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Diffstat (limited to 'src/lib/ffmpeg/avformat.pas')
| -rw-r--r-- | src/lib/ffmpeg/avformat.pas | 1372 |
1 files changed, 1372 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/avformat.pas b/src/lib/ffmpeg/avformat.pas new file mode 100644 index 00000000..93ce60e5 --- /dev/null +++ b/src/lib/ffmpeg/avformat.pas @@ -0,0 +1,1372 @@ +(* + * copyright (c) 2001 Fabrice Bellard + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + *) + +(* + * This is a part of Pascal porting of ffmpeg. + * - Originally by Victor Zinetz for Delphi and Free Pascal on Windows. + * - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT + * in the source codes. + * - Changes and updates by the UltraStar Deluxe Team + *) + +(* + * Conversion of libavformat/avformat.h + * Min. version: 50.5.0 , revision 6577, Sat Oct 7 15:30:46 2006 UTC + * Max. version: 52.20.0, revision 14667, Fri Aug 8 18:40:50 2008 UTC + *) + +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} +{$ENDIF} + +interface + +uses + ctypes, + avcodec, + avutil, + avio, + rational, + UConfig; + +const + (* Max. supported version by this header *) + LIBAVFORMAT_MAX_VERSION_MAJOR = 52; + LIBAVFORMAT_MAX_VERSION_MINOR = 20; + LIBAVFORMAT_MAX_VERSION_RELEASE = 0; + LIBAVFORMAT_MAX_VERSION = (LIBAVFORMAT_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MAX_VERSION_RELEASE * VERSION_RELEASE); + + (* Min. supported version by this header *) + LIBAVFORMAT_MIN_VERSION_MAJOR = 50; + LIBAVFORMAT_MIN_VERSION_MINOR = 5; + LIBAVFORMAT_MIN_VERSION_RELEASE = 0; + LIBAVFORMAT_MIN_VERSION = (LIBAVFORMAT_MIN_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MIN_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MIN_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$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 Warn 'Linked version of libavformat may be unsupported!'} +{$IFEND} + +{$IF LIBAVFORMAT_VERSION >= 52020000} // 52.20.0 +(** + * Returns the LIBAVFORMAT_VERSION_INT constant. + *) +function avformat_version(): cuint; + cdecl; external av__format; +{$IFEND} + + +type + PAVFile = Pointer; + +(* packet functions *) + +type + PAVPacket = ^TAVPacket; + TAVPacket = record + (** + * Presentation time stamp in time_base units. + * This is the time at which the decompressed packet will be presented + * to the user. + * Can be AV_NOPTS_VALUE if it is not stored in the file. + * pts MUST be larger or equal to dts as presentation can not happen before + * decompression, unless one wants to view hex dumps. Some formats misuse + * the terms dts and pts/cts to mean something different, these timestamps + * must be converted to true pts/dts before they are stored in AVPacket. + *) + pts: cint64; + (** + * Decompression time stamp in time_base units. + * This is the time at which the packet is decompressed. + * Can be AV_NOPTS_VALUE if it is not stored in the file. + *) + dts: cint64; + data: PChar; + size: cint; + stream_index: cint; + flags: cint; + duration: cint; ///< presentation duration in time_base units (0 if not available) + destruct: procedure (p: PAVPacket); cdecl; + priv: pointer; + pos: cint64; ///< byte position in stream, -1 if unknown + end; +const + PKT_FLAG_KEY = $0001; + +procedure av_destruct_packet_nofree(var pkt: TAVPacket); + cdecl; external av__format; + +(** + * Default packet destructor. + *) +procedure av_destruct_packet(var pkt: TAVPacket); + cdecl; external av__format; + +(** + * Initialize optional fields of a packet to default values. + * + * @param pkt packet + *) +procedure av_init_packet(var pkt: TAVPacket); +{$IF LIBAVFORMAT_VERSION >= 51012002} // 51.12.2 + cdecl; external av__format; +{$IFEND} + +(** + * Allocate the payload of a packet and initialize its fields to default values. + * + * @param pkt packet + * @param size wanted payload size + * @return 0 if OK. AVERROR_xxx otherwise. + *) +function av_new_packet(var pkt: TAVPacket; size: cint): cint; + cdecl; external av__format; + +(** + * Allocate and read the payload of a packet and initialize its fields to default values. + * + * @param pkt packet + * @param size wanted payload size + * @return >0 (read size) if OK. AVERROR_xxx otherwise. + *) +function av_get_packet(s: PByteIOContext; var pkt: TAVPacket; size: cint): cint; + cdecl; external av__format; + +(** + * @warning This is a hack - the packet memory allocation stuff is broken. The + * packet is allocated if it was not really allocated + *) +function av_dup_packet(pkt: PAVPacket): cint; + cdecl; external av__format; + +(** + * Free a packet + * + * @param pkt packet to free + *) +procedure av_free_packet(pkt: PAVPacket); {$IFDEF HasInline}inline;{$ENDIF} + +(*************************************************) +(* fractional numbers for exact pts handling *) + +type + (** + * the exact value of the fractional number is: 'val + num / den'. + * num is assumed to be such as 0 <= num < den + * @deprecated Use AVRational instead + *) + PAVFrac = ^TAVFrac; + TAVFrac = record + val, num, den: cint64; + end; {deprecated} + +(*************************************************) +(* input/output formats *) + +type + (* this structure contains the data a format has to probe a file *) + TAVProbeData = record + filename: pchar; + buf: pchar; + buf_size: cint; + end; + +const + AVPROBE_SCORE_MAX = 100; ///< max 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 *) + + // 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 pts if missing 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 + + // used by AVStream + MAX_REORDER_DELAY = 4; + + // 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 = $0020; + + // used by TAVFormatContext.debug + FF_FDEBUG_TS = 0001; + +type + PPAVCodecTag = ^PAVCodecTag; + PAVCodecTag = Pointer; + + PPAVFormatContext = ^PAVFormatContext; + PAVFormatContext = ^TAVFormatContext; + + PAVFormatParameters = ^TAVFormatParameters; + + PAVOutputFormat = ^TAVOutputFormat; + PAVProbeData = ^TAVProbeData; + + PAVInputFormat = ^TAVInputFormat; + PAVIndexEntry = ^TAVIndexEntry; + + PAVStream = ^TAVStream; + PAVPacketList = ^TAVPacketList; + + PPAVProgram = ^PAVProgram; + PAVProgram = ^TAVProgram; + + {$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + PAVImageFormat = ^TAVImageFormat; + PAVImageInfo = ^TAVImageInfo; + {$IFEND} + + PAVChapter = ^TAVChapter; + TAVChapter = record + id: cint; ///< Unique id to identify the chapter + time_base: TAVRational; ///< Timebase in which the start/end timestamps are specified + start, end_: cint64; ///< chapter start/end time in time_base units + title: PChar; ///< chapter title + end; + TAVChapterArray = array[0..(MaxInt div SizeOf(TAVChapter))-1] of TAVChapter; + PAVChapterArray = ^TAVChapterArray; + + TAVFormatParameters = record + time_base: TAVRational; + sample_rate: cint; + channels: cint; + width: cint; + height: cint; + pix_fmt: TAVPixelFormat; + {$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + image_format: PAVImageFormat; + {$IFEND} + channel: cint; (* used to select dv channel *) + {$IF LIBAVFORMAT_VERSION_MAJOR < 52} + device: pchar; (* video, audio or DV device, if LIBAVFORMAT_VERSION_INT < (52<<16) *) + {$IFEND} + standard: pchar; (* tv standard, NTSC, PAL, SECAM *) + { Delphi does not support bit fields -> use bf_flags instead + unsigned int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */ + unsigned int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport + stream packet (only meaningful if + mpeg2ts_raw is TRUE) */ + unsigned int initial_pause:1; /**< do not begin to play the stream + immediately (RTSP only) */ + unsigned int prealloced_context:1; + } + bf_flags: byte; // 0:mpeg2ts_raw/1:mpeg2ts_compute_pcr/2:initial_pause/3:prealloced_context + {$IF LIBAVFORMAT_VERSION_MAJOR < 53} + video_codec_id: TCodecID; + audio_codec_id: TCodecID; + {$IFEND} + end; + + TAVOutputFormat = record + name: pchar; + (** + * Descriptive name for the format, meant to be more human-readable + * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro + * to define it. + *) + long_name: pchar; + mime_type: pchar; + extensions: pchar; (*< comma separated filename extensions *) + (* size of private data so that it can be allocated in the wrapper *) + priv_data_size: cint; + (* output support *) + audio_codec: TCodecID; (* default audio codec *) + video_codec: TCodecID; (* default video codec *) + write_header: function (c: PAVFormatContext): cint; cdecl; + write_packet: function (c: PAVFormatContext; pkt: PAVPacket): cint; cdecl; + write_trailer: function (c: PAVFormatContext): cint; cdecl; + (* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER *) + flags: cint; + (* currently only used to set pixel format if not YUV420P *) + set_parameters: function (c: PAVFormatContext; f: PAVFormatParameters): cint; cdecl; + interleave_packet: function (s: PAVFormatContext; out_: PAVPacket; in_: PAVPacket; flush: cint): cint; cdecl; + + {$IF LIBAVFORMAT_VERSION >= 51008000} // 51.8.0 + (** + * list of supported codec_id-codec_tag pairs, ordered by "better choice first" + * the arrays are all CODEC_ID_NONE terminated + *) + codec_tag: {const} PPAVCodecTag; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 51012002} // 51.12.2 + subtitle_codec: TCodecID; (**< default subtitle codec *) + {$IFEND} + + (* private fields *) + next: PAVOutputFormat; + end; + + TAVInputFormat = record + name: pchar; + (** + * Descriptive name for the format, meant to be more human-readable + * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro + * to define it. + *) + long_name: pchar; + (* 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 by 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 + additionnal paramters. Only used in raw format right + now. 'av_new_stream' should be called to create new streams. *) + read_header: function (c: PAVFormatContext; ap: PAVFormatParameters): 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. *) + 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: pchar; + (* 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; + + {$IF LIBAVFORMAT_VERSION >= 51008000} // 51.8.0 + codec_tag: {const} PPAVCodecTag; + {$IFEND} + + (* private fields *) + next: PAVInputFormat; + end; + + TAVStreamParseType = ( + AVSTREAM_PARSE_NONE, + AVSTREAM_PARSE_FULL, (**< full parsing and repack *) + AVSTREAM_PARSE_HEADERS, (**< only parse headers, don't repack *) + AVSTREAM_PARSE_TIMESTAMPS (**< full parsing and interpolation of timestamps for frames not starting on packet boundary *) + ); + + TAVIndexEntry = record + pos: cint64; + timestamp: cint64; + { Delphi doesn't support bitfields -> use flags_size instead + int flags:2; + int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs 32 byte due to possible 8byte align). + } + flags_size: cint; // 0..1: flags, 2..31: size + min_distance: cint; (* min distance between this and the previous keyframe, used to avoid unneeded searching *) + end; + + (** + * Stream structure. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVStream) must not be used outside libav*. + *) + TAVStream = record + index: cint; (* stream index in AVFormatContext *) + id: cint; (* format specific stream id *) + codec: PAVCodecContext; (* codec context *) + (** + * Real base frame rate of the stream. + * This is the lowest frame rate with which all timestamps can be + * represented accurately (it is the least common multiple of all + * frame rates in the stream), Note, this value is just a guess! + * For example if the timebase is 1/90000 and all frames have either + * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1. + *) + r_frame_rate: TAVRational; + priv_data: pointer; + + (* internal data used in av_find_stream_info() *) + first_dts: cint64; + {$IF LIBAVFORMAT_VERSION_MAJOR < 52} + codec_info_nb_frames: cint; + {$IFEND} + + (** encoding: PTS generation when outputing stream *) + pts: TAVFrac; + (** + * This is the fundamental unit of time (in seconds) in terms + * of which frame timestamps are represented. For fixed-fps content, + * timebase should be 1/frame rate and timestamp increments should be + * identically 1. + *) + time_base: TAVRational; + pts_wrap_bits: cint; (* number of bits in pts (used for wrapping control) *) + (* ffmpeg.c private use *) + stream_copy: cint; (**< if set, just copy stream *) + discard: TAVDiscard; ///< selects which packets can be discarded at will and dont need to be demuxed + //FIXME move stuff to a flags field? + (* quality, as it has been removed from AVCodecContext and put in AVVideoFrame + * MN:dunno if thats the right place, for it *) + quality: cfloat; + (** + * Decoding: pts of the first frame of the stream, in stream time base. + * Only set this if you are absolutely 100% sure that the value you set + * it to really is the pts of the first frame. + * This may be undefined (AV_NOPTS_VALUE). + * @note The ASF header does NOT contain a correct start_time the ASF + * demuxer must NOT set this. + *) + start_time: cint64; + (** + * Decoding: duration of the stream, in stream time base. + * If a source file does not specify a duration, but does specify + * a bitrate, this value will be estimates from bit rate and file size. + *) + duration: cint64; + + language: array [0..3] of char; (* ISO 639 3-letter language code (empty string if undefined) *) + + (* av_read_frame() support *) + need_parsing: TAVStreamParseType; + parser: PAVCodecParserContext; + + cur_dts: cint64; + last_IP_duration: cint; + last_IP_pts: cint64; + (* av_seek_frame() support *) + index_entries: PAVIndexEntry; (* only used if the format does not support seeking natively *) + nb_index_entries: cint; + index_entries_allocated_size: cuint; + + nb_frames: cint64; ///< number of frames in this stream if known or 0 + + {$IF LIBAVFORMAT_VERSION >= 50006000} // 50.6.0 + pts_buffer: array [0..MAX_REORDER_DELAY] of cint64; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52006000} // 52.6.0 + filename: PChar; (**< source filename of the stream *) + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52008000} // 52.8.0 + disposition: cint; (**< AV_DISPOSITION_* bitfield *) + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52019000} // 52.19.0 + probe_data: TAVProbeData; + {$IFEND} + end; + + (** + * format I/O context. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVFormatContext) must not be used outside libav*. + *) + TAVFormatContext = record + av_class: PAVClass; (* set by av_alloc_format_context *) + (* can only be iformat or oformat, not both at the same time *) + iformat: PAVInputFormat; + oformat: PAVOutputFormat; + priv_data: pointer; + + {$IF LIBAVFORMAT_VERSION_MAJOR >= 52} + pb: PByteIOContext; + {$ELSE} + pb: TByteIOContext; + {$IFEND} + + nb_streams: cuint; + streams: array [0..MAX_STREAMS - 1] of PAVStream; + filename: array [0..1023] of char; (* input or output filename *) + (* stream info *) + timestamp: cint64; + title: array [0..511] of char; + author: array [0..511] of char; + copyright: array [0..511] of char; + comment: array [0..511] of char; + album: array [0..511] of char; + year: cint; (* ID3 year, 0 if none *) + track: cint; (* track number, 0 if none *) + genre: array [0..31] of char; (* ID3 genre *) + + 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. NEVER set this value directly: it is deduced from the + AVStream values. *) + 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: pbyte; + cur_len: cint; + cur_pkt: TAVPacket; + + (* av_seek_frame() support *) + data_offset: cint64; (* offset of the first packet *) + index_built: cint; + + mux_rate: cint; + packet_size: cint; + preload: cint; + max_delay: cint; + + (* number of times to loop output in formats that support it *) + loop_output: cint; + + flags: cint; + loop_input: cint; + + {$IF LIBAVFORMAT_VERSION >= 50006000} // 50.6.0 + (* decoding: size of data to probe; encoding unused *) + probesize: cuint; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 51009000} // 51.9.0 + (** + * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info() + *) + max_analyze_duration: cint; + + key: pbyte; + keylen : cint; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 51014000} // 51.14.0 + nb_programs: cuint; + programs: PPAVProgram; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52003000} // 52.3.0 + (** + * Forced video codec_id. + * demuxing: set by user + *) + video_codec_id: TCodecID; + (** + * Forced audio codec_id. + * demuxing: set by user + *) + audio_codec_id: TCodecID; + (** + * Forced subtitle codec_id. + * demuxing: set by user + *) + subtitle_codec_id: TCodecID; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0 + (** + * Maximum amount of memory in bytes to use per stream for the index. + * If the needed index exceeds this size entries will be discarded as + * needed to maintain a smaller size. This can lead to slower or less + * accurate seeking (depends on demuxer). + * Demuxers for which a full in memory index is mandatory will ignore + * this. + * muxing : unused + * demuxing: set by user + *) + max_index_size: cuint; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52009000} // 52.9.0 + (** + * Maximum amount of memory in bytes to use for buffering frames + * obtained from real-time capture devices. + *) + max_picture_buffer: cuint; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52014000} // 52.14.0 + nb_chapters: cuint; + chapters: PAVChapterArray; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52016000} // 52.16.0 + (** + * Flags to enable debuging. + *) + debug: cint; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 52019000} // 52.19.0 + (** + * raw packets from the demuxer, prior to parsing and decoding. + * This buffer is used for buffering packets until the codec can + * be identified, as parsing cannot be done without knowing the + * codec. + *) + raw_packet_buffer: PAVPacketList; + raw_packet_buffer_end: PAVPacketList; + + packet_buffer_end: PAVPacketList; + {$IFEND} + 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; + provider_name : PChar; ///< Network name for DVB streams + name : PChar; ///< Service name for DVB streams + flags : cint; + discard : TAVDiscard; ///< selects which program to discard and which to feed to the caller + {$IF LIBAVFORMAT_VERSION >= 51016000} // 51.16.0 + stream_index : PCardinal; + nb_stream_indexes : PCardinal; + {$IFEND} + end; + + TAVPacketList = record + pkt: TAVPacket; + next: PAVPacketList; + end; + +{$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + (* still image support *) + PAVInputImageContext = pointer; {deprecated} + + (* still image support *) + TAVImageInfo = record + pix_fmt: TAVPixelFormat; (* requested pixel format *) + width: cint; (* requested width *) + height: cint; (* requested height *) + interleaved: cint; (* image is interleaved (e.g. interleaved GIF) *) + pict: TAVPicture; (* returned allocated image *) + end; {deprecated} + + TAVImageFormat = record + name: pchar; + extensions: pchar; + (* tell if a given file has a chance of being parsing by this format *) + img_probe: function (d: PAVProbeData): cint; cdecl; + (* read a whole image. 'alloc_cb' is called when the image size is + known so that the caller can allocate the image. If 'allo_cb' + returns non zero, then the parsing is aborted. Return '0' if + OK. *) + img_read: function (b: PByteIOContext; alloc_cb: pointer; ptr: pointer): cint; cdecl; + (* write the image *) + supported_pixel_formats: cint; (* mask of supported formats for output *) + img_write: function (b: PByteIOContext; i: PAVImageInfo): cint; cdecl; + flags: cint; + next: PAVImageFormat; + end; {deprecated} + +procedure av_register_image_format(img_fmt: PAVImageFormat); + cdecl; external av__format; deprecated; + +function av_probe_image_format(pd: PAVProbeData): PAVImageFormat; + cdecl; external av__format; deprecated; + +function guess_image_format(filename: pchar): PAVImageFormat; + cdecl; external av__format; deprecated; + +function av_read_image(pb: PByteIOContext; filename: pchar; + fmt: PAVImageFormat; + alloc_cb: pointer; opaque: pointer): cint; + cdecl; external av__format; deprecated; + +function av_write_image(pb: PByteIOContext; fmt: PAVImageFormat; img: PAVImageInfo): cint; + cdecl; external av__format; deprecated; +{$IFEND} + +{$IF LIBAVFORMAT_VERSION_MAJOR < 53} +{ +var + first_iformat: PAVInputFormat; external av__format; + first_oformat: PAVOutputFormat; external av__format; +} +{$IFEND} + +{$IF LIBAVFORMAT_VERSION >= 52003000} // 52.3.0 +function av_iformat_next(f: PAVInputFormat): PAVInputFormat; + cdecl; external av__format; +function av_oformat_next(f: PAVOutputFormat): PAVOutputFormat; + cdecl; external av__format; +{$IFEND} + +function av_guess_image2_codec(filename: {const} PChar): 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: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; + cdecl; external av__format; + +function guess_format(short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; + cdecl; external av__format; + +(** + * Guesses the codec id based upon muxer and filename. + *) +function av_guess_codec(fmt: PAVOutputFormat; short_name: pchar; + filename: pchar; mime_type: pchar; 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: pchar; size: cint); + cdecl; external av__format; + +{$IF LIBAVFORMAT_VERSION >= 51011000} // 51.11.0 +(** + * Send a nice hexadecimal dump of a buffer to the log. + * + * @param avcl A pointer to an arbitrary struct of which the first field is a + * pointer to an AVClass struct. + * @param level The importance level of the message, lower values signifying + * higher importance. + * @param buf buffer + * @param size buffer size + * + * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log + *) +procedure av_hex_dump_log(avcl: Pointer; level: cint; buf: PChar; size: cint); + cdecl; external av__format; +{$IFEND} + +(** + * 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; + +{$IF LIBAVFORMAT_VERSION >= 51011000} // 51.11.0 +(** + * Send a nice dump of a packet to the log. + * + * @param avcl A pointer to an arbitrary struct of which the first field is a + * pointer to an AVClass struct. + * @param level The importance level of the message, lower values signifying + * higher importance. + * @param pkt packet to dump + * @param dump_payload true if the payload must be displayed too + *) +procedure av_pkt_dump_log(avcl: Pointer; level: cint; pkt: PAVPacket; dump_payload: cint); + cdecl; external av__format; +{$IFEND} + +procedure av_register_all(); + cdecl; external av__format; + +{$IF LIBAVFORMAT_VERSION >= 51008000} // 51.8.0 +(** codec tag <-> codec id *) +function av_codec_get_id(var tags: PAVCodecTag; tag: cuint): TCodecID; + cdecl; external av__format; +function av_codec_get_tag(var tags: PAVCodecTag; id: TCodecID): cuint; + cdecl; external av__format; +{$IFEND} + +(* media file input *) + +(** + * finds AVInputFormat based on input format's short name. + *) +function av_find_input_format(short_name: pchar): 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; + +(** + * Allocates 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(ic_ptr: PAVFormatContext; + pb: PByteIOContext; filename: pchar; + 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: pchar; + 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 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 frame rate in case of mpeg2 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 if error. + * @todo Let user decide somehow what information is needed so 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 if 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.timebase units (and guessed if the format cannot + * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format + * has B frames, so it is better to rely on pkt->dts if you do not + * decompress the payload. + * + * @return 0 if OK, < 0 if error or end of file. + *) +function av_read_frame(s: PAVFormatContext; var pkt: TAVPacket): cint; + cdecl; external av__format; + +(** + * Seek to the key frame 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 there is no stream specified then 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; + +{$IF LIBAVFORMAT_VERSION >= 52003000} // 52.3.0 +(** + * Free a AVFormatContext allocated by av_open_input_stream. + * @param s context to free + *) +procedure av_close_input_stream(s: PAVFormatContext); + cdecl; external av__format; +{$IFEND} + +(** + * 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; +{$IF LIBAVFORMAT_VERSION >= 51014000} // 51.14.0 +function av_new_program(s: PAVFormatContext; id: cint): PAVProgram; + cdecl; external av__format; +{$IFEND} + +{$IF LIBAVFORMAT_VERSION >= 52014000} // 52.14.0 +(** + * Add a new chapter. + * This function is NOT part of the public API + * and should be ONLY used by demuxers. + * + * @param s media file handle + * @param id unique id for this chapter + * @param start chapter start time in time_base units + * @param end chapter end time in time_base units + * @param title chapter title + * + * @return AVChapter or NULL if error. + *) +function ff_new_chapter(s: PAVFormatContext; id: cint; time_base: TAVRational; start, end_: cint64; title: {const} Pchar): PAVChapter; + cdecl; external av__format; +{$IFEND} + +(** + * 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: cint; pts_den: cint); + cdecl; external av__format; + +const + AVSEEK_FLAG_BACKWARD = 1; ///< seek backward + AVSEEK_FLAG_BYTE = 2; ///< seeking based on position in bytes + AVSEEK_FLAG_ANY = 4; ///< seek to any frame, even non keyframes + +function av_find_default_stream_index(s: PAVFormatContext): cint; + cdecl; external av__format; + +(** + * Gets 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; + +{$IF LIBAVFORMAT_VERSION >= 52004000} // 52.4.0 +(** + * Ensures the index uses less memory than the maximum specified in + * AVFormatContext.max_index_size, by discarding entries if it grows + * too large. + * This function is not part of the public API and should only be called + * by demuxers. + *) +procedure ff_reduce_index(s: PAVFormatContext; stream_index: cint); + cdecl; external av__format; +{$IFEND} + +(** + * Add a index entry into a sorted list updateing if it is already there. + * + * @param timestamp timestamp in the timebase of the given stream + *) +function av_add_index_entry(st: PAVStream; pos: cint64; timestamp: cint64; + distance: cint; flags: cint): cint; + cdecl; external av__format; + +(** + * Does a binary search using av_index_search_timestamp() and AVCodec.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; + + +(** + * Updates cur_dts of all streams based on given timestamp and AVStream. + * + * Stream ref_st unchanged, others set cur_dts in their native timebase + * 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; + +{$IF LIBAVFORMAT_VERSION >= 51007000} // 51.7.0 +type + TReadTimestampFunc = function (pavfc: PAVFormatContext; + arg2: cint; arg3: Pint64; arg4: cint64): cint64; cdecl; + +(** + * Does a binary search using read_timestamp(). + * This is not supposed to be called directly by a user application, but by demuxers. + * @param target_ts target timestamp in the time base of the given stream + * @param stream_index stream number + *) +function av_gen_search(s: PAVFormatContext; stream_index: cint; target_ts: cint64; + pos_min: cint64; pos_max: cint64; pos_limit: cint64; ts_min: cint64; ts_max: cint64; + flags: cint; ts_ret: Pint64; read_timestamp: TReadTimestampFunc): cint64; + cdecl; external av__format; +{$IFEND} + +(* media file output *) +function av_set_parameters(s: PAVFormatContext; ap: PAVFormatParameters): 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 if 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 if error, = 0 if OK, 1 if end of stream wanted. + *) +function av_write_frame(s: PAVFormatContext; var pkt: TAVPacket): cint; + cdecl; external av__format; + +(** + * Writes 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 if 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 calling av_free_packet() on them is still safe. + * + * @param s media file handle + * @param out the interleaved packet will be output here + * @param in 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; + +(** + * @brief Write the stream trailer to an output media file and + * free the file private data. + * + * @param s media file handle + * @return 0 if OK. AVERROR_xxx if error. + *) +function av_write_trailer(s: pAVFormatContext): cint; + cdecl; external av__format; + +procedure dump_format(ic: PAVFormatContext; index: cint; url: pchar; + is_output: cint); + cdecl; external av__format; + +(** + * parses 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: pchar): cint; + cdecl; external av__format; deprecated; + +(** + * Converts frame rate from string to a fraction. + * @deprecated Use av_parse_video_frame_rate instead. + *) +function parse_frame_rate(frame_rate: PCint; frame_rate_base: PCint; arg: pchar): cint; + cdecl; external av__format; deprecated; + +(** + * Parses \p datestr and returns a corresponding number of microseconds. + * @param datestr String representing a date or a duration. + * - If a date the syntax is: + * @code + * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]} + * @endcode + * Time is localtime unless Z is appended, in which case it is + * interpreted as UTC. + * If the year-month-day part isn't 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 \p datestr cannot be + * successfully parsed. + * - If a duration the syntax is: + * @code + * [-]HH[:MM[:SS[.m...]]] + * [-]S+[.m...] + * @endcode + * Returns the number of microseconds contained in a time interval + * with the specified duration or INT64_MIN if \p datestr cannot be + * successfully parsed. + * @param duration Flag which tells how to interpret \p datestr, if + * not zero \p datestr is interpreted as a duration, otherwise as a + * date. + *) +function parse_date(datestr: pchar; duration: cint): cint64; + cdecl; external av__format; + +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; + +procedure ffm_write_write_index(fd: cint; pos: cint64); + cdecl; external av__format; + +procedure ffm_set_write_index(s: PAVFormatContext; pos: cint64; file_size: cint64); + cdecl; external av__format; + +(** + * Attempts 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: pchar; arg_size: cint; tag1: pchar; info: pchar): cint; + cdecl; external av__format; + +(** + * Returns in 'buf' the path with '%d' replaced by 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 if format error. + *) +function av_get_frame_filename(buf: pchar; buf_size: cint; + path: pchar; number: cint): cint; + cdecl; external av__format + {$IF LIBAVFORMAT_VERSION <= 50006000} // 50.6.0 + name 'get_frame_filename' + {$IFEND}; + +(** + * 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: pchar): cint; + cdecl; external av__format + {$IF LIBAVFORMAT_VERSION <= 50006000} // 50.6.0 + name 'filename_number_test' + {$IFEND}; + +{$IF LIBAVFORMAT_VERSION >= 51012002} // 51.12.2 +(** + * Generate an SDP for an RTP session. + * + * @param ac array of AVFormatContexts describing the RTP streams. If the + * array is composed by only one context, such context can contain + * multiple AVStreams (one AVStream per RTP stream). Otherwise, + * all the contexts in the array (an AVCodecContext per RTP stream) + * must contain only one AVStream + * @param n_files number of AVCodecContexts contained in ac + * @param buff buffer where the SDP will be stored (must be allocated by + * the caller + * @param size the size of the buffer + * @return 0 if OK. AVERROR_xxx if error. + *) +function avf_sdp_create(ac: PPAVFormatContext; n_files: cint; buff: PChar; size: cint): cint; + cdecl; external av__format; +{$IFEND} + +implementation + +{$IF LIBAVFORMAT_VERSION < 51012002} // 51.12.2 +procedure av_init_packet(var pkt: TAVPacket); +begin + with pkt do begin + pts := AV_NOPTS_VALUE; + dts := AV_NOPTS_VALUE; + pos := -1; + duration := 0; + flags := 0; + stream_index := 0; + destruct := @av_destruct_packet_nofree + end +end; +{$IFEND} + +procedure av_free_packet(pkt: PAVPacket); +begin + if ((pkt <> nil) and (@pkt^.destruct <> nil)) then + pkt^.destruct(pkt); +end; + +end. |