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Diffstat (limited to 'apps/plugins/sdl/src/audio/mint/SDL_mintaudio_dma8.c')
-rw-r--r--apps/plugins/sdl/src/audio/mint/SDL_mintaudio_dma8.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/apps/plugins/sdl/src/audio/mint/SDL_mintaudio_dma8.c b/apps/plugins/sdl/src/audio/mint/SDL_mintaudio_dma8.c
deleted file mode 100644
index 61feba3d64..0000000000
--- a/apps/plugins/sdl/src/audio/mint/SDL_mintaudio_dma8.c
+++ /dev/null
@@ -1,357 +0,0 @@
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 Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21*/
22#include "SDL_config.h"
23
24/*
25 MiNT audio driver
26 using DMA 8bits (hardware access)
27
28 Patrice Mandin
29*/
30
31/* Mint includes */
32#include <mint/osbind.h>
33#include <mint/falcon.h>
34#include <mint/cookie.h>
35
36#include "SDL_audio.h"
37#include "../SDL_audio_c.h"
38#include "../SDL_sysaudio.h"
39
40#include "../../video/ataricommon/SDL_atarimxalloc_c.h"
41
42#include "SDL_mintaudio.h"
43#include "SDL_mintaudio_dma8.h"
44
45/*--- Defines ---*/
46
47#define MINT_AUDIO_DRIVER_NAME "mint_dma8"
48
49/* Debug print info */
50#define DEBUG_NAME "audio:dma8: "
51#if 0
52#define DEBUG_PRINT(what) \
53 { \
54 printf what; \
55 }
56#else
57#define DEBUG_PRINT(what)
58#endif
59
60/*--- Static variables ---*/
61
62static long cookie_snd, cookie_mch;
63
64/*--- Audio driver functions ---*/
65
66static void Mint_CloseAudio(_THIS);
67static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
68static void Mint_LockAudio(_THIS);
69static void Mint_UnlockAudio(_THIS);
70
71/* To check/init hardware audio */
72static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
73
74/* Functions called in supervisor mode */
75static void Mint_InitDma(void);
76static void Mint_StopReplay(void);
77static void Mint_StartReplay(void);
78
79/*--- Audio driver bootstrap functions ---*/
80
81static int Audio_Available(void)
82{
83 const char *envr = SDL_getenv("SDL_AUDIODRIVER");
84
85 /* Check if user asked a different audio driver */
86 if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
87 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
88 return 0;
89 }
90
91 /* Cookie _MCH present ? if not, assume ST machine */
92 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
93 cookie_mch = MCH_ST;
94 }
95
96 /* Cookie _SND present ? if not, assume ST machine */
97 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
98 cookie_snd = SND_PSG;
99 }
100
101 /* Check if we have 8 bits audio */
102 if ((cookie_snd & SND_8BIT)==0) {
103 DEBUG_PRINT((DEBUG_NAME "no 8 bits sound\n"));
104 return(0);
105 }
106
107 /* Check if audio is lockable */
108 if (cookie_snd & SND_16BIT) {
109 if (Locksnd()!=1) {
110 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
111 return(0);
112 }
113
114 Unlocksnd();
115 }
116
117 DEBUG_PRINT((DEBUG_NAME "8 bits audio available!\n"));
118 return(1);
119}
120
121static void Audio_DeleteDevice(SDL_AudioDevice *device)
122{
123 SDL_free(device->hidden);
124 SDL_free(device);
125}
126
127static SDL_AudioDevice *Audio_CreateDevice(int devindex)
128{
129 SDL_AudioDevice *this;
130
131 /* Initialize all variables that we clean on shutdown */
132 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
133 if ( this ) {
134 SDL_memset(this, 0, (sizeof *this));
135 this->hidden = (struct SDL_PrivateAudioData *)
136 SDL_malloc((sizeof *this->hidden));
137 }
138 if ( (this == NULL) || (this->hidden == NULL) ) {
139 SDL_OutOfMemory();
140 if ( this ) {
141 SDL_free(this);
142 }
143 return(0);
144 }
145 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
146
147 /* Set the function pointers */
148 this->OpenAudio = Mint_OpenAudio;
149 this->CloseAudio = Mint_CloseAudio;
150 this->LockAudio = Mint_LockAudio;
151 this->UnlockAudio = Mint_UnlockAudio;
152 this->free = Audio_DeleteDevice;
153
154 return this;
155}
156
157AudioBootStrap MINTAUDIO_DMA8_bootstrap = {
158 MINT_AUDIO_DRIVER_NAME, "MiNT DMA 8 bits audio driver",
159 Audio_Available, Audio_CreateDevice
160};
161
162static void Mint_LockAudio(_THIS)
163{
164 Supexec(Mint_StopReplay);
165}
166
167static void Mint_UnlockAudio(_THIS)
168{
169 Supexec(Mint_StartReplay);
170}
171
172static void Mint_CloseAudio(_THIS)
173{
174 Supexec(Mint_StopReplay);
175
176 DEBUG_PRINT((DEBUG_NAME "closeaudio: replay stopped\n"));
177
178 /* Disable interrupt */
179 Jdisint(MFP_DMASOUND);
180
181 DEBUG_PRINT((DEBUG_NAME "closeaudio: interrupt disabled\n"));
182
183 /* Wait if currently playing sound */
184 while (SDL_MintAudio_mutex != 0) {
185 }
186
187 DEBUG_PRINT((DEBUG_NAME "closeaudio: no more interrupt running\n"));
188
189 /* Clear buffers */
190 if (SDL_MintAudio_audiobuf[0]) {
191 Mfree(SDL_MintAudio_audiobuf[0]);
192 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
193 }
194
195 DEBUG_PRINT((DEBUG_NAME "closeaudio: buffers freed\n"));
196}
197
198static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
199{
200 int i, masterprediv, sfreq;
201 unsigned long masterclock;
202
203 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
204 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
205 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
206 DEBUG_PRINT(("channels=%d, ", spec->channels));
207 DEBUG_PRINT(("freq=%d\n", spec->freq));
208
209 if (spec->channels > 2)
210 spec->channels = 2;
211
212 /* Check formats available */
213 spec->format = AUDIO_S8;
214
215 /* Calculate and select the closest frequency */
216 sfreq=0;
217 masterclock=MASTERCLOCK_STE;
218 masterprediv=MASTERPREDIV_STE;
219 switch(cookie_mch>>16) {
220/*
221 case MCH_STE:
222 masterclock=MASTERCLOCK_STE;
223 masterprediv=MASTERPREDIV_STE;
224 break;
225*/
226 case MCH_TT:
227 masterclock=MASTERCLOCK_TT;
228 masterprediv=MASTERPREDIV_TT;
229 break;
230 case MCH_F30:
231 case MCH_ARANYM:
232 masterclock=MASTERCLOCK_FALCON1;
233 masterprediv=MASTERPREDIV_FALCON;
234 sfreq=1;
235 break;
236 }
237
238 MINTAUDIO_freqcount=0;
239 for (i=sfreq;i<4;i++) {
240 SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
241 masterclock, i-sfreq, -1);
242 }
243
244#if 1
245 for (i=0; i<MINTAUDIO_freqcount; i++) {
246 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
247 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
248 MINTAUDIO_frequencies[i].predivisor
249 ));
250 }
251#endif
252
253 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
254 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
255
256 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
257 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
258 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
259 DEBUG_PRINT(("channels=%d, ", spec->channels));
260 DEBUG_PRINT(("freq=%d\n", spec->freq));
261
262 return 0;
263}
264
265static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
266{
267 SDL_MintAudio_device = this;
268
269 /* Check audio capabilities */
270 if (Mint_CheckAudio(this, spec)==-1) {
271 return -1;
272 }
273
274 SDL_CalculateAudioSpec(spec);
275
276 /* Allocate memory for audio buffers in DMA-able RAM */
277 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
278
279 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
280 if (SDL_MintAudio_audiobuf[0]==NULL) {
281 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
282 return (-1);
283 }
284 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
285 SDL_MintAudio_numbuf=0;
286 SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
287 SDL_MintAudio_audiosize = spec->size;
288 SDL_MintAudio_mutex = 0;
289
290 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
291 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
292
293 SDL_MintAudio_CheckFpu();
294
295 /* Set replay tracks */
296 if (cookie_snd & SND_16BIT) {
297 Settracks(0,0);
298 Setmontracks(0);
299 }
300
301 Supexec(Mint_InitDma);
302
303 /* Set interrupt */
304 Jdisint(MFP_DMASOUND);
305 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
306 Jenabint(MFP_DMASOUND);
307
308 if (cookie_snd & SND_16BIT) {
309 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
310 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
311 }
312 }
313
314 Supexec(Mint_StartReplay);
315
316 return(1); /* We don't use threaded audio */
317}
318
319/* Functions called in supervisor mode */
320
321static void Mint_InitDma(void)
322{
323 unsigned long buffer;
324 unsigned char mode;
325 SDL_AudioDevice *this = SDL_MintAudio_device;
326
327 Mint_StopReplay();
328
329 /* Set buffer */
330 buffer = (unsigned long) SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
331 DMAAUDIO_IO.start_high = (buffer>>16) & 255;
332 DMAAUDIO_IO.start_mid = (buffer>>8) & 255;
333 DMAAUDIO_IO.start_low = buffer & 255;
334
335 buffer += SDL_MintAudio_audiosize;
336 DMAAUDIO_IO.end_high = (buffer>>16) & 255;
337 DMAAUDIO_IO.end_mid = (buffer>>8) & 255;
338 DMAAUDIO_IO.end_low = buffer & 255;
339
340 mode = 3-MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
341 if (this->spec.channels==1) {
342 mode |= 1<<7;
343 }
344 DMAAUDIO_IO.sound_ctrl = mode;
345}
346
347static void Mint_StopReplay(void)
348{
349 /* Stop replay */
350 DMAAUDIO_IO.control=0;
351}
352
353static void Mint_StartReplay(void)
354{
355 /* Start replay */
356 DMAAUDIO_IO.control=3;
357}
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