1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* Adobe Filmstrip muxer
* Copyright (c) 2010 Peter Ross
*
* 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
*/
/**
* @file
* Adobe Filmstrip muxer
*/
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#define RAND_TAG MKBETAG('R','a','n','d')
typedef struct {
int nb_frames;
} FilmstripMuxContext;
static int write_header(AVFormatContext *s)
{
if (s->streams[0]->codec->pix_fmt != PIX_FMT_RGBA) {
av_log(s, AV_LOG_ERROR, "only PIX_FMT_RGBA is supported\n");
return AVERROR_INVALIDDATA;
}
return 0;
}
static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
FilmstripMuxContext *film = s->priv_data;
put_buffer(s->pb, pkt->data, pkt->size);
film->nb_frames++;
return 0;
}
static int write_trailer(AVFormatContext *s)
{
FilmstripMuxContext *film = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
int i;
put_be32(pb, RAND_TAG);
put_be32(pb, film->nb_frames);
put_be16(pb, 0); // packing method
put_be16(pb, 0); // reserved
put_be16(pb, st->codec->width);
put_be16(pb, st->codec->height);
put_be16(pb, 0); // leading
put_be16(pb, 1/av_q2d(st->codec->time_base));
for (i = 0; i < 16; i++)
put_byte(pb, 0x00); // reserved
put_flush_packet(pb);
return 0;
}
AVOutputFormat ff_filmstrip_muxer = {
"filmstrip",
NULL_IF_CONFIG_SMALL("Adobe Filmstrip"),
NULL,
"flm",
sizeof(FilmstripMuxContext),
CODEC_ID_NONE,
CODEC_ID_RAWVIDEO,
write_header,
write_packet,
write_trailer,
};
|
