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Implement url_open_protocol(), which is basiclly the former url_open()

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but which opens a URLProtocol instead of a filename. url_open() is
reimplemented to call url_open_protocol(). See discussion on
"url_open_protocol" on ffmpeg-devel.

Originally committed as revision 14857 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2008-08-19 23:44:23 +00:00
parent b76e3424ca
commit ba99cfc213
2 changed files with 39 additions and 32 deletions
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69
libavformat/avio.c
View File

@ -59,41 +59,12 @@ int register_protocol(URLProtocol *protocol)
return 0; return 0;
} }
int url_open(URLContext **puc, const char *filename, int flags) int url_open_protocol (URLContext **puc, struct URLProtocol *up,
const char *filename, int flags)
{ {
URLContext *uc; URLContext *uc;
URLProtocol *up;
const char *p;
char proto_str[128], *q;
int err; int err;
p = filename;
q = proto_str;
while (*p != '\0' && *p != ':') {
/* protocols can only contain alphabetic chars */
if (!isalpha(*p))
goto file_proto;
if ((q - proto_str) < sizeof(proto_str) - 1)
*q++ = *p;
p++;
}
/* if the protocol has length 1, we consider it is a dos drive */
if (*p == '\0' || (q - proto_str) <= 1) {
file_proto:
strcpy(proto_str, "file");
} else {
*q = '\0';
}
up = first_protocol;
while (up != NULL) {
if (!strcmp(proto_str, up->name))
goto found;
up = up->next;
}
err = AVERROR(ENOENT);
goto fail;
found:
uc = av_malloc(sizeof(URLContext) + strlen(filename) + 1); uc = av_malloc(sizeof(URLContext) + strlen(filename) + 1);
if (!uc) { if (!uc) {
err = AVERROR(ENOMEM); err = AVERROR(ENOMEM);
@ -117,7 +88,7 @@ int url_open(URLContext **puc, const char *filename, int flags)
//We must be carefull here as url_seek() could be slow, for example for http //We must be carefull here as url_seek() could be slow, for example for http
if( (flags & (URL_WRONLY | URL_RDWR)) if( (flags & (URL_WRONLY | URL_RDWR))
|| !strcmp(proto_str, "file")) || !strcmp(up->name, "file"))
if(!uc->is_streamed && url_seek(uc, 0, SEEK_SET) < 0) if(!uc->is_streamed && url_seek(uc, 0, SEEK_SET) < 0)
uc->is_streamed= 1; uc->is_streamed= 1;
*puc = uc; *puc = uc;
@ -127,6 +98,40 @@ int url_open(URLContext **puc, const char *filename, int flags)
return err; return err;
} }
int url_open(URLContext **puc, const char *filename, int flags)
{
URLProtocol *up;
const char *p;
char proto_str[128], *q;
p = filename;
q = proto_str;
while (*p != '\0' && *p != ':') {
/* protocols can only contain alphabetic chars */
if (!isalpha(*p))
goto file_proto;
if ((q - proto_str) < sizeof(proto_str) - 1)
*q++ = *p;
p++;
}
/* if the protocol has length 1, we consider it is a dos drive */
if (*p == '\0' || (q - proto_str) <= 1) {
file_proto:
strcpy(proto_str, "file");
} else {
*q = '\0';
}
up = first_protocol;
while (up != NULL) {
if (!strcmp(proto_str, up->name))
return url_open_protocol (puc, up, filename, flags);
up = up->next;
}
*puc = NULL;
return AVERROR(ENOENT);
}
int url_read(URLContext *h, unsigned char *buf, int size) int url_read(URLContext *h, unsigned char *buf, int size)
{ {
int ret; int ret;

2
libavformat/avio.h
View File

@ -62,6 +62,8 @@ typedef struct URLPollEntry {
typedef int URLInterruptCB(void); typedef int URLInterruptCB(void);
int url_open_protocol (URLContext **puc, struct URLProtocol *up,
const char *filename, int flags);
int url_open(URLContext **h, const char *filename, int flags); int url_open(URLContext **h, const char *filename, int flags);
int url_read(URLContext *h, unsigned char *buf, int size); int url_read(URLContext *h, unsigned char *buf, int size);
int url_write(URLContext *h, unsigned char *buf, int size); int url_write(URLContext *h, unsigned char *buf, int size);