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/*
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** ffplay <EFBFBD><EFBFBD> file <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> rtsp<EFBFBD><EFBFBD>rtp<EFBFBD><EFBFBD>tcp <EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Э<EFBFBD>飬<EFBFBD><EFBFBD> file:ǰ<EFBFBD><EFBFBD>ʾ file Э<EFBFBD>顣
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** URLContext <EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳһ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD>Э<EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩͳһ<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӿڡ<EFBFBD>
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** <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʵ<EFBFBD><EFBFBD> URLContext <EFBFBD>ӿڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> file <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD> URLContext <EFBFBD>ӿ<EFBFBD>
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*/
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#include "../berrno.h"
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#include "avformat.h"
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#include <fcntl.h>
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#ifndef CONFIG_WIN32
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#else
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#include <io.h>
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#define open(fname,oflag,pmode) _open(fname,oflag,pmode)
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#endif
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/*
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** <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>
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*/
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static int file_open(URLContext *h, const char *filename, int flags)
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{
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int access;
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int fd;
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// <EFBFBD><EFBFBD><EFBFBD><EFBFBD>fileЭ<EFBFBD><EFBFBD>
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strstart(filename, "file:", &filename);
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// <EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>־
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if (flags &URL_RDWR)
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access = O_CREAT | O_TRUNC | O_RDWR;
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else if (flags &URL_WRONLY)
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access = O_CREAT | O_TRUNC | O_WRONLY;
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else
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access = O_RDONLY;
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#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)
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access |= O_BINARY;
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#endif
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// <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>
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fd = open(filename, access, 0666);
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if (fd < 0)
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return - ENOENT;
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// <EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>URLContext<EFBFBD><EFBFBD>priv_data
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h->priv_data = (void*)(size_t)fd;
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return 0;
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}
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/* <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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static int file_read(URLContext *h, unsigned char *buf, int size)
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{
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int fd = (size_t)h->priv_data;
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return read(fd, buf, size);
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}
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/* д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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static int file_write(URLContext *h, unsigned char *buf, int size)
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{
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int fd = (size_t)h->priv_data;
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return write(fd, buf, size);
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}
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/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת */
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static offset_t file_seek(URLContext *h, offset_t pos, int whence)
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{
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int fd = (size_t)h->priv_data;
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return lseek(fd, pos, whence);
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}
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/* <EFBFBD>ر<EFBFBD><EFBFBD>ļ<EFBFBD> */
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static int file_close(URLContext *h)
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{
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int fd = (size_t)h->priv_data;
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return close(fd);
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}
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/* FILE<EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>protocol */
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URLProtocol file_protocol =
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{
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"file",
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file_open,
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file_read,
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file_write,
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file_seek,
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file_close,
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};
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