fix compiler error on Mac of missing endian.h

README.md

@@ -33,6 +33,19 @@ Compile the source code using this command (all one line):
 
     g++ -o untrunc file.cpp main.cpp track.cpp atom.cpp mp4.cpp -L/usr/local/lib -lavformat -lavcodec -lavutil
 
+## Installing on Mac
+
+Download the source code from GitHub at https://github.com/ponchio/untrunc and unzip the source code.
+
+    cd untrunc-master
+
+Install libav using homebrew
+
+    brew install libav
+
+Build untrunc
+
+    g++ -o untrunc file.cpp main.cpp track.cpp atom.cpp mp4.cpp -L/usr/local/lib -lavformat -lavcodec -lavutil
 
 ## Installing on other operating system (Manual libav installation)
 

atom.cpp

@@ -7,7 +7,7 @@
 #include <iostream>
 
 #include <assert.h>
-#include <endian.h>
+#include "uendian.h"
 
 using namespace std;
 

file.cpp

@@ -20,7 +20,7 @@
 
 #include "file.h"
 #include <string>
-#include <endian.h>
+#include "uendian.h"
 
 using namespace std;
 

track.cpp

@@ -25,7 +25,7 @@
 #include <vector>
 #include <string.h>
 #include <assert.h>
-#include <endian.h>
+#include "uendian.h"
 
 #define __STDC_LIMIT_MACROS 1
 #define __STDC_CONSTANT_MACROS 1
@@ -201,7 +201,7 @@ bool Codec::matchSample(unsigned char *start, int maxlength) {
 
 int Codec::getLength(unsigned char *start, int maxlength) {
 	if(name == "mp4a") {
-		AVFrame *frame = avcodec_alloc_frame();
+		AVFrame *frame = av_frame_alloc();
 		if(!frame)
 			throw string("Could not create AVFrame");
 		AVPacket avp;
@@ -217,7 +217,7 @@ int Codec::getLength(unsigned char *start, int maxlength) {
 	} else if(name == "mp4v") {
 
 		/*     THIS DOES NOT SEEM TO WORK FOR SOME UNKNOWN REASON. IT JUST CONSUMES ALL BYTES.
-  *     AVFrame *frame = avcodec_alloc_frame();
+  *     AVFrame *frame = av_frame_alloc();
 		if(!frame)
 			throw string("Could not create AVFrame");
 		AVPacket avp;

uendian.h

@@ -0,0 +1,33 @@
+#ifndef UENDIAN_H__
+#define UENDIAN_H__
+#include <inttypes.h>
+#include <string.h>
+
+#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
+#include <endian.h>
+#elif __FreeBSD__
+#include <sys/endian.h>
+#elif defined(__APPLE__) && defined(__MACH__)
+
+#include <libkern/OSByteOrder.h>
+
+#define htobe16(x) OSSwapHostToBigInt16(x)
+#define htole16(x) OSSwapHostToLittleInt16(x)
+#define be16toh(x) OSSwapBigToHostInt16(x)
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#define htobe32(x) OSSwapHostToBigInt32(x)
+#define htole32(x) OSSwapHostToLittleInt32(x)
+#define be32toh(x) OSSwapBigToHostInt32(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#define htobe64(x) OSSwapHostToBigInt64(x)
+#define htole64(x) OSSwapHostToLittleInt64(x)
+#define be64toh(x) OSSwapBigToHostInt64(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
+
+#else
+#error Couldn't find any appropriate endian.h
+#endif // PLATFORMS
+
+#endif // UENDIAN_H__