From 74f4b1bc3b627ba4c7e03498234d88cacdfbe97b Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Wed, 29 Sep 2021 22:52:49 +0200
Subject: Squashed 'vorbis/' content from commit d22c3ab5f

git-subtree-dir: vorbis
git-subtree-split: d22c3ab5f633460abc2532feee60ca0892134cbf
---
 examples/vorbisfile_example.c | 91 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 examples/vorbisfile_example.c

(limited to 'examples/vorbisfile_example.c')

diff --git a/examples/vorbisfile_example.c b/examples/vorbisfile_example.c
new file mode 100644
index 0000000..d15bc4c
--- /dev/null
+++ b/examples/vorbisfile_example.c
@@ -0,0 +1,91 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
+ * by the Xiph.Org Foundation http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: simple example decoder using vorbisfile
+
+ ********************************************************************/
+
+/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to
+   stdout using vorbisfile. Using vorbisfile is much simpler than
+   dealing with libvorbis. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <vorbis/codec.h>
+#include <vorbis/vorbisfile.h>
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+char pcmout[4096]; /* take 4k out of the data segment, not the stack */
+
+int main(){
+  OggVorbis_File vf;
+  int eof=0;
+  int current_section;
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
+  /* Beware the evil ifdef. We avoid these where we can, but this one we
+     cannot. Don't add any more, you'll probably go to hell if you do. */
+  _setmode( _fileno( stdin ), _O_BINARY );
+  _setmode( _fileno( stdout ), _O_BINARY );
+#endif
+
+  if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) {
+      fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
+      exit(1);
+  }
+
+  /* Throw the comments plus a few lines about the bitstream we're
+     decoding */
+  {
+    char **ptr=ov_comment(&vf,-1)->user_comments;
+    vorbis_info *vi=ov_info(&vf,-1);
+    while(*ptr){
+      fprintf(stderr,"%s\n",*ptr);
+      ++ptr;
+    }
+    fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
+    fprintf(stderr,"\nDecoded length: %ld samples\n",
+            (long)ov_pcm_total(&vf,-1));
+    fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
+  }
+
+  while(!eof){
+    long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,&current_section);
+    if (ret == 0) {
+      /* EOF */
+      eof=1;
+    } else if (ret < 0) {
+      if(ret==OV_EBADLINK){
+        fprintf(stderr,"Corrupt bitstream section! Exiting.\n");
+        exit(1);
+      }
+
+      /* some other error in the stream.  Not a problem, just reporting it in
+         case we (the app) cares.  In this case, we don't. */
+    } else {
+      /* we don't bother dealing with sample rate changes, etc, but
+         you'll have to*/
+      fwrite(pcmout,1,ret,stdout);
+    }
+  }
+
+  /* cleanup */
+  ov_clear(&vf);
+
+  fprintf(stderr,"Done.\n");
+  return(0);
+}
-- 
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