1 files changed, 102 insertions, 0 deletions

diff --git a/apps/rbcodec_helpers.c b/apps/rbcodec_helpers.c
new file mode 100644
index 0000000000..a7c592c62c
--- /dev/null
+++ b/apps/rbcodec_helpers.c
@@ -0,0 +1,102 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Nicolas Pitre <nico@cam.org>
+ * Copyright (C) 2006-2007 by Stéphane Doyon <s.doyon@videotron.ca>
+ * Copyright (C) 2012 Michael Sevakis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "platform.h"
+#include "dsp_core.h"
+#include "core_alloc.h"
+#include "tdspeed.h"
+
+static int handles[4] = { 0, 0, 0, 0 };
+
+static int move_callback(int handle, void *current, void *new)
+{
+#if 0
+    /* Should not currently need to block this since DSP loop completes an
+       iteration before yielding and begins again at its input buffer */
+    if (dsp_is_busy(tdspeed_state.dsp))
+        return BUFLIB_CB_CANNOT_MOVE; /* DSP processing in progress */
+#endif
+
+    for (unsigned int i = 0; i < ARRAYLEN(handles); i++)
+    {
+        if (handle != handles[i])
+            continue;
+
+        tdspeed_move(i, current, new);
+        break;
+    }
+
+    return BUFLIB_CB_OK;
+}
+
+static struct buflib_callbacks ops =
+{
+    .move_callback = move_callback,
+    .shrink_callback = NULL,
+};
+
+/* Allocate timestretch buffers */
+bool tdspeed_alloc_buffers(int32_t **buffers, const int *buf_s, int nbuf)
+{
+    static const char *buffer_names[4] = {
+        "tdspeed ovl L",
+        "tdspeed ovl R",
+        "tdspeed out L",
+        "tdspeed out R"
+    };
+
+    for (int i = 0; i < nbuf; i++)
+    {
+        if (handles[i] <= 0)
+        {
+            handles[i] = core_alloc_ex(buffer_names[i], buf_s[i], &ops);
+
+            if (handles[i] <= 0)
+                return false;
+        }
+
+        if (buffers[i] == NULL)
+        {
+            buffers[i] = core_get_data(handles[i]);
+
+            if (buffers[i] == NULL)
+                return false;
+        }
+    }
+
+    return true;
+}
+
+/* Free timestretch buffers */
+void tdspeed_free_buffers(int32_t **buffers, int nbuf)
+{
+    for (int i = 0; i < nbuf; i++)
+    {
+        if (handles[i] > 0)
+            core_free(handles[i]);
+
+        handles[i] = 0;
+        buffers[i] = NULL;
+    }
+}
+