1/* 2 * frame CRC encoder (for codec/format testing) 3 * Copyright (c) 2002 Fabrice Bellard 4 * 5 * This file is part of Libav. 6 * 7 * Libav is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * Libav is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "libavutil/adler32.h" 23#include "avformat.h" 24 25static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt) 26{ 27 uint32_t crc = av_adler32_update(0, pkt->data, pkt->size); 28 char buf[256]; 29 30 snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc); 31 avio_write(s->pb, buf, strlen(buf)); 32 avio_flush(s->pb); 33 return 0; 34} 35 36AVOutputFormat ff_framecrc_muxer = { 37 .name = "framecrc", 38 .long_name = NULL_IF_CONFIG_SMALL("framecrc testing format"), 39 .extensions = "", 40 .audio_codec = CODEC_ID_PCM_S16LE, 41 .video_codec = CODEC_ID_RAWVIDEO, 42 .write_packet = framecrc_write_packet, 43 .flags = AVFMT_VARIABLE_FPS, 44}; 45