[FFmpeg-devel] [PATCH] add yuv444p support to mcdeint

[Ethan Halsall]

Just a friendly follow up on this patch. I've attached the patch in case 
something else was wrong with the formatting with my previous reply.

Ethan

On 5/30/25 12:29 AM, Ethan Halsall wrote:
> On 5/29/25 7:58 PM, Michael Niedermayer wrote:
>> On Tue, May 27, 2025 at 01:24:57PM -0500, Ethan Halsall wrote:
>>> Signed-off-by: Ethan Halsall <ethanhalsall11 at augustana.edu>
>>> ---
>>>   libavfilter/vf_mcdeint.c | 32 ++++++++++++++++++++++++++++----
>>>   1 file changed, 28 insertions(+), 4 deletions(-)
>>>
>>
>> Applying: add yuv444p support to mcdeint
>> error: corrupt patch at line 18
>>
>> this patch is somehow corrupted, that above is not a valid diff
>> make sure the output of git format-patch is not modified
>>
>> thx
>>
>>
>> [...]
>>
> 
> I followed the instructions on the "Sending patches from email clients" 
> section of https://ffmpeg.org/developer.html#Submitting-patches-1. I 
> think Thunderbird removed some line breaks in the patch though when I 
> opened the .eml file.
> 
> Let's try this one:
> 
> 
> Signed-off-by: Ethan Halsall <ethanhalsall11 at augustana.edu>
> ---
>   libavfilter/vf_mcdeint.c | 32 ++++++++++++++++++++++++++++----
>   1 file changed, 28 insertions(+), 4 deletions(-)
> 
> diff --git a/libavfilter/vf_mcdeint.c b/libavfilter/vf_mcdeint.c
> index 82048b51d0..11ad19f5cd 100644
> --- a/libavfilter/vf_mcdeint.c
> +++ b/libavfilter/vf_mcdeint.c
> @@ -51,8 +51,10 @@
> 
>   #include "libavutil/opt.h"
>   #include "libavcodec/avcodec.h"
> +#include "libavutil/pixdesc.h"
>   #include "avfilter.h"
>   #include "filters.h"
> +#include "formats.h"
>   #include "video.h"
> 
>   enum MCDeintMode {
> @@ -76,6 +78,7 @@ typedef struct MCDeintContext {
>       AVPacket *pkt;
>       AVFrame *frame_dec;
>       AVCodecContext *enc_ctx;
> +    const AVPixFmtDescriptor *pix_fmt_desc;
>   } MCDeintContext;
> 
>   #define OFFSET(x) offsetof(MCDeintContext, x)
> @@ -99,6 +102,17 @@ static const AVOption mcdeint_options[] = {
> 
>   AVFILTER_DEFINE_CLASS(mcdeint);
> 
> +static const enum AVPixelFormat pix_fmts[] = {
> +    AV_PIX_FMT_YUV420P,
> +    AV_PIX_FMT_YUV444P,
> +    AV_PIX_FMT_NONE
> +};
> +
> +static int query_formats(AVFilterContext *ctx)
> +{
> +    return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
> +}
> +
>   static int config_props(AVFilterLink *inlink)
>   {
>       AVFilterContext *ctx = inlink->dst;
> @@ -122,13 +136,16 @@ static int config_props(AVFilterLink *inlink)
>       mcdeint->enc_ctx = avcodec_alloc_context3(enc);
>       if (!mcdeint->enc_ctx)
>           return AVERROR(ENOMEM);
> +    mcdeint->pix_fmt_desc = av_pix_fmt_desc_get(inlink->format);
> +    if (!mcdeint->pix_fmt_desc)
> +        return AVERROR(ENOMEM);
>       enc_ctx = mcdeint->enc_ctx;
>       enc_ctx->width  = inlink->w;
>       enc_ctx->height = inlink->h;
>       enc_ctx->time_base = (AVRational){1,25};  // meaningless
>       enc_ctx->gop_size = INT_MAX;
>       enc_ctx->max_b_frames = 0;
> -    enc_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
> +    enc_ctx->pix_fmt = inlink->format;
>       enc_ctx->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_LOW_DELAY | 
> AV_CODEC_FLAG_RECON_FRAME;
>       enc_ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
>       enc_ctx->global_quality = 1;
> @@ -201,8 +218,14 @@ static int filter_frame(AVFilterLink *inlink, 
> AVFrame *inpic)
> 
>       for (i = 0; i < 3; i++) {
>           int is_chroma = !!i;
> -        int w = AV_CEIL_RSHIFT(inlink->w, is_chroma);
> -        int h = AV_CEIL_RSHIFT(inlink->h, is_chroma);
> +        int w, h;
> +        if (is_chroma) {
> +            w = inlink->w >> mcdeint->pix_fmt_desc->log2_chroma_w;
> +            h = inlink->h >> mcdeint->pix_fmt_desc->log2_chroma_h;
> +        } else {
> +            w = inlink->w;
> +            h = inlink->h;
> +        }
>           int fils = frame_dec->linesize[i];
>           int srcs = inpic    ->linesize[i];
>           int dsts = outpic   ->linesize[i];
> @@ -307,5 +330,6 @@ const FFFilter ff_vf_mcdeint = {
>       .uninit        = uninit,
>       FILTER_INPUTS(mcdeint_inputs),
>       FILTER_OUTPUTS(ff_video_default_filterpad),
> -    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_YUV420P),
> +    FILTER_QUERY_FUNC(query_formats),
>   };
> +
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