various utility functions for use within FFmpeg More...

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

Macros
#define	LICENSE_PREFIX "libavformat license: "

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

#define	SANE_CHUNK_SIZE (50000000)

#define	DURATION_MAX_READ_SIZE 250000LL

#define	DURATION_MAX_RETRY 6

#define	FAIL(errmsg)

Functions
unsigned	avformat_version (void)
	Return the LIBAVFORMAT_VERSION_INT constant. More...

const char *	avformat_configuration (void)
	Return the libavformat build-time configuration. More...

const char *	avformat_license (void)
	Return the libavformat license. More...

int	ff_lock_avformat (void)

int	ff_unlock_avformat (void)

static int	is_relative (int64_t ts)

static int64_t	wrap_timestamp (const AVStream *st, int64_t timestamp)
	Wrap a given time stamp, if there is an indication for an overflow. More...

int64_t	av_stream_get_end_pts (const AVStream *st)
	Returns the pts of the last muxed packet + its duration. More...

struct AVCodecParserContext *	av_stream_get_parser (const AVStream *st)

void	av_format_inject_global_side_data (AVFormatContext *s)
	This function will cause global side data to be injected in the next packet of each stream as well as after any subsequent seek. More...

int	ff_copy_whiteblacklists (AVFormatContext dst, const AVFormatContext src)
	Copies the whilelists from one context to the other. More...

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

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

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. More...

int	av_append_packet (AVIOContext s, AVPacket pkt, int size)
	Read data and append it to the current content of the AVPacket. More...

int	av_filename_number_test (const char *filename)
	Check whether filename actually is a numbered sequence generator. More...

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

int	av_demuxer_open (AVFormatContext *ic)

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

int	ff_packet_list_put (AVPacketList packet_buffer, AVPacketList plast_pktl, AVPacket *pkt, int flags)
	Append an AVPacket to the list. More...

int	avformat_queue_attached_pictures (AVFormatContext *s)

static int	update_stream_avctx (AVFormatContext *s)

int	avformat_open_input (AVFormatContext *ps, const char filename, AVInputFormat fmt, AVDictionary *options)
	Open an input stream and read the header. More...

static void	force_codec_ids (AVFormatContext s, AVStream st)

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

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

int	ff_read_packet (AVFormatContext s, AVPacket pkt)
	Read a transport packet from a media file. More...

static int	determinable_frame_size (AVCodecContext *avctx)

void	ff_compute_frame_duration (AVFormatContext s, int pnum, int pden, AVStream st, AVCodecParserContext pc, AVPacket pkt)
	Return the frame duration in seconds. More...

static int	is_intra_only (enum AVCodecID id)

static int	has_decode_delay_been_guessed (AVStream *st)

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

static int64_t	select_from_pts_buffer (AVStream st, int64_t pts_buffer, int64_t dts)

static void	update_dts_from_pts (AVFormatContext s, int stream_index, AVPacketList pkt_buffer)
	Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts of the packets in a window. More...

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, int64_t next_dts, int64_t next_pts)

void	ff_packet_list_free (AVPacketList pkt_buf, AVPacketList pkt_buf_end)
	Wipe the list and unref all the packets in it. More...

static int	parse_packet (AVFormatContext s, AVPacket pkt, int stream_index)
	Parse a packet, add all split parts to parse_queue. More...

int	ff_packet_list_get (AVPacketList pkt_buffer, AVPacketList pkt_buffer_end, AVPacket *pkt)
	Remove the oldest AVPacket in the list and return it. More...

static int64_t	ts_to_samples (AVStream *st, int64_t ts)

static int	read_frame_internal (AVFormatContext s, AVPacket pkt)

int	av_read_frame (AVFormatContext s, AVPacket pkt)
	Return the next frame of a stream. More...

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. More...

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. 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...

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...

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. 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...

void	ff_configure_buffers_for_index (AVFormatContext *s, int64_t time_tolerance)

int	av_index_search_timestamp (AVStream *st, int64_t wanted_timestamp, int flags)
	Get the index for a specific timestamp. More...

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(). 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...

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. More...

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. More...

int	avformat_flush (AVFormatContext *s)
	Discard all internally buffered data. More...

static int	has_duration (AVFormatContext *ic)
	Return TRUE if the stream has accurate duration in any stream. More...

static void	update_stream_timings (AVFormatContext *ic)
	Estimate the stream timings from the one of each components. More...

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 (AVFormatContext s, 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. More...

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	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 ts)
	add frame for rfps calculation. More...

void	ff_rfps_calculate (AVFormatContext *ic)

static int	extract_extradata_check (AVStream *st)

static int	extract_extradata_init (AVStream *st)

static int	extract_extradata (AVStream st, AVPacket pkt)

int	avformat_find_stream_info (AVFormatContext ic, AVDictionary *options)
	Read packets of a media file to get stream information. More...

AVProgram *	av_find_program_from_stream (AVFormatContext ic, AVProgram last, int s)
	Find the programs which belong to a given stream. More...

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. More...

int	av_read_play (AVFormatContext *s)
	Start playing a network-based stream (e.g. More...

int	av_read_pause (AVFormatContext *s)
	Pause a network-based stream (e.g. More...

int	ff_stream_encode_params_copy (AVStream dst, const AVStream src)
	Copy encoding parameters from source to destination stream. More...

static void	free_stream (AVStream **pst)

void	ff_free_stream (AVFormatContext s, AVStream st)

void	avformat_free_context (AVFormatContext *s)
	Free an AVFormatContext and all its streams. More...

void	avformat_close_input (AVFormatContext **ps)
	Close an opened input AVFormatContext. More...

AVStream *	avformat_new_stream (AVFormatContext s, const AVCodec c)
	Add a new stream to a media file. More...

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. More...

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

uint64_t	ff_ntp_time (void)
	Get the current time since NTP epoch in microseconds. More...

int	av_get_frame_filename2 (char buf, int buf_size, const char path, int number, int flags)
	Return in 'buf' the path with 'd' replaced by a number. More...

int	av_get_frame_filename (char buf, int buf_size, const char path, int number)

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. More...

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. More...

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. 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	avformat_query_codec (const AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
	Test if the given container can store a codec. More...

int	avformat_network_init (void)
	Do global initialization of network libraries. More...

int	avformat_network_deinit (void)
	Undo the initialization done by avformat_network_init. 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...

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. More...

AVRational	av_guess_frame_rate (AVFormatContext format, AVStream st, AVFrame *frame)
	Guess the frame rate, based on both the container and codec information. More...

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. More...

int	ff_generate_avci_extradata (AVStream *st)
	Generate standard extradata for AVC-Intra based on width/height and field order. More...

uint8_t *	av_stream_get_side_data (const AVStream st, enum AVPacketSideDataType type, int size)
	Get side information from stream. More...

int	av_stream_add_side_data (AVStream st, enum AVPacketSideDataType type, uint8_t data, size_t size)
	Wrap an existing array as stream side data. More...

uint8_t *	av_stream_new_side_data (AVStream *st, enum AVPacketSideDataType type, int size)
	Allocate new information from stream. 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_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 (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_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...

int	avformat_transfer_internal_stream_timing_info (const AVOutputFormat ofmt, AVStream ost, const AVStream *ist, enum AVTimebaseSource copy_tb)
	Transfer internal timing information from one stream to another. More...

AVRational	av_stream_get_codec_timebase (const AVStream *st)
	Get the internal codec timebase from a stream. More...

void	ff_format_set_url (AVFormatContext s, char url)
	Set AVFormatContext url field to the provided pointer. More...

Variables
const char	av_format_ffversion [] = "FFmpeg version " FFMPEG_VERSION

static AVMutex	avformat_mutex = AV_MUTEX_INITIALIZER

Detailed Description

various utility functions for use within FFmpeg

Definition in file utils.c.

Macro Definition Documentation

◆ LICENSE_PREFIX

#define LICENSE_PREFIX "libavformat license: "

Referenced by avformat_license().

◆ RELATIVE_TS_BASE

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

Definition at line 93 of file utils.c.

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

◆ SANE_CHUNK_SIZE

#define SANE_CHUNK_SIZE (50000000)

Definition at line 245 of file utils.c.

Referenced by append_packet_chunked().

◆ DURATION_MAX_READ_SIZE

#define DURATION_MAX_READ_SIZE 250000LL

Definition at line 2775 of file utils.c.

Referenced by estimate_timings_from_pts().

◆ DURATION_MAX_RETRY

#define DURATION_MAX_RETRY 6

Definition at line 2776 of file utils.c.

Referenced by estimate_timings_from_pts().

◆ FAIL

#define FAIL ( errmsg )

Value:

do {                                         \
        if (errmsg_ptr)                                           \
            *errmsg_ptr = errmsg;                                 \
        return 0;                                                 \
    } while (0)

Referenced by has_codec_parameters().

Function Documentation

◆ ff_lock_avformat()

int ff_lock_avformat ( void )

Definition at line 83 of file utils.c.

Referenced by avisynth_read_close(), avisynth_read_header(), cleanup(), ff_gnutls_deinit(), ff_gnutls_init(), ff_openssl_deinit(), ff_openssl_init(), and write_header().

◆ ff_unlock_avformat()

int ff_unlock_avformat ( void )

Definition at line 88 of file utils.c.

Referenced by avisynth_read_close(), avisynth_read_header(), cleanup(), ff_gnutls_deinit(), ff_gnutls_init(), ff_openssl_deinit(), ff_openssl_init(), and write_header().

◆ is_relative()

static int is_relative ( int64_t ts )

static

Definition at line 95 of file utils.c.

Referenced by av_read_frame(), compute_pkt_fields(), ff_add_index_entry(), ff_read_packet(), ff_rfps_add_frame(), read_frame_internal(), and update_initial_timestamps().

◆ wrap_timestamp()

static int64_t wrap_timestamp	(	const 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 106 of file utils.c.

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

◆ av_stream_get_end_pts()

int64_t av_stream_get_end_pts ( const AVStream * st )

Returns the pts of the last muxed packet + its duration.

the retuned value is undefined when used with a demuxer.

Definition at line 141 of file utils.c.

Referenced by do_video_stats(), and print_report().

◆ av_stream_get_parser()

struct AVCodecParserContext* av_stream_get_parser ( const AVStream * st )

Definition at line 149 of file utils.c.

Referenced by process_input_packet().

◆ av_format_inject_global_side_data()

void av_format_inject_global_side_data ( AVFormatContext * s )

This function will cause global side data to be injected in the next packet of each stream as well as after any subsequent seek.

Definition at line 154 of file utils.c.

Referenced by read_thread().

◆ ff_copy_whiteblacklists()

int ff_copy_whiteblacklists	(	AVFormatContext *	dst,
		const AVFormatContext *	src
	)

Copies the whilelists from one context to the other.

Definition at line 164 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().

◆ find_decoder()

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

static

Definition at line 184 of file utils.c.

Referenced by av_find_best_stream(), and find_probe_decoder().

◆ find_probe_decoder()

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

static

Definition at line 208 of file utils.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

◆ ffio_limit()

int ffio_limit	(	AVIOContext *	s,
		int	size
	)

Definition at line 247 of file utils.c.

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

◆ append_packet_chunked()

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

static

Definition at line 269 of file utils.c.

Referenced by av_append_packet(), and av_get_packet().

◆ 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

s	associated IO context
pkt	packet
size	desired payload size

Returns: >0 (read size) if OK, AVERROR_xxx otherwise

Definition at line 310 of file utils.c.

Referenced by aal_read_packet(), adp_read_packet(), ads_read_packet(), adts_aac_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), aix_read_packet(), apc_read_packet(), ape_tag_read_field(), aptx_hd_read_packet(), aptx_read_packet(), asf_read_header(), asf_read_picture(), asf_read_subpayload(), ast_read_packet(), av_append_packet(), avi_read_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), cine_read_packet(), codec2_read_packet(), daud_packet(), dcstr_read_packet(), dfa_read_packet(), dsf_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(), fsb_read_packet(), g726_read_packet(), g729_read_packet(), gdv_read_packet(), genh_read_packet(), get_attachment(), gif_read_packet(), gsm_read_packet(), gxf_packet(), hnm_read_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_chapters(), mov_read_covr(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), mpjpeg_read_packet(), msf_read_packet(), msnwc_tcp_read_packet(), mtaf_read_packet(), mtv_read_packet(), musx_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(), pmp_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), read_dst_frame(), read_packet(), redspark_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), sdr2_read_packet(), seq_read_packet(), set_spdif(), siff_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), sup_read_packet(), svag_read_packet(), swf_read_packet(), thp_read_packet(), threedostr_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), v210_read_packet(), vag_read_packet(), vc1t_read_packet(), vid_read_packet(), vivo_read_packet(), vpk_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xvag_read_packet(), xwma_read_packet(), yop_read_packet(), and yuv4_read_packet().

◆ av_append_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

s	associated IO context
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 320 of file utils.c.

Referenced by adts_aac_read_packet(), apng_read_packet(), dfa_read_packet(), ea_read_packet(), handle_id3(), mpjpeg_read_packet(), read_packet(), sup_read_packet(), vivo_read_packet(), wc3_read_header(), and wc3_read_packet().

◆ set_codec_from_probe_data()

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

static

Definition at line 334 of file utils.c.

Referenced by probe_codec().

◆ init_input()

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

static

Definition at line 416 of file utils.c.

Referenced by avformat_open_input().

◆ ff_packet_list_put()

int ff_packet_list_put	(	AVPacketList **	head,
		AVPacketList **	tail,
		AVPacket *	pkt,
		int	flags
	)

Append an AVPacket to the list.

Parameters

head	List head element
tail	List tail element
pkt	The packet being appended
flags	Any combination of FF_PACKETLIST_FLAG_* flags

Returns: 0 on success, negative AVERROR value on failure. On failure, the list is unchanged

Definition at line 447 of file utils.c.

Referenced by av_read_frame(), avformat_find_stream_info(), avformat_queue_attached_pictures(), ff_read_packet(), flac_write_packet(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_parse_webvtt(), mp3_write_packet(), parse_packet(), and tta_write_packet().

◆ update_stream_avctx()

static int update_stream_avctx ( AVFormatContext * s )

static

Definition at line 502 of file utils.c.

Referenced by avformat_open_input(), and read_frame_internal().

◆ force_codec_ids()

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

static

Definition at line 693 of file utils.c.

Referenced by ff_read_packet(), and probe_codec().

◆ probe_codec()

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

static

Definition at line 715 of file utils.c.

Referenced by ff_read_packet(), and find_probe_decoder().

◆ update_wrap_reference()

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

static

Definition at line 765 of file utils.c.

Referenced by ff_read_packet().

◆ 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 831 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().

◆ determinable_frame_size()

static int determinable_frame_size ( AVCodecContext * avctx )

static

Definition at line 932 of file utils.c.

Referenced by has_codec_parameters().

◆ ff_compute_frame_duration()

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

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 948 of file utils.c.

Referenced by compute_pkt_fields(), and estimate_timings_from_pts().

◆ is_intra_only()

static int is_intra_only ( enum AVCodecID id )

static

Definition at line 1011 of file utils.c.

Referenced by compute_pkt_fields().

◆ has_decode_delay_been_guessed()

static int has_decode_delay_been_guessed ( AVStream * st )

static

Definition at line 1021 of file utils.c.

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

◆ get_next_pkt()

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

static

Definition at line 1039 of file utils.c.

Referenced by update_dts_from_pts(), update_initial_durations(), and update_initial_timestamps().

◆ select_from_pts_buffer()

static int64_t select_from_pts_buffer	(	AVStream *	st,
		int64_t *	pts_buffer,
		int64_t	dts
	)

static

Definition at line 1048 of file utils.c.

Referenced by compute_pkt_fields(), and update_dts_from_pts().

◆ update_dts_from_pts()

static void update_dts_from_pts	(	AVFormatContext *	s,
		int	stream_index,
		AVPacketList *	pkt_buffer
	)

static

Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts of the packets in a window.

Definition at line 1094 of file utils.c.

Referenced by avformat_find_stream_info(), and update_initial_timestamps().

◆ 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 1120 of file utils.c.

Referenced by compute_pkt_fields().

◆ update_initial_durations()

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

static

Definition at line 1172 of file utils.c.

Referenced by compute_pkt_fields().

◆ compute_pkt_fields()

static void compute_pkt_fields	(	AVFormatContext *	s,
		AVStream *	st,
		AVCodecParserContext *	pc,
		AVPacket *	pkt,
		int64_t	next_dts,
		int64_t	next_pts
	)

static

Definition at line 1228 of file utils.c.

Referenced by parse_packet(), and read_frame_internal().

◆ ff_packet_list_free()

void ff_packet_list_free	(	AVPacketList **	head,
		AVPacketList **	tail
	)

Wipe the list and unref all the packets in it.

Parameters

head	List head element
tail	List tail element

Definition at line 1418 of file utils.c.

Referenced by flush_packet_queue(), and matroska_clear_queue().

◆ parse_packet()

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 1437 of file utils.c.

Referenced by read_frame_internal().

◆ ff_packet_list_get()

int ff_packet_list_get	(	AVPacketList **	head,
		AVPacketList **	tail,
		AVPacket *	pkt
	)

Remove the oldest AVPacket in the list and return it.

Note: The pkt will be overwritten completely. The caller owns the packet and must unref it by itself.

Parameters

head	List head element
tail	List tail element
pkt	Pointer to an initialized AVPacket struct

Definition at line 1549 of file utils.c.

Referenced by av_read_frame(), flac_queue_flush(), matroska_deliver_packet(), mp3_queue_flush(), read_frame_internal(), and tta_queue_flush().

◆ ts_to_samples()

static int64_t ts_to_samples	(	AVStream *	st,
		int64_t	ts
	)

static

Definition at line 1564 of file utils.c.

Referenced by read_frame_internal().

◆ read_frame_internal()

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

static

Definition at line 1569 of file utils.c.

Referenced by av_read_frame(), and avformat_find_stream_info().

◆ flush_packet_queue()

static void flush_packet_queue ( AVFormatContext * s )

static

Definition at line 1865 of file utils.c.

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

◆ ff_read_frame_flush()

void ff_read_frame_flush ( AVFormatContext * s )

Flush the frame reader.

Definition at line 1917 of file utils.c.

Referenced by asf_read_pts(), avformat_flush(), avformat_seek_file(), dash_seek(), ff_seek_frame_binary(), hls_read_seek(), mpegts_get_dts(), seek_frame_generic(), and seek_frame_internal().

◆ ff_update_cur_dts()

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 1952 of file utils.c.

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

◆ 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 1966 of file utils.c.

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

◆ 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 1979 of file utils.c.

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

◆ 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 2047 of file utils.c.

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

◆ ff_configure_buffers_for_index()

void ff_configure_buffers_for_index	(	AVFormatContext *	s,
		int64_t	time_tolerance
	)

Definition at line 2090 of file utils.c.

Referenced by mov_read_header().

◆ ff_read_timestamp()

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 2153 of file utils.c.

Referenced by ff_find_last_ts(), and ff_gen_search().

◆ 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_ts	target timestamp in the time base of the given stream
stream_index	stream number

Definition at line 2162 of file utils.c.

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

◆ 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 2230 of file utils.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_ts	target timestamp in the time base of the given stream
stream_index	stream number

Definition at line 2268 of file utils.c.

Referenced by ff_seek_frame_binary(), and read_seek().

◆ seek_frame_byte()

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

static

Definition at line 2374 of file utils.c.

Referenced by seek_frame_internal().

◆ seek_frame_generic()

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

static

Definition at line 2394 of file utils.c.

Referenced by seek_frame_internal().

◆ seek_frame_internal()

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

static

Definition at line 2461 of file utils.c.

Referenced by av_seek_frame().

◆ has_duration()

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 2598 of file utils.c.

Referenced by estimate_timings().

◆ update_stream_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 2618 of file utils.c.

Referenced by estimate_timings(), and fill_all_stream_timings().

◆ fill_all_stream_timings()

static void fill_all_stream_timings ( AVFormatContext * ic )

static

Definition at line 2703 of file utils.c.

Referenced by estimate_timings(), and estimate_timings_from_pts().

◆ estimate_timings_from_bit_rate()

static void estimate_timings_from_bit_rate ( AVFormatContext * ic )

static

Definition at line 2722 of file utils.c.

Referenced by estimate_timings().

◆ estimate_timings_from_pts()

static void estimate_timings_from_pts	(	AVFormatContext *	ic,
		int64_t	old_offset
	)

static

Definition at line 2779 of file utils.c.

Referenced by estimate_timings().

◆ estimate_timings()

static void estimate_timings	(	AVFormatContext *	ic,
		int64_t	old_offset
	)

static

Definition at line 2905 of file utils.c.

Referenced by avformat_find_stream_info().

◆ has_codec_parameters()

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

static

Definition at line 2952 of file utils.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

◆ try_decode_frame()

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

static

Definition at line 3000 of file utils.c.

Referenced by avformat_find_stream_info().

◆ ff_codec_get_tag()

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

Definition at line 3098 of file utils.c.

Referenced by ast_write_header(), caf_write_header(), flv_write_header(), flv_write_packet(), gxf_write_header(), ircam_write_header(), mkv_write_codecprivate(), mkv_write_track(), mov_get_codec_tag(), mov_write_esds_tag(), mov_write_isml_manifest(), smjpeg_write_header(), swf_write_video(), and write_stream_codec_info().

◆ ff_codec_get_id()

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

◆ 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

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 3120 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().

◆ av_codec_get_tag()

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

Definition at line 3169 of file utils.c.

◆ av_codec_get_tag2()

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

Definition at line 3177 of file utils.c.

Referenced by av_codec_get_tag(), and avformat_query_codec().

◆ av_codec_get_id()

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

Definition at line 3194 of file utils.c.

◆ compute_chapters_end()

static void compute_chapters_end ( AVFormatContext * s )

static

Definition at line 3205 of file utils.c.

Referenced by avformat_find_stream_info().

◆ get_std_framerate()

static int get_std_framerate ( int i )

static

Definition at line 3232 of file utils.c.

Referenced by avformat_find_stream_info(), ff_rfps_add_frame(), and ff_rfps_calculate().

◆ tb_unreliable()

static int tb_unreliable ( AVCodecContext * c )

static

Definition at line 3256 of file utils.c.

Referenced by avformat_find_stream_info(), and ff_rfps_calculate().

◆ 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

size	size of extradata

Returns: 0 if OK, AVERROR_xxx on error

Definition at line 3271 of file utils.c.

Referenced by acm_read_header(), adts_write_packet(), afc_read_header(), ape_read_header(), celt_header(), codec2_read_header(), codec2raw_read_header(), copy_stream_props(), dfa_read_header(), encode_intervals(), ff_generate_avci_extradata(), ff_get_extradata(), ff_parse_mpeg2_descriptor(), ff_rename(), flac_header(), flic_read_header(), flv_set_video_codec(), fsb_read_header(), genh_read_header(), init_stream(), latm_write_packet(), matroska_parse_tracks(), matroska_read_header(), mkv_check_new_extra_data(), mov_create_chapter_track(), mov_read_dops(), msf_read_header(), mxf_parse_structural_metadata(), nist_read_header(), ogm_header(), oma_read_header(), opus_header(), parse_fmtp_config(), parse_packed_headers(), qdm2_parse_config(), read_header(), read_kuki_chunk(), redspark_read_header(), rsd_read_header(), set_spdif(), smacker_read_header(), smush_read_header(), speex_header(), svq3_parse_packet(), tta_read_header(), vmd_read_header(), vqf_read_header(), wsvqa_read_packet(), xmv_process_packet_header(), xwma_read_header(), and yop_read_header().

◆ ff_get_extradata()

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.

Parameters

size	size of extradata

Returns: >= 0 if OK, AVERROR_xxx on error

Definition at line 3289 of file utils.c.

Referenced by adx_read_header(), aiff_read_header(), aix_read_header(), apc_read_header(), ape_tag_read_field(), avi_read_header(), decode_stream_header(), ff_get_wav_header(), ff_mp4_read_dec_config_descr(), ff_rename(), flv_get_extradata(), get_codec_data(), idcin_read_header(), mov_parse_stsd_data(), mov_read_dfla(), mov_read_dvc1(), mov_read_glbl(), mov_read_strf(), mov_read_wave(), mpc8_read_header(), mpc_read_header(), read_header(), read_kuki_chunk(), rl2_read_header(), rm_read_extradata(), rsd_read_header(), set_spdif(), vc1t_read_header(), and wsvqa_read_header().

◆ ff_rfps_add_frame()

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

add frame for rfps calculation.

Parameters

dts	timestamp of the i-th frame

Returns: 0 if OK, AVERROR_xxx on error

Definition at line 3305 of file utils.c.

Referenced by avformat_find_stream_info(), ff_rename(), and mov_build_index().

◆ ff_rfps_calculate()

void ff_rfps_calculate ( AVFormatContext * ic )

Definition at line 3363 of file utils.c.

Referenced by avformat_find_stream_info(), ff_rename(), and mov_read_header().

◆ extract_extradata_check()

static int extract_extradata_check ( AVStream * st )

static

Definition at line 3429 of file utils.c.

Referenced by avformat_find_stream_info(), and extract_extradata_init().

◆ extract_extradata_init()

static int extract_extradata_init ( AVStream * st )

static

Definition at line 3447 of file utils.c.

Referenced by extract_extradata().

◆ extract_extradata()

static int extract_extradata	(	AVStream *	st,
		AVPacket *	pkt
	)

static

Definition at line 3495 of file utils.c.

Referenced by avformat_find_stream_info().

◆ 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

dst	pointer to destination AVStream
src	pointer to source AVStream

Returns: >=0 on success, AVERROR code on error

Definition at line 4254 of file utils.c.

Referenced by fifo_mux_init(), and open_slave().

◆ free_stream()

static void free_stream ( AVStream ** pst )

static

Definition at line 4315 of file utils.c.

Referenced by avformat_new_stream(), and ff_free_stream().

◆ ff_free_stream()

void ff_free_stream	(	AVFormatContext *	s,
		AVStream *	st
	)

Definition at line 4367 of file utils.c.

Referenced by avformat_free_context(), and ff_rm_read_mdpr_codecdata().

◆ avpriv_new_chapter()

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 4568 of file utils.c.

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

◆ av_program_add_stream_index()

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

Definition at line 4598 of file utils.c.

◆ ff_ntp_time()

uint64_t ff_ntp_time ( void )

Get the current time since NTP epoch in microseconds.

Definition at line 4626 of file utils.c.

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

◆ ff_data_to_hex()

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

Definition at line 4762 of file utils.c.

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

◆ 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

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 4783 of file utils.c.

Referenced by parse_fmtp_config(), and parse_playlist().

◆ avpriv_set_pts_info()

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 4811 of file utils.c.

Referenced by 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(), amr_read_packet(), ape_read_header(), apng_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(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avr_read_header(), bfi_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(), daala_header(), dc1394_read_common(), dcstr_read_header(), decklink_setup_audio(), decklink_setup_video(), decode_stream_header(), dfa_read_header(), dirac_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_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(), flic_read_header(), flv_write_header(), fsb_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_sockaddr(), get_video_config(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), gxf_header(), gxf_write_header(), hls_write_header(), hnm_read_header(), idcin_read_header(), iff_read_header(), ilbc_read_header(), init_audio(), init_muxer(), init_stream(), init_video_stream(), ipmovie_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(), matroska_parse_tracks(), microdvd_read_header(), microdvd_write_header(), mkv_init(), mmf_rate(), mmf_read_header(), modplug_read_header(), 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(), ndi_create_audio_stream(), ndi_create_video_stream(), ndi_setup_audio(), ndi_setup_video(), 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(), 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_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(), set_spdif(), set_stream_info_from_input_stream(), 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(), stl_read_header(), str_read_packet(), subviewer1_read_header(), subviewer_read_header(), sup_read_header(), sup_write_header(), svag_read_header(), swf_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), threedostr_read_header(), tmv_read_header(), tta_init(), tta_read_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_write_header(), webp_write_header(), 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_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

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 4841 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 4895 of file utils.c.

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

◆ 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 4943 of file utils.c.

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

◆ 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 5269 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

st	output stream to add a filter to
name	the name of the filter to add
args	filter-specific argument string

Returns: >0 on success; AVERROR code on failure

Definition at line 5474 of file utils.c.

Referenced by force_one_stream(), ivf_check_bitstream(), latm_check_bitstream(), mkv_check_bitstream(), mov_check_bitstream(), and mpegts_check_bitstream().

◆ 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

s	AVFormatContext
url	URL or file name to open for writing optional options which will be passed to io_open callback

Returns: >=0 on success, negative AVERROR in case of failure

Definition at line 5589 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 ( char * filename )

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

Parameters

s	AVFormatContext
filename	URL or file name to open for writing

Definition at line 5606 of file utils.c.

Referenced by dashenc_delete_file(), dashenc_io_close(), dashenc_io_open(), 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

s	AVFormatContext
timestamp	parsed timestamp in microseconds, only set on successful parsing
return_seconds	set 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 5611 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

s	AVFormatContext

Returns: <0 on error

Definition at line 5628 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_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

pkt	pointer to packet before calling ff_reshuffle_raw_rgb()
ret	return value from ff_reshuffle_raw_rgb(), or 0
palette	pointer to palette buffer

Returns: negative error code or 1 if the packet has a palette, else 0

Definition at line 5637 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 5662 of file utils.c.

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

◆ 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 5759 of file utils.c.

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

Variable Documentation

◆ av_format_ffversion

const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION

Definition at line 57 of file utils.c.

◆ avformat_mutex

AVMutex avformat_mutex = AV_MUTEX_INITIALIZER

static

Definition at line 59 of file utils.c.

Referenced by ff_lock_avformat(), and ff_unlock_avformat().

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ LICENSE_PREFIX

◆ RELATIVE_TS_BASE

◆ SANE_CHUNK_SIZE

◆ DURATION_MAX_READ_SIZE

◆ DURATION_MAX_RETRY

◆ FAIL

Function Documentation

◆ ff_lock_avformat()

◆ ff_unlock_avformat()

◆ is_relative()

◆ wrap_timestamp()

◆ av_stream_get_end_pts()

◆ av_stream_get_parser()

◆ av_format_inject_global_side_data()

◆ ff_copy_whiteblacklists()

◆ find_decoder()

◆ find_probe_decoder()

◆ ffio_limit()

◆ append_packet_chunked()

◆ av_get_packet()

◆ av_append_packet()

◆ set_codec_from_probe_data()

◆ init_input()

◆ ff_packet_list_put()

◆ update_stream_avctx()

◆ force_codec_ids()

◆ probe_codec()

◆ update_wrap_reference()

◆ ff_read_packet()

◆ determinable_frame_size()

◆ ff_compute_frame_duration()

◆ is_intra_only()

◆ has_decode_delay_been_guessed()

◆ get_next_pkt()

◆ select_from_pts_buffer()

◆ update_dts_from_pts()

◆ update_initial_timestamps()

◆ update_initial_durations()

◆ compute_pkt_fields()

◆ ff_packet_list_free()

◆ parse_packet()

◆ ff_packet_list_get()

◆ ts_to_samples()

◆ read_frame_internal()

◆ flush_packet_queue()

◆ ff_read_frame_flush()

◆ ff_update_cur_dts()

◆ ff_reduce_index()

◆ ff_add_index_entry()

◆ ff_index_search_timestamp()

◆ ff_configure_buffers_for_index()

◆ ff_read_timestamp()

◆ ff_seek_frame_binary()

◆ ff_find_last_ts()

◆ ff_gen_search()

◆ seek_frame_byte()

◆ seek_frame_generic()

◆ seek_frame_internal()

◆ has_duration()

◆ update_stream_timings()

◆ fill_all_stream_timings()

◆ estimate_timings_from_bit_rate()

◆ estimate_timings_from_pts()

◆ estimate_timings()

◆ has_codec_parameters()

◆ try_decode_frame()

◆ ff_codec_get_tag()

◆ ff_codec_get_id()

◆ ff_get_pcm_codec_id()

◆ av_codec_get_tag()

◆ av_codec_get_tag2()

◆ av_codec_get_id()

◆ compute_chapters_end()

◆ get_std_framerate()

◆ tb_unreliable()