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| author | Yaowu Xu <yaowu@google.com> | 2011-10-25 16:08:51 +0000 |
|---|---|---|
| committer | On2 (Google) Code Review <on2-gerrit@google.com> | 2011-10-25 16:08:51 +0000 |
| commit | 4081e5b3fe41a062a42e6171d6c4ebceb85f8d88 (patch) | |
| tree | 90428d631004a84a8dfe8d7e04929e7ce1efe7f7 | |
| parent | 23701f4f877ba7bdb6c3b308c1fdd3bbcf3c91dd (diff) | |
| parent | a66c945c5973246561b3ff710886018f14e6679c (diff) | |
| download | libvpx-4081e5b3fe41a062a42e6171d6c4ebceb85f8d88.tar libvpx-4081e5b3fe41a062a42e6171d6c4ebceb85f8d88.tar.gz libvpx-4081e5b3fe41a062a42e6171d6c4ebceb85f8d88.tar.bz2 libvpx-4081e5b3fe41a062a42e6171d6c4ebceb85f8d88.zip | |
Merge "added a last stage rounding for 8x8 inverse dct" into experimental
| -rw-r--r-- | vp8/common/idctllm.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/vp8/common/idctllm.c b/vp8/common/idctllm.c index 567aa1dcc..a0042ae6d 100644 --- a/vp8/common/idctllm.c +++ b/vp8/common/idctllm.c @@ -369,7 +369,7 @@ static void idctcol (int *blk) ((blk[8 * 0] + 32) >> 6); return; } - x0 = (blk[8 * 0] << 8) + 8192; + x0 = (blk[8 * 0] << 8) + 16384; /* first stage */ x8 = W7 * (x4 + x5) + 4; @@ -399,14 +399,14 @@ static void idctcol (int *blk) x4 = (181 * (x4 - x5) + 128) >> 8; /* fourth stage */ - blk[8 * 0] = (x7 + x1) >> 14; - blk[8 * 1] = (x3 + x2) >> 14; - blk[8 * 2] = (x0 + x4) >> 14; - blk[8 * 3] = (x8 + x6) >> 14; - blk[8 * 4] = (x8 - x6) >> 14; - blk[8 * 5] = (x0 - x4) >> 14; - blk[8 * 6] = (x3 - x2) >> 14; - blk[8 * 7] = (x7 - x1) >> 14; + blk[8 * 0] = (x7 + x1 ) >> 15; + blk[8 * 1] = (x3 + x2 ) >> 15; + blk[8 * 2] = (x0 + x4 ) >> 15; + blk[8 * 3] = (x8 + x6 ) >> 15; + blk[8 * 4] = (x8 - x6 ) >> 15; + blk[8 * 5] = (x0 - x4 ) >> 15; + blk[8 * 6] = (x3 - x2 ) >> 15; + blk[8 * 7] = (x7 - x1 ) >> 15; } #define TX_DIM 8 @@ -434,7 +434,7 @@ void vp8_short_idct8x8_c(short *coefs, short *block, int pitch) { for (j = 0; j < TX_DIM; j++) { - block[i*shortpitch+j] = X[i * TX_DIM + j]>>1; + block[i*shortpitch+j] = X[i * TX_DIM + j]; } } } |