[FFmpeg-devel] [PATCH V3] Patch to add interlaced HEVC decoding to HEVCDEC

[Michael Niedermayer]

On Wed, Oct 30, 2024 at 01:31:35PM -0500, Jose Santiago wrote:
>  From d55b49766d5e0256685c4874568db002d3dd7889 Mon Sep 17 00:00:00 2001
> From: Jose Santiago <jsantiago at haivision.com>
> Date: Wed, 30 Oct 2024 12:28:35 -0500
> Subject: [PATCH] [PATCH V3] Patch to add interlaced HEVC decoding to
> HEVCDEC
> 
> ---
>   libavcodec/hevc/hevcdec.c |  24 ++-
>   libavcodec/hevc/hevcdec.h |  13 ++
>   libavcodec/hevc/refs.c    | 412 +++++++++++++++++++++++++++++++++++++-
>   libavcodec/hevc/sei.c     |  16 +-
>   libavcodec/hevc/sei.h     | 129 +++++++++++-
>   5 files changed, 569 insertions(+), 25 deletions(-)
> 
> diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c
> index 1ea8df0fa0..d7179bdcf7 100644
> --- a/libavcodec/hevc/hevcdec.c
> +++ b/libavcodec/hevc/hevcdec.c
> @@ -359,7 +359,18 @@ static void export_stream_params(HEVCContext *s,
> const HEVCSPS *sps)
>       avctx->profile             = sps->ptl.general_ptl.profile_idc;
>       avctx->level               = sps->ptl.general_ptl.level_idc;
> 
> -    ff_set_sar(avctx, sps->vui.common.sar);
> +    // There are some streams in the wild that were encode field pitcures
> +    //    and set double height aspect ratio so that some players that
> do not
> +    //    support interlaced HEVC display the field pictures with
> double height.
> +    // Since we are now combining the field pictures into a single
> interlaced
> +    //    frame, fix the sample aspect ratio to restore the correct
> shape for the
> +    //    reconstructed interlaced frames.
> +    if
> (ff_hevc_sei_pict_struct_is_field_picture(s->sei.picture_timing.picture_struct)
> &&
> +            sps->vui.common.sar.num == 1 && sps->vui.common.sar.den ==
> 2) {

this patch is corrupted by linebreaks, please check your word/line wrap settings

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

You can kill me, but you cannot change the truth.
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