diff options
| -rw-r--r-- | src/lib/ffmpeg/avio.pas | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/src/lib/ffmpeg/avio.pas b/src/lib/ffmpeg/avio.pas index 171fe5bd..25c28ef5 100644 --- a/src/lib/ffmpeg/avio.pas +++ b/src/lib/ffmpeg/avio.pas @@ -146,7 +146,23 @@ type * certain there was either an error or the end of file was reached. *) url_write: function (h: PURLContext; buf: PByteArray; size: cint): cint; cdecl; + +(** + * Changes 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. + *) url_seek: function (h: PURLContext; pos: cint64; whence: cint): cint64; cdecl; + url_close: function (h: PURLContext): cint; cdecl; next: PURLProtocol; {$IF (LIBAVFORMAT_VERSION >= 52001000) and (LIBAVFORMAT_VERSION < 52004000)} // 52.1.0 .. 52.4.0 @@ -264,12 +280,18 @@ function url_seek (h: PURLContext; pos: cint64; whence: cint): cint64; *) function url_close (h: PURLContext): cint; cdecl; external av__format; + +(** + * Returns a non-zero value if the resource indicated by url + * exists, 0 otherwise. + *) {$IF LIBAVFORMAT_VERSION < 52047000} // 52.47.0 function url_exist(filename: {const} PAnsiChar): cint; {$ELSE} function url_exist(url: {const} PAnsiChar): cint; {$IFEND} cdecl; external av__format; + function url_filesize (h: PURLContext): cint64; cdecl; external av__format; @@ -496,7 +518,7 @@ procedure put_flush_packet (s: PByteIOContext); (** * Reads size bytes from ByteIOContext into buf. - * @returns number of bytes read or AVERROR + * @return number of bytes read or AVERROR *) function get_buffer(s: PByteIOContext; buf: PByteArray; size: cint): cint; cdecl; external av__format; @@ -505,7 +527,7 @@ function get_buffer(s: PByteIOContext; buf: PByteArray; size: cint): cint; * 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 + * @return number of bytes read or AVERROR *) function get_partial_buffer(s: PByteIOContext; buf: PByteArray; size: cint): cint; cdecl; external av__format; @@ -574,6 +596,24 @@ function url_resetbuf(s: PByteIOContext; flags: cint): cint; {$IFEND} {$IFEND} +{$IF LIBAVFORMAT_VERSION >= 52061000} // 52.61.0 +(** + * Rewinds the ByteIOContext using the specified buffer containing the first buf_size bytes of the file. + * Used after probing to avoid seeking. + * Joins buf and s->buffer, taking any overlap into consideration. + * @note s->buffer must overlap with buf or they can't be joined and the function fails + * @note This function is NOT part of the public API + * + * @param s The read-only ByteIOContext to rewind + * @param buf The probe buffer containing the first buf_size bytes of the file + * @param buf_size The size of buf + * @return 0 in case of success, a negative value corresponding to an + * AVERROR code in case of failure + *) +function ff_rewind_with_probe_data(s: PByteIOContext; buf: PAnsiChar; buf_size: cint): cint; + cdecl; external av__format; +{$IFEND} + (** * Creates and initializes a ByteIOContext for accessing the * resource indicated by url. |