public final class AudioUnitRenderActionFlags
extends java.lang.Object
These flags can be set in a callback from an audio unit during an audio unit render operation from either the RenderNotify Proc or the render input callback.
[@constant] kAudioUnitRenderAction_PreRender Called on a render notification Proc - which is called either before or after the render operation of the audio unit. If this flag is set, the proc is being called before the render operation is performed.
[@constant] kAudioUnitRenderAction_PostRender Called on a render notification Proc - which is called either before or after the render operation of the audio unit. If this flag is set, the proc is being called after the render operation is completed.
[@constant] kAudioUnitRenderAction_OutputIsSilence The originator of a buffer, in a render input callback, or in an audio unit's render operation, may use this flag to indicate that the buffer contains only silence.
The receiver of the buffer can then use the flag as a hint as to whether the buffer needs to be processed or not.
Note that because the flag is only a hint, when setting the silence flag, the originator of a buffer must also ensure that it contains silence (zeroes).
[@constant] kAudioOfflineUnitRenderAction_Preflight This is used with offline audio units (of type 'auol'). It is used when an offline unit is being preflighted, which is performed prior to the actual offline rendering actions are performed. It is used for those cases where the offline process needs it (for example, with an offline unit that normalises an audio file, it needs to see all of the audio data first before it can perform its normalization)
[@constant] kAudioOfflineUnitRenderAction_Render Once an offline unit has been successfully preflighted, it is then put into its render mode. So this flag is set to indicate to the audio unit that it is now in that state and that it should perform its processing on the input data.
[@constant] kAudioOfflineUnitRenderAction_Complete This flag is set when an offline unit has completed either its preflight or performed render operations
[@constant] kAudioUnitRenderAction_PostRenderError If this flag is set on the post-render call an error was returned by the AUs render operation. In this case, the error can be retrieved through the lastRenderError property and the audio data in ioData handed to the post-render notification will be invalid. [@constant] kAudioUnitRenderAction_DoNotCheckRenderArgs If this flag is set, then checks that are done on the arguments provided to render are not performed. This can be useful to use to save computation time in situations where you are sure you are providing the correct arguments and structures to the various render calls
| Modifier and Type | Field and Description |
|---|---|
static int |
OfflineUnitRenderAction_Complete |
static int |
OfflineUnitRenderAction_Preflight |
static int |
OfflineUnitRenderAction_Render |
static int |
UnitRenderAction_DoNotCheckRenderArgs |
static int |
UnitRenderAction_OutputIsSilence |
static int |
UnitRenderAction_PostRender |
static int |
UnitRenderAction_PostRenderError |
static int |
UnitRenderAction_PreRender |
public static final int UnitRenderAction_PreRender
public static final int UnitRenderAction_PostRender
public static final int UnitRenderAction_OutputIsSilence
public static final int OfflineUnitRenderAction_Preflight
public static final int OfflineUnitRenderAction_Render
public static final int OfflineUnitRenderAction_Complete
public static final int UnitRenderAction_PostRenderError
public static final int UnitRenderAction_DoNotCheckRenderArgs