diff options
Diffstat (limited to '')
| -rw-r--r-- | Game/Code/lib/ffmpeg/avformat.pas | 1174 |
1 files changed, 853 insertions, 321 deletions
diff --git a/Game/Code/lib/ffmpeg/avformat.pas b/Game/Code/lib/ffmpeg/avformat.pas index bcd7861c..41d964bb 100644 --- a/Game/Code/lib/ffmpeg/avformat.pas +++ b/Game/Code/lib/ffmpeg/avformat.pas @@ -1,188 +1,298 @@ - (* +(* * copyright (c) 2001 Fabrice Bellard * - * This library is free software; you can redistribute it and/or + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * 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 this library; if not, write to the Free Software + * 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 *) + * For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT + * in the source codes *) + +// Min. version: 50.5.0 +// Max. version: 52.5.0, Revision: 11574 unit avformat; {$IFDEF FPC} - {$IFDEF LINUX} - {$LINKLIB libavutil} - {$LINKLIB libavformat} - {$ENDIF} - - {$MODE DELPHI } (* CAT *) - {$PACKENUM 4} (* every enum type variables uses 4 bytes, CAT *) - {$PACKRECORDS C} (* GCC compatible, Record Packing, CAT *) + {$MODE DELPHI } + {$PACKENUM 4} (* use 4-byte enums *) + {$PACKRECORDS C} (* C/C++-compatible record packing *) +{$ELSE} + {$MINENUMSIZE 4} (* use 4-byte enums *) {$ENDIF} interface uses avcodec, + avutil, avio, rational, - avutil; (* CAT *) - -{$I version.inc} + UConfig; const - MAXINT64 = $7fffffffffffffff; - MININT64 = $8000000000000000; + (* Max. supported version by this header *) + LIBAVFORMAT_MAX_VERSION_MAJOR = 52; + LIBAVFORMAT_MAX_VERSION_MINOR = 5; + LIBAVFORMAT_MAX_VERSION_RELEASE = 0; + LIBAVFORMAT_MAX_VERSION = (LIBAVFORMAT_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVFORMAT_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVFORMAT_MAX_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$IF (LIBAVFORMAT_VERSION > LIBAVFORMAT_MAX_VERSION)} + {$MESSAGE Warn 'Linked version of libavformat may be unsupported!'} +{$IFEND} + +type + PAVFile = Pointer; +(* packet functions *) + +type + PAVPacket = ^TAVPacket; + TAVPacket = record + pts: int64; ///< presentation time stamp in time_base units + dts: int64; ///< decompression time stamp in time_base units + data: PByte; + size: integer; + stream_index: integer; + flags: integer; + duration: integer; ///< presentation duration in time_base units (0 if not available) + destruct: procedure (p: PAVPacket); cdecl; + priv: pointer; + pos: int64; ///< 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: integer): integer; + 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: integer): integer; + 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): integer; + cdecl; external av__format; + +(** + * Free a packet + * + * @param pkt packet to free + *) +procedure av_free_packet (pkt: PAVPacket); inline; + +(*************************************************) +(* 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: int64; + 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: integer; + 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 + //! 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_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; - MAX_REORDER_DELAY = 4; - 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 = $0004; ///< do not block when reading packets from input + // used by AVStream + MAX_REORDER_DELAY = 4; + + // used by TAVProgram + AV_PROGRAM_RUNNING = 1; + type - HFILE = THandle; /// (* CAT *) - int = integer; + PPAVCodecTag = ^PAVCodecTag; + PAVCodecTag = Pointer; - PAVPacket = ^TAVPacket; - PAVImageFormat = ^TAVImageFormat; + PPAVFormatContext = ^PAVFormatContext; PAVFormatContext = ^TAVFormatContext; + PAVFormatParameters = ^TAVFormatParameters; + PAVOutputFormat = ^TAVOutputFormat; PAVProbeData = ^TAVProbeData; + PAVInputFormat = ^TAVInputFormat; PAVIndexEntry = ^TAVIndexEntry; + PAVStream = ^TAVStream; PAVPacketList = ^TAVPacketList; - PAVImageInfo = ^TAVImageInfo; - TAVPacket = record {56} - pts: int64; ///< presentation time stamp in time_base units - dts: int64; ///< decompression time stamp in time_base units - data: PByte; - size: integer; - stream_index: integer; - flags: integer; - duration: integer; ///< presentation duration in time_base units (0 if not available) - destruct: procedure (p: PAVPacket); cdecl; (* This cannot be var : TAVPacket. - because TAVPacket is not completely defined yet *) - priv: pointer; - pos: int64 ///< byte position in stream, -1 if unknown - end; - -(*************************************************) -(* fractional numbers for exact pts handling *) - -(* the exact value of the fractional number is: 'val + num / den'. num - is assumed to be such as 0 <= num < den *) - PAVFrac = ^TAVFrac; - TAVFrac = record - val, num, den: int64; - end; + PPAVProgram = ^PAVProgram; + PAVProgram = ^TAVProgram; -(* this structure contains the data a format has to probe a file *) - TAVProbeData = record {12} - filename: pchar; - buf: pchar; - buf_size: integer; - end; + {$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + PAVImageFormat = ^TAVImageFormat; + PAVImageInfo = ^TAVImageInfo; + {$IFEND} - TAVFormatParameters = record {56} - time_base: TAVRational; (* 8 bytes *) + TAVFormatParameters = record + time_base: TAVRational; sample_rate: integer; channels: integer; width: integer; height: integer; pix_fmt: TAVPixelFormat; -{ image_format: PAVImageFormat; (* 4 bytes *)} (* CAT#3 *) + {$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + image_format: PAVImageFormat; + {$IFEND} channel: integer; (* used to select dv channel *) + {$IF LIBAVFORMAT_VERSION_MAJOR < 52} device: pchar; (* video, audio or DV device, if LIBAVFORMAT_VERSION_INT < (52<<16) *) + {$IFEND} standard: pchar; (* tv standard, NTSC, PAL, SECAM *) -// int mpeg2ts_raw:1; (* force raw MPEG2 transport stream output, if possible *) -// int mpeg2ts_compute_pcr:1; (* compute exact PCR for each transport -// stream packet (only meaningful if -// mpeg2ts_raw is TRUE *) -// int initial_pause:1; (* do not begin to play the stream -// immediately (RTSP only) *) -// int prealloced_context:1; - dummy: byte; + { Delphi does not support bit fields -> use bf_flags instead + int mpeg2ts_raw:1; (* force raw MPEG2 transport stream output, if possible *) + int mpeg2ts_compute_pcr:1; (* compute exact PCR for each transport + stream packet (only meaningful if + mpeg2ts_raw is TRUE *) + int initial_pause:1; (* do not begin to play the stream + immediately (RTSP only) *) + int prealloced_context:1; + } + bf_flags: byte; // 0:mpeg2ts_raw/1:mpeg2ts_compute_pcr/2:initial_pause/3:prealloced_context + {$IF LIBAVFORMAT_VERSION_MAJOR < 53} video_codec_id: TCodecID; audio_codec_id: TCodecID; + {$IFEND} end; - TAVOutputFormat = record {56} + TAVOutputFormat = record name: pchar; long_name: pchar; mime_type: pchar; - extensions: pchar; (* comma separated extensions *) + extensions: pchar; (*< comma separated filename extensions *) (* size of private data so that it can be allocated in the wrapper *) priv_data_size: integer; (* output support *) audio_codec: TCodecID; (* default audio codec *) video_codec: TCodecID; (* default video codec *) write_header: function (c: PAVFormatContext): integer; cdecl; - write_packet: function (c: PAVFormatContext; var pkt: TAVPacket): integer; cdecl; (* CAT#2 *) + write_packet: function (c: PAVFormatContext; pkt: PAVPacket): integer; cdecl; write_trailer: function (c: PAVFormatContext): integer; cdecl; (* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER *) flags: integer; (* currently only used to set pixel format if not YUV420P *) set_parameters: function (c: PAVFormatContext; f: PAVFormatParameters): integer; cdecl; - interleave_packet: function (s: PAVFormatContext; _out: PAVPacket; _in: PAVPacket; flush: integer): integer; cdecl; + interleave_packet: function (s: PAVFormatContext; out_: PAVPacket; in_: PAVPacket; flush: integer): integer; cdecl; + {$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 *) - //const struct AVCodecTag **codec_tag; + 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 {60} + TAVInputFormat = record name: pchar; long_name: pchar; (* size of private data so that it can be allocated in the wrapper *) priv_data_size: integer; - (* tell if a given file has a chance of being parsing by this format *) + (** + * 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): integer; cdecl; (* read the format header and initialize the AVFormatContext structure. Return 0 if OK. 'ap' if non NULL contains @@ -196,16 +306,22 @@ type (* close the stream. The AVFormatContext and AVStreams are not freed by this function *) read_close: function (c: PAVFormatContext): integer; cdecl; - (*** seek to a given timestamp relative to the frames in + (** + * 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 *) + * match is available + * @return >= 0 on success (but not necessarily the new offset) + *) read_seek: function (c: PAVFormatContext; stream_index: integer; timestamp: int64; flags: integer): integer; cdecl; - (*** gets the next timestamp in AV_TIME_BASE units. *) + (** + * gets the next timestamp in stream[stream_index].time_base units. + * @return the timestamp or AV_NOPTS_VALUE if an error occured + *) read_timestamp: function (s: PAVFormatContext; stream_index: integer; - pos: pint64; pos_limit: int64): integer; cdecl; + pos: pint64; pos_limit: int64): int64; cdecl; (* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER *) flags: integer; (* if extensions are defined, then no probe is done. You should @@ -221,7 +337,9 @@ type (* pause playing - only meaningful if using a network based format (RTSP) *) read_pause: function (c: PAVFormatContext): integer; cdecl; - //const struct AVCodecTag **codec_tag; + {$IF LIBAVFORMAT_VERSION >= 51008000} // 51.8.0 + codec_tag: {const} PPAVCodecTag; + {$IFEND} (* private fields *) next: PAVInputFormat; @@ -232,55 +350,84 @@ type 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 {24} + TAVIndexEntry = record pos: int64; timestamp: int64; -(* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed *) - flags: integer; -// 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). + { 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: cardinal; // 0..1: flags, 2..31: size min_distance: integer; (* min distance between this and the previous keyframe, used to avoid unneeded searching *) end; - TAVStream = record {168} - index: integer; (* stream index in AVFormatContext *) {4-4} - id: integer; (* format specific stream id *) {4-8} - codec: PAVCodecContext; (* codec context *) {4-12} - (*** real base frame rate of the stream. - * for example if the timebase is 1/90000 and all frames have either - * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1 *) - r_frame_rate: TAVRational; {4*2=8-20} - priv_data: pointer; {4-24} + (** + * 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: integer; (* stream index in AVFormatContext *) + id: integer; (* 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() *) - codec_info_duration: int64; (* #if LIBAVFORMAT_VERSION_INT < (52<<16) *) {8-32} - codec_info_nb_frames: integer; (* #if LIBAVFORMAT_VERSION_INT < (52<<16) *) {4-38} - (* encoding: PTS generation when outputing stream *) - pts: TAVFrac; {8*3=24-62} - - (*** this is the fundamental unit of time (in seconds) in terms - * of which frame timestamps are represented. for fixed-fps content, - * timebase should be 1/framerate and timestamp increments should be - * identically 1. *) - time_base: TAVRational; {4*2=8-70} - pts_wrap_bits: integer; (* number of bits in pts (used for wrapping control) *) {4-74} + first_dts: int64; + {$IF LIBAVFORMAT_VERSION_MAJOR < 52} + codec_info_nb_frames: integer; + {$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: integer; (* number of bits in pts (used for wrapping control) *) (* ffmpeg.c private use *) - stream_copy: integer; (* if TRUE, just copy stream *) {4-78} - discard: TAVDiscard; ///< selects which packets can be discarded at will and dont need to be demuxed {4-82} + stream_copy: integer; (**< 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: single; {4-86} - (* decoding: position of the first frame of the component, in AV_TIME_BASE fractional seconds. *) - start_time: int64; {8-92} - (* decoding: duration of the stream, in stream time base. *) - duration: int64; {8-100} + quality: single; + (** + * 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: int64; + (** + * 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: int64; - language: array [0..3] of char; (* ISO 639 3-letter language code (empty string if undefined) *)(* 101 th byte - 1 base *) {4-104} + language: array [0..3] of char; (* ISO 639 3-letter language code (empty string if undefined) *) (* av_read_frame() support *) - need_parsing: TAVStreamParseType;//CAT#3 ///< 1->full parsing needed, 2->only parse headers dont repack + need_parsing: TAVStreamParseType; parser: PAVCodecParserContext; cur_dts: int64; @@ -289,27 +436,35 @@ type (* av_seek_frame() support *) index_entries: PAVIndexEntry; (* only used if the format does not support seeking natively *) nb_index_entries: integer; - index_entries_allocated_size: cardinal; (* CAT#3 *) + index_entries_allocated_size: cardinal; nb_frames: int64; ///< 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 int64 + {$IFEND} end; -(* format I/O context *) - TAVFormatContext = record {3960} + (** + * format I/O context. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVFormatContext) must not be used outside libav*. + *) + TAVFormatContext = record av_class: PAVClass; (* set by av_alloc_format_context *) (* can only be iformat or oformat, not both at the same time *) iformat: PAVInputFormat; oformat: PAVOutputFormat; priv_data: pointer; - {$IF (LIBAVFORMAT_MAJOR_VERSION >= 52)} + {$IF LIBAVFORMAT_VERSION_MAJOR >= 52} pb: PByteIOContext; {$ELSE} pb: TByteIOContext; {$IFEND} - nb_streams: cardinal; (* CAT#3 *) + nb_streams: cardinal; streams: array [0..MAX_STREAMS - 1] of PAVStream; filename: array [0..1023] of char; (* input or output filename *) (* stream info *) @@ -365,37 +520,97 @@ type flags: integer; loop_input: integer; + + {$IF LIBAVFORMAT_VERSION >= 50006000} // 50.6.0 (* decoding: size of data to probe; encoding unused *) probesize: cardinal; + {$IFEND} + {$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: integer; key: pbyte; - keylen : integer + keylen : integer; + {$IFEND} + + {$IF LIBAVFORMAT_VERSION >= 51014000} // 51.14.0 + nb_programs: cardinal; + 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: cardinal; + {$IFEND} end; - TAVPacketList = record {64} + (** + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVProgram) must not be used outside libav*. + *) + TAVProgram = record + id : integer; + provider_name : PChar; ///< Network name for DVB streams + name : PChar; ///< Service name for DVB streams + flags : integer; + discard : TAVDiscard; ///< selects which program to discard and which to feed to the caller + {$IF LIBAVFORMAT_VERSION >= 51016000} // 51.16.0 + stream_index : PCardinal; + nb_stream_indexes : PCardinal; + {$IFEND} + end; + + TAVPacketList = record pkt: TAVPacket; next: PAVPacketList; end; -(* still image support *) - PAVInputImageContext = pointer; // attribute_deprecated; -// PAVInputImageContext = pointer; //AVInputImageContext attribute_deprecated; +{$IF LIBAVFORMAT_VERSION < 51006000} // 51.6.0 + (* still image support *) + PAVInputImageContext = pointer; {deprecated} -(* still image support *) - TAVImageInfo = record {48} + (* still image support *) + TAVImageInfo = record pix_fmt: TAVPixelFormat; (* requested pixel format *) width: integer; (* requested width *) height: integer; (* requested height *) interleaved: integer; (* image is interleaved (e.g. interleaved GIF) *) pict: TAVPicture; (* returned allocated image *) - end; + end; {deprecated} - TAVImageFormat = record {32} + TAVImageFormat = record name: pchar; extensions: pchar; (* tell if a given file has a chance of being parsing by this format *) @@ -410,134 +625,212 @@ type img_write: function (b: PByteIOContext; i: PAVImageInfo): integer; cdecl; flags: integer; next: PAVImageFormat; - end; - -procedure av_destruct_packet_nofree (var pkt: TAVPacket); (* CAT#2 *) - cdecl; external av__format; -procedure av_destruct_packet (var pkt: TAVPacket); (* CAT#2 *) - cdecl; external av__format; - -(* initialize optional fields of a packet *) -procedure av_init_packet (var pkt: TAVPacket); (* CAT#2 *) - -function av_new_packet(var pkt: TAVPacket; size: integer): integer; (* CAT#2 *) - cdecl; external av__format; - -function av_get_packet (s: PByteIOContext; var pkt: TAVPacket; size: integer): integer; (* CAT#2 *) - cdecl; external av__format; - -function av_dup_packet (pkt: PAVPacket): integer; - cdecl; external av__format; - -(** * Free a packet - * - * @param pkt packet to free *) -procedure av_free_packet (var pkt: TAVPacket); (* CAT#2 *) + end; {deprecated} procedure av_register_image_format (img_fmt: PAVImageFormat); - cdecl; external av__format; + cdecl; external av__format; deprecated; function av_probe_image_format (pd: PAVProbeData): PAVImageFormat; - cdecl; external av__format; + cdecl; external av__format; deprecated; function guess_image_format (filename: pchar): PAVImageFormat; - cdecl; external av__format; - -function av_guess_image2_codec(filename: pchar): TCodecID; - cdecl; external av__format; + cdecl; external av__format; deprecated; function av_read_image (pb: PByteIOContext; filename: pchar; fmt: PAVImageFormat; alloc_cb: pointer; opaque: pointer): integer; - cdecl; external av__format; + cdecl; external av__format; deprecated; function av_write_image(pb: PByteIOContext; fmt: PAVImageFormat; img: PAVImageInfo): integer; + 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; +{$IFEND} + +function av_guess_image2_codec({const} filename: PChar): TCodecID; cdecl; external av__format; (* XXX: use automatic init with either ELF sections or C file parser *) (* modules *) -//#include "rtp.h" +(* utils.c *) +procedure av_register_input_format (format: PAVInputFormat); + cdecl; external av__format; -//#include "rtsp.h" +procedure av_register_output_format (format: PAVOutputFormat); + cdecl; external av__format; -(* utils.c *) - procedure av_register_input_format (format: PAVInputFormat); - cdecl; external av__format; +function guess_stream_format (short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; + cdecl; external av__format; - procedure av_register_output_format (format: PAVOutputFormat); - cdecl; external av__format; +function guess_format(short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; + cdecl; external av__format; - function guess_stream_format (short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; - cdecl; external av__format; +(** + * Guesses the codec id based upon muxer and filename. + *) +function av_guess_codec(fmt: PAVOutputFormat; short_name: pchar; + filename: pchar; mime_type: pchar; type_: TCodecType): TCodecID; + cdecl; external av__format; - function guess_format(short_name: pchar; filename: pchar; mime_type: pchar): PAVOutputFormat; - cdecl; external av__format; +(** + * Send a nice hexadecimal dump of a buffer to the specified file stream. + * + * @param f The file stream pointer where the dump should be sent to. + * @param buf buffer + * @param size buffer size + * + * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log + *) +procedure av_hex_dump (f: PAVFile; buf: pchar; size: integer); + cdecl; external av__format; - function av_guess_codec(fmt: PAVOutputFormat; short_name: pchar; - filename: pchar; mime_type: pchar; _type: TCodecType): TCodecID; - cdecl; external av__format; +{$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: integer; buf: PChar; size: integer); + cdecl; external av__format; +{$IFEND} - procedure av_hex_dump (f: HFILE; buf: pchar; size: integer); - cdecl; external av__format; - procedure av_pkt_dump(f: HFILE; var pkt: TAVPacket; dump_payload: integer); (* CAT#2 *) - cdecl; external av__format; +(** + * Send a nice dump of a packet to the specified file stream. + * + * @param f The file stream pointer where the dump should be sent to. + * @param pkt packet to dump + * @param dump_payload true if the payload must be displayed too + *) +procedure av_pkt_dump(f: PAVFile; pkt: PAVPacket; dump_payload: integer); + cdecl; external av__format; - procedure av_register_all (); - cdecl; external av__format; +{$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: integer; pkt: PAVPacket; dump_payload: integer); + 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: cardinal): TCodecID; + cdecl; external av__format; +function av_codec_get_tag(var tags: PAVCodecTag; id: TCodecID): cardinal; + cdecl; external av__format; +{$IFEND} (* media file input *) - function av_find_input_format (short_name: pchar): PAVInputFormat; - cdecl; external av__format; - function av_probe_input_format (pd: PAVProbeData; is_opened: integer): PAVInputFormat; - cdecl; external av__format; - function av_open_input_stream (ic_ptr: PAVFormatContext; - pb: PByteIOContext; filename: pchar; - fmt: PAVInputFormat; ap: PAVFormatParameters): integer; - cdecl; external av__format; -(*** Open a media file as input. The codec are not opened. Only the file + +(** + * 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: integer): 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): integer; + 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 additionnal parameters needed when opening the file (NULL if default) - * @return 0 if OK. AVERROR_xxx otherwise. *) - - function av_open_input_file (var ic_ptr: PAVFormatContext; filename: pchar; - fmt: PAVInputFormat; buf_size: integer; - ap: PAVFormatParameters): integer; - cdecl; external av__format; + * @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: integer; + ap: PAVFormatParameters): integer; + cdecl; external av__format; - (* no av_open for output, so applications will need this: *) - function av_alloc_format_context (): PAVFormatContext; - cdecl; external av__format; +(** + * 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; -const - AVERROR_UNKNOWN =(-1); (* unknown error *) - AVERROR_IO =(-2); (* i/o error *) - AVERROR_NUMEXPECTED =(-3); (* number syntax expected in filename *) - AVERROR_INVALIDDATA =(-4); (* invalid data found *) - AVERROR_NOMEM =(-5); (* not enough memory *) - AVERROR_NOFMT =(-6); (* unknown format *) - AVERROR_NOTSUPP =(-7); (* operation not supported *) - -(*** Read the beginning of a media file to get stream information. This +(** + * 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 compute the real frame rate in case of mpeg2 repeat + * 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 dont waste time geting stuff the user doesnt need *) + * @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): integer; + cdecl; external av__format; - function av_find_stream_info (ic: PAVFormatContext): integer; - cdecl; external av__format; - function av_read_packet (s: PAVFormatContext; var pkt: TAVPacket): integer; (* CAT#2 *) - cdecl; external av__format; -(*** Return the next frame of a stream. +(** + * 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): integer; + cdecl; external av__format; + +(** + * Return the next frame of a stream. * * The returned packet is valid * until the next av_read_frame() or until av_close_input_file() and @@ -548,132 +841,371 @@ const * then it contains one frame. * * pkt->pts, pkt->dts and pkt->duration are always set to correct - * values in AV_TIME_BASE unit (and guessed if the format cannot + * 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. *) + * @return 0 if OK, < 0 if error or end of file. + *) +function av_read_frame (s: PAVFormatContext; var pkt: TAVPacket): integer; (* CAT#2 *) + cdecl; external av__format; - function av_read_frame (s: PAVFormatContext; var pkt: TAVPacket): integer; (* CAT#2 *) - cdecl; external av__format; - function av_seek_frame (s: PAVFormatContext; stream_index: integer; timestamp: int64; flags: integer): integer; - cdecl; external av__format; - function av_read_play (s: PAVFormatContext): integer; - cdecl; external av__format; - function av_read_pause (s: PAVFormatContext): integer; - cdecl; external av__format; - procedure av_close_input_file (s: PAVFormatContext); - cdecl; external av__format; - function av_new_stream (s: PAVFormatContext; id: integer): PAVStream; - cdecl; external av__format; - procedure av_set_pts_info (s: PAVStream; pts_wrap_bits: integer; - pts_num: integer; pts_den: integer); - cdecl; external av__format; +(** + * 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: integer; timestamp: int64; flags: integer): integer; + cdecl; external av__format; + +(** + * start playing a network based stream (e.g. RTSP stream) at the + * current position + *) +function av_read_play (s: PAVFormatContext): integer; + 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): integer; + 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(AVFormatContext *s); + cdecl; external av__format; +{$IFEND} + +(** + * Close a media file (but not its codecs). + * + * @param s media file handle + *) +procedure av_close_input_file (s: PAVFormatContext); + cdecl; external av__format; + +(** + * Add a new stream to a media file. + * + * Can only be called in the read_header() function. If the flag + * AVFMTCTX_NOHEADER is in the format context, then new streams + * can be added in read_packet too. + * + * @param s media file handle + * @param id file format dependent stream id + *) +function av_new_stream (s: PAVFormatContext; id: integer): PAVStream; + cdecl; external av__format; +{$IF LIBAVFORMAT_VERSION >= 51014000} // 51.14.0 +function av_new_program(s: PAVFormatContext; id: integer): PAVProgram; + 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: integer; + pts_num: integer; pts_den: integer); + cdecl; external av__format; const - AVSEEK_FLAG_BACKWARD =1; ///< seek backward - AVSEEK_FLAG_BYTE =2; ///< seeking based on position in bytes - AVSEEK_FLAG_ANY =4; ///< seek to any frame, even non keyframes + AVSEEK_FLAG_BACKWARD = 1; ///< seek backward + AVSEEK_FLAG_BYTE = 2; ///< seeking based on position in bytes + AVSEEK_FLAG_ANY = 4; ///< seek to any frame, even non keyframes - function av_find_default_stream_index (s: PAVFormatContext): integer; - cdecl; external av__format; - function av_index_search_timestamp (st: PAVStream; timestamp: int64; flags: integer): integer; - cdecl; external av__format; - function av_add_index_entry (st: PAVStream; pos: int64; timestamp: int64; - distance: integer; flags: integer): integer; - cdecl; external av__format; - function av_seek_frame_binary (s: PAVFormatContext; stream_index: integer; - target_ts: int64; flags: integer): integer; - cdecl; external av__format; +function av_find_default_stream_index (s: PAVFormatContext): integer; + cdecl; external av__format; - procedure av_update_cur_dts (s: PAVFormatContext; ref_st: PAVStream; - timestamp: int64); - 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: int64; flags: integer): integer; + cdecl; external av__format; -(* media file output *) - function av_set_parameters (s: PAVFormatContext; ap: PAVFormatParameters): integer; - 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: integer); + cdecl; external av__format; +{$IFEND} - function av_write_header (s: PAVFormatContext): integer; - cdecl; external av__format; +(** + * Add a index entry into a sorted list updateing if it is already there. + * + * @param timestamp timestamp in the timebase of the given stream + *) +function av_add_index_entry (st: PAVStream; pos: int64; timestamp: int64; + distance: integer; flags: integer): integer; + cdecl; external av__format; - function av_write_frame(s: PAVFormatContext; var pkt: TAVPacket): integer; - cdecl; external av__format; (* CAT#2 *) +(** + * Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp(). + * This is not supposed to be called directly by a user application, but by demuxers. + * @param target_ts target timestamp in the time base of the given stream + * @param stream_index stream number + *) +function av_seek_frame_binary (s: PAVFormatContext; stream_index: integer; + target_ts: int64; flags: integer): integer; + cdecl; external av__format; - function av_interleaved_write_frame (s: PAVFormatContext; var pkt: TAVPacket): integer; - cdecl; external av__format; (* CAT#2 *) - function av_interleave_packet_per_dts(s: PAVFormatContext; _out: PAVPacket; - pkt: PAVPacket; flush: integer): integer; - cdecl; external av__format; - function av_write_trailer(s: pAVFormatContext): integer; - cdecl; external av__format; +(** + * Updates cur_dts of all streams based on given timestamp and AVStream. + * + * Stream ref_st unchanged, others set cur_dts in their native timebase + * only needed for timestamp wrapping or if (dts not set and pts!=dts). + * @param timestamp new dts expressed in time_base of param ref_st + * @param ref_st reference stream giving time_base of param timestamp + *) +procedure av_update_cur_dts (s: PAVFormatContext; ref_st: PAVStream; + timestamp: int64); + cdecl; external av__format; - procedure dump_format(ic: PAVFormatContext; index: integer; url: pchar; - is_output: integer); - cdecl; external av__format; +{$IF LIBAVFORMAT_VERSION >= 51007000} // 51.7.0 +type + TReadTimestampFunc = function (pavfc: PAVFormatContext; + arg2: integer; arg3: Pint64; arg4: int64): int64; 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: integer; target_ts: int64; + pos_min: int64; pos_max: int64; pos_limit: int64; ts_min: int64; ts_max: int64; + flags: integer; ts_ret: Pint64; read_timestamp: TReadTimestampFunc): int64; + cdecl; external av__format; +{$IFEND} - function parse_image_size(width_ptr: PInteger; height_ptr: PInteger; str: pchar): integer; - cdecl; external av__format; - function parse_frame_rate (frame_rate: PInteger; frame_rate_base: PInteger; arg: pchar): integer; - cdecl; external av__format; - function parse_date(datestr: pchar; duration: integer): int64; - cdecl; external av__format; - function av_gettime (): int64; - cdecl; external av__format; +(* media file output *) +function av_set_parameters (s: PAVFormatContext; ap: PAVFormatParameters): integer; + cdecl; external av__format; -(* ffm specific for ffserver *) -const - FFM_PACKET_SIZE = 4096; +(** + * 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): integer; + cdecl; external av__format; - function ffm_read_write_index (fd: integer): int64; - 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): integer; + cdecl; external av__format; (* CAT#2 *) + +(** + * 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): integer; + cdecl; external av__format; (* CAT#2 *) + +(** + * 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 occured + *) +function av_interleave_packet_per_dts(s: PAVFormatContext; _out: PAVPacket; + pkt: PAVPacket; flush: integer): integer; + cdecl; external av__format; - procedure ffm_write_write_index(fd: integer; pos: int64); - 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): integer; + cdecl; external av__format; - procedure ffm_set_write_index (s: PAVFormatContext; pos: int64; file_size: int64); - cdecl; external av__format; +procedure dump_format(ic: PAVFormatContext; index: integer; url: pchar; + is_output: integer); + cdecl; external av__format; - function find_info_tag (arg: pchar; arg_size: integer; tag1: pchar; info: pchar): integer; - 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: PInteger; height_ptr: PInteger; str: pchar): integer; + 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: PInteger; frame_rate_base: PInteger; arg: pchar): integer; + 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: integer): int64; + cdecl; external av__format; - function get_frame_filename(buf: pchar; buf_size: integer; - path: pchar; number: integer): integer; - cdecl; external av__format; - function filename_number_test (filename: pchar): integer; - cdecl; external av__format; +function av_gettime (): int64; + cdecl; external av__format; +(* ffm specific for ffserver *) +const + FFM_PACKET_SIZE = 4096; -(* grab specific *) - function video_grab_init (): integer; - cdecl; external av__format; - function audio_init (): integer; - cdecl; external av__format; +function ffm_read_write_index (fd: integer): int64; + cdecl; external av__format; -(* DV1394 *) - function dv1394_init (): integer; - cdecl; external av__format; - function dc1394_init (): integer; - cdecl; external av__format; +procedure ffm_write_write_index(fd: integer; pos: int64); + cdecl; external av__format; - function strstart(str: pchar; val: pchar; ptr: PPointer): integer; - cdecl; external av__format; - function stristart(str: pchar; val: pchar; ptr: PPointer): integer; - cdecl; external av__format; - procedure pstrcpy(buf: pchar; buf_size: integer; str: pchar); - cdecl; external av__format; - function pstrcat(buf: pchar; buf_size: integer; s: pchar): pchar; - cdecl; external av__format; +procedure ffm_set_write_index (s: PAVFormatContext; pos: int64; file_size: int64); + cdecl; external av__format; - procedure __dynarray_add (tab_ptr: PPointer; nb_ptr: PInteger; elem: cardinal); - 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: integer; tag1: pchar; info: pchar): integer; + 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: integer; + path: pchar; number: integer): integer; + cdecl; external av__format + {$IF LIBAVFORMAT_VERSION <= 50006000} // 50.6.0 + name 'get_frame_filename' + {$IFEND}; + +(** + * Check whether filename actually is a numbered sequence generator. + * + * @param filename possible numbered sequence string + * @return 1 if a valid numbered sequence string, 0 otherwise. + *) +function av_filename_number_test(filename: pchar): integer; + cdecl; external av__format + {$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: integer; buff: PChar; size: integer): integer; + cdecl; external av__format; +{$IFEND} implementation -procedure av_init_packet (var pkt: TAVPacket); (* CAT#2 + bug fix *) +{$IF LIBAVFORMAT_VERSION < 51012002} // 51.12.2 +procedure av_init_packet (var pkt: TAVPacket); begin with pkt do begin pts := AV_NOPTS_VALUE; @@ -685,12 +1217,12 @@ begin destruct := @av_destruct_packet_nofree end end; +{$IFEND} -procedure av_free_packet (var pkt: TAVPacket); (* CAT#2 *) +procedure av_free_packet (pkt: PAVPacket); begin - if @pkt.destruct <> nil then pkt.destruct (@pkt) -{ if (pkt <> nil) and (@pkt^.destruct <> nil) then - pkt^.destruct (pkt)} + if ((pkt <> nil) and (@pkt^.destruct <> nil)) then + pkt^.destruct(pkt); end; end. |