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Diffstat (limited to 'contrib/ffmpeg/libavformat/avformat.h')
| -rw-r--r-- | contrib/ffmpeg/libavformat/avformat.h | 888 |
1 files changed, 888 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/avformat.h b/contrib/ffmpeg/libavformat/avformat.h new file mode 100644 index 000000000..eb8c4e153 --- /dev/null +++ b/contrib/ffmpeg/libavformat/avformat.h @@ -0,0 +1,888 @@ +/* + * 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)+(11<<8)+0) +#define LIBAVFORMAT_VERSION 51.11.0 +#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 */ +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 + +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 + additionnal 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; + +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: position of the first frame of the component, in + AV_TIME_BASE fractional seconds. */ + int64_t start_time; + /** decoding: duration of the stream, in AV_TIME_BASE fractional + seconds. */ + int64_t duration; + + char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */ + + /* av_read_frame() support */ + int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack + 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 additionnal 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 */ + |