commit asap codec. plays .sap files. At the moment it only plays the default song. So subSongs are ignored.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18121 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 256 insertions, 0 deletions

diff --git a/apps/metadata/asap.c b/apps/metadata/asap.c
new file mode 100644
index 0000000000..7e635a30e8
--- /dev/null
+++ b/apps/metadata/asap.c
@@ -0,0 +1,256 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: asap.c 17847 2008-06-28 18:10:04Z domonoky $
+ *
+ * Copyright (C) 2008 Dominik Wenger
+ *
+ * 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 "id3.h"
+#include "metadata_common.h"
+#include "metadata_parsers.h"
+#include "rbunicode.h"
+#include "debug.h"
+
+#define MAX_SONGS  32
+
+struct module_info
+{
+    char name[255];
+    char author[255];
+    char date[255];
+    int numSongs;
+    int defSong;
+    int numChannels;
+    int durations[32];
+    int loops[32];
+};
+
+static bool parse_dec(int *retval, const char *p, int minval, int maxval)
+{
+    int r = 0;
+    do {
+        char c = *p;
+        if (c >= '0' && c <= '9')
+            r = 10 * r + c - '0';
+        else
+            return false;
+        if (r > maxval)
+            return false;
+    } while (*++p != '\0');
+    if (r < minval)
+        return false;
+    *retval = r;
+    return true;
+}
+
+static bool parse_text(char *retval, const char *p)
+{
+    int i;
+    if (*p != '"')
+        return false;
+    p++;
+    if (p[0] == '<' && p[1] == '?' && p[2] == '>' && p[3] == '"')
+        return true;
+    i = 0;
+    while (*p != '"') {
+        if (i >= 127)
+            return false;
+        if (*p == '\0')
+            return false;
+        retval[i++] = *p++;
+    }
+    retval[i] = '\0';
+    return true;
+}
+
+static int ASAP_ParseDuration(const char *s)
+{
+    int r;
+    if (*s < '0' || *s > '9')
+        return -1;
+    r = *s++ - '0';
+    if (*s >= '0' && *s <= '9')
+        r = 10 * r + *s++ - '0';
+    if (*s == ':') {
+        s++;
+        if (*s < '0' || *s > '5')
+            return -1;
+        r = 60 * r + (*s++ - '0') * 10;
+        if (*s < '0' || *s > '9')
+            return -1;
+        r += *s++ - '0';
+    }
+    r *= 1000;
+    if (*s != '.')
+        return r;
+    s++;
+    if (*s < '0' || *s > '9')
+        return r;
+    r += 100 * (*s++ - '0');
+    if (*s < '0' || *s > '9')
+        return r;
+    r += 10 * (*s++ - '0');
+    if (*s < '0' || *s > '9')
+        return r;
+    r += *s - '0';
+    return r;
+}
+
+static bool parse_sap_header(int fd,struct module_info* info,int file_len)
+{
+    int module_index = 0;
+    int sap_signature = -1;
+    int duration_index = 0;
+    unsigned char cur_char = 0; 
+    int i;
+    
+    /* set defaults */
+    
+    info->numSongs=1;
+    info->defSong=0;
+    info->numChannels=1;
+    for (i = 0; i < MAX_SONGS; i++) {
+        info->durations[i] = -1;
+        info->loops[i] = 0;
+    }
+    
+    /* parse file */
+    while (1)
+    {
+        char line[256];
+        char *p;
+        
+        if (module_index + 8 >= file_len)
+            return false;
+        /* read a char */
+        read(fd,&cur_char,1);
+        /* end of header */
+        if (cur_char == 0xff)
+            break;
+            
+        i = 0;
+        while (cur_char != 0x0d) 
+        {
+            line[i++] = cur_char; 
+            module_index++;
+            if (module_index >= file_len || (unsigned)i >= sizeof(line) - 1)
+                return false;
+            /* read a char */
+            read(fd,&cur_char,1);
+        }
+        if (++module_index >= file_len )
+            return false;
+        /* read a char */
+        read(fd,&cur_char,1);
+        if ( cur_char != 0x0a)    
+            return false;    
+            
+        line[i] = '\0';
+       for (p = line; *p != '\0'; p++) {
+            if (*p == ' ') {
+                *p++ = '\0';
+                break;
+            }
+        }
+        
+        /* parse tags */
+        if(strcmp(line, "SAP") == 0)
+            sap_signature = 1;
+        if (sap_signature == -1)
+            return false;
+        if (strcmp(line,"AUTHOR") == 0)
+        {
+            if (parse_text(info->author, p) == false )
+                return false; 
+        }
+        else if(strcmp(line,"NAME")==0)
+        {
+            if (parse_text(info->name, p) == false)
+                return false; 
+        }
+        else if(strcmp(line,"DATE")==0)
+        {
+            if (parse_text(info->date, p) == false)
+                return false; 
+        }
+        else if (strcmp(line,"SONGS")==0)
+        {
+            if (parse_dec(&info->numSongs, p,1,MAX_SONGS) == false )
+                return false; 
+        }
+        else if (strcmp(line,"DEFSONG")==0)
+        {
+            if (parse_dec(&info->defSong, p,0,MAX_SONGS) == false)
+                return false; 
+        }
+        else if (strcmp(line,"STEREO")==0)
+        {
+            info->numChannels = 2;
+        }       
+        else if (strcmp(line,"TIME") == 0) 
+        {
+            int duration = ASAP_ParseDuration(p);
+            if (duration < 0 || duration_index >= MAX_SONGS)
+                return false;
+            info->durations[duration_index] = duration;
+            if (strstr(p, "LOOP") != NULL)
+                info->loops[duration_index] = 1;
+            duration_index++;
+        }
+    }    
+    
+    lseek(fd,0,SEEK_SET);
+    return true;
+}
+
+
+bool get_asap_metadata(int fd, struct mp3entry* id3)
+{        
+    char *buf = id3->id3v2buf;
+
+    int filelength = filesize(fd);
+    struct module_info *info;
+    info = (struct module_info *) buf;
+ 
+    if(parse_sap_header(fd,info,filelength) == false)
+    {
+        DEBUGF("parse sap header failed.\n");
+        return false;
+    }   
+
+    id3->title = info->name;
+    id3->artist = info->author;
+    id3->year_string = info->date;
+    int length =  info->durations[info->defSong];
+    if (length < 0)
+        length = 180 * 1000;
+    id3->length = length;
+        
+    id3->bitrate = 706;
+    id3->frequency = 44100;
+
+    id3->vbr = false;
+    id3->filesize = filelength;
+    
+    return true;
+}