libav/avformat.h

   1
   2 #include "avcodec.h"
   3
   4 #define FFMPEG_VERSION "0.4.5"
   5
   6 #include "avio.h"
   7
   8 /* packet functions */
   9
  10 typedef struct AVPacket {
  11     INT64 pts;
  12     UINT8 *data;
  13     int size;
  14     int stream_index;
  15     int flags;
  16 #define PKT_FLAG_KEY   0x0001
  17 } AVPacket;
  18
  19 int av_new_packet(AVPacket *pkt, int size);
  20 void av_free_packet(AVPacket *pkt);
  21
  22 /*************************************************/
  23 /* output formats */
  24
  25 struct AVFormatContext;
  26 struct AVFormatInputContext;
  27
  28 typedef struct AVFormatParameters {
  29     int frame_rate;
  30     int sample_rate;
  31     int channels;
  32     int width;
  33     int height;
  34     int pix_fmt;
  35 } AVFormatParameters;
  36
  37 typedef struct AVFormat {
  38     const char *name;
  39     const char *long_name;
  40     const char *mime_type;
  41     const char *extensions; /* comma separated extensions */
  42
  43     /* output support */
  44     enum CodecID audio_codec; /* default audio codec */
  45     enum CodecID video_codec; /* default video codec */
  46     int (*write_header)(struct AVFormatContext *);
  47     int (*write_packet)(struct AVFormatContext *,
  48                         int stream_index,
  49                         unsigned char *buf, int size);
  50     int (*write_trailer)(struct AVFormatContext *);
  51
  52     /* optional input support */
  53     /* read the format header and initialize the AVFormatInputContext
  54        structure. Return 0 if OK. 'ap' if non NULL contains
  55        additionnal paramters. Only used in raw format right now */
  56     int (*read_header)(struct AVFormatContext *,
  57                        AVFormatParameters *ap);
  58     /* read one packet and put it in 'pkt'. pts and flags are also set */
  59     int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
  60     /* close the stream. The AVFormatContext and AVStreams are not
  61        freed by this function */
  62     int (*read_close)(struct AVFormatContext *);
  63     /* seek at or before a given pts (given in microsecond). The pts
  64        origin is defined by the stream */
  65     int (*read_seek)(struct AVFormatContext *, INT64 pts);
  66     int flags;
  67 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
  68     struct AVFormat *next;
  69 } AVFormat;
  70
  71 typedef struct AVStream {
  72     int id;       /* internal stream id */
  73     AVCodecContext codec; /* codec context */
  74     void *priv_data;
  75 } AVStream;
  76
  77 #define MAX_STREAMS 20
  78
  79 /* format I/O context */
  80 typedef struct AVFormatContext {
  81     struct AVFormat *format;
  82     void *priv_data;
  83     ByteIOContext pb;
  84     int nb_streams;
  85     AVStream *streams[MAX_STREAMS];
  86     char filename[1024]; /* input or output filename */
  87     /* stream info */
  88     char title[512];
  89     char author[512];
  90     char copyright[512];
  91     char comment[512];
  92     /* This buffer is only needed when packets were already buffered but
  93        not decoded, for example to get the codec parameters in mpeg
  94        streams */
  95    struct AVPacketList *packet_buffer;
  96 } AVFormatContext;
  97
  98 typedef struct AVPacketList {
  99     AVPacket pkt;
 100     struct AVPacketList *next;
 101 } AVPacketList;
 102
 103 extern AVFormat *first_format;
 104
 105 /* rv10enc.c */
 106 extern AVFormat rm_format;
 107
 108 /* mpegmux.c */
 109 extern AVFormat mpeg_mux_format;
 110
 111 /* asfenc.c */
 112 extern AVFormat asf_format;
 113
 114 /* avienc.c */
 115 extern AVFormat avi_format;
 116
 117 /* jpegenc.c */
 118 extern AVFormat mpjpeg_format;
 119 extern AVFormat jpeg_format;
 120
 121 /* swfenc.c */
 122 extern AVFormat swf_format;
 123
 124 /* wav.c */
 125 extern AVFormat wav_format;
 126
 127 /* img.c */
 128 extern AVFormat pgm_format;
 129 extern AVFormat pgmyuv_format;
 130 extern AVFormat imgyuv_format;
 131 extern AVFormat pgmpipe_format;
 132
 133 /* raw.c */
 134 extern AVFormat mp2_format;
 135 extern AVFormat ac3_format;
 136 extern AVFormat h263_format;
 137 extern AVFormat mpeg1video_format;
 138 extern AVFormat pcm_format;
 139 extern AVFormat rawvideo_format;
 140
 141 /* ffm.c */
 142 extern AVFormat ffm_format;
 143
 144 /* formats.c */
 145
 146 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
 147 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
 148
 149 void register_avformat(AVFormat *format);
 150 AVFormat *guess_format(const char *short_name, const char *filename, const char *mime_type);
 151
 152 int strstart(const char *str, const char *val, const char **ptr);
 153 void nstrcpy(char *buf, int buf_size, const char *str);
 154 int match_ext(const char *filename, const char *extensions);
 155
 156 void register_all(void);
 157
 158 INT64 gettime(void);
 159
 160 typedef struct FifoBuffer {
 161     UINT8 *buffer;
 162     UINT8 *rptr, *wptr, *end;
 163 } FifoBuffer;
 164
 165 int fifo_init(FifoBuffer *f, int size);
 166 void fifo_free(FifoBuffer *f);
 167 int fifo_size(FifoBuffer *f, UINT8 *rptr);
 168 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
 169 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
 170
 171 AVFormatContext *av_open_input_file(const char *filename, int buf_size);
 172 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 173 void av_close_input_file(AVFormatContext *s);
 174
 175 int av_write_packet(AVFormatContext *s, AVPacket *pkt);
 176
 177 void dump_format(AVFormatContext *ic,
 178                  int index,
 179                  const char *url,
 180                  int is_output);
 181 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
 182 INT64 gettime(void);
 183 INT64 parse_date(const char *datestr, int duration);
 184
 185 /* ffm specific for ffserver */
 186 #define FFM_PACKET_SIZE 4096
 187 offset_t ffm_read_write_index(int fd);
 188 void ffm_write_write_index(int fd, offset_t pos);
 189 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
 190
 191 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 192