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 };
00159 
00160 static const struct MovChannelLayoutMap mov_ch_layout_map_2ch[] = {
00161     { MOV_CH_LAYOUT_STEREO,             AV_CH_LAYOUT_STEREO         }, // L, R
00162     { MOV_CH_LAYOUT_STEREOHEADPHONES,   AV_CH_LAYOUT_STEREO         }, // L, R
00163     { MOV_CH_LAYOUT_BINAURAL,           AV_CH_LAYOUT_STEREO         }, // L, R
00164     { MOV_CH_LAYOUT_MIDSIDE,            AV_CH_LAYOUT_STEREO         }, // C, sides
00165     { MOV_CH_LAYOUT_XY,                 AV_CH_LAYOUT_STEREO         }, // X (left), Y (right)
00166 
00167     { MOV_CH_LAYOUT_MATRIXSTEREO,       AV_CH_LAYOUT_STEREO_DOWNMIX }, // Lt, Rt
00168 
00169     { MOV_CH_LAYOUT_AC3_1_0_1,          AV_CH_LAYOUT_MONO |            // C, LFE
00170                                         AV_CH_LOW_FREQUENCY         },
00171     { 0, 0 },
00172 };
00173 
00174 static const struct MovChannelLayoutMap mov_ch_layout_map_3ch[] = {
00175     { MOV_CH_LAYOUT_MPEG_3_0_A,         AV_CH_LAYOUT_SURROUND }, // L, R, C
00176     { MOV_CH_LAYOUT_MPEG_3_0_B,         AV_CH_LAYOUT_SURROUND }, // C, L, R
00177     { MOV_CH_LAYOUT_AC3_3_0,            AV_CH_LAYOUT_SURROUND }, // L, C, R
00178 
00179     { MOV_CH_LAYOUT_ITU_2_1,            AV_CH_LAYOUT_2_1      }, // L, R, Cs
00180 
00181     { MOV_CH_LAYOUT_DVD_4,              AV_CH_LAYOUT_2POINT1  }, // L, R, LFE
00182     { 0, 0 },
00183 };
00184 
00185 static const struct MovChannelLayoutMap mov_ch_layout_map_4ch[] = {
00186     { MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, 0 },                    // W, X, Y, Z
00187 
00188     { MOV_CH_LAYOUT_QUADRAPHONIC,       AV_CH_LAYOUT_QUAD    }, // L, R, Rls, Rrs
00189 
00190     { MOV_CH_LAYOUT_MPEG_4_0_A,         AV_CH_LAYOUT_4POINT0 }, // L, R, C, Cs
00191     { MOV_CH_LAYOUT_MPEG_4_0_B,         AV_CH_LAYOUT_4POINT0 }, // C, L, R, Cs
00192     { MOV_CH_LAYOUT_AC3_3_1,            AV_CH_LAYOUT_4POINT0 }, // L, C, R, Cs
00193 
00194     { MOV_CH_LAYOUT_ITU_2_2,            AV_CH_LAYOUT_2_2     }, // L, R, Ls, Rs
00195 
00196     { MOV_CH_LAYOUT_DVD_5,              AV_CH_LAYOUT_2_1 |      // L, R, LFE, Cs
00197                                         AV_CH_LOW_FREQUENCY  },
00198     { MOV_CH_LAYOUT_AC3_2_1_1,          AV_CH_LAYOUT_2_1 |      // L, R, Cs, LFE
00199                                         AV_CH_LOW_FREQUENCY  },
00200 
00201     { MOV_CH_LAYOUT_DVD_10,             AV_CH_LAYOUT_3POINT1 }, // L, R, C, LFE
00202     { MOV_CH_LAYOUT_AC3_3_0_1,          AV_CH_LAYOUT_3POINT1 }, // L, C, R, LFE
00203     { MOV_CH_LAYOUT_DTS_3_1,            AV_CH_LAYOUT_3POINT1 }, // C, L, R, LFE
00204     { 0, 0 },
00205 };
00206 
00207 static const struct MovChannelLayoutMap mov_ch_layout_map_5ch[] = {
00208     { MOV_CH_LAYOUT_PENTAGONAL,         AV_CH_LAYOUT_5POINT0_BACK }, // L, R, Rls, Rrs, C
00209 
00210     { MOV_CH_LAYOUT_MPEG_5_0_A,         AV_CH_LAYOUT_5POINT0 },      // L, R, C,  Ls, Rs
00211     { MOV_CH_LAYOUT_MPEG_5_0_B,         AV_CH_LAYOUT_5POINT0 },      // L, R, Ls, Rs, C
00212     { MOV_CH_LAYOUT_MPEG_5_0_C,         AV_CH_LAYOUT_5POINT0 },      // L, C, R,  Ls, Rs
00213     { MOV_CH_LAYOUT_MPEG_5_0_D,         AV_CH_LAYOUT_5POINT0 },      // C, L, R,  Ls, Rs
00214 
00215     { MOV_CH_LAYOUT_DVD_6,              AV_CH_LAYOUT_2_2 |           // L, R, LFE, Ls, Rs
00216                                         AV_CH_LOW_FREQUENCY },
00217     { MOV_CH_LAYOUT_DVD_18,             AV_CH_LAYOUT_2_2 |           // L, R, Ls, Rs, LFE
00218                                         AV_CH_LOW_FREQUENCY },
00219 
00220     { MOV_CH_LAYOUT_DVD_11,             AV_CH_LAYOUT_4POINT1 },      // L, R, C, LFE, Cs
00221     { MOV_CH_LAYOUT_AC3_3_1_1,          AV_CH_LAYOUT_4POINT1 },      // L, C, R, Cs,  LFE
00222     { MOV_CH_LAYOUT_DTS_4_1,            AV_CH_LAYOUT_4POINT1 },      // C, L, R, Cs,  LFE
00223     { 0, 0 },
00224 };
00225 
00226 static const struct MovChannelLayoutMap mov_ch_layout_map_6ch[] = {
00227     { MOV_CH_LAYOUT_HEXAGONAL,          AV_CH_LAYOUT_HEXAGONAL },      // L, R,  Rls, Rrs, C,   Cs
00228     { MOV_CH_LAYOUT_DTS_6_0_C,          AV_CH_LAYOUT_HEXAGONAL },      // C, Cs, L,   R,   Rls, Rrs
00229 
00230     { MOV_CH_LAYOUT_MPEG_5_1_A,         AV_CH_LAYOUT_5POINT1 },        // L, R, C,  LFE, Ls, Rs
00231     { MOV_CH_LAYOUT_MPEG_5_1_B,         AV_CH_LAYOUT_5POINT1 },        // L, R, Ls, Rs,  C,  LFE
00232     { MOV_CH_LAYOUT_MPEG_5_1_C,         AV_CH_LAYOUT_5POINT1 },        // L, C, R,  Ls,  Rs, LFE
00233     { MOV_CH_LAYOUT_MPEG_5_1_D,         AV_CH_LAYOUT_5POINT1 },        // C, L, R,  Ls,  Rs, LFE
00234 
00235     { MOV_CH_LAYOUT_AUDIOUNIT_6_0,      AV_CH_LAYOUT_6POINT0 },        // L, R, Ls, Rs, C,  Cs
00236     { MOV_CH_LAYOUT_AAC_6_0,            AV_CH_LAYOUT_6POINT0 },        // C, L, R,  Ls, Rs, Cs
00237     { MOV_CH_LAYOUT_EAC3_6_0_A,         AV_CH_LAYOUT_6POINT0 },        // L, C, R,  Ls, Rs, Cs
00238 
00239     { MOV_CH_LAYOUT_DTS_6_0_A,          AV_CH_LAYOUT_6POINT0_FRONT },  // Lc, Rc, L, R, Ls, Rs
00240 
00241     { MOV_CH_LAYOUT_DTS_6_0_B,          AV_CH_LAYOUT_5POINT0_BACK |    // C, L, R, Rls, Rrs, Ts
00242                                         AV_CH_TOP_CENTER },
00243     { 0, 0 },
00244 };
00245 
00246 static const struct MovChannelLayoutMap mov_ch_layout_map_7ch[] = {
00247     { MOV_CH_LAYOUT_MPEG_6_1_A,          AV_CH_LAYOUT_6POINT1 },        // L, R, C, LFE, Ls, Rs,  Cs
00248     { MOV_CH_LAYOUT_AAC_6_1,             AV_CH_LAYOUT_6POINT1 },        // C, L, R, Ls,  Rs, Cs,  LFE
00249     { MOV_CH_LAYOUT_EAC3_6_1_A,          AV_CH_LAYOUT_6POINT1 },        // L, C, R, Ls,  Rs, LFE, Cs
00250     { MOV_CH_LAYOUT_DTS_6_1_D,           AV_CH_LAYOUT_6POINT1 },        // C, L, R, Ls,  Rs, LFE, Cs
00251 
00252     { MOV_CH_LAYOUT_AUDIOUNIT_7_0,       AV_CH_LAYOUT_7POINT0 },        // L, R, Ls, Rs, C,  Rls, Rrs
00253     { MOV_CH_LAYOUT_AAC_7_0,             AV_CH_LAYOUT_7POINT0 },        // C, L, R,  Ls, Rs, Rls, Rrs
00254     { MOV_CH_LAYOUT_EAC3_7_0_A,          AV_CH_LAYOUT_7POINT0 },        // L, C, R,  Ls, Rs, Rls, Rrs
00255 
00256     { MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, AV_CH_LAYOUT_7POINT0_FRONT },  // L,  R, Ls, Rs, C, Lc, Rc
00257     { MOV_CH_LAYOUT_DTS_7_0,             AV_CH_LAYOUT_7POINT0_FRONT },  // Lc, C, Rc, L,  R, Ls, Rs
00258 
00259     { MOV_CH_LAYOUT_EAC3_6_1_B,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Ts
00260                                          AV_CH_TOP_CENTER },
00261 
00262     { MOV_CH_LAYOUT_EAC3_6_1_C,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Vhc
00263                                          AV_CH_TOP_FRONT_CENTER },
00264 
00265     { MOV_CH_LAYOUT_DTS_6_1_A,           AV_CH_LAYOUT_6POINT1_FRONT },  // Lc, Rc, L, R, Ls, Rs, LFE
00266 
00267     { MOV_CH_LAYOUT_DTS_6_1_B,           AV_CH_LAYOUT_5POINT1_BACK |    // C, L, R, Rls, Rrs, Ts, LFE
00268                                          AV_CH_TOP_CENTER },
00269 
00270     { MOV_CH_LAYOUT_DTS_6_1_C,           AV_CH_LAYOUT_6POINT1_BACK },   // C, Cs, L, R, Rls, Rrs, LFE
00271     { 0, 0 },
00272 };
00273 
00274 static const struct MovChannelLayoutMap mov_ch_layout_map_8ch[] = {
00275     { MOV_CH_LAYOUT_OCTAGONAL,           AV_CH_LAYOUT_OCTAGONAL },      // L, R, Rls, Rrs, C,  Cs,  Ls,  Rs
00276     { MOV_CH_LAYOUT_AAC_OCTAGONAL,       AV_CH_LAYOUT_OCTAGONAL },      // C, L, R,   Ls,  Rs, Rls, Rrs, Cs
00277 
00278     { MOV_CH_LAYOUT_CUBE,                AV_CH_LAYOUT_QUAD     |        // L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt
00279                                          AV_CH_TOP_FRONT_LEFT  |
00280                                          AV_CH_TOP_FRONT_RIGHT |
00281                                          AV_CH_TOP_BACK_LEFT   |
00282                                          AV_CH_TOP_BACK_RIGHT },
00283 
00284     { MOV_CH_LAYOUT_MPEG_7_1_A,          AV_CH_LAYOUT_7POINT1_WIDE },   // L,  R,  C,  LFE, Ls, Rs,  Lc, Rc
00285     { MOV_CH_LAYOUT_MPEG_7_1_B,          AV_CH_LAYOUT_7POINT1_WIDE },   // C,  Lc, Rc, L,   R,  Ls,  Rs, LFE
00286     { MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1,  AV_CH_LAYOUT_7POINT1_WIDE },   // L,  R,  Ls, Rs,  C,  LFE, Lc, Rc
00287     { MOV_CH_LAYOUT_EAC3_7_1_B,          AV_CH_LAYOUT_7POINT1_WIDE },   // L,  C,  R,  Ls,  Rs, LFE, Lc, Rc
00288     { MOV_CH_LAYOUT_DTS_7_1,             AV_CH_LAYOUT_7POINT1_WIDE },   // Lc, C,  Rc, L,   R,  Ls,  Rs, LFE
00289 
00290     { MOV_CH_LAYOUT_MPEG_7_1_C,          AV_CH_LAYOUT_7POINT1 },        // L, R, C, LFE, Ls, Rs,  Rls, Rrs
00291     { MOV_CH_LAYOUT_EAC3_7_1_A,          AV_CH_LAYOUT_7POINT1 },        // L, C, R, Ls,  Rs, LFE, Rls, Rrs
00292 
00293     { MOV_CH_LAYOUT_SMPTE_DTV,           AV_CH_LAYOUT_5POINT1 |         // L, R, C, LFE, Ls, Rs, Lt, Rt
00294                                          AV_CH_LAYOUT_STEREO_DOWNMIX },
00295 
00296     { MOV_CH_LAYOUT_EAC3_7_1_C,          AV_CH_LAYOUT_5POINT1        |  // L, C, R, Ls, Rs, LFE, Lsd, Rsd
00297                                          AV_CH_SURROUND_DIRECT_LEFT  |
00298                                          AV_CH_SURROUND_DIRECT_RIGHT },
00299 
00300     { MOV_CH_LAYOUT_EAC3_7_1_D,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Lw, Rw
00301                                          AV_CH_WIDE_LEFT      |
00302                                          AV_CH_WIDE_RIGHT },
00303 
00304     { MOV_CH_LAYOUT_EAC3_7_1_E,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Vhl, Vhr
00305                                          AV_CH_TOP_FRONT_LEFT |
00306                                          AV_CH_TOP_FRONT_RIGHT },
00307 
00308     { MOV_CH_LAYOUT_EAC3_7_1_F,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Cs, Ts
00309                                          AV_CH_BACK_CENTER    |
00310                                          AV_CH_TOP_CENTER },
00311 
00312     { MOV_CH_LAYOUT_EAC3_7_1_G,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Cs, Vhc
00313                                          AV_CH_BACK_CENTER    |
00314                                          AV_CH_TOP_FRONT_CENTER },
00315 
00316     { MOV_CH_LAYOUT_EAC3_7_1_H,          AV_CH_LAYOUT_5POINT1 |         // L, C, R, Ls, Rs, LFE, Ts, Vhc
00317                                          AV_CH_TOP_CENTER     |
00318                                          AV_CH_TOP_FRONT_CENTER },
00319 
00320     { MOV_CH_LAYOUT_DTS_8_0_A,           AV_CH_LAYOUT_2_2           |   // Lc, Rc, L, R, Ls, Rs, Rls, Rrs
00321                                          AV_CH_BACK_LEFT            |
00322                                          AV_CH_BACK_RIGHT           |
00323                                          AV_CH_FRONT_LEFT_OF_CENTER |
00324                                          AV_CH_FRONT_RIGHT_OF_CENTER },
00325 
00326     { MOV_CH_LAYOUT_DTS_8_0_B,           AV_CH_LAYOUT_5POINT0        |  // Lc, C, Rc, L, R, Ls, Cs, Rs
00327                                          AV_CH_FRONT_LEFT_OF_CENTER  |
00328                                          AV_CH_FRONT_RIGHT_OF_CENTER |
00329                                          AV_CH_BACK_CENTER },
00330     { 0, 0 },
00331 };
00332 
00333 static const struct MovChannelLayoutMap mov_ch_layout_map_9ch[] = {
00334     { MOV_CH_LAYOUT_DTS_8_1_A,           AV_CH_LAYOUT_2_2            | // Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE
00335                                          AV_CH_BACK_LEFT             |
00336                                          AV_CH_BACK_RIGHT            |
00337                                          AV_CH_FRONT_LEFT_OF_CENTER  |
00338                                          AV_CH_FRONT_RIGHT_OF_CENTER |
00339                                          AV_CH_LOW_FREQUENCY },
00340 
00341     { MOV_CH_LAYOUT_DTS_8_1_B,           AV_CH_LAYOUT_7POINT1_WIDE   | // Lc, C, Rc, L, R, Ls, Cs, Rs, LFE
00342                                          AV_CH_BACK_CENTER },
00343     { 0, 0 },
00344 };
00345 
00346 static const struct MovChannelLayoutMap *mov_ch_layout_map[] = {
00347     mov_ch_layout_map_misc,
00348     mov_ch_layout_map_1ch,
00349     mov_ch_layout_map_2ch,
00350     mov_ch_layout_map_3ch,
00351     mov_ch_layout_map_4ch,
00352     mov_ch_layout_map_5ch,
00353     mov_ch_layout_map_6ch,
00354     mov_ch_layout_map_7ch,
00355     mov_ch_layout_map_8ch,
00356     mov_ch_layout_map_9ch,
00357 };
00358 
00359 static const enum MovChannelLayoutTag mov_ch_layouts_aac[] = {
00360     MOV_CH_LAYOUT_MONO,
00361     MOV_CH_LAYOUT_STEREO,
00362     MOV_CH_LAYOUT_AC3_1_0_1,
00363     MOV_CH_LAYOUT_MPEG_3_0_B,
00364     MOV_CH_LAYOUT_ITU_2_1,
00365     MOV_CH_LAYOUT_DVD_4,
00366     MOV_CH_LAYOUT_QUADRAPHONIC,
00367     MOV_CH_LAYOUT_MPEG_4_0_B,
00368     MOV_CH_LAYOUT_ITU_2_2,
00369     MOV_CH_LAYOUT_AC3_2_1_1,
00370     MOV_CH_LAYOUT_DTS_3_1,
00371     MOV_CH_LAYOUT_MPEG_5_0_D,
00372     MOV_CH_LAYOUT_DVD_18,
00373     MOV_CH_LAYOUT_DTS_4_1,
00374     MOV_CH_LAYOUT_MPEG_5_1_D,
00375     MOV_CH_LAYOUT_AAC_6_0,
00376     MOV_CH_LAYOUT_DTS_6_0_A,
00377     MOV_CH_LAYOUT_AAC_6_1,
00378     MOV_CH_LAYOUT_AAC_7_0,
00379     MOV_CH_LAYOUT_DTS_6_1_A,
00380     MOV_CH_LAYOUT_AAC_OCTAGONAL,
00381     MOV_CH_LAYOUT_MPEG_7_1_B,
00382     MOV_CH_LAYOUT_DTS_8_0_A,
00383     0,
00384 };
00385 
00386 static const enum MovChannelLayoutTag mov_ch_layouts_ac3[] = {
00387     MOV_CH_LAYOUT_MONO,
00388     MOV_CH_LAYOUT_STEREO,
00389     MOV_CH_LAYOUT_AC3_1_0_1,
00390     MOV_CH_LAYOUT_AC3_3_0,
00391     MOV_CH_LAYOUT_ITU_2_1,
00392     MOV_CH_LAYOUT_DVD_4,
00393     MOV_CH_LAYOUT_AC3_3_1,
00394     MOV_CH_LAYOUT_ITU_2_2,
00395     MOV_CH_LAYOUT_AC3_2_1_1,
00396     MOV_CH_LAYOUT_AC3_3_0_1,
00397     MOV_CH_LAYOUT_MPEG_5_0_C,
00398     MOV_CH_LAYOUT_DVD_18,
00399     MOV_CH_LAYOUT_AC3_3_1_1,
00400     MOV_CH_LAYOUT_MPEG_5_1_C,
00401     0,
00402 };
00403 
00404 static const enum MovChannelLayoutTag mov_ch_layouts_alac[] = {
00405     MOV_CH_LAYOUT_MONO,
00406     MOV_CH_LAYOUT_STEREO,
00407     MOV_CH_LAYOUT_MPEG_3_0_B,
00408     MOV_CH_LAYOUT_MPEG_4_0_B,
00409     MOV_CH_LAYOUT_MPEG_5_0_D,
00410     MOV_CH_LAYOUT_MPEG_5_1_D,
00411     MOV_CH_LAYOUT_AAC_6_1,
00412     MOV_CH_LAYOUT_MPEG_7_1_B,
00413     0,
00414 };
00415 
00416 static const struct {
00417     enum CodecID codec_id;
00418     const enum MovChannelLayoutTag *layouts;
00419 } mov_codec_ch_layouts[] = {
00420     { CODEC_ID_AAC,     mov_ch_layouts_aac      },
00421     { CODEC_ID_AC3,     mov_ch_layouts_ac3      },
00422     { CODEC_ID_ALAC,    mov_ch_layouts_alac     },
00423     { CODEC_ID_NONE,    NULL                    },
00424 };
00425 
00426 uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap)
00427 {
00428     int i, channels;
00429     const struct MovChannelLayoutMap *layout_map;
00430 
00431     /* handle the use of the channel descriptions */
00432     /* TODO: map MOV channel labels to FFmpeg channels */
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_layout_tag(enum CodecID codec_id,
00455                                        uint64_t channel_layout,
00456                                        uint32_t *bitmap)
00457 {
00458     int i, j;
00459     uint32_t tag = 0;
00460     const enum MovChannelLayoutTag *layouts = NULL;
00461 
00462     /* find the layout list for the specified codec */
00463     for (i = 0; mov_codec_ch_layouts[i].codec_id != CODEC_ID_NONE; i++) {
00464         if (mov_codec_ch_layouts[i].codec_id == codec_id)
00465             break;
00466     }
00467     if (mov_codec_ch_layouts[i].codec_id != CODEC_ID_NONE)
00468         layouts = mov_codec_ch_layouts[i].layouts;
00469 
00470     if (layouts) {
00471         int channels;
00472         const struct MovChannelLayoutMap *layout_map;
00473 
00474         /* get the layout map based on the channel count */
00475         channels = av_get_channel_layout_nb_channels(channel_layout);
00476         if (channels > 9)
00477             channels = 0;
00478         layout_map = mov_ch_layout_map[channels];
00479 
00480         /* find the layout tag for the specified channel layout */
00481         for (i = 0; layouts[i] != 0; i++) {
00482             if (layouts[i] & 0xFFFF != channels)
00483                 continue;
00484             for (j = 0; layout_map[j].tag != 0; j++) {
00485                 if (layout_map[j].tag    == layouts[i] &&
00486                     layout_map[j].layout == channel_layout)
00487                     break;
00488             }
00489             if (layout_map[j].tag)
00490                 break;
00491         }
00492         tag = layouts[i];
00493     }
00494 
00495     /* if no tag was found, use channel bitmap as a backup if possible */
00496     if (tag == 0 && channel_layout > 0 && channel_layout < 0x40000) {
00497         tag     = MOV_CH_LAYOUT_USE_BITMAP;
00498         *bitmap = (uint32_t)channel_layout;
00499     } else
00500         *bitmap = 0;
00501 
00502     /* TODO: set channel descriptions as a secondary backup */
00503 
00504     return tag;
00505 }