store index for seeking in the native timebase of each stream
[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
cdd5034f 8#define LIBAVFORMAT_BUILD 4613
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);
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170 /**
171 * gets the next timestamp in AV_TIME_BASE units.
172 */
173 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
174 int64_t *pos, int64_t pos_limit);
da24c5e3 175 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 176 int flags;
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177 /* if extensions are defined, then no probe is done. You should
178 usually not use extension format guessing because it is not
179 reliable enough */
180 const char *extensions;
181 /* general purpose read only value that the format can use */
182 int value;
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183
184 /* start/resume playing - only meaningful if using a network based format
185 (RTSP) */
186 int (*read_play)(struct AVFormatContext *);
187
188 /* pause playing - only meaningful if using a network based format
189 (RTSP) */
190 int (*read_pause)(struct AVFormatContext *);
191
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192 /* private fields */
193 struct AVInputFormat *next;
194} AVInputFormat;
de6d9b64 195
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196typedef struct AVIndexEntry {
197 int64_t pos;
198 int64_t timestamp;
199#define AVINDEX_KEYFRAME 0x0001
b754978a 200/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
fb2758c8 201 int flags;
3e9245a9 202 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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203} AVIndexEntry;
204
de6d9b64 205typedef struct AVStream {
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206 int index; /* stream index in AVFormatContext */
207 int id; /* format specific stream id */
de6d9b64 208 AVCodecContext codec; /* codec context */
76c0441b 209 int r_frame_rate; /* real frame rate of the stream */
14bea432 210 int r_frame_rate_base;/* real frame rate base of the stream */
de6d9b64 211 void *priv_data;
b9a281db 212 /* internal data used in av_find_stream_info() */
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213 int64_t codec_info_duration;
214 int codec_info_nb_frames;
da24c5e3 215 /* encoding: PTS generation when outputing stream */
1e51d801 216 AVFrac pts;
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217 AVRational time_base;
218 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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219 /* ffmpeg.c private use */
220 int stream_copy; /* if TRUE, just copy stream */
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221 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
222 * MN:dunno if thats the right place, for it */
223 float quality;
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224 /* decoding: position of the first frame of the component, in
225 AV_TIME_BASE fractional seconds. */
226 int64_t start_time;
227 /* decoding: duration of the stream, in AV_TIME_BASE fractional
228 seconds. */
229 int64_t duration;
fb2758c8 230
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231 /* the following are used for pts/dts unit conversion */
232 int64_t last_pkt_stream_pts;
233 int64_t last_pkt_stream_dts;
234 int64_t last_pkt_pts;
235 int64_t last_pkt_dts;
236 int last_pkt_pts_frac;
237 int last_pkt_dts_frac;
238
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239 /* av_read_frame() support */
240 int need_parsing;
241 struct AVCodecParserContext *parser;
6ec87caa 242
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243 int64_t cur_dts;
244 int last_IP_duration;
245 /* av_seek_frame() support */
246 AVIndexEntry *index_entries; /* only used if the format does not
247 support seeking natively */
248 int nb_index_entries;
249 int index_entries_allocated_size;
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250} AVStream;
251
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252#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
253 (streams are added dynamically) */
254
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255#define MAX_STREAMS 20
256
257/* format I/O context */
258typedef struct AVFormatContext {
43465395 259 AVClass *av_class; /* set by av_alloc_format_context */
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260 /* can only be iformat or oformat, not both at the same time */
261 struct AVInputFormat *iformat;
262 struct AVOutputFormat *oformat;
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263 void *priv_data;
264 ByteIOContext pb;
265 int nb_streams;
266 AVStream *streams[MAX_STREAMS];
267 char filename[1024]; /* input or output filename */
268 /* stream info */
4568325a 269 int64_t timestamp;
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270 char title[512];
271 char author[512];
272 char copyright[512];
273 char comment[512];
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274 char album[512];
275 int year; /* ID3 year, 0 if none */
276 int track; /* track number, 0 if none */
277 char genre[32]; /* ID3 genre */
278
da24c5e3 279 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 280 /* private data for pts handling (do not modify directly) */
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281 /* This buffer is only needed when packets were already buffered but
282 not decoded, for example to get the codec parameters in mpeg
283 streams */
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284 struct AVPacketList *packet_buffer;
285
286 /* decoding: position of the first frame of the component, in
287 AV_TIME_BASE fractional seconds. NEVER set this value directly:
288 it is deduced from the AVStream values. */
289 int64_t start_time;
290 /* decoding: duration of the stream, in AV_TIME_BASE fractional
291 seconds. NEVER set this value directly: it is deduced from the
292 AVStream values. */
293 int64_t duration;
294 /* decoding: total file size. 0 if unknown */
295 int64_t file_size;
296 /* decoding: total stream bitrate in bit/s, 0 if not
297 available. Never set it directly if the file_size and the
298 duration are known as ffmpeg can compute it automatically. */
299 int bit_rate;
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300
301 /* av_read_frame() support */
302 AVStream *cur_st;
303 const uint8_t *cur_ptr;
304 int cur_len;
305 AVPacket cur_pkt;
306
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307 /* av_seek_frame() support */
308 int64_t data_offset; /* offset of the first packet */
309 int index_built;
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310} AVFormatContext;
311
312typedef struct AVPacketList {
313 AVPacket pkt;
314 struct AVPacketList *next;
315} AVPacketList;
316
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317extern AVInputFormat *first_iformat;
318extern AVOutputFormat *first_oformat;
de6d9b64 319
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320/* still image support */
321struct AVInputImageContext;
322typedef struct AVInputImageContext AVInputImageContext;
323
324typedef struct AVImageInfo {
325 enum PixelFormat pix_fmt; /* requested pixel format */
326 int width; /* requested width */
327 int height; /* requested height */
7e2e1abf 328 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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329 AVPicture pict; /* returned allocated image */
330} AVImageInfo;
331
3b1a27e0 332/* AVImageFormat.flags field constants */
7e2e1abf 333#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 334
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335typedef struct AVImageFormat {
336 const char *name;
337 const char *extensions;
338 /* tell if a given file has a chance of being parsing by this format */
339 int (*img_probe)(AVProbeData *);
340 /* read a whole image. 'alloc_cb' is called when the image size is
341 known so that the caller can allocate the image. If 'allo_cb'
342 returns non zero, then the parsing is aborted. Return '0' if
343 OK. */
344 int (*img_read)(ByteIOContext *,
345 int (*alloc_cb)(void *, AVImageInfo *info), void *);
346 /* write the image */
347 int supported_pixel_formats; /* mask of supported formats for output */
348 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 349 int flags;
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350 struct AVImageFormat *next;
351} AVImageFormat;
352
353void av_register_image_format(AVImageFormat *img_fmt);
354AVImageFormat *av_probe_image_format(AVProbeData *pd);
355AVImageFormat *guess_image_format(const char *filename);
356int av_read_image(ByteIOContext *pb, const char *filename,
357 AVImageFormat *fmt,
358 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
359int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
360
361extern AVImageFormat *first_image_format;
362
363extern AVImageFormat pnm_image_format;
364extern AVImageFormat pbm_image_format;
365extern AVImageFormat pgm_image_format;
366extern AVImageFormat ppm_image_format;
8975ba81 367extern AVImageFormat pam_image_format;
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368extern AVImageFormat pgmyuv_image_format;
369extern AVImageFormat yuv_image_format;
3a13f6bd 370#ifdef CONFIG_ZLIB
0e04e4e9 371extern AVImageFormat png_image_format;
3a13f6bd 372#endif
0250738f 373extern AVImageFormat jpeg_image_format;
cdc90af0 374extern AVImageFormat gif_image_format;
6a91ec51 375extern AVImageFormat sgi_image_format;
290c5fa6 376
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377/* XXX: use automatic init with either ELF sections or C file parser */
378/* modules */
de6d9b64 379
b9a281db 380/* mpeg.c */
ee404803 381extern AVInputFormat mpegps_demux;
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382int mpegps_init(void);
383
384/* mpegts.c */
385extern AVInputFormat mpegts_demux;
386int mpegts_init(void);
de6d9b64 387
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388/* rm.c */
389int rm_init(void);
390
391/* crc.c */
392int crc_init(void);
393
394/* img.c */
395int img_init(void);
396
397/* asf.c */
398int asf_init(void);
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399
400/* avienc.c */
b9a281db 401int avienc_init(void);
de6d9b64 402
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403/* avidec.c */
404int avidec_init(void);
6cea494e 405
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406/* swf.c */
407int swf_init(void);
408
409/* mov.c */
410int mov_init(void);
de6d9b64 411
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412/* movenc.c */
413int movenc_init(void);
414
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415/* flvenc.c */
416int flvenc_init(void);
417
418/* flvdec.c */
419int flvdec_init(void);
420
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421/* jpeg.c */
422int jpeg_init(void);
de6d9b64 423
6cea494e 424/* gif.c */
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425int gif_init(void);
426
6cea494e 427/* au.c */
b9a281db 428int au_init(void);
6cea494e 429
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430/* amr.c */
431int amr_init(void);
432
de6d9b64 433/* wav.c */
c3775e54 434int ff_wav_init(void);
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435
436/* raw.c */
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437int pcm_read_seek(AVFormatContext *s,
438 int stream_index, int64_t timestamp);
b9a281db 439int raw_init(void);
de6d9b64 440
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441/* mp3.c */
442int mp3_init(void);
443
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444/* yuv4mpeg.c */
445int yuv4mpeg_init(void);
446
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447/* ogg.c */
448int ogg_init(void);
449
f20dca40 450/* dv.c */
c3775e54 451int ff_dv_init(void);
f20dca40 452
de6d9b64 453/* ffm.c */
b9a281db 454int ffm_init(void);
de6d9b64 455
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456/* rtsp.c */
457extern AVInputFormat redir_demux;
458int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
459
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460/* 4xm.c */
461int fourxm_init(void);
462
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463/* psxstr.c */
464int str_init(void);
465
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466/* idroq.c */
467int roq_init(void);
468
469/* ipmovie.c */
470int ipmovie_init(void);
471
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472/* nut.c */
473int nut_init(void);
474
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475/* wc3movie.c */
476int wc3_init(void);
477
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478/* westwood.c */
479int westwood_init(void);
480
481/* segafilm.c */
482int film_init(void);
483
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484/* idcin.c */
485int idcin_init(void);
486
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487/* flic.c */
488int flic_init(void);
489
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490/* sierravmd.c */
491int vmd_init(void);
492
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493/* matroska.c */
494int matroska_init(void);
495
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496#include "rtp.h"
497
498#include "rtsp.h"
499
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500/* yuv4mpeg.c */
501extern AVOutputFormat yuv4mpegpipe_oformat;
502
b9a281db 503/* utils.c */
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504void av_register_input_format(AVInputFormat *format);
505void av_register_output_format(AVOutputFormat *format);
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506AVOutputFormat *guess_stream_format(const char *short_name,
507 const char *filename, const char *mime_type);
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508AVOutputFormat *guess_format(const char *short_name,
509 const char *filename, const char *mime_type);
de6d9b64 510
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511void av_hex_dump(FILE *f, uint8_t *buf, int size);
512void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 513
94988531 514void av_register_all(void);
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515
516typedef struct FifoBuffer {
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517 uint8_t *buffer;
518 uint8_t *rptr, *wptr, *end;
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519} FifoBuffer;
520
521int fifo_init(FifoBuffer *f, int size);
522void fifo_free(FifoBuffer *f);
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523int fifo_size(FifoBuffer *f, uint8_t *rptr);
524int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
525void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
de6d9b64 526
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527/* media file input */
528AVInputFormat *av_find_input_format(const char *short_name);
94988531 529AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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530int av_open_input_stream(AVFormatContext **ic_ptr,
531 ByteIOContext *pb, const char *filename,
532 AVInputFormat *fmt, AVFormatParameters *ap);
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533int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
534 AVInputFormat *fmt,
535 int buf_size,
536 AVFormatParameters *ap);
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537/* no av_open for output, so applications will need this: */
538AVFormatContext *av_alloc_format_context(void);
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539
540#define AVERROR_UNKNOWN (-1) /* unknown error */
541#define AVERROR_IO (-2) /* i/o error */
542#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
543#define AVERROR_INVALIDDATA (-4) /* invalid data found */
544#define AVERROR_NOMEM (-5) /* not enough memory */
545#define AVERROR_NOFMT (-6) /* unknown format */
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546#define AVERROR_NOTSUPP (-7) /* operation not supported */
547
b9a281db 548int av_find_stream_info(AVFormatContext *ic);
de6d9b64 549int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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550int av_read_frame(AVFormatContext *s, AVPacket *pkt);
551int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
552int av_read_play(AVFormatContext *s);
553int av_read_pause(AVFormatContext *s);
de6d9b64 554void av_close_input_file(AVFormatContext *s);
b9a281db 555AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 556void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 557 int pts_num, int pts_den);
de6d9b64 558
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559int av_find_default_stream_index(AVFormatContext *s);
560int av_index_search_timestamp(AVStream *st, int timestamp);
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561int av_add_index_entry(AVStream *st,
562 int64_t pos, int64_t timestamp, int distance, int flags);
8d14a25c 563int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts);
b754978a 564
b9a281db 565/* media file output */
290c5fa6 566int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 567int av_write_header(AVFormatContext *s);
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568int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
569 int size);
b9a281db 570int av_write_trailer(AVFormatContext *s);
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571
572void dump_format(AVFormatContext *ic,
573 int index,
574 const char *url,
575 int is_output);
576int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 577int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 578int64_t parse_date(const char *datestr, int duration);
de6d9b64 579
0c1a9eda 580int64_t av_gettime(void);
94988531 581
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582/* ffm specific for ffserver */
583#define FFM_PACKET_SIZE 4096
584offset_t ffm_read_write_index(int fd);
585void ffm_write_write_index(int fd, offset_t pos);
586void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
587
588int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
589
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590int get_frame_filename(char *buf, int buf_size,
591 const char *path, int number);
b9a281db 592int filename_number_test(const char *filename);
96baaa6a 593
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594/* grab specific */
595int video_grab_init(void);
596int audio_init(void);
96baaa6a 597
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598/* DV1394 */
599int dv1394_init(void);
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600
601#ifdef HAVE_AV_CONFIG_H
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602
603#include "os_support.h"
604
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605int strstart(const char *str, const char *val, const char **ptr);
606int stristart(const char *str, const char *val, const char **ptr);
607void pstrcpy(char *buf, int buf_size, const char *str);
608char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 609
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610void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
611
e4e70d2e 612#ifdef __GNUC__
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613#define dynarray_add(tab, nb_ptr, elem)\
614do {\
615 typeof(tab) _tab = (tab);\
616 typeof(elem) _elem = (elem);\
617 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
618 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
619} while(0)
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620#else
621#define dynarray_add(tab, nb_ptr, elem)\
622do {\
623 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
624} while(0)
625#endif
39f472c3 626
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627time_t mktimegm(struct tm *tm);
628const char *small_strptime(const char *p, const char *fmt,
629 struct tm *dt);
630
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631struct in_addr;
632int resolve_host(struct in_addr *sin_addr, const char *hostname);
633
634void url_split(char *proto, int proto_size,
635 char *hostname, int hostname_size,
636 int *port_ptr,
637 char *path, int path_size,
638 const char *url);
639
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640int match_ext(const char *filename, const char *extensions);
641
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642#endif /* HAVE_AV_CONFIG_H */
643
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644#ifdef __cplusplus
645}
646#endif
647
fb025625 648#endif /* AVFORMAT_H */