Libspotify打的问题 [英] Libspotify playing problems

问题描述

我在写身边libspotfiy一个C＃包装，并有与播放曲目的问题。从我所知道的，当我想启动一个会话流的第一次轨道，我应该叫

I'm writing a C# wrapper around libspotfiy, and have a problem with the track playing. From what I can tell, when I want to start streaming a track for the first time in a session, I should call

sp_session_player_load(sessionHandle, trackHandle)
sp_session_player_play(sessionHandle, true);

这是我在做什么，并能正常工作。当我要玩别的问题开始。与轨道还在打，我是什么意思做玩一个新的？我应该叫

This is what I'm doing, and it works fine. The problem start when I want to play something else. With a track still playing, what am I meant to do to play a new one? Should I call

sp_session_player_play(sessionHandle, false);
sp_session_player_unload(sessionHandle);

在然后调用了新一轮的加载/玩？我问，因为我这样做的时候，我经常看到我的程序挂起当我打电话卸载，或致电与假参数玩。我使用的是get_audio_buffer_stats回调。我有到位适当的线程syncronisation，因此，如果不正确地I'mu唱API我不知道？

Before then calling a new round of load/play? I ask because when I do this, I often see my program hang when I call the unload, or call play with an argument of false. I'm using the get_audio_buffer_stats callback. I've got appropriate thread syncronisation in place, so I'm wondering if I'mu sing the api incorrectly?

推荐答案

这正是官方的Mac和iOS库做什么，并能正常工作：

This is exactly what the official Mac and iOS library does, and it works fine:

当打的第一次：

sp_session_player_load(sessionHandle, trackHandle)
sp_session_player_play(sessionHandle, true);

当再次播放：

sp_session_player_play(sessionHandle, false);
sp_session_player_unload(sessionHandle);
sp_session_player_load(sessionHandle, trackHandle)
sp_session_player_play(sessionHandle, true);

有几件事情你可以检查，但：

There are a couple of things you can check, though:

• 最常见的挂我所看到的是，由于该方案是如何实现 notify_main_thread 回调。当你得到这一点，你必须安排在非阻塞的方式在主线程中调用，以便 sp_session_process_events 。也就是说，你的 notify_main_thread 实施前应 sp_session_process_events 返回被称为另一个线程上。

• The most common hang I've seen is due to how the program implements the notify_main_thread callback. When you get this, you must schedule a call so sp_session_process_events on the main thread in a non-blocking way. I.e., your notify_main_thread implementation should return before sp_session_process_events is called on the other thread.

试着拿出你的 get_audio_buffer_stats 的实施。这台Mac / iOS的库没有实现这个在所有 - 它不是必需的。

Try taking out your get_audio_buffer_stats implementation. This Mac/iOS library doesn't implement this at all - it isn't required.

如果这ISN ŧ不够，请尽量让挂起的堆栈跟踪。如果你发现它在调试器，击中暂停往往是不够好。

If this isn't enough, please try to get a stack trace of the hang. If you catch it in the debugger, hitting pause is often good enough.

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