add 8x8 intra prediction modes

Patch 1 to Patch 3 is an initial implementation of 8x8 intra prediction
modes, here are with the following assumptions:
a. 8x8 has 4 prediction modes DC, H, V and TM
b. UV 4x4 block use the same mode as corresponding 8x8 area
c. i8x8 modes are enabled for key frame only for now
Patch 4:
d. removed debug code from previous patches
Patch 5:
e. added stats code to collect entropy stats and further cleaned up
Patch 6:
f. changed mode stats code to collect finer stats of modes
Patch 7:
g. normalized i8x8 modes distribution to total at 256 (8bits).
Patch 8:
h. fixed a bug in decoder and removed debug printf output.
Patch 9:
i. more cleanups to address paul's comment
Patch 10:
j. messy rebase/merges to bring the commit up to date.

Tests on HD clips encoded with all key frame showing consistent gain
on all clips and all metrics:~0.5%(psnr) and 0.6%(ssim):
http://www.corp.google.com/~yaowu/no_crawl/i8x8hd_allkey_fixedq.html

To build and test, configure with:
--enable-experimental --enable-i8x8

Change-Id: I9813fe07ae48cab5fdb5d904bca022514ad01e7f

1 files changed, 11 insertions, 0 deletions

diff --git a/vp8/common/generic/systemdependent.c b/vp8/common/generic/systemdependent.c
index 1acc0157b..68ed8aab0 100644
--- a/vp8/common/generic/systemdependent.c
+++ b/vp8/common/generic/systemdependent.c
@@ -86,6 +86,9 @@ void vp8_machine_specific_config(VP8_COMMON *ctx)
     rtcd->recon.copy8x8     = vp8_copy_mem8x8_c;
     rtcd->recon.copy8x4     = vp8_copy_mem8x4_c;
     rtcd->recon.recon       = vp8_recon_b_c;
+#if CONFIG_I8X8
+    rtcd->recon.recon_uv    = vp8_recon_uv_b_c;
+#endif
     rtcd->recon.recon2      = vp8_recon2b_c;
     rtcd->recon.recon4      = vp8_recon4b_c;
     rtcd->recon.recon_mb    = vp8_recon_mb_c;
@@ -101,6 +104,14 @@ void vp8_machine_specific_config(VP8_COMMON *ctx)
     rtcd->recon.intra4x4_predict =
         vp8_intra4x4_predict;
 
+#if CONFIG_I8X8
+    rtcd->recon.intra8x8_predict =
+        vp8_intra8x8_predict;
+    rtcd->recon.intra_uv4x4_predict =
+        vp8_intra_uv4x4_predict;
+#endif
+
+
     rtcd->subpix.sixtap16x16   = vp8_sixtap_predict16x16_c;
     rtcd->subpix.sixtap8x8     = vp8_sixtap_predict8x8_c;
     rtcd->subpix.sixtap8x4     = vp8_sixtap_predict8x4_c;