mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
0c9fc6e187
The new helper function actually differs in semantics from gmtime_r,
so if that seems to be a problem I can actually move it to dv.c
completely, since only DV muxer uses the code anyway.
Originally committed as revision 3399 to svn://svn.ffmpeg.org/ffmpeg/trunk
646 lines
20 KiB
C
646 lines
20 KiB
C
#ifndef AVFORMAT_H
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#define AVFORMAT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LIBAVFORMAT_BUILD 4616
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#define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
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#define LIBAVFORMAT_VERSION FFMPEG_VERSION
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#define LIBAVFORMAT_IDENT "FFmpeg" FFMPEG_VERSION "b" AV_STRINGIFY(LIBAVFORMAT_BUILD)
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#include <time.h>
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#include <stdio.h> /* FILE */
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#include "avcodec.h"
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#include "avio.h"
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/* packet functions */
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#ifndef MAXINT64
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#define MAXINT64 int64_t_C(0x7fffffffffffffff)
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#endif
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#ifndef MININT64
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#define MININT64 int64_t_C(0x8000000000000000)
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#endif
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typedef struct AVPacket {
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int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
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pts_den units in muxers or demuxers) */
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int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
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pts_den units in muxers or demuxers) */
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uint8_t *data;
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int size;
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int stream_index;
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int flags;
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int duration; /* presentation duration (0 if not available) */
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void (*destruct)(struct AVPacket *);
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void *priv;
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} AVPacket;
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#define PKT_FLAG_KEY 0x0001
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/* initialize optional fields of a packet */
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static inline void av_init_packet(AVPacket *pkt)
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{
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pkt->pts = AV_NOPTS_VALUE;
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pkt->dts = AV_NOPTS_VALUE;
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pkt->duration = 0;
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pkt->flags = 0;
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pkt->stream_index = 0;
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}
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int av_new_packet(AVPacket *pkt, int size);
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int av_dup_packet(AVPacket *pkt);
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/**
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* Free a packet
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*
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* @param pkt packet to free
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*/
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static inline void av_free_packet(AVPacket *pkt)
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{
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if (pkt && pkt->destruct) {
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pkt->destruct(pkt);
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}
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}
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/*************************************************/
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/* fractional numbers for exact pts handling */
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/* the exact value of the fractional number is: 'val + num / den'. num
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is assumed to be such as 0 <= num < den */
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typedef struct AVFrac {
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int64_t val, num, den;
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} AVFrac;
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void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
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void av_frac_add(AVFrac *f, int64_t incr);
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void av_frac_set(AVFrac *f, int64_t val);
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/*************************************************/
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/* input/output formats */
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struct AVFormatContext;
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/* this structure contains the data a format has to probe a file */
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typedef struct AVProbeData {
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const char *filename;
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unsigned char *buf;
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int buf_size;
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} AVProbeData;
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#define AVPROBE_SCORE_MAX 100
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typedef struct AVFormatParameters {
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int frame_rate;
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int frame_rate_base;
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int sample_rate;
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int channels;
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int width;
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int height;
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enum PixelFormat pix_fmt;
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struct AVImageFormat *image_format;
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int channel; /* used to select dv channel */
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const char *device; /* video4linux, audio or DV device */
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const char *standard; /* tv standard, NTSC, PAL, SECAM */
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int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
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int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
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stream packet (only meaningful if
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mpeg2ts_raw is TRUE */
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int initial_pause:1; /* do not begin to play the stream
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immediately (RTSP only) */
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} AVFormatParameters;
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#define AVFMT_NOFILE 0x0001 /* no file should be opened */
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#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
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#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
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raw picture data */
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typedef struct AVOutputFormat {
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const char *name;
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const char *long_name;
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const char *mime_type;
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const char *extensions; /* comma separated extensions */
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/* size of private data so that it can be allocated in the wrapper */
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int priv_data_size;
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/* output support */
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enum CodecID audio_codec; /* default audio codec */
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enum CodecID video_codec; /* default video codec */
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int (*write_header)(struct AVFormatContext *);
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int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
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int (*write_trailer)(struct AVFormatContext *);
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/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
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int flags;
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/* currently only used to set pixel format if not YUV420P */
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int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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/* private fields */
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struct AVOutputFormat *next;
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} AVOutputFormat;
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typedef struct AVInputFormat {
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const char *name;
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const char *long_name;
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/* size of private data so that it can be allocated in the wrapper */
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int priv_data_size;
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/* tell if a given file has a chance of being parsing by this format */
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int (*read_probe)(AVProbeData *);
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/* read the format header and initialize the AVFormatContext
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structure. Return 0 if OK. 'ap' if non NULL contains
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additionnal paramters. Only used in raw format right
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now. 'av_new_stream' should be called to create new streams. */
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int (*read_header)(struct AVFormatContext *,
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AVFormatParameters *ap);
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/* read one packet and put it in 'pkt'. pts and flags are also
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set. 'av_new_stream' can be called only if the flag
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AVFMTCTX_NOHEADER is used. */
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int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
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/* close the stream. The AVFormatContext and AVStreams are not
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freed by this function */
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int (*read_close)(struct AVFormatContext *);
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/* seek at or before a given timestamp (given in AV_TIME_BASE
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units) relative to the frames in stream component stream_index */
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int (*read_seek)(struct AVFormatContext *,
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int stream_index, int64_t timestamp);
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/**
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* gets the next timestamp in AV_TIME_BASE units.
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*/
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int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
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int64_t *pos, int64_t pos_limit);
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/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
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int flags;
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/* if extensions are defined, then no probe is done. You should
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usually not use extension format guessing because it is not
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reliable enough */
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const char *extensions;
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/* general purpose read only value that the format can use */
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int value;
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/* start/resume playing - only meaningful if using a network based format
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(RTSP) */
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int (*read_play)(struct AVFormatContext *);
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/* pause playing - only meaningful if using a network based format
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(RTSP) */
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int (*read_pause)(struct AVFormatContext *);
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/* private fields */
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struct AVInputFormat *next;
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} AVInputFormat;
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typedef struct AVIndexEntry {
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int64_t pos;
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int64_t timestamp;
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#define AVINDEX_KEYFRAME 0x0001
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/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
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int flags;
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int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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} AVIndexEntry;
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typedef struct AVStream {
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int index; /* stream index in AVFormatContext */
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int id; /* format specific stream id */
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AVCodecContext codec; /* codec context */
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int r_frame_rate; /* real frame rate of the stream */
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int r_frame_rate_base;/* real frame rate base of the stream */
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void *priv_data;
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/* internal data used in av_find_stream_info() */
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int64_t codec_info_duration;
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int codec_info_nb_frames;
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/* encoding: PTS generation when outputing stream */
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AVFrac pts;
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AVRational time_base;
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int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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/* ffmpeg.c private use */
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int stream_copy; /* if TRUE, just copy stream */
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/* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
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* MN:dunno if thats the right place, for it */
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float quality;
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/* decoding: position of the first frame of the component, in
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AV_TIME_BASE fractional seconds. */
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int64_t start_time;
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/* decoding: duration of the stream, in AV_TIME_BASE fractional
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seconds. */
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int64_t duration;
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/* av_read_frame() support */
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int need_parsing;
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struct AVCodecParserContext *parser;
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int64_t cur_dts;
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int last_IP_duration;
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int64_t last_IP_pts;
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/* av_seek_frame() support */
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AVIndexEntry *index_entries; /* only used if the format does not
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support seeking natively */
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int nb_index_entries;
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int index_entries_allocated_size;
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} AVStream;
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#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
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(streams are added dynamically) */
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#define MAX_STREAMS 20
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/* format I/O context */
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typedef struct AVFormatContext {
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AVClass *av_class; /* set by av_alloc_format_context */
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/* can only be iformat or oformat, not both at the same time */
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struct AVInputFormat *iformat;
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struct AVOutputFormat *oformat;
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void *priv_data;
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ByteIOContext pb;
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int nb_streams;
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AVStream *streams[MAX_STREAMS];
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char filename[1024]; /* input or output filename */
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/* stream info */
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int64_t timestamp;
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char title[512];
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char author[512];
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char copyright[512];
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char comment[512];
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char album[512];
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int year; /* ID3 year, 0 if none */
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int track; /* track number, 0 if none */
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char genre[32]; /* ID3 genre */
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int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
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/* private data for pts handling (do not modify directly) */
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/* This buffer is only needed when packets were already buffered but
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not decoded, for example to get the codec parameters in mpeg
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streams */
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struct AVPacketList *packet_buffer;
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/* decoding: position of the first frame of the component, in
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AV_TIME_BASE fractional seconds. NEVER set this value directly:
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it is deduced from the AVStream values. */
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int64_t start_time;
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/* decoding: duration of the stream, in AV_TIME_BASE fractional
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seconds. NEVER set this value directly: it is deduced from the
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AVStream values. */
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int64_t duration;
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/* decoding: total file size. 0 if unknown */
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int64_t file_size;
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/* decoding: total stream bitrate in bit/s, 0 if not
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available. Never set it directly if the file_size and the
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duration are known as ffmpeg can compute it automatically. */
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int bit_rate;
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/* av_read_frame() support */
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AVStream *cur_st;
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const uint8_t *cur_ptr;
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int cur_len;
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AVPacket cur_pkt;
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/* av_seek_frame() support */
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int64_t data_offset; /* offset of the first packet */
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int index_built;
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} AVFormatContext;
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typedef struct AVPacketList {
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AVPacket pkt;
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struct AVPacketList *next;
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} AVPacketList;
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extern AVInputFormat *first_iformat;
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extern AVOutputFormat *first_oformat;
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/* still image support */
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struct AVInputImageContext;
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typedef struct AVInputImageContext AVInputImageContext;
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typedef struct AVImageInfo {
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enum PixelFormat pix_fmt; /* requested pixel format */
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int width; /* requested width */
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int height; /* requested height */
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int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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AVPicture pict; /* returned allocated image */
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} AVImageInfo;
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/* AVImageFormat.flags field constants */
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#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
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typedef struct AVImageFormat {
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const char *name;
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const char *extensions;
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/* tell if a given file has a chance of being parsing by this format */
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int (*img_probe)(AVProbeData *);
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/* read a whole image. 'alloc_cb' is called when the image size is
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known so that the caller can allocate the image. If 'allo_cb'
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returns non zero, then the parsing is aborted. Return '0' if
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OK. */
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int (*img_read)(ByteIOContext *,
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int (*alloc_cb)(void *, AVImageInfo *info), void *);
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/* write the image */
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int supported_pixel_formats; /* mask of supported formats for output */
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int (*img_write)(ByteIOContext *, AVImageInfo *);
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int flags;
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struct AVImageFormat *next;
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} AVImageFormat;
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void av_register_image_format(AVImageFormat *img_fmt);
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AVImageFormat *av_probe_image_format(AVProbeData *pd);
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AVImageFormat *guess_image_format(const char *filename);
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int av_read_image(ByteIOContext *pb, const char *filename,
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AVImageFormat *fmt,
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int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
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int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
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extern AVImageFormat *first_image_format;
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extern AVImageFormat pnm_image_format;
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extern AVImageFormat pbm_image_format;
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extern AVImageFormat pgm_image_format;
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extern AVImageFormat ppm_image_format;
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extern AVImageFormat pam_image_format;
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extern AVImageFormat pgmyuv_image_format;
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extern AVImageFormat yuv_image_format;
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#ifdef CONFIG_ZLIB
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extern AVImageFormat png_image_format;
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#endif
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extern AVImageFormat jpeg_image_format;
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extern AVImageFormat gif_image_format;
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extern AVImageFormat sgi_image_format;
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/* XXX: use automatic init with either ELF sections or C file parser */
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/* modules */
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/* mpeg.c */
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extern AVInputFormat mpegps_demux;
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int mpegps_init(void);
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/* mpegts.c */
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extern AVInputFormat mpegts_demux;
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int mpegts_init(void);
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/* rm.c */
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int rm_init(void);
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/* crc.c */
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int crc_init(void);
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/* img.c */
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int img_init(void);
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/* img2.c */
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int img2_init(void);
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/* asf.c */
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int asf_init(void);
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/* avienc.c */
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int avienc_init(void);
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/* avidec.c */
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int avidec_init(void);
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/* swf.c */
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int swf_init(void);
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/* mov.c */
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int mov_init(void);
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/* movenc.c */
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int movenc_init(void);
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/* flvenc.c */
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int flvenc_init(void);
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/* flvdec.c */
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int flvdec_init(void);
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/* jpeg.c */
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int jpeg_init(void);
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/* gif.c */
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int gif_init(void);
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/* au.c */
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int au_init(void);
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/* amr.c */
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int amr_init(void);
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/* wav.c */
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int ff_wav_init(void);
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/* raw.c */
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int pcm_read_seek(AVFormatContext *s,
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int stream_index, int64_t timestamp);
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int raw_init(void);
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/* mp3.c */
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int mp3_init(void);
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/* yuv4mpeg.c */
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int yuv4mpeg_init(void);
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/* ogg.c */
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int ogg_init(void);
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/* dv.c */
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int ff_dv_init(void);
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/* ffm.c */
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int ffm_init(void);
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/* rtsp.c */
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extern AVInputFormat redir_demux;
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int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
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/* 4xm.c */
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int fourxm_init(void);
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/* psxstr.c */
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int str_init(void);
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/* idroq.c */
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int roq_init(void);
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/* ipmovie.c */
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int ipmovie_init(void);
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/* nut.c */
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int nut_init(void);
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/* wc3movie.c */
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int wc3_init(void);
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/* westwood.c */
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int westwood_init(void);
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/* segafilm.c */
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int film_init(void);
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/* idcin.c */
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int idcin_init(void);
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/* flic.c */
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int flic_init(void);
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/* sierravmd.c */
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int vmd_init(void);
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/* matroska.c */
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int matroska_init(void);
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#include "rtp.h"
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#include "rtsp.h"
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/* yuv4mpeg.c */
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extern AVOutputFormat yuv4mpegpipe_oformat;
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/* utils.c */
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void av_register_input_format(AVInputFormat *format);
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void av_register_output_format(AVOutputFormat *format);
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AVOutputFormat *guess_stream_format(const char *short_name,
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const char *filename, const char *mime_type);
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AVOutputFormat *guess_format(const char *short_name,
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const char *filename, const char *mime_type);
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void av_hex_dump(FILE *f, uint8_t *buf, int size);
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void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
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void av_register_all(void);
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typedef struct FifoBuffer {
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uint8_t *buffer;
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uint8_t *rptr, *wptr, *end;
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} FifoBuffer;
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int fifo_init(FifoBuffer *f, int size);
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void fifo_free(FifoBuffer *f);
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int fifo_size(FifoBuffer *f, uint8_t *rptr);
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int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
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void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
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/* media file input */
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AVInputFormat *av_find_input_format(const char *short_name);
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AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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int av_open_input_stream(AVFormatContext **ic_ptr,
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ByteIOContext *pb, const char *filename,
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AVInputFormat *fmt, AVFormatParameters *ap);
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int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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AVInputFormat *fmt,
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int buf_size,
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AVFormatParameters *ap);
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/* no av_open for output, so applications will need this: */
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AVFormatContext *av_alloc_format_context(void);
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#define AVERROR_UNKNOWN (-1) /* unknown error */
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#define AVERROR_IO (-2) /* i/o error */
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#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
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#define AVERROR_INVALIDDATA (-4) /* invalid data found */
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#define AVERROR_NOMEM (-5) /* not enough memory */
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#define AVERROR_NOFMT (-6) /* unknown format */
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#define AVERROR_NOTSUPP (-7) /* operation not supported */
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int av_find_stream_info(AVFormatContext *ic);
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int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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int av_read_frame(AVFormatContext *s, AVPacket *pkt);
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int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
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int av_read_play(AVFormatContext *s);
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int av_read_pause(AVFormatContext *s);
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void av_close_input_file(AVFormatContext *s);
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AVStream *av_new_stream(AVFormatContext *s, int id);
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void av_set_pts_info(AVStream *s, int pts_wrap_bits,
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int pts_num, int pts_den);
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int av_find_default_stream_index(AVFormatContext *s);
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int av_index_search_timestamp(AVStream *st, int timestamp);
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int av_add_index_entry(AVStream *st,
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int64_t pos, int64_t timestamp, int distance, int flags);
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int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts);
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/* media file output */
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int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
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int av_write_header(AVFormatContext *s);
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int av_write_frame(AVFormatContext *s, AVPacket *pkt);
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int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
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int av_write_trailer(AVFormatContext *s);
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void dump_format(AVFormatContext *ic,
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int index,
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|
const char *url,
|
|
int is_output);
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int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
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int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
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int64_t parse_date(const char *datestr, int duration);
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int64_t av_gettime(void);
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/* ffm specific for ffserver */
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#define FFM_PACKET_SIZE 4096
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offset_t ffm_read_write_index(int fd);
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void ffm_write_write_index(int fd, offset_t pos);
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void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
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int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
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|
|
|
int get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number);
|
|
int filename_number_test(const char *filename);
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|
|
|
/* grab specific */
|
|
int video_grab_init(void);
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|
int audio_init(void);
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|
|
|
/* DV1394 */
|
|
int dv1394_init(void);
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|
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|
#ifdef HAVE_AV_CONFIG_H
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|
|
#include "os_support.h"
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|
|
|
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);
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|
|
|
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 */
|