aom_codec.h File Reference

Describes the codec algorithm interface to applications. More...

#include "aom/aom_image.h"
#include "aom/aom_integer.h"

Go to the source code of this file.

Data Structures
struct	aom_codec_ctx
	Codec context structure. More...

Macros
#define	AOM_DEPRECATED
	Decorator indicating a function is deprecated.
#define	AOM_DECLSPEC_DEPRECATED
	Decorator indicating a function is deprecated.
#define	AOM_UNUSED
	Decorator indicating a function is potentially unused.
#define	ATTRIBUTE_PACKED
	Decorator indicating that given struct/union/enum is packed.
#define	AOM_CODEC_ABI_VERSION
	Current ABI version number.
#define	AOM_CODEC_CAP_DECODER   0x1
#define	AOM_CODEC_CAP_ENCODER   0x2
#define	AOM_CODEC_USE_EXPERIMENTAL   0x1
#define	AOM_FRAME_IS_KEY   0x1u
#define	AOM_FRAME_IS_DROPPABLE   0x2u
	frame can be dropped without affecting the stream (no future frame depends on this one)
#define	AOM_FRAME_IS_INTRAONLY   0x10u
	this is an INTRA_ONLY frame
#define	AOM_FRAME_IS_SWITCH   0x20u
	this is an S-frame
#define	AOM_FRAME_IS_ERROR_RESILIENT   0x40u
	this is an error-resilient frame
#define	AOM_FRAME_IS_DELAYED_RANDOM_ACCESS_POINT   0x80u
	this is a key-frame dependent recovery-point frame
#define	aom_codec_version_major()
	Return the major version number.
#define	aom_codec_version_minor()
	Return the minor version number.
#define	aom_codec_version_patch()
	Return the patch version number.

Typedefs
typedef long	aom_codec_caps_t
	Codec capabilities bitfield.
typedef long	aom_codec_flags_t
	Initialization-time Feature Enabling.
typedef int64_t	aom_codec_pts_t
	Time Stamp Type.
typedef const struct aom_codec_iface	aom_codec_iface_t
	Codec interface structure.
typedef struct aom_codec_priv	aom_codec_priv_t
	Codec private data structure.
typedef uint32_t	aom_codec_frame_flags_t
	Compressed Frame Flags.
typedef const void *	aom_codec_iter_t
	Iterator.
typedef struct aom_codec_ctx	aom_codec_ctx_t
	Codec context structure.
typedef enum aom_bit_depth	aom_bit_depth_t
	Bit depth for codec This enumeration determines the bit depth of the codec.
typedef enum aom_superblock_size	aom_superblock_size_t
	Superblock size selection.

Enumerations
enum	aom_codec_err_t {   AOM_CODEC_OK , AOM_CODEC_ERROR , AOM_CODEC_MEM_ERROR , AOM_CODEC_ABI_MISMATCH ,   AOM_CODEC_INCAPABLE , AOM_CODEC_UNSUP_BITSTREAM , AOM_CODEC_UNSUP_FEATURE , AOM_CODEC_CORRUPT_FRAME ,   AOM_CODEC_INVALID_PARAM , AOM_CODEC_LIST_END }
	Algorithm return codes. More...
enum	aom_bit_depth { AOM_BITS_8 = 8 , AOM_BITS_10 = 10 , AOM_BITS_12 = 12 }
	Bit depth for codec This enumeration determines the bit depth of the codec. More...
enum	aom_superblock_size { AOM_SUPERBLOCK_SIZE_64X64 , AOM_SUPERBLOCK_SIZE_128X128 , AOM_SUPERBLOCK_SIZE_DYNAMIC }
	Superblock size selection. More...
enum	OBU_TYPE {   OBU_SEQUENCE_HEADER = 1 , OBU_TEMPORAL_DELIMITER = 2 , OBU_FRAME_HEADER = 3 , OBU_TILE_GROUP = 4 ,   OBU_METADATA = 5 , OBU_FRAME = 6 , OBU_REDUNDANT_FRAME_HEADER = 7 , OBU_TILE_LIST = 8 ,   OBU_PADDING = 15 }
	OBU types.
enum	OBU_METADATA_TYPE {   OBU_METADATA_TYPE_AOM_RESERVED_0 = 0 , OBU_METADATA_TYPE_HDR_CLL = 1 , OBU_METADATA_TYPE_HDR_MDCV = 2 , OBU_METADATA_TYPE_SCALABILITY = 3 ,   OBU_METADATA_TYPE_ITUT_T35 = 4 , OBU_METADATA_TYPE_TIMECODE = 5 }
	OBU metadata types.

Functions
int	aom_codec_version (void)
	Return the version information (as an integer)
const char *	aom_codec_version_str (void)
	Return the version information (as a string)
const char *	aom_codec_version_extra_str (void)
	Return the version information (as a string)
const char *	aom_codec_build_config (void)
	Return the build configuration.
const char *	aom_codec_iface_name (aom_codec_iface_t *iface)
	Return the name for a given interface.
const char *	aom_codec_err_to_string (aom_codec_err_t err)
	Convert error number to printable string.
const char *	aom_codec_error (const aom_codec_ctx_t *ctx)
	Retrieve error synopsis for codec context.
const char *	aom_codec_error_detail (const aom_codec_ctx_t *ctx)
	Retrieve detailed error information for codec context.
aom_codec_err_t	aom_codec_destroy (aom_codec_ctx_t *ctx)
	Destroy a codec instance.
aom_codec_caps_t	aom_codec_get_caps (aom_codec_iface_t *iface)
	Get the capabilities of an algorithm.
const char *	aom_obu_type_to_string (OBU_TYPE type)
	Returns string representation of OBU_TYPE.

Codec Control
The aom_codec_control function exchanges algorithm specific data with the codec instance. Additionally, the macro AOM_CODEC_CONTROL_TYPECHECKED is provided, which will type-check the parameter against the control ID before calling aom_codec_control - note that this macro requires the control ID to be directly encoded in it, e.g., AOM_CODEC_CONTROL_TYPECHECKED(&ctx, AOME_SET_CPUUSED, 8). The codec control IDs can be found in aom.h, aomcx.h, and aomdx.h (defined as aom_com_control_id, aome_enc_control_id, and aom_dec_control_id).
#define	AOM_CODEC_CONTROL_TYPECHECKED(ctx, id, data)
	aom_codec_control wrapper macro (adds type-checking, less flexible)
#define	AOM_CTRL_USE_TYPE(id, typ)
	Creates type checking mechanisms for aom_codec_control.
aom_codec_err_t	aom_codec_control (aom_codec_ctx_t *ctx, int ctrl_id,...)
	Algorithm Control.
aom_codec_err_t	aom_codec_set_option (aom_codec_ctx_t *ctx, const char *name, const char *value)
	Key & Value API.

Detailed Description

Describes the codec algorithm interface to applications.

This file describes the interface between an application and a video codec algorithm.

An application instantiates a specific codec instance by using aom_codec_dec_init() or aom_codec_enc_init() and a pointer to the algorithm's interface structure:

    my_app.c:
      extern aom_codec_iface_t my_codec;
      {
          aom_codec_ctx_t algo;
          int threads = 4;
          aom_codec_dec_cfg_t cfg = { threads, 0, 0, 1 };
          res = aom_codec_dec_init(&algo, &my_codec, &cfg, 0);
      }
    

Once initialized, the instance is managed using other functions from the aom_codec_* family.