/* * 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 "Builtins.h" #include "../../vl_vbox.h" #include "audio.h" #include #define AUDIO_CAP "mixeng" #include "audio_int.h" #define NOVOL /* 8 bit */ #define ENDIAN_CONVERSION natural #define ENDIAN_CONVERT(v) (v) /* Signed 8 bit */ #define IN_T int8_t #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 IN_T #undef SHIFT /* Unsigned 8 bit */ #define IN_T uint8_t #define IN_MIN 0 #define IN_MAX UCHAR_MAX #define SHIFT 8 #include "mixeng_template.h" #undef IN_MAX #undef IN_MIN #undef IN_T #undef SHIFT #undef ENDIAN_CONVERT #undef ENDIAN_CONVERSION /* Signed 16 bit */ #define IN_T int16_t #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 IN_T #undef SHIFT #define IN_T uint16_t #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 IN_T #undef SHIFT t_sample *mixeng_conv[2][2][2][2] = { { { { conv_natural_uint8_t_to_mono, conv_natural_uint16_t_to_mono }, { conv_natural_uint8_t_to_mono, conv_swap_uint16_t_to_mono } }, { { conv_natural_int8_t_to_mono, conv_natural_int16_t_to_mono }, { conv_natural_int8_t_to_mono, conv_swap_int16_t_to_mono } } }, { { { conv_natural_uint8_t_to_stereo, conv_natural_uint16_t_to_stereo }, { conv_natural_uint8_t_to_stereo, conv_swap_uint16_t_to_stereo } }, { { conv_natural_int8_t_to_stereo, conv_natural_int16_t_to_stereo }, { conv_natural_int8_t_to_stereo, conv_swap_int16_t_to_stereo } } } }; f_sample *mixeng_clip[2][2][2][2] = { { { { clip_natural_uint8_t_from_mono, clip_natural_uint16_t_from_mono }, { clip_natural_uint8_t_from_mono, clip_swap_uint16_t_from_mono } }, { { clip_natural_int8_t_from_mono, clip_natural_int16_t_from_mono }, { clip_natural_int8_t_from_mono, clip_swap_int16_t_from_mono } } }, { { { clip_natural_uint8_t_from_stereo, clip_natural_uint16_t_from_stereo }, { clip_natural_uint8_t_from_stereo, clip_swap_uint16_t_from_stereo } }, { { clip_natural_int8_t_from_stereo, clip_natural_int16_t_from_stereo }, { clip_natural_int8_t_from_stereo, clip_swap_int16_t_from_stereo } } } }; /* * August 21, 1998 * Copyright 1998 Fabrice Bellard. * * [Rewrote completly 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) */ st_sample_t ilast; /* last sample in the input stream */ }; /* * Prepare processing. */ void *st_rate_start (int inrate, int outrate) { struct rate *rate = audio_calloc (AUDIO_FUNC, 1, sizeof (*rate)); if (!rate) { dolog ("Could not allocate resampler (%" FMTZ "u 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) { qemu_free (opaque); } void mixeng_clear (st_sample_t *buf, int len) { memset (buf, 0, len * sizeof (st_sample_t)); } void mixeng_sniff_and_clear (HWVoiceOut *hw, st_sample_t *src, int len) { sniffer_run_out (hw, src, len); mixeng_clear (src, len); }