89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
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/*
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* frame 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 "libavutil/avstring.h"
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#include "avformat.h"
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#include "internal.h"
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static int framecrc_write_header(struct AVFormatContext *s)
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{
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int i;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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AVCodecParameters *par = st->codecpar;
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if (par->extradata) {
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uint32_t crc = av_adler32_update(0, par->extradata, par->extradata_size);
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avio_printf(s->pb, "#extradata %d: %8d, 0x%08"PRIx32"\n",
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i, par->extradata_size, crc);
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}
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}
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return ff_framehash_write_header(s);
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}
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static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
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{
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uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
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char buf[256];
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snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08"PRIx32,
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pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
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if (pkt->flags != AV_PKT_FLAG_KEY)
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av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
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if (pkt->side_data_elems) {
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int i, j;
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av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
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for (i=0; i<pkt->side_data_elems; i++) {
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uint32_t side_data_crc = 0;
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if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) {
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for (j=0; j<pkt->side_data[i].size; j++) {
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side_data_crc = av_adler32_update(side_data_crc,
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pkt->side_data[i].data + (j^3),
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1);
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}
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} else {
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side_data_crc = av_adler32_update(0,
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pkt->side_data[i].data,
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pkt->side_data[i].size);
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}
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av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08"PRIx32, pkt->side_data[i].size, side_data_crc);
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}
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}
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av_strlcatf(buf, sizeof(buf), "\n");
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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_framecrc_muxer = {
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.name = "framecrc",
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.long_name = NULL_IF_CONFIG_SMALL("framecrc testing"),
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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 = framecrc_write_header,
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.write_packet = framecrc_write_packet,
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.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
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AVFMT_TS_NEGATIVE,
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};
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