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https://github.com/FFmpeg/FFmpeg.git
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8e576d5830
* qatar/master: libavutil: add utility functions to simplify allocation of audio buffers. libavutil: add planar sample formats and av_sample_fmt_is_planar() avconv: fix segfault at EOF with delayed pictures pcmdec: remove unneeded resetting of samples pointer avconv: remove a now unused parameter from output_packet(). avconv: formatting fixes in output_packet() avconv: declare some variables in blocks where they are used avconv: use the same behavior when decoding audio/video/subs bethsoftvideo: return proper consumed size for palette packets. cdg: skip packets that don't contain a cdg command. crcenc: add flags avconv: use vsync 0 for AVFMT_NOTIMESTAMPS formats. tiffenc: add a private option for selecting compression algorithm md5enc: add flags ARM: remove needless .text/.align directives Conflicts: doc/APIchanges libavcodec/tiffenc.c libavutil/avutil.h libavutil/samplefmt.c libavutil/samplefmt.h tests/ref/fate/bethsoft-vid tests/ref/fate/cdgraphics tests/ref/fate/film-cvid-pcm-stereo-8bit tests/ref/fate/mpeg2-field-enc tests/ref/fate/nuv tests/ref/fate/tiertex-seq tests/ref/fate/tscc-32bit tests/ref/fate/vmnc-32bit Merged-by: Michael Niedermayer <michaelni@gmx.at>
69 lines
2.0 KiB
C
69 lines
2.0 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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avio_flush(s->pb);
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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 format"),
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.extensions = "",
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.priv_data_size = sizeof(CRCState),
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.audio_codec = CODEC_ID_PCM_S16LE,
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.video_codec = 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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