From b5716df4cb2837bbbc42195cf1aefcf03e21d6a6 Mon Sep 17 00:00:00 2001
From: Sean Bartell <wingedtachikoma@gmail.com>
Date: Fri, 24 Jun 2011 01:25:21 -0400
Subject: Build librbcodec with DSP and metadata.

All associated files are moved to /lib/rbcodec.

Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222
---
 lib/rbcodec/metadata/aiff.c | 108 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 lib/rbcodec/metadata/aiff.c

(limited to 'lib/rbcodec/metadata/aiff.c')

diff --git a/lib/rbcodec/metadata/aiff.c b/lib/rbcodec/metadata/aiff.c
new file mode 100644
index 0000000000..654f37cf98
--- /dev/null
+++ b/lib/rbcodec/metadata/aiff.c
@@ -0,0 +1,108 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Dave Chapman
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "system.h"
+#include "metadata.h"
+#include "metadata_common.h"
+#include "metadata_parsers.h"
+
+#include "debug.h"
+
+/* compressionType: AIFC QuickTime IMA ADPCM */
+#define AIFC_FORMAT_QT_IMA_ADPCM "ima4"
+
+bool get_aiff_metadata(int fd, struct mp3entry* id3)
+{
+    unsigned char buf[512];
+    unsigned long numChannels = 0;
+    unsigned long numSampleFrames = 0;
+    unsigned long numbytes = 0;
+    bool is_aifc = false;
+
+    if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, &buf[0], 12) < 12) ||
+        (memcmp(&buf[0], "FORM", 4) != 0) || (memcmp(&buf[8], "AIF", 3) != 0) ||
+        (!(is_aifc = (buf[11] == 'C')) && buf[11] != 'F'))
+    {
+        return false;
+    }
+
+    while (read(fd, &buf[0], 8) == 8)
+    {
+        size_t size = get_long_be(&buf[4]); /* chunkSize */
+
+        if (memcmp(&buf[0], "SSND", 4) == 0)
+        {
+            numbytes = size - 8;
+            break;  /* assume COMM was already read */
+        }
+
+        /* odd chunk sizes must be padded */
+        size += size & 1;
+
+        if (size > sizeof(buf))
+        {
+            DEBUGF("AIFF \"%4.4s\" chunk too large (%zd > %zd)",
+                    (char*) &buf[0], size, sizeof(buf));
+        }
+
+        if (memcmp(&buf[0], "COMM", 4) == 0)
+        {
+            if (size > sizeof(buf) || read(fd, &buf[0], size) != (ssize_t)size)
+                return false;
+
+            numChannels = ((buf[0]<<8)|buf[1]);
+
+            numSampleFrames = get_long_be(&buf[2]);
+
+            /* sampleRate */
+            id3->frequency = get_long_be(&buf[10]);
+            id3->frequency >>= (16+14-buf[9]);
+
+            /* save format infos */
+            id3->bitrate = ((buf[6]<<8)|buf[7]) * numChannels * id3->frequency;
+            id3->bitrate /= 1000;
+
+            if (!is_aifc || memcmp(&buf[18], AIFC_FORMAT_QT_IMA_ADPCM, 4) != 0)
+                id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
+            else
+            {
+                /* QuickTime IMA ADPCM is 1block = 64 data for each channel */
+                id3->length = ((int64_t) numSampleFrames * 64000LL) / id3->frequency;
+            }
+
+            id3->vbr = false;   /* AIFF files are CBR */
+            id3->filesize = filesize(fd);
+        }
+        else
+        {
+            /* skip chunk */
+            if (lseek(fd, size, SEEK_CUR) < 0)
+                return false;
+        }
+    }
+
+    return numbytes && numChannels;
+}
-- 
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