/*
  * 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/mem.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "vaapi_vpp.h"
 
 // Denoise min/max/default Values
 #define DENOISE_MIN            0
 #define DENOISE_MAX            64
 #define DENOISE_DEFAULT        0
 
 // Sharpness min/max/default values
 #define SHARPNESS_MIN          0
 #define SHARPNESS_MAX          64
 #define SHARPNESS_DEFAULT      44
 
 typedef struct DenoiseVAAPIContext {

     VAAPIVPPContext vpp_ctx; // must be the first field

 
     int denoise;         // enable denoise algo.
 } DenoiseVAAPIContext;
 
 typedef struct SharpnessVAAPIContext {

     VAAPIVPPContext vpp_ctx; // must be the first field

 
     int sharpness;       // enable sharpness.
 } SharpnessVAAPIContext;
 
 static float map(int x, int in_min, int in_max, float out_min, float out_max)
 {
     double slope, output;
 
     slope = 1.0 * (out_max - out_min) / (in_max - in_min);
     output = out_min + slope * (x - in_min);
 
     return (float)output;
 }
 
 static int denoise_vaapi_build_filter_params(AVFilterContext *avctx)
 {
     VAAPIVPPContext *vpp_ctx = avctx->priv;
     DenoiseVAAPIContext *ctx = avctx->priv;
 
     VAProcFilterCap caps;
 
     VAStatus vas;
     uint32_t num_caps = 1;
 
     VAProcFilterParameterBuffer denoise;
 

     vas = vaQueryVideoProcFilterCaps(vpp_ctx->hwctx->display, vpp_ctx->va_context,
                                      VAProcFilterNoiseReduction,
                                      &caps, &num_caps);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to query denoise caps "
                "context: %d (%s).\n", vas, vaErrorStr(vas));
         return AVERROR(EIO);

     }
 

     denoise.type  = VAProcFilterNoiseReduction;
     denoise.value =  map(ctx->denoise, DENOISE_MIN, DENOISE_MAX,
                          caps.range.min_value,
                          caps.range.max_value);

     return ff_vaapi_vpp_make_param_buffers(avctx,
                                            VAProcFilterParameterBufferType,
                                            &denoise, sizeof(denoise), 1);

 }
 
 static int sharpness_vaapi_build_filter_params(AVFilterContext *avctx)
 {
     VAAPIVPPContext *vpp_ctx   = avctx->priv;
     SharpnessVAAPIContext *ctx = avctx->priv;
 
     VAProcFilterCap caps;
 
     VAStatus vas;
     uint32_t num_caps = 1;
 
     VAProcFilterParameterBuffer sharpness;
 

     vas = vaQueryVideoProcFilterCaps(vpp_ctx->hwctx->display, vpp_ctx->va_context,
                                      VAProcFilterSharpening,
                                      &caps, &num_caps);
     if (vas != VA_STATUS_SUCCESS) {
         av_log(avctx, AV_LOG_ERROR, "Failed to query sharpness caps "
                "context: %d (%s).\n", vas, vaErrorStr(vas));
         return AVERROR(EIO);

     }
 

     sharpness.type  = VAProcFilterSharpening;
     sharpness.value = map(ctx->sharpness,
                           SHARPNESS_MIN, SHARPNESS_MAX,
                           caps.range.min_value,
                           caps.range.max_value);

     return ff_vaapi_vpp_make_param_buffers(avctx,
                                            VAProcFilterParameterBufferType,
                                            &sharpness, sizeof(sharpness), 1);

 }
 
 static int misc_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
 {
     AVFilterContext *avctx   = inlink->dst;
     AVFilterLink *outlink    = avctx->outputs[0];
     VAAPIVPPContext *vpp_ctx = avctx->priv;
     AVFrame *output_frame    = NULL;
     VAProcPipelineParameterBuffer params;
     int err;
 
     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 (vpp_ctx->va_context == VA_INVALID_ID)
         return AVERROR(EINVAL);
 
     output_frame = ff_get_video_buffer(outlink, vpp_ctx->output_width,
                                        vpp_ctx->output_height);
     if (!output_frame) {
         err = AVERROR(ENOMEM);
         goto fail;
     }
 

     err = av_frame_copy_props(output_frame, input_frame);
     if (err < 0)

         goto fail;

     err = ff_vaapi_vpp_init_params(avctx, &params,
                                    input_frame, output_frame);
     if (err < 0)
         goto fail;

 
     if (vpp_ctx->nb_filter_buffers) {
         params.filters     = &vpp_ctx->filter_buffers[0];
         params.num_filters = vpp_ctx->nb_filter_buffers;
     }
 

     err = ff_vaapi_vpp_render_picture(avctx, &params, output_frame);

     if (err < 0)
         goto fail;
 
     av_frame_free(&input_frame);
 
     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);
 
     return ff_filter_frame(outlink, output_frame);
 
 fail:
     av_frame_free(&input_frame);
     av_frame_free(&output_frame);
     return err;
 }
 
 static av_cold int denoise_vaapi_init(AVFilterContext *avctx)
 {
     VAAPIVPPContext *vpp_ctx = avctx->priv;
 
     ff_vaapi_vpp_ctx_init(avctx);
     vpp_ctx->pipeline_uninit     = ff_vaapi_vpp_pipeline_uninit;
     vpp_ctx->build_filter_params = denoise_vaapi_build_filter_params;
     vpp_ctx->output_format       = AV_PIX_FMT_NONE;
 
     return 0;
 }
 
 static av_cold int sharpness_vaapi_init(AVFilterContext *avctx)
 {
     VAAPIVPPContext *vpp_ctx = avctx->priv;
 
     ff_vaapi_vpp_ctx_init(avctx);
     vpp_ctx->pipeline_uninit     = ff_vaapi_vpp_pipeline_uninit;
     vpp_ctx->build_filter_params = sharpness_vaapi_build_filter_params;
     vpp_ctx->output_format       = AV_PIX_FMT_NONE;
 
     return 0;
 }
 
 #define DOFFSET(x) offsetof(DenoiseVAAPIContext, x)

 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)

 static const AVOption denoise_vaapi_options[] = {
     { "denoise", "denoise level",
       DOFFSET(denoise), AV_OPT_TYPE_INT, { .i64 = DENOISE_DEFAULT }, DENOISE_MIN, DENOISE_MAX, .flags = FLAGS },
     { NULL },
 };
 
 #define SOFFSET(x) offsetof(SharpnessVAAPIContext, x)
 static const AVOption sharpness_vaapi_options[] = {
     { "sharpness", "sharpness level",
       SOFFSET(sharpness), AV_OPT_TYPE_INT, { .i64 = SHARPNESS_DEFAULT }, SHARPNESS_MIN, SHARPNESS_MAX, .flags = FLAGS },
     { NULL },
 };
 
 AVFILTER_DEFINE_CLASS(denoise_vaapi);
 AVFILTER_DEFINE_CLASS(sharpness_vaapi);
 
 static const AVFilterPad misc_vaapi_inputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
         .filter_frame = &misc_vaapi_filter_frame,
         .config_props = &ff_vaapi_vpp_config_input,
     },
     { NULL }
 };
 
 static const AVFilterPad misc_vaapi_outputs[] = {
     {
         .name = "default",
         .type = AVMEDIA_TYPE_VIDEO,
         .config_props = &ff_vaapi_vpp_config_output,
     },
     { NULL }
 };
 
 AVFilter ff_vf_denoise_vaapi = {
     .name          = "denoise_vaapi",
     .description   = NULL_IF_CONFIG_SMALL("VAAPI VPP for de-noise"),
     .priv_size     = sizeof(DenoiseVAAPIContext),
     .init          = &denoise_vaapi_init,
     .uninit        = &ff_vaapi_vpp_ctx_uninit,
     .query_formats = &ff_vaapi_vpp_query_formats,
     .inputs        = misc_vaapi_inputs,
     .outputs       = misc_vaapi_outputs,
     .priv_class    = &denoise_vaapi_class,
     .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
 };
 
 AVFilter ff_vf_sharpness_vaapi = {
     .name          = "sharpness_vaapi",
     .description   = NULL_IF_CONFIG_SMALL("VAAPI VPP for sharpness"),
     .priv_size     = sizeof(SharpnessVAAPIContext),
     .init          = &sharpness_vaapi_init,
     .uninit        = &ff_vaapi_vpp_ctx_uninit,
     .query_formats = &ff_vaapi_vpp_query_formats,
     .inputs        = misc_vaapi_inputs,
     .outputs       = misc_vaapi_outputs,
     .priv_class    = &sharpness_vaapi_class,
     .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
 };