blargg_err_t track_info_( track_info_t* out, int ) const
{
get_vgm_length( h, out );
if ( gd3.size() )
parse_gd3( gd3.begin(), gd3.end(), out );
return 0;
}
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;
}
blargg_err_t Vgm_Emu::track_info_( track_info_t* out, int ) const
{
get_vgm_length( header(), out );
int size;
byte const* gd3 = gd3_data( &size );
if ( gd3 )
parse_gd3( gd3 + gd3_header_size, gd3 + size, out );
return 0;
}
blargg_err_t Vgm_Emu::track_info_( track_info_t* out, int ) const
{
get_vgm_length( header(), out );
int gd3_offset = get_le32( header().gd3_offset );
if ( gd3_offset <= 0 )
return (blargg_err_t)blargg_ok;
byte const* gd3 = core.file_begin() + gd3_offset + offsetof( header_t, gd3_offset );
int gd3_size = check_gd3_header( gd3, core.file_end() - gd3 );
if ( gd3_size )
{
byte const* gd3_data = gd3 + gd3_header_size;
parse_gd3( gd3_data, gd3_data + gd3_size, out );
}
return (blargg_err_t)blargg_ok;
}
