| /* |
| * 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-common.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 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 |
| |
| /* Unsigned 16 bit */ |
| #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 |
| |
| /* Signed 32 bit */ |
| #define IN_T int32_t |
| #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 IN_T |
| #undef SHIFT |
| |
| /* Unsigned 32 bit */ |
| #define IN_T uint32_t |
| #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 IN_T |
| #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 |
| } |
| } |
| } |
| }; |
| |
| /* |
| * 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) */ |
| 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 (AUDIO_FUNC, 1, sizeof (*rate)); |
| |
| if (!rate) { |
| dolog ("Could not allocate resampler (%u bytes)\n", (int)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)); |
| } |
