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authorReimar Döffinger <Reimar.Doeffinger@gmx.de>2010-01-23 10:23:47 +0000
committerReimar Döffinger <Reimar.Doeffinger@gmx.de>2010-01-23 10:23:47 +0000
commitddb901b74d7a71b6d4968f7490d1932821b5f703 (patch)
treefdf6efce0fecdb92cd405c4b217d79559289309c
parent98287358e941a2173e05f7efd3630693b997459b (diff)
downloadffmpeg-ddb901b74d7a71b6d4968f7490d1932821b5f703.tar.gz
Make url_read_complete retry on EAGAIN and return how much data it read
if it reached EOF, making it useful in more cases. Originally committed as revision 21393 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--libavformat/avio.c6
-rw-r--r--libavformat/avio.h8
2 files changed, 12 insertions, 2 deletions
diff --git a/libavformat/avio.c b/libavformat/avio.c
index e91bc200db..706ba4a610 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -156,8 +156,10 @@ int url_read_complete(URLContext *h, unsigned char *buf, int size)
len = 0;
while (len < size) {
ret = url_read(h, buf+len, size-len);
- if (ret < 1)
- return ret;
+ if (ret == AVERROR(EAGAIN)) {
+ ret = 0;
+ } else if (ret < 1)
+ return ret < 0 ? ret : len;
len += ret;
}
return len;
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 5aa24ca0a7..39c1ce5178 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -69,6 +69,14 @@ 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_read(URLContext *h, unsigned char *buf, int size);
+/**
+ * Read as many bytes as possible (up to size), calling the
+ * read function multiple times if necessary.
+ * Will also retry if the read function returns AVERROR(EAGAIN).
+ * This makes special short-read handling in applications
+ * unnecessary, if the return value is < size then it is
+ * certain there was either an error or the end of file was reached.
+ */
int url_read_complete(URLContext *h, unsigned char *buf, int size);
int url_write(URLContext *h, unsigned char *buf, int size);
int64_t url_seek(URLContext *h, int64_t pos, int whence);