backward_references_enc.h: fix WINDOW_SIZE_BITS check

this check was relocated in:
b903b80c Split cost-based backward references in its own file.

quiets -Wundef

Change-Id: I7f7a4773fb8cc77ca9f671b11f50d5db2275d415
This commit is contained in:
James Zern 2017-07-11 15:36:14 -07:00
parent 4ea49f6b82
commit 88c73d8a7a
2 changed files with 1 additions and 1 deletions

View File

@ -26,7 +26,6 @@
#define MAX_ENTROPY (1e30f)
// 1M window (4M bytes) minus 120 special codes for short distances.
#define WINDOW_SIZE_BITS 20
#define WINDOW_SIZE ((1 << WINDOW_SIZE_BITS) - 120)
// Minimum number of pixels for which it is cheaper to encode a

View File

@ -116,6 +116,7 @@ static WEBP_INLINE uint32_t PixOrCopyDistance(const PixOrCopy* const p) {
// If you change this, you need MAX_LENGTH_BITS + WINDOW_SIZE_BITS <= 32 as it
// is used in VP8LHashChain.
#define MAX_LENGTH_BITS 12
#define WINDOW_SIZE_BITS 20
// We want the max value to be attainable and stored in MAX_LENGTH_BITS bits.
#define MAX_LENGTH ((1 << MAX_LENGTH_BITS) - 1)
#if MAX_LENGTH_BITS + WINDOW_SIZE_BITS > 32