various utility functions for use within FFmpeg More...

#include <assert.h>
#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/time.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"

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 4

#define	FAIL(errmsg)

#define	HEXDUMP_PRINT(...)

Functions
unsigned	avformat_version (void)
	Return the LIBAVFORMAT_VERSION_INT constant.

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

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

static int	is_relative (int64_t ts)

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

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

int	av_format_get_probe_score (const AVFormatContext *s)

int	ffio_limit (AVIOContext *s, int size)

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

int	av_get_packet (AVIOContext s, AVPacket pkt, int size)
	Allocate and read the payload of a packet and initialize its fields with default values.

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

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

AVInputFormat *	av_probe_input_format3 (AVProbeData pd, int is_opened, int score_ret)
	Guess the file format.

AVInputFormat *	av_probe_input_format2 (AVProbeData pd, int is_opened, int score_max)
	Guess the file format.

AVInputFormat *	av_probe_input_format (AVProbeData *pd, int is_opened)
	Guess the file format.

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

int	av_demuxer_open (AVFormatContext *ic)

int	av_probe_input_buffer2 (AVIOContext pb, AVInputFormat fmt, const char filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
	Probe a bytestream to determine the input format.

int	av_probe_input_buffer (AVIOContext pb, AVInputFormat fmt, const char filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
	Like av_probe_input_buffer2() but returns 0 on success.

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

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

int	avformat_queue_attached_pictures (AVFormatContext *s)

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

static void	force_codec_ids (AVFormatContext s, AVStream st)

static 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.

static int	determinable_frame_size (AVCodecContext *avctx)

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

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

static int	is_intra_only (AVCodecContext *enc)

static int	has_decode_delay_been_guessed (AVStream *st)

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

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

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

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

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

static void	free_packet_buffer (AVPacketList pkt_buf, AVPacketList pkt_buf_end)

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

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

static int	read_frame_internal (AVFormatContext s, AVPacket pkt)

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

static void	flush_packet_queue (AVFormatContext *s)

int	av_find_default_stream_index (AVFormatContext *s)

void	ff_read_frame_flush (AVFormatContext *s)
	Flush the frame reader.

void	ff_update_cur_dts (AVFormatContext s, AVStream ref_st, int64_t timestamp)
	Update cur_dts of all streams based on the given timestamp and AVStream.

void	ff_reduce_index (AVFormatContext *s, int stream_index)
	Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by discarding entries if it grows too large.

int	ff_add_index_entry (AVIndexEntry *index_entries, int nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
	Internal version of av_add_index_entry.

int	av_add_index_entry (AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
	Add an index entry into a sorted list.

int	ff_index_search_timestamp (const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
	Internal version of av_index_search_timestamp.

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

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

int	ff_seek_frame_binary (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
	Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().

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

int64_t	ff_gen_search (AVFormatContext s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t ts_ret, int64_t(read_timestamp)(struct AVFormatContext , int, int64_t *, int64_t))
	Perform a binary search using read_timestamp().

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

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

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

int	av_seek_frame (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
	Seek to the keyframe at timestamp.

int	avformat_seek_file (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
	Seek to timestamp ts.

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

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

static void	fill_all_stream_timings (AVFormatContext *ic)

static void	estimate_timings_from_bit_rate (AVFormatContext *ic)

static void	estimate_timings_from_pts (AVFormatContext *ic, int64_t old_offset)

static void	estimate_timings (AVFormatContext *ic, int64_t old_offset)

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

static int	try_decode_frame (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.

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 (AVCodecContext *avctx, int size)
	Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.

int	ff_get_extradata (AVCodecContext avctx, AVIOContext pb, int size)
	Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and fill it from pb.

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

void	ff_rfps_calculate (AVFormatContext *ic)

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

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

int	av_find_best_stream (AVFormatContext ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec *decoder_ret, int flags)
	Find the "best" stream in the file.

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

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

void	ff_free_stream (AVFormatContext s, AVStream st)

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

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

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

AVProgram *	av_new_program (AVFormatContext *ac, int id)

AVChapter *	avpriv_new_chapter (AVFormatContext s, int id, AVRational time_base, int64_t start, int64_t end, const char title)
	Add a new chapter.

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

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

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

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

void	av_dump_format (AVFormatContext ic, int index, const char url, int is_output)

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

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

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

void	av_hex_dump (FILE f, const uint8_t buf, int size)
	Send a nice hexadecimal dump of a buffer to the specified file stream.

void	av_hex_dump_log (void avcl, int level, const uint8_t buf, int size)
	Send a nice hexadecimal dump of a buffer to the log.

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

void	av_pkt_dump2 (FILE f, AVPacket pkt, int dump_payload, AVStream *st)
	Send a nice dump of a packet to the specified file stream.

void	av_pkt_dump_log2 (void avcl, int level, AVPacket pkt, int dump_payload, AVStream *st)
	Send a nice dump of a packet to the log.

void	av_url_split (char proto, int proto_size, char authorization, int authorization_size, char hostname, int hostname_size, int port_ptr, char path, int path_size, const char url)
	Split a URL string into components.

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

int	ff_hex_to_data (uint8_t data, const char p)
	Parse a string of hexadecimal strings.

void	avpriv_set_pts_info (AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
	Set the time base and wrapping info for a given stream.

void	ff_parse_key_value (const char str, ff_parse_key_val_cb callback_get_buf, void context)
	Parse a string with comma-separated key=value pairs.

int	ff_find_stream_index (AVFormatContext *s, int id)
	Find stream index based on format-specific stream ID.

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

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

int	avformat_network_init (void)
	Do global initialization of network components.

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

int	ff_add_param_change (AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
	Add side data to a packet for changing parameters to the given values.

AVRational	av_guess_sample_aspect_ratio (AVFormatContext format, AVStream stream, AVFrame *frame)
	Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio.

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

int	avformat_match_stream_specifier (AVFormatContext s, AVStream st, const char *spec)
	Check if the stream st contained in s is matched by the stream specifier spec.

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

Detailed Description

various utility functions for use within FFmpeg

Definition in file utils.c.

Macro Definition Documentation

#define LICENSE_PREFIX "libavformat license: "

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

Definition at line 78 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(), update_initial_durations(), and update_initial_timestamps().

#define SANE_CHUNK_SIZE (50000000)

Definition at line 139 of file utils.c.

Referenced by append_packet_chunked().

#define DURATION_MAX_READ_SIZE 250000LL

Definition at line 2432 of file utils.c.

Referenced by estimate_timings_from_pts().

#define DURATION_MAX_RETRY 4

Definition at line 2433 of file utils.c.

Referenced by estimate_timings_from_pts().

#define FAIL ( errmsg )

Value:

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

#define HEXDUMP_PRINT ( ... )

Value:

do {                                        \
        if (!f)                                 \
            av_log(avcl, level, __VA_ARGS__);   \
        else                                    \
            fprintf(f, __VA_ARGS__);            \
    } while (0)

Definition at line 3989 of file utils.c.

Referenced by hex_dump_internal(), and pkt_dump_internal().

Function Documentation

static int is_relative ( int64_t ts )

static

Definition at line 80 of file utils.c.

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

static int64_t wrap_timestamp	(	AVStream *	st,
		int64_t	timestamp
	)

static

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

Parameters

st	stream
timestamp	the time stamp to wrap

Returns: resulting time stamp

Definition at line 91 of file utils.c.

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

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

static

Definition at line 113 of file utils.c.

Referenced by av_find_best_stream(), avformat_find_stream_info(), and try_decode_frame().

int av_format_get_probe_score ( const AVFormatContext * s )

Definition at line 133 of file utils.c.

Referenced by show_format().

int ffio_limit	(	AVIOContext *	s,
		int	size
	)

Definition at line 141 of file utils.c.

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

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

static

Definition at line 163 of file utils.c.

Referenced by av_append_packet(), and av_get_packet().

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

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

Parameters

s	associated IO context
pkt	packet
size	desired payload size

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

Definition at line 204 of file utils.c.

Referenced by adp_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), apc_read_packet(), ape_tag_read_field(), asf_read_header(), asf_read_picture(), ast_read_packet(), av_append_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), daud_packet(), dfa_read_packet(), dxa_read_packet(), ea_read_packet(), ff_pcm_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_voc_get_packet(), film_read_packet(), flv_data_packet(), flv_read_packet(), fourxm_read_packet(), frm_read_packet(), g729_read_packet(), get_attachment(), gif_read_packet(), gsm_read_packet(), gxf_packet(), 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_covr(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), msnwc_tcp_read_packet(), mtv_read_packet(), mv_read_packet(), mxf_decrypt_triplet(), mxf_get_d10_aes3_packet(), mxf_read_packet(), mxf_read_packet_old(), nc_read_packet(), nsv_read_chunk(), nuv_packet(), oma_read_packet(), pmp_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), read_packet(), redspark_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), sdr2_read_packet(), seq_read_packet(), siff_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), swf_read_packet(), thp_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vc1t_read_packet(), vid_read_packet(), vivo_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xwma_read_packet(), yop_read_packet(), and yuv4_read_packet().

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

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

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

Parameters

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 214 of file utils.c.

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

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

static

Definition at line 291 of file utils.c.

Referenced by probe_codec().

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

static

Definition at line 446 of file utils.c.

Referenced by avformat_open_input().

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

static

Definition at line 477 of file utils.c.

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

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

static

Definition at line 610 of file utils.c.

Referenced by ff_read_packet(), and probe_codec().

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

static

Definition at line 628 of file utils.c.

Referenced by ff_read_packet().

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

static

Definition at line 678 of file utils.c.

Referenced by ff_read_packet().

int ff_read_packet	(	AVFormatContext *	s,
		AVPacket *	pkt
	)

Read a transport packet from a media file.

Parameters

s	media file handle
pkt	is filled

Returns: 0 if OK, AVERROR_xxx on error

Definition at line 742 of file utils.c.

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

static int determinable_frame_size ( AVCodecContext * avctx )

static

Definition at line 837 of file utils.c.

Referenced by has_codec_parameters().

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

Get the number of samples of an audio frame.

Return -1 on error.

Definition at line 851 of file utils.c.

Referenced by compute_pkt_fields2(), and ff_compute_frame_duration().

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

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 879 of file utils.c.

Referenced by compute_pkt_fields(), and compute_pkt_fields2().

static int is_intra_only ( AVCodecContext * enc )

static

Definition at line 922 of file utils.c.

Referenced by compute_pkt_fields().

static int has_decode_delay_been_guessed ( AVStream * st )

static

Definition at line 938 of file utils.c.

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

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

static

Definition at line 956 of file utils.c.

Referenced by update_initial_durations(), and update_initial_timestamps().

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

static

Definition at line 965 of file utils.c.

Referenced by compute_pkt_fields(), and 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 1007 of file utils.c.

Referenced by compute_pkt_fields().

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

static

Definition at line 1058 of file utils.c.

Referenced by compute_pkt_fields().

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

static

Definition at line 1111 of file utils.c.

Referenced by parse_packet(), and read_frame_internal().

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

static

Definition at line 1284 of file utils.c.

Referenced by avformat_find_stream_info(), and flush_packet_queue().

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

static

Parse a packet, add all split parts to parse_queue.

Parameters

pkt	Packet to parse, NULL when flushing the parser at end of stream.

Definition at line 1300 of file utils.c.

Referenced by read_frame_internal().

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

static

Definition at line 1410 of file utils.c.

Referenced by av_read_frame(), and read_frame_internal().

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

static

Definition at line 1425 of file utils.c.

Referenced by av_read_frame(), and avformat_find_stream_info().

static void flush_packet_queue ( AVFormatContext * s )

static

Definition at line 1639 of file utils.c.

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

void ff_read_frame_flush ( AVFormatContext * s )

Flush the frame reader.

Definition at line 1673 of file utils.c.

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

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

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

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

Parameters

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

Definition at line 1703 of file utils.c.

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

void ff_reduce_index	(	AVFormatContext *	s,
		int	stream_index
	)

Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by discarding entries if it grows too large.

Definition at line 1717 of file utils.c.

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

int ff_add_index_entry	(	AVIndexEntry **	index_entries,
		int *	nb_index_entries,
		unsigned int *	index_entries_allocated_size,
		int64_t	pos,
		int64_t	timestamp,
		int	size,
		int	distance,
		int	flags
	)

Internal version of av_add_index_entry.

Definition at line 1730 of file utils.c.

Referenced by av_add_index_entry(), and read_header().

int ff_index_search_timestamp	(	const AVIndexEntry *	entries,
		int	nb_entries,
		int64_t	wanted_timestamp,
		int	flags
	)

Internal version of av_index_search_timestamp.

Definition at line 1798 of file utils.c.

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

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

static

Definition at line 1837 of file utils.c.

Referenced by ff_find_last_ts(), and ff_gen_search().

int ff_seek_frame_binary	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int	flags
	)

Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().

Parameters

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

Definition at line 1846 of file utils.c.

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

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

Definition at line 1914 of file utils.c.

Referenced by ff_gen_search(), and find_duration().

int64_t ff_gen_search	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int64_t	pos_min,
		int64_t	pos_max,
		int64_t	pos_limit,
		int64_t	ts_min,
		int64_t	ts_max,
		int	flags,
		int64_t *	ts_ret,
		int64_t()(struct AVFormatContext , int, int64_t *, int64_t)	read_timestamp
	)

Perform a binary search using read_timestamp().

Parameters

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

Definition at line 1952 of file utils.c.

Referenced by ff_seek_frame_binary(), and read_seek().

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

static

Definition at line 2062 of file utils.c.

Referenced by seek_frame_internal().

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

static

Definition at line 2082 of file utils.c.

Referenced by seek_frame_internal().

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

static

Definition at line 2146 of file utils.c.

Referenced by av_seek_frame().

static int has_duration ( AVFormatContext * ic )

static

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

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

Definition at line 2276 of file utils.c.

Referenced by estimate_timings().

static void update_stream_timings ( AVFormatContext * ic )

static

Estimate the stream timings from the one of each components.

Also computes the global bitrate if possible.

Definition at line 2296 of file utils.c.

Referenced by estimate_timings(), and fill_all_stream_timings().

static void fill_all_stream_timings ( AVFormatContext * ic )

static

Definition at line 2368 of file utils.c.

Referenced by estimate_timings(), and estimate_timings_from_pts().

static void estimate_timings_from_bit_rate ( AVFormatContext * ic )

static

Definition at line 2387 of file utils.c.

Referenced by estimate_timings().

static void estimate_timings_from_pts	(	AVFormatContext *	ic,
		int64_t	old_offset
	)

static

Definition at line 2436 of file utils.c.

Referenced by estimate_timings().

static void estimate_timings	(	AVFormatContext *	ic,
		int64_t	old_offset
	)

static

Definition at line 2520 of file utils.c.

Referenced by avformat_find_stream_info().

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

static

Definition at line 2567 of file utils.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

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

static

Definition at line 2614 of file utils.c.

Referenced by avformat_find_stream_info().

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

Definition at line 2695 of file utils.c.

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

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.

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 2717 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().

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

Definition at line 2761 of file utils.c.

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

Definition at line 2769 of file utils.c.

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

Definition at line 2786 of file utils.c.

static void compute_chapters_end ( AVFormatContext * s )

static

Definition at line 2797 of file utils.c.

Referenced by avformat_find_stream_info().

static int get_std_framerate ( int i )

static

Definition at line 2821 of file utils.c.

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

static int tb_unreliable ( AVCodecContext * c )

static

Definition at line 2835 of file utils.c.

Referenced by avformat_find_stream_info(), and ff_rfps_calculate().

int ff_alloc_extradata	(	AVCodecContext *	avctx,
		int	size
	)

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

Parameters

size	size of extradata

Returns: 0 if OK, AVERROR_xxx on error

Definition at line 2855 of file utils.c.

Referenced by afc_read_header(), ape_read_header(), avformat_find_stream_info(), celt_header(), dfa_read_header(), encode_intervals(), ff_generate_avci_extradata(), ff_get_extradata(), ff_parse_mpeg2_descriptor(), flac_header(), flv_set_video_codec(), matroska_read_header(), mov_create_chapter_track(), mxf_parse_structural_metadata(), nut_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(), 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(), and yop_read_header().

int ff_get_extradata	(	AVCodecContext *	avctx,
		AVIOContext *	pb,
		int	size
	)

Allocate extradata with additional FF_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 2875 of file utils.c.

Referenced by adx_read_header(), aiff_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(), ffm2_read_header(), ffm_read_header(), flv_get_extradata(), get_codec_data(), idcin_read_header(), mov_parse_stsd_data(), 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(), vc1t_read_header(), and wsvqa_read_header().

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 2891 of file utils.c.

Referenced by avformat_find_stream_info(), and mov_build_index().

void ff_rfps_calculate ( AVFormatContext * ic )

Definition at line 2949 of file utils.c.

Referenced by avformat_find_stream_info(), and mov_read_header().

void ff_free_stream	(	AVFormatContext *	s,
		AVStream *	st
	)

Definition at line 3509 of file utils.c.

Referenced by avformat_free_context(), and ff_rm_read_mdpr_codecdata().

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

Add a new chapter.

Parameters

s	media file handle
id	unique ID for this chapter
start	chapter start time in time_base units
end	chapter end time in time_base units
title	chapter title

Returns: AVChapter or NULL on error

Definition at line 3694 of file utils.c.

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

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

Definition at line 3719 of file utils.c.

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

static

Definition at line 3747 of file utils.c.

Referenced by dump_stream_format().

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

static

Definition at line 3758 of file utils.c.

Referenced by av_dump_format(), and dump_stream_format().

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

static

Definition at line 3785 of file utils.c.

Referenced by av_dump_format().

uint64_t ff_ntp_time ( void )

Get the current time since NTP epoch in microseconds.

Definition at line 3931 of file utils.c.

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

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

static

Definition at line 3997 of file utils.c.

Referenced by av_hex_dump(), and av_hex_dump_log().

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

static

Definition at line 4034 of file utils.c.

Referenced by av_pkt_dump2(), and av_pkt_dump_log2().

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

Definition at line 4140 of file utils.c.

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

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

Parse a string of hexadecimal strings.

Any space between the hexadecimal digits is ignored.

Parameters

data	if non-null, the parsed data is written to this pointer
p	the string to parse

Returns: the number of bytes written (or to be written, if data is null)

Definition at line 4161 of file utils.c.

Referenced by parse_fmtp_config(), and parse_playlist().

void avpriv_set_pts_info	(	AVStream *	s,
		int	pts_wrap_bits,
		unsigned int	pts_num,
		unsigned int	pts_den
	)

Set the time base and wrapping info for a given stream.

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

Parameters

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

Definition at line 4197 of file utils.c.

Referenced by add_av_stream1(), adp_read_header(), adts_aac_read_header(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), amr_read_header(), ape_read_header(), aqt_read_header(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_sdp_line(), ass_read_header(), ast_read_header(), audio_read_header(), audio_write_header(), avformat_new_stream(), avi_read_header(), avi_write_header(), avr_read_header(), bfi_read_header(), bmv_read_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), create_audio_stream(), create_new_audio_stream(), create_stream(), dc1394_read_common(), decklink_setup_audio(), decklink_setup_video(), decode_stream_header(), dfa_read_header(), dirac_header(), dshow_add_device(), dv_extract_audio_info(), dv_extract_video_info(), dxa_read_header(), ea_read_header(), epaf_read_header(), fbdev_read_header(), ff_framehash_write_header(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), ff_voc_get_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_header(), flac_read_header(), flv_write_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_packet_header(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), gxf_header(), gxf_write_header(), hls_read_header(), hnm_read_header(), idcin_read_header(), iff_read_header(), ilbc_read_header(), img_read_header(), init_stream(), ipmovie_read_header(), ircam_read_header(), iss_read_header(), jacosub_read_header(), lavfi_read_header(), libquvi_read_header(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_read_trak(), mov_write_header(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_parse_structural_metadata(), mxf_write_header(), mxg_read_header(), nc_read_header(), new_stream(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_new_stream(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), opus_header(), parse_audio_var(), parse_strk(), parse_video_var(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pulse_read_header(), pulse_write_header(), pva_read_header(), pvf_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), rawvideo_read_header(), read_frame(), read_gab2_sub(), read_header(), read_header_gme(), read_sl_header(), realtext_read_header(), redspark_read_header(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rsd_read_header(), rso_read_header(), sami_read_header(), sbg_read_header(), sdr2_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(), vp8_header(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), webvtt_write_header(), write_header(), write_stream_data(), wsaud_read_header(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

void ff_parse_key_value	(	const char *	str,
		ff_parse_key_val_cb	callback_get_buf,
		void *	context
	)

Parse a string with comma-separated key=value pairs.

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

Parameters

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

Definition at line 4222 of file utils.c.

Referenced by ff_http_auth_handle_header(), and parse_playlist().