FFmpeg
Macros | Functions
utils.c File Reference

various utility functions for use within FFmpeg More...

#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "libavcodec/internal.h"
#include "libavcodec/raw.h"
#include "libavcodec/bytestream.h"
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/pixdesc.h"
#include "metadata.h"
#include "id3v2.h"
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "riff.h"
#include "audiointerleave.h"
#include "url.h"
#include <stdarg.h>
#include <assert.h>

Go to the source code of this file.

Macros

#define  LICENSE_PREFIX   "libavformat license: "
 
#define  RELATIVE_TS_BASE   (INT64_MAX - (1LL<<48))
 
#define  MAKE_ACCESSORS(str, name, type, field)
 
#define  SANE_CHUNK_SIZE   (50000000)
 
#define  PROBE_BUF_MIN   2048
  size of probe buffer, for guessing file type from file contents
 
#define  PROBE_BUF_MAX   (1<<20)
 
#define  DURATION_MAX_READ_SIZE   250000LL
 
#define  DURATION_MAX_RETRY   4
 
#define  FAIL(errmsg)
 
#define  PRINT(...)   do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
 
#define  PRINT(...)   do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
 

Functions

unsigned  avformat_version (void)
  Return the LIBAVFORMAT_VERSION_INT constant.
 
const char *  avformat_configuration (void)
  Return the libavformat build-time configuration.
 
const char *  avformat_license (void)
  Return the libavformat license.
 
static int  is_relative (int64_t ts)
 
static int64_t  wrap_timestamp (AVStream *st, int64_t timestamp)
  Wrap a given time stamp, if there is an indication for an overflow.
 
int  ffio_limit (AVIOContext *s, int size)
 
static int  append_packet_chunked (AVIOContext *s, AVPacket *pkt, int size)
 
int  av_get_packet (AVIOContext *s, AVPacket *pkt, int size)
  Allocate and read the payload of a packet and initialize its fields with default values.
 
int  av_append_packet (AVIOContext *s, AVPacket *pkt, int size)
  Read data and append it to the current content of the AVPacket.
 
int  av_filename_number_test (const char *filename)
  Check whether filename actually is a numbered sequence generator.
 
AVInputFormat *  av_probe_input_format3 (AVProbeData *pd, int is_opened, int *score_ret)
  Guess the file format.
 
AVInputFormat *  av_probe_input_format2 (AVProbeData *pd, int is_opened, int *score_max)
  Guess the file format.
 
AVInputFormat *  av_probe_input_format (AVProbeData *pd, int is_opened)
  Guess the file format.
 
static int  set_codec_from_probe_data (AVFormatContext *s, AVStream *st, AVProbeData *pd)
 
int  av_demuxer_open (AVFormatContext *ic)
 
int  av_probe_input_buffer (AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
  Probe a bytestream to determine the input format.
 
static int  init_input (AVFormatContext *s, const char *filename, AVDictionary **options)
 
static AVPacket *  add_to_pktbuf (AVPacketList **packet_buffer, AVPacket *pkt, AVPacketList **plast_pktl)
 
int  avformat_queue_attached_pictures (AVFormatContext *s)
 
int  avformat_open_input (AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
  Open an input stream and read the header.
 
static void  force_codec_ids (AVFormatContext *s, AVStream *st)
 
static void  probe_codec (AVFormatContext *s, AVStream *st, const AVPacket *pkt)
 
int  ff_read_packet (AVFormatContext *s, AVPacket *pkt)
  Read a transport packet from a media file.
 
static int  determinable_frame_size (AVCodecContext *avctx)
 
int  ff_get_audio_frame_size (AVCodecContext *enc, int size, int mux)
  Get the number of samples of an audio frame.
 
void  ff_compute_frame_duration (int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
  Return the frame duration in seconds.
 
static int  is_intra_only (AVCodecContext *enc)
 
static int  has_decode_delay_been_guessed (AVStream *st)
 
static AVPacketList *  get_next_pkt (AVFormatContext *s, AVStream *st, AVPacketList *pktl)
 
static int  update_wrap_reference (AVFormatContext *s, AVStream *st, int stream_index)
 
static void  update_initial_timestamps (AVFormatContext *s, int stream_index, int64_t dts, int64_t pts, AVPacket *pkt)
 
static void  update_initial_durations (AVFormatContext *s, AVStream *st, int stream_index, int duration)
 
static void  compute_pkt_fields (AVFormatContext *s, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
 
static void  free_packet_buffer (AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
 
static int  parse_packet (AVFormatContext *s, AVPacket *pkt, int stream_index)
  Parse a packet, add all split parts to parse_queue.
 
static int  read_from_packet_buffer (AVPacketList **pkt_buffer, AVPacketList **pkt_buffer_end, AVPacket *pkt)
 
static int  read_frame_internal (AVFormatContext *s, AVPacket *pkt)
 
int  av_read_frame (AVFormatContext *s, AVPacket *pkt)
  Return the next frame of a stream.
 
static void  flush_packet_queue (AVFormatContext *s)
 
int  av_find_default_stream_index (AVFormatContext *s)
 
void  ff_read_frame_flush (AVFormatContext *s)
  Flush the frame reader.
 
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.
 
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 discarding entries if it grows too large.
 
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.
 
int  av_add_index_entry (AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
  Add an index entry into a sorted list.
 
int  ff_index_search_timestamp (const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
  Internal version of av_index_search_timestamp.
 
int  av_index_search_timestamp (AVStream *st, int64_t wanted_timestamp, int flags)
  Get the index for a specific timestamp.
 
static int64_t  ff_read_timestamp (AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
 
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().
 
int  ff_find_last_ts (AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
 
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().
 
static int  seek_frame_byte (AVFormatContext *s, int stream_index, int64_t pos, int flags)
 
static int  seek_frame_generic (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 
static int  seek_frame_internal (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 
int  av_seek_frame (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
  Seek to the keyframe at timestamp.
 
int  avformat_seek_file (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
  Seek to timestamp ts.
 
static int  has_duration (AVFormatContext *ic)
  Return TRUE if the stream has accurate duration in any stream.
 
static void  update_stream_timings (AVFormatContext *ic)
  Estimate the stream timings from the one of each components.
 
static void  fill_all_stream_timings (AVFormatContext *ic)
 
static void  estimate_timings_from_bit_rate (AVFormatContext *ic)
 
static void  estimate_timings_from_pts (AVFormatContext *ic, int64_t old_offset)
 
static void  estimate_timings (AVFormatContext *ic, int64_t old_offset)
 
static int  has_codec_parameters (AVStream *st, const char **errmsg_ptr)
 
static int  try_decode_frame (AVStream *st, AVPacket *avpkt, AVDictionary **options)
 
unsigned int  ff_codec_get_tag (const AVCodecTag *tags, enum AVCodecID id)
 
enum AVCodecID  ff_codec_get_id (const AVCodecTag *tags, unsigned int tag)
 
enum AVCodecID  ff_get_pcm_codec_id (int bps, int flt, int be, int sflags)
  Select a PCM codec based on the given parameters.
 
unsigned int  av_codec_get_tag (const AVCodecTag *const *tags, enum AVCodecID id)
 
int  av_codec_get_tag2 (const AVCodecTag *const *tags, enum AVCodecID id, unsigned int *tag)
 
enum AVCodecID  av_codec_get_id (const AVCodecTag *const *tags, unsigned int tag)
 
static void  compute_chapters_end (AVFormatContext *s)
 
static int  get_std_framerate (int i)
 
static int  tb_unreliable (AVCodecContext *c)
 
int  avformat_find_stream_info (AVFormatContext *ic, AVDictionary **options)
  Read packets of a media file to get stream information.
 
AVProgram *  av_find_program_from_stream (AVFormatContext *ic, AVProgram *last, int s)
  Find the programs which belong to a given stream.
 
int  av_find_best_stream (AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
  Find the "best" stream in the file.
 
int  av_read_play (AVFormatContext *s)
  Start playing a network-based stream (e.g.
 
int  av_read_pause (AVFormatContext *s)
  Pause a network-based stream (e.g.
 
void  ff_free_stream (AVFormatContext *s, AVStream *st)
 
void  avformat_free_context (AVFormatContext *s)
  Free an AVFormatContext and all its streams.
 
void  avformat_close_input (AVFormatContext **ps)
  Close an opened input AVFormatContext.
 
AVStream *  avformat_new_stream (AVFormatContext *s, const AVCodec *c)
  Add a new stream to a media file.
 
AVProgram *  av_new_program (AVFormatContext *ac, int id)
 
AVChapter *  avpriv_new_chapter (AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
  Add a new chapter.
 
void  ff_program_add_stream_index (AVFormatContext *ac, int progid, unsigned int idx)
 
static void  print_fps (double d, const char *postfix)
 
static void  dump_metadata (void *ctx, AVDictionary *m, const char *indent)
 
static void  dump_stream_format (AVFormatContext *ic, int i, int index, int is_output)
 
void  av_dump_format (AVFormatContext *ic, int index, const char *url, int is_output)
 
uint64_t  ff_ntp_time (void)
  Get the current time since NTP epoch in microseconds.
 
int  av_get_frame_filename (char *buf, int buf_size, const char *path, int number)
  Return in 'buf' the path with 'd' replaced by a number.
 
static void  hex_dump_internal (void *avcl, FILE *f, int level, const uint8_t *buf, int size)
 
void  av_hex_dump (FILE *f, const uint8_t *buf, int size)
  Send a nice hexadecimal dump of a buffer to the specified file stream.
 
void  av_hex_dump_log (void *avcl, int level, const uint8_t *buf, int size)
  Send a nice hexadecimal dump of a buffer to the log.
 
static void  pkt_dump_internal (void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
 
void  av_pkt_dump2 (FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
  Send a nice dump of a packet to the specified file stream.
 
void  av_pkt_dump_log2 (void *avcl, int level, AVPacket *pkt, int dump_payload, AVStream *st)
  Send a nice dump of a packet to the log.
 
void  av_url_split (char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url)
  Split a URL string into components.
 
char *  ff_data_to_hex (char *buff, const uint8_t *src, int s, int lowercase)
 
int  ff_hex_to_data (uint8_t *data, const char *p)
  Parse a string of hexadecimal strings.
 
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.
 
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.
 
int  ff_find_stream_index (AVFormatContext *s, int id)
  Find stream index based on format-specific stream ID.
 
int64_t  ff_iso8601_to_unix_time (const char *datestr)
  Convert a date string in ISO8601 format to Unix timestamp.
 
int  avformat_query_codec (AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
  Test if the given container can store a codec.
 
int  avformat_network_init (void)
  Do global initialization of network components.
 
int  avformat_network_deinit (void)
  Undo the initialization done by avformat_network_init.
 
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.
 
AVRational  av_guess_sample_aspect_ratio (AVFormatContext *format, AVStream *stream, AVFrame *frame)
  Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio.
 
AVRational  av_guess_frame_rate (AVFormatContext *format, AVStream *st, AVFrame *frame)
  Guess the frame rate, based on both the container and codec information.
 
int  avformat_match_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec)
  Check if the stream st contained in s is matched by the stream specifier spec.
 
void  ff_generate_avci_extradata (AVStream *st)
  Generate standard extradata for AVC-Intra based on width/height and field order.
 

Detailed Description

various utility functions for use within FFmpeg

Definition in file utils.c.

Macro Definition Documentation

#define LICENSE_PREFIX   "libavformat license: "
#define RELATIVE_TS_BASE   (INT64_MAX - (1LL<<48))

Definition at line 73 of file utils.c.

Referenced by av_read_frame(), avformat_find_stream_info(), avformat_new_stream(), ff_add_index_entry(), ff_read_frame_flush(), is_relative(), update_initial_durations(), and update_initial_timestamps().

#define MAKE_ACCESSORS (   str,
  name,
  type,
  field 
)
Value:
type av_##name##_get_##field(const str *s) { return s->field; } \
void av_##name##_set_##field(str *s, type v) { s->field = v; }

Definition at line 100 of file utils.c.

#define SANE_CHUNK_SIZE   (50000000)

Definition at line 107 of file utils.c.

Referenced by append_packet_chunked().

#define PROBE_BUF_MIN   2048

size of probe buffer, for guessing file type from file contents

Definition at line 316 of file utils.c.

Referenced by av_probe_input_buffer().

#define PROBE_BUF_MAX   (1<<20)

Definition at line 317 of file utils.c.

Referenced by av_probe_input_buffer().

#define DURATION_MAX_READ_SIZE   250000LL

Definition at line 2238 of file utils.c.

Referenced by estimate_timings_from_pts().

#define DURATION_MAX_RETRY   4

Definition at line 2239 of file utils.c.

Referenced by estimate_timings_from_pts().

#define FAIL (   errmsg )
Value:
do { \
if (errmsg_ptr) \
*errmsg_ptr = errmsg; \
return 0; \
} while (0)
#define PRINT (   ... )    do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
#define PRINT (   ... )    do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)

Function Documentation

static int is_relative ( int64_t  ts )
static

Definition at line 75 of file utils.c.

Referenced by av_read_frame(), avformat_find_stream_info(), compute_pkt_fields(), ff_add_index_entry(), and update_initial_timestamps().

static int64_t wrap_timestamp ( AVStream *  st,
int64_t  timestamp 
)
static

Wrap a given time stamp, if there is an indication for an overflow.

Parameters
st stream
timestamp the time stamp to wrap
Returns
resulting time stamp

Definition at line 86 of file utils.c.

Referenced by av_add_index_entry(), ff_read_packet(), ff_read_timestamp(), and update_initial_timestamps().

int ffio_limit ( AVIOContext *  s,
int  size 
)

Definition at line 109 of file utils.c.

Referenced by append_packet_chunked(), asf_read_stream_properties(), cin_read_packet(), ebml_parse_elem(), film_read_packet(), rm_assemble_video_frame(), roq_read_packet(), siff_read_packet(), and vmd_read_packet().

static int append_packet_chunked ( AVIOContext *  s,
AVPacket *  pkt,
int  size 
)
static

Definition at line 133 of file utils.c.

Referenced by av_append_packet(), and av_get_packet().

int av_get_packet ( AVIOContext *  s,
AVPacket *  pkt,
int  size 
)

Allocate and read the payload of a packet and initialize its fields with default values.

Parameters
pkt packet
size desired payload size
Returns
>0 (read size) if OK, AVERROR_xxx otherwise

Definition at line 176 of file utils.c.

Referenced by adp_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), apc_read_packet(), ape_tag_read_field(), asf_read_header(), asf_read_picture(), ast_read_packet(), av_append_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), daud_packet(), dfa_read_packet(), dxa_read_packet(), ea_read_packet(), ff_pcm_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_voc_get_packet(), film_read_packet(), flv_data_packet(), flv_read_packet(), fourxm_read_packet(), frm_read_packet(), g729_read_packet(), get_attachment(), gif_read_packet(), gsm_read_packet(), gxf_packet(), idcin_read_packet(), iff_read_packet(), ingenient_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_packet(), lvf_read_packet(), mmf_read_packet(), mov_read_covr(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), msnwc_tcp_read_packet(), mtv_read_packet(), mv_read_packet(), mxf_decrypt_triplet(), mxf_get_d10_aes3_packet(), mxf_read_packet(), mxf_read_packet_old(), nc_read_packet(), nsv_read_chunk(), nuv_packet(), oma_read_packet(), pmp_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), read_packet(), redspark_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), seq_read_packet(), siff_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), swf_read_packet(), thp_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vc1t_read_packet(), vid_read_packet(), vivo_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xwma_read_packet(), yop_read_packet(), and yuv4_read_packet().

int av_append_packet ( AVIOContext *  s,
AVPacket *  pkt,
int  size 
)

Read data and append it to the current content of the AVPacket.

If pkt->size is 0 this is identical to av_get_packet. Note that this uses av_grow_packet and thus involves a realloc which is inefficient. Thus this function should only be used when there is no reasonable way to know (an upper bound of) the final size.

Parameters
pkt packet
size amount of data to read
Returns
>0 (read size) if OK, AVERROR_xxx otherwise, previous data will not be lost even if an error occurs.

Definition at line 186 of file utils.c.

Referenced by dfa_read_packet(), ea_read_packet(), read_packet(), vivo_read_packet(), wc3_read_header(), and wc3_read_packet().

static int set_codec_from_probe_data ( AVFormatContext *  s,
AVStream *  st,
AVProbeData *  pd 
)
static

Definition at line 262 of file utils.c.

Referenced by probe_codec().

static int init_input ( AVFormatContext *  s,
const char *  filename,
AVDictionary **  options 
)
static

Definition at line 401 of file utils.c.

Referenced by avformat_open_input().

static AVPacket* add_to_pktbuf ( AVPacketList **  packet_buffer,
AVPacket *  pkt,
AVPacketList **  plast_pktl 
)
static

Definition at line 429 of file utils.c.

Referenced by av_read_frame(), avformat_find_stream_info(), avformat_queue_attached_pictures(), ff_read_packet(), and parse_packet().

static void force_codec_ids ( AVFormatContext *  s,
AVStream *  st 
)
static

Definition at line 558 of file utils.c.

Referenced by ff_read_packet(), and probe_codec().

static void probe_codec ( AVFormatContext *  s,
AVStream *  st,
const AVPacket *  pkt 
)
static

Definition at line 573 of file utils.c.

Referenced by ff_read_packet().

int ff_read_packet ( AVFormatContext *  s,
AVPacket *  pkt 
)

Read a transport packet from a media file.

Parameters
s media file handle
pkt is filled
Returns
0 if OK, AVERROR_xxx on error

Definition at line 618 of file utils.c.

Referenced by asfrtp_parse_packet(), estimate_timings_from_pts(), get_subtitle_pkt(), read_frame_internal(), read_gab2_sub(), and seek_subtitle().

static int determinable_frame_size ( AVCodecContext *  avctx )
static

Definition at line 703 of file utils.c.

Referenced by has_codec_parameters().

int ff_get_audio_frame_size ( AVCodecContext *  enc,
int  size,
int  mux 
)

Get the number of samples of an audio frame.

Return -1 on error.

Definition at line 717 of file utils.c.

Referenced by compute_pkt_fields2(), and ff_compute_frame_duration().

void ff_compute_frame_duration ( int *  pnum,
int *  pden,
AVStream *  st,
AVCodecParserContext *  pc,
AVPacket *  pkt 
)

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 746 of file utils.c.

Referenced by compute_pkt_fields(), and compute_pkt_fields2().

static int is_intra_only ( AVCodecContext *  enc )
static

Definition at line 789 of file utils.c.

Referenced by compute_pkt_fields().

static int has_decode_delay_been_guessed ( AVStream *  st )
static

Definition at line 805 of file utils.c.

Referenced by compute_pkt_fields(), try_decode_frame(), and update_initial_timestamps().

static AVPacketList* get_next_pkt ( AVFormatContext *  s,
AVStream *  st,
AVPacketList *  pktl 
)
static

Definition at line 823 of file utils.c.

Referenced by update_initial_durations(), and update_initial_timestamps().

static int update_wrap_reference ( AVFormatContext *  s,
AVStream *  st,
int  stream_index 
)
static

Definition at line 832 of file utils.c.

Referenced by update_initial_timestamps().

static void update_initial_timestamps ( AVFormatContext *  s,
int  stream_index,
int64_t  dts,
int64_t  pts,
AVPacket *  pkt 
)
static

Definition at line 891 of file utils.c.

Referenced by compute_pkt_fields().

static void update_initial_durations ( AVFormatContext *  s,
AVStream *  st,
int  stream_index,
int  duration 
)
static

Definition at line 948 of file utils.c.

Referenced by compute_pkt_fields().

static void compute_pkt_fields ( AVFormatContext *  s,
AVStream *  st,
AVCodecParserContext *  pc,
AVPacket *  pkt 
)
static

Definition at line 994 of file utils.c.

Referenced by parse_packet(), and read_frame_internal().

static void free_packet_buffer ( AVPacketList **  pkt_buf,
AVPacketList **  pkt_buf_end 
)
static

Definition at line 1144 of file utils.c.

Referenced by flush_packet_queue().

static int parse_packet ( AVFormatContext *  s,
AVPacket *  pkt,
int  stream_index 
)
static

Parse a packet, add all split parts to parse_queue.

Parameters
pkt packet to parse, NULL when flushing the parser at end of stream

Definition at line 1160 of file utils.c.

Referenced by read_frame_internal().

static int read_from_packet_buffer ( AVPacketList **  pkt_buffer,
AVPacketList **  pkt_buffer_end,
AVPacket *  pkt 
)
static

Definition at line 1268 of file utils.c.

Referenced by av_read_frame(), and read_frame_internal().

static int read_frame_internal ( AVFormatContext *  s,
AVPacket *  pkt 
)
static

Definition at line 1283 of file utils.c.

Referenced by av_read_frame(), and avformat_find_stream_info().

static void flush_packet_queue ( AVFormatContext *  s )
static

Definition at line 1487 of file utils.c.

Referenced by avformat_close_input(), estimate_timings_from_pts(), and ff_read_frame_flush().

void ff_read_frame_flush ( AVFormatContext *  s )

Flush the frame reader.

Definition at line 1522 of file utils.c.

Referenced by avformat_seek_file(), ff_restore_parser_state(), ff_seek_frame_binary(), mpegts_get_dts(), search_hi_lo_keyframes(), seek_frame_generic(), and seek_frame_internal().

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.

Stream ref_st unchanged, others set cur_dts in their native time base. Only needed for timestamp wrapping or if (dts not set and pts!=dts).

Parameters
timestamp new dts expressed in time_base of param ref_st
ref_st reference stream giving time_base of param timestamp

Definition at line 1549 of file utils.c.

Referenced by ff_seek_frame_binary(), idcin_read_seek(), matroska_read_seek(), mp3_seek(), mpc8_read_seek(), mxf_read_seek(), and seek_frame_generic().

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 discarding entries if it grows too large.

Definition at line 1562 of file utils.c.

Referenced by av_read_frame(), mpegps_read_pes_header(), mpegts_get_dts(), and read_frame_internal().

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 at line 1575 of file utils.c.

Referenced by av_add_index_entry(), and read_header().

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 at line 1636 of file utils.c.

Referenced by av_index_search_timestamp(), ff_add_index_entry(), mxf_read_seek(), and read_seek().

static int64_t ff_read_timestamp ( AVFormatContext *  s,
int  stream_index,
int64_t *  ppos,
int64_t  pos_limit,
int64_t(*)(struct AVFormatContext *, int, int64_t *, int64_t)  read_timestamp 
)
static

Definition at line 1677 of file utils.c.

Referenced by ff_find_last_ts(), and ff_gen_search().

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().

Parameters
target_ts target timestamp in the time base of the given stream
stream_index stream number

Definition at line 1686 of file utils.c.

Referenced by asf_read_seek(), ogg_read_seek(), rm_read_seek(), and seek_frame_internal().

int ff_find_last_ts ( AVFormatContext *  s,
int  stream_index,
int64_t *  ts,
int64_t *  pos,
int64_t(*)(struct AVFormatContext *, int, int64_t *, int64_t)  read_timestamp 
)

Definition at line 1748 of file utils.c.

Referenced by ff_gen_search(), and find_duration().

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(*)(struct AVFormatContext *, int, int64_t *, int64_t)  read_timestamp 
)

Perform a binary search using read_timestamp().

Parameters
target_ts target timestamp in the time base of the given stream
stream_index stream number

Definition at line 1783 of file utils.c.

Referenced by ff_seek_frame_binary(), and read_seek().

static int seek_frame_byte ( AVFormatContext *  s,
int  stream_index,
int64_t  pos,
int  flags 
)
static

Definition at line 1888 of file utils.c.

Referenced by seek_frame_internal().

static int seek_frame_generic ( AVFormatContext *  s,
int  stream_index,
int64_t  timestamp,
int  flags 
)
static

Definition at line 1904 of file utils.c.

Referenced by seek_frame_internal().

static int seek_frame_internal ( AVFormatContext *  s,
int  stream_index,
int64_t  timestamp,
int  flags 
)
static

Definition at line 1968 of file utils.c.

Referenced by av_seek_frame().

static int has_duration ( AVFormatContext *  ic )
static

Return TRUE if the stream has accurate duration in any stream.

Returns
TRUE if the stream has accurate duration for at least one component.

Definition at line 2095 of file utils.c.

Referenced by estimate_timings().

static void update_stream_timings ( AVFormatContext *  ic )
static

Estimate the stream timings from the one of each components.

Also computes the global bitrate if possible.

Definition at line 2115 of file utils.c.

Referenced by estimate_timings(), and fill_all_stream_timings().

static void fill_all_stream_timings ( AVFormatContext *  ic )
static

Definition at line 2184 of file utils.c.

Referenced by estimate_timings(), and estimate_timings_from_pts().

static void estimate_timings_from_bit_rate ( AVFormatContext *  ic )
static

Definition at line 2201 of file utils.c.

Referenced by estimate_timings().

static void estimate_timings_from_pts ( AVFormatContext *  ic,
int64_t  old_offset 
)
static

Definition at line 2242 of file utils.c.

Referenced by estimate_timings().

static void estimate_timings ( AVFormatContext *  ic,
int64_t  old_offset 
)
static

Definition at line 2319 of file utils.c.

Referenced by avformat_find_stream_info().

static int has_codec_parameters ( AVStream *  st,
const char **  errmsg_ptr 
)
static

Definition at line 2365 of file utils.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

static int try_decode_frame ( AVStream *  st,
AVPacket *  avpkt,
AVDictionary **  options 
)
static

Definition at line 2411 of file utils.c.

Referenced by avformat_find_stream_info().

unsigned int ff_codec_get_tag ( const AVCodecTag *  tags,
enum AVCodecID  id 
)

Definition at line 2493 of file utils.c.

Referenced by ast_write_header(), caf_write_header(), gxf_write_header(), ipod_get_codec_tag(), ircam_write_header(), mkv_write_codecprivate(), mkv_write_tracks(), mov_find_codec_tag(), mov_get_codec_tag(), mov_write_esds_tag(), mov_write_isml_manifest(), mp4_get_codec_tag(), smjpeg_write_header(), and swf_write_video().

enum AVCodecID ff_codec_get_id ( const AVCodecTag *  tags,
unsigned int  tag 
)

Definition at line 2503 of file utils.c.

Referenced by asf_read_stream_properties(), ast_read_header(), av_codec_get_id(), avi_read_header(), create_new_audio_stream(), decode_stream_header(), dshow_add_device(), dshow_cycle_formats(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_rm_read_mdpr_codecdata(), ff_voc_get_packet(), get_aiff_header(), get_codec_data(), ircam_read_header(), lvf_read_header(), lxf_read_header(), matroska_read_header(), nsv_parse_NSVs_header(), nut_read_header(), ogm_dshow_header(), ogm_header(), oma_read_header(), parse_media_type(), read_desc_chunk(), read_header(), rm_read_audio_stream_info(), rsd_read_header(), rso_read_header(), smjpeg_read_header(), and swf_read_packet().

enum AVCodecID ff_get_pcm_codec_id ( int  bps,
int  flt,
int  be,
int  sflags 
)

Select a PCM codec based on the given parameters.

Parameters
bps bits-per-sample
flt floating-point
be big-endian
sflags signed flags. each bit corresponds to one byte of bit depth. e.g. the 1st bit indicates if 8-bit should be signed or unsigned, the 2nd bit indicates if 16-bit should be signed or unsigned, etc... This is useful for formats such as WAVE where only 8-bit is unsigned and all other bit depths are signed.
Returns
a PCM codec id or AV_CODEC_ID_NONE

Definition at line 2517 of file utils.c.

Referenced by ff_mov_get_lpcm_codec_id(), get_codec_data(), nist_read_header(), and pvf_read_header().

unsigned int av_codec_get_tag ( const AVCodecTag *const *  tags,
enum AVCodecID  id 
)

Definition at line 2548 of file utils.c.

int av_codec_get_tag2 ( const AVCodecTag *const *  tags,
enum AVCodecID  id,
unsigned int *  tag 
)

Definition at line 2556 of file utils.c.

enum AVCodecID av_codec_get_id ( const AVCodecTag *const *  tags,
unsigned int  tag 
)

Definition at line 2573 of file utils.c.

static void compute_chapters_end ( AVFormatContext *  s )
static

Definition at line 2583 of file utils.c.

Referenced by avformat_find_stream_info().

static int get_std_framerate ( int  i )
static

Definition at line 2604 of file utils.c.

Referenced by avformat_find_stream_info().

static int tb_unreliable ( AVCodecContext *  c )
static

Definition at line 2617 of file utils.c.

Referenced by avformat_find_stream_info().

void ff_free_stream ( AVFormatContext *  s,
AVStream *  st 
)

Definition at line 3168 of file utils.c.

Referenced by avformat_free_context(), and ff_rm_read_mdpr_codecdata().

AVChapter* avpriv_new_chapter ( AVFormatContext *  s,
int  id,
AVRational  time_base,
int64_t  start,
int64_t  end,
const char *  title 
)

Add a new chapter.

Parameters
s media file handle
id unique ID for this chapter
start chapter start time in time_base units
end chapter end time in time_base units
title chapter title
Returns
AVChapter or NULL on error

Definition at line 3348 of file utils.c.

Referenced by asf_read_marker(), decode_info_header(), flac_read_header(), matroska_read_header(), mov_read_chapters(), mov_read_chpl(), ogm_chapter(), read_chapter(), and read_header().

void ff_program_add_stream_index ( AVFormatContext *  ac,
int  progid,
unsigned int  idx 
)

Definition at line 3372 of file utils.c.

Referenced by hls_read_header(), and pmt_cb().

static void print_fps ( double  d,
const char *  postfix 
)
static

Definition at line 3400 of file utils.c.

Referenced by dump_stream_format().

static void dump_metadata ( void *  ctx,
AVDictionary *  m,
const char *  indent 
)
static

Definition at line 3407 of file utils.c.

Referenced by av_dump_format(), and dump_stream_format().

static void dump_stream_format ( AVFormatContext *  ic,
int  i,
int  index,
int  is_output 
)
static

Definition at line 3434 of file utils.c.

Referenced by av_dump_format().

uint64_t ff_ntp_time ( void  )

Get the current time since NTP epoch in microseconds.

Definition at line 3578 of file utils.c.

Referenced by rtp_write_header(), and rtp_write_packet().

static void hex_dump_internal ( void *  avcl,
FILE *  f,
int  level,
const uint8_t *  buf,
int  size 
)
static

Definition at line 3638 of file utils.c.

Referenced by av_hex_dump(), and av_hex_dump_log().

static void pkt_dump_internal ( void *  avcl,
FILE *  f,
int  level,
AVPacket *  pkt,
int  dump_payload,
AVRational  time_base 
)
static

Definition at line 3677 of file utils.c.

Referenced by av_pkt_dump2(), and av_pkt_dump_log2().

char* ff_data_to_hex ( char *  buff,
const uint8_t *  src,
int  s,
int  lowercase 
)

Definition at line 3794 of file utils.c.

Referenced by do_llnw_auth(), ff_rdt_calc_response_and_checksum(), hex_log(), make_digest_auth(), open_input(), and param_write_hex().

int ff_hex_to_data ( uint8_t *  data,
const char *  p 
)

Parse a string of hexadecimal strings.

Any space between the hexadecimal digits is ignored.

Parameters
data if non-null, the parsed data is written to this pointer
p the string to parse
Returns
the number of bytes written (or to be written, if data is null)

Definition at line 3815 of file utils.c.

Referenced by parse_fmtp_config(), and parse_playlist().

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.

This will be used to interpret the stream's timestamps. If the new time base is invalid (numerator or denominator are non-positive), it leaves the stream unchanged.

Parameters
s stream
pts_wrap_bits number of bits effectively used by the pts (used for wrap control)
pts_num time base numerator
pts_den time base denominator

Definition at line 3851 of file utils.c.

Referenced by add_av_stream1(), adp_read_header(), adts_aac_read_header(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), amr_read_header(), ape_read_header(), aqt_read_header(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_sdp_line(), ass_read_header(), ast_read_header(), audio_read_header(), audio_write_header(), avformat_new_stream(), avi_read_header(), avi_write_header(), avr_read_header(), bfi_read_header(), bmv_read_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), create_audio_stream(), create_new_audio_stream(), create_stream(), dc1394_read_common(), decode_stream_header(), dfa_read_header(), dirac_header(), dshow_add_device(), dv_extract_audio_info(), dv_extract_video_info(), dxa_read_header(), ea_read_header(), epaf_read_header(), fbdev_read_header(), ff_framehash_write_header(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), ff_voc_get_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_header(), flac_read_header(), flv_write_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_packet_header(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), gxf_header(), gxf_write_header(), hls_read_header(), idcin_read_header(), iff_read_header(), ilbc_read_header(), img_read_header(), init_stream(), ipmovie_read_header(), ircam_read_header(), iss_read_header(), jacosub_read_header(), lavfi_read_header(), libquvi_read_header(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_read_trak(), mov_write_header(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_parse_structural_metadata(), mxf_write_header(), mxg_read_header(), nc_read_header(), new_stream(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_new_stream(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_dirac_header(), oma_read_header(), opus_header(), parse_audio_var(), parse_strk(), parse_video_var(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pulse_read_header(), pva_read_header(), pvf_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), rawvideo_read_header(), read_frame(), read_gab2_sub(), read_header(), read_header_gme(), read_sl_header(), realtext_read_header(), redspark_read_header(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rsd_read_header(), rso_read_header(), sami_read_header(), sbg_read_header(), seq_read_header(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smush_read_header(), sol_read_header(), sox_read_header(), speex_header(), srt_read_header(), srt_write_header(), str_read_packet(), subviewer1_read_header(), subviewer_read_header(), swf_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmv_read_header(), tta_read_header(), v4l2_read_header(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vorbis_header(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), webvtt_write_header(), write_header(), write_stream_data(), wsaud_read_header(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

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.

The value strings may be quoted and may contain escaped characters within quoted strings.

Parameters
str the string to parse
callback_get_buf function that returns where to store the unescaped value string.
context the opaque context pointer to pass to callback_get_buf

Definition at line 3870 of file utils.c.

Referenced by ff_http_auth_handle_header(), and parse_playlist().

int ff_find_stream_index ( AVFormatContext *  s,
int  id 
)

Find stream index based on format-specific stream ID.

Returns
stream index, or < 0 on error

Definition at line 3924 of file utils.c.

Referenced by get_sindex(), parse_chunks(), and pmt_cb().

int64_t ff_iso8601_to_unix_time ( const char *  datestr )

Convert a date string in ISO8601 format to Unix timestamp.

Definition at line 3934 of file utils.c.

Referenced by dv_init_mux(), gxf_write_umf_material_description(), mkv_write_header(), mov_write_header(), and mxf_write_header().

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.

Parameters set to 0 aren't included in the change.

Definition at line 3981 of file utils.c.

Referenced by flv_read_packet(), and load_ipmovie_packet().

void ff_generate_avci_extradata ( AVStream *  st )

Generate standard extradata for AVC-Intra based on width/height and field order.

Definition at line 4123 of file utils.c.

Referenced by mov_read_trak(), and mxf_parse_structural_metadata().

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