Remove unused libac3 AC3 decoding interface.
[libav.git] / libavformat / avformat.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21#ifndef AVFORMAT_H
22#define AVFORMAT_H
de6d9b64 23
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24#ifdef __cplusplus
25extern "C" {
26#endif
27
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28#define LIBAVFORMAT_VERSION_INT ((51<<16)+(8<<8)+0)
29#define LIBAVFORMAT_VERSION 51.8.0
5aa083ee 30#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
8026c3b5 31
5aa083ee 32#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
4b1f4f23 33
f71869a4 34#include <time.h>
67070e4f 35#include <stdio.h> /* FILE */
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36#include "avcodec.h"
37
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38#include "avio.h"
39
40/* packet functions */
41
42typedef struct AVPacket {
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43 int64_t pts; ///< presentation time stamp in time_base units
44 int64_t dts; ///< decompression time stamp in time_base units
0c1a9eda 45 uint8_t *data;
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46 int size;
47 int stream_index;
48 int flags;
2692067a 49 int duration; ///< presentation duration in time_base units (0 if not available)
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50 void (*destruct)(struct AVPacket *);
51 void *priv;
2692067a 52 int64_t pos; ///< byte position in stream, -1 if unknown
115329f1 53} AVPacket;
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54#define PKT_FLAG_KEY 0x0001
55
63dd1377 56void av_destruct_packet_nofree(AVPacket *pkt);
90ad92b3 57void av_destruct_packet(AVPacket *pkt);
63dd1377 58
da24c5e3 59/* initialize optional fields of a packet */
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60static inline void av_init_packet(AVPacket *pkt)
61{
62 pkt->pts = AV_NOPTS_VALUE;
fb2758c8 63 pkt->dts = AV_NOPTS_VALUE;
2692067a 64 pkt->pos = -1;
fb2758c8 65 pkt->duration = 0;
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66 pkt->flags = 0;
67 pkt->stream_index = 0;
63dd1377 68 pkt->destruct= av_destruct_packet_nofree;
6fa5a56c 69}
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70
71int av_new_packet(AVPacket *pkt, int size);
2692067a 72int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
fb2758c8 73int av_dup_packet(AVPacket *pkt);
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74
75/**
76 * Free a packet
77 *
78 * @param pkt packet to free
79 */
80static inline void av_free_packet(AVPacket *pkt)
81{
342474ab 82 if (pkt && pkt->destruct) {
bb270c08 83 pkt->destruct(pkt);
342474ab 84 }
6fa5a56c 85}
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86
87/*************************************************/
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88/* fractional numbers for exact pts handling */
89
90/* the exact value of the fractional number is: 'val + num / den'. num
91 is assumed to be such as 0 <= num < den */
92typedef struct AVFrac {
115329f1 93 int64_t val, num, den;
955ab9a4 94} AVFrac attribute_deprecated;
916c80e9 95
916c80e9 96/*************************************************/
b9a281db 97/* input/output formats */
de6d9b64 98
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99struct AVCodecTag;
100
de6d9b64 101struct AVFormatContext;
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102
103/* this structure contains the data a format has to probe a file */
104typedef struct AVProbeData {
5c91a675 105 const char *filename;
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106 unsigned char *buf;
107 int buf_size;
108} AVProbeData;
109
0288a747 110#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
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111
112typedef struct AVFormatParameters {
c0df9d75 113 AVRational time_base;
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114 int sample_rate;
115 int channels;
116 int width;
117 int height;
4606ac8d 118 enum PixelFormat pix_fmt;
7f172339 119 int channel; /* used to select dv channel */
6beefa40 120 const char *device; /* video, audio or DV device */
e3ee3283 121 const char *standard; /* tv standard, NTSC, PAL, SECAM */
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122 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
123 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
124 stream packet (only meaningful if
125 mpeg2ts_raw is TRUE */
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126 int initial_pause:1; /* do not begin to play the stream
127 immediately (RTSP only) */
4eb72c6b 128 int prealloced_context:1;
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129 enum CodecID video_codec_id;
130 enum CodecID audio_codec_id;
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131} AVFormatParameters;
132
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133//! demuxer will use url_fopen, no opened file should be provided by the caller
134#define AVFMT_NOFILE 0x0001
115329f1 135#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
b9a281db 136#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
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137#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
138 raw picture data */
c64d476c 139#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
494bbf58 140#define AVFMT_NOTIMESTAMPS 0x0080 /* format doesnt need / has any timestamps */
e9b78eeb 141#define AVFMT_GENERIC_INDEX 0x0100 /* use generic index building code */
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142
143typedef struct AVOutputFormat {
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144 const char *name;
145 const char *long_name;
146 const char *mime_type;
147 const char *extensions; /* comma separated extensions */
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148 /* size of private data so that it can be allocated in the wrapper */
149 int priv_data_size;
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150 /* output support */
151 enum CodecID audio_codec; /* default audio codec */
152 enum CodecID video_codec; /* default video codec */
153 int (*write_header)(struct AVFormatContext *);
e928649b 154 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 155 int (*write_trailer)(struct AVFormatContext *);
c64d476c 156 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 157 int flags;
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158 /* currently only used to set pixel format if not YUV420P */
159 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
fe2d6fe2 160 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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161
162 /**
163 * list of supported codec_id-codec_tag pairs, ordered by "better choice first"
164 * the arrays are all CODEC_ID_NONE terminated
165 */
6c77805f 166 const struct AVCodecTag **codec_tag;
7caf0cc6 167
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168 /* private fields */
169 struct AVOutputFormat *next;
170} AVOutputFormat;
de6d9b64 171
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172typedef struct AVInputFormat {
173 const char *name;
174 const char *long_name;
175 /* size of private data so that it can be allocated in the wrapper */
176 int priv_data_size;
177 /* tell if a given file has a chance of being parsing by this format */
178 int (*read_probe)(AVProbeData *);
179 /* read the format header and initialize the AVFormatContext
de6d9b64 180 structure. Return 0 if OK. 'ap' if non NULL contains
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181 additionnal paramters. Only used in raw format right
182 now. 'av_new_stream' should be called to create new streams. */
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183 int (*read_header)(struct AVFormatContext *,
184 AVFormatParameters *ap);
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185 /* read one packet and put it in 'pkt'. pts and flags are also
186 set. 'av_new_stream' can be called only if the flag
da24c5e3 187 AVFMTCTX_NOHEADER is used. */
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188 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
189 /* close the stream. The AVFormatContext and AVStreams are not
190 freed by this function */
191 int (*read_close)(struct AVFormatContext *);
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192 /**
193 * seek to a given timestamp relative to the frames in
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194 * stream component stream_index
195 * @param stream_index must not be -1
115329f1 196 * @param flags selects which direction should be preferred if no exact
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197 * match is available
198 */
115329f1 199 int (*read_seek)(struct AVFormatContext *,
3ba1438d 200 int stream_index, int64_t timestamp, int flags);
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201 /**
202 * gets the next timestamp in AV_TIME_BASE units.
203 */
204 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
205 int64_t *pos, int64_t pos_limit);
da24c5e3 206 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 207 int flags;
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208 /* if extensions are defined, then no probe is done. You should
209 usually not use extension format guessing because it is not
210 reliable enough */
211 const char *extensions;
212 /* general purpose read only value that the format can use */
213 int value;
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214
215 /* start/resume playing - only meaningful if using a network based format
216 (RTSP) */
217 int (*read_play)(struct AVFormatContext *);
218
219 /* pause playing - only meaningful if using a network based format
220 (RTSP) */
221 int (*read_pause)(struct AVFormatContext *);
222
6c77805f 223 const struct AVCodecTag **codec_tag;
7caf0cc6 224
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225 /* private fields */
226 struct AVInputFormat *next;
227} AVInputFormat;
de6d9b64 228
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229typedef struct AVIndexEntry {
230 int64_t pos;
231 int64_t timestamp;
232#define AVINDEX_KEYFRAME 0x0001
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233 int flags:2;
234 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 235 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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236} AVIndexEntry;
237
de6d9b64 238typedef struct AVStream {
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239 int index; /* stream index in AVFormatContext */
240 int id; /* format specific stream id */
01f4895c 241 AVCodecContext *codec; /* codec context */
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242 /**
243 * real base frame rate of the stream.
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244 * this is the lowest framerate with which all timestamps can be
245 * represented accurately (its the least common multiple of all
246 * framerates in the stream), Note, this value is just a guess!
115329f1 247 * for example if the timebase is 1/90000 and all frames have either
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248 * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
249 */
250 AVRational r_frame_rate;
de6d9b64 251 void *priv_data;
b9a281db 252 /* internal data used in av_find_stream_info() */
115329f1 253 int64_t codec_info_duration;
fb2758c8 254 int codec_info_nb_frames;
da24c5e3 255 /* encoding: PTS generation when outputing stream */
1e51d801 256 AVFrac pts;
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257
258 /**
259 * this is the fundamental unit of time (in seconds) in terms
260 * of which frame timestamps are represented. for fixed-fps content,
261 * timebase should be 1/framerate and timestamp increments should be
262 * identically 1.
263 */
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264 AVRational time_base;
265 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
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266 /* ffmpeg.c private use */
267 int stream_copy; /* if TRUE, just copy stream */
f3356e9c 268 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
b4aea108 269 //FIXME move stuff to a flags field?
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270 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
271 * MN:dunno if thats the right place, for it */
115329f1 272 float quality;
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273 /* decoding: position of the first frame of the component, in
274 AV_TIME_BASE fractional seconds. */
115329f1 275 int64_t start_time;
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276 /* decoding: duration of the stream, in AV_TIME_BASE fractional
277 seconds. */
278 int64_t duration;
fb2758c8 279
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280 char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */
281
fb2758c8 282 /* av_read_frame() support */
7cbaa7ba 283 int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
fb2758c8 284 struct AVCodecParserContext *parser;
6ec87caa 285
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286 int64_t cur_dts;
287 int last_IP_duration;
77405fc8 288 int64_t last_IP_pts;
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289 /* av_seek_frame() support */
290 AVIndexEntry *index_entries; /* only used if the format does not
291 support seeking natively */
292 int nb_index_entries;
191e8ca7 293 unsigned int index_entries_allocated_size;
115329f1 294
b4b87d48 295 int64_t nb_frames; ///< number of frames in this stream if known or 0
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296
297#define MAX_REORDER_DELAY 4
298 int64_t pts_buffer[MAX_REORDER_DELAY+1];
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299} AVStream;
300
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301#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
302 (streams are added dynamically) */
303
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304#define MAX_STREAMS 20
305
306/* format I/O context */
307typedef struct AVFormatContext {
7fea94ce 308 const AVClass *av_class; /* set by av_alloc_format_context */
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309 /* can only be iformat or oformat, not both at the same time */
310 struct AVInputFormat *iformat;
311 struct AVOutputFormat *oformat;
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312 void *priv_data;
313 ByteIOContext pb;
db69c2e5 314 unsigned int nb_streams;
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315 AVStream *streams[MAX_STREAMS];
316 char filename[1024]; /* input or output filename */
317 /* stream info */
4568325a 318 int64_t timestamp;
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319 char title[512];
320 char author[512];
321 char copyright[512];
322 char comment[512];
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323 char album[512];
324 int year; /* ID3 year, 0 if none */
325 int track; /* track number, 0 if none */
326 char genre[32]; /* ID3 genre */
327
da24c5e3 328 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
916c80e9 329 /* private data for pts handling (do not modify directly) */
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330 /* This buffer is only needed when packets were already buffered but
331 not decoded, for example to get the codec parameters in mpeg
332 streams */
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333 struct AVPacketList *packet_buffer;
334
335 /* decoding: position of the first frame of the component, in
336 AV_TIME_BASE fractional seconds. NEVER set this value directly:
337 it is deduced from the AVStream values. */
115329f1 338 int64_t start_time;
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339 /* decoding: duration of the stream, in AV_TIME_BASE fractional
340 seconds. NEVER set this value directly: it is deduced from the
341 AVStream values. */
342 int64_t duration;
343 /* decoding: total file size. 0 if unknown */
344 int64_t file_size;
345 /* decoding: total stream bitrate in bit/s, 0 if not
346 available. Never set it directly if the file_size and the
347 duration are known as ffmpeg can compute it automatically. */
348 int bit_rate;
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349
350 /* av_read_frame() support */
351 AVStream *cur_st;
352 const uint8_t *cur_ptr;
353 int cur_len;
354 AVPacket cur_pkt;
355
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356 /* av_seek_frame() support */
357 int64_t data_offset; /* offset of the first packet */
358 int index_built;
115329f1 359
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360 int mux_rate;
361 int packet_size;
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362 int preload;
363 int max_delay;
8108551a 364
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365#define AVFMT_NOOUTPUTLOOP -1
366#define AVFMT_INFINITEOUTPUTLOOP 0
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367 /* number of times to loop output in formats that support it */
368 int loop_output;
115329f1 369
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370 int flags;
371#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
2c00106c 372#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
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373
374 int loop_input;
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375 /* decoding: size of data to probe; encoding unused */
376 unsigned int probesize;
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377
378 /**
379 * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info()
380 */
381 int max_analyze_duration;
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382} AVFormatContext;
383
384typedef struct AVPacketList {
385 AVPacket pkt;
386 struct AVPacketList *next;
387} AVPacketList;
388
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389extern AVInputFormat *first_iformat;
390extern AVOutputFormat *first_oformat;
de6d9b64 391
5b6d5596 392enum CodecID av_guess_image2_codec(const char *filename);
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
b9a281db 401/* utils.c */
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402void av_register_input_format(AVInputFormat *format);
403void av_register_output_format(AVOutputFormat *format);
115329f1 404AVOutputFormat *guess_stream_format(const char *short_name,
36ada60c 405 const char *filename, const char *mime_type);
115329f1 406AVOutputFormat *guess_format(const char *short_name,
b9a281db 407 const char *filename, const char *mime_type);
115329f1 408enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
5b6d5596 409 const char *filename, const char *mime_type, enum CodecType type);
de6d9b64 410
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411void av_hex_dump(FILE *f, uint8_t *buf, int size);
412void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 413
94988531 414void av_register_all(void);
de6d9b64 415
7caf0cc6 416/* codec tag <-> codec id */
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417enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
418unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
7caf0cc6 419
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420/* media file input */
421AVInputFormat *av_find_input_format(const char *short_name);
94988531 422AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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423int av_open_input_stream(AVFormatContext **ic_ptr,
424 ByteIOContext *pb, const char *filename,
da24c5e3 425 AVInputFormat *fmt, AVFormatParameters *ap);
115329f1 426int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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427 AVInputFormat *fmt,
428 int buf_size,
429 AVFormatParameters *ap);
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430/* no av_open for output, so applications will need this: */
431AVFormatContext *av_alloc_format_context(void);
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432
433#define AVERROR_UNKNOWN (-1) /* unknown error */
434#define AVERROR_IO (-2) /* i/o error */
435#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
436#define AVERROR_INVALIDDATA (-4) /* invalid data found */
437#define AVERROR_NOMEM (-5) /* not enough memory */
438#define AVERROR_NOFMT (-6) /* unknown format */
fb2758c8 439#define AVERROR_NOTSUPP (-7) /* operation not supported */
115329f1 440
b9a281db 441int av_find_stream_info(AVFormatContext *ic);
de6d9b64 442int av_read_packet(AVFormatContext *s, AVPacket *pkt);
fb2758c8 443int av_read_frame(AVFormatContext *s, AVPacket *pkt);
3ba1438d 444int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
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445int av_read_play(AVFormatContext *s);
446int av_read_pause(AVFormatContext *s);
de6d9b64 447void av_close_input_file(AVFormatContext *s);
b9a281db 448AVStream *av_new_stream(AVFormatContext *s, int id);
9ee91c2f 449void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 450 int pts_num, int pts_den);
de6d9b64 451
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452#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
453#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
27a5fe5f 454#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
3ba1438d 455
b754978a 456int av_find_default_stream_index(AVFormatContext *s);
dc56fc38 457int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
3e9245a9 458int av_add_index_entry(AVStream *st,
30a43f2d 459 int64_t pos, int64_t timestamp, int size, int distance, int flags);
3ba1438d 460int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
22ffac70 461void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
89ddd2a9 462int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
b754978a 463
b9a281db 464/* media file output */
290c5fa6 465int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
b9a281db 466int av_write_header(AVFormatContext *s);
e928649b 467int av_write_frame(AVFormatContext *s, AVPacket *pkt);
3c895fc0 468int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
f21c0b4c 469int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
e928649b 470
b9a281db 471int av_write_trailer(AVFormatContext *s);
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472
473void dump_format(AVFormatContext *ic,
115329f1 474 int index,
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475 const char *url,
476 int is_output);
477int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
445f1b83 478int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
0c1a9eda 479int64_t parse_date(const char *datestr, int duration);
de6d9b64 480
0c1a9eda 481int64_t av_gettime(void);
94988531 482
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483/* ffm specific for ffserver */
484#define FFM_PACKET_SIZE 4096
485offset_t ffm_read_write_index(int fd);
486void ffm_write_write_index(int fd, offset_t pos);
487void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
488
489int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
490
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491int av_get_frame_filename(char *buf, int buf_size,
492 const char *path, int number);
493int av_filename_number_test(const char *filename);
96baaa6a 494
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495/* grab specific */
496int video_grab_init(void);
497int audio_init(void);
96baaa6a 498
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499/* DV1394 */
500int dv1394_init(void);
f02be79d 501int dc1394_init(void);
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502
503#ifdef HAVE_AV_CONFIG_H
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504
505#include "os_support.h"
506
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507int strstart(const char *str, const char *val, const char **ptr);
508int stristart(const char *str, const char *val, const char **ptr);
509void pstrcpy(char *buf, int buf_size, const char *str);
510char *pstrcat(char *buf, int buf_size, const char *s);
fb025625 511
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512void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
513
e4e70d2e 514#ifdef __GNUC__
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515#define dynarray_add(tab, nb_ptr, elem)\
516do {\
517 typeof(tab) _tab = (tab);\
518 typeof(elem) _elem = (elem);\
519 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
520 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
521} while(0)
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522#else
523#define dynarray_add(tab, nb_ptr, elem)\
524do {\
525 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
526} while(0)
527#endif
39f472c3 528
f71869a4 529time_t mktimegm(struct tm *tm);
0c9fc6e1 530struct tm *brktimegm(time_t secs, struct tm *tm);
115329f1 531const char *small_strptime(const char *p, const char *fmt,
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532 struct tm *dt);
533
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534struct in_addr;
535int resolve_host(struct in_addr *sin_addr, const char *hostname);
536
537void url_split(char *proto, int proto_size,
6ba5cbc6 538 char *authorization, int authorization_size,
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539 char *hostname, int hostname_size,
540 int *port_ptr,
541 char *path, int path_size,
542 const char *url);
543
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544int match_ext(const char *filename, const char *extensions);
545
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546#endif /* HAVE_AV_CONFIG_H */
547
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548#ifdef __cplusplus
549}
550#endif
551
fb025625 552#endif /* AVFORMAT_H */
f3356e9c 553