IAudioClient - 播放结束时收到通知？ [英] IAudioClient - get notified when playback ends?
问题描述
我不断向IAudioClient发送数据（GetBufferSize / GetCurrentPadding / GetBuffer / ReleaseBuffer），但我想知道音频设备何时播放我发送的最后一个数据。我不想假设播放器停止只是因为我将最后的
数据块发送到设备：它可能仍在播放缓冲数据。
I continuously send data to IAudioClient (GetBufferSize / GetCurrentPadding / GetBuffer / ReleaseBuffer), but I want to know when the audio device finishes playing the last data I sent. I do not want to assume the player stopped just because I sent the last chunk of data to the device: it might still be playing the buffered data.
我尝试使用IAudioClock / IAudioClock2检查硬件缓冲区位置，但从发送最后一个块的那一刻起它保持不变。
I tried using IAudioClock / IAudioClock2 to check the hardware buffer position, but it stays the same from the moment I send the last chunk.
我也没有在IMMNotificationClient和IAudioSessionNotification接口中看到任何相关信息......
I also don't see anything relevant in the IMMNotificationClient and IAudioSessionNotification interfaces...
我缺少什么？
谢谢！
| Dmitry Streblechenko（MVP） | |
| Dmitry Streblechenko (MVP) | |
| http://www.dimastr.com/redemption Redemption - what the Outlook Object Model should have been Version 5.5 is now available! |
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推荐答案
获得"最后一滴"的方法超出有限的流是要执行以下操作：
The way to get the "last drop" out of a finite stream is to do the following:
- 正常使用IAudioRenderClient :: GetBuffer / ReleaseBuffer来播放所有真实内容
- 当你的实际内容用完时，继续使用IAudioRenderClient :: GetBuffer / ReleaseBuffer，但是传递
AUDCLNT_BUFFERFLAGS_SILENT 标志在ReleaseBuffer调用上观看IAudioClock :: GetPosition以查看扬声器的内容 - 当IAudioClock :: GetPosition显示所有真实内容都已播放，并且Windows已经转移到静音时，现在可以安全使用调用IAudioClient :: Stop。
- Use IAudioRenderClient::GetBuffer/ReleaseBuffer as normal to play all of the real content
- When you run out of real content, continue to use IAudioRenderClient::GetBuffer/ReleaseBuffer, but pass the AUDCLNT_BUFFERFLAGS_SILENT flag on the ReleaseBuffer call to tell the engine to insert silence
- Watch IAudioClock::GetPosition to see what is coming out of the speakers
- When IAudioClock::GetPosition shows that all of the real content has played, and Windows has moved on to the silence, it is now safe to call IAudioClient::Stop.
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