Other

Topics
	Preprocessor String Macros
	Library Version Macros
	Constants
	Image related
	AVPicture types, pixel formats and basic image planes manipulation.
	Version and Build diagnostics
	Macros and function useful to check at compile time and at runtime which version of libavutil is in use.
	Media Type
	Media Type

Macros
#define	AV_FOURCC_MAX_STRING_SIZE   32
#define	av_fourcc2str(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.
static void *	av_x_if_null (const void *p, const void *x)
	Return x default pointer in case p is NULL.
AVRational	av_get_time_base_q (void)
	Return the fractional representation of the internal time base.
char *	av_fourcc_make_string (char *buf, uint32_t fourcc)
	Fill the provided buffer with a string containing a FourCC (four-character code) representation.

Detailed Description

Macro Definition Documentation

AV_FOURCC_MAX_STRING_SIZE

#define AV_FOURCC_MAX_STRING_SIZE   32

Definition at line 321 of file avutil.h.

Referenced by av_fourcc_make_string(), ff_decklink_read_header(), and mov_read_udta_string().

av_fourcc2str

#define av_fourcc2str

(

fourcc

)

Value:

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

Definition at line 323 of file avutil.h.

Referenced by apng_read_packet(), avcodec_string(), avi_read_header(), control_port_cb(), decode_frame(), decode_frame(), decode_frame_common(), dxa_read_packet(), ff_guid_str_buf(), ff_make_codec_str(), ff_mov_read_stsd_entries(), ff_v4l2_context_init(), ffmmal_init_decoder(), ffmmal_read_frame(), get_aiff_header(), hxvs_build_index(), hxvs_read_header(), init_muxer(), main(), mjpeg_decode_app(), mov_parse_stsd_audio(), mov_parse_stsd_video(), mov_read_default(), mov_read_eyes(), mov_read_hdlr(), mov_read_infe(), mov_read_iprp(), mov_read_iref(), mov_read_iref_cdsc(), mov_read_iref_dimg(), mov_read_pack(), mov_read_pcmc(), mov_read_sbgp(), mov_read_sv3d(), mov_read_vexu(), mov_read_vexu_proj(), mov_write_hdlr_tag(), mov_write_subtitle_tag(), oma_write_header(), parse_dsd_prop(), parse_pixel_format(), print_pix_fmt_fourccs(), read_header(), rm_read_header(), rpl_read_header(), rsd_read_header(), scan_file(), show_stream(), v4l2_configure_contexts(), vqa_decode_frame_hicolor(), vqa_decode_frame_pal8(), vt_map_frame(), wc3_read_header(), wc3_read_packet(), webp_anim_read_header(), webp_anim_read_packet(), webp_decode_frame(), wsvqa_read_header(), wsvqa_read_packet(), and xwma_read_header().

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 198 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(), dshow_cycle_devices(), encode_frame(), ff_framehash_write_header(), fg_complex_bind_input(), fg_create_simple(), 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(), 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(), open_codec_context(), ost_add(), packet_decode(), print_filter(), print_filtergraph_single(), print_link(), print_streams(), 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.

Definition at line 311 of file avutil.h.

Referenced by activate(), activate(), av_bsf_source_add_packet(), av_buffersrc_add_frame_flags(), 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(), init_filters(), init_report(), log_default(), match_section(), opt_get_elem(), parse_script(), print_link(), print_link_prop(), show_stream_group(), and video_thread().

av_get_time_base_q()

AVRational av_get_time_base_q

(

void

)

Return the fractional representation of the internal time base.

Definition at line 77 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 54 of file utils.c.

Referenced by ff_decklink_read_header(), and mov_read_udta_string().