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_open.html | 52 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 pd/portaudio/docs/pa_tut_open.html (limited to 'pd/portaudio/docs/pa_tut_open.html') diff --git a/pd/portaudio/docs/pa_tut_open.html b/pd/portaudio/docs/pa_tut_open.html new file mode 100644 index 00000000..1621ef30 --- /dev/null +++ b/pd/portaudio/docs/pa_tut_open.html @@ -0,0 +1,52 @@ + + + + + + + + + PortAudio Tutorial + + +  +
+ + + +
+
+

+PortAudio Tutorial

+
+ +

+Opening a Stream using Defaults

+ +
The next step is to open a stream which is similar to opening +a file. You can specify whether you want audio input and/or output, how +many channels, the data format, sample rate, etc. There are two calls for +opening streams, Pa_OpenStream() and Pa_OpenDefaultStream(). +

Pa_OpenStream() takes extra  parameters which give you +more control. You can normally just use Pa_OpenDefaultStream() +which just calls Pa_OpenStream() with some reasonable +default values.  Let's open a stream for stereo output, using floating +point data, at 44100 Hz. +

+
err = Pa_OpenDefaultStream(
+    &stream,        /* passes back stream pointer */
+    0,              /* no input channels */
+    2,              /* stereo output */
+    paFloat32,      /* 32 bit floating point output */
+    44100,          /* sample rate */
+    256,            /* frames per buffer */
+    0,              /* number of buffers, if zero then use default minimum */
+    patestCallback, /* specify our custom callback */
+    &data );        /* pass our data through to callback */
+
+If you want to use 16 bit integer data, pass paInt16 instead of +paFloat32.
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