2.4.2 Playback

An application performing a standard streaming playback operation should perform the following steps:

• IDeckLinkOutput::DoesSupportVideoMode() to check if the combination of the video mode and pixel format is supported.

• IDeckLinkOutput::EnableVideoOutput()

• IDeckLinkOutput::EnableAudioOutput()

• IDeckLinkOutput::SetScheduledFrameCompletionCallback()

• IDeckLinkOutput::SetAudioCallback()

• IDeckLinkOutput::BeginAudioPreroll()

While more frames or audio need to be pre-rolled:

• IDeckLinkOutput::ScheduleVideoFrame()

• Return audio data from IDeckLinkAudioOutputCallback::RenderAudioSamples().

• When audio preroll is complete, call IDeckLinkOutput::EndAudioPreroll().

• IDeckLinkOutput::StartScheduledPlayback()

While playback is running:

• Schedule more video frames from IDeckLinkVideoOutputCallback::ScheduledFrameCompleted() Schedule more audio from IDeckLinkAudioOutputCallback::RenderAudioSamples().

If audio is not required, the call to IDeckLinkOutput::EnableAudioOutput(), IDeckLinkOutput::SetAudioCallback() and IDeckLinkOutput::BeginAudioPreroll() may be omitted.

If pre-roll is not required initial IDeckLinkOutput::ScheduleVideoFrame() calls and the call to IDeckLinkOutput::BeginAudioPreroll() and IDeckLinkOutput::EndAudioPreroll() may be omitted.