#include <stdint.h>
#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/bsf.h"
#include "libavcodec/codec_desc.h"
#include "libavcodec/internal.h"
#include "packet_internal.h"
#include "libavcodec/raw.h"
#include "avformat.h"
#include "avformat_internal.h"
#include "avio_internal.h"
#include "demux.h"
#include "id3v2.h"
#include "internal.h"
#include "url.h"

Macros
#define	ABSDIFF(a, b)

#define	DURATION_DEFAULT_MAX_READ_SIZE 250000LL

#define	DURATION_DEFAULT_MAX_RETRY 6

#define	DURATION_MAX_RETRY 1

#define	FAIL(errmsg)

Functions
static int64_t	wrap_timestamp (const AVStream *st, int64_t 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.

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

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

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

static int	codec_close (FFStream *sti)

static int	update_stream_avctx (AVFormatContext *s)

static av_always_inline int	is_id3v2_format (const AVInputFormat *fmt)

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

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

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)

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

static int	handle_new_packet (AVFormatContext s, AVPacket pkt, int allow_passthrough)
	Handle a new packet and either return it directly if possible and allow_passthrough is true or queue the packet (or drop the packet if corrupt).

int	ff_buffer_packet (AVFormatContext s, AVPacket pkt)

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

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

static int	has_decode_delay_been_guessed (AVStream *st)

static PacketListEntry *	get_next_pkt (AVFormatContext s, AVStream st, PacketListEntry *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, PacketListEntry pkt_buffer)
	Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts of the packets in a window.

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, int64_t duration)

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

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

static int64_t	ts_to_samples (AVStream *st, int64_t ts)

static int	extract_extradata (FFFormatContext si, AVStream st, const AVPacket *pkt)

static int	read_frame_internal (AVFormatContext s, AVPacket pkt)

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

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

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

static void	fill_all_stream_timings (AVFormatContext *ic)

static void	estimate_timings_from_bit_rate (AVFormatContext *ic)

static void	estimate_timings_from_pts (AVFormatContext *ic, int64_t old_offset)

static const char *	duration_estimate_name (enum AVDurationEstimationMethod method)

static void	estimate_timings (AVFormatContext *ic, int64_t old_offset)

static int	determinable_frame_size (const AVCodecContext *avctx)

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

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

static int	chapter_start_cmp (const void p1, const void p2)

static int	compute_chapters_end (AVFormatContext *s)

static int	get_std_framerate (int i)

static int	tb_unreliable (AVFormatContext ic, AVStream st)

int	ff_rfps_add_frame (AVFormatContext ic, AVStream st, int64_t ts)
	add frame for rfps calculation.

void	ff_rfps_calculate (AVFormatContext *ic)

static int	extract_extradata_check (AVStream *st)

static int	extract_extradata_init (AVStream *st)

static int	parameters_from_context (AVFormatContext ic, AVCodecParameters par, const AVCodecContext *avctx)

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

Variables
static const char *const	duration_name []

Macro Definition Documentation

◆ ABSDIFF

#define ABSDIFF	(		a,
			b )

Value:

(((a) < (b)) ? (b) - (uint64_t)(a) : ((a) - (uint64_t)(b)))

a

int a

Definition h264pred_template.c:416

b

#define b

Definition input.c:43

Referenced by select_from_pts_buffer().

◆ DURATION_DEFAULT_MAX_READ_SIZE

#define DURATION_DEFAULT_MAX_READ_SIZE 250000LL

Definition at line 1869 of file demux.c.

Referenced by estimate_timings_from_pts().

◆ DURATION_DEFAULT_MAX_RETRY

#define DURATION_DEFAULT_MAX_RETRY 6

Definition at line 1870 of file demux.c.

Referenced by estimate_timings_from_pts().

◆ DURATION_MAX_RETRY

#define DURATION_MAX_RETRY 1

Definition at line 1871 of file demux.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

◆ wrap_timestamp()

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

static

Definition at line 53 of file demux.c.

Referenced by ff_wrap_timestamp(), and update_timestamps().

◆ 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

st	stream
timestamp	the time stamp to wrap

Returns: resulting time stamp

Definition at line 68 of file demux.c.

Referenced by av_add_index_entry(), and read_timestamp().

◆ find_probe_decoder()

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

static

Definition at line 73 of file demux.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

◆ set_codec_from_probe_data()

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

static

Definition at line 103 of file demux.c.

Referenced by probe_codec().

◆ init_input()

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

static

Definition at line 158 of file demux.c.

Referenced by avformat_open_input().

◆ codec_close()

static int codec_close ( FFStream * sti )

static

Definition at line 1339 of file demux.c.

Referenced by avformat_find_stream_info(), read_frame_internal(), and update_stream_avctx().

◆ update_stream_avctx()

static int update_stream_avctx ( AVFormatContext * s )

static

Definition at line 191 of file demux.c.

Referenced by avformat_find_stream_info(), and avformat_open_input().

◆ is_id3v2_format()

static av_always_inline int is_id3v2_format ( const AVInputFormat * fmt )

static

Definition at line 227 of file demux.c.

Referenced by avformat_open_input().

◆ force_codec_ids()

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

static

Definition at line 402 of file demux.c.

Referenced by probe_codec(), and update_timestamps().

◆ probe_codec()

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

static

Definition at line 424 of file demux.c.

Referenced by ff_read_packet(), find_probe_decoder(), and handle_new_packet().

◆ update_wrap_reference()

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

static

Definition at line 477 of file demux.c.

Referenced by update_timestamps().

◆ update_timestamps()

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

static

Definition at line 545 of file demux.c.

Referenced by handle_new_packet().

◆ handle_new_packet()

static int handle_new_packet	(	AVFormatContext *	s,
		AVPacket *	pkt,
		int	allow_passthrough )

static

Handle a new packet and either return it directly if possible and allow_passthrough is true or queue the packet (or drop the packet if corrupt).

Returns: < 0 on error, 0 if the packet was passed through, 1 if it was queued or dropped

Definition at line 577 of file demux.c.

Referenced by ff_buffer_packet(), and ff_read_packet().

◆ ff_buffer_packet()

int ff_buffer_packet	(	AVFormatContext *	s,
		AVPacket *	pkt )

Definition at line 622 of file demux.c.

Referenced by flv_read_packet(), and mov_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 629 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().

◆ compute_frame_duration()

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

static

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 696 of file demux.c.

Referenced by compute_pkt_fields(), and estimate_timings_from_pts().

◆ has_decode_delay_been_guessed()

static int has_decode_delay_been_guessed ( AVStream * st )

static

Definition at line 759 of file demux.c.

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

◆ get_next_pkt()

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

static

Definition at line 779 of file demux.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 791 of file demux.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,
		PacketListEntry *	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 844 of file demux.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 869 of file demux.c.

Referenced by compute_pkt_fields().

◆ update_initial_durations()

static void update_initial_durations	(	AVFormatContext *	s,
		AVStream *	st,
		int	stream_index,
		int64_t	duration )

static

Definition at line 923 of file demux.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 983 of file demux.c.

Referenced by parse_packet(), and read_frame_internal().

◆ parse_packet()

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

static

Parse a packet, add all split parts to parse_queue.

Parameters

pkt	Packet to parse; must not be NULL.
flush	Indicates whether to flush. If set, pkt must be blank.

Definition at line 1178 of file demux.c.

Referenced by read_frame_internal().

◆ ts_to_samples()

static int64_t ts_to_samples	(	AVStream *	st,
		int64_t	ts )

static

Definition at line 1334 of file demux.c.

Referenced by read_frame_internal().

◆ extract_extradata()

static int extract_extradata	(	FFFormatContext *	si,
		AVStream *	st,
		const AVPacket *	pkt )

static

Definition at line 2517 of file demux.c.

Referenced by avformat_find_stream_info(), and read_frame_internal().

◆ read_frame_internal()

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

static

Definition at line 1388 of file demux.c.

Referenced by av_read_frame(), and avformat_find_stream_info().

◆ 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 1688 of file demux.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 1705 of file demux.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 1799 of file demux.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 1816 of file demux.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 1874 of file demux.c.

Referenced by estimate_timings().

◆ duration_estimate_name()

static const char * duration_estimate_name ( enum AVDurationEstimationMethod method )

static

Definition at line 2022 of file demux.c.

Referenced by estimate_timings().

◆ estimate_timings()

static void estimate_timings	(	AVFormatContext *	ic,
		int64_t	old_offset )

static

Definition at line 2027 of file demux.c.

Referenced by avformat_find_stream_info().

◆ determinable_frame_size()

static int determinable_frame_size ( const AVCodecContext * avctx )

static

Definition at line 2076 of file demux.c.

Referenced by has_codec_parameters().

◆ has_codec_parameters()

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

static

Definition at line 2089 of file demux.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

◆ try_decode_frame()

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

static

Definition at line 2138 of file demux.c.

Referenced by avformat_find_stream_info().

◆ chapter_start_cmp()

static int chapter_start_cmp	(	const void *	p1,
		const void *	p2 )

static

Definition at line 2240 of file demux.c.

Referenced by compute_chapters_end().

◆ compute_chapters_end()

static int compute_chapters_end ( AVFormatContext * s )

static

Definition at line 2250 of file demux.c.

Referenced by avformat_find_stream_info().

◆ get_std_framerate()

static int get_std_framerate ( int i )

static

Definition at line 2287 of file demux.c.

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

◆ tb_unreliable()

static int tb_unreliable	(	AVFormatContext *	ic,
		AVStream *	st )

static

Definition at line 2311 of file demux.c.

Referenced by avformat_find_stream_info(), and ff_rfps_calculate().

◆ 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 2336 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 2397 of file demux.c.

Referenced by avformat_find_stream_info(), and mov_read_header().

◆ extract_extradata_check()

static int extract_extradata_check ( AVStream * st )

static

Definition at line 2461 of file demux.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 2477 of file demux.c.

Referenced by extract_extradata().

◆ parameters_from_context()

static int parameters_from_context	(	AVFormatContext *	ic,
		AVCodecParameters *	par,
		const AVCodecContext *	avctx )

static

Definition at line 2566 of file demux.c.

Referenced by avformat_find_stream_info().

Variable Documentation

◆ duration_name

const char* const duration_name[]

static

Initial value:

= {
    [AVFMT_DURATION_FROM_PTS]     = "pts",
    [AVFMT_DURATION_FROM_STREAM]  = "stream",
    [AVFMT_DURATION_FROM_BITRATE] = "bit rate",
}

Definition at line 2016 of file demux.c.

Referenced by duration_estimate_name().

Macros

Functions

Variables

Macro Definition Documentation

◆ ABSDIFF

◆ DURATION_DEFAULT_MAX_READ_SIZE

◆ DURATION_DEFAULT_MAX_RETRY

◆ DURATION_MAX_RETRY

◆ FAIL

Function Documentation

◆ wrap_timestamp()

◆ ff_wrap_timestamp()

◆ find_probe_decoder()

◆ set_codec_from_probe_data()

◆ init_input()

◆ codec_close()

◆ update_stream_avctx()

◆ is_id3v2_format()

◆ force_codec_ids()

◆ probe_codec()

◆ update_wrap_reference()

◆ update_timestamps()

◆ handle_new_packet()

◆ ff_buffer_packet()

◆ ff_read_packet()

◆ compute_frame_duration()

◆ 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()

◆ parse_packet()

◆ ts_to_samples()

◆ extract_extradata()

◆ read_frame_internal()

◆ has_duration()

◆ update_stream_timings()

◆ fill_all_stream_timings()

◆ estimate_timings_from_bit_rate()

◆ estimate_timings_from_pts()

◆ duration_estimate_name()

◆ estimate_timings()

◆ determinable_frame_size()

◆ has_codec_parameters()

◆ try_decode_frame()

◆ chapter_start_cmp()

◆ compute_chapters_end()

◆ get_std_framerate()

◆ tb_unreliable()

◆ ff_rfps_add_frame()

◆ ff_rfps_calculate()

◆ extract_extradata_check()

◆ extract_extradata_init()

◆ parameters_from_context()

Variable Documentation

◆ duration_name