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 "vl.h"
  26
  27 #define AUDIO_CAP "mixeng"
  28 #include "audio_int.h"
  29
  30 #define NOVOL
  31
  32 /* 8 bit */
  33 #define ENDIAN_CONVERSION natural
  34 #define ENDIAN_CONVERT(v) (v)
  35
  36 /* Signed 8 bit */
  37 #define IN_T int8_t
  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 IN_T
  47 #undef SHIFT
  48
  49 /* Unsigned 8 bit */
  50 #define IN_T uint8_t
  51 #define IN_MIN 0
  52 #define IN_MAX UCHAR_MAX
  53 #define SHIFT 8
  54 #include "mixeng_template.h"
  55 #undef IN_MAX
  56 #undef IN_MIN
  57 #undef IN_T
  58 #undef SHIFT
  59
  60 #undef ENDIAN_CONVERT
  61 #undef ENDIAN_CONVERSION
  62
  63 /* Signed 16 bit */
  64 #define IN_T int16_t
  65 #define IN_MIN SHRT_MIN
  66 #define IN_MAX SHRT_MAX
  67 #define SIGNED
  68 #define SHIFT 16
  69 #define ENDIAN_CONVERSION natural
  70 #define ENDIAN_CONVERT(v) (v)
  71 #include "mixeng_template.h"
  72 #undef ENDIAN_CONVERT
  73 #undef ENDIAN_CONVERSION
  74 #define ENDIAN_CONVERSION swap
  75 #define ENDIAN_CONVERT(v) bswap16 (v)
  76 #include "mixeng_template.h"
  77 #undef ENDIAN_CONVERT
  78 #undef ENDIAN_CONVERSION
  79 #undef SIGNED
  80 #undef IN_MAX
  81 #undef IN_MIN
  82 #undef IN_T
  83 #undef SHIFT
  84
  85 /* Unsigned 16 bit */
  86 #define IN_T uint16_t
  87 #define IN_MIN 0
  88 #define IN_MAX USHRT_MAX
  89 #define SHIFT 16
  90 #define ENDIAN_CONVERSION natural
  91 #define ENDIAN_CONVERT(v) (v)
  92 #include "mixeng_template.h"
  93 #undef ENDIAN_CONVERT
  94 #undef ENDIAN_CONVERSION
  95 #define ENDIAN_CONVERSION swap
  96 #define ENDIAN_CONVERT(v) bswap16 (v)
  97 #include "mixeng_template.h"
  98 #undef ENDIAN_CONVERT
  99 #undef ENDIAN_CONVERSION
 100 #undef IN_MAX
 101 #undef IN_MIN
 102 #undef IN_T
 103 #undef SHIFT
 104
 105 /* Signed 32 bit */
 106 #define IN_T int32_t
 107 #define IN_MIN INT32_MIN
 108 #define IN_MAX INT32_MAX
 109 #define SIGNED
 110 #define SHIFT 32
 111 #define ENDIAN_CONVERSION natural
 112 #define ENDIAN_CONVERT(v) (v)
 113 #include "mixeng_template.h"
 114 #undef ENDIAN_CONVERT
 115 #undef ENDIAN_CONVERSION
 116 #define ENDIAN_CONVERSION swap
 117 #define ENDIAN_CONVERT(v) bswap32 (v)
 118 #include "mixeng_template.h"
 119 #undef ENDIAN_CONVERT
 120 #undef ENDIAN_CONVERSION
 121 #undef SIGNED
 122 #undef IN_MAX
 123 #undef IN_MIN
 124 #undef IN_T
 125 #undef SHIFT
 126
 127 /* Unsigned 16 bit */
 128 #define IN_T uint32_t
 129 #define IN_MIN 0
 130 #define IN_MAX UINT32_MAX
 131 #define SHIFT 32
 132 #define ENDIAN_CONVERSION natural
 133 #define ENDIAN_CONVERT(v) (v)
 134 #include "mixeng_template.h"
 135 #undef ENDIAN_CONVERT
 136 #undef ENDIAN_CONVERSION
 137 #define ENDIAN_CONVERSION swap
 138 #define ENDIAN_CONVERT(v) bswap32 (v)
 139 #include "mixeng_template.h"
 140 #undef ENDIAN_CONVERT
 141 #undef ENDIAN_CONVERSION
 142 #undef IN_MAX
 143 #undef IN_MIN
 144 #undef IN_T
 145 #undef SHIFT
 146
 147 t_sample *mixeng_conv[2][2][2][3] = {
 148     {
 149         {
 150             {
 151                 conv_natural_uint8_t_to_mono,
 152                 conv_natural_uint16_t_to_mono,
 153                 conv_natural_uint32_t_to_mono
 154             },
 155             {
 156                 conv_natural_uint8_t_to_mono,
 157                 conv_swap_uint16_t_to_mono,
 158                 conv_swap_uint32_t_to_mono,
 159             }
 160         },
 161         {
 162             {
 163                 conv_natural_int8_t_to_mono,
 164                 conv_natural_int16_t_to_mono,
 165                 conv_natural_int32_t_to_mono
 166             },
 167             {
 168                 conv_natural_int8_t_to_mono,
 169                 conv_swap_int16_t_to_mono,
 170                 conv_swap_int32_t_to_mono
 171             }
 172         }
 173     },
 174     {
 175         {
 176             {
 177                 conv_natural_uint8_t_to_stereo,
 178                 conv_natural_uint16_t_to_stereo,
 179                 conv_natural_uint32_t_to_stereo
 180             },
 181             {
 182                 conv_natural_uint8_t_to_stereo,
 183                 conv_swap_uint16_t_to_stereo,
 184                 conv_swap_uint32_t_to_stereo
 185             }
 186         },
 187         {
 188             {
 189                 conv_natural_int8_t_to_stereo,
 190                 conv_natural_int16_t_to_stereo,
 191                 conv_natural_int32_t_to_stereo
 192             },
 193             {
 194                 conv_natural_int8_t_to_stereo,
 195                 conv_swap_int16_t_to_stereo,
 196                 conv_swap_int32_t_to_stereo,
 197             }
 198         }
 199     }
 200 };
 201
 202 f_sample *mixeng_clip[2][2][2][3] = {
 203     {
 204         {
 205             {
 206                 clip_natural_uint8_t_from_mono,
 207                 clip_natural_uint16_t_from_mono,
 208                 clip_natural_uint32_t_from_mono
 209             },
 210             {
 211                 clip_natural_uint8_t_from_mono,
 212                 clip_swap_uint16_t_from_mono,
 213                 clip_swap_uint32_t_from_mono
 214             }
 215         },
 216         {
 217             {
 218                 clip_natural_int8_t_from_mono,
 219                 clip_natural_int16_t_from_mono,
 220                 clip_natural_int32_t_from_mono
 221             },
 222             {
 223                 clip_natural_int8_t_from_mono,
 224                 clip_swap_int16_t_from_mono,
 225                 clip_swap_int32_t_from_mono
 226             }
 227         }
 228     },
 229     {
 230         {
 231             {
 232                 clip_natural_uint8_t_from_stereo,
 233                 clip_natural_uint16_t_from_stereo,
 234                 clip_natural_uint32_t_from_stereo
 235             },
 236             {
 237                 clip_natural_uint8_t_from_stereo,
 238                 clip_swap_uint16_t_from_stereo,
 239                 clip_swap_uint32_t_from_stereo
 240             }
 241         },
 242         {
 243             {
 244                 clip_natural_int8_t_from_stereo,
 245                 clip_natural_int16_t_from_stereo,
 246                 clip_natural_int32_t_from_stereo
 247             },
 248             {
 249                 clip_natural_int8_t_from_stereo,
 250                 clip_swap_int16_t_from_stereo,
 251                 clip_swap_int32_t_from_stereo
 252             }
 253         }
 254     }
 255 };
 256
 257 /*
 258  * August 21, 1998
 259  * Copyright 1998 Fabrice Bellard.
 260  *
 261  * [Rewrote completly the code of Lance Norskog And Sundry
 262  * Contributors with a more efficient algorithm.]
 263  *
 264  * This source code is freely redistributable and may be used for
 265  * any purpose.  This copyright notice must be maintained.
 266  * Lance Norskog And Sundry Contributors are not responsible for
 267  * the consequences of using this software.
 268  */
 269
 270 /*
 271  * Sound Tools rate change effect file.
 272  */
 273 /*
 274  * Linear Interpolation.
 275  *
 276  * The use of fractional increment allows us to use no buffer. It
 277  * avoid the problems at the end of the buffer we had with the old
 278  * method which stored a possibly big buffer of size
 279  * lcm(in_rate,out_rate).
 280  *
 281  * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
 282  * the input & output frequencies are equal, a delay of one sample is
 283  * introduced.  Limited to processing 32-bit count worth of samples.
 284  *
 285  * 1 << FRAC_BITS evaluating to zero in several places.  Changed with
 286  * an (unsigned long) cast to make it safe.  MarkMLl 2/1/99
 287  */
 288
 289 /* Private data */
 290 struct rate {
 291     uint64_t opos;
 292     uint64_t opos_inc;
 293     uint32_t ipos;              /* position in the input stream (integer) */
 294     st_sample_t ilast;          /* last sample in the input stream */
 295 };
 296
 297 /*
 298  * Prepare processing.
 299  */
 300 void *st_rate_start (int inrate, int outrate)
 301 {
 302     struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate));
 303
 304     if (!rate) {
 305         dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
 306         return NULL;
 307     }
 308
 309     rate->opos = 0;
 310
 311     /* increment */
 312     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
 313
 314     rate->ipos = 0;
 315     rate->ilast.l = 0;
 316     rate->ilast.r = 0;
 317     return rate;
 318 }
 319
 320 #define NAME st_rate_flow_mix
 321 #define OP(a, b) a += b
 322 #include "rate_template.h"
 323
 324 #define NAME st_rate_flow
 325 #define OP(a, b) a = b
 326 #include "rate_template.h"
 327
 328 void st_rate_stop (void *opaque)
 329 {
 330     qemu_free (opaque);
 331 }
 332
 333 void mixeng_clear (st_sample_t *buf, int len)
 334 {
 335     memset (buf, 0, len * sizeof (st_sample_t));
 336 }