grab device is in AVFormatParameter (at least better than global variable)
[libav.git] / libavformat / 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 4603
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 struct AVImageFormat *image_format;
64 int channel; /* used to select dv channel */
65 const char *device; /* video4linux, audio or DV device */
66 } AVFormatParameters;
67
68 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
69 #define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
70 #define AVFMT_NOHEADER 0x0004 /* signal that no header is present
71 (streams are added dynamically) */
72 #define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
73 #define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
74 raw picture data */
75
76 typedef struct AVOutputFormat {
77 const char *name;
78 const char *long_name;
79 const char *mime_type;
80 const char *extensions; /* comma separated extensions */
81 /* size of private data so that it can be allocated in the wrapper */
82 int priv_data_size;
83 /* output support */
84 enum CodecID audio_codec; /* default audio codec */
85 enum CodecID video_codec; /* default video codec */
86 int (*write_header)(struct AVFormatContext *);
87 /* XXX: change prototype for 64 bit pts */
88 int (*write_packet)(struct AVFormatContext *,
89 int stream_index,
90 unsigned char *buf, int size, int force_pts);
91 int (*write_trailer)(struct AVFormatContext *);
92 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
93 int flags;
94 /* currently only used to set pixel format if not YUV420P */
95 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
96 /* private fields */
97 struct AVOutputFormat *next;
98 } AVOutputFormat;
99
100 typedef struct AVInputFormat {
101 const char *name;
102 const char *long_name;
103 /* size of private data so that it can be allocated in the wrapper */
104 int priv_data_size;
105 /* tell if a given file has a chance of being parsing by this format */
106 int (*read_probe)(AVProbeData *);
107 /* read the format header and initialize the AVFormatContext
108 structure. Return 0 if OK. 'ap' if non NULL contains
109 additionnal paramters. Only used in raw format right
110 now. 'av_new_stream' should be called to create new streams. */
111 int (*read_header)(struct AVFormatContext *,
112 AVFormatParameters *ap);
113 /* read one packet and put it in 'pkt'. pts and flags are also
114 set. 'av_new_stream' can be called only if the flag
115 AVFMT_NOHEADER is used. */
116 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
117 /* close the stream. The AVFormatContext and AVStreams are not
118 freed by this function */
119 int (*read_close)(struct AVFormatContext *);
120 /* seek at or before a given pts (given in microsecond). The pts
121 origin is defined by the stream */
122 int (*read_seek)(struct AVFormatContext *, INT64 pts);
123 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
124 int flags;
125 /* if extensions are defined, then no probe is done. You should
126 usually not use extension format guessing because it is not
127 reliable enough */
128 const char *extensions;
129 /* general purpose read only value that the format can use */
130 int value;
131 /* private fields */
132 struct AVInputFormat *next;
133 } AVInputFormat;
134
135 typedef struct AVStream {
136 int index; /* stream index in AVFormatContext */
137 int id; /* format specific stream id */
138 AVCodecContext codec; /* codec context */
139 int r_frame_rate; /* real frame rate of the stream */
140 uint64_t time_length; /* real length of the stream in miliseconds */
141 void *priv_data;
142 /* internal data used in av_find_stream_info() */
143 int codec_info_state;
144 int codec_info_nb_repeat_frames;
145 int codec_info_nb_real_frames;
146 /* PTS generation when outputing stream */
147 AVFrac pts;
148 /* ffmpeg.c private use */
149 int stream_copy; /* if TRUE, just copy stream */
150 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
151 * MN:dunno if thats the right place, for it */
152 float quality;
153 } AVStream;
154
155 #define MAX_STREAMS 20
156
157 /* format I/O context */
158 typedef struct AVFormatContext {
159 /* can only be iformat or oformat, not both at the same time */
160 struct AVInputFormat *iformat;
161 struct AVOutputFormat *oformat;
162 void *priv_data;
163 ByteIOContext pb;
164 int nb_streams;
165 AVStream *streams[MAX_STREAMS];
166 char filename[1024]; /* input or output filename */
167 /* stream info */
168 char title[512];
169 char author[512];
170 char copyright[512];
171 char comment[512];
172 int flags; /* format specific flags */
173 /* private data for pts handling (do not modify directly) */
174 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
175 int pts_num, pts_den; /* value to convert to seconds */
176 /* This buffer is only needed when packets were already buffered but
177 not decoded, for example to get the codec parameters in mpeg
178 streams */
179 struct AVPacketList *packet_buffer;
180 } AVFormatContext;
181
182 typedef struct AVPacketList {
183 AVPacket pkt;
184 struct AVPacketList *next;
185 } AVPacketList;
186
187 extern AVInputFormat *first_iformat;
188 extern AVOutputFormat *first_oformat;
189
190 /* still image support */
191 struct AVInputImageContext;
192 typedef struct AVInputImageContext AVInputImageContext;
193
194 typedef struct AVImageInfo {
195 enum PixelFormat pix_fmt; /* requested pixel format */
196 int width; /* requested width */
197 int height; /* requested height */
198 AVPicture pict; /* returned allocated image */
199 } AVImageInfo;
200
201 typedef struct AVImageFormat {
202 const char *name;
203 const char *extensions;
204 /* tell if a given file has a chance of being parsing by this format */
205 int (*img_probe)(AVProbeData *);
206 /* read a whole image. 'alloc_cb' is called when the image size is
207 known so that the caller can allocate the image. If 'allo_cb'
208 returns non zero, then the parsing is aborted. Return '0' if
209 OK. */
210 int (*img_read)(ByteIOContext *,
211 int (*alloc_cb)(void *, AVImageInfo *info), void *);
212 /* write the image */
213 int supported_pixel_formats; /* mask of supported formats for output */
214 int (*img_write)(ByteIOContext *, AVImageInfo *);
215 struct AVImageFormat *next;
216 } AVImageFormat;
217
218 void av_register_image_format(AVImageFormat *img_fmt);
219 AVImageFormat *av_probe_image_format(AVProbeData *pd);
220 AVImageFormat *guess_image_format(const char *filename);
221 int av_read_image(ByteIOContext *pb, const char *filename,
222 AVImageFormat *fmt,
223 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
224 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
225
226 extern AVImageFormat *first_image_format;
227
228 extern AVImageFormat pnm_image_format;
229 extern AVImageFormat pbm_image_format;
230 extern AVImageFormat pgm_image_format;
231 extern AVImageFormat ppm_image_format;
232 extern AVImageFormat pgmyuv_image_format;
233 extern AVImageFormat yuv_image_format;
234
235 /* XXX: use automatic init with either ELF sections or C file parser */
236 /* modules */
237
238 /* mpeg.c */
239 int mpegps_init(void);
240
241 /* mpegts.c */
242 extern AVInputFormat mpegts_demux;
243 int mpegts_init(void);
244
245 /* rm.c */
246 int rm_init(void);
247
248 /* crc.c */
249 int crc_init(void);
250
251 /* img.c */
252 int img_init(void);
253
254 /* asf.c */
255 int asf_init(void);
256
257 /* avienc.c */
258 int avienc_init(void);
259
260 /* avidec.c */
261 int avidec_init(void);
262
263 /* swf.c */
264 int swf_init(void);
265
266 /* mov.c */
267 int mov_init(void);
268
269 /* jpeg.c */
270 int jpeg_init(void);
271
272 /* gif.c */
273 int gif_init(void);
274
275 /* au.c */
276 int au_init(void);
277
278 /* wav.c */
279 int wav_init(void);
280
281 /* raw.c */
282 int raw_init(void);
283
284 /* ogg.c */
285 int ogg_init(void);
286
287 /* dv.c */
288 int dv_init(void);
289
290 /* ffm.c */
291 int ffm_init(void);
292
293 /* rtsp.c */
294 extern AVInputFormat redir_demux;
295 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
296
297 #include "rtp.h"
298
299 #include "rtsp.h"
300
301 /* yuv4mpeg.c */
302 extern AVOutputFormat yuv4mpegpipe_oformat;
303
304 /* utils.c */
305 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
306 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
307
308 void av_register_input_format(AVInputFormat *format);
309 void av_register_output_format(AVOutputFormat *format);
310 AVOutputFormat *guess_stream_format(const char *short_name,
311 const char *filename, const char *mime_type);
312 AVOutputFormat *guess_format(const char *short_name,
313 const char *filename, const char *mime_type);
314
315 void av_hex_dump(UINT8 *buf, int size);
316
317 void av_register_all(void);
318
319 typedef struct FifoBuffer {
320 UINT8 *buffer;
321 UINT8 *rptr, *wptr, *end;
322 } FifoBuffer;
323
324 int fifo_init(FifoBuffer *f, int size);
325 void fifo_free(FifoBuffer *f);
326 int fifo_size(FifoBuffer *f, UINT8 *rptr);
327 int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
328 void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
329
330 /* media file input */
331 AVInputFormat *av_find_input_format(const char *short_name);
332 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
333 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
334 AVInputFormat *fmt,
335 int buf_size,
336 AVFormatParameters *ap);
337
338 #define AVERROR_UNKNOWN (-1) /* unknown error */
339 #define AVERROR_IO (-2) /* i/o error */
340 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
341 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
342 #define AVERROR_NOMEM (-5) /* not enough memory */
343 #define AVERROR_NOFMT (-6) /* unknown format */
344
345 int av_find_stream_info(AVFormatContext *ic);
346 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
347 void av_close_input_file(AVFormatContext *s);
348 AVStream *av_new_stream(AVFormatContext *s, int id);
349 void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
350 int pts_num, int pts_den);
351
352 /* media file output */
353 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
354 int av_write_header(AVFormatContext *s);
355 int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
356 int size);
357 int av_write_trailer(AVFormatContext *s);
358
359 void dump_format(AVFormatContext *ic,
360 int index,
361 const char *url,
362 int is_output);
363 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
364 INT64 parse_date(const char *datestr, int duration);
365
366 INT64 av_gettime(void);
367
368 /* ffm specific for ffserver */
369 #define FFM_PACKET_SIZE 4096
370 offset_t ffm_read_write_index(int fd);
371 void ffm_write_write_index(int fd, offset_t pos);
372 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
373
374 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
375
376 int get_frame_filename(char *buf, int buf_size,
377 const char *path, int number);
378 int filename_number_test(const char *filename);
379
380 /* grab specific */
381 int video_grab_init(void);
382 int audio_init(void);
383
384 /* DV1394 */
385 int dv1394_init(void);
386
387 #ifdef HAVE_AV_CONFIG_H
388 int strstart(const char *str, const char *val, const char **ptr);
389 int stristart(const char *str, const char *val, const char **ptr);
390 void pstrcpy(char *buf, int buf_size, const char *str);
391 char *pstrcat(char *buf, int buf_size, const char *s);
392
393 struct in_addr;
394 int resolve_host(struct in_addr *sin_addr, const char *hostname);
395
396 void url_split(char *proto, int proto_size,
397 char *hostname, int hostname_size,
398 int *port_ptr,
399 char *path, int path_size,
400 const char *url);
401
402 int match_ext(const char *filename, const char *extensions);
403
404 #endif /* HAVE_AV_CONFIG_H */
405
406 #endif /* AVFORMAT_H */