[deb_ffmpeg.git] / ffmpeg / libavcodec / opus_imdct.h

/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_OPUS_IMDCT_H
#define AVCODEC_OPUS_IMDCT_H

#include <stddef.h>

#include "avfft.h"

typedef struct CeltIMDCTContext {
    int fft_n;
    int len2;
    int len4;

    FFTComplex *tmp;

    FFTComplex *twiddle_exptab;

    FFTComplex *exptab[6];

    /**
     * Calculate the middle half of the iMDCT
     */
    void (*imdct_half)(struct CeltIMDCTContext *s, float *dst, const float *src,
                       ptrdiff_t src_stride, float scale);
} CeltIMDCTContext;

/**
 * Init an iMDCT of the length 2 * 15 * (2^N)
 */
int ff_celt_imdct_init(CeltIMDCTContext **s, int N);

/**
 * Free an iMDCT.
 */
void ff_celt_imdct_uninit(CeltIMDCTContext **s);


void ff_celt_imdct_init_aarch64(CeltIMDCTContext *s);

#endif /* AVCODEC_OPUS_IMDCT_H */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* This file is part of FFmpeg.
	3	*
	4	* FFmpeg is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Lesser General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2.1 of the License, or (at your option) any later version.
	8	*
	9	* FFmpeg is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Lesser General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Lesser General Public
	15	* License along with FFmpeg; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	17	*/
	18
	19	#ifndef AVCODEC_OPUS_IMDCT_H
	20	#define AVCODEC_OPUS_IMDCT_H
	21
	22	#include <stddef.h>
	23
	24	#include "avfft.h"
	25
	26	typedef struct CeltIMDCTContext {
	27	int fft_n;
	28	int len2;
	29	int len4;
	30
	31	FFTComplex *tmp;
	32
	33	FFTComplex *twiddle_exptab;
	34
	35	FFTComplex *exptab[6];
	36
	37	/**
	38	* Calculate the middle half of the iMDCT
	39	*/
	40	void (imdct_half)(struct CeltIMDCTContext s, float dst, const float src,
	41	ptrdiff_t src_stride, float scale);
	42	} CeltIMDCTContext;
	43
	44	/**
	45	* Init an iMDCT of the length 2 * 15 * (2^N)
	46	*/
	47	int ff_celt_imdct_init(CeltIMDCTContext **s, int N);
	48
	49	/**
	50	* Free an iMDCT.
	51	*/
	52	void ff_celt_imdct_uninit(CeltIMDCTContext **s);
	53
	54
	55	void ff_celt_imdct_init_aarch64(CeltIMDCTContext *s);
	56
	57	#endif /* AVCODEC_OPUS_IMDCT_H */