/* * Copyright (c) 2011 Justin Ruggles * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; 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 #include #include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/mem.h" #include "libavcodec/codec_id.h" #include "mov_chan.h" enum { c_L = AV_CHAN_FRONT_LEFT, c_R = AV_CHAN_FRONT_RIGHT, c_C = AV_CHAN_FRONT_CENTER, c_LFE = AV_CHAN_LOW_FREQUENCY, c_Rls = AV_CHAN_BACK_LEFT, c_Rrs = AV_CHAN_BACK_RIGHT, c_Lc = AV_CHAN_FRONT_LEFT_OF_CENTER, c_Rc = AV_CHAN_FRONT_RIGHT_OF_CENTER, c_Cs = AV_CHAN_BACK_CENTER, c_Ls = AV_CHAN_SIDE_LEFT, c_Rs = AV_CHAN_SIDE_RIGHT, c_Ts = AV_CHAN_TOP_CENTER, c_Vhl = AV_CHAN_TOP_FRONT_LEFT, c_Vhc = AV_CHAN_TOP_FRONT_CENTER, c_Vhr = AV_CHAN_TOP_FRONT_RIGHT, c_Rlt = AV_CHAN_TOP_BACK_LEFT, // = AV_CHAN_TOP_BACK_CENTER, c_Rrt = AV_CHAN_TOP_BACK_RIGHT, c_Lt = AV_CHAN_STEREO_LEFT, c_Rt = AV_CHAN_STEREO_RIGHT, c_Lw = AV_CHAN_WIDE_LEFT, c_Rw = AV_CHAN_WIDE_RIGHT, c_Lsd = AV_CHAN_SURROUND_DIRECT_LEFT, c_Rsd = AV_CHAN_SURROUND_DIRECT_RIGHT, c_LFE2 = AV_CHAN_LOW_FREQUENCY_2, // = AV_CHAN_TOP_SIDE_LEFT, // = AV_CHAN_TOP_SIDE_RIGHT, // = AV_CHAN_BOTTOM_FRONT_CENTER, // = AV_CHAN_BOTTOM_FRONT_LEFT, // = AV_CHAN_BOTTOM_FRONT_RIGHT, c_W = AV_CHAN_AMBISONIC_BASE, c_Y = AV_CHAN_AMBISONIC_BASE + 1, c_Z = AV_CHAN_AMBISONIC_BASE + 2, c_X = AV_CHAN_AMBISONIC_BASE + 3, /* The following have no exact counterparts */ c_LFE1 = AV_CHAN_LOW_FREQUENCY, c_Csd = AV_CHAN_NONE, c_HI = AV_CHAN_NONE, c_VI = AV_CHAN_NONE, c_Haptic = AV_CHAN_NONE, }; enum { iso_L = AV_CHAN_FRONT_LEFT, iso_R = AV_CHAN_FRONT_RIGHT, iso_C = AV_CHAN_FRONT_CENTER, iso_LFE = AV_CHAN_LOW_FREQUENCY, iso_Lsr = AV_CHAN_BACK_LEFT, iso_Rsr = AV_CHAN_BACK_RIGHT, iso_Lc = AV_CHAN_FRONT_LEFT_OF_CENTER, iso_Rc = AV_CHAN_FRONT_RIGHT_OF_CENTER, iso_Cs = AV_CHAN_BACK_CENTER, iso_Ls = AV_CHAN_SIDE_LEFT, iso_Rs = AV_CHAN_SIDE_RIGHT, iso_Ts = AV_CHAN_TOP_CENTER, iso_Lv = AV_CHAN_TOP_FRONT_LEFT, iso_Cv = AV_CHAN_TOP_FRONT_CENTER, iso_Rv = AV_CHAN_TOP_FRONT_RIGHT, iso_Lvr = AV_CHAN_TOP_BACK_LEFT, iso_Cvr = AV_CHAN_TOP_BACK_CENTER, iso_Rvr = AV_CHAN_TOP_BACK_RIGHT, // = AV_CHAN_STEREO_LEFT, // = AV_CHAN_STEREO_RIGHT, iso_Lw = AV_CHAN_WIDE_LEFT, iso_Rw = AV_CHAN_WIDE_RIGHT, iso_Lsd = AV_CHAN_SURROUND_DIRECT_LEFT, iso_Rsd = AV_CHAN_SURROUND_DIRECT_RIGHT, iso_LFE2 = AV_CHAN_LOW_FREQUENCY_2, iso_Lvss = AV_CHAN_TOP_SIDE_LEFT, iso_Rvss = AV_CHAN_TOP_SIDE_RIGHT, iso_Cb = AV_CHAN_BOTTOM_FRONT_CENTER, iso_Lb = AV_CHAN_BOTTOM_FRONT_LEFT, iso_Rb = AV_CHAN_BOTTOM_FRONT_RIGHT, iso_Lss = AV_CHAN_SIDE_SURROUND_LEFT, iso_Rss = AV_CHAN_SIDE_SURROUND_RIGHT, /* The following have no exact counterparts */ iso_Lvs = AV_CHAN_NONE, iso_Rvs = AV_CHAN_NONE, }; struct MovChannelLayoutMap { union { uint32_t tag; enum AVChannel id; }; }; #define TAG(_tag, _cnt) {.tag = _tag} #define ID(_0) {.id = c_##_0} #define CHLIST01(_tag, _1) CHLIST(_tag, 1, ID(_1)) #define CHLIST02(_tag, _1, _2) CHLIST(_tag, 2, ID(_1), ID(_2)) #define CHLIST03(_tag, _1, _2, _3) CHLIST(_tag, 3, ID(_1), ID(_2), ID(_3)) #define CHLIST04(_tag, _1, _2, _3, _4) CHLIST(_tag, 4, ID(_1), ID(_2), ID(_3), ID(_4)) #define CHLIST05(_tag, _1, _2, _3, _4, _5) CHLIST(_tag, 5, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5)) #define CHLIST06(_tag, _1, _2, _3, _4, _5, _6) CHLIST(_tag, 6, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6)) #define CHLIST07(_tag, _1, _2, _3, _4, _5, _6, _7) CHLIST(_tag, 7, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7)) #define CHLIST08(_tag, _1, _2, _3, _4, _5, _6, _7, _8) CHLIST(_tag, 8, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8)) #define CHLIST09(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9) CHLIST(_tag, 9, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9)) #define CHLIST16(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16) \ CHLIST(_tag, 16, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \ ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16)) #define CHLIST21(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21) \ CHLIST(_tag, 21, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \ ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), ID(_21)) #define CHLIST24(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24) \ CHLIST(_tag, 24, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \ ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), \ ID(_21), ID(_22), ID(_23), ID(_24)) #define MOV_CH_LAYOUT_MAP \ CHLIST01( MOV_CH_LAYOUT_MONO, C )\ CHLIST02( MOV_CH_LAYOUT_STEREO, L, R )\ CHLIST02( MOV_CH_LAYOUT_STEREOHEADPHONES, L, R )\ CHLIST02( MOV_CH_LAYOUT_BINAURAL, L, R )\ CHLIST02( MOV_CH_LAYOUT_MIDSIDE, L, R )\ CHLIST02( MOV_CH_LAYOUT_XY, L, R )\ CHLIST02( MOV_CH_LAYOUT_MATRIXSTEREO, Lt, Rt )\ CHLIST02( MOV_CH_LAYOUT_AC3_1_0_1, C, LFE )\ CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_A, L, R, C )\ CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_B, C, L, R )\ CHLIST03( MOV_CH_LAYOUT_AC3_3_0, L, C, R )\ CHLIST03( MOV_CH_LAYOUT_ITU_2_1, L, R, Cs )\ CHLIST03( MOV_CH_LAYOUT_DVD_4, L, R, LFE )\ CHLIST04( MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, W, X, Y, Z )\ CHLIST04( MOV_CH_LAYOUT_QUADRAPHONIC, L, R, Rls, Rrs )\ CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_A, L, R, C, Cs )\ CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_B, C, L, R, Cs )\ CHLIST04( MOV_CH_LAYOUT_AC3_3_1, L, C, R, Cs )\ CHLIST04( MOV_CH_LAYOUT_ITU_2_2, L, R, Ls, Rs )\ CHLIST04( MOV_CH_LAYOUT_DVD_5, L, R, LFE, Cs )\ CHLIST04( MOV_CH_LAYOUT_AC3_2_1_1, L, R, Cs, LFE )\ CHLIST04( MOV_CH_LAYOUT_DVD_10, L, R, C, LFE )\ CHLIST04( MOV_CH_LAYOUT_AC3_3_0_1, L, C, R, LFE )\ CHLIST04( MOV_CH_LAYOUT_DTS_3_1, C, L, R, LFE )\ CHLIST05( MOV_CH_LAYOUT_PENTAGONAL, L, R, Rls, Rrs, C )\ CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_A, L, R, C, Ls, Rs )\ CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_B, L, R, Ls, Rs, C )\ CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_C, L, C, R, Ls, Rs )\ CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_D, C, L, R, Ls, Rs )\ CHLIST05( MOV_CH_LAYOUT_DVD_6, L, R, LFE, Ls, Rs )\ CHLIST05( MOV_CH_LAYOUT_DVD_18, L, R, Ls, Rs, LFE )\ CHLIST05( MOV_CH_LAYOUT_DVD_11, L, R, C, LFE, Cs )\ CHLIST05( MOV_CH_LAYOUT_AC3_3_1_1, L, C, R, Cs, LFE )\ CHLIST05( MOV_CH_LAYOUT_DTS_4_1, C, L, R, Cs, LFE )\ CHLIST06( MOV_CH_LAYOUT_HEXAGONAL, L, R, Rls, Rrs, C, Cs )\ CHLIST06( MOV_CH_LAYOUT_DTS_6_0_C, C, Cs, L, R, Rls, Rrs )\ CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_A, L, R, C, LFE, Ls, Rs )\ CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_B, L, R, Ls, Rs, C, LFE )\ CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_C, L, C, R, Ls, Rs, LFE )\ CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_D, C, L, R, Ls, Rs, LFE )\ CHLIST06( MOV_CH_LAYOUT_AUDIOUNIT_6_0, L, R, Ls, Rs, C, Cs )\ CHLIST06( MOV_CH_LAYOUT_AAC_6_0, C, L, R, Ls, Rs, Cs )\ CHLIST06( MOV_CH_LAYOUT_EAC3_6_0_A, L, C, R, Ls, Rs, Cs )\ CHLIST06( MOV_CH_LAYOUT_DTS_6_0_A, Lc, Rc, L, R, Ls, Rs )\ CHLIST06( MOV_CH_LAYOUT_DTS_6_0_B, C, L, R, Rls, Rrs, Ts )\ CHLIST07( MOV_CH_LAYOUT_MPEG_6_1_A, L, R, C, LFE, Ls, Rs, Cs )\ CHLIST07( MOV_CH_LAYOUT_AAC_6_1, C, L, R, Ls, Rs, Cs, LFE )\ CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_A, L, C, R, Ls, Rs, LFE, Cs )\ CHLIST07( MOV_CH_LAYOUT_DTS_6_1_D, C, L, R, Ls, Rs, LFE, Cs )\ CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0, L, R, Ls, Rs, C, Rls, Rrs )\ CHLIST07( MOV_CH_LAYOUT_AAC_7_0, C, L, R, Ls, Rs, Rls, Rrs )\ CHLIST07( MOV_CH_LAYOUT_EAC3_7_0_A, L, C, R, Ls, Rs, Rls, Rrs )\ CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, L, R, Ls, Rs, C, Lc, Rc )\ CHLIST07( MOV_CH_LAYOUT_DTS_7_0, Lc, C, Rc, L, R, Ls, Rs )\ CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_B, L, C, R, Ls, Rs, LFE, Ts )\ CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_C, L, C, R, Ls, Rs, LFE, Vhc )\ CHLIST07( MOV_CH_LAYOUT_DTS_6_1_A, Lc, Rc, L, R, Ls, Rs, LFE )\ CHLIST07( MOV_CH_LAYOUT_DTS_6_1_B, C, L, R, Rls, Rrs, Ts, LFE )\ CHLIST07( MOV_CH_LAYOUT_DTS_6_1_C, C, Cs, L, R, Rls, Rrs, LFE )\ CHLIST08( MOV_CH_LAYOUT_OCTAGONAL, L, R, Rls, Rrs, C, Cs, Ls, Rs )\ CHLIST08( MOV_CH_LAYOUT_AAC_OCTAGONAL, C, L, R, Ls, Rs, Rls, Rrs, Cs )\ CHLIST08( MOV_CH_LAYOUT_CUBE, L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt )\ CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_A, L, R, C, LFE, Ls, Rs, Lc, Rc )\ CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_B, C, Lc, Rc, L, R, Ls, Rs, LFE )\ CHLIST08( MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1, L, R, Ls, Rs, C, LFE, Lc, Rc )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_B, L, C, R, Ls, Rs, LFE, Lc, Rc )\ CHLIST08( MOV_CH_LAYOUT_DTS_7_1, Lc, C, Rc, L, R, Ls, Rs, LFE )\ CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_C, L, R, C, LFE, Ls, Rs, Rls, Rrs )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_A, L, C, R, Ls, Rs, LFE, Rls, Rrs )\ CHLIST08( MOV_CH_LAYOUT_SMPTE_DTV, L, R, C, LFE, Ls, Rs, Lt, Rt )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_C, L, C, R, Ls, Rs, LFE, Lsd, Rsd )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_D, L, C, R, Ls, Rs, LFE, Lw, Rw )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_E, L, C, R, Ls, Rs, LFE, Vhl, Vhr )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_F, L, C, R, Ls, Rs, LFE, Cs, Ts )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_G, L, C, R, Ls, Rs, LFE, Cs, Vhc )\ CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_H, L, C, R, Ls, Rs, LFE, Ts, Vhc )\ CHLIST08( MOV_CH_LAYOUT_DTS_8_0_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs )\ CHLIST08( MOV_CH_LAYOUT_DTS_8_0_B, Lc, C, Rc, L, R, Ls, Cs, Rs )\ CHLIST09( MOV_CH_LAYOUT_DTS_8_1_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE )\ CHLIST09( MOV_CH_LAYOUT_DTS_8_1_B, Lc, C, Rc, L, R, Ls, Cs, Rs, LFE )\ CHLIST16( MOV_CH_LAYOUT_TMH_10_2_STD, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2 )\ CHLIST21( MOV_CH_LAYOUT_TMH_10_2_FULL, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2, Lc, Rc, HI, VI, Haptic )\ #define CHLIST(_tag, _cnt, ...) static_assert((_tag & 0xffff) == _cnt, "Channel count of " #_tag " is not " #_cnt); MOV_CH_LAYOUT_MAP #undef CHLIST #define CHLIST(_tag, _cnt, ...) TAG(_tag, _cnt), __VA_ARGS__, static const struct MovChannelLayoutMap mov_ch_layout_map[] = { MOV_CH_LAYOUT_MAP { {0} }, }; #undef ID #undef TAG #define ID(_0) {.id = iso_##_0} #define TAG(_tag, _cnt) {.tag = (_tag << 16) | _cnt} /* ISO/IEC 23001-8 */ static const struct MovChannelLayoutMap iso_ch_layout_map[] = { CHLIST01( 1, C ) CHLIST02( 2, L, R ) CHLIST03( 3, C, L, R ) CHLIST04( 4, C, L, R, Cs ) CHLIST05( 5, C, L, R, Ls, Rs ) CHLIST06( 6, C, L, R, Ls, Rs, LFE ) CHLIST08( 7, C, Lc, Rc, L, R, Ls, Rs, LFE ) CHLIST03( 9, L, R, Cs ) CHLIST04( 10, L, R, Ls, Rs ) CHLIST07( 11, C, L, R, Ls, Rs, Cs, LFE ) CHLIST08( 12, C, L, R, Ls, Rs, Lsr, Rsr, LFE ) CHLIST24( 13, C, Lc, Rc, L, R, Lss, Rss, Lsr, Rsr, Cs, LFE, LFE2, Cv, Lv, Rv, Lvss, Rvss, Ts, Lvr, Rvr, Cvr, Cb, Lb, Rb) CHLIST08( 14, C, L, R, Ls, Rs, LFE, Lv, Rv) { {0} }, }; 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, 0, }; 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 }, }; static const struct MovChannelLayoutMap* find_layout_map(uint32_t tag, const struct MovChannelLayoutMap *map) { for (int i = 0; map[i].tag & 0xffff; i += 1 + (map[i].tag & 0xffff)) if (map[i].tag == tag) return &map[i + 1]; return NULL; } /** * Get the channel layout for the specified non-special channel layout tag if * known. * * @param[in,out] ch_layout channel layout * @param[in] tag channel layout tag * @return <0 on error */ static int mov_get_channel_layout(AVChannelLayout *ch_layout, uint32_t tag, uint64_t omitted_channel_map, const struct MovChannelLayoutMap *map) { const struct MovChannelLayoutMap *layout_map; /* find the channel layout for the specified layout tag */ layout_map = find_layout_map(tag, map); if (layout_map) { int ret; int map_layout_nb_channels = tag & 0xFFFF; int nb_channels = ch_layout->nb_channels; /* Omitted channel bits must not exceed number of channels in map */ if (omitted_channel_map >> map_layout_nb_channels) return AVERROR_INVALIDDATA; av_channel_layout_uninit(ch_layout); ret = av_channel_layout_custom_init(ch_layout, nb_channels); if (ret < 0) return ret; for (int i = 0, idx = 0; i < map_layout_nb_channels && idx < nb_channels; i++, omitted_channel_map >>= 1) { if (!(omitted_channel_map & 1)) { enum AVChannel id = layout_map[i].id; ch_layout->u.map[idx++].id = (id != AV_CHAN_NONE ? id : AV_CHAN_UNKNOWN); } } return av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL); } return 0; } static enum AVChannel mov_get_channel_id(uint32_t label) { if (label == 0) return AV_CHAN_UNUSED; if (label <= 18) return (label - 1); if (label == 35) return AV_CHAN_WIDE_LEFT; if (label == 36) return AV_CHAN_WIDE_RIGHT; if (label == 37) return AV_CHAN_LOW_FREQUENCY_2; if (label == 38) return AV_CHAN_STEREO_LEFT; if (label == 39) return AV_CHAN_STEREO_RIGHT; return AV_CHAN_UNKNOWN; } static uint32_t mov_get_channel_label(enum AVChannel channel) { if (channel < 0) return 0; if (channel <= AV_CHAN_TOP_BACK_RIGHT) return channel + 1; if (channel == AV_CHAN_WIDE_LEFT) return 35; if (channel == AV_CHAN_WIDE_RIGHT) return 36; if (channel == AV_CHAN_LOW_FREQUENCY_2) return 37; if (channel == AV_CHAN_STEREO_LEFT) return 38; if (channel == AV_CHAN_STEREO_RIGHT) return 39; return 0; } static int is_layout_valid_for_tag(const AVChannelLayout *ch_layout, uint32_t tag, const struct MovChannelLayoutMap *map) { const struct MovChannelLayoutMap *layout_map; int channels = ch_layout->nb_channels; /* get the layout map based on the channel count */ if ((tag & 0xFFFF) != channels) return 0; layout_map = find_layout_map(tag, map); if (layout_map) { int i; for (i = 0; i < channels; i++) { if (av_channel_layout_channel_from_index(ch_layout, i) != layout_map[i].id) break; } if (i == channels) return 1; } return 0; } int ff_mov_get_channel_layout_tag(const AVCodecParameters *par, uint32_t *layout, uint32_t *bitmap, uint32_t **pchannel_desc) { int i; 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 == par->codec_id) break; } if (mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE) layouts = mov_codec_ch_layouts[i].layouts; if (layouts) { /* find the layout tag for the specified channel layout */ for (i = 0; layouts[i] != 0; i++) if (is_layout_valid_for_tag(&par->ch_layout, layouts[i], mov_ch_layout_map)) break; tag = layouts[i]; } *layout = tag; *bitmap = 0; *pchannel_desc = NULL; /* if no tag was found, use channel bitmap or description as a backup if possible */ if (tag == 0) { uint32_t *channel_desc; if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE && par->ch_layout.u.mask < 0x40000) { *layout = MOV_CH_LAYOUT_USE_BITMAP; *bitmap = (uint32_t)par->ch_layout.u.mask; return 0; } else if (par->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) return AVERROR(ENOSYS); channel_desc = av_malloc_array(par->ch_layout.nb_channels, sizeof(*channel_desc)); if (!channel_desc) return AVERROR(ENOMEM); for (i = 0; i < par->ch_layout.nb_channels; i++) { channel_desc[i] = mov_get_channel_label(av_channel_layout_channel_from_index(&par->ch_layout, i)); if (channel_desc[i] == 0) { av_free(channel_desc); return AVERROR(ENOSYS); } } *pchannel_desc = channel_desc; } return 0; } int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size) { uint32_t layout_tag, bitmap, num_descr; int ret; AVChannelLayout *ch_layout = &st->codecpar->ch_layout; 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_DEBUG, "chan: layout=%"PRIu32" " "bitmap=%"PRIu32" num_descr=%"PRIu32"\n", layout_tag, bitmap, num_descr); if (size < 12ULL + num_descr * 20ULL) return 0; if (layout_tag == MOV_CH_LAYOUT_USE_DESCRIPTIONS) { int nb_channels = ch_layout->nb_channels; if (!num_descr || num_descr < nb_channels) { av_log(s, AV_LOG_ERROR, "got %d channel descriptions when at least %d were needed\n", num_descr, nb_channels); return AVERROR_INVALIDDATA; } if (num_descr > nb_channels) { int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT; av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING, "got %d channel descriptions when number of channels is %d\n", num_descr, nb_channels); if (strict) return AVERROR_INVALIDDATA; av_log(s, AV_LOG_WARNING, "capping channel descriptions to the number of channels\n"); num_descr = nb_channels; } av_channel_layout_uninit(ch_layout); ret = av_channel_layout_custom_init(ch_layout, nb_channels); if (ret < 0) goto out; for (int 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] size -= 20; ch_layout->u.map[i].id = mov_get_channel_id(label); } ret = av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL); if (ret < 0) goto out; } else if (layout_tag == MOV_CH_LAYOUT_USE_BITMAP) { if (!ch_layout->nb_channels || av_popcount(bitmap) == ch_layout->nb_channels) { if (bitmap < 0x40000) { av_channel_layout_uninit(ch_layout); av_channel_layout_from_mask(ch_layout, bitmap); } } else { av_log(s, AV_LOG_WARNING, "ignoring channel layout bitmap with %d channels because number of channels is %d\n", av_popcount64(bitmap), ch_layout->nb_channels); } } else if (layout_tag & 0xFFFF) { int nb_channels = layout_tag & 0xFFFF; if (!ch_layout->nb_channels) ch_layout->nb_channels = nb_channels; if (nb_channels == ch_layout->nb_channels) { ret = mov_get_channel_layout(ch_layout, layout_tag, 0, mov_ch_layout_map); if (ret < 0) return ret; } else { av_log(s, AV_LOG_WARNING, "ignoring layout tag with %d channels because number of channels is %d\n", nb_channels, ch_layout->nb_channels); } } ret = 0; out: avio_skip(pb, size - 12); return ret; } /* ISO/IEC 23001-8, table 8 */ static const enum AVChannel iso_channel_position[] = { [0] = AV_CHAN_FRONT_LEFT, // left front [1] = AV_CHAN_FRONT_RIGHT, // right front [2] = AV_CHAN_FRONT_CENTER, // centre front [3] = AV_CHAN_LOW_FREQUENCY, // low frequency enhancement [4] = AV_CHAN_SIDE_LEFT, // left surround [5] = AV_CHAN_SIDE_RIGHT, // right surround [6] = AV_CHAN_FRONT_LEFT_OF_CENTER, // left front centre [7] = AV_CHAN_FRONT_RIGHT_OF_CENTER, // right front centre [8] = AV_CHAN_BACK_LEFT, // rear surround left [9] = AV_CHAN_BACK_RIGHT, // rear surround right [10] = AV_CHAN_BACK_CENTER, // rear centre [11] = AV_CHAN_SURROUND_DIRECT_LEFT, // left surround direct [12] = AV_CHAN_SURROUND_DIRECT_RIGHT, // right surround direct [13] = AV_CHAN_SIDE_SURROUND_LEFT, // left side surround [14] = AV_CHAN_SIDE_SURROUND_RIGHT, // right side surround [15] = AV_CHAN_WIDE_LEFT, // left wide front [16] = AV_CHAN_WIDE_RIGHT, // right wide front [17] = AV_CHAN_TOP_FRONT_LEFT, // left front vertical height [18] = AV_CHAN_TOP_FRONT_RIGHT, // right front vertical height [19] = AV_CHAN_TOP_FRONT_CENTER, // centre front vertical height [20] = AV_CHAN_TOP_BACK_LEFT, // left surround vertical height rear [21] = AV_CHAN_TOP_BACK_RIGHT, // right surround vertical height rear [22] = AV_CHAN_TOP_BACK_CENTER, // centre vertical height rear [23] = AV_CHAN_TOP_SIDE_LEFT, // left vertical height side surround [24] = AV_CHAN_TOP_SIDE_RIGHT, // right vertical height side surround [25] = AV_CHAN_TOP_CENTER, // top centre surround [26] = AV_CHAN_LOW_FREQUENCY_2, // low frequency enhancement 2 [27] = AV_CHAN_BOTTOM_FRONT_LEFT, // left front vertical bottom [28] = AV_CHAN_BOTTOM_FRONT_RIGHT, // right front vertical bottom [29] = AV_CHAN_BOTTOM_FRONT_CENTER, // centre front vertical bottom [30] = AV_CHAN_TOP_SURROUND_LEFT, // left vertical height surround [31] = AV_CHAN_TOP_SURROUND_RIGHT, // right vertical height surround [32] = AV_CHAN_NONE, // reserved [33] = AV_CHAN_NONE, // reserved [34] = AV_CHAN_NONE, // reserved [35] = AV_CHAN_NONE, // reserved [36] = AV_CHAN_NONE, // low frequency enhancement 3 [37] = AV_CHAN_NONE, // left edge of screen [38] = AV_CHAN_NONE, // right edge of screen [39] = AV_CHAN_NONE, // half-way between centre of screen and left edge of screen [40] = AV_CHAN_NONE, // half-way between centre of screen and right edge of screen [41] = AV_CHAN_NONE, // left back surround [42] = AV_CHAN_NONE, // right back surround // 43 - 125: reserved // 126: explicit position // 127: unknown /undefined }; int ff_mov_get_channel_config_from_layout(const AVChannelLayout *layout, int *config) { // Set default value which means any setup in 23001-8 *config = 0; for (int i = 0; iso_ch_layout_map[i].tag & 0xffff; i += 1 + (iso_ch_layout_map[i].tag & 0xffff)) { if (is_layout_valid_for_tag(layout, iso_ch_layout_map[i].tag, &iso_ch_layout_map[i])) { *config = iso_ch_layout_map[i].tag >> 16; break; } } return 0; } int ff_mov_get_channel_layout_from_config(int config, AVChannelLayout *layout, uint64_t omitted_channel_map) { if (config > 0) { uint32_t layout_tag; int nb_omitted_channels = av_popcount64(omitted_channel_map); if (layout->nb_channels <= 0 || layout->nb_channels > UINT16_MAX - nb_omitted_channels) return AVERROR_INVALIDDATA; layout_tag = (config << 16) | (layout->nb_channels + nb_omitted_channels); return mov_get_channel_layout(layout, layout_tag, omitted_channel_map, iso_ch_layout_map); } return 1; } int ff_mov_get_channel_positions_from_layout(const AVChannelLayout *layout, uint8_t *position, int position_num) { enum AVChannel channel; if (position_num < layout->nb_channels) return AVERROR(EINVAL); for (int i = 0; i < layout->nb_channels; i++) { position[i] = 127; channel = av_channel_layout_channel_from_index(layout, i); if (channel == AV_CHAN_NONE) return AVERROR(EINVAL); for (int j = 0; j < FF_ARRAY_ELEMS(iso_channel_position); j++) { if (iso_channel_position[j] == channel) { position[i] = j; break; } } if (position[i] == 127) return AVERROR(EINVAL); } return 0; } int ff_mov_read_chnl(AVFormatContext *s, AVIOContext *pb, AVStream *st) { int stream_structure = avio_r8(pb); int ret; // stream carries channels if (stream_structure & 1) { int layout = avio_r8(pb); av_log(s, AV_LOG_TRACE, "'chnl' layout %d\n", layout); if (!layout) { AVChannelLayout *ch_layout = &st->codecpar->ch_layout; int nb_channels = ch_layout->nb_channels; av_channel_layout_uninit(ch_layout); ret = av_channel_layout_custom_init(ch_layout, nb_channels); if (ret < 0) return ret; for (int i = 0; i < nb_channels; i++) { int speaker_pos = avio_r8(pb); enum AVChannel channel; if (speaker_pos == 126) // explicit position avio_skip(pb, 3); // azimuth, elevation if (speaker_pos >= FF_ARRAY_ELEMS(iso_channel_position)) channel = AV_CHAN_NONE; else channel = iso_channel_position[speaker_pos]; if (channel == AV_CHAN_NONE) { av_log(s, AV_LOG_WARNING, "speaker position %d is not implemented\n", speaker_pos); channel = AV_CHAN_UNKNOWN; } ch_layout->u.map[i].id = channel; } ret = av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL); if (ret < 0) return ret; } else { uint64_t omitted_channel_map = avio_rb64(pb); ret = ff_mov_get_channel_layout_from_config(layout, &st->codecpar->ch_layout, omitted_channel_map); if (ret < 0) return ret; } } // stream carries objects if (stream_structure & 2) { int obj_count = avio_r8(pb); av_log(s, AV_LOG_TRACE, "'chnl' with object_count %d\n", obj_count); } return 0; }