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Do loop filter per-row rather than per-frame

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3% faster on Elephants_Dream_HD-q7-aq7.ogg on my penryn

Originally committed as revision 21778 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-02-12 22:01:29 +00:00
parent fe3135564a
commit 256c0662ef
1 changed files with 12 additions and 7 deletions
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19
libavcodec/vp3.c
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@ -1389,21 +1389,19 @@ static void reverse_dc_prediction(Vp3DecodeContext *s,
}
}
static void apply_loop_filter(Vp3DecodeContext *s)
static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
{
int plane;
int x, y;
int *bounding_values= s->bounding_values_array+127;
for (plane = 0; plane < 3; plane++) {
int width = s->fragment_width >> !!plane;
int height = s->fragment_height >> !!plane;
int fragment = s->fragment_start [plane];
int fragment = s->fragment_start [plane] + ystart * width;
int stride = s->current_frame.linesize[plane];
uint8_t *plane_data = s->current_frame.data [plane];
if (!s->flipped_image) stride = -stride;
for (y = 0; y < height; y++) {
for (y = ystart; y < yend; y++) {
for (x = 0; x < width; x++) {
/* This code basically just deblocks on the edges of coded blocks.
@ -1450,7 +1448,6 @@ static void apply_loop_filter(Vp3DecodeContext *s)
fragment++;
}
}
}
}
/*
@ -1612,6 +1609,10 @@ static void render_slice(Vp3DecodeContext *s, int slice)
}
}
// Filter the previous block row. We can't filter the current row yet
// since it needs pixels from the next row
if (y > 0)
apply_loop_filter(s, plane, (y>>3)-1, (y>>3));
}
}
@ -2010,7 +2011,11 @@ static int vp3_decode_frame(AVCodecContext *avctx,
for (i = 0; i < s->macroblock_height; i++)
render_slice(s, i);
apply_loop_filter(s);
// filter the last row
for (i = 0; i < 3; i++) {
int row = (s->height >> (3+!!i)) - 1;
apply_loop_filter(s, i, row, row+1);
}
*data_size=sizeof(AVFrame);
*(AVFrame*)data= s->current_frame;