Comments for alt ref flags.
Clarify what the alt ref flags do when encoding.
Change-Id: I71f78e0f42edae633fb91840f29dfbe64362c44c
diff --git a/vp8/encoder/onyx_int.h b/vp8/encoder/onyx_int.h
index a9eedf3..b3a09ec 100644
--- a/vp8/encoder/onyx_int.h
+++ b/vp8/encoder/onyx_int.h
@@ -278,14 +278,14 @@
unsigned int source_frame_flags;
YV12_BUFFER_CONFIG scaled_source;
- int source_buffer_count;
- int source_encode_index;
- int source_alt_ref_pending;
- int source_alt_ref_active;
+ int source_buffer_count; // number of src_buffers in use for lagged encoding
+ int source_encode_index; // index of buffer in src_buffer to encode
+ int source_alt_ref_pending; // frame in src_buffers has been identified to be encoded as an alt ref
+ int source_alt_ref_active; // an alt ref frame has been encoded and is usable
- int last_alt_ref_sei;
- int is_src_frame_alt_ref;
- int is_next_src_alt_ref;
+ int last_alt_ref_sei; // index into src_buffers of frame used as alt reference
+ int is_src_frame_alt_ref; // source of frame to encode is an exact copy of an alt ref frame
+ int is_next_src_alt_ref; // source of next frame to encode is an exact copy of an alt ref frame
int gold_is_last; // golden frame same as last frame ( short circuit gold searches)
int alt_is_last; // Alt reference frame same as last ( short circuit altref search)
