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-common.h"
  27 #include "qemu/bswap.h"
  28 #include "qemu/error-report.h"
  29 #include "audio.h"
  30
  31 #define AUDIO_CAP "mixeng"
  32 #include "audio_int.h"
  33
  34 /* 8 bit */
  35 #define ENDIAN_CONVERSION natural
  36 #define ENDIAN_CONVERT(v) (v)
  37
  38 /* Signed 8 bit */
  39 #define BSIZE 8
  40 #define ITYPE int
  41 #define IN_MIN SCHAR_MIN
  42 #define IN_MAX SCHAR_MAX
  43 #define SIGNED
  44 #define SHIFT 8
  45 #include "mixeng_template.h"
  46 #undef SIGNED
  47 #undef IN_MAX
  48 #undef IN_MIN
  49 #undef BSIZE
  50 #undef ITYPE
  51 #undef SHIFT
  52
  53 /* Unsigned 8 bit */
  54 #define BSIZE 8
  55 #define ITYPE uint
  56 #define IN_MIN 0
  57 #define IN_MAX UCHAR_MAX
  58 #define SHIFT 8
  59 #include "mixeng_template.h"
  60 #undef IN_MAX
  61 #undef IN_MIN
  62 #undef BSIZE
  63 #undef ITYPE
  64 #undef SHIFT
  65
  66 #undef ENDIAN_CONVERT
  67 #undef ENDIAN_CONVERSION
  68
  69 /* Signed 16 bit */
  70 #define BSIZE 16
  71 #define ITYPE int
  72 #define IN_MIN SHRT_MIN
  73 #define IN_MAX SHRT_MAX
  74 #define SIGNED
  75 #define SHIFT 16
  76 #define ENDIAN_CONVERSION natural
  77 #define ENDIAN_CONVERT(v) (v)
  78 #include "mixeng_template.h"
  79 #undef ENDIAN_CONVERT
  80 #undef ENDIAN_CONVERSION
  81 #define ENDIAN_CONVERSION swap
  82 #define ENDIAN_CONVERT(v) bswap16 (v)
  83 #include "mixeng_template.h"
  84 #undef ENDIAN_CONVERT
  85 #undef ENDIAN_CONVERSION
  86 #undef SIGNED
  87 #undef IN_MAX
  88 #undef IN_MIN
  89 #undef BSIZE
  90 #undef ITYPE
  91 #undef SHIFT
  92
  93 /* Unsigned 16 bit */
  94 #define BSIZE 16
  95 #define ITYPE uint
  96 #define IN_MIN 0
  97 #define IN_MAX USHRT_MAX
  98 #define SHIFT 16
  99 #define ENDIAN_CONVERSION natural
 100 #define ENDIAN_CONVERT(v) (v)
 101 #include "mixeng_template.h"
 102 #undef ENDIAN_CONVERT
 103 #undef ENDIAN_CONVERSION
 104 #define ENDIAN_CONVERSION swap
 105 #define ENDIAN_CONVERT(v) bswap16 (v)
 106 #include "mixeng_template.h"
 107 #undef ENDIAN_CONVERT
 108 #undef ENDIAN_CONVERSION
 109 #undef IN_MAX
 110 #undef IN_MIN
 111 #undef BSIZE
 112 #undef ITYPE
 113 #undef SHIFT
 114
 115 /* Signed 32 bit */
 116 #define BSIZE 32
 117 #define ITYPE int
 118 #define IN_MIN INT32_MIN
 119 #define IN_MAX INT32_MAX
 120 #define SIGNED
 121 #define SHIFT 32
 122 #define ENDIAN_CONVERSION natural
 123 #define ENDIAN_CONVERT(v) (v)
 124 #include "mixeng_template.h"
 125 #undef ENDIAN_CONVERT
 126 #undef ENDIAN_CONVERSION
 127 #define ENDIAN_CONVERSION swap
 128 #define ENDIAN_CONVERT(v) bswap32 (v)
 129 #include "mixeng_template.h"
 130 #undef ENDIAN_CONVERT
 131 #undef ENDIAN_CONVERSION
 132 #undef SIGNED
 133 #undef IN_MAX
 134 #undef IN_MIN
 135 #undef BSIZE
 136 #undef ITYPE
 137 #undef SHIFT
 138
 139 /* Unsigned 32 bit */
 140 #define BSIZE 32
 141 #define ITYPE uint
 142 #define IN_MIN 0
 143 #define IN_MAX UINT32_MAX
 144 #define SHIFT 32
 145 #define ENDIAN_CONVERSION natural
 146 #define ENDIAN_CONVERT(v) (v)
 147 #include "mixeng_template.h"
 148 #undef ENDIAN_CONVERT
 149 #undef ENDIAN_CONVERSION
 150 #define ENDIAN_CONVERSION swap
 151 #define ENDIAN_CONVERT(v) bswap32 (v)
 152 #include "mixeng_template.h"
 153 #undef ENDIAN_CONVERT
 154 #undef ENDIAN_CONVERSION
 155 #undef IN_MAX
 156 #undef IN_MIN
 157 #undef BSIZE
 158 #undef ITYPE
 159 #undef SHIFT
 160
 161 t_sample *mixeng_conv[2][2][2][3] = {
 162     {
 163         {
 164             {
 165                 conv_natural_uint8_t_to_mono,
 166                 conv_natural_uint16_t_to_mono,
 167                 conv_natural_uint32_t_to_mono
 168             },
 169             {
 170                 conv_natural_uint8_t_to_mono,
 171                 conv_swap_uint16_t_to_mono,
 172                 conv_swap_uint32_t_to_mono,
 173             }
 174         },
 175         {
 176             {
 177                 conv_natural_int8_t_to_mono,
 178                 conv_natural_int16_t_to_mono,
 179                 conv_natural_int32_t_to_mono
 180             },
 181             {
 182                 conv_natural_int8_t_to_mono,
 183                 conv_swap_int16_t_to_mono,
 184                 conv_swap_int32_t_to_mono
 185             }
 186         }
 187     },
 188     {
 189         {
 190             {
 191                 conv_natural_uint8_t_to_stereo,
 192                 conv_natural_uint16_t_to_stereo,
 193                 conv_natural_uint32_t_to_stereo
 194             },
 195             {
 196                 conv_natural_uint8_t_to_stereo,
 197                 conv_swap_uint16_t_to_stereo,
 198                 conv_swap_uint32_t_to_stereo
 199             }
 200         },
 201         {
 202             {
 203                 conv_natural_int8_t_to_stereo,
 204                 conv_natural_int16_t_to_stereo,
 205                 conv_natural_int32_t_to_stereo
 206             },
 207             {
 208                 conv_natural_int8_t_to_stereo,
 209                 conv_swap_int16_t_to_stereo,
 210                 conv_swap_int32_t_to_stereo,
 211             }
 212         }
 213     }
 214 };
 215
 216 f_sample *mixeng_clip[2][2][2][3] = {
 217     {
 218         {
 219             {
 220                 clip_natural_uint8_t_from_mono,
 221                 clip_natural_uint16_t_from_mono,
 222                 clip_natural_uint32_t_from_mono
 223             },
 224             {
 225                 clip_natural_uint8_t_from_mono,
 226                 clip_swap_uint16_t_from_mono,
 227                 clip_swap_uint32_t_from_mono
 228             }
 229         },
 230         {
 231             {
 232                 clip_natural_int8_t_from_mono,
 233                 clip_natural_int16_t_from_mono,
 234                 clip_natural_int32_t_from_mono
 235             },
 236             {
 237                 clip_natural_int8_t_from_mono,
 238                 clip_swap_int16_t_from_mono,
 239                 clip_swap_int32_t_from_mono
 240             }
 241         }
 242     },
 243     {
 244         {
 245             {
 246                 clip_natural_uint8_t_from_stereo,
 247                 clip_natural_uint16_t_from_stereo,
 248                 clip_natural_uint32_t_from_stereo
 249             },
 250             {
 251                 clip_natural_uint8_t_from_stereo,
 252                 clip_swap_uint16_t_from_stereo,
 253                 clip_swap_uint32_t_from_stereo
 254             }
 255         },
 256         {
 257             {
 258                 clip_natural_int8_t_from_stereo,
 259                 clip_natural_int16_t_from_stereo,
 260                 clip_natural_int32_t_from_stereo
 261             },
 262             {
 263                 clip_natural_int8_t_from_stereo,
 264                 clip_swap_int16_t_from_stereo,
 265                 clip_swap_int32_t_from_stereo
 266             }
 267         }
 268     }
 269 };
 270
 271
 272 void audio_sample_to_uint64(void *samples, int pos,
 273                             uint64_t *left, uint64_t *right)
 274 {
 275     struct st_sample *sample = samples;
 276     sample += pos;
 277 #ifdef FLOAT_MIXENG
 278     error_report(
 279         "Coreaudio and floating point samples are not supported by replay yet");
 280     abort();
 281 #else
 282     *left = sample->l;
 283     *right = sample->r;
 284 #endif
 285 }
 286
 287 void audio_sample_from_uint64(void *samples, int pos,
 288                             uint64_t left, uint64_t right)
 289 {
 290     struct st_sample *sample = samples;
 291     sample += pos;
 292 #ifdef FLOAT_MIXENG
 293     error_report(
 294         "Coreaudio and floating point samples are not supported by replay yet");
 295     abort();
 296 #else
 297     sample->l = left;
 298     sample->r = right;
 299 #endif
 300 }
 301
 302 /*
 303  * August 21, 1998
 304  * Copyright 1998 Fabrice Bellard.
 305  *
 306  * [Rewrote completely the code of Lance Norskog And Sundry
 307  * Contributors with a more efficient algorithm.]
 308  *
 309  * This source code is freely redistributable and may be used for
 310  * any purpose.  This copyright notice must be maintained.
 311  * Lance Norskog And Sundry Contributors are not responsible for
 312  * the consequences of using this software.
 313  */
 314
 315 /*
 316  * Sound Tools rate change effect file.
 317  */
 318 /*
 319  * Linear Interpolation.
 320  *
 321  * The use of fractional increment allows us to use no buffer. It
 322  * avoid the problems at the end of the buffer we had with the old
 323  * method which stored a possibly big buffer of size
 324  * lcm(in_rate,out_rate).
 325  *
 326  * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 327  * the input & output frequencies are equal, a delay of one sample is
 328  * introduced.  Limited to processing 32-bit count worth of samples.
 329  *
 330  * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 331  * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 332  */
 333
 334 /* Private data */
 335 struct rate {
 336     uint64_t opos;
 337     uint64_t opos_inc;
 338     uint32_t ipos;              /* position in the input stream (integer) */
 339     struct st_sample ilast;          /* last sample in the input stream */
 340 };
 341
 342 /*
 343  * Prepare processing.
 344  */
 345 void *st_rate_start (int inrate, int outrate)
 346 {
 347     struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
 348
 349     if (!rate) {
 350         dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
 351         return NULL;
 352     }
 353
 354     rate->opos = 0;
 355
 356     /* increment */
 357     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
 358
 359     rate->ipos = 0;
 360     rate->ilast.l = 0;
 361     rate->ilast.r = 0;
 362     return rate;
 363 }
 364
 365 #define NAME st_rate_flow_mix
 366 #define OP(a, b) a += b
 367 #include "rate_template.h"
 368
 369 #define NAME st_rate_flow
 370 #define OP(a, b) a = b
 371 #include "rate_template.h"
 372
 373 void st_rate_stop (void *opaque)
 374 {
 375     g_free (opaque);
 376 }
 377
 378 void mixeng_clear (struct st_sample *buf, int len)
 379 {
 380     memset (buf, 0, len * sizeof (struct st_sample));
 381 }
 382
 383 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
 384 {
 385     if (vol->mute) {
 386         mixeng_clear (buf, len);
 387         return;
 388     }
 389
 390     while (len--) {
 391 #ifdef FLOAT_MIXENG
 392         buf->l = buf->l * vol->l;
 393         buf->r = buf->r * vol->r;
 394 #else
 395         buf->l = (buf->l * vol->l) >> 32;
 396         buf->r = (buf->r * vol->r) >> 32;
 397 #endif
 398         buf += 1;
 399     }
 400 }