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| author | Paul Wilkins <paulwilkins@google.com> | 2012-02-09 15:44:18 +0000 |
|---|---|---|
| committer | Paul Wilkins <paulwilkins@google.com> | 2012-02-09 15:44:18 +0000 |
| commit | 8266abfe96cb1b46f537aec66b3dfcf22da2bb1c (patch) | |
| tree | a8d374f99b871026419380b1b76fade8122d0943 /vp8/common | |
| parent | 59a200f1ea73d2327746fff3d35a05aec10e436f (diff) | |
| download | libvpx-8266abfe96cb1b46f537aec66b3dfcf22da2bb1c.tar libvpx-8266abfe96cb1b46f537aec66b3dfcf22da2bb1c.tar.gz libvpx-8266abfe96cb1b46f537aec66b3dfcf22da2bb1c.tar.bz2 libvpx-8266abfe96cb1b46f537aec66b3dfcf22da2bb1c.zip | |
Dual pred flag
Further changes to make experiments with the context
used for coding the dual pred flag easier.
Current best performing method tested on derf is a two
element context based on reference frame. I also tried
various combinations of mode and reference frame as
shown in commented out case using up to 6 contexts.
Derf +0.26 overall psnr +0.15% ssim vs original method.
Change-Id: I64c21ddec0abbb27feaaeaa1da2e9f164ebaca03
Diffstat (limited to 'vp8/common')
| -rw-r--r-- | vp8/common/onyxc_int.h | 10 | ||||
| -rw-r--r-- | vp8/common/pred_common.c | 19 |
2 files changed, 17 insertions, 12 deletions
diff --git a/vp8/common/onyxc_int.h b/vp8/common/onyxc_int.h index b05bf2596..d6f5b1315 100644 --- a/vp8/common/onyxc_int.h +++ b/vp8/common/onyxc_int.h @@ -48,6 +48,14 @@ void vp8_initialize_common(void); #define MAX_PARTITIONS 9 +#if CONFIG_DUALPRED +#if CONFIG_COMPRED +#define DUAL_PRED_CONTEXTS 2 +#else +#define DUAL_PRED_CONTEXTS 3 +#endif +#endif /* CONFIG_DUALPRED */ + typedef struct frame_contexts { vp8_prob bmode_prob [VP8_BINTRAMODES-1]; @@ -242,7 +250,7 @@ typedef struct VP8Common #endif #if CONFIG_DUALPRED - vp8_prob prob_dualpred[3]; + vp8_prob prob_dualpred[DUAL_PRED_CONTEXTS]; #endif /* CONFIG_DUALPRED */ FRAME_CONTEXT lfc_a; /* last alt ref entropy */ diff --git a/vp8/common/pred_common.c b/vp8/common/pred_common.c index 810c11d2f..6d8256812 100644 --- a/vp8/common/pred_common.c +++ b/vp8/common/pred_common.c @@ -41,24 +41,21 @@ unsigned char get_pred_context( VP8_COMMON *const cm, case PRED_DUAL: // Context based on use of dual pred flag by neighbours //pred_context = - // ((m - 1)->mbmi.second_ref_frame != INTRA_FRAME) + + // ((m - 1)->mbmi.second_ref_frame != INTRA_FRAME) + // ((m - cm->mode_info_stride)->mbmi.second_ref_frame != INTRA_FRAME); - // Context based on mode - //if ( m->mbmi.mode == ZEROMV ) - // pred_context = 0; - //else if ( (m->mbmi.mode == NEARESTMV) || (m->mbmi.mode == NEARMV) ) - // pred_context = 1; + // Context based on mode and reference frame + //if ( m->mbmi.ref_frame == LAST_FRAME ) + // pred_context = 0 + (m->mbmi.mode != ZEROMV); + //else if ( m->mbmi.ref_frame == GOLDEN_FRAME ) + // pred_context = 2 + (m->mbmi.mode != ZEROMV); //else - // pred_context = 2; + // pred_context = 4 + (m->mbmi.mode != ZEROMV); - // Context based on reference frame if ( m->mbmi.ref_frame == LAST_FRAME ) pred_context = 0; - else if ( m->mbmi.ref_frame == GOLDEN_FRAME ) - pred_context = 1; else - pred_context = 2; + pred_context = 1; break; #endif |