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MC rounding fixed? 

UMV
still not bugfree :(

Originally committed as revision 2127 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-08-19 17:10:00 +00:00
parent 8e39d4a744
commit a2f11b3c3a
1 changed files with 20 additions and 20 deletions
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40
libavcodec/vp3.c
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@ -287,6 +287,7 @@ typedef struct Vp3DecodeContext {
int last_coded_y_fragment;
int last_coded_c_fragment;
uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
} Vp3DecodeContext;
/************************************************************************
@ -2340,7 +2341,7 @@ static void render_fragments(Vp3DecodeContext *s,
int motion_x, motion_y;
int upper_motion_limit, lower_motion_limit;
int motion_halfpel_index;
unsigned int motion_source;
uint8_t *motion_source;
debug_vp3(" vp3: rendering final fragments for %s\n",
(plane == 0) ? "Y plane" : (plane == 1) ? "U plane" : "V plane");
@ -2386,15 +2387,24 @@ static void render_fragments(Vp3DecodeContext *s,
/* transform if this block was coded */
if (s->all_fragments[i].coding_method != MODE_COPY) {
motion_source = s->all_fragments[i].first_pixel;
if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
(s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
motion_source= golden_plane;
else
motion_source= last_plane;
motion_source += s->all_fragments[i].first_pixel;
motion_halfpel_index = 0;
/* sort out the motion vector if this fragment is coded
* using a motion vector method */
if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
(s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
int src_x, src_y;
motion_x = s->all_fragments[i].motion_x;
motion_y = s->all_fragments[i].motion_y;
src_x= (motion_x>>1) + x;
src_y= (motion_y>>1) + y;
if ((motion_x == 0xbeef) || (motion_y == 0xbeef))
printf (" help! got beefy vector! (%X, %X)\n", motion_x, motion_y);
@ -2417,32 +2427,22 @@ printf (" help! got beefy vector! (%X, %X)\n", motion_x, motion_y);
motion_source -= (((motion_y + 1) >> 1) * stride);
}
/* if the are any problems with a motion vector, refuse
* to render the block */
if ((motion_source < upper_motion_limit) ||
(motion_source > lower_motion_limit)) {
printf (" vp3: help! motion source (%d) out of range (%d..%d), fragment %d\n",
motion_source, upper_motion_limit, lower_motion_limit, i);
continue;
if(src_x<0 || src_y<0 || src_x + 9 >= width || src_y + 9 >= height){
uint8_t *temp= s->edge_emu_buffer;
if(stride<0) temp -= 9*stride;
ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, width, height);
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_USING_GOLDEN) ||
(s->all_fragments[i].coding_method == MODE_GOLDEN_MV)) {
s->dsp.put_pixels_tab[1][motion_halfpel_index](
output_plane + s->all_fragments[i].first_pixel,
golden_plane + motion_source,
stride, 8);
} else
if (s->all_fragments[i].coding_method != MODE_INTRA) {
s->dsp.put_pixels_tab[1][motion_halfpel_index](
s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
output_plane + s->all_fragments[i].first_pixel,
last_plane + motion_source,
motion_source,
stride, 8);
}