10l
[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
6ec87caa 8#define LIBAVFORMAT_BUILD 4611
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
da24c5e3 45/* initialize optional fields of a packet */
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46static inline void av_init_packet(AVPacket *pkt)
47{
48 pkt->pts = AV_NOPTS_VALUE;
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49 pkt->dts = AV_NOPTS_VALUE;
50 pkt->duration = 0;
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51 pkt->flags = 0;
52 pkt->stream_index = 0;
53}
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54
55int av_new_packet(AVPacket *pkt, int size);
fb2758c8 56int av_dup_packet(AVPacket *pkt);
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57
58/**
59 * Free a packet
60 *
61 * @param pkt packet to free
62 */
63static inline void av_free_packet(AVPacket *pkt)
64{
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65 if (pkt && pkt->destruct) {
66 pkt->destruct(pkt);
67 }
6fa5a56c 68}
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69
70/*************************************************/
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71/* fractional numbers for exact pts handling */
72
73/* the exact value of the fractional number is: 'val + num / den'. num
74 is assumed to be such as 0 <= num < den */
75typedef struct AVFrac {
0c1a9eda 76 int64_t val, num, den;
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77} AVFrac;
78
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79void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
80void av_frac_add(AVFrac *f, int64_t incr);
81void av_frac_set(AVFrac *f, int64_t val);
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82
83/*************************************************/
b9a281db 84/* input/output formats */
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85
86struct AVFormatContext;
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87
88/* this structure contains the data a format has to probe a file */
89typedef struct AVProbeData {
5c91a675 90 const char *filename;
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91 unsigned char *buf;
92 int buf_size;
93} AVProbeData;
94
95#define AVPROBE_SCORE_MAX 100
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96
97typedef struct AVFormatParameters {
98 int frame_rate;
14bea432 99 int frame_rate_base;
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100 int sample_rate;
101 int channels;
102 int width;
103 int height;
4606ac8d 104 enum PixelFormat pix_fmt;
290c5fa6 105 struct AVImageFormat *image_format;
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106 int channel; /* used to select dv channel */
107 const char *device; /* video4linux, audio or DV device */
e3ee3283 108 const char *standard; /* tv standard, NTSC, PAL, SECAM */
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109 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
110 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
111 stream packet (only meaningful if
112 mpeg2ts_raw is TRUE */
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113 int initial_pause:1; /* do not begin to play the stream
114 immediately (RTSP only) */
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115} AVFormatParameters;
116
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117#define AVFMT_NOFILE 0x0001 /* no file should be opened */
118#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 119#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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120#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
121 raw picture data */
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122
123typedef struct AVOutputFormat {
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124 const char *name;
125 const char *long_name;
126 const char *mime_type;
127 const char *extensions; /* comma separated extensions */
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128 /* size of private data so that it can be allocated in the wrapper */
129 int priv_data_size;
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130 /* output support */
131 enum CodecID audio_codec; /* default audio codec */
132 enum CodecID video_codec; /* default video codec */
133 int (*write_header)(struct AVFormatContext *);
134 int (*write_packet)(struct AVFormatContext *,
135 int stream_index,
49057904 136 const uint8_t *buf, int size, int64_t pts);
de6d9b64 137 int (*write_trailer)(struct AVFormatContext *);
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138 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
139 int flags;
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140 /* currently only used to set pixel format if not YUV420P */
141 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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142 /* private fields */
143 struct AVOutputFormat *next;
144} AVOutputFormat;
de6d9b64 145
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146typedef struct AVInputFormat {
147 const char *name;
148 const char *long_name;
149 /* size of private data so that it can be allocated in the wrapper */
150 int priv_data_size;
151 /* tell if a given file has a chance of being parsing by this format */
152 int (*read_probe)(AVProbeData *);
153 /* read the format header and initialize the AVFormatContext
de6d9b64 154 structure. Return 0 if OK. 'ap' if non NULL contains
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155 additionnal paramters. Only used in raw format right
156 now. 'av_new_stream' should be called to create new streams. */
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157 int (*read_header)(struct AVFormatContext *,
158 AVFormatParameters *ap);
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159 /* read one packet and put it in 'pkt'. pts and flags are also
160 set. 'av_new_stream' can be called only if the flag
da24c5e3 161 AVFMTCTX_NOHEADER is used. */
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162 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
163 /* close the stream. The AVFormatContext and AVStreams are not
164 freed by this function */
165 int (*read_close)(struct AVFormatContext *);
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166 /* seek at or before a given timestamp (given in AV_TIME_BASE
167 units) relative to the frames in stream component stream_index */
168 int (*read_seek)(struct AVFormatContext *,
169 int stream_index, int64_t timestamp);
da24c5e3 170 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 171 int flags;
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172 /* if extensions are defined, then no probe is done. You should
173 usually not use extension format guessing because it is not
174 reliable enough */
175 const char *extensions;
176 /* general purpose read only value that the format can use */
177 int value;
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178
179 /* start/resume playing - only meaningful if using a network based format
180 (RTSP) */
181 int (*read_play)(struct AVFormatContext *);
182
183 /* pause playing - only meaningful if using a network based format
184 (RTSP) */
185 int (*read_pause)(struct AVFormatContext *);
186
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187 /* private fields */
188 struct AVInputFormat *next;
189} AVInputFormat;
de6d9b64 190
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191typedef struct AVIndexEntry {
192 int64_t pos;
193 int64_t timestamp;
194#define AVINDEX_KEYFRAME 0x0001
b754978a 195/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
fb2758c8 196 int flags;
3e9245a9 197 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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198} AVIndexEntry;
199
de6d9b64 200typedef struct AVStream {
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201 int index; /* stream index in AVFormatContext */
202 int id; /* format specific stream id */
de6d9b64 203 AVCodecContext codec; /* codec context */
76c0441b 204 int r_frame_rate; /* real frame rate of the stream */
14bea432 205 int r_frame_rate_base;/* real frame rate base of the stream */
de6d9b64 206 void *priv_data;
b9a281db 207 /* internal data used in av_find_stream_info() */
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208 int64_t codec_info_duration;
209 int codec_info_nb_frames;
da24c5e3 210 /* encoding: PTS generation when outputing stream */
1e51d801 211 AVFrac pts;
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212 /* ffmpeg.c private use */
213 int stream_copy; /* if TRUE, just copy stream */
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214 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
215 * MN:dunno if thats the right place, for it */
216 float quality;
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217 /* decoding: position of the first frame of the component, in
218 AV_TIME_BASE fractional seconds. */
219 int64_t start_time;
220 /* decoding: duration of the stream, in AV_TIME_BASE fractional
221 seconds. */
222 int64_t duration;
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223
224 /* av_read_frame() support */
225 int need_parsing;
226 struct AVCodecParserContext *parser;
6ec87caa 227
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228 int64_t cur_dts;
229 int last_IP_duration;
230 /* av_seek_frame() support */
231 AVIndexEntry *index_entries; /* only used if the format does not
232 support seeking natively */
233 int nb_index_entries;
234 int index_entries_allocated_size;
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235} AVStream;
236
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237#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
238 (streams are added dynamically) */
239
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240#define MAX_STREAMS 20
241
242/* format I/O context */
243typedef struct AVFormatContext {
43465395 244 AVClass *av_class; /* set by av_alloc_format_context */
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245 /* can only be iformat or oformat, not both at the same time */
246 struct AVInputFormat *iformat;
247 struct AVOutputFormat *oformat;
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248 void *priv_data;
249 ByteIOContext pb;
250 int nb_streams;
251 AVStream *streams[MAX_STREAMS];
252 char filename[1024]; /* input or output filename */
253 /* stream info */
254 char title[512];
255 char author[512];
256 char copyright[512];
257 char comment[512];
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258 char album[512];
259 int year; /* ID3 year, 0 if none */
260 int track; /* track number, 0 if none */
261 char genre[32]; /* ID3 genre */
262
da24c5e3 263 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
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264 /* private data for pts handling (do not modify directly) */
265 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
266 int pts_num, pts_den; /* value to convert to seconds */
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267 /* This buffer is only needed when packets were already buffered but
268 not decoded, for example to get the codec parameters in mpeg
269 streams */
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270 struct AVPacketList *packet_buffer;
271
272 /* decoding: position of the first frame of the component, in
273 AV_TIME_BASE fractional seconds. NEVER set this value directly:
274 it is deduced from the AVStream values. */
275 int64_t start_time;
276 /* decoding: duration of the stream, in AV_TIME_BASE fractional
277 seconds. NEVER set this value directly: it is deduced from the
278 AVStream values. */
279 int64_t duration;
280 /* decoding: total file size. 0 if unknown */
281 int64_t file_size;
282 /* decoding: total stream bitrate in bit/s, 0 if not
283 available. Never set it directly if the file_size and the
284 duration are known as ffmpeg can compute it automatically. */
285 int bit_rate;
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286
287 /* av_read_frame() support */
288 AVStream *cur_st;
289 const uint8_t *cur_ptr;
290 int cur_len;
291 AVPacket cur_pkt;
292
293 /* the following are used for pts/dts unit conversion */
294 int64_t last_pkt_stream_pts;
295 int64_t last_pkt_stream_dts;
296 int64_t last_pkt_pts;
297 int64_t last_pkt_dts;
298 int last_pkt_pts_frac;
299 int last_pkt_dts_frac;
300
301 /* av_seek_frame() support */
302 int64_t data_offset; /* offset of the first packet */
303 int index_built;
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304} AVFormatContext;
305
306typedef struct AVPacketList {
307 AVPacket pkt;
308 struct AVPacketList *next;
309} AVPacketList;
310
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311extern AVInputFormat *first_iformat;
312extern AVOutputFormat *first_oformat;
de6d9b64 313
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314/* still image support */
315struct AVInputImageContext;
316typedef struct AVInputImageContext AVInputImageContext;
317
318typedef struct AVImageInfo {
319 enum PixelFormat pix_fmt; /* requested pixel format */
320 int width; /* requested width */
321 int height; /* requested height */
7e2e1abf 322 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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323 AVPicture pict; /* returned allocated image */
324} AVImageInfo;
325
3b1a27e0 326/* AVImageFormat.flags field constants */
7e2e1abf 327#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 328
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329typedef struct AVImageFormat {
330 const char *name;
331 const char *extensions;
332 /* tell if a given file has a chance of being parsing by this format */
333 int (*img_probe)(AVProbeData *);
334 /* read a whole image. 'alloc_cb' is called when the image size is
335 known so that the caller can allocate the image. If 'allo_cb'
336 returns non zero, then the parsing is aborted. Return '0' if
337 OK. */
338 int (*img_read)(ByteIOContext *,
339 int (*alloc_cb)(void *, AVImageInfo *info), void *);
340 /* write the image */
341 int supported_pixel_formats; /* mask of supported formats for output */
342 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 343 int flags;
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344 struct AVImageFormat *next;
345} AVImageFormat;
346
347void av_register_image_format(AVImageFormat *img_fmt);
348AVImageFormat *av_probe_image_format(AVProbeData *pd);
349AVImageFormat *guess_image_format(const char *filename);
350int av_read_image(ByteIOContext *pb, const char *filename,
351 AVImageFormat *fmt,
352 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
353int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
354
355extern AVImageFormat *first_image_format;
356
357extern AVImageFormat pnm_image_format;
358extern AVImageFormat pbm_image_format;
359extern AVImageFormat pgm_image_format;
360extern AVImageFormat ppm_image_format;
8975ba81 361extern AVImageFormat pam_image_format;
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362extern AVImageFormat pgmyuv_image_format;
363extern AVImageFormat yuv_image_format;
3a13f6bd 364#ifdef CONFIG_ZLIB
0e04e4e9 365extern AVImageFormat png_image_format;
3a13f6bd 366#endif
0250738f 367extern AVImageFormat jpeg_image_format;
cdc90af0 368extern AVImageFormat gif_image_format;
290c5fa6 369
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370/* XXX: use automatic init with either ELF sections or C file parser */
371/* modules */
de6d9b64 372
b9a281db 373/* mpeg.c */
ee404803 374extern AVInputFormat mpegps_demux;
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375int mpegps_init(void);
376
377/* mpegts.c */
378extern AVInputFormat mpegts_demux;
379int mpegts_init(void);
de6d9b64 380
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381/* rm.c */
382int rm_init(void);
383
384/* crc.c */
385int crc_init(void);
386
387/* img.c */
388int img_init(void);
389
390/* asf.c */
391int asf_init(void);
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392
393/* avienc.c */
b9a281db 394int avienc_init(void);
de6d9b64 395
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396/* avidec.c */
397int avidec_init(void);
6cea494e 398
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399/* swf.c */
400int swf_init(void);
401
402/* mov.c */
403int mov_init(void);
de6d9b64 404
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405/* movenc.c */
406int movenc_init(void);
407
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408/* flvenc.c */
409int flvenc_init(void);
410
411/* flvdec.c */
412int flvdec_init(void);
413
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414/* jpeg.c */
415int jpeg_init(void);
de6d9b64 416
6cea494e 417/* gif.c */
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418int gif_init(void);
419
6cea494e 420/* au.c */
b9a281db 421int au_init(void);
6cea494e 422
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423/* amr.c */
424int amr_init(void);
425
de6d9b64 426/* wav.c */
b9a281db 427int wav_init(void);
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428
429/* raw.c */
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430int pcm_read_seek(AVFormatContext *s,
431 int stream_index, int64_t timestamp);
b9a281db 432int raw_init(void);
de6d9b64 433
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434/* mp3.c */
435int mp3_init(void);
436
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437/* yuv4mpeg.c */
438int yuv4mpeg_init(void);
439
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440/* ogg.c */
441int ogg_init(void);
442
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443/* dv.c */
444int dv_init(void);
445
de6d9b64 446/* ffm.c */
b9a281db 447int ffm_init(void);
de6d9b64 448
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449/* rtsp.c */
450extern AVInputFormat redir_demux;
451int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
452
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453/* 4xm.c */
454int fourxm_init(void);
455
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456/* psxstr.c */
457int str_init(void);
458
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459/* idroq.c */
460int roq_init(void);
461
462/* ipmovie.c */
463int ipmovie_init(void);
464
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465/* nut.c */
466int nut_init(void);
467
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468/* wc3movie.c */
469int wc3_init(void);
470
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471/* westwood.c */
472int westwood_init(void);
473
474/* segafilm.c */
475int film_init(void);
476
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477/* idcin.c */
478int idcin_init(void);
479
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480/* flic.c */
481int flic_init(void);
482
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483/* sierravmd.c */
484int vmd_init(void);
485
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486#include "rtp.h"
487
488#include "rtsp.h"
489
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490/* yuv4mpeg.c */
491extern AVOutputFormat yuv4mpegpipe_oformat;
492
b9a281db 493/* utils.c */
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494void av_register_input_format(AVInputFormat *format);
495void av_register_output_format(AVOutputFormat *format);
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496AVOutputFormat *guess_stream_format(const char *short_name,
497 const char *filename, const char *mime_type);
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498AVOutputFormat *guess_format(const char *short_name,
499 const char *filename, const char *mime_type);
de6d9b64 500
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501void av_hex_dump(FILE *f, uint8_t *buf, int size);
502void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 503
94988531 504void av_register_all(void);
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505
506typedef struct FifoBuffer {
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507 uint8_t *buffer;
508 uint8_t *rptr, *wptr, *end;
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509} FifoBuffer;
510
511int fifo_init(FifoBuffer *f, int size);
512void fifo_free(FifoBuffer *f);
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513int fifo_size(FifoBuffer *f, uint8_t *rptr);
514int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
515void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
de6d9b64 516
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517/* media file input */
518AVInputFormat *av_find_input_format(const char *short_name);
94988531 519AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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520int av_open_input_stream(AVFormatContext **ic_ptr,
521 ByteIOContext *pb, const char *filename,
522 AVInputFormat *fmt, AVFormatParameters *ap);
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523int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
524 AVInputFormat *fmt,
525 int buf_size,
526 AVFormatParameters *ap);
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527/* no av_open for output, so applications will need this: */
528AVFormatContext *av_alloc_format_context(void);
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529
530#define AVERROR_UNKNOWN (-1) /* unknown error */
531#define AVERROR_IO (-2) /* i/o error */
532#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
533#define AVERROR_INVALIDDATA (-4) /* invalid data found */
534#define AVERROR_NOMEM (-5) /* not enough memory */
535#define AVERROR_NOFMT (-6) /* unknown format */
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536#define AVERROR_NOTSUPP (-7) /* operation not supported */
537
b9a281db 538int av_find_stream_info(AVFormatContext *ic);
de6d9b64 539int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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540int av_read_frame(AVFormatContext *s, AVPacket *pkt);
541int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
542int av_read_play(AVFormatContext *s);
543int av_read_pause(AVFormatContext *s);
de6d9b64 544void av_close_input_file(AVFormatContext *s);
b9a281db 545AVStream *av_new_stream(AVFormatContext *s, int id);
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546void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
547 int pts_num, int pts_den);
de6d9b64 548
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549int av_find_default_stream_index(AVFormatContext *s);
550int av_index_search_timestamp(AVStream *st, int timestamp);
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551int av_add_index_entry(AVStream *st,
552 int64_t pos, int64_t timestamp, int distance, int flags);
b754978a 553
b9a281db 554/* media file output */
290c5fa6 555int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 556int av_write_header(AVFormatContext *s);
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557int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
558 int size);
b9a281db 559int av_write_trailer(AVFormatContext *s);
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560
561void dump_format(AVFormatContext *ic,
562 int index,
563 const char *url,
564 int is_output);
565int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 566int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 567int64_t parse_date(const char *datestr, int duration);
de6d9b64 568
0c1a9eda 569int64_t av_gettime(void);
94988531 570
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571/* ffm specific for ffserver */
572#define FFM_PACKET_SIZE 4096
573offset_t ffm_read_write_index(int fd);
574void ffm_write_write_index(int fd, offset_t pos);
575void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
576
577int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
578
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579int get_frame_filename(char *buf, int buf_size,
580 const char *path, int number);
b9a281db 581int filename_number_test(const char *filename);
96baaa6a 582
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583/* grab specific */
584int video_grab_init(void);
585int audio_init(void);
96baaa6a 586
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587/* DV1394 */
588int dv1394_init(void);
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589
590#ifdef HAVE_AV_CONFIG_H
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591
592#include "os_support.h"
593
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594int strstart(const char *str, const char *val, const char **ptr);
595int stristart(const char *str, const char *val, const char **ptr);
596void pstrcpy(char *buf, int buf_size, const char *str);
597char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 598
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599void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
600
e4e70d2e 601#ifdef __GNUC__
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602#define dynarray_add(tab, nb_ptr, elem)\
603do {\
604 typeof(tab) _tab = (tab);\
605 typeof(elem) _elem = (elem);\
606 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
607 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
608} while(0)
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609#else
610#define dynarray_add(tab, nb_ptr, elem)\
611do {\
612 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
613} while(0)
614#endif
39f472c3 615
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616time_t mktimegm(struct tm *tm);
617const char *small_strptime(const char *p, const char *fmt,
618 struct tm *dt);
619
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620struct in_addr;
621int resolve_host(struct in_addr *sin_addr, const char *hostname);
622
623void url_split(char *proto, int proto_size,
624 char *hostname, int hostname_size,
625 int *port_ptr,
626 char *path, int path_size,
627 const char *url);
628
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629int match_ext(const char *filename, const char *extensions);
630
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631#endif /* HAVE_AV_CONFIG_H */
632
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633#ifdef __cplusplus
634}
635#endif
636
fb025625 637#endif /* AVFORMAT_H */