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ffmpeg / libavcodec / aacps.h @ 2912e87a

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/*
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 * MPEG-4 Parametric Stereo definitions and declarations
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 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_PS_H
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#define AVCODEC_PS_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "get_bits.h"
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#define PS_MAX_NUM_ENV 5
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#define PS_MAX_NR_IIDICC 34
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#define PS_MAX_NR_IPDOPD 17
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#define PS_MAX_SSB 91
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#define PS_MAX_AP_BANDS 50
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#define PS_QMF_TIME_SLOTS 32
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#define PS_MAX_DELAY 14
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#define PS_AP_LINKS 3
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#define PS_MAX_AP_DELAY 5
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typedef struct {
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    int    start;
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    int    enable_iid;
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    int    iid_quant;
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    int    nr_iid_par;
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    int    nr_ipdopd_par;
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    int    enable_icc;
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    int    icc_mode;
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    int    nr_icc_par;
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    int    enable_ext;
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    int    frame_class;
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    int    num_env_old;
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    int    num_env;
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    int    enable_ipdopd;
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    int    border_position[PS_MAX_NUM_ENV+1];
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    int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-channel Intensity Difference Parameters
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    int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-Channel Coherence Parameters
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    /* ipd/opd is iid/icc sized so that the same functions can handle both */
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    int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Inter-channel Phase Difference Parameters
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    int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; //<Overall Phase Difference Parameters
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    int    is34bands;
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    int    is34bands_old;
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    float  in_buf[5][44][2];
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    float  delay[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
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    float  ap_delay[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
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    float  peak_decay_nrg[34];
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    float  power_smooth[34];
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    float  peak_decay_diff_smooth[34];
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    float  H11[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
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    float  H12[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
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    float  H21[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
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    float  H22[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
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    int8_t opd_hist[PS_MAX_NR_IIDICC];
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    int8_t ipd_hist[PS_MAX_NR_IIDICC];
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} PSContext;
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void ff_ps_init(void);
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void ff_ps_ctx_init(PSContext *ps);
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int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
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int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
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#endif /* AVCODEC_PS_H */