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authorjaybinks <jaybinks@b956fd51-792f-4845-bead-9b4dfca2ff2c>2007-09-05 12:02:06 +0000
committerjaybinks <jaybinks@b956fd51-792f-4845-bead-9b4dfca2ff2c>2007-09-05 12:02:06 +0000
commit30343a531999b5e50673ee1731f1c54cbc008dfd (patch)
treeac7bd5051ad29aa13fe5a854d553b49ececcd4a8 /Game/Code/lib/ffmpeg/avformat.pas
parentfee5e834a23f11ea42365b9c5f7336b9c5c58bc0 (diff)
downloadusdx-30343a531999b5e50673ee1731f1c54cbc008dfd.tar.gz
usdx-30343a531999b5e50673ee1731f1c54cbc008dfd.tar.xz
usdx-30343a531999b5e50673ee1731f1c54cbc008dfd.zip
added 3rd party dependencies ( except Jedi-SDL )
modified DPR to statically include all files needed (using relative paths) this means 3rd party components should not need installation in the IDE, or adding to search paths. git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@368 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to 'Game/Code/lib/ffmpeg/avformat.pas')
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diff --git a/Game/Code/lib/ffmpeg/avformat.pas b/Game/Code/lib/ffmpeg/avformat.pas
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+ (*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *)
+unit avformat;
+
+interface
+
+uses
+ windows, avcodec, avio, rational, avutil;
+
+const
+ av__format = 'avformat-50.dll';
+
+ LIBAVUTIL_VERSION_INT = ((49 shl 16) + (0 shl 8) + 1);
+ LIBAVUTIL_VERSION = '49.0.1';
+ LIBAVUTIL_BUILD = LIBAVUTIL_VERSION_INT;
+
+ MAXINT64 = $7fffffffffffffff;
+ MININT64 = $8000000000000000;
+
+ PKT_FLAG_KEY = $0001;
+
+ (* AVImageFormat.flags field constants *)
+ AVIMAGE_INTERLEAVED = $0001; (* image format support interleaved output *)
+ MAX_STREAMS = 20;
+type
+ int = integer;
+
+ PAVPacket = ^TAVPacket;
+ PAVImageFormat = ^TAVImageFormat;
+ PAVFormatContext = ^TAVFormatContext;
+ PAVFormatParameters = ^TAVFormatParameters;
+ PAVOutputFormat = ^TAVOutputFormat;
+ PAVProbeData = ^TAVProbeData;
+ PAVInputFormat = ^TAVInputFormat;
+ PAVIndexEntry = ^TAVIndexEntry;
+ PAVStream = ^TAVStream;
+ PAVPacketList = ^TAVPacketList;
+ PAVImageInfo = ^TAVImageInfo;
+
+ TAVPacket = record {56}
+ pts: int64; ///< presentation time stamp in time_base units
+ dts: int64; ///< decompression time stamp in time_base units
+ data: PByte;
+ size: integer;
+ stream_index: integer;
+ flags: integer;
+ duration: integer; ///< presentation duration in time_base units (0 if not available)
+ destruct: procedure (p: PAVPacket);
+ priv: pointer;
+ pos: int64; ///< byte position in stream, -1 if unknown
+ end;
+
+(*************************************************)
+(* fractional numbers for exact pts handling *)
+
+(* the exact value of the fractional number is: 'val + num / den'. num
+ is assumed to be such as 0 <= num < den *)
+ PAVFrac = ^TAVFrac;
+ TAVFrac = record
+ val, num, den: int64;
+ end;
+
+(*************************************************)
+(* input/output formats *)
+
+(* this structure contains the data a format has to probe a file *)
+ TAVProbeData = record {12}
+ filename: pchar;
+ buf: pchar;
+ buf_size: integer;
+ end;
+
+ TAVFormatParameters = record {56}
+ time_base: TAVRational; (* 8 bytes *)
+ sample_rate: integer;
+ channels: integer;
+ width: integer;
+ height: integer;
+ pix_fmt: TAVPixelFormat;
+ image_format: PAVImageFormat; (* 4 bytes *)
+ channel: integer; (* used to select dv channel *)
+ device: pchar; (* video, audio or DV device *)
+ standard: pchar; (* tv standard, NTSC, PAL, SECAM *)
+// int mpeg2ts_raw:1; (* force raw MPEG2 transport stream output, if possible *)
+// int mpeg2ts_compute_pcr:1; (* compute exact PCR for each transport
+// stream packet (only meaningful if
+// mpeg2ts_raw is TRUE *)
+// int initial_pause:1; (* do not begin to play the stream
+// immediately (RTSP only) *)
+ dummy: byte;
+ video_codec_id: TCodecID;
+ audio_codec_id: TCodecID;
+ end;
+
+ TAVOutputFormat = record {56}
+ name: pchar;
+ long_name: pchar;
+ mime_type: pchar;
+ extensions: pchar; (* comma separated extensions *)
+ (* size of private data so that it can be allocated in the wrapper *)
+ priv_data_size: integer;
+ (* output support *)
+ audio_codec: TCodecID; (* default audio codec *)
+ video_codec: TCodecID; (* default video codec *)
+ write_header: function (c: PAVFormatContext): integer; cdecl;
+ write_packet: function (c: PAVFormatContext; pkt: PAVPacket): integer; cdecl;
+ write_trailer: function (c: PAVFormatContext): integer; cdecl;
+ (* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER *)
+ flags: integer;
+ (* currently only used to set pixel format if not YUV420P *)
+ set_parameters: function (c: PAVFormatContext; f: PAVFormatParameters): integer; cdecl;
+ interleave_packet: function (s: PAVFormatContext; _out: PAVPacket; _in: PAVPacket; flush: integer): integer; cdecl;
+ (* private fields *)
+ next: PAVOutputFormat;
+ end;
+
+ TAVInputFormat = record {60}
+ name: pchar;
+ long_name: pchar;
+ (* size of private data so that it can be allocated in the wrapper *)
+ priv_data_size: integer;
+ (* tell if a given file has a chance of being parsing by this format *)
+ read_probe: function (p: PAVProbeData): integer; cdecl;
+ (* read the format header and initialize the AVFormatContext
+ structure. Return 0 if OK. 'ap' if non NULL contains
+ additionnal paramters. Only used in raw format right
+ now. 'av_new_stream' should be called to create new streams. *)
+ read_header: function (c: PAVFormatContext; ap: PAVFormatParameters): integer; cdecl;
+ (* read one packet and put it in 'pkt'. pts and flags are also
+ set. 'av_new_stream' can be called only if the flag
+ AVFMTCTX_NOHEADER is used. *)
+ read_packet: function (c: PAVFormatContext; pkt: PAVPacket): integer; cdecl;
+ (* close the stream. The AVFormatContext and AVStreams are not
+ freed by this function *)
+ read_close: function (c: PAVFormatContext): integer; cdecl;
+ (*** seek to a given timestamp relative to the frames in
+ * stream component stream_index
+ * @param stream_index must not be -1
+ * @param flags selects which direction should be preferred if no exact
+ * match is available *)
+ read_seek: function (c: PAVFormatContext; stream_index: integer;
+ timestamp: int64; flags: integer): integer; cdecl;
+ (*** gets the next timestamp in AV_TIME_BASE units. *)
+ read_timestamp: function (s: PAVFormatContext; stream_index: integer;
+ pos: pint64; pos_limit: int64): integer; cdecl;
+ (* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER *)
+ flags: integer;
+ (* if extensions are defined, then no probe is done. You should
+ usually not use extension format guessing because it is not
+ reliable enough *)
+ extensions: pchar;
+ (* general purpose read only value that the format can use *)
+ value: integer;
+
+ (* start/resume playing - only meaningful if using a network based format (RTSP) *)
+ read_play: function (c: PAVFormatContext): integer; cdecl;
+
+ (* pause playing - only meaningful if using a network based format (RTSP) *)
+ read_pause: function (c: PAVFormatContext): integer; cdecl;
+
+ (* private fields *)
+ next: PAVInputFormat;
+ end;
+
+ TAVIndexEntry = record {24}
+ pos: int64;
+ timestamp: int64;
+(* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed *)
+ flags: integer;
+ min_distance: integer; (* min distance between this and the previous keyframe, used to avoid unneeded searching *)
+ end;
+
+ TAVStream = record {168}
+ index: integer; (* stream index in AVFormatContext *)
+ id: integer; (* format specific stream id *)
+ codec: PAVCodecContext; (* codec context *)
+ (*** real base frame rate of the stream.
+ * for example if the timebase is 1/90000 and all frames have either
+ * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1 *)
+ r_frame_rate: TAVRational;
+ priv_data: pointer;
+ (* internal data used in av_find_stream_info() *)
+ codec_info_duration: int64;
+ codec_info_nb_frames: integer;
+ (* encoding: PTS generation when outputing stream *)
+ pts: TAVFrac;
+
+ (*** this is the fundamental unit of time (in seconds) in terms
+ * of which frame timestamps are represented. for fixed-fps content,
+ * timebase should be 1/framerate and timestamp increments should be
+ * identically 1. *)
+ time_base: TAVRational;
+ pts_wrap_bits: integer; (* number of bits in pts (used for wrapping control) *)
+ (* ffmpeg.c private use *)
+ stream_copy: integer; (* if TRUE, just copy stream *)
+ discard: TAVDiscard; ///< selects which packets can be discarded at will and dont need to be demuxed
+ //FIXME move stuff to a flags field?
+ (* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
+ * MN:dunno if thats the right place, for it *)
+ quality: single;
+ (* decoding: position of the first frame of the component, in AV_TIME_BASE fractional seconds. *)
+ start_time: int64;
+ (* decoding: duration of the stream, in AV_TIME_BASE fractional seconds. *)
+ duration: int64;
+
+ language: array [0..3] of char; (* ISO 639 3-letter language code (empty string if undefined) *)
+
+ (* av_read_frame() support *)
+ need_parsing: integer; ///< 1->full parsing needed, 2->only parse headers dont repack
+ parser: PAVCodecParserContext;
+
+ cur_dts: int64;
+ last_IP_duration: integer;
+ last_IP_pts: int64;
+ (* av_seek_frame() support *)
+ index_entries: PAVIndexEntry; (* only used if the format does not support seeking natively *)
+ nb_index_entries: integer;
+ index_entries_allocated_size: integer;
+
+ nb_frames: int64; ///< number of frames in this stream if known or 0
+ pts_buffer: array [0..4] of int64;
+ end;
+
+(* format I/O context *)
+ TAVFormatContext = record {3960}
+ av_class: PAVClass; (* set by av_alloc_format_context *)
+ (* can only be iformat or oformat, not both at the same time *)
+ iformat: PAVInputFormat;
+ oformat: PAVOutputFormat;
+ priv_data: pointer;
+ pb: TByteIOContext;
+ nb_streams: integer;
+ streams: array [0..MAX_STREAMS - 1] of PAVStream;
+ filename: array [0..1023] of char; (* input or output filename *)
+ (* stream info *)
+ timestamp: int64;
+ title: array [0..511] of char;
+ author: array [0..511] of char;
+ copyright: array [0..511] of char;
+ comment: array [0..511] of char;
+ album: array [0..511] of char;
+ year: integer; (* ID3 year, 0 if none *)
+ track: integer; (* track number, 0 if none *)
+ genre: array [0..31] of char; (* ID3 genre *)
+
+ ctx_flags: integer; (* format specific flags, see AVFMTCTX_xx *)
+ (* private data for pts handling (do not modify directly) *)
+ (* This buffer is only needed when packets were already buffered but
+ not decoded, for example to get the codec parameters in mpeg
+ streams *)
+ packet_buffer: PAVPacketList;
+
+ (* decoding: position of the first frame of the component, in
+ AV_TIME_BASE fractional seconds. NEVER set this value directly:
+ it is deduced from the AVStream values. *)
+ start_time: int64;
+ (* decoding: duration of the stream, in AV_TIME_BASE fractional
+ seconds. NEVER set this value directly: it is deduced from the
+ AVStream values. *)
+ duration: int64;
+ (* decoding: total file size. 0 if unknown *)
+ file_size: int64;
+ (* decoding: total stream bitrate in bit/s, 0 if not
+ available. Never set it directly if the file_size and the
+ duration are known as ffmpeg can compute it automatically. *)
+ bit_rate: integer;
+
+ (* av_read_frame() support *)
+ cur_st: PAVStream;
+ cur_ptr: pchar;
+ cur_len: integer;
+ cur_pkt: TAVPacket;
+
+ (* av_seek_frame() support *)
+ data_offset: int64; (* offset of the first packet *)
+ index_built: integer;
+
+ mux_rate: integer;
+ packet_size: integer;
+ preload: integer;
+ max_delay: integer;
+
+ (* number of times to loop output in formats that support it *)
+ loop_output: integer;
+
+ flags: integer;
+ loop_input: integer;
+ (* decoding: size of data to probe; encoding unused *)
+ probesize: cardinal;
+ end;
+
+ TAVPacketList = record {64}
+ pkt: TAVPacket;
+ next: PAVPacketList;
+ end;
+
+(* still image support *)
+ PAVInputImageContext = pointer; // attribute_deprecated;
+// PAVInputImageContext = pointer; //AVInputImageContext attribute_deprecated;
+
+(* still image support *)
+ TAVImageInfo = record {48}
+ pix_fmt: TAVPixelFormat; (* requested pixel format *)
+ width: integer; (* requested width *)
+ height: integer; (* requested height *)
+ interleaved: integer; (* image is interleaved (e.g. interleaved GIF) *)
+ pict: TAVPicture; (* returned allocated image *)
+ end;
+
+ TAVImageFormat = record {32}
+ name: pchar;
+ extensions: pchar;
+ (* tell if a given file has a chance of being parsing by this format *)
+ img_probe: function (d: PAVProbeData): integer; cdecl;
+ (* read a whole image. 'alloc_cb' is called when the image size is
+ known so that the caller can allocate the image. If 'allo_cb'
+ returns non zero, then the parsing is aborted. Return '0' if
+ OK. *)
+ img_read: function (b: PByteIOContext; alloc_cb: pointer; ptr: pointer): integer; cdecl;
+ (* write the image *)
+ supported_pixel_formats: integer; (* mask of supported formats for output *)
+ img_write: function (b: PByteIOContext; i: PAVImageInfo): integer; cdecl;
+ flags: integer;
+ next: PAVImageFormat;
+ end;
+
+procedure av_destruct_packet_nofree (pkt: PAVPacket);
+ cdecl; external av__format;
+procedure av_destruct_packet (pkt: PAVPacket);
+ cdecl; external av__format;
+
+(* initialize optional fields of a packet *)
+procedure av_init_packet (pkt: PAVPacket);
+
+function av_new_packet(pkt: PAVPacket; size: integer): integer;
+ cdecl; external av__format;
+
+function av_get_packet (s: PByteIOContext; pkt: PAVPacket; size: integer): integer;
+ cdecl; external av__format;
+
+function av_dup_packet (pkt: PAVPacket): integer;
+ cdecl; external av__format;
+
+(** * Free a packet
+ *
+ * @param pkt packet to free *)
+procedure av_free_packet (pkt: PAVPacket);
+
+procedure av_register_image_format (img_fmt: PAVImageFormat);
+ cdecl; external av__format;
+
+function av_probe_image_format (pd: PAVProbeData): PAVImageFormat;
+ cdecl; external av__format;
+
+function guess_image_format (filename: pchar): PAVImageFormat;
+ cdecl; external av__format;
+
+function av_guess_image2_codec(filename: pchar): TCodecID;
+ cdecl; external av__format;
+
+function av_read_image (pb: PByteIOContext; filename: pchar;
+ fmt: PAVImageFormat;
+ alloc_cb: pointer; opaque: pointer): integer;
+ cdecl; external av__format;
+
+function av_write_image(pb: PByteIOContext; fmt: PAVImageFormat; img: PAVImageInfo): integer;
+ cdecl; external av__format;
+
+(* XXX: use automatic init with either ELF sections or C file parser *)
+(* modules *)
+
+//#include "rtp.h"
+
+//#include "rtsp.h"
+
+(* utils.c *)
+ procedure av_register_input_format (format: PAVInputFormat);
+ cdecl; external av__format;
+
+ procedure av_register_output_format (format: PAVOutputFormat);
+ cdecl; external av__format;
+
+ function guess_stream_format (short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat;
+ cdecl; external av__format;
+
+ function guess_format(short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat;
+ cdecl; external av__format;
+
+ function av_guess_codec(fmt: PAVOutputFormat; short_name: pchar;
+ filename: pchar; mime_type: pchar; _type: TCodecType): TCodecID;
+ cdecl; external av__format;
+
+ procedure av_hex_dump (f: HFILE; buf: pchar; size: integer);
+ cdecl; external av__format;
+ procedure av_pkt_dump(f: HFILE; pkt: pAVPacket; dump_payload: integer);
+ cdecl; external av__format;
+
+ procedure av_register_all ();
+ cdecl; external av__format;
+
+
+(* media file input *)
+ function av_find_input_format (short_name: pchar): PAVInputFormat;
+ cdecl; external av__format;
+ function av_probe_input_format (pd: PAVProbeData; is_opened: integer): PAVInputFormat;
+ cdecl; external av__format;
+ function av_open_input_stream (ic_ptr: PAVFormatContext;
+ pb: PByteIOContext; filename: pchar;
+ fmt: PAVInputFormat; ap: PAVFormatParameters): integer;
+ cdecl; external av__format;
+(*** Open a media file as input. The codec are not opened. Only the file
+ * header (if present) is read.
+ *
+ * @param ic_ptr the opened media file handle is put here
+ * @param filename filename to open.
+ * @param fmt if non NULL, force the file format to use
+ * @param buf_size optional buffer size (zero if default is OK)
+ * @param ap additionnal parameters needed when opening the file (NULL if default)
+ * @return 0 if OK. AVERROR_xxx otherwise. *)
+
+ function av_open_input_file (var ic_ptr: PAVFormatContext; filename: pchar;
+ fmt: PAVInputFormat; buf_size: integer;
+ ap: PAVFormatParameters): integer;
+ cdecl; external av__format;
+
+ (* no av_open for output, so applications will need this: *)
+ function av_alloc_format_context (): PAVFormatContext;
+ cdecl; external av__format;
+
+const
+ AVERROR_UNKNOWN =(-1); (* unknown error *)
+ AVERROR_IO =(-2); (* i/o error *)
+ AVERROR_NUMEXPECTED =(-3); (* number syntax expected in filename *)
+ AVERROR_INVALIDDATA =(-4); (* invalid data found *)
+ AVERROR_NOMEM =(-5); (* not enough memory *)
+ AVERROR_NOFMT =(-6); (* unknown format *)
+ AVERROR_NOTSUPP =(-7); (* operation not supported *)
+
+(*** Read the beginning of a media file to get stream information. This
+ * is useful for file formats with no headers such as MPEG. This
+ * function also compute the real frame rate in case of mpeg2 repeat
+ * frame mode.
+ *
+ * @param ic media file handle
+ * @return >=0 if OK. AVERROR_xxx if error.
+ * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need *)
+
+ function av_find_stream_info (ic: PAVFormatContext): integer;
+ cdecl; external av__format;
+ function av_read_packet (s: PAVFormatContext; pkt: PAVPacket): integer;
+ cdecl; external av__format;
+(*** Return the next frame of a stream.
+ *
+ * The returned packet is valid
+ * until the next av_read_frame() or until av_close_input_file() and
+ * must be freed with av_free_packet. For video, the packet contains
+ * exactly one frame. For audio, it contains an integer number of
+ * frames if each frame has a known fixed size (e.g. PCM or ADPCM
+ * data). If the audio frames have a variable size (e.g. MPEG audio),
+ * then it contains one frame.
+ *
+ * pkt->pts, pkt->dts and pkt->duration are always set to correct
+ * values in AV_TIME_BASE unit (and guessed if the format cannot
+ * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
+ * has B frames, so it is better to rely on pkt->dts if you do not
+ * decompress the payload.
+ *
+ * @return 0 if OK, < 0 if error or end of file. *)
+
+ function av_read_frame (s: PAVFormatContext; pkt: PAVPacket): integer;
+ cdecl; external av__format;
+ function av_seek_frame (s: PAVFormatContext; stream_index: integer; timestamp: int64; flags: integer): integer;
+ cdecl; external av__format;
+ function av_read_play (s: PAVFormatContext): integer;
+ cdecl; external av__format;
+ function av_read_pause (s: PAVFormatContext): integer;
+ cdecl; external av__format;
+ procedure av_close_input_file (s: PAVFormatContext);
+ cdecl; external av__format;
+ function av_new_stream (s: PAVFormatContext; id: integer): PAVStream;
+ cdecl; external av__format;
+ procedure av_set_pts_info (s: PAVStream; pts_wrap_bits: integer;
+ pts_num: integer; pts_den: integer);
+ cdecl; external av__format;
+
+const
+ AVSEEK_FLAG_BACKWARD =1; ///< seek backward
+ AVSEEK_FLAG_BYTE =2; ///< seeking based on position in bytes
+ AVSEEK_FLAG_ANY =4; ///< seek to any frame, even non keyframes
+
+ function av_find_default_stream_index (s: PAVFormatContext): integer;
+ cdecl; external av__format;
+ function av_index_search_timestamp (st: PAVStream; timestamp: int64; flags: integer): integer;
+ cdecl; external av__format;
+ function av_add_index_entry (st: PAVStream; pos: int64; timestamp: int64;
+ distance: integer; flags: integer): integer;
+ cdecl; external av__format;
+ function av_seek_frame_binary (s: PAVFormatContext; stream_index: integer;
+ target_ts: int64; flags: integer): integer;
+ cdecl; external av__format;
+
+ procedure av_update_cur_dts (s: PAVFormatContext; ref_st: PAVStream;
+ timestamp: int64);
+ cdecl; external av__format;
+
+(* media file output *)
+ function av_set_parameters (s: PAVFormatContext; ap: PAVFormatParameters): integer;
+ cdecl; external av__format;
+
+ function av_write_header (s: PAVFormatContext): integer;
+ cdecl; external av__format;
+
+ function av_write_frame(s: PAVFormatContext; pkt: PAVPacket): integer;
+ cdecl; external av__format;
+
+ function av_interleaved_write_frame (s: PAVFormatContext; pkt: PAVPacket): integer;
+ cdecl; external av__format;
+
+ function av_interleave_packet_per_dts(s: PAVFormatContext; _out: PAVPacket;
+ pkt: PAVPacket; flush: integer): integer;
+ cdecl; external av__format;
+ function av_write_trailer(s: pAVFormatContext): integer;
+ cdecl; external av__format;
+
+ procedure dump_format(ic: PAVFormatContext; index: integer; url: pchar;
+ is_output: integer);
+ cdecl; external av__format;
+
+ function parse_image_size(width_ptr: PInteger; height_ptr: PInteger; str: pchar): integer;
+ cdecl; external av__format;
+ function parse_frame_rate (frame_rate: PInteger; frame_rate_base: PInteger; arg: pchar): integer;
+ cdecl; external av__format;
+ function parse_date(datestr: pchar; duration: integer): int64;
+ cdecl; external av__format;
+ function av_gettime (): int64;
+ cdecl; external av__format;
+
+(* ffm specific for ffserver *)
+const
+ FFM_PACKET_SIZE = 4096;
+
+ function ffm_read_write_index (fd: integer): int64;
+ cdecl; external av__format;
+
+ procedure ffm_write_write_index(fd: integer; pos: int64);
+ cdecl; external av__format;
+
+ procedure ffm_set_write_index (s: PAVFormatContext; pos: int64; file_size: int64);
+ cdecl; external av__format;
+
+ function find_info_tag (arg: pchar; arg_size: integer; tag1: pchar; info: pchar): integer;
+ cdecl; external av__format;
+
+ function get_frame_filename(buf: pchar; buf_size: integer;
+ path: pchar; number: integer): integer;
+ cdecl; external av__format;
+ function filename_number_test (filename: pchar): integer;
+ cdecl; external av__format;
+
+
+(* grab specific *)
+ function video_grab_init (): integer;
+ cdecl; external av__format;
+ function audio_init (): integer;
+ cdecl; external av__format;
+
+(* DV1394 *)
+ function dv1394_init (): integer;
+ cdecl; external av__format;
+ function dc1394_init (): integer;
+ cdecl; external av__format;
+
+ function strstart(str: pchar; val: pchar; ptr: PPointer): integer;
+ cdecl; external av__format;
+ function stristart(str: pchar; val: pchar; ptr: PPointer): integer;
+ cdecl; external av__format;
+ procedure pstrcpy(buf: pchar; buf_size: integer; str: pchar);
+ cdecl; external av__format;
+ function pstrcat(buf: pchar; buf_size: integer; s: pchar): pchar;
+ cdecl; external av__format;
+
+ procedure __dynarray_add (tab_ptr: PPointer; nb_ptr: PInteger; elem: cardinal);
+ cdecl; external av__format;
+
+
+implementation
+
+procedure av_init_packet (pkt: PAVPacket);
+begin
+ pkt.pts := AV_NOPTS_VALUE;
+ pkt.dts := AV_NOPTS_VALUE;
+ pkt.pos := -1;
+ pkt.duration := 0;
+ pkt.flags := 0;
+ pkt.stream_index := 0;
+ pkt.destruct := @av_destruct_packet_nofree;
+end;
+
+procedure av_free_packet (pkt: PAVPacket);
+begin
+ if (pkt <> nil) and (@pkt^.destruct <> nil) then
+ pkt^.destruct (pkt);
+end;
+
+end.