From 4d961f21285de89360173ccc76ee82eb504d726e Mon Sep 17 00:00:00 2001
From: Dave Chapman <dave@dchapman.com>
Date: Sat, 19 Feb 2005 12:11:18 +0000
Subject: First version of vorbis decoder

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6017 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugins/vorbis2wav.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 apps/plugins/vorbis2wav.c

(limited to 'apps/plugins/vorbis2wav.c')

diff --git a/apps/plugins/vorbis2wav.c b/apps/plugins/vorbis2wav.c
new file mode 100644
index 0000000000..3b5de72c74
--- /dev/null
+++ b/apps/plugins/vorbis2wav.c
@@ -0,0 +1,159 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "plugin.h"
+
+#if (CONFIG_HWCODEC == MASNONE)
+/* software codec platforms */
+
+#include <codecs/Tremor/ivorbisfile.h>
+
+#include "lib/xxx2wav.h" /* Helper functions common to test decoders */
+
+static struct plugin_api* rb;
+
+/* Some standard functions and variables needed by Tremor */
+
+int errno;
+
+size_t strlen(const char *s) {
+  return(rb->strlen(s));
+}
+
+char *strcpy(char *dest, const char *src) {
+  return(rb->strcpy(dest,src));
+}
+
+char *strcat(char *dest, const char *src) {
+  return(rb->strcat(dest,src));
+}
+
+size_t read_handler(void *ptr, size_t size, size_t nmemb, void *datasource) {
+    size_t len;
+    file_info_struct *p = (file_info_struct *) datasource;
+
+    if (p->curpos >= p->filesize) {
+      return 0; /* EOF */
+    }
+
+    len=nmemb*size;
+    if ((long)(p->curpos+len) > (long)p->filesize) { len=p->filesize-p->curpos; }
+
+    rb->memcpy(ptr,&filebuf[p->curpos],len);
+    p->curpos+=len;
+
+    return(len);  
+}
+
+int seek_handler(void *datasource, ogg_int64_t offset, int whence) {
+  /* We are not seekable at the moment */
+  (void)datasource;
+  (void)offset;
+  (void)whence;
+  return -1;
+}
+
+int close_handler(void *datasource) {
+  (void)datasource;
+  return 0;
+}
+
+long tell_handler(void *datasource) {
+  file_info_struct *p = (file_info_struct *) datasource;
+  return p->curpos;
+}
+
+
+/* this is the plugin entry point */
+enum plugin_status plugin_start(struct plugin_api* api, void* file)
+{
+  ov_callbacks callbacks;
+  OggVorbis_File vf;
+  vorbis_info* vi;
+
+  int error;
+  long n;
+  int current_section;
+  int eof;
+  static char pcmbuf[4096];
+
+  file_info_struct file_info;
+
+  TEST_PLUGIN_API(api);
+
+  /* if you are using a global api pointer, don't forget to copy it!
+     otherwise you will get lovely "I04: IllInstr" errors... :-) */
+  rb = api;
+
+
+  /* This function sets up the buffers and reads the file into RAM */
+
+  if (local_init(file,"/vorbistest.wav",&file_info,api)) {
+    return PLUGIN_ERROR;
+  }
+
+  /* Create a decoder instance */
+
+  callbacks.read_func=read_handler;
+  callbacks.seek_func=seek_handler;
+  callbacks.tell_func=tell_handler;
+  callbacks.close_func=close_handler;
+
+  file_info.frames_decoded=0;
+  file_info.start_tick=*(rb->current_tick);
+  rb->button_clear_queue();
+
+  error=ov_open_callbacks(&file_info,&vf,NULL,0,callbacks);
+
+  vi=ov_info(&vf,-1);
+
+  if (vi==NULL) {
+    rb->splash(HZ*2, true, "Error");
+  }
+  file_info.samplerate=vi->rate;
+  
+  eof=0;
+  while (!eof) {
+    /* Read host-endian signed 16 bit PCM samples */
+    n=ov_read(&vf,pcmbuf,sizeof(pcmbuf),&current_section);
+
+    if (n==0) {
+      eof=1;
+    } else if (n < 0) {
+      dprintf("Error decoding frame\n");
+    } else {
+      file_info.frames_decoded++;
+      rb->write(file_info.outfile,pcmbuf,n);
+      file_info.current_sample+=(n/4);
+    }
+
+    display_status(&file_info);
+
+    if (rb->button_get(false)!=BUTTON_NONE) {
+      close_wav(&file_info);
+      return PLUGIN_OK;
+    }
+  }
+
+  close_wav(&file_info);
+  rb->splash(HZ*2, true, "FINISHED!");
+
+  return PLUGIN_OK;
+}
+#endif /* CONFIG_HWCODEC == MASNONE */
-- 
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