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https://git.ffmpeg.org/ffmpeg.git
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59c9dc82f4
This commit does for AVOutputFormat what commit
20f9727018 did for AVCodec:
It adds a new type FFOutputFormat, moves all the internals
of AVOutputFormat to it and adds a now reduced AVOutputFormat
as first member.
This does not affect/improve extensibility of both public
or private fields for muxers (it is still a mess due to lavd).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
69 lines
1.9 KiB
C
69 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 <inttypes.h>
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#include "libavutil/adler32.h"
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#include "avformat.h"
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#include "mux.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_init(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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avio_printf(s->pb, "CRC=0x%08"PRIx32"\n", crc->crcval);
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return 0;
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}
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const FFOutputFormat ff_crc_muxer = {
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.p.name = "crc",
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.p.long_name = NULL_IF_CONFIG_SMALL("CRC testing"),
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.priv_data_size = sizeof(CRCState),
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.p.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.p.video_codec = AV_CODEC_ID_RAWVIDEO,
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.init = crc_init,
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.write_packet = crc_write_packet,
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.write_trailer = crc_write_trailer,
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.p.flags = AVFMT_NOTIMESTAMPS,
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};
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