Archipelago » qemu

/*

 * 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"

#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

/* 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 16 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) */

    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 (%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)

{

    qemu_free (opaque);

}

void mixeng_clear (st_sample_t *buf, int len)

{

    memset (buf, 0, len * sizeof (st_sample_t));

}