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  1. /*
  2.  * MPEG-4 Parametric Stereo definitions and declarations
  3.  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  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.
  11.  *
  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.
  16.  *
  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
  20.  */
  21.  
  22. #ifndef AVCODEC_PS_H
  23. #define AVCODEC_PS_H
  24.  
  25. #include <stdint.h>
  26.  
  27. #include "aacpsdsp.h"
  28. #include "avcodec.h"
  29. #include "get_bits.h"
  30.  
  31. #define PS_MAX_NUM_ENV 5
  32. #define PS_MAX_NR_IIDICC 34
  33. #define PS_MAX_NR_IPDOPD 17
  34. #define PS_MAX_SSB 91
  35. #define PS_MAX_AP_BANDS 50
  36. #define PS_QMF_TIME_SLOTS 32
  37. #define PS_MAX_DELAY 14
  38. #define PS_AP_LINKS 3
  39. #define PS_MAX_AP_DELAY 5
  40.  
  41. typedef struct PSContext {
  42.     int    start;
  43.     int    enable_iid;
  44.     int    iid_quant;
  45.     int    nr_iid_par;
  46.     int    nr_ipdopd_par;
  47.     int    enable_icc;
  48.     int    icc_mode;
  49.     int    nr_icc_par;
  50.     int    enable_ext;
  51.     int    frame_class;
  52.     int    num_env_old;
  53.     int    num_env;
  54.     int    enable_ipdopd;
  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
  61.     int    is34bands;
  62.     int    is34bands_old;
  63.  
  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.     int8_t opd_hist[PS_MAX_NR_IIDICC];
  75.     int8_t ipd_hist[PS_MAX_NR_IIDICC];
  76.     PSDSPContext dsp;
  77. } PSContext;
  78.  
  79. void ff_ps_init(void);
  80. void ff_ps_ctx_init(PSContext *ps);
  81. int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
  82. int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
  83.  
  84. #endif /* AVCODEC_PS_H */
  85.