Simple cleanup of the lightfield decoder examples

Move the enum type definition before variable and function definitions.

Mark internal constants and functions as static.

Change-Id: If3e6f6013bc2a54e117dbe4a3c8fc98048cb84e3

examples/lightfield_decoder.c

diff --git a/examples/lightfield_decoder.c b/examples/lightfield_decoder.c
index b757a3c..83a32b2 100644
--- a/examples/lightfield_decoder.c
+++ b/examples/lightfield_decoder.c
@@ -46,14 +46,14 @@
 #include "common/tools_common.h"
 #include "common/video_reader.h"
 
-static const char *exec_name;
-
 enum {
   YUV1D,  // 1D tile output for conformance test.
   YUV,    // Tile output in YUV format.
   NV12,   // Tile output in NV12 format.
 } UENUM1BYTE(OUTPUT_FORMAT);
 
+static const char *exec_name;
+
 void usage_exit(void) {
   fprintf(stderr,
           "Usage: %s <infile> <outfile> <num_references> <tile_list> <output "
@@ -63,8 +63,8 @@
 }
 
 // Output frame size
-const int output_frame_width = 512;
-const int output_frame_height = 512;
+static const int output_frame_width = 512;
+static const int output_frame_height = 512;
 
 static void aom_img_copy_tile(const aom_image_t *src, const aom_image_t *dst,
                               int dst_row_offset, int dst_col_offset) {
@@ -96,11 +96,11 @@
   }
 }
 
-void decode_tile(aom_codec_ctx_t *codec, const unsigned char *frame,
-                 size_t frame_size, int tr, int tc, int ref_idx,
-                 aom_image_t *reference_images, aom_image_t *output,
-                 int *tile_idx, unsigned int *output_bit_depth,
-                 aom_image_t **img_ptr, int output_format) {
+static void decode_tile(aom_codec_ctx_t *codec, const unsigned char *frame,
+                        size_t frame_size, int tr, int tc, int ref_idx,
+                        aom_image_t *reference_images, aom_image_t *output,
+                        int *tile_idx, unsigned int *output_bit_depth,
+                        aom_image_t **img_ptr, int output_format) {
   AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_TILE_MODE, 1);
   AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1D_EXT_TILE_DEBUG, 1);
   AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_DECODE_TILE_ROW, tr);

examples/lightfield_tile_list_decoder.c

diff --git a/examples/lightfield_tile_list_decoder.c b/examples/lightfield_tile_list_decoder.c
index 9e333a8..5b15ae0 100644
--- a/examples/lightfield_tile_list_decoder.c
+++ b/examples/lightfield_tile_list_decoder.c
@@ -37,14 +37,14 @@
 #include "common/tools_common.h"
 #include "common/video_reader.h"
 
-static const char *exec_name;
-
 enum {
   YUV1D,  // 1D tile output for conformance test.
   YUV,    // Tile output in YUV format.
   NV12,   // Tile output in NV12 format.
 } UENUM1BYTE(OUTPUT_FORMAT);
 
+static const char *exec_name;
+
 void usage_exit(void) {
   fprintf(stderr,
           "Usage: %s <infile> <outfile> <num_references> <num_tile_lists> "