xref: /openbmc/qemu/audio/mixeng.c (revision a9ea5678)
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/bswap.h"
27 #include "qemu/error-report.h"
28 #include "audio.h"
29 
30 #define AUDIO_CAP "mixeng"
31 #include "audio_int.h"
32 
33 /* 8 bit */
34 #define ENDIAN_CONVERSION natural
35 #define ENDIAN_CONVERT(v) (v)
36 
37 /* Signed 8 bit */
38 #define BSIZE 8
39 #define ITYPE int
40 #define IN_MIN SCHAR_MIN
41 #define IN_MAX SCHAR_MAX
42 #define SIGNED
43 #define SHIFT 8
44 #include "mixeng_template.h"
45 #undef SIGNED
46 #undef IN_MAX
47 #undef IN_MIN
48 #undef BSIZE
49 #undef ITYPE
50 #undef SHIFT
51 
52 /* Unsigned 8 bit */
53 #define BSIZE 8
54 #define ITYPE uint
55 #define IN_MIN 0
56 #define IN_MAX UCHAR_MAX
57 #define SHIFT 8
58 #include "mixeng_template.h"
59 #undef IN_MAX
60 #undef IN_MIN
61 #undef BSIZE
62 #undef ITYPE
63 #undef SHIFT
64 
65 #undef ENDIAN_CONVERT
66 #undef ENDIAN_CONVERSION
67 
68 /* Signed 16 bit */
69 #define BSIZE 16
70 #define ITYPE int
71 #define IN_MIN SHRT_MIN
72 #define IN_MAX SHRT_MAX
73 #define SIGNED
74 #define SHIFT 16
75 #define ENDIAN_CONVERSION natural
76 #define ENDIAN_CONVERT(v) (v)
77 #include "mixeng_template.h"
78 #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
85 #undef SIGNED
86 #undef IN_MAX
87 #undef IN_MIN
88 #undef BSIZE
89 #undef ITYPE
90 #undef SHIFT
91 
92 /* Unsigned 16 bit */
93 #define BSIZE 16
94 #define ITYPE uint
95 #define IN_MIN 0
96 #define IN_MAX USHRT_MAX
97 #define SHIFT 16
98 #define ENDIAN_CONVERSION natural
99 #define ENDIAN_CONVERT(v) (v)
100 #include "mixeng_template.h"
101 #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
108 #undef IN_MAX
109 #undef IN_MIN
110 #undef BSIZE
111 #undef ITYPE
112 #undef SHIFT
113 
114 /* Signed 32 bit */
115 #define BSIZE 32
116 #define ITYPE int
117 #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
134 #undef BSIZE
135 #undef ITYPE
136 #undef SHIFT
137 
138 /* Unsigned 32 bit */
139 #define BSIZE 32
140 #define ITYPE uint
141 #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
156 #undef BSIZE
157 #undef ITYPE
158 #undef SHIFT
159 
160 t_sample *mixeng_conv[2][2][2][3] = {
161     {
162         {
163             {
164                 conv_natural_uint8_t_to_mono,
165                 conv_natural_uint16_t_to_mono,
166                 conv_natural_uint32_t_to_mono
167             },
168             {
169                 conv_natural_uint8_t_to_mono,
170                 conv_swap_uint16_t_to_mono,
171                 conv_swap_uint32_t_to_mono,
172             }
173         },
174         {
175             {
176                 conv_natural_int8_t_to_mono,
177                 conv_natural_int16_t_to_mono,
178                 conv_natural_int32_t_to_mono
179             },
180             {
181                 conv_natural_int8_t_to_mono,
182                 conv_swap_int16_t_to_mono,
183                 conv_swap_int32_t_to_mono
184             }
185         }
186     },
187     {
188         {
189             {
190                 conv_natural_uint8_t_to_stereo,
191                 conv_natural_uint16_t_to_stereo,
192                 conv_natural_uint32_t_to_stereo
193             },
194             {
195                 conv_natural_uint8_t_to_stereo,
196                 conv_swap_uint16_t_to_stereo,
197                 conv_swap_uint32_t_to_stereo
198             }
199         },
200         {
201             {
202                 conv_natural_int8_t_to_stereo,
203                 conv_natural_int16_t_to_stereo,
204                 conv_natural_int32_t_to_stereo
205             },
206             {
207                 conv_natural_int8_t_to_stereo,
208                 conv_swap_int16_t_to_stereo,
209                 conv_swap_int32_t_to_stereo,
210             }
211         }
212     }
213 };
214 
215 f_sample *mixeng_clip[2][2][2][3] = {
216     {
217         {
218             {
219                 clip_natural_uint8_t_from_mono,
220                 clip_natural_uint16_t_from_mono,
221                 clip_natural_uint32_t_from_mono
222             },
223             {
224                 clip_natural_uint8_t_from_mono,
225                 clip_swap_uint16_t_from_mono,
226                 clip_swap_uint32_t_from_mono
227             }
228         },
229         {
230             {
231                 clip_natural_int8_t_from_mono,
232                 clip_natural_int16_t_from_mono,
233                 clip_natural_int32_t_from_mono
234             },
235             {
236                 clip_natural_int8_t_from_mono,
237                 clip_swap_int16_t_from_mono,
238                 clip_swap_int32_t_from_mono
239             }
240         }
241     },
242     {
243         {
244             {
245                 clip_natural_uint8_t_from_stereo,
246                 clip_natural_uint16_t_from_stereo,
247                 clip_natural_uint32_t_from_stereo
248             },
249             {
250                 clip_natural_uint8_t_from_stereo,
251                 clip_swap_uint16_t_from_stereo,
252                 clip_swap_uint32_t_from_stereo
253             }
254         },
255         {
256             {
257                 clip_natural_int8_t_from_stereo,
258                 clip_natural_int16_t_from_stereo,
259                 clip_natural_int32_t_from_stereo
260             },
261             {
262                 clip_natural_int8_t_from_stereo,
263                 clip_swap_int16_t_from_stereo,
264                 clip_swap_int32_t_from_stereo
265             }
266         }
267     }
268 };
269 
270 #ifdef FLOAT_MIXENG
271 #define CONV_NATURAL_FLOAT(x) (x)
272 #define CLIP_NATURAL_FLOAT(x) (x)
273 #else
274 /* macros to map [-1.f, 1.f] <-> [INT32_MIN, INT32_MAX + 1] */
275 static const float float_scale = (int64_t)INT32_MAX + 1;
276 #define CONV_NATURAL_FLOAT(x) ((x) * float_scale)
277 
278 #ifdef RECIPROCAL
279 static const float float_scale_reciprocal = 1.f / ((int64_t)INT32_MAX + 1);
280 #define CLIP_NATURAL_FLOAT(x) ((x) * float_scale_reciprocal)
281 #else
282 #define CLIP_NATURAL_FLOAT(x) ((x) / float_scale)
283 #endif
284 #endif
285 
conv_natural_float_to_mono(struct st_sample * dst,const void * src,int samples)286 static void conv_natural_float_to_mono(struct st_sample *dst, const void *src,
287                                        int samples)
288 {
289     float *in = (float *)src;
290 
291     while (samples--) {
292         dst->r = dst->l = CONV_NATURAL_FLOAT(*in++);
293         dst++;
294     }
295 }
296 
conv_natural_float_to_stereo(struct st_sample * dst,const void * src,int samples)297 static void conv_natural_float_to_stereo(struct st_sample *dst, const void *src,
298                                          int samples)
299 {
300     float *in = (float *)src;
301 
302     while (samples--) {
303         dst->l = CONV_NATURAL_FLOAT(*in++);
304         dst->r = CONV_NATURAL_FLOAT(*in++);
305         dst++;
306     }
307 }
308 
309 t_sample *mixeng_conv_float[2] = {
310     conv_natural_float_to_mono,
311     conv_natural_float_to_stereo,
312 };
313 
clip_natural_float_from_mono(void * dst,const struct st_sample * src,int samples)314 static 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--) {
320         *out++ = CLIP_NATURAL_FLOAT(src->l + src->r);
321         src++;
322     }
323 }
324 
clip_natural_float_from_stereo(void * dst,const struct st_sample * src,int samples)325 static 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--) {
331         *out++ = CLIP_NATURAL_FLOAT(src->l);
332         *out++ = CLIP_NATURAL_FLOAT(src->r);
333         src++;
334     }
335 }
336 
337 f_sample *mixeng_clip_float[2] = {
338     clip_natural_float_from_mono,
339     clip_natural_float_from_stereo,
340 };
341 
audio_sample_to_uint64(const void * samples,int pos,uint64_t * left,uint64_t * right)342 void audio_sample_to_uint64(const void *samples, int pos,
343                             uint64_t *left, uint64_t *right)
344 {
345 #ifdef FLOAT_MIXENG
346     error_report(
347         "Coreaudio and floating point samples are not supported by replay yet");
348     abort();
349 #else
350     const struct st_sample *sample = samples;
351     sample += pos;
352     *left = sample->l;
353     *right = sample->r;
354 #endif
355 }
356 
audio_sample_from_uint64(void * samples,int pos,uint64_t left,uint64_t right)357 void audio_sample_from_uint64(void *samples, int pos,
358                             uint64_t left, uint64_t right)
359 {
360 #ifdef FLOAT_MIXENG
361     error_report(
362         "Coreaudio and floating point samples are not supported by replay yet");
363     abort();
364 #else
365     struct st_sample *sample = samples;
366     sample += pos;
367     sample->l = left;
368     sample->r = right;
369 #endif
370 }
371 
372 /*
373  * August 21, 1998
374  * Copyright 1998 Fabrice Bellard.
375  *
376  * [Rewrote completely the code of Lance Norskog And Sundry
377  * Contributors with a more efficient algorithm.]
378  *
379  * This source code is freely redistributable and may be used for
380  * 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.
383  */
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 */
405 struct rate {
406     uint64_t opos;
407     uint64_t opos_inc;
408     uint32_t ipos;              /* position in the input stream (integer) */
409     struct st_sample ilast;          /* last sample in the input stream */
410 };
411 
412 /*
413  * Prepare processing.
414  */
st_rate_start(int inrate,int outrate)415 void *st_rate_start (int inrate, int outrate)
416 {
417     struct rate *rate = g_new0(struct rate, 1);
418 
419     rate->opos = 0;
420 
421     /* increment */
422     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
423 
424     rate->ipos = 0;
425     rate->ilast.l = 0;
426     rate->ilast.r = 0;
427     return rate;
428 }
429 
430 #define NAME st_rate_flow_mix
431 #define OP(a, b) a += b
432 #include "rate_template.h"
433 
434 #define NAME st_rate_flow
435 #define OP(a, b) a = b
436 #include "rate_template.h"
437 
st_rate_stop(void * opaque)438 void st_rate_stop (void *opaque)
439 {
440     g_free (opaque);
441 }
442 
443 /**
444  * st_rate_frames_out() - returns the number of frames the resampling code
445  * generates from frames_in frames
446  *
447  * @opaque: pointer to struct rate
448  * @frames_in: number of frames
449  *
450  * When upsampling, there may be more than one correct result. In this case,
451  * the function returns the maximum number of output frames the resampling
452  * code can generate.
453  */
st_rate_frames_out(void * opaque,uint32_t frames_in)454 uint32_t st_rate_frames_out(void *opaque, uint32_t frames_in)
455 {
456     struct rate *rate = opaque;
457     uint64_t opos_end, opos_delta;
458     uint32_t ipos_end;
459     uint32_t frames_out;
460 
461     if (rate->opos_inc == 1ULL << 32) {
462         return frames_in;
463     }
464 
465     /* no output frame without at least one input frame */
466     if (!frames_in) {
467         return 0;
468     }
469 
470     /* last frame read was at rate->ipos - 1 */
471     ipos_end = rate->ipos - 1 + frames_in;
472     opos_end = (uint64_t)ipos_end << 32;
473 
474     /* last frame written was at rate->opos - rate->opos_inc */
475     if (opos_end + rate->opos_inc <= rate->opos) {
476         return 0;
477     }
478     opos_delta = opos_end - rate->opos + rate->opos_inc;
479     frames_out = opos_delta / rate->opos_inc;
480 
481     return opos_delta % rate->opos_inc ? frames_out : frames_out - 1;
482 }
483 
484 /**
485  * st_rate_frames_in() - returns the number of frames needed to
486  * get frames_out frames after resampling
487  *
488  * @opaque: pointer to struct rate
489  * @frames_out: number of frames
490  *
491  * When downsampling, there may be more than one correct result. In this
492  * case, the function returns the maximum number of input frames needed.
493  */
st_rate_frames_in(void * opaque,uint32_t frames_out)494 uint32_t st_rate_frames_in(void *opaque, uint32_t frames_out)
495 {
496     struct rate *rate = opaque;
497     uint64_t opos_start, opos_end;
498     uint32_t ipos_start, ipos_end;
499 
500     if (rate->opos_inc == 1ULL << 32) {
501         return frames_out;
502     }
503 
504     if (frames_out) {
505         opos_start = rate->opos;
506         ipos_start = rate->ipos;
507     } else {
508         uint64_t offset;
509 
510         /* add offset = ceil(opos_inc) to opos and ipos to avoid an underflow */
511         offset = (rate->opos_inc + (1ULL << 32) - 1) & ~((1ULL << 32) - 1);
512         opos_start = rate->opos + offset;
513         ipos_start = rate->ipos + (offset >> 32);
514     }
515     /* last frame written was at opos_start - rate->opos_inc */
516     opos_end = opos_start - rate->opos_inc + rate->opos_inc * frames_out;
517     ipos_end = (opos_end >> 32) + 1;
518 
519     /* last frame read was at ipos_start - 1 */
520     return ipos_end + 1 > ipos_start ? ipos_end + 1 - ipos_start : 0;
521 }
522 
mixeng_clear(struct st_sample * buf,int len)523 void mixeng_clear (struct st_sample *buf, int len)
524 {
525     memset (buf, 0, len * sizeof (struct st_sample));
526 }
527 
mixeng_volume(struct st_sample * buf,int len,struct mixeng_volume * vol)528 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
529 {
530     if (vol->mute) {
531         mixeng_clear (buf, len);
532         return;
533     }
534 
535     while (len--) {
536 #ifdef FLOAT_MIXENG
537         buf->l = buf->l * vol->l;
538         buf->r = buf->r * vol->r;
539 #else
540         buf->l = (buf->l * vol->l) >> 32;
541         buf->r = (buf->r * vol->r) >> 32;
542 #endif
543         buf += 1;
544     }
545 }
546