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   1 /*
   2  * DCA compatible decoder
   3  * Copyright (C) 2004 Gildas Bazin
   4  * Copyright (C) 2004 Benjamin Zores
   5  * Copyright (C) 2006 Benjamin Larsson
   6  * Copyright (C) 2007 Konstantin Shishkov
   7  * Copyright (C) 2016 foo86
   8  *
   9  * This file is part of FFmpeg.
  10  *
  11  * FFmpeg is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * FFmpeg is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with FFmpeg; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  24  */
  25
  26 #ifndef AVCODEC_DCA_H
  27 #define AVCODEC_DCA_H
  28
  29 #include <stdint.h>
  30
  31 #include "libavutil/common.h"
  32 #include "libavutil/internal.h"
  33 #include "libavutil/intreadwrite.h"
  34
  35 enum DCASpeaker {
  36     DCA_SPEAKER_C,    DCA_SPEAKER_L,    DCA_SPEAKER_R,    DCA_SPEAKER_Ls,
  37     DCA_SPEAKER_Rs,   DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs,   DCA_SPEAKER_Lsr,
  38     DCA_SPEAKER_Rsr,  DCA_SPEAKER_Lss,  DCA_SPEAKER_Rss,  DCA_SPEAKER_Lc,
  39     DCA_SPEAKER_Rc,   DCA_SPEAKER_Lh,   DCA_SPEAKER_Ch,   DCA_SPEAKER_Rh,
  40     DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw,   DCA_SPEAKER_Rw,   DCA_SPEAKER_Oh,
  41     DCA_SPEAKER_Lhs,  DCA_SPEAKER_Rhs,  DCA_SPEAKER_Chr,  DCA_SPEAKER_Lhr,
  42     DCA_SPEAKER_Rhr,  DCA_SPEAKER_Cl,   DCA_SPEAKER_Ll,   DCA_SPEAKER_Rl,
  43     DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,
  44
  45     DCA_SPEAKER_COUNT
  46 };
  47
  48 enum DCASpeakerMask {
  49     DCA_SPEAKER_MASK_C     = 0x00000001,
  50     DCA_SPEAKER_MASK_L     = 0x00000002,
  51     DCA_SPEAKER_MASK_R     = 0x00000004,
  52     DCA_SPEAKER_MASK_Ls    = 0x00000008,
  53     DCA_SPEAKER_MASK_Rs    = 0x00000010,
  54     DCA_SPEAKER_MASK_LFE1  = 0x00000020,
  55     DCA_SPEAKER_MASK_Cs    = 0x00000040,
  56     DCA_SPEAKER_MASK_Lsr   = 0x00000080,
  57     DCA_SPEAKER_MASK_Rsr   = 0x00000100,
  58     DCA_SPEAKER_MASK_Lss   = 0x00000200,
  59     DCA_SPEAKER_MASK_Rss   = 0x00000400,
  60     DCA_SPEAKER_MASK_Lc    = 0x00000800,
  61     DCA_SPEAKER_MASK_Rc    = 0x00001000,
  62     DCA_SPEAKER_MASK_Lh    = 0x00002000,
  63     DCA_SPEAKER_MASK_Ch    = 0x00004000,
  64     DCA_SPEAKER_MASK_Rh    = 0x00008000,
  65     DCA_SPEAKER_MASK_LFE2  = 0x00010000,
  66     DCA_SPEAKER_MASK_Lw    = 0x00020000,
  67     DCA_SPEAKER_MASK_Rw    = 0x00040000,
  68     DCA_SPEAKER_MASK_Oh    = 0x00080000,
  69     DCA_SPEAKER_MASK_Lhs   = 0x00100000,
  70     DCA_SPEAKER_MASK_Rhs   = 0x00200000,
  71     DCA_SPEAKER_MASK_Chr   = 0x00400000,
  72     DCA_SPEAKER_MASK_Lhr   = 0x00800000,
  73     DCA_SPEAKER_MASK_Rhr   = 0x01000000,
  74     DCA_SPEAKER_MASK_Cl    = 0x02000000,
  75     DCA_SPEAKER_MASK_Ll    = 0x04000000,
  76     DCA_SPEAKER_MASK_Rl    = 0x08000000,
  77 };
  78
  79 #define DCA_SPEAKER_LAYOUT_MONO         (DCA_SPEAKER_MASK_C)
  80 #define DCA_SPEAKER_LAYOUT_STEREO       (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
  81 #define DCA_SPEAKER_LAYOUT_2POINT1      (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
  82 #define DCA_SPEAKER_LAYOUT_3_0          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
  83 #define DCA_SPEAKER_LAYOUT_2_1          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
  84 #define DCA_SPEAKER_LAYOUT_3_1          (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
  85 #define DCA_SPEAKER_LAYOUT_2_2          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
  86 #define DCA_SPEAKER_LAYOUT_5POINT0      (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
  87 #define DCA_SPEAKER_LAYOUT_5POINT1      (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
  88 #define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
  89 #define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)
  90
  91 #define DCA_HAS_STEREO(mask) \
  92     ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)
  93
  94 enum DCASpeakerPair {
  95     DCA_SPEAKER_PAIR_C      = 0x0001,
  96     DCA_SPEAKER_PAIR_LR     = 0x0002,
  97     DCA_SPEAKER_PAIR_LsRs   = 0x0004,
  98     DCA_SPEAKER_PAIR_LFE1   = 0x0008,
  99     DCA_SPEAKER_PAIR_Cs     = 0x0010,
 100     DCA_SPEAKER_PAIR_LhRh   = 0x0020,
 101     DCA_SPEAKER_PAIR_LsrRsr = 0x0040,
 102     DCA_SPEAKER_PAIR_Ch     = 0x0080,
 103     DCA_SPEAKER_PAIR_Oh     = 0x0100,
 104     DCA_SPEAKER_PAIR_LcRc   = 0x0200,
 105     DCA_SPEAKER_PAIR_LwRw   = 0x0400,
 106     DCA_SPEAKER_PAIR_LssRss = 0x0800,
 107     DCA_SPEAKER_PAIR_LFE2   = 0x1000,
 108     DCA_SPEAKER_PAIR_LhsRhs = 0x2000,
 109     DCA_SPEAKER_PAIR_Chr    = 0x4000,
 110     DCA_SPEAKER_PAIR_LhrRhr = 0x8000
 111 };
 112
 113 /**
 114  * Return number of individual channels in DCASpeakerPair mask
 115  */
 116 static inline int ff_dca_count_chs_for_mask(unsigned int mask)
 117 {
 118     return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
 119 }
 120
 121 enum DCARepresentationType {
 122     DCA_REPR_TYPE_LtRt = 2,
 123     DCA_REPR_TYPE_LhRh = 3
 124 };
 125
 126 enum DCAExtensionMask {
 127     DCA_CSS_CORE   = 0x001,
 128     DCA_CSS_XXCH   = 0x002,
 129     DCA_CSS_X96    = 0x004,
 130     DCA_CSS_XCH    = 0x008,
 131     DCA_CSS_MASK   = 0x00f,
 132     DCA_EXSS_CORE  = 0x010,
 133     DCA_EXSS_XBR   = 0x020,
 134     DCA_EXSS_XXCH  = 0x040,
 135     DCA_EXSS_X96   = 0x080,
 136     DCA_EXSS_LBR   = 0x100,
 137     DCA_EXSS_XLL   = 0x200,
 138     DCA_EXSS_RSV1  = 0x400,
 139     DCA_EXSS_RSV2  = 0x800,
 140     DCA_EXSS_MASK  = 0xff0,
 141 };
 142
 143 enum DCADownMixType {
 144     DCA_DMIX_TYPE_1_0,
 145     DCA_DMIX_TYPE_LoRo,
 146     DCA_DMIX_TYPE_LtRt,
 147     DCA_DMIX_TYPE_3_0,
 148     DCA_DMIX_TYPE_2_1,
 149     DCA_DMIX_TYPE_2_2,
 150     DCA_DMIX_TYPE_3_1,
 151
 152     DCA_DMIX_TYPE_COUNT
 153 };
 154
 155 extern av_export const uint32_t avpriv_dca_sample_rates[16];
 156
 157 extern const uint32_t ff_dca_sampling_freqs[16];
 158 extern const uint8_t ff_dca_freq_ranges[16];
 159
 160 /**
 161  * Convert bitstream to one representation based on sync marker
 162  */
 163 int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
 164                                  int max_size);
 165
 166 #endif /* AVCODEC_DCA_H */