[FFmpeg-devel] [PATCH V4 4/4] lavc/vaapi_encode_h265: respect "slices" option in h265 vaapi encoder

[Jun Zhao]

On 2017/8/23 19:12, Steven Liu wrote:
> 2017-08-23 18:34 GMT+08:00 Jun Zhao <mypopydev at gmail.com>:
> >From dae9051c0828f7c86417308d06f1deb0640534bc Mon Sep 17 00:00:00 2001
> From: Jun Zhao <jun.zhao at intel.com>
> Date: Tue, 1 Aug 2017 23:07:34 -0400
> Subject: [PATCH V4 4/4] lavc/vaapi_encode_h265: respect "slices" option in
>  h265 vaapi encoder
>
> Enable multi-slice support in AVC/H.265 vaapi encoder.
>
> Signed-off-by: Wang, Yi A <yi.a.wang at intel.com>
> Signed-off-by: Jun Zhao <jun.zhao at intel.com>
> ---
>  libavcodec/vaapi_encode_h265.c | 36 ++++++++++++++++++++++++++++++------
>  1 file changed, 30 insertions(+), 6 deletions(-)
>
> diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
> index cf6b9388d1..e27b554a98 100644
> --- a/libavcodec/vaapi_encode_h265.c
> +++ b/libavcodec/vaapi_encode_h265.c
> @@ -176,6 +176,8 @@ typedef struct VAAPIEncodeH265Context {
>      unsigned int ctu_width;
>      unsigned int ctu_height;
>
> +    int last_ctu_index;
> +
>      int fixed_qp_idr;
>      int fixed_qp_p;
>      int fixed_qp_b;
> @@ -962,6 +964,7 @@ static int
> vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
>      VAEncPictureParameterBufferHEVC *vpic = pic->codec_picture_params;
>      VAAPIEncodeH265Context          *priv = ctx->priv_data;
>      int i;
> +    int slices;
>
>      if (pic->type == PICTURE_TYPE_IDR) {
>          av_assert0(pic->display_order == pic->encode_order);
> @@ -1024,7 +1027,19 @@ static int
> vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
>          av_assert0(0 && "invalid picture type");
>      }
>
> -    pic->nb_slices = 1;
> +    slices = 1;
> +    if (ctx->max_slices) {
> +        if (avctx->slices <= ctx->max_slices) {
> +            slices = avctx->slices;
> +        } else {
> +            slices = avctx->slices;
>
>
> What about move this "slices = avctx->slices;" out of the conditional ?
I think it need to return a error in this "else" and follow h264_vaapi
enc manner.
Will re-send this patch.
>
>
> +            av_log(avctx, AV_LOG_WARNING, "The max slices number per frame "
> +                   "cannot more than %d.\n", slices);
> +        }
> +    }
> +    pic->nb_slices = slices;
> +
> +    priv->last_ctu_index = 0;
>
>      return 0;
>  }
> @@ -1047,9 +1062,10 @@ static int
> vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
>      pslice = slice->priv_data;
>      mslice = &pslice->misc_slice_params;
>
> -    // Currently we only support one slice per frame.
> -    vslice->slice_segment_address = 0;
> -    vslice->num_ctu_in_slice = priv->ctu_width * priv->ctu_height;
> +    vslice->slice_segment_address = priv->last_ctu_index;
> +    vslice->num_ctu_in_slice =
> +        ((slice->index + 1) * priv->ctu_width * priv->ctu_height) /
> pic->nb_slices - priv->last_ctu_index;
> +    priv->last_ctu_index += vslice->num_ctu_in_slice;
>
>      switch (pic->type) {
>      case PICTURE_TYPE_IDR:
> @@ -1103,9 +1119,13 @@ static int
> vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
>      else
>          vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
>
> -    vslice->slice_fields.bits.last_slice_of_pic_flag = 1;
> +    if (priv->last_ctu_index == priv->ctu_width * priv->ctu_height)
> +        vslice->slice_fields.bits.last_slice_of_pic_flag = 1;
>
> -    mslice->first_slice_segment_in_pic_flag = 1;
> +    if (vslice->slice_segment_address == 0)
> +        mslice->first_slice_segment_in_pic_flag = 1;
> +    else
> +        mslice->first_slice_segment_in_pic_flag = 0;
>
>
> What about:
> mslice->first_slice_segment_in_pic_flag = vslice->slice_segment_address ? 0 : 1;
> ?
Ok
>
>      if (pic->type == PICTURE_TYPE_IDR) {
>          // No reference pictures.
> @@ -1198,6 +1218,10 @@ static av_cold int
> vaapi_encode_h265_configure(AVCodecContext *avctx)
>          av_assert0(0 && "Invalid RC mode.");
>      }
>
> +    if (!ctx->max_slices && avctx->slices > 0)
> +        av_log(avctx, AV_LOG_WARNING, "The encode slice option is not "
> +               "supported with the driver.\n");
> +
>      return 0;
>  }
>