mirror of
https://git.ffmpeg.org/ffmpeg.git
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459 lines
14 KiB
C
459 lines
14 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_VERSION_INT 0x000406
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#define LIBAVFORMAT_VERSION "0.4.6"
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#define LIBAVFORMAT_BUILD 4605
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#include "avcodec.h"
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#include "avio.h"
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/* packet functions */
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#define AV_NOPTS_VALUE 0
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typedef struct AVPacket {
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int64_t pts; /* presentation time stamp in stream units (set av_set_pts_info) */
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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;
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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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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->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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/**
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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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pkt->destruct(pkt);
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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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} 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_NOHEADER 0x0004 /* signal that no header is present
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(streams are added dynamically) */
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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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/* XXX: change prototype for 64 bit pts */
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int (*write_packet)(struct AVFormatContext *,
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int stream_index,
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unsigned char *buf, int size, int force_pts);
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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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AVFMT_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 pts (given in microsecond). The pts
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origin is defined by the stream */
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int (*read_seek)(struct AVFormatContext *, int64_t pts);
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/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
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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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/* private fields */
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struct AVInputFormat *next;
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} AVInputFormat;
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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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uint64_t time_length; /* real length of the stream in miliseconds */
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void *priv_data;
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/* internal data used in av_find_stream_info() */
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int codec_info_state;
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int codec_info_nb_repeat_frames;
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int codec_info_nb_real_frames;
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/* PTS generation when outputing stream */
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AVFrac pts;
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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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} AVStream;
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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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/* 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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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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int flags; /* format specific flags */
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/* private data for pts handling (do not modify directly) */
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int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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int pts_num, pts_den; /* value to convert to seconds */
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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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} 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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/* 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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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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/* 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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/* 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 wav_init(void);
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/* raw.c */
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int raw_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 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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#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(uint8_t *buf, int size);
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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_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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#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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int av_find_stream_info(AVFormatContext *ic);
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int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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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(AVFormatContext *s, int pts_wrap_bits,
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int pts_num, int pts_den);
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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, int stream_index, const uint8_t *buf,
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int size);
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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,
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int is_output);
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int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
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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,
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const char *path, int number);
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int filename_number_test(const char *filename);
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/* grab specific */
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int video_grab_init(void);
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int audio_init(void);
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/* DV1394 */
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int dv1394_init(void);
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#ifdef HAVE_AV_CONFIG_H
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int strstart(const char *str, const char *val, const char **ptr);
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int stristart(const char *str, const char *val, const char **ptr);
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void pstrcpy(char *buf, int buf_size, const char *str);
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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);
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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typeof(tab) _tab = (tab);\
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typeof(elem) _elem = (elem);\
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(void)sizeof(**_tab == _elem); /* check that types are compatible */\
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__dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
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} while(0)
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struct in_addr;
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int resolve_host(struct in_addr *sin_addr, const char *hostname);
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void url_split(char *proto, int proto_size,
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char *hostname, int hostname_size,
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int *port_ptr,
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char *path, int path_size,
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const char *url);
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int match_ext(const char *filename, const char *extensions);
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#endif /* HAVE_AV_CONFIG_H */
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#ifdef __cplusplus
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}
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#endif
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#endif /* AVFORMAT_H */
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