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[libav.git] / libavformat / avformat.h
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1#ifndef AVFORMAT_H
2#define AVFORMAT_H
de6d9b64 3
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4#ifdef __cplusplus
5extern "C" {
6#endif
7
c0df9d75 8#define LIBAVFORMAT_BUILD 4624
8026c3b5 9
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10#define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
11#define LIBAVFORMAT_VERSION FFMPEG_VERSION
12#define LIBAVFORMAT_IDENT "FFmpeg" FFMPEG_VERSION "b" AV_STRINGIFY(LIBAVFORMAT_BUILD)
4b1f4f23 13
f71869a4 14#include <time.h>
67070e4f 15#include <stdio.h> /* FILE */
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16#include "avcodec.h"
17
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18#include "avio.h"
19
20/* packet functions */
21
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22#ifndef MAXINT64
23#define MAXINT64 int64_t_C(0x7fffffffffffffff)
24#endif
25
26#ifndef MININT64
27#define MININT64 int64_t_C(0x8000000000000000)
28#endif
29
de6d9b64 30typedef struct AVPacket {
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31 int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
32 pts_den units in muxers or demuxers) */
33 int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
34 pts_den units in muxers or demuxers) */
0c1a9eda 35 uint8_t *data;
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36 int size;
37 int stream_index;
38 int flags;
fb2758c8 39 int duration; /* presentation duration (0 if not available) */
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40 void (*destruct)(struct AVPacket *);
41 void *priv;
de6d9b64 42} AVPacket;
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43#define PKT_FLAG_KEY 0x0001
44
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45void av_destruct_packet_nofree(AVPacket *pkt);
46
da24c5e3 47/* initialize optional fields of a packet */
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48static inline void av_init_packet(AVPacket *pkt)
49{
50 pkt->pts = AV_NOPTS_VALUE;
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51 pkt->dts = AV_NOPTS_VALUE;
52 pkt->duration = 0;
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53 pkt->flags = 0;
54 pkt->stream_index = 0;
63dd1377 55 pkt->destruct= av_destruct_packet_nofree;
6fa5a56c 56}
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57
58int av_new_packet(AVPacket *pkt, int size);
fb2758c8 59int av_dup_packet(AVPacket *pkt);
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60
61/**
62 * Free a packet
63 *
64 * @param pkt packet to free
65 */
66static inline void av_free_packet(AVPacket *pkt)
67{
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68 if (pkt && pkt->destruct) {
69 pkt->destruct(pkt);
70 }
6fa5a56c 71}
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72
73/*************************************************/
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74/* fractional numbers for exact pts handling */
75
76/* the exact value of the fractional number is: 'val + num / den'. num
77 is assumed to be such as 0 <= num < den */
78typedef struct AVFrac {
0c1a9eda 79 int64_t val, num, den;
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80} AVFrac;
81
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82void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
83void av_frac_add(AVFrac *f, int64_t incr);
84void av_frac_set(AVFrac *f, int64_t val);
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85
86/*************************************************/
b9a281db 87/* input/output formats */
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88
89struct AVFormatContext;
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90
91/* this structure contains the data a format has to probe a file */
92typedef struct AVProbeData {
5c91a675 93 const char *filename;
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94 unsigned char *buf;
95 int buf_size;
96} AVProbeData;
97
98#define AVPROBE_SCORE_MAX 100
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99
100typedef struct AVFormatParameters {
c0df9d75 101 AVRational time_base;
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102 int sample_rate;
103 int channels;
104 int width;
105 int height;
4606ac8d 106 enum PixelFormat pix_fmt;
290c5fa6 107 struct AVImageFormat *image_format;
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108 int channel; /* used to select dv channel */
109 const char *device; /* video4linux, audio or DV device */
e3ee3283 110 const char *standard; /* tv standard, NTSC, PAL, SECAM */
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111 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
112 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
113 stream packet (only meaningful if
114 mpeg2ts_raw is TRUE */
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115 int initial_pause:1; /* do not begin to play the stream
116 immediately (RTSP only) */
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117 enum CodecID video_codec_id;
118 enum CodecID audio_codec_id;
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119} AVFormatParameters;
120
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121#define AVFMT_NOFILE 0x0001 /* no file should be opened */
122#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 123#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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124#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
125 raw picture data */
c64d476c 126#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
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127
128typedef struct AVOutputFormat {
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129 const char *name;
130 const char *long_name;
131 const char *mime_type;
132 const char *extensions; /* comma separated extensions */
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133 /* size of private data so that it can be allocated in the wrapper */
134 int priv_data_size;
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135 /* output support */
136 enum CodecID audio_codec; /* default audio codec */
137 enum CodecID video_codec; /* default video codec */
138 int (*write_header)(struct AVFormatContext *);
e928649b 139 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 140 int (*write_trailer)(struct AVFormatContext *);
c64d476c 141 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 142 int flags;
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143 /* currently only used to set pixel format if not YUV420P */
144 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
fe2d6fe2 145 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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146 /* private fields */
147 struct AVOutputFormat *next;
148} AVOutputFormat;
de6d9b64 149
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150typedef struct AVInputFormat {
151 const char *name;
152 const char *long_name;
153 /* size of private data so that it can be allocated in the wrapper */
154 int priv_data_size;
155 /* tell if a given file has a chance of being parsing by this format */
156 int (*read_probe)(AVProbeData *);
157 /* read the format header and initialize the AVFormatContext
de6d9b64 158 structure. Return 0 if OK. 'ap' if non NULL contains
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159 additionnal paramters. Only used in raw format right
160 now. 'av_new_stream' should be called to create new streams. */
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161 int (*read_header)(struct AVFormatContext *,
162 AVFormatParameters *ap);
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163 /* read one packet and put it in 'pkt'. pts and flags are also
164 set. 'av_new_stream' can be called only if the flag
da24c5e3 165 AVFMTCTX_NOHEADER is used. */
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166 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
167 /* close the stream. The AVFormatContext and AVStreams are not
168 freed by this function */
169 int (*read_close)(struct AVFormatContext *);
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170 /**
171 * seek to a given timestamp relative to the frames in
172 * stream component stream_index
173 * @param stream_index must not be -1
174 * @param flags selects which direction should be preferred if no exact
175 * match is available
176 */
fb2758c8 177 int (*read_seek)(struct AVFormatContext *,
3ba1438d 178 int stream_index, int64_t timestamp, int flags);
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179 /**
180 * gets the next timestamp in AV_TIME_BASE units.
181 */
182 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
183 int64_t *pos, int64_t pos_limit);
da24c5e3 184 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 185 int flags;
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186 /* if extensions are defined, then no probe is done. You should
187 usually not use extension format guessing because it is not
188 reliable enough */
189 const char *extensions;
190 /* general purpose read only value that the format can use */
191 int value;
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192
193 /* start/resume playing - only meaningful if using a network based format
194 (RTSP) */
195 int (*read_play)(struct AVFormatContext *);
196
197 /* pause playing - only meaningful if using a network based format
198 (RTSP) */
199 int (*read_pause)(struct AVFormatContext *);
200
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201 /* private fields */
202 struct AVInputFormat *next;
203} AVInputFormat;
de6d9b64 204
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205typedef struct AVIndexEntry {
206 int64_t pos;
207 int64_t timestamp;
208#define AVINDEX_KEYFRAME 0x0001
b754978a 209/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
fb2758c8 210 int flags;
3e9245a9 211 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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212} AVIndexEntry;
213
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214enum AVDiscard{
215//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
216 AVDISCARD_NONE =-16, ///< discard nothing
217 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
218 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
219 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
220 AVDISCARD_ALL = 48, ///< discard all
221};
222
de6d9b64 223typedef struct AVStream {
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224 int index; /* stream index in AVFormatContext */
225 int id; /* format specific stream id */
de6d9b64 226 AVCodecContext codec; /* codec context */
c0df9d75 227 AVRational r_frame_rate; /* real frame rate of the stream */
de6d9b64 228 void *priv_data;
b9a281db 229 /* internal data used in av_find_stream_info() */
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230 int64_t codec_info_duration;
231 int codec_info_nb_frames;
da24c5e3 232 /* encoding: PTS generation when outputing stream */
1e51d801 233 AVFrac pts;
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234 AVRational time_base;
235 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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236 /* ffmpeg.c private use */
237 int stream_copy; /* if TRUE, just copy stream */
f3356e9c 238 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
b4aea108 239 //FIXME move stuff to a flags field?
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240 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
241 * MN:dunno if thats the right place, for it */
242 float quality;
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243 /* decoding: position of the first frame of the component, in
244 AV_TIME_BASE fractional seconds. */
245 int64_t start_time;
246 /* decoding: duration of the stream, in AV_TIME_BASE fractional
247 seconds. */
248 int64_t duration;
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249
250 /* av_read_frame() support */
251 int need_parsing;
252 struct AVCodecParserContext *parser;
6ec87caa 253
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254 int64_t cur_dts;
255 int last_IP_duration;
77405fc8 256 int64_t last_IP_pts;
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257 /* av_seek_frame() support */
258 AVIndexEntry *index_entries; /* only used if the format does not
259 support seeking natively */
260 int nb_index_entries;
261 int index_entries_allocated_size;
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262} AVStream;
263
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264#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
265 (streams are added dynamically) */
266
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267#define MAX_STREAMS 20
268
269/* format I/O context */
270typedef struct AVFormatContext {
7fea94ce 271 const AVClass *av_class; /* set by av_alloc_format_context */
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272 /* can only be iformat or oformat, not both at the same time */
273 struct AVInputFormat *iformat;
274 struct AVOutputFormat *oformat;
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275 void *priv_data;
276 ByteIOContext pb;
277 int nb_streams;
278 AVStream *streams[MAX_STREAMS];
279 char filename[1024]; /* input or output filename */
280 /* stream info */
4568325a 281 int64_t timestamp;
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282 char title[512];
283 char author[512];
284 char copyright[512];
285 char comment[512];
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286 char album[512];
287 int year; /* ID3 year, 0 if none */
288 int track; /* track number, 0 if none */
289 char genre[32]; /* ID3 genre */
290
da24c5e3 291 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 292 /* private data for pts handling (do not modify directly) */
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293 /* This buffer is only needed when packets were already buffered but
294 not decoded, for example to get the codec parameters in mpeg
295 streams */
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296 struct AVPacketList *packet_buffer;
297
298 /* decoding: position of the first frame of the component, in
299 AV_TIME_BASE fractional seconds. NEVER set this value directly:
300 it is deduced from the AVStream values. */
301 int64_t start_time;
302 /* decoding: duration of the stream, in AV_TIME_BASE fractional
303 seconds. NEVER set this value directly: it is deduced from the
304 AVStream values. */
305 int64_t duration;
306 /* decoding: total file size. 0 if unknown */
307 int64_t file_size;
308 /* decoding: total stream bitrate in bit/s, 0 if not
309 available. Never set it directly if the file_size and the
310 duration are known as ffmpeg can compute it automatically. */
311 int bit_rate;
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312
313 /* av_read_frame() support */
314 AVStream *cur_st;
315 const uint8_t *cur_ptr;
316 int cur_len;
317 AVPacket cur_pkt;
318
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319 /* av_seek_frame() support */
320 int64_t data_offset; /* offset of the first packet */
321 int index_built;
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322
323 int mux_rate;
324 int packet_size;
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325 int preload;
326 int max_delay;
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327} AVFormatContext;
328
329typedef struct AVPacketList {
330 AVPacket pkt;
331 struct AVPacketList *next;
332} AVPacketList;
333
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334extern AVInputFormat *first_iformat;
335extern AVOutputFormat *first_oformat;
de6d9b64 336
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337/* still image support */
338struct AVInputImageContext;
339typedef struct AVInputImageContext AVInputImageContext;
340
341typedef struct AVImageInfo {
342 enum PixelFormat pix_fmt; /* requested pixel format */
343 int width; /* requested width */
344 int height; /* requested height */
7e2e1abf 345 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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346 AVPicture pict; /* returned allocated image */
347} AVImageInfo;
348
3b1a27e0 349/* AVImageFormat.flags field constants */
7e2e1abf 350#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 351
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352typedef struct AVImageFormat {
353 const char *name;
354 const char *extensions;
355 /* tell if a given file has a chance of being parsing by this format */
356 int (*img_probe)(AVProbeData *);
357 /* read a whole image. 'alloc_cb' is called when the image size is
358 known so that the caller can allocate the image. If 'allo_cb'
359 returns non zero, then the parsing is aborted. Return '0' if
360 OK. */
361 int (*img_read)(ByteIOContext *,
362 int (*alloc_cb)(void *, AVImageInfo *info), void *);
363 /* write the image */
364 int supported_pixel_formats; /* mask of supported formats for output */
365 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 366 int flags;
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367 struct AVImageFormat *next;
368} AVImageFormat;
369
370void av_register_image_format(AVImageFormat *img_fmt);
371AVImageFormat *av_probe_image_format(AVProbeData *pd);
372AVImageFormat *guess_image_format(const char *filename);
5b6d5596 373enum CodecID av_guess_image2_codec(const char *filename);
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374int av_read_image(ByteIOContext *pb, const char *filename,
375 AVImageFormat *fmt,
376 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
377int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
378
379extern AVImageFormat *first_image_format;
380
381extern AVImageFormat pnm_image_format;
382extern AVImageFormat pbm_image_format;
383extern AVImageFormat pgm_image_format;
384extern AVImageFormat ppm_image_format;
8975ba81 385extern AVImageFormat pam_image_format;
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386extern AVImageFormat pgmyuv_image_format;
387extern AVImageFormat yuv_image_format;
3a13f6bd 388#ifdef CONFIG_ZLIB
0e04e4e9 389extern AVImageFormat png_image_format;
3a13f6bd 390#endif
0250738f 391extern AVImageFormat jpeg_image_format;
cdc90af0 392extern AVImageFormat gif_image_format;
6a91ec51 393extern AVImageFormat sgi_image_format;
290c5fa6 394
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395/* XXX: use automatic init with either ELF sections or C file parser */
396/* modules */
de6d9b64 397
b9a281db 398/* mpeg.c */
ee404803 399extern AVInputFormat mpegps_demux;
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400int mpegps_init(void);
401
402/* mpegts.c */
403extern AVInputFormat mpegts_demux;
404int mpegts_init(void);
de6d9b64 405
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406/* rm.c */
407int rm_init(void);
408
409/* crc.c */
410int crc_init(void);
411
412/* img.c */
413int img_init(void);
414
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415/* img2.c */
416int img2_init(void);
417
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418/* asf.c */
419int asf_init(void);
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420
421/* avienc.c */
b9a281db 422int avienc_init(void);
de6d9b64 423
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424/* avidec.c */
425int avidec_init(void);
6cea494e 426
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427/* swf.c */
428int swf_init(void);
429
430/* mov.c */
431int mov_init(void);
de6d9b64 432
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433/* movenc.c */
434int movenc_init(void);
435
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436/* flvenc.c */
437int flvenc_init(void);
438
439/* flvdec.c */
440int flvdec_init(void);
441
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442/* jpeg.c */
443int jpeg_init(void);
de6d9b64 444
6cea494e 445/* gif.c */
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446int gif_init(void);
447
6cea494e 448/* au.c */
b9a281db 449int au_init(void);
6cea494e 450
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451/* amr.c */
452int amr_init(void);
453
de6d9b64 454/* wav.c */
c3775e54 455int ff_wav_init(void);
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456
457/* raw.c */
fb2758c8 458int pcm_read_seek(AVFormatContext *s,
7b3c1382 459 int stream_index, int64_t timestamp, int flags);
b9a281db 460int raw_init(void);
de6d9b64 461
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462/* mp3.c */
463int mp3_init(void);
464
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465/* yuv4mpeg.c */
466int yuv4mpeg_init(void);
467
9146ca37 468/* ogg2.c */
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469int ogg_init(void);
470
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471/* ogg.c */
472int libogg_init(void);
473
f20dca40 474/* dv.c */
c3775e54 475int ff_dv_init(void);
f20dca40 476
de6d9b64 477/* ffm.c */
b9a281db 478int ffm_init(void);
de6d9b64 479
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480/* rtsp.c */
481extern AVInputFormat redir_demux;
482int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
483
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484/* 4xm.c */
485int fourxm_init(void);
486
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487/* psxstr.c */
488int str_init(void);
489
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490/* idroq.c */
491int roq_init(void);
492
493/* ipmovie.c */
494int ipmovie_init(void);
495
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496/* nut.c */
497int nut_init(void);
498
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499/* wc3movie.c */
500int wc3_init(void);
501
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502/* westwood.c */
503int westwood_init(void);
504
505/* segafilm.c */
506int film_init(void);
507
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508/* idcin.c */
509int idcin_init(void);
510
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511/* flic.c */
512int flic_init(void);
513
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514/* sierravmd.c */
515int vmd_init(void);
516
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517/* matroska.c */
518int matroska_init(void);
519
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520/* sol.c */
521int sol_init(void);
522
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523/* electronicarts.c */
524int ea_init(void);
525
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526/* nsvdec.c */
527int nsvdec_init(void);
528
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529#include "rtp.h"
530
531#include "rtsp.h"
532
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533/* yuv4mpeg.c */
534extern AVOutputFormat yuv4mpegpipe_oformat;
535
b9a281db 536/* utils.c */
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537void av_register_input_format(AVInputFormat *format);
538void av_register_output_format(AVOutputFormat *format);
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539AVOutputFormat *guess_stream_format(const char *short_name,
540 const char *filename, const char *mime_type);
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541AVOutputFormat *guess_format(const char *short_name,
542 const char *filename, const char *mime_type);
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543enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
544 const char *filename, const char *mime_type, enum CodecType type);
de6d9b64 545
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546void av_hex_dump(FILE *f, uint8_t *buf, int size);
547void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 548
94988531 549void av_register_all(void);
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550
551typedef struct FifoBuffer {
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552 uint8_t *buffer;
553 uint8_t *rptr, *wptr, *end;
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554} FifoBuffer;
555
556int fifo_init(FifoBuffer *f, int size);
557void fifo_free(FifoBuffer *f);
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558int fifo_size(FifoBuffer *f, uint8_t *rptr);
559int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
560void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
7000a175 561int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
568e18b1 562void fifo_realloc(FifoBuffer *f, unsigned int size);
de6d9b64 563
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564/* media file input */
565AVInputFormat *av_find_input_format(const char *short_name);
94988531 566AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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567int av_open_input_stream(AVFormatContext **ic_ptr,
568 ByteIOContext *pb, const char *filename,
569 AVInputFormat *fmt, AVFormatParameters *ap);
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570int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
571 AVInputFormat *fmt,
572 int buf_size,
573 AVFormatParameters *ap);
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574/* no av_open for output, so applications will need this: */
575AVFormatContext *av_alloc_format_context(void);
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576
577#define AVERROR_UNKNOWN (-1) /* unknown error */
578#define AVERROR_IO (-2) /* i/o error */
579#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
580#define AVERROR_INVALIDDATA (-4) /* invalid data found */
581#define AVERROR_NOMEM (-5) /* not enough memory */
582#define AVERROR_NOFMT (-6) /* unknown format */
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583#define AVERROR_NOTSUPP (-7) /* operation not supported */
584
b9a281db 585int av_find_stream_info(AVFormatContext *ic);
de6d9b64 586int av_read_packet(AVFormatContext *s, AVPacket *pkt);
fb2758c8 587int av_read_frame(AVFormatContext *s, AVPacket *pkt);
3ba1438d 588int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
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589int av_read_play(AVFormatContext *s);
590int av_read_pause(AVFormatContext *s);
de6d9b64 591void av_close_input_file(AVFormatContext *s);
b9a281db 592AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 593void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 594 int pts_num, int pts_den);
de6d9b64 595
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596#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
597#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
27a5fe5f 598#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
3ba1438d 599
b754978a 600int av_find_default_stream_index(AVFormatContext *s);
dc56fc38 601int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
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602int av_add_index_entry(AVStream *st,
603 int64_t pos, int64_t timestamp, int distance, int flags);
3ba1438d 604int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
b754978a 605
b9a281db 606/* media file output */
290c5fa6 607int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 608int av_write_header(AVFormatContext *s);
e928649b 609int av_write_frame(AVFormatContext *s, AVPacket *pkt);
3c895fc0 610int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
e928649b 611
b9a281db 612int av_write_trailer(AVFormatContext *s);
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613
614void dump_format(AVFormatContext *ic,
615 int index,
616 const char *url,
617 int is_output);
618int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 619int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 620int64_t parse_date(const char *datestr, int duration);
de6d9b64 621
0c1a9eda 622int64_t av_gettime(void);
94988531 623
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624/* ffm specific for ffserver */
625#define FFM_PACKET_SIZE 4096
626offset_t ffm_read_write_index(int fd);
627void ffm_write_write_index(int fd, offset_t pos);
628void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
629
630int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
631
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632int get_frame_filename(char *buf, int buf_size,
633 const char *path, int number);
b9a281db 634int filename_number_test(const char *filename);
96baaa6a 635
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636/* grab specific */
637int video_grab_init(void);
638int audio_init(void);
96baaa6a 639
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640/* DV1394 */
641int dv1394_init(void);
f02be79d 642int dc1394_init(void);
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643
644#ifdef HAVE_AV_CONFIG_H
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645
646#include "os_support.h"
647
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648int strstart(const char *str, const char *val, const char **ptr);
649int stristart(const char *str, const char *val, const char **ptr);
650void pstrcpy(char *buf, int buf_size, const char *str);
651char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 652
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653void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
654
e4e70d2e 655#ifdef __GNUC__
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656#define dynarray_add(tab, nb_ptr, elem)\
657do {\
658 typeof(tab) _tab = (tab);\
659 typeof(elem) _elem = (elem);\
660 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
661 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
662} while(0)
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663#else
664#define dynarray_add(tab, nb_ptr, elem)\
665do {\
666 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
667} while(0)
668#endif
39f472c3 669
f71869a4 670time_t mktimegm(struct tm *tm);
0c9fc6e1 671struct tm *brktimegm(time_t secs, struct tm *tm);
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672const char *small_strptime(const char *p, const char *fmt,
673 struct tm *dt);
674
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675struct in_addr;
676int resolve_host(struct in_addr *sin_addr, const char *hostname);
677
678void url_split(char *proto, int proto_size,
6ba5cbc6 679 char *authorization, int authorization_size,
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680 char *hostname, int hostname_size,
681 int *port_ptr,
682 char *path, int path_size,
683 const char *url);
684
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685int match_ext(const char *filename, const char *extensions);
686
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687#endif /* HAVE_AV_CONFIG_H */
688
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689#ifdef __cplusplus
690}
691#endif
692
fb025625 693#endif /* AVFORMAT_H */
f3356e9c 694