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move back common constants for lossless_enc*.c into the .h

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Change-Id: I11bc979db691f6518d85e2e1c3ac7f05d69681b0
This commit is contained in:
Pascal Massimino 2015-12-17 15:11:56 +01:00
parent fb4c7832f1
commit b0547ff0b4
3 changed files with 8 additions and 11 deletions
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8
src/dsp/lossless.h
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@ -174,6 +174,14 @@ static WEBP_INLINE uint32_t VP8LSubSampleSize(uint32_t size,
// ----------------------------------------------------------------------------- // -----------------------------------------------------------------------------
// Faster logarithm for integers. Small values use a look-up table. // Faster logarithm for integers. Small values use a look-up table.
// The threshold till approximate version of log_2 can be used.
// Practically, we can get rid of the call to log() as the two values match to
// very high degree (the ratio of these two is 0.99999x).
// Keeping a high threshold for now.
#define APPROX_LOG_WITH_CORRECTION_MAX 65536
#define APPROX_LOG_MAX 4096
#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086
#define LOG_LOOKUP_IDX_MAX 256 #define LOG_LOOKUP_IDX_MAX 256
extern const float kLog2Table[LOG_LOOKUP_IDX_MAX]; extern const float kLog2Table[LOG_LOOKUP_IDX_MAX];
extern const float kSLog2Table[LOG_LOOKUP_IDX_MAX]; extern const float kSLog2Table[LOG_LOOKUP_IDX_MAX];

7
src/dsp/lossless_enc.c
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@ -329,13 +329,6 @@ const uint8_t kPrefixEncodeExtraBitsValue[PREFIX_LOOKUP_IDX_MAX] = {
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126
}; };
// The threshold till approximate version of log_2 can be used.
// Practically, we can get rid of the call to log() as the two values match to
// very high degree (the ratio of these two is 0.99999x).
// Keeping a high threshold for now.
#define APPROX_LOG_WITH_CORRECTION_MAX 65536
#define APPROX_LOG_MAX 4096
#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086
static float FastSLog2Slow(uint32_t v) { static float FastSLog2Slow(uint32_t v) {
assert(v >= LOG_LOOKUP_IDX_MAX); assert(v >= LOG_LOOKUP_IDX_MAX);
if (v < APPROX_LOG_WITH_CORRECTION_MAX) { if (v < APPROX_LOG_WITH_CORRECTION_MAX) {

4
src/dsp/lossless_enc_mips32.c
View File

@ -22,10 +22,6 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define APPROX_LOG_WITH_CORRECTION_MAX 65536
#define APPROX_LOG_MAX 4096
#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086
static float FastSLog2Slow(uint32_t v) { static float FastSLog2Slow(uint32_t v) {
assert(v >= LOG_LOOKUP_IDX_MAX); assert(v >= LOG_LOOKUP_IDX_MAX);
if (v < APPROX_LOG_WITH_CORRECTION_MAX) { if (v < APPROX_LOG_WITH_CORRECTION_MAX) {