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Diffstat (limited to 'src/lib/ffmpeg/avio.pas')
| -rw-r--r-- | src/lib/ffmpeg/avio.pas | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/avio.pas b/src/lib/ffmpeg/avio.pas new file mode 100644 index 00000000..70912e60 --- /dev/null +++ b/src/lib/ffmpeg/avio.pas @@ -0,0 +1,538 @@ +(* + * 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 + * revision 12658, Mon Mar 31 17:31:11 2008 UTC + *) + +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, + UConfig; + +(* output byte stream handling *) + +type + TOffset = cint64; + +(* 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(). + {$IFEND} + prot: PURLProtocol; + flags: cint; + is_streamed: cint; (**< true if streamed (no seek possible), default = false *) + max_packet_size: cint; (**< if non zero, the stream is packetized with this max packet size *) + priv_data: pointer; + filename: PChar; (**< specified filename *) + end; + + PURLPollEntry = ^TURLPollEntry; + TURLPollEntry = record + handle: PURLContext; + events: cint; + revents: cint; + end; + + TURLProtocol = record + name: PChar; + url_open: function (h: PURLContext; filename: {const} PChar; flags: cint): cint; cdecl; + url_read: function (h: PURLContext; buf: PChar; size: cint): cint; cdecl; + url_write: function (h: PURLContext; buf: PChar; size: cint): cint; cdecl; + url_seek: function (h: PURLContext; pos: TOffset; whence: cint): TOffset; cdecl; + url_close: function (h: PURLContext): cint; cdecl; + next: PURLProtocol; + {$IF (LIBAVFORMAT_VERSION >= 52001000) and (LIBAVFORMAT_VERSION < 52004000)} // 52.1.0 .. 52.4.0 + url_read_play: function (h: PURLContext): cint; + url_read_pause: function (h: PURLContext): cint; + {$IFEND} + {$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): TOffset; cdecl; + {$IFEND} + end; + + (** + * Bytestream IO Context. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(ByteIOContext) must not be used outside libav*. + *) + PByteIOContext = ^TByteIOContext; + TByteIOContext = record + buffer: PChar; + buffer_size: cint; + buf_ptr: PChar; + buf_end: PChar; + opaque: pointer; + read_packet: function (opaque: pointer; buf: PChar; buf_size: cint): cint; cdecl; + write_packet: function (opaque: pointer; buf: PChar; buf_size: cint): cint; cdecl; + seek: function (opaque: pointer; offset: TOffset; whence: cint): TOffset; cdecl; + pos: TOffset; (* position in the file of the current buffer *) + must_flush: cint; (* true if the next seek should flush *) + eof_reached: cint; (* true if eof reached *) + write_flag: cint; (* true if open for writing *) + is_streamed: cint; + max_packet_size: cint; + checksum: culong; + checksum_ptr: PCuchar; + update_checksum: function (checksum: culong; buf: {const} PChar; size: cuint): culong; cdecl; + error: cint; ///< contains the error code or 0 if no error happened + {$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): TOffset; cdecl; + {$IFEND} + end; + +function url_open(h: PPointer; filename: {const} PChar; flags: cint): cint; + cdecl; external av__format; +function url_read (h: PURLContext; buf: PChar; size: cint): cint; + cdecl; external av__format; +function url_write (h: PURLContext; buf: PChar; size: cint): cint; + cdecl; external av__format; +function url_seek (h: PURLContext; pos: TOffset; whence: cint): TOffset; + cdecl; external av__format; +function url_close (h: PURLContext): cint; + cdecl; external av__format; +function url_exist(filename: {const} PChar): cint; + cdecl; external av__format; +function url_filesize (h: PURLContext): TOffset; + cdecl; external av__format; + +(** + * Return the maximum packet size associated to packetized file + * handle. If the file is not packetized (stream like HTTP or file on + * disk), then 0 is returned. + * + * @param h file handle + * @return maximum packet size in bytes + *) +function url_get_max_packet_size(h: PURLContext): cint; + cdecl; external av__format; +procedure url_get_filename(h: PURLContext; buf: PChar; buf_size: cint); + cdecl; external av__format; + +(** + * The callback is called in blocking functions to test regulary if + * asynchronous interruption is needed. AVERROR(EINTR) is returned + * in this case by the interrupted function. 'NULL' means no interrupt + * callback is given. + *) +procedure url_set_interrupt_cb (interrupt_cb: TURLInterruptCB); + cdecl; external av__format; + +(* not implemented *) +function url_poll(poll_table: PURLPollEntry; n: cint; timeout: cint): cint; + cdecl; external av__format; + +{$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): TOffset; + cdecl; external av__format; +{$IFEND} + +{ +var + first_protocol: PURLProtocol; external av__format; + url_interrupt_cb: PURLInterruptCB; external av__format; +} + +{$IF LIBAVFORMAT_VERSION >= 52002000} // 52.2.0 +function av_protocol_next(p: PURLProtocol): PURLProtocol; + cdecl; external av__format; +{$IFEND} + +function register_protocol (protocol: PURLProtocol): cint; + cdecl; external av__format; + +type + TReadWriteFunc = function (opaque: Pointer; buf: PChar; buf_size: cint): cint; cdecl; + TSeekFunc = function (opaque: Pointer; offset: TOffset; whence: cint): TOffset; cdecl; + +function init_put_byte(s: PByteIOContext; + buffer: PChar; + buffer_size: cint; write_flag: cint; + opaque: pointer; + read_packet: TReadWriteFunc; + write_packet: TReadWriteFunc; + seek: TSeekFunc): cint; + cdecl; external av__format; +{$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0 +function av_alloc_put_byte( + buffer: PChar; + buffer_size: cint; + write_flag: cint; + opaque: Pointer; + read_packet: TReadWriteFunc; + write_packet: TReadWriteFunc; + seek: TSeekFunc): PByteIOContext; + cdecl; external av__format; +{$IFEND} + +procedure put_byte(s: PByteIOContext; b: cint); + cdecl; external av__format; +procedure put_buffer (s: PByteIOContext; buf: {const} PChar; size: cint); + cdecl; external av__format; +procedure put_le64(s: PByteIOContext; val: cuint64); + cdecl; external av__format; +procedure put_be64(s: PByteIOContext; val: cuint64); + cdecl; external av__format; +procedure put_le32(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_be32(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_le24(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_be24(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_le16(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_be16(s: PByteIOContext; val: cuint); + cdecl; external av__format; +procedure put_tag(s: PByteIOContext; tag: {const} PChar); + cdecl; external av__format; + +procedure put_strz(s: PByteIOContext; buf: {const} PChar); + cdecl; external av__format; + +(** + * fseek() equivalent for ByteIOContext. + * @return new position or AVERROR. + *) +function url_fseek(s: PByteIOContext; offset: TOffset; whence: cint): TOffset; + cdecl; external av__format; + +(** + * Skip given number of bytes forward. + * @param offset number of bytes + *) +procedure url_fskip(s: PByteIOContext; offset: TOffset); + cdecl; external av__format; + +(** + * ftell() equivalent for ByteIOContext. + * @return position or AVERROR. + *) +function url_ftell(s: PByteIOContext): TOffset; + cdecl; external av__format; + +(** + * Gets the filesize. + * @return filesize or AVERROR + *) +function url_fsize(s: PByteIOContext): TOffset; + cdecl; external av__format; + +(** + * feof() equivalent for ByteIOContext. + * @return non zero if and only if end of file + *) +function url_feof(s: PByteIOContext): cint; + cdecl; external av__format; + +function url_ferror(s: PByteIOContext): cint; + cdecl; external av__format; + +{$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): TOffset; + 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} PChar; 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: PChar; buf_size: cint): PChar; + 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: PChar; 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: PChar; 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: PChar; maxlen: cint): PChar; + 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; + +{$IF LIBAVFORMAT_VERSION >= 51015000} // 51.15.0 +(** Reset the buffer for reading or writing. + * @note Will drop any data currently in the buffer without transmitting it. + * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY + * to set up the buffer for writing. *) +function url_resetbuf(s: PByteIOContext; flags: cint): cint; + cdecl; external av__format; +{$IFEND} + +(** @note when opened as read/write, the buffers are only used for + writing *) +{$IF LIBAVFORMAT_VERSION >= 52000000} // 52.0.0 +function url_fopen(var s: PByteIOContext; filename: {const} PChar; flags: cint): cint; +{$ELSE} +function url_fopen(s: PByteIOContext; filename: {const} PChar; 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: PChar; buf_size: cint; flags: cint): cint; +{$ELSE} +function url_open_buf(s: PByteIOContext; buf: PChar; buf_size: cint; flags: cint): cint; +{$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; + +{$IF LIBAVFORMAT_VERSION >= 51017001} // 51.17.1 +function ff_crc04C11DB7_update(checksum: culong; buf: {const} PChar; len: cuint): culong; + cdecl; external av__format; +{$IFEND} +function get_checksum(s: PByteIOContext): culong; + cdecl; external av__format; +procedure init_checksum (s: PByteIOContext; update_checksum: pointer; checksum: culong); + cdecl; external av__format; + +(* udp.c *) +function udp_set_remote_url(h: PURLContext; uri: {const} PChar): cint; + cdecl; external av__format; +function udp_get_local_port(h: PURLContext): cint; + cdecl; external av__format; +function udp_get_file_handle(h: PURLContext): cint; + cdecl; external av__format; + +implementation + +function url_is_streamed(s: PByteIOContext): cint; +begin + Result := s^.is_streamed; +end; + +end. |