libavcodec/null_bsf.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 /**
  20  * @file
  21  * Null bitstream filter -- pass the input through unchanged.
  22  */
  23
  24 #include "avcodec.h"
  25 #include "bsf.h"
  26
  27 static int null_filter(AVBSFContext *ctx, AVPacket *out)
  28 {
  29     AVPacket *in;
  30     int ret;
  31
  32     ret = ff_bsf_get_packet(ctx, &in);
  33     if (ret < 0)
  34         return ret;
  35     av_packet_move_ref(out, in);
  36     av_packet_free(&in);
  37     return 0;
  38 }
  39
  40 const AVBitStreamFilter ff_null_bsf = {
  41     .name           = "null",
  42     .filter         = null_filter,
  43 };