Imported Upstream version 4.2-build2006upstream/4.2-build2006upstream

1 files changed, 97 insertions, 0 deletions

diff --git a/tutorials/sndkit/samples/recsrc.c b/tutorials/sndkit/samples/recsrc.c
new file mode 100644
index 0000000..cc30923
--- /dev/null
+++ b/tutorials/sndkit/samples/recsrc.c
@@ -0,0 +1,97 @@
+/*
+ * Purpose: A sample program for recording source selection
+ * Copyright (C) 4Front Technologies, 2002-2004. Released under GPLv2/CDDL.
+ *
+ * Description:
+ * This program demonstrates the new ioctl call interface used to
+ * control the recording source.
+ *
+ * The same program can be used for playback target selection simply by
+ * changing O_RDONLY to O_WRONLY in the open call and by replacing all
+ * "RECSRC" strings with "PLAYTGT" (see playtgt.c).
+ *
+ * The first command line argument is the audio device (/dev/dsp#). If there 
+ * are no other arguments then the available choices will be printed. If the 
+ * second argument is "-" then the current setting will be printed.
+ * Finally the source can be changed by giving it's name as the
+ * second argument.
+ *
+ * {!notice Please not that the change may stay in effect even after closing
+ * the device. However equally well it's possible that the device returns back
+ * to some default source. There is no way to predict how the device will
+ * behave and the application must not expect any particular behaviour.}
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <soundcard.h>
+#include <time.h>
+
+int
+main (int argc, char *argv[])
+{
+  int fd, i, src;
+  oss_mixer_enuminfo ei;
+
+  if (argc < 2)
+    {
+      fprintf (stderr, "Usage: %s dspdev\n", argv[0]);
+      exit (-1);
+    }
+
+  if ((fd = open (argv[1], O_RDONLY, 0)) == -1)
+    {
+      perror (argv[1]);
+      exit (-1);
+    }
+
+  if (ioctl (fd, SNDCTL_DSP_GET_RECSRC_NAMES, &ei) == -1)
+    {
+      perror ("SNDCTL_DSP_GET_RECSRC_NAMES");
+      exit (-1);
+    }
+
+  if (argc == 2)
+    {
+      for (i = 0; i < ei.nvalues; i++)
+	printf ("Rec source #%d = '%s'\n", i, ei.strings + ei.strindex[i]);
+      exit (0);
+    }
+
+  if (strcmp (argv[2], "?") == 0 || strcmp (argv[2], "-") == 0)
+    {
+      if (ioctl (fd, SNDCTL_DSP_GET_RECSRC, &src) == -1)
+	{
+	  perror ("SNDCTL_DSP_GET_RECSRC");
+	  exit (-1);
+	}
+
+      printf ("Current recording source is #%d\n", src);
+      printf ("Current recording source is #%d (%s)\n",
+	      src, ei.strings + ei.strindex[src]);
+      exit (0);
+    }
+
+  src = 0;
+
+  for (i = 0; i < ei.nvalues; i++)
+    {
+      if (strcmp (argv[2], ei.strings + ei.strindex[i]) == 0)
+	{
+	  if (ioctl (fd, SNDCTL_DSP_SET_RECSRC, &src) == -1)
+	    {
+	      perror ("SNDCTL_DSP_SET_RECSRC");
+	      exit (-1);
+	    }
+
+	  exit (0);
+	}
+
+      src++;
+    }
+
+  fprintf (stderr, "What?\n");
+  exit (-1);
+}