4  * Copyright (c) 2004-2005 Vassili Karpov (malc)
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 #include "qemu/error-report.h"
33 /* 8 bit */
35 #define ENDIAN_CONVERT(v) (v)  argument
37 /* Signed 8 bit */
38 #define BSIZE 8
43 #define SHIFT 8
52 /* Unsigned 8 bit */
53 #define BSIZE 8
57 #define SHIFT 8
76 #define ENDIAN_CONVERT(v) (v)  argument
81 #define ENDIAN_CONVERT(v) bswap16 (v)  argument
99 #define ENDIAN_CONVERT(v) (v)  argument
104 #define ENDIAN_CONVERT(v) bswap16 (v)  argument
122 #define ENDIAN_CONVERT(v) (v)  argument
127 #define ENDIAN_CONVERT(v) bswap32 (v)  argument
145 #define ENDIAN_CONVERT(v) (v)  argument
150 #define ENDIAN_CONVERT(v) bswap32 (v)  argument
274 /* macros to map [-1.f, 1.f] <-> [INT32_MIN, INT32_MAX + 1] */
275 static const float float_scale = (int64_t)INT32_MAX + 1;
279 static const float float_scale_reciprocal = 1.f / ((int64_t)INT32_MAX + 1);
291     while (samples--) {  in conv_natural_float_to_mono()
292         dst->r = dst->l = CONV_NATURAL_FLOAT(*in++);  in conv_natural_float_to_mono()
302     while (samples--) {  in conv_natural_float_to_stereo()
303         dst->l = CONV_NATURAL_FLOAT(*in++);  in conv_natural_float_to_stereo()
304         dst->r = CONV_NATURAL_FLOAT(*in++);  in conv_natural_float_to_stereo()
319     while (samples--) {  in clip_natural_float_from_mono()
320         *out++ = CLIP_NATURAL_FLOAT(src->l + src->r);  in clip_natural_float_from_mono()
330     while (samples--) {  in clip_natural_float_from_stereo()
331         *out++ = CLIP_NATURAL_FLOAT(src->l);  in clip_natural_float_from_stereo()
332         *out++ = CLIP_NATURAL_FLOAT(src->r);  in clip_natural_float_from_stereo()
352     *left = sample->l;  in audio_sample_to_uint64()
353     *right = sample->r;  in audio_sample_to_uint64()
367     sample->l = left;  in audio_sample_from_uint64()
368     sample->r = right;  in audio_sample_from_uint64()
391  * The use of fractional increment allows us to use no buffer. It
398  * introduced.  Limited to processing 32-bit count worth of samples.
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
417     struct rate *rate = g_new0(struct rate, 1);  in st_rate_start()
419     rate->opos = 0;  in st_rate_start()
422     rate->opos_inc = ((uint64_t) inrate << 32) / outrate;  in st_rate_start()
424     rate->ipos = 0;  in st_rate_start()
425     rate->ilast.l = 0;  in st_rate_start()
426     rate->ilast.r = 0;  in st_rate_start()
444  * st_rate_frames_out() - returns the number of frames the resampling code
461     if (rate->opos_inc == 1ULL << 32) {  in st_rate_frames_out()
465     /* no output frame without at least one input frame */  in st_rate_frames_out()
470     /* last frame read was at rate->ipos - 1 */  in st_rate_frames_out()
471     ipos_end = rate->ipos - 1 + frames_in;  in st_rate_frames_out()
474     /* last frame written was at rate->opos - rate->opos_inc */  in st_rate_frames_out()
475     if (opos_end + rate->opos_inc <= rate->opos) {  in st_rate_frames_out()
478     opos_delta = opos_end - rate->opos + rate->opos_inc;  in st_rate_frames_out()
479     frames_out = opos_delta / rate->opos_inc;  in st_rate_frames_out()
481     return opos_delta % rate->opos_inc ? frames_out : frames_out - 1;  in st_rate_frames_out()
485  * st_rate_frames_in() - returns the number of frames needed to
500     if (rate->opos_inc == 1ULL << 32) {  in st_rate_frames_in()
505         opos_start = rate->opos;  in st_rate_frames_in()
506         ipos_start = rate->ipos;  in st_rate_frames_in()
511         offset = (rate->opos_inc + (1ULL << 32) - 1) & ~((1ULL << 32) - 1);  in st_rate_frames_in()
512         opos_start = rate->opos + offset;  in st_rate_frames_in()
513         ipos_start = rate->ipos + (offset >> 32);  in st_rate_frames_in()
515     /* last frame written was at opos_start - rate->opos_inc */  in st_rate_frames_in()
516     opos_end = opos_start - rate->opos_inc + rate->opos_inc * frames_out;  in st_rate_frames_in()
517     ipos_end = (opos_end >> 32) + 1;  in st_rate_frames_in()
519     /* last frame read was at ipos_start - 1 */  in st_rate_frames_in()
520     return ipos_end + 1 > ipos_start ? ipos_end + 1 - ipos_start : 0;  in st_rate_frames_in()
530     if (vol->mute) {  in mixeng_volume()
535     while (len--) {  in mixeng_volume()
537         buf->l = buf->l * vol->l;  in mixeng_volume()
538         buf->r = buf->r * vol->r;  in mixeng_volume()
540         buf->l = (buf->l * vol->l) >> 32;  in mixeng_volume()
541         buf->r = (buf->r * vol->r) >> 32;  in mixeng_volume()
543         buf += 1;  in mixeng_volume()