Re: [FFmpeg-devel] [PATCH v2] avfilter/vpp_qsv: fix regression on older api versions (e.g. 1.11)

["Xiang, Haihao" <haihao.xiang-at-intel.com@ffmpeg.org>]

On Sun, 2022-01-02 at 03:41 +0000, ffmpegagent wrote:
> From: softworkz <softworkz@hotmail.com>
> 
> Commit 8b83dad82512a6948b63408f964463b063ad24c9 introduced a
> regression in a way that scaling via vpp_qsv doesn't work any longer
> for devices with an MSDK runtime version lower than 1.19. This is true
> for older CPUs which are stuck at 1.11.
> The commit added checks for the compile-sdk version but it didn't test
> for the runtime version.
> 
> Signed-off-by: softworkz <softworkz@hotmail.com>
> ---
>     avfilter/vpp_qsv: fix regression on older api versions (e.g. 1.11)
>     
>     Fix a recently introduced regression when using QSV VPP.
>     
>     v2: Fixed commit message wrapping
> 
> Published-As: 
> https://github.com/ffstaging/FFmpeg/releases/tag/pr-ffstaging-15%2Fsoftworkz%2Fqsv_vpp_regression-v2
> Fetch-It-Via: git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-
> 15/softworkz/qsv_vpp_regression-v2
> Pull-Request: https://github.com/ffstaging/FFmpeg/pull/15
> 
> Range-diff vs v1:
> 
>  1:  eea966f702 ! 1:  ccede9d840 avfilter/vpp_qsv: fix regression on older api
> versions (e.g. 1.11)
>      @@ Metadata
>        ## Commit message ##
>           avfilter/vpp_qsv: fix regression on older api versions (e.g. 1.11)
>       
>      -    Commit 8b83dad82512a6948b63408f964463b063ad24c9 introduced a
> regression in a way
>      -    that scaling via vpp_qsv didn't work any longer for devices with an
> MSDK runtime
>      -    version lower than 1.19. This is true for older CPUs which are stuck
> at 1.11.
>      -    The commit added checks for the compile-sdk version but it didn't
> test for the
>      -    runtime version.
>      +    Commit 8b83dad82512a6948b63408f964463b063ad24c9 introduced a
>      +    regression in a way that scaling via vpp_qsv doesn't work any longer
>      +    for devices with an MSDK runtime version lower than 1.19. This is
> true
>      +    for older CPUs which are stuck at 1.11.
>      +    The commit added checks for the compile-sdk version but it didn't
> test
>      +    for the runtime version.
>       
>           Signed-off-by: softworkz <softworkz@hotmail.com>
>       
> 
> 
>  libavfilter/vf_vpp_qsv.c | 32 ++++++++++++++++++++------------
>  1 file changed, 20 insertions(+), 12 deletions(-)
> 
> diff --git a/libavfilter/vf_vpp_qsv.c b/libavfilter/vf_vpp_qsv.c
> index ab58a5777e..09590157e3 100644
> --- a/libavfilter/vf_vpp_qsv.c
> +++ b/libavfilter/vf_vpp_qsv.c
> @@ -139,8 +139,9 @@ static const AVOption options[] = {
>      { "height", "Output video height", OFFSET(oh), AV_OPT_TYPE_STRING, {
> .str="w*ch/cw" }, 0, 255, .flags = FLAGS },
>      { "format", "Output pixel format", OFFSET(output_format_str),
> AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },
>      { "async_depth", "Internal parallelization depth, the higher the value
> the higher the latency.", OFFSET(async_depth), AV_OPT_TYPE_INT, { .i64 = 0 },
> 0, INT_MAX, .flags = FLAGS },
> +#ifdef QSV_HAVE_SCALING_CONFIG
>      { "scale_mode", "scale mode: 0=auto, 1=low power, 2=high quality",
> OFFSET(scale_mode), AV_OPT_TYPE_INT, { .i64 = MFX_SCALING_MODE_DEFAULT },
> MFX_SCALING_MODE_DEFAULT, MFX_SCALING_MODE_QUALITY, .flags = FLAGS, "scale
> mode" },
> -
> +#endif
>      { NULL }
>  };
>  
> @@ -304,6 +305,7 @@ static int config_output(AVFilterLink *outlink)
>      QSVVPPParam     param = { NULL };
>      QSVVPPCrop      crop  = { 0 };
>      mfxExtBuffer    *ext_buf[ENH_FILTERS_COUNT];
> +    mfxVersion      mfx_version;
>      AVFilterLink    *inlink = ctx->inputs[0];
>      enum AVPixelFormat in_format;
>  
> @@ -317,6 +319,11 @@ static int config_output(AVFilterLink *outlink)
>      param.ext_buf       = ext_buf;
>      param.async_depth   = vpp->async_depth;
>  
> +    if (MFXQueryVersion(vpp->qsv->session, &mfx_version) < 0) {

It resulted in segmentation fault in testing because vpp->qsv is NULL here. Note
vpp->qsv is set in ff_qsvvpp_create.

Thanks
Haihao


> +        av_log(ctx, AV_LOG_ERROR, "Failed to query mfx version.\n");
> +        return AVERROR(EINVAL);
> +    }
> +
>      if (inlink->format == AV_PIX_FMT_QSV) {
>           if (!inlink->hw_frames_ctx || !inlink->hw_frames_ctx->data)
>               return AVERROR(EINVAL);
> @@ -467,19 +474,20 @@ static int config_output(AVFilterLink *outlink)
>  #endif
>      }
>  
> -    if (inlink->w != outlink->w || inlink->h != outlink->h) {
>  #ifdef QSV_HAVE_SCALING_CONFIG
> -        memset(&vpp->scale_conf, 0, sizeof(mfxExtVPPScaling));
> -        vpp->scale_conf.Header.BufferId    = MFX_EXTBUFF_VPP_SCALING;
> -        vpp->scale_conf.Header.BufferSz    = sizeof(mfxExtVPPScaling);
> -        vpp->scale_conf.ScalingMode        = vpp->scale_mode;
> -
> -        param.ext_buf[param.num_ext_buf++] = (mfxExtBuffer*)&vpp->scale_conf;
> -#else
> -        av_log(ctx, AV_LOG_WARNING, "The QSV VPP Scale option is "
> -            "not supported with this MSDK version.\n");
> -#endif
> +    if (inlink->w != outlink->w || inlink->h != outlink->h) {
> +        if (QSV_RUNTIME_VERSION_ATLEAST(mfx_version, 1, 19)) {
> +            memset(&vpp->scale_conf, 0, sizeof(mfxExtVPPScaling));
> +            vpp->scale_conf.Header.BufferId    = MFX_EXTBUFF_VPP_SCALING;
> +            vpp->scale_conf.Header.BufferSz    = sizeof(mfxExtVPPScaling);
> +            vpp->scale_conf.ScalingMode        = vpp->scale_mode;
> +
> +            param.ext_buf[param.num_ext_buf++] = (mfxExtBuffer*)&vpp-
> >scale_conf;
> +        } else
> +            av_log(ctx, AV_LOG_WARNING, "The QSV VPP Scale option is "
> +                "not supported with this MSDK version.\n");
>      }
> +#endif
>  
>      if (vpp->use_frc || vpp->use_crop || vpp->deinterlace || vpp->denoise ||
>          vpp->detail || vpp->procamp || vpp->rotate || vpp->hflip ||
> 
> base-commit: d6b2357eddca392ee137cb2a92ff178a0a7d0cce
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