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Diffstat (limited to 'src/lib/ffmpeg-0.7/avformat.pas')
| -rw-r--r-- | src/lib/ffmpeg-0.7/avformat.pas | 1748 |
1 files changed, 1748 insertions, 0 deletions
diff --git a/src/lib/ffmpeg-0.7/avformat.pas b/src/lib/ffmpeg-0.7/avformat.pas new file mode 100644 index 00000000..7c536b1b --- /dev/null +++ b/src/lib/ffmpeg-0.7/avformat.pas @@ -0,0 +1,1748 @@ +(* + * 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 version 0.7 libavformat/avformat.h + * Min. version: 52.110.0 + * Max. version: 52.111.0 + *) + +unit avformat; + +{$IFDEF FPC} + {$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} (* for the HasInline define *) + +{$IFDEF DARWIN} + {$linklib libavformat} +{$ENDIF} + +interface + +uses + ctypes, + avcodec, + avio, + avutil, + rational, + SysUtils, + UConfig; + +const + (* + * IMPORTANT: This headers are valid for all minor revisions of ffmpeg + * version 0.7x + * This file has been created with the previous ffmpeg headers as a basis + * by removing all unneeded conditionals. + *) + (* Max. supported version by this header *) + LIBAVFORMAT_MAX_VERSION_MAJOR = 52; + LIBAVFORMAT_MAX_VERSION_MINOR = 110; + LIBAVFORMAT_MAX_VERSION_RELEASE = 0; + LIBAVFORMAT_MAX_VERSION = (LIBAVFORMAT_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MAX_VERSION_RELEASE * VERSION_RELEASE); + + (* Min. supported version by this header *) + LIBAVFORMAT_MIN_VERSION_MAJOR = 52; + LIBAVFORMAT_MIN_VERSION_MINOR = 111; + LIBAVFORMAT_MIN_VERSION_RELEASE = 0; + LIBAVFORMAT_MIN_VERSION = (LIBAVFORMAT_MIN_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MIN_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MIN_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$IF (LIBAVFORMAT_VERSION < LIBAVFORMAT_MIN_VERSION)} + {$MESSAGE Error 'Linked version of libavformat is too old!'} +{$IFEND} + +(* Check if linked versions are supported *) +{$IF (LIBAVFORMAT_VERSION > LIBAVFORMAT_MAX_VERSION)} +// {$MESSAGE Error 'Linked version of libavformat is not yet supported!'} +{$IFEND} + +{ +const + LIBAVFORMAT_BUILD = LIBAVFORMAT_VERSION_INT; + LIBAVFORMAT_IDENT = 'Lavf' AV_STRINGIFY(LIBAVFORMAT_VERSION); +} + +(** + * Return the LIBAVFORMAT_VERSION_INT constant. + *) +function avformat_version(): cuint; + cdecl; external av__format; + +(** + * Return the libavformat build-time configuration. + *) +function avformat_configuration(): {const} PansiChar; + cdecl; external av__format; + +(** + * Return the libavformat license. + *) +function avformat_license(): {const} PansiChar; + cdecl; external av__format; + +type + PAVFile = Pointer; + +(* + * Public Metadata API. + * The metadata API allows libavformat to export metadata tags to a client + * application using a sequence of key/value pairs. Like all strings in FFmpeg, + * metadata must be stored as UTF-8 encoded Unicode. Note that metadata + * exported by demuxers isn't checked to be valid UTF-8 in most cases. + * Important concepts to keep in mind: + * 1. Keys are unique; there can never be 2 tags with the same key. This is + * also meant semantically, i.e., a demuxer should not knowingly produce + * several keys that are literally different but semantically identical. + * E.g., key=Author5, key=Author6. In this example, all authors must be + * placed in the same tag. + * 2. Metadata is flat, not hierarchical; there are no subtags. If you + * want to store, e.g., the email address of the child of producer Alice + * and actor Bob, that could have key=alice_and_bobs_childs_email_address. + * 3. Several modifiers can be applied to the tag name. This is done by + * appending a dash character ('-') and the modifier name in the order + * they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng. + * a) language -- a tag whose value is localized for a particular language + * is appended with the ISO 639-2/B 3-letter language code. + * For example: Author-ger=Michael, Author-eng=Mike + * The original/default language is in the unqualified "Author" tag. + * A demuxer should set a default if it sets any translated tag. + * b) sorting -- a modified version of a tag that should be used for + * sorting will have '-sort' appended. E.g. artist="The Beatles", + * artist-sort="Beatles, The". + * + * 4. Demuxers attempt to export metadata in a generic format, however tags + * with no generic equivalents are left as they are stored in the container. + * Follows a list of generic tag names: + * + * album -- name of the set this work belongs to + * album_artist -- main creator of the set/album, if different from artist. + * e.g. "Various Artists" for compilation albums. + * artist -- main creator of the work + * comment -- any additional description of the file. + * composer -- who composed the work, if different from artist. + * copyright -- name of copyright holder. + * creation_time-- date when the file was created, preferably in ISO 8601. + * date -- date when the work was created, preferably in ISO 8601. + * disc -- number of a subset, e.g. disc in a multi-disc collection. + * encoder -- name/settings of the software/hardware that produced the file. + * encoded_by -- person/group who created the file. + * filename -- original name of the file. + * genre -- <self-evident>. + * language -- main language in which the work is performed, preferably + * in ISO 639-2 format. Multiple languages can be specified by + * separating them with commas. + * performer -- artist who performed the work, if different from artist. + * E.g for "Also sprach Zarathustra", artist would be "Richard + * Strauss" and performer "London Philharmonic Orchestra". + * publisher -- name of the label/publisher. + * service_name -- name of the service in broadcasting (channel name). + * service_provider -- name of the service provider in broadcasting. + * title -- name of the work. + * track -- number of this work in the set, can be in form current/total. + * variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of + *) + +{$IF FF_API_OLD_METADATA2} +(** + * @defgroup old_metadata Old metadata API + * The following functions are deprecated, use + * their equivalents from libavutil/dict.h instead. + * @ + *) + +const +{ + AV_METADATA_MATCH_CASE = 1; + AV_METADATA_IGNORE_SUFFIX = 2; + AV_METADATA_DONT_STRDUP_KEY = 4; + AV_METADATA_DONT_STRDUP_VAL = 8; + AV_METADATA_DONT_OVERWRITE = 16; +} + AV_METADATA_MATCH_CASE = AV_DICT_MATCH_CASE; + AV_METADATA_IGNORE_SUFFIX = AV_DICT_IGNORE_SUFFIX; + AV_METADATA_DONT_STRDUP_KEY = AV_DICT_DONT_STRDUP_KEY; + AV_METADATA_DONT_STRDUP_VAL = AV_DICT_DONT_STRDUP_VAL; + AV_METADATA_DONT_OVERWRITE = AV_DICT_DONT_OVERWRITE; + +{ +typedef struct AVMetadataConv AVMetadataConv; +} +type + PAVMetadataTag = ^TAVMetadataTag; + TAVMetadataTag = record + key: PAnsiChar; + value: PAnsiChar; + end; + + PAVMetadata = Pointer; + PAVDictionary = PAVMetadata; + PAVDictionaryEntry = PAVMetadata; + +(** + * Get a metadata element with matching key. + * + * @param prev Set to the previous matching element to find the next. + * If set to NULL the first matching element is returned. + * @param flags Allows case as well as suffix-insensitive comparisons. + * @return Found tag or NULL, changing key or value leads to undefined behavior. + *) +function av_metadata_get(m: PAVDictionary; key: {const} PAnsiChar; + prev: {const} PAVDictionaryEntry; flags: cint): PAVDictionaryEntry; + cdecl; external av__format; + +{$IF FF_API_OLD_METADATA} +(** + * Set the given tag in *pm, overwriting an existing tag. + * + * @param pm pointer to a pointer to a metadata struct. If *pm is NULL + * a metadata struct is allocated and put in *pm. + * @param key tag key to add to *pm (will be av_strduped) + * @param value tag value to add to *pm (will be av_strduped) + * @return >= 0 on success otherwise an error code <0 + * @deprecated Use av_metadata_set2() instead. + *) +function av_metadata_set(var pm: PAVMetadata; key: {const} PAnsiChar; value: {const} PAnsiChar): cint; + cdecl; external av__format; deprecated; +{$ENDIF} + +(** + * Set the given tag in *pm, overwriting an existing tag. + * + * @param pm pointer to a pointer to a metadata struct. If *pm is NULL + * a metadata struct is allocated and put in *pm. + * @param key tag key to add to *pm (will be av_strduped depending on flags) + * @param value tag value to add to *pm (will be av_strduped depending on flags). + * Passing a NULL value will cause an existing tag to be deleted. + * @return >= 0 on success otherwise an error code <0 + *) +function av_metadata_set2(var pm: PAVDictionary; key: {const} PAnsiChar; value: {const} PAnsiChar; flags: cint): cint; + cdecl; external av__format; deprecated; + +(** + * Copy metadata from one AVDictionary struct into another. + * @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL, + * this function will allocate a struct for you and put it in *dst + * @param src pointer to source AVDictionary struct + * @param flags flags to use when setting metadata in *dst + * @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag + *) +procedure av_metadata_copy(var dst: PAVDictionary; src: PAVDictionary; flags: cint); + cdecl; external av__format; deprecated; + +(** + * Free all the memory allocated for an AVDictionary struct. + *) +procedure av_metadata_free(var m: PAVDictionary); + cdecl; external av__format; deprecated; + +{$ENDIF} + +(* packet functions *) + +const + PKT_FLAG_KEY = $0001; + +procedure av_destruct_packet_nofree(var pkt: TAVPacket); + cdecl; external av__format; + +(** + * Default packet destructor. + *) +procedure av_destruct_packet(var pkt: TAVPacket); + cdecl; external av__format; + +(** + * Initialize optional fields of a packet with default values. + * + * @param pkt packet + *) +procedure av_init_packet(var pkt: TAVPacket); + cdecl; external av__format; + +(** + * Allocate the payload of a packet and initialize its fields with + * default values. + * + * @param pkt packet + * @param size wanted payload size + * @return 0 if OK, AVERROR_xxx otherwise + *) +function av_new_packet(var pkt: TAVPacket; size: cint): cint; + cdecl; external av__format; + +(** + * Allocate and read the payload of a packet and initialize its fields with + * default values. + * + * @param pkt packet + * @param size desired payload size + * @return >0 (read size) if OK, AVERROR_xxx otherwise + *) +function av_get_packet(s: PByteIOContext; var pkt: TAVPacket; size: cint): cint; + cdecl; external av__format; + +(*************************************************) +(* fractional numbers for exact pts handling *) + +type + (** + * The exact value of the fractional number is: 'val + num / den'. + * num is assumed to be 0 <= num < den. + *) + PAVFrac = ^TAVFrac; + TAVFrac = record + val, num, den: cint64; + end; + +(*************************************************) +(* input/output formats *) + +type + (** + * This structure contains the data a format has to probe a file. + *) + TAVProbeData = record + filename: PAnsiChar; + buf: PByteArray; (**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. *) + buf_size: cint; (**< Size of buf except extra allocated bytes *) + end; + +const + AVPROBE_SCORE_MAX = 100; ///< Maximum score, half of that is used for file-extension-based detection + AVPROBE_PADDING_SIZE = 32; ///< extra allocated bytes at the end of the probe buffer + + //! Demuxer will use url_fopen, no opened file should be provided by the caller. + AVFMT_NOFILE = $0001; + AVFMT_NEEDNUMBER = $0002; (**< Needs '%d' in filename. *) + AVFMT_SHOW_IDS = $0008; (**< Show format stream IDs numbers. *) + AVFMT_RAWPICTURE = $0020; (**< Format wants AVPicture structure for + raw picture data. *) + AVFMT_GLOBALHEADER = $0040; (**< Format wants global header. *) + AVFMT_NOTIMESTAMPS = $0080; (**< Format does not need / have any timestamps. *) + AVFMT_GENERIC_INDEX = $0100; (**< Use generic index building code. *) + AVFMT_TS_DISCONT = $0200; (**< Format allows timestamp discontinuities. *) + AVFMT_VARIABLE_FPS = $0400; (**< Format allows variable fps. *) + AVFMT_NODIMENSIONS = $0800; (**< Format does not need width/height *) + + // used by AVIndexEntry + AVINDEX_KEYFRAME = $0001; + + AVFMTCTX_NOHEADER = $0001; (**< signal that no header is present + (streams are added dynamically) *) + + MAX_STREAMS = 20; + + + AVFMT_NOOUTPUTLOOP = -1; + AVFMT_INFINITEOUTPUTLOOP = 0; + AVFMT_FLAG_GENPTS = $0001; ///< Generate missing pts even if it requires parsing future frames. + AVFMT_FLAG_IGNIDX = $0002; ///< Ignore index. + AVFMT_FLAG_NONBLOCK = $0004; ///< Do not block when reading packets from input. + AVFMT_FLAG_IGNDTS = $0008; ///< Ignore DTS on frames that contain both DTS & PTS + AVFMT_FLAG_NOFILLIN = $0010; ///< Do not infer any values from other values, just return what is stored in the container + AVFMT_FLAG_NOPARSE = $0020; ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled + AVFMT_FLAG_RTP_HINT = $0040; ///< Add RTP hinting to the output file + + // used by AVStream + MAX_REORDER_DELAY = 16; + + // used by TAVProgram + AV_PROGRAM_RUNNING = 1; + + + AV_DISPOSITION_DEFAULT = $0001; + AV_DISPOSITION_DUB = $0002; + AV_DISPOSITION_ORIGINAL = $0004; + AV_DISPOSITION_COMMENT = $0008; + AV_DISPOSITION_LYRICS = $0010; + AV_DISPOSITION_KARAOKE = $0020; + + (** + * Track should be used during playback by default. + * Useful for subtitle track that should be displayed + * even when user did not explicitly ask for subtitles. + *) + AV_DISPOSITION_FORCED = $0040; + + // used by TAVFormatContext.debug + FF_FDEBUG_TS = 0001; + + MAX_PROBE_PACKETS = 2500; + RAW_PACKET_BUFFER_SIZE = 2500000; + +type + PPAVCodecTag = ^PAVCodecTag; + PAVCodecTag = Pointer; + + PAVFormatParameters = ^TAVFormatParameters; + + PAVOutputFormat = ^TAVOutputFormat; + PAVProbeData = ^TAVProbeData; + + PAVInputFormat = ^TAVInputFormat; + PAVIndexEntry = ^TAVIndexEntry; + + PAVStream = ^TAVStream; + PAVPacketList = ^TAVPacketList; + + PPAVProgram = ^PAVProgram; + PAVProgram = ^TAVProgram; + + PPAVFormatContext = ^PAVFormatContext; + PAVFormatContext = ^TAVFormatContext; + +(** + * Convert all the metadata sets from ctx according to the source and + * destination conversion tables. + * + * @param d_conv destination tags format conversion table + * @param s_conv source tags format conversion table + *) + PAVMetadataConv = ^TAVMetadataConv; + TAVMetadataConv = record + ctx: PAVFormatContext; + d_conv: {const} PAVMetadataConv; + s_conv: {const} PAVMetadataConv; + end; + + PAVChapter = ^TAVChapter; + TAVChapter = record + id: cint; ///< unique ID to identify the chapter + time_base: TAVRational; ///< time base in which the start/end timestamps are specified + start, end_: cint64; ///< chapter start/end time in time_base units +{$IF FF_API_OLD_METADATA} + title: PAnsiChar; ///< chapter title +{$ENDIF} + metadata: PAVMetadata; + end; + + TAVChapterArray = array[0..(MaxInt div SizeOf(TAVChapter))-1] of TAVChapter; + PAVChapterArray = ^TAVChapterArray; + + TAVFormatParameters = record + time_base: TAVRational; + sample_rate: cint; + channels: cint; + width: cint; + height: cint; + pix_fmt: TAVPixelFormat; + channel: cint; (**< Used to select DV channel. *) + standard: PAnsiChar; (**< TV standard, NTSC, PAL, SECAM *) + { Delphi does not support bit fields -> use bf_flags instead + unsigned int mpeg2ts_raw:1; (**< Force raw MPEG-2 transport stream output, if possible. *) + unsigned int mpeg2ts_compute_pcr:1; (**< Compute exact PCR for each transport + stream packet (only meaningful if + mpeg2ts_raw is TRUE). *) + unsigned int initial_pause:1; (**< Do not begin to play the stream + immediately (RTSP only). *) + unsigned int prealloced_context:1; + } + bf_flags: byte; // 0:mpeg2ts_raw/1:mpeg2ts_compute_pcr/2:initial_pause/3:prealloced_context + video_codec_id: TCodecID; + audio_codec_id: TCodecID; + end; + + TAVOutputFormat = record + name: PAnsiChar; + (** + * Descriptive name for the format, meant to be more human-readable + * than name. You should use the NULL_IF_CONFIG_SMALL() macro + * to define it. + *) + long_name: PAnsiChar; + mime_type: PAnsiChar; + extensions: PAnsiChar; (**< comma-separated filename extensions *) + (** + * size of private data so that it can be allocated in the wrapper + *) + priv_data_size: cint; + (* output support *) + audio_codec: TCodecID; (**< default audio codec *) + video_codec: TCodecID; (**< default video codec *) + write_header: function (c: PAVFormatContext): cint; cdecl; + write_packet: function (c: PAVFormatContext; pkt: PAVPacket): cint; cdecl; + write_trailer: function (c: PAVFormatContext): cint; cdecl; + (** + * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER + *) + flags: cint; + (** + * Currently only used to set pixel format if not YUV420P. + *) + set_parameters: function (c: PAVFormatContext; f: PAVFormatParameters): cint; cdecl; + interleave_packet: function (s: PAVFormatContext; out_: PAVPacket; + in_: PAVPacket; flush: cint): cint; cdecl; + + (** + * List of supported codec_id-codec_tag pairs, ordered by "better + * choice first". The arrays are all terminated by CODEC_ID_NONE. + *) + codec_tag: {const} PPAVCodecTag; + + subtitle_codec: TCodecID; (**< default subtitle codec *) + + {const} metadata_conv: PAVMetadataConv; + + (* private fields *) + next: PAVOutputFormat; + end; + + TAVInputFormat = record + (** + * A comma separated list of short names for the format. New names + * may be appended with a minor bump. + *) + name: PAnsiChar; + + (** + * Descriptive name for the format, meant to be more human-readable + * than name. You should use the NULL_IF_CONFIG_SMALL() macro + * to define it. + *) + long_name: PAnsiChar; + + (** + * Size of private data so that it can be allocated in the wrapper. + *) + priv_data_size: cint; + + (** + * Tell if a given file has a chance of being parsed as this format. + * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes + * big so you do not have to check for that unless you need more. + *) + read_probe: function (p: PAVProbeData): cint; cdecl; + + (** + * Read the format header and initialize the AVFormatContext + * structure. Return 0 if OK. 'ap' if non-NULL contains + * additional parameters. Only used in raw format right + * now. 'av_new_stream' should be called to create new streams. + *) + read_header: function (c: PAVFormatContext; ap: PAVFormatParameters): cint; 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. + * @return 0 on success, < 0 on error. + * When returning an error, pkt must not have been allocated + * or must be freed before returning + *) + read_packet: function (c: PAVFormatContext; var pkt: TAVPacket): cint; cdecl; + + (** + * Close the stream. The AVFormatContext and AVStreams are not + * freed by this function + *) + read_close: function (c: PAVFormatContext): cint; 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. + * @return >= 0 on success (but not necessarily the new offset) + *) + read_seek: function (c: PAVFormatContext; stream_index: cint; + timestamp: cint64; flags: cint): cint; cdecl; + + (** + * Gets the next timestamp in stream[stream_index].time_base units. + * @return the timestamp or AV_NOPTS_VALUE if an error occurred + *) + read_timestamp: function (s: PAVFormatContext; stream_index: cint; + pos: pint64; pos_limit: cint64): cint64; cdecl; + + (** + * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. + *) + flags: cint; + + (** + * If extensions are defined, then no probe is done. You should + * usually not use extension format guessing because it is not + * reliable enough + *) + extensions: PAnsiChar; + + (** + * General purpose read-only value that the format can use. + *) + value: cint; + + (** + * Start/resume playing - only meaningful if using a network-based format + * (RTSP). + *) + read_play: function (c: PAVFormatContext): cint; cdecl; + + (** + * Pause playing - only meaningful if using a network-based format + * (RTSP). + *) + read_pause: function (c: PAVFormatContext): cint; cdecl; + + codec_tag: {const} PPAVCodecTag; + + (** + * Seek to timestamp ts. + * Seeking will be done so that the point from which all active streams + * can be presented successfully will be closest to ts and within min/max_ts. + * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. + *) + read_seek2: function (s: PAVFormatContext; + stream_index: cint; + min_ts: cint64; + ts: cint64; + max_ts: cint64; + flags: cint): cint; cdecl; + + {const} metadata_conv: PAVMetadataConv; + + (* private fields *) + next: PAVInputFormat; + end; + + TAVStreamParseType = ( + AVSTREAM_PARSE_NONE, + AVSTREAM_PARSE_FULL, (**< full parsing and repack *) + AVSTREAM_PARSE_HEADERS, (**< Only parse headers, do not repack. *) + AVSTREAM_PARSE_TIMESTAMPS, (**< full parsing and interpolation of timestamps for frames not starting on a packet boundary *) + AVSTREAM_PARSE_FULL_ONCE (**< full parsing and repack of the first frame only, only implemented for H.264 currently *) + ); + + TAVIndexEntry = record + pos: cint64; + timestamp: cint64; + { Delphi doesn't support bitfields -> use flags_size instead + int flags:2; + int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment). + } + flags_size: cint; // 0..1: flags, 2..31: size + min_distance: cint; (**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. *) + end; + + (** + * Stream structure. + * 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(AVStream) must not be used outside libav*. + *) + TAVStream = record + index: cint; (**< stream index in AVFormatContext *) + id: cint; (**< format-specific stream ID *) + codec: PAVCodecContext; (**< codec context *) + (** + * Real base framerate of the stream. + * This is the lowest framerate with which all timestamps can be + * represented accurately (it is the least common multiple of all + * framerates in the stream). Note, this value is just a guess! + * For example, if the time base 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() *) + first_dts: cint64; + + (** + * encoding: pts generation when outputting stream + *) + pts: TAVFrac; + (** + * This is the fundamental unit of time (in seconds) in terms + * of which frame timestamps are represented. For fixed-fps content, + * time base should be 1/framerate and timestamp increments should be 1. + *) + time_base: TAVRational; + pts_wrap_bits: cint; (* number of bits in pts (used for wrapping control) *) + (* ffmpeg.c private use *) + stream_copy: cint; (**< If set, just copy stream. *) + discard: TAVDiscard; ///< Selects which packets can be discarded at will and do not 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: cfloat; + + (** + * Decoding: pts of the first frame of the stream, in stream time base. + * Only set this if you are absolutely 100% sure that the value you set + * it to really is the pts of the first frame. + * This may be undefined (AV_NOPTS_VALUE). + * @note The ASF header does NOT contain a correct start_time the ASF + * demuxer must NOT set this. + *) + start_time: cint64; + + (** + * Decoding: duration of the stream, in stream time base. + * If a source file does not specify a duration, but does specify + * a bitrate, this value will be estimated from bitrate and file size. + *) + duration: cint64; + +{$IF FF_API_OLD_METADATA} + language: array [0..3] of PAnsiChar; (**< ISO 639-2/B 3-letter language code (empty string if undefined) *) +{$ENDIF} + + (* av_read_frame() support *) + need_parsing: TAVStreamParseType; + parser: PAVCodecParserContext; + + cur_dts: cint64; + last_IP_duration: cint; + last_IP_pts: cint64; + (* av_seek_frame() support *) + index_entries: PAVIndexEntry; (**< Only used if the format does not + support seeking natively. *) + nb_index_entries: cint; + index_entries_allocated_size: cuint; + + nb_frames: cint64; ///< number of frames in this stream if known or 0 + + unused: array [0..4] of cint64; +{$IF FF_API_OLD_METADATA} + filename: PAnsiChar; (**< source filename of the stream *) +{$ENDIF} + + disposition: cint; (**< AV_DISPOSITION_* bitfield *) + probe_data: TAVProbeData; + pts_buffer: array [0..MAX_REORDER_DELAY] of cint64; + + (** + * sample aspect ratio (0 if unknown) + * - encoding: Set by user. + * - decoding: Set by libavformat. + *) + sample_aspect_ratio: TAVRational; + + metadata: PAVMetadata; + + {* Intended mostly for av_read_frame() support. Not supposed to be used by *} + {* external applications; try to use something else if at all possible. *} + cur_ptr: {const} PCuint8; + cur_len: cint; + cur_pkt: TAVPacket; + + // Timestamp generation support: + (** + * Timestamp corresponding to the last dts sync point. + * + * Initialized when AVCodecParserContext.dts_sync_point >= 0 and + * a DTS is received from the underlying container. Otherwise set to + * AV_NOPTS_VALUE by default. + *) + reference_dts: cint64; + + (** + * Number of packets to buffer for codec probing + * NOT PART OF PUBLIC API + *) + probe_packets: cint; + + (** + * last packet in packet_buffer for this stream when muxing. + * used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav* + *) + last_in_packet_buffer: PAVPacketList; + + (** + * Average framerate + *) + avg_frame_rate: TAVRational; + + (** + * Number of frames that have been demuxed during av_find_stream_info() + *) + codec_info_nb_frames: cint; + end; + + (** + * Format I/O 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(AVFormatContext) must not be used outside libav*. + *) + TAVFormatContext = record + av_class: PAVClass; (**< Set by avformat_alloc_context. *) + (* Can only be iformat or oformat, not both at the same time. *) + iformat: PAVInputFormat; + oformat: PAVOutputFormat; + priv_data: pointer; + + pb: PByteIOContext; + + nb_streams: cuint; + streams: array [0..MAX_STREAMS - 1] of PAVStream; + filename: array [0..1023] of AnsiChar; (* input or output filename *) + (* stream info *) + timestamp: cint64; +{$IF FF_API_OLD_METADATA} + title: array [0..511] of AnsiChar; + author: array [0..511] of AnsiChar; + copyright: array [0..511] of AnsiChar; + comment: array [0..511] of AnsiChar; + album: array [0..511] of AnsiChar; + year: cint; (**< ID3 year, 0 if none *) + track: cint; (**< track number, 0 if none *) + genre: array [0..31] of AnsiChar; (**< ID3 genre *) +{$ENDIF} + + ctx_flags: cint; (**< 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: cint64; + (** + * Decoding: duration of the stream, in AV_TIME_BASE fractional + * seconds. Only set this value if you know none of the individual stream + * durations and also dont set any of them. This is deduced from the + * AVStream values if not set. + *) + duration: cint64; + (** + * decoding: total file size, 0 if unknown + *) + file_size: cint64; + (** + * 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: cint; + + (* av_read_frame() support *) + cur_st: PAVStream; + cur_ptr_deprecated: pbyte; + cur_len_deprecated: cint; + cur_pkt_deprecated: TAVPacket; + + (* av_seek_frame() support *) + data_offset: cint64; (**< offset of the first packet *) + index_built: cint; + + mux_rate: cint; + packet_size: cuint; + preload: cint; + max_delay: cint; + + (** + * number of times to loop output in formats that support it + *) + loop_output: cint; + + flags: cint; + loop_input: cint; + + (** + * decoding: size of data to probe; encoding: unused. + *) + probesize: cuint; + + (** + * Maximum time (in AV_TIME_BASE units) during which the input should + * be analyzed in av_find_stream_info(). + *) + max_analyze_duration: cint; + + key: pbyte; + keylen : cint; + + nb_programs: cuint; + programs: PPAVProgram; + + (** + * Forced video codec_id. + * Demuxing: Set by user. + *) + video_codec_id: TCodecID; + + (** + * Forced audio codec_id. + * Demuxing: Set by user. + *) + audio_codec_id: TCodecID; + + (** + * Forced subtitle codec_id. + * Demuxing: Set by user. + *) + subtitle_codec_id: TCodecID; + + (** + * Maximum amount of memory in bytes to use for the index of each stream. + * If the index exceeds this size, entries will be discarded as + * needed to maintain a smaller size. This can lead to slower or less + * accurate seeking (depends on demuxer). + * Demuxers for which a full in-memory index is mandatory will ignore + * this. + * muxing : unused + * demuxing: set by user + *) + max_index_size: cuint; + + (** + * Maximum amount of memory in bytes to use for buffering frames + * obtained from realtime capture devices. + *) + max_picture_buffer: cuint; + nb_chapters: cuint; + chapters: PAVChapterArray; + + (** + * Flags to enable debugging. + *) + debug: cint; + + (** + * Raw packets from the demuxer, prior to parsing and decoding. + * This buffer is used for buffering packets until the codec can + * be identified, as parsing cannot be done without knowing the + * codec. + *) + raw_packet_buffer: PAVPacketList; + raw_packet_buffer_end: PAVPacketList; + + packet_buffer_end: PAVPacketList; + + metadata: PAVMetadata; + + (** + * Remaining size available for raw_packet_buffer, in bytes. + * NOT PART OF PUBLIC API + *) + raw_packet_buffer_remaining_size: cint; + + (** + * Start time of the stream in real world time, in microseconds + * since the unix epoch (00:00 1st January 1970). That is, pts=0 + * in the stream was captured at this real world time. + * - encoding: Set by user. + * - decoding: Unused. + *) + start_time_realtime: cint64; + + end; + + (** + * 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(AVProgram) must not be used outside libav*. + *) + TAVProgram = record + id : cint; +{$IF FF_API_OLD_METADATA} + provider_name : PAnsiChar; ///< network name for DVB streams + name : PAnsiChar; ///< service name for DVB streams +{$ENDIF} + flags : cint; + discard : TAVDiscard; ///< selects which program to discard and which to feed to the caller + stream_index : PCardinal; + nb_stream_indexes : PCardinal; + metadata : PAVMetadata; + end; + + TAVPacketList = record + pkt: TAVPacket; + next: PAVPacketList; + end; + +(** + * Convert all the metadata sets from ctx according to the source and + * destination conversion tables. If one of the tables is NULL, then + * tags are converted to/from ffmpeg generic tag names. + * + * @param d_conv destination tags format conversion table + * @param s_conv source tags format conversion table + *) +procedure av_metadata_conv(ctx: PAVFormatContext; {const} d_conv: PAVMetadataConv; + {const} s_conv: PAVMetadataConv); + cdecl; external av__format; + +{ +var + first_iformat: PAVInputFormat; external av__format; + first_oformat: PAVOutputFormat; external av__format; +} + +(** + * If f is NULL, returns the first registered input format, + * if f is non-NULL, returns the next registered input format after f + * or NULL if f is the last one. + *) +function av_iformat_next(f: PAVInputFormat): PAVInputFormat; + cdecl; external av__format; +(** + * If f is NULL, returns the first registered output format, + * if f is non-NULL, returns the next registered input format after f + * or NULL if f is the last one. + *) +function av_oformat_next(f: PAVOutputFormat): PAVOutputFormat; + cdecl; external av__format; + +function av_guess_image2_codec(filename: {const} PAnsiChar): TCodecID; + cdecl; external av__format; + +(* XXX: Use automatic init with either ELF sections or C file parser *) +(* modules. *) + +(* 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: PAnsiChar; + filename: PAnsiChar; + mime_type: PAnsiChar): PAVOutputFormat; + cdecl; external av__format; deprecated; + +(** + * Return the output format in the list of registered output formats + * which best matches the provided parameters, or return NULL if + * there is no match. + * + * @param short_name if non-NULL checks if short_name matches with the + * names of the registered formats + * @param filename if non-NULL checks if filename terminates with the + * extensions of the registered formats + * @param mime_type if non-NULL checks if mime_type matches with the + * MIME type of the registered formats + *) +(** + * @deprecated Use av_guess_format() instead. + *) +function guess_format(short_name: PAnsiChar; + filename: PAnsiChar; + mime_type: PAnsiChar): PAVOutputFormat; + cdecl; external av__format; deprecated; + +function av_guess_format(short_name: PAnsiChar; + filename: PAnsiChar; + mime_type: PAnsiChar): PAVOutputFormat; + cdecl; external av__format; + +(** + * Guess the codec ID based upon muxer and filename. + *) +function av_guess_codec(fmt: PAVOutputFormat; short_name: PAnsiChar; + filename: PAnsiChar; mime_type: PAnsiChar; + type_: TCodecType): TCodecID; + cdecl; external av__format; + +(** + * Send a nice hexadecimal dump of a buffer to the specified file stream. + * + * @param f The file stream pointer where the dump should be sent to. + * @param buf buffer + * @param size buffer size + * + * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log + *) +procedure av_hex_dump(f: PAVFile; buf: PByteArray; size: cint); + cdecl; external av__format; + +(** + * Send a nice hexadecimal dump of a buffer to the log. + * + * @param avcl A pointer to an arbitrary struct of which the first field is a + * pointer to an AVClass struct. + * @param level The importance level of the message, lower values signifying + * higher importance. + * @param buf buffer + * @param size buffer size + * + * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log + *) +procedure av_hex_dump_log(avcl: Pointer; level: cint; buf: PByteArray; size: cint); + cdecl; external av__format; + +(** + * Send a nice dump of a packet to the specified file stream. + * + * @param f The file stream pointer where the dump should be sent to. + * @param pkt packet to dump + * @param dump_payload True if the payload must be displayed, too. + *) +procedure av_pkt_dump(f: PAVFile; pkt: PAVPacket; dump_payload: cint); + cdecl; external av__format; + +(** + * Send a nice dump of a packet to the log. + * + * @param avcl A pointer to an arbitrary struct of which the first field is a + * pointer to an AVClass struct. + * @param level The importance level of the message, lower values signifying + * higher importance. + * @param pkt packet to dump + * @param dump_payload True if the payload must be displayed, too. + *) +procedure av_pkt_dump_log(avcl: Pointer; level: cint; pkt: PAVPacket; dump_payload: cint); + cdecl; external av__format; + +(** + * Initialize libavformat and register all the muxers, demuxers and + * protocols. If you do not call this function, then you can select + * exactly which formats you want to support. + * + * @see av_register_input_format() + * @see av_register_output_format() + * @see av_register_protocol() + *) +procedure av_register_all(); + cdecl; external av__format; + +(** + * Get the CodecID for the given codec tag tag. + * If no codec id is found returns CODEC_ID_NONE. + * + * @param tags list of supported codec_id-codec_tag pairs, as stored + * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag + *) +function av_codec_get_id(var tags: PAVCodecTag; tag: cuint): TCodecID; + cdecl; external av__format; + +(** + * Getsthe codec tag for the given codec id id. + * If no codec tag is found returns 0. + * + * @param tags list of supported codec_id-codec_tag pairs, as stored + * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag + *) +function av_codec_get_tag(var tags: PAVCodecTag; id: TCodecID): cuint; + cdecl; external av__format; + +(* media file input *) + +(** + * Find AVInputFormat based on the short name of the input format. + *) +function av_find_input_format(short_name: PAnsiChar): PAVInputFormat; + cdecl; external av__format; + +(** + * Guess file format. + * + * @param is_opened Whether the file is already opened; determines whether + * demuxers with or without AVFMT_NOFILE are probed. + *) +function av_probe_input_format(pd: PAVProbeData; is_opened: cint): PAVInputFormat; + cdecl; external av__format; + +(** + * Guess the file format. + * + * @param is_opened Whether the file is already opened; determines whether + * demuxers with or without AVFMT_NOFILE are probed. + * @param score_max A probe score larger that this is required to accept a + * detection, the variable is set to the actual detection + * score afterwards. + * If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended + * to retry with a larger probe buffer. + *) +function av_probe_input_format2(pd: PAVProbeData; is_opened: cint; score_max: PCint): PAVInputFormat; + cdecl; external av__format; + +(** + * Allocate all the structures needed to read an input stream. + * This does not open the needed codecs for decoding the stream[s]. + *) +function av_open_input_stream(var ic_ptr: PAVFormatContext; + pb: PByteIOContext; filename: PAnsiChar; + fmt: PAVInputFormat; ap: PAVFormatParameters): cint; + cdecl; external av__format; + +(** + * Open a media file as input. The codecs 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 Additional 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: PAnsiChar; + fmt: PAVInputFormat; buf_size: cint; + ap: PAVFormatParameters): cint; + cdecl; external av__format; + +(** + * Allocate an AVFormatContext. + * Can be freed with av_free() but do not forget to free everything you + * explicitly allocated as well! + *) +function avformat_alloc_context(): PAVFormatContext; + cdecl; external av__format; + +(** + * @deprecated Use avformat_alloc_context() instead. + *) +function av_alloc_format_context(): PAVFormatContext; + cdecl; external av__format; + +(** + * Read packets of a media file to get stream information. This + * is useful for file formats with no headers such as MPEG. This + * function also computes the real framerate in case of MPEG-2 repeat + * frame mode. + * The logical file position is not changed by this function; + * examined packets may be buffered for later processing. + * + * @param ic media file handle + * @return >=0 if OK, AVERROR_xxx on error + * @todo Let the user decide somehow what information is needed so that + * we do not waste time getting stuff the user does not need. + *) +function av_find_stream_info(ic: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Read a transport packet from a media file. + * + * This function is obsolete and should never be used. + * Use av_read_frame() instead. + * + * @param s media file handle + * @param pkt is filled + * @return 0 if OK, AVERROR_xxx on error + *) +function av_read_packet(s: PAVFormatContext; var pkt: TAVPacket): cint; + 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 cint 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 AVStream.time_base units (and guessed if the format cannot + * provide 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 on error or end of file + *) +function av_read_frame(s: PAVFormatContext; var pkt: TAVPacket): cint; + cdecl; external av__format; + +(** + * Seek to the keyframe at timestamp. + * 'timestamp' in 'stream_index'. + * @param stream_index If stream_index is (-1), a default + * stream is selected, and timestamp is automatically converted + * from AV_TIME_BASE units to the stream specific time_base. + * @param timestamp Timestamp in AVStream.time_base units + * or, if no stream is specified, in AV_TIME_BASE units. + * @param flags flags which select direction and seeking mode + * @return >= 0 on success + *) +function av_seek_frame(s: PAVFormatContext; stream_index: cint; timestamp: cint64; + flags: cint): cint; + cdecl; external av__format; + +(** + * Seek to timestamp ts. + * Seeking will be done so that the point from which all active streams + * can be presented successfully will be closest to ts and within min/max_ts. + * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. + * + * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in byte and + * are the file position (this may not be supported by all demuxers). + * If flags contain AVSEEK_FLAG_FRAME then all timestamps are in frames + * in the stream with stream_index (this may not be supported by all demuxers). + * Otherwise all timestamps are in units of the stream selected by stream_index + * or if stream_index is -1, in AV_TIME_BASE units. + * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as + * keyframes (this may not be supported by all demuxers). + * + * @param stream_index index of the stream which is used as time base reference. + * @param min_ts smallest acceptable timestamp + * @param ts target timestamp + * @param max_ts largest acceptable timestamp + * @param flags flags + * @return >=0 on success, error code otherwise + * + * @note This is part of the new seek API which is still under construction. + * Thus do not use this yet. It may change at any time, do not expect + * ABI compatibility yet! + *) +function avformat_seek_file(s: PAVFormatContext; + stream_index: cint; + min_ts: cint64; + ts: cint64; + max_ts: cint64; + flags: cint): cint; + cdecl; external av__format; + +(** + * Start playing a network-based stream (e.g. RTSP stream) at the + * current position. + *) +function av_read_play(s: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Pause a network-based stream (e.g. RTSP stream). + * + * Use av_read_play() to resume it. + *) +function av_read_pause(s: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Free a AVFormatContext allocated by av_open_input_stream. + * @param s context to free + *) +procedure av_close_input_stream(s: PAVFormatContext); + cdecl; external av__format; + +(** + * Close a media file (but not its codecs). + * + * @param s media file handle + *) +procedure av_close_input_file(s: PAVFormatContext); + cdecl; external av__format; + +(** + * Add a new stream to a media file. + * + * Can only be called in the read_header() function. If the flag + * AVFMTCTX_NOHEADER is in the format context, then new streams + * can be added in read_packet too. + * + * @param s media file handle + * @param id file-format-dependent stream ID + *) +function av_new_stream(s: PAVFormatContext; id: cint): PAVStream; + cdecl; external av__format; + +function av_new_program(s: PAVFormatContext; id: cint): PAVProgram; + cdecl; external av__format; + +(** + * Add a new chapter. + * This function is NOT part of the public API + * and should ONLY be used by demuxers. + * + * @param s media file handle + * @param id unique ID for this chapter + * @param start chapter start time in time_base units + * @param end chapter end time in time_base units + * @param title chapter title + * + * @return AVChapter or NULL on error + *) +function ff_new_chapter(s: PAVFormatContext; id: cint; time_base: TAVRational; + start, end_: cint64; title: {const} PAnsiChar): PAVChapter; + cdecl; external av__format; + +(** + * Set the pts for a given stream. + * + * @param s stream + * @param pts_wrap_bits number of bits effectively used by the pts + * (used for wrap control, 33 is the value for MPEG) + * @param pts_num numerator to convert to seconds (MPEG: 1) + * @param pts_den denominator to convert to seconds (MPEG: 90000) + *) +procedure av_set_pts_info(s: PAVStream; pts_wrap_bits: cint; + pts_num: cuint; pts_den: cuint); + 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 + AVSEEK_FLAG_FRAME = 8; + +function av_find_default_stream_index(s: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Get the index for a specific timestamp. + * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond + * to the timestamp which is <= the requested one, if backward + * is 0, then it will be >= + * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise + * @return < 0 if no such timestamp could be found + *) +function av_index_search_timestamp(st: PAVStream; timestamp: cint64; flags: cint): cint; + cdecl; external av__format; + +(** + * Ensure the index uses less memory than the maximum specified in + * AVFormatContext.max_index_size by discarding entries if it grows + * too large. + * This function is not part of the public API and should only be called + * by demuxers. + *) +procedure ff_reduce_index(s: PAVFormatContext; stream_index: cint); + cdecl; external av__format; + +(** + * Add an index entry into a sorted list. Update the entry if the list + * already contains it. + * + * @param timestamp timestamp in the timebase of the given stream + *) +function av_add_index_entry(st: PAVStream; pos: cint64; timestamp: cint64; + size: cint; distance: cint; flags: cint): cint; + cdecl; external av__format; + +(** + * Perform a binary search using av_index_search_timestamp() and + * AVInputFormat.read_timestamp(). + * This is not supposed to be called directly by a user application, + * but by demuxers. + * @param target_ts target timestamp in the time base of the given stream + * @param stream_index stream number + *) +function av_seek_frame_binary(s: PAVFormatContext; stream_index: cint; + target_ts: cint64; flags: cint): cint; + cdecl; external av__format; + +(** + * Update cur_dts of all streams based on the given timestamp and AVStream. + * + * Stream ref_st unchanged, others set cur_dts in their native time base. + * Only needed for timestamp wrapping or if (dts not set and pts!=dts). + * @param timestamp new dts expressed in time_base of param ref_st + * @param ref_st reference stream giving time_base of param timestamp + *) +procedure av_update_cur_dts(s: PAVFormatContext; ref_st: PAVStream; + timestamp: cint64); + cdecl; external av__format; + +type + TReadTimestampFunc = function (pavfc: PAVFormatContext; + arg2: cint; arg3: Pint64; arg4: cint64): cint64; cdecl; + +(** + * Perform a binary search using read_timestamp(). + * This is not supposed to be called directly by a user application, + * but by demuxers. + * @param target_ts target timestamp in the time base of the given stream + * @param stream_index stream number + *) +function av_gen_search(s: PAVFormatContext; stream_index: cint; + target_ts: cint64; pos_min: cint64; + pos_max: cint64; pos_limit: cint64; + ts_min: cint64; ts_max: cint64; + flags: cint; ts_ret: Pint64; + read_timestamp: TReadTimestampFunc): cint64; + cdecl; external av__format; + +(** + * media file output + *) +function av_set_parameters(s: PAVFormatContext; ap: PAVFormatParameters): cint; + cdecl; external av__format; + +(** + * Split a URL string into components. + * + * The pointers to buffers for storing individual components may be null, + * in order to ignore that component. Buffers for components not found are + * set to empty strings. If the port is not found, it is set to a negative + * value. + * + * @param proto the buffer for the protocol + * @param proto_size the size of the proto buffer + * @param authorization the buffer for the authorization + * @param authorization_size the size of the authorization buffer + * @param hostname the buffer for the host name + * @param hostname_size the size of the hostname buffer + * @param port_ptr a pointer to store the port number in + * @param path the buffer for the path + * @param path_size the size of the path buffer + * @param url the URL to split + *) +procedure av_url_split(proto: PAnsiChar; proto_size: cint; + authorization: PAnsiChar; authorization_size: cint; + hostname: PAnsiChar; hostname_size: cint; + port_ptr: Pcint; + path: PAnsiChar; path_size: cint; + {const} url: PAnsiChar); + cdecl; external av__format; + +(** + * Allocate the stream private data and write the stream header to an + * output media file. + * + * @param s media file handle + * @return 0 if OK, AVERROR_xxx on error + *) +function av_write_header(s: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Write a packet to an output media file. + * + * The packet shall contain one audio or video frame. + * The packet must be correctly interleaved according to the container + * specification, if not then av_interleaved_write_frame must be used. + * + * @param s media file handle + * @param pkt The packet, which contains the stream_index, buf/buf_size, + * dts/pts, ... + * @return < 0 on error, = 0 if OK, 1 if end of stream wanted + *) +function av_write_frame(s: PAVFormatContext; var pkt: TAVPacket): cint; + cdecl; external av__format; + +(** + * Write a packet to an output media file ensuring correct interleaving. + * + * The packet must contain one audio or video frame. + * If the packets are already correctly interleaved, the application should + * call av_write_frame() instead as it is slightly faster. It is also important + * to keep in mind that completely non-interleaved input will need huge amounts + * of memory to interleave with this, so it is preferable to interleave at the + * demuxer level. + * + * @param s media file handle + * @param pkt The packet, which contains the stream_index, buf/buf_size, + * dts/pts, ... + * @return < 0 on error, = 0 if OK, 1 if end of stream wanted + *) +function av_interleaved_write_frame(s: PAVFormatContext; var pkt: TAVPacket): cint; + cdecl; external av__format; + +(** + * Interleave a packet per dts in an output media file. + * + * Packets with pkt->destruct == av_destruct_packet will be freed inside this + * function, so they cannot be used after it. Note that calling av_free_packet() + * on them is still safe. + * + * @param s media file handle + * @param out the interleaved packet will be output here + * @param pkt the input packet + * @param flush 1 if no further packets are available as input and all + * remaining packets should be output + * @return 1 if a packet was output, 0 if no packet could be output, + * < 0 if an error occurred + *) +function av_interleave_packet_per_dts(s: PAVFormatContext; _out: PAVPacket; + pkt: PAVPacket; flush: cint): cint; + cdecl; external av__format; + +(** + * Add packet to AVFormatContext->packet_buffer list, determining its + * interleaved position using compare() function argument. + * + * This function is not part of the public API and should only be called + * by muxers using their own interleave function. + *) +{ +procedure ff_interleave_add_packet(s: PAVFormatContext; + pkt: PAVPacket; + compare: function(para1: PAVFormatContext; + para2: PAVPacket; + para3: PAVPacket): cint); + cdecl; external av__format; +} + +(** + * Write the stream trailer to an output media file and free the + * file private data. + * + * May only be called after a successful call to av_write_header. + * + * @param s media file handle + * @return 0 if OK, AVERROR_xxx on error + *) +function av_write_trailer(s: pAVFormatContext): cint; + cdecl; external av__format; + +procedure dump_format(ic: PAVFormatContext; index: cint; url: PAnsiChar; + is_output: cint); + cdecl; external av__format; + +(** + * Parse width and height out of string str. + * @deprecated Use av_parse_video_frame_size instead. + *) +function parse_image_size(width_ptr: PCint; height_ptr: PCint; + str: PAnsiChar): cint; + cdecl; external av__format; deprecated; + +(** + * Convert framerate from a string to a fraction. + * @deprecated Use av_parse_video_frame_rate instead. + *) +function parse_frame_rate(frame_rate: PCint; frame_rate_base: PCint; + arg: PByteArray): cint; + cdecl; external av__format; deprecated; + +(** + * Parse datestr and return a corresponding number of microseconds. + * @param datestr String representing a date or a duration. + * - If a date the syntax is: + * @code + * now|{[{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z|z]} + * @endcode + * If the value is "now" it takes the current time. + * Time is localtime unless Z is appended, in which case it is + * interpreted as UTC. + * If the year-month-day part is not specified it takes the current + * year-month-day. + * Returns the number of microseconds since 1st of January, 1970 up to + * the time of the parsed date or INT64_MIN if datestr cannot be + * successfully parsed. + * - If a duration the syntax is: + * @code + * [-]HH[:MM[:SS[.m...]]] + * [-]S+[.m...] + * @endcode + * @return the number of microseconds contained in a time interval + * with the specified duration or INT64_MIN if datestr cannot be + * successfully parsed. + * @param duration Flag which tells how to interpret datestr, if + * not zero datestr is interpreted as a duration, otherwise as a + * date. + *) +function parse_date(datestr: PAnsiChar; duration: cint): cint64; + cdecl; external av__format; + +(** + * Get the current time in microseconds. + *) +function av_gettime(): cint64; + cdecl; external av__format; + +(* ffm-specific for ffserver *) +const + FFM_PACKET_SIZE = 4096; + +function ffm_read_write_index(fd: cint): cint64; + cdecl; external av__format; + +function ffm_write_write_index(fd: cint; pos: cint64): cint; + cdecl; external av__format; + +procedure ffm_set_write_index(s: PAVFormatContext; pos: cint64; file_size: cint64); + cdecl; external av__format; + +(** + * Attempt to find a specific tag in a URL. + * + * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done. + * Return 1 if found. + *) +function find_info_tag(arg: PAnsiChar; arg_size: cint; tag1: PAnsiChar; info: PAnsiChar): cint; + cdecl; external av__format; + +(** + * Return in 'buf' the path with '%d' replaced by a number. + * + * Also handles the '%0nd' format where 'n' is the total number + * of digits and '%%'. + * + * @param buf destination buffer + * @param buf_size destination buffer size + * @param path numbered sequence string + * @param number frame number + * @return 0 if OK, -1 on format error + *) +function av_get_frame_filename(buf: PAnsiChar; buf_size: cint; + path: PAnsiChar; number: cint): cint; + cdecl; external av__format; + +(** + * Check whether filename actually is a numbered sequence generator. + * + * @param filename possible numbered sequence string + * @return 1 if a valid numbered sequence string, 0 otherwise + *) +function av_filename_number_test(filename: PAnsiChar): cint; + cdecl; external av__format; + +(** + * Generate an SDP for an RTP session. + * + * @param ac array of AVFormatContexts describing the RTP streams. If the + * array is composed by only one context, such context can contain + * multiple AVStreams (one AVStream per RTP stream). Otherwise, + * all the contexts in the array (an AVCodecContext per RTP stream) + * must contain only one AVStream. + * @param n_files number of AVCodecContexts contained in ac + * @param buff buffer where the SDP will be stored (must be allocated by + * the caller) + * @param size the size of the buffer + * @return 0 if OK, AVERROR_xxx on error + *) +function avf_sdp_create(ac: PPAVFormatContext; n_files: cint; buff: PByteArray; size: cint): cint; + cdecl; external av__format; + +(** + * Return a positive value if the given filename has one of the given + * extensions, 0 otherwise. + * + * @param extensions a comma-separated list of filename extensions + *) +function av_match_ext(filename: {const} Pchar; extensions: {const} Pchar): cint; + cdecl; external av__format; + +implementation + +end. |