+++ /dev/null
-/*
- * copyright (c) 2001 Fabrice Bellard
- *
- * 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 2.1 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
- */
-
-#ifndef AVFORMAT_H
-#define AVFORMAT_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define LIBAVFORMAT_VERSION_INT ((51<<16)+(12<<8)+1)
-#define LIBAVFORMAT_VERSION 51.12.1
-#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
-
-#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
-
-#include <time.h>
-#include <stdio.h> /* FILE */
-#include "avcodec.h"
-
-#include "avio.h"
-
-/* packet functions */
-
-typedef struct AVPacket {
- int64_t pts; ///< presentation time stamp in time_base units
- int64_t dts; ///< decompression time stamp in time_base units
- uint8_t *data;
- int size;
- int stream_index;
- int flags;
- int duration; ///< presentation duration in time_base units (0 if not available)
- void (*destruct)(struct AVPacket *);
- void *priv;
- int64_t pos; ///< byte position in stream, -1 if unknown
-} AVPacket;
-#define PKT_FLAG_KEY 0x0001
-
-void av_destruct_packet_nofree(AVPacket *pkt);
-
-/**
- * Default packet destructor.
- */
-void av_destruct_packet(AVPacket *pkt);
-
-/* initialize optional fields of a packet */
-static inline void av_init_packet(AVPacket *pkt)
-{
- pkt->pts = AV_NOPTS_VALUE;
- pkt->dts = AV_NOPTS_VALUE;
- pkt->pos = -1;
- pkt->duration = 0;
- pkt->flags = 0;
- pkt->stream_index = 0;
- pkt->destruct= av_destruct_packet_nofree;
-}
-
-/**
- * Allocate the payload of a packet and intialized its fields to default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return 0 if OK. AVERROR_xxx otherwise.
- */
-int av_new_packet(AVPacket *pkt, int size);
-
-/**
- * Allocate and read the payload of a packet and intialized its fields to default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return >0 (read size) if OK. AVERROR_xxx otherwise.
- */
-int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
-
-/**
- * @warning This is a hack - the packet memory allocation stuff is broken. The
- * packet is allocated if it was not really allocated
- */
-int av_dup_packet(AVPacket *pkt);
-
-/**
- * Free a packet
- *
- * @param pkt packet to free
- */
-static inline void av_free_packet(AVPacket *pkt)
-{
- if (pkt && pkt->destruct) {
- pkt->destruct(pkt);
- }
-}
-
-/*************************************************/
-/* 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
- * @deprecated Use AVRational instead
-*/
-typedef struct AVFrac {
- int64_t val, num, den;
-} AVFrac attribute_deprecated;
-
-/*************************************************/
-/* input/output formats */
-
-struct AVCodecTag;
-
-struct AVFormatContext;
-
-/** this structure contains the data a format has to probe a file */
-typedef struct AVProbeData {
- const char *filename;
- unsigned char *buf;
- int buf_size;
-} AVProbeData;
-
-#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
-#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
-
-typedef struct AVFormatParameters {
- AVRational time_base;
- int sample_rate;
- int channels;
- int width;
- int height;
- enum PixelFormat pix_fmt;
- int channel; /**< used to select dv channel */
-#if LIBAVFORMAT_VERSION_INT < (52<<16)
- const char *device; /**< video, audio or DV device */
-#endif
- const char *standard; /**< 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;
- enum CodecID video_codec_id;
- enum CodecID audio_codec_id;
-} AVFormatParameters;
-
-//! demuxer will use url_fopen, no opened file should be provided by the caller
-#define AVFMT_NOFILE 0x0001
-#define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
-#define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
-#define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
- raw picture data */
-#define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
-#define AVFMT_NOTIMESTAMPS 0x0080 /**< format doesnt need / has any timestamps */
-#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
-
-typedef struct AVOutputFormat {
- const char *name;
- const char *long_name;
- const char *mime_type;
- const char *extensions; /**< comma separated filename extensions */
- /** size of private data so that it can be allocated in the wrapper */
- int priv_data_size;
- /* output support */
- enum CodecID audio_codec; /**< default audio codec */
- enum CodecID video_codec; /**< default video codec */
- int (*write_header)(struct AVFormatContext *);
- int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
- int (*write_trailer)(struct AVFormatContext *);
- /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
- int flags;
- /** currently only used to set pixel format if not YUV420P */
- int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
- int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
-
- /**
- * 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;
-
- /* private fields */
- struct AVOutputFormat *next;
-} AVOutputFormat;
-
-typedef struct AVInputFormat {
- const char *name;
- const char *long_name;
- /** size of private data so that it can be allocated in the wrapper */
- int priv_data_size;
- /** tell if a given file has a chance of being parsing by this format */
- int (*read_probe)(AVProbeData *);
- /** read the format header and initialize the AVFormatContext
- structure. Return 0 if OK. 'ap' if non NULL contains
- additional paramters. Only used in raw format right
- now. 'av_new_stream' should be called to create new streams. */
- int (*read_header)(struct AVFormatContext *,
- AVFormatParameters *ap);
- /** 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. */
- int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
- /** close the stream. The AVFormatContext and AVStreams are not
- freed by this function */
- int (*read_close)(struct AVFormatContext *);
- /**
- * 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
- */
- int (*read_seek)(struct AVFormatContext *,
- int stream_index, int64_t timestamp, int flags);
- /**
- * gets the next timestamp in AV_TIME_BASE units.
- */
- int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
- int64_t *pos, int64_t pos_limit);
- /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
- int flags;
- /** if extensions are defined, then no probe is done. You should
- usually not use extension format guessing because it is not
- reliable enough */
- const char *extensions;
- /** general purpose read only value that the format can use */
- int value;
-
- /** start/resume playing - only meaningful if using a network based format
- (RTSP) */
- int (*read_play)(struct AVFormatContext *);
-
- /** pause playing - only meaningful if using a network based format
- (RTSP) */
- int (*read_pause)(struct AVFormatContext *);
-
- const struct AVCodecTag **codec_tag;
-
- /* private fields */
- struct AVInputFormat *next;
-} AVInputFormat;
-
-enum AVStreamParseType {
- 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 */
-};
-
-typedef struct AVIndexEntry {
- int64_t pos;
- int64_t timestamp;
-#define AVINDEX_KEYFRAME 0x0001
- int flags:2;
- int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
- int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
-} AVIndexEntry;
-
-typedef struct AVStream {
- int index; /**< stream index in AVFormatContext */
- int id; /**< format specific stream id */
- AVCodecContext *codec; /**< codec context */
- /**
- * real base frame rate of the stream.
- * this is the lowest framerate with which all timestamps can be
- * represented accurately (its the least common multiple of all
- * framerates 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
- */
- AVRational r_frame_rate;
- void *priv_data;
-#if LIBAVFORMAT_VERSION_INT < (52<<16)
- /* internal data used in av_find_stream_info() */
- int64_t codec_info_duration;
- int codec_info_nb_frames;
-#endif
- /** encoding: PTS generation when outputing stream */
- AVFrac pts;
-
- /**
- * 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.
- */
- AVRational time_base;
- int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
- /* ffmpeg.c private use */
- int stream_copy; /**< if set, just copy stream */
- enum AVDiscard discard; ///< 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 */
- float quality;
- /** decoding: pts of the first frame of the stream, in stream time base. */
- int64_t start_time;
- /** decoding: duration of the stream, in stream time base. */
- int64_t duration;
-
- char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
-
- /* av_read_frame() support */
- enum AVStreamParseType need_parsing;
- struct AVCodecParserContext *parser;
-
- int64_t cur_dts;
- int last_IP_duration;
- int64_t last_IP_pts;
- /* av_seek_frame() support */
- AVIndexEntry *index_entries; /**< only used if the format does not
- support seeking natively */
- int nb_index_entries;
- unsigned int index_entries_allocated_size;
-
- int64_t nb_frames; ///< number of frames in this stream if known or 0
-
-#define MAX_REORDER_DELAY 4
- int64_t pts_buffer[MAX_REORDER_DELAY+1];
-} AVStream;
-
-#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
- (streams are added dynamically) */
-
-#define MAX_STREAMS 20
-
-/* format I/O context */
-typedef struct AVFormatContext {
- const AVClass *av_class; /**< set by av_alloc_format_context */
- /* can only be iformat or oformat, not both at the same time */
- struct AVInputFormat *iformat;
- struct AVOutputFormat *oformat;
- void *priv_data;
- ByteIOContext pb;
- unsigned int nb_streams;
- AVStream *streams[MAX_STREAMS];
- char filename[1024]; /**< input or output filename */
- /* stream info */
- int64_t timestamp;
- char title[512];
- char author[512];
- char copyright[512];
- char comment[512];
- char album[512];
- int year; /**< ID3 year, 0 if none */
- int track; /**< track number, 0 if none */
- char genre[32]; /**< ID3 genre */
-
- int ctx_flags; /**< 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 */
- struct AVPacketList *packet_buffer;
-
- /** 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. */
- int64_t start_time;
- /** decoding: duration of the stream, in AV_TIME_BASE fractional
- seconds. NEVER set this value directly: it is deduced from the
- AVStream values. */
- int64_t duration;
- /** decoding: total file size. 0 if unknown */
- int64_t file_size;
- /** 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. */
- int bit_rate;
-
- /* av_read_frame() support */
- AVStream *cur_st;
- const uint8_t *cur_ptr;
- int cur_len;
- AVPacket cur_pkt;
-
- /* av_seek_frame() support */
- int64_t data_offset; /** offset of the first packet */
- int index_built;
-
- int mux_rate;
- int packet_size;
- int preload;
- int max_delay;
-
-#define AVFMT_NOOUTPUTLOOP -1
-#define AVFMT_INFINITEOUTPUTLOOP 0
- /** number of times to loop output in formats that support it */
- int loop_output;
-
- int flags;
-#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
-#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
-
- int loop_input;
- /** decoding: size of data to probe; encoding unused */
- unsigned int probesize;
-
- /**
- * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info()
- */
- int max_analyze_duration;
-
- const uint8_t *key;
- int keylen;
-} AVFormatContext;
-
-typedef struct AVPacketList {
- AVPacket pkt;
- struct AVPacketList *next;
-} AVPacketList;
-
-extern AVInputFormat *first_iformat;
-extern AVOutputFormat *first_oformat;
-
-enum CodecID av_guess_image2_codec(const char *filename);
-
-/* XXX: use automatic init with either ELF sections or C file parser */
-/* modules */
-
-#include "rtp.h"
-
-#include "rtsp.h"
-
-/* utils.c */
-void av_register_input_format(AVInputFormat *format);
-void av_register_output_format(AVOutputFormat *format);
-AVOutputFormat *guess_stream_format(const char *short_name,
- const char *filename, const char *mime_type);
-AVOutputFormat *guess_format(const char *short_name,
- const char *filename, const char *mime_type);
-
-/**
- * Guesses the codec id based upon muxer and filename.
- */
-enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
- const char *filename, const char *mime_type, enum CodecType type);
-
-/**
- * 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
- */
-void av_hex_dump(FILE *f, uint8_t *buf, int size);
-
-/**
- * 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
- */
-void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
-
-/**
- * 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
- */
-void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
-
-/**
- * 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
- */
-void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
-
-void av_register_all(void);
-
-/** codec tag <-> codec id */
-enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
-unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
-
-/* media file input */
-
-/**
- * finds AVInputFormat based on input format's short name.
- */
-AVInputFormat *av_find_input_format(const char *short_name);
-
-/**
- * Guess file format.
- *
- * @param is_opened whether the file is already opened, determines whether
- * demuxers with or without AVFMT_NOFILE are probed
- */
-AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
-
-/**
- * Allocates all the structures needed to read an input stream.
- * This does not open the needed codecs for decoding the stream[s].
- */
-int av_open_input_stream(AVFormatContext **ic_ptr,
- ByteIOContext *pb, const char *filename,
- AVInputFormat *fmt, AVFormatParameters *ap);
-
-/**
- * Open a media file as input. The codec are not opened. Only the file
- * header (if present) is read.
- *
- * @param ic_ptr the opened media file handle is put here
- * @param filename filename to open.
- * @param fmt if non NULL, force the file format to use
- * @param buf_size optional buffer size (zero if default is OK)
- * @param ap additional parameters needed when opening the file (NULL if default)
- * @return 0 if OK. AVERROR_xxx otherwise.
- */
-int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
- AVInputFormat *fmt,
- int buf_size,
- AVFormatParameters *ap);
-/** no av_open for output, so applications will need this: */
-AVFormatContext *av_alloc_format_context(void);
-
-/**
- * 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 dont waste time geting stuff the user doesnt need
- */
-int av_find_stream_info(AVFormatContext *ic);
-
-/**
- * Read a transport packet from a media file.
- *
- * This function is absolete 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.
- */
-int av_read_packet(AVFormatContext *s, AVPacket *pkt);
-
-/**
- * Return the next frame of a stream.
- *
- * The returned packet is valid
- * until the next av_read_frame() or until av_close_input_file() and
- * must be freed with av_free_packet. For video, the packet contains
- * exactly one frame. For audio, it contains an integer number of
- * frames if each frame has a known fixed size (e.g. PCM or ADPCM
- * data). If the audio frames have a variable size (e.g. MPEG audio),
- * then it contains one frame.
- *
- * pkt->pts, pkt->dts and pkt->duration are always set to correct
- * values in 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.
- */
-int av_read_frame(AVFormatContext *s, AVPacket *pkt);
-
-/**
- * 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
- */
-int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
-
-/**
- * start playing a network based stream (e.g. RTSP stream) at the
- * current position
- */
-int av_read_play(AVFormatContext *s);
-
-/**
- * Pause a network based stream (e.g. RTSP stream).
- *
- * Use av_read_play() to resume it.
- */
-int av_read_pause(AVFormatContext *s);
-
-/**
- * Close a media file (but not its codecs).
- *
- * @param s media file handle
- */
-void av_close_input_file(AVFormatContext *s);
-
-/**
- * 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
- */
-AVStream *av_new_stream(AVFormatContext *s, int id);
-
-/**
- * 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)
- */
-void av_set_pts_info(AVStream *s, int pts_wrap_bits,
- int pts_num, int pts_den);
-
-#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
-#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
-#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
-
-int av_find_default_stream_index(AVFormatContext *s);
-
-/**
- * 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
- */
-int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
-
-/**
- * Add a index entry into a sorted list updateing if it is already there.
- *
- * @param timestamp timestamp in the timebase of the given stream
- */
-int av_add_index_entry(AVStream *st,
- int64_t pos, int64_t timestamp, int size, int distance, int flags);
-
-/**
- * Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
- * this isnt 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
- */
-int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
-
-/**
- * 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
- */
-void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
-
-/**
- * Does a binary search using read_timestamp().
- * this isnt 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
- */
-int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
-
-/** media file output */
-int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
-
-/**
- * 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.
- */
-int av_write_header(AVFormatContext *s);
-
-/**
- * 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.
- */
-int av_write_frame(AVFormatContext *s, AVPacket *pkt);
-
-/**
- * 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 its slightly faster, its also important
- * to keep in mind that completly non interleaved input will need huge amounts
- * of memory to interleave with this, so its prefereable 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.
- */
-int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
-
-/**
- * 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
- */
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
-
-/**
- * @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.
- */
-int av_write_trailer(AVFormatContext *s);
-
-void dump_format(AVFormatContext *ic,
- int index,
- const char *url,
- int is_output);
-
-/**
- * parses width and height out of string str.
- */
-int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
-
-/**
- * Converts frame rate from string to a fraction.
- */
-int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
-
-/**
- * Converts date string to number of seconds since Jan 1st, 1970.
- *
- * @code
- * Syntax:
- * - If not a duration:
- * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
- * Time is localtime unless Z is suffixed to the end. In this case GMT
- * Return the date in micro seconds since 1970
- *
- * - If a duration:
- * HH[:MM[:SS[.m...]]]
- * S+[.m...]
- * @endcode
- */
-int64_t parse_date(const char *datestr, int duration);
-
-int64_t av_gettime(void);
-
-/* ffm specific for ffserver */
-#define FFM_PACKET_SIZE 4096
-offset_t ffm_read_write_index(int fd);
-void ffm_write_write_index(int fd, offset_t pos);
-void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
-
-/**
- * Attempts to find a specific tag in a URL.
- *
- * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
- * Return 1 if found.
- */
-int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
-
-/**
- * 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
- * @number frame number
- * @return 0 if OK, -1 if format error.
- */
-int av_get_frame_filename(char *buf, int buf_size,
- const char *path, int number);
-
-/**
- * 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.
- */
-int av_filename_number_test(const char *filename);
-
-/* grab specific */
-int video_grab_init(void);
-int audio_init(void);
-
-/* DV1394 */
-int dv1394_init(void);
-int dc1394_init(void);
-
-#ifdef HAVE_AV_CONFIG_H
-
-#include "os_support.h"
-
-int strstart(const char *str, const char *val, const char **ptr);
-int stristart(const char *str, const char *val, const char **ptr);
-void pstrcpy(char *buf, int buf_size, const char *str);
-char *pstrcat(char *buf, int buf_size, const char *s);
-
-void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
-
-#ifdef __GNUC__
-#define dynarray_add(tab, nb_ptr, elem)\
-do {\
- typeof(tab) _tab = (tab);\
- typeof(elem) _elem = (elem);\
- (void)sizeof(**_tab == _elem); /* check that types are compatible */\
- __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
-} while(0)
-#else
-#define dynarray_add(tab, nb_ptr, elem)\
-do {\
- __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
-} while(0)
-#endif
-
-time_t mktimegm(struct tm *tm);
-struct tm *brktimegm(time_t secs, struct tm *tm);
-const char *small_strptime(const char *p, const char *fmt,
- struct tm *dt);
-
-struct in_addr;
-int resolve_host(struct in_addr *sin_addr, const char *hostname);
-
-void url_split(char *proto, int proto_size,
- char *authorization, int authorization_size,
- char *hostname, int hostname_size,
- int *port_ptr,
- char *path, int path_size,
- const char *url);
-
-int match_ext(const char *filename, const char *extensions);
-
-#endif /* HAVE_AV_CONFIG_H */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* AVFORMAT_H */
-
projects / opencv / blobdiff