FFmpeg: libavformat/mov_chan.c Source File

00001 /*
00002  * Copyright (c) 2011 Justin Ruggles
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * Libav is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with Libav; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00026 #include <stdint.h>
00027 
00028 #include "libavutil/audioconvert.h"
00029 #include "libavcodec/avcodec.h"
00030 #include "mov_chan.h"
00031 
00047 enum MovChannelLayoutTag {
00048     MOV_CH_LAYOUT_UNKNOWN               = 0xFFFF0000,
00049     MOV_CH_LAYOUT_USE_DESCRIPTIONS      = (  0 << 16) | 0,
00050     MOV_CH_LAYOUT_USE_BITMAP            = (  1 << 16) | 0,
00051     MOV_CH_LAYOUT_DISCRETEINORDER       = (147 << 16) | 0,
00052     MOV_CH_LAYOUT_MONO                  = (100 << 16) | 1,
00053     MOV_CH_LAYOUT_STEREO                = (101 << 16) | 2,
00054     MOV_CH_LAYOUT_STEREOHEADPHONES      = (102 << 16) | 2,
00055     MOV_CH_LAYOUT_MATRIXSTEREO          = (103 << 16) | 2,
00056     MOV_CH_LAYOUT_MIDSIDE               = (104 << 16) | 2,
00057     MOV_CH_LAYOUT_XY                    = (105 << 16) | 2,
00058     MOV_CH_LAYOUT_BINAURAL              = (106 << 16) | 2,
00059     MOV_CH_LAYOUT_AMBISONIC_B_FORMAT    = (107 << 16) | 4,
00060     MOV_CH_LAYOUT_QUADRAPHONIC          = (108 << 16) | 4,
00061     MOV_CH_LAYOUT_PENTAGONAL            = (109 << 16) | 5,
00062     MOV_CH_LAYOUT_HEXAGONAL             = (110 << 16) | 6,
00063     MOV_CH_LAYOUT_OCTAGONAL             = (111 << 16) | 8,
00064     MOV_CH_LAYOUT_CUBE                  = (112 << 16) | 8,
00065     MOV_CH_LAYOUT_MPEG_3_0_A            = (113 << 16) | 3,
00066     MOV_CH_LAYOUT_MPEG_3_0_B            = (114 << 16) | 3,
00067     MOV_CH_LAYOUT_MPEG_4_0_A            = (115 << 16) | 4,
00068     MOV_CH_LAYOUT_MPEG_4_0_B            = (116 << 16) | 4,
00069     MOV_CH_LAYOUT_MPEG_5_0_A            = (117 << 16) | 5,
00070     MOV_CH_LAYOUT_MPEG_5_0_B            = (118 << 16) | 5,
00071     MOV_CH_LAYOUT_MPEG_5_0_C            = (119 << 16) | 5,
00072     MOV_CH_LAYOUT_MPEG_5_0_D            = (120 << 16) | 5,
00073     MOV_CH_LAYOUT_MPEG_5_1_A            = (121 << 16) | 6,
00074     MOV_CH_LAYOUT_MPEG_5_1_B            = (122 << 16) | 6,
00075     MOV_CH_LAYOUT_MPEG_5_1_C            = (123 << 16) | 6,
00076     MOV_CH_LAYOUT_MPEG_5_1_D            = (124 << 16) | 6,
00077     MOV_CH_LAYOUT_MPEG_6_1_A            = (125 << 16) | 7,
00078     MOV_CH_LAYOUT_MPEG_7_1_A            = (126 << 16) | 8,
00079     MOV_CH_LAYOUT_MPEG_7_1_B            = (127 << 16) | 8,
00080     MOV_CH_LAYOUT_MPEG_7_1_C            = (128 << 16) | 8,
00081     MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1    = (129 << 16) | 8,
00082     MOV_CH_LAYOUT_SMPTE_DTV             = (130 << 16) | 8,
00083     MOV_CH_LAYOUT_ITU_2_1               = (131 << 16) | 3,
00084     MOV_CH_LAYOUT_ITU_2_2               = (132 << 16) | 4,
00085     MOV_CH_LAYOUT_DVD_4                 = (133 << 16) | 3,
00086     MOV_CH_LAYOUT_DVD_5                 = (134 << 16) | 4,
00087     MOV_CH_LAYOUT_DVD_6                 = (135 << 16) | 5,
00088     MOV_CH_LAYOUT_DVD_10                = (136 << 16) | 4,
00089     MOV_CH_LAYOUT_DVD_11                = (137 << 16) | 5,
00090     MOV_CH_LAYOUT_DVD_18                = (138 << 16) | 5,
00091     MOV_CH_LAYOUT_AUDIOUNIT_6_0         = (139 << 16) | 6,
00092     MOV_CH_LAYOUT_AUDIOUNIT_7_0         = (140 << 16) | 7,
00093     MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT   = (148 << 16) | 7,
00094     MOV_CH_LAYOUT_AAC_6_0               = (141 << 16) | 6,
00095     MOV_CH_LAYOUT_AAC_6_1               = (142 << 16) | 7,
00096     MOV_CH_LAYOUT_AAC_7_0               = (143 << 16) | 7,
00097     MOV_CH_LAYOUT_AAC_OCTAGONAL         = (144 << 16) | 8,
00098     MOV_CH_LAYOUT_TMH_10_2_STD          = (145 << 16) | 16,
00099     MOV_CH_LAYOUT_TMH_10_2_FULL         = (146 << 16) | 21,
00100     MOV_CH_LAYOUT_AC3_1_0_1             = (149 << 16) | 2,
00101     MOV_CH_LAYOUT_AC3_3_0               = (150 << 16) | 3,
00102     MOV_CH_LAYOUT_AC3_3_1               = (151 << 16) | 4,
00103     MOV_CH_LAYOUT_AC3_3_0_1             = (152 << 16) | 4,
00104     MOV_CH_LAYOUT_AC3_2_1_1             = (153 << 16) | 4,
00105     MOV_CH_LAYOUT_AC3_3_1_1             = (154 << 16) | 5,
00106     MOV_CH_LAYOUT_EAC3_6_0_A            = (155 << 16) | 6,
00107     MOV_CH_LAYOUT_EAC3_7_0_A            = (156 << 16) | 7,
00108     MOV_CH_LAYOUT_EAC3_6_1_A            = (157 << 16) | 7,
00109     MOV_CH_LAYOUT_EAC3_6_1_B            = (158 << 16) | 7,
00110     MOV_CH_LAYOUT_EAC3_6_1_C            = (159 << 16) | 7,
00111     MOV_CH_LAYOUT_EAC3_7_1_A            = (160 << 16) | 8,
00112     MOV_CH_LAYOUT_EAC3_7_1_B            = (161 << 16) | 8,
00113     MOV_CH_LAYOUT_EAC3_7_1_C            = (162 << 16) | 8,
00114     MOV_CH_LAYOUT_EAC3_7_1_D            = (163 << 16) | 8,
00115     MOV_CH_LAYOUT_EAC3_7_1_E            = (164 << 16) | 8,
00116     MOV_CH_LAYOUT_EAC3_7_1_F            = (165 << 16) | 8,
00117     MOV_CH_LAYOUT_EAC3_7_1_G            = (166 << 16) | 8,
00118     MOV_CH_LAYOUT_EAC3_7_1_H            = (167 << 16) | 8,
00119     MOV_CH_LAYOUT_DTS_3_1               = (168 << 16) | 4,
00120     MOV_CH_LAYOUT_DTS_4_1               = (169 << 16) | 5,
00121     MOV_CH_LAYOUT_DTS_6_0_A             = (170 << 16) | 6,
00122     MOV_CH_LAYOUT_DTS_6_0_B             = (171 << 16) | 6,
00123     MOV_CH_LAYOUT_DTS_6_0_C             = (172 << 16) | 6,
00124     MOV_CH_LAYOUT_DTS_6_1_A             = (173 << 16) | 7,
00125     MOV_CH_LAYOUT_DTS_6_1_B             = (174 << 16) | 7,
00126     MOV_CH_LAYOUT_DTS_6_1_C             = (175 << 16) | 7,
00127     MOV_CH_LAYOUT_DTS_6_1_D             = (182 << 16) | 7,
00128     MOV_CH_LAYOUT_DTS_7_0               = (176 << 16) | 7,
00129     MOV_CH_LAYOUT_DTS_7_1               = (177 << 16) | 8,
00130     MOV_CH_LAYOUT_DTS_8_0_A             = (178 << 16) | 8,
00131     MOV_CH_LAYOUT_DTS_8_0_B             = (179 << 16) | 8,
00132     MOV_CH_LAYOUT_DTS_8_1_A             = (180 << 16) | 9,
00133     MOV_CH_LAYOUT_DTS_8_1_B             = (181 << 16) | 9,
00134 };
00135 
00136 struct MovChannelLayoutMap {
00137     uint32_t tag;
00138     uint64_t layout;
00139 };
00140 
00141 static const struct MovChannelLayoutMap mov_ch_layout_map_misc[] = {
00142     { MOV_CH_LAYOUT_USE_DESCRIPTIONS,   0 },
00143     { MOV_CH_LAYOUT_USE_BITMAP,         0 },
00144     { MOV_CH_LAYOUT_DISCRETEINORDER,    0 },
00145     { MOV_CH_LAYOUT_UNKNOWN,            0 },
00146     { MOV_CH_LAYOUT_TMH_10_2_STD,       0 }, // L,   R,  C,    Vhc, Lsd, Rsd,
00147                                              // Ls,  Rs, Vhl,  Vhr, Lw,  Rw,
00148                                              // Csd, Cs, LFE1, LFE2
00149     { MOV_CH_LAYOUT_TMH_10_2_FULL,      0 }, // L,   R,  C,    Vhc,  Lsd, Rsd,
00150                                              // Ls,  Rs, Vhl,  Vhr,  Lw,  Rw,
00151                                              // Csd, Cs, LFE1, LFE2, Lc,  Rc,
00152                                              // HI,  VI, Haptic
00153     { 0, 0 },
00154 };
00155 
00156 static const struct MovChannelLayoutMap mov_ch_layout_map_1ch[] = {
00157     { MOV_CH_LAYOUT_MONO,               AV_CH_LAYOUT_MONO }, // C
00158     { 0, 0 },
00159 };
00160 
00161 static const struct MovChannelLayoutMap mov_ch_layout_map_2ch[] = {
00162     { MOV_CH_LAYOUT_STEREO,             AV_CH_LAYOUT_STEREO         }, // L, R
00163     { MOV_CH_LAYOUT_STEREOHEADPHONES,   AV_CH_LAYOUT_STEREO         }, // L, R
00164     { MOV_CH_LAYOUT_BINAURAL,           AV_CH_LAYOUT_STEREO         }, // L, R
00165     { MOV_CH_LAYOUT_MIDSIDE,            AV_CH_LAYOUT_STEREO         }, // C, sides
00166     { MOV_CH_LAYOUT_XY,                 AV_CH_LAYOUT_STEREO         }, // X (left), Y (right)
00167 
00168     { MOV_CH_LAYOUT_MATRIXSTEREO,       AV_CH_LAYOUT_STEREO_DOWNMIX }, // Lt, Rt
00169 
00170     { MOV_CH_LAYOUT_AC3_1_0_1,          AV_CH_LAYOUT_MONO |            // C, LFE
00171                                         AV_CH_LOW_FREQUENCY         },
00172     { 0, 0 },
00173 };
00174 
00175 static const struct MovChannelLayoutMap mov_ch_layout_map_3ch[] = {
00176     { MOV_CH_LAYOUT_MPEG_3_0_A,         AV_CH_LAYOUT_SURROUND }, // L, R, C
00177     { MOV_CH_LAYOUT_MPEG_3_0_B,         AV_CH_LAYOUT_SURROUND }, // C, L, R
00178     { MOV_CH_LAYOUT_AC3_3_0,            AV_CH_LAYOUT_SURROUND }, // L, C, R
00179 
00180     { MOV_CH_LAYOUT_ITU_2_1,            AV_CH_LAYOUT_2_1      }, // L, R, Cs
00181 
00182     { MOV_CH_LAYOUT_DVD_4,              AV_CH_LAYOUT_2POINT1  }, // L, R, LFE
00183     { 0, 0 },
00184 };
00185 
00186 static const struct MovChannelLayoutMap mov_ch_layout_map_4ch[] = {
00187     { MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, 0 },                    // W, X, Y, Z
00188 
00189     { MOV_CH_LAYOUT_QUADRAPHONIC,       AV_CH_LAYOUT_QUAD    }, // L, R, Rls, Rrs
00190 
00191     { MOV_CH_LAYOUT_MPEG_4_0_A,         AV_CH_LAYOUT_4POINT0 }, // L, R, C, Cs
00192     { MOV_CH_LAYOUT_MPEG_4_0_B,         AV_CH_LAYOUT_4POINT0 }, // C, L, R, Cs
00193     { MOV_CH_LAYOUT_AC3_3_1,            AV_CH_LAYOUT_4POINT0 }, // L, C, R, Cs
00194 
00195     { MOV_CH_LAYOUT_ITU_2_2,            AV_CH_LAYOUT_2_2     }, // L, R, Ls, Rs
00196 
00197     { MOV_CH_LAYOUT_DVD_5,              AV_CH_LAYOUT_2_1 |      // L, R, LFE, Cs
00198                                         AV_CH_LOW_FREQUENCY  },
00199     { MOV_CH_LAYOUT_AC3_2_1_1,          AV_CH_LAYOUT_2_1 |      // L, R, Cs, LFE
00200                                         AV_CH_LOW_FREQUENCY  },
00201 
00202     { MOV_CH_LAYOUT_DVD_10,             AV_CH_LAYOUT_3POINT1 }, // L, R, C, LFE
00203     { MOV_CH_LAYOUT_AC3_3_0_1,          AV_CH_LAYOUT_3POINT1 }, // L, C, R, LFE
00204     { MOV_CH_LAYOUT_DTS_3_1,            AV_CH_LAYOUT_3POINT1 }, // C, L, R, LFE
00205     { 0, 0 },
00206 };
00207 
00208 static const struct MovChannelLayoutMap mov_ch_layout_map_5ch[] = {
00209     { MOV_CH_LAYOUT_PENTAGONAL,         AV_CH_LAYOUT_5POINT0_BACK }, // L, R, Rls, Rrs, C
00210 
00211     { MOV_CH_LAYOUT_MPEG_5_0_A,         AV_CH_LAYOUT_5POINT0 },      // L, R, C,  Ls, Rs
00212     { MOV_CH_LAYOUT_MPEG_5_0_B,         AV_CH_LAYOUT_5POINT0 },      // L, R, Ls, Rs, C
00213     { MOV_CH_LAYOUT_MPEG_5_0_C,         AV_CH_LAYOUT_5POINT0 },      // L, C, R,  Ls, Rs
00214     { MOV_CH_LAYOUT_MPEG_5_0_D,         AV_CH_LAYOUT_5POINT0 },      // C, L, R,  Ls, Rs
00215 
00216     { MOV_CH_LAYOUT_DVD_6,              AV_CH_LAYOUT_2_2 |           // L, R, LFE, Ls, Rs
00217                                         AV_CH_LOW_FREQUENCY },
00218     { MOV_CH_LAYOUT_DVD_18,             AV_CH_LAYOUT_2_2 |           // L, R, Ls, Rs, LFE
00219                                         AV_CH_LOW_FREQUENCY },
00220 
00221     { MOV_CH_LAYOUT_DVD_11,             AV_CH_LAYOUT_4POINT1 },      // L, R, C, LFE, Cs
00222     { MOV_CH_LAYOUT_AC3_3_1_1,          AV_CH_LAYOUT_4POINT1 },      // L, C, R, Cs,  LFE
00223     { MOV_CH_LAYOUT_DTS_4_1,            AV_CH_LAYOUT_4POINT1 },      // C, L, R, Cs,  LFE
00224     { 0, 0 },
00225 };
00226 
00227 static const struct MovChannelLayoutMap mov_ch_layout_map_6ch[] = {
00228     { MOV_CH_LAYOUT_HEXAGONAL,          AV_CH_LAYOUT_HEXAGONAL },      // L, R,  Rls, Rrs, C,   Cs
00229     { MOV_CH_LAYOUT_DTS_6_0_C,          AV_CH_LAYOUT_HEXAGONAL },      // C, Cs, L,   R,   Rls, Rrs
00230 
00231     { MOV_CH_LAYOUT_MPEG_5_1_A,         AV_CH_LAYOUT_5POINT1 },        // L, R, C,  LFE, Ls, Rs
00232     { MOV_CH_LAYOUT_MPEG_5_1_B,         AV_CH_LAYOUT_5POINT1 },        // L, R, Ls, Rs,  C,  LFE
00233     { MOV_CH_LAYOUT_MPEG_5_1_C,         AV_CH_LAYOUT_5POINT1 },        // L, C, R,  Ls,  Rs, LFE
00234     { MOV_CH_LAYOUT_MPEG_5_1_D,         AV_CH_LAYOUT_5POINT1 },        // C, L, R,  Ls,  Rs, LFE
00235 
00236     { MOV_CH_LAYOUT_AUDIOUNIT_6_0,      AV_CH_LAYOUT_6POINT0 },        // L, R, Ls, Rs, C,  Cs
00237     { MOV_CH_LAYOUT_AAC_6_0,            AV_CH_LAYOUT_6POINT0 },        // C, L, R,  Ls, Rs, Cs
00238     { MOV_CH_LAYOUT_EAC3_6_0_A,         AV_CH_LAYOUT_6POINT0 },        // L, C, R,  Ls, Rs, Cs
00239 
00240     { MOV_CH_LAYOUT_DTS_6_0_A,          AV_CH_LAYOUT_6POINT0_FRONT },  // Lc, Rc, L, R, Ls, Rs
00241 
00242     { MOV_CH_LAYOUT_DTS_6_0_B,          AV_CH_LAYOUT_5POINT0_BACK |    // C, L, R, Rls, Rrs, Ts
00243                                         AV_CH_TOP_CENTER },
00244     { 0, 0 },
00245 };
00246 
00247 static const struct MovChannelLayoutMap mov_ch_layout_map_7ch[] = {
00248     { MOV_CH_LAYOUT_MPEG_6_1_A,          AV_CH_LAYOUT_6POINT1 },        // L, R, C, LFE, Ls, Rs,  Cs
00249     { MOV_CH_LAYOUT_AAC_6_1,             AV_CH_LAYOUT_6POINT1 },        // C, L, R, Ls,  Rs, Cs,  LFE
00250     { MOV_CH_LAYOUT_EAC3_6_1_A,          AV_CH_LAYOUT_6POINT1 },        // L, C, R, Ls,  Rs, LFE, Cs
00251     { MOV_CH_LAYOUT_DTS_6_1_D,           AV_CH_LAYOUT_6POINT1 },        // C, L, R, Ls,  Rs, LFE, Cs
00252 
00253     { MOV_CH_LAYOUT_AUDIOUNIT_7_0,       AV_CH_LAYOUT_7POINT0 },        // L, R, Ls, Rs, C,  Rls, Rrs
00254     { MOV_CH_LAYOUT_AAC_7_0,             AV_CH_LAYOUT_7POINT0 },        // C, L, R,  Ls, Rs, Rls, Rrs
00255     { MOV_CH_LAYOUT_EAC3_7_0_A,          AV_CH_LAYOUT_7POINT0 },        // L, C, R,  Ls, Rs, Rls, Rrs
00256 
00257     { MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, AV_CH_LAYOUT_7POINT0_FRONT },  // L,  R, Ls, Rs, C, Lc, Rc
00258     { MOV_CH_LAYOUT_DTS_7_0,             AV_CH_LAYOUT_7POINT0_FRONT },  // Lc, C, Rc, L,  R, Ls, Rs
00259 
00260     { MOV_CH_LAYOUT_EAC3_6_1_B,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Ts
00261                                          AV_CH_TOP_CENTER },
00262 
00263     { MOV_CH_LAYOUT_EAC3_6_1_C,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Vhc
00264                                          AV_CH_TOP_FRONT_CENTER },
00265 
00266     { MOV_CH_LAYOUT_DTS_6_1_A,           AV_CH_LAYOUT_6POINT1_FRONT },  // Lc, Rc, L, R, Ls, Rs, LFE
00267 
00268     { MOV_CH_LAYOUT_DTS_6_1_B,           AV_CH_LAYOUT_5POINT1_BACK |    // C, L, R, Rls, Rrs, Ts, LFE
00269                                          AV_CH_TOP_CENTER },
00270 
00271     { MOV_CH_LAYOUT_DTS_6_1_C,           AV_CH_LAYOUT_6POINT1_BACK },   // C, Cs, L, R, Rls, Rrs, LFE
00272     { 0, 0 },
00273 };
00274 
00275 static const struct MovChannelLayoutMap mov_ch_layout_map_8ch[] = {
00276     { MOV_CH_LAYOUT_OCTAGONAL,           AV_CH_LAYOUT_OCTAGONAL },      // L, R, Rls, Rrs, C,  Cs,  Ls,  Rs
00277     { MOV_CH_LAYOUT_AAC_OCTAGONAL,       AV_CH_LAYOUT_OCTAGONAL },      // C, L, R,   Ls,  Rs, Rls, Rrs, Cs
00278 
00279     { MOV_CH_LAYOUT_CUBE,                AV_CH_LAYOUT_QUAD     |        // L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt
00280                                          AV_CH_TOP_FRONT_LEFT  |
00281                                          AV_CH_TOP_FRONT_RIGHT |
00282                                          AV_CH_TOP_BACK_LEFT   |
00283                                          AV_CH_TOP_BACK_RIGHT },
00284 
00285     { MOV_CH_LAYOUT_MPEG_7_1_A,          AV_CH_LAYOUT_7POINT1_WIDE },   // L,  R,  C,  LFE, Ls, Rs,  Lc, Rc
00286     { MOV_CH_LAYOUT_MPEG_7_1_B,          AV_CH_LAYOUT_7POINT1_WIDE },   // C,  Lc, Rc, L,   R,  Ls,  Rs, LFE
00287     { MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1,  AV_CH_LAYOUT_7POINT1_WIDE },   // L,  R,  Ls, Rs,  C,  LFE, Lc, Rc
00288     { MOV_CH_LAYOUT_EAC3_7_1_B,          AV_CH_LAYOUT_7POINT1_WIDE },   // L,  C,  R,  Ls,  Rs, LFE, Lc, Rc
00289     { MOV_CH_LAYOUT_DTS_7_1,             AV_CH_LAYOUT_7POINT1_WIDE },   // Lc, C,  Rc, L,   R,  Ls,  Rs, LFE
00290 
00291     { MOV_CH_LAYOUT_MPEG_7_1_C,          AV_CH_LAYOUT_7POINT1 },        // L, R, C, LFE, Ls, Rs,  Rls, Rrs
00292     { MOV_CH_LAYOUT_EAC3_7_1_A,          AV_CH_LAYOUT_7POINT1 },        // L, C, R, Ls,  Rs, LFE, Rls, Rrs
00293 
00294     { MOV_CH_LAYOUT_SMPTE_DTV,           AV_CH_LAYOUT_5POINT1 |         // L, R, C, LFE, Ls, Rs, Lt, Rt
00295                                          AV_CH_LAYOUT_STEREO_DOWNMIX },
00296 
00297     { MOV_CH_LAYOUT_EAC3_7_1_C,          AV_CH_LAYOUT_5POINT1        |  // L, C, R, Ls, Rs, LFE, Lsd, Rsd
00298                                          AV_CH_SURROUND_DIRECT_LEFT  |
00299                                          AV_CH_SURROUND_DIRECT_RIGHT },
00300 
00301     { MOV_CH_LAYOUT_EAC3_7_1_D,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Lw, Rw
00302                                          AV_CH_WIDE_LEFT      |
00303                                          AV_CH_WIDE_RIGHT },
00304 
00305     { MOV_CH_LAYOUT_EAC3_7_1_E,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Vhl, Vhr
00306                                          AV_CH_TOP_FRONT_LEFT |
00307                                          AV_CH_TOP_FRONT_RIGHT },
00308 
00309     { MOV_CH_LAYOUT_EAC3_7_1_F,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Cs, Ts
00310                                          AV_CH_BACK_CENTER    |
00311                                          AV_CH_TOP_CENTER },
00312 
00313     { MOV_CH_LAYOUT_EAC3_7_1_G,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Cs, Vhc
00314                                          AV_CH_BACK_CENTER    |
00315                                          AV_CH_TOP_FRONT_CENTER },
00316 
00317     { MOV_CH_LAYOUT_EAC3_7_1_H,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Ts, Vhc
00318                                          AV_CH_TOP_CENTER     |
00319                                          AV_CH_TOP_FRONT_CENTER },
00320 
00321     { MOV_CH_LAYOUT_DTS_8_0_A,           AV_CH_LAYOUT_2_2           |   // Lc, Rc, L, R, Ls, Rs, Rls, Rrs
00322                                          AV_CH_BACK_LEFT            |
00323                                          AV_CH_BACK_RIGHT           |
00324                                          AV_CH_FRONT_LEFT_OF_CENTER |
00325                                          AV_CH_FRONT_RIGHT_OF_CENTER },
00326 
00327     { MOV_CH_LAYOUT_DTS_8_0_B,           AV_CH_LAYOUT_5POINT0        |  // Lc, C, Rc, L, R, Ls, Cs, Rs
00328                                          AV_CH_FRONT_LEFT_OF_CENTER  |
00329                                          AV_CH_FRONT_RIGHT_OF_CENTER |
00330                                          AV_CH_BACK_CENTER },
00331     { 0, 0 },
00332 };
00333 
00334 static const struct MovChannelLayoutMap mov_ch_layout_map_9ch[] = {
00335     { MOV_CH_LAYOUT_DTS_8_1_A,           AV_CH_LAYOUT_2_2            | // Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE
00336                                          AV_CH_BACK_LEFT             |
00337                                          AV_CH_BACK_RIGHT            |
00338                                          AV_CH_FRONT_LEFT_OF_CENTER  |
00339                                          AV_CH_FRONT_RIGHT_OF_CENTER |
00340                                          AV_CH_LOW_FREQUENCY },
00341 
00342     { MOV_CH_LAYOUT_DTS_8_1_B,           AV_CH_LAYOUT_7POINT1_WIDE   | // Lc, C, Rc, L, R, Ls, Cs, Rs, LFE
00343                                          AV_CH_BACK_CENTER },
00344     { 0, 0 },
00345 };
00346 
00347 static const struct MovChannelLayoutMap *mov_ch_layout_map[] = {
00348     mov_ch_layout_map_misc,
00349     mov_ch_layout_map_1ch,
00350     mov_ch_layout_map_2ch,
00351     mov_ch_layout_map_3ch,
00352     mov_ch_layout_map_4ch,
00353     mov_ch_layout_map_5ch,
00354     mov_ch_layout_map_6ch,
00355     mov_ch_layout_map_7ch,
00356     mov_ch_layout_map_8ch,
00357     mov_ch_layout_map_9ch,
00358 };
00359 
00360 static const enum MovChannelLayoutTag mov_ch_layouts_aac[] = {
00361     MOV_CH_LAYOUT_MONO,
00362     MOV_CH_LAYOUT_STEREO,
00363     MOV_CH_LAYOUT_AC3_1_0_1,
00364     MOV_CH_LAYOUT_MPEG_3_0_B,
00365     MOV_CH_LAYOUT_ITU_2_1,
00366     MOV_CH_LAYOUT_DVD_4,
00367     MOV_CH_LAYOUT_QUADRAPHONIC,
00368     MOV_CH_LAYOUT_MPEG_4_0_B,
00369     MOV_CH_LAYOUT_ITU_2_2,
00370     MOV_CH_LAYOUT_AC3_2_1_1,
00371     MOV_CH_LAYOUT_DTS_3_1,
00372     MOV_CH_LAYOUT_MPEG_5_0_D,
00373     MOV_CH_LAYOUT_DVD_18,
00374     MOV_CH_LAYOUT_DTS_4_1,
00375     MOV_CH_LAYOUT_MPEG_5_1_D,
00376     MOV_CH_LAYOUT_AAC_6_0,
00377     MOV_CH_LAYOUT_DTS_6_0_A,
00378     MOV_CH_LAYOUT_AAC_6_1,
00379     MOV_CH_LAYOUT_AAC_7_0,
00380     MOV_CH_LAYOUT_DTS_6_1_A,
00381     MOV_CH_LAYOUT_AAC_OCTAGONAL,
00382     MOV_CH_LAYOUT_MPEG_7_1_B,
00383     MOV_CH_LAYOUT_DTS_8_0_A,
00384     0,
00385 };
00386 
00387 static const enum MovChannelLayoutTag mov_ch_layouts_ac3[] = {
00388     MOV_CH_LAYOUT_MONO,
00389     MOV_CH_LAYOUT_STEREO,
00390     MOV_CH_LAYOUT_AC3_1_0_1,
00391     MOV_CH_LAYOUT_AC3_3_0,
00392     MOV_CH_LAYOUT_ITU_2_1,
00393     MOV_CH_LAYOUT_DVD_4,
00394     MOV_CH_LAYOUT_AC3_3_1,
00395     MOV_CH_LAYOUT_ITU_2_2,
00396     MOV_CH_LAYOUT_AC3_2_1_1,
00397     MOV_CH_LAYOUT_AC3_3_0_1,
00398     MOV_CH_LAYOUT_MPEG_5_0_C,
00399     MOV_CH_LAYOUT_DVD_18,
00400     MOV_CH_LAYOUT_AC3_3_1_1,
00401     MOV_CH_LAYOUT_MPEG_5_1_C,
00402     0,
00403 };
00404 
00405 static const enum MovChannelLayoutTag mov_ch_layouts_alac[] = {
00406     MOV_CH_LAYOUT_MONO,
00407     MOV_CH_LAYOUT_STEREO,
00408     MOV_CH_LAYOUT_MPEG_3_0_B,
00409     MOV_CH_LAYOUT_MPEG_4_0_B,
00410     MOV_CH_LAYOUT_MPEG_5_0_D,
00411     MOV_CH_LAYOUT_MPEG_5_1_D,
00412     MOV_CH_LAYOUT_AAC_6_1,
00413     MOV_CH_LAYOUT_MPEG_7_1_B,
00414     0,
00415 };
00416 
00417 static const struct {
00418     enum CodecID codec_id;
00419     const enum MovChannelLayoutTag *layouts;
00420 } mov_codec_ch_layouts[] = {
00421     { CODEC_ID_AAC,     mov_ch_layouts_aac      },
00422     { CODEC_ID_AC3,     mov_ch_layouts_ac3      },
00423     { CODEC_ID_ALAC,    mov_ch_layouts_alac     },
00424     { CODEC_ID_NONE,    NULL                    },
00425 };
00426 
00427 uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap)
00428 {
00429     int i, channels;
00430     const struct MovChannelLayoutMap *layout_map;
00431 
00432     /* use ff_mov_get_channel_label() to build a layout instead */
00433     if (tag == MOV_CH_LAYOUT_USE_DESCRIPTIONS)
00434         return 0;
00435 
00436     /* handle the use of the channel bitmap */
00437     if (tag == MOV_CH_LAYOUT_USE_BITMAP)
00438         return bitmap < 0x40000 ? bitmap : 0;
00439 
00440     /* get the layout map based on the channel count for the specified layout tag */
00441     channels = tag & 0xFFFF;
00442     if (channels > 9)
00443         channels = 0;
00444     layout_map = mov_ch_layout_map[channels];
00445 
00446     /* find the channel layout for the specified layout tag */
00447     for (i = 0; layout_map[i].tag != 0; i++) {
00448         if (layout_map[i].tag == tag)
00449             break;
00450     }
00451     return layout_map[i].layout;
00452 }
00453 
00454 uint32_t ff_mov_get_channel_label(uint32_t label)
00455 {
00456     if (label == 0)
00457         return 0;
00458     if (label <= 18)
00459         return 1U << (label - 1);
00460     if (label == 38)
00461         return AV_CH_STEREO_LEFT;
00462     if (label == 39)
00463         return AV_CH_STEREO_RIGHT;
00464     return 0;
00465 }
00466 
00467 uint32_t ff_mov_get_channel_layout_tag(enum CodecID codec_id,
00468                                        uint64_t channel_layout,
00469                                        uint32_t *bitmap)
00470 {
00471     int i, j;
00472     uint32_t tag = 0;
00473     const enum MovChannelLayoutTag *layouts = NULL;
00474 
00475     /* find the layout list for the specified codec */
00476     for (i = 0; mov_codec_ch_layouts[i].codec_id != CODEC_ID_NONE; i++) {
00477         if (mov_codec_ch_layouts[i].codec_id == codec_id)
00478             break;
00479     }
00480     if (mov_codec_ch_layouts[i].codec_id != CODEC_ID_NONE)
00481         layouts = mov_codec_ch_layouts[i].layouts;
00482 
00483     if (layouts) {
00484         int channels;
00485         const struct MovChannelLayoutMap *layout_map;
00486 
00487         /* get the layout map based on the channel count */
00488         channels = av_get_channel_layout_nb_channels(channel_layout);
00489         if (channels > 9)
00490             channels = 0;
00491         layout_map = mov_ch_layout_map[channels];
00492 
00493         /* find the layout tag for the specified channel layout */
00494         for (i = 0; layouts[i] != 0; i++) {
00495             if (layouts[i] & 0xFFFF != channels)
00496                 continue;
00497             for (j = 0; layout_map[j].tag != 0; j++) {
00498                 if (layout_map[j].tag    == layouts[i] &&
00499                     layout_map[j].layout == channel_layout)
00500                     break;
00501             }
00502             if (layout_map[j].tag)
00503                 break;
00504         }
00505         tag = layouts[i];
00506     }
00507 
00508     /* if no tag was found, use channel bitmap as a backup if possible */
00509     if (tag == 0 && channel_layout > 0 && channel_layout < 0x40000) {
00510         tag     = MOV_CH_LAYOUT_USE_BITMAP;
00511         *bitmap = (uint32_t)channel_layout;
00512     } else
00513         *bitmap = 0;
00514 
00515     /* TODO: set channel descriptions as a secondary backup */
00516 
00517     return tag;
00518 }