text: /*
   * 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;
      unsigned int ref_idx;
      AVBufferRef *idx_ref;
      AVBufferRef *ref_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;
      uint8_t      *bitstream_internal;
  
      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_start_frame_sep_ref(AVCodecContext *avctx, AVFrame *frame, int has_sep_ref);
  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 */
  