text: /*
   * 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 <va/va.h>
  #include <va/va_vpp.h>
  
  #include "libavutil/avassert.h"
  #include "libavutil/common.h"
  #include "libavutil/hwcontext.h"
  #include "libavutil/hwcontext_vaapi.h"
  #include "libavutil/mem.h"
  #include "libavutil/opt.h"
  #include "libavutil/pixdesc.h"
  
  #include "avfilter.h"
  #include "formats.h"
  #include "internal.h"
  #include "video.h"
  
  #define MAX_REFERENCES 8
  
  typedef struct DeintVAAPIContext {
      const AVClass     *class;
  
      AVVAAPIDeviceContext *hwctx;
      AVBufferRef       *device_ref;
  
      int                mode;
      int                field_rate;
      int                auto_enable;
  
      int                valid_ids;
      VAConfigID         va_config;
      VAContextID        va_context;
  
      AVBufferRef       *input_frames_ref;
      AVHWFramesContext *input_frames;
  
      AVBufferRef       *output_frames_ref;
      AVHWFramesContext *output_frames;
      int                output_height;
      int                output_width;
  
      VAProcFilterCapDeinterlacing
                         deint_caps[VAProcDeinterlacingCount];
      int             nb_deint_caps;
      VAProcPipelineCaps pipeline_caps;
  
      int                queue_depth;
      int                queue_count;
      AVFrame           *frame_queue[MAX_REFERENCES];
      int                extra_delay_for_timestamps;
  
      VABufferID         filter_buffer;
  } DeintVAAPIContext;
  
  static const char *deint_vaapi_mode_name(int mode)
  {
      switch (mode) {
  #define D(name) case VAProcDeinterlacing ## name: return #name
          D(Bob);
          D(Weave);
          D(MotionAdaptive);
          D(MotionCompensated);
  #undef D
      default:
          return "Invalid";
      }
  }
  
  static int deint_vaapi_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]->out_formats)) < 0)
          return err;
      if ((err = ff_formats_ref(ff_make_format_list(pix_fmts),
                                &avctx->outputs[0]->in_formats)) < 0)
          return err;
  
      return 0;
  }
  
  static int deint_vaapi_pipeline_uninit(AVFilterContext *avctx)
  {
      DeintVAAPIContext *ctx = avctx->priv;
      int i;
  
      for (i = 0; i < ctx->queue_count; i++)
          av_frame_free(&ctx->frame_queue[i]);
      ctx->queue_count = 0;
  
      if (ctx->filter_buffer != VA_INVALID_ID) {
          vaDestroyBuffer(ctx->hwctx->display, ctx->filter_buffer);
          ctx->filter_buffer = VA_INVALID_ID;
      }
  
      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;
  
      return 0;
  }
  
  static int deint_vaapi_config_input(AVFilterLink *inlink)
  {
      AVFilterContext   *avctx = inlink->dst;
      DeintVAAPIContext *ctx = avctx->priv;
  
      deint_vaapi_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);
      ctx->input_frames = (AVHWFramesContext*)ctx->input_frames_ref->data;
  
      return 0;
  }
  
  static int deint_vaapi_build_filter_params(AVFilterContext *avctx)
  {
      DeintVAAPIContext *ctx = avctx->priv;
      VAStatus vas;
      VAProcFilterParameterBufferDeinterlacing params;
      int i;
  
      ctx->nb_deint_caps = VAProcDeinterlacingCount;
      vas = vaQueryVideoProcFilterCaps(ctx->hwctx->display,
                                       ctx->va_context,
                                       VAProcFilterDeinterlacing,
                                       &ctx->deint_caps,
                                       &ctx->nb_deint_caps);
      if (vas != VA_STATUS_SUCCESS) {
          av_log(avctx, AV_LOG_ERROR, "Failed to query deinterlacing "
                 "caps: %d (%s).\n", vas, vaErrorStr(vas));
          return AVERROR(EIO);
      }
  
      if (ctx->mode == VAProcDeinterlacingNone) {
          for (i = 0; i < ctx->nb_deint_caps; i++) {
              if (ctx->deint_caps[i].type > ctx->mode)
                  ctx->mode = ctx->deint_caps[i].type;
          }
          av_log(avctx, AV_LOG_VERBOSE, "Picking %d (%s) as default "
                 "deinterlacing mode.\n", ctx->mode,
                 deint_vaapi_mode_name(ctx->mode));
      } else {
          for (i = 0; i < ctx->nb_deint_caps; i++) {
              if (ctx->deint_caps[i].type == ctx->mode)
                  break;
          }
          if (i >= ctx->nb_deint_caps) {
              av_log(avctx, AV_LOG_ERROR, "Deinterlacing mode %d (%s) is "
                     "not supported.\n", ctx->mode,
                     deint_vaapi_mode_name(ctx->mode));
          }
      }
  
      params.type      = VAProcFilterDeinterlacing;
      params.algorithm = ctx->mode;
      params.flags     = 0;
  
      av_assert0(ctx->filter_buffer == VA_INVALID_ID);
      vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
                           VAProcFilterParameterBufferType,
                           sizeof(params), 1, &params,
                           &ctx->filter_buffer);
      if (vas != VA_STATUS_SUCCESS) {
          av_log(avctx, AV_LOG_ERROR, "Failed to create deinterlace "
                 "parameter buffer: %d (%s).\n", vas, vaErrorStr(vas));
          return AVERROR(EIO);
      }
  
      vas = vaQueryVideoProcPipelineCaps(ctx->hwctx->display,
                                         ctx->va_context,
                                         &ctx->filter_buffer, 1,
                                         &ctx->pipeline_caps);
      if (vas != VA_STATUS_SUCCESS) {
          av_log(avctx, AV_LOG_ERROR, "Failed to query pipeline "
                 "caps: %d (%s).\n", vas, vaErrorStr(vas));
          return AVERROR(EIO);
      }
  
      ctx->extra_delay_for_timestamps = ctx->field_rate == 2 &&
          ctx->pipeline_caps.num_backward_references == 0;
  
      ctx->queue_depth = ctx->pipeline_caps.num_backward_references +
                         ctx->pipeline_caps.num_forward_references +
                         ctx->extra_delay_for_timestamps + 1;
      if (ctx->queue_depth > MAX_REFERENCES) {
          av_log(avctx, AV_LOG_ERROR, "Pipeline requires too many "
                 "references (%u forward, %u back).\n",
                 ctx->pipeline_caps.num_forward_references,
                 ctx->pipeline_caps.num_backward_references);
          return AVERROR(ENOSYS);
      }
  
      return 0;
  }
  
  static int deint_vaapi_config_output(AVFilterLink *outlink)
  {
      AVFilterContext    *avctx = outlink->src;
      AVFilterLink      *inlink = avctx->inputs[0];
      DeintVAAPIContext    *ctx = avctx->priv;
      AVVAAPIHWConfig *hwconfig = NULL;
      AVHWFramesConstraints *constraints = NULL;
      AVVAAPIFramesContext *va_frames;
      VAStatus vas;
      int err;
  
      deint_vaapi_pipeline_uninit(avctx);
  
      av_assert0(ctx->input_frames);
      ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
      ctx->hwctx = ((AVHWDeviceContext*)ctx->device_ref->data)->hwctx;
  
      ctx->output_width  = ctx->input_frames->width;
      ctx->output_height = ctx->input_frames->height;
  
      av_assert0(ctx->va_config == VA_INVALID_ID);
      vas = vaCreateConfig(ctx->hwctx->display, VAProfileNone,
                           VAEntrypointVideoProc, 0, 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_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 "
                 "deinterlacing 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;
      }
  
      ctx->output_frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
      if (!ctx->output_frames_ref) {
          av_log(avctx, AV_LOG_ERROR, "Failed to create HW frame context "
                 "for output.\n");
          err = AVERROR(ENOMEM);
          goto fail;
      }
  
      ctx->output_frames = (AVHWFramesContext*)ctx->output_frames_ref->data;
  
      ctx->output_frames->format    = AV_PIX_FMT_VAAPI;
      ctx->output_frames->sw_format = ctx->input_frames->sw_format;
      ctx->output_frames->width     = ctx->output_width;
      ctx->output_frames->height    = ctx->output_height;
  
      // The number of output frames we need is determined by what follows
      // the filter.  If it's an encoder with complex frame reference
      // structures then this could be very high.
      ctx->output_frames->initial_pool_size = 10;
  
      err = av_hwframe_ctx_init(ctx->output_frames_ref);
      if (err < 0) {
          av_log(avctx, AV_LOG_ERROR, "Failed to initialise VAAPI frame "
                 "context for output: %d\n", err);
          goto fail;
      }
  
      va_frames = ctx->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, 0,
                            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));
          err = AVERROR(EIO);
          goto fail;
      }
  
      err = deint_vaapi_build_filter_params(avctx);
      if (err < 0)
          goto fail;
  
      outlink->w = inlink->w;
      outlink->h = inlink->h;
  
      outlink->time_base  = av_mul_q(inlink->time_base,
                                     (AVRational) { 1, ctx->field_rate });
      outlink->frame_rate = av_mul_q(inlink->frame_rate,
                                     (AVRational) { ctx->field_rate, 1 });
  
      outlink->hw_frames_ctx = av_buffer_ref(ctx->output_frames_ref);
      if (!outlink->hw_frames_ctx) {
          err = AVERROR(ENOMEM);
          goto fail;
      }
  
      av_freep(&hwconfig);
      av_hwframe_constraints_free(&constraints);
      return 0;
  
  fail:
      av_buffer_unref(&ctx->output_frames_ref);
      av_freep(&hwconfig);
      av_hwframe_constraints_free(&constraints);
      return err;
  }
  
  static int vaapi_proc_colour_standard(enum AVColorSpace av_cs)
  {
      switch(av_cs) {
  #define CS(av, va) case AVCOL_SPC_ ## av: return VAProcColorStandard ## va;
          CS(BT709,     BT709);
          CS(BT470BG,   BT470BG);
          CS(SMPTE170M, SMPTE170M);
          CS(SMPTE240M, SMPTE240M);
  #undef CS
      default:
          return VAProcColorStandardNone;
      }
  }
  
  static int deint_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
  {
      AVFilterContext   *avctx = inlink->dst;
      AVFilterLink    *outlink = avctx->outputs[0];
      DeintVAAPIContext *ctx = avctx->priv;
      AVFrame *output_frame = NULL;
      VASurfaceID input_surface, output_surface;
      VASurfaceID backward_references[MAX_REFERENCES];
      VASurfaceID forward_references[MAX_REFERENCES];
      VAProcPipelineParameterBuffer params;
      VAProcFilterParameterBufferDeinterlacing *filter_params;
      VARectangle input_region;
      VABufferID params_id;
      VAStatus vas;
      void *filter_params_addr = NULL;
      int err, i, field, current_frame_index;
  
      av_log(avctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u (%"PRId64").\n",
             av_get_pix_fmt_name(input_frame->format),
             input_frame->width, input_frame->height, input_frame->pts);
  
      if (ctx->queue_count < ctx->queue_depth) {
          ctx->frame_queue[ctx->queue_count++] = input_frame;
          if (ctx->queue_count < ctx->queue_depth) {
              // Need more reference surfaces before we can continue.
              return 0;
          }
      } else {
          av_frame_free(&ctx->frame_queue[0]);
          for (i = 0; i + 1 < ctx->queue_count; i++)
              ctx->frame_queue[i] = ctx->frame_queue[i + 1];
          ctx->frame_queue[i] = input_frame;
      }
  
      current_frame_index = ctx->pipeline_caps.num_forward_references;
  
      input_frame = ctx->frame_queue[current_frame_index];
      input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3];
      for (i = 0; i < ctx->pipeline_caps.num_forward_references; i++)
          forward_references[i] = (VASurfaceID)(uintptr_t)
              ctx->frame_queue[current_frame_index - i - 1]->data[3];
      for (i = 0; i < ctx->pipeline_caps.num_backward_references; i++)
          backward_references[i] = (VASurfaceID)(uintptr_t)
              ctx->frame_queue[current_frame_index + i + 1]->data[3];
  
      av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for "
             "deinterlace input.\n", input_surface);
      av_log(avctx, AV_LOG_DEBUG, "Backward references:");
      for (i = 0; i < ctx->pipeline_caps.num_backward_references; i++)
          av_log(avctx, AV_LOG_DEBUG, " %#x", backward_references[i]);
      av_log(avctx, AV_LOG_DEBUG, "\n");
      av_log(avctx, AV_LOG_DEBUG, "Forward  references:");
      for (i = 0; i < ctx->pipeline_caps.num_forward_references; i++)
          av_log(avctx, AV_LOG_DEBUG, " %#x", forward_references[i]);
      av_log(avctx, AV_LOG_DEBUG, "\n");
  
      for (field = 0; field < ctx->field_rate; field++) {
          output_frame = ff_get_video_buffer(outlink, ctx->output_width,
                                             ctx->output_height);
          if (!output_frame) {
              err = AVERROR(ENOMEM);
              goto fail;
          }
  
          output_surface = (VASurfaceID)(uintptr_t)output_frame->data[3];
          av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for "
                 "deinterlace output.\n", output_surface);
  
          memset(&params, 0, sizeof(params));
  
          input_region = (VARectangle) {
              .x      = 0,
              .y      = 0,
              .width  = input_frame->width,
              .height = input_frame->height,
          };
  
          params.surface = input_surface;
          params.surface_region = &input_region;
          params.surface_color_standard =
              vaapi_proc_colour_standard(input_frame->colorspace);
  
          params.output_region = NULL;
          params.output_background_color = 0xff000000;
          params.output_color_standard = params.surface_color_standard;
  
          params.pipeline_flags = 0;
          params.filter_flags   = VA_FRAME_PICTURE;
  
          if (!ctx->auto_enable || input_frame->interlaced_frame) {
              vas = vaMapBuffer(ctx->hwctx->display, ctx->filter_buffer,
                                &filter_params_addr);
              if (vas != VA_STATUS_SUCCESS) {
                  av_log(avctx, AV_LOG_ERROR, "Failed to map filter parameter "
                         "buffer: %d (%s).\n", vas, vaErrorStr(vas));
                  err = AVERROR(EIO);
                  goto fail;
              }
              filter_params = filter_params_addr;
              filter_params->flags = 0;
              if (input_frame->top_field_first) {
                  filter_params->flags |= field ? VA_DEINTERLACING_BOTTOM_FIELD : 0;
              } else {
                  filter_params->flags |= VA_DEINTERLACING_BOTTOM_FIELD_FIRST;
                  filter_params->flags |= field ? 0 : VA_DEINTERLACING_BOTTOM_FIELD;
              }
              filter_params_addr = NULL;
              vas = vaUnmapBuffer(ctx->hwctx->display, ctx->filter_buffer);
              if (vas != VA_STATUS_SUCCESS)
                  av_log(avctx, AV_LOG_ERROR, "Failed to unmap filter parameter "
                         "buffer: %d (%s).\n", vas, vaErrorStr(vas));
  
              params.filters     = &ctx->filter_buffer;
              params.num_filters = 1;
  
              params.forward_references = forward_references;
              params.num_forward_references =
                  ctx->pipeline_caps.num_forward_references;
              params.backward_references = backward_references;
              params.num_backward_references =
                  ctx->pipeline_caps.num_backward_references;
  
          } else {
              params.filters     = NULL;
              params.num_filters = 0;
          }
  
          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.
              }
          }
  
          err = av_frame_copy_props(output_frame, input_frame);
          if (err < 0)
              goto fail;
  
          if (ctx->field_rate == 2) {
              if (field == 0)
                  output_frame->pts = 2 * input_frame->pts;
              else
                  output_frame->pts = input_frame->pts +
                      ctx->frame_queue[current_frame_index + 1]->pts;
          }
          output_frame->interlaced_frame = 0;
  
          av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
                 av_get_pix_fmt_name(output_frame->format),
                 output_frame->width, output_frame->height, output_frame->pts);
  
          err = ff_filter_frame(outlink, output_frame);
          if (err < 0)
              break;
      }
  
      return err;
  
  fail_after_begin:
      vaRenderPicture(ctx->hwctx->display, ctx->va_context, &params_id, 1);
  fail_after_render:
      vaEndPicture(ctx->hwctx->display, ctx->va_context);
  fail:
      if (filter_params_addr)
          vaUnmapBuffer(ctx->hwctx->display, ctx->filter_buffer);
      av_frame_free(&output_frame);
      return err;
  }
  
  static av_cold int deint_vaapi_init(AVFilterContext *avctx)
  {
      DeintVAAPIContext *ctx = avctx->priv;
  
      ctx->va_config     = VA_INVALID_ID;
      ctx->va_context    = VA_INVALID_ID;
      ctx->filter_buffer = VA_INVALID_ID;
      ctx->valid_ids = 1;
  
      return 0;
  }
  
  static av_cold void deint_vaapi_uninit(AVFilterContext *avctx)
  {
      DeintVAAPIContext *ctx = avctx->priv;
  
      if (ctx->valid_ids)
          deint_vaapi_pipeline_uninit(avctx);
  
      av_buffer_unref(&ctx->input_frames_ref);
      av_buffer_unref(&ctx->output_frames_ref);
      av_buffer_unref(&ctx->device_ref);
  }
  
  #define OFFSET(x) offsetof(DeintVAAPIContext, x)
  #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
  static const AVOption deint_vaapi_options[] = {
      { "mode", "Deinterlacing mode",
        OFFSET(mode), AV_OPT_TYPE_INT, { .i64 = VAProcDeinterlacingNone },
        VAProcDeinterlacingNone, VAProcDeinterlacingCount - 1, FLAGS, "mode" },
      { "default", "Use the highest-numbered (and therefore possibly most advanced) deinterlacing algorithm",
        0, AV_OPT_TYPE_CONST, { .i64 = VAProcDeinterlacingNone }, .unit = "mode" },
      { "bob", "Use the bob deinterlacing algorithm",
        0, AV_OPT_TYPE_CONST, { .i64 = VAProcDeinterlacingBob }, .unit = "mode" },
      { "weave", "Use the weave deinterlacing algorithm",
        0, AV_OPT_TYPE_CONST, { .i64 = VAProcDeinterlacingWeave }, .unit = "mode" },
      { "motion_adaptive", "Use the motion adaptive deinterlacing algorithm",
        0, AV_OPT_TYPE_CONST, { .i64 = VAProcDeinterlacingMotionAdaptive }, .unit = "mode" },
      { "motion_compensated", "Use the motion compensated deinterlacing algorithm",
        0, AV_OPT_TYPE_CONST, { .i64 = VAProcDeinterlacingMotionCompensated }, .unit = "mode" },
  
      { "rate", "Generate output at frame rate or field rate",
        OFFSET(field_rate), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 2, FLAGS, "rate" },
      { "frame", "Output at frame rate (one frame of output for each field-pair)",
        0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .unit = "rate" },
      { "field", "Output at field rate (one frame of output for each field)",
        0, AV_OPT_TYPE_CONST, { .i64 = 2 }, .unit = "rate" },
  
      { "auto", "Only deinterlace fields, passing frames through unchanged",
        OFFSET(auto_enable), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
  
      { NULL },
  };
  
  static const AVClass deint_vaapi_class = {
      .class_name = "deinterlace_vaapi",
      .item_name  = av_default_item_name,
      .option     = deint_vaapi_options,
      .version    = LIBAVUTIL_VERSION_INT,
  };
  
  static const AVFilterPad deint_vaapi_inputs[] = {
      {
          .name         = "default",
          .type         = AVMEDIA_TYPE_VIDEO,
          .filter_frame = &deint_vaapi_filter_frame,
          .config_props = &deint_vaapi_config_input,
      },
      { NULL }
  };
  
  static const AVFilterPad deint_vaapi_outputs[] = {
      {
          .name = "default",
          .type = AVMEDIA_TYPE_VIDEO,
          .config_props = &deint_vaapi_config_output,
      },
      { NULL }
  };
  
  AVFilter ff_vf_deinterlace_vaapi = {
      .name           = "deinterlace_vaapi",
      .description    = NULL_IF_CONFIG_SMALL("Deinterlacing of VAAPI surfaces"),
      .priv_size      = sizeof(DeintVAAPIContext),
      .init           = &deint_vaapi_init,
      .uninit         = &deint_vaapi_uninit,
      .query_formats  = &deint_vaapi_query_formats,
      .inputs         = deint_vaapi_inputs,
      .outputs        = deint_vaapi_outputs,
      .priv_class     = &deint_vaapi_class,
      .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
  };
  