/*
- * unbuffered io for ffmpeg system
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef AVIO_H
-#define AVIO_H
+#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>
-/* output byte stream handling */
+#include "libavutil/common.h"
+#include "libavutil/log.h"
-typedef int64_t offset_t;
+#include "libavformat/version.h"
/* unbuffered I/O */
-struct URLContext {
+/**
+ * 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;
-#if LIBAVFORMAT_VERSION_INT >= (52<<16)
- char *filename; /**< specified filename */
-#else
- char filename[1]; /**< specified filename */
-#endif
-};
-
-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);
-int url_open(URLContext **h, const char *filename, int flags);
+/**
+ * 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 *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);
-offset_t url_seek(URLContext *h, offset_t pos, int whence);
+
+/**
+ * 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);
-offset_t url_filesize(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
+ * 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
+ * The callback is called in blocking functions to test regulary if
* asynchronous interruption is needed. AVERROR(EINTR) is returned
* in this case by the interrupted function. 'NULL' means no interrupt
- * callback is given. i
+ * callback is given.
*/
void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
int url_poll(URLPollEntry *poll_table, int n, int timeout);
/**
- * 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.
+ * Pause and resume playing - only meaningful if using a network streaming
+ * protocol (e.g. MMS).
+ * @param pause 1 for pause, 0 for resume
*/
-#define AVSEEK_SIZE 0x10000
+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 *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);
- offset_t (*url_seek)(URLContext *h, offset_t pos, int whence);
+ 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;
-int register_protocol(URLProtocol *protocol);
+/**
+ * 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);
+/**
+ * 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(AVIOContext) must not be used outside libav*.
+ */
typedef struct {
unsigned char *buffer;
int buffer_size;
void *opaque;
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
- offset_t (*seek)(void *opaque, offset_t offset, int whence);
- offset_t pos; /**< position in the file of the current buffer */
+ int64_t (*seek)(void *opaque, int64_t offset, int whence);
+ int64_t pos; /**< position in the file of the current buffer */
int must_flush; /**< true if the next seek should flush */
int eof_reached; /**< true if eof reached */
int write_flag; /**< true if open for writing */
unsigned char *checksum_ptr;
unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
int error; ///< contains the error code or 0 if no error happened
-} ByteIOContext;
+ int (*read_pause)(void *opaque, int pause);
+ int64_t (*read_seek)(void *opaque, int stream_index,
+ int64_t timestamp, int flags);
+} 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,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
- offset_t (*seek)(void *opaque, offset_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);
-
-void put_strz(ByteIOContext *s, const char *buf);
-
-offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence);
-void url_fskip(ByteIOContext *s, offset_t offset);
-offset_t url_ftell(ByteIOContext *s);
-offset_t url_fsize(ByteIOContext *s);
-int url_feof(ByteIOContext *s);
-int url_ferror(ByteIOContext *s);
+ int64_t (*seek)(void *opaque, int64_t offset, int whence));
+attribute_deprecated AVIOContext *av_alloc_put_byte(
+ 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));
+/**
+ * @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);
+/**
+ * @}
+ */
+
+
+/**
+ * @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)
-/** @note return URL_EOF (-1) if EOF */
-int url_fgetc(ByteIOContext *s);
+attribute_deprecated int url_fgetc(AVIOContext *s);
+/**
+ * @}
+ */
+#endif
+
+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
+
+/**
+ * Write a NULL-terminated string.
+ * @return number of bytes written.
+ */
+int avio_put_str(AVIOContext *s, const char *str);
+
+/**
+ * Convert an UTF-8 string to UTF-16LE and write it.
+ * @return number of bytes written.
+ */
+int avio_put_str16le(AVIOContext *s, const char *str);
+
+/**
+ * fseek() equivalent for AVIOContext.
+ * @return new position or AVERROR.
+ */
+int64_t avio_seek(AVIOContext *s, int64_t offset, int whence);
+
+/**
+ * Skip given number of bytes forward
+ * @return new position or AVERROR.
+ */
+#define avio_skip(s, offset) avio_seek(s, offset, SEEK_CUR)
+
+/**
+ * ftell() equivalent for AVIOContext.
+ * @return position or AVERROR.
+ */
+#define avio_tell(s) avio_seek((s), 0, SEEK_CUR)
+
+/**
+ * Get the filesize.
+ * @return filesize or AVERROR
+ */
+int64_t avio_size(AVIOContext *s);
+
+/**
+ * feof() equivalent for AVIOContext.
+ * @return non zero if and only if end of file
+ */
+int url_feof(AVIOContext *s);
+
+int url_ferror(AVIOContext *s);
+
+int av_url_read_fpause(AVIOContext *h, int pause);
+int64_t av_url_read_fseek(AVIOContext *h, int stream_index,
+ int64_t timestamp, int flags);
/** @warning currently size is limited */
#ifdef __GNUC__
-int url_fprintf(ByteIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
#else
-int url_fprintf(ByteIOContext *s, const char *fmt, ...);
+int url_fprintf(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);
+ line is parsed. return NULL if first char read was EOF */
+attribute_deprecated char *url_fgets(AVIOContext *s, char *buf, int buf_size);
+#endif
+
+void put_flush_packet(AVIOContext *s);
-void put_flush_packet(ByteIOContext *s);
-int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
-int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size);
+/**
+ * Read size bytes from AVIOContext into buf.
+ * @return number of bytes read or AVERROR
+ */
+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);
-
-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);
-
-static inline int url_is_streamed(ByteIOContext *s)
+ necessary */
+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);
+
+/**
+ * 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);
+
+/**
+ * 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);
+
+#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);
+
+uint64_t ff_get_v(AVIOContext *bc);
+
+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);
+int url_setbufsize(AVIOContext *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);
+int url_resetbuf(AVIOContext *s, int flags);
+#endif
-/** @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);
+/**
+ * Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
+ * Used after probing to avoid seeking.
+ * Joins buf and s->buffer, taking any overlap into consideration.
+ * @note s->buffer must overlap with buf or they can't be joined and the function fails
+ * @note This function is NOT part of the public API
+ *
+ * @param s The read-only AVIOContext to rewind
+ * @param buf The probe buffer containing the first buf_size bytes of the file
+ * @param buf_size The size of buf
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int ff_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
/**
- * 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 h 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);
+URLContext *url_fileno(AVIOContext *s);
+
+#if FF_API_OLD_AVIO
+/**
+ * @deprecated use AVIOContext.max_packet_size directly.
+ */
+attribute_deprecated int url_fget_max_packet_size(AVIOContext *s);
+#endif
+
+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);
+int url_close_buf(AVIOContext *s);
/**
* 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 pointer to a byte buffer
+ * @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 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);
+unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
+ unsigned int len);
+unsigned long get_checksum(AVIOContext *s);
+void init_checksum(AVIOContext *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