improved mpeg1/2 decoding speed

Originally committed as revision 517 to svn://svn.ffmpeg.org/ffmpeg/trunk
23 years ago · 5bd12d1277
parent 44f27b3a86
commit 5bd12d1277
1 changed files with 6 additions and 0 deletions
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@ -855,6 +855,8 @@ static int mpeg_decode_mb(MpegEncContext *s,
                if (cbp & (1 << (5 - i))) {
                    if (mpeg2_decode_block_intra(s, block[i], i) < 0)
                        return -1;
+                } else {
+                    s->block_last_index[i] = -1;
                }
            }
        } else {
@ -862,6 +864,8 @@ static int mpeg_decode_mb(MpegEncContext *s,
                if (cbp & (1 << (5 - i))) {
                    if (mpeg2_decode_block_non_intra(s, block[i], i) < 0)
                        return -1;
+                } else {
+                    s->block_last_index[i] = -1;
                }
            }
        }
@ -870,6 +874,8 @@ static int mpeg_decode_mb(MpegEncContext *s,
            if (cbp & (1 << (5 - i))) {
                if (mpeg1_decode_block(s, block[i], i) < 0)
                    return -1;
+            } else {
+                s->block_last_index[i] = -1;
            }
        }
    }