music_timidity.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
/*
SDL_mixer: An audio mixer library based on the SDL library
Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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.
*/
/* This file supports playing MIDI files with timidity */
#ifdef MUSIC_MID_TIMIDITY
#include "music_timidity.h"
#include "timidity/timidity.h"
31
32
33
34
35
36
37
38
39
typedef struct
{
int play_count;
MidiSong *song;
} TIMIDITY_Music;
static int TIMIDITY_Seek(void *context, double position);
40
41
static int TIMIDITY_Open(const SDL_AudioSpec *spec)
{
42
return Timidity_Init();
43
44
45
46
}
static void TIMIDITY_Close(void)
{
47
Timidity_Exit();
48
49
50
51
}
void *TIMIDITY_CreateFromRW(SDL_RWops *src, int freesrc)
{
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
TIMIDITY_Music *music;
music = (TIMIDITY_Music *)SDL_calloc(1, sizeof(*music));
if (!music) {
SDL_OutOfMemory();
return NULL;
}
music->song = Timidity_LoadSong(src, &music_spec);
if (!music->song) {
SDL_free(music);
return NULL;
}
if (freesrc) {
67
SDL_RWclose(src);
68
69
70
71
72
73
}
return music;
}
static void TIMIDITY_SetVolume(void *context, int volume)
{
74
75
TIMIDITY_Music *music = (TIMIDITY_Music *)context;
Timidity_SetVolume(music->song, volume);
78
static int TIMIDITY_Play(void *context, int play_count)
80
81
82
83
TIMIDITY_Music *music = (TIMIDITY_Music *)context;
music->play_count = play_count;
Timidity_Start(music->song);
return TIMIDITY_Seek(music, 0.0);
84
85
86
87
}
static int TIMIDITY_GetAudio(void *context, void *data, int bytes)
{
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
TIMIDITY_Music *music = (TIMIDITY_Music *)context;
if (!Timidity_PlaySome(music->song, data, bytes)) {
if (music->play_count == 1) {
/* We didn't consume anything and we're done */
music->play_count = 0;
return bytes;
} else {
int play_count = -1;
if (music->play_count > 0) {
play_count = (music->play_count - 1);
}
if (TIMIDITY_Play(music, play_count) < 0) {
return -1;
}
}
104
105
106
return 0;
}
107
static int TIMIDITY_Seek(void *context, double position)
109
110
TIMIDITY_Music *music = (TIMIDITY_Music *)context;
Timidity_Seek(music->song, (Uint32)(position * 1000));
111
return 0;
112
113
114
115
}
static void TIMIDITY_Delete(void *context)
{
116
117
118
TIMIDITY_Music *music = (TIMIDITY_Music *)context;
Timidity_FreeSong(music->song);
SDL_free(music);
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
}
Mix_MusicInterface Mix_MusicInterface_TIMIDITY =
{
"TIMIDITY",
MIX_MUSIC_TIMIDITY,
MUS_MID,
SDL_FALSE,
SDL_FALSE,
NULL, /* Load */
TIMIDITY_Open,
TIMIDITY_CreateFromRW,
NULL, /* CreateFromFile */
TIMIDITY_SetVolume,
TIMIDITY_Play,
135
NULL, /* IsPlaying */
136
TIMIDITY_GetAudio,
137
TIMIDITY_Seek,
138
139
140
141
142
143
144
145
146
147
148
NULL, /* Pause */
NULL, /* Resume */
NULL, /* Stop */
TIMIDITY_Delete,
TIMIDITY_Close,
NULL, /* Unload */
};
#endif /* MUSIC_MID_TIMIDITY */
/* vi: set ts=4 sw=4 expandtab: */