From 9c0e19a3be2288db79e2502e5fa450c3e20a668d Mon Sep 17 00:00:00 2001 From: Guenter Geiger Date: Fri, 9 May 2003 16:04:00 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r610, which included commits to RCS files with non-trunk default branches. svn path=/trunk/; revision=611 --- pd/portaudio/docs/pa_tut_run.html | 56 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 pd/portaudio/docs/pa_tut_run.html (limited to 'pd/portaudio/docs/pa_tut_run.html') diff --git a/pd/portaudio/docs/pa_tut_run.html b/pd/portaudio/docs/pa_tut_run.html new file mode 100644 index 00000000..5c70d089 --- /dev/null +++ b/pd/portaudio/docs/pa_tut_run.html @@ -0,0 +1,56 @@ + + + + + + + + + PortAudio Tutorial + + +  +
+ + + +
+
+

+PortAudio Tutorial

+
+ +

+Starting and Stopping a Stream

+ +
The stream will not start running until you call Pa_StartStream(). +Then it will start calling your callback function to perform the audio +processing. +
+
err = Pa_StartStream( stream );
+if( err != paNoError ) goto error;
+
+At this point, audio is being generated. You can communicate to your callback +routine through the data structure you passed in on the open call, or through +global variables, or using other interprocess communication techniques. +Please be aware that your callback function may be called at interrupt +time when your foreground process is least expecting it. So avoid sharing +complex data structures that are easily corrupted like double linked lists. +

In many of the tests we simply sleep for a few seconds so we can hear +the sound. This is easy to do with Pa_Sleep() which will sleep for some +number of milliseconds. Do not rely on this function for accurate scheduling. +it is mostly for writing examples. +

+
/* Sleep for several seconds. */
+Pa_Sleep(NUM_SECONDS*1000);
+
+When you are through, you can stop the stream from the foreground. +
+
err = Pa_StopStream( stream );
+if( err != paNoError ) goto error;
+
+You can also stop the stream by returning 1 from your custom callback function.
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