/*

  * Copyright Stefano Sabatini <stefasab gmail com>
  * Copyright Anton Khirnov <anton khirnov net>
  * Copyright Michael Niedermayer <michaelni gmx at>
  *

  * 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 "libavutil/channel_layout.h"

 #include "libavutil/avassert.h"

 #include "libavutil/common.h"

 #include "libavutil/imgutils.h"

 #include "libavcodec/avcodec.h"
 
 #include "avfilter.h"
 #include "internal.h"

 #include "audio.h"

 #include "avcodec.h"

 
 void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
 {
     if (ptr->extended_data != ptr->data)
         av_freep(&ptr->extended_data);
     av_free(ptr->data[0]);
     av_free(ptr);
 }
 

 static void copy_video_props(AVFilterBufferRefVideoProps *dst, AVFilterBufferRefVideoProps *src) {
     *dst = *src;
     if (src->qp_table) {

         int qsize = src->qp_table_size;

         dst->qp_table = av_malloc(qsize);
         memcpy(dst->qp_table, src->qp_table, qsize);
     }
 }
 

 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
 {
     AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
     if (!ret)
         return NULL;
     *ret = *ref;

 
     ret->metadata = NULL;
     av_dict_copy(&ret->metadata, ref->metadata, 0);
 

     if (ref->type == AVMEDIA_TYPE_VIDEO) {
         ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
         if (!ret->video) {
             av_free(ret);
             return NULL;
         }

         copy_video_props(ret->video, ref->video);

         ret->extended_data = ret->data;
     } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
         ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
         if (!ret->audio) {
             av_free(ret);
             return NULL;
         }
         *ret->audio = *ref->audio;
 

         if (ref->extended_data && ref->extended_data != ref->data) {

             int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
             if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) *
                                                  nb_channels))) {
                 av_freep(&ret->audio);
                 av_freep(&ret);
                 return NULL;
             }
             memcpy(ret->extended_data, ref->extended_data,
                    sizeof(*ret->extended_data) * nb_channels);
         } else
             ret->extended_data = ret->data;
     }
     ret->perms &= pmask;
     ret->buf->refcount ++;
     return ret;
 }
 
 void avfilter_unref_buffer(AVFilterBufferRef *ref)
 {
     if (!ref)
         return;

     av_assert0(ref->buf->refcount > 0);

     if (!(--ref->buf->refcount))
         ref->buf->free(ref->buf);
     if (ref->extended_data != ref->data)
         av_freep(&ref->extended_data);

     if (ref->video)
         av_freep(&ref->video->qp_table);

     av_freep(&ref->video);
     av_freep(&ref->audio);

     av_dict_free(&ref->metadata);

     av_free(ref);
 }
 

 void avfilter_unref_bufferp(AVFilterBufferRef **ref)
 {
     avfilter_unref_buffer(*ref);
     *ref = NULL;
 }
 

 int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
 {
     dst->pts    = src->pts;

     dst->pos    = av_frame_get_pkt_pos(src);

     dst->format = src->format;
 

     av_dict_free(&dst->metadata);
     av_dict_copy(&dst->metadata, av_frame_get_metadata(src), 0);
 

     switch (dst->type) {
     case AVMEDIA_TYPE_VIDEO:
         dst->video->w                   = src->width;
         dst->video->h                   = src->height;

         dst->video->sample_aspect_ratio = src->sample_aspect_ratio;

         dst->video->interlaced          = src->interlaced_frame;
         dst->video->top_field_first     = src->top_field_first;
         dst->video->key_frame           = src->key_frame;
         dst->video->pict_type           = src->pict_type;
         break;
     case AVMEDIA_TYPE_AUDIO:
         dst->audio->sample_rate         = src->sample_rate;
         dst->audio->channel_layout      = src->channel_layout;
         break;
     default:
         return AVERROR(EINVAL);
     }
 
     return 0;
 }
 
 void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src)
 {
     // copy common properties
     dst->pts             = src->pts;
     dst->pos             = src->pos;
 
     switch (src->type) {

     case AVMEDIA_TYPE_VIDEO: {
         if (dst->video->qp_table)
             av_freep(&dst->video->qp_table);

         copy_video_props(dst->video, src->video);

         break;
     }

     case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;
     default: break;
     }

 
     av_dict_free(&dst->metadata);
     av_dict_copy(&dst->metadata, src->metadata, 0);

 }