2823a4c8 |
1 | |
2 | /* |
3 | GP2X minimal library v0.5 by rlyeh, 2005. |
4 | |
5 | + GP2X video library with double buffering. |
6 | + GP2X soundring buffer library with double buffering. |
7 | + GP2X joystick library. |
8 | |
9 | Thanks to Squidge, Robster, snaff and NK, for the help & previous work! :-) |
10 | |
11 | |
12 | What's new |
13 | ========== |
14 | |
15 | 0.5: patched sound for real stereo (using NK's solution); better init code. |
16 | |
17 | 0.4: lots of cleanups; sound is threaded now, double buffered too; 8 bpp video support; better exiting code. |
18 | |
19 | 0.3: shorter library; improved joystick diagonal detection. |
20 | |
21 | 0.2: better code layout; public release. |
22 | |
23 | 0.1: beta release |
24 | */ |
25 | |
26 | #include <stdlib.h> |
27 | #include <stdio.h> |
28 | #include <unistd.h> |
29 | #include <fcntl.h> |
30 | #include <sys/mman.h> |
31 | #include <sys/ioctl.h> |
32 | #include <sys/soundcard.h> |
33 | #include <linux/fb.h> |
34 | #include <pthread.h> |
35 | #include "gp2xminilib.h" |
36 | |
37 | extern void gp2x_sound_frame(void *blah, void *bufferg, int samples); |
38 | |
39 | |
40 | |
41 | unsigned long gp2x_dev[4]={0,0,0,0}, gp2x_physvram[4]; |
42 | unsigned short *gp2x_memregs, *gp2x_screen15, *gp2x_logvram15[2], gp2x_sound_buffer[4+(44100*2)*4]; //*2=stereo, *4=max buffers |
43 | volatile unsigned short gp2x_palette[512][2]; |
44 | unsigned char *gp2x_screen8, *gp2x_logvram8[2]; |
45 | pthread_t gp2x_sound_thread=0, gp2x_sound_thread_exit=0; |
46 | |
47 | void gp2x_video_flip(void) |
48 | { |
49 | unsigned long address=gp2x_physvram[gp2x_physvram[3]]; |
50 | |
51 | gp2x_screen15=gp2x_logvram15[gp2x_physvram[3]^=1]; |
52 | gp2x_screen8 =gp2x_logvram8 [gp2x_physvram[3] ]; |
53 | |
54 | gp2x_memregs[0x290E>>1]=(unsigned short)(address & 0xffff); |
55 | gp2x_memregs[0x2910>>1]=(unsigned short)(address >> 16); |
56 | gp2x_memregs[0x2912>>1]=(unsigned short)(address & 0xffff); |
57 | gp2x_memregs[0x2914>>1]=(unsigned short)(address >> 16); |
58 | } |
59 | |
60 | void gp2x_video_setpalette(void) |
61 | {int i; |
62 | gp2x_memregs[0x2958>>1]=0; |
63 | for(i=0; i<512; i++) gp2x_memregs[0x295A>>1]=gp2x_palette[i][0], gp2x_memregs[0x295A>>1]=gp2x_palette[i][1]; |
64 | } |
65 | |
66 | unsigned long gp2x_joystick_read(void) |
67 | { |
68 | unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); |
69 | |
70 | if(value==0xFD) value=0xFA; |
71 | if(value==0xF7) value=0xEB; |
72 | if(value==0xDF) value=0xAF; |
73 | if(value==0x7F) value=0xBE; |
74 | |
75 | return ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16)); |
76 | } |
77 | |
78 | #if 0 |
79 | void *gp2x_sound_play(void *blah) |
80 | { |
81 | struct timespec ts; |
82 | int flip=0; |
83 | |
84 | ts.tv_sec=0, ts.tv_nsec=gp2x_sound_buffer[2]; |
85 | |
86 | while(! gp2x_sound_thread_exit) |
87 | { |
88 | gp2x_sound_frame(blah, (void *)(&gp2x_sound_buffer[4+flip]), gp2x_sound_buffer[0]); |
89 | write(gp2x_dev[3], (void *)(&gp2x_sound_buffer[4+flip]), gp2x_sound_buffer[1]); |
90 | |
91 | flip^=gp2x_sound_buffer[1]; |
92 | |
93 | //nanosleep(&ts, NULL); |
94 | } |
95 | |
96 | return NULL; |
97 | } |
98 | #endif |
99 | |
100 | void gp2x_deinit(void) |
101 | {int i; |
102 | if(gp2x_sound_thread) { gp2x_sound_thread_exit=1; for(i=0;i<1000000;i++); } |
103 | |
104 | gp2x_memregs[0x28DA>>1]=0x4AB; |
105 | gp2x_memregs[0x290C>>1]=640; |
106 | |
107 | close(gp2x_dev[0]); |
108 | close(gp2x_dev[1]); |
109 | close(gp2x_dev[2]); |
110 | //close(gp2x_dev[3]); |
111 | //fcloseall(); |
112 | } |
113 | |
114 | void gp2x_init(int bpp, int rate, int bits, int stereo, int Hz) |
115 | { |
116 | struct fb_fix_screeninfo fixed_info; |
117 | |
118 | if(!gp2x_dev[0]) gp2x_dev[0] = open("/dev/fb0", O_RDWR); |
119 | if(!gp2x_dev[1]) gp2x_dev[1] = open("/dev/fb1", O_RDWR); |
120 | if(!gp2x_dev[2]) gp2x_dev[2] = open("/dev/mem", O_RDWR); |
121 | //if(!gp2x_dev[3]) gp2x_dev[3] = open("/dev/dsp", O_WRONLY); |
122 | |
123 | gp2x_memregs=(unsigned short *)mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, gp2x_dev[2], 0xc0000000); |
124 | |
125 | if(!gp2x_sound_thread) { gp2x_memregs[0x0F16>>1] = 0x830a; sleep(1); |
126 | gp2x_memregs[0x0F58>>1] = 0x100c; sleep(1); } |
127 | |
128 | ioctl (gp2x_dev[0], FBIOGET_FSCREENINFO, &fixed_info); |
129 | gp2x_screen15=gp2x_logvram15[0]=(unsigned short *)mmap(0, 320*240*2, PROT_WRITE, MAP_SHARED, gp2x_dev[0], 0); |
130 | gp2x_screen8=gp2x_logvram8[0]=(unsigned char *)gp2x_logvram15[0]; |
131 | gp2x_physvram[0]=fixed_info.smem_start; |
132 | |
133 | ioctl (gp2x_dev[1], FBIOGET_FSCREENINFO, &fixed_info); |
134 | gp2x_logvram15[1]=(unsigned short *)mmap(0, 320*240*2, PROT_WRITE, MAP_SHARED, gp2x_dev[1], 0); |
135 | gp2x_logvram8[1]=(unsigned char *)gp2x_logvram15[1]; |
136 | gp2x_physvram[1]=fixed_info.smem_start; |
137 | |
138 | gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/ |
139 | gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/ |
140 | |
141 | ioctl(gp2x_dev[3], SNDCTL_DSP_SPEED, &rate); |
142 | ioctl(gp2x_dev[3], SNDCTL_DSP_SETFMT, &bits); |
143 | ioctl(gp2x_dev[3], SNDCTL_DSP_STEREO, &stereo); |
144 | |
145 | gp2x_sound_buffer[1]=(gp2x_sound_buffer[0]=(rate/Hz)) << (stereo + (bits==16)); |
146 | gp2x_sound_buffer[2]=(1000000/Hz); |
147 | |
148 | if(!gp2x_sound_thread) { gp2x_sound_thread = 1; //pthread_create( &gp2x_sound_thread, NULL, gp2x_sound_play, NULL); |
149 | atexit(gp2x_deinit); } |
150 | } |
151 | |
152 | |
153 | |
154 | /* |
155 | |
156 | EXAMPLE |
157 | ======= |
158 | |
159 | now supply your own function for 16 bits, stereo: |
160 | |
161 | void gp2x_sound_frame(void *blah, void *bufferg, int samples) |
162 | { |
163 | signed short *buffer=(signed short *)bufferg; |
164 | while(samples--) |
165 | { |
166 | *buffer++=0; //Left channel |
167 | *buffer++=0; //Right channel |
168 | } |
169 | } |
170 | |
171 | or 16 bits mono: |
172 | |
173 | void gp2x_sound_frame(void *blah, void *bufferg, int samples) |
174 | { |
175 | signed short *buffer=(signed short *)bufferg; |
176 | while(samples--) |
177 | { |
178 | *buffer++=0; //Central channel |
179 | } |
180 | } |
181 | |
182 | now the main program... |
183 | |
184 | hicolor example: |
185 | |
186 | int main(int argc, char *argv[]) |
187 | { |
188 | //this sets video to hicolor (16 bpp) |
189 | //it also sets sound to 44100,16bits,stereo and syncs audio to 50 Hz (PAL timing) |
190 | |
191 | //Warning: GP2X does not support 8bit sound sampling! (at least within Linux) |
192 | |
193 | gp2x_init(16,44100,16,1,50); |
194 | |
195 | while(1) |
196 | { |
197 | unsigned long pad=gp2x_joystick_read(); |
198 | unsigned short color=gp2x_video_color15(255,255,255,0); |
199 | |
200 | if(pad & GP2X_L) if(pad & GP2X_R) exit(); |
201 | |
202 | if(pad & GP2X_A) color=gp2x_color15(255,255,255,0); //white |
203 | else color=gp2x_color15(255,0,0,0); //red |
204 | |
205 | gp2x_screen15[160+120*320]=color; //x=160, y=120 |
206 | gp2x_video_flip(); |
207 | } |
208 | } |
209 | |
210 | palettized example: |
211 | |
212 | int main(int argc, char *argv[]) |
213 | { |
214 | //this sets video to palette mode (8 bpp) |
215 | //it also sets sound to 11025,16bits,stereo and syncs audio to 60 Hz (NSTC timing) |
216 | |
217 | //Warning: GP2X does not support 8bit sound sampling! (at least within Linux) |
218 | |
219 | gp2x_init(8,11025,16,1,60); |
220 | |
221 | gp2x_video_color8(0,0,0,0); //color #0 is black for us |
222 | gp2x_video_color8(1,255,255,255); //color #1 is white for us |
223 | gp2x_video_color8(2,255,0,0); //color #2 is red for us |
224 | gp2x_video_setpalette(); |
225 | |
226 | while(1) |
227 | { |
228 | unsigned long pad=gp2x_joystick_read(); |
229 | unsigned char color; |
230 | |
231 | if(pad & GP2X_L) if(pad & GP2X_R) exit(); |
232 | |
233 | if(pad & GP2X_A) color=1; //white |
234 | else color=2; //red |
235 | |
236 | gp2x_screen8[160+120*320]=color; //x=160, y=120 |
237 | gp2x_video_flip(); |
238 | } |
239 | } |
240 | |
241 | */ |
242 | |