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fix bugs in new loop filter code; also, refrain from filtering against

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data that has yet to be rendered; still #if'd out, will revisit when
proper algorithm can be validated

Originally committed as revision 4297 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2005-05-21 19:31:16 +00:00
parent e2b9cf4e2e
commit 2935001c86
1 changed files with 25 additions and 31 deletions
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56
libavcodec/vp3.c
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@ -2247,7 +2247,7 @@ static void render_slice(Vp3DecodeContext *s, int slice)
slice_height = y + FRAGMENT_PIXELS;
i = s->macroblock_fragments[current_macroblock_entry + 5];
}
fragment_width = plane_width / 2;
fragment_width = plane_width / FRAGMENT_PIXELS;
if(ABS(stride) > 2048)
return; //various tables are fixed size
@ -2396,42 +2396,36 @@ static void render_slice(Vp3DecodeContext *s, int slice)
}
#if 0
/* do not perform left edge filter for left columns frags */
/* perform the left edge filter if:
* - the fragment is not on the left column
* - the fragment is coded in this frame
* - the fragment is not coded in this frame but the left
* fragment is coded in this frame (this is done instead
* of a right edge filter when rendering the left fragment
* since this fragment is not available yet) */
if ((x > 0) &&
(s->all_fragments[i].coding_method != MODE_COPY)) {
((s->all_fragments[i].coding_method != MODE_COPY) ||
((s->all_fragments[i].coding_method == MODE_COPY) &&
(s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
horizontal_filter(
output_plane + s->all_fragments[i].first_pixel - 7*stride,
stride, bounding_values);
output_plane + s->all_fragments[i].first_pixel + 7*stride,
-stride, bounding_values);
}
/* do not perform top edge filter for top row fragments */
/* perform the top edge filter if:
* - the fragment is not on the top row
* - the fragment is coded in this frame
* - the fragment is not coded in this frame but the above
* fragment is coded in this frame (this is done instead
* of a bottom edge filter when rendering the above
* fragment since this fragment is not available yet) */
if ((y > 0) &&
(s->all_fragments[i].coding_method != MODE_COPY)) {
((s->all_fragments[i].coding_method != MODE_COPY) ||
((s->all_fragments[i].coding_method == MODE_COPY) &&
(s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
vertical_filter(
output_plane + s->all_fragments[i].first_pixel + stride,
stride, bounding_values);
}
/* do not perform right edge filter for right column
* fragments or if right fragment neighbor is also coded
* in this frame (it will be filtered for next fragment) */
if ((x < plane_width - 1) &&
(s->all_fragments[i].coding_method != MODE_COPY) &&
(s->all_fragments[i + 1].coding_method == MODE_COPY)) {
horizontal_filter(
output_plane + s->all_fragments[i + 1].first_pixel - 7*stride,
stride, bounding_values);
}
/* do not perform bottom edge filter for bottom row
* fragments or if bottom fragment neighbor is also coded
* in this frame (it will be filtered in the next row) */
if ((y < plane_height - 1) &&
(s->all_fragments[i].coding_method != MODE_COPY) &&
(s->all_fragments[i + fragment_width].coding_method == MODE_COPY)) {
vertical_filter(
output_plane + s->all_fragments[i + fragment_width].first_pixel + stride,
stride, bounding_values);
output_plane + s->all_fragments[i].first_pixel - stride,
-stride, bounding_values);
}
#endif
}