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https://github.com/FFmpeg/FFmpeg.git
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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
/*
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* CRC encoder (for codec/format testing)
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* Copyright (c) 2002 Fabrice Bellard
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*
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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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* 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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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/adler32.h"
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#include "avformat.h"
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typedef struct CRCState {
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uint32_t crcval;
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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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CRCState *crc = s->priv_data;
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/* init CRC */
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crc->crcval = 1;
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return 0;
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}
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static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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{
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CRCState *crc = s->priv_data;
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crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
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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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snprintf(buf, sizeof(buf), "CRC=0x%08x\n", crc->crcval);
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avio_write(s->pb, buf, strlen(buf));
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return 0;
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}
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AVOutputFormat ff_crc_muxer = {
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.name = "crc",
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.long_name = NULL_IF_CONFIG_SMALL("CRC testing"),
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.priv_data_size = sizeof(CRCState),
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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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.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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.flags = AVFMT_NOTIMESTAMPS,
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};
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