new ed17

1 files changed, 20 insertions, 6 deletions

diff --git a/inc/vdefine.h b/inc/vdefine.h
index 9cd812d..be6c4b6 100644
--- a/inc/vdefine.h
+++ b/inc/vdefine.h
@@ -17,18 +17,32 @@
 extern const char *mp4_box_type_all[];
 extern int count_type;
 
-int is_mpeg_ts_each(const char *buff_each, size_t size_each, const char *buff, size_t size);
+/*To find that whether the initial size bytes pointed to by buff satisfies the rules of MPEG-TS AV Container
+ * by supposing that its first 1 byte is sync_byte in ts header.*/
+int is_mpeg_ts_each(const char *buff, size_t size);
+/*To identify whether the whole byte stream belongs to MPEG_TS container*/
 int is_mpeg_ts(const char* buff, size_t size);
 
-void *memchr_flv(const char *buff_each, size_t size_each);
-int is_flv_each(const char* buff_each, size_t size_each,const char *buff);
+/*Scanning the initial size bytes of the memory area pointed to by buff for the first instance of 0x08, 0x09 or 0x12*/
+void *memchr_flv(const char *buff, size_t size);
+/*To find that whether the initial size bytes pointed to by buff satisfies the rules of FLV AV Container
+ * by supposing that its first 1 byte is TagType in FLV Tag Header.*/
+int is_flv_each(const char* buff, size_t size);
+/*To identify whether the whole byte stream belongs to FLV container*/
 int is_flv(const char* buff, size_t size);
 
+/*whether all of those initial 4 bytes of the memory area pointed to by buff are number or lower case */
 int is_mp4_part_boxtype(const char *buff);
+/*whether one byte is number or lower case*/
 int char_is_mp4(char c);
-int is_mp4_part_4char(const char *buff_part);
-void *memmem_mp4(const char *buff_each, size_t size_each);
-int is_mp4_each(const char* buff_each, size_t size_each, const char *buff);
+/*whether the initial several bytes of the memory area pointed to by buff_part is one kind of Boxtype of MP4 file*/
+int is_mp4_part_4char(const char *buff);
+/*Scanning the initial size bytes of the memory area pointed to by buff for the first instance of continuous 4 bytes of number or lower case*/
+void *memmem_mp4(const char *buff, size_t size);
+/*To find that whether the initial size bytes pointed to by buff satisfies the rules of MP4 AV Container
+ * by supposing that its first 4 byte is Boxtype in Box of MP4 file.*/
+int is_mp4_each(const char* buff, size_t size);
+/*To identify whether the whole byte stream belongs to MP4 container*/
 int is_mp4(const char* buff, size_t size);
 
 int AV_container_identify(const char* buff, size_t size);