extract duration if available

[ffmpeg] / libavformat / avio.h

diff --git a/libavformat/avio.h b/libavformat/avio.h
index f668c0ceb01c07268e07657e9e7c29f0f43248b0..bb9b4574f7a63b0a7d0a673906b5c1acbbd147c8 100644 (file)
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -70,14 +70,18 @@ typedef struct {
     unsigned char *buf_ptr, *buf_end;
     void *opaque;
     int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
-    void (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
-    int (*seek)(void *opaque, offset_t offset, int whence);
+    int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
+    offset_t (*seek)(void *opaque, offset_t offset, int whence);
     offset_t pos; /* position in the file of the current buffer */
     int must_flush; /* true if the next seek should flush */
     int eof_reached; /* true if eof reached */
     int write_flag;  /* true if open for writing */
     int is_streamed;
     int max_packet_size;
+    unsigned long checksum;
+    unsigned char *checksum_ptr;
+    unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
+    int error;         ///< contains the error code or 0 if no error happened
 } ByteIOContext;
 
 int init_put_byte(ByteIOContext *s,
@@ -86,8 +90,8 @@ int init_put_byte(ByteIOContext *s,
                   int write_flag,
                   void *opaque,
                   int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
-                  void (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
-                  int (*seek)(void *opaque, offset_t offset, int whence));
+                  int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
+                  offset_t (*seek)(void *opaque, offset_t offset, int whence));
 
 void put_byte(ByteIOContext *s, int b);
 void put_buffer(ByteIOContext *s, const unsigned char *buf, int size);
@@ -105,7 +109,9 @@ void put_strz(ByteIOContext *s, const char *buf);
 offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence);
 void url_fskip(ByteIOContext *s, offset_t offset);
 offset_t url_ftell(ByteIOContext *s);
+offset_t url_fsize(ByteIOContext *s);
 int url_feof(ByteIOContext *s);
+int url_ferror(ByteIOContext *s);
 
 #define URL_EOF (-1)
 int url_fgetc(ByteIOContext *s);
@@ -150,6 +156,10 @@ int url_open_dyn_buf(ByteIOContext *s);
 int url_open_dyn_packet_buf(ByteIOContext *s, int max_packet_size);
 int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer);
 
+unsigned long get_checksum(ByteIOContext *s);
+void init_checksum(ByteIOContext *s, unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum);
+unsigned long update_adler32(unsigned long adler, const uint8_t *buf, unsigned int len);
+
 /* file.c */
 extern URLProtocol file_protocol;
 extern URLProtocol pipe_protocol;