From 39f79f26eb7db34020eda2b1c5124d6252716107 Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Sun, 28 Oct 2007 22:11:07 +0000 Subject: rename crc.c to crcenc.c Originally committed as revision 10869 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/crcenc.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 libavformat/crcenc.c (limited to 'libavformat/crcenc.c') diff --git a/libavformat/crcenc.c b/libavformat/crcenc.c new file mode 100644 index 0000000000..7b1622706e --- /dev/null +++ b/libavformat/crcenc.c @@ -0,0 +1,67 @@ +/* + * 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 "avformat.h" +#include "adler32.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%08x\n", crc->crcval); + put_buffer(&s->pb, buf, strlen(buf)); + put_flush_packet(&s->pb); + return 0; +} + +AVOutputFormat crc_muxer = { + "crc", + "crc testing format", + NULL, + "", + sizeof(CRCState), + CODEC_ID_PCM_S16LE, + CODEC_ID_RAWVIDEO, + crc_write_header, + crc_write_packet, + crc_write_trailer, +}; -- cgit v1.2.3