*/
#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
#include "avformat.h"
#include <fcntl.h>
#if HAVE_IO_H
/* standard file protocol */
typedef struct FileContext {
+ const AVClass *class;
int fd;
+ int trunc;
} FileContext;
+static const AVOption file_options[] = {
+ { "truncate", "Truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL }
+};
+
+static const AVClass file_class = {
+ .class_name = "file",
+ .item_name = av_default_item_name,
+ .option = file_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
static int file_read(URLContext *h, unsigned char *buf, int size)
{
FileContext *c = h->priv_data;
av_strstart(filename, "file:", &filename);
if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
- access = O_CREAT | O_TRUNC | O_RDWR;
+ access = O_CREAT | O_RDWR;
+ if (c->trunc)
+ access |= O_TRUNC;
} else if (flags & AVIO_FLAG_WRITE) {
- access = O_CREAT | O_TRUNC | O_WRONLY;
+ access = O_CREAT | O_WRONLY;
+ if (c->trunc)
+ access |= O_TRUNC;
} else {
access = O_RDONLY;
}
.url_get_file_handle = file_get_handle,
.url_check = file_check,
.priv_data_size = sizeof(FileContext),
+ .priv_data_class = &file_class,
};
#endif /* CONFIG_FILE_PROTOCOL */