split up the metadata parser

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13637 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 98 insertions, 0 deletions

diff --git a/apps/metadata/aiff.c b/apps/metadata/aiff.c
new file mode 100644
index 0000000..3b155ca
--- /dev/null
+++ b/apps/metadata/aiff.c
@@ -0,0 +1,98 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Dave Chapman
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "system.h"
+#include "id3.h"
+#include "metadata_common.h"
+
+bool get_aiff_metadata(int fd, struct mp3entry* id3)
+{
+    /* Use the trackname part of the id3 structure as a temporary buffer */
+    unsigned char* buf = (unsigned char *)id3->path;
+    unsigned long numChannels = 0;
+    unsigned long numSampleFrames = 0;
+    unsigned long sampleSize = 0;
+    unsigned long sampleRate = 0;
+    unsigned long numbytes = 0;
+    int read_bytes;
+    int i;
+
+    if ((lseek(fd, 0, SEEK_SET) < 0) 
+        || ((read_bytes = read(fd, buf, sizeof(id3->path))) < 54))
+    {
+        return false;
+    }
+    
+    if ((memcmp(buf, "FORM",4) != 0)
+        || (memcmp(&buf[8], "AIFF", 4) !=0 ))
+    {
+        return false;
+    }
+
+    buf += 12;
+    read_bytes -= 12;
+
+    while ((numbytes == 0) && (read_bytes >= 8)) 
+    {
+        /* chunkSize */
+        i = get_long_be(&buf[4]);
+        
+        if (memcmp(buf, "COMM", 4) == 0)
+        {
+            /* numChannels */
+            numChannels = ((buf[8]<<8)|buf[9]);
+            /* numSampleFrames */
+            numSampleFrames = get_long_be(&buf[10]);
+            /* sampleSize */
+            sampleSize = ((buf[14]<<8)|buf[15]);
+            /* sampleRate */
+            sampleRate = get_long_be(&buf[18]);
+            sampleRate = sampleRate >> (16+14-buf[17]);
+            /* save format infos */
+            id3->bitrate = (sampleSize * numChannels * sampleRate) / 1000;
+            id3->frequency = sampleRate;
+            id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
+
+            id3->vbr = false;   /* AIFF files are CBR */
+            id3->filesize = filesize(fd);
+        }
+        else if (memcmp(buf, "SSND", 4) == 0) 
+        {
+            numbytes = i - 8;
+        }
+
+        if (i & 0x01)
+        {
+            i++;  /* odd chunk sizes must be padded */
+        }
+        buf += i + 8;
+        read_bytes -= i + 8;
+    }
+
+    if ((numbytes == 0) || (numChannels == 0)) 
+    {
+        return false;
+    }
+    return true;
+}