/*
- * unbuffered io for ffmpeg system
* 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
*/
#ifndef AVFORMAT_AVIO_H
#define AVFORMAT_AVIO_H
+/**
+ * @file
+ * unbuffered I/O operations
+ *
+ * @warning This file has to be considered an internal but installed
+ * header, so it should not be directly included in your projects.
+ */
+
#include <stdint.h>
+#include "libavutil/common.h"
+#include "libavutil/log.h"
+
+#include "libavformat/version.h"
+
/* unbuffered I/O */
/**
* version bump.
* sizeof(URLContext) must not be used outside libav*.
*/
-struct URLContext {
-#if LIBAVFORMAT_VERSION_MAJOR >= 53
+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 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 filename */
-};
-
-typedef struct URLContext URLContext;
+ char *filename; /**< specified URL */
+ int is_connected;
+} URLContext;
typedef struct URLPollEntry {
URLContext *handle;
int revents;
} URLPollEntry;
-#define URL_RDONLY 0
-#define URL_WRONLY 1
-#define URL_RDWR 2
+/**
+ * @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);
+/**
+ * Create a URLContext for accessing to the resource indicated by
+ * url, and open it using the URLProtocol up.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
int url_open_protocol (URLContext **puc, struct URLProtocol *up,
- const char *filename, int flags);
-int url_open(URLContext **h, const char *filename, int flags);
+ const char *url, int flags);
+
+/**
+ * Create a URLContext for accessing to the resource indicated by
+ * url, but do not initiate the connection yet.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_alloc(URLContext **h, const char *url, int flags);
+
+/**
+ * Connect an URLContext that has been allocated by url_alloc
+ */
+int url_connect(URLContext *h);
+
+/**
+ * Create an URLContext for accessing to the resource indicated by
+ * url, and open it.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_open(URLContext **h, const char *url, int flags);
+
+/**
+ * Read up to size bytes from the resource accessed by h, and store
+ * the read bytes in buf.
+ *
+ * @return The number of bytes actually read, or a negative value
+ * corresponding to an AVERROR code in case of error. A value of zero
+ * indicates that it is not possible to read more from the accessed
+ * resource (except if the value of the size argument is also zero).
+ */
int url_read(URLContext *h, unsigned char *buf, int size);
-int url_write(URLContext *h, unsigned char *buf, int size);
+
+/**
+ * Read as many bytes as possible (up to size), calling the
+ * read function multiple times if necessary.
+ * This makes special short-read handling in applications
+ * unnecessary, if the return value is < size then it is
+ * certain there was either an error or the end of file was reached.
+ */
+int url_read_complete(URLContext *h, unsigned char *buf, int size);
+
+/**
+ * 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);
-int url_exist(const char *filename);
+
+/**
+ * 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
* @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(EINTR) is returned
+ * asynchronous interruption is needed. AVERROR_EXIT is returned
* in this case by the interrupted function. 'NULL' means no interrupt
* callback is given.
*/
int64_t timestamp, int flags);
/**
- * 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.
+ * 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_SIZE 0x10000
+#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 *filename, int flags);
+ 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, 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 LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_REGISTER_PROTOCOL
extern URLProtocol *first_protocol;
#endif
*/
URLProtocol *av_protocol_next(URLProtocol *p);
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#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
-int av_register_protocol(URLProtocol *protocol);
+/**
+ * Register the URLProtocol protocol.
+ *
+ * @param size the size of the URLProtocol struct referenced
+ */
+int av_register_protocol2(URLProtocol *protocol, int size);
/**
* Bytestream IO 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(ByteIOContext) must not be used outside libav*.
+ * sizeof(AVIOContext) must not be used outside libav*.
*/
typedef struct {
unsigned char *buffer;
int (*read_pause)(void *opaque, int pause);
int64_t (*read_seek)(void *opaque, int stream_index,
int64_t timestamp, int flags);
-} ByteIOContext;
+} AVIOContext;
-int init_put_byte(ByteIOContext *s,
+#if FF_API_OLD_AVIO
+typedef attribute_deprecated AVIOContext ByteIOContext;
+
+attribute_deprecated int init_put_byte(AVIOContext *s,
unsigned char *buffer,
int buffer_size,
int write_flag,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
int64_t (*seek)(void *opaque, int64_t offset, int whence));
-ByteIOContext *av_alloc_put_byte(
+attribute_deprecated AVIOContext *av_alloc_put_byte(
unsigned char *buffer,
int buffer_size,
int write_flag,
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
int64_t (*seek)(void *opaque, int64_t offset, int whence));
-void put_byte(ByteIOContext *s, int b);
-void put_buffer(ByteIOContext *s, const unsigned char *buf, int size);
-void put_le64(ByteIOContext *s, uint64_t val);
-void put_be64(ByteIOContext *s, uint64_t val);
-void put_le32(ByteIOContext *s, unsigned int val);
-void put_be32(ByteIOContext *s, unsigned int val);
-void put_le24(ByteIOContext *s, unsigned int val);
-void put_be24(ByteIOContext *s, unsigned int val);
-void put_le16(ByteIOContext *s, unsigned int val);
-void put_be16(ByteIOContext *s, unsigned int val);
-void put_tag(ByteIOContext *s, const char *tag);
+/**
+ * @defgroup old_avio_funcs Old put_/get_*() functions
+ * @deprecated use the avio_ -prefixed functions instead.
+ * @{
+ */
+attribute_deprecated int get_buffer(AVIOContext *s, unsigned char *buf, int size);
+attribute_deprecated int get_partial_buffer(AVIOContext *s, unsigned char *buf, int size);
+attribute_deprecated int get_byte(AVIOContext *s);
+attribute_deprecated unsigned int get_le16(AVIOContext *s);
+attribute_deprecated unsigned int get_le24(AVIOContext *s);
+attribute_deprecated unsigned int get_le32(AVIOContext *s);
+attribute_deprecated uint64_t get_le64(AVIOContext *s);
+attribute_deprecated unsigned int get_be16(AVIOContext *s);
+attribute_deprecated unsigned int get_be24(AVIOContext *s);
+attribute_deprecated unsigned int get_be32(AVIOContext *s);
+attribute_deprecated uint64_t get_be64(AVIOContext *s);
+
+attribute_deprecated void put_byte(AVIOContext *s, int b);
+attribute_deprecated void put_nbyte(AVIOContext *s, int b, int count);
+attribute_deprecated void put_buffer(AVIOContext *s, const unsigned char *buf, int size);
+attribute_deprecated void put_le64(AVIOContext *s, uint64_t val);
+attribute_deprecated void put_be64(AVIOContext *s, uint64_t val);
+attribute_deprecated void put_le32(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_be32(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_le24(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_be24(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_le16(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_be16(AVIOContext *s, unsigned int val);
+attribute_deprecated void put_tag(AVIOContext *s, const char *tag);
+/**
+ * @}
+ */
-void put_strz(ByteIOContext *s, const char *buf);
+attribute_deprecated int av_url_read_fpause(AVIOContext *h, int pause);
+attribute_deprecated int64_t av_url_read_fseek (AVIOContext *h, int stream_index,
+ int64_t timestamp, int flags);
/**
- * fseek() equivalent for ByteIOContext.
- * @return new position or AVERROR.
+ * @defgroup old_url_f_funcs Old url_f* functions
+ * @deprecated use the avio_ -prefixed functions instead.
+ * @{
+ */
+attribute_deprecated int url_fopen( AVIOContext **s, const char *url, int flags);
+attribute_deprecated int url_fclose(AVIOContext *s);
+attribute_deprecated int64_t url_fseek(AVIOContext *s, int64_t offset, int whence);
+attribute_deprecated int url_fskip(AVIOContext *s, int64_t offset);
+attribute_deprecated int64_t url_ftell(AVIOContext *s);
+attribute_deprecated int64_t url_fsize(AVIOContext *s);
+#define URL_EOF (-1)
+attribute_deprecated int url_fgetc(AVIOContext *s);
+attribute_deprecated int url_setbufsize(AVIOContext *s, int buf_size);
+#ifdef __GNUC__
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+#else
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...);
+#endif
+attribute_deprecated void put_flush_packet(AVIOContext *s);
+/**
+ * @}
*/
-int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence);
/**
- * Skip given number of bytes forward.
- * @param offset number of bytes
+ * @deprecated use AVIOContext.eof_reached
*/
-void url_fskip(ByteIOContext *s, int64_t offset);
+attribute_deprecated int url_feof(AVIOContext *s);
+attribute_deprecated int url_ferror(AVIOContext *s);
+
+attribute_deprecated int udp_set_remote_url(URLContext *h, const char *uri);
+attribute_deprecated int udp_get_local_port(URLContext *h);
+
+attribute_deprecated void init_checksum(AVIOContext *s,
+ unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
+ unsigned long checksum);
+attribute_deprecated unsigned long get_checksum(AVIOContext *s);
+#endif
/**
- * ftell() equivalent for ByteIOContext.
- * @return position or AVERROR.
+ * Allocate and initialize an AVIOContext for buffered I/O. It must be later
+ * freed with av_free().
+ *
+ * @param buffer Memory block for input/output operations via AVIOContext.
+ * @param buffer_size The buffer size is very important for performance.
+ * For protocols with fixed blocksize it should be set to this blocksize.
+ * For others a typical size is a cache page, e.g. 4kb.
+ * @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
+ * @param opaque An opaque pointer to user-specific data.
+ * @param read_packet A function for refilling the buffer, may be NULL.
+ * @param write_packet A function for writing the buffer contents, may be NULL.
+ * @param seek A function for seeking to specified byte position, may be NULL.
+ *
+ * @return Allocated AVIOContext or NULL on failure.
*/
-int64_t url_ftell(ByteIOContext *s);
+AVIOContext *avio_alloc_context(
+ unsigned char *buffer,
+ int buffer_size,
+ int write_flag,
+ void *opaque,
+ int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int64_t (*seek)(void *opaque, int64_t offset, int whence));
+
+void avio_w8(AVIOContext *s, int b);
+void avio_write(AVIOContext *s, const unsigned char *buf, int size);
+void avio_wl64(AVIOContext *s, uint64_t val);
+void avio_wb64(AVIOContext *s, uint64_t val);
+void avio_wl32(AVIOContext *s, unsigned int val);
+void avio_wb32(AVIOContext *s, unsigned int val);
+void avio_wl24(AVIOContext *s, unsigned int val);
+void avio_wb24(AVIOContext *s, unsigned int val);
+void avio_wl16(AVIOContext *s, unsigned int val);
+void avio_wb16(AVIOContext *s, unsigned int val);
+
+#if FF_API_OLD_AVIO
+attribute_deprecated void put_strz(AVIOContext *s, const char *buf);
+#endif
/**
- * Gets the filesize.
- * @return filesize or AVERROR
+ * Write a NULL-terminated string.
+ * @return number of bytes written.
*/
-int64_t url_fsize(ByteIOContext *s);
+int avio_put_str(AVIOContext *s, const char *str);
/**
- * feof() equivalent for ByteIOContext.
- * @return non zero if and only if end of file
+ * Convert an UTF-8 string to UTF-16LE and write it.
+ * @return number of bytes written.
*/
-int url_feof(ByteIOContext *s);
+int avio_put_str16le(AVIOContext *s, const char *str);
-int url_ferror(ByteIOContext *s);
+/**
+ * fseek() equivalent for AVIOContext.
+ * @return new position or AVERROR.
+ */
+int64_t avio_seek(AVIOContext *s, int64_t offset, int whence);
-int av_url_read_fpause(ByteIOContext *h, int pause);
-int64_t av_url_read_fseek(ByteIOContext *h, int stream_index,
- int64_t timestamp, int flags);
+/**
+ * Skip given number of bytes forward
+ * @return new position or AVERROR.
+ */
+static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
+{
+ return avio_seek(s, offset, SEEK_CUR);
+}
-#define URL_EOF (-1)
-/** @note return URL_EOF (-1) if EOF */
-int url_fgetc(ByteIOContext *s);
+/**
+ * ftell() equivalent for AVIOContext.
+ * @return position or AVERROR.
+ */
+static av_always_inline int64_t avio_tell(AVIOContext *s)
+{
+ return avio_seek(s, 0, SEEK_CUR);
+}
+
+/**
+ * Get the filesize.
+ * @return filesize or AVERROR
+ */
+int64_t avio_size(AVIOContext *s);
/** @warning currently size is limited */
#ifdef __GNUC__
-int url_fprintf(ByteIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+int avio_printf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
#else
-int url_fprintf(ByteIOContext *s, const char *fmt, ...);
+int avio_printf(AVIOContext *s, const char *fmt, ...);
#endif
+#if FF_API_OLD_AVIO
/** @note unlike fgets, the EOL character is not returned and a whole
line is parsed. return NULL if first char read was EOF */
-char *url_fgets(ByteIOContext *s, char *buf, int buf_size);
-
-void put_flush_packet(ByteIOContext *s);
+attribute_deprecated char *url_fgets(AVIOContext *s, char *buf, int buf_size);
+#endif
+void avio_flush(AVIOContext *s);
-/**
- * Reads size bytes from ByteIOContext into buf.
- * @returns number of bytes read or AVERROR
- */
-int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
/**
- * Reads size bytes from ByteIOContext into buf.
- * This reads at most 1 packet. If that is not enough fewer bytes will be
- * returned.
- * @returns number of bytes read or AVERROR
+ * Read size bytes from AVIOContext into buf.
+ * @return number of bytes read or AVERROR
*/
-int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size);
+int avio_read(AVIOContext *s, unsigned char *buf, int size);
/** @note return 0 if EOF, so you cannot use it if EOF handling is
necessary */
-int get_byte(ByteIOContext *s);
-unsigned int get_le24(ByteIOContext *s);
-unsigned int get_le32(ByteIOContext *s);
-uint64_t get_le64(ByteIOContext *s);
-unsigned int get_le16(ByteIOContext *s);
+int avio_r8 (AVIOContext *s);
+unsigned int avio_rl16(AVIOContext *s);
+unsigned int avio_rl24(AVIOContext *s);
+unsigned int avio_rl32(AVIOContext *s);
+uint64_t avio_rl64(AVIOContext *s);
-char *get_strz(ByteIOContext *s, char *buf, int maxlen);
-unsigned int get_be16(ByteIOContext *s);
-unsigned int get_be24(ByteIOContext *s);
-unsigned int get_be32(ByteIOContext *s);
-uint64_t get_be64(ByteIOContext *s);
+/**
+ * Read a string from pb into buf. The reading will terminate when either
+ * a NULL character was encountered, maxlen bytes have been read, or nothing
+ * more can be read from pb. The result is guaranteed to be NULL-terminated, it
+ * will be truncated if buf is too small.
+ * Note that the string is not interpreted or validated in any way, it
+ * might get truncated in the middle of a sequence for multi-byte encodings.
+ *
+ * @return number of bytes read (is always <= maxlen).
+ * If reading ends on EOF or error, the return value will be one more than
+ * bytes actually read.
+ */
+int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen);
-uint64_t ff_get_v(ByteIOContext *bc);
+/**
+ * Read a UTF-16 string from pb and convert it to UTF-8.
+ * The reading will terminate when either a null or invalid character was
+ * encountered or maxlen bytes have been read.
+ * @return number of bytes read (is always <= maxlen)
+ */
+int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen);
+int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen);
-static inline int url_is_streamed(ByteIOContext *s)
+#if FF_API_OLD_AVIO
+/**
+ * @deprecated use avio_get_str instead
+ */
+attribute_deprecated char *get_strz(AVIOContext *s, char *buf, int maxlen);
+#endif
+unsigned int avio_rb16(AVIOContext *s);
+unsigned int avio_rb24(AVIOContext *s);
+unsigned int avio_rb32(AVIOContext *s);
+uint64_t avio_rb64(AVIOContext *s);
+
+static inline int url_is_streamed(AVIOContext *s)
{
return s->is_streamed;
}
-/** @note when opened as read/write, the buffers are only used for
- writing */
-int url_fdopen(ByteIOContext **s, URLContext *h);
+/**
+ * Create and initialize a AVIOContext for accessing the
+ * resource referenced by the URLContext h.
+ * @note When the URLContext h has been opened in read+write mode, the
+ * AVIOContext can be used only for writing.
+ *
+ * @param s Used to return the pointer to the created AVIOContext.
+ * In case of failure the pointed to value is set to NULL.
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_fdopen(AVIOContext **s, URLContext *h);
-/** @warning must be called before any I/O */
-int url_setbufsize(ByteIOContext *s, int buf_size);
+#if FF_API_URL_RESETBUF
/** Reset the buffer for reading or writing.
* @note Will drop any data currently in the buffer without transmitting it.
* @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY
* to set up the buffer for writing. */
-int url_resetbuf(ByteIOContext *s, int flags);
-
-/** @note when opened as read/write, the buffers are only used for
- writing */
-int url_fopen(ByteIOContext **s, const char *filename, int flags);
-int url_fclose(ByteIOContext *s);
-URLContext *url_fileno(ByteIOContext *s);
+int url_resetbuf(AVIOContext *s, int flags);
+#endif
/**
- * Return the maximum packet size associated to packetized buffered file
- * handle. If the file is not packetized (stream like http or file on
- * disk), then 0 is returned.
+ * Create and initialize a AVIOContext for accessing the
+ * resource indicated by url.
+ * @note When the resource indicated by url has been opened in
+ * read+write mode, the AVIOContext can be used only for writing.
*
- * @param s buffered file handle
- * @return maximum packet size in bytes
+ * @param s Used to return the pointer to the created AVIOContext.
+ * In case of failure the pointed to value is set to NULL.
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
*/
-int url_fget_max_packet_size(ByteIOContext *s);
+int avio_open(AVIOContext **s, const char *url, int flags);
-int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags);
+int avio_close(AVIOContext *s);
+
+#if FF_API_OLD_AVIO
+attribute_deprecated URLContext *url_fileno(AVIOContext *s);
+
+/**
+ * @deprecated use AVIOContext.max_packet_size directly.
+ */
+attribute_deprecated int url_fget_max_packet_size(AVIOContext *s);
+
+attribute_deprecated int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags);
/** return the written or read size */
-int url_close_buf(ByteIOContext *s);
+attribute_deprecated int url_close_buf(AVIOContext *s);
+#endif
/**
* Open a write only memory stream.
* @param s new IO context
* @return zero if no error.
*/
-int url_open_dyn_buf(ByteIOContext **s);
+int url_open_dyn_buf(AVIOContext **s);
/**
* Open a write only packetized memory stream with a maximum packet
* @param max_packet_size maximum packet size (must be > 0)
* @return zero if no error.
*/
-int url_open_dyn_packet_buf(ByteIOContext **s, int max_packet_size);
+int url_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
/**
* Return the written size and a pointer to the buffer. The buffer
- * must be freed with av_free().
+ * must be freed with av_free(). If the buffer is opened with
+ * url_open_dyn_buf, then padding of FF_INPUT_BUFFER_PADDING_SIZE is
+ * added; if opened with url_open_dyn_packet_buf, no padding is added.
+ *
* @param s IO context
* @param pbuffer pointer to a byte buffer
* @return the length of the byte buffer
*/
-int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer);
+int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
-unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
- unsigned int len);
-unsigned long get_checksum(ByteIOContext *s);
-void init_checksum(ByteIOContext *s,
- unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
- unsigned long checksum);
-
-/* udp.c */
-int udp_set_remote_url(URLContext *h, const char *uri);
-int udp_get_local_port(URLContext *h);
+#if FF_API_UDP_GET_FILE
int udp_get_file_handle(URLContext *h);
+#endif
#endif /* AVFORMAT_AVIO_H */
projects / ffmpeg / blobdiff