/* * frame 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 <inttypes.h> #include "libavutil/adler32.h" #include "libavutil/avstring.h" #include "avformat.h" #include "internal.h" static int framecrc_write_header(struct AVFormatContext *s) { int i; for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; AVCodecParameters *par = st->codecpar; if (par->extradata) { uint32_t crc = av_adler32_update(0, par->extradata, par->extradata_size); avio_printf(s->pb, "#extradata %d: %8d, 0x%08"PRIx32"\n", i, par->extradata_size, crc); } } return ff_framehash_write_header(s); } static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt) { uint32_t crc = av_adler32_update(0, pkt->data, pkt->size); char buf[256]; snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08"PRIx32, pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc); if (pkt->flags != AV_PKT_FLAG_KEY) av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags); if (pkt->side_data_elems) { int i, j; av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems); for (i=0; i<pkt->side_data_elems; i++) { uint32_t side_data_crc = 0; if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) { for (j=0; j<pkt->side_data[i].size; j++) { side_data_crc = av_adler32_update(side_data_crc, pkt->side_data[i].data + (j^3), 1); } } else { side_data_crc = av_adler32_update(0, pkt->side_data[i].data, pkt->side_data[i].size); } av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08"PRIx32, pkt->side_data[i].size, side_data_crc); } } av_strlcatf(buf, sizeof(buf), "\n"); avio_write(s->pb, buf, strlen(buf)); return 0; } AVOutputFormat ff_framecrc_muxer = { .name = "framecrc", .long_name = NULL_IF_CONFIG_SMALL("framecrc testing"), .audio_codec = AV_CODEC_ID_PCM_S16LE, .video_codec = AV_CODEC_ID_RAWVIDEO, .write_header = framecrc_write_header, .write_packet = framecrc_write_packet, .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT | AVFMT_TS_NEGATIVE, };