c - 使用 libpulse 播放多个流

Question

如何使用 libpulse 播放多个 audio 流。我知道可以通过对多个流求和并使用 libaudio 进行播放，但是是否可以在 lib pulse api 上编写多个流并让 PulseAudio 进行求和？

Answer 1

我通过实现这个得到了解决方案。 libpulse API

同步多个播放流

PulseAudio allows applications to fully synchronize multiple playback streams that are connected to the same output device. That means the streams will always be played back sample-by-sample synchronously. If stream operations like pa_stream_cork() are issued on one of the synchronized streams, they are simultaneously issued on the others. To synchronize a stream to another, just pass the "master" stream as last argument to pa_stream_connect_playback(). To make sure that the freshly created stream doesn't start playback right-away, make sure to pass PA_STREAM_START_CORKED and – after all streams have been created – uncork them all with a single call to pa_stream_cork() for the master stream. To make sure that a particular stream doesn't stop to play when a server side buffer underrun happens on it while the other synchronized streams continue playing and hence deviate, you need to pass a "prebuf" pa_buffer_attr of 0 when connecting it.