match SDP based on content instead of extension
[libav.git] / libav / avformat.h
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1#ifndef AVFORMAT_H
2#define AVFORMAT_H
de6d9b64 3
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4#define LIBAVFORMAT_VERSION_INT 0x000406
5#define LIBAVFORMAT_VERSION "0.4.6"
2a10020b 6#define LIBAVFORMAT_BUILD 4602
4b1f4f23 7
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8#include "avcodec.h"
9
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10#include "avio.h"
11
12/* packet functions */
13
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14#define AV_NOPTS_VALUE 0
15
de6d9b64 16typedef struct AVPacket {
916c80e9 17 INT64 pts; /* presentation time stamp in stream units (set av_set_pts_info) */
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18 UINT8 *data;
19 int size;
20 int stream_index;
21 int flags;
6d9872f4 22 int duration;
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23#define PKT_FLAG_KEY 0x0001
24} AVPacket;
25
26int av_new_packet(AVPacket *pkt, int size);
27void av_free_packet(AVPacket *pkt);
28
29/*************************************************/
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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 */
34typedef struct AVFrac {
35 INT64 val, num, den;
36} AVFrac;
37
38void av_frac_init(AVFrac *f, INT64 val, INT64 num, INT64 den);
39void av_frac_add(AVFrac *f, INT64 incr);
40void av_frac_set(AVFrac *f, INT64 val);
41
42/*************************************************/
b9a281db 43/* input/output formats */
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44
45struct AVFormatContext;
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46
47/* this structure contains the data a format has to probe a file */
48typedef struct AVProbeData {
49 char *filename;
50 unsigned char *buf;
51 int buf_size;
52} AVProbeData;
53
54#define AVPROBE_SCORE_MAX 100
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55
56typedef struct AVFormatParameters {
57 int frame_rate;
58 int sample_rate;
59 int channels;
60 int width;
61 int height;
4606ac8d 62 enum PixelFormat pix_fmt;
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63} AVFormatParameters;
64
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65#define AVFMT_NOFILE 0x0001 /* no file should be opened */
66#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
67#define AVFMT_NOHEADER 0x0004 /* signal that no header is present
68 (streams are added dynamically) */
69#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
70#define AVFMT_RGB24 0x0010 /* force RGB24 output for ppm (hack
71 - need better api) */
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72#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
73 raw picture data */
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74
75typedef struct AVOutputFormat {
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76 const char *name;
77 const char *long_name;
78 const char *mime_type;
79 const char *extensions; /* comma separated extensions */
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80 /* size of private data so that it can be allocated in the wrapper */
81 int priv_data_size;
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82 /* output support */
83 enum CodecID audio_codec; /* default audio codec */
84 enum CodecID video_codec; /* default video codec */
85 int (*write_header)(struct AVFormatContext *);
1e51d801 86 /* XXX: change prototype for 64 bit pts */
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87 int (*write_packet)(struct AVFormatContext *,
88 int stream_index,
10bb7023 89 unsigned char *buf, int size, int force_pts);
de6d9b64 90 int (*write_trailer)(struct AVFormatContext *);
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91 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
92 int flags;
93 /* private fields */
94 struct AVOutputFormat *next;
95} AVOutputFormat;
de6d9b64 96
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97typedef struct AVInputFormat {
98 const char *name;
99 const char *long_name;
100 /* size of private data so that it can be allocated in the wrapper */
101 int priv_data_size;
102 /* tell if a given file has a chance of being parsing by this format */
103 int (*read_probe)(AVProbeData *);
104 /* read the format header and initialize the AVFormatContext
de6d9b64 105 structure. Return 0 if OK. 'ap' if non NULL contains
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106 additionnal paramters. Only used in raw format right
107 now. 'av_new_stream' should be called to create new streams. */
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108 int (*read_header)(struct AVFormatContext *,
109 AVFormatParameters *ap);
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110 /* read one packet and put it in 'pkt'. pts and flags are also
111 set. 'av_new_stream' can be called only if the flag
112 AVFMT_NOHEADER is used. */
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113 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
114 /* close the stream. The AVFormatContext and AVStreams are not
115 freed by this function */
116 int (*read_close)(struct AVFormatContext *);
117 /* seek at or before a given pts (given in microsecond). The pts
118 origin is defined by the stream */
119 int (*read_seek)(struct AVFormatContext *, INT64 pts);
b9a281db 120 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
de6d9b64 121 int flags;
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122 /* if extensions are defined, then no probe is done. You should
123 usually not use extension format guessing because it is not
124 reliable enough */
125 const char *extensions;
126 /* general purpose read only value that the format can use */
127 int value;
128 /* private fields */
129 struct AVInputFormat *next;
130} AVInputFormat;
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131
132typedef struct AVStream {
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133 int index; /* stream index in AVFormatContext */
134 int id; /* format specific stream id */
de6d9b64 135 AVCodecContext codec; /* codec context */
76c0441b 136 int r_frame_rate; /* real frame rate of the stream */
2a10020b 137 uint64_t time_length; /* real length of the stream in miliseconds */
de6d9b64 138 void *priv_data;
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139 /* internal data used in av_find_stream_info() */
140 int codec_info_state;
141 int codec_info_nb_repeat_frames;
142 int codec_info_nb_real_frames;
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143 /* PTS generation when outputing stream */
144 AVFrac pts;
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145 /* ffmpeg.c private use */
146 int stream_copy; /* if TRUE, just copy stream */
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147} AVStream;
148
149#define MAX_STREAMS 20
150
151/* format I/O context */
152typedef struct AVFormatContext {
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153 /* can only be iformat or oformat, not both at the same time */
154 struct AVInputFormat *iformat;
155 struct AVOutputFormat *oformat;
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156 void *priv_data;
157 ByteIOContext pb;
158 int nb_streams;
159 AVStream *streams[MAX_STREAMS];
160 char filename[1024]; /* input or output filename */
161 /* stream info */
162 char title[512];
163 char author[512];
164 char copyright[512];
165 char comment[512];
92b3e125 166 int flags; /* format specific flags */
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167 /* private data for pts handling (do not modify directly) */
168 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
169 int pts_num, pts_den; /* value to convert to seconds */
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170 /* This buffer is only needed when packets were already buffered but
171 not decoded, for example to get the codec parameters in mpeg
172 streams */
173 struct AVPacketList *packet_buffer;
174} AVFormatContext;
175
176typedef struct AVPacketList {
177 AVPacket pkt;
178 struct AVPacketList *next;
179} AVPacketList;
180
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181extern AVInputFormat *first_iformat;
182extern AVOutputFormat *first_oformat;
de6d9b64 183
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184/* XXX: use automatic init with either ELF sections or C file parser */
185/* modules */
de6d9b64 186
b9a281db 187/* mpeg.c */
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188int mpegps_init(void);
189
190/* mpegts.c */
191extern AVInputFormat mpegts_demux;
192int mpegts_init(void);
de6d9b64 193
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194/* rm.c */
195int rm_init(void);
196
197/* crc.c */
198int crc_init(void);
199
200/* img.c */
201int img_init(void);
202
203/* asf.c */
204int asf_init(void);
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205
206/* avienc.c */
b9a281db 207int avienc_init(void);
de6d9b64 208
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209/* avidec.c */
210int avidec_init(void);
6cea494e 211
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212/* swf.c */
213int swf_init(void);
214
215/* mov.c */
216int mov_init(void);
de6d9b64 217
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218/* jpeg.c */
219int jpeg_init(void);
de6d9b64 220
6cea494e 221/* gif.c */
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222int gif_init(void);
223
6cea494e 224/* au.c */
b9a281db 225int au_init(void);
6cea494e 226
de6d9b64 227/* wav.c */
b9a281db 228int wav_init(void);
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229
230/* raw.c */
b9a281db 231int raw_init(void);
de6d9b64 232
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233/* ogg.c */
234int ogg_init(void);
235
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236/* dv.c */
237int dv_init(void);
238
de6d9b64 239/* ffm.c */
b9a281db 240int ffm_init(void);
de6d9b64 241
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242/* rtsp.c */
243extern AVInputFormat redir_demux;
244int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
245
246#include "rtp.h"
247
248#include "rtsp.h"
249
b9a281db 250/* utils.c */
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251#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
252#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
253
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254void av_register_input_format(AVInputFormat *format);
255void av_register_output_format(AVOutputFormat *format);
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256AVOutputFormat *guess_stream_format(const char *short_name,
257 const char *filename, const char *mime_type);
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258AVOutputFormat *guess_format(const char *short_name,
259 const char *filename, const char *mime_type);
de6d9b64 260
b9a281db 261void av_hex_dump(UINT8 *buf, int size);
de6d9b64 262
94988531 263void av_register_all(void);
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264
265typedef struct FifoBuffer {
266 UINT8 *buffer;
267 UINT8 *rptr, *wptr, *end;
268} FifoBuffer;
269
270int fifo_init(FifoBuffer *f, int size);
271void fifo_free(FifoBuffer *f);
272int fifo_size(FifoBuffer *f, UINT8 *rptr);
273int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
274void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
275
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276/* media file input */
277AVInputFormat *av_find_input_format(const char *short_name);
94988531 278AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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279int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
280 AVInputFormat *fmt,
281 int buf_size,
282 AVFormatParameters *ap);
283
284#define AVERROR_UNKNOWN (-1) /* unknown error */
285#define AVERROR_IO (-2) /* i/o error */
286#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
287#define AVERROR_INVALIDDATA (-4) /* invalid data found */
288#define AVERROR_NOMEM (-5) /* not enough memory */
289#define AVERROR_NOFMT (-6) /* unknown format */
290
291int av_find_stream_info(AVFormatContext *ic);
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292int av_read_packet(AVFormatContext *s, AVPacket *pkt);
293void av_close_input_file(AVFormatContext *s);
b9a281db 294AVStream *av_new_stream(AVFormatContext *s, int id);
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295void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
296 int pts_num, int pts_den);
de6d9b64 297
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298/* media file output */
299int av_write_header(AVFormatContext *s);
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300int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
301 int size);
b9a281db 302int av_write_trailer(AVFormatContext *s);
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303
304void dump_format(AVFormatContext *ic,
305 int index,
306 const char *url,
307 int is_output);
308int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
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309INT64 parse_date(const char *datestr, int duration);
310
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311INT64 av_gettime(void);
312
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313/* ffm specific for ffserver */
314#define FFM_PACKET_SIZE 4096
315offset_t ffm_read_write_index(int fd);
316void ffm_write_write_index(int fd, offset_t pos);
317void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
318
319int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
320
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321int get_frame_filename(char *buf, int buf_size,
322 const char *path, int number);
b9a281db 323int filename_number_test(const char *filename);
96baaa6a 324
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325/* grab specific */
326int video_grab_init(void);
327int audio_init(void);
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328
329extern const char *v4l_device;
330extern const char *audio_device;
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331
332#ifdef HAVE_AV_CONFIG_H
333int strstart(const char *str, const char *val, const char **ptr);
334int stristart(const char *str, const char *val, const char **ptr);
335void pstrcpy(char *buf, int buf_size, const char *str);
336char *pstrcat(char *buf, int buf_size, const char *s);
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337
338struct in_addr;
339int resolve_host(struct in_addr *sin_addr, const char *hostname);
340
341void url_split(char *proto, int proto_size,
342 char *hostname, int hostname_size,
343 int *port_ptr,
344 char *path, int path_size,
345 const char *url);
346
347#endif /* HAVE_AV_CONFIG_H */
348
349#endif /* AVFORMAT_H */