libavcodec/wrapped_avframe.c

   1 /*
   2  * AVFrame wrapper
   3  * Copyright (c) 2015 Luca Barbato
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * Simple wrapper to store an AVFrame and forward it as AVPacket.
  25  */
  26
  27 #include "avcodec.h"
  28 #include "internal.h"
  29
  30 #include "libavutil/internal.h"
  31 #include "libavutil/frame.h"
  32 #include "libavutil/buffer.h"
  33 #include "libavutil/pixdesc.h"
  34
  35 static void wrapped_avframe_release_buffer(void *unused, uint8_t *data)
  36 {
  37     AVFrame *frame = (AVFrame *)data;
  38
  39     av_frame_free(&frame);
  40 }
  41
  42 static int wrapped_avframe_encode(AVCodecContext *avctx, AVPacket *pkt,
  43                      const AVFrame *frame, int *got_packet)
  44 {
  45     AVFrame *wrapped = av_frame_clone(frame);
  46
  47     if (!wrapped)
  48         return AVERROR(ENOMEM);
  49
  50     pkt->buf = av_buffer_create((uint8_t *)wrapped, sizeof(*wrapped),
  51                                 wrapped_avframe_release_buffer, NULL,
  52                                 AV_BUFFER_FLAG_READONLY);
  53     if (!pkt->buf) {
  54         av_frame_free(&wrapped);
  55         return AVERROR(ENOMEM);
  56     }
  57
  58     pkt->data = (uint8_t *)wrapped;
  59     pkt->size = sizeof(*wrapped);
  60
  61     pkt->flags |= AV_PKT_FLAG_KEY;
  62     *got_packet = 1;
  63     return 0;
  64 }
  65
  66 AVCodec ff_wrapped_avframe_encoder = {
  67     .name           = "wrapped_avframe",
  68     .long_name      = NULL_IF_CONFIG_SMALL("AVFrame to AVPacket passthrough"),
  69     .type           = AVMEDIA_TYPE_VIDEO,
  70     .id             = AV_CODEC_ID_WRAPPED_AVFRAME,
  71     .encode2        = wrapped_avframe_encode,
  72     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
  73 };