forked from SDL-mirror/SDL_mixer
-
Notifications
You must be signed in to change notification settings - Fork 0
/
music_modplug.c
310 lines (270 loc) · 8.52 KB
/
music_modplug.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/*
SDL_mixer: An audio mixer library based on the SDL library
Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifdef MUSIC_MOD_MODPLUG
#include "SDL_loadso.h"
#include "music_modplug.h"
#ifdef MODPLUG_HEADER
#include MODPLUG_HEADER
#else
#include <libmodplug/modplug.h>
#endif
typedef struct {
int loaded;
void *handle;
ModPlugFile* (*ModPlug_Load)(const void* data, int size);
void (*ModPlug_Unload)(ModPlugFile* file);
int (*ModPlug_Read)(ModPlugFile* file, void* buffer, int size);
void (*ModPlug_Seek)(ModPlugFile* file, int millisecond);
void (*ModPlug_GetSettings)(ModPlug_Settings* settings);
void (*ModPlug_SetSettings)(const ModPlug_Settings* settings);
void (*ModPlug_SetMasterVolume)(ModPlugFile* file,unsigned int cvol) ;
} modplug_loader;
static modplug_loader modplug = {
0, NULL
};
static ModPlug_Settings settings;
#ifdef MODPLUG_DYNAMIC
#define FUNCTION_LOADER(FUNC, SIG) \
modplug.FUNC = (SIG) SDL_LoadFunction(modplug.handle, #FUNC); \
if (modplug.FUNC == NULL) { SDL_UnloadObject(modplug.handle); return -1; }
#else
#define FUNCTION_LOADER(FUNC, SIG) \
modplug.FUNC = FUNC;
#endif
static int MODPLUG_Load(void)
{
if (modplug.loaded == 0) {
#ifdef MODPLUG_DYNAMIC
modplug.handle = SDL_LoadObject(MODPLUG_DYNAMIC);
if (modplug.handle == NULL) {
return -1;
}
#elif defined(__MACOSX__)
extern ModPlugFile* ModPlug_Load(const void* data, int size) __attribute__((weak_import));
if (ModPlug_Load == NULL)
{
/* Missing weakly linked framework */
Mix_SetError("Missing modplug.framework");
return -1;
}
#endif
FUNCTION_LOADER(ModPlug_Load, ModPlugFile* (*)(const void* data, int size))
FUNCTION_LOADER(ModPlug_Unload, void (*)(ModPlugFile* file))
FUNCTION_LOADER(ModPlug_Read, int (*)(ModPlugFile* file, void* buffer, int size))
FUNCTION_LOADER(ModPlug_Seek, void (*)(ModPlugFile* file, int millisecond))
FUNCTION_LOADER(ModPlug_GetSettings, void (*)(ModPlug_Settings* settings))
FUNCTION_LOADER(ModPlug_SetSettings, void (*)(const ModPlug_Settings* settings))
FUNCTION_LOADER(ModPlug_SetMasterVolume, void (*)(ModPlugFile* file,unsigned int cvol))
}
++modplug.loaded;
return 0;
}
static void MODPLUG_Unload(void)
{
if (modplug.loaded == 0) {
return;
}
if (modplug.loaded == 1) {
#ifdef MODPLUG_DYNAMIC
SDL_UnloadObject(modplug.handle);
#endif
}
--modplug.loaded;
}
typedef struct
{
int play_count;
ModPlugFile *file;
SDL_AudioStream *stream;
void *buffer;
int buffer_size;
} MODPLUG_Music;
static int MODPLUG_Seek(void *context, double position);
static void MODPLUG_Delete(void *context);
static int MODPLUG_Open(const SDL_AudioSpec *spec)
{
/* ModPlug supports U8 or S16 audio output */
modplug.ModPlug_GetSettings(&settings);
settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;
if (spec->channels == 1) {
settings.mChannels = 1;
} else {
settings.mChannels = 2;
}
if (SDL_AUDIO_BITSIZE(spec->format) == 8) {
settings.mBits = 8;
} else {
settings.mBits = 16;
}
if (spec->freq >= 44100) {
settings.mFrequency = 44100;
} else if (spec->freq >= 22050) {
settings.mFrequency = 22050;
} else {
settings.mFrequency = 11025;
}
settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
settings.mReverbDepth = 0;
settings.mReverbDelay = 100;
settings.mBassAmount = 0;
settings.mBassRange = 50;
settings.mSurroundDepth = 0;
settings.mSurroundDelay = 10;
settings.mLoopCount = 0;
modplug.ModPlug_SetSettings(&settings);
return 0;
}
/* Load a modplug stream from an SDL_RWops object */
void *MODPLUG_CreateFromRW(SDL_RWops *src, int freesrc)
{
MODPLUG_Music *music;
void *buffer;
size_t size;
music = (MODPLUG_Music *)SDL_calloc(1, sizeof(*music));
if (!music) {
SDL_OutOfMemory();
return NULL;
}
music->stream = SDL_NewAudioStream((settings.mBits == 8) ? AUDIO_U8 : AUDIO_S16SYS, settings.mChannels, settings.mFrequency,
music_spec.format, music_spec.channels, music_spec.freq);
if (!music->stream) {
MODPLUG_Delete(music);
return NULL;
}
music->buffer_size = music_spec.samples * (settings.mBits / 8) * settings.mChannels;
music->buffer = SDL_malloc(music->buffer_size);
if (!music->buffer) {
MODPLUG_Delete(music);
return NULL;
}
buffer = SDL_LoadFile_RW(src, &size, SDL_FALSE);
if (buffer) {
music->file = modplug.ModPlug_Load(buffer, (int)size);
if (!music->file) {
Mix_SetError("ModPlug_Load failed");
}
SDL_free(buffer);
}
if (!music->file) {
MODPLUG_Delete(music);
return NULL;
}
if (freesrc) {
SDL_RWclose(src);
}
return music;
}
/* Set the volume for a modplug stream */
static void MODPLUG_SetVolume(void *context, int volume)
{
MODPLUG_Music *music = (MODPLUG_Music *)context;
modplug.ModPlug_SetMasterVolume(music->file, volume*4);
}
/* Start playback of a given modplug stream */
static int MODPLUG_Play(void *context, int play_count)
{
MODPLUG_Music *music = (MODPLUG_Music *)context;
music->play_count = play_count;
return MODPLUG_Seek(music, 0.0);
}
/* Play some of a stream previously started with modplug_play() */
static int MODPLUG_GetSome(void *context, void *data, int bytes, SDL_bool *done)
{
MODPLUG_Music *music = (MODPLUG_Music *)context;
int filled, amount;
filled = SDL_AudioStreamGet(music->stream, data, bytes);
if (filled != 0) {
return filled;
}
if (!music->play_count) {
/* All done */
*done = SDL_TRUE;
return 0;
}
amount = modplug.ModPlug_Read(music->file, music->buffer, music->buffer_size);
if (amount > 0) {
if (SDL_AudioStreamPut(music->stream, music->buffer, amount) < 0) {
return -1;
}
} else {
if (music->play_count == 1) {
music->play_count = 0;
SDL_AudioStreamFlush(music->stream);
} else {
int play_count = -1;
if (music->play_count > 0) {
play_count = (music->play_count - 1);
}
if (MODPLUG_Play(music, play_count) < 0) {
return -1;
}
}
}
return 0;
}
static int MODPLUG_GetAudio(void *context, void *data, int bytes)
{
return music_pcm_getaudio(context, data, bytes, MIX_MAX_VOLUME, MODPLUG_GetSome);
}
/* Jump (seek) to a given position */
static int MODPLUG_Seek(void *context, double position)
{
MODPLUG_Music *music = (MODPLUG_Music *)context;
modplug.ModPlug_Seek(music->file, (int)(position*1000));
return 0;
}
/* Close the given modplug stream */
static void MODPLUG_Delete(void *context)
{
MODPLUG_Music *music = (MODPLUG_Music *)context;
if (music->file) {
modplug.ModPlug_Unload(music->file);
}
if (music->stream) {
SDL_FreeAudioStream(music->stream);
}
if (music->buffer) {
SDL_free(music->buffer);
}
SDL_free(music);
}
Mix_MusicInterface Mix_MusicInterface_MODPLUG =
{
"MODPLUG",
MIX_MUSIC_MODPLUG,
MUS_MOD,
SDL_FALSE,
SDL_FALSE,
MODPLUG_Load,
MODPLUG_Open,
MODPLUG_CreateFromRW,
NULL, /* CreateFromFile */
MODPLUG_SetVolume,
MODPLUG_Play,
NULL, /* IsPlaying */
MODPLUG_GetAudio,
MODPLUG_Seek,
NULL, /* Pause */
NULL, /* Resume */
NULL, /* Stop */
MODPLUG_Delete,
NULL, /* Close */
MODPLUG_Unload,
};
#endif /* MUSIC_MOD_MODPLUG */
/* vi: set ts=4 sw=4 expandtab: */