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