Data Structures
struct	AVDownmixInfo
	This structure describes optional metadata relevant to a downmix procedure. More...

Enumerations
enum	AVDownmixType { AV_DOWNMIX_TYPE_UNKNOWN , AV_DOWNMIX_TYPE_LORO , AV_DOWNMIX_TYPE_LTRT , AV_DOWNMIX_TYPE_DPLII , AV_DOWNMIX_TYPE_NB }
	Possible downmix types. More...

Functions
AVDownmixInfo *	av_downmix_info_update_side_data (AVFrame *frame)
	Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing. More...

Detailed Description

Enumeration Type Documentation

Possible downmix types.

Enumerator
AV_DOWNMIX_TYPE_UNKNOWN	Not indicated.
AV_DOWNMIX_TYPE_LORO	Lo/Ro 2-channel downmix (Stereo).
AV_DOWNMIX_TYPE_LTRT	Lt/Rt 2-channel downmix, Dolby Surround compatible.
AV_DOWNMIX_TYPE_DPLII	Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible.
AV_DOWNMIX_TYPE_NB	Number of downmix types. Not part of ABI.

Definition at line 44 of file downmix_info.h.

AVDownmixInfo * av_downmix_info_update_side_data ( AVFrame * frame )

Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.

If the side data is absent, it is created and added to the frame.

Parameters

frame the frame for which the side data is to be obtained or created

Returns: the AVDownmixInfo structure to be edited by the caller, or NULL if the structure cannot be allocated.