xvid "packed" stuff support
[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
30#define AV_NOPTS_VALUE MININT64
31#define AV_TIME_BASE 1000000
fb025625 32
de6d9b64 33typedef struct AVPacket {
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34 int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
35 pts_den units in muxers or demuxers) */
36 int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
37 pts_den units in muxers or demuxers) */
0c1a9eda 38 uint8_t *data;
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39 int size;
40 int stream_index;
41 int flags;
fb2758c8 42 int duration; /* presentation duration (0 if not available) */
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43 void (*destruct)(struct AVPacket *);
44 void *priv;
de6d9b64 45} AVPacket;
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46#define PKT_FLAG_KEY 0x0001
47
da24c5e3 48/* initialize optional fields of a packet */
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49static inline void av_init_packet(AVPacket *pkt)
50{
51 pkt->pts = AV_NOPTS_VALUE;
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52 pkt->dts = AV_NOPTS_VALUE;
53 pkt->duration = 0;
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54 pkt->flags = 0;
55 pkt->stream_index = 0;
56}
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57
58int av_new_packet(AVPacket *pkt, int size);
fb2758c8 59int av_dup_packet(AVPacket *pkt);
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60
61/**
62 * Free a packet
63 *
64 * @param pkt packet to free
65 */
66static inline void av_free_packet(AVPacket *pkt)
67{
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68 if (pkt && pkt->destruct) {
69 pkt->destruct(pkt);
70 }
6fa5a56c 71}
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72
73/*************************************************/
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74/* fractional numbers for exact pts handling */
75
76/* the exact value of the fractional number is: 'val + num / den'. num
77 is assumed to be such as 0 <= num < den */
78typedef struct AVFrac {
0c1a9eda 79 int64_t val, num, den;
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80} AVFrac;
81
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82void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
83void av_frac_add(AVFrac *f, int64_t incr);
84void av_frac_set(AVFrac *f, int64_t val);
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85
86/*************************************************/
b9a281db 87/* input/output formats */
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88
89struct AVFormatContext;
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90
91/* this structure contains the data a format has to probe a file */
92typedef struct AVProbeData {
5c91a675 93 const char *filename;
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94 unsigned char *buf;
95 int buf_size;
96} AVProbeData;
97
98#define AVPROBE_SCORE_MAX 100
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99
100typedef struct AVFormatParameters {
101 int frame_rate;
14bea432 102 int frame_rate_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} AVFormatParameters;
119
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120#define AVFMT_NOFILE 0x0001 /* no file should be opened */
121#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 122#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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123#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
124 raw picture data */
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125
126typedef struct AVOutputFormat {
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127 const char *name;
128 const char *long_name;
129 const char *mime_type;
130 const char *extensions; /* comma separated extensions */
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131 /* size of private data so that it can be allocated in the wrapper */
132 int priv_data_size;
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133 /* output support */
134 enum CodecID audio_codec; /* default audio codec */
135 enum CodecID video_codec; /* default video codec */
136 int (*write_header)(struct AVFormatContext *);
137 int (*write_packet)(struct AVFormatContext *,
138 int stream_index,
49057904 139 const uint8_t *buf, int size, int64_t pts);
de6d9b64 140 int (*write_trailer)(struct AVFormatContext *);
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141 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
142 int flags;
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143 /* currently only used to set pixel format if not YUV420P */
144 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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145 /* private fields */
146 struct AVOutputFormat *next;
147} AVOutputFormat;
de6d9b64 148
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149typedef struct AVInputFormat {
150 const char *name;
151 const char *long_name;
152 /* size of private data so that it can be allocated in the wrapper */
153 int priv_data_size;
154 /* tell if a given file has a chance of being parsing by this format */
155 int (*read_probe)(AVProbeData *);
156 /* read the format header and initialize the AVFormatContext
de6d9b64 157 structure. Return 0 if OK. 'ap' if non NULL contains
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158 additionnal paramters. Only used in raw format right
159 now. 'av_new_stream' should be called to create new streams. */
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160 int (*read_header)(struct AVFormatContext *,
161 AVFormatParameters *ap);
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162 /* read one packet and put it in 'pkt'. pts and flags are also
163 set. 'av_new_stream' can be called only if the flag
da24c5e3 164 AVFMTCTX_NOHEADER is used. */
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165 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
166 /* close the stream. The AVFormatContext and AVStreams are not
167 freed by this function */
168 int (*read_close)(struct AVFormatContext *);
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169 /* seek at or before a given timestamp (given in AV_TIME_BASE
170 units) relative to the frames in stream component stream_index */
171 int (*read_seek)(struct AVFormatContext *,
172 int stream_index, int64_t timestamp);
da24c5e3 173 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 174 int flags;
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175 /* if extensions are defined, then no probe is done. You should
176 usually not use extension format guessing because it is not
177 reliable enough */
178 const char *extensions;
179 /* general purpose read only value that the format can use */
180 int value;
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181
182 /* start/resume playing - only meaningful if using a network based format
183 (RTSP) */
184 int (*read_play)(struct AVFormatContext *);
185
186 /* pause playing - only meaningful if using a network based format
187 (RTSP) */
188 int (*read_pause)(struct AVFormatContext *);
189
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190 /* private fields */
191 struct AVInputFormat *next;
192} AVInputFormat;
de6d9b64 193
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194typedef struct AVIndexEntry {
195 int64_t pos;
196 int64_t timestamp;
197#define AVINDEX_KEYFRAME 0x0001
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198/* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
199#define AVINDEX_NEXT_KNOWN 0x0002
200#define AVINDEX_PREV_KNOWN 0x0004
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201 int flags;
202} AVIndexEntry;
203
de6d9b64 204typedef struct AVStream {
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205 int index; /* stream index in AVFormatContext */
206 int id; /* format specific stream id */
de6d9b64 207 AVCodecContext codec; /* codec context */
76c0441b 208 int r_frame_rate; /* real frame rate of the stream */
14bea432 209 int r_frame_rate_base;/* real frame rate base of the stream */
de6d9b64 210 void *priv_data;
b9a281db 211 /* internal data used in av_find_stream_info() */
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212 int64_t codec_info_duration;
213 int codec_info_nb_frames;
da24c5e3 214 /* encoding: PTS generation when outputing stream */
1e51d801 215 AVFrac pts;
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216 /* ffmpeg.c private use */
217 int stream_copy; /* if TRUE, just copy stream */
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218 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
219 * MN:dunno if thats the right place, for it */
220 float quality;
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221 /* decoding: position of the first frame of the component, in
222 AV_TIME_BASE fractional seconds. */
223 int64_t start_time;
224 /* decoding: duration of the stream, in AV_TIME_BASE fractional
225 seconds. */
226 int64_t duration;
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227
228 /* av_read_frame() support */
229 int need_parsing;
230 struct AVCodecParserContext *parser;
6ec87caa 231
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232 int64_t cur_dts;
233 int last_IP_duration;
234 /* av_seek_frame() support */
235 AVIndexEntry *index_entries; /* only used if the format does not
236 support seeking natively */
237 int nb_index_entries;
238 int index_entries_allocated_size;
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239} AVStream;
240
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241#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
242 (streams are added dynamically) */
243
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244#define MAX_STREAMS 20
245
246/* format I/O context */
247typedef struct AVFormatContext {
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248 /* can only be iformat or oformat, not both at the same time */
249 struct AVInputFormat *iformat;
250 struct AVOutputFormat *oformat;
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251 void *priv_data;
252 ByteIOContext pb;
253 int nb_streams;
254 AVStream *streams[MAX_STREAMS];
255 char filename[1024]; /* input or output filename */
256 /* stream info */
257 char title[512];
258 char author[512];
259 char copyright[512];
260 char comment[512];
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261 char album[512];
262 int year; /* ID3 year, 0 if none */
263 int track; /* track number, 0 if none */
264 char genre[32]; /* ID3 genre */
265
da24c5e3 266 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
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267 /* private data for pts handling (do not modify directly) */
268 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
269 int pts_num, pts_den; /* value to convert to seconds */
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270 /* This buffer is only needed when packets were already buffered but
271 not decoded, for example to get the codec parameters in mpeg
272 streams */
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273 struct AVPacketList *packet_buffer;
274
275 /* decoding: position of the first frame of the component, in
276 AV_TIME_BASE fractional seconds. NEVER set this value directly:
277 it is deduced from the AVStream values. */
278 int64_t start_time;
279 /* decoding: duration of the stream, in AV_TIME_BASE fractional
280 seconds. NEVER set this value directly: it is deduced from the
281 AVStream values. */
282 int64_t duration;
283 /* decoding: total file size. 0 if unknown */
284 int64_t file_size;
285 /* decoding: total stream bitrate in bit/s, 0 if not
286 available. Never set it directly if the file_size and the
287 duration are known as ffmpeg can compute it automatically. */
288 int bit_rate;
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289
290 /* av_read_frame() support */
291 AVStream *cur_st;
292 const uint8_t *cur_ptr;
293 int cur_len;
294 AVPacket cur_pkt;
295
296 /* the following are used for pts/dts unit conversion */
297 int64_t last_pkt_stream_pts;
298 int64_t last_pkt_stream_dts;
299 int64_t last_pkt_pts;
300 int64_t last_pkt_dts;
301 int last_pkt_pts_frac;
302 int last_pkt_dts_frac;
303
304 /* av_seek_frame() support */
305 int64_t data_offset; /* offset of the first packet */
306 int index_built;
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307} AVFormatContext;
308
309typedef struct AVPacketList {
310 AVPacket pkt;
311 struct AVPacketList *next;
312} AVPacketList;
313
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314extern AVInputFormat *first_iformat;
315extern AVOutputFormat *first_oformat;
de6d9b64 316
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317/* still image support */
318struct AVInputImageContext;
319typedef struct AVInputImageContext AVInputImageContext;
320
321typedef struct AVImageInfo {
322 enum PixelFormat pix_fmt; /* requested pixel format */
323 int width; /* requested width */
324 int height; /* requested height */
7e2e1abf 325 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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326 AVPicture pict; /* returned allocated image */
327} AVImageInfo;
328
3b1a27e0 329/* AVImageFormat.flags field constants */
7e2e1abf 330#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 331
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332typedef struct AVImageFormat {
333 const char *name;
334 const char *extensions;
335 /* tell if a given file has a chance of being parsing by this format */
336 int (*img_probe)(AVProbeData *);
337 /* read a whole image. 'alloc_cb' is called when the image size is
338 known so that the caller can allocate the image. If 'allo_cb'
339 returns non zero, then the parsing is aborted. Return '0' if
340 OK. */
341 int (*img_read)(ByteIOContext *,
342 int (*alloc_cb)(void *, AVImageInfo *info), void *);
343 /* write the image */
344 int supported_pixel_formats; /* mask of supported formats for output */
345 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 346 int flags;
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347 struct AVImageFormat *next;
348} AVImageFormat;
349
350void av_register_image_format(AVImageFormat *img_fmt);
351AVImageFormat *av_probe_image_format(AVProbeData *pd);
352AVImageFormat *guess_image_format(const char *filename);
353int av_read_image(ByteIOContext *pb, const char *filename,
354 AVImageFormat *fmt,
355 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
356int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
357
358extern AVImageFormat *first_image_format;
359
360extern AVImageFormat pnm_image_format;
361extern AVImageFormat pbm_image_format;
362extern AVImageFormat pgm_image_format;
363extern AVImageFormat ppm_image_format;
8975ba81 364extern AVImageFormat pam_image_format;
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365extern AVImageFormat pgmyuv_image_format;
366extern AVImageFormat yuv_image_format;
3a13f6bd 367#ifdef CONFIG_ZLIB
0e04e4e9 368extern AVImageFormat png_image_format;
3a13f6bd 369#endif
0250738f 370extern AVImageFormat jpeg_image_format;
cdc90af0 371extern AVImageFormat gif_image_format;
290c5fa6 372
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373/* XXX: use automatic init with either ELF sections or C file parser */
374/* modules */
de6d9b64 375
b9a281db 376/* mpeg.c */
ee404803 377extern AVInputFormat mpegps_demux;
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378int mpegps_init(void);
379
380/* mpegts.c */
381extern AVInputFormat mpegts_demux;
382int mpegts_init(void);
de6d9b64 383
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384/* rm.c */
385int rm_init(void);
386
387/* crc.c */
388int crc_init(void);
389
390/* img.c */
391int img_init(void);
392
393/* asf.c */
394int asf_init(void);
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395
396/* avienc.c */
b9a281db 397int avienc_init(void);
de6d9b64 398
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399/* avidec.c */
400int avidec_init(void);
6cea494e 401
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402/* swf.c */
403int swf_init(void);
404
405/* mov.c */
406int mov_init(void);
de6d9b64 407
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408/* movenc.c */
409int movenc_init(void);
410
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411/* flvenc.c */
412int flvenc_init(void);
413
414/* flvdec.c */
415int flvdec_init(void);
416
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417/* jpeg.c */
418int jpeg_init(void);
de6d9b64 419
6cea494e 420/* gif.c */
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421int gif_init(void);
422
6cea494e 423/* au.c */
b9a281db 424int au_init(void);
6cea494e 425
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426/* amr.c */
427int amr_init(void);
428
de6d9b64 429/* wav.c */
b9a281db 430int wav_init(void);
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431
432/* raw.c */
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433int pcm_read_seek(AVFormatContext *s,
434 int stream_index, int64_t timestamp);
b9a281db 435int raw_init(void);
de6d9b64 436
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437/* mp3.c */
438int mp3_init(void);
439
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440/* yuv4mpeg.c */
441int yuv4mpeg_init(void);
442
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443/* ogg.c */
444int ogg_init(void);
445
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446/* dv.c */
447int dv_init(void);
448
de6d9b64 449/* ffm.c */
b9a281db 450int ffm_init(void);
de6d9b64 451
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452/* rtsp.c */
453extern AVInputFormat redir_demux;
454int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
455
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456/* 4xm.c */
457int fourxm_init(void);
458
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459/* psxstr.c */
460int str_init(void);
461
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462/* idroq.c */
463int roq_init(void);
464
465/* ipmovie.c */
466int ipmovie_init(void);
467
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468/* nut.c */
469int nut_init(void);
470
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471/* wc3movie.c */
472int wc3_init(void);
473
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474/* westwood.c */
475int westwood_init(void);
476
477/* segafilm.c */
478int film_init(void);
479
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480/* idcin.c */
481int idcin_init(void);
482
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483/* flic.c */
484int flic_init(void);
485
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486/* sierravmd.c */
487int vmd_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);
530
531#define AVERROR_UNKNOWN (-1) /* unknown error */
532#define AVERROR_IO (-2) /* i/o error */
533#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
534#define AVERROR_INVALIDDATA (-4) /* invalid data found */
535#define AVERROR_NOMEM (-5) /* not enough memory */
536#define AVERROR_NOFMT (-6) /* unknown format */
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537#define AVERROR_NOTSUPP (-7) /* operation not supported */
538
b9a281db 539int av_find_stream_info(AVFormatContext *ic);
de6d9b64 540int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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541int av_read_frame(AVFormatContext *s, AVPacket *pkt);
542int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
543int av_read_play(AVFormatContext *s);
544int av_read_pause(AVFormatContext *s);
de6d9b64 545void av_close_input_file(AVFormatContext *s);
b9a281db 546AVStream *av_new_stream(AVFormatContext *s, int id);
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547void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
548 int pts_num, int pts_den);
de6d9b64 549
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550int av_find_default_stream_index(AVFormatContext *s);
551int av_index_search_timestamp(AVStream *st, int timestamp);
552void av_add_index_entry(AVStream *st,
553 int64_t pos, int64_t timestamp, int flags);
554
b9a281db 555/* media file output */
290c5fa6 556int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 557int av_write_header(AVFormatContext *s);
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558int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
559 int size);
b9a281db 560int av_write_trailer(AVFormatContext *s);
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561
562void dump_format(AVFormatContext *ic,
563 int index,
564 const char *url,
565 int is_output);
566int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 567int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 568int64_t parse_date(const char *datestr, int duration);
de6d9b64 569
0c1a9eda 570int64_t av_gettime(void);
94988531 571
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572/* ffm specific for ffserver */
573#define FFM_PACKET_SIZE 4096
574offset_t ffm_read_write_index(int fd);
575void ffm_write_write_index(int fd, offset_t pos);
576void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
577
578int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
579
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580int get_frame_filename(char *buf, int buf_size,
581 const char *path, int number);
b9a281db 582int filename_number_test(const char *filename);
96baaa6a 583
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584/* grab specific */
585int video_grab_init(void);
586int audio_init(void);
96baaa6a 587
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588/* DV1394 */
589int dv1394_init(void);
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590
591#ifdef HAVE_AV_CONFIG_H
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592
593#include "os_support.h"
594
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595int strstart(const char *str, const char *val, const char **ptr);
596int stristart(const char *str, const char *val, const char **ptr);
597void pstrcpy(char *buf, int buf_size, const char *str);
598char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 599
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600void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
601
e4e70d2e 602#ifdef __GNUC__
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603#define dynarray_add(tab, nb_ptr, elem)\
604do {\
605 typeof(tab) _tab = (tab);\
606 typeof(elem) _elem = (elem);\
607 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
608 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
609} while(0)
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610#else
611#define dynarray_add(tab, nb_ptr, elem)\
612do {\
613 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
614} while(0)
615#endif
39f472c3 616
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617time_t mktimegm(struct tm *tm);
618const char *small_strptime(const char *p, const char *fmt,
619 struct tm *dt);
620
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621struct in_addr;
622int resolve_host(struct in_addr *sin_addr, const char *hostname);
623
624void url_split(char *proto, int proto_size,
625 char *hostname, int hostname_size,
626 int *port_ptr,
627 char *path, int path_size,
628 const char *url);
629
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630int match_ext(const char *filename, const char *extensions);
631
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632#endif /* HAVE_AV_CONFIG_H */
633
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634#ifdef __cplusplus
635}
636#endif
637
fb025625 638#endif /* AVFORMAT_H */