celp_math: Move ff_cos() to the only place it is used

libavcodec/Makefile

@@ -171,7 +171,7 @@ OBJS-$(CONFIG_FOURXM_DECODER)          += 4xm.o
 OBJS-$(CONFIG_FRAPS_DECODER)           += fraps.o
 OBJS-$(CONFIG_FRWU_DECODER)            += frwu.o
 OBJS-$(CONFIG_G723_1_DECODER)          += g723_1.o acelp_vectors.o \
-                                          celp_filters.o celp_math.o
+                                          celp_filters.o
 OBJS-$(CONFIG_GIF_DECODER)             += gifdec.o lzw.o
 OBJS-$(CONFIG_GIF_ENCODER)             += gif.o lzwenc.o
 OBJS-$(CONFIG_GSM_DECODER)             += gsmdec.o gsmdec_data.o msgsmdec.o
@@ -367,7 +367,7 @@ OBJS-$(CONFIG_TRUESPEECH_DECODER)      += truespeech.o
 OBJS-$(CONFIG_TSCC_DECODER)            += tscc.o msrledec.o
 OBJS-$(CONFIG_TSCC2_DECODER)           += tscc2.o
 OBJS-$(CONFIG_TTA_DECODER)             += tta.o
-OBJS-$(CONFIG_TWINVQ_DECODER)          += twinvq.o celp_math.o
+OBJS-$(CONFIG_TWINVQ_DECODER)          += twinvq.o
 OBJS-$(CONFIG_TXD_DECODER)             += txd.o s3tc.o
 OBJS-$(CONFIG_ULTI_DECODER)            += ulti.o
 OBJS-$(CONFIG_UTVIDEO_DECODER)         += utvideodec.o utvideo.o

libavcodec/celp_math.c

@@ -28,21 +28,6 @@
 #include "celp_math.h"
 #include "libavutil/common.h"
 
-/**
- * Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
- */
-static const int16_t tab_cos[65] =
-{
-  32767,  32738,  32617,  32421,  32145,  31793,  31364,  30860,
-  30280,  29629,  28905,  28113,  27252,  26326,  25336,  24285,
-  23176,  22011,  20793,  19525,  18210,  16851,  15451,  14014,
-  12543,  11043,   9515,   7965,   6395,   4810,   3214,   1609,
-      1,  -1607,  -3211,  -4808,  -6393,  -7962,  -9513, -11040,
- -12541, -14012, -15449, -16848, -18207, -19523, -20791, -22009,
- -23174, -24283, -25334, -26324, -27250, -28111, -28904, -29627,
- -30279, -30858, -31363, -31792, -32144, -32419, -32616, -32736, -32768,
-};
-
 static const uint16_t exp2a[]=
 {
      0,  1435,  2901,  4400,  5931,  7496,  9096, 10730,
@@ -59,16 +44,6 @@ static const uint16_t exp2b[]=
  17176, 17898, 18620, 19343, 20066, 20790, 21514, 22238,
 };
 
-int16_t ff_cos(uint16_t arg)
-{
-    uint8_t offset= arg;
-    uint8_t ind = arg >> 8;
-
-    assert(arg <= 0x3fff);
-
-    return tab_cos[ind] + (offset * (tab_cos[ind+1] - tab_cos[ind]) >> 8);
-}
-
 int ff_exp2(uint16_t power)
 {
     unsigned int result= exp2a[power>>10] + 0x10000;

libavcodec/celp_math.h

@@ -25,14 +25,6 @@
 
 #include <stdint.h>
 
-/**
- * fixed-point implementation of cosine in [0; PI) domain.
- * @param arg fixed-point cosine argument, 0 <= arg < 0x4000
- *
- * @return value of (1<<15) * cos(arg * PI / (1<<14)), -0x8000 <= result <= 0x7fff
- */
-int16_t ff_cos(uint16_t arg);
-
 /**
  * fixed-point implementation of exp2(x) in [0; 1] domain.
  * @param power argument to exp2, 0 <= power <= 0x7fff

libavcodec/lsp.c

@@ -55,6 +55,30 @@ void ff_set_min_dist_lsf(float *lsf, double min_spacing, int size)
         prev = lsf[i] = FFMAX(lsf[i], prev + min_spacing);
 }
 
+
+/* Cosine table: base_cos[i] = (1 << 15) * cos(i * PI / 64) */
+static const int16_t tab_cos[65] =
+{
+  32767,  32738,  32617,  32421,  32145,  31793,  31364,  30860,
+  30280,  29629,  28905,  28113,  27252,  26326,  25336,  24285,
+  23176,  22011,  20793,  19525,  18210,  16851,  15451,  14014,
+  12543,  11043,   9515,   7965,   6395,   4810,   3214,   1609,
+      1,  -1607,  -3211,  -4808,  -6393,  -7962,  -9513, -11040,
+ -12541, -14012, -15449, -16848, -18207, -19523, -20791, -22009,
+ -23174, -24283, -25334, -26324, -27250, -28111, -28904, -29627,
+ -30279, -30858, -31363, -31792, -32144, -32419, -32616, -32736, -32768,
+};
+
+static int16_t ff_cos(uint16_t arg)
+{
+    uint8_t offset= arg;
+    uint8_t ind = arg >> 8;
+
+    assert(arg <= 0x3fff);
+
+    return tab_cos[ind] + (offset * (tab_cos[ind+1] - tab_cos[ind]) >> 8);
+}
+
 void ff_acelp_lsf2lsp(int16_t *lsp, const int16_t *lsf, int lp_order)
 {
     int i;