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framecrcenc.c
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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 "libavutil/avstring.h"
24 #include "avformat.h"
25 #include "internal.h"
26 
28 {
29  uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
30  char buf[256];
31 
32  snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8d, %8d, 0x%08x",
33  pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
34  if (pkt->flags != AV_PKT_FLAG_KEY)
35  av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
36  if (pkt->side_data_elems) {
37  int i, j;
38  av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
39 
40  for (i=0; i<pkt->side_data_elems; i++) {
41  uint32_t side_data_crc = 0;
42  if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) {
43  for (j=0; j<pkt->side_data[i].size; j++) {
44  side_data_crc = av_adler32_update(side_data_crc,
45  pkt->side_data[i].data + (j^3),
46  1);
47  }
48  } else {
49  side_data_crc = av_adler32_update(0,
50  pkt->side_data[i].data,
51  pkt->side_data[i].size);
52  }
53  av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08x", pkt->side_data[i].size, side_data_crc);
54  }
55  }
56  av_strlcatf(buf, sizeof(buf), "\n");
57  avio_write(s->pb, buf, strlen(buf));
58  return 0;
59 }
60 
62  .name = "framecrc",
63  .long_name = NULL_IF_CONFIG_SMALL("framecrc testing"),
64  .audio_codec = AV_CODEC_ID_PCM_S16LE,
65  .video_codec = AV_CODEC_ID_RAWVIDEO,
66  .write_header = ff_framehash_write_header,
67  .write_packet = framecrc_write_packet,
70 };