diff options
author | Franklin Wei <git@fwei.tk> | 2017-01-21 15:18:31 -0500 |
---|---|---|
committer | Franklin Wei <git@fwei.tk> | 2017-12-23 21:01:26 -0500 |
commit | a855d6202536ff28e5aae4f22a0f31d8f5b325d0 (patch) | |
tree | 8c75f224dd64ed360505afa8843d016b0d75000b /apps/plugins/sdl/src/audio/dc | |
parent | 01c6dcf6c7b9bb1ad2fa0450f99bacc5f3d3e04b (diff) | |
download | rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.tar.gz rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.zip |
Port of Duke Nukem 3D
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.
Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
Diffstat (limited to 'apps/plugins/sdl/src/audio/dc')
-rw-r--r-- | apps/plugins/sdl/src/audio/dc/SDL_dcaudio.c | 246 | ||||
-rw-r--r-- | apps/plugins/sdl/src/audio/dc/SDL_dcaudio.h | 41 | ||||
-rw-r--r-- | apps/plugins/sdl/src/audio/dc/aica.c | 271 | ||||
-rw-r--r-- | apps/plugins/sdl/src/audio/dc/aica.h | 40 |
4 files changed, 598 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.c b/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.c new file mode 100644 index 0000000000..88daa8723a --- /dev/null +++ b/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.c | |||
@@ -0,0 +1,246 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | |||
22 | */ | ||
23 | #include "SDL_config.h" | ||
24 | |||
25 | /* Output dreamcast aica */ | ||
26 | |||
27 | #include "SDL_timer.h" | ||
28 | #include "SDL_audio.h" | ||
29 | #include "../SDL_audiomem.h" | ||
30 | #include "../SDL_audio_c.h" | ||
31 | #include "../SDL_audiodev_c.h" | ||
32 | #include "SDL_dcaudio.h" | ||
33 | |||
34 | #include "aica.h" | ||
35 | #include <dc/spu.h> | ||
36 | |||
37 | /* Audio driver functions */ | ||
38 | static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec); | ||
39 | static void DCAUD_WaitAudio(_THIS); | ||
40 | static void DCAUD_PlayAudio(_THIS); | ||
41 | static Uint8 *DCAUD_GetAudioBuf(_THIS); | ||
42 | static void DCAUD_CloseAudio(_THIS); | ||
43 | |||
44 | /* Audio driver bootstrap functions */ | ||
45 | static int DCAUD_Available(void) | ||
46 | { | ||
47 | return 1; | ||
48 | } | ||
49 | |||
50 | static void DCAUD_DeleteDevice(SDL_AudioDevice *device) | ||
51 | { | ||
52 | SDL_free(device->hidden); | ||
53 | SDL_free(device); | ||
54 | } | ||
55 | |||
56 | static SDL_AudioDevice *DCAUD_CreateDevice(int devindex) | ||
57 | { | ||
58 | SDL_AudioDevice *this; | ||
59 | |||
60 | /* Initialize all variables that we clean on shutdown */ | ||
61 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); | ||
62 | if ( this ) { | ||
63 | SDL_memset(this, 0, (sizeof *this)); | ||
64 | this->hidden = (struct SDL_PrivateAudioData *) | ||
65 | SDL_malloc((sizeof *this->hidden)); | ||
66 | } | ||
67 | if ( (this == NULL) || (this->hidden == NULL) ) { | ||
68 | SDL_OutOfMemory(); | ||
69 | if ( this ) { | ||
70 | SDL_free(this); | ||
71 | } | ||
72 | return(0); | ||
73 | } | ||
74 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); | ||
75 | |||
76 | /* Set the function pointers */ | ||
77 | this->OpenAudio = DCAUD_OpenAudio; | ||
78 | this->WaitAudio = DCAUD_WaitAudio; | ||
79 | this->PlayAudio = DCAUD_PlayAudio; | ||
80 | this->GetAudioBuf = DCAUD_GetAudioBuf; | ||
81 | this->CloseAudio = DCAUD_CloseAudio; | ||
82 | |||
83 | this->free = DCAUD_DeleteDevice; | ||
84 | |||
85 | spu_init(); | ||
86 | |||
87 | return this; | ||
88 | } | ||
89 | |||
90 | AudioBootStrap DCAUD_bootstrap = { | ||
91 | "dcaudio", "Dreamcast AICA audio", | ||
92 | DCAUD_Available, DCAUD_CreateDevice | ||
93 | }; | ||
94 | |||
95 | /* This function waits until it is possible to write a full sound buffer */ | ||
96 | static void DCAUD_WaitAudio(_THIS) | ||
97 | { | ||
98 | if (this->hidden->playing) { | ||
99 | /* wait */ | ||
100 | while(aica_get_pos(0)/this->spec.samples == this->hidden->nextbuf) { | ||
101 | thd_pass(); | ||
102 | } | ||
103 | } | ||
104 | } | ||
105 | |||
106 | #define SPU_RAM_BASE 0xa0800000 | ||
107 | |||
108 | static void spu_memload_stereo8(int leftpos,int rightpos,void *src0,size_t size) | ||
109 | { | ||
110 | uint8 *src = src0; | ||
111 | uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE); | ||
112 | uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE); | ||
113 | size = (size+7)/8; | ||
114 | while(size--) { | ||
115 | unsigned lval,rval; | ||
116 | lval = *src++; | ||
117 | rval = *src++; | ||
118 | lval|= (*src++)<<8; | ||
119 | rval|= (*src++)<<8; | ||
120 | lval|= (*src++)<<16; | ||
121 | rval|= (*src++)<<16; | ||
122 | lval|= (*src++)<<24; | ||
123 | rval|= (*src++)<<24; | ||
124 | g2_write_32(left++,lval); | ||
125 | g2_write_32(right++,rval); | ||
126 | g2_fifo_wait(); | ||
127 | } | ||
128 | } | ||
129 | |||
130 | static void spu_memload_stereo16(int leftpos,int rightpos,void *src0,size_t size) | ||
131 | { | ||
132 | uint16 *src = src0; | ||
133 | uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE); | ||
134 | uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE); | ||
135 | size = (size+7)/8; | ||
136 | while(size--) { | ||
137 | unsigned lval,rval; | ||
138 | lval = *src++; | ||
139 | rval = *src++; | ||
140 | lval|= (*src++)<<16; | ||
141 | rval|= (*src++)<<16; | ||
142 | g2_write_32(left++,lval); | ||
143 | g2_write_32(right++,rval); | ||
144 | g2_fifo_wait(); | ||
145 | } | ||
146 | } | ||
147 | |||
148 | static void DCAUD_PlayAudio(_THIS) | ||
149 | { | ||
150 | SDL_AudioSpec *spec = &this->spec; | ||
151 | unsigned int offset; | ||
152 | |||
153 | if (this->hidden->playing) { | ||
154 | /* wait */ | ||
155 | while(aica_get_pos(0)/spec->samples == this->hidden->nextbuf) { | ||
156 | thd_pass(); | ||
157 | } | ||
158 | } | ||
159 | |||
160 | offset = this->hidden->nextbuf*spec->size; | ||
161 | this->hidden->nextbuf^=1; | ||
162 | /* Write the audio data, checking for EAGAIN on broken audio drivers */ | ||
163 | if (spec->channels==1) { | ||
164 | spu_memload(this->hidden->leftpos+offset,this->hidden->mixbuf,this->hidden->mixlen); | ||
165 | } else { | ||
166 | offset/=2; | ||
167 | if ((this->spec.format&255)==8) { | ||
168 | spu_memload_stereo8(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen); | ||
169 | } else { | ||
170 | spu_memload_stereo16(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen); | ||
171 | } | ||
172 | } | ||
173 | |||
174 | if (!this->hidden->playing) { | ||
175 | int mode; | ||
176 | this->hidden->playing = 1; | ||
177 | mode = (spec->format==AUDIO_S8)?SM_8BIT:SM_16BIT; | ||
178 | if (spec->channels==1) { | ||
179 | aica_play(0,mode,this->hidden->leftpos,0,spec->samples*2,spec->freq,255,128,1); | ||
180 | } else { | ||
181 | aica_play(0,mode,this->hidden->leftpos ,0,spec->samples*2,spec->freq,255,0,1); | ||
182 | aica_play(1,mode,this->hidden->rightpos,0,spec->samples*2,spec->freq,255,255,1); | ||
183 | } | ||
184 | } | ||
185 | } | ||
186 | |||
187 | static Uint8 *DCAUD_GetAudioBuf(_THIS) | ||
188 | { | ||
189 | return(this->hidden->mixbuf); | ||
190 | } | ||
191 | |||
192 | static void DCAUD_CloseAudio(_THIS) | ||
193 | { | ||
194 | aica_stop(0); | ||
195 | if (this->spec.channels==2) aica_stop(1); | ||
196 | if ( this->hidden->mixbuf != NULL ) { | ||
197 | SDL_FreeAudioMem(this->hidden->mixbuf); | ||
198 | this->hidden->mixbuf = NULL; | ||
199 | } | ||
200 | } | ||
201 | |||
202 | static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec) | ||
203 | { | ||
204 | Uint16 test_format = SDL_FirstAudioFormat(spec->format); | ||
205 | int valid_datatype = 0; | ||
206 | while ((!valid_datatype) && (test_format)) { | ||
207 | spec->format = test_format; | ||
208 | switch (test_format) { | ||
209 | /* only formats Dreamcast accepts... */ | ||
210 | case AUDIO_S8: | ||
211 | case AUDIO_S16LSB: | ||
212 | valid_datatype = 1; | ||
213 | break; | ||
214 | |||
215 | default: | ||
216 | test_format = SDL_NextAudioFormat(); | ||
217 | break; | ||
218 | } | ||
219 | } | ||
220 | |||
221 | if (!valid_datatype) { /* shouldn't happen, but just in case... */ | ||
222 | SDL_SetError("Unsupported audio format"); | ||
223 | return (-1); | ||
224 | } | ||
225 | |||
226 | if (spec->channels > 2) | ||
227 | spec->channels = 2; /* no more than stereo on the Dreamcast. */ | ||
228 | |||
229 | /* Update the fragment size as size in bytes */ | ||
230 | SDL_CalculateAudioSpec(spec); | ||
231 | |||
232 | /* Allocate mixing buffer */ | ||
233 | this->hidden->mixlen = spec->size; | ||
234 | this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen); | ||
235 | if ( this->hidden->mixbuf == NULL ) { | ||
236 | return(-1); | ||
237 | } | ||
238 | SDL_memset(this->hidden->mixbuf, spec->silence, spec->size); | ||
239 | this->hidden->leftpos = 0x11000; | ||
240 | this->hidden->rightpos = 0x11000+spec->size; | ||
241 | this->hidden->playing = 0; | ||
242 | this->hidden->nextbuf = 0; | ||
243 | |||
244 | /* We're ready to rock and roll. :-) */ | ||
245 | return(0); | ||
246 | } | ||
diff --git a/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.h b/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.h new file mode 100644 index 0000000000..fba95b3eda --- /dev/null +++ b/apps/plugins/sdl/src/audio/dc/SDL_dcaudio.h | |||
@@ -0,0 +1,41 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | #ifndef _SDL_dcaudio_h | ||
25 | #define _SDL_dcaudio_h | ||
26 | |||
27 | #include "../SDL_sysaudio.h" | ||
28 | |||
29 | /* Hidden "this" pointer for the video functions */ | ||
30 | #define _THIS SDL_AudioDevice *this | ||
31 | |||
32 | struct SDL_PrivateAudioData { | ||
33 | /* The file descriptor for the audio device */ | ||
34 | Uint8 *mixbuf; | ||
35 | Uint32 mixlen; | ||
36 | int playing; | ||
37 | int leftpos,rightpos; | ||
38 | int nextbuf; | ||
39 | }; | ||
40 | |||
41 | #endif /* _SDL_dcaudio_h */ | ||
diff --git a/apps/plugins/sdl/src/audio/dc/aica.c b/apps/plugins/sdl/src/audio/dc/aica.c new file mode 100644 index 0000000000..b6a1c93644 --- /dev/null +++ b/apps/plugins/sdl/src/audio/dc/aica.c | |||
@@ -0,0 +1,271 @@ | |||
1 | /* This file is part of the Dreamcast function library. | ||
2 | * Please see libdream.c for further details. | ||
3 | * | ||
4 | * (c)2000 Dan Potter | ||
5 | * modify BERO | ||
6 | */ | ||
7 | #include "aica.h" | ||
8 | |||
9 | #include <arch/irq.h> | ||
10 | #include <dc/spu.h> | ||
11 | |||
12 | /* #define dc_snd_base ((volatile unsigned char *)0x00800000) */ /* arm side */ | ||
13 | #define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */ | ||
14 | |||
15 | /* Some convienence macros */ | ||
16 | #define SNDREGADDR(x) (0xa0700000 + (x)) | ||
17 | #define CHNREGADDR(ch,x) SNDREGADDR(0x80*(ch)+(x)) | ||
18 | |||
19 | |||
20 | #define SNDREG32(x) (*(volatile unsigned long *)SNDREGADDR(x)) | ||
21 | #define SNDREG8(x) (*(volatile unsigned char *)SNDREGADDR(x)) | ||
22 | #define CHNREG32(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x)) | ||
23 | #define CHNREG8(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x)) | ||
24 | |||
25 | #define G2_LOCK(OLD) \ | ||
26 | do { \ | ||
27 | if (!irq_inside_int()) \ | ||
28 | OLD = irq_disable(); \ | ||
29 | /* suspend any G2 DMA here... */ \ | ||
30 | while((*(volatile unsigned int *)0xa05f688c) & 0x20) \ | ||
31 | ; \ | ||
32 | } while(0) | ||
33 | |||
34 | #define G2_UNLOCK(OLD) \ | ||
35 | do { \ | ||
36 | /* resume any G2 DMA here... */ \ | ||
37 | if (!irq_inside_int()) \ | ||
38 | irq_restore(OLD); \ | ||
39 | } while(0) | ||
40 | |||
41 | |||
42 | void aica_init() { | ||
43 | int i, j, old = 0; | ||
44 | |||
45 | /* Initialize AICA channels */ | ||
46 | G2_LOCK(old); | ||
47 | SNDREG32(0x2800) = 0x0000; | ||
48 | |||
49 | for (i=0; i<64; i++) { | ||
50 | for (j=0; j<0x80; j+=4) { | ||
51 | if ((j&31)==0) g2_fifo_wait(); | ||
52 | CHNREG32(i, j) = 0; | ||
53 | } | ||
54 | g2_fifo_wait(); | ||
55 | CHNREG32(i,0) = 0x8000; | ||
56 | CHNREG32(i,20) = 0x1f; | ||
57 | } | ||
58 | |||
59 | SNDREG32(0x2800) = 0x000f; | ||
60 | g2_fifo_wait(); | ||
61 | G2_UNLOCK(old); | ||
62 | } | ||
63 | |||
64 | /* Translates a volume from linear form to logarithmic form (required by | ||
65 | the AICA chip */ | ||
66 | /* int logs[] = { | ||
67 | |||
68 | 0, 40, 50, 58, 63, 68, 73, 77, 80, 83, 86, 89, 92, 94, 97, 99, 101, 103, | ||
69 | 105, 107, 109, 111, 112, 114, 116, 117, 119, 120, 122, 123, 125, 126, 127, | ||
70 | 129, 130, 131, 133, 134, 135, 136, 137, 139, 140, 141, 142, 143, 144, 145, | ||
71 | 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159, | ||
72 | 160, 161, 162, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 170, 171, | ||
73 | 172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 180, 180, 181, 182, | ||
74 | 182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 188, 189, 190, 190, 191, | ||
75 | 191, 192, 193, 193, 194, 194, 195, 196, 196, 197, 197, 198, 198, 199, 199, | ||
76 | 200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 205, 206, 206, 207, 207, | ||
77 | 208, 208, 209, 209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215, | ||
78 | 215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222, | ||
79 | 222, 222, 223, 223, 224, 224, 225, 225, 225, 226, 226, 227, 227, 228, 228, | ||
80 | 228, 229, 229, 230, 230, 230, 231, 231, 232, 232, 232, 233, 233, 234, 234, | ||
81 | 234, 235, 235, 236, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240, | ||
82 | 240, 241, 241, 241, 242, 242, 243, 243, 243, 244, 244, 244, 245, 245, 245, | ||
83 | 246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 251, | ||
84 | 251, 251, 252, 252, 252, 253, 253, 253, 254, 254, 254, 255 | ||
85 | |||
86 | }; */ | ||
87 | |||
88 | const static unsigned char logs[] = { | ||
89 | 0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61, | ||
90 | 63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88, | ||
91 | 90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106, | ||
92 | 108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121, | ||
93 | 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, | ||
94 | 135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146, | ||
95 | 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156, | ||
96 | 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, | ||
97 | 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, | ||
98 | 177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185, | ||
99 | 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194, | ||
100 | 195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202, | ||
101 | 203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210, | ||
102 | 211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218, | ||
103 | 219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225, | ||
104 | 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, | ||
105 | 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240, | ||
106 | 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, | ||
107 | 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255 | ||
108 | }; | ||
109 | |||
110 | /* For the moment this is going to have to suffice, until we really | ||
111 | figure out what these mean. */ | ||
112 | #define AICA_PAN(x) ((x)==0x80?(0):((x)<0x80?(0x1f):(0x0f))) | ||
113 | #define AICA_VOL(x) (0xff - logs[128 + (((x) & 0xff) / 2)]) | ||
114 | //#define AICA_VOL(x) (0xff - logs[x&255]) | ||
115 | |||
116 | static inline unsigned AICA_FREQ(unsigned freq) { | ||
117 | unsigned long freq_lo, freq_base = 5644800; | ||
118 | int freq_hi = 7; | ||
119 | |||
120 | /* Need to convert frequency to floating point format | ||
121 | (freq_hi is exponent, freq_lo is mantissa) | ||
122 | Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */ | ||
123 | while (freq < freq_base && freq_hi > -8) { | ||
124 | freq_base >>= 1; | ||
125 | --freq_hi; | ||
126 | } | ||
127 | while (freq < freq_base && freq_hi > -8) { | ||
128 | freq_base >>= 1; | ||
129 | freq_hi--; | ||
130 | } | ||
131 | freq_lo = (freq<<10) / freq_base; | ||
132 | return (freq_hi << 11) | (freq_lo & 1023); | ||
133 | } | ||
134 | |||
135 | /* Sets up a sound channel completely. This is generally good if you want | ||
136 | a quick and dirty way to play notes. If you want a more comprehensive | ||
137 | set of routines (more like PC wavetable cards) see below. | ||
138 | |||
139 | ch is the channel to play on (0 - 63) | ||
140 | smpptr is the pointer to the sound data; if you're running off the | ||
141 | SH4, then this ought to be (ptr - 0xa0800000); otherwise it's just | ||
142 | ptr. Basically, it's an offset into sound ram. | ||
143 | mode is one of the mode constants (16 bit, 8 bit, ADPCM) | ||
144 | nsamp is the number of samples to play (not number of bytes!) | ||
145 | freq is the sampling rate of the sound | ||
146 | vol is the volume, 0 to 0xff (0xff is louder) | ||
147 | pan is a panning constant -- 0 is left, 128 is center, 255 is right. | ||
148 | |||
149 | This routine (and the similar ones) owe a lot to Marcus' sound example -- | ||
150 | I hadn't gotten quite this far into dissecting the individual regs yet. */ | ||
151 | void aica_play(int ch,int mode,unsigned long smpptr,int loopst,int loopend,int freq,int vol,int pan,int loopflag) { | ||
152 | /* int i; | ||
153 | */ | ||
154 | int val; | ||
155 | int old = 0; | ||
156 | |||
157 | /* Stop the channel (if it's already playing) */ | ||
158 | aica_stop(ch); | ||
159 | /* doesn't seem to be needed, but it's here just in case */ | ||
160 | /* | ||
161 | for (i=0; i<256; i++) { | ||
162 | asm("nop"); | ||
163 | asm("nop"); | ||
164 | asm("nop"); | ||
165 | asm("nop"); | ||
166 | } | ||
167 | */ | ||
168 | G2_LOCK(old); | ||
169 | /* Envelope setup. The first of these is the loop point, | ||
170 | e.g., where the sample starts over when it loops. The second | ||
171 | is the loop end. This is the full length of the sample when | ||
172 | you are not looping, or the loop end point when you are (though | ||
173 | storing more than that is a waste of memory if you're not doing | ||
174 | volume enveloping). */ | ||
175 | CHNREG32(ch, 8) = loopst & 0xffff; | ||
176 | CHNREG32(ch, 12) = loopend & 0xffff; | ||
177 | |||
178 | /* Write resulting values */ | ||
179 | CHNREG32(ch, 24) = AICA_FREQ(freq); | ||
180 | |||
181 | /* Set volume, pan, and some other things that we don't know what | ||
182 | they do =) */ | ||
183 | CHNREG32(ch, 36) = AICA_PAN(pan) | (0xf<<8); | ||
184 | /* Convert the incoming volume and pan into hardware values */ | ||
185 | /* Vol starts at zero so we can ramp */ | ||
186 | vol = AICA_VOL(vol); | ||
187 | CHNREG32(ch, 40) = 0x24 | (vol<<8); | ||
188 | /* Convert the incoming volume and pan into hardware values */ | ||
189 | /* Vol starts at zero so we can ramp */ | ||
190 | |||
191 | /* If we supported volume envelopes (which we don't yet) then | ||
192 | this value would set that up. The top 4 bits determine the | ||
193 | envelope speed. f is the fastest, 1 is the slowest, and 0 | ||
194 | seems to be an invalid value and does weird things). The | ||
195 | default (below) sets it into normal mode (play and terminate/loop). | ||
196 | CHNREG32(ch, 16) = 0xf010; | ||
197 | */ | ||
198 | CHNREG32(ch, 16) = 0x1f; /* No volume envelope */ | ||
199 | |||
200 | |||
201 | /* Set sample format, buffer address, and looping control. If | ||
202 | 0x0200 mask is set on reg 0, the sample loops infinitely. If | ||
203 | it's not set, the sample plays once and terminates. We'll | ||
204 | also set the bits to start playback here. */ | ||
205 | CHNREG32(ch, 4) = smpptr & 0xffff; | ||
206 | val = 0xc000 | 0x0000 | (mode<<7) | (smpptr >> 16); | ||
207 | if (loopflag) val|=0x200; | ||
208 | |||
209 | CHNREG32(ch, 0) = val; | ||
210 | |||
211 | G2_UNLOCK(old); | ||
212 | |||
213 | /* Enable playback */ | ||
214 | /* CHNREG32(ch, 0) |= 0xc000; */ | ||
215 | g2_fifo_wait(); | ||
216 | |||
217 | #if 0 | ||
218 | for (i=0xff; i>=vol; i--) { | ||
219 | if ((i&7)==0) g2_fifo_wait(); | ||
220 | CHNREG32(ch, 40) = 0x24 | (i<<8);; | ||
221 | } | ||
222 | |||
223 | g2_fifo_wait(); | ||
224 | #endif | ||
225 | } | ||
226 | |||
227 | /* Stop the sound on a given channel */ | ||
228 | void aica_stop(int ch) { | ||
229 | g2_write_32(CHNREGADDR(ch, 0),(g2_read_32(CHNREGADDR(ch, 0)) & ~0x4000) | 0x8000); | ||
230 | g2_fifo_wait(); | ||
231 | } | ||
232 | |||
233 | |||
234 | /* The rest of these routines can change the channel in mid-stride so you | ||
235 | can do things like vibrato and panning effects. */ | ||
236 | |||
237 | /* Set channel volume */ | ||
238 | void aica_vol(int ch,int vol) { | ||
239 | // g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol)); | ||
240 | g2_write_32(CHNREGADDR(ch, 40),(g2_read_32(CHNREGADDR(ch, 40))&0xffff00ff)|(AICA_VOL(vol)<<8) ); | ||
241 | g2_fifo_wait(); | ||
242 | } | ||
243 | |||
244 | /* Set channel pan */ | ||
245 | void aica_pan(int ch,int pan) { | ||
246 | // g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan)); | ||
247 | g2_write_32(CHNREGADDR(ch, 36),(g2_read_32(CHNREGADDR(ch, 36))&0xffffff00)|(AICA_PAN(pan)) ); | ||
248 | g2_fifo_wait(); | ||
249 | } | ||
250 | |||
251 | /* Set channel frequency */ | ||
252 | void aica_freq(int ch,int freq) { | ||
253 | g2_write_32(CHNREGADDR(ch, 24),AICA_FREQ(freq)); | ||
254 | g2_fifo_wait(); | ||
255 | } | ||
256 | |||
257 | /* Get channel position */ | ||
258 | int aica_get_pos(int ch) { | ||
259 | #if 1 | ||
260 | /* Observe channel ch */ | ||
261 | g2_write_32(SNDREGADDR(0x280c),(g2_read_32(SNDREGADDR(0x280c))&0xffff00ff) | (ch<<8)); | ||
262 | g2_fifo_wait(); | ||
263 | /* Update position counters */ | ||
264 | return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; | ||
265 | #else | ||
266 | /* Observe channel ch */ | ||
267 | g2_write_8(SNDREGADDR(0x280d),ch); | ||
268 | /* Update position counters */ | ||
269 | return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; | ||
270 | #endif | ||
271 | } | ||
diff --git a/apps/plugins/sdl/src/audio/dc/aica.h b/apps/plugins/sdl/src/audio/dc/aica.h new file mode 100644 index 0000000000..2721e42821 --- /dev/null +++ b/apps/plugins/sdl/src/audio/dc/aica.h | |||
@@ -0,0 +1,40 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | #ifndef _AICA_H_ | ||
25 | #define _AICA_H_ | ||
26 | |||
27 | #define AICA_MEM 0xa0800000 | ||
28 | |||
29 | #define SM_8BIT 1 | ||
30 | #define SM_16BIT 0 | ||
31 | #define SM_ADPCM 2 | ||
32 | |||
33 | void aica_play(int ch,int mode,unsigned long smpptr,int looptst,int loopend,int freq,int vol,int pan,int loopflag); | ||
34 | void aica_stop(int ch); | ||
35 | void aica_vol(int ch,int vol); | ||
36 | void aica_pan(int ch,int pan); | ||
37 | void aica_freq(int ch,int freq); | ||
38 | int aica_get_pos(int ch); | ||
39 | |||
40 | #endif | ||