Newer version, using a vectorized version of the
[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
77405fc8 8#define LIBAVFORMAT_BUILD 4614
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;
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230
231 /* av_read_frame() support */
232 int need_parsing;
233 struct AVCodecParserContext *parser;
6ec87caa 234
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235 int64_t cur_dts;
236 int last_IP_duration;
77405fc8 237 int64_t last_IP_pts;
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238 /* av_seek_frame() support */
239 AVIndexEntry *index_entries; /* only used if the format does not
240 support seeking natively */
241 int nb_index_entries;
242 int index_entries_allocated_size;
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243} AVStream;
244
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245#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
246 (streams are added dynamically) */
247
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248#define MAX_STREAMS 20
249
250/* format I/O context */
251typedef struct AVFormatContext {
43465395 252 AVClass *av_class; /* set by av_alloc_format_context */
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253 /* can only be iformat or oformat, not both at the same time */
254 struct AVInputFormat *iformat;
255 struct AVOutputFormat *oformat;
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256 void *priv_data;
257 ByteIOContext pb;
258 int nb_streams;
259 AVStream *streams[MAX_STREAMS];
260 char filename[1024]; /* input or output filename */
261 /* stream info */
4568325a 262 int64_t timestamp;
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263 char title[512];
264 char author[512];
265 char copyright[512];
266 char comment[512];
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267 char album[512];
268 int year; /* ID3 year, 0 if none */
269 int track; /* track number, 0 if none */
270 char genre[32]; /* ID3 genre */
271
da24c5e3 272 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 273 /* private data for pts handling (do not modify directly) */
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274 /* This buffer is only needed when packets were already buffered but
275 not decoded, for example to get the codec parameters in mpeg
276 streams */
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277 struct AVPacketList *packet_buffer;
278
279 /* decoding: position of the first frame of the component, in
280 AV_TIME_BASE fractional seconds. NEVER set this value directly:
281 it is deduced from the AVStream values. */
282 int64_t start_time;
283 /* decoding: duration of the stream, in AV_TIME_BASE fractional
284 seconds. NEVER set this value directly: it is deduced from the
285 AVStream values. */
286 int64_t duration;
287 /* decoding: total file size. 0 if unknown */
288 int64_t file_size;
289 /* decoding: total stream bitrate in bit/s, 0 if not
290 available. Never set it directly if the file_size and the
291 duration are known as ffmpeg can compute it automatically. */
292 int bit_rate;
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293
294 /* av_read_frame() support */
295 AVStream *cur_st;
296 const uint8_t *cur_ptr;
297 int cur_len;
298 AVPacket cur_pkt;
299
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300 /* av_seek_frame() support */
301 int64_t data_offset; /* offset of the first packet */
302 int index_built;
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303} AVFormatContext;
304
305typedef struct AVPacketList {
306 AVPacket pkt;
307 struct AVPacketList *next;
308} AVPacketList;
309
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310extern AVInputFormat *first_iformat;
311extern AVOutputFormat *first_oformat;
de6d9b64 312
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313/* still image support */
314struct AVInputImageContext;
315typedef struct AVInputImageContext AVInputImageContext;
316
317typedef struct AVImageInfo {
318 enum PixelFormat pix_fmt; /* requested pixel format */
319 int width; /* requested width */
320 int height; /* requested height */
7e2e1abf 321 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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322 AVPicture pict; /* returned allocated image */
323} AVImageInfo;
324
3b1a27e0 325/* AVImageFormat.flags field constants */
7e2e1abf 326#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 327
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328typedef struct AVImageFormat {
329 const char *name;
330 const char *extensions;
331 /* tell if a given file has a chance of being parsing by this format */
332 int (*img_probe)(AVProbeData *);
333 /* read a whole image. 'alloc_cb' is called when the image size is
334 known so that the caller can allocate the image. If 'allo_cb'
335 returns non zero, then the parsing is aborted. Return '0' if
336 OK. */
337 int (*img_read)(ByteIOContext *,
338 int (*alloc_cb)(void *, AVImageInfo *info), void *);
339 /* write the image */
340 int supported_pixel_formats; /* mask of supported formats for output */
341 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 342 int flags;
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343 struct AVImageFormat *next;
344} AVImageFormat;
345
346void av_register_image_format(AVImageFormat *img_fmt);
347AVImageFormat *av_probe_image_format(AVProbeData *pd);
348AVImageFormat *guess_image_format(const char *filename);
349int av_read_image(ByteIOContext *pb, const char *filename,
350 AVImageFormat *fmt,
351 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
352int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
353
354extern AVImageFormat *first_image_format;
355
356extern AVImageFormat pnm_image_format;
357extern AVImageFormat pbm_image_format;
358extern AVImageFormat pgm_image_format;
359extern AVImageFormat ppm_image_format;
8975ba81 360extern AVImageFormat pam_image_format;
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361extern AVImageFormat pgmyuv_image_format;
362extern AVImageFormat yuv_image_format;
3a13f6bd 363#ifdef CONFIG_ZLIB
0e04e4e9 364extern AVImageFormat png_image_format;
3a13f6bd 365#endif
0250738f 366extern AVImageFormat jpeg_image_format;
cdc90af0 367extern AVImageFormat gif_image_format;
6a91ec51 368extern AVImageFormat sgi_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 */
c3775e54 427int ff_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
f20dca40 443/* dv.c */
c3775e54 444int ff_dv_init(void);
f20dca40 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/* matroska.c */
487int matroska_init(void);
488
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489#include "rtp.h"
490
491#include "rtsp.h"
492
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493/* yuv4mpeg.c */
494extern AVOutputFormat yuv4mpegpipe_oformat;
495
b9a281db 496/* utils.c */
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497void av_register_input_format(AVInputFormat *format);
498void av_register_output_format(AVOutputFormat *format);
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499AVOutputFormat *guess_stream_format(const char *short_name,
500 const char *filename, const char *mime_type);
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501AVOutputFormat *guess_format(const char *short_name,
502 const char *filename, const char *mime_type);
de6d9b64 503
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504void av_hex_dump(FILE *f, uint8_t *buf, int size);
505void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 506
94988531 507void av_register_all(void);
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508
509typedef struct FifoBuffer {
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510 uint8_t *buffer;
511 uint8_t *rptr, *wptr, *end;
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512} FifoBuffer;
513
514int fifo_init(FifoBuffer *f, int size);
515void fifo_free(FifoBuffer *f);
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516int fifo_size(FifoBuffer *f, uint8_t *rptr);
517int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
518void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
de6d9b64 519
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520/* media file input */
521AVInputFormat *av_find_input_format(const char *short_name);
94988531 522AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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523int av_open_input_stream(AVFormatContext **ic_ptr,
524 ByteIOContext *pb, const char *filename,
525 AVInputFormat *fmt, AVFormatParameters *ap);
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526int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
527 AVInputFormat *fmt,
528 int buf_size,
529 AVFormatParameters *ap);
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530/* no av_open for output, so applications will need this: */
531AVFormatContext *av_alloc_format_context(void);
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532
533#define AVERROR_UNKNOWN (-1) /* unknown error */
534#define AVERROR_IO (-2) /* i/o error */
535#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
536#define AVERROR_INVALIDDATA (-4) /* invalid data found */
537#define AVERROR_NOMEM (-5) /* not enough memory */
538#define AVERROR_NOFMT (-6) /* unknown format */
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539#define AVERROR_NOTSUPP (-7) /* operation not supported */
540
b9a281db 541int av_find_stream_info(AVFormatContext *ic);
de6d9b64 542int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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543int av_read_frame(AVFormatContext *s, AVPacket *pkt);
544int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
545int av_read_play(AVFormatContext *s);
546int av_read_pause(AVFormatContext *s);
de6d9b64 547void av_close_input_file(AVFormatContext *s);
b9a281db 548AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 549void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 550 int pts_num, int pts_den);
de6d9b64 551
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552int av_find_default_stream_index(AVFormatContext *s);
553int av_index_search_timestamp(AVStream *st, int timestamp);
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554int av_add_index_entry(AVStream *st,
555 int64_t pos, int64_t timestamp, int distance, int flags);
8d14a25c 556int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts);
b754978a 557
b9a281db 558/* media file output */
290c5fa6 559int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 560int av_write_header(AVFormatContext *s);
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561int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
562 int size);
b9a281db 563int av_write_trailer(AVFormatContext *s);
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564
565void dump_format(AVFormatContext *ic,
566 int index,
567 const char *url,
568 int is_output);
569int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 570int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 571int64_t parse_date(const char *datestr, int duration);
de6d9b64 572
0c1a9eda 573int64_t av_gettime(void);
94988531 574
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575/* ffm specific for ffserver */
576#define FFM_PACKET_SIZE 4096
577offset_t ffm_read_write_index(int fd);
578void ffm_write_write_index(int fd, offset_t pos);
579void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
580
581int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
582
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583int get_frame_filename(char *buf, int buf_size,
584 const char *path, int number);
b9a281db 585int filename_number_test(const char *filename);
96baaa6a 586
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587/* grab specific */
588int video_grab_init(void);
589int audio_init(void);
96baaa6a 590
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591/* DV1394 */
592int dv1394_init(void);
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593
594#ifdef HAVE_AV_CONFIG_H
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595
596#include "os_support.h"
597
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598int strstart(const char *str, const char *val, const char **ptr);
599int stristart(const char *str, const char *val, const char **ptr);
600void pstrcpy(char *buf, int buf_size, const char *str);
601char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 602
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603void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
604
e4e70d2e 605#ifdef __GNUC__
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606#define dynarray_add(tab, nb_ptr, elem)\
607do {\
608 typeof(tab) _tab = (tab);\
609 typeof(elem) _elem = (elem);\
610 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
611 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
612} while(0)
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613#else
614#define dynarray_add(tab, nb_ptr, elem)\
615do {\
616 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
617} while(0)
618#endif
39f472c3 619
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620time_t mktimegm(struct tm *tm);
621const char *small_strptime(const char *p, const char *fmt,
622 struct tm *dt);
623
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624struct in_addr;
625int resolve_host(struct in_addr *sin_addr, const char *hostname);
626
627void url_split(char *proto, int proto_size,
628 char *hostname, int hostname_size,
629 int *port_ptr,
630 char *path, int path_size,
631 const char *url);
632
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633int match_ext(const char *filename, const char *extensions);
634
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635#endif /* HAVE_AV_CONFIG_H */
636
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637#ifdef __cplusplus
638}
639#endif
640
fb025625 641#endif /* AVFORMAT_H */