Mix Presentation

Data Structures
struct	AVIAMFSubmixElement
	Submix element as defined in section 3.7 of IAMF. More...
struct	AVIAMFSubmixLayout
	Submix layout as defined in section 3.7.6 of IAMF. More...
struct	AVIAMFSubmix
	Submix layout as defined in section 3.7 of IAMF. More...
struct	AVIAMFMixPresentation
	Information on how to render and mix one or more AVIAMFAudioElement to generate the final audio output, as defined in section 3.7 of IAMF. More...

Enumerations
enum	AVIAMFHeadphonesMode { AV_IAMF_HEADPHONES_MODE_STEREO, AV_IAMF_HEADPHONES_MODE_BINAURAL }
enum	AVIAMFSubmixLayoutType { AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS = 2, AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL = 3 }

Functions
const AVClass *	av_iamf_mix_presentation_get_class (void)
AVIAMFMixPresentation *	av_iamf_mix_presentation_alloc (void)
	Allocates a AVIAMFMixPresentation, and initializes its fields with default values. More...
AVIAMFSubmix *	av_iamf_mix_presentation_add_submix (AVIAMFMixPresentation *mix_presentation)
	Allocate a submix and add it to a given AVIAMFMixPresentation. More...
AVIAMFSubmixElement *	av_iamf_submix_add_element (AVIAMFSubmix *submix)
	Allocate a submix element and add it to a given AVIAMFSubmix. More...
AVIAMFSubmixLayout *	av_iamf_submix_add_layout (AVIAMFSubmix *submix)
	Allocate a submix layout and add it to a given AVIAMFSubmix. More...
void	av_iamf_mix_presentation_free (AVIAMFMixPresentation **mix_presentation)
	Free an AVIAMFMixPresentation and all its contents. More...

Detailed Description

Mix Presentations as defined in section 3.7 of IAMF.

Enumeration Type Documentation

AVIAMFHeadphonesMode

enum AVIAMFHeadphonesMode

Enumerator
AV_IAMF_HEADPHONES_MODE_STEREO	The referenced Audio Element shall be rendered to stereo loudspeakers.
AV_IAMF_HEADPHONES_MODE_BINAURAL	The referenced Audio Element shall be rendered with a binaural renderer.

Definition at line 429 of file iamf.h.

AVIAMFSubmixLayoutType

enum AVIAMFSubmixLayoutType

Enumerator
AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS	The layout follows the loudspeaker sound system convention of ITU-2051-3.
AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL	The layout is binaural.

Definition at line 493 of file iamf.h.

Function Documentation

av_iamf_mix_presentation_get_class()

const AVClass* av_iamf_mix_presentation_get_class

(

void

)

Definition at line 515 of file iamf.c.

Referenced by stream_group_child_iterate().

av_iamf_mix_presentation_alloc()

AVIAMFMixPresentation* av_iamf_mix_presentation_alloc

(

void

)

Allocates a AVIAMFMixPresentation, and initializes its fields with default values.

No submixes are allocated. Must be freed with av_iamf_mix_presentation_free().

See also

av_iamf_mix_presentation_add_submix()

Definition at line 520 of file iamf.c.

Referenced by avformat_stream_group_create(), and mix_presentation_obu().

av_iamf_mix_presentation_add_submix()

AVIAMFSubmix* av_iamf_mix_presentation_add_submix

(

AVIAMFMixPresentation *

mix_presentation

)

Allocate a submix and add it to a given AVIAMFMixPresentation.

It is freed by av_iamf_mix_presentation_free() alongside the rest of the parent AVIAMFMixPresentation.

Returns

a pointer to the allocated submix.

Referenced by mix_presentation_obu(), and of_parse_iamf_submixes().

av_iamf_submix_add_element()

AVIAMFSubmixElement* av_iamf_submix_add_element

(

AVIAMFSubmix *

submix

)

Allocate a submix element and add it to a given AVIAMFSubmix.

It is freed by av_iamf_mix_presentation_free() alongside the rest of the parent AVIAMFSubmix.

Returns

a pointer to the allocated submix.

Referenced by mix_presentation_obu(), and of_parse_iamf_submixes().

av_iamf_submix_add_layout()

AVIAMFSubmixLayout* av_iamf_submix_add_layout

(

AVIAMFSubmix *

submix

)

Allocate a submix layout and add it to a given AVIAMFSubmix.

It is freed by av_iamf_mix_presentation_free() alongside the rest of the parent AVIAMFSubmix.

Returns

a pointer to the allocated submix.

Referenced by mix_presentation_obu(), and of_parse_iamf_submixes().

av_iamf_mix_presentation_free()

void av_iamf_mix_presentation_free

(

AVIAMFMixPresentation **

mix_presentation

)

Free an AVIAMFMixPresentation and all its contents.

Parameters

mix_presentation

pointer to pointer to an allocated AVIAMFMixPresentation. upon return, *mix_presentation will be set to NULL.

Definition at line 534 of file iamf.c.

Referenced by ff_free_stream_group(), ff_iamf_free_mix_presentation(), and iamf_read_header().