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bellard85571bc2004-11-07 18:04:02 +00001/*
2 * QEMU Mixing engine
3 *
bellard1d14ffa2005-10-30 18:58:22 +00004 * Copyright (c) 2004-2005 Vassili Karpov (malc)
bellard85571bc2004-11-07 18:04:02 +00005 * 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 */
Peter Maydell6086a562016-01-18 17:33:52 +000025#include "qemu/osdep.h"
Paolo Bonzini58369e22016-03-15 17:22:36 +010026#include "qemu/bswap.h"
Pavel Dovgalyuk3d4d16f2017-02-02 08:50:54 +030027#include "qemu/error-report.h"
pbrook87ecb682007-11-17 17:14:51 +000028#include "audio.h"
bellard85571bc2004-11-07 18:04:02 +000029
bellard1d14ffa2005-10-30 18:58:22 +000030#define AUDIO_CAP "mixeng"
31#include "audio_int.h"
32
bellard1d14ffa2005-10-30 18:58:22 +000033/* 8 bit */
34#define ENDIAN_CONVERSION natural
35#define ENDIAN_CONVERT(v) (v)
36
37/* Signed 8 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +010038#define BSIZE 8
39#define ITYPE int
bellard1d14ffa2005-10-30 18:58:22 +000040#define IN_MIN SCHAR_MIN
41#define IN_MAX SCHAR_MAX
bellard85571bc2004-11-07 18:04:02 +000042#define SIGNED
bellard1d14ffa2005-10-30 18:58:22 +000043#define SHIFT 8
bellard85571bc2004-11-07 18:04:02 +000044#include "mixeng_template.h"
45#undef SIGNED
46#undef IN_MAX
47#undef IN_MIN
Roger Pau Monnea2885382012-05-18 12:08:14 +010048#undef BSIZE
49#undef ITYPE
bellard1d14ffa2005-10-30 18:58:22 +000050#undef SHIFT
bellard85571bc2004-11-07 18:04:02 +000051
bellard1d14ffa2005-10-30 18:58:22 +000052/* Unsigned 8 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +010053#define BSIZE 8
54#define ITYPE uint
bellard85571bc2004-11-07 18:04:02 +000055#define IN_MIN 0
56#define IN_MAX UCHAR_MAX
bellard1d14ffa2005-10-30 18:58:22 +000057#define SHIFT 8
bellard85571bc2004-11-07 18:04:02 +000058#include "mixeng_template.h"
59#undef IN_MAX
60#undef IN_MIN
Roger Pau Monnea2885382012-05-18 12:08:14 +010061#undef BSIZE
62#undef ITYPE
bellard1d14ffa2005-10-30 18:58:22 +000063#undef SHIFT
bellard85571bc2004-11-07 18:04:02 +000064
bellard1d14ffa2005-10-30 18:58:22 +000065#undef ENDIAN_CONVERT
66#undef ENDIAN_CONVERSION
67
68/* Signed 16 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +010069#define BSIZE 16
70#define ITYPE int
bellard85571bc2004-11-07 18:04:02 +000071#define IN_MIN SHRT_MIN
72#define IN_MAX SHRT_MAX
73#define SIGNED
bellard1d14ffa2005-10-30 18:58:22 +000074#define SHIFT 16
75#define ENDIAN_CONVERSION natural
76#define ENDIAN_CONVERT(v) (v)
bellard85571bc2004-11-07 18:04:02 +000077#include "mixeng_template.h"
bellard1d14ffa2005-10-30 18:58:22 +000078#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
bellard85571bc2004-11-07 18:04:02 +000085#undef SIGNED
86#undef IN_MAX
87#undef IN_MIN
Roger Pau Monnea2885382012-05-18 12:08:14 +010088#undef BSIZE
89#undef ITYPE
bellard1d14ffa2005-10-30 18:58:22 +000090#undef SHIFT
bellard85571bc2004-11-07 18:04:02 +000091
thsf941aa22007-02-17 22:19:29 +000092/* Unsigned 16 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +010093#define BSIZE 16
94#define ITYPE uint
bellard85571bc2004-11-07 18:04:02 +000095#define IN_MIN 0
96#define IN_MAX USHRT_MAX
bellard1d14ffa2005-10-30 18:58:22 +000097#define SHIFT 16
98#define ENDIAN_CONVERSION natural
99#define ENDIAN_CONVERT(v) (v)
bellard85571bc2004-11-07 18:04:02 +0000100#include "mixeng_template.h"
bellard1d14ffa2005-10-30 18:58:22 +0000101#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
bellard85571bc2004-11-07 18:04:02 +0000108#undef IN_MAX
109#undef IN_MIN
Roger Pau Monnea2885382012-05-18 12:08:14 +0100110#undef BSIZE
111#undef ITYPE
bellard1d14ffa2005-10-30 18:58:22 +0000112#undef SHIFT
bellard85571bc2004-11-07 18:04:02 +0000113
thsf941aa22007-02-17 22:19:29 +0000114/* Signed 32 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +0100115#define BSIZE 32
116#define ITYPE int
thsf941aa22007-02-17 22:19:29 +0000117#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
Roger Pau Monnea2885382012-05-18 12:08:14 +0100134#undef BSIZE
135#undef ITYPE
thsf941aa22007-02-17 22:19:29 +0000136#undef SHIFT
137
malcad483a52010-03-11 18:28:38 +0300138/* Unsigned 32 bit */
Roger Pau Monnea2885382012-05-18 12:08:14 +0100139#define BSIZE 32
140#define ITYPE uint
thsf941aa22007-02-17 22:19:29 +0000141#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
Roger Pau Monnea2885382012-05-18 12:08:14 +0100156#undef BSIZE
157#undef ITYPE
thsf941aa22007-02-17 22:19:29 +0000158#undef SHIFT
159
160t_sample *mixeng_conv[2][2][2][3] = {
bellard85571bc2004-11-07 18:04:02 +0000161 {
162 {
bellard1d14ffa2005-10-30 18:58:22 +0000163 {
164 conv_natural_uint8_t_to_mono,
thsf941aa22007-02-17 22:19:29 +0000165 conv_natural_uint16_t_to_mono,
166 conv_natural_uint32_t_to_mono
bellard1d14ffa2005-10-30 18:58:22 +0000167 },
168 {
169 conv_natural_uint8_t_to_mono,
thsf941aa22007-02-17 22:19:29 +0000170 conv_swap_uint16_t_to_mono,
171 conv_swap_uint32_t_to_mono,
bellard1d14ffa2005-10-30 18:58:22 +0000172 }
bellard85571bc2004-11-07 18:04:02 +0000173 },
174 {
bellard1d14ffa2005-10-30 18:58:22 +0000175 {
176 conv_natural_int8_t_to_mono,
thsf941aa22007-02-17 22:19:29 +0000177 conv_natural_int16_t_to_mono,
178 conv_natural_int32_t_to_mono
bellard1d14ffa2005-10-30 18:58:22 +0000179 },
180 {
181 conv_natural_int8_t_to_mono,
thsf941aa22007-02-17 22:19:29 +0000182 conv_swap_int16_t_to_mono,
183 conv_swap_int32_t_to_mono
bellard1d14ffa2005-10-30 18:58:22 +0000184 }
bellard85571bc2004-11-07 18:04:02 +0000185 }
186 },
187 {
188 {
bellard1d14ffa2005-10-30 18:58:22 +0000189 {
190 conv_natural_uint8_t_to_stereo,
thsf941aa22007-02-17 22:19:29 +0000191 conv_natural_uint16_t_to_stereo,
192 conv_natural_uint32_t_to_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000193 },
194 {
195 conv_natural_uint8_t_to_stereo,
thsf941aa22007-02-17 22:19:29 +0000196 conv_swap_uint16_t_to_stereo,
197 conv_swap_uint32_t_to_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000198 }
bellard85571bc2004-11-07 18:04:02 +0000199 },
200 {
bellard1d14ffa2005-10-30 18:58:22 +0000201 {
202 conv_natural_int8_t_to_stereo,
thsf941aa22007-02-17 22:19:29 +0000203 conv_natural_int16_t_to_stereo,
204 conv_natural_int32_t_to_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000205 },
206 {
207 conv_natural_int8_t_to_stereo,
thsf941aa22007-02-17 22:19:29 +0000208 conv_swap_int16_t_to_stereo,
209 conv_swap_int32_t_to_stereo,
bellard1d14ffa2005-10-30 18:58:22 +0000210 }
bellard85571bc2004-11-07 18:04:02 +0000211 }
212 }
213};
214
thsf941aa22007-02-17 22:19:29 +0000215f_sample *mixeng_clip[2][2][2][3] = {
bellard85571bc2004-11-07 18:04:02 +0000216 {
217 {
bellard1d14ffa2005-10-30 18:58:22 +0000218 {
219 clip_natural_uint8_t_from_mono,
thsf941aa22007-02-17 22:19:29 +0000220 clip_natural_uint16_t_from_mono,
221 clip_natural_uint32_t_from_mono
bellard1d14ffa2005-10-30 18:58:22 +0000222 },
223 {
224 clip_natural_uint8_t_from_mono,
thsf941aa22007-02-17 22:19:29 +0000225 clip_swap_uint16_t_from_mono,
226 clip_swap_uint32_t_from_mono
bellard1d14ffa2005-10-30 18:58:22 +0000227 }
bellard85571bc2004-11-07 18:04:02 +0000228 },
229 {
bellard1d14ffa2005-10-30 18:58:22 +0000230 {
231 clip_natural_int8_t_from_mono,
thsf941aa22007-02-17 22:19:29 +0000232 clip_natural_int16_t_from_mono,
233 clip_natural_int32_t_from_mono
bellard1d14ffa2005-10-30 18:58:22 +0000234 },
235 {
236 clip_natural_int8_t_from_mono,
thsf941aa22007-02-17 22:19:29 +0000237 clip_swap_int16_t_from_mono,
238 clip_swap_int32_t_from_mono
bellard1d14ffa2005-10-30 18:58:22 +0000239 }
bellard85571bc2004-11-07 18:04:02 +0000240 }
241 },
242 {
243 {
bellard1d14ffa2005-10-30 18:58:22 +0000244 {
245 clip_natural_uint8_t_from_stereo,
thsf941aa22007-02-17 22:19:29 +0000246 clip_natural_uint16_t_from_stereo,
247 clip_natural_uint32_t_from_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000248 },
249 {
250 clip_natural_uint8_t_from_stereo,
thsf941aa22007-02-17 22:19:29 +0000251 clip_swap_uint16_t_from_stereo,
252 clip_swap_uint32_t_from_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000253 }
bellard85571bc2004-11-07 18:04:02 +0000254 },
255 {
bellard1d14ffa2005-10-30 18:58:22 +0000256 {
257 clip_natural_int8_t_from_stereo,
thsf941aa22007-02-17 22:19:29 +0000258 clip_natural_int16_t_from_stereo,
259 clip_natural_int32_t_from_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000260 },
261 {
262 clip_natural_int8_t_from_stereo,
thsf941aa22007-02-17 22:19:29 +0000263 clip_swap_int16_t_from_stereo,
264 clip_swap_int32_t_from_stereo
bellard1d14ffa2005-10-30 18:58:22 +0000265 }
bellard85571bc2004-11-07 18:04:02 +0000266 }
267 }
268};
269
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100270#ifdef FLOAT_MIXENG
Volker Rümelindd381312020-03-08 20:33:17 +0100271#define CONV_NATURAL_FLOAT(x) (x)
272#define CLIP_NATURAL_FLOAT(x) (x)
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100273#else
Volker Rümelin9c61fcc2020-05-23 22:17:12 +0200274/* macros to map [-1.f, 1.f] <-> [INT32_MIN, INT32_MAX + 1] */
275static const float float_scale = (int64_t)INT32_MAX + 1;
Volker Rümelindd381312020-03-08 20:33:17 +0100276#define CONV_NATURAL_FLOAT(x) ((x) * float_scale)
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100277
278#ifdef RECIPROCAL
Volker Rümelin9c61fcc2020-05-23 22:17:12 +0200279static const float float_scale_reciprocal = 1.f / ((int64_t)INT32_MAX + 1);
Volker Rümelindd381312020-03-08 20:33:17 +0100280#define CLIP_NATURAL_FLOAT(x) ((x) * float_scale_reciprocal)
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100281#else
Volker Rümelindd381312020-03-08 20:33:17 +0100282#define CLIP_NATURAL_FLOAT(x) ((x) / float_scale)
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100283#endif
Volker Rümelin180b0442020-02-02 15:06:41 +0100284#endif
285
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100286static void conv_natural_float_to_mono(struct st_sample *dst, const void *src,
287 int samples)
288{
289 float *in = (float *)src;
290
Volker Rümelin180b0442020-02-02 15:06:41 +0100291 while (samples--) {
Volker Rümelindd381312020-03-08 20:33:17 +0100292 dst->r = dst->l = CONV_NATURAL_FLOAT(*in++);
Volker Rümelin180b0442020-02-02 15:06:41 +0100293 dst++;
294 }
295}
296
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100297static void conv_natural_float_to_stereo(struct st_sample *dst, const void *src,
298 int samples)
Volker Rümelin180b0442020-02-02 15:06:41 +0100299{
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100300 float *in = (float *)src;
Volker Rümelin180b0442020-02-02 15:06:41 +0100301
302 while (samples--) {
Volker Rümelindd381312020-03-08 20:33:17 +0100303 dst->l = CONV_NATURAL_FLOAT(*in++);
304 dst->r = CONV_NATURAL_FLOAT(*in++);
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100305 dst++;
306 }
307}
308
309t_sample *mixeng_conv_float[2] = {
310 conv_natural_float_to_mono,
311 conv_natural_float_to_stereo,
312};
313
314static void clip_natural_float_from_mono(void *dst, const struct st_sample *src,
315 int samples)
316{
317 float *out = (float *)dst;
318
319 while (samples--) {
Volker Rümelin33a93ba2020-03-08 20:33:18 +0100320 *out++ = CLIP_NATURAL_FLOAT(src->l + src->r);
Volker Rümelin180b0442020-02-02 15:06:41 +0100321 src++;
322 }
323}
Pavel Dovgalyuk3d4d16f2017-02-02 08:50:54 +0300324
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100325static void clip_natural_float_from_stereo(
326 void *dst, const struct st_sample *src, int samples)
327{
328 float *out = (float *)dst;
329
330 while (samples--) {
Volker Rümelindd381312020-03-08 20:33:17 +0100331 *out++ = CLIP_NATURAL_FLOAT(src->l);
332 *out++ = CLIP_NATURAL_FLOAT(src->r);
Kővágó, Zoltáned2a4a72020-02-02 20:38:07 +0100333 src++;
334 }
335}
336
337f_sample *mixeng_clip_float[2] = {
338 clip_natural_float_from_mono,
339 clip_natural_float_from_stereo,
340};
341
Philippe Mathieu-Daudée709d2a2020-05-05 15:25:57 +0200342void audio_sample_to_uint64(const void *samples, int pos,
Pavel Dovgalyuk3d4d16f2017-02-02 08:50:54 +0300343 uint64_t *left, uint64_t *right)
344{
Philippe Mathieu-Daudée709d2a2020-05-05 15:25:57 +0200345 const struct st_sample *sample = samples;
Pavel Dovgalyuk3d4d16f2017-02-02 08:50:54 +0300346 sample += pos;
347#ifdef FLOAT_MIXENG
348 error_report(
349 "Coreaudio and floating point samples are not supported by replay yet");
350 abort();
351#else
352 *left = sample->l;
353 *right = sample->r;
354#endif
355}
356
357void audio_sample_from_uint64(void *samples, int pos,
358 uint64_t left, uint64_t right)
359{
360 struct st_sample *sample = samples;
361 sample += pos;
362#ifdef FLOAT_MIXENG
363 error_report(
364 "Coreaudio and floating point samples are not supported by replay yet");
365 abort();
366#else
367 sample->l = left;
368 sample->r = right;
369#endif
370}
371
bellard85571bc2004-11-07 18:04:02 +0000372/*
373 * August 21, 1998
374 * Copyright 1998 Fabrice Bellard.
375 *
Stefan Weilcb8d4c82016-03-23 15:59:57 +0100376 * [Rewrote completely the code of Lance Norskog And Sundry
bellard85571bc2004-11-07 18:04:02 +0000377 * Contributors with a more efficient algorithm.]
378 *
379 * This source code is freely redistributable and may be used for
bellard1d14ffa2005-10-30 18:58:22 +0000380 * any purpose. This copyright notice must be maintained.
381 * Lance Norskog And Sundry Contributors are not responsible for
382 * the consequences of using this software.
bellard85571bc2004-11-07 18:04:02 +0000383 */
384
385/*
386 * Sound Tools rate change effect file.
387 */
388/*
389 * Linear Interpolation.
390 *
391 * The use of fractional increment allows us to use no buffer. It
392 * avoid the problems at the end of the buffer we had with the old
393 * method which stored a possibly big buffer of size
394 * lcm(in_rate,out_rate).
395 *
396 * Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
397 * the input & output frequencies are equal, a delay of one sample is
398 * introduced. Limited to processing 32-bit count worth of samples.
399 *
400 * 1 << FRAC_BITS evaluating to zero in several places. Changed with
401 * an (unsigned long) cast to make it safe. MarkMLl 2/1/99
402 */
403
404/* Private data */
bellardc0fe3822005-11-05 18:55:28 +0000405struct rate {
bellard85571bc2004-11-07 18:04:02 +0000406 uint64_t opos;
407 uint64_t opos_inc;
408 uint32_t ipos; /* position in the input stream (integer) */
malc1ea879e2008-12-03 22:48:44 +0000409 struct st_sample ilast; /* last sample in the input stream */
bellardc0fe3822005-11-05 18:55:28 +0000410};
bellard85571bc2004-11-07 18:04:02 +0000411
412/*
413 * Prepare processing.
414 */
415void *st_rate_start (int inrate, int outrate)
416{
Alistair Francis470bcab2018-02-03 09:43:02 +0100417 struct rate *rate = audio_calloc(__func__, 1, sizeof(*rate));
bellard85571bc2004-11-07 18:04:02 +0000418
419 if (!rate) {
bellarde7cad332005-11-11 00:03:36 +0000420 dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
bellard1d14ffa2005-10-30 18:58:22 +0000421 return NULL;
bellard85571bc2004-11-07 18:04:02 +0000422 }
423
424 rate->opos = 0;
425
426 /* increment */
bellard1d14ffa2005-10-30 18:58:22 +0000427 rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
bellard85571bc2004-11-07 18:04:02 +0000428
429 rate->ipos = 0;
430 rate->ilast.l = 0;
431 rate->ilast.r = 0;
432 return rate;
433}
434
bellard1d14ffa2005-10-30 18:58:22 +0000435#define NAME st_rate_flow_mix
436#define OP(a, b) a += b
437#include "rate_template.h"
bellard85571bc2004-11-07 18:04:02 +0000438
bellard1d14ffa2005-10-30 18:58:22 +0000439#define NAME st_rate_flow
440#define OP(a, b) a = b
441#include "rate_template.h"
bellard85571bc2004-11-07 18:04:02 +0000442
443void st_rate_stop (void *opaque)
444{
Anthony Liguori7267c092011-08-20 22:09:37 -0500445 g_free (opaque);
bellard85571bc2004-11-07 18:04:02 +0000446}
bellard1d14ffa2005-10-30 18:58:22 +0000447
malc1ea879e2008-12-03 22:48:44 +0000448void mixeng_clear (struct st_sample *buf, int len)
bellard1d14ffa2005-10-30 18:58:22 +0000449{
malc1ea879e2008-12-03 22:48:44 +0000450 memset (buf, 0, len * sizeof (struct st_sample));
bellard1d14ffa2005-10-30 18:58:22 +0000451}
Michael Walle00e07672011-01-05 01:05:47 +0100452
453void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
454{
Michael Walle00e07672011-01-05 01:05:47 +0100455 if (vol->mute) {
456 mixeng_clear (buf, len);
457 return;
458 }
459
460 while (len--) {
461#ifdef FLOAT_MIXENG
462 buf->l = buf->l * vol->l;
463 buf->r = buf->r * vol->r;
464#else
465 buf->l = (buf->l * vol->l) >> 32;
466 buf->r = (buf->r * vol->r) >> 32;
467#endif
468 buf += 1;
469 }
Michael Walle00e07672011-01-05 01:05:47 +0100470}