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Modules | Macros | Enumerations | Functions

Other

Common utility functions

Modules

Not exported functions, for internal usage only.

Preprocessor String Macros

String manipulation macros.

Library Version Macros

Useful to check and match library version in order to maintain backward compatibility.

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.

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.

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

Return x default pointer in case p is NULL.

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

Compute the length of an integer list.

FILE * av_fopen_utf8 (const char *path, const char *mode)

Open a file using a UTF-8 filename.

AVRational av_get_time_base_q (void)

Return the fractional representation of the internal time base.

Detailed Description

Macro Definition Documentation

#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 324 of file avutil.h.

Enumeration Type Documentation

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 192 of file avutil.h.

Function Documentation

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:: demuxing_decoding.c.

Definition at line 72 of file utils.c.

Referenced by avcodec_string(), avfilter_link(), avi_write_header(), check_streamcopy_filters(), describe_frame_to_str(), find_stream(), flv_write_header(), graph_check_validity(), log_slave(), open_codec_context(), open_output_file(), process_input(), report_new_stream(), seg_write_header(), show_frame(), show_packet(), show_stream(), stream_cycle_channel(), and write_frame().

static void* av_x_if_null ( const void * p,

const void * x

)

inlinestatic

Return x default pointer in case p is NULL.

Examples:: filtering_audio.c.

Definition at line 301 of file avutil.h.

Referenced by av_opt_get(), avcodec_open2(), avfilter_link(), avi_write_header(), compact_print_section_header(), data_open(), default_print_section_header(), device_try_init(), filter_frame(), init(), init_dict(), init_filters(), init_report(), init_video(), match_section(), opt_list(), parse_script(), print_link_prop(), and video_thread().

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 98 of file utils.c.

FILE* av_fopen_utf8 ( const char * path,

const char * mode

)

Open a file using a UTF-8 filename.

The API of this function matches POSIX fopen(), errors are returned through errno.

Definition at line 97 of file file_open.c.

Referenced by cmdutils_read_file(), and transcode_init().

AVRational av_get_time_base_q ( void )

Return the fractional representation of the internal time base.

Definition at line 117 of file utils.c.

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