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libavformat/framecrcenc.c

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00001 /*
00002  * frame CRC encoder (for codec/format testing)
00003  * Copyright (c) 2002 Fabrice Bellard
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavutil/adler32.h"
00023 #include "avformat.h"
00024 
00025 static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
00026 {
00027     uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
00028     char buf[256];
00029 
00030     snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc);
00031     avio_write(s->pb, buf, strlen(buf));
00032     avio_flush(s->pb);
00033     return 0;
00034 }
00035 
00036 AVOutputFormat ff_framecrc_muxer = {
00037     .name              = "framecrc",
00038     .long_name         = NULL_IF_CONFIG_SMALL("framecrc testing format"),
00039     .extensions        = "",
00040     .audio_codec       = CODEC_ID_PCM_S16LE,
00041     .video_codec       = CODEC_ID_RAWVIDEO,
00042     .write_packet      = framecrc_write_packet,
00043     .flags             = AVFMT_VARIABLE_FPS,
00044 };
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