1/*
2 * frame CRC encoder (for codec/format testing)
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include <inttypes.h>
23
24#include "libavutil/adler32.h"
25#include "libavutil/avstring.h"
26
27#include "libavcodec/codec_id.h"
28#include "libavcodec/codec_par.h"
29#include "libavcodec/packet.h"
30
31#include "avformat.h"
32#include "internal.h"
33
34static int framecrc_write_header(struct AVFormatContext *s)
35{
36    int i;
37    for (i = 0; i < s->nb_streams; i++) {
38        AVStream *st = s->streams[i];
39        AVCodecParameters *par = st->codecpar;
40        if (par->extradata) {
41            uint32_t crc = av_adler32_update(0, par->extradata, par->extradata_size);
42            avio_printf(s->pb, "#extradata %d: %8d, 0x%08"PRIx32"\n",
43                        i, par->extradata_size, crc);
44        }
45    }
46
47    return ff_framehash_write_header(s);
48}
49
50static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
51{
52    uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
53    char buf[256];
54
55    snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08"PRIx32,
56             pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
57    if (pkt->flags != AV_PKT_FLAG_KEY)
58        av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
59    if (pkt->side_data_elems) {
60        av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
61
62        for (int i = 0; i < pkt->side_data_elems; i++) {
63            av_strlcatf(buf, sizeof(buf), ", %8"SIZE_SPECIFIER,
64                        pkt->side_data[i].size);
65        }
66    }
67    av_strlcatf(buf, sizeof(buf), "\n");
68    avio_write(s->pb, buf, strlen(buf));
69    return 0;
70}
71
72const AVOutputFormat ff_framecrc_muxer = {
73    .name              = "framecrc",
74    .long_name         = NULL_IF_CONFIG_SMALL("framecrc testing"),
75    .audio_codec       = AV_CODEC_ID_PCM_S16LE,
76    .video_codec       = AV_CODEC_ID_RAWVIDEO,
77    .write_header      = framecrc_write_header,
78    .write_packet      = framecrc_write_packet,
79    .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
80                         AVFMT_TS_NEGATIVE,
81};
82