#ifndef _AACPS_H_7ecc4397_
#define _AACPS_H_7ecc4397_

/*
 * This file was stolen from ffmpeg and modified for usability here.
 *  The original is
 * 
 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
 *
 * 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 <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