[FFmpeg-devel] [PATCH 1/3] lavfi/vpp_qsv: add rate option

[Xiang, Haihao]

On Ma, 2023-01-30 at 09:37 +0800, Xiang, Haihao wrote:
> From: Haihao Xiang <haihao.xiang at intel.com>
> 
> This is used to control the output at frame rate or field rate when
> deinterlace is expected and framerate is not specified.
> 
> Signed-off-by: Haihao Xiang <haihao.xiang at intel.com>
> ---
>  libavfilter/vf_vpp_qsv.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/libavfilter/vf_vpp_qsv.c b/libavfilter/vf_vpp_qsv.c
> index 34e530e244..aac0a234c3 100644
> --- a/libavfilter/vf_vpp_qsv.c
> +++ b/libavfilter/vf_vpp_qsv.c
> @@ -101,6 +101,7 @@ typedef struct VPPContext{
>      char *output_format_str;
>  
>      int has_passthrough;        /* apply pass through mode if possible */
> +    int field_rate;             /* Generate output at frame rate or field
> rate for deinterlace mode, 0: frame, 1: field */
>  } VPPContext;
>  
>  static const char *const var_names[] = {
> @@ -255,9 +256,14 @@ static int config_input(AVFilterLink *inlink)
>      int              ret;
>      int64_t          ow, oh;
>  
> -    if (vpp->framerate.den == 0 || vpp->framerate.num == 0)
> +    if (vpp->framerate.den == 0 || vpp->framerate.num == 0) {
>          vpp->framerate = inlink->frame_rate;
>  
> +        if (vpp->deinterlace && vpp->field_rate)
> +            vpp->framerate = av_mul_q(inlink->frame_rate,
> +                                      (AVRational){ 2, 1 });
> +    }
> +
>      if (av_cmp_q(vpp->framerate, inlink->frame_rate))
>          vpp->use_frc = 1;
>  
> @@ -352,7 +358,7 @@ static int config_output(AVFilterLink *outlink)
>      outlink->w          = vpp->out_width;
>      outlink->h          = vpp->out_height;
>      outlink->frame_rate = vpp->framerate;
> -    outlink->time_base  = inlink->time_base;
> +    outlink->time_base  = av_inv_q(vpp->framerate);
>  
>      param.filter_frame  = NULL;
>      param.num_ext_buf   = 0;
> @@ -678,6 +684,13 @@ static const AVOption vpp_options[] = {
>      { "low_power", "low power mode",        0,    AV_OPT_TYPE_CONST,  { .i64
> = MFX_SCALING_MODE_LOWPOWER}, INT_MIN, INT_MAX, FLAGS, "scale mode"},
>      { "hq",        "high quality mode",     0,    AV_OPT_TYPE_CONST,  { .i64
> = MFX_SCALING_MODE_QUALITY},  INT_MIN, INT_MAX, FLAGS, "scale mode"},
>  
> +    { "rate", "Generate output at frame rate or field rate, available only
> for deinterlace mode",
> +      OFFSET(field_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS, "rate"
> },
> +    { "frame", "Output at frame rate (one frame of output for each field-
> pair)",
> +      0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "rate" },
> +    { "field", "Output at field rate (one frame of output for each field)",
> +      0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "rate" },
> +
>      { NULL }
>  };

Will apply this patchset.

- Haihao
>