channel_element_type,

channel_element_reference_type, channel_element_const_reference_type, get_channel, contains_channel More...

Classes
struct	psynth::sound::contains_channel< ChannelBase, Channel >
	A predicate metafunction determining whether a given channel base contains a given channel. More...
struct	psynth::sound::channel_element_type< ChannelBase, Channel >
	Specifies the type of the element associated with a given channel tag. More...
struct	psynth::sound::channel_element_reference_type< ChannelBase, Channel >
	Specifies the return type of the mutable element accessor by channel name, get_channel(channel_base, Channel());. More...
struct	psynth::sound::channel_element_const_reference_type< ChannelBase, Channel >
	Specifies the return type of the constant element accessor by channel name, get_channel(channel_base, Channel());. More...
Functions
template<typename ChannelBase , typename Channel >
channel_element_reference_type < ChannelBase, Channel >::type	psynth::sound::get_channel (ChannelBase &cb, Channel=Channel())
	Mutable accessor to the element associated with a given channel name.
template<typename ChannelBase , typename Channel >
channel_element_const_reference_type < ChannelBase, Channel >::type	psynth::sound::get_channel (const ChannelBase &cb, Channel=Channel())
	Constant accessor to the element associated with a given channel name.

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Detailed Description

channel_element_reference_type, channel_element_const_reference_type, get_channel, contains_channel

Support for accessing the elements of a channel base by channel name

Example: A function that takes a generic frame containing a red sample and sets it to 100%:

   template <typename Frame>
   void set_red_to_max(Frame& frame) {
       boost::function_requires<MutableFrameConcept<Frame> >();
       BOOST_STATIC_ASSERT((contains_channel<Frame, red_t>::value));

       typedef typename channel_element_type<Frame, red_t>::type red_sample_t;
       get_channel(frame, red_t()) = sample_traits<red_sample_t>::max_value(); 
   }

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Function Documentation

template<typename ChannelBase , typename Channel >

channel_element_reference_type<ChannelBase,Channel>::type psynth::sound::get_channel	(	ChannelBase &	cb,
		Channel	= Channel()
	)

Mutable accessor to the element associated with a given channel name.

template<typename ChannelBase , typename Channel >

channel_element_const_reference_type<ChannelBase,Channel>::type psynth::sound::get_channel	(	const ChannelBase &	cb,
		Channel	= Channel()
	)

Constant accessor to the element associated with a given channel name.