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;
  18     UINT8 *data;
  19     int size;
  20     int stream_index;
  21     int flags;
  22     int duration;
  23 #define PKT_FLAG_KEY   0x0001
  24 #define PKT_FLAG_DROPPED_FRAME   0x0002
  25 } AVPacket;
  26
  27 int av_new_packet(AVPacket *pkt, int size);
  28 void av_free_packet(AVPacket *pkt);
  29
  30 /*************************************************/
  31 /* input/output formats */
  32
  33 struct AVFormatContext;
  34
  35 /* this structure contains the data a format has to probe a file */
  36 typedef struct AVProbeData {
  37     char *filename;
  38     unsigned char *buf;
  39     int buf_size;
  40 } AVProbeData;
  41
  42 #define AVPROBE_SCORE_MAX 100
  43
  44 typedef struct AVFormatParameters {
  45     int frame_rate;
  46     int sample_rate;
  47     int channels;
  48     int width;
  49     int height;
  50     enum PixelFormat pix_fmt;
  51 } AVFormatParameters;
  52
  53 #define AVFMT_NOFILE        0x0001 /* no file should be opened */
  54 #define AVFMT_NEEDNUMBER    0x0002 /* needs '%d' in filename */
  55 #define AVFMT_NOHEADER      0x0004 /* signal that no header is present
  56                                       (streams are added dynamically) */
  57 #define AVFMT_SHOW_IDS      0x0008 /* show format stream IDs numbers */
  58 #define AVFMT_RGB24         0x0010 /* force RGB24 output for ppm (hack
  59                                       - need better api) */
  60 #define AVFMT_RAWPICTURE    0x0020 /* format wants AVPicture structure for
  61                                       raw picture data */
  62
  63 typedef struct AVOutputFormat {
  64     const char *name;
  65     const char *long_name;
  66     const char *mime_type;
  67     const char *extensions; /* comma separated extensions */
  68     /* size of private data so that it can be allocated in the wrapper */
  69     int priv_data_size;
  70     /* output support */
  71     enum CodecID audio_codec; /* default audio codec */
  72     enum CodecID video_codec; /* default video codec */
  73     int (*write_header)(struct AVFormatContext *);
  74     int (*write_packet)(struct AVFormatContext *,
  75                         int stream_index,
  76                         unsigned char *buf, int size, int force_pts);
  77     int (*write_trailer)(struct AVFormatContext *);
  78     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
  79     int flags;
  80     /* private fields */
  81     struct AVOutputFormat *next;
  82 } AVOutputFormat;
  83
  84 typedef struct AVInputFormat {
  85     const char *name;
  86     const char *long_name;
  87     /* size of private data so that it can be allocated in the wrapper */
  88     int priv_data_size;
  89     /* tell if a given file has a chance of being parsing by this format */
  90     int (*read_probe)(AVProbeData *);
  91     /* read the format header and initialize the AVFormatContext
  92        structure. Return 0 if OK. 'ap' if non NULL contains
  93        additionnal paramters. Only used in raw format right
  94        now. 'av_new_stream' should be called to create new streams.  */
  95     int (*read_header)(struct AVFormatContext *,
  96                        AVFormatParameters *ap);
  97     /* read one packet and put it in 'pkt'. pts and flags are also
  98        set. 'av_new_stream' can be called only if the flag
  99        AVFMT_NOHEADER is used. */
 100     int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
 101     /* close the stream. The AVFormatContext and AVStreams are not
 102        freed by this function */
 103     int (*read_close)(struct AVFormatContext *);
 104     /* seek at or before a given pts (given in microsecond). The pts
 105        origin is defined by the stream */
 106     int (*read_seek)(struct AVFormatContext *, INT64 pts);
 107     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
 108     int flags;
 109     /* if extensions are defined, then no probe is done. You should
 110        usually not use extension format guessing because it is not
 111        reliable enough */
 112     const char *extensions;
 113     /* general purpose read only value that the format can use */
 114     int value;
 115     /* private fields */
 116     struct AVInputFormat *next;
 117 } AVInputFormat;
 118
 119 typedef struct AVStream {
 120     int index;    /* stream index in AVFormatContext */
 121     int id;       /* format specific stream id */
 122     AVCodecContext codec; /* codec context */
 123     int r_frame_rate;     /* real frame rate of the stream */
 124     uint64_t time_length; /* real length of the stream in miliseconds */
 125     void* extra_data;     /* some extra data - i.e. longer WAVEFORMATEX */
 126     int extra_data_size;  /* size of extra data chunk */
 127     void *priv_data;
 128     /* internal data used in av_find_stream_info() */
 129     int codec_info_state;
 130     int codec_info_nb_repeat_frames;
 131     int codec_info_nb_real_frames;
 132     /* ffmpeg.c private use */
 133     int stream_copy; /* if TRUE, just copy stream */
 134 } AVStream;
 135
 136 #define MAX_STREAMS 20
 137
 138 /* format I/O context */
 139 typedef struct AVFormatContext {
 140     /* can only be iformat or oformat, not both at the same time */
 141     struct AVInputFormat *iformat;
 142     struct AVOutputFormat *oformat;
 143     void *priv_data;
 144     ByteIOContext pb;
 145     int nb_streams;
 146     AVStream *streams[MAX_STREAMS];
 147     char filename[1024]; /* input or output filename */
 148     /* stream info */
 149     char title[512];
 150     char author[512];
 151     char copyright[512];
 152     char comment[512];
 153     int flags; /* format specific flags */
 154     /* This buffer is only needed when packets were already buffered but
 155        not decoded, for example to get the codec parameters in mpeg
 156        streams */
 157    struct AVPacketList *packet_buffer;
 158 } AVFormatContext;
 159
 160 typedef struct AVPacketList {
 161     AVPacket pkt;
 162     struct AVPacketList *next;
 163 } AVPacketList;
 164
 165 extern AVInputFormat *first_iformat;
 166 extern AVOutputFormat *first_oformat;
 167
 168 /* XXX: use automatic init with either ELF sections or C file parser */
 169 /* modules */
 170
 171 /* mpeg.c */
 172 #define AVF_FLAG_VCD   0x00000001   /* VCD compatible MPEG-PS */
 173 int mpegps_init(void);
 174
 175 /* mpegts.c */
 176 extern AVInputFormat mpegts_demux;
 177 int mpegts_init(void);
 178
 179 /* rm.c */
 180 int rm_init(void);
 181
 182 /* crc.c */
 183 int crc_init(void);
 184
 185 /* img.c */
 186 int img_init(void);
 187
 188 /* asf.c */
 189 int asf_init(void);
 190
 191 /* avienc.c */
 192 int avienc_init(void);
 193
 194 /* avidec.c */
 195 int avidec_init(void);
 196
 197 /* swf.c */
 198 int swf_init(void);
 199
 200 /* mov.c */
 201 int mov_init(void);
 202
 203 /* jpeg.c */
 204 int jpeg_init(void);
 205
 206 /* gif.c */
 207 int gif_init(void);
 208
 209 /* au.c */
 210 int au_init(void);
 211
 212 /* wav.c */
 213 int wav_init(void);
 214
 215 /* raw.c */
 216 int raw_init(void);
 217
 218 /* ogg.c */
 219 int ogg_init(void);
 220
 221 /* dv.c */
 222 int dv_init(void);
 223
 224 /* ffm.c */
 225 int ffm_init(void);
 226
 227 /* rtsp.c */
 228 extern AVInputFormat redir_demux;
 229 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
 230
 231 #include "rtp.h"
 232
 233 #include "rtsp.h"
 234
 235 /* utils.c */
 236 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 237 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 238
 239 void av_register_input_format(AVInputFormat *format);
 240 void av_register_output_format(AVOutputFormat *format);
 241 AVOutputFormat *guess_stream_format(const char *short_name,
 242                                     const char *filename, const char *mime_type);
 243 AVOutputFormat *guess_format(const char *short_name,
 244                              const char *filename, const char *mime_type);
 245
 246 void av_hex_dump(UINT8 *buf, int size);
 247
 248 void av_register_all(void);
 249
 250 typedef struct FifoBuffer {
 251     UINT8 *buffer;
 252     UINT8 *rptr, *wptr, *end;
 253 } FifoBuffer;
 254
 255 int fifo_init(FifoBuffer *f, int size);
 256 void fifo_free(FifoBuffer *f);
 257 int fifo_size(FifoBuffer *f, UINT8 *rptr);
 258 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
 259 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
 260
 261 /* media file input */
 262 AVInputFormat *av_find_input_format(const char *short_name);
 263 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
 264 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
 265                        AVInputFormat *fmt,
 266                        int buf_size,
 267                        AVFormatParameters *ap);
 268
 269 #define AVERROR_UNKNOWN     (-1)  /* unknown error */
 270 #define AVERROR_IO          (-2)  /* i/o error */
 271 #define AVERROR_NUMEXPECTED (-3)  /* number syntax expected in filename */
 272 #define AVERROR_INVALIDDATA (-4)  /* invalid data found */
 273 #define AVERROR_NOMEM       (-5)  /* not enough memory */
 274 #define AVERROR_NOFMT       (-6)  /* unknown format */
 275
 276 int av_find_stream_info(AVFormatContext *ic);
 277 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 278 void av_close_input_file(AVFormatContext *s);
 279 AVStream *av_new_stream(AVFormatContext *s, int id);
 280
 281 /* media file output */
 282 int av_write_header(AVFormatContext *s);
 283 int av_write_packet(AVFormatContext *s, AVPacket *pkt, int force_pts);
 284 int av_write_trailer(AVFormatContext *s);
 285
 286 void dump_format(AVFormatContext *ic,
 287                  int index,
 288                  const char *url,
 289                  int is_output);
 290 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
 291 INT64 parse_date(const char *datestr, int duration);
 292
 293 INT64 av_gettime(void);
 294
 295 /* ffm specific for ffserver */
 296 #define FFM_PACKET_SIZE 4096
 297 offset_t ffm_read_write_index(int fd);
 298 void ffm_write_write_index(int fd, offset_t pos);
 299 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
 300
 301 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 302
 303 int get_frame_filename(char *buf, int buf_size,
 304                        const char *path, int number);
 305 int filename_number_test(const char *filename);
 306
 307 /* grab specific */
 308 int video_grab_init(void);
 309 int audio_init(void);
 310
 311 extern const char *v4l_device;
 312 extern const char *audio_device;
 313
 314 #ifdef HAVE_AV_CONFIG_H
 315 int strstart(const char *str, const char *val, const char **ptr);
 316 int stristart(const char *str, const char *val, const char **ptr);
 317 void pstrcpy(char *buf, int buf_size, const char *str);
 318 char *pstrcat(char *buf, int buf_size, const char *s);
 319 int match_ext(const char *filename, const char *extensions);
 320
 321 struct in_addr;
 322 int resolve_host(struct in_addr *sin_addr, const char *hostname);
 323
 324 void url_split(char *proto, int proto_size,
 325                char *hostname, int hostname_size,
 326                int *port_ptr,
 327                char *path, int path_size,
 328                const char *url);
 329
 330 #endif /* HAVE_AV_CONFIG_H */
 331
 332 #endif /* AVFORMAT_H */