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-rw-r--r--apps/metadata/vgm.c195
1 files changed, 0 insertions, 195 deletions
diff --git a/apps/metadata/vgm.c b/apps/metadata/vgm.c
deleted file mode 100644
index 9ea95b3..0000000
--- a/apps/metadata/vgm.c
+++ /dev/null
@@ -1,195 +0,0 @@
-#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"
-
-/* Ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */
-
-typedef unsigned char byte;
-
-enum { header_size = 0x40 };
-enum { max_field = 64 };
-
-struct header_t
-{
- char tag [4];
- byte data_size [4];
- byte version [4];
- byte psg_rate [4];
- byte ym2413_rate [4];
- byte gd3_offset [4];
- byte track_duration [4];
- byte loop_offset [4];
- byte loop_duration [4];
- byte frame_rate [4];
- byte noise_feedback [2];
- byte noise_width;
- byte unused1;
- byte ym2612_rate [4];
- byte ym2151_rate [4];
- byte data_offset [4];
- byte unused2 [8];
-};
-
-static byte const* skip_gd3_str( byte const* in, byte const* end )
-{
- while ( end - in >= 2 )
- {
- in += 2;
- if ( !(in [-2] | in [-1]) )
- break;
- }
- return in;
-}
-
-static byte const* get_gd3_str( byte const* in, byte const* end, char* field )
-{
- byte const* mid = skip_gd3_str( in, end );
- int len = (mid - in) / 2 - 1;
- if ( field && len > 0 )
- {
- len = len < (int) max_field ? len : (int) max_field;
-
- field [len] = 0;
- /* Conver to utf8 */
- utf16LEdecode( in, field, len );
-
- /* Copy string back to id3v2buf */
- strcpy( (char*) in, field );
- }
- return mid;
-}
-
-static byte const* get_gd3_pair( byte const* in, byte const* end, char* field )
-{
- return skip_gd3_str( get_gd3_str( in, end, field ), end );
-}
-
-static void parse_gd3( byte const* in, byte const* end, struct mp3entry* id3 )
-{
- char* p = id3->path;
- id3->title = (char *) in;
- in = get_gd3_pair( in, end, p ); /* Song */
-
- id3->album = (char *) in;
- in = get_gd3_pair( in, end, p ); /* Game */
-
- in = get_gd3_pair( in, end, NULL ); /* System */
-
- id3->artist = (char *) in;
- in = get_gd3_pair( in, end, p ); /* Author */
-
-#if MEMORYSIZE > 2
- in = get_gd3_str ( in, end, NULL ); /* Copyright */
- in = get_gd3_pair( in, end, NULL ); /* Dumper */
-
- id3->comment = (char *) in;
- in = get_gd3_str ( in, end, p ); /* Comment */
-#endif
-}
-
-int const gd3_header_size = 12;
-
-static long check_gd3_header( byte* h, long remain )
-{
- if ( remain < gd3_header_size ) return 0;
- if ( memcmp( h, "Gd3 ", 4 ) ) return 0;
- if ( get_long_le( h + 4 ) >= 0x200 ) return 0;
-
- long gd3_size = get_long_le( h + 8 );
- if ( gd3_size > remain - gd3_header_size )
- gd3_size = remain - gd3_header_size;
-
- return gd3_size;
-}
-
-static void get_vgm_length( struct header_t* h, struct mp3entry* id3 )
-{
- long length = get_long_le( h->track_duration ) * 10 / 441;
- if ( length > 0 )
- {
- long loop_length = 0, intro_length = 0;
- long loop = get_long_le( h->loop_duration );
- if ( loop > 0 && get_long_le( h->loop_offset ) )
- {
- loop_length = loop * 10 / 441;
- intro_length = length - loop_length;
- }
- else
- {
- intro_length = length; /* make it clear that track is no longer than length */
- loop_length = 0;
- }
-
- id3->length = intro_length + 2 * loop_length; /* intro + 2 loops */
- return;
- }
-
- id3->length = 150 * 1000; /* 2.5 minutes */
-}
-
-bool get_vgm_metadata(int fd, struct mp3entry* id3)
-{
- /* Use the id3v2 part of the id3 structure as a temporary buffer */
- unsigned char* buf = (unsigned char *)id3->id3v2buf;
- int read_bytes;
-
- memset(buf, 0, ID3V2_BUF_SIZE);
- if ((lseek(fd, 0, SEEK_SET) < 0)
- || ((read_bytes = read(fd, buf, header_size)) < header_size))
- {
- return false;
- }
-
- id3->vbr = false;
- id3->filesize = filesize(fd);
-
- id3->bitrate = 706;
- id3->frequency = 44100;
-
- /* If file is gzipped, will get metadata later */
- if (memcmp(buf, "Vgm ", 4))
- {
- /* We must set a default song length here because
- the codec can't do it anymore */
- id3->length = 150 * 1000; /* 2.5 minutes */
- return true;
- }
-
- /* Get song length from header */
- struct header_t* header = (struct header_t*) buf;
- get_vgm_length( header, id3 );
-
- long gd3_offset = get_long_le( header->gd3_offset ) - 0x2C;
-
- /* No gd3 tag found */
- if ( gd3_offset < 0 )
- return true;
-
- /* Seek to gd3 offset and read as
- many bytes posible */
- gd3_offset = id3->filesize - (header_size + gd3_offset);
- if ((lseek(fd, -gd3_offset, SEEK_END) < 0)
- || ((read_bytes = read(fd, buf, ID3V2_BUF_SIZE)) <= 0))
- return true;
-
- byte* gd3 = buf;
- long gd3_size = check_gd3_header( gd3, read_bytes );
-
- /* GD3 tag is zero */
- if ( gd3_size == 0 )
- return true;
-
- /* Finally, parse gd3 tag */
- if ( gd3 )
- parse_gd3( gd3 + gd3_header_size, gd3 + read_bytes, id3 );
-
- return true;
-}