libav/avformat.h

   1
   2 #define LIBAV_VERSION_INT 0x000406
   3 #define LIBAV_VERSION     "0.4.6"
   4 #define LIBAV_BUILD       4601
   5
   6 #include "avcodec.h"
   7
   8 #include "avio.h"
   9
  10 /* packet functions */
  11
  12 typedef struct AVPacket {
  13     INT64 pts;
  14     UINT8 *data;
  15     int size;
  16     int stream_index;
  17     int flags;
  18     int duration;
  19 #define PKT_FLAG_KEY   0x0001
  20 #define PKT_FLAG_DROPPED_FRAME   0x0002
  21 } AVPacket;
  22
  23 int av_new_packet(AVPacket *pkt, int size);
  24 void av_free_packet(AVPacket *pkt);
  25
  26 /*************************************************/
  27 /* input/output formats */
  28
  29 struct AVFormatContext;
  30
  31 /* this structure contains the data a format has to probe a file */
  32 typedef struct AVProbeData {
  33     char *filename;
  34     unsigned char *buf;
  35     int buf_size;
  36 } AVProbeData;
  37
  38 #define AVPROBE_SCORE_MAX 100
  39
  40 typedef struct AVFormatParameters {
  41     int frame_rate;
  42     int sample_rate;
  43     int channels;
  44     int width;
  45     int height;
  46     enum PixelFormat pix_fmt;
  47 } AVFormatParameters;
  48
  49 #define AVFMT_NOFILE        0x0001 /* no file should be opened */
  50 #define AVFMT_NEEDNUMBER    0x0002 /* needs '%d' in filename */
  51 #define AVFMT_NOHEADER      0x0004 /* signal that no header is present
  52                                       (streams are added dynamically) */
  53 #define AVFMT_SHOW_IDS      0x0008 /* show format stream IDs numbers */
  54 #define AVFMT_RGB24         0x0010 /* force RGB24 output for ppm (hack
  55                                       - need better api) */
  56
  57 typedef struct AVOutputFormat {
  58     const char *name;
  59     const char *long_name;
  60     const char *mime_type;
  61     const char *extensions; /* comma separated extensions */
  62     /* size of private data so that it can be allocated in the wrapper */
  63     int priv_data_size;
  64     /* output support */
  65     enum CodecID audio_codec; /* default audio codec */
  66     enum CodecID video_codec; /* default video codec */
  67     int (*write_header)(struct AVFormatContext *);
  68     int (*write_packet)(struct AVFormatContext *,
  69                         int stream_index,
  70                         unsigned char *buf, int size, int force_pts);
  71     int (*write_trailer)(struct AVFormatContext *);
  72     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
  73     int flags;
  74     /* private fields */
  75     struct AVOutputFormat *next;
  76 } AVOutputFormat;
  77
  78 typedef struct AVInputFormat {
  79     const char *name;
  80     const char *long_name;
  81     /* size of private data so that it can be allocated in the wrapper */
  82     int priv_data_size;
  83     /* tell if a given file has a chance of being parsing by this format */
  84     int (*read_probe)(AVProbeData *);
  85     /* read the format header and initialize the AVFormatContext
  86        structure. Return 0 if OK. 'ap' if non NULL contains
  87        additionnal paramters. Only used in raw format right
  88        now. 'av_new_stream' should be called to create new streams.  */
  89     int (*read_header)(struct AVFormatContext *,
  90                        AVFormatParameters *ap);
  91     /* read one packet and put it in 'pkt'. pts and flags are also
  92        set. 'av_new_stream' can be called only if the flag
  93        AVFMT_NOHEADER is used. */
  94     int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
  95     /* close the stream. The AVFormatContext and AVStreams are not
  96        freed by this function */
  97     int (*read_close)(struct AVFormatContext *);
  98     /* seek at or before a given pts (given in microsecond). The pts
  99        origin is defined by the stream */
 100     int (*read_seek)(struct AVFormatContext *, INT64 pts);
 101     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
 102     int flags;
 103     /* if extensions are defined, then no probe is done. You should
 104        usually not use extension format guessing because it is not
 105        reliable enough */
 106     const char *extensions;
 107     /* general purpose read only value that the format can use */
 108     int value;
 109     /* private fields */
 110     struct AVInputFormat *next;
 111 } AVInputFormat;
 112
 113 typedef struct AVStream {
 114     int index;    /* stream index in AVFormatContext */
 115     int id;       /* format specific stream id */
 116     AVCodecContext codec; /* codec context */
 117     int r_frame_rate;     /* real frame rate of the stream */
 118     void *priv_data;
 119     /* internal data used in av_find_stream_info() */
 120     int codec_info_state;
 121     int codec_info_nb_repeat_frames;
 122     int codec_info_nb_real_frames;
 123 } AVStream;
 124
 125 #define MAX_STREAMS 20
 126
 127 /* format I/O context */
 128 typedef struct AVFormatContext {
 129     /* can only be iformat or oformat, not both at the same time */
 130     struct AVInputFormat *iformat;
 131     struct AVOutputFormat *oformat;
 132     void *priv_data;
 133     ByteIOContext pb;
 134     int nb_streams;
 135     AVStream *streams[MAX_STREAMS];
 136     char filename[1024]; /* input or output filename */
 137     /* stream info */
 138     char title[512];
 139     char author[512];
 140     char copyright[512];
 141     char comment[512];
 142     int flags; /* format specific flags */
 143     /* This buffer is only needed when packets were already buffered but
 144        not decoded, for example to get the codec parameters in mpeg
 145        streams */
 146    struct AVPacketList *packet_buffer;
 147 } AVFormatContext;
 148
 149 typedef struct AVPacketList {
 150     AVPacket pkt;
 151     struct AVPacketList *next;
 152 } AVPacketList;
 153
 154 extern AVInputFormat *first_iformat;
 155 extern AVOutputFormat *first_oformat;
 156
 157 /* XXX: use automatic init with either ELF sections or C file parser */
 158 /* modules */
 159
 160 /* mpeg.c */
 161 #define AVF_FLAG_VCD   0x00000001   /* VCD compatible MPEG-PS */
 162 int mpegps_init(void);
 163
 164 /* mpegts.c */
 165 extern AVInputFormat mpegts_demux;
 166 int mpegts_init(void);
 167
 168 /* rm.c */
 169 int rm_init(void);
 170
 171 /* crc.c */
 172 int crc_init(void);
 173
 174 /* img.c */
 175 int img_init(void);
 176
 177 /* asf.c */
 178 int asf_init(void);
 179
 180 /* avienc.c */
 181 int avienc_init(void);
 182
 183 /* avidec.c */
 184 int avidec_init(void);
 185
 186 /* swf.c */
 187 int swf_init(void);
 188
 189 /* mov.c */
 190 int mov_init(void);
 191
 192 /* jpeg.c */
 193 int jpeg_init(void);
 194
 195 /* gif.c */
 196 int gif_init(void);
 197
 198 /* au.c */
 199 int au_init(void);
 200
 201 /* wav.c */
 202 int wav_init(void);
 203
 204 /* raw.c */
 205 int raw_init(void);
 206
 207 /* ffm.c */
 208 int ffm_init(void);
 209
 210 /* utils.c */
 211 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 212 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 213
 214 void av_register_input_format(AVInputFormat *format);
 215 void av_register_output_format(AVOutputFormat *format);
 216 AVOutputFormat *guess_format(const char *short_name,
 217                              const char *filename, const char *mime_type);
 218
 219 int strstart(const char *str, const char *val, const char **ptr);
 220 void pstrcpy(char *buf, int buf_size, const char *str);
 221
 222 int match_ext(const char *filename, const char *extensions);
 223 void av_hex_dump(UINT8 *buf, int size);
 224
 225 void register_all(void);
 226
 227 INT64 gettime(void);
 228
 229 typedef struct FifoBuffer {
 230     UINT8 *buffer;
 231     UINT8 *rptr, *wptr, *end;
 232 } FifoBuffer;
 233
 234 int fifo_init(FifoBuffer *f, int size);
 235 void fifo_free(FifoBuffer *f);
 236 int fifo_size(FifoBuffer *f, UINT8 *rptr);
 237 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
 238 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
 239
 240 /* media file input */
 241 AVInputFormat *av_find_input_format(const char *short_name);
 242 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
 243                        AVInputFormat *fmt,
 244                        int buf_size,
 245                        AVFormatParameters *ap);
 246
 247 #define AVERROR_UNKNOWN     (-1)  /* unknown error */
 248 #define AVERROR_IO          (-2)  /* i/o error */
 249 #define AVERROR_NUMEXPECTED (-3)  /* number syntax expected in filename */
 250 #define AVERROR_INVALIDDATA (-4)  /* invalid data found */
 251 #define AVERROR_NOMEM       (-5)  /* not enough memory */
 252 #define AVERROR_NOFMT       (-6)  /* unknown format */
 253
 254 int av_find_stream_info(AVFormatContext *ic);
 255 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 256 void av_close_input_file(AVFormatContext *s);
 257 AVStream *av_new_stream(AVFormatContext *s, int id);
 258
 259 /* media file output */
 260 int av_write_header(AVFormatContext *s);
 261 int av_write_packet(AVFormatContext *s, AVPacket *pkt, int force_pts);
 262 int av_write_trailer(AVFormatContext *s);
 263
 264 void dump_format(AVFormatContext *ic,
 265                  int index,
 266                  const char *url,
 267                  int is_output);
 268 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
 269 INT64 parse_date(const char *datestr, int duration);
 270
 271 /* ffm specific for ffserver */
 272 #define FFM_PACKET_SIZE 4096
 273 offset_t ffm_read_write_index(int fd);
 274 void ffm_write_write_index(int fd, offset_t pos);
 275 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
 276
 277 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 278
 279 int get_frame_filename(char *buf, int buf_size,
 280                        const char *path, int number);
 281 int filename_number_test(const char *filename);
 282
 283 /* grab specific */
 284 int video_grab_init(void);
 285 int audio_init(void);
 286
 287 extern const char *v4l_device;
 288 extern const char *audio_device;