2 * frame CRC encoder (for codec/format testing)
3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg 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.
12 * FFmpeg 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/adler32.h"
23 #include "libavutil/avstring.h"
27 static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
29 uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
32 snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8d, %8d, 0x%08x",
33 pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
34 if (pkt->flags != AV_PKT_FLAG_KEY)
35 av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
36 if (pkt->side_data_elems) {
38 av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
40 for (i=0; i<pkt->side_data_elems; i++) {
41 uint32_t side_data_crc = 0;
42 if (HAVE_BIGENDIAN && AV_PKT_DATA_PALETTE == pkt->side_data[i].type) {
43 for (j=0; j<pkt->side_data[i].size; j++) {
44 side_data_crc = av_adler32_update(side_data_crc,
45 pkt->side_data[i].data + (j^3),
49 side_data_crc = av_adler32_update(0,
50 pkt->side_data[i].data,
51 pkt->side_data[i].size);
53 av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08x", pkt->side_data[i].size, side_data_crc);
56 av_strlcatf(buf, sizeof(buf), "\n");
57 avio_write(s->pb, buf, strlen(buf));
61 AVOutputFormat ff_framecrc_muxer = {
63 .long_name = NULL_IF_CONFIG_SMALL("framecrc testing"),
64 .audio_codec = AV_CODEC_ID_PCM_S16LE,
65 .video_codec = AV_CODEC_ID_RAWVIDEO,
66 .write_header = ff_framehash_write_header,
67 .write_packet = framecrc_write_packet,
68 .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |