Optimize filter_mb_mbaff_edge*()

[ffmpeg] / libavcodec / mpeg12enc.c

diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 013b395d17869bd44dfd1ac888a19b4461c3e6ef..350fa4016bcb48b743295a587cae0649584332d1 100644 (file)
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -327,7 +327,12 @@ static av_always_inline void put_qscale(MpegEncContext *s)
 }
 
 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
-    put_header(s, SLICE_MIN_START_CODE + s->mb_y);
+    if (s->height > 2800) {
+        put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
+        put_bits(&s->pb, 3, s->mb_y >> 7);  /* slice_vertical_position_extension */
+    } else {
+        put_header(s, SLICE_MIN_START_CODE + s->mb_y);
+    }
     put_qscale(s);
     put_bits(&s->pb, 1, 0); /* slice extra information */
 }