/[svn]/linuxsampler/trunk/src/drivers/audio/AudioOutputDevice.h
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Diff of /linuxsampler/trunk/src/drivers/audio/AudioOutputDevice.h

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revision 2409 by iliev, Sun Jul 3 18:06:51 2011 UTC revision 2410 by schoenebeck, Sat Feb 2 18:52:15 2013 UTC
# Line 181  namespace LinuxSampler { Line 181  namespace LinuxSampler {
181               * AcquireChannels(). Each driver must implement it.               * AcquireChannels(). Each driver must implement it.
182               */               */
183              virtual AudioChannel* CreateChannel(uint ChannelNr) = 0;              virtual AudioChannel* CreateChannel(uint ChannelNr) = 0;
184            
185                /**
186                 * Might be optionally implemented by the deriving driver. If
187                 * implemented, this method will return the current audio
188                 * latency in seconds. The driver might measure the actual
189                 * latency with timing functions to return the real latency.
190                 *
191                 * If this method is not implemented / overridden by the
192                 * descending driver, it will simply return the theoretical
193                 * latency, that is MaxSamplesPerCycle() / SampleRate().
194                 *
195                 * Currently this method is not used by the sampler itself.
196                 * It can be used however for GUIs built on top of the sampler
197                 * for example, to i.e. display the user the currently
198                 * effective audio latency in real-time.
199                 */
200                virtual float latency();
201    
202    
203    
# Line 206  namespace LinuxSampler { Line 223  namespace LinuxSampler {
223               * @param pEngine - sampler engine               * @param pEngine - sampler engine
224               */               */
225              void Disconnect(Engine* pEngine);              void Disconnect(Engine* pEngine);
226            
227                /**
228                 * This method can or should be called by the deriving driver in
229                 * case some fundamental parameter changed, especially if the
230                 * values returned by MaxSamplesPerCycle() and SamplerRate() have
231                 * changed, those are values which the sampler engines assume to be
232                 * constant for the life time of an audio device !
233                 *
234                 * By forcing a re-connection with this method, the sampler engines
235                 * are forced to update those informations metntioned above as well,
236                 * avoiding crashes or other undesired misbehaviors in such
237                 * circumstances.
238                 */
239                void ReconnectAll();
240    
241              /**              /**
242               * Returns audio channel with index \a ChannelIndex or NULL if               * Returns audio channel with index \a ChannelIndex or NULL if
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