audio/mixeng.c

   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 #ifdef FLOAT_MIXENG
 271 #define FLOAT_CONV_TO(x) (x)
 272 #define FLOAT_CONV_FROM(x) (x)
 273 #else
 274 static const float float_scale = UINT_MAX;
 275 #define FLOAT_CONV_TO(x) ((x) * float_scale)
 276
 277 #ifdef RECIPROCAL
 278 static const float float_scale_reciprocal = 1.f / UINT_MAX;
 279 #define FLOAT_CONV_FROM(x) ((x) * float_scale_reciprocal)
 280 #else
 281 #define FLOAT_CONV_FROM(x) ((x) / float_scale)
 282 #endif
 283 #endif
 284
 285 static void conv_natural_float_to_mono(struct st_sample *dst, const void *src,
 286                                        int samples)
 287 {
 288     float *in = (float *)src;
 289
 290     while (samples--) {
 291         dst->r = dst->l = FLOAT_CONV_TO(*in++);
 292         dst++;
 293     }
 294 }
 295
 296 static void conv_natural_float_to_stereo(struct st_sample *dst, const void *src,
 297                                          int samples)
 298 {
 299     float *in = (float *)src;
 300
 301     while (samples--) {
 302         dst->l = FLOAT_CONV_TO(*in++);
 303         dst->r = FLOAT_CONV_TO(*in++);
 304         dst++;
 305     }
 306 }
 307
 308 t_sample *mixeng_conv_float[2] = {
 309     conv_natural_float_to_mono,
 310     conv_natural_float_to_stereo,
 311 };
 312
 313 static void clip_natural_float_from_mono(void *dst, const struct st_sample *src,
 314                                          int samples)
 315 {
 316     float *out = (float *)dst;
 317
 318     while (samples--) {
 319         *out++ = FLOAT_CONV_FROM(src->l) + FLOAT_CONV_FROM(src->r);
 320         src++;
 321     }
 322 }
 323
 324 static void clip_natural_float_from_stereo(
 325     void *dst, const struct st_sample *src, int samples)
 326 {
 327     float *out = (float *)dst;
 328
 329     while (samples--) {
 330         *out++ = FLOAT_CONV_FROM(src->l);
 331         *out++ = FLOAT_CONV_FROM(src->r);
 332         src++;
 333     }
 334 }
 335
 336 f_sample *mixeng_clip_float[2] = {
 337     clip_natural_float_from_mono,
 338     clip_natural_float_from_stereo,
 339 };
 340
 341 void audio_sample_to_uint64(void *samples, int pos,
 342                             uint64_t *left, uint64_t *right)
 343 {
 344     struct st_sample *sample = samples;
 345     sample += pos;
 346 #ifdef FLOAT_MIXENG
 347     error_report(
 348         "Coreaudio and floating point samples are not supported by replay yet");
 349     abort();
 350 #else
 351     *left = sample->l;
 352     *right = sample->r;
 353 #endif
 354 }
 355
 356 void audio_sample_from_uint64(void *samples, int pos,
 357                             uint64_t left, uint64_t right)
 358 {
 359     struct st_sample *sample = samples;
 360     sample += pos;
 361 #ifdef FLOAT_MIXENG
 362     error_report(
 363         "Coreaudio and floating point samples are not supported by replay yet");
 364     abort();
 365 #else
 366     sample->l = left;
 367     sample->r = right;
 368 #endif
 369 }
 370
 371 /*
 372  * August 21, 1998
 373  * Copyright 1998 Fabrice Bellard.
 374  *
 375  * [Rewrote completely the code of Lance Norskog And Sundry
 376  * Contributors with a more efficient algorithm.]
 377  *
 378  * This source code is freely redistributable and may be used for
 379  * any purpose.  This copyright notice must be maintained.
 380  * Lance Norskog And Sundry Contributors are not responsible for
 381  * the consequences of using this software.
 382  */
 383
 384 /*
 385  * Sound Tools rate change effect file.
 386  */
 387 /*
 388  * Linear Interpolation.
 389  *
 390  * The use of fractional increment allows us to use no buffer. It
 391  * avoid the problems at the end of the buffer we had with the old
 392  * method which stored a possibly big buffer of size
 393  * lcm(in_rate,out_rate).
 394  *
 395  * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 396  * the input & output frequencies are equal, a delay of one sample is
 397  * introduced.  Limited to processing 32-bit count worth of samples.
 398  *
 399  * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 400  * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 401  */
 402
 403 /* Private data */
 404 struct rate {
 405     uint64_t opos;
 406     uint64_t opos_inc;
 407     uint32_t ipos;              /* position in the input stream (integer) */
 408     struct st_sample ilast;          /* last sample in the input stream */
 409 };
 410
 411 /*
 412  * Prepare processing.
 413  */
 414 void *st_rate_start (int inrate, int outrate)
 415 {
 416     struct rate *rate = audio_calloc(__func__, 1, sizeof(*rate));
 417
 418     if (!rate) {
 419         dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
 420         return NULL;
 421     }
 422
 423     rate->opos = 0;
 424
 425     /* increment */
 426     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
 427
 428     rate->ipos = 0;
 429     rate->ilast.l = 0;
 430     rate->ilast.r = 0;
 431     return rate;
 432 }
 433
 434 #define NAME st_rate_flow_mix
 435 #define OP(a, b) a += b
 436 #include "rate_template.h"
 437
 438 #define NAME st_rate_flow
 439 #define OP(a, b) a = b
 440 #include "rate_template.h"
 441
 442 void st_rate_stop (void *opaque)
 443 {
 444     g_free (opaque);
 445 }
 446
 447 void mixeng_clear (struct st_sample *buf, int len)
 448 {
 449     memset (buf, 0, len * sizeof (struct st_sample));
 450 }
 451
 452 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
 453 {
 454     if (vol->mute) {
 455         mixeng_clear (buf, len);
 456         return;
 457     }
 458
 459     while (len--) {
 460 #ifdef FLOAT_MIXENG
 461         buf->l = buf->l * vol->l;
 462         buf->r = buf->r * vol->r;
 463 #else
 464         buf->l = (buf->l * vol->l) >> 32;
 465         buf->r = (buf->r * vol->r) >> 32;
 466 #endif
 467         buf += 1;
 468     }
 469 }