Revision 1d14ffa9 audio/mixeng.c
| b/audio/mixeng.c | ||
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| 1 | 1 |
/* |
| 2 | 2 |
* QEMU Mixing engine |
| 3 | 3 |
* |
| 4 |
* Copyright (c) 2004 Vassili Karpov (malc) |
|
| 4 |
* Copyright (c) 2004-2005 Vassili Karpov (malc)
|
|
| 5 | 5 |
* Copyright (c) 1998 Fabrice Bellard |
| 6 | 6 |
* |
| 7 | 7 |
* Permission is hereby granted, free of charge, to any person obtaining a copy |
| ... | ... | |
| 23 | 23 |
* THE SOFTWARE. |
| 24 | 24 |
*/ |
| 25 | 25 |
#include "vl.h" |
| 26 |
//#define DEBUG_FP |
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| 27 |
#include "audio/mixeng.h" |
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| 28 | 26 |
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#define AUDIO_CAP "mixeng" |
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#include "audio_int.h" |
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#define NOVOL |
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/* 8 bit */ |
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#define ENDIAN_CONVERSION natural |
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#define ENDIAN_CONVERT(v) (v) |
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/* Signed 8 bit */ |
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#define IN_T int8_t |
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#define IN_MIN CHAR_MIN |
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#define IN_MAX CHAR_MAX |
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#define IN_MIN SCHAR_MIN
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#define IN_MAX SCHAR_MAX
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#define SIGNED |
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#define SHIFT 8 |
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| 33 | 42 |
#include "mixeng_template.h" |
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#undef SIGNED |
| 35 | 44 |
#undef IN_MAX |
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#undef IN_MIN |
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#undef IN_T |
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#undef SHIFT |
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/* Unsigned 8 bit */ |
|
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#define IN_T uint8_t |
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#define IN_MIN 0 |
| 41 | 52 |
#define IN_MAX UCHAR_MAX |
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#define SHIFT 8 |
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| 42 | 54 |
#include "mixeng_template.h" |
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#undef IN_MAX |
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#undef IN_MIN |
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#undef IN_T |
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#undef SHIFT |
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|
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#undef ENDIAN_CONVERT |
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#undef ENDIAN_CONVERSION |
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/* Signed 16 bit */ |
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#define IN_T int16_t |
| 48 | 65 |
#define IN_MIN SHRT_MIN |
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#define IN_MAX SHRT_MAX |
| 50 | 67 |
#define SIGNED |
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#define SHIFT 16 |
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#define ENDIAN_CONVERSION natural |
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#define ENDIAN_CONVERT(v) (v) |
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#include "mixeng_template.h" |
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#undef ENDIAN_CONVERT |
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#undef ENDIAN_CONVERSION |
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#define ENDIAN_CONVERSION swap |
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#define ENDIAN_CONVERT(v) bswap16 (v) |
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#include "mixeng_template.h" |
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#undef ENDIAN_CONVERT |
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#undef ENDIAN_CONVERSION |
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#undef SIGNED |
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#undef IN_MAX |
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#undef IN_MIN |
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#undef IN_T |
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#undef SHIFT |
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#define IN_T uint16_t |
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#define IN_MIN 0 |
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#define IN_MAX USHRT_MAX |
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#define SHIFT 16 |
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#define ENDIAN_CONVERSION natural |
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#define ENDIAN_CONVERT(v) (v) |
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#include "mixeng_template.h" |
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#undef ENDIAN_CONVERT |
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#undef ENDIAN_CONVERSION |
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#define ENDIAN_CONVERSION swap |
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#define ENDIAN_CONVERT(v) bswap16 (v) |
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#include "mixeng_template.h" |
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#undef ENDIAN_CONVERT |
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#undef ENDIAN_CONVERSION |
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#undef IN_MAX |
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#undef IN_MIN |
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#undef IN_T |
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#undef SHIFT |
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t_sample *mixeng_conv[2][2][2] = {
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t_sample *mixeng_conv[2][2][2][2] = {
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{
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{
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conv_uint8_t_to_mono, |
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conv_uint16_t_to_mono |
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{
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conv_natural_uint8_t_to_mono, |
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conv_natural_uint16_t_to_mono |
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}, |
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{
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conv_natural_uint8_t_to_mono, |
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conv_swap_uint16_t_to_mono |
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} |
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}, |
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{
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conv_int8_t_to_mono, |
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conv_int16_t_to_mono |
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{
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conv_natural_int8_t_to_mono, |
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conv_natural_int16_t_to_mono |
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}, |
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{
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conv_natural_int8_t_to_mono, |
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conv_swap_int16_t_to_mono |
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} |
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} |
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}, |
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{
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{
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conv_uint8_t_to_stereo, |
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conv_uint16_t_to_stereo |
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{
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conv_natural_uint8_t_to_stereo, |
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conv_natural_uint16_t_to_stereo |
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}, |
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{
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conv_natural_uint8_t_to_stereo, |
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conv_swap_uint16_t_to_stereo |
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} |
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}, |
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{
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conv_int8_t_to_stereo, |
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conv_int16_t_to_stereo |
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{
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conv_natural_int8_t_to_stereo, |
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conv_natural_int16_t_to_stereo |
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}, |
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{
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conv_natural_int8_t_to_stereo, |
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conv_swap_int16_t_to_stereo |
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} |
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} |
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} |
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}; |
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f_sample *mixeng_clip[2][2][2] = {
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f_sample *mixeng_clip[2][2][2][2] = {
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{
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{
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clip_uint8_t_from_mono, |
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clip_uint16_t_from_mono |
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{
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clip_natural_uint8_t_from_mono, |
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clip_natural_uint16_t_from_mono |
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}, |
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{
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clip_natural_uint8_t_from_mono, |
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clip_swap_uint16_t_from_mono |
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} |
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}, |
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{
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clip_int8_t_from_mono, |
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clip_int16_t_from_mono |
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{
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clip_natural_int8_t_from_mono, |
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clip_natural_int16_t_from_mono |
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}, |
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{
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clip_natural_int8_t_from_mono, |
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clip_swap_int16_t_from_mono |
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} |
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} |
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}, |
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{
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{
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clip_uint8_t_from_stereo, |
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clip_uint16_t_from_stereo |
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{
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clip_natural_uint8_t_from_stereo, |
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clip_natural_uint16_t_from_stereo |
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}, |
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{
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clip_natural_uint8_t_from_stereo, |
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clip_swap_uint16_t_from_stereo |
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} |
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}, |
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{
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clip_int8_t_from_stereo, |
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clip_int16_t_from_stereo |
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{
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clip_natural_int8_t_from_stereo, |
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clip_natural_int16_t_from_stereo |
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}, |
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{
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clip_natural_int8_t_from_stereo, |
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clip_swap_int16_t_from_stereo |
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} |
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} |
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} |
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}; |
| ... | ... | |
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* Contributors with a more efficient algorithm.] |
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* |
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* This source code is freely redistributable and may be used for |
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* any purpose. This copyright notice must be maintained.
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* Lance Norskog And Sundry Contributors are not responsible for
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* the consequences of using this software.
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* any purpose. This copyright notice must be maintained. |
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* Lance Norskog And Sundry Contributors are not responsible for |
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* the consequences of using this software. |
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*/ |
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/* |
| ... | ... | |
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rate_t rate = (rate_t) qemu_mallocz (sizeof (struct ratestuff)); |
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if (!rate) {
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exit (EXIT_FAILURE); |
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} |
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if (inrate == outrate) {
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// exit (EXIT_FAILURE); |
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} |
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if (inrate >= 65535 || outrate >= 65535) {
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// exit (EXIT_FAILURE); |
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return NULL; |
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} |
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rate->opos = 0; |
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/* increment */ |
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rate->opos_inc = (inrate * ((int64_t) UINT_MAX)) / outrate;
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rate->opos_inc = ((uint64_t) inrate << 32) / outrate;
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rate->ipos = 0; |
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rate->ilast.l = 0; |
| ... | ... | |
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return rate; |
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} |
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|
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/* |
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* Processed signed long samples from ibuf to obuf. |
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* Return number of samples processed. |
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*/ |
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void st_rate_flow (void *opaque, st_sample_t *ibuf, st_sample_t *obuf, |
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int *isamp, int *osamp) |
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{
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rate_t rate = (rate_t) opaque; |
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st_sample_t *istart, *iend; |
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st_sample_t *ostart, *oend; |
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st_sample_t ilast, icur, out; |
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int64_t t; |
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ilast = rate->ilast; |
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istart = ibuf; |
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iend = ibuf + *isamp; |
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#define NAME st_rate_flow_mix |
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#define OP(a, b) a += b |
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#include "rate_template.h" |
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ostart = obuf; |
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oend = obuf + *osamp; |
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if (rate->opos_inc == 1ULL << 32) {
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int i, n = *isamp > *osamp ? *osamp : *isamp; |
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for (i = 0; i < n; i++) {
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obuf[i].l += ibuf[i].r; |
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obuf[i].r += ibuf[i].r; |
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} |
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*isamp = n; |
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*osamp = n; |
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return; |
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} |
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while (obuf < oend) {
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/* Safety catch to make sure we have input samples. */ |
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if (ibuf >= iend) |
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break; |
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/* read as many input samples so that ipos > opos */ |
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while (rate->ipos <= (rate->opos >> 32)) {
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ilast = *ibuf++; |
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rate->ipos++; |
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/* See if we finished the input buffer yet */ |
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if (ibuf >= iend) goto the_end; |
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} |
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icur = *ibuf; |
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|
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/* interpolate */ |
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t = rate->opos & 0xffffffff; |
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out.l = (ilast.l * (INT_MAX - t) + icur.l * t) / INT_MAX; |
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out.r = (ilast.r * (INT_MAX - t) + icur.r * t) / INT_MAX; |
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|
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/* output sample & increment position */ |
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#if 0 |
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*obuf++ = out; |
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#else |
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obuf->l += out.l; |
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obuf->r += out.r; |
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obuf += 1; |
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#endif |
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rate->opos += rate->opos_inc; |
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} |
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|
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the_end: |
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*isamp = ibuf - istart; |
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*osamp = obuf - ostart; |
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rate->ilast = ilast; |
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} |
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#define NAME st_rate_flow |
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#define OP(a, b) a = b |
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#include "rate_template.h" |
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| 251 | 267 |
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void st_rate_stop (void *opaque) |
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{
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qemu_free (opaque); |
| 255 | 271 |
} |
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|
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void mixeng_clear (st_sample_t *buf, int len) |
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{
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memset (buf, 0, len * sizeof (st_sample_t)); |
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} |
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