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comparison src/audio/SDL_mixer.c @ 633:873c2598f969

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Add m68k assembly mixing routines
author Patrice Mandin <patmandin@gmail.com>
date Tue, 03 Jun 2003 19:35:10 +0000
parents 64fe373be3dc
children 22dbf364c017
comparison
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632:85e104fe14c2 633:873c2598f969
35 #include "SDL_mutex.h" 35 #include "SDL_mutex.h"
36 #include "SDL_timer.h" 36 #include "SDL_timer.h"
37 #include "SDL_sysaudio.h" 37 #include "SDL_sysaudio.h"
38 #include "SDL_mixer_MMX.h" 38 #include "SDL_mixer_MMX.h"
39 #include "SDL_mixer_MMX_VC.h" 39 #include "SDL_mixer_MMX_VC.h"
40 #include "SDL_mixer_m68k.h"
40 41
41 /* Function to check the CPU flags */ 42 /* Function to check the CPU flags */
42 #define MMX_CPU 0x800000 43 #define MMX_CPU 0x800000
43 #ifdef USE_ASMBLIT 44 #ifdef USE_ASMBLIT
44 #define CPU_Flags() Hermes_X86_CPU() 45 #define CPU_Flags() Hermes_X86_CPU()
133 format = AUDIO_S16; 134 format = AUDIO_S16;
134 } 135 }
135 switch (format) { 136 switch (format) {
136 137
137 case AUDIO_U8: { 138 case AUDIO_U8: {
139 #if defined(__M68000__) && defined(__GNUC__)
140 SDL_MixAudio_m68k_U8((char*)dst,(char*)src,(unsigned long)len,(long)volume,(char *)mix8);
141 #else
138 Uint8 src_sample; 142 Uint8 src_sample;
139 143
140 while ( len-- ) { 144 while ( len-- ) {
141 src_sample = *src; 145 src_sample = *src;
142 ADJUST_VOLUME_U8(src_sample, volume); 146 ADJUST_VOLUME_U8(src_sample, volume);
143 *dst = mix8[*dst+src_sample]; 147 *dst = mix8[*dst+src_sample];
144 ++dst; 148 ++dst;
145 ++src; 149 ++src;
146 } 150 }
151 #endif
147 } 152 }
148 break; 153 break;
149 154
150 case AUDIO_S8: { 155 case AUDIO_S8: {
151 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) 156 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
160 { 165 {
161 SDL_MixAudio_MMX_S8_VC((char*)dst,(char*)src,(unsigned int)len,(int)volume); 166 SDL_MixAudio_MMX_S8_VC((char*)dst,(char*)src,(unsigned int)len,(int)volume);
162 } 167 }
163 else 168 else
164 #endif 169 #endif
170 #if defined(__M68000__) && defined(__GNUC__)
171 SDL_MixAudio_m68k_S8((char*)dst,(char*)src,(unsigned long)len,(long)volume);
172 #else
165 { 173 {
166 Sint8 *dst8, *src8; 174 Sint8 *dst8, *src8;
167 Sint8 src_sample; 175 Sint8 src_sample;
168 int dst_sample; 176 int dst_sample;
169 const int max_audioval = ((1<<(8-1))-1); 177 const int max_audioval = ((1<<(8-1))-1);
185 } 193 }
186 ++dst8; 194 ++dst8;
187 ++src8; 195 ++src8;
188 } 196 }
189 } 197 }
198 #endif
190 } 199 }
191 break; 200 break;
192 201
193 case AUDIO_S16LSB: { 202 case AUDIO_S16LSB: {
194 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) 203 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
202 { 211 {
203 SDL_MixAudio_MMX_S16_VC((char*)dst,(char*)src,(unsigned int)len,(int)volume); 212 SDL_MixAudio_MMX_S16_VC((char*)dst,(char*)src,(unsigned int)len,(int)volume);
204 } 213 }
205 else 214 else
206 #endif 215 #endif
216 #if defined(__M68000__) && defined(__GNUC__)
217 SDL_MixAudio_m68k_S16LSB((short*)dst,(short*)src,(unsigned long)len,(long)volume);
218 #else
207 { 219 {
208 Sint16 src1, src2; 220 Sint16 src1, src2;
209 int dst_sample; 221 int dst_sample;
210 const int max_audioval = ((1<<(16-1))-1); 222 const int max_audioval = ((1<<(16-1))-1);
211 const int min_audioval = -(1<<(16-1)); 223 const int min_audioval = -(1<<(16-1));
227 dst_sample >>= 8; 239 dst_sample >>= 8;
228 dst[1] = dst_sample&0xFF; 240 dst[1] = dst_sample&0xFF;
229 dst += 2; 241 dst += 2;
230 } 242 }
231 } 243 }
244 #endif
232 } 245 }
233 break; 246 break;
234 247
235 case AUDIO_S16MSB: { 248 case AUDIO_S16MSB: {
249 #if defined(__M68000__) && defined(__GNUC__)
250 SDL_MixAudio_m68k_S16MSB((short*)dst,(short*)src,(unsigned long)len,(long)volume);
251 #else
236 Sint16 src1, src2; 252 Sint16 src1, src2;
237 int dst_sample; 253 int dst_sample;
238 const int max_audioval = ((1<<(16-1))-1); 254 const int max_audioval = ((1<<(16-1))-1);
239 const int min_audioval = -(1<<(16-1)); 255 const int min_audioval = -(1<<(16-1));
240 256
254 dst[1] = dst_sample&0xFF; 270 dst[1] = dst_sample&0xFF;
255 dst_sample >>= 8; 271 dst_sample >>= 8;
256 dst[0] = dst_sample&0xFF; 272 dst[0] = dst_sample&0xFF;
257 dst += 2; 273 dst += 2;
258 } 274 }
275 #endif
259 } 276 }
260 break; 277 break;
261 278
262 default: /* If this happens... FIXME! */ 279 default: /* If this happens... FIXME! */
263 SDL_SetError("SDL_MixAudio(): unknown audio format"); 280 SDL_SetError("SDL_MixAudio(): unknown audio format");