text: /*
   * 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 AVFILTER_AVCODEC_H
  #define AVFILTER_AVCODEC_H
  
  /**
   * @file
   * libavcodec/libavfilter gluing utilities
   *
   * This should be included in an application ONLY if the installed
   * libavfilter has been compiled with libavcodec support, otherwise
   * symbols defined below will not be available.
   */
  
  #include "libavcodec/avcodec.h" // AVFrame
  #include "avfilter.h"
  #include "vsrc_buffer.h"
  
  /**
   * Copy the frame properties of src to dst, without copying the actual
   * image data.
   *
   * @return 0 on success, a negative number on error.
   */
  int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src);
  
  /**
   * Copy the frame properties and data pointers of src to dst, without copying
   * the actual data.
   *
   * @return 0 on success, a negative number on error.
   */
  int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src);
  
  /**
   * Create and return a picref reference from the data and properties
   * contained in frame.
   *
   * @param perms permissions to assign to the new buffer reference
   */
  AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame, int perms);
  
  
  /**
   * Create and return a picref reference from the data and properties
   * contained in frame.
   *
   * @param perms permissions to assign to the new buffer reference
   */
  AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
                                                              int perms);
  
  #ifdef FF_API_FILL_FRAME
  /**
   * Fill an AVFrame with the information stored in samplesref.
   *
   * @param frame an already allocated AVFrame
   * @param samplesref an audio buffer reference
   * @return 0 in case of success, a negative AVERROR code in case of
   * failure
   * @deprecated Use avfilter_copy_buf_props() instead.
   */
  attribute_deprecated
  int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,
                                                const AVFilterBufferRef *samplesref);
  
  /**
   * Fill an AVFrame with the information stored in picref.
   *
   * @param frame an already allocated AVFrame
   * @param picref a video buffer reference
   * @return 0 in case of success, a negative AVERROR code in case of
   * failure
   * @deprecated Use avfilter_copy_buf_props() instead.
   */
  attribute_deprecated
  int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,
                                                const AVFilterBufferRef *picref);
  
  /**
   * Fill an AVFrame with information stored in ref.
   *
   * @param frame an already allocated AVFrame
   * @param ref a video or audio buffer reference
   * @return 0 in case of success, a negative AVERROR code in case of
   * failure
   * @deprecated Use avfilter_copy_buf_props() instead.
   */
  attribute_deprecated
  int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
                                          const AVFilterBufferRef *ref);
  #endif
  
  /**
   * Add frame data to buffer_src.
   *
   * @param buffer_src  pointer to a buffer source context
   * @param frame       a frame, or NULL to mark EOF
   * @param flags       a combination of AV_BUFFERSRC_FLAG_*
   * @return            >= 0 in case of success, a negative AVERROR code
   *                    in case of failure
   */
  int av_buffersrc_add_frame(AVFilterContext *buffer_src,
                             const AVFrame *frame, int flags);
  
  /**
   * Add frame data to buffer_src.
   *
   * @param buffer_src pointer to a buffer source context
   * @param flags a combination of AV_VSRC_BUF_FLAG_* flags
   * @return >= 0 in case of success, a negative AVERROR code in case of
   * failure
   */
  int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
                               const AVFrame *frame, int flags);
  
  #endif /* AVFILTER_AVCODEC_H */
  