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
22 #ifndef AVCODEC_AACPS_H
23 #define AVCODEC_AACPS_H
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
40 #define PS_BASELINE 0 ///< Operate in Baseline PS mode
41 ///< Baseline implies 10 or 20 stereo bands,
42 ///< mixing mode A, and no ipd/opd
44 #define numQMFSlots 32 //numTimeSlots * RATE
46 typedef struct PSCommonContext {
60 int border_position[PS_MAX_NUM_ENV+1];
61 int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Intensity Difference Parameters
62 int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-Channel Coherence Parameters
63 /* ipd/opd is iid/icc sized so that the same functions can handle both */
64 int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Phase Difference Parameters
65 int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Overall Phase Difference Parameters
70 typedef struct PSContext {
71 PSCommonContext common;
73 DECLARE_ALIGNED(16, INTFLOAT, in_buf)[5][44][2];
74 DECLARE_ALIGNED(16, INTFLOAT, delay)[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
75 DECLARE_ALIGNED(16, INTFLOAT, ap_delay)[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
76 DECLARE_ALIGNED(16, INTFLOAT, peak_decay_nrg)[34];
77 DECLARE_ALIGNED(16, INTFLOAT, power_smooth)[34];
78 DECLARE_ALIGNED(16, INTFLOAT, peak_decay_diff_smooth)[34];
79 DECLARE_ALIGNED(16, INTFLOAT, H11)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
80 DECLARE_ALIGNED(16, INTFLOAT, H12)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
81 DECLARE_ALIGNED(16, INTFLOAT, H21)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
82 DECLARE_ALIGNED(16, INTFLOAT, H22)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
83 DECLARE_ALIGNED(16, INTFLOAT, Lbuf)[91][32][2];
84 DECLARE_ALIGNED(16, INTFLOAT, Rbuf)[91][32][2];
85 int8_t opd_hist[PS_MAX_NR_IIDICC];
86 int8_t ipd_hist[PS_MAX_NR_IIDICC];
90 extern const int8_t ff_k_to_i_20[];
91 extern const int8_t ff_k_to_i_34[];
93 void ff_ps_init_common(void);
94 void AAC_RENAME(ff_ps_init)(void);
95 void AAC_RENAME(ff_ps_ctx_init)(PSContext *ps);
96 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb,
97 PSCommonContext *ps, int bits_left);
98 int AAC_RENAME(ff_ps_apply)(AVCodecContext *avctx, PSContext *ps, INTFLOAT L[2][38][64], INTFLOAT R[2][38][64], int top);
100 #endif /* AVCODEC_AACPS_H */