avformat.h

gaca源码

    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);

/* mmf.c */
int ff_mmf_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);

/* ogg2.c */
int ogg_init(void);

/* ogg.c */
int libogg_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);

/* 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
#define AVSEEK_FLAG_ANY      4 ///< seek to any frame, even non keyframes

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 */