/*

  * Copyright 2011 Stefano Sabatini | stefasab at gmail.com
  *

  * 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
  */
 
 /**
  * @file
  * libavcodec/libavfilter gluing utilities
  */
 
 #include "avcodec.h"

 #include "libavutil/avassert.h"

 #include "libavutil/channel_layout.h"

 #include "libavutil/opt.h"

 #if FF_API_AVFILTERBUFFER

 AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
                                                             int perms)
 {
     AVFilterBufferRef *picref =
         avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
                                                   frame->width, frame->height,
                                                   frame->format);
     if (!picref)
         return NULL;

     if (avfilter_copy_frame_props(picref, frame) < 0) {
         picref->buf->data[0] = NULL;
         avfilter_unref_bufferp(&picref);
     }

     return picref;
 }

 AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
                                                             int perms)
 {

     AVFilterBufferRef *samplesref;

     int channels = av_frame_get_channels(frame);

     int64_t layout = av_frame_get_channel_layout(frame);

     if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) {

         av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");

         return NULL;
     }
 

     samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels(

         (uint8_t **)frame->extended_data, frame->linesize[0], perms,

         frame->nb_samples, frame->format, channels, layout);

     if (!samplesref)

         return NULL;

     if (avfilter_copy_frame_props(samplesref, frame) < 0) {
         samplesref->buf->data[0] = NULL;
         avfilter_unref_bufferp(&samplesref);
     }

     return samplesref;

 }
 

 AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type,
                                                       const AVFrame *frame,
                                                       int perms)
 {
     switch (type) {
     case AVMEDIA_TYPE_VIDEO:
         return avfilter_get_video_buffer_ref_from_frame(frame, perms);
     case AVMEDIA_TYPE_AUDIO:
         return avfilter_get_audio_buffer_ref_from_frame(frame, perms);
     default:
         return NULL;
     }
 }
 

 int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
 {
     int planes, nb_channels;
 

     if (!dst)
         return AVERROR(EINVAL);
     /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */
     av_assert0(src);
 

     memcpy(dst->data, src->data, sizeof(dst->data));
     memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
 
     dst->pts     = src->pts;
     dst->format  = src->format;

     av_frame_set_pkt_pos(dst, src->pos);

 
     switch (src->type) {
     case AVMEDIA_TYPE_VIDEO:

         av_assert0(src->video);

         dst->width               = src->video->w;
         dst->height              = src->video->h;
         dst->sample_aspect_ratio = src->video->sample_aspect_ratio;
         dst->interlaced_frame    = src->video->interlaced;
         dst->top_field_first     = src->video->top_field_first;
         dst->key_frame           = src->video->key_frame;
         dst->pict_type           = src->video->pict_type;
         break;
     case AVMEDIA_TYPE_AUDIO:

         av_assert0(src->audio);

         nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
         planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
 
         if (planes > FF_ARRAY_ELEMS(dst->data)) {

             dst->extended_data = av_mallocz_array(planes, sizeof(*dst->extended_data));

             if (!dst->extended_data)
                 return AVERROR(ENOMEM);
             memcpy(dst->extended_data, src->extended_data,

                    planes * sizeof(*dst->extended_data));

         } else
             dst->extended_data = dst->data;
         dst->nb_samples          = src->audio->nb_samples;

         av_frame_set_sample_rate   (dst, src->audio->sample_rate);
         av_frame_set_channel_layout(dst, src->audio->channel_layout);

         av_frame_set_channels      (dst, src->audio->channels);

         break;
     default:
         return AVERROR(EINVAL);
     }
 
     return 0;
 }

 #endif

 #if FF_API_FILL_FRAME

 int avfilter_fill_frame_from_audio_buffer_ref(AVFrame *frame,
                                               const AVFilterBufferRef *samplesref)
 {

     return avfilter_copy_buf_props(frame, samplesref);

 }
 

 int avfilter_fill_frame_from_video_buffer_ref(AVFrame *frame,
                                               const AVFilterBufferRef *picref)
 {

     return avfilter_copy_buf_props(frame, picref);

 }

 
 int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
                                         const AVFilterBufferRef *ref)
 {

     return avfilter_copy_buf_props(frame, ref);

 }

 #endif