Build librbcodec with DSP and metadata.

All associated files are moved to /lib/rbcodec. Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222
2011-06-24 01:25:21 -04:00 · 2011-06-24 01:25:21 -04:00 · b5716df4cb
commit b5716df4cb
parent 24bd9d5393
80 changed files with 97 additions and 112 deletions
--- a/lib/rbcodec/metadata/au.c
+++ b/lib/rbcodec/metadata/au.c
@ -0,0 +1,105 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2010 Yoshihisa Uchida
+ *
+ * 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 <inttypes.h>
+
+#include "system.h"
+#include "metadata.h"
+#include "metadata_common.h"
+#include "metadata_parsers.h"
+#include "logf.h"
+
+static const unsigned char bitspersamples[9] = {
+    0,  /* encoding */
+    8,  /* 1:  G.711 MULAW      */
+    8,  /* 2:  Linear PCM 8bit  */
+    16, /* 3:  Linear PCM 16bit */
+    24, /* 4:  Linear PCM 24bit */
+    32, /* 5:  Linear PCM 32bit */
+    32, /* 6:  IEEE float 32bit */
+    64, /* 7:  IEEE float 64bit */
+        /* encoding 8 - 26 unsupported. */
+    8,  /* 27: G.711 ALAW       */
+};
+
+static inline unsigned char get_au_bitspersample(unsigned int encoding)
+{
+    if (encoding < 8)
+        return bitspersamples[encoding];
+    else if (encoding == 27)
+        return bitspersamples[8];
+
+    return 0;
+}
+
+bool get_au_metadata(int fd, struct mp3entry* id3)
+{
+    /* temporary buffer */
+    unsigned char* buf = (unsigned char *)id3->path;
+    unsigned long numbytes = 0;
+    int offset;
+
+    id3->vbr      = false;   /* All Sun audio files are CBR */
+    id3->filesize = filesize(fd);
+    id3->length   = 0;
+
+    lseek(fd, 0, SEEK_SET);
+    if ((read(fd, buf, 24) < 24) || (memcmp(buf, ".snd", 4) != 0))
+    {
+        /*
+         * no header
+         *
+         * frequency:       8000 Hz
+         * bits per sample: 8 bit
+         * channel:         mono
+         */
+        numbytes = id3->filesize;
+        id3->frequency = 8000;
+        id3->bitrate   = 8;
+    }
+    else
+    {
+        /* parse header */
+
+        /* data offset */
+        offset = get_long_be(buf + 4);
+        if (offset < 24)
+        {
+            DEBUGF("CODEC_ERROR: sun audio offset size is small: %d\n", offset);
+            return false;
+        }
+        /* data size */
+        numbytes = get_long_be(buf + 8);
+        if (numbytes == (uint32_t)0xffffffff)
+            numbytes = id3->filesize - offset;
+
+        id3->frequency = get_long_be(buf + 16);
+        id3->bitrate = get_au_bitspersample(get_long_be(buf + 12)) * get_long_be(buf + 20)
+                                                                   * id3->frequency / 1000;
+    }
+
+    /* Calculate track length [ms] */
+    if (id3->bitrate)
+        id3->length = (numbytes << 3) / id3->bitrate;
+
+    return true;
+}