#include <stdint.h>
#include "avformat.h"

Include dependency graph for libavformat/internal.h:

Data Structures
struct	AVCodecTag

struct	CodecMime

Macros
#define	MAX_URL_SIZE 4096

#define	hex_dump_debug(class, buf, size)

#define	dynarray_add(tab, nb_ptr, elem)

#define	NTP_OFFSET 2208988800ULL

#define	NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)

#define	SPACE_CHARS " \t\r\n"

Typedefs
typedef struct AVCodecTag	AVCodecTag

typedef struct CodecMime	CodecMime

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...

Functions
struct tm *	ff_brktimegm (time_t secs, struct tm *tm)

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...

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

int	ff_interleave_add_packet (AVFormatContext s, AVPacket pkt, int(compare)(AVFormatContext , AVPacket , AVPacket ))
	Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare() 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...

int	ff_url_join (char str, int size, const char proto, const char authorization, const char hostname, int port, const char *fmt,...) av_printf_format(7
	Assemble a URL string from components. More...

int void	ff_sdp_write_media (char buff, int size, AVStream st, int idx, const char dest_addr, const char dest_type, int port, int ttl, AVFormatContext *fmt)
	Append the media-specific SDP fragment for the media stream c to the buffer buff. More...

int	ff_write_chained (AVFormatContext dst, int dst_stream, AVPacket pkt, AVFormatContext *src)
	Write a packet to another muxer than the one the user originally intended. More...

int	ff_get_v_length (uint64_t val)
	Get the length in bytes which is needed to store val as v. More...

void	ff_put_v (AVIOContext *bc, uint64_t val)
	Put val using a variable number of bytes. More...

int	ff_get_line (AVIOContext s, char buf, int maxlen)
	Read a whole line of text from AVIOContext. 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...

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	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...

void	ff_make_absolute_url (char buf, int size, const char base, const char *rel)
	Convert a relative url into an absolute url, given a base url. More...

enum AVCodecID	ff_guess_image2_codec (const char *filename)

int64_t	ff_iso8601_to_unix_time (const char *datestr)
	Convert a date string in ISO8601 format to Unix timestamp. More...

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	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...

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 *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...

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_interleave_packet_per_dts (AVFormatContext s, AVPacket out, AVPacket *pkt, int flush)
	Interleave a packet per dts in an output media file. More...

void	ff_free_stream (AVFormatContext s, AVStream st)

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

int	ff_get_audio_frame_size (AVCodecContext *enc, int size, int mux)
	Get the number of samples of an audio frame. More...

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...

AVRational	ff_choose_timebase (AVFormatContext s, AVStream st, int min_precission)
	Chooses a timebase for muxing the specified stream. More...

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

int	ff_http_match_no_proxy (const char no_proxy, const char hostname)

Macro Definition Documentation

#define dynarray_add	(	tab,
		nb_ptr,
		elem
	)

Value:

do {\
    av_dynarray_add((tab), nb_ptr, (elem));\
} while(0)

Definition at line 54 of file libavformat/internal.h.

Referenced by av_new_program(), avpriv_new_chapter(), ff_rtsp_setup_output_streams(), get_sockaddr(), matroska_parse_frame(), matroska_parse_rm_audio(), mpegts_add_service(), new_variant(), and parse_playlist().

#define hex_dump_debug	(	class,
		buf,
		size
	)

Definition at line 32 of file libavformat/internal.h.

Referenced by pat_cb(), pmt_cb(), and sdt_cb().

#define MAX_URL_SIZE 4096

Definition at line 27 of file libavformat/internal.h.

Referenced by http_open_cnx(), http_read_header(), open_input(), and parse_playlist().

#define NTP_OFFSET 2208988800ULL

Definition at line 86 of file libavformat/internal.h.

#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)

Definition at line 87 of file libavformat/internal.h.

Referenced by ff_ntp_time(), and rtp_write_header().

#define SPACE_CHARS " \t\r\n"

Definition at line 176 of file libavformat/internal.h.

Referenced by concat_read_header(), ff_hex_to_data(), ff_rtsp_open_transport_ctx(), get_keyword(), get_sockaddr(), get_word(), get_word_until_chars(), process_line(), and rtsp_parse_range_npt().

Typedef Documentation

typedef struct AVCodecTag AVCodecTag

typedef struct CodecMime CodecMime

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

key	a pointer to the key
key_len	the number of bytes that belong to the key, including the '=' char
dest	return the destination pointer for the value in *dest, may be null to ignore the value
dest_len	the length of the *dest buffer

Definition at line 188 of file libavformat/internal.h.

Function Documentation

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 3449 of file libavformat/utils.c.

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

void 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 3952 of file libavformat/utils.c.

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

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 1716 of file libavformat/utils.c.

Referenced by av_add_index_entry(), and read_header().

int ff_add_param_change	(	AVPacket *	pkt,
		int32_t	channels,
		uint64_t	channel_layout,
		int32_t	sample_rate,
		int32_t	width,
		int32_t	height
	)

Add side data to a packet for changing parameters to the given values.

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

Definition at line 4217 of file libavformat/utils.c.

Referenced by flv_read_packet(), and load_ipmovie_packet().

struct tm* ff_brktimegm	(	time_t	secs,
		struct tm *	tm
	)

Definition at line 29 of file cutils.c.

Referenced by dv_write_pack().

AVRational ff_choose_timebase	(	AVFormatContext *	s,
		AVStream *	st,
		int	min_precission
	)

Chooses a timebase for muxing the specified stream.

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

Definition at line 106 of file mux.c.

Referenced by nut_write_header().

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

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

Definition at line 2604 of file libavformat/utils.c.

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

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

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 897 of file libavformat/utils.c.

Referenced by compute_pkt_fields(), and compute_pkt_fields2().

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

Definition at line 3895 of file libavformat/utils.c.

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

int ff_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 4091 of file libavformat/utils.c.

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

int ff_framehash_write_header ( AVFormatContext * s )

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

Definition at line 23 of file framehash.c.

Referenced by md5_finish().

void ff_free_stream	(	AVFormatContext *	s,
		AVStream *	st
	)

Definition at line 3269 of file libavformat/utils.c.

Referenced by avformat_free_context(), and ff_rm_read_mdpr_codecdata().

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 1889 of file libavformat/utils.c.

Referenced by ff_seek_frame_binary(), and read_seek().

void ff_generate_avci_extradata ( AVStream * st )

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

Definition at line 4368 of file libavformat/utils.c.

Referenced by mov_read_trak(), and mxf_parse_structural_metadata().

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

Get the number of samples of an audio frame.

Return -1 on error.

Definition at line 868 of file libavformat/utils.c.

Referenced by compute_pkt_fields2(), and ff_compute_frame_duration().

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

s	the read-only AVIOContext
buf	buffer to store the read line
maxlen	size of the buffer

Returns: the length of the string written in the buffer, not including the final \0

Definition at line 618 of file aviobuf.c.

Referenced by aqt_read_header(), concat_read_header(), jacosub_read_header(), microdvd_read_header(), mpl2_read_header(), mpsub_read_header(), nist_read_header(), pjs_read_header(), pvf_read_header(), read_chomp_line(), subviewer1_read_header(), subviewer_read_header(), and vplayer_read_header().

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 2628 of file libavformat/utils.c.

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

int ff_get_v_length ( uint64_t val )

Get the length in bytes which is needed to store val as v.

Definition at line 335 of file aviobuf.c.

Referenced by ff_put_v(), and nut_write_packet().

enum AVCodecID ff_guess_image2_codec ( const char * filename )

Definition at line 99 of file img2.c.

Referenced by ape_tag_read_field(), av_guess_codec(), av_guess_format(), img_read_header(), and img_read_probe().

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 3916 of file libavformat/utils.c.

Referenced by parse_fmtp_config(), and parse_playlist().

int ff_http_match_no_proxy	(	const char *	no_proxy,
		const char *	hostname
	)

Definition at line 4487 of file libavformat/utils.c.

Referenced by http_open_cnx(), test(), and tls_open().

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 1777 of file libavformat/utils.c.

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

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

Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare() function argument.

Returns: 0, or < 0 on error

Definition at line 536 of file mux.c.

Referenced by ff_audio_rechunk_interleave(), and ff_interleave_packet_per_dts().

int ff_interleave_packet_per_dts	(	AVFormatContext *	s,
		AVPacket *	out,
		AVPacket *	pkt,
		int	flush
	)

Interleave a packet per dts in an output media file.

Packets with pkt->destruct == av_destruct_packet will be freed inside this function, so they cannot be used after it. Note that calling av_free_packet() on them is still safe.

Parameters

s	media file handle
out	the interleaved packet will be output here
pkt	the input packet
flush	1 if no further packets are available as input and all remaining packets should be output

Returns: 1 if a packet was output, 0 if no packet could be output, < 0 if an error occurred

Definition at line 625 of file mux.c.

Referenced by gxf_interleave_packet(), and interleave_packet().

int64_t ff_iso8601_to_unix_time ( const char * datestr )

Convert a date string in ISO8601 format to Unix timestamp.

Definition at line 4170 of file libavformat/utils.c.

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

void ff_make_absolute_url	(	char *	buf,
		int	size,
		const char *	base,
		const char *	rel
	)

Convert a relative url into an absolute url, given a base url.

Parameters

buf	the buffer where output absolute url is written
size	the size of buf
base	the base url, may be equal to buf.
rel	the new url, which is interpreted relative to base

Definition at line 4101 of file libavformat/utils.c.

Referenced by add_file(), new_variant(), parse_playlist(), and test().

uint64_t ff_ntp_time ( void )

Get the current time since NTP epoch in microseconds.

Definition at line 3679 of file libavformat/utils.c.

Referenced by rtp_write_header(), and rtp_write_packet().

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 4037 of file libavformat/utils.c.

Referenced by ff_http_auth_handle_header(), and parse_playlist().

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

Definition at line 3473 of file libavformat/utils.c.

Referenced by hls_read_header(), and pmt_cb().

void ff_put_v	(	AVIOContext *	bc,
		uint64_t	val
	)

Put val using a variable number of bytes.

Definition at line 345 of file aviobuf.c.

Referenced by nut_write_packet(), put_packet(), put_s(), put_str(), put_tt(), write_chapter(), write_globalinfo(), write_index(), write_mainheader(), write_streamheader(), and write_streaminfo().

void ff_read_frame_flush ( AVFormatContext * s )

Flush the frame reader.

Definition at line 1663 of file libavformat/utils.c.

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

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 769 of file libavformat/utils.c.

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

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 1703 of file libavformat/utils.c.

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

int void ff_sdp_write_media	(	char *	buff,
		int	size,
		AVStream *	st,
		int	idx,
		const char *	dest_addr,
		const char *	dest_type,
		int	port,
		int	ttl,
		AVFormatContext *	fmt
	)

Append the media-specific SDP fragment for the media stream c to the buffer buff.

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

Parameters

buff	the buffer to append the SDP fragment to
size	the size of the buff buffer
st	the AVStream of the media to describe
idx	the global stream index
dest_addr	the destination address of the media stream, may be NULL
dest_type	the destination address type, may be NULL
port	the destination port of the media stream, 0 if unknown
ttl	the time to live of the stream, 0 if not multicast
fmt	the AVFormatContext, which might contain options modifying the generated SDP

Definition at line 708 of file sdp.c.

Referenced by mov_write_udta_sdp().

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 1827 of file libavformat/utils.c.

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

void ff_update_cur_dts	(	AVFormatContext *	s,
		AVStream *	ref_st,
		int64_t	timestamp
	)

Update cur_dts of all streams based on the given timestamp and AVStream.

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

Parameters

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

Definition at line 1690 of file libavformat/utils.c.

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

int ff_url_join	(	char *	str,
		int	size,
		const char *	proto,
		const char *	authorization,
		const char *	hostname,
		int	port,
		const char *	fmt,
			...
	)

Assemble a URL string from components.

This is the reverse operation of av_url_split.

Note, this requires networking to be initialized, so the caller must ensure ff_network_init has been called.

See also: av_url_split

Parameters

str	the buffer to fill with the url
size	the size of the str buffer
proto	the protocol identifier, if null, the separator after the identifier is left out, too
authorization	an optional authorization string, may be null. An empty string is treated the same as a null string.
hostname	the host name string
port	the port number, left out from the string if negative
fmt	a generic format string for everything to add after the host/port, may be null

Returns: the number of characters written to the destination buffer

Referenced by build_udp_url(), ff_rtp_set_remote_url(), ff_rtsp_open_transport_ctx(), ff_rtsp_setup_output_streams(), gopher_open(), http_get_file_handle(), http_open_cnx(), mms_open(), mmsh_open_internal(), rtmp_http_open(), rtmp_http_send_cmd(), rtmp_open(), rtmpe_open(), rtsp_listen(), rtsp_read_setup(), sap_read_header(), sap_write_header(), srtp_open(), and tls_open().

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

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

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

Parameters

dst	the muxer to write the packet to
dst_stream	the stream index within dst to write the packet to
pkt	the packet to be written
src	the muxer the packet originally was intended for

Returns: the value av_write_frame returned

Definition at line 4015 of file libavformat/utils.c.

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

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