declare and use UID type

Originally committed as revision 5836 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mxf.c

@@ -43,17 +43,19 @@
 #include "dsputil.h"
 #include "riff.h"
 
+typedef DECLARE_ALIGNED_16(uint8_t, UID[16]);
+
 typedef struct {
     AVStream *stream;
-    uint8_t track_uid[16];
-    uint8_t sequence_uid[16];
+    UID track_uid;
+    UID sequence_uid;
     int track_id;
     int track_number;
 } MXFTrack;
 
 typedef struct {
-    DECLARE_ALIGNED_16(uint8_t, essence_container[16]);
-    DECLARE_ALIGNED_16(uint8_t, essence_compression[16]);
+    UID essence_container;
+    UID essence_compression;
     enum CodecType codec_type;
     AVRational sample_rate;
     AVRational aspect_ratio;
@@ -75,20 +77,22 @@ typedef struct {
 } MXFContext;
 
 typedef struct {
-    DECLARE_ALIGNED_16(uint8_t, key[16]);
+    UID key;
     offset_t offset;
     uint64_t length;
 } KLVPacket;
 
-static const uint8_t mxf_metadata_source_package_key[]           = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x37, 0x00 };
-static const uint8_t mxf_metadata_sequence_key[]                 = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0F, 0x00 };
-static const uint8_t mxf_metadata_generic_sound_descriptor_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x42, 0x00 };
-static const uint8_t mxf_metadata_cdci_descriptor_key[]          = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x28, 0x00 };
-static const uint8_t mxf_metadata_mpegvideo_descriptor_key[]     = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x51, 0x00 };
-static const uint8_t mxf_metadata_wave_descriptor_key[]          = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x00 };
-static const uint8_t mxf_metadata_track_key[]                    = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x3b, 0x00 };
-static const uint8_t mxf_header_partition_pack_key[]             = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01, 0x01, 0x02 };
-static const uint8_t mxf_essence_element_key[]                   = { 0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01 };
+static const UID mxf_metadata_source_package_key           = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x37, 0x00 };
+static const UID mxf_metadata_sequence_key                 = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0F, 0x00 };
+static const UID mxf_metadata_generic_sound_descriptor_key = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x42, 0x00 };
+static const UID mxf_metadata_cdci_descriptor_key          = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x28, 0x00 };
+static const UID mxf_metadata_mpegvideo_descriptor_key     = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x51, 0x00 };
+static const UID mxf_metadata_wave_descriptor_key          = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x00 };
+static const UID mxf_metadata_track_key                    = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x3b, 0x00 };
+
+/* partial keys to match */
+static const uint8_t mxf_header_partition_pack_key[]       = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01, 0x01, 0x02 };
+static const uint8_t mxf_essence_element_key[]             = { 0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01 };
 
 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))