/*
  * 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_VT_INTERNAL_H
 #define AVCODEC_VT_INTERNAL_H

 
 typedef struct VTContext {
     // The current bitstream buffer.
     uint8_t                     *bitstream;
 
     // The current size of the bitstream.
     int                         bitstream_size;
 
     // The reference size used for fast reallocation.
     int                         allocated_size;
 
     // The core video buffer
     CVImageBufferRef            frame;

 
     // Current dummy frames context (depends on exact CVImageBufferRef params).
     struct AVBufferRef         *cached_hw_frames_ctx;
 
     // Non-NULL if the new hwaccel API is used. This is only a separate struct
     // to ease compatibility with the old API.
     struct AVVideotoolboxContext *vt_ctx;

 
     // Current H264 parameters (used to trigger decoder restart on SPS changes).

     uint8_t                     sps[3];

     bool                        reconfig_needed;

 } VTContext;
 
 int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame);
 int ff_videotoolbox_uninit(AVCodecContext *avctx);
 int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx,
                                      const uint8_t *buffer,
                                      uint32_t size);
 int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx,
                                       const uint8_t *buffer,
                                       uint32_t size);
 CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx);

 CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx);

 
 #endif /* AVCODEC_VT_INTERNAL_H */