#ifndef WH_FMTCONVERT_H_175df931_
#define WH_FMTCONVERT_H_175df931_

/*
 * This file was stolen from ffmpeg and modified for usability here.
 *  The original is
 * 
 * Copyright (c) 2000, 2001 Fabrice Bellard
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
 *
 * This version is a derivative work of that version.  It is not free
 *  software; it is licensed under the GNU Lesser General Public
 *  License version 2.1, which places nontrivial restrictions on what
 *  may be done with it.  (I'm not terribly happy about that, but for
 *  my purposes accepting LGPL-infected code is a lower price than
 *  reimplementing it all myself.)
 *
 * The LGPL v2.1 as distributed with ffmpeg is in the accompanying file
 *  `LGPL-v2.1'.
 */

#include "avcodec.h"

typedef struct FmtConvertContext {
    /**
     * Convert an array of int32_t to float and multiply by a float value.
     * @param dst destination array of float.
     *            constraints: 16-byte aligned
     * @param src source array of int32_t.
     *            constraints: 16-byte aligned
     * @param len number of elements to convert.
     *            constraints: multiple of 8
     */
    void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len);

    /**
     * Convert an array of float to an array of int16_t.
     *
     * Convert floats from in the range [-32768.0,32767.0] to ints
     * without rescaling
     *
     * @param dst destination array of int16_t.
     *            constraints: 16-byte aligned
     * @param src source array of float.
     *            constraints: 16-byte aligned
     * @param len number of elements to convert.
     *            constraints: multiple of 8
     */
    void (*float_to_int16)(int16_t *dst, const float *src, long len);

    /**
     * Convert multiple arrays of float to an interleaved array of int16_t.
     *
     * Convert floats from in the range [-32768.0,32767.0] to ints
     * without rescaling
     *
     * @param dst destination array of interleaved int16_t.
     *            constraints: 16-byte aligned
     * @param src source array of float arrays, one for each channel.
     *            constraints: 16-byte aligned
     * @param len number of elements to convert.
     *            constraints: multiple of 8
     * @param channels number of channels
     */
    void (*float_to_int16_interleave)(int16_t *dst, const float **src,
                                      long len, int channels);

    /**
     * Convert multiple arrays of float to an array of interleaved float.
     *
     * @param dst destination array of interleaved float.
     *            constraints: 16-byte aligned
     * @param src source array of float arrays, one for each channel.
     *            constraints: 16-byte aligned
     * @param len number of elements to convert.
     *            constraints: multiple of 8
     * @param channels number of channels
     */
    void (*float_interleave)(float *dst, const float **src, unsigned int len,
                             int channels);
} FmtConvertContext;

void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
                           int channels);

void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);

void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx);
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);

/* ffdshow custom code */
void float_interleave(float *dst, const float **src, long len, int channels);
void float_interleave_noscale(float *dst, const float **src, long len, int channels);

#endif