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/*
* MPEG-4 Parametric Stereo definitions and declarations
* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
*
* 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_PS_H
#define AVCODEC_PS_H

#include <stdint.h>

#include "avcodec.h"
#include "get_bits.h"

#define PS_MAX_NUM_ENV 5
#define PS_MAX_NR_IIDICC 34
#define PS_MAX_NR_IPDOPD 17
#define PS_MAX_SSB 91
#define PS_MAX_AP_BANDS 50
#define PS_QMF_TIME_SLOTS 32
#define PS_MAX_DELAY 14
#define PS_AP_LINKS 3
#define PS_MAX_AP_DELAY 5

typedef struct {
    int start;
    int enable_iid;
    int iid_quant;
    int nr_iid_par;
    int nr_ipdopd_par;
    int enable_icc;
    int icc_mode;
    int nr_icc_par;
    int enable_ext;
    int frame_class;
    int num_env_old;
    int num_env;
    int enable_ipdopd;
    int border_position[PS_MAX_NUM_ENV+1];
    int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-channel Intensity Difference Parameters
    int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-Channel Coherence Parameters
    /* ipd/opd is iid/icc sized so that the same functions can handle both */
    int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-channel Phase Difference Parameters
    int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Overall Phase Difference Parameters
    int is34bands;
    int is34bands_old;

    float in_buf[5][44][2];
    float delay[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
    float ap_delay[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
    float peak_decay_nrg[34];
    float power_smooth[34];
    float peak_decay_diff_smooth[34];
    float H11[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
    float H12[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
    float H21[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
    float H22[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
    int8_t opd_hist[PS_MAX_NR_IIDICC];
    int8_t ipd_hist[PS_MAX_NR_IIDICC];
} PSContext;

void ff_ps_init(void);
void ff_ps_ctx_init(PSContext *ps);
int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);

#endif /* AVCODEC_PS_H */
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