Add psnr/ssim tuning option

Add a new encoder control, VP8E_SET_TUNING, to allow the application
to inform the encoder that the material will benefit from certain
tuning. Expose this control as the --tune option to vpxenc. The args
helper is expanded to support enumerated arguments by name or value.

Two tunings are provided by this patch, PSNR (default) and SSIM.
Activity masking is made dependent on setting --tune=ssim, as the
current implementation hurts speed (10%) and PSNR (2.7% avg,
10% peak) too much for it to be a default yet.

Change-Id: I110d969381c4805347ff5a0ffaf1a14ca1965257

1 files changed, 5 insertions, 0 deletions

diff --git a/vp8/vp8_cx_iface.c b/vp8/vp8_cx_iface.c
index ed830cca0..f95920775 100644
--- a/vp8/vp8_cx_iface.c
+++ b/vp8/vp8_cx_iface.c
@@ -37,6 +37,7 @@ struct vp8_extracfg
     unsigned int                arnr_max_frames;    /* alt_ref Noise Reduction Max Frame Count */
     unsigned int                arnr_strength;    /* alt_ref Noise Reduction Strength */
     unsigned int                arnr_type;        /* alt_ref filter type */
+    vp8e_tuning                 tuning;
 
 };
 
@@ -67,6 +68,7 @@ static const struct extraconfig_map extracfg_map[] =
             0,                          /* arnr_max_frames */
             3,                          /* arnr_strength */
             3,                          /* arnr_type*/
+            0,                          /* tuning*/
         }
     }
 };
@@ -336,6 +338,7 @@ static vpx_codec_err_t set_vp8e_config(VP8_CONFIG *oxcf,
     oxcf->arnr_strength =  vp8_cfg.arnr_strength;
     oxcf->arnr_type =      vp8_cfg.arnr_type;
 
+    oxcf->tuning = vp8_cfg.tuning;
 
     /*
         printf("Current VP8 Settings: \n");
@@ -449,6 +452,7 @@ static vpx_codec_err_t set_param(vpx_codec_alg_priv_t *ctx,
         MAP(VP8E_SET_ARNR_MAXFRAMES,        xcfg.arnr_max_frames);
         MAP(VP8E_SET_ARNR_STRENGTH ,        xcfg.arnr_strength);
         MAP(VP8E_SET_ARNR_TYPE     ,        xcfg.arnr_type);
+        MAP(VP8E_SET_TUNING,                xcfg.tuning);
 
     }
 
@@ -1029,6 +1033,7 @@ static vpx_codec_ctrl_fn_map_t vp8e_ctf_maps[] =
     {VP8E_SET_ARNR_MAXFRAMES,           set_param},
     {VP8E_SET_ARNR_STRENGTH ,           set_param},
     {VP8E_SET_ARNR_TYPE     ,           set_param},
+    {VP8E_SET_TUNING,                   set_param},
     { -1, NULL},
 };