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authorYoshihisa Uchida <uchida@rockbox.org>2010-02-24 11:46:29 +0000
committerYoshihisa Uchida <uchida@rockbox.org>2010-02-24 11:46:29 +0000
commit45e009a364d3ee105bf6b2ebb2e28445c9c6e3fd (patch)
tree7c0cff93773ebb8d88a4fc0fecd126fcbee46124 /apps/metadata/smaf.c
parentaa58715a54cb62638b263b7942c46e25ec928534 (diff)
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add SMAF codec (.mmf extension)(FS#10432)
This codec supports only wave data (ADPCM and PCM). It does not support MIDI, picture, and movie. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24878 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/metadata/smaf.c')
-rw-r--r--apps/metadata/smaf.c369
1 files changed, 369 insertions, 0 deletions
diff --git a/apps/metadata/smaf.c b/apps/metadata/smaf.c
new file mode 100644
index 0000000000..f7d825c96a
--- /dev/null
+++ b/apps/metadata/smaf.c
@@ -0,0 +1,369 @@
+/***************************************************************************
+ * __________ __ ___.
+ * 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 "rbunicode.h"
+#include "logf.h"
+
+static int basebits[4] = { 4, 8, 12, 16 };
+
+static int frequency[5] = { 4000, 8000, 11025, 22050, 44100 };
+
+static int support_codepages[7] = {
+ SJIS, ISO_8859_1, -1, GB_2312, BIG_5, -1, -1,
+};
+
+/* extra codepage */
+#define UCS_2 (NUM_CODEPAGES + 1)
+#define UTF_16 (NUM_CODEPAGES + 2)
+
+/* support id3 tag */
+#define TAG_TITLE (('S'<<8)|'T')
+#define TAG_ARTIST (('A'<<8)|'N')
+#define TAG_COMPOSER (('S'<<8)|'W')
+
+static unsigned char smafbuf[1024];
+
+static bool read_datachunk(unsigned char *src, int size, unsigned short tag,
+ int codepage, unsigned char *dst)
+{
+ int datasize = 0;
+ unsigned char *utf8;
+
+ while(size > datasize + 4)
+ {
+ datasize = (src[2] << 8) | src[3];
+ if (tag == ((src[0] << 8) | src[1]))
+ {
+ src += 4;
+ if (codepage < NUM_CODEPAGES)
+ utf8 = iso_decode(src, dst, codepage, datasize);
+ else /* codepage == UTF_16, UCS_2 */
+ utf8 = utf16BEdecode(src, dst, datasize);
+ *utf8 = '\0';
+
+ return true;
+ }
+ src += (datasize + 4);
+ }
+ return false;
+}
+
+static bool read_option(unsigned char *src, int size, unsigned short tag,
+ int codepage, unsigned char *dst)
+{
+ int datasize = 0;
+ unsigned char *endsrc = src + size;
+ unsigned char *utf8;
+
+ while(src < endsrc)
+ {
+ utf8 = src;
+ src += 3;
+ datasize = 0;
+ while (*src != ',' || *(src-1) == '\\')
+ {
+ datasize++;
+ src++;
+ }
+ if (tag == ((utf8[0] << 8) | utf8[1]) && utf8[2] == ':')
+ {
+ utf8 += 3;
+ if (codepage < NUM_CODEPAGES)
+ utf8 = iso_decode(utf8, dst, codepage, datasize);
+ else /* codepage == UTF_16, UCS_2 */
+ utf8 = utf16BEdecode(utf8, dst, datasize);
+ *utf8 = '\0';
+
+ return true;
+ }
+ src++;
+ }
+ return false;
+}
+
+static int convert_smaf_audio_frequency(unsigned int freq)
+{
+ if (freq > 4)
+ return 0;
+ return frequency[freq];
+}
+
+static int convert_smaf_audio_basebit(unsigned int basebit)
+{
+ if (basebit > 4)
+ return 0;
+ return basebits[basebit];
+}
+
+static int convert_smaf_codetype(unsigned int codetype)
+{
+ if (codetype < 7)
+ return support_codepages[codetype];
+ else if (codetype < 0x20)
+ return -1;
+ else if (codetype == 0x20)
+ return UCS_2;
+ else if (codetype == 0x23)
+ return UTF_8;
+ else if (codetype == 0x24)
+ return UTF_16;
+ else if (codetype == 0xff)
+ return ISO_8859_1;
+ return -1;
+}
+
+static bool get_smaf_metadata_audio_track(struct mp3entry *id3,
+ unsigned char* buf, unsigned char *endbuf)
+{
+ int bitspersample;
+ int channels;
+ int chunksize;
+ long numbytes;
+ unsigned long totalsamples;
+
+ channels = ((buf[10] & 0x80) >> 7) + 1;
+ bitspersample = convert_smaf_audio_basebit(buf[11] >> 4);
+ if (bitspersample == 0)
+ {
+ DEBUGF("metada error: smaf unsupport basebit %d\n", buf[11] >> 4);
+ return false;
+ }
+ id3->frequency = convert_smaf_audio_frequency(buf[10] & 0x0f);
+
+ buf += 14;
+ while (buf < endbuf)
+ {
+ chunksize = get_long_be(buf + 4) + 8;
+ if (memcmp(buf, "Awa", 3) == 0)
+ {
+ numbytes = get_long_be(buf + 4) - 3;
+ totalsamples = (numbytes << 3) / (bitspersample * channels);
+
+ /* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
+ id3->length = ((int64_t)totalsamples * 1000LL) / id3->frequency;
+
+ return true;
+ }
+ buf += chunksize;
+ }
+ DEBUGF("metada error: smaf does not include pcm audio data\n");
+ return false;
+}
+
+static bool get_smaf_metadata_score_track(struct mp3entry *id3,
+ unsigned char* buf, unsigned char *endbuf)
+{
+ int bitspersample;
+ int channels;
+ int chunksize;
+ long numbytes;
+ unsigned long totalsamples;
+
+ /*
+ * skip to the next chunk.
+ * MA-2/MA-3/MA-5: padding 16 bytes
+ * MA-7: padding 32 bytes
+ */
+ if (buf[3] < 7)
+ buf += 28;
+ else
+ buf += 44;
+
+ while (buf + 10 < endbuf)
+ {
+ chunksize = get_long_be(buf + 4) + 8;
+ if (memcmp(buf, "Mtsp", 4) == 0)
+ {
+ buf += 8;
+ if (memcmp(buf, "Mwa", 3) != 0)
+ {
+ DEBUGF("metada error: smaf unsupport format: %c%c%c%c\n",
+ buf[0], buf[1], buf[2], buf[3]);
+ return false;
+ }
+
+ channels = ((buf[8] & 0x80) >> 7) + 1;
+ bitspersample = convert_smaf_audio_basebit(buf[8] & 0x0f);
+ if (bitspersample == 0)
+ {
+ DEBUGF("metada error: smaf unsupport basebit %d\n", buf[8] & 0x0f);
+ return false;
+ }
+
+ numbytes = get_long_be(buf + 4) - 3;
+ totalsamples = numbytes * 8 / (bitspersample * channels);
+
+ id3->frequency = (buf[9] << 8) | buf[10];
+
+ /* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
+ id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
+
+ return true;
+ }
+ buf += chunksize;
+ }
+ DEBUGF("metada error: smaf does not include pcm audio data\n");
+ return false;
+}
+
+bool get_smaf_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 char *endbuf = smafbuf + 1024;
+ int i;
+ int contents_size;
+ int codepage = ISO_8859_1;
+
+ id3->title = NULL;
+ id3->artist = NULL;
+ id3->composer = NULL;
+
+ id3->vbr = false; /* All SMAF files are CBR */
+ id3->filesize = filesize(fd);
+
+ /* get RIFF chunk header */
+ if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 21) < 21))
+ {
+ return false;
+ }
+
+ if ((memcmp(buf, "MMMD", 4) != 0) || (memcmp(&buf[8], "CNTI", 4) != 0))
+ {
+ DEBUGF("metada error: does not smaf format\n");
+ return false;
+ }
+
+ contents_size = get_long_be(buf + 12);
+ if (contents_size < 5)
+ {
+ DEBUGF("metada error: CNTI chunk size is small %d\n", contents_size);
+ return false;
+ }
+
+ contents_size -= 5;
+ i = contents_size;
+ if (i == 0)
+ {
+ read(fd, buf, 16);
+ if (memcmp(buf, "OPDA", 4) != 0)
+ {
+ DEBUGF("metada error: smaf does not include OPDA chunk\n");
+ return false;
+ }
+ contents_size = get_long_be(buf + 4) - 8;
+
+ if (memcmp(buf + 8, "Dch", 3) != 0)
+ {
+ DEBUGF("metada error: smaf does not include Dch chunk\n");
+ return false;
+ }
+ codepage = convert_smaf_codetype(buf[11]);
+ if (codepage < 0)
+ {
+ DEBUGF("metada error: smaf unsupport codetype: %d\n", buf[11]);
+ return false;
+ }
+
+ i = get_long_be(buf + 12);
+
+ if (i > MAX_PATH)
+ {
+ DEBUGF("metada warning: smaf contents size is big %d\n", i);
+ i = MAX_PATH;
+ }
+ if (read(fd, buf, i) < i)
+ return false;
+
+ /* title */
+ if (read_datachunk(buf, i, TAG_TITLE, codepage, id3->id3v1buf[0]))
+ id3->title = id3->id3v1buf[0];
+
+ /* artist */
+ if (read_datachunk(buf, i, TAG_ARTIST, codepage, id3->id3v1buf[1]))
+ id3->artist = id3->id3v1buf[1];
+
+ /* composer */
+ if (read_datachunk(buf, i, TAG_COMPOSER, codepage, id3->id3v1buf[2]))
+ id3->composer = id3->id3v1buf[2];
+ }
+ else
+ {
+ codepage = convert_smaf_codetype(buf[14]);
+ if (codepage < 0)
+ {
+ DEBUGF("metada error: smaf unsupport codetype: %d\n", buf[11]);
+ return false;
+ }
+
+ if (i > MAX_PATH)
+ {
+ DEBUGF("metada warning: smaf contents size is big %d\n", i);
+ i = MAX_PATH;
+ }
+ if (read(fd, buf, i) < i)
+ return false;
+
+ /* title */
+ if (read_option(buf, i, TAG_TITLE, codepage, id3->id3v1buf[0]))
+ id3->title = id3->id3v1buf[0];
+
+ /* artist */
+ if (read_option(buf, i, TAG_ARTIST, codepage, id3->id3v1buf[1]))
+ id3->artist = id3->id3v1buf[1];
+
+ /* composer */
+ if (read_option(buf, i, TAG_COMPOSER, codepage, id3->id3v1buf[2]))
+ id3->composer = id3->id3v1buf[2];
+ }
+
+ if (contents_size > i)
+ lseek(fd, contents_size - i, SEEK_CUR);
+
+ /* assume the SMAF pcm data position is less than 1024 bytes */
+ if (read(fd, smafbuf, 1024) < 1024)
+ return false;
+
+ buf = smafbuf;
+ while (buf + 8 < endbuf)
+ {
+ i = get_long_be(buf + 4) + 8;
+
+ if (memcmp(buf, "ATR", 3) == 0)
+ return get_smaf_metadata_audio_track(id3, buf, endbuf);
+ else if (memcmp(buf, "MTR", 3) == 0)
+ return get_smaf_metadata_score_track(id3, buf, endbuf);
+
+ buf += i;
+ }
+
+ DEBUGF("metada error: smaf does not include track chunk\n");
+ return false;
+}