/* * Copyright (c) 2011 Justin Ruggles * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * mov 'chan' tag reading/writing. * @author Justin Ruggles */ #include <stdint.h> #include "libavutil/channel_layout.h" #include "libavcodec/avcodec.h" #include "mov_chan.h" /** * Channel Layout Tag * This tells which channels are present in the audio stream and the order in * which they appear. * * @note We're using the channel layout tag to indicate channel order * when the value is greater than 0x10000. The Apple documentation has * some contradictions as to how this is actually supposed to be handled. * * Core Audio File Format Spec: * "The high 16 bits indicates a specific ordering of the channels." * Core Audio Data Types Reference: * "These identifiers specify the channels included in a layout but * do not specify a particular ordering of those channels." */ enum MovChannelLayoutTag { MOV_CH_LAYOUT_UNKNOWN = 0xFFFF0000, MOV_CH_LAYOUT_USE_DESCRIPTIONS = ( 0 << 16) | 0, MOV_CH_LAYOUT_USE_BITMAP = ( 1 << 16) | 0, MOV_CH_LAYOUT_DISCRETEINORDER = (147 << 16) | 0, MOV_CH_LAYOUT_MONO = (100 << 16) | 1, MOV_CH_LAYOUT_STEREO = (101 << 16) | 2, MOV_CH_LAYOUT_STEREOHEADPHONES = (102 << 16) | 2, MOV_CH_LAYOUT_MATRIXSTEREO = (103 << 16) | 2, MOV_CH_LAYOUT_MIDSIDE = (104 << 16) | 2, MOV_CH_LAYOUT_XY = (105 << 16) | 2, MOV_CH_LAYOUT_BINAURAL = (106 << 16) | 2, MOV_CH_LAYOUT_AMBISONIC_B_FORMAT = (107 << 16) | 4, MOV_CH_LAYOUT_QUADRAPHONIC = (108 << 16) | 4, MOV_CH_LAYOUT_PENTAGONAL = (109 << 16) | 5, MOV_CH_LAYOUT_HEXAGONAL = (110 << 16) | 6, MOV_CH_LAYOUT_OCTAGONAL = (111 << 16) | 8, MOV_CH_LAYOUT_CUBE = (112 << 16) | 8, MOV_CH_LAYOUT_MPEG_3_0_A = (113 << 16) | 3, MOV_CH_LAYOUT_MPEG_3_0_B = (114 << 16) | 3, MOV_CH_LAYOUT_MPEG_4_0_A = (115 << 16) | 4, MOV_CH_LAYOUT_MPEG_4_0_B = (116 << 16) | 4, MOV_CH_LAYOUT_MPEG_5_0_A = (117 << 16) | 5, MOV_CH_LAYOUT_MPEG_5_0_B = (118 << 16) | 5, MOV_CH_LAYOUT_MPEG_5_0_C = (119 << 16) | 5, MOV_CH_LAYOUT_MPEG_5_0_D = (120 << 16) | 5, MOV_CH_LAYOUT_MPEG_5_1_A = (121 << 16) | 6, MOV_CH_LAYOUT_MPEG_5_1_B = (122 << 16) | 6, MOV_CH_LAYOUT_MPEG_5_1_C = (123 << 16) | 6, MOV_CH_LAYOUT_MPEG_5_1_D = (124 << 16) | 6, MOV_CH_LAYOUT_MPEG_6_1_A = (125 << 16) | 7, MOV_CH_LAYOUT_MPEG_7_1_A = (126 << 16) | 8, MOV_CH_LAYOUT_MPEG_7_1_B = (127 << 16) | 8, MOV_CH_LAYOUT_MPEG_7_1_C = (128 << 16) | 8, MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1 = (129 << 16) | 8, MOV_CH_LAYOUT_SMPTE_DTV = (130 << 16) | 8, MOV_CH_LAYOUT_ITU_2_1 = (131 << 16) | 3, MOV_CH_LAYOUT_ITU_2_2 = (132 << 16) | 4, MOV_CH_LAYOUT_DVD_4 = (133 << 16) | 3, MOV_CH_LAYOUT_DVD_5 = (134 << 16) | 4, MOV_CH_LAYOUT_DVD_6 = (135 << 16) | 5, MOV_CH_LAYOUT_DVD_10 = (136 << 16) | 4, MOV_CH_LAYOUT_DVD_11 = (137 << 16) | 5, MOV_CH_LAYOUT_DVD_18 = (138 << 16) | 5, MOV_CH_LAYOUT_AUDIOUNIT_6_0 = (139 << 16) | 6, MOV_CH_LAYOUT_AUDIOUNIT_7_0 = (140 << 16) | 7, MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT = (148 << 16) | 7, MOV_CH_LAYOUT_AAC_6_0 = (141 << 16) | 6, MOV_CH_LAYOUT_AAC_6_1 = (142 << 16) | 7, MOV_CH_LAYOUT_AAC_7_0 = (143 << 16) | 7, MOV_CH_LAYOUT_AAC_OCTAGONAL = (144 << 16) | 8, MOV_CH_LAYOUT_TMH_10_2_STD = (145 << 16) | 16, MOV_CH_LAYOUT_TMH_10_2_FULL = (146 << 16) | 21, MOV_CH_LAYOUT_AC3_1_0_1 = (149 << 16) | 2, MOV_CH_LAYOUT_AC3_3_0 = (150 << 16) | 3, MOV_CH_LAYOUT_AC3_3_1 = (151 << 16) | 4, MOV_CH_LAYOUT_AC3_3_0_1 = (152 << 16) | 4, MOV_CH_LAYOUT_AC3_2_1_1 = (153 << 16) | 4, MOV_CH_LAYOUT_AC3_3_1_1 = (154 << 16) | 5, MOV_CH_LAYOUT_EAC3_6_0_A = (155 << 16) | 6, MOV_CH_LAYOUT_EAC3_7_0_A = (156 << 16) | 7, MOV_CH_LAYOUT_EAC3_6_1_A = (157 << 16) | 7, MOV_CH_LAYOUT_EAC3_6_1_B = (158 << 16) | 7, MOV_CH_LAYOUT_EAC3_6_1_C = (159 << 16) | 7, MOV_CH_LAYOUT_EAC3_7_1_A = (160 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_B = (161 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_C = (162 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_D = (163 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_E = (164 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_F = (165 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_G = (166 << 16) | 8, MOV_CH_LAYOUT_EAC3_7_1_H = (167 << 16) | 8, MOV_CH_LAYOUT_DTS_3_1 = (168 << 16) | 4, MOV_CH_LAYOUT_DTS_4_1 = (169 << 16) | 5, MOV_CH_LAYOUT_DTS_6_0_A = (170 << 16) | 6, MOV_CH_LAYOUT_DTS_6_0_B = (171 << 16) | 6, MOV_CH_LAYOUT_DTS_6_0_C = (172 << 16) | 6, MOV_CH_LAYOUT_DTS_6_1_A = (173 << 16) | 7, MOV_CH_LAYOUT_DTS_6_1_B = (174 << 16) | 7, MOV_CH_LAYOUT_DTS_6_1_C = (175 << 16) | 7, MOV_CH_LAYOUT_DTS_6_1_D = (182 << 16) | 7, MOV_CH_LAYOUT_DTS_7_0 = (176 << 16) | 7, MOV_CH_LAYOUT_DTS_7_1 = (177 << 16) | 8, MOV_CH_LAYOUT_DTS_8_0_A = (178 << 16) | 8, MOV_CH_LAYOUT_DTS_8_0_B = (179 << 16) | 8, MOV_CH_LAYOUT_DTS_8_1_A = (180 << 16) | 9, MOV_CH_LAYOUT_DTS_8_1_B = (181 << 16) | 9, }; struct MovChannelLayoutMap { uint32_t tag; uint64_t layout; }; static const struct MovChannelLayoutMap mov_ch_layout_map_misc[] = { { MOV_CH_LAYOUT_USE_DESCRIPTIONS, 0 }, { MOV_CH_LAYOUT_USE_BITMAP, 0 }, { MOV_CH_LAYOUT_DISCRETEINORDER, 0 }, { MOV_CH_LAYOUT_UNKNOWN, 0 }, { MOV_CH_LAYOUT_TMH_10_2_STD, 0 }, // L, R, C, Vhc, Lsd, Rsd, // Ls, Rs, Vhl, Vhr, Lw, Rw, // Csd, Cs, LFE1, LFE2 { MOV_CH_LAYOUT_TMH_10_2_FULL, 0 }, // L, R, C, Vhc, Lsd, Rsd, // Ls, Rs, Vhl, Vhr, Lw, Rw, // Csd, Cs, LFE1, LFE2, Lc, Rc, // HI, VI, Haptic { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_1ch[] = { { MOV_CH_LAYOUT_MONO, AV_CH_LAYOUT_MONO }, // C { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_2ch[] = { { MOV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO }, // L, R { MOV_CH_LAYOUT_STEREOHEADPHONES, AV_CH_LAYOUT_STEREO }, // L, R { MOV_CH_LAYOUT_BINAURAL, AV_CH_LAYOUT_STEREO }, // L, R { MOV_CH_LAYOUT_MIDSIDE, AV_CH_LAYOUT_STEREO }, // C, sides { MOV_CH_LAYOUT_XY, AV_CH_LAYOUT_STEREO }, // X (left), Y (right) { MOV_CH_LAYOUT_MATRIXSTEREO, AV_CH_LAYOUT_STEREO_DOWNMIX }, // Lt, Rt { MOV_CH_LAYOUT_AC3_1_0_1, AV_CH_LAYOUT_MONO | // C, LFE AV_CH_LOW_FREQUENCY }, { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_3ch[] = { { MOV_CH_LAYOUT_MPEG_3_0_A, AV_CH_LAYOUT_SURROUND }, // L, R, C { MOV_CH_LAYOUT_MPEG_3_0_B, AV_CH_LAYOUT_SURROUND }, // C, L, R { MOV_CH_LAYOUT_AC3_3_0, AV_CH_LAYOUT_SURROUND }, // L, C, R { MOV_CH_LAYOUT_ITU_2_1, AV_CH_LAYOUT_2_1 }, // L, R, Cs { MOV_CH_LAYOUT_DVD_4, AV_CH_LAYOUT_2POINT1 }, // L, R, LFE { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_4ch[] = { { MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, 0 }, // W, X, Y, Z { MOV_CH_LAYOUT_QUADRAPHONIC, AV_CH_LAYOUT_QUAD }, // L, R, Rls, Rrs { MOV_CH_LAYOUT_MPEG_4_0_A, AV_CH_LAYOUT_4POINT0 }, // L, R, C, Cs { MOV_CH_LAYOUT_MPEG_4_0_B, AV_CH_LAYOUT_4POINT0 }, // C, L, R, Cs { MOV_CH_LAYOUT_AC3_3_1, AV_CH_LAYOUT_4POINT0 }, // L, C, R, Cs { MOV_CH_LAYOUT_ITU_2_2, AV_CH_LAYOUT_2_2 }, // L, R, Ls, Rs { MOV_CH_LAYOUT_DVD_5, AV_CH_LAYOUT_2_1 | // L, R, LFE, Cs AV_CH_LOW_FREQUENCY }, { MOV_CH_LAYOUT_AC3_2_1_1, AV_CH_LAYOUT_2_1 | // L, R, Cs, LFE AV_CH_LOW_FREQUENCY }, { MOV_CH_LAYOUT_DVD_10, AV_CH_LAYOUT_3POINT1 }, // L, R, C, LFE { MOV_CH_LAYOUT_AC3_3_0_1, AV_CH_LAYOUT_3POINT1 }, // L, C, R, LFE { MOV_CH_LAYOUT_DTS_3_1, AV_CH_LAYOUT_3POINT1 }, // C, L, R, LFE { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_5ch[] = { { MOV_CH_LAYOUT_PENTAGONAL, AV_CH_LAYOUT_5POINT0_BACK }, // L, R, Rls, Rrs, C { MOV_CH_LAYOUT_MPEG_5_0_A, AV_CH_LAYOUT_5POINT0 }, // L, R, C, Ls, Rs { MOV_CH_LAYOUT_MPEG_5_0_B, AV_CH_LAYOUT_5POINT0 }, // L, R, Ls, Rs, C { MOV_CH_LAYOUT_MPEG_5_0_C, AV_CH_LAYOUT_5POINT0 }, // L, C, R, Ls, Rs { MOV_CH_LAYOUT_MPEG_5_0_D, AV_CH_LAYOUT_5POINT0 }, // C, L, R, Ls, Rs { MOV_CH_LAYOUT_DVD_6, AV_CH_LAYOUT_2_2 | // L, R, LFE, Ls, Rs AV_CH_LOW_FREQUENCY }, { MOV_CH_LAYOUT_DVD_18, AV_CH_LAYOUT_2_2 | // L, R, Ls, Rs, LFE AV_CH_LOW_FREQUENCY }, { MOV_CH_LAYOUT_DVD_11, AV_CH_LAYOUT_4POINT1 }, // L, R, C, LFE, Cs { MOV_CH_LAYOUT_AC3_3_1_1, AV_CH_LAYOUT_4POINT1 }, // L, C, R, Cs, LFE { MOV_CH_LAYOUT_DTS_4_1, AV_CH_LAYOUT_4POINT1 }, // C, L, R, Cs, LFE { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_6ch[] = { { MOV_CH_LAYOUT_HEXAGONAL, AV_CH_LAYOUT_HEXAGONAL }, // L, R, Rls, Rrs, C, Cs { MOV_CH_LAYOUT_DTS_6_0_C, AV_CH_LAYOUT_HEXAGONAL }, // C, Cs, L, R, Rls, Rrs { MOV_CH_LAYOUT_MPEG_5_1_A, AV_CH_LAYOUT_5POINT1 }, // L, R, C, LFE, Ls, Rs { MOV_CH_LAYOUT_MPEG_5_1_B, AV_CH_LAYOUT_5POINT1 }, // L, R, Ls, Rs, C, LFE { MOV_CH_LAYOUT_MPEG_5_1_C, AV_CH_LAYOUT_5POINT1 }, // L, C, R, Ls, Rs, LFE { MOV_CH_LAYOUT_MPEG_5_1_D, AV_CH_LAYOUT_5POINT1 }, // C, L, R, Ls, Rs, LFE { MOV_CH_LAYOUT_AUDIOUNIT_6_0, AV_CH_LAYOUT_6POINT0 }, // L, R, Ls, Rs, C, Cs { MOV_CH_LAYOUT_AAC_6_0, AV_CH_LAYOUT_6POINT0 }, // C, L, R, Ls, Rs, Cs { MOV_CH_LAYOUT_EAC3_6_0_A, AV_CH_LAYOUT_6POINT0 }, // L, C, R, Ls, Rs, Cs { MOV_CH_LAYOUT_DTS_6_0_A, AV_CH_LAYOUT_6POINT0_FRONT }, // Lc, Rc, L, R, Ls, Rs { MOV_CH_LAYOUT_DTS_6_0_B, AV_CH_LAYOUT_5POINT0_BACK | // C, L, R, Rls, Rrs, Ts AV_CH_TOP_CENTER }, { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_7ch[] = { { MOV_CH_LAYOUT_MPEG_6_1_A, AV_CH_LAYOUT_6POINT1 }, // L, R, C, LFE, Ls, Rs, Cs { MOV_CH_LAYOUT_AAC_6_1, AV_CH_LAYOUT_6POINT1 }, // C, L, R, Ls, Rs, Cs, LFE { MOV_CH_LAYOUT_EAC3_6_1_A, AV_CH_LAYOUT_6POINT1 }, // L, C, R, Ls, Rs, LFE, Cs { MOV_CH_LAYOUT_DTS_6_1_D, AV_CH_LAYOUT_6POINT1 }, // C, L, R, Ls, Rs, LFE, Cs { MOV_CH_LAYOUT_AUDIOUNIT_7_0, AV_CH_LAYOUT_7POINT0 }, // L, R, Ls, Rs, C, Rls, Rrs { MOV_CH_LAYOUT_AAC_7_0, AV_CH_LAYOUT_7POINT0 }, // C, L, R, Ls, Rs, Rls, Rrs { MOV_CH_LAYOUT_EAC3_7_0_A, AV_CH_LAYOUT_7POINT0 }, // L, C, R, Ls, Rs, Rls, Rrs { MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, AV_CH_LAYOUT_7POINT0_FRONT }, // L, R, Ls, Rs, C, Lc, Rc { MOV_CH_LAYOUT_DTS_7_0, AV_CH_LAYOUT_7POINT0_FRONT }, // Lc, C, Rc, L, R, Ls, Rs { MOV_CH_LAYOUT_EAC3_6_1_B, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Ts AV_CH_TOP_CENTER }, { MOV_CH_LAYOUT_EAC3_6_1_C, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Vhc AV_CH_TOP_FRONT_CENTER }, { MOV_CH_LAYOUT_DTS_6_1_A, AV_CH_LAYOUT_6POINT1_FRONT }, // Lc, Rc, L, R, Ls, Rs, LFE { MOV_CH_LAYOUT_DTS_6_1_B, AV_CH_LAYOUT_5POINT1_BACK | // C, L, R, Rls, Rrs, Ts, LFE AV_CH_TOP_CENTER }, { MOV_CH_LAYOUT_DTS_6_1_C, AV_CH_LAYOUT_6POINT1_BACK }, // C, Cs, L, R, Rls, Rrs, LFE { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_8ch[] = { { MOV_CH_LAYOUT_OCTAGONAL, AV_CH_LAYOUT_OCTAGONAL }, // L, R, Rls, Rrs, C, Cs, Ls, Rs { MOV_CH_LAYOUT_AAC_OCTAGONAL, AV_CH_LAYOUT_OCTAGONAL }, // C, L, R, Ls, Rs, Rls, Rrs, Cs { MOV_CH_LAYOUT_CUBE, AV_CH_LAYOUT_QUAD | // L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT | AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT }, { MOV_CH_LAYOUT_MPEG_7_1_A, AV_CH_LAYOUT_7POINT1_WIDE }, // L, R, C, LFE, Ls, Rs, Lc, Rc { MOV_CH_LAYOUT_MPEG_7_1_B, AV_CH_LAYOUT_7POINT1_WIDE }, // C, Lc, Rc, L, R, Ls, Rs, LFE { MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1, AV_CH_LAYOUT_7POINT1_WIDE }, // L, R, Ls, Rs, C, LFE, Lc, Rc { MOV_CH_LAYOUT_EAC3_7_1_B, AV_CH_LAYOUT_7POINT1_WIDE }, // L, C, R, Ls, Rs, LFE, Lc, Rc { MOV_CH_LAYOUT_DTS_7_1, AV_CH_LAYOUT_7POINT1_WIDE }, // Lc, C, Rc, L, R, Ls, Rs, LFE { MOV_CH_LAYOUT_MPEG_7_1_C, AV_CH_LAYOUT_7POINT1 }, // L, R, C, LFE, Ls, Rs, Rls, Rrs { MOV_CH_LAYOUT_EAC3_7_1_A, AV_CH_LAYOUT_7POINT1 }, // L, C, R, Ls, Rs, LFE, Rls, Rrs { MOV_CH_LAYOUT_SMPTE_DTV, AV_CH_LAYOUT_5POINT1 | // L, R, C, LFE, Ls, Rs, Lt, Rt AV_CH_LAYOUT_STEREO_DOWNMIX }, { MOV_CH_LAYOUT_EAC3_7_1_C, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Lsd, Rsd AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT }, { MOV_CH_LAYOUT_EAC3_7_1_D, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Lw, Rw AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT }, { MOV_CH_LAYOUT_EAC3_7_1_E, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Vhl, Vhr AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT }, { MOV_CH_LAYOUT_EAC3_7_1_F, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Cs, Ts AV_CH_BACK_CENTER | AV_CH_TOP_CENTER }, { MOV_CH_LAYOUT_EAC3_7_1_G, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Cs, Vhc AV_CH_BACK_CENTER | AV_CH_TOP_FRONT_CENTER }, { MOV_CH_LAYOUT_EAC3_7_1_H, AV_CH_LAYOUT_5POINT1 | // L, C, R, Ls, Rs, LFE, Ts, Vhc AV_CH_TOP_CENTER | AV_CH_TOP_FRONT_CENTER }, { MOV_CH_LAYOUT_DTS_8_0_A, AV_CH_LAYOUT_2_2 | // Lc, Rc, L, R, Ls, Rs, Rls, Rrs AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER }, { MOV_CH_LAYOUT_DTS_8_0_B, AV_CH_LAYOUT_5POINT0 | // Lc, C, Rc, L, R, Ls, Cs, Rs AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_BACK_CENTER }, { 0, 0 }, }; static const struct MovChannelLayoutMap mov_ch_layout_map_9ch[] = { { MOV_CH_LAYOUT_DTS_8_1_A, AV_CH_LAYOUT_2_2 | // Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LOW_FREQUENCY }, { MOV_CH_LAYOUT_DTS_8_1_B, AV_CH_LAYOUT_7POINT1_WIDE | // Lc, C, Rc, L, R, Ls, Cs, Rs, LFE AV_CH_BACK_CENTER }, { 0, 0 }, }; static const struct MovChannelLayoutMap *mov_ch_layout_map[] = { mov_ch_layout_map_misc, mov_ch_layout_map_1ch, mov_ch_layout_map_2ch, mov_ch_layout_map_3ch, mov_ch_layout_map_4ch, mov_ch_layout_map_5ch, mov_ch_layout_map_6ch, mov_ch_layout_map_7ch, mov_ch_layout_map_8ch, mov_ch_layout_map_9ch, }; static const enum MovChannelLayoutTag mov_ch_layouts_aac[] = { MOV_CH_LAYOUT_MONO, MOV_CH_LAYOUT_STEREO, MOV_CH_LAYOUT_AC3_1_0_1, MOV_CH_LAYOUT_MPEG_3_0_B, MOV_CH_LAYOUT_ITU_2_1, MOV_CH_LAYOUT_DVD_4, MOV_CH_LAYOUT_QUADRAPHONIC, MOV_CH_LAYOUT_MPEG_4_0_B, MOV_CH_LAYOUT_ITU_2_2, MOV_CH_LAYOUT_AC3_2_1_1, MOV_CH_LAYOUT_DTS_3_1, MOV_CH_LAYOUT_MPEG_5_0_D, MOV_CH_LAYOUT_DVD_18, MOV_CH_LAYOUT_DTS_4_1, MOV_CH_LAYOUT_MPEG_5_1_D, MOV_CH_LAYOUT_AAC_6_0, MOV_CH_LAYOUT_DTS_6_0_A, MOV_CH_LAYOUT_AAC_6_1, MOV_CH_LAYOUT_AAC_7_0, MOV_CH_LAYOUT_DTS_6_1_A, MOV_CH_LAYOUT_AAC_OCTAGONAL, MOV_CH_LAYOUT_MPEG_7_1_B, MOV_CH_LAYOUT_DTS_8_0_A, 0, }; static const enum MovChannelLayoutTag mov_ch_layouts_ac3[] = { MOV_CH_LAYOUT_MONO, MOV_CH_LAYOUT_STEREO, MOV_CH_LAYOUT_AC3_1_0_1, MOV_CH_LAYOUT_AC3_3_0, MOV_CH_LAYOUT_ITU_2_1, MOV_CH_LAYOUT_DVD_4, MOV_CH_LAYOUT_AC3_3_1, MOV_CH_LAYOUT_ITU_2_2, MOV_CH_LAYOUT_AC3_2_1_1, MOV_CH_LAYOUT_AC3_3_0_1, MOV_CH_LAYOUT_MPEG_5_0_C, MOV_CH_LAYOUT_DVD_18, MOV_CH_LAYOUT_AC3_3_1_1, MOV_CH_LAYOUT_MPEG_5_1_C, 0, }; static const enum MovChannelLayoutTag mov_ch_layouts_alac[] = { MOV_CH_LAYOUT_MONO, MOV_CH_LAYOUT_STEREO, MOV_CH_LAYOUT_MPEG_3_0_B, MOV_CH_LAYOUT_MPEG_4_0_B, MOV_CH_LAYOUT_MPEG_5_0_D, MOV_CH_LAYOUT_MPEG_5_1_D, MOV_CH_LAYOUT_AAC_6_1, MOV_CH_LAYOUT_MPEG_7_1_B, 0, }; static const enum MovChannelLayoutTag mov_ch_layouts_wav[] = { MOV_CH_LAYOUT_MONO, MOV_CH_LAYOUT_STEREO, MOV_CH_LAYOUT_MATRIXSTEREO, MOV_CH_LAYOUT_MPEG_3_0_A, MOV_CH_LAYOUT_QUADRAPHONIC, MOV_CH_LAYOUT_MPEG_5_0_A, MOV_CH_LAYOUT_MPEG_5_1_A, MOV_CH_LAYOUT_MPEG_6_1_A, MOV_CH_LAYOUT_MPEG_7_1_A, MOV_CH_LAYOUT_MPEG_7_1_C, MOV_CH_LAYOUT_SMPTE_DTV, }; static const struct { enum AVCodecID codec_id; const enum MovChannelLayoutTag *layouts; } mov_codec_ch_layouts[] = { { AV_CODEC_ID_AAC, mov_ch_layouts_aac }, { AV_CODEC_ID_AC3, mov_ch_layouts_ac3 }, { AV_CODEC_ID_ALAC, mov_ch_layouts_alac }, { AV_CODEC_ID_PCM_U8, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S8, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S16LE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S16BE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S24LE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S24BE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S32LE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_S32BE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_F32LE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_F32BE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_F64LE, mov_ch_layouts_wav }, { AV_CODEC_ID_PCM_F64BE, mov_ch_layouts_wav }, { AV_CODEC_ID_NONE, NULL }, }; uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap) { int i, channels; const struct MovChannelLayoutMap *layout_map; /* use ff_mov_get_channel_label() to build a layout instead */ if (tag == MOV_CH_LAYOUT_USE_DESCRIPTIONS) return 0; /* handle the use of the channel bitmap */ if (tag == MOV_CH_LAYOUT_USE_BITMAP) return bitmap < 0x40000 ? bitmap : 0; /* get the layout map based on the channel count for the specified layout tag */ channels = tag & 0xFFFF; if (channels > 9) channels = 0; layout_map = mov_ch_layout_map[channels]; /* find the channel layout for the specified layout tag */ for (i = 0; layout_map[i].tag != 0; i++) { if (layout_map[i].tag == tag) break; } return layout_map[i].layout; } static uint32_t mov_get_channel_label(uint32_t label) { if (label == 0) return 0; if (label <= 18) return 1U << (label - 1); if (label == 38) return AV_CH_STEREO_LEFT; if (label == 39) return AV_CH_STEREO_RIGHT; return 0; } uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id, uint64_t channel_layout, uint32_t *bitmap) { int i, j; uint32_t tag = 0; const enum MovChannelLayoutTag *layouts = NULL; /* find the layout list for the specified codec */ for (i = 0; mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE; i++) { if (mov_codec_ch_layouts[i].codec_id == codec_id) break; } if (mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE) layouts = mov_codec_ch_layouts[i].layouts; if (layouts) { int channels; const struct MovChannelLayoutMap *layout_map; /* get the layout map based on the channel count */ channels = av_get_channel_layout_nb_channels(channel_layout); if (channels > 9) channels = 0; layout_map = mov_ch_layout_map[channels]; /* find the layout tag for the specified channel layout */ for (i = 0; layouts[i] != 0; i++) { if ((layouts[i] & 0xFFFF) != channels) continue; for (j = 0; layout_map[j].tag != 0; j++) { if (layout_map[j].tag == layouts[i] && layout_map[j].layout == channel_layout) break; } if (layout_map[j].tag) break; } tag = layouts[i]; } /* if no tag was found, use channel bitmap as a backup if possible */ if (tag == 0 && channel_layout > 0 && channel_layout < 0x40000) { tag = MOV_CH_LAYOUT_USE_BITMAP; *bitmap = (uint32_t)channel_layout; } else *bitmap = 0; /* TODO: set channel descriptions as a secondary backup */ return tag; } int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size) { uint32_t layout_tag, bitmap, num_descr, label_mask; int i; if (size < 12) return AVERROR_INVALIDDATA; layout_tag = avio_rb32(pb); bitmap = avio_rb32(pb); num_descr = avio_rb32(pb); av_log(s, AV_LOG_TRACE, "chan: layout=%u bitmap=%u num_descr=%u\n", layout_tag, bitmap, num_descr); if (size < 12ULL + num_descr * 20ULL) return 0; label_mask = 0; for (i = 0; i < num_descr; i++) { uint32_t label; if (pb->eof_reached) { av_log(s, AV_LOG_ERROR, "reached EOF while reading channel layout\n"); return AVERROR_INVALIDDATA; } label = avio_rb32(pb); // mChannelLabel avio_rb32(pb); // mChannelFlags avio_rl32(pb); // mCoordinates[0] avio_rl32(pb); // mCoordinates[1] avio_rl32(pb); // mCoordinates[2] if (layout_tag == 0) { uint32_t mask_incr = mov_get_channel_label(label); if (mask_incr == 0) { label_mask = 0; break; } label_mask |= mask_incr; } } if (layout_tag == 0) { if (label_mask) st->codecpar->channel_layout = label_mask; } else st->codecpar->channel_layout = ff_mov_get_channel_layout(layout_tag, bitmap); return 0; }