fame_register

NAME

fame_register - register an object to the library

SYNOPSIS

#include <fame.h>

void fame_register(fame_context_t *context, char const *type, fame_object_t *object);

DESCRIPTION

fame_register() is used to register an object to the library and associate a type with it. Upon initialisation with fame_init , libfame looks for the fame_profile_t object associated with the "profile" type and calls its 'init' function. Then this object may get other objects through fame_get_object , and so on. Thus, fame_register enables the use of objects from the application inside the library, and can be used to change or extend the default behaviour of the library.

context is the context handle previously returned by fame_open

type is a type identifier to be associated with the object for further retrieval through fame_get_object.

object is the object to associate with type

BUILTIN OBJECTS

Currently the built-in objects and their default associations are:

fame_profile_t* profile,profile/mpeg1

MPEG-1 profile, uses "syntax/mpeg1", "encoder/mpeg" and "motion"

fame_profile_t* profile/mpeg4,profile/mpeg4/simple

MPEG-4 simple profile, uses "syntax/mpeg4", "encoder/mpeg" and "motion"

fame_profile_t* profile/mpeg4/shape

MPEG-4 shape profile, uses "syntax/mpeg4", "encoder/mpeg", "shape" and "motion"

fame_syntax_t* syntax,syntax/mpeg1

MPEG-1 bitstream syntax

fame_syntax_t* syntax/mpeg4

MPEG-4 bitstream syntax

fame_encoder_t* encoder,encoder/mpeg

MPEG encoder

fame_motion_t* motion,motion/none

null motion estimation

fame_motion_t* motion,motion/fourstep

four step motion estimation

fame_motion_t* motion,motion/pmvfast

pmvfast motion estimation

fame_rate_t* rate

simple rate control

fame_shape_t* shape

shape coder

EXAMPLES

{ fame_object_t *object; object = fame_get_object(fc, "profile/mpeg4/simple"); if(object) fame_register(fc, "profile", object); }

will try to get the object associated with "profile/mpeg4/simple" and register it for the "profile" type as well. This piece of code, called just after fame_open and just before fame_init would effectively have libfame produce MPEG-4 output instead of default MPEG-1.

int my_encode(fame_profile_t *profile, fame_yuv_t *yuv, unsigned char *shape) { printf("Hello world!"); } { fame_profile_t *my_profile; my_profile = FAME_PROFILE(fame_get_object(fc, "profile")); my_profile->encode = my_encode; }

will overide the default profile 'encode' function with this one printing "Hello world!" :)