GetVersion() methods for mux and demux

Also use the same in example binaries.

Change-Id: Id4bb4c4231a6b8fe9ed4370a6f46567c52a04a17

src/demux/demux.c

@@ -21,6 +21,10 @@
 extern "C" {
 #endif
 
+#define DMUX_MAJ_VERSION 0
+#define DMUX_MIN_VERSION 1
+#define DMUX_REV_VERSION 0
+
 typedef struct {
   size_t start_;        // start location of the data
   size_t end_;          // end location
@@ -88,6 +92,12 @@ static const ChunkParser kMasterChunks[] = {
   { { '0', '0', '0', '0' }, NULL,             NULL },
 };
 
+//------------------------------------------------------------------------------
+
+int WebPGetDemuxVersion(void) {
+  return (DMUX_MAJ_VERSION << 16) | (DMUX_MIN_VERSION << 8) | DMUX_REV_VERSION;
+}
+
 // -----------------------------------------------------------------------------
 // MemBuffer
 

src/mux/muxi.h

@@ -24,6 +24,10 @@ extern "C" {
 //------------------------------------------------------------------------------
 // Defines and constants.
 
+#define MUX_MAJ_VERSION 0
+#define MUX_MIN_VERSION 1
+#define MUX_REV_VERSION 0
+
 // Chunk object.
 typedef struct WebPChunk WebPChunk;
 struct WebPChunk {

src/mux/muxinternal.c

@@ -36,6 +36,12 @@ const ChunkInfo kChunks[] = {
   { NIL_TAG,                       WEBP_CHUNK_NIL,     UNDEFINED_CHUNK_SIZE }
 };
 
+//------------------------------------------------------------------------------
+
+int WebPGetMuxVersion(void) {
+  return (MUX_MAJ_VERSION << 16) | (MUX_MIN_VERSION << 8) | MUX_REV_VERSION;
+}
+
 //------------------------------------------------------------------------------
 // Life of a chunk object.
 

src/webp/demux.h

@@ -62,6 +62,12 @@ typedef enum WebPFormatFeature WebPFormatFeature;
 typedef struct WebPIterator WebPIterator;
 typedef struct WebPChunkIterator WebPChunkIterator;
 
+//------------------------------------------------------------------------------
+
+// Returns the version number of the demux library, packed in hexadecimal using
+// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507.
+WEBP_EXTERN(int) WebPGetDemuxVersion(void);
+
 //------------------------------------------------------------------------------
 // Life of a Demux object
 

src/webp/mux.h

@@ -87,6 +87,12 @@ enum WebPChunkId {
   WEBP_CHUNK_NIL
 };
 
+//------------------------------------------------------------------------------
+
+// Returns the version number of the mux library, packed in hexadecimal using
+// 8bits or each of major/minor/revision. E.g: v2.5.7 is 0x020507.
+WEBP_EXTERN(int) WebPGetMuxVersion(void);
+
 //------------------------------------------------------------------------------
 // Life of a Mux object