/*
  * HW decode acceleration through NVDEC
  *
  * Copyright (c) 2016 Anton Khirnov
  *

  * 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

  */
 
 #ifndef AVCODEC_NVDEC_H
 #define AVCODEC_NVDEC_H
 
 #include "compat/cuda/dynlink_loader.h"
 
 #include <stdint.h>
 
 #include "libavutil/buffer.h"
 #include "libavutil/frame.h"
 
 #include "avcodec.h"
 

 #if defined(NVDECAPI_MAJOR_VERSION) && defined(NVDECAPI_MINOR_VERSION)
 # define NVDECAPI_CHECK_VERSION(major, minor) \
     ((major) < NVDECAPI_MAJOR_VERSION || ((major) == NVDECAPI_MAJOR_VERSION && (minor) <= NVDECAPI_MINOR_VERSION))
 #else
 /* version macros were added in SDK 8.1 ffnvcodec */
 # define NVDECAPI_CHECK_VERSION(major, minor) \
     ((major) < 8 || ((major) == 8 && (minor) <= 0))
 #endif
 

 typedef struct NVDECFrame {
     unsigned int idx;
     AVBufferRef *idx_ref;
     AVBufferRef *decoder_ref;
 } NVDECFrame;
 
 typedef struct NVDECContext {
     CUVIDPICPARAMS pic_params;
 
     AVBufferPool *decoder_pool;
 
     AVBufferRef  *decoder_ref;
 
     uint8_t      *bitstream;
     int           bitstream_len;
     unsigned int  bitstream_allocated;
 
     unsigned     *slice_offsets;
     int           nb_slices;
     unsigned int  slice_offsets_allocated;

 
     int           supports_444;

 } NVDECContext;
 

 int ff_nvdec_decode_init(AVCodecContext *avctx);

 int ff_nvdec_decode_uninit(AVCodecContext *avctx);
 int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame);
 int ff_nvdec_end_frame(AVCodecContext *avctx);

 int ff_nvdec_simple_end_frame(AVCodecContext *avctx);
 int ff_nvdec_simple_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
                                  uint32_t size);

 int ff_nvdec_frame_params(AVCodecContext *avctx,
                           AVBufferRef *hw_frames_ctx,

                           int dpb_size,
                           int supports_444);

 int ff_nvdec_get_ref_idx(AVFrame *frame);

 
 #endif /* AVCODEC_NVDEC_H */