2005-12-17 19:14:38 +01:00
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/*
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2007-10-28 23:08:09 +01:00
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* CRC encoder (for codec/format testing)
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2009-01-19 16:46:40 +01:00
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* Copyright (c) 2002 Fabrice Bellard
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2002-05-19 01:06:13 +02:00
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*
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2006-10-07 17:30:46 +02:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2002-05-26 00:34:32 +02:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2002-05-19 01:06:13 +02:00
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*
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2006-10-07 17:30:46 +02:00
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* FFmpeg is distributed in the hope that it will be useful,
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2002-05-19 01:06:13 +02:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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2002-05-26 00:34:32 +02:00
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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2002-05-19 01:06:13 +02:00
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*
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2002-05-26 00:34:32 +02:00
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 17:30:46 +02:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-12 23:43:26 +01:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2002-05-19 01:06:13 +02:00
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*/
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2008-05-09 13:56:36 +02:00
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2014-03-10 15:35:59 +01:00
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#include <inttypes.h>
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2008-05-09 13:56:36 +02:00
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#include "libavutil/adler32.h"
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2002-05-19 01:06:13 +02:00
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#include "avformat.h"
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typedef struct CRCState {
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2003-02-11 17:35:48 +01:00
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uint32_t crcval;
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2002-05-19 01:06:13 +02:00
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} CRCState;
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static int crc_write_header(struct AVFormatContext *s)
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{
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2002-05-20 18:31:13 +02:00
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CRCState *crc = s->priv_data;
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2002-05-19 01:06:13 +02:00
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/* init CRC */
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2006-07-19 10:39:50 +02:00
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crc->crcval = 1;
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2002-05-19 01:06:13 +02:00
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return 0;
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}
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2004-05-29 04:06:32 +02:00
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static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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2002-05-19 01:06:13 +02:00
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{
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CRCState *crc = s->priv_data;
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2006-07-13 23:29:01 +02:00
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crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
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2002-05-19 01:06:13 +02:00
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return 0;
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}
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static int crc_write_trailer(struct AVFormatContext *s)
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{
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CRCState *crc = s->priv_data;
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char buf[64];
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2014-03-10 15:35:59 +01:00
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snprintf(buf, sizeof(buf), "CRC=0x%08"PRIx32"\n", crc->crcval);
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2011-02-21 19:28:17 +01:00
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avio_write(s->pb, buf, strlen(buf));
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2012-09-09 21:35:23 +02:00
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2005-11-05 01:10:22 +01:00
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return 0;
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}
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2021-04-19 19:45:24 +02:00
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const AVOutputFormat ff_crc_muxer = {
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2011-07-16 22:18:12 +02:00
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.name = "crc",
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2012-07-24 23:51:41 +02:00
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.long_name = NULL_IF_CONFIG_SMALL("CRC testing"),
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2011-07-16 22:18:12 +02:00
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.priv_data_size = sizeof(CRCState),
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2012-08-05 11:11:04 +02:00
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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2011-07-16 22:18:12 +02:00
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.write_header = crc_write_header,
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.write_packet = crc_write_packet,
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.write_trailer = crc_write_trailer,
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2011-11-20 12:45:36 +01:00
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.flags = AVFMT_NOTIMESTAMPS,
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2002-05-19 01:06:13 +02:00
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};
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