[FFmpeg-devel,V1,1/2] lavfi/vf_scale_vaapi: add scaling mode setting support.

Submitted by Jun Zhao on Dec. 6, 2018, 10:39 a.m.

Details

Message ID 1544092798-4125-2-git-send-email-mypopydev@gmail.com
State Accepted
Headers show

Commit Message

Jun Zhao Dec. 6, 2018, 10:39 a.m.
before this change, scale_vaapi hard coding the scaling mode, add a
new option "mode" to setting the scaling mode, it can be use to change
scaling algorithm for performance/quality trade off.

Signed-off-by: Jun Zhao <mypopydev@gmail.com>
---
 libavfilter/vf_scale_vaapi.c |   33 ++++++++++++++++++++++++++++++---
 1 files changed, 30 insertions(+), 3 deletions(-)

Comments

Mark Thompson Dec. 9, 2018, 6:25 p.m.
On 06/12/2018 10:39, Jun Zhao wrote:
> before this change, scale_vaapi hard coding the scaling mode, add a
> new option "mode" to setting the scaling mode, it can be use to change
> scaling algorithm for performance/quality trade off.
> 
> Signed-off-by: Jun Zhao <mypopydev@gmail.com>
> ---
>  libavfilter/vf_scale_vaapi.c |   33 ++++++++++++++++++++++++++++++---
>  1 files changed, 30 insertions(+), 3 deletions(-)
> 
> diff --git a/libavfilter/vf_scale_vaapi.c b/libavfilter/vf_scale_vaapi.c
> index d6529d5..ad222e6 100644
> --- a/libavfilter/vf_scale_vaapi.c
> +++ b/libavfilter/vf_scale_vaapi.c
> @@ -35,10 +35,26 @@ typedef struct ScaleVAAPIContext {
>  
>      char *output_format_string;
>  
> +    int   mode;
> +
>      char *w_expr;      // width expression string
>      char *h_expr;      // height expression string
>  } ScaleVAAPIContext;
>  
> +static const char *scale_vaapi_mode_name(int mode)
> +{
> +    switch (mode) {
> +#define D(name) case VA_FILTER_SCALING_ ## name: return #name
> +        D(DEFAULT);
> +        D(FAST);
> +        D(HQ);
> +#undef D
> +    default:
> +        return "Invalid";
> +    }
> +}
> +
> +
>  static int scale_vaapi_config_output(AVFilterLink *outlink)
>  {
>      AVFilterLink *inlink     = outlink->src->inputs[0];
> @@ -70,6 +86,7 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
>      AVFilterContext *avctx   = inlink->dst;
>      AVFilterLink *outlink    = avctx->outputs[0];
>      VAAPIVPPContext *vpp_ctx = avctx->priv;
> +    ScaleVAAPIContext *ctx   = avctx->priv;
>      AVFrame *output_frame    = NULL;
>      VASurfaceID input_surface, output_surface;
>      VAProcPipelineParameterBuffer params;
> @@ -119,7 +136,7 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
>      params.output_color_standard = params.surface_color_standard;
>  
>      params.pipeline_flags = 0;
> -    params.filter_flags = VA_FILTER_SCALING_HQ;
> +    params.filter_flags |= ctx->mode;

"=" would feel safer - "|=" implies something else might have been setting it as well.

>  
>      err = ff_vaapi_vpp_render_picture(avctx, &params, output_surface);
>      if (err < 0)
> @@ -131,9 +148,10 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
>  
>      av_frame_free(&input_frame);
>  
> -    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
> +    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64"), mode: %s.\n",
>             av_get_pix_fmt_name(output_frame->format),
> -           output_frame->width, output_frame->height, output_frame->pts);
> +           output_frame->width, output_frame->height, output_frame->pts,
> +           scale_vaapi_mode_name(ctx->mode));
>  
>      return ff_filter_frame(outlink, output_frame);
>  
> @@ -174,6 +192,15 @@ static const AVOption scale_vaapi_options[] = {
>        OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags = FLAGS },
>      { "format", "Output video format (software format of hardware frames)",
>        OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags = FLAGS },
> +    { "mode", "Scaling mode",
> +      OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = VA_FILTER_SCALING_HQ },
> +      0, VA_FILTER_SCALING_NL_ANAMORPHIC, FLAGS, "mode" },

NL_ANAMORPHIC mentioned in this limit but not offered as an option?

> +    { "default", "Use the default (depend on the driver) scaling algorithm",
> +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_DEFAULT }, 0, 0, FLAGS, "mode" },
> +    { "fast", "Use fast scaling algorithm",
> +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_FAST }, 0, 0, FLAGS, "mode" },
> +    { "hq", "Use high quality scaling algorithm",
> +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_HQ }, 0, 0, FLAGS,  "mode" },
>      { NULL },
>  };
>  
> 

LGTM in any case.

(Ack on keeping the HQ default - IIRC the reason for choosing HQ as the mode when this was written was that the default/fast mode was not faster and had much worse quality on some of the older Intel platforms (I would guess Bay Trail based on what I probably had available at the time).  Might be worth investigating further if you have such machines available to test.)

Thanks,

- Mark
mypopy@gmail.com Dec. 10, 2018, 6:52 a.m.
now,
On Mon, Dec 10, 2018 at 2:25 AM Mark Thompson <sw@jkqxz.net> wrote:
>
> On 06/12/2018 10:39, Jun Zhao wrote:
> > before this change, scale_vaapi hard coding the scaling mode, add a
> > new option "mode" to setting the scaling mode, it can be use to change
> > scaling algorithm for performance/quality trade off.
> >
> > Signed-off-by: Jun Zhao <mypopydev@gmail.com>
> > ---
> >  libavfilter/vf_scale_vaapi.c |   33 ++++++++++++++++++++++++++++++---
> >  1 files changed, 30 insertions(+), 3 deletions(-)
> >
> > diff --git a/libavfilter/vf_scale_vaapi.c b/libavfilter/vf_scale_vaapi.c
> > index d6529d5..ad222e6 100644
> > --- a/libavfilter/vf_scale_vaapi.c
> > +++ b/libavfilter/vf_scale_vaapi.c
> > @@ -35,10 +35,26 @@ typedef struct ScaleVAAPIContext {
> >
> >      char *output_format_string;
> >
> > +    int   mode;
> > +
> >      char *w_expr;      // width expression string
> >      char *h_expr;      // height expression string
> >  } ScaleVAAPIContext;
> >
> > +static const char *scale_vaapi_mode_name(int mode)
> > +{
> > +    switch (mode) {
> > +#define D(name) case VA_FILTER_SCALING_ ## name: return #name
> > +        D(DEFAULT);
> > +        D(FAST);
> > +        D(HQ);
> > +#undef D
> > +    default:
> > +        return "Invalid";
> > +    }
> > +}
> > +
> > +
> >  static int scale_vaapi_config_output(AVFilterLink *outlink)
> >  {
> >      AVFilterLink *inlink     = outlink->src->inputs[0];
> > @@ -70,6 +86,7 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
> >      AVFilterContext *avctx   = inlink->dst;
> >      AVFilterLink *outlink    = avctx->outputs[0];
> >      VAAPIVPPContext *vpp_ctx = avctx->priv;
> > +    ScaleVAAPIContext *ctx   = avctx->priv;
> >      AVFrame *output_frame    = NULL;
> >      VASurfaceID input_surface, output_surface;
> >      VAProcPipelineParameterBuffer params;
> > @@ -119,7 +136,7 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
> >      params.output_color_standard = params. surface_color_standard;
> >
> >      params.pipeline_flags = 0;
> > -    params.filter_flags = VA_FILTER_SCALING_HQ;
> > +    params.filter_flags |= ctx->mode;
>
> "=" would feel safer - "|=" implies something else might have been setting it as well.
>
Will keep the old way
> >
> >      err = ff_vaapi_vpp_render_picture(avctx, &params, output_surface);
> >      if (err < 0)
> > @@ -131,9 +148,10 @@ static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
> >
> >      av_frame_free(&input_frame);
> >
> > -    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
> > +    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64"), mode: %s.\n",
> >             av_get_pix_fmt_name(output_frame->format),
> > -           output_frame->width, output_frame->height, output_frame->pts);
> > +           output_frame->width, output_frame->height, output_frame->pts,
> > +           scale_vaapi_mode_name(ctx->mode));
> >
> >      return ff_filter_frame(outlink, output_frame);
> >
> > @@ -174,6 +192,15 @@ static const AVOption scale_vaapi_options[] = {
> >        OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags = FLAGS },
> >      { "format", "Output video format (software format of hardware frames)",
> >        OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags = FLAGS },
> > +    { "mode", "Scaling mode",
> > +      OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = VA_FILTER_SCALING_HQ },
> > +      0, VA_FILTER_SCALING_NL_ANAMORPHIC, FLAGS, "mode" },
>
> NL_ANAMORPHIC mentioned in this limit but not offered as an option?
>
NL_ANAMORPHIC never be support in the driver (both i965 and iHD), and
will be obsolete from libva, so I will change this part and remove
NL_ANAMORPHIC
> > +    { "default", "Use the default (depend on the driver) scaling algorithm",
> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_DEFAULT }, 0, 0, FLAGS, "mode" },
> > +    { "fast", "Use fast scaling algorithm",
> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_FAST }, 0, 0, FLAGS, "mode" },
> > +    { "hq", "Use high quality scaling algorithm",
> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_HQ }, 0, 0, FLAGS,  "mode" },
> >      { NULL },
> >  };
> >
> >
>
> LGTM in any case.
>
> (Ack on keeping the HQ default - IIRC the reason for choosing HQ as the mode when this was written was that the default/fast mode was not faster and had much worse quality on some of the older Intel platforms (I would guess Bay Trail based on what I probably had available at the time).  Might be worth investigating further if you have such machines available to test.)
>
I don't have Bay Trail (just Skylark and Kabylake), will investigate
this issue if I found this model. Tks.
> Thanks,
>
> - Mark
Zhong Li Jan. 15, 2019, 9:57 a.m.
> -----Original Message-----

> From: ffmpeg-devel [mailto:ffmpeg-devel-bounces@ffmpeg.org] On Behalf

> Of Mark Thompson

> Sent: Monday, December 10, 2018 2:26 AM

> To: ffmpeg-devel@ffmpeg.org

> Subject: Re: [FFmpeg-devel] [PATCH V1 1/2] lavfi/vf_scale_vaapi: add scaling

> mode setting support.

> 

> On 06/12/2018 10:39, Jun Zhao wrote:

> > before this change, scale_vaapi hard coding the scaling mode, add a

> > new option "mode" to setting the scaling mode, it can be use to change

> > scaling algorithm for performance/quality trade off.

> >

> > Signed-off-by: Jun Zhao <mypopydev@gmail.com>

> > ---

> >  libavfilter/vf_scale_vaapi.c |   33

> ++++++++++++++++++++++++++++++---

> >  1 files changed, 30 insertions(+), 3 deletions(-)

> >

> > diff --git a/libavfilter/vf_scale_vaapi.c

> > b/libavfilter/vf_scale_vaapi.c index d6529d5..ad222e6 100644

> > --- a/libavfilter/vf_scale_vaapi.c

> > +++ b/libavfilter/vf_scale_vaapi.c

> > @@ -35,10 +35,26 @@ typedef struct ScaleVAAPIContext {

> >

> >      char *output_format_string;

> >

> > +    int   mode;

> > +

> >      char *w_expr;      // width expression string

> >      char *h_expr;      // height expression string

> >  } ScaleVAAPIContext;

> >

> > +static const char *scale_vaapi_mode_name(int mode) {

> > +    switch (mode) {

> > +#define D(name) case VA_FILTER_SCALING_ ## name: return #name

> > +        D(DEFAULT);

> > +        D(FAST);

> > +        D(HQ);

> > +#undef D

> > +    default:

> > +        return "Invalid";

> > +    }

> > +}

> > +

> > +

> >  static int scale_vaapi_config_output(AVFilterLink *outlink)  {

> >      AVFilterLink *inlink     = outlink->src->inputs[0];

> > @@ -70,6 +86,7 @@ static int scale_vaapi_filter_frame(AVFilterLink

> *inlink, AVFrame *input_frame)

> >      AVFilterContext *avctx   = inlink->dst;

> >      AVFilterLink *outlink    = avctx->outputs[0];

> >      VAAPIVPPContext *vpp_ctx = avctx->priv;

> > +    ScaleVAAPIContext *ctx   = avctx->priv;

> >      AVFrame *output_frame    = NULL;

> >      VASurfaceID input_surface, output_surface;

> >      VAProcPipelineParameterBuffer params; @@ -119,7 +136,7 @@

> static

> > int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)

> >      params.output_color_standard = params.surface_color_standard;

> >

> >      params.pipeline_flags = 0;

> > -    params.filter_flags = VA_FILTER_SCALING_HQ;

> > +    params.filter_flags |= ctx->mode;

> 

> "=" would feel safer - "|=" implies something else might have been setting it

> as well.

> 

> >

> >      err = ff_vaapi_vpp_render_picture(avctx, &params,

> output_surface);

> >      if (err < 0)

> > @@ -131,9 +148,10 @@ static int scale_vaapi_filter_frame(AVFilterLink

> > *inlink, AVFrame *input_frame)

> >

> >      av_frame_free(&input_frame);

> >

> > -    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u

> (%"PRId64").\n",

> > +    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u

> > + (%"PRId64"), mode: %s.\n",

> >             av_get_pix_fmt_name(output_frame->format),

> > -           output_frame->width, output_frame->height,

> output_frame->pts);

> > +           output_frame->width, output_frame->height,

> output_frame->pts,

> > +           scale_vaapi_mode_name(ctx->mode));

> >

> >      return ff_filter_frame(outlink, output_frame);

> >

> > @@ -174,6 +192,15 @@ static const AVOption scale_vaapi_options[] = {

> >        OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags =

> FLAGS },

> >      { "format", "Output video format (software format of hardware

> frames)",

> >        OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags =

> > FLAGS },

> > +    { "mode", "Scaling mode",

> > +      OFFSET(mode), AV_OPT_TYPE_INT, { .i64 =

> VA_FILTER_SCALING_HQ },

> > +      0, VA_FILTER_SCALING_NL_ANAMORPHIC, FLAGS, "mode" },

> 

> NL_ANAMORPHIC mentioned in this limit but not offered as an option?

> 

> > +    { "default", "Use the default (depend on the driver) scaling

> algorithm",

> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_DEFAULT },

> 0, 0, FLAGS, "mode" },

> > +    { "fast", "Use fast scaling algorithm",

> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_FAST }, 0, 0,

> FLAGS, "mode" },

> > +    { "hq", "Use high quality scaling algorithm",

> > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_HQ }, 0, 0,

> > + FLAGS,  "mode" },

> >      { NULL },

> >  };

> >

> >

> 

> LGTM in any case.

> 

> (Ack on keeping the HQ default - IIRC the reason for choosing HQ as the

> mode when this was written was that the default/fast mode was not faster

> and had much worse quality on some of the older Intel platforms (I would

> guess Bay Trail based on what I probably had available at the time).  Might

> be worth investigating further if you have such machines available to test.)


Current implementation is to set VA_FILTER_SCALING_HQ as default (if mode unset), but setting "mode=default" means VA_FILTER_SCALING_DEFAULT.
Thus looks like a conflict and it is confusing.

I think would better to set the default mode to be VA_FILTER_SCALING_DEFAULT, and then driver will choose an appropriate mode. 
E.g: If SVC (Enabled started from Skylake: https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-skl-vol15-sfc.pdf ) is supported by HW , SVC will be the scaling mode. 
If it is not support, AVS may be choosed.
Implementation in iHD drvier can be referred: https://github.com/intel/media-driver/blob/master/media_driver/linux/common/vp/ddi/media_libva_vp.c#L1138

IMHO It is not a good idea to force scaling with HQ mode no matter what is the implementation of driver and the status of HW.
Zhong Li Jan. 15, 2019, 9:59 a.m.
> -----Original Message-----

> From: ffmpeg-devel [mailto:ffmpeg-devel-bounces@ffmpeg.org] On Behalf

> Of Li, Zhong

> Sent: Tuesday, January 15, 2019 5:58 PM

> To: FFmpeg development discussions and patches

> <ffmpeg-devel@ffmpeg.org>

> Subject: Re: [FFmpeg-devel] [PATCH V1 1/2] lavfi/vf_scale_vaapi: add scaling

> mode setting support.

> 

> 

> 

> > -----Original Message-----

> > From: ffmpeg-devel [mailto:ffmpeg-devel-bounces@ffmpeg.org] On

> Behalf

> > Of Mark Thompson

> > Sent: Monday, December 10, 2018 2:26 AM

> > To: ffmpeg-devel@ffmpeg.org

> > Subject: Re: [FFmpeg-devel] [PATCH V1 1/2] lavfi/vf_scale_vaapi: add

> > scaling mode setting support.

> >

> > On 06/12/2018 10:39, Jun Zhao wrote:

> > > before this change, scale_vaapi hard coding the scaling mode, add a

> > > new option "mode" to setting the scaling mode, it can be use to

> > > change scaling algorithm for performance/quality trade off.

> > >

> > > Signed-off-by: Jun Zhao <mypopydev@gmail.com>

> > > ---

> > >  libavfilter/vf_scale_vaapi.c |   33

> > ++++++++++++++++++++++++++++++---

> > >  1 files changed, 30 insertions(+), 3 deletions(-)

> > >

> > > diff --git a/libavfilter/vf_scale_vaapi.c

> > > b/libavfilter/vf_scale_vaapi.c index d6529d5..ad222e6 100644

> > > --- a/libavfilter/vf_scale_vaapi.c

> > > +++ b/libavfilter/vf_scale_vaapi.c

> > > @@ -35,10 +35,26 @@ typedef struct ScaleVAAPIContext {

> > >

> > >      char *output_format_string;

> > >

> > > +    int   mode;

> > > +

> > >      char *w_expr;      // width expression string

> > >      char *h_expr;      // height expression string

> > >  } ScaleVAAPIContext;

> > >

> > > +static const char *scale_vaapi_mode_name(int mode) {

> > > +    switch (mode) {

> > > +#define D(name) case VA_FILTER_SCALING_ ## name: return #name

> > > +        D(DEFAULT);

> > > +        D(FAST);

> > > +        D(HQ);

> > > +#undef D

> > > +    default:

> > > +        return "Invalid";

> > > +    }

> > > +}

> > > +

> > > +

> > >  static int scale_vaapi_config_output(AVFilterLink *outlink)  {

> > >      AVFilterLink *inlink     = outlink->src->inputs[0];

> > > @@ -70,6 +86,7 @@ static int scale_vaapi_filter_frame(AVFilterLink

> > *inlink, AVFrame *input_frame)

> > >      AVFilterContext *avctx   = inlink->dst;

> > >      AVFilterLink *outlink    = avctx->outputs[0];

> > >      VAAPIVPPContext *vpp_ctx = avctx->priv;

> > > +    ScaleVAAPIContext *ctx   = avctx->priv;

> > >      AVFrame *output_frame    = NULL;

> > >      VASurfaceID input_surface, output_surface;

> > >      VAProcPipelineParameterBuffer params; @@ -119,7 +136,7 @@

> > static

> > > int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)

> > >      params.output_color_standard = params.surface_color_standard;

> > >

> > >      params.pipeline_flags = 0;

> > > -    params.filter_flags = VA_FILTER_SCALING_HQ;

> > > +    params.filter_flags |= ctx->mode;

> >

> > "=" would feel safer - "|=" implies something else might have been

> > setting it as well.

> >

> > >

> > >      err = ff_vaapi_vpp_render_picture(avctx, &params,

> > output_surface);

> > >      if (err < 0)

> > > @@ -131,9 +148,10 @@ static int

> > > scale_vaapi_filter_frame(AVFilterLink

> > > *inlink, AVFrame *input_frame)

> > >

> > >      av_frame_free(&input_frame);

> > >

> > > -    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u

> > (%"PRId64").\n",

> > > +    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u

> > > + (%"PRId64"), mode: %s.\n",

> > >             av_get_pix_fmt_name(output_frame->format),

> > > -           output_frame->width, output_frame->height,

> > output_frame->pts);

> > > +           output_frame->width, output_frame->height,

> > output_frame->pts,

> > > +           scale_vaapi_mode_name(ctx->mode));

> > >

> > >      return ff_filter_frame(outlink, output_frame);

> > >

> > > @@ -174,6 +192,15 @@ static const AVOption scale_vaapi_options[] = {

> > >        OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags =

> > FLAGS },

> > >      { "format", "Output video format (software format of hardware

> > frames)",

> > >        OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags =

> > > FLAGS },

> > > +    { "mode", "Scaling mode",

> > > +      OFFSET(mode), AV_OPT_TYPE_INT, { .i64 =

> > VA_FILTER_SCALING_HQ },

> > > +      0, VA_FILTER_SCALING_NL_ANAMORPHIC, FLAGS, "mode" },

> >

> > NL_ANAMORPHIC mentioned in this limit but not offered as an option?

> >

> > > +    { "default", "Use the default (depend on the driver) scaling

> > algorithm",

> > > +      0, AV_OPT_TYPE_CONST, { .i64 =

> VA_FILTER_SCALING_DEFAULT },

> > 0, 0, FLAGS, "mode" },

> > > +    { "fast", "Use fast scaling algorithm",

> > > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_FAST }, 0,

> > > + 0,

> > FLAGS, "mode" },

> > > +    { "hq", "Use high quality scaling algorithm",

> > > +      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_HQ }, 0,

> 0,

> > > + FLAGS,  "mode" },

> > >      { NULL },

> > >  };

> > >

> > >

> >

> > LGTM in any case.

> >

> > (Ack on keeping the HQ default - IIRC the reason for choosing HQ as

> > the mode when this was written was that the default/fast mode was not

> > faster and had much worse quality on some of the older Intel platforms

> > (I would guess Bay Trail based on what I probably had available at the

> > time).  Might be worth investigating further if you have such machines

> > available to test.)

> 

> Current implementation is to set VA_FILTER_SCALING_HQ as default (if

> mode unset), but setting "mode=default" means

> VA_FILTER_SCALING_DEFAULT.

> Thus looks like a conflict and it is confusing.

> 

> I think would better to set the default mode to be

> VA_FILTER_SCALING_DEFAULT, and then driver will choose an appropriate

> mode.

> E.g: If SVC (Enabled started from Skylake:

> https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-skl-vol

> 15-sfc.pdf ) is supported by HW , SVC will be the scaling mode.


Sorry for the typo, it is SFC, not SVC.

Patch hide | download patch | download mbox

diff --git a/libavfilter/vf_scale_vaapi.c b/libavfilter/vf_scale_vaapi.c
index d6529d5..ad222e6 100644
--- a/libavfilter/vf_scale_vaapi.c
+++ b/libavfilter/vf_scale_vaapi.c
@@ -35,10 +35,26 @@  typedef struct ScaleVAAPIContext {
 
     char *output_format_string;
 
+    int   mode;
+
     char *w_expr;      // width expression string
     char *h_expr;      // height expression string
 } ScaleVAAPIContext;
 
+static const char *scale_vaapi_mode_name(int mode)
+{
+    switch (mode) {
+#define D(name) case VA_FILTER_SCALING_ ## name: return #name
+        D(DEFAULT);
+        D(FAST);
+        D(HQ);
+#undef D
+    default:
+        return "Invalid";
+    }
+}
+
+
 static int scale_vaapi_config_output(AVFilterLink *outlink)
 {
     AVFilterLink *inlink     = outlink->src->inputs[0];
@@ -70,6 +86,7 @@  static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
     AVFilterContext *avctx   = inlink->dst;
     AVFilterLink *outlink    = avctx->outputs[0];
     VAAPIVPPContext *vpp_ctx = avctx->priv;
+    ScaleVAAPIContext *ctx   = avctx->priv;
     AVFrame *output_frame    = NULL;
     VASurfaceID input_surface, output_surface;
     VAProcPipelineParameterBuffer params;
@@ -119,7 +136,7 @@  static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
     params.output_color_standard = params.surface_color_standard;
 
     params.pipeline_flags = 0;
-    params.filter_flags = VA_FILTER_SCALING_HQ;
+    params.filter_flags |= ctx->mode;
 
     err = ff_vaapi_vpp_render_picture(avctx, &params, output_surface);
     if (err < 0)
@@ -131,9 +148,10 @@  static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
 
     av_frame_free(&input_frame);
 
-    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
+    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64"), mode: %s.\n",
            av_get_pix_fmt_name(output_frame->format),
-           output_frame->width, output_frame->height, output_frame->pts);
+           output_frame->width, output_frame->height, output_frame->pts,
+           scale_vaapi_mode_name(ctx->mode));
 
     return ff_filter_frame(outlink, output_frame);
 
@@ -174,6 +192,15 @@  static const AVOption scale_vaapi_options[] = {
       OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags = FLAGS },
     { "format", "Output video format (software format of hardware frames)",
       OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags = FLAGS },
+    { "mode", "Scaling mode",
+      OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = VA_FILTER_SCALING_HQ },
+      0, VA_FILTER_SCALING_NL_ANAMORPHIC, FLAGS, "mode" },
+    { "default", "Use the default (depend on the driver) scaling algorithm",
+      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_DEFAULT }, 0, 0, FLAGS, "mode" },
+    { "fast", "Use fast scaling algorithm",
+      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_FAST }, 0, 0, FLAGS, "mode" },
+    { "hq", "Use high quality scaling algorithm",
+      0, AV_OPT_TYPE_CONST, { .i64 = VA_FILTER_SCALING_HQ }, 0, 0, FLAGS,  "mode" },
     { NULL },
 };