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-rw-r--r--src/lib/ffmpeg/avio.pas590
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diff --git a/src/lib/ffmpeg/avio.pas b/src/lib/ffmpeg/avio.pas
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-(*
- * unbuffered io for ffmpeg system
- * copyright (c) 2001 Fabrice Bellard
- *
- * FFmpeg 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,
- * 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
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *)
-
-(*
- * This is a part of Pascal porting of ffmpeg.
- * - Originally by Victor Zinetz for Delphi and Free Pascal on Windows.
- * - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT
- * in the source codes.
- * - Changes and updates by the UltraStar Deluxe Team
- *)
-
-(*
- * Conversion of libavformat/avio.h
- * unbuffered I/O operations
- * revision 16100, Sat Dec 13 13:39:13 2008 UTC
- * update Tue, Jun 10 01:00:00 2009 UTC
- *
- * @warning This file has to be considered an internal but installed
- * header, so it should not be directly included in your projects.
- *)
-
-{
- * update to
- * Max. avformat version: 52.41.0, Sun Dec 6 20:15:00 2009 CET
- * MiSchi
-}
-
-unit avio;
-
-{$IFDEF FPC}
- {$MODE DELPHI }
- {$PACKENUM 4} (* use 4-byte enums *)
- {$PACKRECORDS C} (* C/C++-compatible record packing *)
-{$ELSE}
- {$MINENUMSIZE 4} (* use 4-byte enums *)
-{$ENDIF}
-
-{$I switches.inc}
-
-interface
-
-uses
- ctypes,
- avutil,
- avcodec,
- SysUtils,
- UConfig;
-
-(* unbuffered I/O *)
-
-const
- URL_RDONLY = 0;
- URL_WRONLY = 1;
- URL_RDWR = 2;
-
- (**
- * 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.
- *)
- AVSEEK_SIZE = $10000;
-
-type
- TURLInterruptCB = function (): cint; cdecl;
-
-type
- PURLProtocol = ^TURLProtocol;
-
- (**
- * URL Context.
- * New fields can be added to the end with minor version bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump.
- * sizeof(URLContext) must not be used outside libav*.
- *)
- PURLContext = ^TURLContext;
- TURLContext = record
- {$IF LIBAVFORMAT_VERSION_MAJOR >= 53}
- av_class: {const} PAVClass; ///< information for av_log(). Set by url_open().
- {$IFEND}
- prot: PURLProtocol;
- flags: cint;
- is_streamed: cint; (**< true if streamed (no seek possible), default = false *)
- max_packet_size: cint; (**< if non zero, the stream is packetized with this max packet size *)
- priv_data: pointer;
- filename: PAnsiChar; (**< specified filename *)
- end;
- PPURLContext = ^PURLContext;
-
- PURLPollEntry = ^TURLPollEntry;
- TURLPollEntry = record
- handle: PURLContext;
- events: cint;
- revents: cint;
- end;
-
- TURLProtocol = record
- name: PAnsiChar;
- url_open: function (h: PURLContext; filename: {const} PAnsiChar; flags: cint): cint; cdecl;
- url_read: function (h: PURLContext; buf: PByteArray; size: cint): cint; cdecl;
- {$IF LIBAVFORMAT_VERSION >= 52034001} // 52.34.1
- url_read_complete: function (h: PURLContext; buf: PByteArray; size: cint): cint; cdecl;
- {$IFEND}
- url_write: function (h: PURLContext; buf: PByteArray; size: cint): cint; cdecl;
- url_seek: function (h: PURLContext; pos: cint64; whence: cint): cint64; cdecl;
- url_close: function (h: PURLContext): cint; cdecl;
- next: PURLProtocol;
- {$IF (LIBAVFORMAT_VERSION >= 52001000) and (LIBAVFORMAT_VERSION < 52004000)} // 52.1.0 .. 52.4.0
- url_read_play: function (h: PURLContext): cint; cdecl;
- url_read_pause: function (h: PURLContext): cint; cdecl;
- {$IFEND}
- {$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0
- url_read_pause: function (h: PURLContext; pause: cint): cint; cdecl;
- {$IFEND}
- {$IF LIBAVFORMAT_VERSION >= 52001000} // 52.1.0
- url_read_seek: function (h: PURLContext; stream_index: cint;
- timestamp: cint64; flags: cint): cint64; cdecl;
- {$IFEND}
- end;
-
- (**
- * Bytestream IO Context.
- * New fields can be added to the end with minor version bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump.
- * sizeof(ByteIOContext) must not be used outside libav*.
- *)
- PByteIOContext = ^TByteIOContext;
- TByteIOContext = record
- buffer: PByteArray;
- buffer_size: cint;
- buf_ptr: PByteArray;
- buf_end: PByteArray;
- opaque: pointer;
- read_packet: function (opaque: pointer; buf: PByteArray; buf_size: cint): cint; cdecl;
- write_packet: function (opaque: pointer; buf: PByteArray; buf_size: cint): cint; cdecl;
- seek: function (opaque: pointer; offset: cint64; whence: cint): cint64; cdecl;
- pos: cint64; (* position in the file of the current buffer *)
- must_flush: cint; (* true if the next seek should flush *)
- eof_reached: cint; (* true if eof reached *)
- write_flag: cint; (* true if open for writing *)
- is_streamed: cint;
- max_packet_size: cint;
- checksum: culong;
- checksum_ptr: PByteArray;
- update_checksum: function (checksum: culong; buf: {const} PByteArray; size: cuint): culong; cdecl;
- error: cint; ///< contains the error code or 0 if no error happened
- {$IF (LIBAVFORMAT_VERSION >= 52001000) and (LIBAVFORMAT_VERSION < 52004000)} // 52.1.0 .. 52.4.0
- read_play: function(opaque: Pointer): cint; cdecl;
- read_pause: function(opaque: Pointer): cint; cdecl;
- {$IFEND}
- {$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0
- read_pause: function(opaque: Pointer; pause: cint): cint; cdecl;
- {$IFEND}
- {$IF LIBAVFORMAT_VERSION >= 52001000} // 52.1.0
- read_seek: function(opaque: Pointer; stream_index: cint;
- timestamp: cint64; flags: cint): cint64; cdecl;
- {$IFEND}
- end;
-
-
-{$IF LIBAVFORMAT_VERSION >= 52021000} // 52.21.0
-function url_open_protocol(puc: PPURLContext; up: PURLProtocol;
- filename: {const} PAnsiChar; flags: cint): cint;
- cdecl; external av__format;
-{$IFEND}
-function url_open(h: PPointer; filename: {const} PAnsiChar; flags: cint): cint;
- cdecl; external av__format;
-function url_read (h: PURLContext; buf: PByteArray; size: cint): cint;
- cdecl; external av__format;
-function url_write (h: PURLContext; buf: PByteArray; size: cint): cint;
- cdecl; external av__format;
-function url_seek (h: PURLContext; pos: cint64; whence: cint): cint64;
- cdecl; external av__format;
-function url_close (h: PURLContext): cint;
- cdecl; external av__format;
-function url_exist(filename: {const} PAnsiChar): cint;
- cdecl; external av__format;
-function url_filesize (h: PURLContext): cint64;
- cdecl; external av__format;
-{
- * Return the file descriptor associated with this URL. For RTP, this
- * will return only the RTP file descriptor, not the RTCP file descriptor.
- * To get both, use rtp_get_file_handles().
- *
- * @return the file descriptor associated with this URL, or <0 on error.
-}
-(* not implemented *)
-function url_get_file_handle(h: PURLContext): cint;
- cdecl; external av__format;
-
-(**
- * Return the maximum packet size associated to packetized file
- * handle. If the file is not packetized (stream like HTTP or file on
- * disk), then 0 is returned.
- *
- * @param h file handle
- * @return maximum packet size in bytes
- *)
-function url_get_max_packet_size(h: PURLContext): cint;
- cdecl; external av__format;
-procedure url_get_filename(h: PURLContext; buf: PAnsiChar; buf_size: cint);
- cdecl; external av__format;
-
-(**
- * The callback is called in blocking functions to test regulary if
- * asynchronous interruption is needed. AVERROR(EINTR) is returned
- * in this case by the interrupted function. 'NULL' means no interrupt
- * callback is given.
- *)
-procedure url_set_interrupt_cb (interrupt_cb: TURLInterruptCB);
- cdecl; external av__format;
-
-(* not implemented *)
-function url_poll(poll_table: PURLPollEntry; n: cint; timeout: cint): cint;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0
-(**
- * Pause and resume playing - only meaningful if using a network streaming
- * protocol (e.g. MMS).
- * @param pause 1 for pause, 0 for resume
- *)
-function av_url_read_pause(h: PURLContext; pause: cint): cint;
- cdecl; external av__format;
-{$IFEND}
-
-{$IF LIBAVFORMAT_VERSION >= 52001000} // 52.1.0
-(**
- * 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
- *)
-function av_url_read_seek(h: PURLContext; stream_index: cint;
- timestamp: cint64; flags: cint): cint64;
- cdecl; external av__format;
-{$IFEND}
-
-(**
-var
-{$IF LIBAVFORMAT_VERSION_MAJOR < 53}
- first_protocol: PURLProtocol; external av__format;
-{$IFEND}
- url_interrupt_cb: PURLInterruptCB; external av__format;
-**)
-
-{
-* If protocol is NULL, returns the first registered protocol,
-* if protocol is non-NULL, returns the next registered protocol after protocol,
-* or NULL if protocol is the last one.
-}
-{$IF LIBAVFORMAT_VERSION >= 52002000} // 52.2.0
-function av_protocol_next(p: PURLProtocol): PURLProtocol;
- cdecl; external av__format;
-{$IFEND}
-
-{$IF LIBAVFORMAT_VERSION <= 52028000} // 52.28.0
-(**
- * @deprecated Use av_register_protocol() instead.
- *)
-function register_protocol(protocol: PURLProtocol): cint;
- cdecl; external av__format;
-(** Alias for register_protocol() *)
-function av_register_protocol(protocol: PURLProtocol): cint;
- cdecl; external av__format name 'register_protocol';
-{$ELSE}
-function av_register_protocol(protocol: PURLProtocol): cint;
- cdecl; external av__format;
-{$IFEND}
-
-type
- TReadWriteFunc = function(opaque: Pointer; buf: PByteArray; buf_size: cint): cint; cdecl;
- TSeekFunc = function(opaque: Pointer; offset: cint64; whence: cint): cint64; cdecl;
-
-function init_put_byte(s: PByteIOContext;
- buffer: PByteArray;
- buffer_size: cint; write_flag: cint;
- opaque: pointer;
- read_packet: TReadWriteFunc;
- write_packet: TReadWriteFunc;
- seek: TSeekFunc): cint;
- cdecl; external av__format;
-{$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0
-function av_alloc_put_byte(
- buffer: PByteArray;
- buffer_size: cint;
- write_flag: cint;
- opaque: Pointer;
- read_packet: TReadWriteFunc;
- write_packet: TReadWriteFunc;
- seek: TSeekFunc): PByteIOContext;
- cdecl; external av__format;
-{$IFEND}
-
-procedure put_byte(s: PByteIOContext; b: cint);
- cdecl; external av__format;
-procedure put_buffer (s: PByteIOContext; buf: {const} PByteArray; size: cint);
- cdecl; external av__format;
-procedure put_le64(s: PByteIOContext; val: cuint64);
- cdecl; external av__format;
-procedure put_be64(s: PByteIOContext; val: cuint64);
- cdecl; external av__format;
-procedure put_le32(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_be32(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_le24(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_be24(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_le16(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_be16(s: PByteIOContext; val: cuint);
- cdecl; external av__format;
-procedure put_tag(s: PByteIOContext; tag: {const} PAnsiChar);
- cdecl; external av__format;
-
-procedure put_strz(s: PByteIOContext; buf: {const} PAnsiChar);
- cdecl; external av__format;
-
-(**
- * fseek() equivalent for ByteIOContext.
- * @return new position or AVERROR.
- *)
-function url_fseek(s: PByteIOContext; offset: cint64; whence: cint): cint64;
- cdecl; external av__format;
-
-(**
- * Skip given number of bytes forward.
- * @param offset number of bytes
- *)
-procedure url_fskip(s: PByteIOContext; offset: cint64);
- cdecl; external av__format;
-
-(**
- * ftell() equivalent for ByteIOContext.
- * @return position or AVERROR.
- *)
-function url_ftell(s: PByteIOContext): cint64;
- cdecl; external av__format;
-
-(**
- * Gets the filesize.
- * @return filesize or AVERROR
- *)
-function url_fsize(s: PByteIOContext): cint64;
- cdecl; external av__format;
-
-(**
- * feof() equivalent for ByteIOContext.
- * @return non zero if and only if end of file
- *)
-function url_feof(s: PByteIOContext): cint;
- cdecl; external av__format;
-
-function url_ferror(s: PByteIOContext): cint;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0
-function av_url_read_fpause(h: PByteIOContext; pause: cint): cint;
- cdecl; external av__format;
-{$IFEND}
-{$IF LIBAVFORMAT_VERSION >= 52001000} // 52.1.0
-function av_url_read_fseek(h: PByteIOContext; stream_index: cint;
- timestamp: cint64; flags: cint): cint64;
- cdecl; external av__format;
-{$IFEND}
-
-const
- URL_EOF = -1;
-(** @note return URL_EOF (-1) if EOF *)
-function url_fgetc(s: PByteIOContext): cint;
- cdecl; external av__format;
-
-(** @warning currently size is limited *)
-function url_fprintf(s: PByteIOContext; fmt: {const} PAnsiChar; args: array of const): cint;
- cdecl; external av__format;
-
-(** @note unlike fgets, the EOL character is not returned and a whole
- line is parsed. return NULL if first char read was EOF *)
-function url_fgets(s: PByteIOContext; buf: PAnsiChar; buf_size: cint): PAnsiChar;
- cdecl; external av__format;
-
-procedure put_flush_packet (s: PByteIOContext);
- cdecl; external av__format;
-
-
-(**
- * Reads size bytes from ByteIOContext into buf.
- * @returns number of bytes read or AVERROR
- *)
-function get_buffer(s: PByteIOContext; buf: PByteArray; size: cint): cint;
- cdecl; external av__format;
-
-(**
- * 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
- *)
-function get_partial_buffer(s: PByteIOContext; buf: PByteArray; size: cint): cint;
- cdecl; external av__format;
-
-(** @note return 0 if EOF, so you cannot use it if EOF handling is
- necessary *)
-function get_byte(s: PByteIOContext): cint;
- cdecl; external av__format;
-function get_le24(s: PByteIOContext): cuint;
- cdecl; external av__format;
-function get_le32(s: PByteIOContext): cuint;
- cdecl; external av__format;
-function get_le64(s: PByteIOContext): cuint64;
- cdecl; external av__format;
-function get_le16(s: PByteIOContext): cuint;
- cdecl; external av__format;
-
-function get_strz(s: PByteIOContext; buf: PAnsiChar; maxlen: cint): PAnsiChar;
- cdecl; external av__format;
-function get_be16(s: PByteIOContext): cuint;
- cdecl; external av__format;
-function get_be24(s: PByteIOContext): cuint;
- cdecl; external av__format;
-function get_be32(s: PByteIOContext): cuint;
- cdecl; external av__format;
-function get_be64(s: PByteIOContext): cuint64;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION >= 51017001} // 51.17.1
-function ff_get_v(bc: PByteIOContext): cuint64;
- cdecl; external av__format;
-{$IFEND}
-
-function url_is_streamed(s: PByteIOContext): cint; {$IFDEF HasInline}inline;{$ENDIF}
-
-(** @note when opened as read/write, the buffers are only used for
- writing *)
-{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0
-function url_fdopen (var s: PByteIOContext; h: PURLContext): cint;
-{$ELSE}
-function url_fdopen (s: PByteIOContext; h: PURLContext): cint;
-{$IFEND}
- cdecl; external av__format;
-
-(** @warning must be called before any I/O *)
-function url_setbufsize (s: PByteIOContext; buf_size: cint): cint;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION_MAJOR < 53}
-{$IF LIBAVFORMAT_VERSION >= 51015000} // 51.15.0
-(** Reset the buffer for reading or writing.
- * @note Will drop any data currently in the buffer without transmitting it.
- * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY
- * to set up the buffer for writing. *)
-function url_resetbuf(s: PByteIOContext; flags: cint): cint;
- cdecl; external av__format;
-{$IFEND}
-{$IFEND}
-
-(** @note when opened as read/write, the buffers are only used for
- writing *)
-{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0
-function url_fopen(var s: PByteIOContext; filename: {const} PAnsiChar; flags: cint): cint;
-{$ELSE}
-function url_fopen(s: PByteIOContext; filename: {const} PAnsiChar; flags: cint): cint;
-{$IFEND}
- cdecl; external av__format;
-function url_fclose(s: PByteIOContext): cint;
- cdecl; external av__format;
-function url_fileno(s: PByteIOContext): PURLContext;
- cdecl; external av__format;
-
-(**
- * 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.
- *
- * @param s buffered file handle
- * @return maximum packet size in bytes
- *)
-function url_fget_max_packet_size (s: PByteIOContext): cint;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0
-function url_open_buf(var s: PByteIOContext; buf: PAnsiChar; buf_size: cint; flags: cint): cint;
-{$ELSE}
-function url_open_buf(s: PByteIOContext; buf: PAnsiChar; buf_size: cint; flags: cint): cint;
-{$IFEND}
- cdecl; external av__format;
-
-(** return the written or read size *)
-function url_close_buf(s: PByteIOContext): cint;
- cdecl; external av__format;
-
-(**
- * Open a write only memory stream.
- *
- * @param s new IO context
- * @return zero if no error.
- *)
-{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0
-function url_open_dyn_buf(var s: PByteIOContext): cint;
-{$ELSE}
-function url_open_dyn_buf(s: PByteIOContext): cint;
-{$IFEND}
- cdecl; external av__format;
-
-(**
- * Open a write only packetized memory stream with a maximum packet
- * size of 'max_packet_size'. The stream is stored in a memory buffer
- * with a big endian 4 byte header giving the packet size in bytes.
- *
- * @param s new IO context
- * @param max_packet_size maximum packet size (must be > 0)
- * @return zero if no error.
- *)
-{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0
-function url_open_dyn_packet_buf(var s: PByteIOContext; max_packet_size: cint): cint;
-{$ELSE}
-function url_open_dyn_packet_buf(s: PByteIOContext; max_packet_size: cint): cint;
-{$IFEND}
- cdecl; external av__format;
-
-(**
- * Return the written size and a pointer to the buffer. The buffer
- * must be freed with av_free().
- * @param s IO context
- * @param pbuffer pointer to a byte buffer
- * @return the length of the byte buffer
- *)
-function url_close_dyn_buf(s: PByteIOContext; pbuffer:PPointer): cint;
- cdecl; external av__format;
-
-{$IF LIBAVFORMAT_VERSION >= 51017001} // 51.17.1
-function ff_crc04C11DB7_update(checksum: culong; buf: {const} PByteArray;
- len: cuint): culong;
- cdecl; external av__format;
-{$IFEND}
-function get_checksum(s: PByteIOContext): culong;
- cdecl; external av__format;
-procedure init_gsum(s: PByteIOContext;
- update_checksum: pointer;
- checksum: culong);
- cdecl; external av__format;
-
-(* udp.c *)
-function udp_set_remote_url(h: PURLContext; uri: {const} PAnsiChar): cint;
- cdecl; external av__format;
-function udp_get_local_port(h: PURLContext): cint;
- cdecl; external av__format;
-{$IF LIBAVFORMAT_VERSION_MAJOR <= 52}
-function udp_get_file_handle(h: PURLContext): cint;
- cdecl; external av__format;
-{$IFEND}
-
-implementation
-
-function url_is_streamed(s: PByteIOContext): cint;
-begin
- Result := s^.is_streamed;
-end;
-
-end.