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Modules

Preprocessor String Macros

Library Version Macros

AVPicture types, pixel formats and basic image planes manipulation.

Version and Build diagnostics

Macros and function useful to check at compiletime and at runtime which version of libavutil is in use.

Media Type.

Macros

#define av_int_list_length(list, term) av_int_list_length_for_size(sizeof(*(list)), list, term)

Compute the length of an integer list. More...

#define AV_FOURCC_MAX_STRING_SIZE 32

#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)

Enumerations

enum AVMediaType {
AVMEDIA_TYPE_UNKNOWN = -1, AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA,
AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_ATTACHMENT, AVMEDIA_TYPE_NB
}

Functions

const char * av_get_media_type_string (enum AVMediaType media_type)

Return a string describing the media_type enum, NULL if media_type is unknown. More...

static void * av_x_if_null (const void *p, const void *x)

Return x default pointer in case p is NULL. More...

unsigned av_int_list_length_for_size (unsigned elsize, const void *list, uint64_t term) av_pure

Compute the length of an integer list. More...

AVRational av_get_time_base_q (void)

Return the fractional representation of the internal time base. More...

char * av_fourcc_make_string (char *buf, uint32_t fourcc)

Fill the provided buffer with a string containing a FourCC (four-character code) representation. More...

Detailed Description

Macro Definition Documentation

◆ av_int_list_length

#define av_int_list_length ( list,

term

) av_int_list_length_for_size(sizeof(*(list)), list, term)

Compute the length of an integer list.

Parameters: term list terminator (usually 0 or -1)

list pointer to the list

Returns: length of the list, in elements, not counting the terminator

Definition at line 335 of file avutil.h.

◆ AV_FOURCC_MAX_STRING_SIZE

#define AV_FOURCC_MAX_STRING_SIZE 32

Definition at line 343 of file avutil.h.

◆ av_fourcc2str

#define av_fourcc2str ( fourcc ) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)

Definition at line 345 of file avutil.h.

Enumeration Type Documentation

◆ AVMediaType

enum AVMediaType

Enumerator
AVMEDIA_TYPE_UNKNOWN	Usually treated as AVMEDIA_TYPE_DATA.
AVMEDIA_TYPE_VIDEO
AVMEDIA_TYPE_AUDIO
AVMEDIA_TYPE_DATA	Opaque data information usually continuous.
AVMEDIA_TYPE_SUBTITLE
AVMEDIA_TYPE_ATTACHMENT	Opaque data information usually sparse.
AVMEDIA_TYPE_NB

Definition at line 199 of file avutil.h.

Function Documentation

◆ av_get_media_type_string()

const char* av_get_media_type_string ( enum AVMediaType media_type )

Return a string describing the media_type enum, NULL if media_type is unknown.

Examples: demux_decode.c, and extract_mvs.c.

Definition at line 28 of file utils.c.

Referenced by avcodec_string(), avfilter_link(), avi_write_header(), choose_encoder(), create_streams(), demux_final_stats(), demux_stream_alloc(), encode_frame(), ff_framehash_write_header(), fg_thread_set_name(), find_matching_stream(), find_stream(), flv_init(), get_type_string(), graph_check_validity(), ifilter_bind_dec(), ifilter_bind_fg(), ifilter_bind_ist(), init_muxer(), init_simple_filtergraph(), input_packet_process(), log_slave(), map_manual(), mov_read_kind(), mpeg_mux_init(), mux_final_stats(), mux_stream_alloc(), mxf_add_metadata_stream(), ofilter_alloc(), open_codec_context(), ost_add(), packet_decode(), read_thread(), report_new_stream(), seg_init(), show_frame(), show_packet(), show_stream(), stream_cycle_channel(), stream_specifier_parse(), and write_frame().

◆ av_x_if_null()

static void* av_x_if_null ( const void * p,

const void * x

)

inlinestatic

Return x default pointer in case p is NULL.

Examples: decode_filter_audio.c.

Definition at line 312 of file avutil.h.

Referenced by activate(), avfilter_link(), avi_write_header(), compact_print_section_header(), data_open(), default_print_section_header(), device_try_init(), ff_print_pts(), ff_print_time(), ftp_connect(), get_frame_side_data_type(), get_packet_side_data_type(), get_stream_group_type(), init(), init_filters(), init_report(), log_default(), match_section(), opt_get_elem(), parse_script(), print_link_prop(), show_stream_group(), and video_thread().

◆ av_int_list_length_for_size()

unsigned av_int_list_length_for_size ( unsigned elsize,

const void * list,

uint64_t term

)

Compute the length of an integer list.

Parameters: elsize size in bytes of each list element (only 1, 2, 4 or 8)

term list terminator (usually 0 or -1)

list pointer to the list

Returns: length of the list, in elements, not counting the terminator

Definition at line 54 of file utils.c.

◆ av_get_time_base_q()

AVRational av_get_time_base_q ( void )

Return the fractional representation of the internal time base.

Definition at line 96 of file utils.c.

◆ av_fourcc_make_string()

char* av_fourcc_make_string ( char * buf,

uint32_t fourcc

)

Fill the provided buffer with a string containing a FourCC (four-character code) representation.

Parameters: buf a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE

fourcc the fourcc to represent

Returns: the buffer in input

Definition at line 73 of file utils.c.

Referenced by ff_decklink_read_header(), and mov_read_udta_string().

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