diff options
Diffstat (limited to 'src/lib/ffmpeg7/avio.pas')
| -rw-r--r-- | src/lib/ffmpeg7/avio.pas | 889 |
1 files changed, 0 insertions, 889 deletions
diff --git a/src/lib/ffmpeg7/avio.pas b/src/lib/ffmpeg7/avio.pas deleted file mode 100644 index 426f5f75..00000000 --- a/src/lib/ffmpeg7/avio.pas +++ /dev/null @@ -1,889 +0,0 @@ -(* - * copyright (c) 2001 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * 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 - * @warning This file has to be considered an internal but installed - * header, so it should not be directly included in your projects. - * - * update to - * avformat version: 52.110.0 - *) - -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, - {$IFDEF UNIX} - BaseUnix, // for SEEK_CUR - {$ENDIF} - avcodec, - avutil, - SysUtils, - UConfig; - -(** - * Those FF_API_* defines are not part of public API. - * They may change, break or disappear at any time. - *) -const - FF_API_MAX_STREAMS = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_OLD_METADATA = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_OLD_METADATA2 = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_URL_CLASS = (LIBAVFORMAT_VERSION_MAJOR >= 53); - FF_API_URL_RESETBUF = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_REGISTER_PROTOCOL = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_GUESS_FORMAT = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_UDP_GET_FILE = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_URL_SPLIT = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_ALLOC_FORMAT_CONTEXT = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_PARSE_FRAME_PARAM = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_READ_SEEK = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_LAVF_UNUSED = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_PARAMETERS_CODEC_ID = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_FIRST_FORMAT = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_SYMVER = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_OLD_AVIO = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_INDEX_BUILT = (LIBAVFORMAT_VERSION_MAJOR < 53); - FF_API_DUMP_FORMAT = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_PARSE_DATE = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_FIND_INFO_TAG = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_PKT_DUMP = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_GUESS_IMG2_CODEC = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_SDP_CREATE = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_ALLOC_OUTPUT_CONTEXT = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_FORMAT_PARAMETERS = (LIBAVFORMAT_VERSION_MAJOR < 54); - FF_API_FLAG_RTP_HINT = (LIBAVFORMAT_VERSION_MAJOR < 54); - -const - AVIO_SEEKABLE_NORMAL = 0001; (**< Seeking works like for a local file *) - URL_PROTOCOL_FLAG_NESTED_SCHEME = 1; (*< The protocol name can be the first part of a nested protocol scheme *) - -type - TReadWriteFunc = function(opaque: Pointer; buf: PByteArray; buf_size: cint): cint; cdecl; - TSeekFunc = function(opaque: Pointer; offset: cint64; whence: cint): cint64; cdecl; - -type -(** - * 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*. - * - * @note None of the function pointers in AVIOContext should be called - * directly, they should only be set by the client application - * when implementing custom I/O. Normally these are set to the - * function pointers specified in avio_alloc_context() - *) - PAVIOContext = ^TAVIOContext; - TAVIOContext = record - buffer: PByteArray; (**< Start of the buffer. *) - buffer_size: cint; (**< Maximum buffer size *) - buf_ptr: PByteArray; (**< Current position in the buffer *) - buf_end: PByteArray; (**< End of the data, may be less than - buffer+buffer_size if the read function returned - less data than requested, e.g. for streams where - no more data has been received yet. *) - opaque: pointer; (**< A private pointer, passed to the read/write/seek/... - functions. *) - read_packet: TReadWriteFunc; - write_packet: TReadWriteFunc; - seek: TSeekFunc; - 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 *) -{$IF FF_API_OLD_AVIO} - is_streamed: cint; { deprecated } -{$ENDIF} - max_packet_size: cint; - checksum: culong; - checksum_ptr: PByteArray; - update_checksum: function (checksum: culong; buf: {const} PAnsiChar; size: cuint): culong; cdecl; - error: cint; (**< contains the error code or 0 if no error happened *) - (** - * Pause or resume playback for network streaming protocols - e.g. MMS. - *) - read_pause: function(opaque: Pointer; pause: cint): cint; cdecl; - (** - * Seek to a given timestamp in stream with the specified stream_index. - * Needed for some network streaming protocols which don't support seeking - * to byte position. - *) - read_seek: function(opaque: Pointer; stream_index: cint; - timestamp: cint64; flags: cint): cint64; cdecl; - (** - * A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable. - *) - seekable: cint; - end; - -(* unbuffered I/O *) - -{$IF FF_API_OLD_AVIO} - PURLProtocol = ^TURLProtocol; - -(** - * URL Context. - * New fields can be added to the end with minor version bumps. - * Removal, reordering and changes to existing fields require a major - * version bump. - * sizeof(URLContext) must not be used outside libav*. - * @deprecated This struct will be made private - *) - PPURLContext = ^PURLContext; - PURLContext = ^TURLContext; - TURLContext = record -{$IF FF_API_URL_CLASS} - av_class: {const} PAVClass; ///< information for av_log(). Set by url_open(). -{$ENDIF} - 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 URL *) - is_connected: cint; - end; - -(** - * @deprecated This struct is to be made private. Use the higher-level - * AVIOContext-based API instead. - *) - TURLProtocol = record - name: PAnsiChar; - url_open: function (h: PURLContext; url: {const} PAnsiChar; flags: cint): cint; cdecl; - url_read: function (h: PURLContext; buf: PByteArray; size: cint): cint; cdecl; - url_write: function (h: PURLContext; {const} 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; - url_read_pause: function (h: PURLContext; pause: cint): cint; cdecl; - url_read_seek: function (h: PURLContext; stream_index: cint; - timestamp: cint64; flags: cint): cint64; cdecl; - url_get_file_handle: function (h: PURLContext): cint; cdecl; - priv_data_size: cint; - {const} priv_data_class: PAVClass; - flags: cint; - url_check: function (h: PURLContext; mask: cint): cint; - end; - - PURLPollEntry = ^TURLPollEntry; - TURLPollEntry = record - handle: PURLContext; - events: cint; - revents: cint; - end; - -(* not implemented *) -function url_poll(poll_table: PURLPollEntry; n: cint; timeout: cint): cint; - cdecl; external av__format; deprecated; - -const -(** - * @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. - * @ - *) - URL_RDONLY = 0; (**< read-only *) - URL_WRONLY = 1; (**< write-only *) - 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. - *) - URL_FLAG_NONBLOCK = 4; - -type - PURLInterruptCB = ^TURLInterruptCB; - TURLInterruptCB = function (): cint; cdecl; - -{ -var - url_interrupt_cb: PURLInterruptCB; cvar; external: av__format; -} - -(** - * @defgroup old_url_funcs Old url_* functions - * @eprecated. Use the buffered API based on AVIOContext instead. - * @ - *) -function url_open_protocol(puc: PPURLContext; up: PURLProtocol; - url: {const} PAnsiChar; flags: cint): cint; - cdecl; external av__format; deprecated; -function url_alloc(h: PPURLContext; {const} url: PAnsiChar; flags: cint): cint; - cdecl; external av__format; deprecated; -function url_connect(h: PURLContext): cint; - cdecl; external av__format; deprecated; -function url_open(h: PPointer; url: {const} PAnsiChar; flags: cint): cint; - cdecl; external av__format; deprecated; -function url_read (h: PURLContext; buf: PByteArray; size: cint): cint; - cdecl; external av__format; deprecated; -function url_read_complete (h: PURLContext; buf: PByteArray; size: cint): cint; - cdecl; external av__format; deprecated; -function url_write (h: PURLContext; {const} buf: PByteArray; size: cint): cint; - cdecl; external av__format; deprecated; -function url_seek (h: PURLContext; pos: cint64; whence: cint): cint64; - cdecl; external av__format; deprecated; -function url_close (h: PURLContext): cint; - cdecl; external av__format; deprecated; -function url_filesize (h: PURLContext): cint64; - cdecl; external av__format; deprecated; -function url_get_file_handle(h: PURLContext): cint; - cdecl; external av__format; deprecated; -function url_get_max_packet_size(h: PURLContext): cint; - cdecl; external av__format; deprecated; -procedure url_get_filename(h: PURLContext; buf: PAnsiChar; buf_size: cint); - cdecl; external av__format; deprecated; -function av_url_read_pause(h: PURLContext; pause: cint): cint; - cdecl; external av__format; deprecated; -function av_url_read_seek(h: PURLContext; stream_index: cint; - timestamp: cint64; flags: cint): cint64; - cdecl; external av__format; deprecated; -procedure url_set_interrupt_cb (interrupt_cb: TURLInterruptCB); - cdecl; external av__format; deprecated; - -(** - * returns the next registered protocol after the given protocol (the first if - * NULL is given), or NULL if protocol is the last one. - *) -function av_protocol_next(p: PURLProtocol): PURLProtocol; - cdecl; external av__format; - -(** - * Register the URLProtocol protocol. - * - * @param size the size of the URLProtocol struct referenced - *) -function av_register_protocol2(protocol: PURLProtocol; size: cint): cint; - cdecl; external av__format; deprecated; -(** - * @ - *) - -type - PByteIOContext = ^TByteIOContext; - TByteIOContext = TAVIOContext; { deprecated } - -function init_put_byte(s: PAVIOContext; - buffer: PByteArray; - buffer_size: cint; write_flag: cint; - opaque: pointer; - read_packet: TReadWriteFunc; - write_packet: TReadWriteFunc; - seek: TSeekFunc): cint; - cdecl; external av__format; deprecated; -function av_alloc_put_byte( - buffer: PByteArray; - buffer_size: cint; - write_flag: cint; - opaque: Pointer; - read_packet: TReadWriteFunc; - write_packet: TReadWriteFunc; - seek: TSeekFunc): PAVIOContext; - cdecl; external av__format; deprecated; - -(** - * @defgroup old_avio_funcs Old put_/get_*() functions - * The following functions are deprecated. Use the "avio_"-prefixed functions instead. - * @ - *) -function get_buffer(s: PAVIOContext; buf: PByteArray; size: cint): cint; - cdecl; external av__format; deprecated; -function get_partial_buffer(s: PAVIOContext; buf: PByteArray; size: cint): cint; - cdecl; external av__format; deprecated; -function get_byte(s: PAVIOContext): cint; - cdecl; external av__format; deprecated; -function get_le16(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_le24(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_le32(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_le64(s: PAVIOContext): cuint64; - cdecl; external av__format; deprecated; -function get_be16(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_be24(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_be32(s: PAVIOContext): cuint; - cdecl; external av__format; deprecated; -function get_be64(s: PAVIOContext): cuint64; - cdecl; external av__format; deprecated; - -procedure put_byte(s: PAVIOContext; b: cint); - cdecl; external av__format; deprecated; -procedure put_nbyte(s: PAVIOContext; b: cint; count: cint); - cdecl; external av__format; deprecated; -procedure put_buffer (s: PAVIOContext; buf: {const} PByteArray; size: cint); - cdecl; external av__format; deprecated; -procedure put_le64(s: PAVIOContext; val: cuint64); - cdecl; external av__format; deprecated; -procedure put_be64(s: PAVIOContext; val: cuint64); - cdecl; external av__format; deprecated; -procedure put_le32(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_be32(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_le24(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_be24(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_le16(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_be16(s: PAVIOContext; val: cuint); - cdecl; external av__format; deprecated; -procedure put_tag(s: PAVIOContext; tag: {const} PAnsiChar); - cdecl; external av__format; deprecated; -(** - * @ - *) - -function av_url_read_fpause(h: PAVIOContext; pause: cint): cint; - cdecl; external av__format; deprecated; -function av_url_read_fseek(h: PAVIOContext; stream_index: cint; - timestamp: cint64; flags: cint): cint64; - cdecl; external av__format; deprecated; - -(** - * @defgroup old_url_f_funcs Old url_f* functions - * @deprecated, use the "avio_"-prefixed functions instead. - * @ - *) -function url_fopen(var s: PAVIOContext; url: {const} PAnsiChar; flags: cint): cint; - cdecl; external av__format; deprecated; -function url_fclose(s: PAVIOContext): cint; - cdecl; external av__format; deprecated; -function url_fseek(s: PAVIOContext; offset: cint64; whence: cint): cint64; - cdecl; external av__format; deprecated; -function url_fskip(s: PAVIOContext; offset: cint64): cint; - cdecl; external av__format; deprecated; -function url_ftell(s: PAVIOContext): cint64; - cdecl; external av__format; deprecated; -function url_fsize(s: PAVIOContext): cint64; - cdecl; external av__format; deprecated; -const - URL_EOF = -1; -(** @note return URL_EOF (-1) if EOF *) -function url_fgetc(s: PAVIOContext): cint; - cdecl; external av__format; deprecated; -function url_setbufsize (s: PAVIOContext; buf_size: cint): cint; - cdecl; external av__format; deprecated; -function url_fprintf(s: PAVIOContext; fmt: {const} PAnsiChar; args: array of const): cint; - cdecl; external av__format; deprecated; -procedure put_flush_packet (s: PAVIOContext); - cdecl; external av__format; deprecated; -function url_open_dyn_buf(var s: PAVIOContext): cint; - cdecl; external av__format; deprecated; -function url_open_dyn_packet_buf(var s: PAVIOContext; max_packet_size: cint): cint; - cdecl; external av__format; deprecated; -function url_close_dyn_buf(s: PAVIOContext; pbuffer:PPointer): cint; - cdecl; external av__format; deprecated; -function url_fdopen (var s: PAVIOContext; h: PURLContext): cint; - cdecl; external av__format; deprecated; -(** - * @ - *) - -function url_ferror(s: PAVIOContext): cint; - cdecl; external av__format; deprecated; - -function udp_set_remote_url(h: PURLContext; uri: {const} PAnsiChar): cint; - cdecl; external av__format; deprecated; -function udp_get_local_port(h: PURLContext): cint; - cdecl; external av__format; deprecated; - -type - Tupdate_checksum = function (c: culong; p: Pcuint8; len: cuint): culong; cdecl; -procedure init_checksum(s: PAVIOContext; - update_checksum: Tupdate_checksum; - checksum: culong); - cdecl; external av__format; deprecated; -function get_checksum(s: PAVIOContext): culong; - cdecl; external av__format; deprecated; -procedure put_strz(s: PAVIOContext; buf: {const} PAnsiChar); - cdecl; external av__format; deprecated; -(** @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: PAVIOContext; buf: PAnsiChar; buf_size: cint): PAnsiChar; - cdecl; external av__format; deprecated; -(** - * @deprecated use avio_get_str instead - *) -function get_strz(s: PAVIOContext; buf: PAnsiChar; maxlen: cint): PAnsiChar; - cdecl; external av__format; deprecated; -(** - * @deprecated Use AVIOContext.seekable field directly. - *) -function url_is_streamed(s: PAVIOContext): cint; {$IFDEF HasInline}inline;{$ENDIF} deprecated; - -function url_fileno(s: PAVIOContext): PURLContext; - cdecl; external av__format; deprecated; - -(** - * @deprecated use AVIOContext.max_packet_size directly. - *) -function url_fget_max_packet_size (s: PAVIOContext): cint; - cdecl; external av__format; deprecated; - -function url_open_buf(var s: PAVIOContext; buf: PAnsiChar; buf_size: cint; flags: cint): cint; - cdecl; external av__format; deprecated; - -(** return the written or read size *) -function url_close_buf(s: PAVIOContext): cint; - cdecl; external av__format; deprecated; - -(** - * Return a non-zero value if the resource indicated by url - * exists, 0 otherwise. - * @deprecated Use avio_check instead. - *) -function url_exist(url: {const} PAnsiChar): cint; - cdecl; external av__format; deprecated; -{$ENDIF} // FF_API_OLD_AVIO - -(** - * Return AVIO_* access flags corresponding to the access permissions - * of the resource in url, or a negative value corresponding to an - * AVERROR code in case of failure. The returned access flags are - * masked by the value in flags. - * - * @note This function is intrinsically unsafe, in the sense that the - * checked resource may change its existence or permission status from - * one call to another. Thus you should not trust the returned value, - * unless you are sure that no other processes are accessing the - * checked resource. - * - * @note This function is slightly broken until next major bump - * because of AVIO_RDONLY == 0. Don't use it until then. - *) -function avio_check(url: {const} PAnsiChar; flags: cint): cint; - cdecl; external av__format; - -(** - * The callback is called in blocking functions to test regulary if - * asynchronous interruption is needed. AVERROR_EXIT is returned - * in this case by the interrupted function. 'NULL' means no interrupt - * callback is given. - *) -procedure avio_set_interrupt_cb(interrupt_cb: Pointer); - cdecl; external av__format; - -{$IF FF_API_REGISTER_PROTOCOL} -{ -var - first_protocol: PURLProtocol; cvar; external av__format; -} -{$IFEND} - -{$IF FF_API_REGISTER_PROTOCOL} -(** - * @deprecated Use av_register_protocol() instead. - *) -function register_protocol(protocol: PURLProtocol): cint; - cdecl; external av__format; deprecated; - -(** - * @deprecated Use av_register_protocol2() instead. - *) -function av_register_protocol(protocol: PURLProtocol): cint; - cdecl; external av__format; deprecated; -{$ENDIF} - -(** - * 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. - * The buffer must be allocated with av_malloc() and friends. - * @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. - *) -function avio_alloc_context( - buffer: PAnsiChar; - buffer_size: cint; - write_flag: cint; - opaque: Pointer; - read_packet: TReadWriteFunc; - write_packet: TReadWriteFunc; - seek: TSeekFunc): PAVIOContext; - cdecl; external av__format; - -procedure avio_w8(s: PAVIOContext; b: cint); - cdecl; external av__format; -procedure avio_write(s: PAVIOContext; buf: {const} PAnsiChar; size: cint); - cdecl; external av__format; -procedure avio_wl64(s: PAVIOContext; val: cuint64); - cdecl; external av__format; -procedure avio_wb64(s: PAVIOContext; val: cuint64); - cdecl; external av__format; -procedure avio_wl32(s: PAVIOContext; val: cuint); - cdecl; external av__format; -procedure avio_wb32(s: PAVIOContext; val: cuint); - cdecl; external av__format; -procedure avio_wl24(s: PAVIOContext; val: cuint); - cdecl; external av__format; -procedure avio_wb24(s: PAVIOContext; val: cuint); - cdecl; external av__format; -procedure avio_wl16(s: PAVIOContext; val: cuint); - cdecl; external av__format; -procedure avio_wb16(s: PAVIOContext; val: cuint); - cdecl; external av__format; - -(** - * Write a NULL-terminated string. - * @return number of bytes written. - *) -function avio_put_str(s: PAVIOContext; str: {const} PAnsiChar): cint; - cdecl; external av__format; - -(** - * Convert an UTF-8 string to UTF-16LE and write it. - * @return number of bytes written. - *) -function avio_put_str16le(s: PAVIOContext; str: {const} PAnsiChar): cint; - cdecl; external av__format; - -const - (** - * 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; - - (** - * 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. - *) - AVSEEK_FORCE = $20000; - -(** - * fseek() equivalent for AVIOContext. - * @return new position or AVERROR. - *) -function avio_seek(s: PAVIOContext; offset: cint64; whence: cint): cint64; - cdecl; external av__format; - -(** - * Skip given number of bytes forward - * @return new position or AVERROR. - *) -function avio_skip(s: PAVIOContext; offset: cint64): cint64; - cdecl; external av__format; - -(** - * ftell() equivalent for AVIOContext. - * @return position or AVERROR. - *) -function avio_tell(s: PAVIOContext): cint64; {$IFDEF HasInline}inline;{$ENDIF} - -(** - * Get the filesize. - * @return filesize or AVERROR - *) -function avio_size(s: PAVIOContext): cint64; - cdecl; external av__format; - -(** - * feof() equivalent for AVIOContext. - * @return non zero if and only if end of file - *) -function url_feof(s: PAVIOContext): cint; - cdecl; external av__format; - -(** @warning currently size is limited *) -function avio_printf(s: PAVIOContext; fmt: {const} PAnsiChar; args: array of const): cint; - cdecl; external av__format; - -procedure avio_flush(s: PAVIOContext); - cdecl; external av__format; - -(** - * Read size bytes from AVIOContext into buf. - * @return number of bytes read or AVERROR - *) -function avio_read(s: PAVIOContext; buf: Pbyte; size: cint): cint; - cdecl; external av__format; - -(** - * @defgroup avio_read Functions for reading from AVIOContext - * @ - * - * @note return 0 if EOF, so you cannot use it if EOF handling is - * necessary - *) -function avio_r8(s: PAVIOContext): cint; - cdecl; external av__format; - -function avio_rl16(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rl24(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rl32(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rl64(s: PAVIOContext): cuint64; - cdecl; external av__format; - -function avio_rb16(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rb24(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rb32(s: PAVIOContext): cuint; - cdecl; external av__format; - -function avio_rb64(s: PAVIOContext): cuint64; - cdecl; external av__format; - -(** - * @ - *) -(** - * 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. - *) -function avio_get_str(pb: PAVIOContext; maxlen: cint; buf: PAnsiChar; buflen: cint): cint; - cdecl; external av__format; - -(** - * 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) - *) -function avio_get_str16le(pb: PAVIOContext; maxlen: cint; buf: PAnsiChar; buflen: cint): cint; - cdecl; external av__format; - -function avio_get_str16be(pb: PAVIOContext; maxlen: cint; buf: PAnsiChar; buflen: cint): cint; - cdecl; external av__format; - -{$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. *) -function url_resetbuf(s: PAVIOContext; flags: cint): cint; - cdecl; external av__format; -{$ENDIF} - -(** - * @defgroup open_modes URL open modes - * The flags argument to avio_open must be one of the following - * constants, optionally ORed with other flags. - * @ - *) - -const -{$IF LIBAVFORMAT_VERSION_MAJOR < 53} - AVIO_RDONLY = 0; (**< read-only *) - AVIO_WRONLY = 1; (**< write-only *) - AVIO_RDWR = 2; (**< read-write *) -{$ELSE} - AVIO_RDONLY = 1; (**< read-only *) - AVIO_WRONLY = 2; (**< write-only *) - AVIO_RDWR = 4; (**< read-write *) -{$ENDIF} -(** - * @ - *) - -(** - * 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. - *) -const -{$IF LIBAVFORMAT_VERSION_MAJOR < 53} - AVIO_FLAG_NONBLOCK = 4; -{$ELSE} - AVIO_FLAG_NONBLOCK = 8; -{$ENDIF} - -(** - * Create and initialize a AVIOContext for accessing the - * resource indicated by url. - * @note When the resource indicated by url has been opened in - * read+write mode, the AVIOContext can be used only for writing. - * - * @param s Used to return the pointer to the created AVIOContext. - * In case of failure the pointed to value is set to NULL. - * @param flags flags which control how the resource indicated by url - * is to be opened - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code in case of failure - *) -function avio_open(var s: PAVIOContext; url: {const} PAnsiChar; flags: cint): cint; - cdecl; external av__format; - -(** - * Close the resource accessed by the AVIOContext s and free it. - * This function can only be used if s was opened by avio_open(). - * - * @return 0 on success, an AVERROR < 0 on error. - *) -function avio_close(s: PAVIOContext): cint; - cdecl; external av__format; - -(** - * Open a write only memory stream. - * - * @param s new IO context - * @return zero if no error. - *) -function avio_open_dyn_buf(var s: PAVIOContext): cint; - cdecl; external av__format; - -(** - * Return the written size and a pointer to the buffer. The buffer - * must be freed with av_free(). - * Padding of FF_INPUT_BUFFER_PADDING_SIZE is added to the buffer. - * - * @param s IO context - * @param pbuffer pointer to a byte buffer - * @return the length of the byte buffer - *) -function avio_close_dyn_buf(s: PAVIOContext; var pbuffer: Pcuint8): cint; - cdecl; external av__format; - -{$IF FF_API_UDP_GET_FILE} -function udp_get_file_handle(h: PURLContext): cint; - cdecl; external av__format; -{$ENDIF} - -(** - * Iterate through names of available protocols. - * @note it is recommanded to use av_protocol_next() instead of this - * - * @param opaque A private pointer representing current protocol. - * It must be a pointer to NULL on first iteration and will - * be updated by successive calls to avio_enum_protocols. - * @param output If set to 1, iterate over output protocols, - * otherwise over input protocols. - * - * @return A static string containing the name of current protocol or NULL - *) -function avio_enum_protocols(var opaque: Pointer; output: cint): {const} PAnsiChar; - cdecl; external av__format; - -(** - * Pause and resume playing - only meaningful if using a network streaming - * protocol (e.g. MMS). - * @param pause 1 for pause, 0 for resume - *) -function avio_pause(h: PAVIOContext; pause: cint): cint; - cdecl; external av__format; - -(** - * Seek to a given timestamp relative to some component stream. - * Only meaningful if using a network streaming protocol (e.g. MMS.). - * @param stream_index The stream index that the timestamp is relative to. - * If stream_index is (-1) the timestamp should be in AV_TIME_BASE - * units from the beginning of the presentation. - * If a stream_index >= 0 is used and the protocol does not support - * seeking based on component streams, the call will fail with ENOTSUP. - * @param timestamp timestamp in AVStream.time_base units - * or if there is no stream specified then in AV_TIME_BASE units. - * @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE - * and AVSEEK_FLAG_ANY. The protocol may silently ignore - * AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will - * fail with ENOTSUP if used and not supported. - * @return >= 0 on success - * @see AVInputFormat: : read_seek - *) -function avio_seek_time(h: PAVIOContext; stream_index: cint; - timestamp: cint64; flags: cint): cint64; - cdecl; external av__format; - -implementation - -{$IF (LIBAVFORMAT_VERSION_MAJOR < 54)} -function url_is_streamed(s: PAVIOContext): cint; -begin - Result := s^.is_streamed; -end; -{$ENDIF} - -function avio_tell(s: PAVIOContext): cint64; {$IFDEF HasInline}inline;{$ENDIF} -begin - Result := avio_seek(s, 0, SEEK_CUR); -end; - -end. |