api change for packet based protocols (such as UDP and RTP)

Originally committed as revision 794 to svn://svn.ffmpeg.org/ffmpeg/trunk

libav/avio.h

+#ifndef AVIO_H
+#define AVIO_H
+
 /* output byte stream handling */
 
 typedef INT64 offset_t;
@@ -8,7 +11,7 @@ struct URLContext {
     struct URLProtocol *prot;
     int flags;        
     int is_streamed;  /* true if streamed (no seek possible), default = false */
-    int packet_size;
+    int max_packet_size;  /* if non zero, the stream is packetized with this max packet size */
     void *priv_data;
 };
 
@@ -22,6 +25,8 @@ typedef struct URLPollEntry {
 
 #define URL_RDONLY 0
 #define URL_WRONLY 1
+#define URL_RDWR   2
+
 int url_open(URLContext **h, const char *filename, int flags);
 int url_read(URLContext *h, unsigned char *buf, int size);
 int url_write(URLContext *h, unsigned char *buf, int size);
@@ -29,6 +34,7 @@ offset_t url_seek(URLContext *h, offset_t pos, int whence);
 int url_close(URLContext *h);
 int url_exist(const char *filename);
 offset_t url_filesize(URLContext *h);
+int url_get_max_packet_size(URLContext *h);
 /* not implemented */
 int url_poll(URLPollEntry *poll_table, int n, int timeout);
 
@@ -59,7 +65,7 @@ typedef struct {
     int eof_reached; /* true if eof reached */
     int write_flag;  /* true if open for writing */
     int is_streamed;
-    int packet_size;
+    int max_packet_size;
 } ByteIOContext;
 
 int init_put_byte(ByteIOContext *s,
@@ -86,6 +92,11 @@ void url_fskip(ByteIOContext *s, offset_t offset);
 offset_t url_ftell(ByteIOContext *s);
 int url_feof(ByteIOContext *s);
 
+#define URL_EOF (-1)
+int url_fgetc(ByteIOContext *s);
+int url_fprintf(ByteIOContext *s, const char *fmt, ...);
+char *url_fgets(ByteIOContext *s, char *buf, int buf_size);
+
 void put_flush_packet(ByteIOContext *s);
 
 int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
@@ -102,28 +113,36 @@ static inline int url_is_streamed(ByteIOContext *s)
 {
     return s->is_streamed;
 }
-/* get the prefered packet size of the device. All I/Os should be done
-   by multiple of this size */
-static inline int url_get_packet_size(ByteIOContext *s)
-{
-    return s->packet_size;
-}
 
 int url_fdopen(ByteIOContext *s, URLContext *h);
 int url_setbufsize(ByteIOContext *s, int buf_size);
 int url_fopen(ByteIOContext *s, const char *filename, int flags);
 int url_fclose(ByteIOContext *s);
 URLContext *url_fileno(ByteIOContext *s);
+int url_fget_max_packet_size(ByteIOContext *s);
 
 int url_open_buf(ByteIOContext *s, UINT8 *buf, int buf_size, int flags);
 int url_close_buf(ByteIOContext *s);
 
+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 **pbuffer);
+
 /* file.c */
 extern URLProtocol file_protocol;
 extern URLProtocol pipe_protocol;
 
 /* udp.c */
 extern URLProtocol udp_protocol;
+int udp_set_remote_url(URLContext *h, const char *uri);
+int udp_get_local_port(URLContext *h);
+int udp_get_file_handle(URLContext *h);
+
+/* tcp.c  */
+extern URLProtocol tcp_protocol;
 
 /* http.c */
 extern URLProtocol http_protocol;
+
+#endif
+