libav/avformat.h

   1 #ifndef AVFORMAT_H
   2 #define AVFORMAT_H
   3
   4 #define LIBAVFORMAT_VERSION_INT 0x000406
   5 #define LIBAVFORMAT_VERSION     "0.4.6"
   6 #define LIBAVFORMAT_BUILD       4602
   7
   8 #include "avcodec.h"
   9
  10 #include "avio.h"
  11
  12 /* packet functions */
  13
  14 #define AV_NOPTS_VALUE 0
  15
  16 typedef struct AVPacket {
  17     INT64 pts; /* presentation time stamp in stream units (set av_set_pts_info) */
  18     UINT8 *data;
  19     int size;
  20     int stream_index;
  21     int flags;
  22     int duration;
  23 #define PKT_FLAG_KEY   0x0001
  24 } AVPacket;
  25
  26 int av_new_packet(AVPacket *pkt, int size);
  27 void av_free_packet(AVPacket *pkt);
  28
  29 /*************************************************/
  30 /* fractional numbers for exact pts handling */
  31
  32 /* the exact value of the fractional number is: 'val + num / den'. num
  33    is assumed to be such as 0 <= num < den */
  34 typedef struct AVFrac {
  35     INT64 val, num, den;
  36 } AVFrac;
  37
  38 void av_frac_init(AVFrac *f, INT64 val, INT64 num, INT64 den);
  39 void av_frac_add(AVFrac *f, INT64 incr);
  40 void av_frac_set(AVFrac *f, INT64 val);
  41
  42 /*************************************************/
  43 /* input/output formats */
  44
  45 struct AVFormatContext;
  46
  47 /* this structure contains the data a format has to probe a file */
  48 typedef struct AVProbeData {
  49     char *filename;
  50     unsigned char *buf;
  51     int buf_size;
  52 } AVProbeData;
  53
  54 #define AVPROBE_SCORE_MAX 100
  55
  56 typedef struct AVFormatParameters {
  57     int frame_rate;
  58     int sample_rate;
  59     int channels;
  60     int width;
  61     int height;
  62     enum PixelFormat pix_fmt;
  63 } AVFormatParameters;
  64
  65 #define AVFMT_NOFILE        0x0001 /* no file should be opened */
  66 #define AVFMT_NEEDNUMBER    0x0002 /* needs '%d' in filename */
  67 #define AVFMT_NOHEADER      0x0004 /* signal that no header is present
  68                                       (streams are added dynamically) */
  69 #define AVFMT_SHOW_IDS      0x0008 /* show format stream IDs numbers */
  70 #define AVFMT_RGB24         0x0010 /* force RGB24 output for ppm (hack
  71                                       - need better api) */
  72 #define AVFMT_RAWPICTURE    0x0020 /* format wants AVPicture structure for
  73                                       raw picture data */
  74
  75 typedef struct AVOutputFormat {
  76     const char *name;
  77     const char *long_name;
  78     const char *mime_type;
  79     const char *extensions; /* comma separated extensions */
  80     /* size of private data so that it can be allocated in the wrapper */
  81     int priv_data_size;
  82     /* output support */
  83     enum CodecID audio_codec; /* default audio codec */
  84     enum CodecID video_codec; /* default video codec */
  85     int (*write_header)(struct AVFormatContext *);
  86     /* XXX: change prototype for 64 bit pts */
  87     int (*write_packet)(struct AVFormatContext *,
  88                         int stream_index,
  89                         unsigned char *buf, int size, int force_pts);
  90     int (*write_trailer)(struct AVFormatContext *);
  91     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
  92     int flags;
  93     /* private fields */
  94     struct AVOutputFormat *next;
  95 } AVOutputFormat;
  96
  97 typedef struct AVInputFormat {
  98     const char *name;
  99     const char *long_name;
 100     /* size of private data so that it can be allocated in the wrapper */
 101     int priv_data_size;
 102     /* tell if a given file has a chance of being parsing by this format */
 103     int (*read_probe)(AVProbeData *);
 104     /* read the format header and initialize the AVFormatContext
 105        structure. Return 0 if OK. 'ap' if non NULL contains
 106        additionnal paramters. Only used in raw format right
 107        now. 'av_new_stream' should be called to create new streams.  */
 108     int (*read_header)(struct AVFormatContext *,
 109                        AVFormatParameters *ap);
 110     /* read one packet and put it in 'pkt'. pts and flags are also
 111        set. 'av_new_stream' can be called only if the flag
 112        AVFMT_NOHEADER is used. */
 113     int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
 114     /* close the stream. The AVFormatContext and AVStreams are not
 115        freed by this function */
 116     int (*read_close)(struct AVFormatContext *);
 117     /* seek at or before a given pts (given in microsecond). The pts
 118        origin is defined by the stream */
 119     int (*read_seek)(struct AVFormatContext *, INT64 pts);
 120     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
 121     int flags;
 122     /* if extensions are defined, then no probe is done. You should
 123        usually not use extension format guessing because it is not
 124        reliable enough */
 125     const char *extensions;
 126     /* general purpose read only value that the format can use */
 127     int value;
 128     /* private fields */
 129     struct AVInputFormat *next;
 130 } AVInputFormat;
 131
 132 typedef struct AVStream {
 133     int index;    /* stream index in AVFormatContext */
 134     int id;       /* format specific stream id */
 135     AVCodecContext codec; /* codec context */
 136     int r_frame_rate;     /* real frame rate of the stream */
 137     uint64_t time_length; /* real length of the stream in miliseconds */
 138     void *priv_data;
 139     /* internal data used in av_find_stream_info() */
 140     int codec_info_state;
 141     int codec_info_nb_repeat_frames;
 142     int codec_info_nb_real_frames;
 143     /* PTS generation when outputing stream */
 144     AVFrac pts;
 145     /* ffmpeg.c private use */
 146     int stream_copy; /* if TRUE, just copy stream */
 147 } AVStream;
 148
 149 #define MAX_STREAMS 20
 150
 151 /* format I/O context */
 152 typedef struct AVFormatContext {
 153     /* can only be iformat or oformat, not both at the same time */
 154     struct AVInputFormat *iformat;
 155     struct AVOutputFormat *oformat;
 156     void *priv_data;
 157     ByteIOContext pb;
 158     int nb_streams;
 159     AVStream *streams[MAX_STREAMS];
 160     char filename[1024]; /* input or output filename */
 161     /* stream info */
 162     char title[512];
 163     char author[512];
 164     char copyright[512];
 165     char comment[512];
 166     int flags; /* format specific flags */
 167     /* private data for pts handling (do not modify directly) */
 168     int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
 169     int pts_num, pts_den; /* value to convert to seconds */
 170     /* This buffer is only needed when packets were already buffered but
 171        not decoded, for example to get the codec parameters in mpeg
 172        streams */
 173    struct AVPacketList *packet_buffer;
 174 } AVFormatContext;
 175
 176 typedef struct AVPacketList {
 177     AVPacket pkt;
 178     struct AVPacketList *next;
 179 } AVPacketList;
 180
 181 extern AVInputFormat *first_iformat;
 182 extern AVOutputFormat *first_oformat;
 183
 184 /* XXX: use automatic init with either ELF sections or C file parser */
 185 /* modules */
 186
 187 /* mpeg.c */
 188 int mpegps_init(void);
 189
 190 /* mpegts.c */
 191 extern AVInputFormat mpegts_demux;
 192 int mpegts_init(void);
 193
 194 /* rm.c */
 195 int rm_init(void);
 196
 197 /* crc.c */
 198 int crc_init(void);
 199
 200 /* img.c */
 201 int img_init(void);
 202
 203 /* asf.c */
 204 int asf_init(void);
 205
 206 /* avienc.c */
 207 int avienc_init(void);
 208
 209 /* avidec.c */
 210 int avidec_init(void);
 211
 212 /* swf.c */
 213 int swf_init(void);
 214
 215 /* mov.c */
 216 int mov_init(void);
 217
 218 /* jpeg.c */
 219 int jpeg_init(void);
 220
 221 /* gif.c */
 222 int gif_init(void);
 223
 224 /* au.c */
 225 int au_init(void);
 226
 227 /* wav.c */
 228 int wav_init(void);
 229
 230 /* raw.c */
 231 int raw_init(void);
 232
 233 /* ogg.c */
 234 int ogg_init(void);
 235
 236 /* dv.c */
 237 int dv_init(void);
 238
 239 /* ffm.c */
 240 int ffm_init(void);
 241
 242 /* rtsp.c */
 243 extern AVInputFormat redir_demux;
 244 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
 245
 246 #include "rtp.h"
 247
 248 #include "rtsp.h"
 249
 250 /* utils.c */
 251 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 252 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 253
 254 void av_register_input_format(AVInputFormat *format);
 255 void av_register_output_format(AVOutputFormat *format);
 256 AVOutputFormat *guess_stream_format(const char *short_name,
 257                                     const char *filename, const char *mime_type);
 258 AVOutputFormat *guess_format(const char *short_name,
 259                              const char *filename, const char *mime_type);
 260
 261 void av_hex_dump(UINT8 *buf, int size);
 262
 263 void av_register_all(void);
 264
 265 typedef struct FifoBuffer {
 266     UINT8 *buffer;
 267     UINT8 *rptr, *wptr, *end;
 268 } FifoBuffer;
 269
 270 int fifo_init(FifoBuffer *f, int size);
 271 void fifo_free(FifoBuffer *f);
 272 int fifo_size(FifoBuffer *f, UINT8 *rptr);
 273 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
 274 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
 275
 276 /* media file input */
 277 AVInputFormat *av_find_input_format(const char *short_name);
 278 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
 279 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
 280                        AVInputFormat *fmt,
 281                        int buf_size,
 282                        AVFormatParameters *ap);
 283
 284 #define AVERROR_UNKNOWN     (-1)  /* unknown error */
 285 #define AVERROR_IO          (-2)  /* i/o error */
 286 #define AVERROR_NUMEXPECTED (-3)  /* number syntax expected in filename */
 287 #define AVERROR_INVALIDDATA (-4)  /* invalid data found */
 288 #define AVERROR_NOMEM       (-5)  /* not enough memory */
 289 #define AVERROR_NOFMT       (-6)  /* unknown format */
 290
 291 int av_find_stream_info(AVFormatContext *ic);
 292 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 293 void av_close_input_file(AVFormatContext *s);
 294 AVStream *av_new_stream(AVFormatContext *s, int id);
 295 void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
 296                      int pts_num, int pts_den);
 297
 298 /* media file output */
 299 int av_write_header(AVFormatContext *s);
 300 int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
 301                    int size);
 302 int av_write_trailer(AVFormatContext *s);
 303
 304 void dump_format(AVFormatContext *ic,
 305                  int index,
 306                  const char *url,
 307                  int is_output);
 308 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
 309 INT64 parse_date(const char *datestr, int duration);
 310
 311 INT64 av_gettime(void);
 312
 313 /* ffm specific for ffserver */
 314 #define FFM_PACKET_SIZE 4096
 315 offset_t ffm_read_write_index(int fd);
 316 void ffm_write_write_index(int fd, offset_t pos);
 317 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
 318
 319 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 320
 321 int get_frame_filename(char *buf, int buf_size,
 322                        const char *path, int number);
 323 int filename_number_test(const char *filename);
 324
 325 /* grab specific */
 326 int video_grab_init(void);
 327 int audio_init(void);
 328
 329 extern const char *v4l_device;
 330 extern const char *audio_device;
 331
 332 #ifdef HAVE_AV_CONFIG_H
 333 int strstart(const char *str, const char *val, const char **ptr);
 334 int stristart(const char *str, const char *val, const char **ptr);
 335 void pstrcpy(char *buf, int buf_size, const char *str);
 336 char *pstrcat(char *buf, int buf_size, const char *s);
 337
 338 struct in_addr;
 339 int resolve_host(struct in_addr *sin_addr, const char *hostname);
 340
 341 void url_split(char *proto, int proto_size,
 342                char *hostname, int hostname_size,
 343                int *port_ptr,
 344                char *path, int path_size,
 345                const char *url);
 346
 347 #endif /* HAVE_AV_CONFIG_H */
 348
 349 #endif /* AVFORMAT_H */