity ? cur  : next;                                            \
> > > +    mrefs /= bps;                                                                  \
> > > +    prefs /= bps;                                                                  \
> > > +                                                                                   \
> > > +    /* The function is called with the pointers already pointing to data[3] and */ \
> > > +    /* with 6 subtracted from the width.  This allows the FILTER macro to be */    \
> > > +    /* called so that it processes all the pixels normally. A constant value of */ \
> > > +    /* true for is_not_edge lets the compiler ignore the if statement. */          \
> > > +    FILTER(0, w, 1)                                                                \
> > >  }
> > > +FILTER_LINE_FUNC(uint16_t, 16, 2);
> > > +FILTER_LINE_FUNC(uint8_t, 8, 1);
> > >  
> > >  #define MAX_ALIGN 8
> > > -static void filter_edges(void *dst1, void *prev1, void *cur1, void *next1,
> > > -                         int w, int prefs, int mrefs, int parity, int mode)
> > > -{
> > > -    uint8_t *dst  = dst1;
> > > -    uint8_t *prev = prev1;
> > > -    uint8_t *cur  = cur1;
> > > -    uint8_t *next = next1;
> > > -    int x;
> > > -    uint8_t *prev2 = parity ? prev : cur ;
> > > -    uint8_t *next2 = parity ? cur  : next;
> > > -
> > > -    const int edge = MAX_ALIGN - 1;
> > > -
> > > -    /* Only edge pixels need to be processed here.  A constant value of false
> > > -     * for is_not_edge should let the compiler ignore the whole branch. */
> > > -    FILTER(0, 3, 0)
> > > -
> > > -    dst  = (uint8_t*)dst1  + w - edge;
> > > -    prev = (uint8_t*)prev1 + w - edge;
> > > -    cur  = (uint8_t*)cur1  + w - edge;
> > > -    next = (uint8_t*)next1 + w - edge;
> > > -    prev2 = (uint8_t*)(parity ? prev : cur);
> > > -    next2 = (uint8_t*)(parity ? cur  : next);
> > > -
> > > -    FILTER(w - edge, w - 3, 1)
> > > -    FILTER(w - 3, w, 0)
> > > -}
> > > -
> > > -
> > > -static void filter_line_c_16bit(void *dst1,
> > > -                                void *prev1, void *cur1, void *next1,
> > > -                                int w, int prefs, int mrefs, int parity,
> > > -                                int mode)
> > > -{
> > > -    uint16_t *dst  = dst1;
> > > -    uint16_t *prev = prev1;
> > > -    uint16_t *cur  = cur1;
> > > -    uint16_t *next = next1;
> > > -    int x;
> > > -    uint16_t *prev2 = parity ? prev : cur ;
> > > -    uint16_t *next2 = parity ? cur  : next;
> > > -    mrefs /= 2;
> > > -    prefs /= 2;
> > > -
> > > -    FILTER(0, w, 1)
> > > -}
> > > -
> > > -static void filter_edges_16bit(void *dst1, void *prev1, void *cur1, void *next1,
> > > -                               int w, int prefs, int mrefs, int parity, int mode)
> > > -{
> > > -    uint16_t *dst  = dst1;
> > > -    uint16_t *prev = prev1;
> > > -    uint16_t *cur  = cur1;
> > > -    uint16_t *next = next1;
> > > -    int x;
> > > -    uint16_t *prev2 = parity ? prev : cur ;
> > > -    uint16_t *next2 = parity ? cur  : next;
> > > -
> > > -    const int edge = MAX_ALIGN / 2 - 1;
> > > -
> > > -    mrefs /= 2;
> > > -    prefs /= 2;
> > > -
> > > -    FILTER(0, 3, 0)
> > > -
> > > -    dst   = (uint16_t*)dst1  + w - edge;
> > > -    prev  = (uint16_t*)prev1 + w - edge;
> > > -    cur   = (uint16_t*)cur1  + w - edge;
> > > -    next  = (uint16_t*)next1 + w - edge;
> > > -    prev2 = (uint16_t*)(parity ? prev : cur);
> > > -    next2 = (uint16_t*)(parity ? cur  : next);
> > > -
> > > -    FILTER(w - edge, w - 3, 1)
> > > -    FILTER(w - 3, w, 0)
> > > +#define EDGES_FUNC(type, depth, bps)                                              \
> > > +static void filter_edges_##depth##bit(void *dst1, void *prev1, void *cur1,        \
> > > +                  void *next1, int w, int prefs, int mrefs, int parity, int mode) \
> > > +{                                                                                 \
> > > +    type *dst  = dst1;                                                            \
> > > +    type *prev = prev1;                                                           \
> > > +    type *cur  = cur1;                                                            \
> > > +    type *next = next1;                                                           \
> > > +    int x;                                                                        \
> > > +    type *prev2 = parity ? prev : cur ;                                           \
> > > +    type *next2 = parity ? cur  : next;                                           \
> > > +                                                                                  \
> > > +    const int edge = MAX_ALIGN / bps - 1;                                         \
> > > +                                                                                  \
> > > +    mrefs /= bps;                                                                 \
> > > +    prefs /= bps;                                                                 \
> > > +                                                                                  \
> > > +    FILTER(0, 3, 0)                                                               \
> > > +                                                                                  \
> > > +    dst   = (type*)dst1  + w - edge;                                              \
> > > +    prev  = (type*)prev1 + w - edge;                                              \
> > > +    cur   = (type*)cur1  + w - edge;                                              \
> > > +    next  = (type*)next1 + w - edge;                                              \
> > > +    prev2 = (type*)(parity ? prev : cur);                                         \
> > > +    next2 = (type*)(parity ? cur  : next);                                        \
> > > +                                                                                  \
> > > +    FILTER(w - edge, w - 3, 1)                                                    \
> > > +    FILTER(w - 3, w, 0)                                                           \
> > >  }
> > > +EDGES_FUNC(uint16_t, 16, 2);
> > > +EDGES_FUNC(uint8_t, 8, 1);
> > >  
> > >  static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
> > >  {
> > > @@ -313,8 +274,8 @@ static int config_output(AVFilterLink *outlink)
> > >          s->filter_line  = filter_line_c_16bit;
> > >          s->filter_edges = filter_edges_16bit;
> > >      } else {
> > > -        s->filter_line  = filter_line_c;
> > > -        s->filter_edges = filter_edges;
> > > +        s->filter_line  = filter_line_c_8bit;
> > > +        s->filter_edges = filter_edges_8bit;
> > >      }
> > 
> > ping
> 
> the patch is fine, iam just a bit undecided if a template file would be
> cleaner, maybe others have a preferance ?

I think avfilter prefer to use macro-based function, only three templates are 
used.

[lmwang at vpn libavfilter]$ ls *template*
colorspacedsp_template.c  colorspacedsp_yuv2yuv_template.c  median_template.c

> 
> 
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> 
> What does censorship reveal? It reveals fear. -- Julian Assange



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