cache.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/tree.h"
#include "avformat.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <stdlib.h>
#include "os_support.h"
#include "url.h"

Go to the source code of this file.

Data Structures
struct	CacheEntry
	support keeping files support filling with a background thread More...
struct	Context

Macros
#define	OFFSET(x)   offsetof(Context, x)
#define	D   AV_OPT_FLAG_DECODING_PARAM

Functions
static int	cmp (const void *key, const void *node)
static int	cache_open (URLContext *h, const char *arg, int flags, AVDictionary **options)
static int	add_entry (URLContext *h, const unsigned char *buf, int size)
static int	cache_read (URLContext *h, unsigned char *buf, int size)
static int64_t	cache_seek (URLContext *h, int64_t pos, int whence)
static int	enu_free (void *opaque, void *elem)
static int	cache_close (URLContext *h)

Variables
static const AVOption	options []
static const AVClass	cache_context_class
const URLProtocol	ff_cache_protocol

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(Context, x)

Definition at line 307 of file cache.c.

D

#define D   AV_OPT_FLAG_DECODING_PARAM

Definition at line 308 of file cache.c.

Function Documentation

cmp()

static int cmp ( const void *  key, const void *  node  )

static

Definition at line 68 of file cache.c.

Referenced by add_entry(), and cache_read().

cache_open()

static int cache_open ( URLContext *  h, const char *  arg, int  flags, AVDictionary **  options  )

static

Definition at line 73 of file cache.c.

add_entry()

static int add_entry ( URLContext *  h, const unsigned char *  buf, int  size  )

static

Definition at line 93 of file cache.c.

Referenced by cache_read().

cache_read()

static int cache_read ( URLContext *  h, unsigned char *  buf, int  size  )

static

Definition at line 156 of file cache.c.

Referenced by cache_seek().

cache_seek()

static int64_t cache_seek ( URLContext *  h, int64_t  pos, int  whence  )

static

Definition at line 221 of file cache.c.

enu_free()

static int enu_free ( void *  opaque, void *  elem  )

static

Definition at line 286 of file cache.c.

Referenced by cache_close().

cache_close()

static int cache_close ( URLContext *  h )

static

Definition at line 292 of file cache.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "read_ahead_limit", "Amount in bytes that may be read ahead when seeking isn't supported, -1 for unlimited", OFFSET(read_ahead_limit), AV_OPT_TYPE_INT, { .i64 = 65536 }, -1, INT_MAX, D },
    {NULL},
}

Definition at line 310 of file cache.c.

cache_context_class

const AVClass cache_context_class

static

Initial value:

= {
    .class_name = "Cache",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 315 of file cache.c.

ff_cache_protocol

const URLProtocol ff_cache_protocol

Initial value:

= {
    .name                = "cache",
    .url_open2           = cache_open,
    .url_read            = cache_read,
    .url_seek            = cache_seek,
    .url_close           = cache_close,
    .priv_data_size      = sizeof(Context),
    .priv_data_class     = &cache_context_class,
}

Definition at line 322 of file cache.c.