1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavformat/crcenc.c
Michael Niedermayer 28ee7757f5 Merge commit 'd92024f18fa3d69937cb2575f3a8bf973df02430'
* commit 'd92024f18fa3d69937cb2575f3a8bf973df02430':
  lavf: more correct printf format specifiers

Conflicts:
	libavformat/asfdec.c
	libavformat/cafdec.c
	libavformat/dxa.c
	libavformat/framecrcenc.c
	libavformat/hnm.c
	libavformat/iff.c
	libavformat/mov.c
	libavformat/mxfdec.c
	libavformat/rmdec.c
	libavformat/rpl.c
	libavformat/smacker.c
	libavformat/xmv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-03-11 21:05:34 +01:00

70 lines
2.0 KiB
C

/*
* CRC encoder (for codec/format testing)
* Copyright (c) 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include "libavutil/adler32.h"
#include "avformat.h"
typedef struct CRCState {
uint32_t crcval;
} CRCState;
static int crc_write_header(struct AVFormatContext *s)
{
CRCState *crc = s->priv_data;
/* init CRC */
crc->crcval = 1;
return 0;
}
static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
CRCState *crc = s->priv_data;
crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
return 0;
}
static int crc_write_trailer(struct AVFormatContext *s)
{
CRCState *crc = s->priv_data;
char buf[64];
snprintf(buf, sizeof(buf), "CRC=0x%08"PRIx32"\n", crc->crcval);
avio_write(s->pb, buf, strlen(buf));
return 0;
}
AVOutputFormat ff_crc_muxer = {
.name = "crc",
.long_name = NULL_IF_CONFIG_SMALL("CRC testing"),
.priv_data_size = sizeof(CRCState),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = crc_write_header,
.write_packet = crc_write_packet,
.write_trailer = crc_write_trailer,
.flags = AVFMT_NOTIMESTAMPS,
};