FFmpeg: libavformat/framecrcenc.c Source File

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libavformat

framecrcenc.c

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1 /*

2 * frame CRC encoder (for codec/format testing)

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 */

22 #include "libavutil/adler32.h"

23 #include "libavutil/avstring.h"

24 #include "avformat.h"

25 #include "internal.h"

27 static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)

28 {

29 uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);

30 char buf[256];

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);

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 }

61 AVOutputFormat ff_framecrc_muxer = {

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,

68 .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |

69 AVFMT_TS_NEGATIVE,

70 };

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