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