2 * MPEG-4 Parametric Stereo definitions and declarations
3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31 #define PS_MAX_NUM_ENV 5
32 #define PS_MAX_NR_IIDICC 34
33 #define PS_MAX_NR_IPDOPD 17
35 #define PS_MAX_AP_BANDS 50
36 #define PS_QMF_TIME_SLOTS 32
37 #define PS_MAX_DELAY 14
39 #define PS_MAX_AP_DELAY 5
41 typedef struct PSContext {
55 int border_position[PS_MAX_NUM_ENV+1];
56 int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Intensity Difference Parameters
57 int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-Channel Coherence Parameters
58 /* ipd/opd is iid/icc sized so that the same functions can handle both */
59 int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Phase Difference Parameters
60 int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Overall Phase Difference Parameters
64 DECLARE_ALIGNED(16, float, in_buf)[5][44][2];
65 DECLARE_ALIGNED(16, float, delay)[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
66 DECLARE_ALIGNED(16, float, ap_delay)[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
67 DECLARE_ALIGNED(16, float, peak_decay_nrg)[34];
68 DECLARE_ALIGNED(16, float, power_smooth)[34];
69 DECLARE_ALIGNED(16, float, peak_decay_diff_smooth)[34];
70 DECLARE_ALIGNED(16, float, H11)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
71 DECLARE_ALIGNED(16, float, H12)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
72 DECLARE_ALIGNED(16, float, H21)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
73 DECLARE_ALIGNED(16, float, H22)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
74 DECLARE_ALIGNED(16, float, Lbuf)[91][32][2];
75 DECLARE_ALIGNED(16, float, Rbuf)[91][32][2];
76 int8_t opd_hist[PS_MAX_NR_IIDICC];
77 int8_t ipd_hist[PS_MAX_NR_IIDICC];
81 void ff_ps_init(void);
82 void ff_ps_ctx_init(PSContext *ps);
83 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
84 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
86 #endif /* AVCODEC_PS_H */