[FFmpeg-devel] [PATCH] avutil/channel_layout: add a cube channel layout
Paul B Mahol
onemda at gmail.com
Sun Oct 30 20:20:12 EET 2022
On 10/30/22, James Almer <jamrial at gmail.com> wrote:
>
>
> On 10/30/2022 1:19 PM, Andreas Rheinhardt wrote:
>> James Almer:
>>> Signed-off-by: James Almer <jamrial at gmail.com>
>>> ---
>>> doc/APIchanges | 3 +++
>>> doc/utils.texi | 2 ++
>>> libavutil/channel_layout.c | 1 +
>>> libavutil/channel_layout.h | 2 ++
>>> tests/ref/fate/channel_layout | 1 +
>>> 5 files changed, 9 insertions(+)
>>>
>>> diff --git a/doc/APIchanges b/doc/APIchanges
>>> index 5807bf8069..5aca1d1b5f 100644
>>> --- a/doc/APIchanges
>>> +++ b/doc/APIchanges
>>> @@ -14,6 +14,9 @@ libavutil: 2021-04-27
>>>
>>> API changes, most recent first:
>>>
>>> +2022-10-xx - xxxxxxxxxx - lavu 57.xx.xxx - channel_layout.h
>>> + Add AV_CH_LAYOUT_CUBE and AV_CHANNEL_LAYOUT_CUBE.
>>> +
>>> 2022-10-11 - xxxxxxxxxx - lavu 57.39.101 - pixfmt.h
>>> Add AV_PIX_FMT_RGBF32 and AV_PIX_FMT_RGBAF32.
>>>
>>> diff --git a/doc/utils.texi b/doc/utils.texi
>>> index 627b55d154..907a6b87cb 100644
>>> --- a/doc/utils.texi
>>> +++ b/doc/utils.texi
>>> @@ -715,6 +715,8 @@ FL+FR+FC+LFE+BL+BR+FLC+FRC
>>> FL+FR+FC+LFE+FLC+FRC+SL+SR
>>> @item octagonal
>>> FL+FR+FC+BL+BR+BC+SL+SR
>>> + at item cube
>>> +FL+FR+BL+BR+TFL+TFR+TBL+TBR
>>> @item hexadecagonal
>>> FL+FR+FC+BL+BR+BC+SL+SR+WL+WR+TBL+TBR+TBC+TFC+TFL+TFR
>>> @item downmix
>>> diff --git a/libavutil/channel_layout.c b/libavutil/channel_layout.c
>>> index 21b70173b7..5af7ea0e01 100644
>>> --- a/libavutil/channel_layout.c
>>> +++ b/libavutil/channel_layout.c
>>> @@ -197,6 +197,7 @@ static const struct channel_layout_name
>>> channel_layout_map[] = {
>>> { "7.1(wide)", AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK },
>>> { "7.1(wide-side)", AV_CHANNEL_LAYOUT_7POINT1_WIDE },
>>> { "octagonal", AV_CHANNEL_LAYOUT_OCTAGONAL },
>>> + { "cube", AV_CHANNEL_LAYOUT_CUBE },
>>> { "hexadecagonal", AV_CHANNEL_LAYOUT_HEXADECAGONAL },
>>> { "downmix", AV_CHANNEL_LAYOUT_STEREO_DOWNMIX, },
>>> { "22.2", AV_CHANNEL_LAYOUT_22POINT2, },
>>> diff --git a/libavutil/channel_layout.h b/libavutil/channel_layout.h
>>> index 059ff70841..3e69163360 100644
>>> --- a/libavutil/channel_layout.h
>>> +++ b/libavutil/channel_layout.h
>>> @@ -233,6 +233,7 @@ enum AVChannelOrder {
>>> #define AV_CH_LAYOUT_7POINT1_WIDE
>>> (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
>>> #define AV_CH_LAYOUT_7POINT1_WIDE_BACK
>>> (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
>>> #define AV_CH_LAYOUT_OCTAGONAL
>>> (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
>>> +#define AV_CH_LAYOUT_CUBE
>>> (AV_CH_LAYOUT_QUAD|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
>>> #define AV_CH_LAYOUT_HEXADECAGONAL
>>> (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
>>> #define AV_CH_LAYOUT_STEREO_DOWNMIX
>>> (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
>>> #define AV_CH_LAYOUT_22POINT2
>>> (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
>>> @@ -389,6 +390,7 @@ typedef struct AVChannelLayout {
>>> #define AV_CHANNEL_LAYOUT_7POINT1_WIDE AV_CHANNEL_LAYOUT_MASK(8,
>>> AV_CH_LAYOUT_7POINT1_WIDE)
>>> #define AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK AV_CHANNEL_LAYOUT_MASK(8,
>>> AV_CH_LAYOUT_7POINT1_WIDE_BACK)
>>> #define AV_CHANNEL_LAYOUT_OCTAGONAL AV_CHANNEL_LAYOUT_MASK(8,
>>> AV_CH_LAYOUT_OCTAGONAL)
>>> +#define AV_CHANNEL_LAYOUT_CUBE AV_CHANNEL_LAYOUT_MASK(8,
>>> AV_CH_LAYOUT_CUBE)
>>> #define AV_CHANNEL_LAYOUT_HEXADECAGONAL AV_CHANNEL_LAYOUT_MASK(16,
>>> AV_CH_LAYOUT_HEXADECAGONAL)
>>> #define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX AV_CHANNEL_LAYOUT_MASK(2,
>>> AV_CH_LAYOUT_STEREO_DOWNMIX)
>>> #define AV_CHANNEL_LAYOUT_22POINT2 AV_CHANNEL_LAYOUT_MASK(24,
>>> AV_CH_LAYOUT_22POINT2)
>>> diff --git a/tests/ref/fate/channel_layout
>>> b/tests/ref/fate/channel_layout
>>> index 19bcbce7d8..02eaad0929 100644
>>> --- a/tests/ref/fate/channel_layout
>>> +++ b/tests/ref/fate/channel_layout
>>> @@ -25,6 +25,7 @@ hexagonal FL+FR+FC+BL+BR+BC
>>> 7.1(wide) FL+FR+FC+LFE+BL+BR+FLC+FRC
>>> 7.1(wide-side) FL+FR+FC+LFE+FLC+FRC+SL+SR
>>> octagonal FL+FR+FC+BL+BR+BC+SL+SR
>>> +cube FL+FR+BL+BR+TFL+TFR+TBL+TBR
>>> hexadecagonal FL+FR+FC+BL+BR+BC+SL+SR+TFL+TFC+TFR+TBL+TBC+TBR+WL+WR
>>> downmix DL+DR
>>> 22.2
>>> FL+FR+FC+LFE+BL+BR+FLC+FRC+BC+SL+SR+TC+TFL+TFC+TFR+TBL+TBC+TBR+LFE2+TSL+TSR+BFC+BFL+BFR
>>
>> Is this a common name or is this something you made up?
>
> It's the same as kAudioChannelLayoutTag_Cube from AudioChannelLayoutTag
> as defined by Apple and used in mov (see MOV_CH_LAYOUT_CUBE in lavf
> mov_chan.c).
Yes, but that is not same as CUBE as used in ambisonics iiuc.
>
>>
>> - Andreas
>>
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>>
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