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| -rw-r--r-- | src/lib/ffmpeg-0.11/avformat.pas | 2382 |
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diff --git a/src/lib/ffmpeg-0.11/avformat.pas b/src/lib/ffmpeg-0.11/avformat.pas new file mode 100644 index 00000000..ae3ab8e0 --- /dev/null +++ b/src/lib/ffmpeg-0.11/avformat.pas @@ -0,0 +1,2382 @@ +(* + * 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 0.11 libavformat/avformat.h + * Min. version: 53.31.100 + * Max. version: 53.32.100 + *) + +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} +{$ENDIF} + +interface + +uses + ctypes, + avcodec, + avio, + avutil, + rational, + SysUtils, + UConfig; + +const + (* + * IMPORTANT: This headers are valid for all minor revisions of ffmpeg + * version 0.10x + * This file has been created with the previous ffmpeg headers as a basis + * by removing all unneeded conditionals. + *) + (* Max. supported version by this header *) + LIBAVFORMAT_MAX_VERSION_MAJOR = 53; + LIBAVFORMAT_MAX_VERSION_MINOR = 32; + LIBAVFORMAT_MAX_VERSION_RELEASE = 100; + LIBAVFORMAT_MAX_VERSION = (LIBAVFORMAT_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MAX_VERSION_RELEASE * VERSION_RELEASE); + + (* Min. supported version by this header *) + LIBAVFORMAT_MIN_VERSION_MAJOR = 53; + LIBAVFORMAT_MIN_VERSION_MINOR = 31; + LIBAVFORMAT_MIN_VERSION_RELEASE = 100; + LIBAVFORMAT_MIN_VERSION = (LIBAVFORMAT_MIN_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MIN_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MIN_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$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!'} +{$IFEND} + +{ +const + LIBAVFORMAT_BUILD = LIBAVFORMAT_VERSION_INT; + LIBAVFORMAT_IDENT = 'Lavf' AV_STRINGIFY(LIBAVFORMAT_VERSION); +} + +(** + * Those FF_API_* defines are not part of public API. + * They may change, break or disappear at any time. + *) +const +{$ifndef FF_API_OLD_METADATA2} + FF_API_OLD_METADATA2 = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_OLD_AVIO} + FF_API_OLD_AVIO = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_DUMP_FORMAT} + FF_API_DUMP_FORMAT = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_PARSE_DATE} + FF_API_PARSE_DATE = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_FIND_INFO_TAG} + FF_API_FIND_INFO_TAG = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_PKT_DUMP} + FF_API_PKT_DUMP = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_GUESS_IMG2_CODEC} + FF_API_GUESS_IMG2_CODEC = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_SDP_CREATE} + FF_API_SDP_CREATE = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_ALLOC_OUTPUT_CONTEXT} + FF_API_ALLOC_OUTPUT_CONTEXT = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_FORMAT_PARAMETERS} + FF_API_FORMAT_PARAMETERS = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_FLAG_RTP_HINT} + FF_API_FLAG_RTP_HINT = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_AVSTREAM_QUALITY} + FF_API_AVSTREAM_QUALITY = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_LOOP_INPUT} + FF_API_LOOP_INPUT = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_LOOP_OUTPUT} + FF_API_LOOP_OUTPUT = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_TIMESTAMP} + FF_API_TIMESTAMP = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_FILESIZE} + FF_API_FILESIZE = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_MUXRATE} + FF_API_MUXRATE = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_RTSP_URL_OPTIONS} + FF_API_RTSP_URL_OPTIONS = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_NEW_STREAM} + FF_API_NEW_STREAM = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_PRELOAD} + FF_API_PRELOAD = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_STREAM_COPY} + FF_API_STREAM_COPY = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_SEEK_PUBLIC} + FF_API_SEEK_PUBLIC = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_REORDER_PRIVATE} + FF_API_REORDER_PRIVATE = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_OLD_INTERRUPT_CB} + FF_API_OLD_INTERRUPT_CB = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_SET_PTS_INFO} + FF_API_SET_PTS_INFO = (LIBAVFORMAT_VERSION_MAJOR < 54); +{$endif} +{$ifndef FF_API_CLOSE_INPUT_FILE} + FF_API_CLOSE_INPUT_FILE = (LIBAVFORMAT_VERSION_MAJOR < 55); +{$endif} + +(** + * @defgroup libavf I/O and Muxing/Demuxing Library + * @{ + * + * Libavformat (lavf) is a library for dealing with various media container + * formats. Its main two purposes are demuxing - i.e. splitting a media file + * into component streams, and the reverse process of muxing - writing supplied + * data in a specified container format. It also has an @ref lavf_io + * "I/O module" which supports a number of protocols for accessing the data (e.g. + * file, tcp, http and others). Before using lavf, you need to call + * av_register_all() to register all compiled muxers, demuxers and protocols. + * Unless you are absolutely sure you won't use libavformat's network + * capabilities, you should also call avformat_network_init(). + * + * A supported input format is described by an AVInputFormat struct, conversely + * an output format is described by AVOutputFormat. You can iterate over all + * registered input/output formats using the av_iformat_next() / + * av_oformat_next() functions. The protocols layer is not part of the public + * API, so you can only get the names of supported protocols with the + * avio_enum_protocols() function. + * + * Main lavf structure used for both muxing and demuxing is AVFormatContext, + * which exports all information about the file being read or written. As with + * most Libav structures, its size is not part of public ABI, so it cannot be + * allocated on stack or directly with av_malloc(). To create an + * AVFormatContext, use avformat_alloc_context() (some functions, like + * avformat_open_input() might do that for you). + * + * Most importantly an AVFormatContext contains: + * @li the @ref AVFormatContext.iformat "input" or @ref AVFormatContext.oformat + * "output" format. It is either autodetected or set by user for input; + * always set by user for output. + * @li an @ref AVFormatContext.streams "array" of AVStreams, which describe all + * elementary streams stored in the file. AVStreams are typically referred to + * using their index in this array. + * @li an @ref AVFormatContext.pb "I/O context". It is either opened by lavf or + * set by user for input, always set by user for output (unless you are dealing + * with an AVFMT_NOFILE format). + * + * @defgroup lavf_decoding Demuxing + * @{ + * Demuxers read a media file and split it into chunks of data (@em packets). A + * @ref AVPacket "packet" contains one or more frames which belong a single + * elementary stream. In lavf API this process is represented by the + * avformat_open_input() function for opening a file, av_read_frame() for + * reading a single packet and finally avformat_close_input(), which does the + * cleanup. + * + * @section lavf_decoding_open Opening a media file + * The minimum information required to open a file is its URL or filename, which + * is passed to avformat_open_input(), as in the following code: + * @code + * const char *url = "in.mp3"; + * AVFormatContext *s = NULL; + * int ret = avformat_open_input(&s, url, NULL, NULL); + * if (ret < 0) + * abort(); + * @endcode + * The above code attempts to allocate an AVFormatContext, open the + * specified file (autodetecting the format) and read the header, exporting the + * information stored there into s. Some formats do not have a header or do not + * store enough information there, so it is recommended that you call the + * avformat_find_stream_info() function which tries to read and decode a few + * frames to find missing information. + * + * In some cases you might want to preallocate an AVFormatContext yourself with + * avformat_alloc_context() and do some tweaking on it before passing it to + * avformat_open_input(). One such case is when you want to use custom functions + * for reading input data instead of lavf internal I/O layer. + * To do that, create your own AVIOContext with avio_alloc_context(), passing + * your reading callbacks to it. Then set the @em pb field of your + * AVFormatContext to newly created AVIOContext. + * + * After you have finished reading the file, you must close it with + * avformat_close_input(). It will free everything associated with the file. + * + * @section lavf_decoding_read Reading from an opened file + * + * @section lavf_decoding_seek Seeking + * @} + * + * @defgroup lavf_encoding Muxing + * @{ + * @} + * + * @defgroup lavf_io I/O Read/Write + * @{ + * @} + * + * @defgroup lavf_codec Demuxers + * @{ + * @defgroup lavf_codec_native Native Demuxers + * @{ + * @} + * @defgroup lavf_codec_wrappers External library wrappers + * @{ + * @} + * @} + * @defgroup lavf_protos I/O Protocols + * @{ + * @} + * @defgroup lavf_internal Internal + * @{ + * @} + * @} + * + *) + +type + PAVFile = Pointer; + +(* + * @defgroup metadata_api Public Metadata API + * @{ + * @ingroup libavf + * The metadata API allows libavformat to export metadata tags to a client + * application when demuxing. Conversely it allows a client application to + * set metadata when muxing. + * + * Metadata is exported or set as pairs of key/value strings in the 'metadata' + * fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs + * using the @ref lavu_dict "AVDictionary" API. Like all strings in FFmpeg, + * metadata is assumed to be 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: + * - 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. + * - 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. + * - 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. + * - 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. + * - 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". + * + * - 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: + * + @verbatim + 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 + @endverbatim + * + * Look in the examples section for an application example how to use the Metadata API. + * + * @} + *) + +{$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; + +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; + +(** + * 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; +(** + * @} + *) +{$IFEND} + +(* packet functions *) + +(** + * 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: PAVIOContext; var pkt: TAVPacket; size: cint): cint; + cdecl; external av__format; + +(** + * Read data and append it to the current content of the AVPacket. + * If pkt->size is 0 this is identical to av_get_packet. + * Note that this uses av_grow_packet and thus involves a realloc + * which is inefficient. Thus this function should only be used + * when there is no reasonable way to know (an upper bound of) + * the final size. + * + * @param pkt packet + * @param size amount of data to read + * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data + * will not be lost even if an error occurs. + *) +function av_append_packet(s: PAVIOContext; 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 avio_open, 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 *) + AVFMT_NOSTREAMS = $1000; (**< Format does not require any streams *) + AVFMT_NOBINSEARCH = $2000; (**< Format does not allow to fallback to binary search via read_timestamp *) + AVFMT_NOGENSEARCH = $4000; (**< Format does not allow to fallback to generic search *) + AVFMT_NO_BYTE_SEEK = $8000; (**< Format does not allow seeking by bytes *) + AVFMT_TS_NONSTRICT = $8000000; (**< Format does not require strictly + increasing timestamps, but they must + still be monotonic *) + + // 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 + + MAX_STD_TIMEBASES = (60*12+5); + + // 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; + + PPAVStream = ^PAVStream; + 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; + + 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 + end; + +(** + * @addtogroup lavf_encoding + * @{ + *) + 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 a packet. If AVFMT_ALLOW_FLUSH is set in flags, + * pkt can be NULL in order to flush data buffered in the muxer. + * When flushing, return 0 if there still is more data to flush, + * or 1 if everything was flushed and there is no more buffered + * data. + *) + write_packet: function (c: PAVFormatContext; pkt: PAVPacket): cint; cdecl; + write_trailer: function (c: PAVFormatContext): cint; cdecl; + (** + * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE, + * AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, + * AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH + *) + flags: cint; + + dummy: pointer; + + 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 *) + +{$IF FF_API_OLD_METADATA2} + {const} metadata_conv: PAVMetadataConv; +{$IFEND} + + {const} priv_class: PAVClass; ///< AVClass for the private context + + (** + * Test if the given codec can be stored in this container. + * + * @return 1 if the codec is supported, 0 if it is not. + * A negative number if unknown. + *) + query_codec: function (id: TCodecID; std_compliance: cint): cint; cdecl; + + get_output_timestamp: procedure (s: PAVFormatContext; stream: cint; + dts: Pcint64; wall: Pcint64); cdecl; + + (* private fields *) + next: PAVOutputFormat; + end; +(** + * @} + *) + +(** + * @addtogroup lavf_decoding + * @{ + *) + 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; + + (** + * Get 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, AVFMT_SHOW_IDS, + * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH, + * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK. + *) + 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; (**< + * Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are available + * when seeking to this entry. That means preferable PTS on keyframe based formats. + * But demuxers can choose to store a different timestamp, if it is more convenient for the implementation or nothing better + * is known + *) + { 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; + + PStreamInfo = ^TStreamInfo; + TStreamInfo = record + last_dts: cint64; + duration_gcd: cint64; + duration_count: cint; + duration_error: array[0..1] of array[0..1] of array[0..MAX_STD_TIMEBASES - 1] of cdouble; + codec_info_duration: cint64; + nb_decoded_frames: cint; + 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; + +{$IF FF_API_REORDER_PRIVATE} + (* internal data used in av_find_stream_info() *) + first_dts: cint64; +{$IFEND} + + (** + * encoding: pts generation when outputting stream + *) + pts: TAVFrac; + + (** + * This is the fundamental unit of time (in seconds) in terms + * of which frame timestamps are represented. For fixed-fps content, + * time base should be 1/framerate and timestamp increments should be 1. + * decoding: set by libavformat + * encoding: set by libavformat in av_write_header + *) + time_base: TAVRational; +{$IF FF_API_REORDER_PRIVATE} + pts_wrap_bits: cint; (* number of bits in pts (used for wrapping control) *) +{$IFEND} +{$IF FF_API_STREAM_COPY} + (* ffmpeg.c private use *) + stream_copy: cint; (**< If set, just copy stream. *) {deprecated} +{$IFEND} + discard: TAVDiscard; ///< Selects which packets can be discarded at will and do not need to be demuxed. +{$IF FF_API_AVSTREAM_QUALITY} + //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; {deprecated} +{$IFEND} + + (** + * Decoding: pts of the first frame of the stream in presentation order, in stream time base. + * Only set this if you are absolutely 100% sure that the value you set + * it to really is the pts of the first frame. + * This may be undefined (AV_NOPTS_VALUE). + * @note The ASF header does NOT contain a correct start_time the ASF + * demuxer must NOT set this. + *) + start_time: cint64; + + (** + * Decoding: duration of the stream, in stream time base. + * If a source file does not specify a duration, but does specify + * a bitrate, this value will be estimated from bitrate and file size. + *) + duration: cint64; + +{$IF FF_API_REORDER_PRIVATE} + (* 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; +{$IFEND} + + nb_frames: cint64; ///< number of frames in this stream if known or 0 + + disposition: cint; (**< AV_DISPOSITION_* bitfield *) + +{$IF FF_API_REORDER_PRIVATE} + probe_data: TAVProbeData; + pts_buffer: array [0..MAX_REORDER_DELAY] of cint64; +{$IFEND} + + (** + * sample aspect ratio (0 if unknown) + * - encoding: Set by user. + * - decoding: Set by libavformat. + *) + sample_aspect_ratio: TAVRational; + + metadata: PAVDictionary; + +{$IF FF_API_REORDER_PRIVATE} + {* 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, do not read or + * write from outside of libav* + *) + last_in_packet_buffer: PAVPacketList; +{$IFEND} + + (** + * Average framerate + *) + avg_frame_rate: TAVRational; + + (***************************************************************** + * All fields below this line are not part of the public API. They + * may not be used outside of libavformat and can be changed and + * removed at will. + * New public fields should be added right above. + ***************************************************************** + *) + + (** + * Number of frames that have been demuxed during av_find_stream_info() + *) + codec_info_nb_frames: cint; + + (** + * Stream Identifier + * This is the MPEG-TS stream identifier +1 + * 0 means unknown + *) + stream_identifier: cint; + + interleaver_chunk_size: cint64; + interleaver_chunk_duration: cint64; + + (** + * Stream information used internally by av_find_stream_info() + *) + info: PStreamInfo; + + (** + * flag to indicate that probing is requested + * NOT PART OF PUBLIC API + *) + request_probe: cint; +{$IF NOT FF_API_REORDER_PRIVATE} + {const} cur_ptr: PByte; + 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; + first_dts: cint64; + cur_dts: cint64; + last_IP_duration: cint; + last_IP_pts: cint64; + + (** + * Number of packets to buffer for codec probing + *) + probe_packets: cint; + + (** + * last packet in packet_buffer for this stream when muxing. + *) + last_in_packet_buffer: PAVPacketList; + probe_data: TAVProbeData; + pts_buffer: array [0..MAX_REORDER_DELAY] of cint64; + (* av_read_frame() support *) + need_parsing: TAVStreamParseType; + parser: PAVCodecParserContext; + + index_entries: PAVIndexEntry; (**< Only used if the format does not + support seeking natively. *) + nb_index_entries: cint; + index_entries_allocated_size: cuint; + + pts_wrap_bits: cint; (**< number of bits in pts (used for wrapping control) *) +{$IFEND} + 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; + flags: cint; + discard: TAVDiscard; ///< selects which program to discard and which to feed to the caller + stream_index: Pcuint; + nb_stream_indexes: cuint; + metadata: PAVDictionary; + + program_num: cint; + pmt_pid: cint; + pcr_pid: cint; + end; (*AVProgram*) + + 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 + metadata: PAVDictionary; + end; (*AVChapter*) + + TAVChapterArray = array[0..(MaxInt div SizeOf(TAVChapter))-1] of TAVChapter; + PAVChapterArray = ^TAVChapterArray; + + (** + * 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*, use + * avformat_alloc_context() to create an AVFormatContext. + *) + TAVFormatContext = record + (** + * A class for logging and AVOptions. Set by avformat_alloc_context(). + * Exports (de)muxer private options if they exist. + *) + av_class: PAVClass; (**< Set by avformat_alloc_context. *) + + (** + * Can only be iformat or oformat, not both at the same time. + * + * decoding: set by avformat_open_input(). + * encoding: set by the user. + *) + iformat: PAVInputFormat; + oformat: PAVOutputFormat; + + (** + * Format private data. This is an AVOptions-enabled struct + * if and only if iformat/oformat.priv_class is not NULL. + *) + priv_data: pointer; + + (* + * I/O context. + * + * decoding: either set by the user before avformat_open_input() (then + * the user must close it manually) or set by avformat_open_input(). + * encoding: set by the user. + * + * Do NOT set this field if AVFMT_NOFILE flag is set in + * iformat/oformat.flags. In such a case, the (de)muxer will handle + * I/O in some other way and this field will be NULL. + *) + pb: PByteIOContext; + + (** + * A list of all streams in the file. New streams are created with + * avformat_new_stream(). + * + * decoding: streams are created by libavformat in avformat_open_input(). + * If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also + * appear in av_read_frame(). + * encoding: streams are created by the user before avformat_write_header(). + *) + nb_streams: cuint; + streams: PPAVStream; + + filename: array [0..1023] of AnsiChar; (* input or output filename *) + (* stream info *) +{$IF FF_API_TIMESTAMP} + (** + * @deprecated use 'creation_time' metadata tag instead + *) + timestamp: cint64; {deprecated} +{$IFEND} + + ctx_flags: cint; (**< Format-specific flags, see AVFMTCTX_xx *) +{$IF FF_API_REORDER_PRIVATE} + (* 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; +{$IFEND} + + (** + * Decoding: position of the first frame of the component, in + * AV_TIME_BASE fractional seconds. NEVER set this value directly: + * It is deduced from the AVStream values. + *) + start_time: cint64; + (** + * Decoding: duration of the stream, in AV_TIME_BASE fractional + * seconds. Only set this value if you know none of the individual stream + * durations and also dont set any of them. This is deduced from the + * AVStream values if not set. + *) + duration: cint64; + +{$IF FF_API_FILESIZE} + (** + * decoding: total file size, 0 if unknown + *) + file_size: cint64; +{$IFEND} + + (** + * Decoding: total stream bitrate in bit/s, 0 if not + * available. Never set it directly if the file_size and the + * duration are known as ffmpeg can compute it automatically. + *) + bit_rate: cint; + +{$IF FF_API_REORDER_PRIVATE} + (* av_read_frame() support *) + cur_st: PAVStream; + + (* av_seek_frame() support *) + data_offset: cint64; (**< offset of the first packet *) +{$IFEND} + +{$IF FF_API_MUXRATE} + (** + * use mpeg muxer private options instead + *) + mux_rate: cint; {deprecated} +{$IFEND} + packet_size: cuint; +{$IF FF_API_PRELOAD} + preload: cint; {deprecated} +{$IFEND} + max_delay: cint; + +{$IF FF_API_LOOP_OUTPUT} + (** + * number of times to loop output in formats that support it + * + * @deprecated use the 'loop' private option in the gif muxer. + *) + loop_output: cint; +{$IFEND} + + flags: cint; +{$IF FF_API_LOOP_INPUT} + (** + * @deprecated, use the 'loop' img2 demuxer private option. + *) + loop_input: cint; {deprecated} +{$IFEND} + + (** + * decoding: size of data to probe; encoding: unused. + *) + probesize: cuint; + + (** + * decoding: maximum time (in AV_TIME_BASE units) during which the input should + * be analyzed in avformat_find_stream_info(). + *) + max_analyze_duration: cint; + + key: pbyte; + keylen : cint; + + nb_programs: cuint; + programs: PPAVProgram; + + (** + * Forced video codec_id. + * Demuxing: Set by user. + *) + video_codec_id: TCodecID; + + (** + * Forced audio codec_id. + * Demuxing: Set by user. + *) + audio_codec_id: TCodecID; + + (** + * Forced subtitle codec_id. + * Demuxing: Set by user. + *) + subtitle_codec_id: TCodecID; + + (** + * Maximum amount of memory in bytes to use for the index of each stream. + * If the index exceeds this size, entries will be discarded as + * needed to maintain a smaller size. This can lead to slower or less + * accurate seeking (depends on demuxer). + * Demuxers for which a full in-memory index is mandatory will ignore + * this. + * muxing : unused + * demuxing: set by user + *) + max_index_size: cuint; + + (** + * Maximum amount of memory in bytes to use for buffering frames + * obtained from realtime capture devices. + *) + max_picture_buffer: cuint; + + nb_chapters: cuint; + chapters: PAVChapterArray; + + (** + * Flags to enable debugging. + *) + debug: cint; + +{$IF FF_API_REORDER_PRIVATE} + (** + * 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; +{$IFEND} + + metadata: PAVDictionary; + +{$IF FF_API_REORDER_PRIVATE} + (** + * Remaining size available for raw_packet_buffer, in bytes. + * NOT PART OF PUBLIC API + *) + raw_packet_buffer_remaining_size: cint; +{$IFEND} + + (** + * 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; + + (** + * decoding: number of frames used to probe fps + *) + fps_probe_size: cint; + + (** + * Error recognition; higher values will detect more errors but may + * misdetect some more or less valid parts as errors. + * - encoding: unused + * - decoding: Set by user. + *) + error_recognition: cint; + + (** + * Custom interrupt callbacks for the I/O layer. + * + * decoding: set by the user before avformat_open_input(). + * encoding: set by the user before avformat_write_header() + * (mainly useful for AVFMT_NOFILE formats). The callback + * should also be passed to avio_open2() if it's used to + * open the file. + *) + interrupt_callback: TAVIOInterruptCB; + + (** + * Transport stream id. + * This will be moved into demuxer private options. Thus no API/ABI compatibility + *) + ts_id: cint; + + (** + * Audio preload in microseconds. + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + *) + audio_preload: cint; + + (** + * Max chunk time in microseconds. + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + *) + max_chunk_duration: cint; + + (** + * Max chunk size in bytes + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + *) + max_chunk_size: cint; + + (***************************************************************** + * All fields below this line are not part of the public API. They + * may not be used outside of libavformat and can be changed and + * removed at will. + * New public fields should be added right above. + ***************************************************************** + *) +{$IF NOT FF_API_REORDER_PRIVATE} + (** + * 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; + (** + * Remaining size available for raw_packet_buffer, in bytes. + *) + raw_packet_buffer_remaining_size: cint; + + (** + * 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; + packet_buffer_end_: PAVPacketList; + + (* av_read_frame() support *) + cur_st: PAVStream; + + (* av_seek_frame() support *) + data_offset: cint64; (**< offset of the first packet *) +{$IFEND} + end; + + TAVPacketList = record + pkt: TAVPacket; + next: PAVPacketList; + end; (*AVPacketList*) + +(** + * This function is provided for compatibility reason and currently does nothing. + *) +procedure av_metadata_conv(ctx: PAVFormatContext; {const} d_conv: PAVMetadataConv; {const} s_conv: PAVMetadataConv); + cdecl; external av__format; deprecated; + + +(** + * @defgroup lavf_core Core functions + * @ingroup libavf + * + * Functions for querying libavformat capabilities, allocating core structures, + * etc. + * @{ + *) + +(** + * 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; + +(** + * 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; + +procedure av_register_input_format(format: PAVInputFormat); + cdecl; external av__format; +procedure av_register_output_format(format: PAVOutputFormat); + cdecl; external av__format; + +(** + * Do global initialization of network components. This is optional, + * but recommended, since it avoids the overhead of implicitly + * doing the setup for each session. + * + * Calling this function will become mandatory if using network + * protocols at some major version bump. + *) +function avformat_network_init(): cint; + cdecl; external av__format; + +(** + * Undo the initialization done by avformat_network_init. + *) +function avformat_network_deinit(): cint; + cdecl; 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; + +(** + * 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; + +(** + * Free an AVFormatContext and all its streams. + * @param s context to free + *) +procedure avformat_free_context(s: PAVFormatContext); + cdecl; external av__format; + +(** + * Get the AVClass for AVFormatContext. It can be used in combination with + * AV_OPT_SEARCH_FAKE_OBJ for examining options. + * + * @see av_opt_find(). + *) +function avformat_get_class(): {const} PAVClass; + cdecl; external av__format; + +(** + * Add a new stream to a media file. + * + * When demuxing, it is called by the demuxer in read_header(). If the + * flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also + * be called in read_packet(). + * + * When muxing, should be called by the user before avformat_write_header(). + * + * @param c If non-NULL, the AVCodecContext corresponding to the new stream + * will be initialized to use this codec. This is needed for e.g. codec-specific + * defaults to be set, so codec should be provided if it is known. + * + * @return newly created stream or NULL on error. + *) +function avformat_new_stream(s: PAVFormatContext; c: PAVCodec): PAVStream; + cdecl; external av__format; + +function av_new_program(s: PAVFormatContext; id: cint): PAVProgram; + cdecl; external av__format; + +(** + * @} + *) + +{$IF FF_API_GUESS_IMG2_CODEC} +function av_guess_image2_codec(filename: {const} PAnsiChar): TCodecID; + cdecl; external av__format; +{$IFEND} + +{$IF FF_API_PKT_DUMP} +procedure av_pkt_dump(f: PAVFile; pkt: PAVPacket; dump_payload: cint); {deprecated} + cdecl; external av__format; +procedure av_pkt_dump_log(avcl: Pointer; level: cint; pkt: PAVPacket; dump_payload: cint); {deprecated} + cdecl; external av__format; +{$IFEND} + +{$IF FF_API_ALLOC_OUTPUT_CONTEXT} +(** + * @deprecated deprecated in favor of avformat_alloc_output_context2() + *) +function avformat_alloc_output_context({const} format: PAnsiChar; + oformat: PAVOutputFormat; + {const} filename: PAnsiChar): PAVFormatContext; + cdecl; external av__format; +{$IFEND} + +(** + * Allocate an AVFormatContext for an output format. + * avformat_free_context() can be used to free the context and + * everything allocated by the framework within it. + * + * @param *ctx is set to the created format context, or to NULL in + * case of failure + * @param oformat format to use for allocating the context, if NULL + * format_name and filename are used instead + * @param format_name the name of output format to use for allocating the + * context, if NULL filename is used instead + * @param filename the name of the filename to use for allocating the + * context, may be NULL + * @return >= 0 in case of success, a negative AVERROR code in case of + * failure + *) +function avformat_alloc_output_context2(ctx: PPAVFormatContext; oformat: PAVOutputFormat; + {const} format_name: PAnsiChar; {const} filename: PAnsiChar): cint; + cdecl; external av__format; + +(** + * @addtogroup lavf_decoding + * @{ + *) + +(** + * 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; + +(** + * 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_ret The score of the best detection. + *) +function av_probe_input_format3(pd: PAVProbeData; is_opened: cint; score_ret: Pcint): PAVInputFormat; + cdecl; external av__format; + +{$IF FF_API_FORMAT_PARAMETERS} +(** + * 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; deprecated; + +(** + * 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; deprecated; +{$IFEND} + +(** + * Open an input stream and read the header. The codecs are not opened. + * The stream must be closed with av_close_input_file(). + * + * @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context). + * May be a pointer to NULL, in which case an AVFormatContext is allocated by this + * function and written into ps. + * Note that a user-supplied AVFormatContext will be freed on failure. + * @param filename Name of the stream to open. + * @param fmt If non-NULL, this parameter forces a specific input format. + * Otherwise the format is autodetected. + * @param options A dictionary filled with AVFormatContext and demuxer-private options. + * On return this parameter will be destroyed and replaced with a dict containing + * options that were not found. May be NULL. + * + * @return 0 on success, a negative AVERROR on failure. + * + * @note If you want to use custom IO, preallocate the format context and set its pb field. + *) +function avformat_open_input(ps: PPAVFormatContext; {const} filename: PAnsiChar; fmt: PAVInputFormat; options: PPAVDictionary): cint; + cdecl; external av__format; + +function av_demuxer_open(ic: PAVFormatContext; ap: TAVFormatParameters): cint; + cdecl; external av__format; + +{$IF FF_API_FORMAT_PARAMETERS} +(** + * 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; deprecated; +{$IFEND} + +(** + * 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 + * @param options If non-NULL, an ic.nb_streams long array of pointers to + * dictionaries, where i-th member contains options for + * codec corresponding to i-th stream. + * On return each dictionary will be filled with options that were not found. + * @return >=0 if OK, AVERROR_xxx on error + * + * @note this function isn't guaranteed to open all the codecs, so + * options being non-empty at return is a perfectly normal behavior. + * + * @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 avformat_find_stream_info(ic: PAVFormatContext; options: PPAVDictionary): cint; + cdecl; external av__format; + +(** + * Find the programs which belong to a given stream. + * + * @param ic media file handle + * @param last the last found program, the search will start after this + * program, or from the beginning if it is NULL + * @param s stream index + * @return the next program which belongs to s, NULL if no program is found or + * the last program is not among the programs of ic. + *) +function av_find_program_from_stream(ic: PAVFormatContext; last: PAVProgram; s: cint): PAVProgram; + cdecl; external av__format; + +(** + * Find the "best" stream in the file. + * The best stream is determined according to various heuristics as the most + * likely to be what the user expects. + * If the decoder parameter is non-NULL, av_find_best_stream will find the + * default decoder for the stream's codec; streams for which no decoder can + * be found are ignored. + * + * @param ic media file handle + * @param type stream type: video, audio, subtitles, etc. + * @param wanted_stream_nb user-requested stream number, + * or -1 for automatic selection + * @param related_stream try to find a stream related (eg. in the same + * program) to this one, or -1 if none + * @param decoder_ret if non-NULL, returns the decoder for the + * selected stream + * @param flags flags; none are currently defined + * @return the non-negative stream number in case of success, + * AVERROR_STREAM_NOT_FOUND if no stream with the requested type + * could be found, + * AVERROR_DECODER_NOT_FOUND if streams were found but no decoder + * @note If av_find_best_stream returns successfully and decoder_ret is not + * NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec. + *) +function av_find_best_stream(ic: PAVFormatContext; + type_: TAVMediaType; + wanted_stream_nb: cint; + related_stream: cint; + decoder_ret: PPAVCodec; + flags: cint): 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. + * This function returns what is stored in the file, and does not validate + * that what is there are valid frames for the decoder. It will split what is + * stored in the file into frames and return one for each call. It will not + * omit invalid data between valid frames so as to give the decoder the maximum + * information possible for decoding. + * + * 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 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; + +(** + * 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; + +{$IF FF_API_FORMAT_PARAMETERS} +(** + * Free a AVFormatContext allocated by av_open_input_stream. + * @param s context to free + * @deprecated use av_close_input_file() + *) +procedure av_close_input_stream(s: PAVFormatContext); + cdecl; external av__format; +{$IFEND} + +{$IF FF_API_CLOSE_INPUT_FILE} +(** + * @deprecated use avformat_close_input() + * Close a media file (but not its codecs). + * + * @param s media file handle + *) +procedure av_close_input_file(s: PAVFormatContext); + cdecl; external av__format; +{$IFEND} + +(** + * Close an opened input AVFormatContext. Free it and all its contents + * and set *s to NULL. + *) +procedure avformat_close_input(s: PPAVFormatContext); + cdecl; external av__format; +(** + * @} + *) + +{$IF FF_API_NEW_STREAM} +(** + * 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; +{$IFEND} + +{$IF FF_API_SET_PTS_INFO} +(** + * @deprecated this function is not supposed to be called outside of lavf + *) +procedure av_set_pts_info(s: PAVStream; pts_wrap_bits: cint; + pts_num: cuint; pts_den: cuint); + cdecl; external av__format; +{$IFEND} + +const + AVSEEK_FLAG_BACKWARD = 1; ///< seek backward + AVSEEK_FLAG_BYTE = 2; ///< seeking based on position in bytes + AVSEEK_FLAG_ANY = 4; ///< seek to any frame, even non-keyframes + AVSEEK_FLAG_FRAME = 8; + +{$IF FF_API_SEEK_PUBLIC} +function av_seek_frame_binary(s: PAVFormatContext; stream_index: cint; + target_ts: cint64; flags: cint): cint; + cdecl; external av__format; deprecated; +procedure av_update_cur_dts(s: PAVFormatContext; ref_st: PAVStream; + timestamp: cint64); + cdecl; external av__format; deprecated; + +type + TReadTimestampFunc = function (pavfc: PAVFormatContext; + arg2: cint; arg3: Pint64; arg4: cint64): cint64; cdecl; {deprecated} + +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; deprecated; +{$IFEND} + +{$IF FF_API_FORMAT_PARAMETERS} +(** + * media file output + *) +function av_set_parameters(s: PAVFormatContext; ap: PAVFormatParameters): cint; + cdecl; external av__format; +{$IFEND} + +(** + * @addtogroup lavf_encoding + * @{ + *) +(** + * Allocate the stream private data and write the stream header to + * an output media file. + * + * @param s Media file handle, must be allocated with avformat_alloc_context(). + * Its oformat field must be set to the desired output format; + * Its pb field must be set to an already openened AVIOContext. + * @param options An AVDictionary filled with AVFormatContext and muxer-private options. + * On return this parameter will be destroyed and replaced with a dict containing + * options that were not found. May be NULL. + * + * @return 0 on success, negative AVERROR on failure. + * + * @see av_opt_find, av_dict_set, avio_open, av_oformat_next. + *) +function avformat_write_header(s: PAVFormatContext; options: {PPAVDictionary} pointer): cint; + cdecl; external av__format; + +(** + * Allocate the stream private data and write the stream header to an + * output media file. + * + * @param s media file handle + * @return 0 if OK, AVERROR_xxx on error + *) +{$IF FF_API_FORMAT_PARAMETERS} +(** + * Allocate the stream private data and write the stream header to an + * output media file. + * @note: this sets stream time-bases, if possible to stream->codec->time_base + * but for some formats it might also be some other time base + * + * @param s media file handle + * @return 0 if OK, AVERROR_xxx on error + * + * @deprecated use avformat_write_header. + *) +function av_write_header(s: PAVFormatContext): cint; {deprecated} + cdecl; external av__format; +{$IFEND} + +(** + * 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 containing the data to be written. Libavformat takes + * ownership of the data and will free it when it sees fit using the packet's + * @ref AVPacket.destruct "destruct" field. The caller must not access the data + * after this function returns, as it may already be freed. + * Packet's @ref AVPacket.stream_index "stream_index" field must be set to the + * index of the corresponding stream in @ref AVFormatContext.streams + * "s.streams". + * It is very strongly recommended that timing information (@ref AVPacket.pts + * "pts", @ref AVPacket.dts "dts" @ref AVPacket.duration "duration") is set to + * correct values. + * + * @return 0 on success, a negative AVERROR on error. + *) +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; + +(** + * 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; + +(** + * 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 + *) +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; + +(** + * Get timing information for the data currently output. + * The exact meaning of "currently output" depends on the format. + * It is mostly relevant for devices that have an internal buffer and/or + * work in real time. + * @param s media file handle + * @param stream stream in the media file + * @param dts[out] DTS of the last packet output for the stream, in stream + * time_base units + * @param wall[out] absolute time when that packet whas output, + * in microsecond + * @return 0 if OK, AVERROR(ENOSYS) if the format does not support it + * Note: some formats or devices may not allow to measure dts and wall + * atomically. + *) +function av_get_output_timestamp(s: PAVFormatContext; stream: cint; + dts: Pcint64; wall: Pcint64): cint; + cdecl; external av__format; + + +(** + * @} + *) + + +(** + * @defgroup lavf_misc Utility functions + * @ingroup libavf + * @{ + * + * Miscelaneous utility functions related to both muxing and demuxing + * (or neither). + *) + +(** + * 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_dump2, av_pkt_dump_log2 + *) +procedure av_hex_dump(f: PAVFile; buf: PByteArray; size: cint); {<-?FILE} + 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. + * @param st AVStream that the packet belongs to + *) +procedure av_pkt_dump2(f: PAVFile; pkt: PAVPacket; dump_payload: cint; st: PAVStream); + 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. + * @param st AVStream that the packet belongs to + *) +procedure av_pkt_dump_log2(avcl: pointer; level: cint; pkt: PAVPacket; dump_payload: cint; + st: PAVStream); + 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; + +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; + +(** + * 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; + +(** + * 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; + +{$IF FF_API_DUMP_FORMAT} +(** + * @deprecated Deprecated in favor of av_dump_format(). + *) +procedure dump_format(ic: PAVFormatContext; index: cint; url: PAnsiChar; + is_output: cint); + cdecl; external av__format; deprecated; +{$IFEND} + +procedure av_dump_format(ic: PAVFormatContext; index: cint; url: PAnsiChar; + is_output: cint); + cdecl; external av__format; + +{$IF FF_API_PARSE_DATE} +(** + * Parse datestr and return a corresponding number of microseconds. + * + * @param datestr String representing a date or a duration. + * See av_parse_time() for the syntax of the provided string. + * @deprecated in favor of av_parse_time() + *) +function parse_date(datestr: PAnsiChar; duration: cint): cint64; {deprecated} + cdecl; external av__format; deprecated; +{$IFEND} + +(** + * Get the current time in microseconds. + *) +function av_gettime(): cint64; + cdecl; external av__format; + +{$IF FF_API_FIND_INFO_TAG} +(** + * @deprecated use av_find_info_tag in libavutil instead. + *) +function find_info_tag(arg: PAnsiChar; arg_size: cint; tag1: PAnsiChar; info: PAnsiChar): cint; + cdecl; external av__format; +{$IFEND} + +(** + * Return in 'buf' the path with '%d' replaced by a number. + * + * Also handles the '%0nd' format where 'n' is the total number + * of digits and '%%'. + * + * @param buf destination buffer + * @param buf_size destination buffer size + * @param path numbered sequence string + * @param number frame number + * @return 0 if OK, -1 on format error + *) +function av_get_frame_filename(buf: PAnsiChar; buf_size: cint; + path: PAnsiChar; number: cint): cint; + cdecl; external av__format; + +(** + * Check whether filename actually is a numbered sequence generator. + * + * @param filename possible numbered sequence string + * @return 1 if a valid numbered sequence string, 0 otherwise + *) +function av_filename_number_test(filename: PAnsiChar): cint; + cdecl; external av__format; + +(** + * Generate an SDP for an RTP session. + * + * @param ac array of AVFormatContexts describing the RTP streams. If the + * array is composed by only one context, such context can contain + * multiple AVStreams (one AVStream per RTP stream). Otherwise, + * all the contexts in the array (an AVCodecContext per RTP stream) + * must contain only one AVStream. + * @param n_files number of AVCodecContexts contained in ac + * @param buf buffer where the SDP will be stored (must be allocated by + * the caller) + * @param size the size of the buffer + * @return 0 if OK, AVERROR_xxx on error + *) +function av_sdp_create(ac: pointer; n_files: cint; buf: PAnsiChar; size: cint): cint; + cdecl; external av__format; + +{$IF FF_API_SDP_CREATE} +function avf_sdp_create(ac: PPAVFormatContext; n_files: cint; buff: PByteArray; size: cint): cint; + cdecl; external av__format; +{$IFEND} + +(** + * 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; + +(** + * Test if the given container can store a codec. + * + * @param std_compliance standards compliance level, one of FF_COMPLIANCE_* + * + * @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot. + * A negative number if this information is not available. + *) +function avformat_query_codec(ofmt: PAVOutputFormat; codec_id: TCodecID; std_compliance: cint): cint; + cdecl; external av__format; + +(** + * @defgroup riff_fourcc RIFF FourCCs + * @{ + * Get the tables mapping RIFF FourCCs to libavcodec CodecIDs. The tables are + * meant to be passed to av_codec_get_id()/av_codec_get_tag() as in the + * following code: + * @code + * uint32_t tag = MKTAG('H', '2', '6', '4'); + * const struct AVCodecTag *table[] = { avformat_get_riff_video_tags(), 0 }; + * enum CodecID id = av_codec_get_id(table, tag); + * @endcode + *) +(** + * @return the table mapping RIFF FourCCs for video to libavcodec CodecID. + *) +function avformat_get_riff_video_tags(): {const} PAVCodecTag; + cdecl; external av__format; +(** + * @return the table mapping RIFF FourCCs for audio to CodecID. + *) +function avformat_get_riff_audio_tags(): {const} PAVCodecTag; + cdecl; external av__format; +(** + * @} + *) + +(** + * @} + *) + +implementation + +end. |