2 * CRC encoder (for codec/format testing)
3 * Copyright (c) 2002 Fabrice Bellard.
5 * This file is part of FFmpeg.
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.
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.
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
24 typedef struct CRCState {
28 static int crc_write_header(struct AVFormatContext *s)
30 CRCState *crc = s->priv_data;
38 static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
40 CRCState *crc = s->priv_data;
41 crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
45 static int crc_write_trailer(struct AVFormatContext *s)
47 CRCState *crc = s->priv_data;
50 snprintf(buf, sizeof(buf), "CRC=0x%08x\n", crc->crcval);
51 put_buffer(s->pb, buf, strlen(buf));
52 put_flush_packet(s->pb);
56 AVOutputFormat crc_muxer = {