4218fdd77f
Currently the internal float range of the mixing engine is [-.5f, .5f]. PulseAudio, SDL2 and libasound use a [-1.f, 1.f] range. This means with float samples the audio playback volume is 6dB too low and audio recording signals will be clipped in most cases. To avoid another scaling factor in the conv_natural_float_* and clip_natural_float_* functions with FLOAT_MIXENG defined this patch changes the mixing engine float range to [-1.f, 1.f]. Signed-off-by: Volker Rümelin <vr_qemu@t-online.de> Message-id: 20200308193321.20668-4-vr_qemu@t-online.de Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
470 lines
12 KiB
C
470 lines
12 KiB
C
/*
|
|
* QEMU Mixing engine
|
|
*
|
|
* Copyright (c) 2004-2005 Vassili Karpov (malc)
|
|
* Copyright (c) 1998 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/bswap.h"
|
|
#include "qemu/error-report.h"
|
|
#include "audio.h"
|
|
|
|
#define AUDIO_CAP "mixeng"
|
|
#include "audio_int.h"
|
|
|
|
/* 8 bit */
|
|
#define ENDIAN_CONVERSION natural
|
|
#define ENDIAN_CONVERT(v) (v)
|
|
|
|
/* Signed 8 bit */
|
|
#define BSIZE 8
|
|
#define ITYPE int
|
|
#define IN_MIN SCHAR_MIN
|
|
#define IN_MAX SCHAR_MAX
|
|
#define SIGNED
|
|
#define SHIFT 8
|
|
#include "mixeng_template.h"
|
|
#undef SIGNED
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
/* Unsigned 8 bit */
|
|
#define BSIZE 8
|
|
#define ITYPE uint
|
|
#define IN_MIN 0
|
|
#define IN_MAX UCHAR_MAX
|
|
#define SHIFT 8
|
|
#include "mixeng_template.h"
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
|
|
/* Signed 16 bit */
|
|
#define BSIZE 16
|
|
#define ITYPE int
|
|
#define IN_MIN SHRT_MIN
|
|
#define IN_MAX SHRT_MAX
|
|
#define SIGNED
|
|
#define SHIFT 16
|
|
#define ENDIAN_CONVERSION natural
|
|
#define ENDIAN_CONVERT(v) (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#define ENDIAN_CONVERSION swap
|
|
#define ENDIAN_CONVERT(v) bswap16 (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#undef SIGNED
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
/* Unsigned 16 bit */
|
|
#define BSIZE 16
|
|
#define ITYPE uint
|
|
#define IN_MIN 0
|
|
#define IN_MAX USHRT_MAX
|
|
#define SHIFT 16
|
|
#define ENDIAN_CONVERSION natural
|
|
#define ENDIAN_CONVERT(v) (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#define ENDIAN_CONVERSION swap
|
|
#define ENDIAN_CONVERT(v) bswap16 (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
/* Signed 32 bit */
|
|
#define BSIZE 32
|
|
#define ITYPE int
|
|
#define IN_MIN INT32_MIN
|
|
#define IN_MAX INT32_MAX
|
|
#define SIGNED
|
|
#define SHIFT 32
|
|
#define ENDIAN_CONVERSION natural
|
|
#define ENDIAN_CONVERT(v) (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#define ENDIAN_CONVERSION swap
|
|
#define ENDIAN_CONVERT(v) bswap32 (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#undef SIGNED
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
/* Unsigned 32 bit */
|
|
#define BSIZE 32
|
|
#define ITYPE uint
|
|
#define IN_MIN 0
|
|
#define IN_MAX UINT32_MAX
|
|
#define SHIFT 32
|
|
#define ENDIAN_CONVERSION natural
|
|
#define ENDIAN_CONVERT(v) (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#define ENDIAN_CONVERSION swap
|
|
#define ENDIAN_CONVERT(v) bswap32 (v)
|
|
#include "mixeng_template.h"
|
|
#undef ENDIAN_CONVERT
|
|
#undef ENDIAN_CONVERSION
|
|
#undef IN_MAX
|
|
#undef IN_MIN
|
|
#undef BSIZE
|
|
#undef ITYPE
|
|
#undef SHIFT
|
|
|
|
t_sample *mixeng_conv[2][2][2][3] = {
|
|
{
|
|
{
|
|
{
|
|
conv_natural_uint8_t_to_mono,
|
|
conv_natural_uint16_t_to_mono,
|
|
conv_natural_uint32_t_to_mono
|
|
},
|
|
{
|
|
conv_natural_uint8_t_to_mono,
|
|
conv_swap_uint16_t_to_mono,
|
|
conv_swap_uint32_t_to_mono,
|
|
}
|
|
},
|
|
{
|
|
{
|
|
conv_natural_int8_t_to_mono,
|
|
conv_natural_int16_t_to_mono,
|
|
conv_natural_int32_t_to_mono
|
|
},
|
|
{
|
|
conv_natural_int8_t_to_mono,
|
|
conv_swap_int16_t_to_mono,
|
|
conv_swap_int32_t_to_mono
|
|
}
|
|
}
|
|
},
|
|
{
|
|
{
|
|
{
|
|
conv_natural_uint8_t_to_stereo,
|
|
conv_natural_uint16_t_to_stereo,
|
|
conv_natural_uint32_t_to_stereo
|
|
},
|
|
{
|
|
conv_natural_uint8_t_to_stereo,
|
|
conv_swap_uint16_t_to_stereo,
|
|
conv_swap_uint32_t_to_stereo
|
|
}
|
|
},
|
|
{
|
|
{
|
|
conv_natural_int8_t_to_stereo,
|
|
conv_natural_int16_t_to_stereo,
|
|
conv_natural_int32_t_to_stereo
|
|
},
|
|
{
|
|
conv_natural_int8_t_to_stereo,
|
|
conv_swap_int16_t_to_stereo,
|
|
conv_swap_int32_t_to_stereo,
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
f_sample *mixeng_clip[2][2][2][3] = {
|
|
{
|
|
{
|
|
{
|
|
clip_natural_uint8_t_from_mono,
|
|
clip_natural_uint16_t_from_mono,
|
|
clip_natural_uint32_t_from_mono
|
|
},
|
|
{
|
|
clip_natural_uint8_t_from_mono,
|
|
clip_swap_uint16_t_from_mono,
|
|
clip_swap_uint32_t_from_mono
|
|
}
|
|
},
|
|
{
|
|
{
|
|
clip_natural_int8_t_from_mono,
|
|
clip_natural_int16_t_from_mono,
|
|
clip_natural_int32_t_from_mono
|
|
},
|
|
{
|
|
clip_natural_int8_t_from_mono,
|
|
clip_swap_int16_t_from_mono,
|
|
clip_swap_int32_t_from_mono
|
|
}
|
|
}
|
|
},
|
|
{
|
|
{
|
|
{
|
|
clip_natural_uint8_t_from_stereo,
|
|
clip_natural_uint16_t_from_stereo,
|
|
clip_natural_uint32_t_from_stereo
|
|
},
|
|
{
|
|
clip_natural_uint8_t_from_stereo,
|
|
clip_swap_uint16_t_from_stereo,
|
|
clip_swap_uint32_t_from_stereo
|
|
}
|
|
},
|
|
{
|
|
{
|
|
clip_natural_int8_t_from_stereo,
|
|
clip_natural_int16_t_from_stereo,
|
|
clip_natural_int32_t_from_stereo
|
|
},
|
|
{
|
|
clip_natural_int8_t_from_stereo,
|
|
clip_swap_int16_t_from_stereo,
|
|
clip_swap_int32_t_from_stereo
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
#ifdef FLOAT_MIXENG
|
|
#define CONV_NATURAL_FLOAT(x) (x)
|
|
#define CLIP_NATURAL_FLOAT(x) (x)
|
|
#else
|
|
static const float float_scale = UINT_MAX / 2.f;
|
|
#define CONV_NATURAL_FLOAT(x) ((x) * float_scale)
|
|
|
|
#ifdef RECIPROCAL
|
|
static const float float_scale_reciprocal = 2.f / UINT_MAX;
|
|
#define CLIP_NATURAL_FLOAT(x) ((x) * float_scale_reciprocal)
|
|
#else
|
|
#define CLIP_NATURAL_FLOAT(x) ((x) / float_scale)
|
|
#endif
|
|
#endif
|
|
|
|
static void conv_natural_float_to_mono(struct st_sample *dst, const void *src,
|
|
int samples)
|
|
{
|
|
float *in = (float *)src;
|
|
|
|
while (samples--) {
|
|
dst->r = dst->l = CONV_NATURAL_FLOAT(*in++);
|
|
dst++;
|
|
}
|
|
}
|
|
|
|
static void conv_natural_float_to_stereo(struct st_sample *dst, const void *src,
|
|
int samples)
|
|
{
|
|
float *in = (float *)src;
|
|
|
|
while (samples--) {
|
|
dst->l = CONV_NATURAL_FLOAT(*in++);
|
|
dst->r = CONV_NATURAL_FLOAT(*in++);
|
|
dst++;
|
|
}
|
|
}
|
|
|
|
t_sample *mixeng_conv_float[2] = {
|
|
conv_natural_float_to_mono,
|
|
conv_natural_float_to_stereo,
|
|
};
|
|
|
|
static void clip_natural_float_from_mono(void *dst, const struct st_sample *src,
|
|
int samples)
|
|
{
|
|
float *out = (float *)dst;
|
|
|
|
while (samples--) {
|
|
*out++ = CLIP_NATURAL_FLOAT(src->l + src->r);
|
|
src++;
|
|
}
|
|
}
|
|
|
|
static void clip_natural_float_from_stereo(
|
|
void *dst, const struct st_sample *src, int samples)
|
|
{
|
|
float *out = (float *)dst;
|
|
|
|
while (samples--) {
|
|
*out++ = CLIP_NATURAL_FLOAT(src->l);
|
|
*out++ = CLIP_NATURAL_FLOAT(src->r);
|
|
src++;
|
|
}
|
|
}
|
|
|
|
f_sample *mixeng_clip_float[2] = {
|
|
clip_natural_float_from_mono,
|
|
clip_natural_float_from_stereo,
|
|
};
|
|
|
|
void audio_sample_to_uint64(void *samples, int pos,
|
|
uint64_t *left, uint64_t *right)
|
|
{
|
|
struct st_sample *sample = samples;
|
|
sample += pos;
|
|
#ifdef FLOAT_MIXENG
|
|
error_report(
|
|
"Coreaudio and floating point samples are not supported by replay yet");
|
|
abort();
|
|
#else
|
|
*left = sample->l;
|
|
*right = sample->r;
|
|
#endif
|
|
}
|
|
|
|
void audio_sample_from_uint64(void *samples, int pos,
|
|
uint64_t left, uint64_t right)
|
|
{
|
|
struct st_sample *sample = samples;
|
|
sample += pos;
|
|
#ifdef FLOAT_MIXENG
|
|
error_report(
|
|
"Coreaudio and floating point samples are not supported by replay yet");
|
|
abort();
|
|
#else
|
|
sample->l = left;
|
|
sample->r = right;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* August 21, 1998
|
|
* Copyright 1998 Fabrice Bellard.
|
|
*
|
|
* [Rewrote completely the code of Lance Norskog And Sundry
|
|
* Contributors with a more efficient algorithm.]
|
|
*
|
|
* This source code is freely redistributable and may be used for
|
|
* any purpose. This copyright notice must be maintained.
|
|
* Lance Norskog And Sundry Contributors are not responsible for
|
|
* the consequences of using this software.
|
|
*/
|
|
|
|
/*
|
|
* Sound Tools rate change effect file.
|
|
*/
|
|
/*
|
|
* Linear Interpolation.
|
|
*
|
|
* The use of fractional increment allows us to use no buffer. It
|
|
* avoid the problems at the end of the buffer we had with the old
|
|
* method which stored a possibly big buffer of size
|
|
* lcm(in_rate,out_rate).
|
|
*
|
|
* Limited to 16 bit samples and sampling frequency <= 65535 Hz. If
|
|
* the input & output frequencies are equal, a delay of one sample is
|
|
* introduced. Limited to processing 32-bit count worth of samples.
|
|
*
|
|
* 1 << FRAC_BITS evaluating to zero in several places. Changed with
|
|
* an (unsigned long) cast to make it safe. MarkMLl 2/1/99
|
|
*/
|
|
|
|
/* Private data */
|
|
struct rate {
|
|
uint64_t opos;
|
|
uint64_t opos_inc;
|
|
uint32_t ipos; /* position in the input stream (integer) */
|
|
struct st_sample ilast; /* last sample in the input stream */
|
|
};
|
|
|
|
/*
|
|
* Prepare processing.
|
|
*/
|
|
void *st_rate_start (int inrate, int outrate)
|
|
{
|
|
struct rate *rate = audio_calloc(__func__, 1, sizeof(*rate));
|
|
|
|
if (!rate) {
|
|
dolog ("Could not allocate resampler (%zu bytes)\n", sizeof (*rate));
|
|
return NULL;
|
|
}
|
|
|
|
rate->opos = 0;
|
|
|
|
/* increment */
|
|
rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
|
|
|
|
rate->ipos = 0;
|
|
rate->ilast.l = 0;
|
|
rate->ilast.r = 0;
|
|
return rate;
|
|
}
|
|
|
|
#define NAME st_rate_flow_mix
|
|
#define OP(a, b) a += b
|
|
#include "rate_template.h"
|
|
|
|
#define NAME st_rate_flow
|
|
#define OP(a, b) a = b
|
|
#include "rate_template.h"
|
|
|
|
void st_rate_stop (void *opaque)
|
|
{
|
|
g_free (opaque);
|
|
}
|
|
|
|
void mixeng_clear (struct st_sample *buf, int len)
|
|
{
|
|
memset (buf, 0, len * sizeof (struct st_sample));
|
|
}
|
|
|
|
void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
|
|
{
|
|
if (vol->mute) {
|
|
mixeng_clear (buf, len);
|
|
return;
|
|
}
|
|
|
|
while (len--) {
|
|
#ifdef FLOAT_MIXENG
|
|
buf->l = buf->l * vol->l;
|
|
buf->r = buf->r * vol->r;
|
|
#else
|
|
buf->l = (buf->l * vol->l) >> 32;
|
|
buf->r = (buf->r * vol->r) >> 32;
|
|
#endif
|
|
buf += 1;
|
|
}
|
|
}
|