ff02a42394
Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
68 lines
1.9 KiB
C
68 lines
1.9 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;
|
|
|
|
avio_printf(s->pb, "CRC=0x%08"PRIx32"\n", crc->crcval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const 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,
|
|
};
|