1 /*
2 * ALURE OpenAL utility library
3 * Copyright (c) 2009-2010 by Chris Robinson.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include "config.h"
25
26 #include "main.h"
27
28 #include <string.h>
29 #include <assert.h>
30
31 #include <istream>
32
33 #include <libmodplug/modplug.h>
34
35
36 #ifdef DYNLOAD
37 static void *mod_handle;
38 #define MAKE_FUNC(x) static typeof(x)* p##x
39 MAKE_FUNC(ModPlug_Load);
40 MAKE_FUNC(ModPlug_Unload);
41 MAKE_FUNC(ModPlug_Read);
42 MAKE_FUNC(ModPlug_SeekOrder);
43 #undef MAKE_FUNC
44
45 #define ModPlug_Load pModPlug_Load
46 #define ModPlug_Unload pModPlug_Unload
47 #define ModPlug_Read pModPlug_Read
48 #define ModPlug_SeekOrder pModPlug_SeekOrder
49 #else
50 #define mod_handle 1
51 #endif
52
53
54 struct modStream : public alureStream {
55 private:
56 ModPlugFile *modFile;
57 int lastOrder;
58
59 public:
60 #ifdef DYNLOAD
InitmodStream61 static void Init()
62 {
63 #ifdef _WIN32
64 #define MODPLUG_LIB "libmodplug.dll"
65 #elif defined(__APPLE__)
66 #define MODPLUG_LIB "libmodplug.1.dylib"
67 #else
68 #define MODPLUG_LIB "libmodplug.so.1"
69 #endif
70 mod_handle = OpenLib(MODPLUG_LIB);
71 if(!mod_handle) return;
72
73 LOAD_FUNC(mod_handle, ModPlug_Load);
74 LOAD_FUNC(mod_handle, ModPlug_Unload);
75 LOAD_FUNC(mod_handle, ModPlug_Read);
76 LOAD_FUNC(mod_handle, ModPlug_SeekOrder);
77 }
DeinitmodStream78 static void Deinit()
79 {
80 if(mod_handle)
81 CloseLib(mod_handle);
82 mod_handle = NULL;
83 }
84 #else
85 static void Init() { }
86 static void Deinit() { }
87 #endif
88
IsValidmodStream89 virtual bool IsValid()
90 { return modFile != NULL; }
91
GetFormatmodStream92 virtual bool GetFormat(ALenum *fmt, ALuint *frequency, ALuint *blockalign)
93 {
94 *fmt = AL_FORMAT_STEREO16;
95 *frequency = 44100;
96 *blockalign = 2 * sizeof(ALshort);
97 return true;
98 }
99
GetDatamodStream100 virtual ALuint GetData(ALubyte *data, ALuint bytes)
101 {
102 int ret = ModPlug_Read(modFile, data, bytes);
103 if(ret < 0) return 0;
104 return ret;
105 }
106
RewindmodStream107 virtual bool Rewind()
108 { return SetOrder(lastOrder); }
109
SetOrdermodStream110 virtual bool SetOrder(ALuint order)
111 {
112 std::vector<char> data(16384);
113 ALuint total = 0;
114 while(1)
115 {
116 fstream->read(&data[total], data.size()-total);
117 if(fstream->gcount() == 0) break;
118 total += fstream->gcount();
119 data.resize(total*2);
120 }
121 data.resize(total);
122
123 ModPlugFile *newMod = ModPlug_Load(&data[0], data.size());
124 if(!newMod)
125 {
126 SetError("Could not reload data");
127 return false;
128 }
129 ModPlug_Unload(modFile);
130 modFile = newMod;
131
132 // There seems to be no way to tell if the seek succeeds
133 ModPlug_SeekOrder(modFile, order);
134 lastOrder = order;
135
136 return true;
137 }
138
modStreammodStream139 modStream(std::istream *_fstream)
140 : alureStream(_fstream), modFile(NULL), lastOrder(0)
141 {
142 if(!mod_handle) return;
143
144 std::vector<char> data(1024);
145 ALuint total = 0;
146
147 fstream->read(&data[total], data.size()-total);
148 total += fstream->gcount();
149 if(total < 32) return;
150
151 if(memcmp(&data[0], "Extended Module: ", 17) == 0 || /* XM */
152 (data[28] == 0x1A && data[29] == 0x10) || /* S3M */
153 memcmp(&data[0], "IMPM", 4) == 0) /* IT */
154 {
155 while(1)
156 {
157 data.resize(total*2);
158 fstream->read(&data[total], data.size()-total);
159 if(fstream->gcount() == 0) break;
160 total += fstream->gcount();
161 }
162 data.resize(total);
163
164 modFile = ModPlug_Load(&data[0], data.size());
165 }
166 }
167
~modStreammodStream168 virtual ~modStream()
169 {
170 if(modFile)
171 ModPlug_Unload(modFile);
172 modFile = NULL;
173 }
174 };
175 // Priority = -1, because mod loading can find false-positives
176 static DecoderDecl<modStream,-1> modStream_decoder;
alure_init_modplug(void)177 Decoder &alure_init_modplug(void)
178 { return modStream_decoder; }
179