/*
  * VC1 HW decode acceleration through NVDEC
  *
  * Copyright (c) 2017 Philip Langdale
  *
  * 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 "avcodec.h"
 #include "nvdec.h"
 #include "decode.h"
 #include "vc1.h"
 
 static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 {
     VC1Context *v = avctx->priv_data;
     MpegEncContext *s = &v->s;
 
     NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
     CUVIDPICPARAMS     *pp = &ctx->pic_params;
     FrameDecodeData *fdd;
     NVDECFrame *cf;
     AVFrame *cur_frame = s->current_picture.f;
 
     int ret;
 
     ret = ff_nvdec_start_frame(avctx, cur_frame);
     if (ret < 0)
         return ret;
 
     fdd = (FrameDecodeData*)cur_frame->private_ref->data;
     cf  = (NVDECFrame*)fdd->hwaccel_priv;
 
     *pp = (CUVIDPICPARAMS) {
         .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
         .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
         .CurrPicIdx        = cf->idx,
         .field_pic_flag    = v->field_mode,
         .bottom_field_flag = v->cur_field_type,
         .second_field      = v->second_field,
 
         .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I ||
                              s->pict_type == AV_PICTURE_TYPE_BI,
         .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
                              s->pict_type == AV_PICTURE_TYPE_P,
 
         .CodecSpecific.vc1 = {

             .ForwardRefIdx     = ff_nvdec_get_ref_idx(s->last_picture.f),
             .BackwardRefIdx    = ff_nvdec_get_ref_idx(s->next_picture.f),

             .FrameWidth        = cur_frame->width,
             .FrameHeight       = cur_frame->height,
 
             .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I ||
                                  s->pict_type == AV_PICTURE_TYPE_BI,
             .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
                                  s->pict_type == AV_PICTURE_TYPE_P,
             .progressive_fcm   = v->fcm == 0,
 
             .profile           = v->profile,
             .postprocflag      = v->postprocflag,
             .pulldown          = v->broadcast,
             .interlace         = v->interlace,
             .tfcntrflag        = v->tfcntrflag,
             .finterpflag       = v->finterpflag,
             .psf               = v->psf,
             .multires          = v->multires,
             .syncmarker        = v->resync_marker,
             .rangered          = v->rangered,
             .maxbframes        = s->max_b_frames,
 
             .panscan_flag      = v->panscanflag,
             .refdist_flag      = v->refdist_flag,
             .extended_mv       = v->extended_mv,
             .dquant            = v->dquant,
             .vstransform       = v->vstransform,
             .loopfilter        = v->s.loop_filter,
             .fastuvmc          = v->fastuvmc,
             .overlap           = v->overlap,
             .quantizer         = v->quantizer_mode,
             .extended_dmv      = v->extended_dmv,
             .range_mapy_flag   = v->range_mapy_flag,
             .range_mapy        = v->range_mapy,
             .range_mapuv_flag  = v->range_mapuv_flag,
             .range_mapuv       = v->range_mapuv,
             .rangeredfrm       = v->rangeredfrm,
         }
     };
 
     return 0;
 }
 
 static int nvdec_vc1_frame_params(AVCodecContext *avctx,
                                   AVBufferRef *hw_frames_ctx)
 {
     // Each frame can at most have one P and one B reference
     return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2);
 }
 

 const AVHWAccel ff_vc1_nvdec_hwaccel = {

     .name                 = "vc1_nvdec",
     .type                 = AVMEDIA_TYPE_VIDEO,
     .id                   = AV_CODEC_ID_VC1,
     .pix_fmt              = AV_PIX_FMT_CUDA,
     .start_frame          = nvdec_vc1_start_frame,

     .end_frame            = ff_nvdec_simple_end_frame,
     .decode_slice         = ff_nvdec_simple_decode_slice,

     .frame_params         = nvdec_vc1_frame_params,
     .init                 = ff_nvdec_decode_init,
     .uninit               = ff_nvdec_decode_uninit,
     .priv_data_size       = sizeof(NVDECContext),
 };
 
 #if CONFIG_WMV3_NVDEC_HWACCEL

 const AVHWAccel ff_wmv3_nvdec_hwaccel = {

     .name                 = "wmv3_nvdec",
     .type                 = AVMEDIA_TYPE_VIDEO,
     .id                   = AV_CODEC_ID_WMV3,
     .pix_fmt              = AV_PIX_FMT_CUDA,
     .start_frame          = nvdec_vc1_start_frame,

     .end_frame            = ff_nvdec_simple_end_frame,
     .decode_slice         = ff_nvdec_simple_decode_slice,

     .frame_params         = nvdec_vc1_frame_params,
     .init                 = ff_nvdec_decode_init,
     .uninit               = ff_nvdec_decode_uninit,
     .priv_data_size       = sizeof(NVDECContext),
 };
 #endif