silence few warnings
[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
fb2758c8 8#define LIBAVFORMAT_BUILD 4610
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
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14#include <time.h>
15
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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
198 int flags;
199} AVIndexEntry;
200
de6d9b64 201typedef struct AVStream {
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202 int index; /* stream index in AVFormatContext */
203 int id; /* format specific stream id */
de6d9b64 204 AVCodecContext codec; /* codec context */
76c0441b 205 int r_frame_rate; /* real frame rate of the stream */
14bea432 206 int r_frame_rate_base;/* real frame rate base of the stream */
de6d9b64 207 void *priv_data;
b9a281db 208 /* internal data used in av_find_stream_info() */
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209 int64_t codec_info_duration;
210 int codec_info_nb_frames;
da24c5e3 211 /* encoding: PTS generation when outputing stream */
1e51d801 212 AVFrac pts;
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213 /* ffmpeg.c private use */
214 int stream_copy; /* if TRUE, just copy stream */
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215 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
216 * MN:dunno if thats the right place, for it */
217 float quality;
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218 /* decoding: position of the first frame of the component, in
219 AV_TIME_BASE fractional seconds. */
220 int64_t start_time;
221 /* decoding: duration of the stream, in AV_TIME_BASE fractional
222 seconds. */
223 int64_t duration;
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224
225 /* av_read_frame() support */
226 int need_parsing;
227 struct AVCodecParserContext *parser;
228 int got_frame;
229 int64_t cur_frame_pts;
230 int64_t cur_frame_dts;
231 int64_t cur_dts;
232 int last_IP_duration;
233 /* av_seek_frame() support */
234 AVIndexEntry *index_entries; /* only used if the format does not
235 support seeking natively */
236 int nb_index_entries;
237 int index_entries_allocated_size;
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238} AVStream;
239
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240#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
241 (streams are added dynamically) */
242
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243#define MAX_STREAMS 20
244
245/* format I/O context */
246typedef struct AVFormatContext {
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247 /* can only be iformat or oformat, not both at the same time */
248 struct AVInputFormat *iformat;
249 struct AVOutputFormat *oformat;
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250 void *priv_data;
251 ByteIOContext pb;
252 int nb_streams;
253 AVStream *streams[MAX_STREAMS];
254 char filename[1024]; /* input or output filename */
255 /* stream info */
256 char title[512];
257 char author[512];
258 char copyright[512];
259 char comment[512];
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260 char album[512];
261 int year; /* ID3 year, 0 if none */
262 int track; /* track number, 0 if none */
263 char genre[32]; /* ID3 genre */
264
da24c5e3 265 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
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266 /* private data for pts handling (do not modify directly) */
267 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
268 int pts_num, pts_den; /* value to convert to seconds */
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269 /* This buffer is only needed when packets were already buffered but
270 not decoded, for example to get the codec parameters in mpeg
271 streams */
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272 struct AVPacketList *packet_buffer;
273
274 /* decoding: position of the first frame of the component, in
275 AV_TIME_BASE fractional seconds. NEVER set this value directly:
276 it is deduced from the AVStream values. */
277 int64_t start_time;
278 /* decoding: duration of the stream, in AV_TIME_BASE fractional
279 seconds. NEVER set this value directly: it is deduced from the
280 AVStream values. */
281 int64_t duration;
282 /* decoding: total file size. 0 if unknown */
283 int64_t file_size;
284 /* decoding: total stream bitrate in bit/s, 0 if not
285 available. Never set it directly if the file_size and the
286 duration are known as ffmpeg can compute it automatically. */
287 int bit_rate;
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288
289 /* av_read_frame() support */
290 AVStream *cur_st;
291 const uint8_t *cur_ptr;
292 int cur_len;
293 AVPacket cur_pkt;
294
295 /* the following are used for pts/dts unit conversion */
296 int64_t last_pkt_stream_pts;
297 int64_t last_pkt_stream_dts;
298 int64_t last_pkt_pts;
299 int64_t last_pkt_dts;
300 int last_pkt_pts_frac;
301 int last_pkt_dts_frac;
302
303 /* av_seek_frame() support */
304 int64_t data_offset; /* offset of the first packet */
305 int index_built;
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306} AVFormatContext;
307
308typedef struct AVPacketList {
309 AVPacket pkt;
310 struct AVPacketList *next;
311} AVPacketList;
312
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313extern AVInputFormat *first_iformat;
314extern AVOutputFormat *first_oformat;
de6d9b64 315
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316/* still image support */
317struct AVInputImageContext;
318typedef struct AVInputImageContext AVInputImageContext;
319
320typedef struct AVImageInfo {
321 enum PixelFormat pix_fmt; /* requested pixel format */
322 int width; /* requested width */
323 int height; /* requested height */
7e2e1abf 324 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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325 AVPicture pict; /* returned allocated image */
326} AVImageInfo;
327
3b1a27e0 328/* AVImageFormat.flags field constants */
7e2e1abf 329#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 330
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331typedef struct AVImageFormat {
332 const char *name;
333 const char *extensions;
334 /* tell if a given file has a chance of being parsing by this format */
335 int (*img_probe)(AVProbeData *);
336 /* read a whole image. 'alloc_cb' is called when the image size is
337 known so that the caller can allocate the image. If 'allo_cb'
338 returns non zero, then the parsing is aborted. Return '0' if
339 OK. */
340 int (*img_read)(ByteIOContext *,
341 int (*alloc_cb)(void *, AVImageInfo *info), void *);
342 /* write the image */
343 int supported_pixel_formats; /* mask of supported formats for output */
344 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 345 int flags;
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346 struct AVImageFormat *next;
347} AVImageFormat;
348
349void av_register_image_format(AVImageFormat *img_fmt);
350AVImageFormat *av_probe_image_format(AVProbeData *pd);
351AVImageFormat *guess_image_format(const char *filename);
352int av_read_image(ByteIOContext *pb, const char *filename,
353 AVImageFormat *fmt,
354 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
355int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
356
357extern AVImageFormat *first_image_format;
358
359extern AVImageFormat pnm_image_format;
360extern AVImageFormat pbm_image_format;
361extern AVImageFormat pgm_image_format;
362extern AVImageFormat ppm_image_format;
8975ba81 363extern AVImageFormat pam_image_format;
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364extern AVImageFormat pgmyuv_image_format;
365extern AVImageFormat yuv_image_format;
3a13f6bd 366#ifdef CONFIG_ZLIB
0e04e4e9 367extern AVImageFormat png_image_format;
3a13f6bd 368#endif
0250738f 369extern AVImageFormat jpeg_image_format;
cdc90af0 370extern AVImageFormat gif_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 */
b9a281db 429int 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
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445/* dv.c */
446int dv_init(void);
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#include "rtp.h"
483
484#include "rtsp.h"
485
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486/* yuv4mpeg.c */
487extern AVOutputFormat yuv4mpegpipe_oformat;
488
b9a281db 489/* utils.c */
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490void av_register_input_format(AVInputFormat *format);
491void av_register_output_format(AVOutputFormat *format);
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492AVOutputFormat *guess_stream_format(const char *short_name,
493 const char *filename, const char *mime_type);
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494AVOutputFormat *guess_format(const char *short_name,
495 const char *filename, const char *mime_type);
de6d9b64 496
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497void av_hex_dump(FILE *f, uint8_t *buf, int size);
498void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 499
94988531 500void av_register_all(void);
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501
502typedef struct FifoBuffer {
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503 uint8_t *buffer;
504 uint8_t *rptr, *wptr, *end;
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505} FifoBuffer;
506
507int fifo_init(FifoBuffer *f, int size);
508void fifo_free(FifoBuffer *f);
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509int fifo_size(FifoBuffer *f, uint8_t *rptr);
510int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
511void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
de6d9b64 512
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513/* media file input */
514AVInputFormat *av_find_input_format(const char *short_name);
94988531 515AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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516int av_open_input_stream(AVFormatContext **ic_ptr,
517 ByteIOContext *pb, const char *filename,
518 AVInputFormat *fmt, AVFormatParameters *ap);
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519int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
520 AVInputFormat *fmt,
521 int buf_size,
522 AVFormatParameters *ap);
523
524#define AVERROR_UNKNOWN (-1) /* unknown error */
525#define AVERROR_IO (-2) /* i/o error */
526#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
527#define AVERROR_INVALIDDATA (-4) /* invalid data found */
528#define AVERROR_NOMEM (-5) /* not enough memory */
529#define AVERROR_NOFMT (-6) /* unknown format */
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530#define AVERROR_NOTSUPP (-7) /* operation not supported */
531
b9a281db 532int av_find_stream_info(AVFormatContext *ic);
de6d9b64 533int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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534int av_read_frame(AVFormatContext *s, AVPacket *pkt);
535int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
536int av_read_play(AVFormatContext *s);
537int av_read_pause(AVFormatContext *s);
de6d9b64 538void av_close_input_file(AVFormatContext *s);
b9a281db 539AVStream *av_new_stream(AVFormatContext *s, int id);
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540void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
541 int pts_num, int pts_den);
de6d9b64 542
b9a281db 543/* media file output */
290c5fa6 544int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 545int av_write_header(AVFormatContext *s);
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546int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
547 int size);
b9a281db 548int av_write_trailer(AVFormatContext *s);
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549
550void dump_format(AVFormatContext *ic,
551 int index,
552 const char *url,
553 int is_output);
554int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 555int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 556int64_t parse_date(const char *datestr, int duration);
de6d9b64 557
0c1a9eda 558int64_t av_gettime(void);
94988531 559
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560/* ffm specific for ffserver */
561#define FFM_PACKET_SIZE 4096
562offset_t ffm_read_write_index(int fd);
563void ffm_write_write_index(int fd, offset_t pos);
564void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
565
566int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
567
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568int get_frame_filename(char *buf, int buf_size,
569 const char *path, int number);
b9a281db 570int filename_number_test(const char *filename);
96baaa6a 571
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572/* grab specific */
573int video_grab_init(void);
574int audio_init(void);
96baaa6a 575
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576/* DV1394 */
577int dv1394_init(void);
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578
579#ifdef HAVE_AV_CONFIG_H
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580
581#include "os_support.h"
582
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583int strstart(const char *str, const char *val, const char **ptr);
584int stristart(const char *str, const char *val, const char **ptr);
585void pstrcpy(char *buf, int buf_size, const char *str);
586char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 587
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588void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
589
e4e70d2e 590#ifdef __GNUC__
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591#define dynarray_add(tab, nb_ptr, elem)\
592do {\
593 typeof(tab) _tab = (tab);\
594 typeof(elem) _elem = (elem);\
595 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
596 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
597} while(0)
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598#else
599#define dynarray_add(tab, nb_ptr, elem)\
600do {\
601 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
602} while(0)
603#endif
39f472c3 604
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605time_t mktimegm(struct tm *tm);
606const char *small_strptime(const char *p, const char *fmt,
607 struct tm *dt);
608
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609struct in_addr;
610int resolve_host(struct in_addr *sin_addr, const char *hostname);
611
612void url_split(char *proto, int proto_size,
613 char *hostname, int hostname_size,
614 int *port_ptr,
615 char *path, int path_size,
616 const char *url);
617
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618int match_ext(const char *filename, const char *extensions);
619
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620#endif /* HAVE_AV_CONFIG_H */
621
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622#ifdef __cplusplus
623}
624#endif
625
fb025625 626#endif /* AVFORMAT_H */