1 files changed, 123 insertions, 0 deletions

diff --git a/apps/metadata/tta.c b/apps/metadata/tta.c
new file mode 100644
index 0000000000..1d3d95f118
--- /dev/null
+++ b/apps/metadata/tta.c
@@ -0,0 +1,123 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 <stdlib.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "system.h"
+#include "metadata.h"
+#include "metadata_common.h"
+#include "metadata_parsers.h"
+#include "logf.h"
+
+#define TTA1_SIGN    0x31415454
+
+#define TTA_HEADER_ID              0
+#define TTA_HEADER_AUDIO_FORMAT    (TTA_HEADER_ID              + sizeof(unsigned int))
+#define TTA_HEADER_NUM_CHANNELS    (TTA_HEADER_AUDIO_FORMAT    + sizeof(unsigned short))
+#define TTA_HEADER_BITS_PER_SAMPLE (TTA_HEADER_NUM_CHANNELS    + sizeof(unsigned short))
+#define TTA_HEADER_SAMPLE_RATE     (TTA_HEADER_BITS_PER_SAMPLE + sizeof(unsigned short))
+#define TTA_HEADER_DATA_LENGTH     (TTA_HEADER_SAMPLE_RATE     + sizeof(unsigned int))
+#define TTA_HEADER_CRC32           (TTA_HEADER_DATA_LENGTH     + sizeof(unsigned int))
+#define TTA_HEADER_SIZE            (TTA_HEADER_CRC32           + sizeof(unsigned int))
+
+#define TTA_HEADER_GETTER_ID(x)              get_long_le(x)
+#define TTA_HEADER_GETTER_AUDIO_FORMAT(x)    get_short_le(x)
+#define TTA_HEADER_GETTER_NUM_CHANNELS(x)    get_short_le(x)
+#define TTA_HEADER_GETTER_BITS_PER_SAMPLE(x) get_short_le(x)
+#define TTA_HEADER_GETTER_SAMPLE_RATE(x)     get_long_le(x)
+#define TTA_HEADER_GETTER_DATA_LENGTH(x)     get_long_le(x)
+#define TTA_HEADER_GETTER_CRC32(x)           get_long_le(x)
+
+#define GET_HEADER(x, tag) TTA_HEADER_GETTER_ ## tag((x) + TTA_HEADER_ ## tag)
+
+static void read_id3_tags(int fd, struct mp3entry* id3)
+{
+    id3->title    = NULL;
+    id3->filesize = filesize(fd);
+    id3->id3v2len = getid3v2len(fd);
+    id3->tracknum = 0;
+    id3->discnum  = 0;
+    id3->vbr      = false;   /* All TTA files are CBR */
+
+    /* first get id3v2 tags. if no id3v2 tags ware found, get id3v1 tags */
+    if (id3->id3v2len)
+    {
+        setid3v2title(fd, id3);
+        id3->first_frame_offset = id3->id3v2len;
+        return;
+    }
+    setid3v1title(fd, id3);
+}
+
+bool get_tta_metadata(int fd, struct mp3entry* id3)
+{
+    unsigned char ttahdr[TTA_HEADER_SIZE];
+    unsigned int datasize;
+    unsigned int origsize;
+    int bps;
+
+    lseek(fd, 0, SEEK_SET);
+
+    /* read id3 tags */
+    read_id3_tags(fd, id3);
+    lseek(fd, id3->id3v2len, SEEK_SET);
+
+    /* read TTA header */
+    if (read(fd, ttahdr, TTA_HEADER_SIZE) < 0)
+        return false;
+
+    /* check for TTA3 signature */
+    if ((GET_HEADER(ttahdr, ID)) != TTA1_SIGN)
+        return false;
+
+    /* skip check CRC */
+
+    id3->channels  = (GET_HEADER(ttahdr, NUM_CHANNELS));
+    id3->frequency = (GET_HEADER(ttahdr, SAMPLE_RATE));
+    id3->length    = ((GET_HEADER(ttahdr, DATA_LENGTH)) / id3->frequency) * 1000LL;
+    bps            = (GET_HEADER(ttahdr, BITS_PER_SAMPLE));
+
+    datasize = id3->filesize - id3->first_frame_offset;
+    origsize = (GET_HEADER(ttahdr, DATA_LENGTH)) * ((bps + 7) / 8) * id3->channels;
+
+    id3->bitrate = (int) ((uint64_t) datasize * id3->frequency * id3->channels * bps
+                                               / (origsize * 1000LL));
+
+    /* output header info (for debug) */
+    DEBUGF("TTA header info ----\n");
+    DEBUGF("id:        %x\n",  (unsigned int)(GET_HEADER(ttahdr, ID)));
+    DEBUGF("channels:  %d\n",  id3->channels);
+    DEBUGF("frequency: %ld\n", id3->frequency);
+    DEBUGF("length:    %ld\n", id3->length);
+    DEBUGF("bitrate:   %d\n",  id3->bitrate);
+    DEBUGF("bits per sample: %d\n", bps);
+    DEBUGF("compressed size: %d\n", datasize);
+    DEBUGF("original size:   %d\n", origsize);
+    DEBUGF("id3----\n");
+    DEBUGF("artist:  %s\n",  id3->artist);
+    DEBUGF("title:   %s\n",  id3->title);
+    DEBUGF("genre:   %s\n",  id3->genre_string);
+
+    return true;
+}