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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Raw v210 video demuxer
* Copyright (c) 2015 Tiancheng "Timothy" Gu
*
* 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
*/
#include "libavutil/imgutils.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "internal.h"
#include "avformat.h"
typedef struct V210DemuxerContext {
const AVClass *class; /**< Class for private options. */
int width, height; /**< Integers describing video size, set by a private option. */
AVRational framerate; /**< AVRational describing framerate, set by a private option. */
} V210DemuxerContext;
// v210 frame width is padded to multiples of 48
#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
static int v210_read_header(AVFormatContext *ctx)
{
V210DemuxerContext *s = ctx->priv_data;
AVStream *st;
int ret;
st = avformat_new_stream(ctx, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = ctx->iformat->raw_codec_id;
avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
ret = av_image_check_size(s->width, s->height, 0, ctx);
if (ret < 0)
return ret;
st->codecpar->width = s->width;
st->codecpar->height = s->height;
st->codecpar->format = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ?
AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
ctx->packet_size = GET_PACKET_SIZE(s->width, s->height);
st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
(AVRational){8,1}, st->time_base);
return 0;
}
static int v210_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
ret = av_get_packet(s->pb, pkt, s->packet_size);
pkt->pts = pkt->dts = pkt->pos / s->packet_size;
pkt->stream_index = 0;
if (ret < 0)
return ret;
return 0;
}
#define OFFSET(x) offsetof(V210DemuxerContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption v210_options[] = {
{ "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
{ NULL },
};
#if CONFIG_V210_DEMUXER
static const AVClass v210_demuxer_class = {
.class_name = "v210 demuxer",
.item_name = av_default_item_name,
.option = v210_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_v210_demuxer = {
.name = "v210",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.priv_data_size = sizeof(V210DemuxerContext),
.read_header = v210_read_header,
.read_packet = v210_read_packet,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "v210",
.raw_codec_id = AV_CODEC_ID_V210,
.priv_class = &v210_demuxer_class,
};
#endif // CONFIG_V210_DEMUXER
#if CONFIG_V210X_DEMUXER
static const AVClass v210x_demuxer_class = {
.class_name = "v210x demuxer",
.item_name = av_default_item_name,
.option = v210_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_v210x_demuxer = {
.name = "v210x",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.priv_data_size = sizeof(V210DemuxerContext),
.read_header = v210_read_header,
.read_packet = v210_read_packet,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "yuv10",
.raw_codec_id = AV_CODEC_ID_V210X,
.priv_class = &v210x_demuxer_class,
};
#endif // CONFIG_V210X_DEMUXER
|
