FFmpeg
Data Structures | Macros | Typedefs | Enumerations | Functions
internal.h File Reference
#include <stdint.h>
#include "libavcodec/avcodec.h"
#include "libavcodec/bsf.h"
#include "avformat.h"
#include "os_support.h"

Go to the source code of this file.

Data Structures

struct  AVCodecTag
 
struct  CodecMime
 
struct  FFFrac
 The exact value of the fractional number is: 'val + num / den'. More...
 
struct  FFFormatContext
 
struct  FFStream
 

Macros

#define MAX_URL_SIZE   4096
 
#define PROBE_BUF_MIN   2048
 size of probe buffer, for guessing file type from file contents More...
 
#define PROBE_BUF_MAX   (1 << 20)
 
#define hex_dump_debug(class, buf, size)   do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
 
#define FF_FMT_INIT_CLEANUP   (1 << 0)
 For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_header() failure. More...
 
#define RAW_PACKET_BUFFER_SIZE   2500000
 Remaining size available for raw_packet_buffer, in bytes. More...
 
#define MAX_STD_TIMEBASES   (30*12+30+3+6)
 
#define MAX_REORDER_DELAY   16
 
#define dynarray_add(tab, nb_ptr, elem)
 
#define RELATIVE_TS_BASE   (INT64_MAX - (1LL << 48))
 
#define NTP_OFFSET   2208988800ULL
 
#define NTP_OFFSET_US   (NTP_OFFSET * 1000000ULL)
 
#define SPACE_CHARS   " \t\r\n"
 
#define FFERROR_REDO   FFERRTAG('R','E','D','O')
 Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data). More...
 
#define CONTAINS_PAL   2
 

Typedefs

typedef 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. More...
 

Enumerations

enum  AVWriteUncodedFrameFlags { AV_WRITE_UNCODED_FRAME_QUERY = 0x0001 }
 Flags for AVFormatContext.write_uncoded_frame() More...
 

Functions

static av_always_inline FFFormatContextffformatcontext (AVFormatContext *s)
 
static av_always_inline FFStreamffstream (AVStream *st)
 
static const av_always_inline FFStreamcffstream (const AVStream *st)
 
void avpriv_stream_set_need_parsing (AVStream *st, enum AVStreamParseType type)
 
static av_always_inline int is_relative (int64_t ts)
 
int64_t ff_wrap_timestamp (const AVStream *st, int64_t timestamp)
 Wrap a given time stamp, if there is an indication for an overflow. More...
 
void ff_flush_packet_queue (AVFormatContext *s)
 
int ff_mkdir_p (const char *path)
 Automatically create sub-directories. More...
 
char * ff_data_to_hex (char *buf, const uint8_t *src, int size, int lowercase)
 
int ff_hex_to_data (uint8_t *data, const char *p)
 Parse a string of hexadecimal strings. More...
 
int ff_interleave_add_packet (AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
 Add packet to an AVFormatContext's packet_buffer list, determining its interleaved position using compare() function argument. More...
 
void ff_read_frame_flush (AVFormatContext *s)
 Flush the frame reader. More...
 
uint64_t ff_ntp_time (void)
 Get the current time since NTP epoch in microseconds. More...
 
uint64_t ff_get_formatted_ntp_time (uint64_t ntp_time_us)
 Get the NTP time stamp formatted as per the RFC-5905. More...
 
uint64_t ff_parse_ntp_time (uint64_t ntp_ts)
 Parse the NTP time in micro seconds (since NTP epoch). More...
 
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. More...
 
int ff_write_chained (AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
 Write a packet to another muxer than the one the user originally intended. More...
 
int ff_get_line (AVIOContext *s, char *buf, int maxlen)
 Read a whole line of text from AVIOContext. More...
 
int ff_get_chomp_line (AVIOContext *s, char *buf, int maxlen)
 Same as ff_get_line but strip the white-space characters in the text tail. More...
 
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. More...
 
int ff_find_stream_index (AVFormatContext *s, int id)
 Find stream index based on format-specific stream ID. More...
 
int ff_index_search_timestamp (const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
 Internal version of av_index_search_timestamp. More...
 
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. More...
 
void ff_configure_buffers_for_index (AVFormatContext *s, int64_t time_tolerance)
 
AVChapteravpriv_new_chapter (AVFormatContext *s, int64_t id, AVRational time_base, int64_t start, int64_t end, const char *title)
 Add a new chapter. More...
 
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. More...
 
enum AVCodecID ff_guess_image2_codec (const char *filename)
 
const AVCodecff_find_decoder (AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
 
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(). More...
 
void avpriv_update_cur_dts (AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
 Update cur_dts of all streams based on the given timestamp and AVStream. More...
 
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(). More...
 
void avpriv_set_pts_info (AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
 Set the time base and wrapping info for a given stream. More...
 
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. More...
 
int ff_framehash_write_header (AVFormatContext *s)
 Set the timebase for each stream from the corresponding codec timebase and print it. More...
 
int ff_read_packet (AVFormatContext *s, AVPacket *pkt)
 Read a transport packet from a media file. More...
 
int ff_add_attached_pic (AVFormatContext *s, AVStream *st, AVIOContext *pb, AVBufferRef **buf, int size)
 Add an attached pic to an AVStream. More...
 
int ff_interleave_packet_per_dts (AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
 Interleave an AVPacket per dts so it can be muxed. More...
 
void ff_free_stream (AVFormatContext *s, AVStream *st)
 
unsigned int ff_codec_get_tag (const AVCodecTag *tags, enum AVCodecID id)
 
enum AVCodecID ff_codec_get_id (const AVCodecTag *tags, unsigned int tag)
 
int ff_is_intra_only (enum AVCodecID id)
 
enum AVCodecID ff_get_pcm_codec_id (int bps, int flt, int be, int sflags)
 Select a PCM codec based on the given parameters. More...
 
AVRational ff_choose_timebase (AVFormatContext *s, AVStream *st, int min_precision)
 Chooses a timebase for muxing the specified stream. More...
 
enum AVChromaLocation ff_choose_chroma_location (AVFormatContext *s, AVStream *st)
 Chooses a timebase for muxing the specified stream. More...
 
int ff_generate_avci_extradata (AVStream *st)
 Generate standard extradata for AVC-Intra based on width/height and field order. More...
 
int ff_stream_add_bitstream_filter (AVStream *st, const char *name, const char *args)
 Add a bitstream filter to a stream. More...
 
int ff_stream_encode_params_copy (AVStream *dst, const AVStream *src)
 Copy encoding parameters from source to destination stream. More...
 
int ff_rename (const char *url_src, const char *url_dst, void *logctx)
 Wrap ffurl_move() and log if error happens. More...
 
int ff_alloc_extradata (AVCodecParameters *par, int size)
 Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0. More...
 
int ff_get_extradata (AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
 Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and fill it from pb. More...
 
int ff_rfps_add_frame (AVFormatContext *ic, AVStream *st, int64_t dts)
 add frame for rfps calculation. More...
 
void ff_rfps_calculate (AVFormatContext *ic)
 
int ff_copy_whiteblacklists (AVFormatContext *dst, const AVFormatContext *src)
 Copies the whilelists from one context to the other. More...
 
int ff_format_output_open (AVFormatContext *s, const char *url, AVDictionary **options)
 Utility function to open IO stream of output format. More...
 
void ff_format_io_close (AVFormatContext *s, AVIOContext **pb)
 
int ff_is_http_proto (const char *filename)
 Utility function to check if the file uses http or https protocol. More...
 
int ff_parse_creation_time_metadata (AVFormatContext *s, int64_t *timestamp, int return_seconds)
 Parse creation_time in AVFormatContext metadata if exists and warn if the parsing fails. More...
 
int ff_standardize_creation_time (AVFormatContext *s)
 Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string. More...
 
int ff_reshuffle_raw_rgb (AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride)
 Reshuffles the lines to use the user specified stride. More...
 
int ff_get_packet_palette (AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
 Retrieves the palette from a packet, either from side data, or appended to the video data in the packet itself (raw video only). More...
 
int ff_bprint_to_codecpar_extradata (AVCodecParameters *par, struct AVBPrint *buf)
 Finalize buf into extradata and set its size appropriately. More...
 
const AVPacketff_interleaved_peek (AVFormatContext *s, int stream)
 Find the next packet in the interleaving queue for the given stream. More...
 
int ff_get_muxer_ts_offset (AVFormatContext *s, int stream_index, int64_t *offset)
 
int ff_lock_avformat (void)
 
int ff_unlock_avformat (void)
 
void ff_format_set_url (AVFormatContext *s, char *url)
 Set AVFormatContext url field to the provided pointer. More...
 
void avpriv_register_devices (const AVOutputFormat *const o[], const AVInputFormat *const i[])
 

Macro Definition Documentation

◆ MAX_URL_SIZE

#define MAX_URL_SIZE   4096

Definition at line 32 of file internal.h.

◆ PROBE_BUF_MIN

#define PROBE_BUF_MIN   2048

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

Definition at line 35 of file internal.h.

◆ PROBE_BUF_MAX

#define PROBE_BUF_MAX   (1 << 20)

Definition at line 36 of file internal.h.

◆ hex_dump_debug

#define hex_dump_debug (   class,
  buf,
  size 
)    do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)

Definition at line 41 of file internal.h.

◆ FF_FMT_INIT_CLEANUP

#define FF_FMT_INIT_CLEANUP   (1 << 0)

For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_header() failure.

Definition at line 48 of file internal.h.

◆ RAW_PACKET_BUFFER_SIZE

#define RAW_PACKET_BUFFER_SIZE   2500000

Remaining size available for raw_packet_buffer, in bytes.

Definition at line 132 of file internal.h.

◆ MAX_STD_TIMEBASES

#define MAX_STD_TIMEBASES   (30*12+30+3+6)

Definition at line 241 of file internal.h.

◆ MAX_REORDER_DELAY

#define MAX_REORDER_DELAY   16

Definition at line 357 of file internal.h.

◆ dynarray_add

#define dynarray_add (   tab,
  nb_ptr,
  elem 
)
Value:
do {\
__typeof__(tab) _tab = (tab);\
__typeof__(elem) _elem = (elem);\
(void)sizeof(**_tab == _elem); /* check that types are compatible */\
av_dynarray_add(_tab, nb_ptr, _elem);\
} while(0)

Definition at line 442 of file internal.h.

◆ RELATIVE_TS_BASE

#define RELATIVE_TS_BASE   (INT64_MAX - (1LL << 48))

Definition at line 456 of file internal.h.

◆ NTP_OFFSET

#define NTP_OFFSET   2208988800ULL

Definition at line 504 of file internal.h.

◆ NTP_OFFSET_US

#define NTP_OFFSET_US   (NTP_OFFSET * 1000000ULL)

Definition at line 505 of file internal.h.

◆ SPACE_CHARS

#define SPACE_CHARS   " \t\r\n"

Definition at line 587 of file internal.h.

◆ FFERROR_REDO

#define FFERROR_REDO   FFERRTAG('R','E','D','O')

Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data).

The framework will re-call the demuxer.

Definition at line 881 of file internal.h.

◆ CONTAINS_PAL

#define CONTAINS_PAL   2

Definition at line 927 of file internal.h.

Typedef Documentation

◆ ff_parse_key_val_cb

typedef 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.

Parameters
keya pointer to the key
key_lenthe number of bytes that belong to the key, including the '=' char
destreturn the destination pointer for the value in *dest, may be null to ignore the value
dest_lenthe length of the *dest buffer

Definition at line 599 of file internal.h.

Enumeration Type Documentation

◆ AVWriteUncodedFrameFlags

Flags for AVFormatContext.write_uncoded_frame()

Enumerator
AV_WRITE_UNCODED_FRAME_QUERY 

Query whether the feature is possible on this stream.

The frame argument is ignored.

Definition at line 862 of file internal.h.

Function Documentation

◆ ffformatcontext()

static av_always_inline FFFormatContext* ffformatcontext ( AVFormatContext s)
static

Definition at line 186 of file internal.h.

Referenced by amv_init(), asf_build_simple_index(), asf_read_header(), asf_read_pts(), asf_read_seek(), av_format_inject_global_side_data(), av_interleaved_write_frame(), av_read_frame(), av_write_frame(), av_write_trailer(), avformat_find_stream_info(), avformat_free_context(), avformat_init_output(), avformat_new_stream(), avformat_open_input(), avformat_queue_attached_pictures(), avformat_write_header(), avi_write_header(), avpriv_new_chapter(), codec2_read_header(), compute_pkt_fields(), deinit_muxer(), dsf_read_packet(), dv_frame_offset(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_flush_packet_queue(), ff_gen_search(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_interleaved_peek(), ff_pcm_read_seek(), ff_read_frame_flush(), ff_read_packet(), flac_queue_flush(), flac_read_timestamp(), fsb_read_header(), get_next_pkt(), init_muxer(), ipmovie_read_header(), mkv_init(), mkv_write_track(), mp3_queue_flush(), mp3_read_header(), mp3_seek(), mpegts_read_header(), mtv_read_packet(), mxf_interleave_get_packet(), nut_read_header(), ogg_get_length(), ogg_packet(), ogg_reset(), parse_packet(), probe_codec(), r3d_read_header(), read_frame_internal(), read_header(), seek_frame_byte(), seek_frame_generic(), ser_read_packet(), smacker_read_seek(), tee_write_packet(), tta_queue_flush(), update_initial_durations(), update_initial_timestamps(), vqf_read_seek(), webm_chunk_init(), webp_init(), write_muxed_file(), write_packet(), write_uncoded_frame_internal(), yop_read_seek(), yuv4_read_header(), yuv4_read_packet(), and yuv4_read_seek().

◆ ffstream()

static av_always_inline FFStream* ffstream ( AVStream st)
static

Definition at line 429 of file internal.h.

Referenced by aa_read_header(), acm_read_header(), add_dstream(), add_index_entry(), add_keyframes_index(), adts_aac_read_header(), amr_read_header(), ape_read_seek(), asf_read_seek(), asf_read_stream_properties(), asfrtp_parse_sdp_line(), av1_read_header(), av_add_index_entry(), av_find_best_stream(), av_format_inject_global_side_data(), av_guess_frame_rate(), av_index_search_timestamp(), av_write_trailer(), avformat_find_stream_info(), avformat_index_get_entry(), avformat_index_get_entry_from_timestamp(), avformat_transfer_internal_stream_timing_info(), avi_read_header(), avi_read_idx1(), avi_read_packet(), avi_read_seek(), avi_sync(), avpriv_set_pts_info(), avpriv_stream_set_need_parsing(), avpriv_update_cur_dts(), calculate_bitrate(), check_stream_max_drift(), cine_read_packet(), clean_index(), clear_index_entries(), compute_frame_duration(), compute_pkt_fields(), concat_read_packet(), create_new_audio_stream(), dash_check_bitstream(), decode_frame(), dhav_read_seek(), dtshd_read_header(), estimate_timings_from_pts(), extract_extradata(), extract_extradata_init(), ff_configure_buffers_for_index(), ff_get_muxer_ts_offset(), ff_img_read_header(), ff_img_read_packet(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_parse_mpeg2_descriptor(), ff_pcm_read_seek(), ff_raw_audio_read_header(), ff_raw_video_read_header(), ff_read_frame_flush(), ff_read_packet(), ff_reduce_index(), ff_rfps_add_frame(), ff_rfps_calculate(), ff_rm_read_mdpr_codecdata(), ff_seek_frame_binary(), ff_stream_add_bitstream_filter(), fifo_thread_write_header(), film_read_header(), film_read_seek(), find_prev_closest_index(), fix_index_entry_timestamps(), flac_header(), flac_read_header(), flac_read_timestamp(), flac_seek(), flv_get_extradata(), flv_set_audio_codec(), flv_set_video_codec(), free_stream(), get_codec_data(), get_sindex(), guess_ni_flag(), gxf_seek(), has_decode_delay_been_guessed(), hds_write_packet(), ifv_read_packet(), img_read_seek(), init_muxer(), init_pts(), init_video_stream(), ipu_read_header(), ism_write_packet(), lmlm4_read_header(), loas_read_header(), lxf_read_header(), m4sl_cb(), mov_build_index(), mov_estimate_video_delay(), mov_finalize_stsd_codec(), mov_find_next_sample(), mov_fix_index(), mov_get_skip_samples(), mov_parse_stsd_audio(), mov_read_ares(), mov_read_chapters(), mov_read_header(), mov_read_packet(), mov_read_rtmd_track(), mov_read_seek(), mov_read_stss(), mov_read_timecode_track(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), mp3_parse_info_tag(), mp3_read_header(), mp3_seek(), mpc8_read_seek(), mpc_read_seek(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_set_stream_info(), msf_read_header(), mtv_read_header(), mv_read_packet(), mxf_interleave_get_packet(), mxf_parse_structural_metadata(), mxf_read_packet(), nc_read_header(), new_stream(), ni_prepare_read(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_seek(), nut_write_packet(), ogm_header(), oma_read_header(), parse_packet(), prepare_input_packet(), probe_codec(), pva_read_header(), rdt_parse_sdp_line(), read_frame_internal(), read_header(), read_packet(), read_seek(), reset_index_position(), rl2_read_packet(), rl2_read_seek(), rm_read_audio_stream_info(), rpl_read_packet(), s337m_read_packet(), sbg_read_header(), sbg_read_packet(), sbg_read_seek2(), scan_file(), sdr2_read_header(), seek_frame_generic(), seg_check_bitstream(), select_from_pts_buffer(), set_codec_from_probe_data(), set_stream_info_from_input_stream(), swf_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_header(), try_decode_frame(), tta_read_packet(), tta_read_seek(), ty_read_header(), update_dts_from_pts(), update_initial_durations(), update_initial_timestamps(), update_stream_avctx(), update_wrap_reference(), voc_read_seek(), vp8_header(), vqf_read_seek(), write_packet(), write_packets_common(), write_packets_from_bsfs(), xvag_read_header(), and xwma_read_header().

◆ cffstream()

static const av_always_inline FFStream* cffstream ( const AVStream st)
static

◆ avpriv_stream_set_need_parsing()

void avpriv_stream_set_need_parsing ( AVStream st,
enum AVStreamParseType  type 
)

Definition at line 99 of file utils.c.

Referenced by v4l2_read_header().

◆ is_relative()

static av_always_inline int is_relative ( int64_t  ts)
static

◆ ff_wrap_timestamp()

int64_t ff_wrap_timestamp ( const AVStream st,
int64_t  timestamp 
)

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

Parameters
ststream
timestampthe time stamp to wrap
Returns
resulting time stamp

Definition at line 63 of file demux.c.

Referenced by av_add_index_entry(), and read_timestamp().

◆ ff_flush_packet_queue()

void ff_flush_packet_queue ( AVFormatContext s)

Definition at line 299 of file utils.c.

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

◆ ff_mkdir_p()

int ff_mkdir_p ( const char *  path)

Automatically create sub-directories.

Parameters
pathwill create sub-directories by path
Returns
0, or < 0 on error

Definition at line 1064 of file utils.c.

Referenced by format_name(), and hls_start().

◆ ff_data_to_hex()

char* ff_data_to_hex ( char *  buf,
const uint8_t *  src,
int  size,
int  lowercase 
)

◆ ff_hex_to_data()

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

Definition at line 1118 of file utils.c.

Referenced by concat_parse_script(), parse_fmtp_config(), and parse_playlist().

◆ ff_interleave_add_packet()

int ff_interleave_add_packet ( AVFormatContext s,
AVPacket pkt,
int(*)(AVFormatContext *, const AVPacket *, const AVPacket *)  compare 
)

Add packet to an AVFormatContext's packet_buffer list, determining its interleaved position using compare() function argument.

Returns
0 on success, < 0 on error. pkt will always be blank on return.

Definition at line 802 of file mux.c.

Referenced by ff_interleave_packet_per_dts(), gxf_interleave_packet(), and mxf_interleave().

◆ ff_read_frame_flush()

void ff_read_frame_flush ( AVFormatContext s)

◆ ff_ntp_time()

uint64_t ff_ntp_time ( void  )

Get the current time since NTP epoch in microseconds.

Definition at line 902 of file utils.c.

Referenced by mov_write_prft_tag(), rtp_write_header(), rtp_write_packet(), and rtp_write_trailer().

◆ ff_get_formatted_ntp_time()

uint64_t ff_get_formatted_ntp_time ( uint64_t  ntp_time_us)

Get the NTP time stamp formatted as per the RFC-5905.

Parameters
ntp_timeNTP time in micro seconds (since NTP epoch)
Returns
the formatted NTP time stamp

Definition at line 907 of file utils.c.

Referenced by mov_write_prft_tag().

◆ ff_parse_ntp_time()

uint64_t ff_parse_ntp_time ( uint64_t  ntp_ts)

Parse the NTP time in micro seconds (since NTP epoch).

Parameters
ntp_tsNTP time stamp formatted as per the RFC-5905.
Returns
the time in micro seconds (since NTP epoch)

Definition at line 929 of file utils.c.

Referenced by rtp_set_prft().

◆ ff_sdp_write_media()

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.

Note, the buffer needs to be initialized, since it is appended to existing content.

Parameters
buffthe buffer to append the SDP fragment to
sizethe size of the buff buffer
stthe AVStream of the media to describe
idxthe global stream index
dest_addrthe destination address of the media stream, may be NULL
dest_typethe destination address type, may be NULL
portthe destination port of the media stream, 0 if unknown
ttlthe time to live of the stream, 0 if not multicast
fmtthe AVFormatContext, which might contain options modifying the generated SDP

Definition at line 833 of file sdp.c.

Referenced by mov_write_udta_sdp().

◆ ff_write_chained()

int ff_write_chained ( AVFormatContext dst,
int  dst_stream,
AVPacket pkt,
AVFormatContext src,
int  interleave 
)

Write a packet to another muxer than the one the user originally intended.

Useful when chaining muxers, where one muxer internally writes a received packet to another muxer.

Parameters
dstthe muxer to write the packet to
dst_streamthe stream index within dst to write the packet to
pktthe packet to be written. It will be returned blank when av_interleaved_write_frame() is used, unchanged otherwise.
srcthe muxer the packet originally was intended for
interleave0->use av_write_frame, 1->av_interleaved_write_frame
Returns
the value av_write_frame returned

Definition at line 1307 of file mux.c.

Referenced by dash_write_packet(), ff_mov_add_hinted_packet(), hds_write_packet(), hls_write_packet(), ism_write_packet(), rtsp_write_packet(), sap_write_packet(), and seg_write_packet().

◆ ff_get_line()

int ff_get_line ( AVIOContext s,
char *  buf,
int  maxlen 
)

Read a whole line of text from AVIOContext.

Stop reading after reaching either a \n, a \0 or EOF. The returned string is always \0-terminated, and may be truncated if the buffer is too small.

Parameters
sthe read-only AVIOContext
bufbuffer to store the read line
maxlensize of the buffer
Returns
the length of the string written in the buffer, not including the final \0

Definition at line 781 of file aviobuf.c.

Referenced by aqt_read_header(), ff_get_chomp_line(), get_line(), hls_encryption_start(), jacosub_read_header(), microdvd_read_header(), mpl2_read_header(), mpsub_read_header(), nist_read_header(), pjs_read_header(), pvf_read_header(), stl_read_header(), subviewer1_read_header(), subviewer_read_header(), and vplayer_read_header().

◆ ff_get_chomp_line()

int ff_get_chomp_line ( AVIOContext s,
char *  buf,
int  maxlen 
)

Same as ff_get_line but strip the white-space characters in the text tail.

Parameters
sthe read-only AVIOContext
bufbuffer to store the read line
maxlensize of the buffer
Returns
the length of the string written in the buffer

Definition at line 798 of file aviobuf.c.

Referenced by parse_playlist().

◆ ff_parse_key_value()

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
strthe string to parse
callback_get_buffunction that returns where to store the unescaped value string.
contextthe opaque context pointer to pass to callback_get_buf

Definition at line 1172 of file utils.c.

Referenced by ff_http_auth_handle_header(), and parse_playlist().

◆ ff_find_stream_index()

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 1226 of file utils.c.

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

◆ ff_index_search_timestamp()

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 127 of file seek.c.

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

◆ ff_add_index_entry()

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 59 of file seek.c.

Referenced by av_add_index_entry(), read_header(), and scan_file().

◆ ff_configure_buffers_for_index()

void ff_configure_buffers_for_index ( AVFormatContext s,
int64_t  time_tolerance 
)

Definition at line 170 of file seek.c.

Referenced by mov_read_header().

◆ avpriv_new_chapter()

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

Add a new chapter.

Parameters
smedia file handle
idunique ID for this chapter
startchapter start time in time_base units
endchapter end time in time_base units
titlechapter title
Returns
AVChapter or NULL on error

Definition at line 835 of file utils.c.

Referenced by aa_read_header(), asf_read_marker(), concat_parse_script(), decode_info_header(), ff_id3v2_parse_chapters(), flac_read_header(), mov_metadata_hmmt(), mov_read_chapters(), mov_read_chpl(), ogm_chapter(), read_chapter(), and read_header().

◆ ff_reduce_index()

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 45 of file seek.c.

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

◆ ff_guess_image2_codec()

enum AVCodecID ff_guess_image2_codec ( const char *  filename)

◆ ff_find_decoder()

const AVCodec* ff_find_decoder ( AVFormatContext s,
const AVStream st,
enum AVCodecID  codec_id 
)

Definition at line 134 of file utils.c.

Referenced by av_find_best_stream(), and find_probe_decoder().

◆ ff_seek_frame_binary()

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_tstarget timestamp in the time base of the given stream
stream_indexstream number

Definition at line 282 of file seek.c.

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

◆ avpriv_update_cur_dts()

void avpriv_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
timestampnew dts expressed in time_base of param ref_st
ref_streference stream giving time_base of param timestamp

Definition at line 32 of file seek.c.

Referenced by aa_read_header(), aa_read_seek(), ff_seek_frame_binary(), idcin_read_seek(), mp3_seek(), mpc8_read_seek(), mxf_read_seek(), read_seek(), seek_frame_generic(), and vpk_read_seek().

◆ ff_find_last_ts()

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 352 of file seek.c.

Referenced by ff_gen_search(), and find_duration().

◆ ff_gen_search()

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_tstarget timestamp in the time base of the given stream
stream_indexstream number

Definition at line 390 of file seek.c.

Referenced by ff_seek_frame_binary(), and read_seek().

◆ avpriv_set_pts_info()

void avpriv_set_pts_info ( AVStream st,
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
ststream
pts_wrap_bitsnumber of bits effectively used by the pts (used for wrap control)
pts_numtime base numerator
pts_dentime base denominator

Definition at line 1146 of file utils.c.

Referenced by aa_read_header(), aax_read_header(), ace_read_header(), acm_read_header(), add_video_stream(), adp_read_header(), ads_read_header(), adts_aac_read_header(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), aix_read_header(), amr_read_header(), ape_read_header(), apng_read_header(), aqt_read_header(), argo_brp_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(), av1_read_header(), avformat_new_stream(), avi_read_header(), avi_write_header(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avr_read_header(), bfi_read_header(), binka_read_header(), bmv_read_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), cine_read_header(), codec2_read_header_common(), copy_stream_props(), create_audio_stream(), create_new_audio_stream(), create_stream(), dat_read_packet(), dc1394_read_common(), dcstr_read_header(), decklink_setup_audio(), decklink_setup_video(), decode_stream_header(), derf_read_header(), dfa_read_header(), dhav_read_packet(), dirac_header(), dsf_read_header(), dshow_add_device(), dss_read_header(), dtshd_read_header(), dv_extract_audio_info(), dv_extract_video_info(), dxa_read_header(), ea_read_header(), epaf_read_header(), fbdev_read_header(), ff_argo_asf_fill_stream(), ff_decklink_read_header(), ff_img_read_header(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), ff_voc_get_packet(), film_read_header(), fits_read_header(), flac_header(), flac_read_header(), flv_init(), fsb_read_header(), fwse_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), gdigrab_read_header(), gdv_read_header(), genh_read_header(), get_audio_config(), get_packet_header(), get_video_config(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), gxf_header(), gxf_write_header(), hca_read_header(), hcom_read_header(), hls_write_header(), hnm_read_header(), idcin_read_header(), iff_read_header(), ifv_read_header(), ilbc_read_header(), init_audio(), init_muxer(), init_stream(), init_video_stream(), ipmovie_read_header(), ipu_read_header(), ircam_read_header(), iss_read_header(), jacosub_read_header(), kmsgrab_read_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lrc_read_header(), lrc_write_header(), lvf_read_header(), lxf_read_header(), mcc_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_init(), mlp_read_header(), mmf_read_header(), modplug_read_header(), mods_read_header(), moflex_read_sync(), mov_init(), mov_read_trak(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegts_init(), mpegts_read_header(), mpegts_set_stream_info(), mpjpeg_read_header(), mpl2_read_header(), mpsub_read_header(), msf_read_header(), msnwc_tcp_read_header(), mtaf_read_header(), mtv_read_header(), musx_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_write_header(), nuv_header(), ogg_build_vp8_headers(), ogg_init(), ogg_new_stream(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_demux_for_component(), opus_header(), parse_audio_var(), parse_strk(), parse_video_var(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pp_bnk_read_header(), pulse_read_header(), pulse_write_header(), pva_read_header(), pvf_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), r3d_read_reda(), rawvideo_read_header(), read_frame(), read_gab2_sub(), read_header(), read_header_gme(), read_header_openmpt(), read_header_vs(), read_sl_header(), realtext_read_header(), redspark_read_header(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rsd_read_header(), rso_read_header(), rtp_write_header(), sami_read_header(), sbg_read_header(), scc_read_header(), scc_write_header(), sdr2_read_header(), sds_read_header(), seg_init(), seq_read_header(), ser_read_header(), set_stream_info_from_input_stream(), sga_audio_packet(), sga_video_packet(), siff_parse_vbv1(), simbiosis_imx_read_header(), 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(), stl_read_header(), str_read_packet(), subviewer1_read_header(), subviewer_read_header(), sup_read_header(), sup_write_header(), svag_read_header(), svs_read_header(), swf_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), threedostr_read_header(), tmv_read_header(), track_header(), tta_init(), tta_read_header(), ttml_write_header(), txd_read_header(), ty_read_header(), v210_read_header(), v4l2_read_header(), vag_read_header(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vorbis_header(), vp8_header(), vpk_read_header(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webm_chunk_init(), webp_init(), webvtt_read_header(), webvtt_write_header(), write_header(), write_stream_data(), wsaud_read_header(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), wve_read_header(), xa_read_header(), xmv_process_packet_header(), xvag_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

◆ ff_add_param_change()

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 1273 of file utils.c.

Referenced by flv_read_packet(), load_ipmovie_packet(), and swf_read_packet().

◆ ff_framehash_write_header()

int ff_framehash_write_header ( AVFormatContext s)

Set the timebase for each stream from the corresponding codec timebase and print it.

Definition at line 24 of file framehash.c.

Referenced by framecrc_write_header(), and write_header().

◆ ff_read_packet()

int ff_read_packet ( AVFormatContext s,
AVPacket pkt 
)

Read a transport packet from a media file.

Parameters
smedia file handle
pktis filled
Returns
0 if OK, AVERROR_xxx on error

Definition at line 524 of file demux.c.

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

◆ ff_add_attached_pic()

int ff_add_attached_pic ( AVFormatContext s,
AVStream st,
AVIOContext pb,
AVBufferRef **  buf,
int  size 
)

Add an attached pic to an AVStream.

Parameters
stif set, the stream to add the attached pic to; if unset, a new stream will be added to s.
pbAVIOContext to read data from if buf is unset.
bufif set, it contains the data and size information to be used for the attached pic; if unset, data is read from pb.
sizethe size of the data to read if buf is unset.
Returns
0 on success, < 0 on error. On error, this function removes the stream it has added (if any).

Definition at line 250 of file utils.c.

Referenced by ape_tag_read_field(), asf_read_picture(), ff_flac_parse_picture(), ff_id3v2_parse_apic(), get_attachment(), mov_read_chapters(), and mov_read_covr().

◆ ff_interleave_packet_per_dts()

int ff_interleave_packet_per_dts ( AVFormatContext s,
AVPacket pkt,
int  flush,
int  has_packet 
)

Interleave an AVPacket per dts so it can be muxed.

See the documentation of AVOutputFormat.interleave_packet for details.

Definition at line 906 of file mux.c.

Referenced by gxf_interleave_packet(), and interleave_packet().

◆ ff_free_stream()

void ff_free_stream ( AVFormatContext s,
AVStream st 
)

Definition at line 671 of file utils.c.

Referenced by avi_read_header(), ff_add_attached_pic(), and ff_rm_read_mdpr_codecdata().

◆ ff_codec_get_tag()

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

◆ ff_codec_get_id()

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

◆ ff_is_intra_only()

int ff_is_intra_only ( enum AVCodecID  id)

Definition at line 287 of file utils.c.

Referenced by compute_pkt_fields(), and init_muxer().

◆ ff_get_pcm_codec_id()

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
bpsbits-per-sample
fltfloating-point
bebig-endian
sflagssigned 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 368 of file utils.c.

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

◆ ff_choose_timebase()

AVRational ff_choose_timebase ( AVFormatContext s,
AVStream st,
int  min_precision 
)

Chooses a timebase for muxing the specified stream.

The chosen timebase allows sample accurate timestamps based on the framerate or sample rate for audio streams. It also is at least as precise as 1/min_precision would be.

Definition at line 91 of file mux.c.

Referenced by nut_write_header().

◆ ff_choose_chroma_location()

enum AVChromaLocation ff_choose_chroma_location ( AVFormatContext s,
AVStream st 
)

Chooses a timebase for muxing the specified stream.

Definition at line 106 of file mux.c.

Referenced by mxf_write_header().

◆ ff_generate_avci_extradata()

int ff_generate_avci_extradata ( AVStream st)

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

Definition at line 1536 of file utils.c.

Referenced by mov_read_trak(), and mxf_parse_structural_metadata().

◆ ff_stream_add_bitstream_filter()

int ff_stream_add_bitstream_filter ( AVStream st,
const char *  name,
const char *  args 
)

Add a bitstream filter to a stream.

Parameters
stoutput stream to add a filter to
namethe name of the filter to add
argsfilter-specific argument string
Returns
>0 on success; AVERROR code on failure

Definition at line 1739 of file utils.c.

Referenced by flv_check_bitstream(), gxf_write_header(), ivf_init(), latm_check_bitstream(), mkv_check_bitstream(), mov_check_bitstream(), mpegts_check_bitstream(), and mxf_write_header().

◆ ff_stream_encode_params_copy()

int ff_stream_encode_params_copy ( AVStream dst,
const AVStream src 
)

Copy encoding parameters from source to destination stream.

Parameters
dstpointer to destination AVStream
srcpointer to source AVStream
Returns
>=0 on success, AVERROR code on error

Definition at line 586 of file utils.c.

Referenced by fifo_mux_init(), open_slave(), segment_mux_init(), and webm_chunk_init().

◆ ff_rename()

int ff_rename ( const char *  url_src,
const char *  url_dst,
void *  logctx 
)

Wrap ffurl_move() and log if error happens.

Parameters
url_srcsource path
url_dstdestination path
Returns
0 or AVERROR on failure

Definition at line 665 of file avio.c.

Referenced by create_master_playlist(), dash_flush(), hds_flush(), hls_rename_temp_file(), hls_window(), ism_flush(), segment_end(), sls_flag_file_rename(), write_abst(), write_hls_media_playlist(), write_manifest(), and write_packet().

◆ ff_alloc_extradata()

int ff_alloc_extradata ( AVCodecParameters par,
int  size 
)

Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.

Previously allocated extradata in par will be freed.

Parameters
sizesize of extradata
Returns
0 if OK, AVERROR_xxx on error

Definition at line 451 of file utils.c.

Referenced by ace_read_header(), adts_write_packet(), afc_read_header(), ape_read_header(), apng_read_header(), celt_header(), codec2_read_header(), codec2raw_read_header(), concat_parse_script(), copy_stream_props(), dfa_read_header(), encode_intervals(), ff_generate_avci_extradata(), ff_get_extradata(), ff_parse_mpeg2_descriptor(), flac_header(), flv_set_video_codec(), flv_write_packet(), fsb_read_header(), genh_read_header(), hca_read_header(), hcom_read_header(), hevc_parse_sdp_line(), hnm_read_header(), iff_read_header(), latm_write_packet(), microdvd_read_header(), mkv_check_new_extra_data(), mov_create_chapter_track(), mov_read_dops(), mov_rewrite_dvd_sub_extradata(), msf_read_header(), mxf_parse_structural_metadata(), nist_read_header(), ogm_header(), oma_read_header(), opus_header(), opus_write_extradata(), parse_fmtp_config(), parse_packed_headers(), qdm2_parse_config(), read_header(), read_kuki_chunk(), redspark_read_header(), rsd_read_header(), seg_write_packet(), smacker_read_header(), smush_read_header(), speex_header(), svq3_parse_packet(), track_header(), tta_read_header(), update_stream_extradata(), vmd_read_header(), vqf_read_header(), wsvqa_read_packet(), wv_read_header(), xmv_process_packet_header(), and xwma_read_header().

◆ ff_get_extradata()

int ff_get_extradata ( AVFormatContext s,
AVCodecParameters par,
AVIOContext pb,
int  size 
)

◆ ff_rfps_add_frame()

int ff_rfps_add_frame ( AVFormatContext ic,
AVStream st,
int64_t  dts 
)

add frame for rfps calculation.

Parameters
dtstimestamp of the i-th frame
Returns
0 if OK, AVERROR_xxx on error

Definition at line 2155 of file demux.c.

Referenced by avformat_find_stream_info(), and mov_build_index().

◆ ff_rfps_calculate()

void ff_rfps_calculate ( AVFormatContext ic)

Definition at line 2215 of file demux.c.

Referenced by avformat_find_stream_info(), and mov_read_header().

◆ ff_copy_whiteblacklists()

int ff_copy_whiteblacklists ( AVFormatContext dst,
const AVFormatContext src 
)

Copies the whilelists from one context to the other.

Definition at line 114 of file utils.c.

Referenced by ff_wms_parse_sdp_a_line(), hls_read_header(), ism_write_header(), open_file(), rdt_init(), read_gab2_sub(), reopen_demux_for_component(), and sap_read_header().

◆ ff_format_output_open()

int ff_format_output_open ( AVFormatContext s,
const char *  url,
AVDictionary **  options 
)

Utility function to open IO stream of output format.

Parameters
sAVFormatContext
urlURL or file name to open for writing @options optional options which will be passed to io_open callback
Returns
>=0 on success, negative AVERROR in case of failure

Definition at line 1788 of file utils.c.

Referenced by fifo_thread_write_header(), and open_slave().

◆ ff_format_io_close()

void ff_format_io_close ( AVFormatContext s,
AVIOContext **  pb 
)

◆ ff_is_http_proto()

int ff_is_http_proto ( const char *  filename)

Utility function to check if the file uses http or https protocol.

Parameters
sAVFormatContext
filenameURL or file name to open for writing

Definition at line 1805 of file utils.c.

Referenced by dashenc_delete_file(), dashenc_io_close(), dashenc_io_open(), hls_init(), hlsenc_io_close(), hlsenc_io_open(), and set_http_options().

◆ ff_parse_creation_time_metadata()

int ff_parse_creation_time_metadata ( AVFormatContext s,
int64_t *  timestamp,
int  return_seconds 
)

Parse creation_time in AVFormatContext metadata if exists and warn if the parsing fails.

Parameters
sAVFormatContext
timestampparsed timestamp in microseconds, only set on successful parsing
return_secondsset this to get the number of seconds in timestamp instead of microseconds
Returns
1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error

Definition at line 1810 of file utils.c.

Referenced by asf_write_header1(), dv_init_mux(), ff_standardize_creation_time(), gxf_write_umf_material_description(), mkv_write_header(), mov_write_header(), and mxf_write_header().

◆ ff_standardize_creation_time()

int ff_standardize_creation_time ( AVFormatContext s)

Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.

Parameters
sAVFormatContext
Returns
<0 on error

Definition at line 1827 of file utils.c.

Referenced by caf_write_header(), ff_ape_write_tag(), ff_id3v2_write_metadata(), lrc_write_header(), smjpeg_write_header(), write_globalinfo(), write_metadata(), and write_table_entries_attrib().

◆ ff_reshuffle_raw_rgb()

int ff_reshuffle_raw_rgb ( AVFormatContext s,
AVPacket **  ppkt,
AVCodecParameters par,
int  expected_stride 
)

Reshuffles the lines to use the user specified stride.

Parameters
ppktinput and output packet
Returns
negative error code or 0 if no new packet was allocated non-zero if a new packet was allocated and ppkt has to be freed CONTAINS_PAL if in addition to a new packet the old contained a palette

Definition at line 25 of file rawutils.c.

Referenced by avi_write_packet(), and mov_write_packet().

◆ ff_get_packet_palette()

int ff_get_packet_palette ( AVFormatContext s,
AVPacket pkt,
int  ret,
uint32_t *  palette 
)

Retrieves the palette from a packet, either from side data, or appended to the video data in the packet itself (raw video only).

It is commonly used after a call to ff_reshuffle_raw_rgb().

Use 0 for the ret parameter to check for side data only.

Parameters
pktpointer to packet before calling ff_reshuffle_raw_rgb()
retreturn value from ff_reshuffle_raw_rgb(), or 0
palettepointer to palette buffer
Returns
negative error code or 1 if the packet has a palette, else 0

Definition at line 1836 of file utils.c.

Referenced by avi_write_packet(), and mov_write_packet().

◆ ff_bprint_to_codecpar_extradata()

int ff_bprint_to_codecpar_extradata ( AVCodecParameters par,
struct AVBPrint *  buf 
)

Finalize buf into extradata and set its size appropriately.

Definition at line 1860 of file utils.c.

Referenced by ass_read_header(), jacosub_read_header(), sami_read_header(), and subviewer_read_header().

◆ ff_interleaved_peek()

const AVPacket* ff_interleaved_peek ( AVFormatContext s,
int  stream 
)

Find the next packet in the interleaving queue for the given stream.

Returns
a pointer to a packet if one was found, NULL otherwise.

Definition at line 1044 of file mux.c.

Referenced by mov_flush_fragment().

◆ ff_get_muxer_ts_offset()

int ff_get_muxer_ts_offset ( AVFormatContext s,
int  stream_index,
int64_t *  offset 
)

Definition at line 1028 of file mux.c.

Referenced by mov_flush_fragment().

◆ ff_lock_avformat()

int ff_lock_avformat ( void  )

◆ ff_unlock_avformat()

int ff_unlock_avformat ( void  )

◆ ff_format_set_url()

void ff_format_set_url ( AVFormatContext s,
char *  url 
)

Set AVFormatContext url field to the provided pointer.

The pointer must point to a valid string. The existing url field is freed if necessary. Also set the legacy filename field to the same string which was provided in url.

Definition at line 1947 of file utils.c.

Referenced by hls_start(), parse_playlist(), sap_write_header(), set_segment_filename(), sls_flag_use_localtime_filename(), sls_flags_filename_process(), and webm_chunk_init().

◆ avpriv_register_devices()

void avpriv_register_devices ( const AVOutputFormat *const  o[],
const AVInputFormat *const  i[] 
)

Definition at line 579 of file allformats.c.

Referenced by avdevice_register_all().

tab
static const struct twinvq_data tab
Definition: twinvq_data.h:10345