avfilter/video: Add ff_default_get_video_buffer2() to set specific alignment

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavfilter/video.c

@@ -38,13 +38,12 @@ AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
     return ff_get_video_buffer(link->dst->outputs[0], w, h);
 }
 
-AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
+AVFrame *ff_default_get_video_buffer2(AVFilterLink *link, int w, int h, int align)
 {
     AVFrame *frame = NULL;
     int pool_width = 0;
     int pool_height = 0;
     int pool_align = 0;
-    int align = av_cpu_max_align();
     enum AVPixelFormat pool_format = AV_PIX_FMT_NONE;
 
     if (link->hw_frames_ctx &&
@@ -94,6 +93,11 @@ AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
     return frame;
 }
 
+AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
+{
+    return ff_default_get_video_buffer2(link, w, h, av_cpu_max_align());
+}
+
 AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
 {
     AVFrame *ret = NULL;

libavfilter/video.h

@@ -24,6 +24,7 @@
 #include "avfilter.h"
 
 AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h);
+AVFrame *ff_default_get_video_buffer2(AVFilterLink *link, int w, int h, int align);
 AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h);
 
 /**