From 5915736dd5f88ba644189b4f25df56c7c3cb855d Mon Sep 17 00:00:00 2001
From: Thom Johansen <thomj@rockbox.org>
Date: Tue, 4 Dec 2007 20:48:40 +0000
Subject: Put A52/AC3 metadata parser in its own file. Cosmetic changes in
 metadata.c. Remove some unneeded headers from MPC metadata parser.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15874 a1c6a512-1295-4272-9138-f99709370657
---
 apps/metadata.c | 78 ++++++---------------------------------------------------
 1 file changed, 8 insertions(+), 70 deletions(-)

(limited to 'apps/metadata.c')

diff --git a/apps/metadata.c b/apps/metadata.c
index 0d69cb1645..556350bfb6 100644
--- a/apps/metadata.c
+++ b/apps/metadata.c
@@ -36,24 +36,6 @@
 #include "metadata/metadata_common.h"
 #include "metadata/metadata_parsers.h"
 
-static const unsigned short a52_bitrates[] =
-{
-     32,  40,  48,  56,  64,  80,  96, 112, 128, 160, 
-    192, 224, 256, 320, 384, 448, 512, 576, 640
-};
-
-/* Only store frame sizes for 44.1KHz - others are simply multiples 
-   of the bitrate */
-static const unsigned short a52_441framesizes[] =
-{
-      69 * 2,   70 * 2,   87 * 2,   88 * 2,  104 * 2,  105 * 2,  121 * 2, 
-     122 * 2,  139 * 2,  140 * 2,  174 * 2,  175 * 2,  208 * 2,  209 * 2,
-     243 * 2,  244 * 2,  278 * 2,  279 * 2,  348 * 2,  349 * 2,  417 * 2,
-     418 * 2,  487 * 2,  488 * 2,  557 * 2,  558 * 2,  696 * 2,  697 * 2,  
-     835 * 2,  836 * 2,  975 * 2,  976 * 2, 1114 * 2, 1115 * 2, 1253 * 2, 
-    1254 * 2, 1393 * 2, 1394 * 2
-};
-
 #endif /* CONFIG_CODEC == SWCODEC */
 
 
@@ -100,8 +82,6 @@ bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
 {
 #if CONFIG_CODEC == SWCODEC
     unsigned char* buf;
-    unsigned long totalsamples;
-    int i;
 #endif
 
     /* Clear the mp3entry to avoid having bogus pointers appear */
@@ -179,64 +159,19 @@ bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
 
     case AFMT_WAVPACK:
         if (!get_wavpack_metadata(fd, id3))
+        {
             return false;
+        }
 
         read_ape_tags(fd, id3);     /* use any apetag info we find */
         break;
 
     case AFMT_A52:
-        /* Use the trackname part of the id3 structure as a temporary buffer */
-        buf = (unsigned char *)id3->path;
-        
-        if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 5) < 5))
-        {
-            return false;
-        }
-
-        if ((buf[0] != 0x0b) || (buf[1] != 0x77)) 
-        { 
-            logf("%s is not an A52/AC3 file\n",trackname);
-            return false;
-        }
-
-        i = buf[4] & 0x3e;
-      
-        if (i > 36) 
-        {
-            logf("A52: Invalid frmsizecod: %d\n",i);
-            return false;
-        }
-      
-        id3->bitrate = a52_bitrates[i >> 1];
-        id3->vbr = false;
-        id3->filesize = filesize(fd);
-
-        switch (buf[4] & 0xc0) 
+        if (!get_a52_metadata(fd, id3))
         {
-        case 0x00: 
-            id3->frequency = 48000;
-            id3->bytesperframe=id3->bitrate * 2 * 2;
-            break;
-            
-        case 0x40: 
-            id3->frequency = 44100;
-            id3->bytesperframe = a52_441framesizes[i];
-            break;
-        
-        case 0x80: 
-            id3->frequency = 32000;
-            id3->bytesperframe = id3->bitrate * 3 * 2;
-            break;
-        
-        default: 
-            logf("A52: Invalid samplerate code: 0x%02x\n", buf[4] & 0xc0);
             return false;
-            break;
         }
 
-        /* One A52 frame contains 6 blocks, each containing 256 samples */
-        totalsamples = id3->filesize / id3->bytesperframe * 6 * 256;
-        id3->length = totalsamples / id3->frequency * 1000;
         break;
 
     case AFMT_ALAC:
@@ -264,15 +199,17 @@ bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
             return false;
         }
         break;
+
     case AFMT_SPC:
-        if(!get_spc_metadata(fd, id3))
+        if (!get_spc_metadata(fd, id3))
         {
             DEBUGF("get_spc_metadata error\n");
+            return false;
         }
-
         id3->filesize = filesize(fd);
         id3->genre_string = id3_get_num_genre(36);
         break;
+
     case AFMT_ADX:
         if (!get_adx_metadata(fd, id3))
         {
@@ -281,6 +218,7 @@ bool get_metadata(struct mp3entry* id3, int fd, const char* trackname)
         }
         
         break;
+
     case AFMT_NSF:
         buf = (unsigned char *)id3->path;
         if ((lseek(fd, 0, SEEK_SET) < 0) || ((read(fd, buf, 8)) < 8))
-- 
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