tests/examples: Mark some variables only used within their files as static.

libavcodec/dct-test.c

@@ -151,7 +151,7 @@ static const struct algo idct_tab[] = {
 
 #define AANSCALE_BITS 12
 
-uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];
+static uint8_t cropTbl[256 + 2 * MAX_NEG_CROP];
 
 static int64_t gettime(void)
 {

libavcodec/motion-test.c

@@ -38,8 +38,8 @@
 #define WIDTH 64
 #define HEIGHT 64
 
-uint8_t img1[WIDTH * HEIGHT];
-uint8_t img2[WIDTH * HEIGHT];
+static uint8_t img1[WIDTH * HEIGHT];
+static uint8_t img2[WIDTH * HEIGHT];
 
 static void fill_random(uint8_t *tab, int size)
 {

libavformat/output-example.c

@@ -51,11 +51,11 @@ static int sws_flags = SWS_BICUBIC;
 /**************************************************************/
 /* audio output */
 
-float t, tincr, tincr2;
-int16_t *samples;
-uint8_t *audio_outbuf;
-int audio_outbuf_size;
-int audio_input_frame_size;
+static float t, tincr, tincr2;
+static int16_t *samples;
+static uint8_t *audio_outbuf;
+static int audio_outbuf_size;
+static int audio_input_frame_size;
 
 /*
  * add an audio output stream
@@ -190,9 +190,9 @@ static void close_audio(AVFormatContext *oc, AVStream *st)
 /**************************************************************/
 /* video output */
 
-AVFrame *picture, *tmp_picture;
-uint8_t *video_outbuf;
-int frame_count, video_outbuf_size;
+static AVFrame *picture, *tmp_picture;
+static uint8_t *video_outbuf;
+static int frame_count, video_outbuf_size;
 
 /* add a video output stream */
 static AVStream *add_video_stream(AVFormatContext *oc, enum CodecID codec_id)

libavutil/adler32.c

@@ -60,7 +60,9 @@ unsigned long av_adler32_update(unsigned long adler, const uint8_t * buf,
 #include "log.h"
 #include "timer.h"
 #define LEN 7001
-volatile int checksum;
+
+static volatile int checksum;
+
 int main(int argc, char **argv)
 {
     int i;