From b68ab2609c67d07b6f12ed65125d76bf9a054479 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 27 Nov 2003 13:38:00 +0000
Subject: [PATCH] dont read from b frames if draw_horiz_band==NULL
Originally committed as revision 2533 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/mpegvideo.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index bfd086bf695..94444140762 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -2571,6 +2571,7 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
qpel_mc_func (*op_qpix)[16];
const int linesize= s->current_picture.linesize[0]; //not s->linesize as this woulnd be wrong for field pics
const int uvlinesize= s->current_picture.linesize[1];
+ const int readable= s->pict_type != B_TYPE || s->encoding || s->avctx->draw_horiz_band;
/* avoid copy if macroblock skipped in last frame too */
/* skip only during decoding as we might trash the buffers during encoding a bit */
@@ -2606,11 +2607,15 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
dct_linesize = linesize;
dct_offset = linesize * 8;
}
-
- dest_y= s->dest[0];
- dest_cb= s->dest[1];
- dest_cr= s->dest[2];
-
+ if(readable){
+ dest_y= s->dest[0];
+ dest_cb= s->dest[1];
+ dest_cr= s->dest[2];
+ }else{
+ dest_y = s->edge_emu_buffer+32; //FIXME cleanup scratchpad pointers
+ dest_cb= s->edge_emu_buffer+48;
+ dest_cr= s->edge_emu_buffer+56;
+ }
if (!s->mb_intra) {
/* motion handling */
/* decoding or more than one mb_type (MC was allready done otherwise) */
@@ -2688,6 +2693,11 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
}
}
}
+ if(!readable){
+ s->dsp.put_pixels_tab[0][0](s->dest[0], dest_y , linesize,16);
+ s->dsp.put_pixels_tab[1][0](s->dest[1], dest_cb, uvlinesize, 8);
+ s->dsp.put_pixels_tab[1][0](s->dest[2], dest_cr, uvlinesize, 8);
+ }
}
}
--
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