LXR qemu/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
 161t_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
 216f_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
 272void 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
 287void 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 */
 335struct 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 */
 345void *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
 373void st_rate_stop (void *opaque)
 374{
 375    g_free (opaque);
 376}
 377
 378void mixeng_clear (struct st_sample *buf, int len)
 379{
 380    memset (buf, 0, len * sizeof (struct st_sample));
 381}
 382
 383void 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}
 401