libavfilter/vaapi_vpp.c - manifest_repos/ffmpeg - Git at Google

 /*
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include <string.h>

 #include "libavutil/avassert.h"
 #include "libavutil/pixdesc.h"
 #include "formats.h"
 #include "internal.h"
 #include "vaapi_vpp.h"

 int ff_vaapi_vpp_query_formats(AVFilterContext *avctx)
 {
     enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_VAAPI, AV_PIX_FMT_NONE,
     };
     int err;

     if ((err = ff_formats_ref(ff_make_format_list(pix_fmts),
                               &avctx->inputs[0]->outcfg.formats)) < 0)
         return err;
     if ((err = ff_formats_ref(ff_make_format_list(pix_fmts),
                               &avctx->outputs[0]->incfg.formats)) < 0)
         return err;

     return 0;
 }

 void ff_vaapi_vpp_pipeline_uninit(AVFilterContext *avctx)
 {
     VAAPIVPPContext *ctx   = avctx->priv;
     int i;
     for (i = 0; i < ctx->nb_filter_buffers; i++) {
         if (ctx->filter_buffers[i] != VA_INVALID_ID) {
             vaDestroyBuffer(ctx->hwctx->display, ctx->filter_buffers[i]);
             ctx->filter_buffers[i] = VA_INVALID_ID;
         }
     }
     ctx->nb_filter_buffers = 0;

     if (ctx->va_context != VA_INVALID_ID) {
         vaDestroyContext(ctx->hwctx->display, ctx->va_context);
         ctx->va_context = VA_INVALID_ID;
     }

     if (ctx->va_config != VA_INVALID_ID) {
         vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
         ctx->va_config = VA_INVALID_ID;
     }

     av_buffer_unref(&ctx->device_ref);
     ctx->hwctx = NULL;
 }

 int ff_vaapi_vpp_config_input(AVFilterLink *inlink)
 {
     AVFilterContext *avctx = inlink->dst;
     VAAPIVPPContext *ctx   = avctx->priv;

     if (ctx->pipeline_uninit)
         ctx->pipeline_uninit(avctx);

     if (!inlink->hw_frames_ctx) {
         av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
                "required to associate the processing device.\n");
         return AVERROR(EINVAL);
     }

     ctx->input_frames_ref = av_buffer_ref(inlink->hw_frames_ctx);
     if (!ctx->input_frames_ref) {
         av_log(avctx, AV_LOG_ERROR, "A input frames reference create "
                "failed.\n");
         return AVERROR(ENOMEM);
     }
     ctx->input_frames = (AVHWFramesContext*)ctx->input_frames_ref->data;

     return 0;
 }

 int ff_vaapi_vpp_config_output(AVFilterLink *outlink)
 {
     AVFilterContext *avctx = outlink->src;
     VAAPIVPPContext *ctx   = avctx->priv;
     AVVAAPIHWConfig *hwconfig = NULL;
     AVHWFramesConstraints *constraints = NULL;
     AVHWFramesContext *output_frames;
     AVVAAPIFramesContext *va_frames;
     VAStatus vas;
     int err, i;

     if (ctx->pipeline_uninit)
         ctx->pipeline_uninit(avctx);

     if (!ctx->output_width)
         ctx->output_width  = avctx->inputs[0]->w;
     if (!ctx->output_height)
         ctx->output_height = avctx->inputs[0]->h;

     av_assert0(ctx->input_frames);
     ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
     if (!ctx->device_ref) {
         av_log(avctx, AV_LOG_ERROR, "A device reference create "
                "failed.\n");
         return AVERROR(ENOMEM);
     }
     ctx->hwctx = ((AVHWDeviceContext*)ctx->device_ref->data)->hwctx;

     av_assert0(ctx->va_config == VA_INVALID_ID);
     vas = vaCreateConfig(ctx->hwctx->display, VAProfileNone,
                          VAEntrypointVideoProc, NULL, 0, &ctx->va_config);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create processing pipeline "
                "config: %d (%s).\n", vas, vaErrorStr(vas));
         err = AVERROR(EIO);
         goto fail;
     }

     hwconfig = av_hwdevice_hwconfig_alloc(ctx->device_ref);
     if (!hwconfig) {
         err = AVERROR(ENOMEM);
         goto fail;
     }
     hwconfig->config_id = ctx->va_config;

     constraints = av_hwdevice_get_hwframe_constraints(ctx->device_ref,
                                                       hwconfig);
     if (!constraints) {
         err = AVERROR(ENOMEM);
         goto fail;
     }

     if (ctx->output_format == AV_PIX_FMT_NONE)
         ctx->output_format = ctx->input_frames->sw_format;
     if (constraints->valid_sw_formats) {
         for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
             if (ctx->output_format == constraints->valid_sw_formats[i])
                 break;
         }
         if (constraints->valid_sw_formats[i] == AV_PIX_FMT_NONE) {
             av_log(avctx, AV_LOG_ERROR, "Hardware does not support output "
                    "format %s.\n", av_get_pix_fmt_name(ctx->output_format));
             err = AVERROR(EINVAL);
             goto fail;
         }
     }

     if (ctx->output_width  < constraints->min_width  ||
         ctx->output_height < constraints->min_height ||
         ctx->output_width  > constraints->max_width  ||
         ctx->output_height > constraints->max_height) {
         av_log(avctx, AV_LOG_ERROR, "Hardware does not support scaling to "
                "size %dx%d (constraints: width %d-%d height %d-%d).\n",
                ctx->output_width, ctx->output_height,
                constraints->min_width,  constraints->max_width,
                constraints->min_height, constraints->max_height);
         err = AVERROR(EINVAL);
         goto fail;
     }

     outlink->hw_frames_ctx = av_hwframe_ctx_alloc(ctx->device_ref);
     if (!outlink->hw_frames_ctx) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create HW frame context "
                "for output.\n");
         err = AVERROR(ENOMEM);
         goto fail;
     }

     output_frames = (AVHWFramesContext*)outlink->hw_frames_ctx->data;

     output_frames->format    = AV_PIX_FMT_VAAPI;
     output_frames->sw_format = ctx->output_format;
     output_frames->width     = ctx->output_width;
     output_frames->height    = ctx->output_height;

     output_frames->initial_pool_size = 4;

     err = ff_filter_init_hw_frames(avctx, outlink, 10);
     if (err < 0)
         goto fail;

     err = av_hwframe_ctx_init(outlink->hw_frames_ctx);
     if (err < 0) {
         av_log(avctx, AV_LOG_ERROR, "Failed to initialise VAAPI frame "
                "context for output: %d\n", err);
         goto fail;
     }

     va_frames = output_frames->hwctx;

     av_assert0(ctx->va_context == VA_INVALID_ID);
     vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
                           ctx->output_width, ctx->output_height,
                           VA_PROGRESSIVE,
                           va_frames->surface_ids, va_frames->nb_surfaces,
                           &ctx->va_context);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create processing pipeline "
                "context: %d (%s).\n", vas, vaErrorStr(vas));
         return AVERROR(EIO);
     }

     outlink->w = ctx->output_width;
     outlink->h = ctx->output_height;

     if (ctx->build_filter_params) {
         err = ctx->build_filter_params(avctx);
         if (err < 0)
             goto fail;
     }

     av_freep(&hwconfig);
     av_hwframe_constraints_free(&constraints);
     return 0;

 fail:
     av_buffer_unref(&outlink->hw_frames_ctx);
     av_freep(&hwconfig);
     av_hwframe_constraints_free(&constraints);
     return err;
 }

 typedef struct VAAPIColourProperties {
     VAProcColorStandardType va_color_standard;

     enum AVColorPrimaries color_primaries;
     enum AVColorTransferCharacteristic color_trc;
     enum AVColorSpace colorspace;

     uint8_t va_chroma_sample_location;
     uint8_t va_color_range;

     enum AVColorRange color_range;
     enum AVChromaLocation chroma_sample_location;
 } VAAPIColourProperties;

 static const VAAPIColourProperties vaapi_colour_standard_map[] = {
     { VAProcColorStandardBT601,       5,  6,  5 },
     { VAProcColorStandardBT601,       6,  6,  6 },
     { VAProcColorStandardBT709,       1,  1,  1 },
     { VAProcColorStandardBT470M,      4,  4,  4 },
     { VAProcColorStandardBT470BG,     5,  5,  5 },
     { VAProcColorStandardSMPTE170M,   6,  6,  6 },
     { VAProcColorStandardSMPTE240M,   7,  7,  7 },
     { VAProcColorStandardGenericFilm, 8,  1,  1 },
 #if VA_CHECK_VERSION(1, 1, 0)
     { VAProcColorStandardSRGB,        1, 13,  0 },
     { VAProcColorStandardXVYCC601,    1, 11,  5 },
     { VAProcColorStandardXVYCC709,    1, 11,  1 },
     { VAProcColorStandardBT2020,      9, 14,  9 },
 #endif
 };

 static void vaapi_vpp_fill_colour_standard(VAAPIColourProperties *props,
                                            VAProcColorStandardType *vacs,
                                            int nb_vacs)
 {
     const VAAPIColourProperties *t;
     int i, j, score, best_score, worst_score;
     VAProcColorStandardType best_standard;

 #if VA_CHECK_VERSION(1, 3, 0)
     // If the driver supports explicit use of the standard values then just
     // use them and avoid doing any mapping.  (The driver may not support
     // some particular code point, but it still has enough information to
     // make a better fallback choice than we do in that case.)
     for (i = 0; i < nb_vacs; i++) {
         if (vacs[i] == VAProcColorStandardExplicit) {
             props->va_color_standard = VAProcColorStandardExplicit;
             return;
         }
     }
 #endif

     // Give scores to the possible options and choose the lowest one.
     // An exact match will score zero and therefore always be chosen, as
     // will a partial match where all unmatched elements are explicitly
     // unspecified.  If no options match at all then just pass "none" to
     // the driver and let it make its own choice.
     best_standard = VAProcColorStandardNone;
     best_score = -1;
     worst_score = 4 * (props->colorspace != AVCOL_SPC_UNSPECIFIED &&
                        props->colorspace != AVCOL_SPC_RGB) +
                   2 * (props->color_trc != AVCOL_TRC_UNSPECIFIED) +
                       (props->color_primaries != AVCOL_PRI_UNSPECIFIED);

     if (worst_score == 0) {
         // No properties are specified, so we aren't going to be able to
         // make a useful choice.
         props->va_color_standard = VAProcColorStandardNone;
         return;
     }

     for (i = 0; i < nb_vacs; i++) {
         for (j = 0; j < FF_ARRAY_ELEMS(vaapi_colour_standard_map); j++) {
             t = &vaapi_colour_standard_map[j];
             if (t->va_color_standard != vacs[i])
                 continue;

             score = 0;
             if (props->colorspace != AVCOL_SPC_UNSPECIFIED &&
                 props->colorspace != AVCOL_SPC_RGB)
                 score += 4 * (props->colorspace != t->colorspace);
             if (props->color_trc != AVCOL_TRC_UNSPECIFIED)
                 score += 2 * (props->color_trc != t->color_trc);
             if (props->color_primaries != AVCOL_PRI_UNSPECIFIED)
                 score += (props->color_primaries != t->color_primaries);

             // Only include choices which matched something.
             if (score < worst_score &&
                 (best_score == -1 || score < best_score)) {
                 best_score    = score;
                 best_standard = t->va_color_standard;
             }
         }
     }
     props->va_color_standard = best_standard;
 }

 static void vaapi_vpp_fill_chroma_sample_location(VAAPIColourProperties *props)
 {
 #if VA_CHECK_VERSION(1, 1, 0)
     static const struct {
         enum AVChromaLocation av;
         uint8_t va;
     } csl_map[] = {
         { AVCHROMA_LOC_UNSPECIFIED, VA_CHROMA_SITING_UNKNOWN },
         { AVCHROMA_LOC_LEFT,        VA_CHROMA_SITING_VERTICAL_CENTER |
                                     VA_CHROMA_SITING_HORIZONTAL_LEFT },
         { AVCHROMA_LOC_CENTER,      VA_CHROMA_SITING_VERTICAL_CENTER |
                                     VA_CHROMA_SITING_HORIZONTAL_CENTER },
         { AVCHROMA_LOC_TOPLEFT,     VA_CHROMA_SITING_VERTICAL_TOP |
                                     VA_CHROMA_SITING_HORIZONTAL_LEFT },
         { AVCHROMA_LOC_TOP,         VA_CHROMA_SITING_VERTICAL_TOP |
                                     VA_CHROMA_SITING_HORIZONTAL_CENTER },
         { AVCHROMA_LOC_BOTTOMLEFT,  VA_CHROMA_SITING_VERTICAL_BOTTOM |
                                     VA_CHROMA_SITING_HORIZONTAL_LEFT },
         { AVCHROMA_LOC_BOTTOM,      VA_CHROMA_SITING_VERTICAL_BOTTOM |
                                     VA_CHROMA_SITING_HORIZONTAL_CENTER },
     };
     int i;

     for (i = 0; i < FF_ARRAY_ELEMS(csl_map); i++) {
         if (props->chroma_sample_location == csl_map[i].av) {
             props->va_chroma_sample_location = csl_map[i].va;
             return;
         }
     }
     props->va_chroma_sample_location = VA_CHROMA_SITING_UNKNOWN;
 #else
     props->va_chroma_sample_location = 0;
 #endif
 }

 static void vaapi_vpp_fill_colour_range(VAAPIColourProperties *props)
 {
 #if VA_CHECK_VERSION(1, 1, 0)
     switch (props->color_range) {
     case AVCOL_RANGE_MPEG:
         props->va_color_range = VA_SOURCE_RANGE_REDUCED;
         break;
     case AVCOL_RANGE_JPEG:
         props->va_color_range = VA_SOURCE_RANGE_FULL;
         break;
     case AVCOL_RANGE_UNSPECIFIED:
     default:
         props->va_color_range = VA_SOURCE_RANGE_UNKNOWN;
     }
 #else
     props->va_color_range = 0;
 #endif
 }

 static void vaapi_vpp_fill_colour_properties(AVFilterContext *avctx,
                                              VAAPIColourProperties *props,
                                              VAProcColorStandardType *vacs,
                                              int nb_vacs)
 {
     vaapi_vpp_fill_colour_standard(props, vacs, nb_vacs);
     vaapi_vpp_fill_chroma_sample_location(props);
     vaapi_vpp_fill_colour_range(props);

     av_log(avctx, AV_LOG_DEBUG, "Mapped colour properties %s %s/%s/%s %s "
            "to VA standard %d chroma siting %#x range %#x.\n",
            av_color_range_name(props->color_range),
            av_color_space_name(props->colorspace),
            av_color_primaries_name(props->color_primaries),
            av_color_transfer_name(props->color_trc),
            av_chroma_location_name(props->chroma_sample_location),
            props->va_color_standard,
            props->va_chroma_sample_location, props->va_color_range);
 }

 static int vaapi_vpp_frame_is_rgb(const AVFrame *frame)
 {
     const AVHWFramesContext *hwfc;
     const AVPixFmtDescriptor *desc;
     av_assert0(frame->format == AV_PIX_FMT_VAAPI &&
                frame->hw_frames_ctx);
     hwfc = (const AVHWFramesContext*)frame->hw_frames_ctx->data;
     desc = av_pix_fmt_desc_get(hwfc->sw_format);
     av_assert0(desc);
     return !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
 }

 static int vaapi_vpp_colour_properties(AVFilterContext *avctx,
                                        VAProcPipelineParameterBuffer *params,
                                        const AVFrame *input_frame,
                                        AVFrame *output_frame)
 {
     VAAPIVPPContext *ctx = avctx->priv;
     VAAPIColourProperties input_props, output_props;
     VAProcPipelineCaps caps;
     VAStatus vas;

     vas = vaQueryVideoProcPipelineCaps(ctx->hwctx->display, ctx->va_context,
                                        ctx->filter_buffers, ctx->nb_filter_buffers,
                                        &caps);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to query capabilities for "
                "colour standard support: %d (%s).\n", vas, vaErrorStr(vas));
         return AVERROR_EXTERNAL;
     }

     input_props = (VAAPIColourProperties) {
         .colorspace = vaapi_vpp_frame_is_rgb(input_frame)
                 ? AVCOL_SPC_RGB : input_frame->colorspace,
         .color_primaries        = input_frame->color_primaries,
         .color_trc              = input_frame->color_trc,
         .color_range            = input_frame->color_range,
         .chroma_sample_location = input_frame->chroma_location,
     };

     vaapi_vpp_fill_colour_properties(avctx, &input_props,
                                      caps.input_color_standards,
                                      caps.num_input_color_standards);

     output_props = (VAAPIColourProperties) {
         .colorspace = vaapi_vpp_frame_is_rgb(output_frame)
                 ? AVCOL_SPC_RGB : output_frame->colorspace,
         .color_primaries        = output_frame->color_primaries,
         .color_trc              = output_frame->color_trc,
         .color_range            = output_frame->color_range,
         .chroma_sample_location = output_frame->chroma_location,
     };
     vaapi_vpp_fill_colour_properties(avctx, &output_props,
                                      caps.output_color_standards,
                                      caps.num_output_color_standards);

     // If the properties weren't filled completely in the output frame and
     // we chose a fixed standard then fill the known values in here.
 #if VA_CHECK_VERSION(1, 3, 0)
     if (output_props.va_color_standard != VAProcColorStandardExplicit)
 #endif
     {
         const VAAPIColourProperties *output_standard = NULL;
         int i;

         for (i = 0; i < FF_ARRAY_ELEMS(vaapi_colour_standard_map); i++) {
             if (output_props.va_color_standard ==
                 vaapi_colour_standard_map[i].va_color_standard) {
                 output_standard = &vaapi_colour_standard_map[i];
                 break;
             }
         }
         if (output_standard) {
             output_frame->colorspace = vaapi_vpp_frame_is_rgb(output_frame)
                           ? AVCOL_SPC_RGB : output_standard->colorspace;
             output_frame->color_primaries = output_standard->color_primaries;
             output_frame->color_trc       = output_standard->color_trc;
         }
     }

     params->surface_color_standard = input_props.va_color_standard;
     params->output_color_standard = output_props.va_color_standard;

 #if VA_CHECK_VERSION(1, 1, 0)
     params->input_color_properties = (VAProcColorProperties) {
         .chroma_sample_location   = input_props.va_chroma_sample_location,
         .color_range              = input_props.va_color_range,
 #if VA_CHECK_VERSION(1, 3, 0)
         .colour_primaries         = input_props.color_primaries,
         .transfer_characteristics = input_props.color_trc,
         .matrix_coefficients      = input_props.colorspace,
 #endif
     };
     params->output_color_properties = (VAProcColorProperties) {
         .chroma_sample_location   = output_props.va_chroma_sample_location,
         .color_range              = output_props.va_color_range,
 #if VA_CHECK_VERSION(1, 3, 0)
         .colour_primaries         = output_props.color_primaries,
         .transfer_characteristics = output_props.color_trc,
         .matrix_coefficients      = output_props.colorspace,
 #endif
     };
 #endif

     return 0;
 }

 int ff_vaapi_vpp_init_params(AVFilterContext *avctx,
                              VAProcPipelineParameterBuffer *params,
                              const AVFrame *input_frame,
                              AVFrame *output_frame)
 {
     VAAPIVPPContext *ctx = avctx->priv;
     VASurfaceID input_surface;
     int err;

     ctx->input_region = (VARectangle) {
         .x      = input_frame->crop_left,
         .y      = input_frame->crop_top,
         .width  = input_frame->width -
                  (input_frame->crop_left + input_frame->crop_right),
         .height = input_frame->height -
                  (input_frame->crop_top + input_frame->crop_bottom),
     };
     output_frame->crop_top    = 0;
     output_frame->crop_bottom = 0;
     output_frame->crop_left   = 0;
     output_frame->crop_right  = 0;

     input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3],

     *params = (VAProcPipelineParameterBuffer) {
         .surface                 = input_surface,
         .surface_region          = &ctx->input_region,
         .output_region           = NULL,
         .output_background_color = VAAPI_VPP_BACKGROUND_BLACK,
         .pipeline_flags          = 0,
         .filter_flags            = VA_FRAME_PICTURE,

         // Filter and reference data filled by the filter itself.

 #if VA_CHECK_VERSION(1, 1, 0)
         .rotation_state = VA_ROTATION_NONE,
         .mirror_state   = VA_MIRROR_NONE,
 #endif
     };

     err = vaapi_vpp_colour_properties(avctx, params,
                                       input_frame, output_frame);
     if (err < 0)
         return err;

     return 0;
 }

 int ff_vaapi_vpp_make_param_buffers(AVFilterContext *avctx,
                                     int type,
                                     const void *data,
                                     size_t size,
                                     int count)
 {
     VAStatus vas;
     VABufferID buffer;
     VAAPIVPPContext *ctx   = avctx->priv;

     av_assert0(ctx->nb_filter_buffers + 1 <= VAProcFilterCount);

     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
                          type, size, count, (void*)data, &buffer);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter "
                "buffer (type %d): %d (%s).\n",
                type, vas, vaErrorStr(vas));
         return AVERROR(EIO);
     }

     ctx->filter_buffers[ctx->nb_filter_buffers++] = buffer;

     av_log(avctx, AV_LOG_DEBUG, "Param buffer (type %d, %zu bytes, count %d) "
            "is %#x.\n", type, size, count, buffer);
     return 0;
 }


 int ff_vaapi_vpp_render_picture(AVFilterContext *avctx,
                                 VAProcPipelineParameterBuffer *params,
                                 AVFrame *output_frame)
 {
     VAAPIVPPContext *ctx = avctx->priv;
     VASurfaceID output_surface;
     VABufferID params_id;
     VAStatus vas;
     int err;

     output_surface = (VASurfaceID)(uintptr_t)output_frame->data[3];

     vas = vaBeginPicture(ctx->hwctx->display,
                          ctx->va_context, output_surface);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to attach new picture: "
                "%d (%s).\n", vas, vaErrorStr(vas));
         err = AVERROR(EIO);
         goto fail;
     }

     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
                          VAProcPipelineParameterBufferType,
                          sizeof(*params), 1, params, &params_id);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter buffer: "
                "%d (%s).\n", vas, vaErrorStr(vas));
         err = AVERROR(EIO);
         goto fail_after_begin;
     }
     av_log(avctx, AV_LOG_DEBUG, "Pipeline parameter buffer is %#x.\n",
            params_id);

     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
                           &params_id, 1);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to render parameter buffer: "
                "%d (%s).\n", vas, vaErrorStr(vas));
         err = AVERROR(EIO);
         goto fail_after_begin;
     }

     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to start picture processing: "
                "%d (%s).\n", vas, vaErrorStr(vas));
         err = AVERROR(EIO);
         goto fail_after_render;
     }

     if (CONFIG_VAAPI_1 || ctx->hwctx->driver_quirks &
         AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS) {
         vas = vaDestroyBuffer(ctx->hwctx->display, params_id);
         if (vas != VA_STATUS_SUCCESS) {
             av_log(avctx, AV_LOG_ERROR, "Failed to free parameter buffer: "
                    "%d (%s).\n", vas, vaErrorStr(vas));
             // And ignore.
         }
     }

     return 0;

     // We want to make sure that if vaBeginPicture has been called, we also
     // call vaRenderPicture and vaEndPicture.  These calls may well fail or
     // do something else nasty, but once we're in this failure case there
     // isn't much else we can do.
 fail_after_begin:
     vaRenderPicture(ctx->hwctx->display, ctx->va_context, &params_id, 1);
 fail_after_render:
     vaEndPicture(ctx->hwctx->display, ctx->va_context);
 fail:
     return err;
 }

 void ff_vaapi_vpp_ctx_init(AVFilterContext *avctx)
 {
     int i;
     VAAPIVPPContext *ctx   = avctx->priv;

     ctx->va_config  = VA_INVALID_ID;
     ctx->va_context = VA_INVALID_ID;
     ctx->valid_ids  = 1;

     for (i = 0; i < VAProcFilterCount; i++)
         ctx->filter_buffers[i] = VA_INVALID_ID;
     ctx->nb_filter_buffers = 0;
 }

 void ff_vaapi_vpp_ctx_uninit(AVFilterContext *avctx)
 {
     VAAPIVPPContext *ctx   = avctx->priv;
     if (ctx->valid_ids && ctx->pipeline_uninit)
         ctx->pipeline_uninit(avctx);

     av_buffer_unref(&ctx->input_frames_ref);
     av_buffer_unref(&ctx->device_ref);
 }
	/*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include <string.h>

	#include "libavutil/avassert.h"
	#include "libavutil/pixdesc.h"
	#include "formats.h"
	#include "internal.h"
	#include "vaapi_vpp.h"

	int ff_vaapi_vpp_query_formats(AVFilterContext *avctx)
	{
	enum AVPixelFormat pix_fmts[] = {
	AV_PIX_FMT_VAAPI, AV_PIX_FMT_NONE,
	};
	int err;

	if ((err = ff_formats_ref(ff_make_format_list(pix_fmts),
	&avctx->inputs[0]->outcfg.formats)) < 0)
	return err;
	if ((err = ff_formats_ref(ff_make_format_list(pix_fmts),
	&avctx->outputs[0]->incfg.formats)) < 0)
	return err;

	return 0;
	}

	void ff_vaapi_vpp_pipeline_uninit(AVFilterContext *avctx)
	{
	VAAPIVPPContext *ctx = avctx->priv;
	int i;
	for (i = 0; i < ctx->nb_filter_buffers; i++) {
	if (ctx->filter_buffers[i] != VA_INVALID_ID) {
	vaDestroyBuffer(ctx->hwctx->display, ctx->filter_buffers[i]);
	ctx->filter_buffers[i] = VA_INVALID_ID;
	}
	}
	ctx->nb_filter_buffers = 0;

	if (ctx->va_context != VA_INVALID_ID) {
	vaDestroyContext(ctx->hwctx->display, ctx->va_context);
	ctx->va_context = VA_INVALID_ID;
	}

	if (ctx->va_config != VA_INVALID_ID) {
	vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
	ctx->va_config = VA_INVALID_ID;
	}

	av_buffer_unref(&ctx->device_ref);
	ctx->hwctx = NULL;
	}

	int ff_vaapi_vpp_config_input(AVFilterLink *inlink)
	{
	AVFilterContext *avctx = inlink->dst;
	VAAPIVPPContext *ctx = avctx->priv;

	if (ctx->pipeline_uninit)
	ctx->pipeline_uninit(avctx);

	if (!inlink->hw_frames_ctx) {
	av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
	"required to associate the processing device.\n");
	return AVERROR(EINVAL);
	}

	ctx->input_frames_ref = av_buffer_ref(inlink->hw_frames_ctx);
	if (!ctx->input_frames_ref) {
	av_log(avctx, AV_LOG_ERROR, "A input frames reference create "
	"failed.\n");
	return AVERROR(ENOMEM);
	}
	ctx->input_frames = (AVHWFramesContext*)ctx->input_frames_ref->data;

	return 0;
	}

	int ff_vaapi_vpp_config_output(AVFilterLink *outlink)
	{
	AVFilterContext *avctx = outlink->src;
	VAAPIVPPContext *ctx = avctx->priv;
	AVVAAPIHWConfig *hwconfig = NULL;
	AVHWFramesConstraints *constraints = NULL;
	AVHWFramesContext *output_frames;
	AVVAAPIFramesContext *va_frames;
	VAStatus vas;
	int err, i;

	if (ctx->pipeline_uninit)
	ctx->pipeline_uninit(avctx);

	if (!ctx->output_width)
	ctx->output_width = avctx->inputs[0]->w;
	if (!ctx->output_height)
	ctx->output_height = avctx->inputs[0]->h;

	av_assert0(ctx->input_frames);
	ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
	if (!ctx->device_ref) {
	av_log(avctx, AV_LOG_ERROR, "A device reference create "
	"failed.\n");
	return AVERROR(ENOMEM);
	}
	ctx->hwctx = ((AVHWDeviceContext*)ctx->device_ref->data)->hwctx;

	av_assert0(ctx->va_config == VA_INVALID_ID);
	vas = vaCreateConfig(ctx->hwctx->display, VAProfileNone,
	VAEntrypointVideoProc, NULL, 0, &ctx->va_config);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create processing pipeline "
	"config: %d (%s).\n", vas, vaErrorStr(vas));
	err = AVERROR(EIO);
	goto fail;
	}

	hwconfig = av_hwdevice_hwconfig_alloc(ctx->device_ref);
	if (!hwconfig) {
	err = AVERROR(ENOMEM);
	goto fail;
	}
	hwconfig->config_id = ctx->va_config;

	constraints = av_hwdevice_get_hwframe_constraints(ctx->device_ref,
	hwconfig);
	if (!constraints) {
	err = AVERROR(ENOMEM);
	goto fail;
	}

	if (ctx->output_format == AV_PIX_FMT_NONE)
	ctx->output_format = ctx->input_frames->sw_format;
	if (constraints->valid_sw_formats) {
	for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
	if (ctx->output_format == constraints->valid_sw_formats[i])
	break;
	}
	if (constraints->valid_sw_formats[i] == AV_PIX_FMT_NONE) {
	av_log(avctx, AV_LOG_ERROR, "Hardware does not support output "
	"format %s.\n", av_get_pix_fmt_name(ctx->output_format));
	err = AVERROR(EINVAL);
	goto fail;
	}
	}

	if (ctx->output_width < constraints->min_width \|\|
	ctx->output_height < constraints->min_height \|\|
	ctx->output_width > constraints->max_width \|\|
	ctx->output_height > constraints->max_height) {
	av_log(avctx, AV_LOG_ERROR, "Hardware does not support scaling to "
	"size %dx%d (constraints: width %d-%d height %d-%d).\n",
	ctx->output_width, ctx->output_height,
	constraints->min_width, constraints->max_width,
	constraints->min_height, constraints->max_height);
	err = AVERROR(EINVAL);
	goto fail;
	}

	outlink->hw_frames_ctx = av_hwframe_ctx_alloc(ctx->device_ref);
	if (!outlink->hw_frames_ctx) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create HW frame context "
	"for output.\n");
	err = AVERROR(ENOMEM);
	goto fail;
	}

	output_frames = (AVHWFramesContext*)outlink->hw_frames_ctx->data;

	output_frames->format = AV_PIX_FMT_VAAPI;
	output_frames->sw_format = ctx->output_format;
	output_frames->width = ctx->output_width;
	output_frames->height = ctx->output_height;

	output_frames->initial_pool_size = 4;

	err = ff_filter_init_hw_frames(avctx, outlink, 10);
	if (err < 0)
	goto fail;

	err = av_hwframe_ctx_init(outlink->hw_frames_ctx);
	if (err < 0) {
	av_log(avctx, AV_LOG_ERROR, "Failed to initialise VAAPI frame "
	"context for output: %d\n", err);
	goto fail;
	}

	va_frames = output_frames->hwctx;

	av_assert0(ctx->va_context == VA_INVALID_ID);
	vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
	ctx->output_width, ctx->output_height,
	VA_PROGRESSIVE,
	va_frames->surface_ids, va_frames->nb_surfaces,
	&ctx->va_context);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create processing pipeline "
	"context: %d (%s).\n", vas, vaErrorStr(vas));
	return AVERROR(EIO);
	}

	outlink->w = ctx->output_width;
	outlink->h = ctx->output_height;

	if (ctx->build_filter_params) {
	err = ctx->build_filter_params(avctx);
	if (err < 0)
	goto fail;
	}

	av_freep(&hwconfig);
	av_hwframe_constraints_free(&constraints);
	return 0;

	fail:
	av_buffer_unref(&outlink->hw_frames_ctx);
	av_freep(&hwconfig);
	av_hwframe_constraints_free(&constraints);
	return err;
	}

	typedef struct VAAPIColourProperties {
	VAProcColorStandardType va_color_standard;

	enum AVColorPrimaries color_primaries;
	enum AVColorTransferCharacteristic color_trc;
	enum AVColorSpace colorspace;

	uint8_t va_chroma_sample_location;
	uint8_t va_color_range;

	enum AVColorRange color_range;
	enum AVChromaLocation chroma_sample_location;
	} VAAPIColourProperties;

	static const VAAPIColourProperties vaapi_colour_standard_map[] = {
	{ VAProcColorStandardBT601, 5, 6, 5 },
	{ VAProcColorStandardBT601, 6, 6, 6 },
	{ VAProcColorStandardBT709, 1, 1, 1 },
	{ VAProcColorStandardBT470M, 4, 4, 4 },
	{ VAProcColorStandardBT470BG, 5, 5, 5 },
	{ VAProcColorStandardSMPTE170M, 6, 6, 6 },
	{ VAProcColorStandardSMPTE240M, 7, 7, 7 },
	{ VAProcColorStandardGenericFilm, 8, 1, 1 },
	#if VA_CHECK_VERSION(1, 1, 0)
	{ VAProcColorStandardSRGB, 1, 13, 0 },
	{ VAProcColorStandardXVYCC601, 1, 11, 5 },
	{ VAProcColorStandardXVYCC709, 1, 11, 1 },
	{ VAProcColorStandardBT2020, 9, 14, 9 },
	#endif
	};

	static void vaapi_vpp_fill_colour_standard(VAAPIColourProperties *props,
	VAProcColorStandardType *vacs,
	int nb_vacs)
	{
	const VAAPIColourProperties *t;
	int i, j, score, best_score, worst_score;
	VAProcColorStandardType best_standard;

	#if VA_CHECK_VERSION(1, 3, 0)
	// If the driver supports explicit use of the standard values then just
	// use them and avoid doing any mapping. (The driver may not support
	// some particular code point, but it still has enough information to
	// make a better fallback choice than we do in that case.)
	for (i = 0; i < nb_vacs; i++) {
	if (vacs[i] == VAProcColorStandardExplicit) {
	props->va_color_standard = VAProcColorStandardExplicit;
	return;
	}
	}
	#endif

	// Give scores to the possible options and choose the lowest one.
	// An exact match will score zero and therefore always be chosen, as
	// will a partial match where all unmatched elements are explicitly
	// unspecified. If no options match at all then just pass "none" to
	// the driver and let it make its own choice.
	best_standard = VAProcColorStandardNone;
	best_score = -1;
	worst_score = 4 * (props->colorspace != AVCOL_SPC_UNSPECIFIED &&
	props->colorspace != AVCOL_SPC_RGB) +
	2 * (props->color_trc != AVCOL_TRC_UNSPECIFIED) +
	(props->color_primaries != AVCOL_PRI_UNSPECIFIED);

	if (worst_score == 0) {
	// No properties are specified, so we aren't going to be able to
	// make a useful choice.
	props->va_color_standard = VAProcColorStandardNone;
	return;
	}

	for (i = 0; i < nb_vacs; i++) {
	for (j = 0; j < FF_ARRAY_ELEMS(vaapi_colour_standard_map); j++) {
	t = &vaapi_colour_standard_map[j];
	if (t->va_color_standard != vacs[i])
	continue;

	score = 0;
	if (props->colorspace != AVCOL_SPC_UNSPECIFIED &&
	props->colorspace != AVCOL_SPC_RGB)
	score += 4 * (props->colorspace != t->colorspace);
	if (props->color_trc != AVCOL_TRC_UNSPECIFIED)
	score += 2 * (props->color_trc != t->color_trc);
	if (props->color_primaries != AVCOL_PRI_UNSPECIFIED)
	score += (props->color_primaries != t->color_primaries);

	// Only include choices which matched something.
	if (score < worst_score &&
	(best_score == -1 \|\| score < best_score)) {
	best_score = score;
	best_standard = t->va_color_standard;
	}
	}
	}
	props->va_color_standard = best_standard;
	}

	static void vaapi_vpp_fill_chroma_sample_location(VAAPIColourProperties *props)
	{
	#if VA_CHECK_VERSION(1, 1, 0)
	static const struct {
	enum AVChromaLocation av;
	uint8_t va;
	} csl_map[] = {
	{ AVCHROMA_LOC_UNSPECIFIED, VA_CHROMA_SITING_UNKNOWN },
	{ AVCHROMA_LOC_LEFT, VA_CHROMA_SITING_VERTICAL_CENTER \|
	VA_CHROMA_SITING_HORIZONTAL_LEFT },
	{ AVCHROMA_LOC_CENTER, VA_CHROMA_SITING_VERTICAL_CENTER \|
	VA_CHROMA_SITING_HORIZONTAL_CENTER },
	{ AVCHROMA_LOC_TOPLEFT, VA_CHROMA_SITING_VERTICAL_TOP \|
	VA_CHROMA_SITING_HORIZONTAL_LEFT },
	{ AVCHROMA_LOC_TOP, VA_CHROMA_SITING_VERTICAL_TOP \|
	VA_CHROMA_SITING_HORIZONTAL_CENTER },
	{ AVCHROMA_LOC_BOTTOMLEFT, VA_CHROMA_SITING_VERTICAL_BOTTOM \|
	VA_CHROMA_SITING_HORIZONTAL_LEFT },
	{ AVCHROMA_LOC_BOTTOM, VA_CHROMA_SITING_VERTICAL_BOTTOM \|
	VA_CHROMA_SITING_HORIZONTAL_CENTER },
	};
	int i;

	for (i = 0; i < FF_ARRAY_ELEMS(csl_map); i++) {
	if (props->chroma_sample_location == csl_map[i].av) {
	props->va_chroma_sample_location = csl_map[i].va;
	return;
	}
	}
	props->va_chroma_sample_location = VA_CHROMA_SITING_UNKNOWN;
	#else
	props->va_chroma_sample_location = 0;
	#endif
	}

	static void vaapi_vpp_fill_colour_range(VAAPIColourProperties *props)
	{
	#if VA_CHECK_VERSION(1, 1, 0)
	switch (props->color_range) {
	case AVCOL_RANGE_MPEG:
	props->va_color_range = VA_SOURCE_RANGE_REDUCED;
	break;
	case AVCOL_RANGE_JPEG:
	props->va_color_range = VA_SOURCE_RANGE_FULL;
	break;
	case AVCOL_RANGE_UNSPECIFIED:
	default:
	props->va_color_range = VA_SOURCE_RANGE_UNKNOWN;
	}
	#else
	props->va_color_range = 0;
	#endif
	}

	static void vaapi_vpp_fill_colour_properties(AVFilterContext *avctx,
	VAAPIColourProperties *props,
	VAProcColorStandardType *vacs,
	int nb_vacs)
	{
	vaapi_vpp_fill_colour_standard(props, vacs, nb_vacs);
	vaapi_vpp_fill_chroma_sample_location(props);
	vaapi_vpp_fill_colour_range(props);

	av_log(avctx, AV_LOG_DEBUG, "Mapped colour properties %s %s/%s/%s %s "
	"to VA standard %d chroma siting %#x range %#x.\n",
	av_color_range_name(props->color_range),
	av_color_space_name(props->colorspace),
	av_color_primaries_name(props->color_primaries),
	av_color_transfer_name(props->color_trc),
	av_chroma_location_name(props->chroma_sample_location),
	props->va_color_standard,
	props->va_chroma_sample_location, props->va_color_range);
	}

	static int vaapi_vpp_frame_is_rgb(const AVFrame *frame)
	{
	const AVHWFramesContext *hwfc;
	const AVPixFmtDescriptor *desc;
	av_assert0(frame->format == AV_PIX_FMT_VAAPI &&
	frame->hw_frames_ctx);
	hwfc = (const AVHWFramesContext*)frame->hw_frames_ctx->data;
	desc = av_pix_fmt_desc_get(hwfc->sw_format);
	av_assert0(desc);
	return !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
	}

	static int vaapi_vpp_colour_properties(AVFilterContext *avctx,
	VAProcPipelineParameterBuffer *params,
	const AVFrame *input_frame,
	AVFrame *output_frame)
	{
	VAAPIVPPContext *ctx = avctx->priv;
	VAAPIColourProperties input_props, output_props;
	VAProcPipelineCaps caps;
	VAStatus vas;

	vas = vaQueryVideoProcPipelineCaps(ctx->hwctx->display, ctx->va_context,
	ctx->filter_buffers, ctx->nb_filter_buffers,
	&caps);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to query capabilities for "
	"colour standard support: %d (%s).\n", vas, vaErrorStr(vas));
	return AVERROR_EXTERNAL;
	}

	input_props = (VAAPIColourProperties) {
	.colorspace = vaapi_vpp_frame_is_rgb(input_frame)
	? AVCOL_SPC_RGB : input_frame->colorspace,
	.color_primaries = input_frame->color_primaries,
	.color_trc = input_frame->color_trc,
	.color_range = input_frame->color_range,
	.chroma_sample_location = input_frame->chroma_location,
	};

	vaapi_vpp_fill_colour_properties(avctx, &input_props,
	caps.input_color_standards,
	caps.num_input_color_standards);

	output_props = (VAAPIColourProperties) {
	.colorspace = vaapi_vpp_frame_is_rgb(output_frame)
	? AVCOL_SPC_RGB : output_frame->colorspace,
	.color_primaries = output_frame->color_primaries,
	.color_trc = output_frame->color_trc,
	.color_range = output_frame->color_range,
	.chroma_sample_location = output_frame->chroma_location,
	};
	vaapi_vpp_fill_colour_properties(avctx, &output_props,
	caps.output_color_standards,
	caps.num_output_color_standards);

	// If the properties weren't filled completely in the output frame and
	// we chose a fixed standard then fill the known values in here.
	#if VA_CHECK_VERSION(1, 3, 0)
	if (output_props.va_color_standard != VAProcColorStandardExplicit)
	#endif
	{
	const VAAPIColourProperties *output_standard = NULL;
	int i;

	for (i = 0; i < FF_ARRAY_ELEMS(vaapi_colour_standard_map); i++) {
	if (output_props.va_color_standard ==
	vaapi_colour_standard_map[i].va_color_standard) {
	output_standard = &vaapi_colour_standard_map[i];
	break;
	}
	}
	if (output_standard) {
	output_frame->colorspace = vaapi_vpp_frame_is_rgb(output_frame)
	? AVCOL_SPC_RGB : output_standard->colorspace;
	output_frame->color_primaries = output_standard->color_primaries;
	output_frame->color_trc = output_standard->color_trc;
	}
	}

	params->surface_color_standard = input_props.va_color_standard;
	params->output_color_standard = output_props.va_color_standard;

	#if VA_CHECK_VERSION(1, 1, 0)
	params->input_color_properties = (VAProcColorProperties) {
	.chroma_sample_location = input_props.va_chroma_sample_location,
	.color_range = input_props.va_color_range,
	#if VA_CHECK_VERSION(1, 3, 0)
	.colour_primaries = input_props.color_primaries,
	.transfer_characteristics = input_props.color_trc,
	.matrix_coefficients = input_props.colorspace,
	#endif
	};
	params->output_color_properties = (VAProcColorProperties) {
	.chroma_sample_location = output_props.va_chroma_sample_location,
	.color_range = output_props.va_color_range,
	#if VA_CHECK_VERSION(1, 3, 0)
	.colour_primaries = output_props.color_primaries,
	.transfer_characteristics = output_props.color_trc,
	.matrix_coefficients = output_props.colorspace,
	#endif
	};
	#endif

	return 0;
	}

	int ff_vaapi_vpp_init_params(AVFilterContext *avctx,
	VAProcPipelineParameterBuffer *params,
	const AVFrame *input_frame,
	AVFrame *output_frame)
	{
	VAAPIVPPContext *ctx = avctx->priv;
	VASurfaceID input_surface;
	int err;

	ctx->input_region = (VARectangle) {
	.x = input_frame->crop_left,
	.y = input_frame->crop_top,
	.width = input_frame->width -
	(input_frame->crop_left + input_frame->crop_right),
	.height = input_frame->height -
	(input_frame->crop_top + input_frame->crop_bottom),
	};
	output_frame->crop_top = 0;
	output_frame->crop_bottom = 0;
	output_frame->crop_left = 0;
	output_frame->crop_right = 0;

	input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3],

	*params = (VAProcPipelineParameterBuffer) {
	.surface = input_surface,
	.surface_region = &ctx->input_region,
	.output_region = NULL,
	.output_background_color = VAAPI_VPP_BACKGROUND_BLACK,
	.pipeline_flags = 0,
	.filter_flags = VA_FRAME_PICTURE,

	// Filter and reference data filled by the filter itself.

	#if VA_CHECK_VERSION(1, 1, 0)
	.rotation_state = VA_ROTATION_NONE,
	.mirror_state = VA_MIRROR_NONE,
	#endif
	};

	err = vaapi_vpp_colour_properties(avctx, params,
	input_frame, output_frame);
	if (err < 0)
	return err;

	return 0;
	}

	int ff_vaapi_vpp_make_param_buffers(AVFilterContext *avctx,
	int type,
	const void *data,
	size_t size,
	int count)
	{
	VAStatus vas;
	VABufferID buffer;
	VAAPIVPPContext *ctx = avctx->priv;

	av_assert0(ctx->nb_filter_buffers + 1 <= VAProcFilterCount);

	vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
	type, size, count, (void*)data, &buffer);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create parameter "
	"buffer (type %d): %d (%s).\n",
	type, vas, vaErrorStr(vas));
	return AVERROR(EIO);
	}

	ctx->filter_buffers[ctx->nb_filter_buffers++] = buffer;

	av_log(avctx, AV_LOG_DEBUG, "Param buffer (type %d, %zu bytes, count %d) "
	"is %#x.\n", type, size, count, buffer);
	return 0;
	}


	int ff_vaapi_vpp_render_picture(AVFilterContext *avctx,
	VAProcPipelineParameterBuffer *params,
	AVFrame *output_frame)
	{
	VAAPIVPPContext *ctx = avctx->priv;
	VASurfaceID output_surface;
	VABufferID params_id;
	VAStatus vas;
	int err;

	output_surface = (VASurfaceID)(uintptr_t)output_frame->data[3];

	vas = vaBeginPicture(ctx->hwctx->display,
	ctx->va_context, output_surface);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to attach new picture: "
	"%d (%s).\n", vas, vaErrorStr(vas));
	err = AVERROR(EIO);
	goto fail;
	}

	vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
	VAProcPipelineParameterBufferType,
	sizeof(*params), 1, params, &params_id);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create parameter buffer: "
	"%d (%s).\n", vas, vaErrorStr(vas));
	err = AVERROR(EIO);
	goto fail_after_begin;
	}
	av_log(avctx, AV_LOG_DEBUG, "Pipeline parameter buffer is %#x.\n",
	params_id);

	vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
	&params_id, 1);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to render parameter buffer: "
	"%d (%s).\n", vas, vaErrorStr(vas));
	err = AVERROR(EIO);
	goto fail_after_begin;
	}

	vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to start picture processing: "
	"%d (%s).\n", vas, vaErrorStr(vas));
	err = AVERROR(EIO);
	goto fail_after_render;
	}

	if (CONFIG_VAAPI_1 \|\| ctx->hwctx->driver_quirks &
	AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS) {
	vas = vaDestroyBuffer(ctx->hwctx->display, params_id);
	if (vas != VA_STATUS_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to free parameter buffer: "
	"%d (%s).\n", vas, vaErrorStr(vas));
	// And ignore.
	}
	}

	return 0;

	// We want to make sure that if vaBeginPicture has been called, we also
	// call vaRenderPicture and vaEndPicture. These calls may well fail or
	// do something else nasty, but once we're in this failure case there
	// isn't much else we can do.
	fail_after_begin:
	vaRenderPicture(ctx->hwctx->display, ctx->va_context, &params_id, 1);
	fail_after_render:
	vaEndPicture(ctx->hwctx->display, ctx->va_context);
	fail:
	return err;
	}

	void ff_vaapi_vpp_ctx_init(AVFilterContext *avctx)
	{
	int i;
	VAAPIVPPContext *ctx = avctx->priv;

	ctx->va_config = VA_INVALID_ID;
	ctx->va_context = VA_INVALID_ID;
	ctx->valid_ids = 1;

	for (i = 0; i < VAProcFilterCount; i++)
	ctx->filter_buffers[i] = VA_INVALID_ID;
	ctx->nb_filter_buffers = 0;
	}

	void ff_vaapi_vpp_ctx_uninit(AVFilterContext *avctx)
	{
	VAAPIVPPContext *ctx = avctx->priv;
	if (ctx->valid_ids && ctx->pipeline_uninit)
	ctx->pipeline_uninit(avctx);

	av_buffer_unref(&ctx->input_frames_ref);
	av_buffer_unref(&ctx->device_ref);
	}