Re: [FFmpeg-devel] [PATCH 1/4] lavfi/framesync: use a local variable to shorten code

2023-01-27 Thread Nicolas George
Anton Khirnov (12023-01-27):
> ---
>  libavfilter/framesync.c | 33 -
>  1 file changed, 16 insertions(+), 17 deletions(-)
> 
> diff --git a/libavfilter/framesync.c b/libavfilter/framesync.c
> index ee91e4cf68..153db4fa21 100644
> --- a/libavfilter/framesync.c
> +++ b/libavfilter/framesync.c
> @@ -201,24 +201,23 @@ static int framesync_advance(FFFrameSync *fs)
>  break;
>  }
>  for (i = 0; i < fs->nb_in; i++) {
> -if (fs->in[i].pts_next == pts ||
> -(fs->in[i].ts_mode == TS_NEAREST &&
> - fs->in[i].have_next &&
> - fs->in[i].pts_next != INT64_MAX && fs->in[i].pts != 
> AV_NOPTS_VALUE &&
> - fs->in[i].pts_next - pts < pts - fs->in[i].pts) ||
> -(fs->in[i].before == EXT_INFINITY &&
> - fs->in[i].state == STATE_BOF)) {
> -av_frame_free(>in[i].frame);
> -fs->in[i].frame  = fs->in[i].frame_next;
> -fs->in[i].pts= fs->in[i].pts_next;
> -fs->in[i].frame_next = NULL;
> -fs->in[i].pts_next   = AV_NOPTS_VALUE;
> -fs->in[i].have_next  = 0;
> -fs->in[i].state  = fs->in[i].frame ? STATE_RUN : 
> STATE_EOF;
> -if (fs->in[i].sync == fs->sync_level && fs->in[i].frame)

> +FFFrameSyncIn * const in = >in[i];

Get rid of the const, since the rest of this code does not use anything
similar and the benefit is dubious.

> +
> +if (in->pts_next == pts ||
> +(in->ts_mode == TS_NEAREST && in->have_next &&
> + in->pts_next != INT64_MAX && in->pts != AV_NOPTS_VALUE &&
> + in->pts_next - pts < pts - in->pts) ||
> +(in->before == EXT_INFINITY && in->state == STATE_BOF)) {
> +av_frame_free(>frame);
> +in->frame  = in->frame_next;
> +in->pts= in->pts_next;
> +in->frame_next = NULL;
> +in->pts_next   = AV_NOPTS_VALUE;
> +in->have_next  = 0;
> +in->state  = in->frame ? STATE_RUN : STATE_EOF;
> +if (in->sync == fs->sync_level && in->frame)
>  fs->frame_ready = 1;
> -if (fs->in[i].state == STATE_EOF &&
> -fs->in[i].after == EXT_STOP)
> +if (in->state == STATE_EOF && in->after == EXT_STOP)
>  framesync_eof(fs);
>  }
>  }

I do not like this change. In fact, the more I think about it the more I
remember that I specifically considered using intermediate pointers for
inputs and deciding against: too much extra noise if done everywhere,
too little benefit for the inconsistency if done only where there are
many.

So: thanks but no.

-- 
  Nicolas George
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[FFmpeg-devel] [PATCH 1/4] lavfi/framesync: use a local variable to shorten code

2023-01-27 Thread Anton Khirnov
---
 libavfilter/framesync.c | 33 -
 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/libavfilter/framesync.c b/libavfilter/framesync.c
index ee91e4cf68..153db4fa21 100644
--- a/libavfilter/framesync.c
+++ b/libavfilter/framesync.c
@@ -201,24 +201,23 @@ static int framesync_advance(FFFrameSync *fs)
 break;
 }
 for (i = 0; i < fs->nb_in; i++) {
-if (fs->in[i].pts_next == pts ||
-(fs->in[i].ts_mode == TS_NEAREST &&
- fs->in[i].have_next &&
- fs->in[i].pts_next != INT64_MAX && fs->in[i].pts != 
AV_NOPTS_VALUE &&
- fs->in[i].pts_next - pts < pts - fs->in[i].pts) ||
-(fs->in[i].before == EXT_INFINITY &&
- fs->in[i].state == STATE_BOF)) {
-av_frame_free(>in[i].frame);
-fs->in[i].frame  = fs->in[i].frame_next;
-fs->in[i].pts= fs->in[i].pts_next;
-fs->in[i].frame_next = NULL;
-fs->in[i].pts_next   = AV_NOPTS_VALUE;
-fs->in[i].have_next  = 0;
-fs->in[i].state  = fs->in[i].frame ? STATE_RUN : STATE_EOF;
-if (fs->in[i].sync == fs->sync_level && fs->in[i].frame)
+FFFrameSyncIn * const in = >in[i];
+
+if (in->pts_next == pts ||
+(in->ts_mode == TS_NEAREST && in->have_next &&
+ in->pts_next != INT64_MAX && in->pts != AV_NOPTS_VALUE &&
+ in->pts_next - pts < pts - in->pts) ||
+(in->before == EXT_INFINITY && in->state == STATE_BOF)) {
+av_frame_free(>frame);
+in->frame  = in->frame_next;
+in->pts= in->pts_next;
+in->frame_next = NULL;
+in->pts_next   = AV_NOPTS_VALUE;
+in->have_next  = 0;
+in->state  = in->frame ? STATE_RUN : STATE_EOF;
+if (in->sync == fs->sync_level && in->frame)
 fs->frame_ready = 1;
-if (fs->in[i].state == STATE_EOF &&
-fs->in[i].after == EXT_STOP)
+if (in->state == STATE_EOF && in->after == EXT_STOP)
 framesync_eof(fs);
 }
 }
-- 
2.35.1

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