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-rw-r--r--libavcodec/msmpeg4.c41
1 files changed, 20 insertions, 21 deletions
diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c
index 94bd86e..c9a2108 100644
--- a/libavcodec/msmpeg4.c
+++ b/libavcodec/msmpeg4.c
@@ -5,20 +5,20 @@
*
* msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -37,6 +37,7 @@
#include "msmpeg4data.h"
#include "mpegvideodata.h"
#include "vc1data.h"
+#include "libavutil/imgutils.h"
/*
* You can also call this codec : MPEG4 with a twist !
@@ -52,6 +53,9 @@ static av_cold void init_h263_dc_for_msmpeg4(void)
{
int level, uni_code, uni_len;
+ if(ff_v2_dc_chroma_table[255 + 256][1])
+ return;
+
for(level=-256; level<256; level++){
int size, v, l;
/* find number of bits */
@@ -104,8 +108,6 @@ static av_cold void init_h263_dc_for_msmpeg4(void)
av_cold void ff_msmpeg4_common_init(MpegEncContext *s)
{
- static int initialized=0;
-
switch(s->msmpeg4_version){
case 1:
case 2:
@@ -144,11 +146,7 @@ av_cold void ff_msmpeg4_common_init(MpegEncContext *s)
}
//Note the default tables are set in common_init in mpegvideo.c
- if(!initialized){
- initialized=1;
-
- init_h263_dc_for_msmpeg4();
- }
+ init_h263_dc_for_msmpeg4();
}
/* predict coded block */
@@ -178,13 +176,13 @@ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block
return pred;
}
-static int get_dc(uint8_t *src, int stride, int scale)
+static int get_dc(uint8_t *src, int stride, int scale, int block_size)
{
int y;
int sum=0;
- for(y=0; y<8; y++){
+ for(y=0; y<block_size; y++){
int x;
- for(x=0; x<8; x++){
+ for(x=0; x<block_size; x++){
sum+=src[x + y*stride];
}
}
@@ -230,13 +228,13 @@ int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,
"addl %%eax, %2 \n\t"
"addl %%eax, %1 \n\t"
"addl %0, %%eax \n\t"
- "mull %4 \n\t"
+ "imull %4 \n\t"
"movl %%edx, %0 \n\t"
"movl %1, %%eax \n\t"
- "mull %4 \n\t"
+ "imull %4 \n\t"
"movl %%edx, %1 \n\t"
"movl %2, %%eax \n\t"
- "mull %4 \n\t"
+ "imull %4 \n\t"
"movl %%edx, %2 \n\t"
: "+b" (a), "+c" (b), "+D" (c)
: "g" (scale), "S" (ff_inverse[scale])
@@ -276,17 +274,18 @@ int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,
*dir_ptr = 0;
}
}else{
+ int bs = 8 >> s->avctx->lowres;
if(n<4){
wrap= s->linesize;
- dest= s->current_picture.f->data[0] + (((n >> 1) + 2*s->mb_y) * 8* wrap ) + ((n & 1) + 2*s->mb_x) * 8;
+ dest= s->current_picture.f->data[0] + (((n >> 1) + 2*s->mb_y) * bs* wrap ) + ((n & 1) + 2*s->mb_x) * bs;
}else{
wrap= s->uvlinesize;
- dest= s->current_picture.f->data[n - 3] + (s->mb_y * 8 * wrap) + s->mb_x * 8;
+ dest= s->current_picture.f->data[n - 3] + (s->mb_y * bs * wrap) + s->mb_x * bs;
}
if(s->mb_x==0) a= (1024 + (scale>>1))/scale;
- else a= get_dc(dest-8, wrap, scale*8);
+ else a= get_dc(dest-bs, wrap, scale*8>>(2*s->avctx->lowres), bs);
if(s->mb_y==0) c= (1024 + (scale>>1))/scale;
- else c= get_dc(dest-8*wrap, wrap, scale*8);
+ else c= get_dc(dest-bs*wrap, wrap, scale*8>>(2*s->avctx->lowres), bs);
if (s->h263_aic_dir==0) {
pred= a;
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