-/* unbuffered I/O */
-
-/**
- * URL Context.
- * New fields can be added to the end with minor version bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump.
- * sizeof(URLContext) must not be used outside libav*.
- */
-typedef struct URLContext {
-#if FF_API_URL_CLASS
- const AVClass *av_class; ///< information for av_log(). Set by url_open().
-#endif
- struct URLProtocol *prot;
- int flags;
- int is_streamed; /**< true if streamed (no seek possible), default = false */
- int max_packet_size; /**< if non zero, the stream is packetized with this max packet size */
- void *priv_data;
- char *filename; /**< specified URL */
- int is_connected;
-} URLContext;
-
-#if FF_API_OLD_AVIO
-typedef struct URLPollEntry {
- URLContext *handle;
- int events;
- int revents;
-} URLPollEntry;
-#endif
-
-/**
- * @defgroup open_modes URL open modes
- * The flags argument to url_open and cosins must be one of the following
- * constants, optionally ORed with other flags.
- * @{
- */
-#define URL_RDONLY 0 /**< read-only */
-#define URL_WRONLY 1 /**< write-only */
-#define URL_RDWR 2 /**< read-write */
-/**
- * @}
- */
-
-/**
- * Use non-blocking mode.
- * If this flag is set, operations on the context will return
- * AVERROR(EAGAIN) if they can not be performed immediately.
- * If this flag is not set, operations on the context will never return
- * AVERROR(EAGAIN).
- * Note that this flag does not affect the opening/connecting of the
- * context. Connecting a protocol will always block if necessary (e.g. on
- * network protocols) but never hang (e.g. on busy devices).
- * Warning: non-blocking protocols is work-in-progress; this flag may be
- * silently ignored.
- */
-#define URL_FLAG_NONBLOCK 4
-
-typedef int URLInterruptCB(void);
-
-#if FF_API_OLD_AVIO
-/**
- * @defgroup old_url_funcs Old url_* functions
- * @deprecated use the buffered API based on AVIOContext instead
- * @{
- */
-attribute_deprecated int url_open_protocol (URLContext **puc, struct URLProtocol *up,
- const char *url, int flags);
-attribute_deprecated int url_alloc(URLContext **h, const char *url, int flags);
-attribute_deprecated int url_connect(URLContext *h);
-attribute_deprecated int url_open(URLContext **h, const char *url, int flags);
-attribute_deprecated int url_read(URLContext *h, unsigned char *buf, int size);
-attribute_deprecated int url_read_complete(URLContext *h, unsigned char *buf, int size);
-#endif
-
-/**
- * Write size bytes from buf to the resource accessed by h.
- *
- * @return the number of bytes actually written, or a negative value
- * corresponding to an AVERROR code in case of failure
- */
-int url_write(URLContext *h, const unsigned char *buf, int size);
-
-/**
- * Passing this as the "whence" parameter to a seek function causes it to
- * return the filesize without seeking anywhere. Supporting this is optional.
- * If it is not supported then the seek function will return <0.
- */
-#define AVSEEK_SIZE 0x10000
-
-/**
- * Change the position that will be used by the next read/write
- * operation on the resource accessed by h.
- *
- * @param pos specifies the new position to set
- * @param whence specifies how pos should be interpreted, it must be
- * one of SEEK_SET (seek from the beginning), SEEK_CUR (seek from the
- * current position), SEEK_END (seek from the end), or AVSEEK_SIZE
- * (return the filesize of the requested resource, pos is ignored).
- * @return a negative value corresponding to an AVERROR code in case
- * of failure, or the resulting file position, measured in bytes from
- * the beginning of the file. You can use this feature together with
- * SEEK_CUR to read the current file position.
- */
-int64_t url_seek(URLContext *h, int64_t pos, int whence);
-
-/**
- * Close the resource accessed by the URLContext h, and free the
- * memory used by it.
- *
- * @return a negative value if an error condition occurred, 0
- * otherwise
- */
-int url_close(URLContext *h);
-
-/**
- * Return a non-zero value if the resource indicated by url
- * exists, 0 otherwise.
- */
-int url_exist(const char *url);
-
-/**
- * Return the filesize of the resource accessed by h, AVERROR(ENOSYS)
- * if the operation is not supported by h, or another negative value
- * corresponding to an AVERROR error code in case of failure.
- */
-int64_t url_filesize(URLContext *h);
-
-/**
- * Return the file descriptor associated with this URL. For RTP, this
- * will return only the RTP file descriptor, not the RTCP file descriptor.
- *
- * @return the file descriptor associated with this URL, or <0 on error.
- */
-int url_get_file_handle(URLContext *h);
-
-/**
- * Return the maximum packet size associated to packetized file
- * handle. If the file is not packetized (stream like HTTP or file on
- * disk), then 0 is returned.
- *
- * @param h file handle
- * @return maximum packet size in bytes
- */
-int url_get_max_packet_size(URLContext *h);
-
-/**
- * Copy the filename of the resource accessed by h to buf.
- *
- * @param buf_size size in bytes of buf
- */
-void url_get_filename(URLContext *h, char *buf, int buf_size);
-
-/**
- * The callback is called in blocking functions to test regulary if
- * asynchronous interruption is needed. AVERROR_EXIT is returned
- * in this case by the interrupted function. 'NULL' means no interrupt
- * callback is given.
- */
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
-
-#if FF_API_OLD_AVIO
-/* not implemented */
-attribute_deprecated int url_poll(URLPollEntry *poll_table, int n, int timeout);
-#endif
-
-/**
- * Pause and resume playing - only meaningful if using a network streaming
- * protocol (e.g. MMS).
- * @param pause 1 for pause, 0 for resume
- */
-int av_url_read_pause(URLContext *h, int pause);
-
-/**
- * Seek to a given timestamp relative to some component stream.
- * Only meaningful if using a network streaming protocol (e.g. MMS.).
- * @param stream_index The stream index that the timestamp is relative to.
- * If stream_index is (-1) the timestamp should be in AV_TIME_BASE
- * units from the beginning of the presentation.
- * If a stream_index >= 0 is used and the protocol does not support
- * seeking based on component streams, the call will fail with ENOTSUP.
- * @param timestamp timestamp in AVStream.time_base units
- * or if there is no stream specified then in AV_TIME_BASE units.
- * @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
- * and AVSEEK_FLAG_ANY. The protocol may silently ignore
- * AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will
- * fail with ENOTSUP if used and not supported.
- * @return >= 0 on success
- * @see AVInputFormat::read_seek
- */
-int64_t av_url_read_seek(URLContext *h, int stream_index,
- int64_t timestamp, int flags);
-
-/**
- * Oring this flag as into the "whence" parameter to a seek function causes it to
- * seek by any means (like reopening and linear reading) or other normally unreasonble
- * means that can be extreemly slow.
- * This may be ignored by the seek code.
- */
-#define AVSEEK_FORCE 0x20000
-
-#define URL_PROTOCOL_FLAG_NESTED_SCHEME 1 /*< The protocol name can be the first part of a nested protocol scheme */
-
-typedef struct URLProtocol {
- const char *name;
- int (*url_open)(URLContext *h, const char *url, int flags);
- int (*url_read)(URLContext *h, unsigned char *buf, int size);
- int (*url_write)(URLContext *h, const unsigned char *buf, int size);
- int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
- int (*url_close)(URLContext *h);
- struct URLProtocol *next;
- int (*url_read_pause)(URLContext *h, int pause);
- int64_t (*url_read_seek)(URLContext *h, int stream_index,
- int64_t timestamp, int flags);
- int (*url_get_file_handle)(URLContext *h);
- int priv_data_size;
- const AVClass *priv_data_class;
- int flags;
-} URLProtocol;
-
-#if FF_API_REGISTER_PROTOCOL
-extern URLProtocol *first_protocol;
-#endif
-
-extern URLInterruptCB *url_interrupt_cb;
-
-/**
- * If protocol is NULL, returns the first registered protocol,
- * if protocol is non-NULL, returns the next registered protocol after protocol,
- * or NULL if protocol is the last one.
- */
-URLProtocol *av_protocol_next(URLProtocol *p);
-
-#if FF_API_REGISTER_PROTOCOL
-/**
- * @deprecated Use av_register_protocol() instead.
- */
-attribute_deprecated int register_protocol(URLProtocol *protocol);
-
-/**
- * @deprecated Use av_register_protocol2() instead.
- */
-attribute_deprecated int av_register_protocol(URLProtocol *protocol);
-#endif
-
-/**
- * Register the URLProtocol protocol.
- *
- * @param size the size of the URLProtocol struct referenced
- */
-int av_register_protocol2(URLProtocol *protocol, int size);