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author | Andree Buschmann <AndreeBuschmann@t-online.de> | 2011-08-07 20:01:04 +0000 |
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committer | Andree Buschmann <AndreeBuschmann@t-online.de> | 2011-08-07 20:01:04 +0000 |
commit | acb0917556fc33681c1df5a530cf754193e67705 (patch) | |
tree | 052a47097009a210e4aed9c207bd6aa4828cc000 /apps/codecs/libgme/gb_cpu.c | |
parent | 93c6f1329a5691a8be158cefe15641bd1daf9ef8 (diff) | |
download | rockbox-acb0917556fc33681c1df5a530cf754193e67705.tar.gz rockbox-acb0917556fc33681c1df5a530cf754193e67705.zip |
Submit initial patch from FS#12176. Adds support for several new game music formats (AY, GBS, HES, KSS, SGC, VGM and VGZ) and replaces the current NSF and NSFE with a new implementation based on a port of the Game Music Emu library 'GME'. This first submit does not cover the full functionality provided by the author's original patch: Coleco-SGV is not supported, some GME-specific m3u-support has been removed and IRAM is not used yet. Further changes are very likely to follow this submit. Thanks to Mauricio Garrido.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30264 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libgme/gb_cpu.c')
-rw-r--r-- | apps/codecs/libgme/gb_cpu.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/apps/codecs/libgme/gb_cpu.c b/apps/codecs/libgme/gb_cpu.c new file mode 100644 index 0000000000..ae19cc06c1 --- /dev/null +++ b/apps/codecs/libgme/gb_cpu.c | |||
@@ -0,0 +1,53 @@ | |||
1 | // Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/ | ||
2 | |||
3 | #include "gb_cpu.h" | ||
4 | |||
5 | #include "blargg_endian.h" | ||
6 | |||
7 | /* Copyright (C) 2003-2008 Shay Green. This module is free software; you | ||
8 | can redistribute it and/or modify it under the terms of the GNU Lesser | ||
9 | General Public License as published by the Free Software Foundation; either | ||
10 | version 2.1 of the License, or (at your option) any later version. This | ||
11 | module is distributed in the hope that it will be useful, but WITHOUT ANY | ||
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
13 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more | ||
14 | details. You should have received a copy of the GNU Lesser General Public | ||
15 | License along with this module; if not, write to the Free Software Foundation, | ||
16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ | ||
17 | |||
18 | #include "blargg_source.h" | ||
19 | |||
20 | inline void set_code_page( struct Gb_Cpu* this, int i, void* p ) | ||
21 | { | ||
22 | byte* p2 = STATIC_CAST(byte*,p) - GB_CPU_OFFSET( i * page_size ); | ||
23 | this->cpu_state_.code_map [i] = p2; | ||
24 | this->cpu_state->code_map [i] = p2; | ||
25 | } | ||
26 | |||
27 | void Cpu_reset( struct Gb_Cpu* this, void* unmapped ) | ||
28 | { | ||
29 | check( this->cpu_state == &this->cpu_state_ ); | ||
30 | this->cpu_state = &this->cpu_state_; | ||
31 | |||
32 | this->cpu_state_.time = 0; | ||
33 | |||
34 | int i; | ||
35 | for ( i = 0; i < page_count + 1; ++i ) | ||
36 | set_code_page( this, i, unmapped ); | ||
37 | |||
38 | memset( &this->r, 0, sizeof this->r ); | ||
39 | |||
40 | blargg_verify_byte_order(); | ||
41 | } | ||
42 | |||
43 | void Cpu_map_code( struct Gb_Cpu* this, addr_t start, int size, void* data ) | ||
44 | { | ||
45 | // address range must begin and end on page boundaries | ||
46 | require( start % page_size == 0 ); | ||
47 | require( size % page_size == 0 ); | ||
48 | require( start + size <= mem_size ); | ||
49 | |||
50 | int offset; | ||
51 | for ( offset = 0; offset < size; offset += page_size ) | ||
52 | set_code_page( this, (start + offset) >> page_bits, STATIC_CAST(char*,data) + offset ); | ||
53 | } | ||