DVD subtitle parsing - show mpeg component IDs by default
[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
2692067a 8#define LIBAVFORMAT_BUILD 4625
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 time_base units
32 int64_t dts; ///< decompression time stamp in time_base units
0c1a9eda 33 uint8_t *data;
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34 int size;
35 int stream_index;
36 int flags;
2692067a 37 int duration; ///< presentation duration in time_base units (0 if not available)
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38 void (*destruct)(struct AVPacket *);
39 void *priv;
2692067a 40 int64_t pos; ///< byte position in stream, -1 if unknown
de6d9b64 41} AVPacket;
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42#define PKT_FLAG_KEY 0x0001
43
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44void av_destruct_packet_nofree(AVPacket *pkt);
45
da24c5e3 46/* initialize optional fields of a packet */
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47static inline void av_init_packet(AVPacket *pkt)
48{
49 pkt->pts = AV_NOPTS_VALUE;
fb2758c8 50 pkt->dts = AV_NOPTS_VALUE;
2692067a 51 pkt->pos = -1;
fb2758c8 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);
2692067a 59int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
fb2758c8 60int av_dup_packet(AVPacket *pkt);
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61
62/**
63 * Free a packet
64 *
65 * @param pkt packet to free
66 */
67static inline void av_free_packet(AVPacket *pkt)
68{
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69 if (pkt && pkt->destruct) {
70 pkt->destruct(pkt);
71 }
6fa5a56c 72}
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73
74/*************************************************/
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75/* fractional numbers for exact pts handling */
76
77/* the exact value of the fractional number is: 'val + num / den'. num
78 is assumed to be such as 0 <= num < den */
79typedef struct AVFrac {
0c1a9eda 80 int64_t val, num, den;
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81} AVFrac;
82
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83void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
84void av_frac_add(AVFrac *f, int64_t incr);
85void av_frac_set(AVFrac *f, int64_t val);
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86
87/*************************************************/
b9a281db 88/* input/output formats */
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89
90struct AVFormatContext;
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91
92/* this structure contains the data a format has to probe a file */
93typedef struct AVProbeData {
5c91a675 94 const char *filename;
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95 unsigned char *buf;
96 int buf_size;
97} AVProbeData;
98
99#define AVPROBE_SCORE_MAX 100
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100
101typedef struct AVFormatParameters {
c0df9d75 102 AVRational time_base;
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103 int sample_rate;
104 int channels;
105 int width;
106 int height;
4606ac8d 107 enum PixelFormat pix_fmt;
290c5fa6 108 struct AVImageFormat *image_format;
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109 int channel; /* used to select dv channel */
110 const char *device; /* video4linux, audio or DV device */
e3ee3283 111 const char *standard; /* tv standard, NTSC, PAL, SECAM */
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112 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
113 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
114 stream packet (only meaningful if
115 mpeg2ts_raw is TRUE */
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116 int initial_pause:1; /* do not begin to play the stream
117 immediately (RTSP only) */
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118 enum CodecID video_codec_id;
119 enum CodecID audio_codec_id;
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120} AVFormatParameters;
121
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122#define AVFMT_NOFILE 0x0001 /* no file should be opened */
123#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 124#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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125#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
126 raw picture data */
c64d476c 127#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
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128
129typedef struct AVOutputFormat {
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130 const char *name;
131 const char *long_name;
132 const char *mime_type;
133 const char *extensions; /* comma separated extensions */
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134 /* size of private data so that it can be allocated in the wrapper */
135 int priv_data_size;
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136 /* output support */
137 enum CodecID audio_codec; /* default audio codec */
138 enum CodecID video_codec; /* default video codec */
139 int (*write_header)(struct AVFormatContext *);
e928649b 140 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 141 int (*write_trailer)(struct AVFormatContext *);
c64d476c 142 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 143 int flags;
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144 /* currently only used to set pixel format if not YUV420P */
145 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
fe2d6fe2 146 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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147 /* private fields */
148 struct AVOutputFormat *next;
149} AVOutputFormat;
de6d9b64 150
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151typedef struct AVInputFormat {
152 const char *name;
153 const char *long_name;
154 /* size of private data so that it can be allocated in the wrapper */
155 int priv_data_size;
156 /* tell if a given file has a chance of being parsing by this format */
157 int (*read_probe)(AVProbeData *);
158 /* read the format header and initialize the AVFormatContext
de6d9b64 159 structure. Return 0 if OK. 'ap' if non NULL contains
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160 additionnal paramters. Only used in raw format right
161 now. 'av_new_stream' should be called to create new streams. */
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162 int (*read_header)(struct AVFormatContext *,
163 AVFormatParameters *ap);
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164 /* read one packet and put it in 'pkt'. pts and flags are also
165 set. 'av_new_stream' can be called only if the flag
da24c5e3 166 AVFMTCTX_NOHEADER is used. */
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167 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
168 /* close the stream. The AVFormatContext and AVStreams are not
169 freed by this function */
170 int (*read_close)(struct AVFormatContext *);
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171 /**
172 * seek to a given timestamp relative to the frames in
173 * stream component stream_index
174 * @param stream_index must not be -1
175 * @param flags selects which direction should be preferred if no exact
176 * match is available
177 */
fb2758c8 178 int (*read_seek)(struct AVFormatContext *,
3ba1438d 179 int stream_index, int64_t timestamp, int flags);
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180 /**
181 * gets the next timestamp in AV_TIME_BASE units.
182 */
183 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
184 int64_t *pos, int64_t pos_limit);
da24c5e3 185 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 186 int flags;
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187 /* if extensions are defined, then no probe is done. You should
188 usually not use extension format guessing because it is not
189 reliable enough */
190 const char *extensions;
191 /* general purpose read only value that the format can use */
192 int value;
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193
194 /* start/resume playing - only meaningful if using a network based format
195 (RTSP) */
196 int (*read_play)(struct AVFormatContext *);
197
198 /* pause playing - only meaningful if using a network based format
199 (RTSP) */
200 int (*read_pause)(struct AVFormatContext *);
201
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202 /* private fields */
203 struct AVInputFormat *next;
204} AVInputFormat;
de6d9b64 205
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206typedef struct AVIndexEntry {
207 int64_t pos;
208 int64_t timestamp;
209#define AVINDEX_KEYFRAME 0x0001
b754978a 210/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
fb2758c8 211 int flags;
3e9245a9 212 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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213} AVIndexEntry;
214
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215enum AVDiscard{
216//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
217 AVDISCARD_NONE =-16, ///< discard nothing
218 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
219 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
220 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
221 AVDISCARD_ALL = 48, ///< discard all
222};
223
de6d9b64 224typedef struct AVStream {
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225 int index; /* stream index in AVFormatContext */
226 int id; /* format specific stream id */
de6d9b64 227 AVCodecContext codec; /* codec context */
c0df9d75 228 AVRational r_frame_rate; /* real frame rate of the stream */
de6d9b64 229 void *priv_data;
b9a281db 230 /* internal data used in av_find_stream_info() */
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231 int64_t codec_info_duration;
232 int codec_info_nb_frames;
da24c5e3 233 /* encoding: PTS generation when outputing stream */
1e51d801 234 AVFrac pts;
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235 AVRational time_base;
236 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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237 /* ffmpeg.c private use */
238 int stream_copy; /* if TRUE, just copy stream */
f3356e9c 239 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
b4aea108 240 //FIXME move stuff to a flags field?
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241 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
242 * MN:dunno if thats the right place, for it */
243 float quality;
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244 /* decoding: position of the first frame of the component, in
245 AV_TIME_BASE fractional seconds. */
246 int64_t start_time;
247 /* decoding: duration of the stream, in AV_TIME_BASE fractional
248 seconds. */
249 int64_t duration;
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250
251 /* av_read_frame() support */
252 int need_parsing;
253 struct AVCodecParserContext *parser;
6ec87caa 254
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255 int64_t cur_dts;
256 int last_IP_duration;
77405fc8 257 int64_t last_IP_pts;
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258 /* av_seek_frame() support */
259 AVIndexEntry *index_entries; /* only used if the format does not
260 support seeking natively */
261 int nb_index_entries;
262 int index_entries_allocated_size;
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263} AVStream;
264
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265#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
266 (streams are added dynamically) */
267
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268#define MAX_STREAMS 20
269
270/* format I/O context */
271typedef struct AVFormatContext {
7fea94ce 272 const AVClass *av_class; /* set by av_alloc_format_context */
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273 /* can only be iformat or oformat, not both at the same time */
274 struct AVInputFormat *iformat;
275 struct AVOutputFormat *oformat;
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276 void *priv_data;
277 ByteIOContext pb;
278 int nb_streams;
279 AVStream *streams[MAX_STREAMS];
280 char filename[1024]; /* input or output filename */
281 /* stream info */
4568325a 282 int64_t timestamp;
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283 char title[512];
284 char author[512];
285 char copyright[512];
286 char comment[512];
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287 char album[512];
288 int year; /* ID3 year, 0 if none */
289 int track; /* track number, 0 if none */
290 char genre[32]; /* ID3 genre */
291
da24c5e3 292 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 293 /* private data for pts handling (do not modify directly) */
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294 /* This buffer is only needed when packets were already buffered but
295 not decoded, for example to get the codec parameters in mpeg
296 streams */
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297 struct AVPacketList *packet_buffer;
298
299 /* decoding: position of the first frame of the component, in
300 AV_TIME_BASE fractional seconds. NEVER set this value directly:
301 it is deduced from the AVStream values. */
302 int64_t start_time;
303 /* decoding: duration of the stream, in AV_TIME_BASE fractional
304 seconds. NEVER set this value directly: it is deduced from the
305 AVStream values. */
306 int64_t duration;
307 /* decoding: total file size. 0 if unknown */
308 int64_t file_size;
309 /* decoding: total stream bitrate in bit/s, 0 if not
310 available. Never set it directly if the file_size and the
311 duration are known as ffmpeg can compute it automatically. */
312 int bit_rate;
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313
314 /* av_read_frame() support */
315 AVStream *cur_st;
316 const uint8_t *cur_ptr;
317 int cur_len;
318 AVPacket cur_pkt;
319
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320 /* av_seek_frame() support */
321 int64_t data_offset; /* offset of the first packet */
322 int index_built;
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323
324 int mux_rate;
325 int packet_size;
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326 int preload;
327 int max_delay;
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328} AVFormatContext;
329
330typedef struct AVPacketList {
331 AVPacket pkt;
332 struct AVPacketList *next;
333} AVPacketList;
334
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335extern AVInputFormat *first_iformat;
336extern AVOutputFormat *first_oformat;
de6d9b64 337
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338/* still image support */
339struct AVInputImageContext;
340typedef struct AVInputImageContext AVInputImageContext;
341
342typedef struct AVImageInfo {
343 enum PixelFormat pix_fmt; /* requested pixel format */
344 int width; /* requested width */
345 int height; /* requested height */
7e2e1abf 346 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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347 AVPicture pict; /* returned allocated image */
348} AVImageInfo;
349
3b1a27e0 350/* AVImageFormat.flags field constants */
7e2e1abf 351#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 352
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353typedef struct AVImageFormat {
354 const char *name;
355 const char *extensions;
356 /* tell if a given file has a chance of being parsing by this format */
357 int (*img_probe)(AVProbeData *);
358 /* read a whole image. 'alloc_cb' is called when the image size is
359 known so that the caller can allocate the image. If 'allo_cb'
360 returns non zero, then the parsing is aborted. Return '0' if
361 OK. */
362 int (*img_read)(ByteIOContext *,
363 int (*alloc_cb)(void *, AVImageInfo *info), void *);
364 /* write the image */
365 int supported_pixel_formats; /* mask of supported formats for output */
366 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 367 int flags;
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368 struct AVImageFormat *next;
369} AVImageFormat;
370
371void av_register_image_format(AVImageFormat *img_fmt);
372AVImageFormat *av_probe_image_format(AVProbeData *pd);
373AVImageFormat *guess_image_format(const char *filename);
5b6d5596 374enum CodecID av_guess_image2_codec(const char *filename);
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375int av_read_image(ByteIOContext *pb, const char *filename,
376 AVImageFormat *fmt,
377 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
378int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
379
380extern AVImageFormat *first_image_format;
381
382extern AVImageFormat pnm_image_format;
383extern AVImageFormat pbm_image_format;
384extern AVImageFormat pgm_image_format;
385extern AVImageFormat ppm_image_format;
8975ba81 386extern AVImageFormat pam_image_format;
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387extern AVImageFormat pgmyuv_image_format;
388extern AVImageFormat yuv_image_format;
3a13f6bd 389#ifdef CONFIG_ZLIB
0e04e4e9 390extern AVImageFormat png_image_format;
3a13f6bd 391#endif
0250738f 392extern AVImageFormat jpeg_image_format;
cdc90af0 393extern AVImageFormat gif_image_format;
6a91ec51 394extern AVImageFormat sgi_image_format;
290c5fa6 395
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396/* XXX: use automatic init with either ELF sections or C file parser */
397/* modules */
de6d9b64 398
b9a281db 399/* mpeg.c */
ee404803 400extern AVInputFormat mpegps_demux;
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401int mpegps_init(void);
402
403/* mpegts.c */
404extern AVInputFormat mpegts_demux;
405int mpegts_init(void);
de6d9b64 406
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407/* rm.c */
408int rm_init(void);
409
410/* crc.c */
411int crc_init(void);
412
413/* img.c */
414int img_init(void);
415
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416/* img2.c */
417int img2_init(void);
418
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419/* asf.c */
420int asf_init(void);
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421
422/* avienc.c */
b9a281db 423int avienc_init(void);
de6d9b64 424
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425/* avidec.c */
426int avidec_init(void);
6cea494e 427
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428/* swf.c */
429int swf_init(void);
430
431/* mov.c */
432int mov_init(void);
de6d9b64 433
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434/* movenc.c */
435int movenc_init(void);
436
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437/* flvenc.c */
438int flvenc_init(void);
439
440/* flvdec.c */
441int flvdec_init(void);
442
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443/* jpeg.c */
444int jpeg_init(void);
de6d9b64 445
6cea494e 446/* gif.c */
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447int gif_init(void);
448
6cea494e 449/* au.c */
b9a281db 450int au_init(void);
6cea494e 451
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452/* amr.c */
453int amr_init(void);
454
de6d9b64 455/* wav.c */
c3775e54 456int ff_wav_init(void);
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457
458/* raw.c */
fb2758c8 459int pcm_read_seek(AVFormatContext *s,
7b3c1382 460 int stream_index, int64_t timestamp, int flags);
b9a281db 461int raw_init(void);
de6d9b64 462
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463/* mp3.c */
464int mp3_init(void);
465
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466/* yuv4mpeg.c */
467int yuv4mpeg_init(void);
468
9146ca37 469/* ogg2.c */
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470int ogg_init(void);
471
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472/* ogg.c */
473int libogg_init(void);
474
f20dca40 475/* dv.c */
c3775e54 476int ff_dv_init(void);
f20dca40 477
de6d9b64 478/* ffm.c */
b9a281db 479int ffm_init(void);
de6d9b64 480
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481/* rtsp.c */
482extern AVInputFormat redir_demux;
483int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
484
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485/* 4xm.c */
486int fourxm_init(void);
487
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488/* psxstr.c */
489int str_init(void);
490
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491/* idroq.c */
492int roq_init(void);
493
494/* ipmovie.c */
495int ipmovie_init(void);
496
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497/* nut.c */
498int nut_init(void);
499
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500/* wc3movie.c */
501int wc3_init(void);
502
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503/* westwood.c */
504int westwood_init(void);
505
506/* segafilm.c */
507int film_init(void);
508
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509/* idcin.c */
510int idcin_init(void);
511
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512/* flic.c */
513int flic_init(void);
514
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515/* sierravmd.c */
516int vmd_init(void);
517
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518/* matroska.c */
519int matroska_init(void);
520
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521/* sol.c */
522int sol_init(void);
523
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524/* electronicarts.c */
525int ea_init(void);
526
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527/* nsvdec.c */
528int nsvdec_init(void);
529
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530#include "rtp.h"
531
532#include "rtsp.h"
533
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534/* yuv4mpeg.c */
535extern AVOutputFormat yuv4mpegpipe_oformat;
536
b9a281db 537/* utils.c */
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538void av_register_input_format(AVInputFormat *format);
539void av_register_output_format(AVOutputFormat *format);
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540AVOutputFormat *guess_stream_format(const char *short_name,
541 const char *filename, const char *mime_type);
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542AVOutputFormat *guess_format(const char *short_name,
543 const char *filename, const char *mime_type);
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544enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
545 const char *filename, const char *mime_type, enum CodecType type);
de6d9b64 546
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547void av_hex_dump(FILE *f, uint8_t *buf, int size);
548void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 549
94988531 550void av_register_all(void);
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551
552typedef struct FifoBuffer {
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553 uint8_t *buffer;
554 uint8_t *rptr, *wptr, *end;
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555} FifoBuffer;
556
557int fifo_init(FifoBuffer *f, int size);
558void fifo_free(FifoBuffer *f);
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559int fifo_size(FifoBuffer *f, uint8_t *rptr);
560int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
561void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
7000a175 562int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
568e18b1 563void fifo_realloc(FifoBuffer *f, unsigned int size);
de6d9b64 564
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565/* media file input */
566AVInputFormat *av_find_input_format(const char *short_name);
94988531 567AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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568int av_open_input_stream(AVFormatContext **ic_ptr,
569 ByteIOContext *pb, const char *filename,
570 AVInputFormat *fmt, AVFormatParameters *ap);
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571int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
572 AVInputFormat *fmt,
573 int buf_size,
574 AVFormatParameters *ap);
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575/* no av_open for output, so applications will need this: */
576AVFormatContext *av_alloc_format_context(void);
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577
578#define AVERROR_UNKNOWN (-1) /* unknown error */
579#define AVERROR_IO (-2) /* i/o error */
580#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
581#define AVERROR_INVALIDDATA (-4) /* invalid data found */
582#define AVERROR_NOMEM (-5) /* not enough memory */
583#define AVERROR_NOFMT (-6) /* unknown format */
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584#define AVERROR_NOTSUPP (-7) /* operation not supported */
585
b9a281db 586int av_find_stream_info(AVFormatContext *ic);
de6d9b64 587int av_read_packet(AVFormatContext *s, AVPacket *pkt);
fb2758c8 588int av_read_frame(AVFormatContext *s, AVPacket *pkt);
3ba1438d 589int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
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590int av_read_play(AVFormatContext *s);
591int av_read_pause(AVFormatContext *s);
de6d9b64 592void av_close_input_file(AVFormatContext *s);
b9a281db 593AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 594void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 595 int pts_num, int pts_den);
de6d9b64 596
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597#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
598#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
27a5fe5f 599#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
3ba1438d 600
b754978a 601int av_find_default_stream_index(AVFormatContext *s);
dc56fc38 602int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
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603int av_add_index_entry(AVStream *st,
604 int64_t pos, int64_t timestamp, int distance, int flags);
3ba1438d 605int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
b754978a 606
b9a281db 607/* media file output */
290c5fa6 608int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 609int av_write_header(AVFormatContext *s);
e928649b 610int av_write_frame(AVFormatContext *s, AVPacket *pkt);
3c895fc0 611int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
e928649b 612
b9a281db 613int av_write_trailer(AVFormatContext *s);
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614
615void dump_format(AVFormatContext *ic,
616 int index,
617 const char *url,
618 int is_output);
619int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 620int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 621int64_t parse_date(const char *datestr, int duration);
de6d9b64 622
0c1a9eda 623int64_t av_gettime(void);
94988531 624
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625/* ffm specific for ffserver */
626#define FFM_PACKET_SIZE 4096
627offset_t ffm_read_write_index(int fd);
628void ffm_write_write_index(int fd, offset_t pos);
629void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
630
631int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
632
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633int get_frame_filename(char *buf, int buf_size,
634 const char *path, int number);
b9a281db 635int filename_number_test(const char *filename);
96baaa6a 636
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637/* grab specific */
638int video_grab_init(void);
639int audio_init(void);
96baaa6a 640
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641/* DV1394 */
642int dv1394_init(void);
f02be79d 643int dc1394_init(void);
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644
645#ifdef HAVE_AV_CONFIG_H
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646
647#include "os_support.h"
648
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649int strstart(const char *str, const char *val, const char **ptr);
650int stristart(const char *str, const char *val, const char **ptr);
651void pstrcpy(char *buf, int buf_size, const char *str);
652char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 653
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654void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
655
e4e70d2e 656#ifdef __GNUC__
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657#define dynarray_add(tab, nb_ptr, elem)\
658do {\
659 typeof(tab) _tab = (tab);\
660 typeof(elem) _elem = (elem);\
661 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
662 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
663} while(0)
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664#else
665#define dynarray_add(tab, nb_ptr, elem)\
666do {\
667 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
668} while(0)
669#endif
39f472c3 670
f71869a4 671time_t mktimegm(struct tm *tm);
0c9fc6e1 672struct tm *brktimegm(time_t secs, struct tm *tm);
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673const char *small_strptime(const char *p, const char *fmt,
674 struct tm *dt);
675
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676struct in_addr;
677int resolve_host(struct in_addr *sin_addr, const char *hostname);
678
679void url_split(char *proto, int proto_size,
6ba5cbc6 680 char *authorization, int authorization_size,
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681 char *hostname, int hostname_size,
682 int *port_ptr,
683 char *path, int path_size,
684 const char *url);
685
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686int match_ext(const char *filename, const char *extensions);
687
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688#endif /* HAVE_AV_CONFIG_H */
689
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690#ifdef __cplusplus
691}
692#endif
693
fb025625 694#endif /* AVFORMAT_H */
f3356e9c 695