mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 16:52:31 +00:00
f276a490f0
* commit '3f7fd59d151a2773f0e2e93e56b6b13ec6e5334b': avformat: fix typo in avformat_close_input mp3enc: write Xing TOC mp3enc: support MPEG-2 and MPEG-2.5 in Xing header. mp3enc: downgrade some errors in writing Xing frame to warnings lavf: flush the output AVIOContext in av_write_trailer(). lavf: cosmetics, reformat av_write_trailer(). avio: flush the internal buffer in avio_close() Enhance doc on asyncts audiofilter cmdutils: avoid setting data pointers to invalid values in alloc_buffer() libavcodec: remove av_destruct_packet_nofree() Conflicts: libavcodec/avpacket.c libavformat/mp3enc.c libavformat/nutenc.c libavformat/utils.c libavformat/version.h tests/ref/lavf/voc tests/ref/lavf/voc_s16 Merged-by: Michael Niedermayer <michaelni@gmx.at>
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 "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%08x\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,
|
|
};
|