/*
- * Buffered file io for ffmpeg system
+ * buffered file I/O
* Copyright (c) 2001 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
#include "avformat.h"
#include <fcntl.h>
-#if HAVE_SETMODE
+#if HAVE_IO_H
#include <io.h>
#endif
+#if HAVE_UNISTD_H
#include <unistd.h>
-#include <sys/time.h>
+#endif
+#include <sys/stat.h>
#include <stdlib.h>
#include "os_support.h"
+#include "url.h"
/* standard file protocol */
+typedef struct FileContext {
+ const AVClass *class;
+ int fd;
+ int trunc;
+ int follow;
+} 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 },
+ { "follow", "Follow a file as it is being written", offsetof(FileContext, follow), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_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;
+ int ret = read(c->fd, buf, size);
+ if (ret == 0 && c->follow)
+ return AVERROR(EAGAIN);
+ return (ret == -1) ? AVERROR(errno) : ret;
+}
+
+static int file_write(URLContext *h, const unsigned char *buf, int size)
+{
+ FileContext *c = h->priv_data;
+ int ret = write(c->fd, buf, size);
+ return (ret == -1) ? AVERROR(errno) : ret;
+}
+
+static int file_get_handle(URLContext *h)
+{
+ FileContext *c = h->priv_data;
+ return c->fd;
+}
+
+static int file_check(URLContext *h, int mask)
+{
+ const char *filename = h->filename;
+ struct stat st;
+ int ret;
+
+ av_strstart(filename, "file:", &filename);
+
+ ret = stat(filename, &st);
+ if (ret < 0)
+ return AVERROR(errno);
+
+ ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ : 0;
+ ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
+
+ return ret;
+}
+
+#if CONFIG_FILE_PROTOCOL
+
static int file_open(URLContext *h, const char *filename, int flags)
{
+ FileContext *c = h->priv_data;
int access;
int fd;
av_strstart(filename, "file:", &filename);
- if (flags & URL_RDWR) {
- access = O_CREAT | O_TRUNC | O_RDWR;
- } else if (flags & URL_WRONLY) {
- access = O_CREAT | O_TRUNC | O_WRONLY;
+ if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
+ access = O_CREAT | O_RDWR;
+ if (c->trunc)
+ access |= O_TRUNC;
+ } else if (flags & AVIO_FLAG_WRITE) {
+ access = O_CREAT | O_WRONLY;
+ if (c->trunc)
+ access |= O_TRUNC;
} else {
access = O_RDONLY;
}
#ifdef O_BINARY
access |= O_BINARY;
#endif
- fd = open(filename, access, 0666);
- if (fd < 0)
- return AVERROR(ENOENT);
- h->priv_data = (void *)(size_t)fd;
+ fd = avpriv_open(filename, access, 0666);
+ if (fd == -1)
+ return AVERROR(errno);
+ c->fd = fd;
return 0;
}
-static int file_read(URLContext *h, unsigned char *buf, int size)
-{
- int fd = (size_t)h->priv_data;
- return read(fd, buf, size);
-}
-
-static int file_write(URLContext *h, unsigned char *buf, int size)
-{
- int fd = (size_t)h->priv_data;
- return write(fd, buf, size);
-}
-
/* XXX: use llseek */
static int64_t file_seek(URLContext *h, int64_t pos, int whence)
{
- int fd = (size_t)h->priv_data;
- return lseek(fd, pos, whence);
+ FileContext *c = h->priv_data;
+ int64_t ret;
+
+ if (whence == AVSEEK_SIZE) {
+ struct stat st;
+
+ ret = fstat(c->fd, &st);
+ return ret < 0 ? AVERROR(errno) : st.st_size;
+ }
+
+ ret = lseek(c->fd, pos, whence);
+
+ return ret < 0 ? AVERROR(errno) : ret;
}
static int file_close(URLContext *h)
{
- int fd = (size_t)h->priv_data;
- return close(fd);
+ FileContext *c = h->priv_data;
+ return close(c->fd);
}
-URLProtocol file_protocol = {
- "file",
- file_open,
- file_read,
- file_write,
- file_seek,
- file_close,
+const URLProtocol ff_file_protocol = {
+ .name = "file",
+ .url_open = file_open,
+ .url_read = file_read,
+ .url_write = file_write,
+ .url_seek = file_seek,
+ .url_close = file_close,
+ .url_get_file_handle = file_get_handle,
+ .url_check = file_check,
+ .priv_data_size = sizeof(FileContext),
+ .priv_data_class = &file_class,
};
-/* pipe protocol */
+#endif /* CONFIG_FILE_PROTOCOL */
+
+#if CONFIG_PIPE_PROTOCOL
static int pipe_open(URLContext *h, const char *filename, int flags)
{
+ FileContext *c = h->priv_data;
int fd;
char *final;
av_strstart(filename, "pipe:", &filename);
fd = strtol(filename, &final, 10);
if((filename == final) || *final ) {/* No digits found, or something like 10ab */
- if (flags & URL_WRONLY) {
+ if (flags & AVIO_FLAG_WRITE) {
fd = 1;
} else {
fd = 0;
#if HAVE_SETMODE
setmode(fd, O_BINARY);
#endif
- h->priv_data = (void *)(size_t)fd;
+ c->fd = fd;
h->is_streamed = 1;
return 0;
}
-URLProtocol pipe_protocol = {
- "pipe",
- pipe_open,
- file_read,
- file_write,
+const URLProtocol ff_pipe_protocol = {
+ .name = "pipe",
+ .url_open = pipe_open,
+ .url_read = file_read,
+ .url_write = file_write,
+ .url_get_file_handle = file_get_handle,
+ .url_check = file_check,
+ .priv_data_size = sizeof(FileContext),
};
+
+#endif /* CONFIG_PIPE_PROTOCOL */
projects / ffmpeg / blobdiff