FFmpeg: libavcodec/aacps.h Source File

00001 /*
00002  * MPEG-4 Parametric Stereo definitions and declarations
00003  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef AVCODEC_PS_H
00023 #define AVCODEC_PS_H
00024 
00025 #include <stdint.h>
00026 
00027 #include "aacpsdsp.h"
00028 #include "avcodec.h"
00029 #include "get_bits.h"
00030 
00031 #define PS_MAX_NUM_ENV 5
00032 #define PS_MAX_NR_IIDICC 34
00033 #define PS_MAX_NR_IPDOPD 17
00034 #define PS_MAX_SSB 91
00035 #define PS_MAX_AP_BANDS 50
00036 #define PS_QMF_TIME_SLOTS 32
00037 #define PS_MAX_DELAY 14
00038 #define PS_AP_LINKS 3
00039 #define PS_MAX_AP_DELAY 5
00040 
00041 typedef struct {
00042     int    start;
00043     int    enable_iid;
00044     int    iid_quant;
00045     int    nr_iid_par;
00046     int    nr_ipdopd_par;
00047     int    enable_icc;
00048     int    icc_mode;
00049     int    nr_icc_par;
00050     int    enable_ext;
00051     int    frame_class;
00052     int    num_env_old;
00053     int    num_env;
00054     int    enable_ipdopd;
00055     int    border_position[PS_MAX_NUM_ENV+1];
00056     int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; 
00057     int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; 
00058     /* ipd/opd is iid/icc sized so that the same functions can handle both */
00059     int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; 
00060     int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; 
00061     int    is34bands;
00062     int    is34bands_old;
00063 
00064     DECLARE_ALIGNED(16, float, in_buf)[5][44][2];
00065     DECLARE_ALIGNED(16, float, delay)[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
00066     DECLARE_ALIGNED(16, float, ap_delay)[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
00067     DECLARE_ALIGNED(16, float, peak_decay_nrg)[34];
00068     DECLARE_ALIGNED(16, float, power_smooth)[34];
00069     DECLARE_ALIGNED(16, float, peak_decay_diff_smooth)[34];
00070     DECLARE_ALIGNED(16, float, H11)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
00071     DECLARE_ALIGNED(16, float, H12)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
00072     DECLARE_ALIGNED(16, float, H21)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
00073     DECLARE_ALIGNED(16, float, H22)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
00074     int8_t opd_hist[PS_MAX_NR_IIDICC];
00075     int8_t ipd_hist[PS_MAX_NR_IIDICC];
00076     PSDSPContext dsp;
00077 } PSContext;
00078 
00079 void ff_ps_init(void);
00080 void ff_ps_ctx_init(PSContext *ps);
00081 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
00082 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
00083 
00084 #endif /* AVCODEC_PS_H */