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ffmpeg/libavformat/avformat.h

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#ifndef AVFORMAT_H
#define AVFORMAT_H
#ifdef __cplusplus
extern "C" {
#endif
#define LIBAVFORMAT_BUILD 4621
#define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVFORMAT_VERSION FFMPEG_VERSION
#define LIBAVFORMAT_IDENT "FFmpeg" FFMPEG_VERSION "b" AV_STRINGIFY(LIBAVFORMAT_BUILD)
#include <time.h>
#include <stdio.h> /* FILE */
#include "avcodec.h"
#include "avio.h"
/* packet functions */
#ifndef MAXINT64
#define MAXINT64 int64_t_C(0x7fffffffffffffff)
#endif
#ifndef MININT64
#define MININT64 int64_t_C(0x8000000000000000)
#endif
typedef struct AVPacket {
int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
pts_den units in muxers or demuxers) */
int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
pts_den units in muxers or demuxers) */
uint8_t *data;
int size;
int stream_index;
int flags;
int duration; /* presentation duration (0 if not available) */
void (*destruct)(struct AVPacket *);
void *priv;
} AVPacket;
#define PKT_FLAG_KEY 0x0001
void av_destruct_packet_nofree(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->duration = 0;
pkt->flags = 0;
pkt->stream_index = 0;
pkt->destruct= av_destruct_packet_nofree;
}
int av_new_packet(AVPacket *pkt, int size);
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;
void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
void av_frac_add(AVFrac *f, int64_t incr);
void av_frac_set(AVFrac *f, int64_t val);
/*************************************************/
/* input/output formats */
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
typedef struct AVFormatParameters {
int frame_rate;
int frame_rate_base;
int sample_rate;
int channels;
int width;
int height;
enum PixelFormat pix_fmt;
struct AVImageFormat *image_format;
int channel; /* used to select dv channel */
const char *device; /* video4linux, audio or DV device */
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) */
enum CodecID video_codec_id;
enum CodecID audio_codec_id;
} AVFormatParameters;
#define AVFMT_NOFILE 0x0001 /* no file should be opened */
#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 */
typedef struct AVOutputFormat {
const char *name;
const char *long_name;
const char *mime_type;
const char *extensions; /* comma separated 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 */
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);
/* 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 *);
/* private fields */
struct AVInputFormat *next;
} AVInputFormat;
typedef struct AVIndexEntry {
int64_t pos;
int64_t timestamp;
#define AVINDEX_KEYFRAME 0x0001
/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
int flags;
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 */
int r_frame_rate; /* real frame rate of the stream */
int r_frame_rate_base;/* real frame rate base of the stream */
void *priv_data;
/* internal data used in av_find_stream_info() */
int64_t codec_info_duration;
int codec_info_nb_frames;
/* encoding: PTS generation when outputing stream */
AVFrac pts;
AVRational time_base;
int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
/* ffmpeg.c private use */
int stream_copy; /* if TRUE, just copy stream */
int discard; ///< if 1, 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;
/* av_read_frame() support */
int 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;
int index_entries_allocated_size;
} 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;
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;
} AVFormatContext;
typedef struct AVPacketList {
AVPacket pkt;
struct AVPacketList *next;
} AVPacketList;
extern AVInputFormat *first_iformat;
extern AVOutputFormat *first_oformat;
/* still image support */
struct AVInputImageContext;
typedef struct AVInputImageContext AVInputImageContext;
typedef struct AVImageInfo {
enum PixelFormat pix_fmt; /* requested pixel format */
int width; /* requested width */
int height; /* requested height */
int interleaved; /* image is interleaved (e.g. interleaved GIF) */
AVPicture pict; /* returned allocated image */
} AVImageInfo;
/* AVImageFormat.flags field constants */
#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
typedef struct AVImageFormat {
const char *name;
const char *extensions;
/* tell if a given file has a chance of being parsing by this format */
int (*img_probe)(AVProbeData *);
/* read a whole image. 'alloc_cb' is called when the image size is
known so that the caller can allocate the image. If 'allo_cb'
returns non zero, then the parsing is aborted. Return '0' if
OK. */
int (*img_read)(ByteIOContext *,
int (*alloc_cb)(void *, AVImageInfo *info), void *);
/* write the image */
int supported_pixel_formats; /* mask of supported formats for output */
int (*img_write)(ByteIOContext *, AVImageInfo *);
int flags;
struct AVImageFormat *next;
} AVImageFormat;
void av_register_image_format(AVImageFormat *img_fmt);
AVImageFormat *av_probe_image_format(AVProbeData *pd);
AVImageFormat *guess_image_format(const char *filename);
enum CodecID av_guess_image2_codec(const char *filename);
int av_read_image(ByteIOContext *pb, const char *filename,
AVImageFormat *fmt,
int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
extern AVImageFormat *first_image_format;
extern AVImageFormat pnm_image_format;
extern AVImageFormat pbm_image_format;
extern AVImageFormat pgm_image_format;
extern AVImageFormat ppm_image_format;
extern AVImageFormat pam_image_format;
extern AVImageFormat pgmyuv_image_format;
extern AVImageFormat yuv_image_format;
#ifdef CONFIG_ZLIB
extern AVImageFormat png_image_format;
#endif
extern AVImageFormat jpeg_image_format;
extern AVImageFormat gif_image_format;
extern AVImageFormat sgi_image_format;
/* XXX: use automatic init with either ELF sections or C file parser */
/* modules */
/* mpeg.c */
extern AVInputFormat mpegps_demux;
int mpegps_init(void);
/* mpegts.c */
extern AVInputFormat mpegts_demux;
int mpegts_init(void);
/* rm.c */
int rm_init(void);
/* crc.c */
int crc_init(void);
/* img.c */
int img_init(void);
/* img2.c */
int img2_init(void);
/* asf.c */
int asf_init(void);
/* avienc.c */
int avienc_init(void);
/* avidec.c */
int avidec_init(void);
/* swf.c */
int swf_init(void);
/* mov.c */
int mov_init(void);
/* movenc.c */
int movenc_init(void);
/* flvenc.c */
int flvenc_init(void);
/* flvdec.c */
int flvdec_init(void);
/* jpeg.c */
int jpeg_init(void);
/* gif.c */
int gif_init(void);
/* au.c */
int au_init(void);
/* amr.c */
int amr_init(void);
/* wav.c */
int ff_wav_init(void);
/* raw.c */
int pcm_read_seek(AVFormatContext *s,
int stream_index, int64_t timestamp, int flags);
int raw_init(void);
/* mp3.c */
int mp3_init(void);
/* yuv4mpeg.c */
int yuv4mpeg_init(void);
/* ogg.c */
int ogg_init(void);
/* dv.c */
int ff_dv_init(void);
/* ffm.c */
int ffm_init(void);
/* rtsp.c */
extern AVInputFormat redir_demux;
int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
/* 4xm.c */
int fourxm_init(void);
/* psxstr.c */
int str_init(void);
/* idroq.c */
int roq_init(void);
/* ipmovie.c */
int ipmovie_init(void);
/* nut.c */
int nut_init(void);
/* wc3movie.c */
int wc3_init(void);
/* westwood.c */
int westwood_init(void);
/* segafilm.c */
int film_init(void);
/* idcin.c */
int idcin_init(void);
/* flic.c */
int flic_init(void);
/* sierravmd.c */
int vmd_init(void);
/* matroska.c */
int matroska_init(void);
/* sol.c */
int sol_init(void);
/* electronicarts.c */
int ea_init(void);
/* nsvdec.c */
int nsvdec_init(void);
#include "rtp.h"
#include "rtsp.h"
/* yuv4mpeg.c */
extern AVOutputFormat yuv4mpegpipe_oformat;
/* 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);
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
const char *filename, const char *mime_type, enum CodecType type);
void av_hex_dump(FILE *f, uint8_t *buf, int size);
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
void av_register_all(void);
typedef struct FifoBuffer {
uint8_t *buffer;
uint8_t *rptr, *wptr, *end;
} FifoBuffer;
int fifo_init(FifoBuffer *f, int size);
void fifo_free(FifoBuffer *f);
int fifo_size(FifoBuffer *f, uint8_t *rptr);
int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
void fifo_realloc(FifoBuffer *f, unsigned int size);
/* media file input */
AVInputFormat *av_find_input_format(const char *short_name);
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
int av_open_input_stream(AVFormatContext **ic_ptr,
ByteIOContext *pb, const char *filename,
AVInputFormat *fmt, AVFormatParameters *ap);
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);
#define AVERROR_UNKNOWN (-1) /* unknown error */
#define AVERROR_IO (-2) /* i/o error */
#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
#define AVERROR_INVALIDDATA (-4) /* invalid data found */
#define AVERROR_NOMEM (-5) /* not enough memory */
#define AVERROR_NOFMT (-6) /* unknown format */
#define AVERROR_NOTSUPP (-7) /* operation not supported */
int av_find_stream_info(AVFormatContext *ic);
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
int av_read_play(AVFormatContext *s);
int av_read_pause(AVFormatContext *s);
void av_close_input_file(AVFormatContext *s);
AVStream *av_new_stream(AVFormatContext *s, int id);
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
int av_find_default_stream_index(AVFormatContext *s);
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
int av_add_index_entry(AVStream *st,
int64_t pos, int64_t timestamp, int distance, int flags);
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
/* media file output */
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
int av_write_header(AVFormatContext *s);
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
int av_write_trailer(AVFormatContext *s);
void dump_format(AVFormatContext *ic,
int index,
const char *url,
int is_output);
int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
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);
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
int get_frame_filename(char *buf, int buf_size,
const char *path, int number);
int 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 */
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