PeerStreamer

/*

 * 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 */