[FFmpeg-devel] [PATCH 02/10] avutil/stereo3d: add a Stereo3D type to signal that the packing is unspecified

[James Almer]

On 6/25/2024 3:30 PM, Vittorio Giovara wrote:
> On Sun, Jun 23, 2024 at 1:16 AM James Almer <jamrial at gmail.com> wrote:
> 
>> Given that a video stream/frame may have only one or both views coded with
>> the packing information being unavailable, this commit adds a new type
>> value
>> AV_STEREO3D_UNSPEC for this purpose.
>>
> 
> not to bikeshed the name, but why UNSPEC instead of UNKNOWN?

It's what was used in ch_layout, so i figured I'd use it here too.

> Vittorio
> 
> 
>> The most common case for this is container level signaling of Stereo3D
>> video
>> where the specifics are defined at the bitstream level.
>>
>> Signed-off-by: James Almer <jamrial at gmail.com>
>> ---
>>   libavutil/stereo3d.c | 1 +
>>   libavutil/stereo3d.h | 6 ++++++
>>   2 files changed, 7 insertions(+)
>>
>> diff --git a/libavutil/stereo3d.c b/libavutil/stereo3d.c
>> index 37cf093099..1f944e9cac 100644
>> --- a/libavutil/stereo3d.c
>> +++ b/libavutil/stereo3d.c
>> @@ -65,6 +65,7 @@ static const char * const stereo3d_type_names[] = {
>>       [AV_STEREO3D_SIDEBYSIDE_QUINCUNX] = "side by side (quincunx
>> subsampling)",
>>       [AV_STEREO3D_LINES]               = "interleaved lines",
>>       [AV_STEREO3D_COLUMNS]             = "interleaved columns",
>> +    [AV_STEREO3D_UNSPEC]              = "unspecified",
>>   };
>>
>>   static const char * const stereo3d_view_names[] = {
>> diff --git a/libavutil/stereo3d.h b/libavutil/stereo3d.h
>> index 9a004d88a1..deddecfb36 100644
>> --- a/libavutil/stereo3d.h
>> +++ b/libavutil/stereo3d.h
>> @@ -136,6 +136,12 @@ enum AVStereo3DType {
>>        * @endcode
>>        */
>>       AV_STEREO3D_COLUMNS,
>> +
>> +    /**
>> +     * Video may be monoscopic, or stereoscopic where the
>> +     * packing is unspecified.
>> +     */
>> +    AV_STEREO3D_UNSPEC,
>>   };
>>
>>   /**
>> --
>> 2.45.2
>>
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> 
>