summaryrefslogtreecommitdiff
path: root/libavformat/file.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavformat/file.c')
-rw-r--r--libavformat/file.c217
1 files changed, 207 insertions, 10 deletions
diff --git a/libavformat/file.c b/libavformat/file.c
index 8683c1bedd..264542a36a 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -2,20 +2,20 @@
* buffered file I/O
* Copyright (c) 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -23,6 +23,9 @@
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avformat.h"
+#if HAVE_DIRENT_H
+#include <dirent.h>
+#endif
#include <fcntl.h>
#if HAVE_IO_H
#include <io.h>
@@ -35,6 +38,32 @@
#include "os_support.h"
#include "url.h"
+/* Some systems may not have S_ISFIFO */
+#ifndef S_ISFIFO
+# ifdef S_IFIFO
+# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
+# else
+# define S_ISFIFO(m) 0
+# endif
+#endif
+
+/* Not available in POSIX.1-1996 */
+#ifndef S_ISLNK
+# ifdef S_IFLNK
+# define S_ISLNK(m) (((m) & S_IFLNK) == S_IFLNK)
+# else
+# define S_ISLNK(m) 0
+# endif
+#endif
+
+/* Not available in POSIX.1-1996 */
+#ifndef S_ISSOCK
+# ifdef S_IFSOCK
+# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
+# else
+# define S_ISSOCK(m) 0
+# endif
+#endif
/* standard file protocol */
@@ -42,15 +71,25 @@ typedef struct FileContext {
const AVClass *class;
int fd;
int trunc;
+ int blocksize;
int follow;
+#if HAVE_DIRENT_H
+ DIR *dir;
+#endif
} 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 },
+ { "truncate", "truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+ { "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, 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 AVOption pipe_options[] = {
+ { "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL }
+};
+
static const AVClass file_class = {
.class_name = "file",
.item_name = av_default_item_name,
@@ -58,10 +97,19 @@ static const AVClass file_class = {
.version = LIBAVUTIL_VERSION_INT,
};
+static const AVClass pipe_class = {
+ .class_name = "pipe",
+ .item_name = av_default_item_name,
+ .option = pipe_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);
+ int ret;
+ size = FFMIN(size, c->blocksize);
+ ret = read(c->fd, buf, size);
if (ret == 0 && c->follow)
return AVERROR(EAGAIN);
return (ret == -1) ? AVERROR(errno) : ret;
@@ -70,7 +118,9 @@ static int file_read(URLContext *h, unsigned char *buf, int size)
static int file_write(URLContext *h, const unsigned char *buf, int size)
{
FileContext *c = h->priv_data;
- int ret = write(c->fd, buf, size);
+ int ret;
+ size = FFMIN(size, c->blocksize);
+ ret = write(c->fd, buf, size);
return (ret == -1) ? AVERROR(errno) : ret;
}
@@ -82,15 +132,67 @@ static int file_get_handle(URLContext *h)
static int file_check(URLContext *h, int mask)
{
+ int ret = 0;
+ const char *filename = h->filename;
+ av_strstart(filename, "file:", &filename);
+
+ {
+#if HAVE_ACCESS && defined(R_OK)
+ if (access(filename, F_OK) < 0)
+ return AVERROR(errno);
+ if (mask&AVIO_FLAG_READ)
+ if (access(filename, R_OK) >= 0)
+ ret |= AVIO_FLAG_READ;
+ if (mask&AVIO_FLAG_WRITE)
+ if (access(filename, W_OK) >= 0)
+ ret |= AVIO_FLAG_WRITE;
+#else
struct stat st;
- int ret = stat(h->filename, &st);
+# ifndef _WIN32
+ ret = stat(filename, &st);
+# else
+ ret = win32_stat(filename, &st);
+# endif
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;
+#endif
+ }
+ return ret;
+}
+
+static int file_delete(URLContext *h)
+{
+#if HAVE_UNISTD_H
+ int ret;
+ const char *filename = h->filename;
+ av_strstart(filename, "file:", &filename);
+
+ ret = rmdir(filename);
+ if (ret < 0 && errno == ENOTDIR)
+ ret = unlink(filename);
+ if (ret < 0)
+ return AVERROR(errno);
return ret;
+#else
+ return AVERROR(ENOSYS);
+#endif /* HAVE_UNISTD_H */
+}
+
+static int file_move(URLContext *h_src, URLContext *h_dst)
+{
+ const char *filename_src = h_src->filename;
+ const char *filename_dst = h_dst->filename;
+ av_strstart(filename_src, "file:", &filename_src);
+ av_strstart(filename_dst, "file:", &filename_dst);
+
+ if (rename(filename_src, filename_dst) < 0)
+ return AVERROR(errno);
+
+ return 0;
}
#if CONFIG_FILE_PROTOCOL
@@ -100,6 +202,7 @@ static int file_open(URLContext *h, const char *filename, int flags)
FileContext *c = h->priv_data;
int access;
int fd;
+ struct stat st;
av_strstart(filename, "file:", &filename);
@@ -121,6 +224,9 @@ static int file_open(URLContext *h, const char *filename, int flags)
if (fd == -1)
return AVERROR(errno);
c->fd = fd;
+
+ h->is_streamed = !fstat(fd, &st) && S_ISFIFO(st.st_mode);
+
return 0;
}
@@ -132,9 +238,8 @@ static int64_t file_seek(URLContext *h, int64_t pos, int whence)
if (whence == AVSEEK_SIZE) {
struct stat st;
-
ret = fstat(c->fd, &st);
- return ret < 0 ? AVERROR(errno) : st.st_size;
+ return ret < 0 ? AVERROR(errno) : (S_ISFIFO(st.st_mode) ? 0 : st.st_size);
}
ret = lseek(c->fd, pos, whence);
@@ -148,6 +253,90 @@ static int file_close(URLContext *h)
return close(c->fd);
}
+static int file_open_dir(URLContext *h)
+{
+#if HAVE_LSTAT
+ FileContext *c = h->priv_data;
+
+ c->dir = opendir(h->filename);
+ if (!c->dir)
+ return AVERROR(errno);
+
+ return 0;
+#else
+ return AVERROR(ENOSYS);
+#endif /* HAVE_LSTAT */
+}
+
+static int file_read_dir(URLContext *h, AVIODirEntry **next)
+{
+#if HAVE_LSTAT
+ FileContext *c = h->priv_data;
+ struct dirent *dir;
+ char *fullpath = NULL;
+
+ *next = ff_alloc_dir_entry();
+ if (!*next)
+ return AVERROR(ENOMEM);
+ do {
+ errno = 0;
+ dir = readdir(c->dir);
+ if (!dir) {
+ av_freep(next);
+ return AVERROR(errno);
+ }
+ } while (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."));
+
+ fullpath = av_append_path_component(h->filename, dir->d_name);
+ if (fullpath) {
+ struct stat st;
+ if (!lstat(fullpath, &st)) {
+ if (S_ISDIR(st.st_mode))
+ (*next)->type = AVIO_ENTRY_DIRECTORY;
+ else if (S_ISFIFO(st.st_mode))
+ (*next)->type = AVIO_ENTRY_NAMED_PIPE;
+ else if (S_ISCHR(st.st_mode))
+ (*next)->type = AVIO_ENTRY_CHARACTER_DEVICE;
+ else if (S_ISBLK(st.st_mode))
+ (*next)->type = AVIO_ENTRY_BLOCK_DEVICE;
+ else if (S_ISLNK(st.st_mode))
+ (*next)->type = AVIO_ENTRY_SYMBOLIC_LINK;
+ else if (S_ISSOCK(st.st_mode))
+ (*next)->type = AVIO_ENTRY_SOCKET;
+ else if (S_ISREG(st.st_mode))
+ (*next)->type = AVIO_ENTRY_FILE;
+ else
+ (*next)->type = AVIO_ENTRY_UNKNOWN;
+
+ (*next)->group_id = st.st_gid;
+ (*next)->user_id = st.st_uid;
+ (*next)->size = st.st_size;
+ (*next)->filemode = st.st_mode & 0777;
+ (*next)->modification_timestamp = INT64_C(1000000) * st.st_mtime;
+ (*next)->access_timestamp = INT64_C(1000000) * st.st_atime;
+ (*next)->status_change_timestamp = INT64_C(1000000) * st.st_ctime;
+ }
+ av_free(fullpath);
+ }
+
+ (*next)->name = av_strdup(dir->d_name);
+ return 0;
+#else
+ return AVERROR(ENOSYS);
+#endif /* HAVE_LSTAT */
+}
+
+static int file_close_dir(URLContext *h)
+{
+#if HAVE_LSTAT
+ FileContext *c = h->priv_data;
+ closedir(c->dir);
+ return 0;
+#else
+ return AVERROR(ENOSYS);
+#endif /* HAVE_LSTAT */
+}
+
const URLProtocol ff_file_protocol = {
.name = "file",
.url_open = file_open,
@@ -157,8 +346,14 @@ const URLProtocol ff_file_protocol = {
.url_close = file_close,
.url_get_file_handle = file_get_handle,
.url_check = file_check,
+ .url_delete = file_delete,
+ .url_move = file_move,
.priv_data_size = sizeof(FileContext),
.priv_data_class = &file_class,
+ .url_open_dir = file_open_dir,
+ .url_read_dir = file_read_dir,
+ .url_close_dir = file_close_dir,
+ .default_whitelist = "file,crypto"
};
#endif /* CONFIG_FILE_PROTOCOL */
@@ -196,6 +391,8 @@ const URLProtocol ff_pipe_protocol = {
.url_get_file_handle = file_get_handle,
.url_check = file_check,
.priv_data_size = sizeof(FileContext),
+ .priv_data_class = &pipe_class,
+ .default_whitelist = "crypto"
};
#endif /* CONFIG_PIPE_PROTOCOL */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 12:51:18 +0000