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 "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 /*
 271  * August 21, 1998
 272  * Copyright 1998 Fabrice Bellard.
 273  *
 274  * [Rewrote completely the code of Lance Norskog And Sundry
 275  * Contributors with a more efficient algorithm.]
 276  *
 277  * This source code is freely redistributable and may be used for
 278  * any purpose.  This copyright notice must be maintained.
 279  * Lance Norskog And Sundry Contributors are not responsible for
 280  * the consequences of using this software.
 281  */
 282
 283 /*
 284  * Sound Tools rate change effect file.
 285  */
 286 /*
 287  * Linear Interpolation.
 288  *
 289  * The use of fractional increment allows us to use no buffer. It
 290  * avoid the problems at the end of the buffer we had with the old
 291  * method which stored a possibly big buffer of size
 292  * lcm(in_rate,out_rate).
 293  *
 294  * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 295  * the input & output frequencies are equal, a delay of one sample is
 296  * introduced.  Limited to processing 32-bit count worth of samples.
 297  *
 298  * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 299  * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 300  */
 301
 302 /* Private data */
 303 struct rate {
 304     uint64_t opos;
 305     uint64_t opos_inc;
 306     uint32_t ipos;              /* position in the input stream (integer) */
 307     struct st_sample ilast;          /* last sample in the input stream */
 308 };
 309
 310 /*
 311  * Prepare processing.
 312  */
 313 void *st_rate_start (int inrate, int outrate)
 314 {
 315     struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
 316
 317     if (!rate) {
 318         dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
 319         return NULL;
 320     }
 321
 322     rate->opos = 0;
 323
 324     /* increment */
 325     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
 326
 327     rate->ipos = 0;
 328     rate->ilast.l = 0;
 329     rate->ilast.r = 0;
 330     return rate;
 331 }
 332
 333 #define NAME st_rate_flow_mix
 334 #define OP(a, b) a += b
 335 #include "rate_template.h"
 336
 337 #define NAME st_rate_flow
 338 #define OP(a, b) a = b
 339 #include "rate_template.h"
 340
 341 void st_rate_stop (void *opaque)
 342 {
 343     g_free (opaque);
 344 }
 345
 346 void mixeng_clear (struct st_sample *buf, int len)
 347 {
 348     memset (buf, 0, len * sizeof (struct st_sample));
 349 }
 350
 351 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
 352 {
 353     if (vol->mute) {
 354         mixeng_clear (buf, len);
 355         return;
 356     }
 357
 358     while (len--) {
 359 #ifdef FLOAT_MIXENG
 360         buf->l = buf->l * vol->l;
 361         buf->r = buf->r * vol->r;
 362 #else
 363         buf->l = (buf->l * vol->l) >> 32;
 364         buf->r = (buf->r * vol->r) >> 32;
 365 #endif
 366         buf += 1;
 367     }
 368 }