2 * MPEG-4 Parametric Stereo definitions and declarations
3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #define PS_MAX_NUM_ENV 5
31 #define PS_MAX_NR_IIDICC 34
32 #define PS_MAX_NR_IPDOPD 17
34 #define PS_MAX_AP_BANDS 50
35 #define PS_QMF_TIME_SLOTS 32
36 #define PS_MAX_DELAY 14
38 #define PS_MAX_AP_DELAY 5
54 int border_position[PS_MAX_NUM_ENV+1];
55 int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Intensity Difference Parameters
56 int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-Channel Coherence Parameters
57 /* ipd/opd is iid/icc sized so that the same functions can handle both */
58 int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Phase Difference Parameters
59 int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Overall Phase Difference Parameters
63 float in_buf[5][44][2];
64 float delay[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
65 float ap_delay[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
66 float peak_decay_nrg[34];
67 float power_smooth[34];
68 float peak_decay_diff_smooth[34];
69 float H11[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
70 float H12[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
71 float H21[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
72 float H22[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
73 int8_t opd_hist[PS_MAX_NR_IIDICC];
74 int8_t ipd_hist[PS_MAX_NR_IIDICC];
77 void ff_ps_init(void);
78 void ff_ps_ctx_init(PSContext *ps);
79 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
80 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
82 #endif /* AVCODEC_PS_H */