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FFmpeg/libavformat/mov_chan.c

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/*
* 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/audioconvert.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
};
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 struct {
enum CodecID codec_id;
const enum MovChannelLayoutTag *layouts;
} mov_codec_ch_layouts[] = {
{ CODEC_ID_AAC, mov_ch_layouts_aac },
{ CODEC_ID_AC3, mov_ch_layouts_ac3 },
{ CODEC_ID_ALAC, mov_ch_layouts_alac },
{ 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;
/* handle the use of the channel descriptions */
/* TODO: map MOV channel labels to FFmpeg channels */
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;
}
uint32_t ff_mov_get_channel_layout_tag(enum CodecID 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 != CODEC_ID_NONE; i++) {
if (mov_codec_ch_layouts[i].codec_id == codec_id)
break;
}
if (mov_codec_ch_layouts[i].codec_id != 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;
}