libavformat/framecrcenc.c

   1 /*
   2  * frame CRC encoder (for codec/format testing)
   3  * Copyright (c) 2002 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/adler32.h"
  23 #include "avformat.h"
  24
  25 static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  26 {
  27     uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
  28     char buf[256];
  29
  30     snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc);
  31     put_buffer(s->pb, buf, strlen(buf));
  32     put_flush_packet(s->pb);
  33     return 0;
  34 }
  35
  36 AVOutputFormat framecrc_muxer = {
  37     "framecrc",
  38     NULL_IF_CONFIG_SMALL("framecrc testing format"),
  39     NULL,
  40     "",
  41     0,
  42     CODEC_ID_PCM_S16LE,
  43     CODEC_ID_RAWVIDEO,
  44     NULL,
  45     framecrc_write_packet,
  46     NULL,
  47 };