shithub: libvpx

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ref: 44195fda71a1784544d797cd331b625c083f6f89
parent: 6e21ca7635d7df38408bd67911a615a6eca684c7
author: Dmitry Kovalev <[email protected]>
date: Fri Oct 11 07:19:58 EDT 2013 

Adding const to the input argument of all 1D transforms.

Also adding static to iadst16_1d and fadst16 functions.

Change-Id: I13c7df3b776f0f8efc6e80099bdb0a2f6d29edaf


--- a/vp9/common/vp9_idct.c
+++ b/vp9/common/vp9_idct.c
@@ -96,7 +96,7 @@
   }
 }
 
-static void idct4_1d(int16_t *input, int16_t *output) {
+static void idct4_1d(const int16_t *input, int16_t *output) {
   int16_t step[4];
   int temp1, temp2;
   // stage 1
@@ -156,7 +156,7 @@
   }
 }
 
-static void idct8_1d(int16_t *input, int16_t *output) {
+static void idct8_1d(const int16_t *input, int16_t *output) {
   int16_t step1[8], step2[8];
   int temp1, temp2;
   // stage 1
@@ -238,7 +238,7 @@
   }
 }
 
-static void iadst4_1d(int16_t *input, int16_t *output) {
+static void iadst4_1d(const int16_t *input, int16_t *output) {
   int s0, s1, s2, s3, s4, s5, s6, s7;
 
   int x0 = input[0];
@@ -311,7 +311,7 @@
                                   + dest[j * dest_stride + i]);
   }
 }
-static void iadst8_1d(int16_t *input, int16_t *output) {
+static void iadst8_1d(const int16_t *input, int16_t *output) {
   int s0, s1, s2, s3, s4, s5, s6, s7;
 
   int x0 = input[7];
@@ -446,7 +446,7 @@
   }
 }
 
-static void idct16_1d(int16_t *input, int16_t *output) {
+static void idct16_1d(const int16_t *input, int16_t *output) {
   int16_t step1[16], step2[16];
   int temp1, temp2;
 
@@ -635,7 +635,7 @@
   }
 }
 
-void iadst16_1d(int16_t *input, int16_t *output) {
+static void iadst16_1d(const int16_t *input, int16_t *output) {
   int s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15;
 
   int x0 = input[15];
@@ -878,7 +878,7 @@
   }
 }
 
-static void idct32_1d(int16_t *input, int16_t *output) {
+static void idct32_1d(const int16_t *input, int16_t *output) {
   int16_t step1[32], step2[32];
   int temp1, temp2;
 
--- a/vp9/common/vp9_idct.h
+++ b/vp9/common/vp9_idct.h
@@ -81,7 +81,7 @@
   return rv;
 }
 
-typedef void (*transform_1d)(int16_t*, int16_t*);
+typedef void (*transform_1d)(const int16_t*, int16_t*);
 
 typedef struct {
   transform_1d cols, rows;  // vertical and horizontal
--- a/vp9/encoder/vp9_dct.c
+++ b/vp9/encoder/vp9_dct.c
@@ -17,7 +17,7 @@
 #include "vp9/common/vp9_blockd.h"
 #include "vp9/common/vp9_idct.h"
 
-static void fdct4(int16_t *input, int16_t *output) {
+static void fdct4(const int16_t *input, int16_t *output) {
   int16_t step[4];
   int temp1, temp2;
 
@@ -102,7 +102,7 @@
   }
 }
 
-static void fadst4(int16_t *input, int16_t *output) {
+static void fadst4(const int16_t *input, int16_t *output) {
   int x0, x1, x2, x3;
   int s0, s1, s2, s3, s4, s5, s6, s7;
 
@@ -183,7 +183,7 @@
     vp9_short_fdct4x4_c(input + 4, output + 16, pitch);
 }
 
-static void fdct8(int16_t *input, int16_t *output) {
+static void fdct8(const int16_t *input, int16_t *output) {
   /*canbe16*/ int s0, s1, s2, s3, s4, s5, s6, s7;
   /*needs32*/ int t0, t1, t2, t3;
   /*canbe16*/ int x0, x1, x2, x3;
@@ -486,7 +486,7 @@
   }
 }
 
-static void fadst8(int16_t *input, int16_t *output) {
+static void fadst8(const int16_t *input, int16_t *output) {
   int s0, s1, s2, s3, s4, s5, s6, s7;
 
   int x0 = input[7];
@@ -654,7 +654,7 @@
 
 
 // Rewrote to use same algorithm as others.
-static void fdct16(int16_t in[16], int16_t out[16]) {
+static void fdct16(const int16_t in[16], int16_t out[16]) {
   /*canbe16*/ int step1[8];
   /*canbe16*/ int step2[8];
   /*canbe16*/ int step3[8];
@@ -795,7 +795,7 @@
   out[15] = dct_const_round_shift(temp2);
 }
 
-void fadst16(int16_t *input, int16_t *output) {
+static void fadst16(const int16_t *input, int16_t *output) {
   int s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15;
 
   int x0 = input[15];
@@ -1003,7 +1003,7 @@
   return rv;
 }
 
-static void dct32_1d(int *input, int *output, int round) {
+static void dct32_1d(const int *input, int *output, int round) {
   int step[32];
   // Stage 1
   step[0] = input[0] + input[(32 - 1)];