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lowres2 support.

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The new lowres support is limited to decoders where lowres decoding
is possible in high quality.
I was not able to measure any speed difference, but if one is found
the 2-3 lines that might affect speed can be made compile time conditional

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-04-22 21:37:54 +02:00
parent 92ef4be4ab
commit 70d54392f5
23 changed files with 387 additions and 45 deletions
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7
libavcodec/utils.c
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@@ -149,8 +149,8 @@ unsigned avcodec_get_edge_width(void)
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
s->coded_width = width;
s->coded_height= height;
s->width = width;
s->height = height;
s->width = -((-width )>>s->lowres);
s->height= -((-height)>>s->lowres);
}
#define INTERNAL_BUFFER_SIZE (32+1)
@@ -239,8 +239,9 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
*width = FFALIGN(*width , w_align);
*height= FFALIGN(*height, h_align);
if (s->codec_id == CODEC_ID_H264)
if(s->codec_id == CODEC_ID_H264 || s->lowres)
*height+=2; // some of the optimized chroma MC reads one line too much
// which is also done in mpeg decoders with lowres > 0
for (i = 0; i < 4; i++)
linesize_align[i] = STRIDE_ALIGN;