internal.h
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1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
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
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_INTERNAL_H
22 #define AVFORMAT_INTERNAL_H
23 
24 #include <stdint.h>
25 #include "avformat.h"
26 
27 #define MAX_URL_SIZE 4096
28 
29 #ifdef DEBUG
30 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
31 #else
32 # define hex_dump_debug(class, buf, size)
33 #endif
34 
35 typedef struct AVCodecTag {
36  enum AVCodecID id;
37  unsigned int tag;
38 } AVCodecTag;
39 
40 typedef struct CodecMime{
41  char str[32];
42  enum AVCodecID id;
43 } CodecMime;
44 
45 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
46 
47 #ifdef __GNUC__
48 #define dynarray_add(tab, nb_ptr, elem)\
49 do {\
50  __typeof__(tab) _tab = (tab);\
51  __typeof__(elem) _elem = (elem);\
52  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
53  ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
54 } while(0)
55 #else
56 #define dynarray_add(tab, nb_ptr, elem)\
57 do {\
58  ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
59 } while(0)
60 #endif
61 
62 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
63 
64 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
65 
74 int ff_hex_to_data(uint8_t *data, const char *p);
75 
76 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
77 
83  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
84 
86 
87 #define NTP_OFFSET 2208988800ULL
88 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
89 
91 uint64_t ff_ntp_time(void);
92 
114 int ff_url_join(char *str, int size, const char *proto,
115  const char *authorization, const char *hostname,
116  int port, const char *fmt, ...) av_printf_format(7, 8);
117 
136 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
137  const char *dest_addr, const char *dest_type,
138  int port, int ttl, AVFormatContext *fmt);
139 
151 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
152  AVFormatContext *src);
153 
157 int ff_get_v_length(uint64_t val);
158 
162 void ff_put_v(AVIOContext *bc, uint64_t val);
163 
175 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
176 
177 #define SPACE_CHARS " \t\r\n"
178 
189 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
190  int key_len, char **dest, int *dest_len);
200 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
201  void *context);
202 
207 int ff_find_stream_index(AVFormatContext *s, int id);
208 
212 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
213  int64_t wanted_timestamp, int flags);
214 
218 int ff_add_index_entry(AVIndexEntry **index_entries,
219  int *nb_index_entries,
220  unsigned int *index_entries_allocated_size,
221  int64_t pos, int64_t timestamp, int size, int distance, int flags);
222 
235  int64_t start, int64_t end, const char *title);
236 
242 void ff_reduce_index(AVFormatContext *s, int stream_index);
243 
244 /*
245  * Convert a relative url into an absolute url, given a base url.
246  *
247  * @param buf the buffer where output absolute url is written
248  * @param size the size of buf
249  * @param base the base url, may be equal to buf.
250  * @param rel the new url, which is interpreted relative to base
251  */
252 void ff_make_absolute_url(char *buf, int size, const char *base,
253  const char *rel);
254 
255 enum AVCodecID ff_guess_image2_codec(const char *filename);
256 
260 int64_t ff_iso8601_to_unix_time(const char *datestr);
261 
269 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
270  int64_t target_ts, int flags);
271 
280 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
281 
288 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
289  int64_t target_ts, int64_t pos_min,
290  int64_t pos_max, int64_t pos_limit,
291  int64_t ts_min, int64_t ts_max,
292  int flags, int64_t *ts_ret,
293  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
294 
307 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
308  unsigned int pts_num, unsigned int pts_den);
309 
314 int ff_add_param_change(AVPacket *pkt, int32_t channels,
315  uint64_t channel_layout, int32_t sample_rate,
317 
323 
332 
349  AVPacket *pkt, int flush);
350 
354 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
355  AVCodecParserContext *pc, AVPacket *pkt);
356 
357 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux);
358 
359 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
360 
361 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
362 
376 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
377 
378 #endif /* AVFORMAT_INTERNAL_H */
int ff_framehash_write_header(AVFormatContext *s)
Set the timebase for each stream from the corresponding codec timebase and print it.
Definition: framehash.c:23
void ff_put_v(AVIOContext *bc, uint64_t val)
Put val using a variable number of bytes.
Definition: aviobuf.c:314
Bytestream IO Context.
Definition: avio.h:68
enum AVCodecID id
Definition: internal.h:36
int size
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:189
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2126
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:3283
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:50
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:2116
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
Internal version of av_index_search_timestamp.
Definition: utils.c:1401
int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
Get the number of samples of an audio frame.
Definition: utils.c:684
int ff_url_join(char *str, int size, const char *proto, const char *authorization, const char *hostname, int port, const char *fmt,...) av_printf_format(7
Assemble a URL string from components.
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:2815
Format I/O context.
Definition: avformat.h:828
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1321
struct CodecMime CodecMime
char str[32]
Definition: internal.h:41
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1295
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1334
uint8_t
const char data[16]
Definition: mxf.c:66
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave a packet per dts in an output media file.
Definition: mux.c:463
static int flags
Definition: log.c:42
uint32_t tag
Definition: movenc.c:802
enum AVCodecID id
Definition: internal.h:42
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:3038
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:95
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
Definition: utils.c:3549
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
Definition: utils.c:2839
void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem)
Definition: cutils.c:25
static float distance(float x, float y, int band)
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:3417
int64_t ff_iso8601_to_unix_time(const char *datestr)
Convert a date string in ISO8601 format to Unix timestamp.
Definition: utils.c:3496
int32_t
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:594
int void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
Append the media-specific SDP fragment for the media stream c to the buffer buff. ...
Definition: sdp.c:681
Stream structure.
Definition: avformat.h:622
static int width
Definition: utils.c:156
int ff_add_index_entry(AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Internal version of av_add_index_entry.
Definition: utils.c:1347
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:88
void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:706
main external API structure.
Definition: avcodec.h:1339
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
int64_t ff_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))
Perform a binary search using read_timestamp().
Definition: utils.c:1503
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
Select a PCM codec based on the given parameters.
Definition: utils.c:2140
rational number numerator/denominator
Definition: rational.h:43
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:3255
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, void *context)
Parse a string with comma-separated key=value pairs.
Definition: utils.c:3363
struct AVCodecTag AVCodecTag
unsigned int tag
Definition: internal.h:37
int height
Definition: gxfenc.c:72
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:304
Main libavformat public API header.
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
Definition: alsdec.c:1772
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src)
Write a packet to another muxer than the one the user originally intended.
Definition: utils.c:3345
unsigned bps
Definition: movenc.c:803
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, AVPacket *, AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:416
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:585
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:3234
This structure stores compressed data.
Definition: avcodec.h:898
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Definition: utils.c:3427
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:1442