1 /* 2 * QEMU Mixing engine 3 * 4 * Copyright (c) 2004-2005 Vassili Karpov (malc) 5 * Copyright (c) 1998 Fabrice Bellard 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 #include "qemu/osdep.h" 26 #include "qemu/bswap.h" 27 #include "qemu/error-report.h" 28 #include "audio.h" 29 30 #define AUDIO_CAP "mixeng" 31 #include "audio_int.h" 32 33 /* 8 bit */ 34 #define ENDIAN_CONVERSION natural 35 #define ENDIAN_CONVERT(v) (v) 36 37 /* Signed 8 bit */ 38 #define BSIZE 8 39 #define ITYPE int 40 #define IN_MIN SCHAR_MIN 41 #define IN_MAX SCHAR_MAX 42 #define SIGNED 43 #define SHIFT 8 44 #include "mixeng_template.h" 45 #undef SIGNED 46 #undef IN_MAX 47 #undef IN_MIN 48 #undef BSIZE 49 #undef ITYPE 50 #undef SHIFT 51 52 /* Unsigned 8 bit */ 53 #define BSIZE 8 54 #define ITYPE uint 55 #define IN_MIN 0 56 #define IN_MAX UCHAR_MAX 57 #define SHIFT 8 58 #include "mixeng_template.h" 59 #undef IN_MAX 60 #undef IN_MIN 61 #undef BSIZE 62 #undef ITYPE 63 #undef SHIFT 64 65 #undef ENDIAN_CONVERT 66 #undef ENDIAN_CONVERSION 67 68 /* Signed 16 bit */ 69 #define BSIZE 16 70 #define ITYPE int 71 #define IN_MIN SHRT_MIN 72 #define IN_MAX SHRT_MAX 73 #define SIGNED 74 #define SHIFT 16 75 #define ENDIAN_CONVERSION natural 76 #define ENDIAN_CONVERT(v) (v) 77 #include "mixeng_template.h" 78 #undef ENDIAN_CONVERT 79 #undef ENDIAN_CONVERSION 80 #define ENDIAN_CONVERSION swap 81 #define ENDIAN_CONVERT(v) bswap16 (v) 82 #include "mixeng_template.h" 83 #undef ENDIAN_CONVERT 84 #undef ENDIAN_CONVERSION 85 #undef SIGNED 86 #undef IN_MAX 87 #undef IN_MIN 88 #undef BSIZE 89 #undef ITYPE 90 #undef SHIFT 91 92 /* Unsigned 16 bit */ 93 #define BSIZE 16 94 #define ITYPE uint 95 #define IN_MIN 0 96 #define IN_MAX USHRT_MAX 97 #define SHIFT 16 98 #define ENDIAN_CONVERSION natural 99 #define ENDIAN_CONVERT(v) (v) 100 #include "mixeng_template.h" 101 #undef ENDIAN_CONVERT 102 #undef ENDIAN_CONVERSION 103 #define ENDIAN_CONVERSION swap 104 #define ENDIAN_CONVERT(v) bswap16 (v) 105 #include "mixeng_template.h" 106 #undef ENDIAN_CONVERT 107 #undef ENDIAN_CONVERSION 108 #undef IN_MAX 109 #undef IN_MIN 110 #undef BSIZE 111 #undef ITYPE 112 #undef SHIFT 113 114 /* Signed 32 bit */ 115 #define BSIZE 32 116 #define ITYPE int 117 #define IN_MIN INT32_MIN 118 #define IN_MAX INT32_MAX 119 #define SIGNED 120 #define SHIFT 32 121 #define ENDIAN_CONVERSION natural 122 #define ENDIAN_CONVERT(v) (v) 123 #include "mixeng_template.h" 124 #undef ENDIAN_CONVERT 125 #undef ENDIAN_CONVERSION 126 #define ENDIAN_CONVERSION swap 127 #define ENDIAN_CONVERT(v) bswap32 (v) 128 #include "mixeng_template.h" 129 #undef ENDIAN_CONVERT 130 #undef ENDIAN_CONVERSION 131 #undef SIGNED 132 #undef IN_MAX 133 #undef IN_MIN 134 #undef BSIZE 135 #undef ITYPE 136 #undef SHIFT 137 138 /* Unsigned 32 bit */ 139 #define BSIZE 32 140 #define ITYPE uint 141 #define IN_MIN 0 142 #define IN_MAX UINT32_MAX 143 #define SHIFT 32 144 #define ENDIAN_CONVERSION natural 145 #define ENDIAN_CONVERT(v) (v) 146 #include "mixeng_template.h" 147 #undef ENDIAN_CONVERT 148 #undef ENDIAN_CONVERSION 149 #define ENDIAN_CONVERSION swap 150 #define ENDIAN_CONVERT(v) bswap32 (v) 151 #include "mixeng_template.h" 152 #undef ENDIAN_CONVERT 153 #undef ENDIAN_CONVERSION 154 #undef IN_MAX 155 #undef IN_MIN 156 #undef BSIZE 157 #undef ITYPE 158 #undef SHIFT 159 160 t_sample *mixeng_conv[2][2][2][3] = { 161 { 162 { 163 { 164 conv_natural_uint8_t_to_mono, 165 conv_natural_uint16_t_to_mono, 166 conv_natural_uint32_t_to_mono 167 }, 168 { 169 conv_natural_uint8_t_to_mono, 170 conv_swap_uint16_t_to_mono, 171 conv_swap_uint32_t_to_mono, 172 } 173 }, 174 { 175 { 176 conv_natural_int8_t_to_mono, 177 conv_natural_int16_t_to_mono, 178 conv_natural_int32_t_to_mono 179 }, 180 { 181 conv_natural_int8_t_to_mono, 182 conv_swap_int16_t_to_mono, 183 conv_swap_int32_t_to_mono 184 } 185 } 186 }, 187 { 188 { 189 { 190 conv_natural_uint8_t_to_stereo, 191 conv_natural_uint16_t_to_stereo, 192 conv_natural_uint32_t_to_stereo 193 }, 194 { 195 conv_natural_uint8_t_to_stereo, 196 conv_swap_uint16_t_to_stereo, 197 conv_swap_uint32_t_to_stereo 198 } 199 }, 200 { 201 { 202 conv_natural_int8_t_to_stereo, 203 conv_natural_int16_t_to_stereo, 204 conv_natural_int32_t_to_stereo 205 }, 206 { 207 conv_natural_int8_t_to_stereo, 208 conv_swap_int16_t_to_stereo, 209 conv_swap_int32_t_to_stereo, 210 } 211 } 212 } 213 }; 214 215 f_sample *mixeng_clip[2][2][2][3] = { 216 { 217 { 218 { 219 clip_natural_uint8_t_from_mono, 220 clip_natural_uint16_t_from_mono, 221 clip_natural_uint32_t_from_mono 222 }, 223 { 224 clip_natural_uint8_t_from_mono, 225 clip_swap_uint16_t_from_mono, 226 clip_swap_uint32_t_from_mono 227 } 228 }, 229 { 230 { 231 clip_natural_int8_t_from_mono, 232 clip_natural_int16_t_from_mono, 233 clip_natural_int32_t_from_mono 234 }, 235 { 236 clip_natural_int8_t_from_mono, 237 clip_swap_int16_t_from_mono, 238 clip_swap_int32_t_from_mono 239 } 240 } 241 }, 242 { 243 { 244 { 245 clip_natural_uint8_t_from_stereo, 246 clip_natural_uint16_t_from_stereo, 247 clip_natural_uint32_t_from_stereo 248 }, 249 { 250 clip_natural_uint8_t_from_stereo, 251 clip_swap_uint16_t_from_stereo, 252 clip_swap_uint32_t_from_stereo 253 } 254 }, 255 { 256 { 257 clip_natural_int8_t_from_stereo, 258 clip_natural_int16_t_from_stereo, 259 clip_natural_int32_t_from_stereo 260 }, 261 { 262 clip_natural_int8_t_from_stereo, 263 clip_swap_int16_t_from_stereo, 264 clip_swap_int32_t_from_stereo 265 } 266 } 267 } 268 }; 269 270 void conv_natural_float_to_stereo(struct st_sample *dst, const void *src, 271 int samples) 272 { 273 float *in = (float *)src; 274 #ifndef FLOAT_MIXENG 275 const float scale = UINT_MAX; 276 #endif 277 278 while (samples--) { 279 #ifdef FLOAT_MIXENG 280 dst->l = *in++; 281 dst->r = *in++; 282 #else 283 dst->l = *in++ * scale; 284 dst->r = *in++ * scale; 285 #endif 286 dst++; 287 } 288 } 289 290 void clip_natural_float_from_stereo(void *dst, const struct st_sample *src, 291 int samples) 292 { 293 float *out = (float *)dst; 294 #ifndef FLOAT_MIXENG 295 #ifdef RECIPROCAL 296 const float scale = 1.f / UINT_MAX; 297 #else 298 const float scale = UINT_MAX; 299 #endif 300 #endif 301 302 while (samples--) { 303 #ifdef FLOAT_MIXENG 304 *out++ = src->l; 305 *out++ = src->r; 306 #else 307 #ifdef RECIPROCAL 308 *out++ = src->l * scale; 309 *out++ = src->r * scale; 310 #else 311 *out++ = src->l / scale; 312 *out++ = src->r / scale; 313 #endif 314 #endif 315 src++; 316 } 317 } 318 319 void audio_sample_to_uint64(void *samples, int pos, 320 uint64_t *left, uint64_t *right) 321 { 322 struct st_sample *sample = samples; 323 sample += pos; 324 #ifdef FLOAT_MIXENG 325 error_report( 326 "Coreaudio and floating point samples are not supported by replay yet"); 327 abort(); 328 #else 329 *left = sample->l; 330 *right = sample->r; 331 #endif 332 } 333 334 void audio_sample_from_uint64(void *samples, int pos, 335 uint64_t left, uint64_t right) 336 { 337 struct st_sample *sample = samples; 338 sample += pos; 339 #ifdef FLOAT_MIXENG 340 error_report( 341 "Coreaudio and floating point samples are not supported by replay yet"); 342 abort(); 343 #else 344 sample->l = left; 345 sample->r = right; 346 #endif 347 } 348 349 /* 350 * August 21, 1998 351 * Copyright 1998 Fabrice Bellard. 352 * 353 * [Rewrote completely the code of Lance Norskog And Sundry 354 * Contributors with a more efficient algorithm.] 355 * 356 * This source code is freely redistributable and may be used for 357 * any purpose. This copyright notice must be maintained. 358 * Lance Norskog And Sundry Contributors are not responsible for 359 * the consequences of using this software. 360 */ 361 362 /* 363 * Sound Tools rate change effect file. 364 */ 365 /* 366 * Linear Interpolation. 367 * 368 * The use of fractional increment allows us to use no buffer. It 369 * avoid the problems at the end of the buffer we had with the old 370 * method which stored a possibly big buffer of size 371 * lcm(in_rate,out_rate). 372 * 373 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If 374 * the input & output frequencies are equal, a delay of one sample is 375 * introduced. Limited to processing 32-bit count worth of samples. 376 * 377 * 1 << FRAC_BITS evaluating to zero in several places. Changed with 378 * an (unsigned long) cast to make it safe. MarkMLl 2/1/99 379 */ 380 381 /* Private data */ 382 struct rate { 383 uint64_t opos; 384 uint64_t opos_inc; 385 uint32_t ipos; /* position in the input stream (integer) */ 386 struct st_sample ilast; /* last sample in the input stream */ 387 }; 388 389 /* 390 * Prepare processing. 391 */ 392 void *st_rate_start (int inrate, int outrate) 393 { 394 struct rate *rate = audio_calloc(__func__, 1, sizeof(*rate)); 395 396 if (!rate) { 397 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate)); 398 return NULL; 399 } 400 401 rate->opos = 0; 402 403 /* increment */ 404 rate->opos_inc = ((uint64_t) inrate << 32) / outrate; 405 406 rate->ipos = 0; 407 rate->ilast.l = 0; 408 rate->ilast.r = 0; 409 return rate; 410 } 411 412 #define NAME st_rate_flow_mix 413 #define OP(a, b) a += b 414 #include "rate_template.h" 415 416 #define NAME st_rate_flow 417 #define OP(a, b) a = b 418 #include "rate_template.h" 419 420 void st_rate_stop (void *opaque) 421 { 422 g_free (opaque); 423 } 424 425 void mixeng_clear (struct st_sample *buf, int len) 426 { 427 memset (buf, 0, len * sizeof (struct st_sample)); 428 } 429 430 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol) 431 { 432 if (vol->mute) { 433 mixeng_clear (buf, len); 434 return; 435 } 436 437 while (len--) { 438 #ifdef FLOAT_MIXENG 439 buf->l = buf->l * vol->l; 440 buf->r = buf->r * vol->r; 441 #else 442 buf->l = (buf->l * vol->l) >> 32; 443 buf->r = (buf->r * vol->r) >> 32; 444 #endif 445 buf += 1; 446 } 447 } 448