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fix motion compensation with (x+1/2,y+1/2) MVs

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Originally committed as revision 2849 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-03-05 18:44:04 +00:00
parent ca5b9f20b2
commit c0a0170c16
3 changed files with 26 additions and 5 deletions
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10
libavcodec/dsputil.c
View File

@ -874,6 +874,13 @@ PIXOP2(put, op_put)
#define avg2(a,b) ((a+b+1)>>1)
#define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
static void put_no_rnd_pixels16_l2_c(uint8_t *dst, const uint8_t *a, const uint8_t *b, int stride, int h){
put_no_rnd_pixels16_l2(dst, a, b, stride, stride, stride, h);
}
static void put_no_rnd_pixels8_l2_c(uint8_t *dst, const uint8_t *a, const uint8_t *b, int stride, int h){
put_no_rnd_pixels8_l2(dst, a, b, stride, stride, stride, h);
}
static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h, int x16, int y16, int rounder)
{
@ -3158,6 +3165,9 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
dspfunc(avg, 3, 2);
#undef dspfunc
c->put_no_rnd_pixels_l2[0]= put_no_rnd_pixels16_l2_c;
c->put_no_rnd_pixels_l2[1]= put_no_rnd_pixels8_l2_c;
c->put_tpel_pixels_tab[ 0] = put_tpel_pixels_mc00_c;
c->put_tpel_pixels_tab[ 1] = put_tpel_pixels_mc10_c;
c->put_tpel_pixels_tab[ 2] = put_tpel_pixels_mc20_c;

2
libavcodec/dsputil.h
View File

@ -204,6 +204,8 @@ typedef struct DSPContext {
*/
op_pixels_func avg_no_rnd_pixels_tab[2][4];
void (*put_no_rnd_pixels_l2[2])(uint8_t *block/*align width (8 or 16)*/, const uint8_t *a/*align 1*/, const uint8_t *b/*align 1*/, int line_size, int h);
/**
* Thirdpel motion compensation with rounding (a+b+1)>>1.
* this is an array[12] of motion compensation funcions for the 9 thirdpel positions<br>

19
libavcodec/vp3.c
View File

@ -2451,15 +2451,24 @@ av_log(s->avctx, AV_LOG_ERROR, " help! got beefy vector! (%X, %X)\n", motion_x,
motion_source= temp;
}
}
/* first, take care of copying a block from either the
* previous or the golden frame */
if (s->all_fragments[i].coding_method != MODE_INTRA) {
s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
output_plane + s->all_fragments[i].first_pixel,
motion_source,
stride, 8);
//Note, it is possible to implement all MC cases with put_no_rnd_pixels_l2 which would look more like the VP3 source but this would be slower as put_no_rnd_pixels_tab is better optimzed
if(motion_halfpel_index != 3){
s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
output_plane + s->all_fragments[i].first_pixel,
motion_source, stride, 8);
}else{
int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
s->dsp.put_no_rnd_pixels_l2[1](
output_plane + s->all_fragments[i].first_pixel,
motion_source - d,
motion_source + stride + 1 + d,
stride, 8);
}
}
/* dequantize the DCT coefficients */