Add/improve PPC64 support. On such machines, "uname -m" returns "ppc64,
[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
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8#define LIBAVFORMAT_VERSION_INT ((50<<16)+(4<<8)+0)
9#define LIBAVFORMAT_VERSION 50.4.0
5aa083ee 10#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
8026c3b5 11
5aa083ee 12#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
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 time_base units
32 int64_t dts; ///< decompression time stamp in time_base units
0c1a9eda 33 uint8_t *data;
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34 int size;
35 int stream_index;
36 int flags;
2692067a 37 int duration; ///< presentation duration in time_base units (0 if not available)
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38 void (*destruct)(struct AVPacket *);
39 void *priv;
2692067a 40 int64_t pos; ///< byte position in stream, -1 if unknown
115329f1 41} AVPacket;
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42#define PKT_FLAG_KEY 0x0001
43
63dd1377 44void av_destruct_packet_nofree(AVPacket *pkt);
90ad92b3 45void av_destruct_packet(AVPacket *pkt);
63dd1377 46
da24c5e3 47/* initialize optional fields of a packet */
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48static inline void av_init_packet(AVPacket *pkt)
49{
50 pkt->pts = AV_NOPTS_VALUE;
fb2758c8 51 pkt->dts = AV_NOPTS_VALUE;
2692067a 52 pkt->pos = -1;
fb2758c8 53 pkt->duration = 0;
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54 pkt->flags = 0;
55 pkt->stream_index = 0;
63dd1377 56 pkt->destruct= av_destruct_packet_nofree;
6fa5a56c 57}
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58
59int av_new_packet(AVPacket *pkt, int size);
2692067a 60int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
fb2758c8 61int av_dup_packet(AVPacket *pkt);
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62
63/**
64 * Free a packet
65 *
66 * @param pkt packet to free
67 */
68static inline void av_free_packet(AVPacket *pkt)
69{
342474ab 70 if (pkt && pkt->destruct) {
bb270c08 71 pkt->destruct(pkt);
342474ab 72 }
6fa5a56c 73}
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74
75/*************************************************/
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76/* fractional numbers for exact pts handling */
77
78/* the exact value of the fractional number is: 'val + num / den'. num
79 is assumed to be such as 0 <= num < den */
80typedef struct AVFrac {
115329f1 81 int64_t val, num, den;
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82} AVFrac;
83
916c80e9 84/*************************************************/
b9a281db 85/* input/output formats */
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86
87struct AVFormatContext;
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88
89/* this structure contains the data a format has to probe a file */
90typedef struct AVProbeData {
5c91a675 91 const char *filename;
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92 unsigned char *buf;
93 int buf_size;
94} AVProbeData;
95
96#define AVPROBE_SCORE_MAX 100
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97
98typedef struct AVFormatParameters {
c0df9d75 99 AVRational time_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;
7f172339 106 int channel; /* used to select dv channel */
6beefa40 107 const char *device; /* video, 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 enum CodecID video_codec_id;
116 enum CodecID audio_codec_id;
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117} AVFormatParameters;
118
b9a281db 119#define AVFMT_NOFILE 0x0001 /* no file should be opened */
115329f1 120#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 121#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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122#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
123 raw picture data */
c64d476c 124#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
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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 *);
e928649b 137 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 138 int (*write_trailer)(struct AVFormatContext *);
c64d476c 139 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 140 int flags;
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141 /* currently only used to set pixel format if not YUV420P */
142 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
fe2d6fe2 143 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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144 /* private fields */
145 struct AVOutputFormat *next;
146} AVOutputFormat;
de6d9b64 147
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148typedef struct AVInputFormat {
149 const char *name;
150 const char *long_name;
151 /* size of private data so that it can be allocated in the wrapper */
152 int priv_data_size;
153 /* tell if a given file has a chance of being parsing by this format */
154 int (*read_probe)(AVProbeData *);
155 /* read the format header and initialize the AVFormatContext
de6d9b64 156 structure. Return 0 if OK. 'ap' if non NULL contains
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157 additionnal paramters. Only used in raw format right
158 now. 'av_new_stream' should be called to create new streams. */
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159 int (*read_header)(struct AVFormatContext *,
160 AVFormatParameters *ap);
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161 /* read one packet and put it in 'pkt'. pts and flags are also
162 set. 'av_new_stream' can be called only if the flag
da24c5e3 163 AVFMTCTX_NOHEADER is used. */
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164 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
165 /* close the stream. The AVFormatContext and AVStreams are not
166 freed by this function */
167 int (*read_close)(struct AVFormatContext *);
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168 /**
169 * seek to a given timestamp relative to the frames in
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170 * stream component stream_index
171 * @param stream_index must not be -1
115329f1 172 * @param flags selects which direction should be preferred if no exact
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173 * match is available
174 */
115329f1 175 int (*read_seek)(struct AVFormatContext *,
3ba1438d 176 int stream_index, int64_t timestamp, int flags);
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177 /**
178 * gets the next timestamp in AV_TIME_BASE units.
179 */
180 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
181 int64_t *pos, int64_t pos_limit);
da24c5e3 182 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 183 int flags;
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184 /* if extensions are defined, then no probe is done. You should
185 usually not use extension format guessing because it is not
186 reliable enough */
187 const char *extensions;
188 /* general purpose read only value that the format can use */
189 int value;
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190
191 /* start/resume playing - only meaningful if using a network based format
192 (RTSP) */
193 int (*read_play)(struct AVFormatContext *);
194
195 /* pause playing - only meaningful if using a network based format
196 (RTSP) */
197 int (*read_pause)(struct AVFormatContext *);
198
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199 /* private fields */
200 struct AVInputFormat *next;
201} AVInputFormat;
de6d9b64 202
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203typedef struct AVIndexEntry {
204 int64_t pos;
205 int64_t timestamp;
206#define AVINDEX_KEYFRAME 0x0001
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207 int flags:2;
208 int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
3e9245a9 209 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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210} AVIndexEntry;
211
de6d9b64 212typedef struct AVStream {
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213 int index; /* stream index in AVFormatContext */
214 int id; /* format specific stream id */
01f4895c 215 AVCodecContext *codec; /* codec context */
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216 /**
217 * real base frame rate of the stream.
115329f1 218 * for example if the timebase is 1/90000 and all frames have either
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219 * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
220 */
221 AVRational r_frame_rate;
de6d9b64 222 void *priv_data;
b9a281db 223 /* internal data used in av_find_stream_info() */
115329f1 224 int64_t codec_info_duration;
fb2758c8 225 int codec_info_nb_frames;
da24c5e3 226 /* encoding: PTS generation when outputing stream */
1e51d801 227 AVFrac pts;
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228
229 /**
230 * this is the fundamental unit of time (in seconds) in terms
231 * of which frame timestamps are represented. for fixed-fps content,
232 * timebase should be 1/framerate and timestamp increments should be
233 * identically 1.
234 */
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235 AVRational time_base;
236 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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237 /* ffmpeg.c private use */
238 int stream_copy; /* if TRUE, just copy stream */
f3356e9c 239 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
b4aea108 240 //FIXME move stuff to a flags field?
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241 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
242 * MN:dunno if thats the right place, for it */
115329f1 243 float quality;
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244 /* decoding: position of the first frame of the component, in
245 AV_TIME_BASE fractional seconds. */
115329f1 246 int64_t start_time;
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247 /* decoding: duration of the stream, in AV_TIME_BASE fractional
248 seconds. */
249 int64_t duration;
fb2758c8 250
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251 char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */
252
fb2758c8 253 /* av_read_frame() support */
7cbaa7ba 254 int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
fb2758c8 255 struct AVCodecParserContext *parser;
6ec87caa 256
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257 int64_t cur_dts;
258 int last_IP_duration;
77405fc8 259 int64_t last_IP_pts;
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260 /* av_seek_frame() support */
261 AVIndexEntry *index_entries; /* only used if the format does not
262 support seeking natively */
263 int nb_index_entries;
264 int index_entries_allocated_size;
115329f1 265
b4b87d48 266 int64_t nb_frames; ///< number of frames in this stream if known or 0
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267} AVStream;
268
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269#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
270 (streams are added dynamically) */
271
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272#define MAX_STREAMS 20
273
274/* format I/O context */
275typedef struct AVFormatContext {
7fea94ce 276 const AVClass *av_class; /* set by av_alloc_format_context */
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277 /* can only be iformat or oformat, not both at the same time */
278 struct AVInputFormat *iformat;
279 struct AVOutputFormat *oformat;
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280 void *priv_data;
281 ByteIOContext pb;
282 int nb_streams;
283 AVStream *streams[MAX_STREAMS];
284 char filename[1024]; /* input or output filename */
285 /* stream info */
4568325a 286 int64_t timestamp;
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287 char title[512];
288 char author[512];
289 char copyright[512];
290 char comment[512];
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291 char album[512];
292 int year; /* ID3 year, 0 if none */
293 int track; /* track number, 0 if none */
294 char genre[32]; /* ID3 genre */
295
da24c5e3 296 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 297 /* private data for pts handling (do not modify directly) */
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298 /* This buffer is only needed when packets were already buffered but
299 not decoded, for example to get the codec parameters in mpeg
300 streams */
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301 struct AVPacketList *packet_buffer;
302
303 /* decoding: position of the first frame of the component, in
304 AV_TIME_BASE fractional seconds. NEVER set this value directly:
305 it is deduced from the AVStream values. */
115329f1 306 int64_t start_time;
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307 /* decoding: duration of the stream, in AV_TIME_BASE fractional
308 seconds. NEVER set this value directly: it is deduced from the
309 AVStream values. */
310 int64_t duration;
311 /* decoding: total file size. 0 if unknown */
312 int64_t file_size;
313 /* decoding: total stream bitrate in bit/s, 0 if not
314 available. Never set it directly if the file_size and the
315 duration are known as ffmpeg can compute it automatically. */
316 int bit_rate;
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317
318 /* av_read_frame() support */
319 AVStream *cur_st;
320 const uint8_t *cur_ptr;
321 int cur_len;
322 AVPacket cur_pkt;
323
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324 /* av_seek_frame() support */
325 int64_t data_offset; /* offset of the first packet */
326 int index_built;
115329f1 327
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328 int mux_rate;
329 int packet_size;
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330 int preload;
331 int max_delay;
8108551a 332
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333#define AVFMT_NOOUTPUTLOOP -1
334#define AVFMT_INFINITEOUTPUTLOOP 0
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335 /* number of times to loop output in formats that support it */
336 int loop_output;
115329f1 337
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338 int flags;
339#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
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340} AVFormatContext;
341
342typedef struct AVPacketList {
343 AVPacket pkt;
344 struct AVPacketList *next;
345} AVPacketList;
346
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347extern AVInputFormat *first_iformat;
348extern AVOutputFormat *first_oformat;
de6d9b64 349
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350/* still image support */
351struct AVInputImageContext;
352typedef struct AVInputImageContext AVInputImageContext;
353
354typedef struct AVImageInfo {
355 enum PixelFormat pix_fmt; /* requested pixel format */
356 int width; /* requested width */
357 int height; /* requested height */
7e2e1abf 358 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
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359 AVPicture pict; /* returned allocated image */
360} AVImageInfo;
361
3b1a27e0 362/* AVImageFormat.flags field constants */
7e2e1abf 363#define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
3b1a27e0 364
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365typedef struct AVImageFormat {
366 const char *name;
367 const char *extensions;
368 /* tell if a given file has a chance of being parsing by this format */
369 int (*img_probe)(AVProbeData *);
370 /* read a whole image. 'alloc_cb' is called when the image size is
371 known so that the caller can allocate the image. If 'allo_cb'
372 returns non zero, then the parsing is aborted. Return '0' if
373 OK. */
115329f1 374 int (*img_read)(ByteIOContext *,
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375 int (*alloc_cb)(void *, AVImageInfo *info), void *);
376 /* write the image */
377 int supported_pixel_formats; /* mask of supported formats for output */
378 int (*img_write)(ByteIOContext *, AVImageInfo *);
3b1a27e0 379 int flags;
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380 struct AVImageFormat *next;
381} AVImageFormat;
382
383void av_register_image_format(AVImageFormat *img_fmt);
384AVImageFormat *av_probe_image_format(AVProbeData *pd);
385AVImageFormat *guess_image_format(const char *filename);
5b6d5596 386enum CodecID av_guess_image2_codec(const char *filename);
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387int av_read_image(ByteIOContext *pb, const char *filename,
388 AVImageFormat *fmt,
389 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
390int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
391
392extern AVImageFormat *first_image_format;
290c5fa6 393
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394/* XXX: use automatic init with either ELF sections or C file parser */
395/* modules */
de6d9b64 396
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397#include "rtp.h"
398
399#include "rtsp.h"
400
290c5fa6 401/* yuv4mpeg.c */
d2a067d1 402extern AVOutputFormat yuv4mpegpipe_muxer;
290c5fa6 403
b9a281db 404/* utils.c */
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405void av_register_input_format(AVInputFormat *format);
406void av_register_output_format(AVOutputFormat *format);
115329f1 407AVOutputFormat *guess_stream_format(const char *short_name,
36ada60c 408 const char *filename, const char *mime_type);
115329f1 409AVOutputFormat *guess_format(const char *short_name,
b9a281db 410 const char *filename, const char *mime_type);
115329f1 411enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
5b6d5596 412 const char *filename, const char *mime_type, enum CodecType type);
de6d9b64 413
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414void av_hex_dump(FILE *f, uint8_t *buf, int size);
415void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 416
94988531 417void av_register_all(void);
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418
419typedef struct FifoBuffer {
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420 uint8_t *buffer;
421 uint8_t *rptr, *wptr, *end;
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422} FifoBuffer;
423
424int fifo_init(FifoBuffer *f, int size);
425void fifo_free(FifoBuffer *f);
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426int fifo_size(FifoBuffer *f, uint8_t *rptr);
427int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
a97c1e93 428void fifo_write(FifoBuffer *f, const uint8_t *buf, int size, uint8_t **wptr_ptr);
7000a175 429int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
568e18b1 430void fifo_realloc(FifoBuffer *f, unsigned int size);
de6d9b64 431
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432/* media file input */
433AVInputFormat *av_find_input_format(const char *short_name);
94988531 434AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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435int av_open_input_stream(AVFormatContext **ic_ptr,
436 ByteIOContext *pb, const char *filename,
da24c5e3 437 AVInputFormat *fmt, AVFormatParameters *ap);
115329f1 438int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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439 AVInputFormat *fmt,
440 int buf_size,
441 AVFormatParameters *ap);
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442/* no av_open for output, so applications will need this: */
443AVFormatContext *av_alloc_format_context(void);
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444
445#define AVERROR_UNKNOWN (-1) /* unknown error */
446#define AVERROR_IO (-2) /* i/o error */
447#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
448#define AVERROR_INVALIDDATA (-4) /* invalid data found */
449#define AVERROR_NOMEM (-5) /* not enough memory */
450#define AVERROR_NOFMT (-6) /* unknown format */
fb2758c8 451#define AVERROR_NOTSUPP (-7) /* operation not supported */
115329f1 452
b9a281db 453int av_find_stream_info(AVFormatContext *ic);
de6d9b64 454int av_read_packet(AVFormatContext *s, AVPacket *pkt);
fb2758c8 455int av_read_frame(AVFormatContext *s, AVPacket *pkt);
3ba1438d 456int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
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457int av_read_play(AVFormatContext *s);
458int av_read_pause(AVFormatContext *s);
de6d9b64 459void av_close_input_file(AVFormatContext *s);
b9a281db 460AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 461void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 462 int pts_num, int pts_den);
de6d9b64 463
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464#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
465#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
27a5fe5f 466#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
3ba1438d 467
b754978a 468int av_find_default_stream_index(AVFormatContext *s);
dc56fc38 469int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
3e9245a9 470int av_add_index_entry(AVStream *st,
30a43f2d 471 int64_t pos, int64_t timestamp, int size, int distance, int flags);
3ba1438d 472int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
b754978a 473
b9a281db 474/* media file output */
290c5fa6 475int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 476int av_write_header(AVFormatContext *s);
e928649b 477int av_write_frame(AVFormatContext *s, AVPacket *pkt);
3c895fc0 478int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
e928649b 479
b9a281db 480int av_write_trailer(AVFormatContext *s);
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481
482void dump_format(AVFormatContext *ic,
115329f1 483 int index,
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484 const char *url,
485 int is_output);
486int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 487int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 488int64_t parse_date(const char *datestr, int duration);
de6d9b64 489
0c1a9eda 490int64_t av_gettime(void);
94988531 491
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492/* ffm specific for ffserver */
493#define FFM_PACKET_SIZE 4096
494offset_t ffm_read_write_index(int fd);
495void ffm_write_write_index(int fd, offset_t pos);
496void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
497
498int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
499
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500int get_frame_filename(char *buf, int buf_size,
501 const char *path, int number);
b9a281db 502int filename_number_test(const char *filename);
96baaa6a 503
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504/* grab specific */
505int video_grab_init(void);
506int audio_init(void);
96baaa6a 507
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508/* DV1394 */
509int dv1394_init(void);
f02be79d 510int dc1394_init(void);
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511
512#ifdef HAVE_AV_CONFIG_H
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513
514#include "os_support.h"
515
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516int strstart(const char *str, const char *val, const char **ptr);
517int stristart(const char *str, const char *val, const char **ptr);
518void pstrcpy(char *buf, int buf_size, const char *str);
519char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 520
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521void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
522
e4e70d2e 523#ifdef __GNUC__
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524#define dynarray_add(tab, nb_ptr, elem)\
525do {\
526 typeof(tab) _tab = (tab);\
527 typeof(elem) _elem = (elem);\
528 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
529 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
530} while(0)
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531#else
532#define dynarray_add(tab, nb_ptr, elem)\
533do {\
534 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
535} while(0)
536#endif
39f472c3 537
f71869a4 538time_t mktimegm(struct tm *tm);
0c9fc6e1 539struct tm *brktimegm(time_t secs, struct tm *tm);
115329f1 540const char *small_strptime(const char *p, const char *fmt,
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541 struct tm *dt);
542
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543struct in_addr;
544int resolve_host(struct in_addr *sin_addr, const char *hostname);
545
546void url_split(char *proto, int proto_size,
6ba5cbc6 547 char *authorization, int authorization_size,
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548 char *hostname, int hostname_size,
549 int *port_ptr,
550 char *path, int path_size,
551 const char *url);
552
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553int match_ext(const char *filename, const char *extensions);
554
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555#endif /* HAVE_AV_CONFIG_H */
556
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557#ifdef __cplusplus
558}
559#endif
560
fb025625 561#endif /* AVFORMAT_H */
f3356e9c 562