# include <config.h>
#endif
-#include <vlc/vlc.h>
+#include <vlc_common.h>
+#include <vlc_plugin.h>
#include <vlc_access.h>
#include <vlc_input.h>
-#include <vlc_charset.h>
-#include <vlc_interface.h>
+#include <vlc_fs.h>
+#include <vlc_dialog.h>
#include <assert.h>
-#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#define FILE_MMAP_LONGTEXT N_( \
"Try to use memory mapping to read files and block devices." )
+#ifndef NDEBUG
+/*# define MMAP_DEBUG 1*/
+#endif
+
static int Open (vlc_object_t *);
static void Close (vlc_object_t *);
-vlc_module_begin();
- set_shortname (_("MMap"));
- set_description (_("Memory-mapped file input"));
- set_category (CAT_INPUT);
- set_subcategory (SUBCAT_INPUT_ACCESS);
- set_capability ("access2", 52);
- add_shortcut ("file");
- set_callbacks (Open, Close);
-
- add_bool ("file-mmap", VLC_TRUE, NULL,
- FILE_MMAP_TEXT, FILE_MMAP_LONGTEXT, VLC_TRUE);
-vlc_module_end();
+vlc_module_begin ()
+ set_shortname (N_("MMap"))
+ set_description (N_("Memory-mapped file input"))
+ set_category (CAT_INPUT)
+ set_subcategory (SUBCAT_INPUT_ACCESS)
+ set_capability ("access", 52)
+ add_shortcut ("file")
+ set_callbacks (Open, Close)
+#ifdef __APPLE__
+ add_bool ("file-mmap", true, NULL,
+ FILE_MMAP_TEXT, FILE_MMAP_LONGTEXT, true)
+#else
+ add_bool ("file-mmap", false, NULL,
+ FILE_MMAP_TEXT, FILE_MMAP_LONGTEXT, true)
+#endif
+vlc_module_end ()
static block_t *Block (access_t *);
-static int Seek (access_t *, int64_t);
+static int Seek (access_t *, uint64_t);
static int Control (access_t *, int, va_list);
struct access_sys_t
{
access_t *p_access = (access_t *)p_this;
access_sys_t *p_sys;
- const char *path = p_access->psz_path;
+ const char *path = p_access->psz_filepath;
int fd;
- if (!var_CreateGetBool (p_this, "file-mmap"))
+ assert ((INT64_C(1) << 63) == ((off_t)(INT64_C(1) << 63)));
+
+ if (!var_InheritBool (p_this, "file-mmap"))
return VLC_EGENERIC; /* disabled */
STANDARD_BLOCK_ACCESS_INIT;
- if (!strcmp (p_access->psz_path, "-"))
- fd = dup (0);
- else
- {
- msg_Dbg (p_access, "opening file %s", path);
- fd = utf8_open (path, O_RDONLY | O_NOCTTY, 0666);
- }
+ msg_Dbg (p_access, "opening file %s", path);
+ fd = vlc_open (path, O_RDONLY | O_NOCTTY);
if (fd == -1)
{
if (!S_ISREG (st.st_mode) && !S_ISBLK (st.st_mode))
{
- msg_Dbg (p_access, "skipping non regular file %s", path);
+ msg_Dbg (p_access, "skipping non-regular file %s", path);
goto error;
}
+#if defined(HAVE_FCNTL_H)
+ /* We'd rather use any available memory for reading ahead
+ * than for caching what we've already mmap'ed */
+# if defined(F_RDAHEAD)
+ fcntl (fd, F_RDAHEAD, 1);
+# endif
+# if defined(F_NOCACHE)
+ fcntl (fd, F_NOCACHE, 1);
+# endif
+#endif
+
/* Autodetect mmap() support */
if (st.st_size > 0)
{
p_sys->fd = fd;
p_access->info.i_size = st.st_size;
+#ifdef HAVE_POSIX_FADVISE
posix_fadvise (fd, 0, 0, POSIX_FADV_SEQUENTIAL);
+#endif
return VLC_SUCCESS;
static block_t *Block (access_t *p_access)
{
access_sys_t *p_sys = p_access->p_sys;
-#ifndef NDEBUG
- int64_t dbgpos = lseek (p_sys->fd, 0, SEEK_CUR);
- if (dbgpos != p_access->info.i_pos)
- msg_Err (p_access, "position: 0x%08llx instead of 0x%08llx",
- p_access->info.i_pos, dbgpos);
-#endif
- if ((uint64_t)p_access->info.i_pos >= (uint64_t)p_access->info.i_size)
- {
- /* End of file - check if file size changed... */
- struct stat st;
+ /* Check if file size changed... */
+ struct stat st;
- if ((fstat (p_sys->fd, &st) == 0)
- && (st.st_size != p_access->info.i_size))
- {
- p_access->info.i_size = st.st_size;
- p_access->info.i_update |= INPUT_UPDATE_SIZE;
- }
+ if ((fstat (p_sys->fd, &st) == 0)
+ && (st.st_size != p_access->info.i_size))
+ {
+ p_access->info.i_size = st.st_size;
+ p_access->info.i_update |= INPUT_UPDATE_SIZE;
+ }
- /* Really at end of file then */
- if ((uint64_t)p_access->info.i_pos >= (uint64_t)p_access->info.i_size)
- {
- p_access->info.b_eof = VLC_TRUE;
- msg_Dbg (p_access, "at end of memory mapped file");
- return NULL;
- }
+ if (p_access->info.i_pos >= p_access->info.i_size)
+ {
+ /* We are at end of file */
+ p_access->info.b_eof = true;
+ msg_Dbg (p_access, "at end of memory mapped file");
+ return NULL;
}
+#ifdef MMAP_DEBUG
+ uint64_t dbgpos = lseek (p_sys->fd, 0, SEEK_CUR);
+ if (dbgpos != p_access->info.i_pos)
+ msg_Err (p_access, "position: 0x%016"PRIx64" instead of 0x%016"PRIx64,
+ p_access->info.i_pos, dbgpos);
+#endif
+
const uintptr_t page_mask = p_sys->page_size - 1;
/* Start the mapping on a page boundary: */
- off_t outer_offset = p_access->info.i_pos & ~page_mask;
+ off_t outer_offset = p_access->info.i_pos & ~(off_t)page_mask;
/* Skip useless bytes at the beginning of the first page: */
size_t inner_offset = p_access->info.i_pos & page_mask;
/* Map no more bytes than remain: */
/* NOTE: We use PROT_WRITE and MAP_PRIVATE so that the block can be
* modified down the chain, without messing up with the underlying
* original file. This does NOT need open write permission. */
- void *addr = mmap (NULL, length, PROT_READ|PROT_WRITE, MAP_PRIVATE,
- p_sys->fd, outer_offset);
+ void *addr = mmap (NULL, length, PROT_READ|PROT_WRITE, MAP_PRIVATE
+#ifdef MAP_NO_CACHE
+ | MAP_NOCACHE
+#endif
+ , p_sys->fd, outer_offset);
if (addr == MAP_FAILED)
{
msg_Err (p_access, "memory mapping failed (%m)");
- intf_UserFatal (p_access, VLC_FALSE, _("File reading failed"),
+ dialog_Fatal (p_access, _("File reading failed"), "%s",
_("VLC could not read the file."));
- msleep (INPUT_ERROR_SLEEP);
- return NULL;
+ goto fatal;
}
+#ifdef HAVE_POSIX_MADVISE
posix_madvise (addr, length, POSIX_MADV_SEQUENTIAL);
+#endif
block_t *block = block_mmap_Alloc (addr, length);
if (block == NULL)
- return NULL;
+ goto fatal;
block->p_buffer += inner_offset;
block->i_buffer -= inner_offset;
-#ifndef NDEBUG
- msg_Dbg (p_access, "mapped 0x%lx bytes at %p from offset 0x%lx",
- (unsigned long)length, addr, (unsigned long)outer_offset);
+#ifdef MMAP_DEBUG
+ msg_Dbg (p_access, "mapped 0x%zx bytes at %p from offset 0x%"PRIx64,
+ length, addr, (uint64_t)outer_offset);
/* Compare normal I/O with memory mapping */
char *buf = malloc (block->i_buffer);
ssize_t i_read = read (p_sys->fd, buf, block->i_buffer);
if (i_read != (ssize_t)block->i_buffer)
- msg_Err (p_access, "read %u instead of %u bytes", (unsigned)i_read,
- (unsigned)block->i_buffer);
+ msg_Err (p_access, "read %zd instead of %zu bytes", i_read,
+ block->i_buffer);
if (memcmp (buf, block->p_buffer, block->i_buffer))
msg_Err (p_access, "inconsistent data buffer");
free (buf);
p_access->info.i_pos = outer_offset + length;
return block;
+
+fatal:
+ p_access->info.b_eof = true;
+ return NULL;
}
-static int Seek (access_t *p_access, int64_t i_pos)
+static int Seek (access_t *p_access, uint64_t i_pos)
{
+#ifdef MMAP_DEBUG
+ lseek (p_access->p_sys->fd, i_pos, SEEK_SET);
+#endif
+
p_access->info.i_pos = i_pos;
- p_access->info.b_eof = VLC_FALSE;
+ p_access->info.b_eof = false;
return VLC_SUCCESS;
}
static int Control (access_t *p_access, int query, va_list args)
{
- access_sys_t *p_sys = p_access->p_sys;
-
switch (query)
{
case ACCESS_CAN_SEEK:
case ACCESS_CAN_FASTSEEK:
case ACCESS_CAN_PAUSE:
case ACCESS_CAN_CONTROL_PACE:
- *((vlc_bool_t *)va_arg (args, vlc_bool_t *)) = VLC_TRUE;
- return VLC_SUCCESS;
-
- case ACCESS_GET_MTU:
- *((int *)va_arg (args, int *)) = p_sys->mtu;
+ *va_arg(args, bool *) = true;
return VLC_SUCCESS;
case ACCESS_GET_PTS_DELAY:
- *((int64_t *)va_arg (args, int64_t *)) = DEFAULT_PTS_DELAY;
+ {
+ int64_t delay_ms = var_CreateGetInteger (p_access, "file-caching");
+ *va_arg(args, int64_t *) = delay_ms * INT64_C (1000);
return VLC_SUCCESS;
+ }
case ACCESS_GET_TITLE_INFO:
case ACCESS_GET_META:
projects / vlc / blobdiff