Libav
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 
51 };
52 
53 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
54 
55 #ifdef __GNUC__
56 #define dynarray_add(tab, nb_ptr, elem)\
57 do {\
58  __typeof__(tab) _tab = (tab);\
59  __typeof__(elem) _elem = (elem);\
60  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
61  ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
62 } while(0)
63 #else
64 #define dynarray_add(tab, nb_ptr, elem)\
65 do {\
66  ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
67 } while(0)
68 #endif
69 
70 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
71 
72 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
73 
82 int ff_hex_to_data(uint8_t *data, const char *p);
83 
84 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
85 
91  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
92 
94 
95 #define NTP_OFFSET 2208988800ULL
96 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
97 
99 uint64_t ff_ntp_time(void);
100 
119 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
120  const char *dest_addr, const char *dest_type,
121  int port, int ttl, AVFormatContext *fmt);
122 
134 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
135  AVFormatContext *src);
136 
140 int ff_get_v_length(uint64_t val);
141 
145 void ff_put_v(AVIOContext *bc, uint64_t val);
146 
158 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
159 
160 #define SPACE_CHARS " \t\r\n"
161 
172 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
173  int key_len, char **dest, int *dest_len);
183 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
184  void *context);
185 
190 int ff_find_stream_index(AVFormatContext *s, int id);
191 
195 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
196  int64_t wanted_timestamp, int flags);
197 
201 int ff_add_index_entry(AVIndexEntry **index_entries,
202  int *nb_index_entries,
203  unsigned int *index_entries_allocated_size,
204  int64_t pos, int64_t timestamp, int size, int distance, int flags);
205 
218  int64_t start, int64_t end, const char *title);
219 
225 void ff_reduce_index(AVFormatContext *s, int stream_index);
226 
227 enum AVCodecID ff_guess_image2_codec(const char *filename);
228 
232 int64_t ff_iso8601_to_unix_time(const char *datestr);
233 
241 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
242  int64_t target_ts, int flags);
243 
252 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
253 
260 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
261  int64_t target_ts, int64_t pos_min,
262  int64_t pos_max, int64_t pos_limit,
263  int64_t ts_min, int64_t ts_max,
264  int flags, int64_t *ts_ret,
265  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
266 
279 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
280  unsigned int pts_num, unsigned int pts_den);
281 
286 int ff_add_param_change(AVPacket *pkt, int32_t channels,
287  uint64_t channel_layout, int32_t sample_rate,
289 
295 
304 
321  AVPacket *pkt, int flush);
322 
326 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
327  AVCodecParserContext *pc, AVPacket *pkt);
328 
329 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux);
330 
331 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
332 
333 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
334 
348 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
349 
355 
363 static inline int ff_rename(const char *oldpath, const char *newpath)
364 {
365  if (rename(oldpath, newpath) == -1)
366  return AVERROR(errno);
367  return 0;
368 }
369 
370 #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:325
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:172
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1943
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:2829
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:1933
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:1189
int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
Get the number of samples of an audio frame.
Definition: utils.c:459
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:2601
Format I/O context.
Definition: avformat.h:922
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:1104
char str[32]
Definition: internal.h:41
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1078
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:1118
uint8_t
const char data[16]
Definition: mxf.c:70
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:455
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
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:2655
static int ff_rename(const char *oldpath, const char *newpath)
Wrap errno on rename() error.
Definition: internal.h:363
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:105
#define AVERROR(e)
Definition: error.h:43
int 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:391
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:2971
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
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_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:3013
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:2906
int64_t ff_iso8601_to_unix_time(const char *datestr)
Convert a date string in ISO8601 format to Unix timestamp.
Definition: utils.c:2915
int32_t
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:372
Stream structure.
Definition: avformat.h:699
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:1131
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:97
void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:480
main external API structure.
Definition: avcodec.h:1050
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:50
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:1295
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:1955
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:2801
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:2852
unsigned int tag
Definition: internal.h:37
int height
Definition: gxfenc.c:72
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:315
Main libavformat public API header.
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:694
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
Definition: alsdec.c:1797
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: mux.c:628
unsigned bps
Definition: movenc.c:845
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:614
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:2780
This structure stores compressed data.
Definition: avcodec.h:950
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:1228