Replace two #define's by inline functions

Originally committed as revision 10264 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/alac.c

@@ -269,12 +269,15 @@ static void bastardized_rice_decompress(ALACContext *alac,
     }
 }
 
-#define SIGN_EXTENDED32(val, bits) ((val << (32 - bits)) >> (32 - bits))
+static inline int32_t sign_extended32(int32_t val, int bits)
+{
+    return (val << (32 - bits)) >> (32 - bits);
+}
 
-#define SIGN_ONLY(v) \
-                     ((v < 0) ? (-1) : \
-                                ((v > 0) ? (1) : \
-                                           (0)))
+static inline int sign_only(int v)
+{
+    return v ? FFSIGN(v) : 0;
+}
 
 static void predictor_decompress_fir_adapt(int32_t *error_buffer,
                                            int32_t *buffer_out,
@@ -310,7 +313,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
             prev_value = buffer_out[i];
             error_value = error_buffer[i+1];
             buffer_out[i+1] =
-                SIGN_EXTENDED32((prev_value + error_value), readsamplesize);
+                sign_extended32((prev_value + error_value), readsamplesize);
         }
         return;
     }
@@ -321,7 +324,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
             int32_t val;
 
             val = buffer_out[i] + error_buffer[i+1];
-            val = SIGN_EXTENDED32(val, readsamplesize);
+            val = sign_extended32(val, readsamplesize);
             buffer_out[i+1] = val;
         }
 
@@ -356,7 +359,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
             outval = (1 << (predictor_quantitization-1)) + sum;
             outval = outval >> predictor_quantitization;
             outval = outval + buffer_out[0] + error_val;
-            outval = SIGN_EXTENDED32(outval, readsamplesize);
+            outval = sign_extended32(outval, readsamplesize);
 
             buffer_out[predictor_coef_num+1] = outval;
 
@@ -365,7 +368,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
 
                 while (predictor_num >= 0 && error_val > 0) {
                     int val = buffer_out[0] - buffer_out[predictor_coef_num - predictor_num];
-                    int sign = SIGN_ONLY(val);
+                    int sign = sign_only(val);
 
                     predictor_coef_table[predictor_num] -= sign;
 
@@ -381,7 +384,7 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
 
                 while (predictor_num >= 0 && error_val < 0) {
                     int val = buffer_out[0] - buffer_out[predictor_coef_num - predictor_num];
-                    int sign = - SIGN_ONLY(val);
+                    int sign = - sign_only(val);
 
                     predictor_coef_table[predictor_num] -= sign;
 
@@ -570,7 +573,7 @@ static int alac_decode_frame(AVCodecContext *avctx,
                     int32_t audiobits;
 
                     audiobits = get_bits(&alac->gb, alac->setinfo_sample_size);
-                    audiobits = SIGN_EXTENDED32(audiobits, readsamplesize);
+                    audiobits = sign_extended32(audiobits, readsamplesize);
 
                     alac->outputsamples_buffer[chan][i] = audiobits;
                 }