/*
  * AVFrame wrapper
  * Copyright (c) 2015 Luca Barbato
  *

  * 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
  * Simple wrapper to store an AVFrame and forward it as AVPacket.
  */
 
 #include "avcodec.h"

 #include "decode.h"

 #include "internal.h"
 
 #include "libavutil/internal.h"
 #include "libavutil/frame.h"
 #include "libavutil/buffer.h"
 #include "libavutil/pixdesc.h"
 
 static void wrapped_avframe_release_buffer(void *unused, uint8_t *data)
 {
     AVFrame *frame = (AVFrame *)data;
 
     av_frame_free(&frame);
 }
 
 static int wrapped_avframe_encode(AVCodecContext *avctx, AVPacket *pkt,
                      const AVFrame *frame, int *got_packet)
 {
     AVFrame *wrapped = av_frame_clone(frame);

     uint8_t *data;
     int size = sizeof(*wrapped) + AV_INPUT_BUFFER_PADDING_SIZE;

 
     if (!wrapped)
         return AVERROR(ENOMEM);
 

     data = av_mallocz(size);
     if (!data) {
         av_frame_free(&wrapped);
         return AVERROR(ENOMEM);
     }
 
     pkt->buf = av_buffer_create(data, size,

                                 wrapped_avframe_release_buffer, NULL,
                                 AV_BUFFER_FLAG_READONLY);
     if (!pkt->buf) {
         av_frame_free(&wrapped);

         av_freep(&data);

         return AVERROR(ENOMEM);
     }
 

     av_frame_move_ref((AVFrame*)data, wrapped);
     av_frame_free(&wrapped);
 
     pkt->data = data;

     pkt->size = sizeof(*wrapped);
 
     pkt->flags |= AV_PKT_FLAG_KEY;
     *got_packet = 1;
     return 0;
 }
 

 static int wrapped_avframe_decode(AVCodecContext *avctx, void *data,
                                   int *got_frame, AVPacket *pkt)
 {
     AVFrame *in, *out;
     int err;
 
     if (!(pkt->flags & AV_PKT_FLAG_TRUSTED)) {
         // This decoder is not usable with untrusted input.
         return AVERROR(EPERM);
     }
 
     if (pkt->size < sizeof(AVFrame))
         return AVERROR(EINVAL);
 
     in  = (AVFrame*)pkt->data;
     out = data;
 
     err = ff_decode_frame_props(avctx, out);
     if (err < 0)
         return err;
 
     av_frame_move_ref(out, in);
 

     err = ff_attach_decode_data(out);
     if (err < 0) {
         av_frame_unref(out);
         return err;
     }
 

     *got_frame = 1;
     return 0;
 }
 

 AVCodec ff_wrapped_avframe_encoder = {
     .name           = "wrapped_avframe",
     .long_name      = NULL_IF_CONFIG_SMALL("AVFrame to AVPacket passthrough"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_WRAPPED_AVFRAME,
     .encode2        = wrapped_avframe_encode,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };

 
 AVCodec ff_wrapped_avframe_decoder = {
     .name           = "wrapped_avframe",
     .long_name      = NULL_IF_CONFIG_SMALL("AVPacket to AVFrame passthrough"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_WRAPPED_AVFRAME,
     .decode         = wrapped_avframe_decode,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
 };