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 #define NOVOL
  32
  33 /* 8 bit */
  34 #define ENDIAN_CONVERSION natural
  35 #define ENDIAN_CONVERT(v) (v)
  36
  37 /* Signed 8 bit */
  38 #define IN_T int8_t
  39 #define IN_MIN SCHAR_MIN
  40 #define IN_MAX SCHAR_MAX
  41 #define SIGNED
  42 #define SHIFT 8
  43 #include "mixeng_template.h"
  44 #undef SIGNED
  45 #undef IN_MAX
  46 #undef IN_MIN
  47 #undef IN_T
  48 #undef SHIFT
  49
  50 /* Unsigned 8 bit */
  51 #define IN_T uint8_t
  52 #define IN_MIN 0
  53 #define IN_MAX UCHAR_MAX
  54 #define SHIFT 8
  55 #include "mixeng_template.h"
  56 #undef IN_MAX
  57 #undef IN_MIN
  58 #undef IN_T
  59 #undef SHIFT
  60
  61 #undef ENDIAN_CONVERT
  62 #undef ENDIAN_CONVERSION
  63
  64 /* Signed 16 bit */
  65 #define IN_T int16_t
  66 #define IN_MIN SHRT_MIN
  67 #define IN_MAX SHRT_MAX
  68 #define SIGNED
  69 #define SHIFT 16
  70 #define ENDIAN_CONVERSION natural
  71 #define ENDIAN_CONVERT(v) (v)
  72 #include "mixeng_template.h"
  73 #undef ENDIAN_CONVERT
  74 #undef ENDIAN_CONVERSION
  75 #define ENDIAN_CONVERSION swap
  76 #define ENDIAN_CONVERT(v) bswap16 (v)
  77 #include "mixeng_template.h"
  78 #undef ENDIAN_CONVERT
  79 #undef ENDIAN_CONVERSION
  80 #undef SIGNED
  81 #undef IN_MAX
  82 #undef IN_MIN
  83 #undef IN_T
  84 #undef SHIFT
  85
  86 /* Unsigned 16 bit */
  87 #define IN_T uint16_t
  88 #define IN_MIN 0
  89 #define IN_MAX USHRT_MAX
  90 #define SHIFT 16
  91 #define ENDIAN_CONVERSION natural
  92 #define ENDIAN_CONVERT(v) (v)
  93 #include "mixeng_template.h"
  94 #undef ENDIAN_CONVERT
  95 #undef ENDIAN_CONVERSION
  96 #define ENDIAN_CONVERSION swap
  97 #define ENDIAN_CONVERT(v) bswap16 (v)
  98 #include "mixeng_template.h"
  99 #undef ENDIAN_CONVERT
 100 #undef ENDIAN_CONVERSION
 101 #undef IN_MAX
 102 #undef IN_MIN
 103 #undef IN_T
 104 #undef SHIFT
 105
 106 /* Signed 32 bit */
 107 #define IN_T int32_t
 108 #define IN_MIN INT32_MIN
 109 #define IN_MAX INT32_MAX
 110 #define SIGNED
 111 #define SHIFT 32
 112 #define ENDIAN_CONVERSION natural
 113 #define ENDIAN_CONVERT(v) (v)
 114 #include "mixeng_template.h"
 115 #undef ENDIAN_CONVERT
 116 #undef ENDIAN_CONVERSION
 117 #define ENDIAN_CONVERSION swap
 118 #define ENDIAN_CONVERT(v) bswap32 (v)
 119 #include "mixeng_template.h"
 120 #undef ENDIAN_CONVERT
 121 #undef ENDIAN_CONVERSION
 122 #undef SIGNED
 123 #undef IN_MAX
 124 #undef IN_MIN
 125 #undef IN_T
 126 #undef SHIFT
 127
 128 /* Unsigned 16 bit */
 129 #define IN_T uint32_t
 130 #define IN_MIN 0
 131 #define IN_MAX UINT32_MAX
 132 #define SHIFT 32
 133 #define ENDIAN_CONVERSION natural
 134 #define ENDIAN_CONVERT(v) (v)
 135 #include "mixeng_template.h"
 136 #undef ENDIAN_CONVERT
 137 #undef ENDIAN_CONVERSION
 138 #define ENDIAN_CONVERSION swap
 139 #define ENDIAN_CONVERT(v) bswap32 (v)
 140 #include "mixeng_template.h"
 141 #undef ENDIAN_CONVERT
 142 #undef ENDIAN_CONVERSION
 143 #undef IN_MAX
 144 #undef IN_MIN
 145 #undef IN_T
 146 #undef SHIFT
 147
 148 t_sample *mixeng_conv[2][2][2][3] = {
 149     {
 150         {
 151             {
 152                 conv_natural_uint8_t_to_mono,
 153                 conv_natural_uint16_t_to_mono,
 154                 conv_natural_uint32_t_to_mono
 155             },
 156             {
 157                 conv_natural_uint8_t_to_mono,
 158                 conv_swap_uint16_t_to_mono,
 159                 conv_swap_uint32_t_to_mono,
 160             }
 161         },
 162         {
 163             {
 164                 conv_natural_int8_t_to_mono,
 165                 conv_natural_int16_t_to_mono,
 166                 conv_natural_int32_t_to_mono
 167             },
 168             {
 169                 conv_natural_int8_t_to_mono,
 170                 conv_swap_int16_t_to_mono,
 171                 conv_swap_int32_t_to_mono
 172             }
 173         }
 174     },
 175     {
 176         {
 177             {
 178                 conv_natural_uint8_t_to_stereo,
 179                 conv_natural_uint16_t_to_stereo,
 180                 conv_natural_uint32_t_to_stereo
 181             },
 182             {
 183                 conv_natural_uint8_t_to_stereo,
 184                 conv_swap_uint16_t_to_stereo,
 185                 conv_swap_uint32_t_to_stereo
 186             }
 187         },
 188         {
 189             {
 190                 conv_natural_int8_t_to_stereo,
 191                 conv_natural_int16_t_to_stereo,
 192                 conv_natural_int32_t_to_stereo
 193             },
 194             {
 195                 conv_natural_int8_t_to_stereo,
 196                 conv_swap_int16_t_to_stereo,
 197                 conv_swap_int32_t_to_stereo,
 198             }
 199         }
 200     }
 201 };
 202
 203 f_sample *mixeng_clip[2][2][2][3] = {
 204     {
 205         {
 206             {
 207                 clip_natural_uint8_t_from_mono,
 208                 clip_natural_uint16_t_from_mono,
 209                 clip_natural_uint32_t_from_mono
 210             },
 211             {
 212                 clip_natural_uint8_t_from_mono,
 213                 clip_swap_uint16_t_from_mono,
 214                 clip_swap_uint32_t_from_mono
 215             }
 216         },
 217         {
 218             {
 219                 clip_natural_int8_t_from_mono,
 220                 clip_natural_int16_t_from_mono,
 221                 clip_natural_int32_t_from_mono
 222             },
 223             {
 224                 clip_natural_int8_t_from_mono,
 225                 clip_swap_int16_t_from_mono,
 226                 clip_swap_int32_t_from_mono
 227             }
 228         }
 229     },
 230     {
 231         {
 232             {
 233                 clip_natural_uint8_t_from_stereo,
 234                 clip_natural_uint16_t_from_stereo,
 235                 clip_natural_uint32_t_from_stereo
 236             },
 237             {
 238                 clip_natural_uint8_t_from_stereo,
 239                 clip_swap_uint16_t_from_stereo,
 240                 clip_swap_uint32_t_from_stereo
 241             }
 242         },
 243         {
 244             {
 245                 clip_natural_int8_t_from_stereo,
 246                 clip_natural_int16_t_from_stereo,
 247                 clip_natural_int32_t_from_stereo
 248             },
 249             {
 250                 clip_natural_int8_t_from_stereo,
 251                 clip_swap_int16_t_from_stereo,
 252                 clip_swap_int32_t_from_stereo
 253             }
 254         }
 255     }
 256 };
 257
 258 /*
 259  * August 21, 1998
 260  * Copyright 1998 Fabrice Bellard.
 261  *
 262  * [Rewrote completly the code of Lance Norskog And Sundry
 263  * Contributors with a more efficient algorithm.]
 264  *
 265  * This source code is freely redistributable and may be used for
 266  * any purpose.  This copyright notice must be maintained.
 267  * Lance Norskog And Sundry Contributors are not responsible for
 268  * the consequences of using this software.
 269  */
 270
 271 /*
 272  * Sound Tools rate change effect file.
 273  */
 274 /*
 275  * Linear Interpolation.
 276  *
 277  * The use of fractional increment allows us to use no buffer. It
 278  * avoid the problems at the end of the buffer we had with the old
 279  * method which stored a possibly big buffer of size
 280  * lcm(in_rate,out_rate).
 281  *
 282  * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 283  * the input & output frequencies are equal, a delay of one sample is
 284  * introduced.  Limited to processing 32-bit count worth of samples.
 285  *
 286  * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 287  * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 288  */
 289
 290 /* Private data */
 291 struct rate {
 292     uint64_t opos;
 293     uint64_t opos_inc;
 294     uint32_t ipos;              /* position in the input stream (integer) */
 295     st_sample_t ilast;          /* last sample in the input stream */
 296 };
 297
 298 /*
 299  * Prepare processing.
 300  */
 301 void *st_rate_start (int inrate, int outrate)
 302 {
 303     struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
 304
 305     if (!rate) {
 306         dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
 307         return NULL;
 308     }
 309
 310     rate->opos = 0;
 311
 312     /* increment */
 313     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
 314
 315     rate->ipos = 0;
 316     rate->ilast.l = 0;
 317     rate->ilast.r = 0;
 318     return rate;
 319 }
 320
 321 #define NAME st_rate_flow_mix
 322 #define OP(a, b) a += b
 323 #include "rate_template.h"
 324
 325 #define NAME st_rate_flow
 326 #define OP(a, b) a = b
 327 #include "rate_template.h"
 328
 329 void st_rate_stop (void *opaque)
 330 {
 331     qemu_free (opaque);
 332 }
 333
 334 void mixeng_clear (st_sample_t *buf, int len)
 335 {
 336     memset (buf, 0, len * sizeof (st_sample_t));
 337 }