From: Marton Balint <cus@passwd.hu>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] avformat/mov_chan: respect channel order when parsing and creating chan atom
Date: Mon, 18 Mar 2024 00:57:35 +0100 (CET)
Message-ID: <383e7f14-4393-47b9-c138-069b8357b832@passwd.hu> (raw)
In-Reply-To: <AS8P250MB0744113F5AC90B5A40973CC88F2E2@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM>
On Mon, 18 Mar 2024, Andreas Rheinhardt wrote:
> Marton Balint:
>> Previously we always assumed that the channels are in native order, even if
>> they were not. The new channel layout API allows us to signal the proper
>> channel order, so let's do so.
>>
>> Fixes ticket #98.
>> ---
>> libavformat/mov_chan.c | 464 +++++++++++++++++++----------------------
>> 1 file changed, 211 insertions(+), 253 deletions(-)
>>
>> diff --git a/libavformat/mov_chan.c b/libavformat/mov_chan.c
>> index ead3a9b91b..d48cfeabb0 100644
>> --- a/libavformat/mov_chan.c
>> +++ b/libavformat/mov_chan.c
>> @@ -25,228 +25,163 @@
>>
>> #include <stdint.h>
>>
>> +#include "libavutil/avassert.h"
>> #include "libavutil/channel_layout.h"
>> #include "libavcodec/codec_id.h"
>> #include "mov_chan.h"
>>
>> -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 },
>> +enum ShortChannelName {
>> + 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,
>> };
>>
>> -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_CUBE }, // L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt
>> -
>> - { 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 },
>> +struct MovChannelLayoutMap {
>> + union {
>> + uint32_t tag;
>> + enum AVChannel id;
>> + };
>> };
>>
>> -static const struct MovChannelLayoutMap * const 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,
>> +#define TAG(_0) (struct MovChannelLayoutMap){.tag = _0}
>> +#define ID(_0) (struct MovChannelLayoutMap){.id = c_##_0}
>
> Code like
>
> typedef struct Foo {
> int a;
> } Foo;
>
> Foo bar[] = {
> (Foo) {.a = 1},
> };
>
> is not valid C11 (or C17), because initializers for static objects are
> subject to severe restrictions; in particular, compound literals are not
> allowed. GCC and Clang ignore this except when using -pedantic, but MSVC
> does not: https://godbolt.org/z/hvnrh63za
> Just remove the "(MovChannelLayoutMap)".
Ok, will do, thanks.
Marton
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next prev parent reply other threads:[~2024-03-17 23:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-17 19:56 Marton Balint
2024-03-17 23:47 ` Andreas Rheinhardt
2024-03-17 23:57 ` Marton Balint [this message]
2024-03-23 11:17 ` Marton Balint
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