Auto-adaptive encoder frame resizing logic

Note: This feature is still in development.

Add an option for the encoder to decide the resolution
at which to encode each frame.

Each KF/GF/ARF goup is tested to see if it would be
better encoded at a lower resolution. At present, each
KF/GF/ARF is coded first at full-size and if the coded
size exceeds a threshold (twice target data rate) at
the maximum active Q then the entire group is encoded
at lower resolution.

This feature is enabled in vpxenc by setting:
  --resize-allowed=1

In addition, if the vpxenc command line also specifies
valid frame dimensions using:
  --resize-width=XXXX & --resize_height=YYYY
then *all* frames will be encoded at this resolution.

Change-Id: I13f341e0a82512f9e84e144e0f3b5aed8a65402b

1 files changed, 8 insertions, 1 deletions

diff --git a/vp9/encoder/vp9_firstpass.h b/vp9/encoder/vp9_firstpass.h
index 34767706a..08e7a8bf1 100644
--- a/vp9/encoder/vp9_firstpass.h
+++ b/vp9/encoder/vp9_firstpass.h
@@ -118,8 +118,8 @@ typedef struct {
   int kf_zeromotion_pct;
   int last_kfgroup_zeromotion_pct;
   int gf_zeromotion_pct;
-  int baseline_worst_quality;
   int active_worst_quality;
+  int baseline_active_worst_quality;
   int extend_minq;
   int extend_maxq;
 
@@ -138,6 +138,13 @@ void vp9_rc_get_second_pass_params(struct VP9_COMP *cpi);
 
 // Post encode update of the rate control parameters for 2-pass
 void vp9_twopass_postencode_update(struct VP9_COMP *cpi);
+
+void vp9_init_subsampling(struct VP9_COMP *cpi);
+
+void calculate_coded_size(struct VP9_COMP *cpi,
+                          int *scaled_frame_width,
+                          int *scaled_frame_height);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif