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80 lines
2.9 KiB
80 lines
2.9 KiB
15 years ago
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#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 */
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