libav/avformat.h

   1 #ifndef AVFORMAT_H
   2 #define AVFORMAT_H
   3
   4 #define LIBAV_VERSION_INT 0x000406
   5 #define LIBAV_VERSION     "0.4.6"
   6 #define LIBAV_BUILD       4601
   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     void *priv_data;
 125     /* internal data used in av_find_stream_info() */
 126     int codec_info_state;
 127     int codec_info_nb_repeat_frames;
 128     int codec_info_nb_real_frames;
 129 } AVStream;
 130
 131 #define MAX_STREAMS 20
 132
 133 /* format I/O context */
 134 typedef struct AVFormatContext {
 135     /* can only be iformat or oformat, not both at the same time */
 136     struct AVInputFormat *iformat;
 137     struct AVOutputFormat *oformat;
 138     void *priv_data;
 139     ByteIOContext pb;
 140     int nb_streams;
 141     AVStream *streams[MAX_STREAMS];
 142     char filename[1024]; /* input or output filename */
 143     /* stream info */
 144     char title[512];
 145     char author[512];
 146     char copyright[512];
 147     char comment[512];
 148     int flags; /* format specific flags */
 149     /* This buffer is only needed when packets were already buffered but
 150        not decoded, for example to get the codec parameters in mpeg
 151        streams */
 152    struct AVPacketList *packet_buffer;
 153 } AVFormatContext;
 154
 155 typedef struct AVPacketList {
 156     AVPacket pkt;
 157     struct AVPacketList *next;
 158 } AVPacketList;
 159
 160 extern AVInputFormat *first_iformat;
 161 extern AVOutputFormat *first_oformat;
 162
 163 /* XXX: use automatic init with either ELF sections or C file parser */
 164 /* modules */
 165
 166 /* mpeg.c */
 167 #define AVF_FLAG_VCD   0x00000001   /* VCD compatible MPEG-PS */
 168 int mpegps_init(void);
 169
 170 /* mpegts.c */
 171 extern AVInputFormat mpegts_demux;
 172 int mpegts_init(void);
 173
 174 /* rm.c */
 175 int rm_init(void);
 176
 177 /* crc.c */
 178 int crc_init(void);
 179
 180 /* img.c */
 181 int img_init(void);
 182
 183 /* asf.c */
 184 int asf_init(void);
 185
 186 /* avienc.c */
 187 int avienc_init(void);
 188
 189 /* avidec.c */
 190 int avidec_init(void);
 191
 192 /* swf.c */
 193 int swf_init(void);
 194
 195 /* mov.c */
 196 int mov_init(void);
 197
 198 /* jpeg.c */
 199 int jpeg_init(void);
 200
 201 /* gif.c */
 202 int gif_init(void);
 203
 204 /* au.c */
 205 int au_init(void);
 206
 207 /* wav.c */
 208 int wav_init(void);
 209
 210 /* raw.c */
 211 int raw_init(void);
 212
 213 /* ffm.c */
 214 int ffm_init(void);
 215
 216 /* rtsp.c */
 217 extern AVInputFormat redir_demux;
 218 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
 219
 220 #include "rtp.h"
 221
 222 #include "rtsp.h"
 223
 224 /* utils.c */
 225 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 226 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 227
 228 void av_register_input_format(AVInputFormat *format);
 229 void av_register_output_format(AVOutputFormat *format);
 230 AVOutputFormat *guess_format(const char *short_name,
 231                              const char *filename, const char *mime_type);
 232
 233 void av_hex_dump(UINT8 *buf, int size);
 234
 235 void register_all(void);
 236
 237 INT64 gettime(void);
 238
 239 typedef struct FifoBuffer {
 240     UINT8 *buffer;
 241     UINT8 *rptr, *wptr, *end;
 242 } FifoBuffer;
 243
 244 int fifo_init(FifoBuffer *f, int size);
 245 void fifo_free(FifoBuffer *f);
 246 int fifo_size(FifoBuffer *f, UINT8 *rptr);
 247 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
 248 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
 249
 250 /* media file input */
 251 AVInputFormat *av_find_input_format(const char *short_name);
 252 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
 253                        AVInputFormat *fmt,
 254                        int buf_size,
 255                        AVFormatParameters *ap);
 256
 257 #define AVERROR_UNKNOWN     (-1)  /* unknown error */
 258 #define AVERROR_IO          (-2)  /* i/o error */
 259 #define AVERROR_NUMEXPECTED (-3)  /* number syntax expected in filename */
 260 #define AVERROR_INVALIDDATA (-4)  /* invalid data found */
 261 #define AVERROR_NOMEM       (-5)  /* not enough memory */
 262 #define AVERROR_NOFMT       (-6)  /* unknown format */
 263
 264 int av_find_stream_info(AVFormatContext *ic);
 265 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 266 void av_close_input_file(AVFormatContext *s);
 267 AVStream *av_new_stream(AVFormatContext *s, int id);
 268
 269 /* media file output */
 270 int av_write_header(AVFormatContext *s);
 271 int av_write_packet(AVFormatContext *s, AVPacket *pkt, int force_pts);
 272 int av_write_trailer(AVFormatContext *s);
 273
 274 void dump_format(AVFormatContext *ic,
 275                  int index,
 276                  const char *url,
 277                  int is_output);
 278 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
 279 INT64 parse_date(const char *datestr, int duration);
 280
 281 /* ffm specific for ffserver */
 282 #define FFM_PACKET_SIZE 4096
 283 offset_t ffm_read_write_index(int fd);
 284 void ffm_write_write_index(int fd, offset_t pos);
 285 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
 286
 287 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 288
 289 int get_frame_filename(char *buf, int buf_size,
 290                        const char *path, int number);
 291 int filename_number_test(const char *filename);
 292
 293 /* grab specific */
 294 int video_grab_init(void);
 295 int audio_init(void);
 296
 297 extern const char *v4l_device;
 298 extern const char *audio_device;
 299
 300 #ifdef HAVE_AV_CONFIG_H
 301 int strstart(const char *str, const char *val, const char **ptr);
 302 int stristart(const char *str, const char *val, const char **ptr);
 303 void pstrcpy(char *buf, int buf_size, const char *str);
 304 char *pstrcat(char *buf, int buf_size, const char *s);
 305 int match_ext(const char *filename, const char *extensions);
 306
 307 struct in_addr;
 308 int resolve_host(struct in_addr *sin_addr, const char *hostname);
 309
 310 void url_split(char *proto, int proto_size,
 311                char *hostname, int hostname_size,
 312                int *port_ptr,
 313                char *path, int path_size,
 314                const char *url);
 315
 316 #endif /* HAVE_AV_CONFIG_H */
 317
 318 #endif /* AVFORMAT_H */